JP2020179964A - Cargo-handling device for powder/granular material - Google Patents

Abstract

To provide a cargo-handling device for powder/granular material which can naturally eliminate a state where a conveyance article is clogged and in which its maintenance can be performed without detaching from a belt conveyor.SOLUTION: A cargo-handling device 1A for powder/granular material comprises a belt conveyor 2, and a chute 4 which is disposed on a discharge side end part 2a of the belt conveyor 2 and which receives a conveyance article 3 as the powder/granular material conveyed by the belt conveyor 2 and leads it out to a vertically lower side. The chute 4 comprises a cylindrical chute body 5 formed by curving a flexible plate, and at least one slit 6 formed over the entire length from an inlet 4a to an outlet 4b for the conveyance article 3 in the chute 4. An upper end of the chute body 5 is fixed to support frames 7a and 7b integrated with the belt conveyor 2. The width A of the slit 6 is expandable as desired.SELECTED DRAWING: Figure 1

Description

The present invention relates to a powder or granular material cargo handling device including a chute that receives a transported object sent out from a discharge side end of a belt conveyor and guides it in the vertical direction.

Generally, a belt conveyor is used as a means for transporting powder or granular material. In addition, as a simple storage method for powders and granules transported by a belt conveyor, stacking on the ground is adopted.
In this case, when the powder or granular material to be transported is sent out from the belt conveyor into the air and piled up on the ground, the dust contained in the transported material is scattered to the surroundings, which causes a problem of polluting the surroundings.
In view of such circumstances, inventions and inventions relating to a structure for preventing the scattering of dust to the surroundings when the powder or granular material is piled up on the ground by using a cargo handling device provided with a belt conveyor are disclosed.

For example, Patent Document 1 discloses a device under the name of "coal dust prevention device", which reliably reduces scattered coal dust when coal is dropped mainly from a high place.
The coal dust prevention device, which is a device disclosed in Patent Document 1, has a trolley that suspends a bellows cylinder having a hem and moves to a coal falling position along a conveyor in conjunction with a tripper, and pulls up the lower end of the bellows cylinder. It is characterized in that a bellows cylinder expansion / contraction mechanism that can be raised and lowered is mounted on the trolley.
According to the invention disclosed in Patent Document 1 having the above configuration, the scattering of coal dust can be surely reduced. In this case, the toughness coal having a low water content can be used as it is. As a result, it is possible to contribute to energy saving and surely reduce dust pollution to the surroundings. Furthermore, the working environment of a worker who operates a bulldozer or the like on a coal storage bile directly under a coal drop can be significantly improved.

Further, Patent Document 2 discloses an invention relating to a dust generation prevention chute capable of preventing dust generation when handling a bulk-stacked raw material that easily generates dust under the name of "dust prevention chute".
The dust generation prevention chute, which is an invention disclosed in Patent Document 2, is a tubular chute for dropping a dust-generating raw material such as a mineral product, and water or the like toward the flow of the raw material falling in the chute. It is characterized in that a spraying device capable of injecting the dust generation prevention liquid is provided.
According to the invention disclosed in Patent Document 2 having the above configuration, when the raw material conveyed by the conveyor falls in the chute, the liquid can be sprayed onto the raw material from the nozzle group arranged in the chute. it can. In this case, the raw material moving in the chute falls to the destination together with the sprayed liquid. As a result, it is possible to reliably prevent dust generation when the raw material conveyed by the conveyor moves in the chute.

Further, Patent Document 3 discloses a device under the name of "dust-proof skirt for chute" regarding a skirt that is attached to the discharge port of the powder or granular material discharge chute for dust-proof.
The dust-proof skirt for a chute, which is a device disclosed in Patent Document 3, is provided with an inner skirt member made of an elastic material whose tip is divided into a plurality of pieces at the peripheral edge of a chute discharge port for discharging powder or granular material. It is characterized in that an outer skirt member made of a sheet material continuous in the circumferential direction is provided on the outside of the inner skirt member so as to cover the inner skirt member.
In the invention disclosed in Patent Document 3 having the above configuration, an outer skirt member made of a sheet material continuously covers the peripheral portion of the discharge port of the chute. Therefore, it is possible to prevent the generation of dust when discharging the powder or granular material. Further, according to the invention disclosed in Patent Document 3, the shape of the outer skirt member can be maintained by the inner skirt member made of an elastic member. Therefore, it is possible to prevent the outer skirt member made of the sheet material from being rolled up. In addition, according to the invention disclosed in Patent Document 3, the provision of the inner skirt member prevents the outer skirt member from coming into direct contact with the powder or granular material. As a result, wear of the outer skirt member can be prevented.

Jikkai Sho 59-91233 Japanese Unexamined Patent Publication No. 51-47771 Jikkenhei 1-85334 Gazette

In the case of the invention disclosed in Patent Document 1 as described above, a portion of the hollow portion of the bellows cylinder that is folded in a mountain and protrudes toward the hollow portion comes into contact with coal (powder or granular material) flowing down on the surface thereof. Therefore, wear of this part is likely to occur. Further, since the bellows-shaped cylinder has a special shape, it is expected that the manufacturing cost thereof will be high.
Therefore, in the case of the device disclosed in Patent Document 1, while the dustproof effect can be expected by installing the bellows cylinder, there is a problem that the bellows cylinder is liable to be deteriorated or damaged due to its structure, and its replacement is costly. It was.

In the case of the invention disclosed in Patent Document 2, dust generation can be suitably prevented by spraying a liquid such as water when dropping the raw material in the chute. On the other hand, there is a problem that the supply of the liquid to be sprayed in the chute, whether it is water or other dust generation inhibitor, requires a separate cost.
Further, in the case of the invention disclosed in Patent Document 2, when the raw material falling in the chute is coal and the liquid sprayed in the chute is water, the coal derived from the chute contains water. become. In this case, when coal is used as fuel, there arises a problem that its combustion efficiency is lowered.
In addition, in the invention disclosed in Patent Document 2, in the unlikely event that the chute is clogged, it is considered difficult to perform maintenance from the outside of the chute due to its structure. Therefore, in the case of the invention disclosed in Patent Document 2, in the unlikely event that the chute is clogged, it is necessary to remove and disassemble the chute for maintenance. Therefore, in the case of the invention disclosed in Patent Document 2, there is also a problem that maintenance of the chute is troublesome.

In the invention disclosed in Patent Document 3, a second chute made of a hollow pipe is interposed between the discharge port of the conveyor and the chute. Then, in the unlikely event that the second chute is clogged, it is considered necessary to remove and maintain the parts on the downstream side of the outlet of the conveyor.
Therefore, even in the case of the device disclosed in Patent Document 3, the dustproof effect can be expected by providing the chute provided with the skirt member, but when clogging occurs in the second chute, the second chute and the second chute and There is a problem that maintenance cannot be performed while the dust collecting cylinder is connected to the discharge port of the conveyor.

The present invention has been made in response to such a conventional situation, and it is possible to prevent the scattering of dust when stacking the conveyed objects sent from the belt conveyor, and in the unlikely event that the chute is clogged. However, the present invention relates to a powder and granular material handling device that can resolve the situation naturally and can easily perform maintenance from the outside of the chute.
Further, the present invention relates to a powder or granular material cargo handling device capable of delaying deterioration due to wear on the inside of a chute and smoothly and freely dropping a transported object sent out from a belt conveyor vertically downward.

In order to achieve the above object, the powder / granular material handling device according to the first invention is provided at the belt conveyor and the discharge side end of the belt conveyor, and accepts the powder / granular material conveyed by the belt conveyor. The chute is provided with a chute that is led out vertically downward, and this chute has a tubular chute body formed by bending a plate body made of an elastic member and the entire length of the chute from the introduction port to the outlet of the conveyed object. The upper end of the chute body is fixed to a support frame integrated with the belt conveyor, and the width of the slit is expanded as desired. Is.
In the first invention of the above configuration, the chute main body has an action of guiding the conveyed object conveyed by the belt conveyor vertically downward. Further, the chute body has an effect of preventing dust contained in the transported object from scattering to the outside of the chute when the conveyed object moves vertically downward in the hollow portion thereof. Further, in the first invention, the chute body is made of an elastic member and has a flexible plate body, and is further provided with at least one slit formed over the entire length from the chute introduction port to the outlet port. Since the slit is configured to expand as desired, the diameter at an arbitrary position in the hollow portion of the chute can be appropriately expanded in the event of clogging due to a transported object during use of the chute. It has the function of enabling. That is, in the first invention, in the unlikely event that a blockage occurs due to a transported object during use of the chute, the slit expands desiredly, whereby the transported object that is the cause of the blockage is freely dropped to the immediately downward side. It has the effect of.
Further, this slit also has an action of enabling insertion of a maintenance instrument from the outer surface side of the chute into the hollow portion of the chute.

The powder and granule cargo handling device according to the second invention is the first invention described above, and the chute body is the first plate body arranged on the delivery side of the transported object on the belt conveyor, and the first plate body thereof. The second plate body is arranged to face the plate body and is arranged on the belt conveyor side, and a slit is provided between the first plate body and the second plate body, respectively. , The upper end position of the first plate body is arranged vertically above the upper end position of the second plate body.
The second invention having the above configuration has the same action as that of the first invention described above. Further, in the second invention, since the chute body is provided with two slits, the deformation of the chute body, that is, the expansion of the diameter in the hollow portion of the chute is smoother and easier than in the case of the first invention described above. It has the effect of making it.
Further, in the second invention, the upper end position of the first plate body is arranged vertically above the upper end position of the second plate body, so that the conveyed objects sent out from the belt conveyor are the first and second. It has the function of preventing the chute from being fed out of the chute made of the second plate.

The powder or granular material cargo handling device according to the third invention is the first or second invention described above, which is made of a plate body made of an elastic member and collides with a conveyed object sent from a belt conveyor in a hollow portion of a chute. It is characterized by having a buffer arranged at a position.
The third invention having the above configuration has the same action as that of the first or second invention described above. Further, in the third invention, the shock absorber has an effect of preventing the conveyed object sent from the belt conveyor into the chute from directly contacting the inner side surface of the chute body and protecting the inner side surface of the chute body.
Further, the shock absorber has an action of attenuating the kinetic energy of the transported object sent out from the belt conveyor and facilitating free fall.

The powder / granular material handling device according to the fourth invention is the third invention described above, wherein the buffer is suspended and held, and can swing in the hollow portion of the chute. Is.
The fourth invention having the above configuration has the same action as that of the third invention described above. Further, in the fourth invention, the shock absorber is suspended and held, and is configured to be swingable in the hollow portion, so that the conveyed material sent out in a urged state from the belt conveyor collides with the shock absorber. The buffer itself is oscillated, which has the effect of more reliably attenuating the kinetic energy of the transported object.
Therefore, according to the fourth invention, it has an effect of making it easier for the transported object flowing in the chute to fall freely as compared with the case where the shock absorber is fixed and does not swing.

The powder / granular material handling device according to the fifth invention is any one of the above-mentioned first to fourth inventions, wherein the chute body, or the chute body and the shock absorber when the buffer is provided, is curved. It is characterized in that it is provided with a shape holder for holding the powder.
The fifth invention having the above configuration has the same action as that of the first to fourth inventions described above. Further, in the fifth aspect of the invention, the shape holder has an effect of always holding the chute body, or the chute body and the buffer, which are made of a flexible plate body, in a state in which the plane thereof is curved.
Further, in the fifth invention, when the material of the shape holder is a metal containing iron in particular, the shape holder itself can also act as a weight for hanging the chute body in the vertical direction. ..

The powder or granular material cargo handling device according to the sixth invention is any one of the above-mentioned first to fourth inventions, and includes a dustproof net erected on the ground so as to surround the chute. The conveyed material derived from the chute is characterized in that it is piled up in a dustproof net.
The sixth invention having the above configuration has the same action as that of the first to fifth inventions described above. Further, in the sixth invention, the dustproof net has an effect of preventing the dust contained in the conveyed material derived from the chute from scattering to the surroundings.

The powder / granular material handling device according to the seventh invention is any one of the above-mentioned first to sixth inventions, wherein the chute body, or the chute body and the shock absorber when the buffer is provided, is vertically oriented. It is characterized by being provided with an elevating device for moving up and down.
The seventh invention having the above configuration has the same action as that of the first to sixth inventions described above. Further, in the seventh invention, the elevating device has an action of moving the chute body, or the chute body and the buffer, up and down in the vertical direction.

According to the first invention as described above, since the chute is provided at the discharge side end of the belt conveyor, when the transported material sent from the belt conveyor is piled up on the ground surface, it falls in the chute. It is possible to prevent the dust contained in the transported object from scattering to the surroundings.
Further, the chute of the first invention is made of a flexible plate and has at least one slit formed over the entire length from the inlet to the outlet of the conveyed object. Therefore, even if a blockage occurs in this chute, the state can be resolved naturally. More specifically, when the conveyed object is clogged in the chute, the conveyed object is further supplied to the portion, and the diameter of the hollow portion of the chute body is desiredly expanded by the weight of the conveyed object itself. .. Then, with such an operation of the chute body, the transported object that has been clogged in the chute body loses its support and falls vertically downward, so that the clog in the chute is cleared.
As described above, in the first invention, even if the chute is clogged by the conveyed object led out from the belt conveyor, the chute itself is deformed and the state can be naturally eliminated.
Further, when the conveyed object conveyed by the belt conveyor contains water, a part of the conveyed object may adhere to the inner surface of the chute body. In such a case, it becomes necessary to clean the inner surface of the chute body as necessary. Alternatively, it may be necessary to check the deterioration of the inner surface of the chute body. In such a case, in the first invention, the maintenance jig can be inserted through the slit formed in the chute. Therefore, according to the first invention, cleaning of the inner surface of the chute body and confirmation of the deterioration state can be easily performed without removing the chute from the support frame integrated with the belt conveyor.
Therefore, according to the first invention, the chute itself can naturally clear the clogging, and the inner surface of the chute can be cleaned and maintained without removing or disassembling the chute. it can.
In addition, in the first invention, since the chute body is made of an elastic member and has flexibility, when the transported object sent out from the belt conveyor collides with the chute body, the chute body is affected by the impact. Temporarily deforms. At this time, the kinetic energy of the transported object that collides with the chute body is significantly attenuated, and the transported object freely falls in the chute. As a result, it is possible to prevent the transported object led out from the outlet of the chute from scattering in the circumferential direction of the outlet.

The second invention has the same effect as that of the first invention described above. Further, in the second invention, the conveyed object delivered from the belt conveyor can be guided into the hollow portion of the chute at the portion protruding vertically upward from the upper end position of the second plate body.
Therefore, according to the second invention, it is possible to more reliably prevent the conveyed object sent from the belt conveyor and the dust contained therein from being scattered outside the chute. As a result, according to the second invention, it is possible to provide a powder or granular material cargo handling device in which dust is less likely to be scattered as compared with the first invention.
Further, in the present invention, the chute body is likely to be worn or damaged at the portion where the conveyed object sent from the belt conveyor directly collides with the object. On the other hand, in the second invention, since the chute body is composed of two plate bodies (first plate body and second plate body), only a plate body that is severely worn or damaged is required. Can be replaced accordingly. Therefore, according to the second invention, the cost required for replacing the chute main body can be reduced.

The third invention has the same effect as that of the first or second invention described above. Further, in the third invention, the kinetic energy of the transported object sent from the belt conveyor can be received and attenuated by the flexible buffer body provided in the hollow portion of the chute and made of an elastic member. .. As a result, according to the third invention, it is possible to prevent the chute body from being rapidly worn or damaged only locally on the inner surface of the chute body due to the conveyed object delivered from the belt conveyor. Therefore, according to the third invention, the durability of the shoot body can be improved as compared with the first or second invention.
Further, according to the third invention, the kinetic energy of the transported object sent out from the belt conveyor can be efficiently damped by the collision with the buffer. As a result, the transported object will smoothly fall freely in the chute. As a result, in the third invention, it is possible to prevent the conveyed material led out from the outlet of the chute from being scattered in the circumferential direction of the outlet.
Therefore, according to the third invention, it is possible to provide a powder or granular material cargo handling device in which the chute body is less likely to be worn or deteriorated and dust is less likely to be scattered as compared with the first or second invention. it can.

The fourth invention has the same effect as that of the third invention described above. Further, according to the fourth invention, the damping effect of the kinetic energy of the transported object can be further enhanced as compared with the case where the buffer does not swing. As a result, in the fourth invention, the conveyed object that collides with the buffer can be more smoothly freely dropped vertically downward.
Therefore, according to the fourth invention, as compared with the third invention described above, it is possible to more reliably prevent the transported object led out from the outlet of the chute from scattering in the circumferential direction of the outlet. ..

The fifth invention has the same effect as the effect of each of the first to fourth inventions described above. Further, in the fifth aspect of the present invention, the outer shape of the chute can be held in a tubular shape by the chute body, or the chute body and the shock absorber provided with the shape holder. In this case, the width of the slit formed in the chute can be reduced while increasing the volume in the hollow portion of the chute. As a result, it is possible to improve the fluidity of the conveyed object in the chute and prevent the conveyed object from jumping out of the chute from the slit formed in the chute.
Further, particularly when the shape holder is made of a metal containing iron, the shape holder can be used as a weight for hanging the chute body in the vertical direction. In this case, simply by installing the shape holder on the chute body, the shape can be held as desired without impairing the deformability of the chute body. As a result, according to the fifth invention, it is possible to provide a powder or granular material cargo handling device having an excellent function with a simple structure.

The sixth invention has the same effect as the effect of each of the first to fifth inventions described above. Further, the sixth invention is provided with a dust-proof net, and by stacking the transported objects in the dust-proof net, until the dust in the transported object derived from the chute reaches the ground where it is stored. In the meantime, it can be prevented from being carried by the wind and scattered around.
Therefore, according to the sixth invention, when the transported material is piled up on the ground by using the powder / granular material handling device according to the sixth invention in a windy environment, the dust contained in the transported material is transported. It is possible to prevent the object from being scattered around the storage place.

The seventh invention has the same effect as the effect of each of the first to sixth inventions described above. Further, according to the seventh invention, by providing the elevating device, the chute main body or the chute main body and the buffer can be moved to the ground and then the replacement work and the maintenance work can be performed on the ground.
According to the seventh invention as described above, it is not necessary for the operator to perform replacement work or maintenance work of the chute main body or the chute main body and the buffer at a high place.
Therefore, according to the seventh invention, it is possible to improve the safety during work of the worker who repairs or maintains the invention.

It is sectional drawing of the main part of the powder and granular material cargo handling apparatus which concerns on Example 1 of this invention. It is a partial perspective view of the chute body in the powder and granular material cargo handling apparatus which concerns on Example 1 of this invention. (A) is a cross-sectional view showing a state in which clogging due to a transported object has occurred in the chute according to the first embodiment of the present invention, and (b) is a cross-sectional view showing a state in which the chute according to the first embodiment of the present invention is further clogged. It is a cross-sectional view which shows the state which has accumulated, and (c) is the cross-sectional view which shows how the clogging in the chute which concerns on Example 1 of this invention is cleared. It is a perspective view of the 1st plate body and its support structure in the powder and granular material cargo handling apparatus which concerns on Example 1 of this invention. It is a perspective view of the 2nd plate body and its support structure in the powder and granular material cargo handling apparatus which concerns on Example 1 of this invention. It is sectional drawing of the main part of the powder and granular material cargo handling apparatus which concerns on Example 2 of this invention. It is a partial perspective view of the chute main body and the shock absorber in the powder and granular material cargo handling apparatus which concerns on Example 2 of this invention. It is a perspective view of the shock absorber and its support structure in the powder and granular material cargo handling apparatus which concerns on Example 2 of this invention. It is a side view of the powder and granular material cargo handling apparatus which concerns on Example 3 of this invention.

The powder or granular material handling device according to the embodiment of the present invention will be described in detail with reference to Examples 1 to 3.

FIG. 1 is a cross-sectional view of a main part of the powder or granular material cargo handling device according to the first embodiment of the present invention. Further, FIG. 2 is a partial perspective view showing an excerpt of a chute main body in the powder or granular material cargo handling device according to the first embodiment of the present invention.
As shown in FIG. 1, the granular material handling device 1A according to the first embodiment is provided on the belt conveyor 2 and the discharge side end portion 2a of the belt conveyor 2, and the powder or granular material is conveyed by the belt conveyor 2. It is provided with a chute 4 that receives the shape-shaped conveyed material 3 and guides it vertically downward. In this figure, for convenience, the transported object 3 is shown as a solid object having a diameter larger than that of the powder or granular material.
Further, as shown in FIGS. 1 and 2, the chute 4 according to the first embodiment is formed by bending a flexible plate body (first plate body 5a and second plate body 5b) made of an elastic member. It is provided with a tubular chute body 5 and at least one slit 6 formed over the entire length from the introduction port 4a to the outlet 4b of the chute 4.
Further, the upper end of the chute main body 5, namely the upper end 4c ₁ of the first plate body 5a, and an upper end 4c ₂ of the second plate member 5b is a support frame which is integral with the belt conveyor 2 (e.g., the support frame 7a And the support frame 7b).
Then, in the chute 4 of the powder or granular material handling device 1A according to the first embodiment, the width A of the slit 6 (see FIG. 1) can be desired to be expanded because the chute body 5 is composed of an elastic member. it can.

According to the chute 4 of the powder or granular material handling device 1A according to the first embodiment as described above, even if the hollow portion 18 of the chute 4 is clogged by the transported object 3, the clogging is naturally cleared. can do.
This mechanism will be described in detail with reference to FIG.
FIG. 3A is a cross-sectional view showing a state in which the chute according to the first embodiment of the present invention is clogged with a conveyed object, and FIG. 3B is a cross-sectional view in that state further inside the chute according to the first embodiment of the present invention. It is a cross-sectional view which shows the state which the conveyed object has accumulated in, and (c) is the cross-sectional view which shows how the clogging in the chute which concerns on Example 1 of this invention is cleared. The same parts as those shown in FIGS. 1 and 2 are designated by the same reference numerals, and the description of their configurations will be omitted.
In general, the state of the conveyed object 3 conveyed by the belt conveyor 2 is not uniform, and the dust content and the water content may be high. In this case, the conveyed object 3 flowing through the hollow portion 18 of the chute 4 adheres to the inner wall of the chute body 5, and in the worst case, the chute 4 is clogged with the conveyed object 3 as shown in FIG. 3 (a). May occur.

Then, in the powder / granular material handling device 1A according to the first embodiment, when the transported object 3 is further supplied into the chute 4 from the state shown in FIG. 3A, the volume of the transported object 3 accumulated in the chute 4 is increased. The weight expands the diameter of the hollow portion 18 of the chute 4 in the circumferential direction (see FIG. 3B). At this time, the width A (see FIG. 3A) of the slit 6 in the chute 4 of the powder or granular material handling device 1A according to the first embodiment is expanded to the width A'(see FIG. 3B).
Then, when the diameter of the hollow portion 18 of the chute 4 expands in the circumferential direction as shown in FIG. 3 (b), that is, the width A of the slit 6 of the chute 4 becomes the width A ′ as shown in FIG. 3 (b). When it spreads to, the transported object 3 accumulated in the chute 4 loses its support and falls vertically downward due to its own weight (see FIG. 3C). As a result, the clogging due to the conveyed object 3 in the chute 4 according to the first embodiment is eliminated.
Therefore, according to the powder / granular material handling device 1A provided with the chute 4 according to the first embodiment, when the chute 4 is clogged with the transported object 3, the state can be eliminated without manpower. Therefore, according to the powder or granular material handling device 1A according to the first embodiment, the cost required for the maintenance and management thereof can be reduced.

In the powder or granular material handling device 1A according to the first embodiment, the material of the first plate body 5a constituting the chute 4 is made of a conventionally known resin as long as it is an elastic member and has flexibility. , Rubber plates can be used without any problems, but rubber plates are particularly suitable.
Further, in the powder or granular material handling device 1A according to the first embodiment, although not particularly shown, a flexible plate body (chute body 5) made of one elastic member is curved into a tubular shape and is curved. A shoot 4 can be used as a plate body provided with one slit 6 formed by separating end faces arranged close to each other by a width A. In this case as well, the same effect as the above-mentioned effect can be exhibited.

On the other hand, in the powder / granular material handling device 1A according to the first embodiment, as shown in FIGS. 1 and 2, the chute main body 5 is made of two flexible plates, that is, the first plate 5a and It may be composed of the second plate body 5b.
In this case, for example, as shown in FIGS. 1 and 2, the first plate 5a, which is one of the two plates constituting the chute body 5, is placed on the delivery side of the conveyed object 3 on the belt conveyor 2. In addition to the arrangement, the second plate body 5b, which is the other plate body, may be arranged at a position facing the first plate body 5a and on the belt conveyor 2 side. The reference numeral C shown in FIG. 2 indicates the delivery direction (transport direction) of the transported object 3.
In this case, since the chute 4 is provided with two slits 6, the deformability of the hollow portion 18 of the chute 4 is improved as compared with the case where the chute 4 is made of a flexible plate body with one elastic member. Can be made to. As a result, when the chute 4 is clogged, the effect of naturally clearing the clog is more likely to be exhibited.

Further, in particular, when the chute body 5 is composed of two elastic members and flexible plates (first plate 5a and second plate 5b), the positional relationship between them is shown in the figure. As shown in 1 and 2, when the transported object 3 is arranged so as to be in front of and behind the moving direction, the upper end 4c ₁ position of the first plate body 5a is further set to the upper end 4c of the second plate body 5b. _It may be arranged vertically above the _two positions.
In this case, in the region on the upper end 4c ₁ side of the first plate 5a protruding vertically upward from the upper end 4c ₂ position of the second plate 5b, the conveyed object 3 sent out by the belt conveyor 2 is received and shot. It can be guided into the hollow portion 18 of 4.
Therefore, when the chute 4 in which the upper end 4c ₁ position of the first plate 5a is higher than the upper end 4c ₂ position of the second plate 5b is used, the conveyed object 3 conveyed by the belt conveyor 2 is the chute 4. It can be prevented from spilling out of the.

Further, the chute body 5 according to the first embodiment (for example, the first plate body 5a and the second plate body 5b) is provided with a shape holder 9 for holding the chute body 5 in a curved state. You may be.
Further, in such a shape holder 9, for example, a bolt 9b for separably integrating the shape holding frames 9a and 9a forming a pair in a curved band shape and the shape holding frames 9a and 9a forming the pair. And a nut 9c may be used.
In such a shape holder 9, for example, as shown in FIGS. 1 and 2, a first plate body 5a or a second plate body 5b is interposed between the paired shape holding frames 9a and 9a, and further. A bolt 9b is inserted while penetrating the overlapping portion of the shape holding frames 9a and 9a paired with the first plate body 5a or the second plate body 5b, and the end portion thereof is fixed by a nut 9c. ..
Then, as shown in FIGS. 1 and 2, by installing a plurality of sets of shape holders 9 at desired intervals on the first plate body 5a and the second plate body 5b, the first plate body 5a The first plate body 5a and the second plate body can be reconstructably deformed while maintaining the three-dimensional shape of the second plate body 5a and the second plate body 5b in a curved shape.

In particular, in the chute 4 according to the first embodiment, when the shape holder 9 is made of a metal containing iron, the shape holder 9 is used in the vertical direction of the first plate body 5a and the second plate body 5b. It can also be used as a weight for hanging.
In this case, when the chute 4 is used, the chute body 5 (for example, the first plate body 5a and the second plate body 5b) is deformed as necessary, and the deformed chute body 5 is loaded with the shape holder 9. Can be used to quickly restore the original curved shape.
Therefore, when the shape holder 9 is made of a metal containing iron, it is not necessary to separately provide the chute 4 with a member or a structure for restoring the deformed chute body 5 into an object and a shape. As a result, since the structure of the chute 4 according to the first embodiment can be simplified, the cost required for its installation and maintenance can be reduced.

In the powder / granular material handling device 1A according to the first embodiment, the chute 4 is provided with at least one slit 6 over the entire length direction thereof, but the chute 4 is a conveyed object 3 made of powder or granular material. Does not leak out from the slit 6 even when the material flows.
This is because the ejector effect is exerted in the slit 6 by the action of the conveyed object 3 flowing in the hollow portion 18 of the chute 4. That is, as the conveyed object 3 flows in the hollow portion 18 of the chute 4, the velocity of the air flow in the hollow portion 18 increases, and the dynamic pressure becomes higher and the static pressure becomes lower than the stationary outside air. The outside air flows into the hollow portion 18 of the chute 4 from the slit 6. Therefore, when the conveyed object 3 freely falls in the chute 4, the conveyed object 3 does not leak from the slit 6.
In order to ensure that the ejector effect as described above is exhibited in the slit 6 formed in the chute 4, the width A of the slit 6 (see FIG. 1) with respect to the maximum width B of the chute 4 (see FIG. 2). ) Must be set to 10% or less.

Further, in the powder / granular material handling device 1A according to the first embodiment, the larger the initial velocity V of the transported object 3 discharged from the outlet 4b of the chute 4, the longer the transported object 3 reaches the ground from the outlet 4b. In addition, the dust contained in the transported object 3 is unlikely to be scattered around.
Further, since the conveyed object 3 sent out from the belt conveyor 2 mainly freely falls in the chute 4, the initial velocity V of the conveyed object 3 at the outlet 4b of the chute 4 is the length of the chute 4, that is, the chute 4. The longer the length L (see FIG. 1) from the upper end 4c ₁ position of the first plate body 5a to the outlet 4b, the faster the speed.
Therefore, in the powder / granular material handling device 1A according to the first embodiment, the length L from the upper end 4c ₁ position of the first plate body 5a to the outlet 4b is appropriately adjusted to be discharged from the outlet 4b. It is possible to more reliably suppress the scattering of dust contained in the conveyed object 3 around.

More specifically, in the powder or granular material handling device 1A according to the first embodiment, the upper end of the first plate body 5a is set so that the initial velocity V of the transported object 3 at the outlet 4b of the chute 4 is 7 m / sec or more. It is advisable to set the length L from the 4c ₁ position to the outlet 4b. More preferably, the length L of the chute 4 is set so that the initial velocity V of the transported object 3 at the outlet 4b of the chute 4 is 8 m / sec or more, and more preferably 9 m / sec or more. It is good.
The inventor needs to set the length L (see FIG. 1) of the chute 4 to at least 4.6 m in order for the initial velocity V of the transported object 3 at the outlet 4b of the chute 4 to be 9.5 m / sec or more. I'm sure there is.
On the other hand, the upper limit of the length L of the chute 4 according to the first embodiment does not have to be set in particular, but the shorter the length L, the more the cost required for procuring the first plate body 5a and the second plate body 5b. Can be cheaper. Therefore, it is desirable that the length L of the chute 4 according to the first embodiment is 5 m or less.

Next, the support structures of the first plate body 5a and the second plate body 5b will be described with reference to FIGS. 4 and 5.
FIG. 4 is a perspective view of the first plate body and its support structure in the powder or granular material cargo handling device according to the first embodiment of the present invention. Further, FIG. 5 is a perspective view of the second plate body and its support structure in the powder or granular material cargo handling device according to the first embodiment of the present invention. The same parts as those shown in FIGS. 1 to 3 are designated by the same reference numerals, and the description of their configurations will be omitted. Further, in FIGS. 4 and 5, the description of the bolt 9b and the nut 9c in the shape holder 9 is omitted.
As shown in FIG. 4, the support structure of the first plate body 5a constituting the chute 4 according to the first embodiment is, for example, a shape holder 9 provided at the upper end 4c ₁ of the first plate body 5a. More specifically, it may be composed of a hanging frame 14a fixed to the shape holding frame 9a of the shape holder 9 and a support shaft 15a fixed to the upper end of the hanging frame 14a.
Then, by installing the support shaft 15a in the support structure of the first plate body 5a as described above on the support frames 7a and 7a integrated with the belt conveyor 2 as shown in FIG. 4, the first plate The body 5a can be fixed in the vicinity of the belt conveyor 2.
In the support structure of the first plate body 5a as described above, the reinforcing member 17 may be arranged in a cross shape on the suspension frame 14a. In this case, the strength of the hanging frame 14a can be increased.
The support structure of the first plate body 5a does not need to be specified in the form shown in FIG. 4, and if it can be fixed to the support frames 7a and 7a integrated with the belt conveyor 2, the structure other than that shown in FIG. 4 May be adopted.
Further, as shown in FIG. 4, the first plate body 5a and its support structure (suspension frame 14a, support shaft 15a, etc.) can be detachably attached to the support frames 7a and 7a integrated with the belt conveyor. You may set it up.
In this case, the first plate body 5a can be removed from the support frames 7a and 7a together with the support structure. As a result, the first plate 5a removed from the support frames 7a and 7a and the support structure thereof can be moved to the ground, and maintenance and replacement work thereof can be performed on the ground. As a result, the work for the maintenance of the powder or granular material cargo handling device 1A according to the first embodiment can be facilitated.

Further, the support structure of the second plate 5b constituting the chute 4 according to the first embodiment is attached to the shape holder 9 provided at the upper end of the second plate 5b, for example, as shown in FIG. More specifically, the shape holding frame 9a may be provided with a hanging tool 20 and a hollow tube 19 fixed to the hanging tool 20, and a support shaft 15b may be inserted through the hollow tube 19. ..
Then, by installing the support shaft 15b in the support structure of the second plate body 5b as described above on the support frames 7b and 7b integrated with the belt conveyor as shown in FIG. 4, the second plate body 5b can be fixed in the vicinity of the belt conveyor 2.
The support structure of the second plate 5b does not need to be specified in the form shown in FIG. 5, and is shown in FIG. 5 if it can be fixed to the support frames 7b and 7b integrated with the belt conveyor. A structure other than the above may be adopted.

Further, as shown in FIG. 5, the second plate body 5b and its support structure (suspension frame 14b, support shaft 15b, etc.) can be detachably attached to the support frames 7b and 7b integrated with the belt conveyor. You may set it up.
In this case, the second plate body 5b can be removed from the support frames 7b and 7b together with the support structure. As a result, the second plate body 5b removed from the support frames 7a and 7a and the support structure thereof can be moved to the ground, and maintenance and replacement work thereof can be performed on the ground. As a result, the work for the maintenance of the powder or granular material cargo handling device 1A according to the first embodiment can be facilitated.
Further, when the hanger 20 and the hollow pipe 19 are used as the support structure of the second plate body 5b, the support shaft 15b can be installed while approaching the upper end 4c ₂ of the second plate body 5b.
In this case, as shown in FIG. 1, the second plate body 5b can be installed in a state of being close to the discharge side end portion 2a of the belt conveyor 2. As a result, it is possible to prevent the conveyed object 3 sent out from the discharge side end portion 2a of the belt conveyor 2 from entering the hollow portion 18 of the chute 4 and being scattered to the surroundings.

Next, the powder or granular material handling device according to the second embodiment of the present invention will be described in detail with reference to FIGS. 6 to 8.
FIG. 6 is a cross-sectional view of a main part of the powder or granular material cargo handling device according to the second embodiment of the present invention. Further, FIG. 7 is a partial perspective view of a chute body and a buffer in the powder or granular material handling device according to the second embodiment of the present invention. The same parts as those shown in FIGS. 1 to 5 are designated by the same reference numerals, and the description of their configurations will be omitted.
As shown in FIG. 6, the powder or granular material handling device 1B according to the second embodiment of the present invention is flexible at a position where it collides with the conveyed object 3 sent out from the belt conveyor 2 in the hollow portion 18 of the chute 4. A buffer 8 made of a plate body having the above may be provided.
In this case, since the buffer 8 is provided in the hollow portion 18 of the chute 4, the conveyed object 3 sent out from the belt conveyor 2 is placed on the inner side surface of the first plate body 5a which is the inner side surface of the chute 4. It is possible to prevent direct contact. As a result, it is possible to prevent the inner surface of the chute 4 from being rapidly worn or damaged, so that the useful life of the chute 4 can be extended.

Further, as shown in FIG. 6, when the chute 4 is made of an elastic member and includes a flexible cushioning body 8, the conveyed object 3 sent from the belt conveyor 2 into the hollow portion 18 of the chute 4 is a cushioning body. By colliding with 8 and deforming the cushioning body 8, the kinetic energy of the conveyed object 3 can be attenuated. As a result, the transported object 3 that has collided with the buffer body 8 flows down in the hollow portion 18 of the chute 4 vertically downward in a state that is almost free fall.
Therefore, in the powder / granular material handling device 1B according to the second embodiment, when the conveyed object 3 sent out in a urged state from the belt conveyor 2 is led out from the outlet 4b of the chute 4, the conveyed object 3 is delivered. The lead-out port 4b has almost no kinetic energy to diffuse in the circumferential direction. Therefore, it is possible to more reliably prevent the dust contained in the conveyed object 3 from scattering around the chute 4.

Further, in the powder / granular material handling device 1B according to the second embodiment, the buffer 8 housed in the hollow portion 18 of the chute 4 is a first plate body 5a or a second plate body 5a or a second plate body 8 as shown in FIGS. The shape holder 9 may be provided in the same manner as the plate body 5b. In this case, the three-dimensional shape of the shock absorber 8 can be maintained in a curved shape while maintaining the deformability.
In this case, the horizontal cross section of the buffer body 8 in the hollow portion 18 of the chute 4 is in a curved state. Therefore, the conveyed objects 3 that collide with and bounce off the inner side surface of the buffer body 8 (the surface on the side where the conveyed objects 3 collide) further collide with each other. As a result, the kinetic energy of the conveyed object 3 can be attenuated by the conveyed objects 3 colliding with the buffer 8 and also by the conveyed objects 3 colliding with each other.
Therefore, when the shock absorber 8 is provided with the shape holder 9, the effect of attenuating the kinetic energy of the conveyed object 3 can be further improved as compared with the case where the shape holder 9 is not provided.

Further, in the powder / granular material handling device 1B according to the second embodiment, when the shape holder 9 attached to the shock absorber 8 is made of a metal containing iron, the shape holder 9 itself is used and the shock absorber 8 is used. It can be used as a weight for hanging.
In this case, it is not necessary to separately provide a weight for suspending the buffer 8 in the hollow portion of the chute 4 according to the second embodiment. Therefore, the structure of the chute 4 according to the second embodiment can be simplified. As a result, the construction cost of the powder or granular material handling device 1B according to the second embodiment can be reduced.

Here, the support structure of the buffer 8 will be described in detail with reference to FIG.
FIG. 8 is a perspective view of a shock absorber and its support structure in the powder or granular material cargo handling device according to the second embodiment of the present invention. The same parts as those shown in FIGS. 1 to 7 are designated by the same reference numerals, and the description of their configurations will be omitted.
The support structure of the shock absorber 8 according to the second embodiment is the same as the support structure of the first plate body 5a shown in FIG. 4, for example, on the shape holder 9 provided at the upper end 8a of the shock absorber 8. More specifically, it may be composed of a hanging frame 14b fixed to the shape holding frame 9a of the shape holder 9 and a support shaft 15c fixed to the upper end of the hanging frame 14b.
Then, by arranging the support shaft 15c in the support structure of the buffer 8 as described above on the support frames 7a and 7a integrated with the belt conveyor as shown in FIG. 8, the buffer 8 is hollowed out in the chute 4. It can be fixed in a state of hanging in the portion 18.

In the support structure of the shock absorber 8 as described above, the reinforcing member 17 may be arranged in a cross shape on the suspension frame 14b. In this case, the strength of the hanging frame 14a can be increased.
Further, the support structure of the buffer 8 need not be specified in the form shown in FIG. Further, in the powder / granular material handling device 1B according to the second embodiment, the case where the support structure of the shock absorber 8 is fixed to the support frames 7a and 7a integrated with the belt conveyor is described as an example. The body 8 may be attached to the support structure (suspension frame 14a) of the first plate body 5a (not shown).
Further, as in the case of the first plate body 5a, the shock absorber 8 and its support structure may be detachably attached to the support frames 7a and 7a integrated with the belt conveyor.
In this case, the buffer 8 can be removed from the support frames 7a and 7a together with the support structure. In this case, the removed buffer 8 and its support structure can be moved to the ground to perform maintenance and replacement work on the ground. As a result, the work for the maintenance of the powder or granular material cargo handling device 1B according to the second embodiment can be facilitated.

Further, in the powder / granular material handling device 1B according to the second embodiment, the buffer 8 may be made swingable in the hollow portion 18 of the chute 4 by suspending and holding the buffer 8 in the chute 4.
In this case, when the conveyed object 3 sent out from the belt conveyor 2 collides with the buffer body 8, the shock absorber 8 can be swung by the impact. At this time, the kinetic energy of the conveyed object 3 is consumed not only by deforming the buffer 8 itself but also by swinging the buffer 8 itself. As a result, the effect of attenuating the kinetic energy of the conveyed object 3 can be increased as compared with the case where the buffer body 8 does not swing.
As a result, the conveyed object 3 after colliding with the buffer 8 can be more reliably freely dropped. Therefore, it is possible to more reliably prevent the dust contained in the conveyed object 3 sent out from the belt conveyor 2 from scattering to the surroundings.

Further, in the powder / granular material cargo handling device 1B according to the second embodiment, the buffer 8 directly contacts (collides) with the conveyed object 3 sent out from the belt conveyor 2, so that the first plate body 5a and the second plate body 5b It is expected that the wear and damage will be severe compared to.
Therefore, when the buffer 8 according to the second embodiment is used, a part of the flexible plate body may be torn and fall together with the conveyed object 3.
Further, when the shock absorber 8 according to the second embodiment is provided with the metal shape holder 9, a part of the shock absorber 8 provided with the shape holder 9 is torn and piled up in the transported object 3. It is not desirable to leave it mixed in.
In view of such circumstances, in the powder / granular material handling device 1B according to the second embodiment, even if a part of the buffer 8 is torn during the use of the buffer 8, the torn buffer is used. The buffer 8 may be provided with a fall protection device 13 so that the 8 does not fall together with the conveyed object 3.

More specifically, as shown in FIGS. 7 and 8, the shape holder 9 which is made of a metal wire or chain and is installed on the upper end 8a side of the shock absorber 8 and the lower end 8b side of the shock absorber 8 A fall prevention tool 13 provided so as to connect the shape holder 9 installed in the vehicle may be provided.
In this case, even if the shock absorber 8 is divided at an intermediate position thereof, the fragments of the shock absorber 8 are held in a suspended state by the fall protection tool 13. As a result, it is possible to prevent the torn pieces of the buffer 8 from falling together with the conveyed object 3.
Therefore, since the buffer 8 according to the second embodiment is provided with the fall prevention device 13, a part of the buffer 8 and the shape holder 9 is contained in the conveyed object 3 during the use of the powder or granular material handling device 1B. It can be prevented from being mixed. As a result, the quality of the transported object 3 conveyed by the powder / granular material cargo handling device 1B according to the second embodiment can be maintained in a high state.

Further, in the powder or granular material handling device 1B according to the second embodiment, as described above, the chute 4 itself is composed of a flexible plate body (for example, a first plate body 5a and a second plate body 5b). There is. Therefore, when the impact applied to the cushioning body 8 is particularly large when the conveyed object 3 collides, the first plate body 5a may be pushed out together with the cushioning body 8 toward the outer surface side of the chute 4. There is.
In this case, there is a concern that the width A (see FIG. 6) of the slit 6 formed over the entire length of the chute 4 becomes wider than necessary, and the ejector effect described above may not be exhibited.
In view of such circumstances, in the powder / granular material handling device 1B according to the second embodiment, even when a force such as pushing the first plate 5a together with the buffer 8 toward the outer surface side of the chute 4 acts. A deformation prevention material 12 for keeping the buffer 8 in its original position against this force may be provided.

More specifically, the deformation preventing material 12 as described above may be a plurality of rod-shaped bodies hanging in the vertical direction between the inner surface of the chute 4 and the buffer 8.
In this case, the movement of the shock absorber 8 pushed out to the outer surface side of the chute 4 by the collision with the conveyed object 3 can be regulated by the fall protection tool 13.
That is, even when the buffer 8 is configured to swing toward the outside of the chute 4 due to the collision with the conveyed object 3, the buffer 8 shoots due to the pressing force of the conveyed object 3 sent out from the belt conveyor 2. It is possible to prevent the 4 from being pushed out to the outer surface side.
Therefore, since the powder or granular material cargo handling device 1B according to the second embodiment includes the buffer 8 provided with the deformation preventing material 12, the slit 6 can be prevented from unintentionally expanding when the chute 4 is used.
Thereby, when the chute 4 is used in the powder or granular material cargo handling device 1B according to the second embodiment, it is possible to prevent the dust contained in the conveyed object 3 from scattering to the outside from the slit 6 of the chute 4.

In addition, in FIGS. 6 to 8, the case where the deformation prevention material 12 is attached to the shape holder 9 provided on the upper end 8a side of the shock absorber 8 is described as an example, but the deformation prevention material 12 is attached. The structure does not have to be specified as the structure shown in FIGS. 6 to 8.
More specifically, for example, a support member (not shown) is bridged between the support structure of the first plate body 5a (for example, the suspension frame 14a) and the support structure of the buffer body 8 (for example, the suspension frame 14b). You may install the deformation prevention material 12 on this support member.

Further, in the powder / granular material handling device 1B according to the second embodiment, the deformation preventing material 12 interposed between the chute 4 and the buffer 8 is a shape holder 9 (for example, a shape holding frame 9a) or the above-mentioned not shown. It may be fixedly attached to the support member, or may be oscillatingly attached to the attachment target.
In this case, the kinetic energy of the conveyed object 3 can be attenuated by swinging the deformation preventing material 12 in addition to swinging the buffer body 8.
Therefore, the kinetic energy of the conveyed object 3 can be more reliably damped as compared with the case where the deformation preventing material 12 does not swing. As a result, the transported object 3 after colliding with the buffer 8 can be decelerated more reliably, and can be easily dropped freely. As a result, it is possible to more reliably prevent the dust contained in the conveyed object 3 led out from the outlet 4b of the chute 4 from scattering to the surroundings.

Further, the form of the deformation preventing material 12 may be a simple rod body, but may be a chain as shown in FIGS. 6 to 8. That is, the deformation preventing material 12 itself may have deformability that can be restored by its own weight.
In this case, the kinetic energy of the conveyed object 3 can be attenuated by deforming the deformation preventing material 12 itself in addition to swinging the deformation preventing material 12.
In this case, the effect of attenuating the kinetic energy of the conveyed object 3 can be further enhanced as compared with the case where the deformation preventing material 12 is a simple rod body.
As a result, the kinetic energy of the conveyed object 3 can be further attenuated as compared with the case where the deformation preventing material 12 only swings and does not deform. Therefore, it is possible to more reliably prevent dust from scattering to the surroundings from the flowing conveyed object 3 in the chute 4.

The material of the deformation preventing material 12 is preferably a metal, and is preferably a heavy metal containing iron.
By forming the deformation preventing material 12 from a heavy material in this way, it is possible to prevent the buffer 8 and the first plate 5a from being significantly displaced from their original positions due to the pressing force of the flowing conveyed object 3. be able to. As a result, it is possible to prevent the width A of the slit 6 of the chute 4 from being unintentionally widened.
Further, in addition to these effects, the effect of decelerating the conveyed object 3 sent out from the belt conveyor 2 is also enhanced.
Therefore, when the chute 4 has a shock absorber 8 provided with a deformation preventing material 12 made of a heavy metal containing iron, it is possible to provide a powder or granular material cargo handling device 1B having particularly excellent dustproof performance.

Subsequently, the powder or granular material cargo handling device according to the third embodiment of the present invention will be described in detail with reference to FIG.
FIG. 9 is a side view of the powder or granular material cargo handling device according to the third embodiment of the present invention. The same parts as those shown in FIGS. 1 to 9 are designated by the same reference numerals, and the description of their configurations will be omitted.
According to the powder and granular material handling devices 1A and 1B according to the first and second embodiments, the conveyed object 3 delivered from the belt conveyor 2 is conveyed until it passes through the chute 4 and is led out from the outlet 4b. Dust generation from the object 3 can be efficiently prevented.
On the other hand, the powder and granular material handling devices 1A and 1B according to the first and second embodiments are usually installed outdoors. Therefore, even if dust generation from the transported object 3 can be prevented when the chute 4 passes, depending on the outdoor weather conditions, the transported object 3 may reach the ground from the outlet 4b of the chute 4. There was a concern that the dust contained in the transported object 3 would be scattered around by the wind.
In view of such circumstances, the powder or granular material cargo handling device 1C according to the third embodiment includes a dustproof net 10 installed so as to surround the chute and standing on the ground as shown in FIG. May be good.
In this case, in the powder / granular material cargo handling device 1C according to the third embodiment, the conveyed objects 3 led out from the chute 4 are piled up inside the dustproof net 10.
As described above, when the powder or granular material cargo handling device 1C according to the third embodiment is provided with the dustproof net 10, the dustproof net 10 can more reliably prevent the dust contained in the conveyed object 3 from being scattered to the surroundings. it can.

It is desirable that the height H ₁ from the ground 11 to the top 10a of the dustproof net 10 is higher than the distance H ₂ from the ground 11 to the outlet 4b of the chute 4 (see FIG. 9).
However, on the increase is about the construction cost height H ₁ of the dust-proof net 10 is high, dust-proof net 10 also increases the risk of collapse during strong winds. Therefore, it can be said that it is preferable that the height H ₁ of the dustproof net 10 is as low as possible.
In view of such circumstances, in the powder / granular material handling device 1C according to the third embodiment, as shown in FIG. 9, the top portion 10a of the dustproof net 10 and the outlet 4b of the chute 4 at the position closest to the dustproof net 10 That is, it is preferable to set the angle θ formed by the straight line connecting the side end portion of the chute 4 and the vertical straight line from the side end portion within the range of 60 to 75 degrees.
In this case, even if the distance H ₂ from the ground 11 to the outlet 4b of the chute 4 is higher than the height H ₁ from the ground 11 to the top 10a of the dustproof net 10, the dust in the transported object 3 is the dustproof net 10. It can be made difficult to scatter beyond.
In this case, in the powder / granular material cargo handling device 1C according to the third embodiment, the cost required for installing the dustproof net 10 can be reduced, and the risk of the dustproof net 10 collapsing due to a strong wind can be reduced.

Further, although not particularly shown, the powder or granular material handling devices 1A to 1C according to the present invention each have a chute body 5 (for example, a first plate body 5a and a second plate body 5b) in addition to the above-described configuration. Alternatively, when a shock absorber is provided in addition to the chute main body 5, an elevating device (not shown) for moving the chute main body 5 and the shock absorber 8 up and down in the vertical direction may be provided.
More specifically, a winch or the like can be used as such an elevating device.
As described above, when the powder or granular material handling devices 1A to 1C according to the present invention are provided with an elevating device, the chute main body 5, the chute main body 5 and the buffer 8 can be lowered to the ground for maintenance or replacement work. it can.
In this case, it is not necessary to perform maintenance or replacement work of the chute main body 5 or, if the buffer body 8 is provided, the chute main body 5 and the buffer body 8 at a dangerous high place. Therefore, in the powder and granular material handling devices 1A to 1C according to the present invention, the chute main body 5 or, when the buffer body 8 is provided, the chute main body 5 and the buffer body 8 can be attached to and detached from the support frame integrated with the belt conveyor. It is possible to provide a powder and granular material cargo handling device having excellent safety by being installed and provided with an elevating device (not shown).

Further, when the powder or granular material handling devices 1A to 1C according to the present invention are provided with, for example, a winch as an elevating device, the chute body 5 or, when the buffer 8 is provided, the chute body 5 and the buffer 8 are handled. For the sake of simplicity, the support shafts 15a and 15b and the hollow pipe 19 may be provided with a hook portion 16 (see FIGS. 1, 4, 5, 6 and 8) for hooking a hook or the like.
In this case, when the chute main body 5 or the buffer body 8 is provided, the chute main body 5 and the buffer body 8 can be raised and lowered efficiently and safely.
In addition, in FIGS. 4, 5 and 8, for each support structure in the chute main body 5, the chute main body 5 and the buffer body 8 in case of stability during suspension and in case the hooking portion 16 is damaged. Although the case where the hooking portions 16 are provided three by three is described as an example, two hooking portions 16 may be provided in each support structure.
Further, the hooking portion 16 is not always necessary, and a chain or the like can be wound around the support shafts 15a to 15c and suspended and held to raise or lower them.

Although not particularly shown, the powder and granular material handling devices 1A to 1C according to the present invention, including the belt conveyor 2, are provided with a cover and scaffolding for maintenance and inspection around the powder and granular material handling devices 1A to 1C.
Further, the powder and granular material handling devices 1A to 1C according to the present invention may be provided with an outer cylinder 21 (see FIGS. 1, 6 and 9) around the chute 4.
When the powder or granular material handling devices 1A to 1C according to the present invention are provided with such an outer cylinder 21, the chute 4 can be protected from strong winds and the like.
In this case, even when the chute 4 is used in a strong wind environment, it becomes easy to maintain the three-dimensional shape of the chute 4 in a tubular shape. As a result, even when the powder or granular material handling devices 1A to 1C according to the present invention are used in a strong wind environment, it is possible to prevent dust from leaking from the slit 6.

In addition, in the powder and granular material handling devices 1A to 1C according to the present invention, the shape holder 9 is formed so that the horizontal cross-sectional shape of the chute 4 forms a streamline that shrinks toward the slit 6. May be good.
In this case, the wind pressure acting on the chute 4 can be reduced depending on the direction of the wind flowing around the chute 4.
As a result, when the powder or granular material handling devices 1A to 1C according to the present invention are used in an environment where the wind always blows in a specific direction, the adverse effect of the wind on the chute 4 can be reduced. Therefore, according to the powder / granular material handling devices 1A to 1C according to the present invention having the above configuration, it is possible to provide the powder / granular material handling device having excellent weather resistance.

As described above, the present invention can prevent dust contained in the conveyed material from scattering to the surroundings when the conveyed material made of powder or granular material is sent out from the belt conveyor and piled up, and the chute is clogged. It is a powder and granular material cargo handling device that can resolve the situation naturally when a problem occurs, and can perform maintenance and inspection from the outside without removing the chute, and is related to manufacturing equipment, civil engineering, agriculture, etc. Available in the field.

1A to 1C ... Powder and granular material handling device 2 ... Belt conveyor 2a ... Discharge side end 3 ... Conveyed material 4 ... Chute 4a ... Introduction port 4b ... Outlet port 4c ₁ , 4c ₂ ... Upper end 5 ... Shoot body 5a ... First Plate 5b ... Second plate 6 ... Slits 7a, 7b ... Support frame 8 ... Buffer 8a ... Upper end 8b ... Lower end 9 ... Shape holder 9a ... Shape retention frame 9b ... Bolt 9c ... Nut 10 ... Dustproof net 10a ... Top 11 ... Ground 12 ... Deformation preventive material 13 ... Fall protection 14a, 14b ... Suspension frame 15a, 15b, 15c ... Support shaft 16 ... Hooking part 17 ... Reinforcing material 18 ... Hollow part 19 ... Hollow pipe 20 ... Hanging tool 21 ... Outer cylinder

Claims (7)

It is provided with a belt conveyor and a chute provided at the discharge side end of the belt conveyor to receive the powdery and granular material conveyed by the belt conveyor and lead it out vertically downward.
The shoot
A tubular chute body made by bending a plate made of elastic members,
The chute is provided with at least one slit formed over the entire length from the inlet to the outlet of the transported object.
The upper end of the chute body is fixed to a support frame integrated with the belt conveyor.
A powder or granular material handling device characterized in that the width of the slit is expanded as desired. The chute main body is arranged so as to face the first plate body arranged on the delivery side of the conveyed object in the belt conveyor and the first plate body, and is arranged on the belt conveyor side. It consists of a second plate and
The slits are provided between the first plate body and the second plate body, respectively, and
The powder or granular material cargo handling device according to claim 1, wherein the upper end position of the first plate body is arranged vertically above the upper end position of the second plate body. Claim 1 or claim, wherein the plate body is made of an elastic member, and is provided with a shock absorber arranged at a position where it collides with the conveyed object delivered from the belt conveyor in the hollow portion of the chute. 2. The powder / granular material handling device according to 2. The powder or granular material handling device according to claim 3, wherein the buffer is suspended and held, and can swing in the hollow portion of the chute. Claims 1 to 4, wherein the chute body, or when the chute body is provided, and the chute body and the shape holder for holding the buffer body in a curved shape are provided. The powder or granular material handling device according to any one of the following items. A dustproof net is provided so as to surround the chute and is erected on the ground.
The powder or granular material cargo handling device according to any one of claims 1 to 5, wherein the transported material derived from the chute is piled up in the dustproof net. Claims 1 to 6, wherein the chute body, or when the chute body and the buffer body are provided, are provided with an elevating device for moving the chute body and the buffer body up and down in the vertical direction. The powder and granular material handling device according to any one of the following items.

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