JP7301588B2 - Granular cargo handling equipment - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a granular material handling apparatus comprising a chute for receiving a material sent out from the discharge side end of a belt conveyor and leading it out in the vertical direction.

Generally, a belt conveyor is used as means for conveying powder. In addition, piling up on the ground is adopted as a simple storage method for the granular material conveyed by the belt conveyor.
In this case, when the granules, which are the objects to be conveyed, are sent out into the air from the belt conveyor and piled up on the ground, the dust contained in the objects to be conveyed scatters around and contaminates the surroundings.
In view of such circumstances, there have been disclosed inventions and ideas relating to a structure for preventing scattering of dust when piling up granular materials on the ground using a cargo handling apparatus equipped with a belt conveyor.

For example, Patent Literature 1 discloses a device under the name of "coal dust prevention device" that reliably reduces scattering coal dust mainly when coal is dropped from a high place.
The coal dust prevention device, which is the device disclosed in Patent Document 1, has a bellows tube with a wide bottom suspended at the bottom thereof, and a carriage that moves along the conveyor to a coal drop position in conjunction with a tripper, and pulls up the lower end of the bellows tube. The bellows tube expansion and contraction mechanism that can be moved up and down is mounted on the carriage.
According to the device disclosed in Patent Document 1 having the above configuration, it is possible to reliably reduce coal dust scattering. In this case, dust-generating coal with a low moisture content can be used as it is. As a result, it is possible to contribute to energy saving and to reliably reduce dust pollution to the surroundings. Furthermore, the working environment of workers who operate a bulldozer or the like on the coal storage vile immediately below the fallen coal can be greatly improved.

In addition, Patent Document 2 discloses an invention related to a dust generation prevention chute under the name of "dust generation prevention chute" which can prevent dust generation when handling bulk raw materials that tend to generate dust.
The dust generation prevention chute, which is the invention disclosed in Patent Document 2, has a cylindrical chute for dropping raw materials having dust generation properties such as mineral products, and water and other substances are directed toward the flow of raw materials falling in the chute. is provided with a spray device capable of spraying the anti-dust liquid.
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. can. In this case, the material moving in the chute falls to the destination together with the sprayed liquid. As a result, it is possible to reliably prevent the generation of dust when the material conveyed by the conveyor moves through the chute.

Furthermore, Japanese Patent Laid-Open No. 2002-200003 discloses a device related to a skirt attached to the discharge port of a granular material discharge chute under the name of "dust-proof skirt for chute" for dust-proof purposes.
A dustproof 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 and having a tip portion divided into a plurality of parts at the peripheral edge of a discharge port of a chute for discharging 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 outer side of the inner skirt member so as to cover it.
In the invention disclosed in Patent Document 3 having the above configuration, the outer skirt member made of sheet material continuously covers the periphery of the outlet of the chute. Therefore, it is possible to prevent the generation of dust when the powder is discharged. Furthermore, 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 idea disclosed in Patent Document 3, the provision of the inner skirt member prevents the outer skirt member from directly contacting the granular material. As a result, wear of the outer skirt member can be prevented.

Japanese Utility Model Laid-Open No. 59-91233 JP-A-51-47771 Japanese Utility Model Laid-Open No. 1-85334

In the case of the device disclosed in Patent Document 1 as described above, the portion that is folded in the mountain inside the hollow portion of the bellows tube and protrudes toward the hollow portion comes into contact with the coal (granules) flowing down on the surface thereof. Therefore, this part is prone to wear. Moreover, since the bellows-shaped cylindrical body has a special shape, it is expected that the manufacturing cost will be high.
Therefore, in the case of the device disclosed in Patent Document 1, although a dust-proof effect can be expected by installing the bellows tube, there is a problem that the bellows tube is likely to be deteriorated or damaged due to its structure, and it costs a lot to replace the bellows tube. rice field.

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, regardless of whether the liquid to be sprayed in the chute is water or an antidust agent, there is a problem that the supply of the liquid is costly.
Furthermore, 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 discharged from the chute contains water. become. In this case, when coal is used as fuel, the problem arises that the combustion efficiency is lowered.
In addition, in the invention disclosed in Patent Document 2, if clogging should occur in the chute, 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, if the chute should become 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 the problem that maintenance of the chute takes time and effort.

In the device disclosed in Patent Document 3, a second chute made of a hollow tube is interposed between the outlet of the conveyor and the chute. If clogging occurs in the second chute, it is considered necessary to remove the parts downstream of the outlet of the conveyor for maintenance.
Therefore, even in the case of the device disclosed in Patent Document 3, a dustproof effect can be expected by providing a chute having a skirt member. There is a problem that maintenance cannot be performed while the dust collecting cylinder is connected to the outlet of the conveyor.

The present invention has been made in response to such conventional circumstances, and is capable of preventing dust from scattering when goods sent out from a belt conveyor are piled up. However, the present invention relates to a powdery or granular material handling apparatus capable of naturally resolving such a state and capable of being easily maintained from the outside of the chute.
Further, the present invention relates to a granular material handling apparatus capable of delaying deterioration due to abrasion of the inner side of the chute and smoothly free-falling the material sent out from the belt conveyor vertically downward.

In order to achieve the above object, the first invention is a granular material handling apparatus comprising a belt conveyor, and a belt conveyor provided at the discharge side end of the belt conveyor to receive the granular materials conveyed by the belt conveyor. The chute has a tubular chute body formed by bending a plate made of an elastic member, and the chute extends over the entire length of the chute from the introduction port to the discharge port of the article to be conveyed. at least one slit formed in the belt conveyor, the upper end of the chute body being fixed to a support frame integrated with the belt conveyor, the width of the slit expanding as desired. is.
In the first invention configured as described above, the chute main body has the function of guiding the article conveyed by the belt conveyor to the vertically downward side. Furthermore, the chute body has the function of preventing dust contained in the conveyed material from scattering outside the chute when the conveyed material moves vertically downward within the hollow portion. Further, in the first invention, the chute main body is made of an elastic plate having flexibility, and is provided with at least one slit formed along the entire length from the introduction port to the discharge port of the chute, and Since the slit is configured to be expanded as desired, the diameter of an arbitrary position within the hollow portion of the chute can be expanded as desired in the event of clogging due to an object to be conveyed during use of the chute. has the effect of enabling In other words, in the first invention, in the unlikely event that an object to be conveyed is clogged during use of the chute, the slit expands as desired, thereby allowing the object to be conveyed, which is the cause of the clogging, to freely fall directly below. It has the effect of
Furthermore, this slit also has the effect of enabling insertion of a maintenance tool into the hollow portion of the chute from the outer side of the chute.

The powdery or granular material handling apparatus, which is the second invention, is the first invention described above, and the chute body includes a first plate disposed on the delivery side of the conveyed object in the belt conveyor, and the first plate. and a second plate arranged opposite to the plate and arranged on the belt conveyor side, each having a slit between the first plate and the second plate, and , the upper end position of the first plate is arranged vertically above the upper end position of the second plate.
The second invention configured as described above has the same effects as those of the first invention described above. Furthermore, in the second invention, the chute body has two slits, so that the deformation of the chute body, that is, the expansion of the inner diameter of the hollow portion of the chute, is smoother and easier than in the case of the first invention. It has the effect of making
Further, in the second invention, the upper end position of the first plate is arranged vertically above the upper end position of the second plate, so that the goods sent out from the belt conveyor are It has the effect of preventing the material from being fed out of the chute made up of the second plate.

A third aspect of the present invention is a granular material handling apparatus according to the first or second aspect of the present invention, which comprises a plate member made of an elastic member, and collides with a conveyed object sent out from the belt conveyor in the hollow portion of the chute. It is characterized by having a damping body arranged in position.
The third invention configured as described above has the same effects as those of the first or second invention described above. Furthermore, in the third invention, the buffer has the effect of preventing the goods fed into the chute from the belt conveyor from coming into direct contact with the inner surface of the chute body, thereby protecting the inner surface of the chute body.
Furthermore, the buffer has the effect of attenuating the kinetic energy of the conveyed article sent out from the belt conveyor to facilitate the free fall.

A fourth aspect of the present invention is a granular material handling apparatus, which is the above-mentioned third aspect of the present invention, and is characterized in that the shock absorber is held in a suspended state and is swingable within the hollow portion of the chute. is.
The fourth invention configured as described above has the same effect as the above-described third invention. Furthermore, in the fourth invention, the buffer is suspended and held and is swingable in the hollow portion, so that the conveyed article sent out in a state of being urged from the belt conveyor collides with the buffer. This has the effect of causing the shock absorber itself to oscillate, thereby more reliably attenuating the kinetic energy of the conveyed object.
Therefore, according to the fourth invention, compared with the case where the shock absorber is fixed and does not swing, there is an effect that the conveyed goods flowing in the chute are more likely to freely fall.

A granular material loading and unloading apparatus according to a fifth aspect of the present invention is any one of the first to fourth aspects of the present invention, wherein the chute body, or the chute body and the buffer when provided with a buffer, is curved. It is characterized by having a shape retainer for holding it in place.
The fifth invention configured as described above has the same effects as those of the first to fourth inventions described above. Furthermore, in the fifth invention, the shape retainer has the function of always retaining the chute body, or the chute body and the shock absorber, which are made of flexible plates, in a state where the plane thereof is curved.
In addition, in the fifth invention, when the material of the shape retainer is a metal containing iron, the shape retainer itself can also act as a weight for keeping the chute body suspended in the vertical direction. .

A sixth aspect of the present invention is a granular material handling apparatus according to any one of the first to fourth aspects of the present invention, comprising a dustproof net erected on the ground so as to surround the chute, Conveyed articles drawn out from the chute are characterized in that they are piled up in a dustproof net.
The sixth invention configured as described above has the same effects as those of the first to fifth inventions described above. Furthermore, in the sixth invention, the dust-proof net has the effect of preventing the dust contained in the material to be conveyed drawn out from the chute from scattering around.

A seventh invention is a granular material handling apparatus according to any one of the first to sixth inventions described above, wherein the chute body, or, in the case of a shock absorber, the chute body and the shock absorber are arranged vertically. It is characterized by having an elevating device for moving up and down.
The seventh invention configured as described above has the same effects as those of the first to sixth inventions described above. Furthermore, in the seventh invention, the lifting device has the action of vertically moving the chute body or the chute body and the buffer body in the vertical direction.

According to the first invention as described above, the chute is provided at the discharge side end of the belt conveyor. It is possible to prevent the dust contained in the transported object from scattering around.
Further, the chute of the first invention is made of a flexible plate and has at least one slit formed along the entire length from the introduction port to the discharge port of the conveyed object. Therefore, even if clogging occurs in this chute, the state can be resolved naturally. More specifically, when a clog occurs in the chute, the hollow portion of the chute main body is widened to a desired diameter by the weight of the conveyed object itself by further supplying the conveyed object to that portion. . With such an operation of the chute body, the clogged object in the chute body loses its support and falls vertically downward, thereby clearing the clogging in the chute.
As described above, according to the first invention, even if the chute is clogged by the articles to be conveyed from the belt conveyor, the chute itself is deformed, so that the clogging can be naturally resolved.
Furthermore, when the material conveyed by the belt conveyor contains moisture, part of the material may adhere to the inner surface of the chute body. In such cases, it becomes necessary to clean the inner surface of the chute body as necessary. Alternatively, it may be necessary to check the state of deterioration of the inner surface of the chute body. In such a case, according to the first invention, a jig for maintenance can be inserted through the slit formed in the chute. Therefore, according to the first invention, it is possible to easily clean the inner surface of the chute body and check the state of deterioration without removing the chute from the support frame integrated with the belt conveyor.
Therefore, according to the first invention, the clogging of the chute itself can be eliminated naturally, and the inner surface of the chute can be cleaned and maintained without removing or disassembling the chute. can.
In addition, in the first invention, the chute body is made of an elastic member and has flexibility, so that when a conveyed object sent out from the belt conveyor collides with the chute body, the chute body is broken by the impact. Temporarily transform. At this time, the kinetic energy of the article collided with the chute body is greatly attenuated, and the article freely falls inside the chute. As a result, it is possible to prevent the articles to be conveyed from the outlet of the chute from scattering in the circumferential direction of the outlet.

The second invention has the same effects as those of the first invention described above. Further, according to the second aspect of the invention, the portion of the second plate projecting vertically upward from the upper end position can guide the article sent out from the belt conveyor into the hollow portion of the chute.
Therefore, according to the second invention, it is possible to more reliably prevent the articles sent out from the belt conveyor and the dust contained therein from scattering outside the chute. As a result, according to the second invention, it is possible to provide a granular material handling apparatus in which scattering of dust is less likely to occur than in the first invention.
Furthermore, according to the present invention, wear and damage of the chute body at the portion directly colliding with the articles sent out from the belt conveyor tend to progress. On the other hand, in the second invention, since the chute main body is composed of two plates (the first plate and the second plate), only plates that are severely worn or damaged are required. can be replaced accordingly. Therefore, according to the second invention, the cost required for replacing the chute body can be reduced.

The third invention has the same effect as the first or second invention described above. Furthermore, in the third invention, the flexible cushioning body made of an elastic member disposed in the hollow portion of the chute can receive the conveyed article sent out from the belt conveyor and attenuate its kinetic energy. . As a result, according to the third aspect of the invention, it is possible to prevent rapid wear or damage to only the localized inner surface of the chute body due to the goods sent out from the belt conveyor. Therefore, according to the third invention, it is possible to improve the durability of the chute body as compared with the first or second invention.
Furthermore, according to the third invention, the kinetic energy of the article sent out from the belt conveyor can be efficiently attenuated by the collision with the buffer. As a result, the article to be conveyed smoothly falls freely in the chute. As a result, in the third invention, it is possible to prevent the articles to be conveyed from the outlet of the chute from scattering in the circumferential direction of the outlet.
Therefore, according to the third invention, compared with the first or second invention, it is possible to provide a granular material handling apparatus in which wear and deterioration of the chute body are less likely to occur and dust is less likely to scatter. can.

The fourth invention has the same effect as the third invention described above. Furthermore, according to the fourth invention, the effect of damping the kinetic energy of the conveyed object can be further enhanced compared to the case where the shock absorber does not oscillate. As a result, in the fourth invention, the article to be conveyed that has collided with the buffer can be allowed to freely fall vertically downward more smoothly.
Therefore, according to the fourth invention, compared with the third invention, it is possible to more reliably prevent the articles discharged from the outlet of the chute from scattering in the circumferential direction of the outlet. .

The fifth invention has the same effects as those of the first to fourth inventions described above. Furthermore, in the fifth invention, the chute main body or the chute main body and the shock absorber are provided with a shape retainer, so that the outer shape of the chute can be retained in a cylindrical shape. In this case, the width of the slit formed in the chute can be reduced while increasing the volume of the hollow portion of the chute. As a result, it is possible to prevent the articles from jumping out of the chute through the slits formed in the chute while improving the fluidity of the articles to be conveyed in the chute.
In particular, when the shape retainer is made of a metal containing iron, the shape retainer can be used as a weight for keeping the chute main body suspended in the vertical direction. In this case, the desired shape can be maintained without impairing the deformability of the chute body simply by attaching the shape retainer to the chute body. As a result, according to the fifth aspect, it is possible to provide a granular material handling apparatus having a simple structure and excellent functions.

The sixth invention has the same effect as each of the first to fifth inventions described above. Furthermore, the sixth invention is provided with a dustproof net, and by stacking the conveyed objects in this dustproof net, the dust in the conveyed objects drawn out from the chute reaches the ground where it is stored. During this time, it can be prevented from being carried around by the wind and scattered around.
Therefore, according to the sixth invention, when the cargo is piled up on the ground using the granular material handling apparatus of the sixth invention in a windy environment, the dust contained in the cargo is transported. It is possible to prevent scattering around the storage place of things.

The seventh invention has the same effect as each of the first to sixth inventions described above. Furthermore, the seventh aspect of the invention is equipped with a lifting device, so that replacement work and maintenance work can be performed on the ground after moving the chute body or the chute body and the shock absorber to the ground.
According to the seventh invention, there is no need for the operator to replace or maintain the chute main body or the chute main body and the buffer body at a high place.
Therefore, according to the seventh invention, it is possible to improve the safety during the work of the worker who performs the repair or maintenance.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing of the principal part of the granular material handling apparatus which concerns on Example 1 of this invention. 1 is a partial perspective view of a chute body in a granular material handling apparatus according to Embodiment 1 of the present invention; FIG. (a) is a cross-sectional view showing a state in which an object is clogged in the chute according to the first embodiment of the present invention; FIG. 2C is a cross-sectional view showing a state in which dust is accumulated, and (c) is a cross-sectional view showing how clogging in the chute according to the first embodiment of the present invention is cleared. 1 is a perspective view of a first plate and its support structure in the granular material handling apparatus according to Example 1 of the present invention; FIG. It is a perspective view of the 2nd plate body and its support structure in the granular material handling apparatus which concerns on Example 1 of this invention. Fig. 2 is a cross-sectional view of a main part of a granular material handling apparatus according to Example 2 of the present invention; FIG. 7 is a partial perspective view of a chute main body and a cushioning body in the granular material handling apparatus according to Embodiment 2 of the present invention; It is a perspective view of a buffer and its support structure in the granular material handling apparatus according to Embodiment 2 of the present invention. It is a side view of the granular material handling apparatus which concerns on Example 3 of this invention.

A granular material handling apparatus according to an 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 a granular material handling apparatus according to Embodiment 1 of the present invention. Moreover, FIG. 2 is a partial perspective view showing an excerpt of the chute main body in the granular material handling apparatus according to the first embodiment of the present invention.
As shown in FIG. 1, the powdery and granular material handling apparatus 1A according to the first embodiment includes a belt conveyor 2 and a powdery or granular material conveyed by the belt conveyor 2 provided at the discharge side end 2a of the belt conveyor 2. It is provided with a chute 4 for receiving a shaped article 3 and guiding it vertically downward. In this figure, for the sake of convenience, the material to be conveyed 3 is illustrated as a solid material having a diameter larger than that of the granular material.
In addition, as shown in FIGS. 1 and 2, the chute 4 according to the first embodiment is formed by bending flexible plates (first plate 5a and second plate 5b) made of elastic members. and at least one slit 6 formed over the entire length of the chute 4 from the inlet 4a to the outlet 4b.
Furthermore, the upper end of the chute body 5, that is, the upper end 4c ₁ of the first plate 5a and the upper end 4c ₂ of the second plate 5b are integrated with the belt conveyor 2 in a support frame (for example, the support frame 7a and the support frame 7b).
In the chute 4 of the granular material handling apparatus 1A according to the first embodiment, the width A (see FIG. 1) of the slit 6 can be expanded as desired because the chute main body 5 is made of an elastic member. can.

According to the chute 4 of the powder and granular material handling apparatus 1A according to the first embodiment as described above, even if the hollow part 18 of the chute 4 is clogged with the material to be conveyed 3, the clogging is naturally resolved. can do.
This mechanism will be described in detail with reference to FIG.
FIG. 3(a) 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. FIG. 2C is a cross-sectional view showing a state in which conveyed articles are accumulated in the chute, and FIG. The same parts as those shown in FIGS. 1 and 2 are denoted by the same reference numerals, and descriptions of their configurations are omitted.
In general, the state of the article 3 conveyed by the belt conveyor 2 is not uniform, and the dust content and moisture content may be high. In this case, the material 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 material 3 as shown in FIG. 3(a). may occur.

In the granular material handling apparatus 1A according to the first embodiment, when the articles 3 continue to be fed into the chute 4 from the state shown in FIG. The weight expands the diameter of the hollow portion 18 of the chute 4 in its circumferential direction (see FIG. 3(b)). At this time, the width A (see FIG. 3(a)) of the slit 6 in the chute 4 of the granular material handling apparatus 1A according to the first embodiment expands to the width A' (see FIG. 3(b)).
When the diameter of the hollow portion 18 of the chute 4 expands in the circumferential direction as shown in FIG. 3, the objects 3 accumulated in the chute 4 lose their support and fall vertically downward due to their own weight (see FIG. 3(c)). As a result, the clogging of the material 3 in the chute 4 according to the first embodiment is eliminated.
Therefore, according to the granular material handling apparatus 1A having the chute 4 according to the first embodiment, when the chute 4 is clogged with the conveyed material 3, the clogging can be resolved without human intervention. Therefore, according to the granular material handling apparatus 1A according to the first embodiment, the cost required for maintenance and management can be reduced.

In the granular material handling apparatus 1A according to the first embodiment, the material of the first plate 5a that constitutes the chute 4 is a plate that is an elastic member and has flexibility. A rubber plate can be used without any trouble, and a rubber plate is particularly suitable.
Further, in the granular material handling apparatus 1A according to the first embodiment, although not shown, the flexible plate (chute main body 5) made of one elastic member is curved into a tubular shape, and the curved A chute 4 having one slit 6 formed by separating end surfaces of a plate that are arranged close to each other by a width A can be used. Also in this case, the same effects as those described above can be exhibited.

On the other hand, as shown in FIGS. 1 and 2, in the granular material handling apparatus 1A according to the first embodiment, the chute body 5 is composed of two flexible first plates 5a and 5a. It may be configured by the second plate 5b.
In this case, as shown for example in FIGS. In addition, the second plate 5b, which is the other plate, may be placed at a position facing the first plate 5a and on the belt conveyor 2 side. In addition, the code|symbol C described in FIG. 2 has shown the delivery direction (conveyance direction) of the conveyed goods 3. As shown in FIG.
In this case, by providing the chute 4 with two slits 6, the deformability of the hollow portion 18 of the chute 4 is improved compared to the case where the chute 4 is configured by a flexible plate made of a single elastic member. can be made As a result, when clogging occurs in the chute 4, the effect of naturally resolving the clogging is more likely to be exhibited.

In particular, when the chute main body 5 is composed of two flexible plates (the first plate 5a and the second plate 5b) made of elastic members, and the positional relationship of these plates is shown in FIG. As shown in 1 and 2, in the case of arranging the article 3 so as to be forward and backward with respect to the moving direction of the conveyed object 3, the position of the upper end _4c of the first plate 5a is further replaced by the upper end 4c of the second plate 5b. It may be arranged vertically above _{the second} position.
In this case, in the region on the side of the upper end _4c1 of the first plate 5a that protrudes vertically above the position of the upper end _4c2 of the second plate 5b, the article 3 sent out by the belt conveyor 2 is received and shot. 4 can be guided into the cavity 18 .
Therefore, when using the chute 4 in which the position of the upper end _4c1 of the first plate 5a is higher than the position of the upper end _4c2 of the second plate 5b, the object 3 conveyed by the belt conveyor 2 is placed on the chute 4 can be prevented from dissipating out of the

Furthermore, the chute body 5 (for example, the first plate 5a and the second plate 5b) according to the first embodiment includes a shape retainer 9 for holding the chute body 5 in a curved state. may be
Such a shape retainer 9 includes, for example, a pair of curved band-like shape retention frames 9a, 9a and a bolt 9b for detachably integrating the pair of shape retention frames 9a, 9a. and a nut 9c.
1 and 2, such a shape-retaining tool 9 has a first plate 5a or a second plate 5b interposed between a pair of shape-retaining frames 9a, 9a, and further A bolt 9b is inserted through the overlapping portion of the first plate 5a or the second plate 5b and the paired shape-retaining frames 9a, 9a, and its end is fixed with a nut 9c. .
As shown in FIGS. 1 and 2, a plurality of sets of shape retainers 9 are provided on the first plate 5a and the second plate 5b at desired intervals so that the first plate 5a It is possible to deform the first plate 5a and the second plate 5a and the second plate 5b so as to be able to restore while maintaining the curved three-dimensional shape of the second plate 5b.

In particular, in the chute 4 according to the first embodiment, when the shape retainer 9 is made of a metal containing iron, the shape retainer 9 is arranged vertically between the first plate 5a and the second plate 5b. It can also be used as a weight to keep it hanging.
In this case, when the chute 4 is used, the chute main body 5 (for example, the first plate 5a and the second plate 5b) is deformed as necessary, and the deformed chute main body 5 is placed under the load of the shape retainer 9. can be used to quickly restore the original curved shape.
Therefore, when the shape retainer 9 is made of a metal containing iron, there is no need to provide the chute 4 with a separate member or structure for restoring the deformed chute main body 5 to its original shape. As a result, the structure of the chute 4 according to the first embodiment can be simplified, so that installation and maintenance costs can be reduced.

In addition, in the granular material handling apparatus 1A according to the first embodiment, the chute 4 is provided with at least one slit 6 over the entire length thereof. Part of the conveyed article 3 does not leak out from the slit 6 even when the liquid flows.
This is because the ejector effect is exhibited in the slit 6 by the action of the material 3 flowing in the hollow portion 18 of the chute 4 . That is, as the material 3 flows in the hollow portion 18 of the chute 4, the speed of the air flow in the hollow portion 18 increases, and the dynamic pressure becomes higher and the static pressure lower than that of the static outside air. , the outside air flows into the hollow portion 18 of the chute 4 through the slit 6 . Therefore, when the article 3 freely falls in the chute 4 , the article 3 does not leak through the slit 6 .
In order to ensure that the slit 6 formed in the chute 4 exhibits the ejector effect as described above, the width A (see FIG. 1) of the slit 6 with respect to the maximum width B (see FIG. 2) of the chute 4 ) must be set to 10% or less.

Further, in the granular material handling apparatus 1A according to the first embodiment, the greater the initial velocity V of the goods 3 discharged from the discharge port 4b of the chute 4, the more time it takes for the goods 3 to reach the ground from the discharge port 4b. In addition, the dust contained in the conveyed article 3 is less likely to scatter around.
Furthermore, since the conveyed article 3 sent out from the belt conveyor 2 mainly free-falls in the chute 4, the initial velocity V of the conveyed article 3 at the exit 4b of the chute 4 is the length of the chute 4, i.e., the length of the chute 4. The longer the length L (see FIG. ₁ ) from the position of the upper end 4c1 of the first plate 5a to the lead-out port 4b, the faster.
Therefore, in the granular material handling apparatus 1A according to the first embodiment, by appropriately adjusting the length L from the position of the upper end 4c ₁ of the first plate 5a to the outlet 4b, the powder is discharged from the outlet 4b. It is possible to more reliably suppress scattering of dust contained in the conveyed object 3 to the surroundings.

More specifically, in the granular material handling apparatus 1A according to the first embodiment, the upper end of the first plate 5a is adjusted so that the initial velocity V of the conveyed object 3 at the outlet 4b of the chute 4 is 7 m/sec or more. 4c It is preferable to set the length L from _{the 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 article 3 at the exit 4b of the chute 4 is 8 m/sec or more, more preferably 9 m/sec or more. Good.
In addition, the inventor believes that the length L of the chute 4 (see FIG. 1) must be at least 4.6 m in order to make the initial velocity V of the conveyed product 3 at the exit 4b of the chute 4 9.5 m/sec or more. I'm sure there is
On the other hand, although the upper limit of the length L of the chute 4 according to the first embodiment may not be set in particular, the shorter the length L, the more the cost required to procure the first plate 5a and the second plate 5b. can be made inexpensively. Therefore, it is desirable that the length L of the chute 4 according to the first embodiment is 5 m or less.

Next, a support structure for the first plate 5a and the second plate 5b will be described with reference to FIGS.
FIG. 4 is a perspective view of a first plate and its support structure in the granular material handling apparatus according to Example 1 of the present invention. Moreover, FIG. 5 is a perspective view of the second plate and its support structure in the granular material handling apparatus according to the first embodiment of the present invention. The same parts as those shown in FIGS. 1 to 3 are denoted by the same reference numerals, and descriptions of their configurations are omitted. 4 and 5, illustration of the bolt 9b and the nut 9c in the shape retainer 9 is omitted.
As shown in FIG. 4, the support structure for the first plate 5a that constitutes the chute 4 according to the first embodiment is, for example, the shape retainer 9 provided at the upper end _4c1 of the first plate 5a. More specifically, it may be composed of a hanging frame 14a fixed to the shape holding frame 9a of the shape holding fixture 9 and a support shaft 15a fixed to the upper end of the hanging frame 14a.
The support shaft 15a in the support structure for the first plate 5a as described above is mounted on the support frames 7a and 7a integrated with the belt conveyor 2 as shown in FIG. The body 5 a can be fixed in the vicinity of the belt conveyor 2 .
In addition, in the support structure for the first plate 5a as described above, the reinforcing member 17 may be arranged in a sash pattern on the suspension frame 14a. In this case, the strength of the suspension frame 14a can be increased.
It should be noted that the support structure of the first plate 5a does not need to be specified as shown in FIG. 4, and a structure other than that shown in FIG. may be adopted.
Further, as shown in FIG. 4, the first plate 5a and its supporting structure (suspension frame 14a, support shaft 15a, etc.) are detachably attached to the support frames 7a, 7a integrated with the belt conveyor. may be set.
In this case, the first plate 5a can be removed together with its support structure from the support frames 7a, 7a. As a result, the first plate 5a and its support structure removed from the support frames 7a, 7a can be moved to the ground, and maintenance and replacement work can be performed on the ground. As a result, maintenance work for the granular material handling apparatus 1A according to the first embodiment can be facilitated.

Further, the support structure for the second plate 5b that constitutes the chute 4 according to the first embodiment includes, for example, as shown in FIG. More specifically, the shape-retaining frame 9a may be provided with a sling 20 and a hollow tube 19 fixed to the sling 20, and the support shaft 15b may be inserted through the hollow tube 19. .
Then, the support shaft 15b in the support structure for the second plate 5b as described above is mounted on the support frames 7b, 7b integrated with the belt conveyor as shown in FIG. 5b can be fixed in the vicinity of the belt conveyor 2. FIG.
It should be noted that the support structure of the second plate 5b does not need to be specified as shown in FIG. Other structures may be employed.

Further, as shown in FIG. 5, the second plate 5b and its supporting structure (suspension frame 14b, support shaft 15b, etc.) are detachably attached to the support frames 7b, 7b integrated with the belt conveyor. may be set.
In this case, the second plate 5b can be removed together with its support structure from the support frames 7b, 7b. As a result, the second plate 5b and its support structure removed from the support frames 7a, 7a can be moved to the ground, and maintenance and replacement work can be performed on the ground. As a result, maintenance work for the granular material handling apparatus 1A according to the first embodiment can be facilitated.
Furthermore, when the hanger 20 and the hollow tube 19 are used as a support structure for the second plate 5b, the support shaft 15b can be installed while being brought close to the upper end _4c2 of the second plate 5b.
In this case, as shown in FIG. 1, the second plate 5b can be installed in a state of being close to the discharge side end 2a of the belt conveyor 2. As shown in FIG. As a result, it is possible to prevent the articles 3 sent out from the discharge side end 2a of the belt conveyor 2 from failing to enter the hollow portion 18 of the chute 4 and being dispersed to the surroundings.

Next, a granular material handling apparatus according to a second embodiment of the present invention will be described in detail with reference to FIGS. 6 to 8. FIG.
FIG. 6 is a cross-sectional view of a main part of a granular material handling apparatus according to Embodiment 2 of the present invention. Moreover, FIG. 7 is a partial perspective view of the chute main body and the shock absorber in the granular material handling apparatus according to the second embodiment of the present invention. The same parts as those shown in FIGS. 1 to 5 are denoted by the same reference numerals, and descriptions of their configurations are omitted.
In the granular material handling apparatus 1B according to the second embodiment of the present invention, as shown in FIG. A buffer body 8 made of a plate having
In this case, since the cushioning member 8 is provided in the hollow portion 18 of the chute 4, the conveyed article 3 sent out from the belt conveyor 2 is prevented from contacting the inner surface of the first plate 5a, which is the inner surface of the chute 4. Avoid direct contact. As a result, it is possible to prevent wear and damage on the inner surface of the chute 4 from progressing rapidly, so that the useful life of the chute 4 can be lengthened.

Further, as shown in FIG. 6, when the chute 4 is provided with a flexible buffer 8 made of an elastic member, the goods 3 sent out from the belt conveyor 2 into the hollow portion 18 of the chute 4 are placed in the buffer. By colliding with 8 and deforming this buffer 8, the kinetic energy of the conveyed object 3 can be attenuated. As a result, the conveyed article 3 that has collided with the buffer 8 flows vertically downward in the hollow portion 18 of the chute 4 in a nearly free-falling state.
Therefore, in the granular material handling apparatus 1B according to the second embodiment, when the conveyed article 3 sent out from the belt conveyor 2 in a state of being urged is led out from the outlet 4b of the chute 4, the conveyed article 3 is There is almost no kinetic energy to diffuse in the circumferential direction of outlet 4b. Therefore, it is possible to more reliably prevent the dust contained in the article 3 from scattering around the chute 4 .

Further, in the granular material handling apparatus 1B according to the second embodiment, the cushioning bodies 8 accommodated in the hollow portion 18 of the chute 4 are, as shown in FIGS. A shape retainer 9 may be provided in the same manner as the plate 5b. In this case, the three-dimensional shape can be kept curved while maintaining the deformability of the buffer body 8 .
In this case, the horizontal cross section of the cushioning body 8 inside the hollow portion 18 of the chute 4 is curved. As a result, the objects 3 collided with the inner surface of the buffer 8 (the surface on which the objects 3 collide) and rebounded, and further collide with each other. As a result, the kinetic energy of the objects 3 can be attenuated not only by the objects 3 colliding against the buffer 8 but also by the objects 3 colliding with each other.
Therefore, when the cushioning body 8 is provided with the shape retainer 9, the effect of attenuating the kinetic energy of the conveyed object 3 can be further improved compared to the case where the shape retainer 9 is not provided.

Furthermore, in the granular material handling apparatus 1B according to the second embodiment, when the shape retainer 9 attached to the buffer 8 is made of a metal containing iron, the shape retainer 9 itself can be replaced by the buffer 8. It can be used as a weight to keep it 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 granular material handling apparatus 1B according to the second embodiment can be reduced.

Here, the support structure of the damping body 8 will be described in detail with reference to FIG. 8 .
FIG. 8 is a perspective view of a shock absorber and its support structure in a granular material handling apparatus according to Example 2 of the present invention. The same parts as those shown in FIGS. 1 to 7 are denoted by the same reference numerals, and descriptions of their configurations are omitted.
The support structure for the buffer body 8 according to the second embodiment is similar to the support structure for the first plate body 5a shown in FIG. More specifically, it may be composed of a suspension frame 14b fixed to the shape retention frame 9a of the shape holder 9 and a support shaft 15c fixed to the upper end of the suspension frame 14b.
The support shaft 15c of the support structure for the buffer 8 as described above is installed on the support frames 7a and 7a integrated with the belt conveyor as shown in FIG. It can be fixed in a suspended state within the portion 18 .

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

Further, in the granular material handling apparatus 1</b>B according to the second embodiment, the shock absorber 8 may be made swingable within the hollow portion 18 of the chute 4 by suspending and holding the shock absorber 8 inside the chute 4 .
In this case, when the article 3 sent out from the belt conveyor 2 collides with the buffer 8, the shock can cause the buffer 8 to swing. At this time, the kinetic energy of the conveyed object 3 is consumed not only by the deformation of the cushioning body 8 itself but also by the rocking of the cushioning body 8 itself. As a result, the effect of attenuating the kinetic energy of the conveyed object 3 can be increased compared to the case where the buffer 8 does not oscillate.
As a result, the conveyed article 3 after colliding with the buffer 8 can be free-falled more reliably. Therefore, it is possible to more reliably prevent the dust contained in the article 3 sent out from the belt conveyor 2 from scattering around.

Furthermore, in the granular material handling apparatus 1B according to the second embodiment, the shock absorber 8 directly contacts (collides) with the article 3 sent out from the belt conveyor 2, so that the first plate 5a and the second plate 5b It is expected that the wear and damage will be more severe compared to .
For this reason, there is a possibility that a part of the flexible plate of the cushioning body 8 according to the second embodiment is torn off and falls together with the conveyed object 3 during use.
In addition, when the cushioning body 8 according to the second embodiment is provided with a shape-retaining tool 9 made of metal, part of the cushioning body 8 provided with the shape-retaining tool 9 is torn and piled up in the conveyed goods 3 It is not desirable to leave it mixed with
In view of such circumstances, in the granular material handling apparatus 1B according to the second embodiment, even if a part of the buffer body 8 is torn during use of the buffer body 8, the torn buffer body The shock absorber 8 may be provided with a fall prevention tool 13 so that the shock absorber 8 does not fall together with the transported article 3 .

More specifically, as shown in FIGS. 7 and 8, a shape retainer 9 made of a metal wire or chain and attached to the upper end 8a side of the damping body 8 and the lower end 8b side of the damping body 8 A fall prevention tool 13 may be provided so as to connect the shape holding tool 9 attached to.
In this case, even if the cushioning body 8 should be cut off at its intermediate position, the fragments of the cushioning body 8 are held in a state of being suspended by the fall prevention tool 13 . As a result, it is possible to prevent fragments of the torn cushioning body 8 from falling together with the transported article 3 .
Therefore, since the cushioning body 8 according to the second embodiment is provided with the fall prevention tool 13, a part of the cushioning body 8 and the shape retainer 9 may fall into the conveyed object 3 during use of the granular material handling apparatus 1B. It can prevent contamination. As a result, the quality of the goods 3 conveyed by the granular material handling apparatus 1B according to the second embodiment can be maintained at a high level.

Furthermore, in the granular material handling apparatus 1B according to the second embodiment, as described above, the chute 4 itself is composed of flexible plates (for example, the first plate 5a and the second plate 5b). there is Therefore, if the impact applied to the shock absorber 8 is particularly large when the transported object 3 collides, there is a possibility that the first plate 5a together with the shock absorber 8 will be pushed out to 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 may become wider than necessary, and the ejector effect described above may not be exhibited.
In view of such circumstances, in the granular material handling apparatus 1B according to the second embodiment, even when a force that pushes the first plate 5a together with the buffer 8 toward the outer surface side of the chute 4 acts, An anti-deformation member 12 may be provided to resist this force and keep the cushion 8 in its original position.

More specifically, the deformation-preventing member 12 as described above may be a plurality of rod-shaped bodies suspended vertically between the inner surface of the chute 4 and the buffer 8 .
In this case, the fall prevention device 13 can restrict the movement of the cushioning body 8 that is pushed out to the outer side of the chute 4 due to the collision with the conveyed object 3 .
In other words, even if the shock absorber 8 is configured to swing toward the outside of the chute 4 upon collision with the conveyed article 3, the pressing force of the conveyed article 3 sent out from the belt conveyor 2 causes the shock absorber 8 to move toward the chute. 4 can be prevented from being pushed out to the outer surface side.
Therefore, since the granular material handling apparatus 1B according to the second embodiment includes the cushioning body 8 having the deformation preventing material 12, it is possible to prevent the slit 6 from unintentionally widening when the chute 4 is used.
As a result, when the chute 4 is used in the granular material handling apparatus 1B according to the second embodiment, it is possible to prevent the dust contained in the conveyed object 3 from scattering outside through the slits 6 of the chute 4 .

6 to 8, the case where the deformation preventing member 12 is attached to the shape retaining member 9 provided on the upper end 8a side of the cushioning body 8 is described as an example, but the deformation preventing member 12 is attached The structure need not be specific to the structure shown in FIGS. 6-8.
More specifically, for example, a support member (not shown) is bridged between the support structure (eg, suspension frame 14a) of the first plate 5a and the support structure (eg, suspension frame 14b) of the buffer 8. A deformation prevention member 12 may be attached to the support member.

Further, the deformation preventing member 12 interposed between the chute 4 and the buffer 8 in the powdery material handling apparatus 1B according to the second embodiment is the shape retaining tool 9 (for example, the shape retaining frame 9a) or the above-mentioned (not shown) It may be fixed to the support member, or it may be attached so as to be able to swing relative to its attachment target.
In this case, the kinetic energy of the conveyed object 3 can be attenuated by swinging the deformation preventing member 12 in addition to swinging the buffer 8 .
Therefore, compared with the case where the deformation preventing member 12 does not swing, the kinetic energy of the conveyed object 3 can be more reliably attenuated. As a result, it is possible to more reliably decelerate the transported object 3 after colliding with the buffer 8, so that the free fall is facilitated. As a result, it is possible to more reliably prevent the dust contained in the article 3 led out from the outlet 4b of the chute 4 from scattering around.

Moreover, the shape of the deformation preventing member 12 may be a simple rod, or a chain as shown in FIGS. In other words, the deformation preventing member 12 itself may have deformability capable of being restored by its own weight.
In this case, in addition to swinging the deformation preventing member 12, the kinetic energy of the conveyed object 3 can be attenuated by deforming the deformation preventing member 12 itself.
In this case, compared with the case where the deformation preventing member 12 is a simple rod, the effect of attenuating the kinetic energy of the conveyed object 3 can be further enhanced.
As a result, the kinetic energy of the conveyed object 3 can be further reduced as compared with the case where the deformation preventing member 12 only swings and does not deform. Therefore, it is possible to more reliably prevent the scattering of dust from the material 3 flowing in the chute 4 .

It should be noted that the material of the deformation preventing member 12 is desirably a metal, and desirably a heavy metal containing iron.
In this way, by forming the deformation preventing member 12 from a heavy material, it is possible to prevent the cushioning member 8 and the first plate member 5a from being largely displaced from their original positions due to the pressing force of the flowing conveyed object 3. be able to. This can prevent the width A of the slit 6 of the chute 4 from unintentionally widening.
In addition to these effects, the effect of decelerating the goods 3 sent out from the belt conveyor 2 also increases.
Therefore, when the chute 4 has the cushioning body 8 provided with the deformation preventing material 12 made of a heavy metal containing iron, it is possible to provide the granular material handling apparatus 1B with particularly excellent dustproof performance.

Next, a granular material handling apparatus according to Embodiment 3 of the present invention will be described in detail with reference to FIG.
FIG. 9 is a side view of a granular material handling apparatus according to Embodiment 3 of the present invention. The same parts as those shown in FIGS. 1 to 9 are denoted by the same reference numerals, and descriptions of their configurations are omitted.
According to the granular material handling apparatuses 1A and 1B according to the first and second embodiments, the conveyed material 3 sent from the belt conveyor 2 passes through the chute 4 and is discharged from the discharge port 4b. Dust generation from the object 3 can be efficiently prevented.
On the other hand, the granular material handling apparatuses 1A and 1B according to Examples 1 and 2 are usually installed outdoors. Therefore, even if it is possible to prevent dust from being generated from the conveyed object 3 when it passes through the chute 4, depending on the outdoor weather conditions, before the conveyed object 3 reaches the ground from the exit 4b of the chute 4, There was a concern that the dust contained in the conveyed object 3 would be scattered around by the wind.
In view of such circumstances, the powdery material handling apparatus 1C according to the third embodiment includes a dustproof net 10 erected on the ground so as to surround the chute, as shown in FIG. good too.
In this case, in the granular material handling apparatus 1</b>C according to the third embodiment, the articles 3 led out from the chute 4 are piled up inside the dustproof net 10 .
As described above, when the granular material handling apparatus 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 scattering around. can.

The height _H1 from the ground 11 to the top 10a of the dustproof net 10 is preferably higher than the distance _H2 from the ground 11 to the outlet 4b of the chute 4 (see FIG. 9).
However, the higher the height _H1 of the dust-proof net 10, the higher the construction cost, and the higher the risk of the dust-proof net 10 collapsing in a strong wind. Therefore, it is preferable that the height _H1 of the dustproof net 10 is as low as possible.
In view of such circumstances, in the granular material handling apparatus 1C according to the third embodiment, as shown in FIG. That is, it is preferable to set the angle θ between the straight line connecting the side end of the chute 4 and the vertical line from the side end to be within the range of 60 to 75 degrees.
In this case, even if the distance _H2 from the ground 11 to the discharge port 4b of the chute 4 is higher than the height _H1 from the ground 11 to the top 10a of the dust-proof net 10, the dust in the conveyed object 3 will reach the dust-proof net 10. can be made difficult to disperse beyond
In this case, furthermore, in the granular material handling apparatus 1C according to the third embodiment, it is possible to reduce the cost required for installing the dustproof net 10 and reduce the risk of the dustproof net 10 collapsing due to strong winds.

Further, although not shown in particular, each of the granular material handling apparatuses 1A to 1C according to the present invention, in addition to the above-described configuration, includes a chute body 5 (for example, a first plate 5a and a second plate 5b), Alternatively, when a buffer is provided in addition to the chute body 5, an elevating device (not shown) for vertically moving the chute body 5 and the buffer 8 may be provided.
More specifically, a winch or the like can be used as such a lifting device.
Thus, when the granular material handling apparatus 1A to 1C according to the present invention is provided with a lifting 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. can.
In this case, maintenance or replacement work for the chute body 5 or, if the shock absorber 8 is provided, the chute body 5 and the shock absorber 8 need not be performed at a dangerous high place. Therefore, in the granular material handling apparatus 1A to 1C according to the present invention, the chute main body 5, or when the buffer 8 is provided, the chute main body 5 and the buffer 8 can be detachably attached to the support frame integrated with the belt conveyor. It is possible to provide a granular material handling apparatus that is excellent in safety by being attached and provided with a lifting device (not shown).

Furthermore, when the granular material handling apparatus 1A to 1C according to the present invention includes, for example, a winch as a lifting device, the chute main body 5, or when the buffer 8 is provided, the chute main body 5 and the buffer 8 should be handled. For ease of operation, the support shafts 15a and 15b and the hollow tube 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, the chute main body 5 or, in the case where the shock absorber 8 is provided, the chute main body 5 and the shock absorber 8 can be moved up and down efficiently and safely.
4, 5, and 8, each support structure in each of the chute main body 5, the chute main body 5, and the buffer 8 is provided for stability during suspension and in case the hooking portion 16 is damaged. Although the case where three hooking portions 16 are provided is described as an example, two hooking portions 16 may be provided for each support structure.
Further, the hooking portion 16 is not necessarily required, and a chain or the like may be wound around the support shafts 15a to 15c to suspend and hold them so that they can be raised and lowered.

It should be noted that although not shown, the granular material handling apparatus 1A to 1C according to the present invention including the belt conveyor 2 is provided with a cover and scaffolding for maintenance and inspection.
Furthermore, the granular material handling apparatus 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. As shown in FIG.
Since the granular material handling apparatus 1A to 1C according to the present invention includes 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 keep the three-dimensional shape of the chute 4 cylindrical. As a result, even when the granular material handling apparatus 1A to 1C according to the present invention is used in a strong wind environment, it is possible to prevent dust from leaking out from the slits 6. FIG.

In addition, in the granular material handling apparatus 1A to 1C according to the present invention, the shape retainer 9 is molded so that the horizontal cross-sectional shape of the chute 4 forms a streamlined shape that decreases in diameter toward the slit 6. good too.
In this case, depending on the direction of the wind flowing around the chute 4, the wind pressure acting on the chute 4 can be reduced.
As a result, when the granular material handling apparatus 1A to 1C according to the present invention is 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 granular material handling apparatus 1A to 1C according to the present invention configured as described above, it is possible to provide a granular material handling apparatus excellent in weather resistance.

INDUSTRIAL APPLICABILITY As described above, the present invention can prevent the dust contained in the conveyed materials from scattering around when conveyed materials made of powder and granular material are sent out from a belt conveyor and piled up, and can prevent clogging of the chute. It is a granular material handling equipment that can naturally resolve the situation when a problem occurs, and can perform maintenance and inspection from the outside without removing the chute. available in the field.

DESCRIPTION OF SYMBOLS 1A-1C... Granular material handling apparatus 2... Belt conveyor 2a... Discharge side end 3... Conveyed object 4... Chute 4a... Inlet 4b... Outlet _4c1 , _4c2 ... Upper end 5... Chute main body 5a... First Plate 5b Second plate 6 Slits 7a, 7b Support frame 8 Buffer 8a Upper end 8b Lower end 9 Shape retainer 9a Shape retainer frame 9b Bolt 9c Nut 10 Dust net 10a Top part 11... Ground 12... Deformation prevention material 13... Drop prevention tool 14a, 14b... Suspension frame 15a, 15b, 15c... Support shaft 16... Hook part 17... Reinforcement material 18... Hollow part 19... Hollow tube 20... Suspension tool 21... Outer cylinder

Claims (3)

A belt conveyor, and a chute that is provided at the discharge side end of the belt conveyor and receives and guides the granular material conveyed by the belt conveyor to the vertically downward side,
The chute is
a cylindrical chute main body formed by bending a plate made of an elastic member and having an upper end fixed to a support frame integrated with the belt conveyor;
a slit formed along the entire length of the chute from the introduction port to the outlet port of the article to be conveyed and having a width that expands as desired;
The chute body is
a first plate disposed on the delivery side of the conveyed object on the belt conveyor;
a second plate disposed opposite to the first plate and disposed on the belt conveyor side;
The slits are provided between the first plate and the second plate, and
The upper end position of the first plate is arranged vertically above the upper end position of the second plate ,
A granular material handling apparatus, comprising: a cushioning body made of a plate made of an elastic member and arranged in a hollow portion of the chute at a position where it collides with the conveyed material sent out from the belt conveyor. 2. A granular material handling apparatus according to claim 1 , wherein said shock absorber is suspended and is swingable within said hollow portion of said chute. 3. The granular material handling apparatus according to claim 1 , wherein said chute main body and said buffer are provided with a shape retainer for retaining a curved shape.

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