JP3058637B1 - Belt conveyor - Google Patents

Abstract

To provide a belt conveyor capable of reducing damage to a conveyor belt. An endless movable transport belt (16) for transporting an article (W) to be transported on a forward road surface section (16a) by traveling.
A drive roller 25 serving as a sandwiching roller is rotatably disposed on the return surface 16b of the transport belt 16 on the lower surface side. Endless contact belts 51a and 51b are disposed on the return path surface portion 16b of the transport belt 16 so as to run in parallel with the transport belt 16 at a position facing the drive roller 25 on the upper surface side. A coil spring 45 as an urging means urges the communication belts 51a and 51b in a direction relatively approaching toward the drive roller 25 side. Conveyor belt 16
Is driven by the driving force from the driving roller 25 by pinching the contact belts 51a and 51b and the driving roller 25 in surface contact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor capable of reducing damage to a conveyor belt.

[0002]

2. Description of the Related Art As a conventional belt conveyor, for example, a belt conveyor described in Japanese Patent Application Laid-Open No. 9-100016 is known.

As shown in FIG. 18, the belt conveyor described in Japanese Patent Application Laid-Open No. 9-100016 is provided with an endless transportable conveyor belt 1, and the transport belt 1 has an outward path surface (not shown) on the upper side. A drive roller 2 whose axial direction coincides with a direction intersecting the traveling direction of the conveyor belt 1 is located on the lower surface side of the return road surface portion continuous with the forward road surface portion, and is separated from and opposed to the upper surface side of the return road surface portion. The pair of receiving rollers 3, 3 are located in parallel with the driving roller 2 so as to face the driving roller 2.

[0004] When the driving roller 2 is urged upward by the urging means 4, the return path surface portion of the transport belt 1 is nipped between the driving roller 2 and the pair of receiving rollers 3, and this nipping is performed. The transport belt 1 travels based on the driving force from the drive roller 2, and as a result, an unillustrated transported object is transported on the outward surface of the transport belt 1.

[0005]

However, in order to properly transmit the driving force from the driving roller 2 to the conveyor belt 1 in the belt conveyor described in the above-mentioned conventional Japanese Patent Application Laid-Open No. 9-100016, the driving roller 2 must be urged with a relatively strong urging force.
Is held between the drive roller 2 and the pair of receiving rollers 3 and 3 in line contact with relatively strong pressure.
There is a problem that the transport belt 1 is easily damaged.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a belt conveyor capable of reducing damage to a conveyor belt.

[0007]

According to a first aspect of the present invention, there is provided a belt conveyor comprising: a pair of frames spaced apart from each other; an endless movable transport belt detachably mounted between the frames; And an endless runnable contact belt disposed so that a surface facing the contact belt runs parallel to the same direction as the transport belt, and rotatable to a position facing the contact belt via the transport belt. And a pinch roller whose axial direction coincides with a direction intersecting the running direction of the contact belt, and at least one of the pinch roller and the contact belt is directed toward at least one of the other side. Urging means for urging in a direction approaching the front side, and both of which are located opposite to each other and whose axial direction coincides with the direction intersecting the traveling direction of the conveyor belt and A pair of rollers around which a contact belt is wound, wherein the pair of rollers are separated from each other by a predetermined distance with the rollers and the pinching roller not sandwiching the transport belt through the contact belt. positioned in either one of the nip roller and the contact belt is removably attached to said frame, one of the removable holding rollers and communicating fault belt can output driving force In the state where any one of the detachable nipping roller and the contact belt is attached,
Are taut with the urging by the urging means is a surface contact manner sandwiched between the contact belt and said nip roller, said winding
Traveling by the driving force from one of the Disconnect possible nip roller and continuous fault belt conveys the conveying object, the said take-up
In a state where one of the clamping rollers and continuous fault belt capable off has been removed, it is made of a loose state from the tension.

In this configuration, the transport belt is sandwiched between the nipping roller and the contact belt in surface contact, and the nipped transport belt travels by driving force from either the nipping roller or the contact belt, The transported object is transported by the transport belt. The transport belt is a contact belt
Or loosened from tension due to removal of pinching roller
The conveyor belt will be in a state when cleaning, replacing, etc.
Frame and can be easily removed from the
The take-up device is omitted by tensioning the conveyor belt by the step.
Since the configuration is omitted, the size can be reduced.

According to a second aspect of the present invention, in the belt conveyor according to the first aspect, the holding roller is a rotatable driving roller whose axial direction coincides with a direction intersecting the traveling direction of the conveyor belt. it is those that.

In this configuration, the urging means urges at least one of the driving roller and the communication belt in a direction relatively approaching at least one of the other sides, and as a result, the transport belt is driven by the driving roller. The contact belt is held in surface contact with the contact belt, and the held conveyor belt travels by the driving force from the drive roller, and the article to be transferred is conveyed by the conveyor belt.

[0011] Belt conveyor according to claim 3, wherein, in the belt conveyor according to claim 2, biasing means, said driving the contact belt by biased toward the at least one driving roller side of the pair of rollers The bias is applied in a direction relatively approaching toward the roller.

In this configuration, the urging means urges at least one of the pair of rollers toward the driving roller, thereby urging the communication belt relatively toward the driving roller. Therefore, the configuration on the driving roller side is simplified.

According to a fourth aspect of the present invention, in the belt conveyor according to the first aspect, the nipping roller is located on one surface side of the transport belt and has an axial direction in a direction intersecting the traveling direction of the transport belt. A pair of rollers are rotatable free rollers, and the pair of rollers are located opposite to each other on the other surface side of the conveyor belt , and each of the rollers coincides with the direction in which the axial direction intersects the traveling direction of the conveyor belt. And a driving roller and a driven roller around which the communication belt is wound , and the urging means connects the free roller to the communication belt.
It is biased in a direction relatively approaching the tilt side .

In this configuration, the urging means is free.
Roller toward the contact belt side
The configuration on the contact belt side is simpler.
You.

[0015] The belt conveyor according to the fifth aspect is characterized by the following.
1. In the belt conveyor as described in 1 , the nipping roller is used for conveying.
The belt is located on one side of the belt and the axial direction is
A rotatable freewheel that corresponds to a direction that intersects the traveling direction
Rollers, and a pair of rollers is
Are located opposite to each other on either side,
Coincides with a direction intersecting the traveling direction of the transport belt and
Drive roller and driven roller around which the contact belt is wound
And the urging means includes the driving roller and the driven
Point at least one of the rollers to the other
The link is biased in a direction in which
Approach the free-roller side
In the direction .

In this configuration, the urging means is driven by the driving roller.
Roller and / or driven roller
To contact the other in the direction of relative separation
Move the belt relatively toward the free roller side
The configuration on the free roller side is simple because of the biasing configuration.
become.

According to a sixth aspect of the present invention, there is provided a belt conveyor.
In the belt conveyor described in 5 , the contact belt is provided in a plurality.
The belts are connected to one side of the conveyor belt.
The running direction is parallel to the running direction of the conveyor belt.
The biasing means are located opposite to each other,
Relatively close to the free roller side
So that it is biased in the direction
A plurality is provided corresponding to the contact belt .

In this configuration, each biasing means corresponds to
To the free roller side.
In the direction of movement of the conveyor belt.
Each contact belt according to the state of the clamped part
Set an appropriate pinching force.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of a belt conveyor according to a first embodiment of the present invention will be described below with reference to FIGS.

In FIGS. 1 to 5, reference numerals 11a and 11b denote a pair of frames on both sides, and the pair of frames 11a and 11b.
“b” has a longitudinal direction in the horizontal direction, and is supported by support legs (not shown) in a state of being opposed to and separated from each other in parallel.

The upper ends of the pair of frames 11a and 11b are connected by an elongated sliding contact plate 12, and the upper surface of the sliding contact plate 12 has a top surface for preventing meandering. A concave groove portion 13 is formed at the center in the width direction and is formed along the longitudinal direction of the sliding contact plate 12.

Further, the pair of frames 11a, 11b
A pair of end rollers 15 are rotatably mounted between both ends in the longitudinal direction of the pair.
An endless transport belt 16 formed of an elongated rectangular flexible sheet member is wrapped around the space 15 between the movable belts. A convex portion 17 is formed on the inner surface of the transport belt 16 along the longitudinal direction of the transport belt 16 at the center in the width direction.

A drive unit 20 is disposed at substantially the center of the pair of frames 11a and 11b in the longitudinal direction, and the driving belt 20 drives the transport belt 16 in a predetermined direction. Outgoing surface 16a of conveyor belt 16
The article W to be transported placed thereon is transported. When the transport belt 16 is traveling, the forward surface of the transport belt 16
16a slides on the contacted plate body 12, and the forward path surface portion 16a
Is located in the groove 13 of the plate body 12 to be slid.
By positioning the groove 17 in the groove 13, the meandering of the forward surface 16a of the conveyor belt 16 is prevented.

Here, the drive unit 20 includes a box-shaped housing 21 having an open upper surface.
, 11b are fixed to the casing mounting portion 23 with fixing members 24 such as screws or fixing pins. The housing 21 can be easily removed from the housing mounting portion 23 with one touch only by releasing the fixing by the fixing tool 24.

The housing 21 accommodates therein a driving roller 25 which is a holding roller constituted by, for example, a motor roller or the like having a built-in motor. The driving roller 25 is disposed on one side of the return path surface portion 16b of the transport belt 16. Is rotatably disposed on the outer surface side, that is, the lower surface side. This drive roller
Both ends of the support shaft 25 are connected to both side portions of the housing 21 facing each other, the drive roller 25 is held horizontally, and a direction in which the axial direction of the drive roller 25 intersects the traveling direction of the transport belt 16. Matches. Further, on the outer peripheral surface of the drive roller 25, cylindrical members 26 for preventing slip formed of an elastic material such as polyurethane are attached at two places on both sides with a predetermined distance therebetween.

The drive roller 25 is not limited to a motor roller or the like having a built-in motor.
For example, it may be constituted by a roller or the like connected to a drive source such as a motor with an orthogonal shaft reduction gear.

On the other hand, an obliquely upper portion near the drive roller 25 is located on the inner surface, that is, the upper surface side, which is the other surface side of the return path surface portion 16b of the transport belt 16, and the axial direction is the drive roller.
The first support shaft 28 parallel to the axial direction of the two frames 11a, 11
It is bridged between b. A first belt guide roller 29 is rotatably attached to the center of the first support shaft 28 in the axial direction. First rollers 30, 30 as rollers such as timing pulleys are fitted to the first support shaft 28 at positions near both sides of the first belt guide roller 29 via bearings (not shown). Is equipped.

Further, both ends of the first support shaft 28
The two elongated plate-shaped rotating arms 31, 31 are inserted through insertion holes 32 at the base ends thereof.

The two rotating arms 31 are connected to both frames 11
a and 11b, which are spaced apart from each other and opposed to each other.
Can be turned around the turning center. As shown in FIG. 6, a long hole 33 penetrating from the inner surface, which is the facing surface, to the outer surface on the opposite side is formed at the distal end of each of the two rotating arm bodies 31 in the longitudinal direction of the rotating arm body 31. Both ends of a second support shaft 38 whose axial direction is parallel to the axial direction of the drive roller 25 are loosely inserted into the elongated hole 33.

At both ends of the loosely inserted second support shaft 38 protruding from the outer surface of the rotating arm body 31, through holes 39 are formed, which penetrate vertically, respectively.
A spring holding member 40 composed of, for example, a bolt or the like is loosely inserted therein.

Two nuts 42, 42 are screwed to the lower end of the shaft 41 of the spring holding member 40, and the upper end of the shaft 41 is in contact with the lower surface of the sliding contact plate 12. The circular contact plate portion 43 that comes into contact is formed in an enlarged diameter shape. Further, a coil spring 45 as an urging means is mounted on an outer peripheral side of a portion of the shaft portion 41 of the spring holding member 40 projecting above the second support shaft 38.

With the restoring force of the two coil springs 45, the two pivoting arms 31 are moved in the state where the contact plate 43 of the two spring holding members 40 is in contact with the lower surface of the sliding contact plate 12. 1 spindle
The tip side is urged downward with the rotation center at 28, and as a result, the second support shaft 38 is urged toward the drive roller 25, that is, downward.

On the other hand, a second belt guide roller 49 is rotatably attached to the center of the second support shaft 38 in the axial direction, and the second belt guide roller 49 is connected to the first belt guide roller 29. It is located facing away. Second rollers 50, 50, such as timing pulleys, are fitted on the second support shaft 38 at positions near both sides of the second belt guide roller 49 via bearings (not shown). Is equipped.

A communication belt 51a such as an endless timing belt formed of an elongated rectangular flexible sheet member is provided between the first roller 30 and the second roller 50 located on the frame 11a side. A first roller 30 and a second roller which are wound around the vehicle and are located on the side of the frame 11b;
A communication belt 51b such as an endless timing belt formed of an elongated rectangular flexible sheet member is wrapped around the space 50 so as to run.

The pair of communication belts 51a and 51b are located on the upper surface side of the return path surface
The surface facing the conveyor belt 16 is located at a position corresponding to the two cylindrical members 26 of 25 and runs parallel to the same direction as the conveyor belt 16.

When the second support shaft 38 is urged downward by the coil spring 45, the second rollers 50, 50 attached to the second support shaft 38 are driven by the drive roller 25. Side, and as a result, a pair of contact belts 51a, 51
b is urged toward the driving roller 25 side in a relatively approaching direction. As shown in FIG. 7, the return path surface portion 16b of the transport belt 16 is connected to the pair of communication belts 51a, 51b and the driving roller 25 by It is in a state of being sandwiched by the cylindrical member 26 in surface contact.

Each of the first belt guide roller 29 and the second belt guide roller 49 has a small-diameter portion 52 for preventing meandering at a central portion in the axial direction.
The convex portion 17 of the return path surface portion 16b of the transport belt 16 is located at a position where the convex portion 17 is located at the small diameter portion 52.
Meandering of the return surface portion 16b is prevented.

As for the positional relationship between the driving roller 25, the first roller 30, and the second roller 50, as shown in FIG. 7, the driving roller 25 and the first roller 30 are A communication belt 51a with the first roller 30,
The transport belts 16 are located apart from each other by a predetermined distance so as not to be sandwiched therebetween via 51b. Similarly, the drive roller 25 and the second roller 50 are separated from each other by a predetermined distance so that the transfer belt 16 is not sandwiched between the drive roller 25 and the second roller 50 via the communication belts 51a and 51b. positioned.

Next, the operation of the first embodiment will be described.

When the housing 21 of the drive unit 20 is fixed to the frames 11a and 11b using the fixture 24, the pair of communication belts 51a and 51b are relatively moved toward the drive roller 25 by the coil spring 45. Urges the conveyor belt 16
The return path surface portion 16b is sandwiched between the pair of communication belts 51a, 51b and the cylindrical member 26 of the drive roller 25 in a surface contact with a predetermined pressure.

The return surface 16b of the conveyor belt 16
When the drive roller 25 is driven to rotate in a state in which the transfer belt 16 is held in surface contact, the driving force from the drive roller 25 is applied to the transfer belt 16 from the held portion of the return path surface portion 16b of the transfer belt 16.
The transport belt 16 is driven to travel in a predetermined direction by the driving force from the drive roller 25.

As the transport belt 16 travels, the article W placed on the outward surface 16a of the transport belt 16 is transported toward the transport end.

On the other hand, a conveyor belt is used for cleaning, replacement, etc.
When the frame 16 is to be removed from the frames 11a and 11b, the housing 21 is removed from the housing mounting section 23 together with the drive roller 25 and the like by releasing the fixing by the fixing tool 24. Then, as shown by the two-dot chain line in FIG. 3, the two rotating arm bodies 31 rotate by their own weight by a predetermined angle in a direction in which the tip side faces downward about the first support shaft 28 as a rotation center, and the transport belt Since the transport belt 16 is loosened, the transport belt 16 is moved to both frames 11a,
It can be easily removed from 11b.

As described above, according to the first embodiment, the coil spring 45 urges the pair of communication belts 51a and 51b toward the drive roller 25 side in a relatively approaching direction. The pair of contact belts 51a and 51b and the drive roller 25
As a result, the return path surface portion 16b of the transport belt 16 is pinched in surface contact, and the pinched transport belt 16 appropriately travels with the driving force from the drive roller 25.

Accordingly, the driving force from the driving roller 25 is applied to the transfer belt 16 without holding the transfer belt 16 in line contact with a relatively strong pressure that damages the surface of the transfer belt 16 as in the related art. Since the transmission can be appropriately performed from the held portion in a surface contact, damage to the transport belt can be reduced as compared with the related art.

The coil spring 45 urges the rollers 50, 50 toward the drive roller 25 to urge the pair of communication belts 51a, 51b toward the drive roller 25 in a relatively approaching direction. Since the configuration is adopted, the configuration of the drive roller 25 side is simplified, and the drive roller 25 can be easily designed to be easily removable. That is, since the take-up device is omitted, not only the size can be reduced, but also the configuration in which the transport belt 16 is wound around the drive roller 25, the housing 21 can be removed with the drive roller 25 and the like by one touch. Can be easily designed into possible structures.

Next, the structure of a belt conveyor according to a second embodiment of the present invention will be described with reference to FIGS.

The belt conveyor shown in FIGS. 8 to 13 differs from the belt conveyor of the first embodiment in that the driving unit 60 is different from the driving unit 20.
It has.

The drive unit 60 includes a box-shaped housing 61 having an open upper surface, and the housing 61 includes both frames 11a, 11a.
It is attached to the case attaching portion 23 of b in a state where it is fixed by a fixture 24 such as a screw or a fixing pin.
The housing 61 can be easily removed from the housing mounting portion 23 with a single touch only by releasing the fixing by the fixture 24.

Inside the casing 61, drive rollers 65, 65 such as a pair of timing pulleys on both sides are coaxially housed in a state of being located on one side and facing each other while being separated from each other. Rollers 65, 65 are the return surface of transport belt 16.
At the position on the outer surface side, that is, the lower surface side of 16b, it is held horizontally so as to be rotatable and connected to a driving source such as a motor (not shown). The axial direction of each drive roller 65 coincides with the direction intersecting the running direction of the conveyor belt 16. Note that each drive roller 65 may be constituted by, for example, a motor roller having a built-in motor.

Further, inside the housing 61, a pair of driven rollers 66, 66 such as a pair of timing pulleys on both sides are accommodated coaxially in a state where they are separated from each other, and the pair of driven rollers 66, 66 are conveyed. At the position on the outer surface side, that is, the lower surface side of the return path surface portion 16b of the belt 16, the roller 16 is horizontally held by the roller frame 67 so as to be driven and rotatable.

Each of the driven rollers 66 is positioned at substantially the same height as the corresponding one of the driving rollers 65 and is spaced apart from and opposed to each of the driving rollers 65. The axial direction of each driven roller 66 coincides with the direction intersecting the running direction of the conveyor belt 16. The outer diameter of each of the driven rollers 66 is formed, for example, to be slightly smaller than the outer diameter of each of the opposing drive rollers 65.

A contact belt 71a such as an endless timing belt formed of an elongated rectangular flexible sheet member is provided between the driving roller 65 and the driven roller 66 which are located on the frame 11a side and face each other. A communication belt such as an endless timing belt formed of an elongated rectangular flexible sheet member is provided between the driving roller 65 and the driven roller 66 which are wound around the frame 11b and are opposed to each other at the frame 11b side. 71b is wrapped around for traveling. In addition,
The surfaces of the pair of communication belts 71a and 71b facing the transport belt 16 run in the same direction as the transport belt 16.

On the other hand, the drive unit 60 includes a pair of roller holding members 72, 72 on both sides.
72 is a plate on the inner surface side of each corresponding frame 11a, 11b
Fixed through 73.

Each of the roller holding members 72 is formed in an elongated cylindrical shape having an axial direction in the vertical direction and having open upper and lower surfaces. In each of the roller holding members 72, a long hole 74 having a longitudinal direction in the up-down direction is formed on the opposing surface on the side facing each other.
And a support shaft 77 parallel to the axial direction of each of the driven rollers 66.
Both ends of the support shaft 77 are loosely inserted.
Slides in the vertical direction. A large-diameter portion 78 is formed near the end of the support shaft 77, and the large-diameter portion 78 is in contact with a portion near the long hole 74 of the roller holding member 72.

A coil spring 80 as an urging means is accommodated inside each roller holding member 72, and the lower end of the coil spring 80 contacts the end of the support shaft 77, and the upper end thereof is the roller holding member. 72 is in contact with a closing member 79 closing the upper surface. The support shaft 77 is urged toward the communication belts 71a and 71b, that is, downward, by the restoring force of the coil springs 80.

Further, a free roller 81 serving as a sandwiching roller is rotatably fitted to a portion except for both ends of the support shaft 77 via a bearing or the like (not shown). The free roller 81 is horizontally located on the inner side of the return path surface portion 16b of the conveyor belt 16, that is, on the upper side and above the pair of communication belts 71a, 71b, that is, the intermediate position between the driving roller 65 and the driven roller 66. It is located in the shape.

When the support shaft 77 is urged downward by the coil spring 80, the free roller 81 attached to the support shaft 77 is relatively moved toward the pair of communication belts 71a and 71b. As shown in FIG. 13, the return path surface portion 16 b having a curved shape convex toward the lower side of the conveyor belt 16 is formed by the pair of communication belts 71 as shown in FIG.
a, 71b and the free roller 81 are in a state of being held in surface contact.

A small-diameter portion 82 for preventing meandering is formed at the center of the free roller 81 in the axial direction, and the convex portion 17 of the return path surface portion 16b of the conveyor belt 16 is located at the small-diameter portion 82.
Since the position 17 is located at the small diameter portion 52, meandering of the return surface portion 16b of the transport belt 16 is prevented.

As for the positional relationship between the driving roller 65, the driven roller 66 and the free roller 81, as shown in FIG. 13, the driving roller 65 and the free roller 81 are connected by the driving roller 65 and the free roller 81. Belt 71a,
The transport belts 16 are located apart from each other by a predetermined distance so as not to be sandwiched therebetween via the wire 71b. Similarly, the driven roller 66 and the free roller 81 are also separated from each other by a predetermined distance so that the transport belt 16 is not sandwiched between the driven roller 66 and the free roller 81 via the communication belts 71a and 71b. .

Next, the operation of the second embodiment will be described.

When the housing 61 of the drive unit 60 is fixed to the frames 11a and 11b using the fixture 24, the free roller 81 is urged by the coil spring 80 so that the pair of communication belts 71a and 71b are connected.
The belt is urged in the direction of relatively approaching toward the
A part of the 16 return road surface portions 16b is a pair of these connecting belts 71a.
, 71b and both sides of the free roller 81 in a surface contact with a predetermined pressure.

When the pair of drive rollers 65 is driven to rotate while the return path surface portion 16b of the conveyor belt 16 is held in surface contact, the driving force from the pair of drive rollers 65 is applied to the pair of communication belts 71a, 71b. It is appropriately transmitted to the conveying belt 16 from the pinched portion of the return path surface portion 16b of the conveying belt 16 via 71b.

The pair of communication belts 71a, 71
b, the transport belt 16 is driven to travel in a predetermined direction, and the travel of the transport belt 16 causes the transport belt 16 to travel.
The transported object W placed on the outward path surface portion 16a is transported toward the transport end side.

On the other hand, a conveyor belt is used for cleaning, replacement, etc.
When the frame 16 is removed from the frames 11a and 11b, the housing 61 is removed from the housing mounting section 23 together with the driving roller 65, the driven roller 66, the communication belts 71a and 71b by releasing the fixing by the fixing tool 24. . Then, the support shaft 77 of the free roller 81 slides in the elongated hole 74, and the free roller 81
Moves downward by its own weight. As a result, the transport belt 16
The transport belt 16 is moved to both frames 11
It can be easily removed from a and 11b.

As described above, according to the second embodiment, the coil spring 80 urges the free roller 81 toward the pair of communication belts 71a and 71b in a direction relatively approaching to each other. Free roller 81 and a pair of contact belts
The return path surface portion 16b of the transport belt 16 is sandwiched between the contact belts 71a and 71b in surface contact, and the sandwiched transport belt 16 travels appropriately by the driving force from the pair of communication belts 71a and 71b.

Therefore, the pair of connecting belts 71 can be held at a relatively strong pressure that damages the surface of the conveying belt 16 without contacting the conveying belt 16 in line contact.
Since the driving forces from a and 71b can be appropriately transmitted to the transport belt 16, damage to the transport belt 16 can be reduced as compared with the related art.

Further, since the coil spring 80 urges the free roller 81 toward the pair of communication belts 71a and 71b in a relatively approaching direction, the pair of communication belts 71a and 71b is biased.
The configuration on the 71b side is simplified, and the pair of contact belts 71a
, 71b can be easily designed together with the housing 61 into a configuration that can be easily removed with one touch.

Next, the structure of a belt conveyor according to a third embodiment of the present invention will be described with reference to FIGS.

The belt conveyor shown in FIGS. 14 to 17 is different from the belt conveyor in the first embodiment in that the driving unit is different from the driving unit 20.
It has 90.

The drive unit 90 includes a box-shaped casing 91 having an open upper surface, and the casing 91 is provided with two frames 11a, 11a.
It is attached to the case attaching portion 23 of b in a state where it is fixed by a fixture 24 such as a screw or a fixing pin.
The housing 91 can be easily removed from the housing mounting portion 23 with a single touch only by releasing the fixing by the fixing tool 24.

Inside the housing 91, a pair of drive rollers 95, 95 such as a pair of timing pulleys on both sides are coaxially accommodated in a state of being separated from each other and opposed to each other.
Numerals 5 and 95 are horizontally held rotatably at positions on the outer surface side, that is, the lower surface side of the return path surface portion 16b of the transport belt 16, and are connected to a drive source such as a motor (not shown). The axial direction of each drive roller 95 coincides with the direction intersecting the traveling direction of the transport belt 16. Note that each drive roller 95 may be configured by, for example, a motor roller having a built-in motor.

Further, inside the housing 91, a pair of driven rollers 96, 96 such as a pair of timing pulleys on both sides are coaxially accommodated in a state of being spaced apart from each other, and these paired driven rollers 96, 96 are conveyed. At the position on the outer surface side, that is, the lower surface side of the return path surface portion 16b of the belt 16, the belt 16 is horizontally held so as to be driven and rotatable. Each of the driven rollers 96 is located at the same height position as the corresponding drive roller 95 so as to be separated from and opposed to each drive roller 95. The axial direction of each driven roller 96 coincides with the direction intersecting the running direction of the conveyor belt 16, and the outer diameter of each driven roller 96 is formed, for example, to be slightly smaller than the outer diameter of the opposing drive roller 95. Have been.

Further, each of the driven rollers 96, 96
6, the corresponding roller holding members
At 97, 97, it is held so as to be capable of moving toward and away from the opposing drive rollers 95, 95.

Each roller holding member 97 is connected to a connecting side plate 98.
Have opposing side plates 99, 99 opposing each other,
Elongated holes (not shown) having a longitudinal direction in the horizontal direction are formed in the opposed side plate portions 99, 99, and both ends of the support shaft of each driven roller 96 are slidably inserted into these elongated holes. .

On the outer surface of the opposing side plate 99 of each roller holding member 97, a spring hooking projection 100 is provided.
And is formed in the vicinity of the connection portion with and protruding toward the side. One end of a tension spring 101 as an urging means is hooked on the spring hooking projection 100, and the other end of the tension spring 101 projects from an elongated hole at the end of the support shaft of the driven roller 96. This tension spring 10
At 1, the driven roller 96 is urged in a direction relatively away from the drive roller 95.

[0086] A communication belt 102a such as an endless timing belt formed of an elongated rectangular flexible sheet member is provided between the driving roller 95 and the driven roller 96 which are located on the frame 11a side and face each other. A communication belt such as an endless timing belt formed of an elongated rectangular flexible sheet member is provided between the driving roller 95 and the driven roller 96 which are wound around the frame 11b and are opposed to each other on the frame 11b side. 102b is wrapped around to run. The transport belt 1 of the pair of communication belts 102a, 102b
The surface facing 6 runs in the same direction as the conveyor belt 16.

On the other hand, as shown in FIG. 17, the drive unit 90 includes a free roller 103 serving as a nipping roller.
A pair of communication belts 102 on the inner side of 16b, that is, the upper side
It is horizontally rotatable at a position above a and 102b, that is, an intermediate position between the driving roller 95 and the driven roller 96.

That is, the free roller 103 is rotatably fitted to a support shaft 104 spanned between the pair of frames 11a and 11b via a bearing or the like (not shown). The axial direction of the support shaft 104 of the free roller 103 is parallel to the respective axial directions of the drive roller 95 and the driven roller 96.

Then, the driven roller 96 is driven by the tension spring 101.
Is urged and pulled in a direction away from the drive roller 95, the pair of communication belts 102a and 102b are urged in a direction relatively approaching toward the free roller 103 side, as shown in FIG. As a result, the return path surface portion 16b having a convex curved shape toward the lower side of the transport belt 16 is sandwiched between the pair of communication belts 102a and 102b and the free roller 103 in a surface contact.

A small-diameter portion 105 for preventing meandering is formed at the center of the free roller 103 in the axial direction.
5, the convex portion 17 of the return surface 16 b of the conveyor belt 16 is located, and the convex 17 is located at the small-diameter portion 105, thereby preventing the return belt surface 16 b of the conveyor belt 16 from meandering.

As for the positional relationship between the driving roller 95, the driven roller 96 and the free roller 103, as shown in FIG.
A contact belt is formed by these drive rollers 95 and free rollers 103.
The transfer belts 16 are located at a predetermined distance from each other so as not to be sandwiched between the transfer belts 102a and 102b. Similarly, the driven roller 96 and the free roller 103 are also connected to the communication belts 102a, 102a by the driven roller 96 and the free roller 103.
The transport belts 16 are spaced apart from each other by a predetermined distance so as not to be sandwiched between the transport belts 2b.

Next, the operation of the third embodiment will be described.

When the casing 91 of the drive unit 90 is fixed to the frames 11a and 11b using the fixture 24, the driven roller 96 is urged by the tension spring 101 in the direction away from the drive roller 95. A pair of contact belts 102a, 10
2b is urged toward the free roller 103 in a relatively approaching direction. As a result, the return path surface portion 16b of the conveyor belt 16 is moved between the pair of contact belts 102a, 102b and both side portions of the free roller 103 by a predetermined distance. It is pinched in pressure contact.

When the pair of drive rollers 95, 95 is rotated while the return path portion 16b of the conveyor belt 16 is held in surface contact, the driving force from the pair of drive rollers 95, 95 is reduced to a pair. Conveyor belt via contact belts 102a and 102b
It is appropriately transmitted to the transport belt 16 from the portion to be held of the 16 return surface portions 16b.

The pair of communication belts 102a, 102a
2b, the transport belt 16 is driven to travel in a predetermined direction, and the travel of the transport belt 16 causes the transport belt 16 to travel.
The transported object W placed on the outward path surface portion 16a is transported toward the transport end side.

On the other hand, a conveyor belt is used for cleaning, replacement, etc.
When the frame 16 is removed from the frames 11a and 11b, the housing 91 is removed from the housing mounting section 23 together with the driving roller 95, the driven roller 96, the communication belts 102a and 102b by releasing the fixing by the fixing tool 24. . Then, the conveyor belt
Since the transport belt 16 is loosened, move the transport belt 16 to both frames.
It can be easily removed from 11a and 11b.

As described above, according to the third embodiment, the tension spring 101 is connected to the pair of connecting belts 102a, 102b.
Is biased toward the free roller 103 in a relatively approaching direction, and the return belt surface portion 16b of the transport belt 16 is sandwiched between the biased contact belts 102a and 102b and the free roller 103 in a surface contact manner. The nipped transport belt 16 travels appropriately with the driving force from the pair of communication belts 102a and 102b.

Therefore, even if the conveying belt 16 is not pinched in a line contact with a relatively strong pressure that damages the surface of the conveying belt 16 as in the prior art, the pair of connecting belts 10 can be used.
Since the driving forces from 2a and 102b can be appropriately transmitted to the transport belt 16, damage to the transport belt 16 can be reduced as compared with the related art.

The tension spring 101 is a pair of communication belts.
Since the configuration is such that the components 102a and 102b are biased toward the free roller 103 in a relatively approaching direction, the configuration of the free roller 103 is simplified, and the manufacturing cost can be reduced.

Further, each driven roller 96, 96 is opposed to a driving roller 9 by a corresponding roller holding member 97, 97.
Each of the driven rollers 96, 96 is pulled by a corresponding tension spring 101, and each of the contact belts 102a, 102b is pulled by the other contact belt 102a,
Since it is urged toward the free roller 103 side independently of 102b, by adjusting the spring coefficient and the like of the tension spring 101,
Each of the contact belts 102a, 102b corresponds to the state of the pinched portion of the corresponding position of the transport belt 16 of the contact belts 102a, 102b.
An appropriate holding force can be easily set for each case.

In the first embodiment,
The configuration has been described in which the second support shaft 38 is urged downward by the coil spring 45 to urge the communication belts 51a and 51b toward the drive roller 25 side. For example, the first support shaft 28 and the second 2
Urging both of the support shafts 38 downward, the communication belts 51a, 51b
May be biased toward the drive roller 25 side in a relatively approaching direction.

Further, in the first embodiment, the driving roller 25 is moved by the urging means (not shown) to the communication belts 51a, 51a.
A configuration may be adopted in which the transport belt 16 is held in surface contact with the drive roller 25 and the communication belts 51a and 51b by urging the belt in a direction relatively approaching the 51b side.

On the other hand, both the drive roller 25 and the communication belts 51a and 51b are urged in a direction relatively approaching by an urging means (not shown) so that the drive roller 25 and the communication belt
The transport belt 16 may be sandwiched between the surface 51a and 51b in surface contact.

Further, in the second embodiment, for example, both the free roller 81 and the connecting belts 71a and 71b are urged in a direction relatively approaching by urging means (not shown), and these free rollers 81 are urged. The conveying belt 16 may be sandwiched between the contact belts 71a and 71b in surface contact.

In the third embodiment, for example, only the driving roller 95 or both the driving roller 95 and the driven roller 96 are urged by urging means (not shown) in a direction in which the driving roller 95 and the driven roller 96 are relatively separated from each other. By contact belt 102a,
The free roller 103 and the communication belt 102 are urged toward the free roller 103 in a relatively approaching direction.
A configuration may be adopted in which the transport belt 16 is sandwiched between the a and 102b in surface contact.

[0097]

According to the belt conveyor of the first aspect, the conveying belt is tensioned by the urging means to take up.
Since the configuration of the pump device is omitted, miniaturization can be achieved.
Not only can the conveyor belt be urged by urging means
The belt is held in tension and is held between the holding roller and the contact belt in surface contact, and is driven by the driving force from either the holding roller or the contact belt.Therefore, the transfer belt does not need to be held with relatively strong pressure. Since the driving force can be properly transmitted to the transport belt, damage to the transport belt can be reduced as compared with the conventional case, and the transport belt is a contact belt.
Or loosened from tension due to removal of pinching roller
The conveyor belt will be in a state when cleaning, replacing, etc.
Can be easily removed from the frame.

According to the belt conveyor of the second aspect,
The urging means urges at least one of the drive roller and the contact belt in a direction relatively approaching toward at least one of the other sides, and causes the drive roller and the contact belt to sandwich the transport belt in a surface contact. Since the transport belt is driven by the driving force from the driving roller, the driving force can be appropriately transmitted to the transport belt without pinching the transport belt with relatively strong pressure. it can.

According to the belt conveyor of the third aspect,
The urging means urges at least one of the pair of rollers toward the drive roller to urge the communication belt toward the drive roller in a relatively approaching direction. And the drive roller can be easily designed to be detachable.

According to the belt conveyor of the fourth aspect,
The biasing means moves the free roller toward the contact belt
The contact belt side
Configuration is simplified and the contact belt can be removed.
Can be easily designed.

According to the belt conveyor of the fifth aspect,
The urging means is at least one of a driving roller and a driven roller.
One that is relatively far away with one of them facing the other
Urge the contact belt toward the free roller side
Is designed to bias in the direction of
The configuration on the LA side can be simplified.

According to the belt conveyor of the sixth aspect,
Each biasing means places the corresponding contact belt on the free roller side.
Because they are biased independently in the direction of relatively approaching
Depending on the state of the pinched portion at the corresponding position of the feed belt,
Appropriate pinching force can be set for each contact belt.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of a belt conveyor according to the present invention.

FIG. 2 is a plan view of the belt conveyor.

FIG. 3 is a side view of a drive unit of the belt conveyor.

FIG. 4 is a front view of a drive unit of the belt conveyor.

FIG. 5 is a plan view of a drive unit of the belt conveyor.

FIG. 6 is a perspective view of a rotating arm of a drive unit of the belt conveyor.

FIG. 7 is a schematic view of a drive unit of the belt conveyor.

FIG. 8 is a side view showing a second embodiment of the belt conveyor of the present invention.

FIG. 9 is a plan view of a drive unit of the belt conveyor.

FIG. 10 is a front view of a drive unit of the belt conveyor.

FIG. 11 is a side view of the drive unit of the belt conveyor.

FIG. 12 is a plan view of a drive unit of the belt conveyor.

FIG. 13 is a schematic view of a drive unit of the belt conveyor.

FIG. 14 is a side view showing a third embodiment of the belt conveyor of the present invention.

FIG. 15 is a schematic diagram of a drive unit of the belt conveyor.

FIG. 16 is a plan view of a drive unit of the belt conveyor.

FIG. 17 is a front view of a drive unit of the belt conveyor.

FIG. 18 is a schematic view of a drive unit of a conventional belt conveyor.

[Description of Signs ] 11a, 11b Frame 16 Conveying Belt 25 Driving Roller 30 as Nipping Roller First Roller 45 as Roller 50 Coil Spring 50 as Urging Means 50 Second Roller 51a, 51b as Roller Driving Contact Belt 65 Roller 66 Follower rollers 71a, 71b Contact belt 80 Coil spring 81 as biasing means 81 Free roller as a clamping roller 95 Drive roller 96 Follower roller 101 Tension springs 102a, 102b as biasing means Contact belt 103 Free roller as clamping roller W Conveyed object

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65G 23/00-23/16

Claims (6)

(57) [Claims] 1. A pair of frames which are separated from each other and opposed to each other, an endless transportable transport belt detachably attached between the frames, and a surface facing the transport belt faces in the same direction as the transport belt. An endless runnable contact belt disposed so as to travel in parallel with the contact belt, and rotatably disposed at a position opposed to the contact belt via the transport belt, the axial direction of the contact belt traveling. A pinching roller that coincides with a direction intersecting the direction, and urging means for urging at least one of the pinching roller and the contact belt in a direction relatively approaching toward at least one of the other sides. A pair of rollers that are located opposite to each other and whose axial direction coincides with the direction intersecting with the traveling direction of the transport belt and around which the contact belt is wound. The pair of rollers are located at a predetermined distance from each other with the respective rollers and the holding roller not sandwiching the transport belt via the communication belt, and the holding roller and the connection belt is one of removably attached to the frame, this one is removable nip roller and continuous fault belt, is configured to output driving force, said conveyor belt, said removable In a state where any one of the holding roller and the contact belt is attached, the contact belt is urged by the urging means to be in a tension state, and is pinched by the holding roller and the contact belt in surface contact,
Traveling by the driving force from one of said removable clamping roller and continuous fault belt conveys the conveying object, either one of the removable holding rollers and continuous fault belt is removed A belt conveyor characterized by being in a relaxed state from a tensed state in a folded state. 2. The belt conveyor according to claim 1, wherein the nipping roller is a rotatable driving roller whose axial direction coincides with a direction intersecting the running direction of the conveyor belt. 3. The urging means urges at least one of the pair of rollers toward the drive roller to urge the contact belt in a direction relatively approaching the drive roller. The belt conveyor according to claim 2, wherein: 4. The nipping roller is a rotatable free roller that is located on one surface side of the conveyor belt and whose axial direction coincides with a direction intersecting the traveling direction of the conveyor belt. A drive roller and a driven roller, both of which are located opposite to each other on the other surface side of the conveyor belt and whose axial direction coincides with the direction intersecting with the traveling direction of the conveyor belt and the communication belt is wound around, The belt conveyor according to claim 1, wherein the urging means urges the free roller in a direction relatively approaching toward the communication belt. 5. The nipping roller is a rotatable free roller which is located on one surface side of the conveyor belt and whose axial direction coincides with a direction intersecting the running direction of the conveyor belt. A drive roller and a driven roller, both of which are located opposite to each other on the other surface side of the conveyor belt and whose axial direction coincides with the direction intersecting with the traveling direction of the conveyor belt and the communication belt is wound around, The urging means relatively urges the communication belt toward the free roller by urging at least one of the driving roller and the driven roller in a direction in which the driving roller and the driven roller relatively move away from each other. The belt conveyor according to claim 1, wherein the belt is biased in a direction to approach the belt. 6. A plurality of communication belts are provided, and the plurality of communication belts are respectively positioned on one surface side of the conveyor belt so as to be separated from and opposed to each other with a running direction parallel to the running direction of the conveyor belt. A plurality of contact belts are provided corresponding to the contact belts so as to urge the corresponding contact belts independently of other contact belts in a direction relatively approaching toward the free roller side. The belt conveyor according to claim 5, wherein