JPS63247207A - Conveyor belt supporting device - Google Patents

Abstract

PURPOSE:To reduce the maintenance manhour and prevent the dispersion of transported articles by supporting the undersurface at the both side edge parts of a conveyor belt by a plurality of rollers which are supported by a plate- shaped elastic body and applied with a friction reducing material on the outer peripheral surface, in the captioned device in the vicinity of the lower opened port part of a chute. CONSTITUTION:In the vicinity of a lower opened port edge of a chute 3, a plurality of rollers 22 are arranged in contact with the undersurface of a con veyor belt 2 in the direction of length of the conveyor belt 2. The roller 22 is installed on the whole length in the surface contact with a plate-shaped elastic body 23, and supported by a frame 24. Further, the outer peripheral surface of the roller 22 is made of the friction reducing material such as fluorinated resin, etc. With such constitution, the shock in the case when a transported article is supplied from the chute 3 is lightened by the deformation of the center part 2a of the conveyor belt 3. Therefore, the breakage and dispersion of the transported articles due to the shock can be prevented, and maintenance can be carried out in simple ways.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is directed to a chute that is disposed so as to be able to come into contact with the lower surface of a conveyor belt and supplies conveyed articles onto the conveyor belt, at a portion near the opening at the lower end of the chute. The present invention relates to a conveyor belt support device that supports conveyor belts, and in particular effectively prevents damage to the conveyor belt and falling of conveyed objects from the conveyor belt.

(Prior Art) As a conventional conveyor belt support device, there is one shown in FIG. 4, for example.

In the figure, 1 indicates a tail pulley, 2 indicates a conveyor belt wound around the tape pulley 1 and a head pulley (not shown), and 3 indicates a chute for supplying conveyed objects onto the conveyor belt.

In addition, 4 in the figure indicates a conveyor belt support device that constantly contacts the lower surface of the conveyor belt 2 at a portion corresponding to the lower end opening of the chute 3, and this conveyor belt support device 4
Carrier rollers 5 are provided at the front and rear positions of the conveyor belt 1, and return rollers 6 are provided on the return side of the conveyor belt 1.

The conveyor belt support device 4 here includes a rubber elastic layer 8 pasted on the outer circumferential surface of a rigid roller rough at multiple locations spaced apart in the length direction of the conveyor belt 2, as shown in the cross-sectional view in FIG. 4(b). Three cushion rollers 9
extend in the width direction of the conveyor belt 2, are supported by the device frame 10, and the axes of the two cushion rollers 9 that contact both ends of the conveyor belt 2 are aligned in a vertical plane. The side ends of the conveyor belt 2 are inclined upwardly.

Such a conveyor belt support device 4 buffers the collision impact between the conveyed object fed through the chute 3 and the conveyor belt 2 by means of tension rollers 9, and
It functions to support the weight of the transported object and the conveyor belt 2, and to bring both ends of the conveyor belt 2 into contact with the skirt rubber 11 attached to the lower end of the chute 3.

(Problems to be Solved by the Invention) However, in this prior art, in particular, since the cushion roller 9 extending in the horizontal direction is in contact with the center portion of the conveyor belt 2 in the width direction, In addition to the problem that the conveyor belt 2 is damaged relatively early due to the reaction force of the cushion roller when the conveyed object fed through the chute 3 collides with the conveyor belt 2, there is also a problem that the conveyor belt 2 is damaged relatively quickly. As a result, the cushion roller 9 is prone to deformation, other damage, or detachment, which increases the number of maintenance steps. , there is a problem in that the conveyor belt 2 may be vertically cracked or scratched.

Furthermore, in this conventional conveyor belt support device 4, the cushion roller 9 is in contact with the conveyor belt 2 at intervals in the length direction, so that the conveyor belt 2 is moved against the cushion roller by the collision impact of the conveyed object. When the conveyor belt 2 is bent between the conveyor belt 2 and the skirt rubber 11, the conveyed object jumps out from the gap created between the conveyor belt 2 and the skirt rubber 11 at the bent part, staining the surrounding area, and the conveyed object jumps out between the tail pulley l and the conveyor belt 2. There was a problem that the conveyor belt 2 could be damaged by getting caught between the conveyor belt 2 and the conveyor belt 2.

The present invention advantageously solves the problems of the prior art, and in particular, by omitting support for the conveyor belt at its widthwise central portion, it significantly reduces maintenance man-hours and improves the conveyor belt. Effectively prevent various damages, in addition, the equipment can be attached to the conveyor belt,
The object of the present invention is to provide a conveyor belt support device that can sufficiently prevent objects to be transported from flying out by continuously contacting the conveyor belt in its length direction.

(Means for Solving the Problems) The conveyor belt support device of the present invention particularly provides a plurality of supports at each side end of the conveyor belt that extend in the length direction and contact the lower surface of the conveyor belt. Arrange the rollers,
At least the outer circumferential surface of those rollers is coated with an anti-friction material, such as a fluoroplastic.

It is constructed from synthetic resin materials such as polyamide, polyacetal, polyurethane, and ultra-high molecular weight polyethylene, and each roller is supported on the device frame via a plate-shaped elastic body that is in surface contact with each roller over its entire length. Become.

(Function) In this conveyor belt support device, the conveyor belt
It will be supported only at both end portions, and the center portion in the width direction is preferably released from support over a width of 173 or more of the belt width, so that the conveyed material fed from the chute can be carried there. The impact impact will be alleviated by the elastic deformation of the conveyor belt itself,
This effectively prevents premature damage to the conveyor belt due to it being slammed against the cushion rollers, as in the prior art.

In addition, here, the center portion of the conveyor belt in the width direction, which is subject to a particularly large collision impact due to conveyed objects, is released from support, so the supporting means may be damaged or detached due to the collision impact, and other damage may occur due to such damage. Damage to the conveyor belt will be completely prevented.

Moreover, here, the rollers are in continuous contact with the conveyor belt in its length direction, so even if the conveyed object collides with the conveyor belt, local deflection of the conveyor belt is sufficiently prevented. , there is no risk of creating a gap between the conveyor belt and the skirt rubber that would cause the conveyed object to jump out.

In addition, according to this device, the bottom surface of the conveyor belt
In addition to making line contact with the anti-friction material, which has a low coefficient of friction and is highly wear resistant, the line contact position constantly changes depending on the amount of conveyed objects on the conveyor belt, and furthermore, the line Contact occurs only at the inclined end of the conveyor belt, and the collision load of the conveyed object on the inclined end is mainly in the direction perpendicular to the inclined surface of the side end and in the direction of the inclination. By dispersing it, it is possible to effectively prevent an increase in the driving power of the conveyor belt, and it is also possible to sufficiently prevent local wear and other damage to the lower surface of the conveyor belt.

(Example) Embodiments of the present invention will be described below based on the drawings.

Figures 1(a) and 1(b) are a side view and a perspective view of a route, respectively, without showing an embodiment of the present invention, and in the figures, parts similar to those described in the conventional example are designated by the same numbers. .

Here, a conveyor belt 2 is wound around a tail pulley 1 and a head pulley (not shown) with a predetermined tension, and a carrier roller 5. A conveyor belt support device 21 is provided so that the front and rear ends of the conveyor belt support device 21 protrude somewhat before and after the lower end opening of the chute 3.

In this conveyor belt support device 21 here, as shown in the cross-sectional view in FIG. Each roller 22 is arranged to extend in the length direction, and at least the outer circumferential surface of each of these rollers 22, in the illustrated example, the entire surface is made of an anti-friction material such as fluororesin, polyamide, polyacecool, polyurethane, ultra-high molecular weight polyethylene, etc. Constructed from synthetic resin material.

Here, each of the rollers 22, which can have a solid structure in addition to the hollow structure shown in the figure, is connected to a plate-shaped elastic body 23 that is in surface contact with each of the rollers 22 over its entire length.
It is supported on the device frame 24 via.

The rollers 22 are supported in this manner by attaching a plate-shaped elastic body 23 made of natural rubber, synthetic rubber, etc. to the inclined top plate 24a of the device frame 24, and then attaching each roller 22 to the plate-shaped elastic body 23. The hollow rollers 22 may be fitted into the respective grooves 23a and then fixed or fixed in the respective grooves, or as shown in FIG. This can be done by inserting and pivoting a pin 25 protruding from the device frame 24. According to these support methods, the impact load transmitted to the roller 22 via the conveyor belt 2 is transferred to the plate. In addition, in the latter method, by rotating the rollers 22 around the bins 25 as the load acting on the conveyor belt 2 changes, the conveyor belt 2 and 0-ra 2
2 can be maintained for a long period of time.

In addition, when supporting the roller 22 in this way, the plate-like elastic body 23 can be composed of a plurality of elastic members that are spaced apart in the width direction or that are in close contact with each other. In the case of an actual structure, the trunnions protruding from both ends can be supported by the device frame 24.

Preferably, the installation height of the conveyor belt support device configured as described above is 2 to 2 times higher than that of the carrier roller 5.5, as shown in the side view of FIG. 2(c).
When the conveyor belt 2 is under no load by lowering the temperature by about 5mT1, the lower surface of the conveyor belt 2 is
This prevents unnecessary wear and other damage to it, as well as power loss.

According to the device configured in this manner, when the conveyed object is supplied onto the conveyor belt through the chute 3, the collision impact is applied to the central portion of the conveyor belt 2 in the width direction, preferably 173 or more of the heald width. Free deformation zone 2 with a width of
The elastic deformation of a, the elastic deformation of the plate-like elastic body 23, etc. provide sufficient cushioning, and therefore, the conveyor belt 2 is cushioned, compared to the conventional technology in which the conveyor belt 2 is supported over its entire width. It is possible to effectively prevent early damage to the conveyor belt caused by being struck by the rollers, and it is also possible to completely prevent damage to the conveyor belt caused by breakage or detachment of the cushion roller.

Further, in this support device, when an impact load is applied to the conveyor belt 2, the conveyor belt 2 is
2, the conveyor belt 2 is supported over its entire length, and no local deformation of waves in the running direction occurs in the conveyor belt 2. Therefore, the contact state between the conveyor belt 2 and the skirt rubber 11 is controlled by the support device. It is always maintained reliably over the entire length of the conveyor belt, and general objects are sufficiently prevented from flying out from between them.

Furthermore, in this device, at least the outer peripheral surface of the roller 22 is made of an anti-friction material that has a small coefficient of friction and excellent wear resistance, and this anti-friction material and the conveyor belt 2 are brought into line contact. An increase in the driving power of the conveyor belt 2 can be effectively prevented, which means that the roller 22
This is particularly noticeable when the contact position of the roller 22 with the conveyor belt 2 can be changed in various ways by making it rotatable.

In addition, here, the line contact position of the conveyor belt 2 with each roller 22 changes depending on the amount of conveyed objects loaded thereon, and furthermore, the line contact position of the conveyor belt 2
The collision load of conveyed objects on the inclined side end is mainly distributed in the direction perpendicular to the inclined surface of the side end and in the inclined direction. Since a large concentration of stress does not occur on the belt 2, local wear and other damage to the lower surface of the conveyor belt can be sufficiently prevented.

FIG. 3 is a sectional view showing another embodiment of the invention,
Here, at each side end of the flat conveyor belt 31, each of the plurality of rollers 32 is supported horizontally by the device frame 34 via a plate-shaped elastic body 33 that makes surface contact with each roller 32. The conveyor belt support device 35 is configured as follows.

This support device 35 is different from the above-mentioned support device 21 in that each roller 32 is supported in the same horizontal plane, but by supporting the conveyor belt 31 with rollers only at both ends thereof. , it is possible to bring about the same effects as the above-mentioned device.

(Effects of the Invention) Therefore, according to the present invention, by supporting the conveyor belt only at its side ends by rollers extending in the length direction, it is possible to significantly reduce maintenance man-hours, and also to significantly reduce the number of maintenance steps for the conveyor belt. Various damages can be sufficiently effectively prevented, and by bringing the conveyor belt and roller into continuous contact in the length direction of the conveyor belt, it is possible to advantageously prevent objects from flying out.

[Brief explanation of the drawing]

Figures 1 (a) and (b) are a side view and a perspective view of a route showing one embodiment of the present invention, respectively, and Figures 2 (a), (b), and (c) are views of a first embodiment of the invention.
3 is a sectional view showing another embodiment of the present invention, and FIG.
a) and (b) are a route side view and a sectional view, respectively, showing a conventional example. 2.31...Conveyor belt 3...Chute 5...Carrier roller 11...Skirt rubber

Claims (1)

[Claims] 1. A chute for supplying conveyed objects onto a conveyor belt;
In a conveyor belt support device that is disposed near the lower end opening and contacts the lower surface of the conveyor belt, a plurality of rods are provided at each side end of the conveyor belt and extend in the length direction and contact the lower surface of the conveyor belt. At least the outer circumferential surface of these rollers is made of an anti-friction material, and each roller is attached to the device frame via a plate-shaped elastic body that is in surface contact with each roller over its entire length. Conveyor belt support device.