WO2007141925A1

WO2007141925A1 - Belt conveyor device and method of assembling and adjusting belt

Info

Publication number: WO2007141925A1
Application number: PCT/JP2007/050787
Authority: WO
Inventors: Naoki Ohashi
Original assignee: Olympus Corporation
Priority date: 2006-06-02
Filing date: 2007-01-19
Publication date: 2007-12-13
Also published as: JP2007320740A

Abstract

A belt conveyor device where assembleability of a belt is improved and adjustment of belt meandering is facilitated. The belt conveyor device has a base, the belt for conveying an object placed on it, a roller for applying tension to the belt, and an installation mechanism for installing the shaft of the roller so that the position of the shaft is adjustable. The installation mechanism has a bracket fixed at both ends of the shaft of the roller and having a long hole extending in the movement direction of the bracket, and fastening means for fixing the bracket to a base by using the long hole in the bracket. A butting surface is provided at the base, and the shaft is butted against the butting surface with tension applied to the belt.

Description

Specification

Belt conveying device and belt assembly adjusting method

Technical field

The present invention relates to a belt conveyance device and a belt assembly adjustment method.

Background art

Conventionally, as this type of belt conveyance device, for example, a device disclosed in Patent Document 1 is known.

The belt conveying device includes a sensor that detects meandering in the vicinity of both side edges of the belt that is stretched around the roller, and a drive unit that changes the angle of the roller based on the output of the sensor. Further, in Patent Document 1, as a prior art, both ends of a roller shaft are supported by a bracket that is movable with a long hole with respect to a guide rail, and the two brackets are pressed with push screws. A meandering adjusting mechanism for applying tension to the belt is disclosed.

Patent Document 1: JP-A-8-67373

Disclosure of the invention

[0003] However, in the method using a sensor, since the meandering adjustment of the belt is automatically performed, there is a problem that electric power is required and the running cost is high. In addition, this belt conveying apparatus has a problem that the product cost is high because of the large number of parts and the complicated mechanism. In particular, once adjusted, there is no advantage of a device that automatically performs meandering adjustment for devices that do not need to be adjusted afterwards! ,.

[0004] In addition, the conventional meandering adjustment mechanism for adjusting the belt tension with the push screw disclosed in Patent Document 1 does not have the above-described problems. However, the brackets fixed to both ends of the roller are each fixed through four long holes with four fixing screws, and the position of the roller cannot be uniquely determined during assembly, resulting in poor assembly. There's a problem.

[0005] The present invention has been made in view of the above-described circumstances, and provides a belt transport mechanism and a belt assembly adjustment method capable of improving belt assembly and easily performing meandering adjustment. It is aimed. In order to achieve the above object, the present invention provides the following means.

A base, a belt for carrying the object to be conveyed, a roller for applying tension to the belt, and an attachment mechanism for attaching the shaft of the roller to the base so that the position can be adjusted. A bracket having a long hole fixed to both ends of the shaft of the roller and extending in the moving direction; and a fastening means for fixing the bracket to the base via the long hole of the bracket. Provided is a belt conveyance device in which the abutting surface is provided on the base so as to abut against the shaft in a worn state.

[0007] According to the present invention, the shaft of the roller is abutted against the abutting surface provided on the base when the belt is applied to the roller with a minute tension applied thereto. The abutment surface provided on the base can be provided with high accuracy by a mechanical cage. Therefore, when the shaft is abutted against the abutting surface at the time of assembly, the roller around which the belt is stretched is assembled in a state where it is accurately positioned on the base. Then, from this state, the bracket is fixed to the base by moving the bracket relative to the base and fastening the fastening means through the long hole of the bracket. The belt can be assembled so as not to meander by adjusting the belt tension by moving the rollers once positioned accurately. Compared with the case where tension is applied to the belt once assembled at an intermediate position where it has not been hit anywhere, the assemblability has been greatly improved, and subsequent tension adjustment work has become easier. can do.

[0008] In the above invention, the base may be provided with a long hole-shaped guide hole that allows the shaft to pass therethrough, and the abutting surface may be constituted by an end surface of the guide hole. In this way, the shaft is guided by the elongated guide hole so as to be movable in one direction, and is abutted against the abutting surface constituted by the end face of the guide hole. By configuring the abutting surface by the end face of the internal hole, the abutting surface can be easily and accurately formed. Since the shaft is abutted against the end face of the guide hole by applying tension to the belt at the time of assembly, the roller over which the belt is stretched can be assembled to the base with high accuracy.

[0009] In the above invention, the base is provided with a long guide groove into which the end of the shaft is inserted, and the abutting surface is constituted by the end face of the guide groove. As good as.

In this way, the roller around which the belt is stretched can be assembled to the base in a precisely positioned state in the same way as the guide hole.

[0010] In the above invention, the base may be provided with a tension adjusting mechanism that moves the shaft in a direction to increase the tension of the belt.

By doing so, the shaft is moved in the direction of increasing the belt tension by the operation of the tension adjusting mechanism, and the belt tension is adjusted. In this case, the tension can be adjusted more easily and surely while preventing the meandering of the belt by operating the force / tension adjusting mechanism by abutting the shaft against the abutting surface and assembling with high accuracy.

[0011] In addition, the present invention is a belt assembly adjustment method in which a belt for carrying and transporting an object to be transported is stretched over a roller and assembled to a base, and the shaft of the roller is abutted against an abutting surface provided on the base In this state, a belt assembly adjustment method is provided in which tension is applied to a belt that is stretched around a roller, and then both ends of the shaft are pressed evenly to adjust the tension.

[0012] According to the present invention, with the roller shaft abutting against the abutting surface provided on the base, the shaft is maintained in the abutting state on the abutting surface by applying a tension to the belt stretched around the roller. Then, the roller is assembled in a state of being accurately positioned with respect to the base. Then, by pressing both ends of the shaft evenly, the tension of the belt can be adjusted more easily and accurately, and the belt can be assembled easily without meandering.

[0013] According to the present invention, it is possible to improve the assembling property of the belt and easily adjust the meandering effect.

Brief Description of Drawings

FIG. 1 is a longitudinal sectional view showing a roller portion of a belt conveyance device according to an embodiment of the present invention.

FIG. 2 is a side view of the belt conveyance device of FIG.

[FIG. 3] (a) and (b) are longitudinal sectional views for explaining the assembly process of the belt conveying device of FIG. 1, (a) is a roller positioning process, and (b) is a movable bracket mounting process. It shows.

4 is a longitudinal sectional view for explaining a belt tension adjusting process in the belt conveyance device of FIG. 1. The

FIG. 5 is a longitudinal sectional view showing a modification of the belt conveyance device in FIG. 1.

FIG. 6 is a side view of the belt conveyance device of FIG.

Explanation of symbols

[0015] 1 belt conveyor

2 base

3 bell

4 Roller

5 shaft

6 Mounting mechanism

8 Guide hole

8a End face (Abutting face)

9 Screw hole (fastening means)

12 Movable bracket (bracket)

12b slotted hole

13 bolts (fastening means)

14 Pressing bolt (Tension adjusting mechanism)

15 Nut (Tension adjustment mechanism)

BEST MODE FOR CARRYING OUT THE INVENTION

[0016] A belt conveyance device 1 according to an embodiment of the present invention will be described below with reference to Figs.

As shown in FIG. 1 and FIG. 2, the belt conveyance device 1 according to the present embodiment is based on a base 2, a belt 3, a roller 4 for applying tension to the belt 3, and a shaft 5 of the roller 4. 2 is provided with an attachment mechanism 6 that is attached so as to be adjustable in position.

The base 2 is provided with a pair of flat plate members 7 facing each other with a parallel interval. The flat plate member 7 is provided with long hole-shaped guide holes 8 penetrating each other at opposing positions. The guide hole 8 is formed by machining at a predetermined position of the base 2 with high accuracy. In addition, the flat plate member 7 is provided with screw holes 9 for a total of four force points, each with two force points, with the guide hole 8 in between It has been.

The roller 4 is rotatably attached to the shaft 5 by a bearing 10. At both ends of the shaft 5, fitting portions 5a to be inserted into the guide holes 8 provided in the base 2 are provided. The outer diameter dimension of the fitting portion 5a is formed to be approximately the same diameter as the end face 8a of the guide hole 8 of the base 2.

The mounting mechanism 6 includes an L-shaped fixed bracket 11 fixed to the two flat plate members 7 of the base 2, an L-shaped movable bracket 12 movably mounted on the base 2, and a base The bolt 13 is fastened to the screw hole 9 of 2 to fix the brackets 11 and 12 to the base 2, and the pressing bolt 14 and the nut 15 are used to apply a pressing force in the direction of narrowing the interval between the brackets 11 and 12. I have.

The movable bracket 12 is provided with a fitting hole 12a for fitting the fitting portion 5a of the shaft 5 of the roller 4 and a long hole 12b extending in the moving direction of the movable bracket 12 and penetrating the bolt 13. It has been.

[0020] A belt tension adjusting method of the belt conveyance device 1 according to the present embodiment configured as described above will be described below.

In order to assemble the belt conveyance device 1 according to the present embodiment, as shown in FIG. 3 (a), the belt 3 is stretched over the roller 4, and the guide hole 8 provided in the flat plate member 7 of the base 2 is Insert the fitting portion 5a of the shaft 5 of the roller 4. At this time, the belt 3 should be tensioned. Note that another tensioner may be provided to generate tension on the belt 3 after the belt 3 is stretched around the roller 4.

[0021] In this state, only the tension of the belt 3 acts on the roller 4, and in this way, the roller 4 is urged in one direction by the tension of the belt 3, and FIG. As shown in FIG. 2, the fitting portion 5a of the shaft 5 is disposed so as to be in close contact with the end face 8a of the guide hole 8. Since the guide hole 8 is precisely formed on the flat plate member 7 of the base 2 as described above, the roller 4 is assembled in a state of being accurately positioned with respect to the base 2 in this state, and the belt The assembled state is maintained by the tension of 3.

Next, as shown in FIG. 3 (b), the fitting portion 5a of the shaft 5 that passes through the guide hole 8 of the base 2 and protrudes to the opposite side is fitted into the fitting hole 12a. Remove the movable bracket 12 wear. In this state, the pressing bolt 14 is inserted into the opposing through holes 11 a and 12 c of the fixed bracket 11 and the movable bracket 12, and the nut 15 is fastened. At this time, the bolt 13 is loosely fastened to the screw hole 9 of the base 2 via the long hole 12b of the movable bracket 12.

[0023] Then, by increasing the fastening force of the pressing bolt 14 and the nut 15, the movable bracket 12 is attracted to the fixed bracket 11 fixed to the base 2 as shown in FIG. The shaft 5, the bearing 10, the roller 4, and the belt 3 are moved along the guide hole 8 by being fitted in the fitting hole 12a of the movable bracket 12. As a result, the belt 3 is moved in the direction in which the tension increases. Since the movable bracket 12 is provided at both ends of the shaft, the tension is increased in a balanced manner over the entire width of the belt 3 by increasing the fastening force of the two pressing bolts 14 and the nut 15 equally. The tension of the belt 3 can be adjusted so that the bias does not meander

[0024] Then, with the tension of the belt 3 adjusted, the movable bracket 12 is fixed to the base 2 by tightening and tightening the bolts 13, whereby the belt conveying device 1 can be assembled. I'll do it.

In this case, according to the belt conveyance device 1 according to the present embodiment, the state in which the shaft 5 of the roller 4 is in close contact with the end surface 8a of the guide hole 8 provided in the base 2 without attaching the movable bracket 12 during assembly. Can be maintained. Accordingly, since the roller 4 can be maintained in the positioning state at the initial stage of assembly, the subsequent tension adjustment work can be easily performed.

That is, the roller 4 can be positioned using the end surface 8a of the guide hole 8 formed in the base 2 with high accuracy as the abutting surface. Therefore, a highly accurate assembly can be performed at a low cost with a simple structure. Further, the roller 4 can be positioned without using the movable bracket 12, and the assemblability can be improved.

[0026] Further, since the movable bracket 12 does not have to be used for positioning the roller 4 at the initial stage of assembly, it is not necessary to generate a frictional force between the movable bracket 12 and the base 2 when adjusting the tension of the belt 3. . As a result, the belt tension can be easily finely adjusted. In other words, when a frictional force is applied, the movable bracket 12 is slightly moved by stick-slip. Although the small movement becomes difficult, according to the belt conveyance device 1 according to the present embodiment, it becomes possible to apply a pressing force accurately and evenly to both ends of the shaft 5 of the roller 4 that does not have such inconvenience. It is possible to easily prevent the belt 3 from meandering.

In the present embodiment, the movable bracket 12 and the fixed bracket 11 are formed in an L shape, and the tension of the belt 3 is increased by pulling the opposed portions with the pressing bolt 14 and the nut 15. Instead of this, as shown in Fig. 5 and Fig. 6, the fixed bracket I and the movable bracket 12 ^ are arranged so as to cross each other and are made to oppose each other by the pressing bolt 14 '. The tension of the belt 3 may be adjusted by increasing the pressing force so as to spread the part. The symbol W in the figure is a lock nut.

[0028] Further, in this embodiment, a force that employs the end surface 8a of the guide hole 8 as the abutting surface against which the shaft 5 of the roller 4 abuts, instead of the abutting surface that can be provided on the base 2 with high accuracy. Any other abutment surface may be employed if any.

In addition, the end face 8a of the guide hole 8 that allows the shaft 5 of the roller 4 to pass through is adopted as the abutment surface. Instead of this, a long guide groove (not shown) that is inserted without penetrating both ends of the shaft 5 is used. ) May be adopted.

Claims

The scope of the claims

[1] Base and

A belt for carrying and transporting an object to be conveyed;

A roller for applying tension to the belt;

An attachment mechanism for attaching the shaft of the roller to a base so that the position of the roller shaft can be adjusted, and the attachment mechanism is fixed to both ends of the shaft of the roller and has a long hole extending in a moving direction, and a long hole of the bracket Fastening means for fixing the bracket to the base via

A belt conveyance device in which a contact surface that abuts the shaft in a state where tension is applied to the belt is provided on the base.

[2] The belt conveyance device according to [1], wherein the base is provided with an elongated guide hole that allows the shaft to pass therethrough, and is configured by the abutting surface force and an end surface of the guide hole.

[3] The belt conveyance device according to [1], wherein the base is provided with an elongated guide groove into which an end of the shaft is inserted, and the abutting surface is constituted by an end surface of the guide groove.

[4] The belt conveyance device according to any one of claims 1 to 3, wherein the base is provided with a tension adjusting mechanism that moves the shaft in a direction to increase the tension of the belt.

[5] A belt assembly adjustment method in which a belt carrying a conveyed object is conveyed over a roller and assembled to a base.

With the roller shaft abutting against the abutting surface provided on the base, tension is applied to the belt that is stretched over the roller,

Thereafter, a belt assembly adjustment method in which the both ends of the shaft are evenly pressed to adjust the tension.