JP2022028465A - Pulley moving device and belt adjustment device - Google Patents

Abstract

To provide a technology that inhibits size increase and can adjust meandering of a belt while adjusting a tensile force of the belt.SOLUTION: A pulley moving device 2 is connected to a tail pulley around which a conveyor belt for transporting transported objects is wound and which may move in a transport direction of the conveyor belt. The pulley moving device 2 includes: a connection part 11 being a shaft-like member which extends along an axial direction and may move in the axial direction, the connection part 11 connected at one end part with an end part of a rotary shaft part of the tail pulley; a first moving part 12 which rotates around a center axis of the connection part 11 along the axial direction and reciprocates the connection part 11 in the axial direction; and a second moving part 14 which rotates around the center axis and moves the connection part 11 so that the one end part moves to the other end part side of the connection part 11 in the axial direction.SELECTED DRAWING: Figure 5

Description

The present invention relates to a pulley moving device and a belt adjusting device.

In a belt conveyor, an endless conveyor belt is generally supported in a loop by a plurality of pulleys. By rotationally driving any one of the plurality of pulleys, the belt is rotated, and the conveyed object loaded on the belt is conveyed. A belt supported by a plurality of pulleys is always tensioned.

For example, Patent Document 1 discloses an invention that is a device for continuously unloading loose objects such as ore or coal from the hold of a ship and can automatically adjust the tension of the endless belt of a conveyor. The technique described in Patent Document 1 is a configuration in which a moving pulley on which an endless belt is hung can be moved in a direction in which the tension of the endless belt changes, and the moving pulley is moved by a hydraulic cylinder in response to a change in the tension of the endless belt. There is. As a result, the tension of the endless belt can be adjusted, and the tension can always be applied to the endless belt.

Japanese Unexamined Patent Publication No. 2016-210520

However, when the pulley is moved as described in Patent Document 1, the belt may meander unless the rotation axis of the pulley is moved in parallel. When the belt meanders, it falls off the pulley, and it is necessary to take measures such as stopping the device each time. Therefore, it is necessary to separately provide a device for adjusting the meandering, but if the tension adjusting device as in Patent Document 1 is simply combined with the device for adjusting the meandering, the size of the device becomes large.

Therefore, one of the objects of the present invention is a pulley moving device capable of adjusting the meandering of the belt while suppressing the increase in size and adjusting the tension of the belt, and the pulley moving device and the belt provided with the pulley moving device. The purpose is to provide an adjusting device.

The present invention is a pulley moving device in which a conveyor belt for transporting a conveyed object is hung and connected to a pulley that is movable in the transport direction of the conveyor belt.
A shaft-shaped member that extends along the first direction and is movable in the first direction, and one end thereof is connected to a connection portion connected to the end portion of the rotary shaft portion of the pulley.
A first moving portion that rotates around the central axis of the connecting portion along the first direction and moves the connecting portion back and forth in the first direction.
A second moving portion that rotates about the central axis and moves the connecting portion so that one end thereof faces the other end side of the connecting portion in the first direction.
To prepare for.

According to the present invention, it is possible to adjust the meandering of the belt while suppressing the increase in size and adjusting the tension of the belt.

FIG. 1 is a diagram showing a usage state of the belt adjusting device. FIG. 2 is a diagram showing a usage state of the belt adjusting device. FIG. 3 is a diagram showing a state in which the rotation axis of the tail pulley is tilted. FIG. 4 is a diagram showing an overall view of the pulley moving device. FIG. 5 is a cross-sectional view taken along the line VV of FIG.

The pulley moving device according to the embodiment of the present invention is connected to, for example, one end of a rotary shaft portion of the tail pulley of the stacker. A pulley moving device is connected to each of both ends of the rotating shaft portion of the tail pulley, and the pair of pulley moving devices constitutes the belt adjusting device according to the embodiment of the present invention. The belt adjusting device is a device for applying tension to the conveyor belt hung on the tail pulley and adjusting the meandering of the conveyor belt.

1 and 2 are views showing a usage state of the belt adjusting device 1. FIG. 1 is a view seen from the rotation axis direction of the tail pulley 100. FIG. 2 is a view seen from the upper surface of the tail pulley 100. In FIG. 2, the conveyor belt 101 is shown by a broken line.

Both ends of the rotating shaft portion 100A of the tail pulley 100 are held by a pair of plummer blocks 105. The pair of plummer blocks 105 are provided so as to be movable along the direction in which the tension of the conveyor belt 101 changes, in other words, the transport direction of the conveyor belt 101.

In the transport direction, the adjusting device stand 110 is installed at a position opposite to the conveyor belt 101 with respect to the plummer block 105. The belt adjusting device 1 is fixed to the adjusting device stand 110.

The belt adjusting device 1 includes a pair of pulley moving devices 2 connected to each of the pair of plummer blocks 105. The belt adjusting device 1 includes a tension adjusting unit that applies tension to the conveyor belt 101 and a meandering adjusting unit that adjusts the meandering of the conveyor belt 101.

The tension adjusting unit pulls the tail pulley 100 by moving the rotation shaft portion 100A of the tail pulley 100 in a direction away from the conveyor belt 101 (hereinafter referred to as a separation direction) by the pulley moving device 2. More specifically, the pulley moving device 2 pulls the plummer block 105 by the force of the spring 14B described later. As a result, the tail pulley 100 is pulled toward the belt adjusting device 1, and tension is applied to the conveyor belt 101.

The meandering adjusting portion moves the end portion of the rotating shaft portion 100A of the tail pulley 100 back and forth along the transport direction by the pulley moving device 2. By moving both ends of the rotary shaft portion 100A of the tail pulley 100 in the transport direction, the rotary shaft portion 100A of the tail pulley 100 is tilted with respect to the transport direction.

FIG. 3 is a diagram showing a state in which the rotation shaft portion 100A of the tail pulley 100 is tilted. In FIG. 3, the conveyor belt 101 is not shown. Further, the solid line P1 in FIG. 3 indicates a direction orthogonal to the transport direction, and the alternate long and short dash line P2 indicates a direction along the axis of the rotation shaft portion 100A. As shown in FIG. 3, by moving only one of the pair of plummer blocks 105 by one pulley moving device 2, the rotation shaft portion 100A of the tail pulley 100 can be tilted with respect to the transport direction. When the conveyor belt 101 meanders, the meandering of the conveyor belt 101 can be adjusted by adjusting the inclination of the rotating shaft portion 100A of the tail pulley 100.

The specific configuration of the pulley moving device 2 will be described in detail below.

FIG. 4 is a diagram showing an overall view of the pulley moving device 2. FIG. 5 is a cross-sectional view taken along the line VV of FIG.

The pulley moving device 2 includes a cylindrical support portion 10 having a cylindrical shape. The pulley moving device 2 is used by being fixed to the adjusting device stand 110 in a posture in which the cylindrical central axis of the cylindrical support portion 10 substantially coincides with the transport direction of the conveyor belt 101. Hereinafter, the direction of the cylinder support portion 10 along the central axis of the cylinder is referred to as an "axial direction" and corresponds to the first direction of the present invention. The cylindrical support portion 10 is movably supported in the axial direction by a fixing portion 13 described later, which is a member for fixing to the pedestal 110 for the adjusting device.

The pulley moving device 2 includes a connecting portion 11 connected to the plummer block 105. The connecting portion 11 has a tubular shape extending along the axial direction, is arranged inside the cylindrical support portion 10, is movable in the axial direction relative to the cylindrical support portion 10, and is a cylindrical central axis. It is not possible to rotate around. A first moving portion 12, which will be described later, is located inside the cylindrical connecting portion 11.

The connecting portion 11 is provided so that one end thereof protrudes from the cylindrical support portion 10. A plummer block 105 is connected to one end thereof. A connecting portion 11A is provided at the other end of the connecting portion 11. The connecting portion 11A has a cylindrical shape, and a screw groove fitted with a screw groove of the first moving portion 12, which will be described later, is provided on the inner peripheral surface thereof.

The pulley moving device 2 includes a first moving portion 12 that moves the connecting portion 11 back and forth along the axial direction. In FIG. 5, the first moving portion 12 is not represented by a cross section for visual recognition of the drawing. The first moving portion 12 has a cylindrical shape and is held by a holding portion 12A provided at the second end portion of the cylindrical support portion 10. The first moving portion 12 is rotatably held with respect to the cylindrical support portion 10 about the cylindrical central axis of the cylindrical support portion 10 by the holding portion 12A. The first moving portion 12 is held in a state where one end thereof protrudes from the holding portion 12A. The operator can rotate the entire first moving portion 12 by rotating the protruding one end portion.

A screw groove is provided on the outer peripheral surface of the first moving portion 12. The screw groove of the first moving portion 12 and the screw groove provided on the inner peripheral surface of the connecting portion 11A are engaged with each other and are fitted to the connecting portion 11A by a screw action.

The connecting portion 11 is not fixed to the cylindrical support portion 10, is movable in the axial direction relative to the cylindrical support portion 10, and cannot rotate about the central axis of the cylinder. There is. Therefore, when the first moving portion 12 rotates, the connecting portion 11 moves in the axial direction due to the screwing action, and the connecting portion 11 expands and contracts with respect to the cylindrical support portion 10. By expanding and contracting the connecting portion 11, the plummer block 105 to which the connecting portion 11 is connected moves in the transport direction.

The pulley moving device 2 includes a fixing portion 13 that supports the cylindrical support portion 10 so as to be movable in the axial direction. The fixing portion 13 is a member for fixing the pulley moving device 2 to the pedestal 110 for the adjusting device, and is a tubular member provided with a flange on the outer peripheral surface. The fixing portion 13 is not fixed to the cylindrical support portion 10, and is movable in the axial direction along the outer peripheral surface of the cylindrical support portion 10. Further, the flange of the fixing portion 13 is fixed to the adjusting device stand 110. That is, when the pulley moving device 2 is used, the fixing portion 13 does not move relative to the adjusting device pedestal 110, and the cylindrical support portion 10 does not move relative to the fixing portion 13 and the adjusting device pedestal 110. It is designed to move relatively in the axial direction.

The pulley moving device 2 includes a second moving unit 14. The second moving portion 14 moves the connecting portion 11 connected to the plummer block 105 in the separating direction when the pulley moving device 2 is used. The second moving portion 14 has a moving screw portion 14A and a spring 14B.

The moving screw portion 14A is provided on the outer peripheral surface of the cylindrical support portion 10 at a distance in the axial direction from the fixing portion 13. More specifically, the moving screw portion 14A is arranged at a position opposite to the tail pulley 100 with respect to the fixing portion 13 in the axial direction. In the following description, the end of the cylindrical support portion 10 on the side where the fixing portion 13 is provided is referred to as the first end portion, and the end portion of the cylindrical support portion 10 on the side where the second moving portion 14 is provided is referred to as the second end portion. Say. Threaded grooves are provided on the outer peripheral surface of the cylindrical support portion 10 and the inner peripheral surface of the moving screw portion 14A, respectively. The moving screw portion 14A is connected to the cylindrical support portion 10 by a screw action. As a result, the moving screw portion 14A rotates to move in the axial direction along the outer peripheral surface of the cylindrical support portion 10.

The spring 14B is a spring spring provided between the fixing portion 13 and the moving screw portion 14A. The spring 14B is provided so as to press the fixing portion 13 and the moving screw portion 14A in opposite directions by elastic force when the moving screw portion 14A moves toward the fixing portion 13 and contracts. When the pulley moving device 2 is used, the fixing portion 13 is fixed to the adjusting device stand 110. Therefore, the moving screw portion 14A moves in the direction away from the fixing portion 13, that is, in the separating direction due to the pressing force from the spring 14B.

As the moving screw portion 14A moves, the cylindrical support portion 10 and the connecting portion 11 also move in the separating direction. As a result, the connecting portion 11 pulls the plummer block 105, that is, the tail pulley 100 toward the pulley moving device 2. In this way, by pulling the tail pulley 100 toward the pulley moving device 2 side by the elastic force of the spring 14B, tension is applied to the conveyor belt 101 applied to the tail pulley 100.

A stopper (prevention portion) 15 is provided between the fixing portion 13 and the first end portion of the cylindrical support portion 10. The stopper 15 is fixed to the cylindrical support portion 10. The stopper 15 prevents the cylindrical support portion 10 from coming off from the fixing portion 13 when the moving screw portion 14A moves due to the pressing force of the spring 14B.

The operation of applying tension to the conveyor belt and the operation of adjusting the meandering of the conveyor belt in the belt adjusting device 1 provided with the pulley moving device 2 configured as described above will be described below. ..

When the belt adjusting device 1 is used, the fixing portion 13 of the pulley moving device 2 is fixed to the adjusting device stand 110, and the connecting portion 11 is fixed to the plummer block 105 (see FIG. 1 and the like). In this state, when the moving screw portion 14A of each of the pair of pulley moving devices 2 is moved toward the fixing portion 13, the spring 14B contracts. Then, the moving screw portion 14A moves in the direction away from the fixing portion 13, that is, in the separating direction due to the pressing force of the contracted spring 14B. Along with this, the cylindrical support portion 10 and the connecting portion 11 also move in the separating direction. As a result, the pair of plummer blocks 105, that is, the entire tail pulley 100 is pulled toward the belt adjusting device 1. Then, tension is applied to the conveyor belt 101 hanging on the tail pulley 100. When adjusting the tension, it is preferable to pull the tail pulley 100 by a pair of pulley moving devices 2 so that the rotation axes thereof move in parallel.

In the case of meandering adjustment, the plummer block 105 to which the connecting portion 11 is connected can be moved in the transport direction by rotating the first moving portion 12 and expanding and contracting the connecting portion 11. As a result, as described with reference to FIG. 3, the rotation axis of the tail pulley 100 can be tilted with respect to the transport direction, and the meandering of the tail pulley 100 can be adjusted.

As described above, according to the pulley moving device 2 of the present embodiment, tension adjustment and meandering adjustment can be realized by one device. As a result, it is not necessary to separately install a device for realizing tension adjustment and a device for realizing meandering adjustment in the vicinity of the tail pulley 100, and space saving can be realized. Further, since the pulley moving device 2 is provided along the cylindrical central axis of the cylindrical support portion 10 and has a configuration in which serpentine adjustment and tension adjustment are performed by rotation about the central axis thereof, the pulley moving device 2 is configured to adjust the meandering and tension in the radial direction of the cylindrical central axis. The increase in size is suppressed.

1 Belt adjustment device 2 Pulley moving device 10 Cylindrical support part 11 Connection part 12 First moving part 12A Holding part 13 Fixed part 14 Second moving part 14A Moving screw part 14B Spring 15 Stopper 100 Tail pulley 100A Rotating shaft part 101 Conveyor belt 105 Plummer block 110 Adjustment device mount

Claims (5)

A pulley moving device on which a conveyor belt for transporting a conveyed object is hung and connected to a pulley that is movable in the transport direction of the conveyor belt.
A shaft-shaped member that extends along the first direction and is movable in the first direction, and one end thereof is connected to a connection portion connected to the end portion of the rotary shaft portion of the pulley.
A first moving portion that rotates around the central axis of the connecting portion along the first direction and moves the connecting portion back and forth in the first direction.
A second moving portion that rotates about the central axis and moves the connecting portion so that one end thereof faces the other end side of the connecting portion in the first direction.
A pulley moving device. A cylindrical support portion that has a cylindrical shape extending along the first direction and has the connection portion inserted inside to support the connection portion so as to be movable along the first direction.
A fixing portion fixed to a pedestal on which the pulley moving device is mounted, located on the outer peripheral surface of the cylindrical support portion, and movably supporting the cylindrical support portion along the first direction.
Equipped with
The second moving part is
In the first direction, a moving screw portion which is arranged at a position opposite to the pulley with respect to the fixing portion and is fitted to the outer peripheral surface of the cylindrical support portion by a screw action.
In the first direction, a spring provided between the moving screw portion and the fixing portion, and
Have,
The moving screw portion rotates and approaches the fixing portion while compressing the spring by the screwing action.
The pulley moving device according to claim 1. The connection portion has a cylindrical shape extending along the first direction.
The first moving portion has an axial shape extending along the first direction, is inserted inside the connecting portion, and is fitted to the connecting portion by a screw action.
The connecting portion moves along the first direction due to the screwing action.
The pulley moving device according to claim 2. A preventive portion that prevents the cylindrical support portion from falling out of the fixed portion,
2. The pulley moving device according to claim 2 or 3. A belt adjusting device in which the pulley moving device according to any one of claims 1 to 4 is provided at both ends of the pulley.

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