KR100577678B1 - Pusher device using a cam follower in a conveyer system - Google Patents

Abstract

The present invention relates to a pusher device using a cam follower in a conveying system, comprising: a main body unit for pushing an object, a driving unit for driving the main body part back and forth along the conveying direction of the object, and a vertical height along the conveying direction of the object It includes a cam plate formed with a guide hole downward. The main body unit includes a pusher block for pushing the object, a cam follower inserted into a guide hole of the cam plate and guided along the guide hole, and installed to axially rotate against the cam plate, and a front end portion of the pusher. And a first arm connected to the block and having a rear end connected to the cam follower.

Pusher, Cam, Transfer, Pusher, Cam

Description

PUSHER DEVICE USING A CAM FOLLOWER IN A CONVEYER SYSTEM}

1 is an illustration of a pusher device used in a conventional transport system.

2 is a perspective view of a pusher device according to a preferred embodiment of the present invention.

3 is a plan view of a pusher device according to a preferred embodiment of the present invention.

4 is a side view of a pusher device according to a preferred embodiment of the present invention.

5 is a front view of a pusher device according to a preferred embodiment of the present invention.

6 and 7 are operational state diagrams of the pusher device according to a preferred embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: pusher body 105: pusher base

110: connection block 115: hinge bracket

120: pusher shaft 130: first arm

135: front end of the first arm 137: rear end of the first arm

140: second arm 145: front end of the second arm

150: pusher block 160: cam follower

200: LM guide 300: pneumatic cylinder

310: cylinder shaft 400: cam plate

410: guide hole

The present invention relates to a pusher device of a conveying system, and more particularly to a pusher device with a simplified structure using a cam follower.

In a typical conveying system, when an object is transported through the conveyor, the object can be accurately transported within the conveyor section, but from the end of the conveyor to the position where the object is placed, or from the position of the object to the start position of the new conveyor. Since the conveyor does not function properly, the object is transported by a separate pusher device.

For example, FIG. 1 shows a "semiconductor device transfer system" (published May 29, 2002) filed by the applicant, which is a boat transported to a first conveyor 20 (a device for storing semiconductor elements). Is configured to actuate the guide 60 attached perpendicular to the pusher cylinder 40 to move the to the second conveyor 50.

However, when the pusher device is configured as shown in FIG. 1, since the space for the pusher is additionally required in addition to the conveyor installation space, it is a factor of reducing the space efficiency in the transport system having the space limitation. Meanwhile, although the pusher device of FIG. 1 may be installed in the space between the belts of the first conveyor (boat movement path of the first conveyor), a method of improving space efficiency may be considered. In this case, the guide 60 of the pusher device may be considered. May protrude vertically, which may interfere with the transport of the boat by the first conveyor. And, in order to solve this problem, there is a problem that a vertical driver for selectively vertically projecting the guide 60 of the pusher in the state in which the transfer of the first conveyor is completed so as not to disturb the transfer of the first conveyor, is required.

In order to solve the above-mentioned problems, the present invention provides a pusher device that can be installed on a conveyor transfer path and does not interfere with conveyor transfer, while increasing the space efficiency of the transfer system, and inherently driving the pusher device. In addition, the object is to provide a pusher device that does not require a separate driver.

In order to achieve the above object, according to an aspect of the present invention, there is provided a pusher device for pushing and transporting an object, a body portion for pushing the object, and a drive unit for driving the body portion back and forth along the conveying direction of the object And a cam plate having a guide hole in which a vertical height is lowered along the conveying direction of the object. The main body unit includes a pusher block for pushing the object, a cam follower inserted into a guide hole of the cam plate and guided along the guide hole, and installed to axially rotate against the cam plate, and a front end portion of the pusher. And a first arm connected to the block and having a rear end connected to the cam follower.

At this time, the pusher block may be configured to rotate upward by the operation of the first arm as the main body portion advances. In addition, the guide hole of the cam plate is a first section to lower the vertical height of the cam follower along the conveying direction of the object, and a second to maintain the vertical height of the cam follower downward from the first section The pusher block may be configured to be aligned to a position for pushing the object when the cam follower is located in the second section of the cam plate guide hole.

The main body may further include a shaft having one end connected to the rotating shaft of the first arm, and a bracket for fixing the shaft to the main body so as to be rotatable at a constant vertical height. And a second arm connected to the other end and having a front end connected to the pusher block, wherein the second arm is configured to rotate the pusher block upward in association with the operation of the first arm.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings, wherein like reference numerals refer to like elements throughout.

2 to 5 are respectively a perspective view, a plan view, a side view, and a front view of the pusher device according to the preferred embodiment of the present invention.

2 to 5, a pusher device according to a preferred embodiment of the present invention includes a pusher body 100, an LM guide (Linear Motion Guide) 200 that linearly guides the pusher body in a feed direction, It is comprised by the pneumatic cylinder 300 which is provided in parallel with an LM guide, and drives the pusher main body back and forth, and the cam plate 400 for controlling the position of the pusher block (it mentions later) of a pusher main body.

First, looking at the configuration of the pusher body 100, the pusher base 105 of the pusher body 100 is configured such that the lower end is engaged with the LM guide 200 described above. In addition, one side of the pusher base 105 is provided with a connection block 110 that is connected to the cylinder shaft 310 of the pneumatic cylinder 300, the pusher base 105 by the operation of the pneumatic cylinder LM guide 200 Is configured to move forward and backward along

A pair of hinge brackets 115 are installed on both sides of the upper end of the pusher base 105 to face each other, and the pusher shaft 120 faces the cam plate 400 through a through hole facing the hinge bracket 115. It is inserted rotatably in the direction. At this time, the pusher shaft 120 can be inserted into the bush so that the rotation more easily.

First and second arms 130 and 140 are connected to both ends of the pusher shaft 120, and the first arm 130 has a front end 135 and a rear end 137 to have a V shape. Consists of. The pusher block 150 for pushing and transporting a transport object is fastened to the front end portion 135 of the first arm and the front end portion 145 of the second arm 140. Push the object in contact with the conveying object during operation. On the other hand, a cam follower 160 is connected to the rear end 137 of the first arm 130 in a direction parallel to the pusher shaft 120.

On one side (first arm side) of the LM guide 200 described above, the cam plate 400 is spaced apart along the LM guide 200. A guide hole 410 is formed in the wall surface of the cam plate 400 along the longitudinal direction of the LM guide 200, and the cam follower 160 is movable back and forth to the guide hole 410 of the cam plate. It is fitted.

5 and 6 specifically show an operating state of the pusher device according to a preferred embodiment of the present invention.

As shown in FIGS. 5 and 6, the guide hole 410 may include a first section in which the vertical position with respect to the ground gradually decreases as the shaft 310 of the pneumatic cylinder described above moves from the retracted position to the advanced position ( 415 and a second section 417 which maintains a vertical low point position of the first section. When the pusher base 105 is advanced by the operation of the pneumatic cylinder 300, the first arm 130 connected to the cam follower 160 while the cam follower 160 is guided along the first section 415. Rear end 137 is lowered. At this time, since the vertical position with respect to the ground is maintained constant by the pusher shaft 120, the first arm 130 rotates when the rear end 137 of the first arm descends. In addition, the second arm 140 connected to the other end of the pusher shaft 120 also rotates together. As the first and second arms 130 and 140 rotate, the pusher block 150 attached to the front end 135 of the first arm and the front end 145 of the second arm is the first arm described above. And by the rotation of the second arm. Subsequently, while the cam follower 150 is guided along the second section 417, the pusher block 150 remains in a raised position in the above-described first section while being aligned with the position for pushing the object. Move forward.

When the cam follower 160 proceeds to the second section through the first section of the guide hole 410 by the operation of the pneumatic cylinder 300, the cam follower 160 is in contact with the front end of the first arm and the front end of the second arm As the pusher block 150 is raised, the surface that finally comes into contact with the object is perpendicular to the ground, and is in a state capable of transporting the object along the forward direction of the pusher device. Subsequently, while the cam follower 160 proceeds through the second section of the guide hole 410, the pusher block 150 maintains the forward direction as shown in FIG. 6.

Therefore, when the conveyor (not shown) of FIG. 1 transfers an object to the front position of the pusher block 150 corresponding to the end point (or second end point) of the guide hole 410, the present invention may be used. The object may be transported by the distance corresponding to the second section of the guide hole 410.

On the other hand, in the retracted position of the pusher body 100, as shown in Figure 5, the pusher block maintains the lowered state toward the ground. Therefore, the ground height of the pusher device in the retracted position is lower than the forward position, the vertical position of the pusher block 150 rises to push the object only during the forward operation of the pusher device, and thus the pusher device including the pusher body 100. Even if the whole is installed on the conveyor conveyance path, it can be configured so that it does not interfere with conveyor conveyance.

Although the preferred embodiment according to the present invention has been described above, this is merely exemplary and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. For example, those skilled in the art will understand that the pusher device according to the present invention can be applied not only to the semiconductor transfer system described in the prior art but also to the general transfer system. Therefore, the protection scope of the present invention should be defined by the following claims.

 As described above, according to the present invention, since the vertical position of the pusher block rises and pushes the object during the forward operation of the pusher device, even if it is installed on the conveyor conveying path, it does not interfere with the conveying conveyance. Can be increased.

In addition, since the vertical position of the cam follower is controlled along the guide hole of the cam plate in conjunction with the forward and backward operation of the pneumatic cylinder to control the alignment position of the pusher block, there is no need for a separate vertical drive device for the pusher block. Therefore, the pusher device can be implemented in a space-efficient manner, there is an advantage that can also reduce the implementation cost.

Claims (9)

A pusher device for pushing and transporting an object, A main body for pushing an object, A driving unit which drives the main body back and forth along the conveying direction of the object; A cam plate having a guide hole having a vertical height downward in a conveying direction of the object, The main body portion A pusher block for pushing the object; A cam follower inserted into the guide hole of the cam plate and guided along the guide hole; A first arm installed to be axially rotated opposite the cam plate, a front end connected to the pusher block and a rear end connected to the cam follower Pusher device comprising a. The method of claim 1, And the driving part is a pneumatic cylinder having a cylinder shaft connected to the main body to drive the main body back and forth. The method of claim 1, And a LM guide for guiding the main body in the conveying direction of the object. The method of claim 1, The guide hole of the cam plate may include a first section that lowers the vertical height of the cam follower along a conveying direction of the object, and a second section that maintains the vertical height of the cam follower downward from the first section. Including a pusher device. The pusher device according to claim 4, wherein the pusher block is aligned to a position for pushing the object when the cam follower is located in a second section of the cam plate guide hole. The method according to any one of claims 1 to 5, And the pusher block is rotated upward by the operation of the first arm as the body portion advances. The main body according to any one of claims 1 to 5, wherein A shaft having one end connected to a rotation axis of the arm; And a bracket for fixing the shaft to the main body to be rotatable at a constant vertical height. The method of claim 7, wherein the body portion A second arm connected to the other end of the shaft and having a front end connected to the pusher block; And the second arm rotates the pusher block upward in conjunction with operation of the first arm. The method according to any one of claims 1 to 5, And the pusher device is installed on a path through which the conveying object is conveyed.

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