JPS6330841Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is applicable, for example, to a device between a parts conveyor and an automatic assembly machine, when transporting parts on the conveyor to a fixed supply position of the automatic assembly machine. This relates to a cam-type conveyance device used in.

[Technical background of the invention and its problems]

For example, when taking out a large number of parts arranged two-dimensionally on a conveyor to a fixed supply position of an automatic assembly machine, the conveyance distance of the parts can be changed one by one or every few parts, and the distance can be kept constant. A transport device that can return to the original position is required.

On the other hand, in this type of conveyance device, the cam drive is excellent in high speed, predictability of operation patterns, smoothness of operation, etc. However, the cam itself has
There is a problem in that the transport distance cannot be changed by changing the displacement position.

[Purpose of invention]

The present invention provides a cam-type conveyance device that is cam-driven but can change the conveyance distance of parts, etc. one by one or every few pieces, and can always return to the original position even if the conveyance distance is changed. This is what I am trying to do.

[Summary of the idea]

The cam-type conveyance device of the present invention rotatably supports the middle part of the L-shaped lever by an L-shaped lever support shaft on a reciprocating member that is reciprocated by a cam, and one end of the L-shaped lever At the same time, a slider is rotatably supported by a slider support shaft at the other end of the L-shaped lever, and this slider is connected to a guide member for variable stroke. The rotary member for moving the origin is slidably fitted into the reciprocating member, and the rotary member for moving the origin is positioned at a fixed position concentric with the L-shaped lever support shaft in the original position state when the reciprocating member switches reciprocatingly. The guide member is rotatably provided, and the guide member is mounted on the guide member support shaft at a position concentric with the slider support shaft in the original position when the reciprocating member switches reciprocatingly in the origin moving rotary member. It is rotatably provided, and is characterized in that an interlocking mechanism is provided between the rotation member support shaft and the guide member support shaft to rotate both support shafts in opposite directions at the same angle. By rotating the guide member, the conveyance stroke of the output member changes,
Further, by rotating the origin moving rotating member, the origin position of the output end of the output member is changed.

[Example of idea]

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

As shown in FIG. 1, the base end of a cam lever 1 is rotatably supported via a support shaft 2 by a bearing 3 at a fixed position, and a shaft is rotatably supported in the middle of the cam lever 1. The supported cam follower roller 4 is pressed against the circumferential surface of the cam 6 by the tensile force of the spring 5. This cam 6 has a cam shaft 7 rotatably supported in a fixed position.
It rotates by.

A slider 8 is rotatably supported at the tip of the cam lever 1, and the slider receiving portion 10 is formed at the left end of a connecting rod 9 that serves as a reciprocating member.
It is slidably fitted into the The connecting rod 9 is the guide plate 1
1, and an L-shaped lever 13 is connected to the right end of the connecting rod 9 by an L-shaped lever support shaft 12.
The middle part of the shaft is rotatably supported. A slider 14 is rotatably supported on the lower tip of this L-shaped lever 13, and this slider 14 is attached to a slider receiver formed at the left end of an actuating plate 15 that serves as an output member for conveyance. Part 1
6 in a slidable manner. The actuating plate 15 is also slidably fitted into the guide plate 17, and guides the conveying output end 18 at the tip so that it moves linearly. This output end 18 is provided with a component gripping portion or the like.

Further, a slider 20 is rotatably supported by a slider support shaft 19 at the lateral tip of the L-shaped lever 13, and this slider 20 is supported by a guide plate 21 as a guide member for variable stroke. It is slidably fitted into the Further, when the connecting rod 9 reciprocates, the rotating member support shaft 22 is set at a fixed position concentric with the L-shaped lever support shaft 12 in the original position state (the state moved to the leftmost position shown in FIG. 1). A shuttle plate 23 serving as a rotating member for moving the origin is rotatably provided, and a guide member is placed on the shuttle plate 23 at a position concentric with the slider support shaft 19 in the original position state (the state shown in FIG. 1). The guide plate 21 is rotatably provided with the support shaft 24 as a fulcrum. Therefore, the support shaft 12,
Needless to say, the distance between the centers of the support shafts 22 and 24 is equal to the distance between the centers of the support shafts 22 and 24.

As shown in FIG. 2, the support shaft 22 of the shuttle plate 23 is rotatably fitted into the hole 26 of the bearing plate 25, and both support shafts are provided between the support shaft 22 and the support shaft 24. An interlocking mechanism 27 is provided that rotates the shafts 22 and 24 in opposite directions by the same angle. That is, the timing pulley 28 is integrally fitted to the support shaft 24 of the guide plate 21, and the support shaft 22 of the shuttle plate 23 is fitted integrally with the timing pulley 28.
A timing pulley 29 is rotatably fitted to the timing pulleys 28 and 29, an endless timing belt 30 is wound around both timing pulleys 28 and 29, and a lever 31 is rotatably fitted to the support shaft 22 of the shuttle plate 23. At the same time, this lever 31 and the timing pulley 29 are fixed so that they can rotate together. Timing pulleys 28 and 29 must have the same diameter. The support shaft 22 and lever 31 of the shuttle plate 23 are rotated by a servo motor, a stepping motor, or manually via gears, links, etc.

Next, the operation will be explained.

When the cam 6 rotates, the cam lever 1 is swung left and right about the support shaft 2 via the cam follower roller 4.

The cam lever 1 further moves a connecting rod 9 regulated by a guide plate 11 to the left and right via a slider 8.

The L-shaped lever 13 is moved by the connecting rod 9 and is regulated by the guide plate 21 to swing about the support shaft 12.

The operating plate 15 is regulated by a guide plate 17 and is moved left and right by an L-shaped lever 13 via a slider 14.

The stroke of the output end 18 of the actuating plate 15 is the same as the movement amount of the connecting rod 9 when the guide plate 21 is horizontal, but when the guide plate 21 is on the upper side (upwardly to the right around the support shaft 24) In this case, the stroke of the output end 18 is greater than the amount of movement of the connecting rod 9. Also, when it is on the lower side, it decreases. The rotation of the guide plate 21 about the support shaft 24 can be performed independently of the shuttle plate 23 by rotating the lever 31. In this way, output end 1
If you want to change only the stroke of 8 but not the return origin position, change the spindle 2 of the shuttle plate 23.
Fix 2 without rotating it. For example, if the shuttle plate 23 is fixed in a horizontal position in FIG. 1, the origin position of the output end 18 is maintained at A.

Further, when this support shaft 22 is rotated by the stepping motor or the like, and the shuttle plate 23 is swung clockwise (direction as shown) from the horizontal position,
The origin position moves to B on the left, and moves to C on the right when rocking counterclockwise. In this manner, even if the return origin position of the output end 18 changes due to rotation of the shuttle plate 23, if the lever 31 is fixed, the stroke of the output end 18 will not change. This is because when the shuttle plate 23 rotates, the rotation generated between the timing pulley 29, which is fixed together with the lever 31, and the support shaft 22 of the shuttle plate 23 is transferred to the support shaft 22 of the guide plate 21 via the timing belt 30.
4, and this support shaft 24 rotates in the opposite direction by the same angle as the rotation angle of the support shaft 22 of the shuttle plate 23, so that the inclination angle of the guide plate 21 is always kept constant, and the guide plate 21 As shown in FIG. 1, since it moves in parallel, even if the return origin position of the output end 18 changes, the stroke does not change. When changing this stroke, use the lever 31 as mentioned before.
Rotate.

FIG. 3 shows that the guide plate 21 is rotated stepwise from the bottom to the top every time the connecting rod 9 makes one reciprocation, and the stroke of the output end 18 is gradually increased, and the shuttle plate 23 is rotated every third reciprocation. The return origin position of the output end 18 is set to B, A, and C.
It shows that it changes.

As a result, for example, as shown in FIG. 4, the parts a, b, and c on the conveyor 32 can be conveyed to three different parts supply positions 33, 34, and 35 according to their type.

[Effect of idea]

According to the present invention, the middle part of the L-shaped lever is rotatably supported by the L-shaped lever support shaft on the reciprocating member that is reciprocated by the cam, and conveyed to one tip of the L-shaped lever. At the same time as connecting the output member for
A slider is rotatably supported at the other end of the L-shaped lever by a slider support shaft, and this slider is slidably fitted into a guide member for variable stroke. Since the member is provided to be rotatable about the guide member support shaft, by adjusting the rotation of the guide member, as the reciprocating member moves, the L-shaped lever moves along with the reciprocating member. The stroke of the output member can be changed according to the inclination angle of the guide member by moving and rotating along the guide member using the L-shaped lever support shaft as a fulcrum, for example, by changing the conveyance distance of parts to an automatic assembly machine. Suitable for cases where different parts are different. Furthermore, a rotating member for moving the origin is rotatably provided at a predetermined position concentric with the L-shaped lever supporting shaft in the original position state when the reciprocating member switches reciprocatingly, using the rotating member supporting shaft as a fulcrum. In the movable rotary member, the guide member is rotatably provided at a position concentric with the slider support shaft in the original position when the reciprocating member switches back and forth, using the guide member support shaft as a fulcrum. When the movable rotary member is not rotated, the guide member support shaft is supported in a fixed position and is concentric with the slider support shaft in the original position when the reciprocating member switches back and forth. Even if the stroke of the output member is changed by rotating the slider, the slider support shaft in the original position does not move, the L-shaped lever returns to a constant posture in the original position, and the output member remains constant. can return to its original position,
For example, this can be applied when the supply position of parts to an automatic assembly machine is constant, or when the pick-up position of parts on a conveyor is constant, and when the rotating member for moving the origin is rotated, the guide member support shaft moves, and the slider support shaft that is concentric with it in the original position also moves, and the L-shaped lever in the original position changes its rotation, so that the origin of the output member can be moved. Moreover, in this case, since an interlocking mechanism is provided between the rotation member support shaft and the guide member support shaft to rotate both support shafts in opposite directions by the same angle, even if the rotation member for moving the origin is rotated, Since the guide member always moves in parallel (at the same angle of inclination), the stroke of the output member does not change, and the stroke of the output member can be changed independently by operating the interlocking mechanism. As described above, according to the present invention, the origin movement and the variable stroke adjustment can be controlled separately so that they do not influence each other.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the cam-type conveyance device of the present invention, FIG. 2 is a sectional view taken along the line -- in FIG.
FIG. 3 is an explanatory diagram showing the stroke of the output end and variation of the origin position, and FIG. 4 is a plan view showing an example of application of the present invention. 6... Cam, 9... Connecting rod as a reciprocating member, 12... L-shaped lever support shaft, 13... L-shaped lever, 15... Actuation plate as a conveyance output member, 1
9... Slider support shaft, 20... Slider, 21... Guide plate as a guide member, 22... Rotating member support shaft,
23... Shuttle plate as a rotating member for moving the origin, 24... Guide member support shaft, 27... Interlocking mechanism.

Claims (1)

[Scope of utility model registration request] The middle part of the L-shaped lever is rotatably supported by an L-shaped lever support shaft on a reciprocating member that is reciprocated by a cam, and a conveyance output member is connected to one tip of this L-shaped lever. At the same time, a slider is rotatably supported by a slider support shaft at the other end of the L-shaped lever, and this slider is slidably fitted into a guide member for variable stroke; A rotating member for moving the origin is rotatably provided at a predetermined position concentric with the L-shaped lever supporting shaft in the original position when the reciprocating member switches back and forth, using the rotating member supporting shaft as a fulcrum, and the origin is moved. In the rotary member for reciprocation, the guide member is rotatably provided at a position concentric with the slider support shaft in the original position when the reciprocating member switches back and forth, with the guide member support shaft as a fulcrum, A cam-type conveying device characterized in that an interlocking mechanism is provided between a member support shaft and the guide member support shaft to rotate both support shafts in opposite directions at the same angle.