JP2647167B2 - Stopper device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stopper device for stopping an article conveyed on a conveyor or the like at an appropriate position.

[Conventional technology]

Conventionally, free flow conveyors are often used to convey articles such as pallets, and a stopper device that moves up and down at a stop position is used to stop a pallet that has been conveyed on the free flow conveyor. ing.

A conventional stopper device includes a moving base that moves up and down by a pneumatic cylinder or the like, a stopper member that is rotatably mounted on the moving base with a shaft pin and that rotates in a buffering direction when a conveyed object comes into contact with the moving base, and a stopper. And a buffering member that buffers the rotation of the member in the buffering direction and urges the stopper member in a direction opposite to the buffering direction.

In such a stopper device, when the pallet comes into contact with the stopper member when the moving base is at the rising end, the stopper member rotates, whereby the cushioning effect of the cushioning member is exerted, and the pallet receives impact. Stop with no state.

[Problems to be solved by the invention]

However, in the above-described conventional stopper device, after the pallet has passed, the stopper member and the buffer member need to return to the original position or state. A return spring member is mounted separately from the member. Therefore, after the pallet comes into contact with the stopper member and stops, the pallet also rebounds and retreats with the automatic return of the cushioning member or the spring member, so that the pallet stops at an unstable position.

The present invention has been made in view of the above circumstances, and has as its object to provide a stopper device that eliminates bouncing after a conveyed object such as a pallet stops and can provide a stable stop position.

[Means for solving the problem]

The present invention, in order to solve the above problems, a moving base,
A cylinder device for moving the moving base between a stop operation position for stopping a conveyed object and a passing operation position for passing the conveyed object; and the moving base provided in parallel with and integral with the cylinder device. A guide member that guides the movement of the moving base, a stopper member that is rotatably attached to the moving base by a shaft pin, and that is in contact with the conveyed object when in the stop operation position and thereby rotates in the buffering direction; A buffer member for buffering the rotation of the stopper member in the buffering direction and urging the stopper member in a direction opposite to the buffering direction, wherein the stopper member is provided with a locking portion. A direction opposite to the buffering direction of the stopper member by engaging with the locking portion at a position where the stopper member is rotated in the buffering direction and is rotatably provided with respect to the moving base. A locking claw that regulates the rotation of the locking device, and a release member that is fixed to the cylinder device and that releases the engagement of the locking claw with the stopper member in the passing operation position. The feature is constituted.

(Operation)

When the moving base is at the stop operation position, the conveyed object comes into contact with the stopper member. When the conveyed object comes into contact with the stopper member, the stopper member rotates in the buffering direction, and at this time, a buffering action is exerted by the buffering member,
The conveyed product stops with a small impact.

When the stopper member rotates in the buffering direction, the locking portion engages with the locking claw at the rotated position, thereby preventing the stopper member from returning in the direction opposite to the buffering direction.

When the moving base is moved to the passing operation position, the stopped pallet is conveyed again, the locking claw is disengaged from the locking portion by the release member, and the stopper member and the cushioning member are returned to their original positions. Return to

The cylinder device moves the movable base between a stop operation position and a passing operation position.

The guide member holds the movable base so as to be movable and non-rotatable, and reinforces the cylinder device by receiving a reaction force when the conveyed object comes into contact with the stopper member.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional front view of a stopper device 10 according to the present invention,
FIG. 2 is a plan view of the stopper device 10 of FIG.

The stopper device 10 is a single-acting pneumatic cylinder 11, a guide member 12 provided in parallel with a piston rod 13 of the pneumatic cylinder 11 and integrally with a cylinder tube 14, and
It comprises a buffer suspension device 19 mounted on a moving base 20, and the like.

In the present embodiment, the stopper device 10
Assume that the pallet PA is attached to a free-flow type conveyor frame or the like, and is used to stop and position the pallet PA conveyed in the direction of arrow B over a number of rollers (not shown).

The pneumatic cylinder 11 includes a piston 15 having an annular magnet 15a integrally connected to the piston rod 13 and bolts, and a compression spring 15b for urging the piston 15 upward in FIG. Cylinder covers 16a, 16b attached to the upper and lower ends of the cylinder tube 14 by snap rings are attached to the cylinder cover 16b, holes 16c and filters 16d provided in the cylinder cover 16b, and a cushioning action at both stroke ends of the piston 15. It consists of cushion pads 17a, 17b etc.
By supplying compressed air from a port not shown,
The piston 15 moves downward against the compression spring 15b.

The cylinder tube 14 has a buffer 23, which will be described later.
Is provided with a hole 14a for vertically moving. Also,
On the outer peripheral surface of the cylinder tube 14, the above magnet
Position sensors 18a and 18b which are operated by the magnetic force of 15a and detect the stroke end of the piston 15 (that is, the stop operation position and the passing operation position) are attached.

The guide member 12 includes a guide hole 12a provided in the cylinder tube 14, and a guide lock 12b that slides on an inner peripheral surface of a bearing member 12c fitted and attached to the upper end of the guide hole 12a. . The guide member 12 reinforces the piston rod 13 of the pneumatic cylinder 11 by receiving all or a part of the reaction force when the conveyed object comes into contact with the buffer stop device 19.

The moving base 20 includes a piston rod 13 and a guide rod 12.
b is attached to the upper end surface of each of the b by a bolt, whereby the piston rod 13 and the guide rod
It is connected so as to move integrally with 12b. And
The movable base 20 is vertically reciprocated by the piston rod 13, and is held by the guide rod 12b so as not to rotate around the axis of the piston rod 13 and with increased rigidity.

The buffer stop device 19 includes a bracket 20a attached to the upper end surface of the moving base 20, a stopper member 22 rotatably mounted on the bracket 20a via a shaft pin 21, and a buffer piston.
A shock absorber 23 attached to the movable base 20 so that 23a faces upward, a locking claw 24 rotatably attached to the bracket 20a via a shaft pin 25, a stop position attached to the movable base 20 It is composed of a regulating rod 26, a spring member 27 for urging the stopper member 22 and the locking claw 24 in a direction to open each other, and the like.

The cushioning device 23 is of a type in which the cushioning piston 23a automatically returns to the extended end in its free state. With the automatic restoration of the cushioning device 23, the contact surface 32 of the stopper member 22 is raised at the tip of the cushioning piston 23a. In the right direction in FIG. 1 (the state shown in FIG. 1), overcoming the biasing force of the spring member 27.

A roller 31 is attached to the upper end of the stopper member 22, and when the tip of the pallet PA conveyed from the right in FIG. Rotating to the left (buffering direction) in the figure, the contact surface 32 pushes down the buffer piston 23a, and the buffering action of the buffering device 23 is exhibited. Then, the contact surface 32 stops at a position where the contact surface 32 contacts the stop position regulating rod 26.

The locking claw 24 urged rightward in FIG. 1 by the spring member 27 normally has its distal end portion 24a in contact with the arcuate surface 33 provided on the stopper member 22. When the member 22 rotates to the left in the figure, the distal end portion 24a fits into the locking portion 34 provided at the end of the arc surface 33,
The movement of the locking portion 34 to the left, that is, the rotation of the stopper member 22 to the right is restricted.

Therefore, when the pallet PA comes into contact with the roller 31 and is stopped by the shock absorber 23 without impact,
The locking portion 34 engages with the locking claw 24 to restrict the rightward rotation of the stopper member 22, thereby preventing the shock absorbing device 23 from rebounding by the automatic return force. As a result, the stop position of the pallet PA is stabilized and the stop position accuracy is increased, and processing or assembling of the work placed on the pallet PA becomes easy.

In the state shown in the figure, the moving base 20, that is, the buffer stop device
19 is in a stop operation position for stopping the pallet PA, but in order to pass the pallet PA, the moving base 20 is lowered by the pneumatic cylinder 11 and lowered to a position where the roller 31 does not interfere with the pallet PA. Move to the passing operation position.

A release pin 41 is attached to the upper surface of the cylinder tube 14, and when the buffer stop device 19 moves down to reach the passing operation position, the lower surface of the locking claw 24 comes into contact with the release pin 41. 24 rotates to the left in FIG.
The engagement between the locking member 24a and the locking portion 34 of the stopper member 22 is released, and the stopper member 22 is rotated rightward by the automatic return force of the shock absorber 23, and returns to the original position and state.

After the pallet PA has passed, the pneumatic cylinder
The buffer stop device 19 is again raised to the stop operation position by 11 and waits for the next pallet PA to be transported.

In the above-described embodiment, various types or shapes of the shock absorber 23, such as a pneumatic type, a hydraulic type, a spring type, and a combination thereof, can be used. Further, in the above-described embodiment, the case where the shock absorbing device 23 itself is of the automatic return type has been described, but a shock absorbing device which is not of the automatic reset type, and a return spring member provided separately from this shock absorbing device. May be combined.

In the above-described embodiment, the biasing of the stopper member 22 in the left rotation direction and the biasing of the locking claw 24 in the right rotation direction are shared by one spring member 27. Various types of spring members, such as a pneumatic type and a gravity type, may be used. The material, structure, shape or dimensions of the pneumatic cylinder 11, the guide member 12, the moving base 20, the stopper member 22, the locking claw 24 or the release pin 41, and other members are selected or appropriately selected. Can be changed.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to this invention, the rebound after a conveyance thing, such as a pallet, stops can be eliminated and a stable stop position can be obtained.

Further, since the movable base is supported by the cylinder device and the guide member, the operation is stabilized without applying excessive force to the piston rod and the like of the cylinder device, and the cylinder device is less likely to fail and has a longer life.

[Brief description of the drawings]

FIG. 1 is a sectional front view of a stopper device according to the present invention, FIG.
The figure is a plan view of the stopper device of FIG. 10: Stopper device, 11: Pneumatic cylinder (cylinder device), 12: Guide member, 20: Moving base, 21: Shaft pin, 22: Stopper member, 23: Shock absorber (cushion member) , 24: locking claw, 34: locking part, 41: release pin (release member), PA: pallet (conveyed material).

Claims (1)

(57) [Claims] 1. A moving base, a cylinder device for moving the moving base between a stop operation position for stopping a conveyed object and a passing operation position for passing the conveyed object, and a cylinder device parallel to the cylinder device. And a guide member integrally provided to guide the movement of the moving base, and rotatably mounted on the moving base by a shaft pin, and when in the stop operation position, the conveyed object abuts and A stopper member that rotates in a buffering direction; and a buffer member that buffers rotation of the stopper member in the buffering direction and urges the stopper member in a direction opposite to the buffering direction. The stopper member is provided so as to be rotatable with respect to the moving base. A locking claw that regulates rotation of the lid member in a direction opposite to the buffering direction; A stopper device, comprising: a releasing member for releasing.