JPH0614142U - Stopper device - Google Patents

Abstract

(57) [Abstract] [Purpose] Regarding a stopper device for stopping a conveyed object such as a pallet conveyed on a conveyor or the like at an appropriate position, it is possible to easily convey the conveyed object without moving the entire stopper device. The purpose is to adjust the stop position with high accuracy. [Structure] A movable base 20, a cylinder device for moving the movable base, a stopper member 22 that rotates in the conveying direction when a conveyed object comes into contact therewith, and a buffer device 23 that buffers the rotation of the stopper member. The member is provided with a locking portion 35 protruding in the radial direction, and a lock lever 24 for contacting and engaging with the locking portion and restricting and positioning the stopper member in the direction opposite to the conveying direction is provided. The lock lever is provided with an adjusting screw 43 that is in contact with the locking portion and adjusts the buffering operation position of the stopper member.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stopper device for stopping an object such as a pallet conveyed on a conveyor or the like at an appropriate position.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, a free-flow conveyor is often used to convey pallets, and a stopper device that moves up and down at a stop position is used to stop the pallets that have been conveyed on the free-flow conveyor.

A conventional stopper device is a moving base, a cylinder device for vertically moving the moving base, and a stopper member that is rotatably attached to the moving base by a shaft pin and that is rotated in a transport direction when a pallet comes into contact therewith. It also has a buffer member that buffers the rotation of the stopper member in the carrying direction and biases the stopper member in the direction opposite to the carrying direction. Further, the stopper member is provided with a step portion, and a locking claw that engages with the step portion at a position where the stopper member is rotated in the transport direction and restricts rotation of the stopper member in a direction opposite to the transport direction. It is provided (Japanese Patent Laid-Open No. 2-100918).

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned conventional stopper device, the engagement position between the step portion and the locking claw is fixed, and the position cannot be variably adjusted. Cannot be adjusted because the position where the stopper contacts the stopper member is fixed.

Moreover, since the engaging position differs due to the processing error of the step portion and the locking claw, the stopping position of the pallet differs depending on the product of the stopper device. Therefore, the stop position of the pallet on the conveyor cannot be finely adjusted, and the pallet positioning accuracy cannot be improved.

Further, when the stop position of the pallet is greatly deviated, the bolt hole for mounting the entire stopper device is elongated and the entire stopper device is moved and adjusted to adjust the stop position of the pallet. I had to. However, the work was extremely troublesome, and it was not possible to accurately adjust the stop position of the pallet.

In view of the above problems, it is an object of the present invention to provide a stopper device that can easily adjust the stop position of a conveyed object with high accuracy without moving the entire stopper device. .

[0008]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, an apparatus according to the invention of claim 1 comprises a movable base, a stop operation position for stopping the conveyed object, and a passing operation position for passing the conveyed object. And a stopper member that is rotatably attached to the moving base by a shaft pin, and that is in contact with the object to be conveyed and is thereby rotated in the conveying direction when the object is in a stop operation position. A buffer member that buffers the rotation of the stopper member in the transport direction and biases the stopper member in a direction opposite to the transport direction. Is provided with a locking portion protruding in the radial direction, which is rotatably attached by a rotation pin parallel to the shaft pin, and the locking member is held at the buffering operation position where the stopper member is rotated in the transport direction. A lock lever that abuts and engages with the stopper member to regulate the rotation of the stopper member in the direction opposite to the conveying direction to position the stopper member at the cushioning operation position; and the lock lever with the locking portion. And a release member that is fixedly provided to the cylinder device and that is fixed to the cylinder device and that pushes up the lock lever at the passage operation position to release the engagement with the stopper member. In addition, the lock lever is provided with an adjusting screw that comes into contact with the locking portion and adjusts the buffering operation position of the stopper member.

[0009]

[Action]

 When the moving base is in the stop operation position, the conveyed goods come into contact with the stopper member. When the conveyed object comes into contact with the stopper member, the stopper member rotates in the conveying direction, and at this time, the cushioning member exerts a cushioning action, and the conveyed article stops with a small impact.

When the stopper member rotates in the transport direction, the locking portion engages with the lock lever at the rotated position, which prevents the stopper member from returning to the direction opposite to the transport direction, and buffers it. Positioned in the operating position. The cushioning operation position is finely adjusted by the adjusting screw.

When the movable base moves to the passing operation position, the stopped conveyed object is conveyed again, and the lock lever is disengaged from the locking portion by the release member, so that the stopper member and the cushioning member. Returns to its original position.

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

[0013]

【Example】

 1 is a 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. 1, FIG. 3 is a right side view of a main part of the stopper device 10 of FIG. 1, and FIG. It is a figure which expands the principal part of the stopper device 10 of FIG.

The stopper device 10 is provided in parallel with the pneumatic cylinder 11, the piston rod 13 of the pneumatic cylinder 11, and a guide rod 12 integrally provided with the head member 14 and protruding upward from the head member 14. It is composed of a release bar 17, a buffer stop device 19 provided at the tip of the piston rod 13, and the like.

In the present embodiment, the stopper device 10 is attached to a frame of a free-flow type conveyor, etc., and is conveyed in the direction of arrow M1 (conveyance direction) on a large number of rollers (not shown). It shall be used to stop and position the incoming pallet PA.

In the pneumatic cylinder 11, by supplying compressed air from the ports 18a and 18b, the piston rod 13 reciprocates in the vertical direction together with the internal piston. The guide member 12 is for preventing the rotation of the piston rod 13 by engaging with the guide groove 20c of the movable base 20.

The buffer stop device 19 is attached to the peripheral surface of the tip end portion of the piston rod 13, and moves integrally with the movable base 20, and a shaft pin 21 provided over two support wall portions 20 a of the movable base 20. A stopper member 22 rotatably attached by a shaft pin 21, a shock absorber 23 embedded in the center of the tip end portion of the piston rod 13, and a pivot pin 25 rotatably provided with respect to the support wall portion 20a. The lock lever 24 and the like are provided.

The buffer stop device 19 is positioned at a stop operation position PS1 (position shown in FIG. 1) that stops the pallet PA and a passage operation position PS2 that allows the pallet PA to pass, according to the vertical movement of the piston rod 13. To be done.

A roller 31 is rotatably attached to an upper end portion of the stopper member 22, and is urged by a spring member 27 so as to rotate in the left direction in FIG. The stopper member 22 rotates in the transport direction when the pallet PA abuts on the roller 31 when the buffer stop device 19 is in the stop operation position PS1.

Further, the stopper member 22 is formed with a locking portion 35 that gently protrudes in the radial direction so that a front end portion of an adjusting screw 43 of a lock lever 24, which will be described later, comes into contact with the stopper member 22.

The shock absorber 23 is of a type in which the rod 23a automatically returns to the extension end in its free state. When the stopper member 22 rotates in the transport direction, the lower end portion 22a of the stopper member 22 contacts the tip of the rod 23a, whereby the rotation of the stopper member 22 is buffered and the shock is absorbed.

When the shock absorber 23 automatically returns, the lower end 22a of the stopper member 22 is pushed upward by the rod 23a to overcome the urging force of the spring member 27 and rotate rightward in FIG. Becomes

The lock lever 24 includes a main body 41, an adjusting screw 43 threaded into a screw hole 42 provided in the main body 41, and a nut 44 for fixing the adjusting screw 43.

The main body 41 is in the shape of a substantially quadrangular prism that is long in the lateral direction, and has a portion provided with a screw hole 42 bulging upward at a position close to one end in the longitudinal direction. There is. One end of the above-described spring member 27 is pressed against the substantially central portion of the main body 41 in the longitudinal direction, whereby the main body 41 is urged to rotate leftward in FIG.

Then, normally, the lower surface of the other end portion in the longitudinal direction of the main body 41 is stable in a state of being in contact with the protruding portion 20b protruding inward from the support wall portion 20a (shown in FIG. 4). Status). The position of the lock lever 24 in this state is the engagement position.

The adjusting screw 43 is a known one in which a steel ball is embedded in the tip of the screw, and is adjusted by rotating it with a wrench using a hexagonal hole formed in the end. By adjusting the adjusting screw 43, the contact position between the adjusting screw 43 and the locking portion 35 is changed at the engaging position, whereby the stable rotation angle position of the stopper member 22 is adjusted.

The position where the stopper member 22 is engaged with the lock lever 24 and becomes stable after the stopper member 22 rotates in the transport direction is the buffering position (the position indicated by A1 in FIG. 1). At the engagement position, the locking portion 35 tries to rotate rightward in FIG. 4 about the shaft pin 21 due to the restoring force of the shock absorber 23, but the tip of the adjusting screw 43 is locked at the locking portion 35. Since it abuts a little below the apex of, the adjusting screw 43 is not rotated to the right by it.

When the piston rod 13 descends and the buffer stop device 19 reaches the passage operation position PS2 while the lock lever 24 is engaged with the locking portion 35, the release bar 17 is formed on the lower surface of the main body 41 substantially at the center. The tip of the lock lever 24 abuts, whereby the lock lever 24 is rotated rightward against the biasing force of the spring member 27, and the engagement between the lock lever 24 and the locking portion 35 is released.

Next, the operation of the stopper device 10 configured as described above will be described. First, in a normal state where the pallet PA is not in contact with the roller 31, the stopper member 22 is at the position indicated by A2 in FIG. At this time, the tip of the adjusting screw 43 is in contact with the arcuate surface above the locking portion 35.

In this state, when the tip of the pallet PA conveyed from the right side of FIG. 1 comes into contact with the roller 31, the stopper member 22 is rotated by the momentum to the left side (conveying direction) of FIG. As a result, the lower end portion 22a pushes down the rod 23a, and the cushioning function of the cushioning device 23 is exerted.

At the same time, the locking portion 35 rides over the tip end portion of the adjusting screw 43 and abuts and engages at the engaging position. This stops the stopper member 22 from rotating to the right.

Therefore, when the pallet PA comes into contact with the roller 31 and is buffered by the buffer device 23 and stopped without impact, the locking portion 35 and the tip end of the adjusting screw 43 are engaged with each other and the right end of the stopper member 22. Rotation in the direction is restricted, rebound due to the automatic return force of the shock absorber 23 is prevented, and the stop position of the pallet PA is stabilized.

Further, since the stop position of the pallet PA can be finely adjusted by adjusting the adjusting screw 43, it is possible to absorb the processing error and the mounting error of each part and improve the accuracy of the stop position of the pallet PA. Thus, the work placed on the pallet PA can be processed or assembled without repositioning.

Next, in order to pass the pallet PA, the moving base 20 is lowered by the pneumatic cylinder 11 and is moved to the passing operation position PS2 in which the roller 31 is lowered to a position where it does not interfere with the pallet PA.

Then, the lock lever 24 is rotated by the release bar 17, and the engagement between the lock lever 24 and the locking portion 35 is released. As a result, the stopper member 22 is rotated to the right by the restoring force of the shock absorber 23 to return to the original position and state.

After the pallet PA has passed, the buffer stop device 19 is raised again to the stop operation position PS1 by the pneumatic cylinder 11, and the next pallet PA is waited to be conveyed.

Note that the stopper member 22 is rotatable to the position A3 in FIG. 1 in case the buffer stop device 19 is raised while the pallet PA is passing. In the above-described embodiment, the shock absorber 23 may be of various types or shapes such as a pneumatic type, a hydraulic type, a spring type, and a combination type thereof. In addition, in the above-described embodiment, one spring member 27 is used for both the urging of the stopper member 22 in the leftward rotation direction and the urging of the lock lever 24 in the leftward rotation direction. The spring member may be a spring member, and as such a spring member, various types such as a pneumatic type and a gravity type can be used. Pneumatic cylinder 11, guide member 12, movable base 20, stopper member 22, lock lever 24, body 41, adjusting screw 43, release bar 17, other materials, structures, shapes or dimensions of other members are Various modifications can be made according to the purpose of the invention.

[0038]

[Effect of device]

 According to the present invention, the stop position of a conveyed object can be easily adjusted with high accuracy without moving the entire stopper device. Therefore, it is possible to stop the conveyed object with high accuracy by absorbing the processing error and mounting error of each part, and to process or assemble the conveyed object or the work placed on it without repositioning. And are possible.

[Brief description of drawings]

FIG. 1 is a front view of a stopper device according to the present invention.

2 is a plan view of the stopper device of FIG. 1. FIG.

FIG. 3 is a right side view of a main part of the stopper device of FIG.

FIG. 4 is an enlarged and partial cross-sectional view of a main part of the stopper device of FIG.

[Explanation of symbols]

 10 Stopper Device 11 Pneumatic Cylinder (Cylinder Device) 17 Release Bar (Release Member) 20 Moving Base 21 Axis Pin 22 Stopper Member 23 Shock Absorber (Cushioning Member) 24 Lock Lever 25 Rotating Pin 27 Spring Member 35 Locking Part 43 Adjustment Screw PA pallet (conveyed goods)

Claims (1)

[Scope of utility model registration request] 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 an axis for the moving base. A stopper member that is rotatably attached by a pin and that is in contact with the transported object when it is in the stop operation position and that rotates in the transport direction by this, and a buffer member that cushions the rotation of the stopper member in the transport direction. A stopper member for urging the stopper member in a direction opposite to the conveying direction, and the stopper member is provided with a locking portion protruding in a radial direction with the shaft pin as a center. The stopper member is rotatably mounted by a rotating pin parallel to the pin, and the stopper member abuts and engages with the locking portion at a buffering operation position where the stopper member is rotated in the conveying direction. A lock lever that restricts rotation in the opposite direction to position the stopper member at a buffering operation position, a spring member that urges the lock lever to an engagement position with the locking portion, and the cylinder device. And a release member that is fixedly provided with respect to the lock lever and pushes up the lock lever at the passing position to release the engagement with the stopper member. A stopper device comprising an adjusting screw for adjusting the buffering position of the stopper member.