JPS6234898Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pallet stopping device that is used on a pallet conveyor for loading and transferring pallets, and is capable of reliably stopping the pallets at a working position during the transfer without applying any impact. be.

Generally, a traveling rail support plate is provided on the opposing inner sides of a pair of pallet guides, and a chain having pallet placement rollers is run on this traveling rail support plate to transfer the pallet placed on the rollers of the chain. In such a device, a stopper is provided to stop the pallet in the working position. Conventional stoppers stop the pallet by colliding with each other, which causes the pallet to temporarily move backward due to the impact and has an adverse effect on the products on the pallet.

The present invention was made to improve the above-mentioned drawbacks of the conventional method.
A brake is provided that is inclined to gradually become higher in the direction of pallet movement, and its tip is slightly higher than the chain so that it is constantly biased upward, and a stopper is provided slightly on the side of the movement direction of the brake. This is what happens. Therefore, the transported pallet comes into contact with the brake and is pushed down, so that the pallet receives pressure from the brake and gradually slows down, and then stops at the stopper, where it is subjected to shocks and vibrations. It will stop without fail.

An embodiment of the present invention will be described below based on the drawings.

In the figure, reference numeral 1 denotes a pallet stopping device, and this stopping device 1 is located approximately in the middle of a pair of pallet transfer devices 3 on which pallets 2 are placed and transferred. 4 is a pallet guide.

The pallet stopping device 1 has a pair of stoppers 5 made of rubber rollers on the upper part of which are rotatably supported by a support plate 6 for locking the pallet 2. As shown in FIG. A disk-shaped locking plate 7 and a cylindrical advancing/retracting rod 8 having a smaller diameter than the locking plate 7 are successively connected and fixed to the lower end of the support plate 6. A disk-shaped locking piece 9 is provided on the advance/retreat rod 8 close to its lower end. A push-up board 10 is provided below the locking board 7 so as to be slidable on the advance/retreat rod 8, and a brake 11 is provided at the upper end of the push-up board 10 so as to be located in front of the stopper 5. ing. This brake 11 is made of a material such as a leaf spring, and has an ∠-shaped (inverted F-shaped) shape that is folded in half so that the tip becomes gradually higher in the direction of movement of the pallet 2. Usually, the tip 12 is bent in half. It protrudes slightly from the chain 13, which will be described later. The advancing/retracting rod 8 is provided so as to be movable back and forth within a bearing 15 fixed to the machine frame 14. A coil spring 16 is placed between the recessed portion of the upper part of this bearing 15 and the push-up plate 10.
is provided, and this coil spring 16 raises the brake 11 via the push-up plate 10 and raises the stopper 5 via the locking plate 7. At this time, the locking piece 9 locks on the bearing 15, and the brake 11 and stopper 5 are stopped at a predetermined position.

A lever 17 is partially supported by a pin 18 at the lower end of the advancement/retraction rod 8, the tip of the lever 17 is rotatably supported by the pallet guide 4 by a pin 19, and the other end is engaged. It is inserted into an engagement hole 21 drilled in plywood 20. A stepped portion 22 is formed in the engagement hole 21, and the advancing/retracting rod 8 can be controlled in two positions, up and down, by attaching and detaching the lever 17 to the stepped portion 22. That is, when the lever 17 is lowered and engaged with the stepped portion 22, the advance/retreat rod 8 is lowered, and the locking plate 7 pushes the push-up plate 10 against the coil spring 16, causing the brake 11 and the stopper 5 to lower. .

The pallet transfer device 3 consists of a pair of left and right chains 13 and a running rail support plate 23.
The chain 13 has a forward side 24 and a backward side 25 connected in an endless ring shape, and is rotated by a motor (not shown) via sprockets that mesh at both ends. A running wheel 26 made of a conductive rubber roller is rotatably supported on the inside of the chain 13, and a pallet loading roller 27 made of a slightly larger diameter conductive rubber roller of this running wheel 26 is rotatably supported on the outside. It is pivoted. The running wheels 26 are connected to the rails 2 on the running support plate 23.
Run on 8. At this time, the pallet mounting roller 27 is positioned in the air without contacting the traveling rail support plate 23, and the pallet 2 is mounted on the upper part. The running rail support plate 23 is fixed to a pallet guide 4 serving as the main body of the conveyor.

Next, the effect will be explained.

First, the lever 17 is disengaged from the stepped portion 22.
Then, the push-up board 10 is pushed up by the pressure of the coil spring 16, and the locking board 7 is also pushed up by the push-up board 1.
0 and the brake 11 and stopper 5 rise slightly above the chain 13, and then the locking piece 9 locks on the bearing 15 and stops. When the pallet 2 is sent in this state, the pallet 2 first comes into contact with the tip 12 of the brake 11 and advances while pushing down the brake 11 against the pressure of the coil spring 16, so that the speed gradually and reliably increases. is dropped and then comes into contact with the stopper 5 and stops without receiving any shock or vibration. After stopping, the placing roller 27 is rotatable independently of the rotation of the chain 13, so only the chain 13 moves while the placing roller 27 idles.

When the assembly work on the pallet 2 is completed at the stop position, when the lever 17 is pushed down and engaged with the stepped part 22, the stopper 5 and the brake 11 are lowered against the coil spring 16, and the pallet 2 is transferred again by the chain 13. be done.

As described above, in this invention, when temporarily stopping a pallet moving on a pallet conveyor, the brake is used to gradually reduce the speed of the pallet, and then
It was made to stop by being latched to the stopper.
In other words, when the pallet comes into contact with the brake, since the brake is in an inverted F-shape, the braking force starts from zero and gradually increases.Moreover, a force is applied in the direction of folding the brake in two, and this force is applied to the coil spring. transmitted to. Therefore, even if the direction of movement of the pallet and the direction of compression of the coil spring are substantially perpendicular, the compression is smoothly transmitted to the coil spring via the inverted F-shaped brake. Therefore, the pallet can be reliably stopped without being subjected to any impact or vibration. Moreover, the brake is simply bent by bending the leaf spring etc. into an inverted F-shape.
In addition, the stopper simply requires a rubber roller to be attached to the upper end of the advance/retreat shaft, and no processing is applied to the pallet, so any type of pallet can be used, and the structure is simple and can be provided at low cost.

[Brief explanation of drawings]

Figure 1 is a sectional view from the front showing an embodiment of the pallet conveyor stopping device according to the present invention;
The figure is a sectional view of the same as seen from the side. 1... Pallet stopping device, 2... Pallet, 3
...Pallet transfer device, 4...Pallet guide, 5...Stopper, 11...Brake.

Claims (1)

[Scope of utility model registration request] A transport device is constructed by providing a chain with running wheels and a pallet loading roller that rotates idly, and the pallet is moved along a pallet guide while being placed on the pallet loading roller, and is stopped by a stop device in the middle of the transport path. In a pallet conveyor that temporarily stops pallets, the stopping device includes a bearing provided in the machine frame, a rod provided on the bearing so as to be movable back and forth in a direction substantially perpendicular to the moving direction of the chain, A stopper made of a rubber roller is rotatably provided at the upper end so as to protrude slightly from the transfer device, and a push-up plate is fitted to this advance/retreat rod so as to be slidable in the axial direction, and the push-up plate is connected to the coil. The lower end of the brake, which is an inverted F-shaped leaf spring located in front of the stopper, is fixed to this push-up plate, and the upper end of this brake is slightly protruded from the transfer device. A stop device for a pallet conveyor, characterized in that the stop release lever is connected to the lower end of the advancing/retracting rod.