JPH035497Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention is a pallet conveyor that circulates a plurality of pallets on a conveyor frame and stops them at a predetermined work station. The present invention relates to a pallet guide device configured to allow pallets to move smoothly through the joints of the pallets.

Prior Art Recently, many pallet conveyors have been used for automatic assembly of various products, which circulate multiple pallets in a free cycle, stop them at a predetermined work station, and perform the predetermined work at that position. has been done. Among these, the most common method is to arrange an endless chain on a conveyor frame that forms the main transfer path, transmit the traction force of the endless chain to the pallet, and move the pallet along the conveyor frame. With this type of pallet conveyor,
A clutch mechanism with a complex structure is configured to turn on and off the traction force of the endless chain and transmit it to the pallet, but the cost of this device is high, and the frictional force between the endless chain and the pallet is A pallet conveyor has been developed that transmits the traction force of an endless chain to the pallet, eliminating the need for an expensive clutch mechanism. As shown in FIGS. 5 and 6, this pallet conveyor 1 has endless chains 3, 3a to which attachments 6 are attached as connecting plates, and the attachments 6 are movably guided by conveyor frames 2, 2a. friction plate 7 on the side of the pallet 10,
7a.

Problems to be Solved by the Invention In the above pallet conveyor 1, work stations are arranged at predetermined intervals, and each work station has a work unit (not shown).
However, as the number of assembled parts increases, a plurality of conveyor frames 2, 2a are connected to increase the number of work stations.
Therefore, the pallet 10 is moved from the conveyor frame 2 to the adjacent conveyor frame 2 as shown in FIG.
When transferring to a, the endless chains 3, 3a that transmit traction force to the pallet 10 circulate within the conveyor frames 2, 2a, respectively.
When the pallet 10 passes through this connection, a part of the friction plate 7 attached to the pallet 10 is attached to an attachment 6 fixed to the endless chain 3.
The tip of the friction plate 7 opens slightly. Therefore, the friction plate 7 is connected to the endless chain 3.
When the attachment 6 starts contacting the endless chain 3a, the attachment 6 hits the friction plate 7, and the surface of the friction plate 7 is damaged. If the attachment 6 engages with this damage mark, the pallet 10 and the friction plates 7, 7
a was pushed up, and pallet 10 was removed at this connection.
There are disadvantages such as stopping.

Means for Solving the Problems The present invention aims to eliminate the above-mentioned drawbacks.
An endless chain is disposed on the conveyor frame so as to circulate and move, and the conveyor frame is formed so that pallets can be moved. Further, an attachment is connected to the endless chain as a connecting plate, and the traction force of the endless chain is transmitted to the pallet by frictional force with a friction plate attached to the pallet, and the pallet is moved in a predetermined direction. It consists of

Further, pallet guides are fixed to both ends of the conveyor frame so as to be located on an extension line of the chain guide. This pallet guide protrudes from the chain guide by the thickness of the attachment, and is configured such that the tip of the friction plate separated from the attachment moves along it.

Function In this pallet conveyor, when the pallet reaches the connection part of the conveyor frame, the friction plate separates from the attachment because the attachment begins to descend at this position, but immediately comes into contact with the pallet guide. Therefore, the friction plate can move along the pallet guide and can move to the adjacent conveyor frame without opening the front end of the friction plate. Also, when transferring to an adjacent conveyor frame, the tip of the friction plate is guided by the pallet guide of the adjacent conveyor frame, so the pallet fits smoothly into the attachment without being pushed up by the attachment, and the pallet is transferred to the conveyor frame. does not stop at the joint,
Can be moved smoothly.

Embodiments Hereinafter, embodiments will be described with reference to the drawings. In FIGS. 1 to 4, reference numeral 1 denotes a pallet conveyor, which has a conveyor frame 2 arranged horizontally. In this conveyor frame 2, an endless chain 3 that moves in a certain direction is arranged so as to be guided by a chain receiver 5 and move straight, and this endless chain 3 has a substantially rectangular plate-shaped attachment that also serves as a connecting plate. 6 is attached so that it does not come into contact with the adjacent one. Further, a chain guide 4 is arranged on the conveyor frame 2 in the direction in which the endless chain 3 extends, and the chain guide 4 is made of a wear-resistant material having a low coefficient of friction with respect to the attachment 6, and is slidable against the attachment 6. It is configured to guide the user freely.

A plurality of pallets 10 are movably mounted on the conveyor frame 2, and four rollers 9 are rotatably fixed to the lower part of the pallet 10 along the guide plate 12 of the conveyor frame 2. . At the forward end and the backward end of this pallet 10, points symmetrical with respect to the center of the pallet 10 are provided.
That is, cam followers 11, 11a are arranged at opposite positions a predetermined distance from the center, and stoppers (not shown) abut against the cam followers 11, 11a to position the pallet 10.

Furthermore, two friction plates 7, 7a are arranged on the sides of the pallet 10, and the friction plates 7, 7a are made of a wear-resistant material having a high coefficient of friction with respect to the attachment 6. The friction plate 7a is fixed to the pallet 10, and the other friction plate 7 is always urged by a spring 13 so as to be freely retractable. Further, the pallet 10 is positioned such that the friction plates 7, 7a are in contact with the attachment 6,
The pallet 10 is configured to receive the traction force of the endless chain 3 due to the frictional force between the friction plates 7, 7a and the attachment 6.

On the other hand, sprockets 14 are rotatably arranged near both ends of the conveyor frame 2, and the endless chain 3 meshes with the sprockets 14 to move the endless chain 3 that moves on the conveyor frame 2 into the conveyor frame 2. It is configured to be guided and circulated. Further, a conveyor frame 2a is connected adjacent to the conveyor frame 2, and an endless chain 3a is similarly arranged on this conveyor frame 2a.

A chain guide 4 is attached to the conveyor frame 2.
A pallet guide 15 constituting a pallet guiding device is fixed on the extension line of the chain guide 4, and the pallet guide 15 is configured to protrude from the chain guide 4 by the thickness of the attachment 6. This pallet guide 15 extends from the position where the attachment 6 begins to descend to the edge of the conveyor frame 2, and is configured to guide the friction plates 7, 7a by its guide surface. Further, a pallet guide 15a is similarly attached to the adjacent conveyor frame 2a, and is connected to the pallet guide 15 so as to form the same plane.

In the pallet conveyor 1 described above, when the pallet 10 moves through the joint between the conveyor frames 2, 2a, the endless chain 3 begins to descend along the sprocket 14, and the attachment 6 separates from the friction plates 7, 7a. Thereafter, since the friction plates 7, 7a immediately come into contact with the pallet guide 15, the tips of the friction plates 7, 7a move to the adjacent conveyor frame 2a without opening. When the tips of the friction plates 7, 7a reach the adjacent conveyor frame 2a, they are simultaneously guided by the pallet guide 15a, and the friction plates 7, 7a can be smoothly fitted into the endless chain 3a while maintaining a predetermined width.

Effects of the invention As explained above, in this invention, a pallet guide is attached to the joint of the conveyor frame, and the tip of the friction plate does not open when passing through the pallet. , the endless chain does not push up the friction plate and can be fitted smoothly, and not only does it not damage the friction plate, but also prevents the pallet from stopping at the connection point. There are advantages such as being able to provide a highly reliable conveyor.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the main part of the present invention, Fig. 2 is a cross-sectional view of the main part taken along line A-A in Fig. 1, and Fig. 3 is a cross-sectional view of the main part along line B-B in Fig. 1. Figure 4 is a sectional view of the main part taken along line C-C in Fig. 3, Fig. 5 is a sectional view of the main part of the conventional example, Fig. 6 is a partial view of the endless chain in Fig. 5, and Fig. 7 is a sectional view of the main part of the conventional example. The figure is an explanatory cross-sectional view of a main part showing a connection part of a conventional conveyor frame. 1... Pallet conveyor, 2, 2a... Conveyor frame, 3, 3a... Endless chain, 4...
Chain guide, 5... Chain receiver, 6... Attachment, 7, 7a... Friction plate, 8...
..., 9...roller, 10...palette, 11,1
1a...Cam follower, 12...Guide plate, 13...Spring, 14...Sprocket, 1
5, 15a...Palette guide.

Claims (1)

[Scope of claim for utility model registration] An endless chain 3 on the conveyor frame 2, 2a,
3a is arranged to circulate, an attachment 6 is attached as a connecting plate to the endless chains 3, 3a, and a chain guide 4 for guiding this attachment 6 is attached to the conveyor frames 2, 2a. A pallet 10 is formed to be movable, friction plates 7, 7a are attached to the pallet 10, and the traction force of the endless chains 3, 3a is transmitted to the pallet 10 by the frictional force between the friction plates 7, 7a and the attachment 6. In a pallet conveyor configured to move a pallet 10 in a predetermined direction, pallet guides 15, 15a are fixed to the ends of the conveyor frames 2, 2a so as to be located on an extension line of the chain guide 4. , 15a are configured to protrude from the chain guide 4 by the weight of the attachment 6, and the friction plates 7, 7a are configured to move along these.