JPS6133661B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a pallet for transport that facilitates pallet production and enables smooth circular transport.

Generally, linear drive type transfer devices are often used in automatic assembly machines, automatic processing machines, and the like.

That is, in this type of transfer device, a working mechanism or a workpiece holding mechanism is attached to a pallet for transfer, the pallet is fixed to a chain, a steel belt, etc., and the chain or steel belt is driven by a drive mechanism. , pallets are generally transported either horizontally or vertically. In such a transfer device, for example, as shown in Fig. 1, the pallet a, which is vertically arranged and circulated, does not pose a problem if it is moved along a straight section of the guide rail, but when it is moved along a semicircular curved section. When passing through the pallets, the pallets may squeak with other adjacent pallets, impeding smooth movement. Therefore, in the past, when manufacturing individual pallets, a curved surface b was formed on one side of the pallet a made of a plate-shaped body to allow the pallet a to move smoothly, but this curved surface b
An extremely high degree of precision is required in the design and processing of
This has the disadvantage that it is difficult to manufacture and is extremely expensive.

The present invention has been made in order to eliminate the above-mentioned drawbacks, and aims to provide a transport pallet that is easy to manufacture and enables smooth circular transport. A plate-shaped pallet body that can be used as a pallet, and a support shaft that is attached to the corner of this body and that is parallel to the plate surface and perpendicular to the pallet transport direction, and protrudes to the side of the main shaft. The pallet is configured to include a guide roller, and the pallets can be circulated and transferred while being brought into contact with each other via the guide roller.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to embodiments and the drawings. FIG. 3 shows the pallet according to the present invention applied to a vertically moving linear drive type transfer device. In the figure, reference numeral 1 denotes a guide rail of the transfer device, which is composed of parallel straight sections 2, 2 and a semicircular turning section 3 connecting these sections at their ends. Reference numeral 4 denotes a transport pallet, which is made up of a plurality of pallets arranged adjacent to the guide rail 1 and transported by a drive mechanism 9, which will be described later. And this palette 4 is the second
As shown in the figure, a rectangular plate-shaped pallet body 4
a, protrusions 4b provided at the four corners of the main body 4a, and a support shaft 4c that is inserted through the protrusions 4b and is arranged parallel to the plate surface and at right angles to the pallet transport direction. A guide roller 5 is attached to the main body 4a and projects laterally. 6 is a mounting hole.

Since the transfer pallet 4 has the above-described structure, in order to transfer the pallet, the drive mechanism 9 may be operated after, for example, a workpiece is attached to the attachment hole of the pallet body using an attachment screw. The pallets are therefore circulated along the guide rail 1 via the rollers 5,5. That is, the pallet 4 moves along the straight portion 2 of the guide rail 1 while the rollers 5 protruding from the sides of the four corners of the pallet main body 4a are in mutual contact with the rollers 5 of other adjacent pallets 4. Even when reaching the semicircular turning section 3, the rollers 5 can maintain contact with each other and can be moved to follow the semicircular turning section 3 of the guide rail 1. Needless to say, even in the semicircular turning section 3, which is a curved section, extremely smooth circulation transfer can be performed.

As described in detail above, the present invention consists of a plate-shaped pallet main body, in which a pallet is disposed on a guide rail so as to be vertically transferable, and a pallet which is attached to the four corners of the main body and parallel to the plate surface of the main body. It consists of a guide roller that protrudes to the side of the main body via a support shaft arranged perpendicular to the transport direction, and the workpiece is mounted on the surface of the pallet main body, and is attached to the mounting hole via a screw. However, since this is a transporting pallet in which the pallets are brought into contact with each other and circulated through the rollers, the structure is extremely simple, and unlike conventional pallets, it is possible to move the pallets in a circular manner, especially in curved parts such as semicircular turning parts. In order to make the pallet move smoothly, there is no need to perform precision machining on the pallet body, which improves workability, and it also has the advantage of being inexpensive because easily available rotary rollers and the like can be used. In addition, the guide roller is attached to a corner of the pallet body, and is attached to a support shaft that is parallel to the plate surface of the pallet body and perpendicular to the conveying direction, so it can be used in a semicircular manner. In curved sections such as turning sections, the guide roller always moves to follow the curved section of the guide rail, so pallets can be transferred smoothly not only on straight sections of the guide rail but also on curved sections. It becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional example of a pallet for vertical transfer, and FIGS. 2 and 3 show an embodiment of the present invention. FIG. 2 is a perspective view of a pallet for vertical transfer, and FIG. 2 is a front view of a vertically moving transfer device in which the pallets of FIG. 2 are arranged; FIG. 1...Guide rail, 4...Pallet, 4a...
...Pallet body, 4c... Support shaft, 5... Guide roller.

Claims (1)

[Claims] 1 A plurality of pallets for transportation are vertically transferred adjacent to each other on a guide rail having a straight part and a curved part connected to the straight part, and each pallet consists of a rectangular plate-shaped pallet body and a In the pallet for transfer, the guide roller is attached to a corner of the main body via a support shaft and protrudes to the side of the main body. The pallets are arranged perpendicular to the transfer direction, and the guide rollers are guided by the guide rails, so that the pallets come into contact with each other and are sequentially circulated through the guide rollers. A pallet for transportation that is characterized by: