JPS62159851A - Foldable type multinode link - Google Patents

Abstract

PURPOSE:To prevent the abrasion of a pin connection part by using a shape memory alloy for the joint part at the edge part of a member and extending and contracting a multinode link. CONSTITUTION:A shape memory alloy 6 is deformed by the heating by a heater 8, and a member 1 is extended. While, said shape memory alloy 6 is installed onto the member 1 through an insulating material, and the curvature is reduced by the direct electric conduction, and the member 1 is extended. The mechanical parts in this structure is only the fixed edge 5' of a link and the installation part for a top edge member 4. Since the joint part has not a pin, the joint part is not abrasion-worn by the extension and contraction movement of the link.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a folding type multi-joint link, and particularly to a multi-joint link that does not have a moving part such as a bottle at a joint portion and is suitable for folding.

[Conventional technology]

An example of a conventional folding multi-section link is shown in FIG. In FIG. 1, 1 is a member, 2 is a bottle joint at the end joint, 3 and 3' are displacement shinai mouth members, 4 is a tip member, and 5 is a bottle joint at the center joint.

In this multi-joint link, the displacement of the connecting portion 5' is restrained and the member 3' is displaced in the X direction.

In the figure, the member 1 is deformed as shown by the dotted line.

[Problem that the invention seeks to solve]

In the conventional plastic surgery mentioned above, when a multi-joint link is used as a transport mechanism in a vacuum container, the coefficient of friction increases significantly in the vacuum container, causing frictional wear on the joints 2, 5° 5', and the vacuum There was a problem of lowering the cleanliness inside the container.

SUMMARY OF THE INVENTION An object of the present invention is to provide a foldable multi-articulated link which does not cause wear and tear on the joint portion of the joint due to expansion and contraction movement and is suitable for transporting parts in a vacuum container or the like.

[Failure to solve the problem]

The above object is to use alloys, bimetals, etc. in the joints at the ends of the members so that the expansion and contraction of the multi-joint links is mechanically non-mechanical.

[Effect]

This problem can be solved by heating the shape memory alloy or bimetal indirectly or by direct heating to reduce its curvature, and by stretching and cooling the link to return it to its original temperature, it can be made into a structure that shrinks.

〔Example〕

Hereinafter, one embodiment of the present invention will be specifically described using FIG. 2. In FIG. 2, 1 is a member, 6 is a shape memory metal, 5' is a fixed end of the link, and 4 is a tip member. 3 and 4 show details of section A in FIG. 2. 6 in Figure 3
is a shape memory public money which is the subject of the present invention, 8 is a heating d-
When heated by 8, the member 1 is deformed and elongated as shown at 6' in FIG. 4.

On the other hand, in FIG. 5, the curvature is reduced and the member 1 is elongated by attaching the metal 6 to the member 1 via the insulator 7 and directly energizing it. The mechanical parts in this structure are only the mounting part 5' and part number 4.

Therefore, since there is no bottle in the joint part, the joint part will not be worn out due to the expansion and contraction movement of the link, improving the reliability of the link, and reducing the cleanliness when used in a clean environment. Never.

〔Effect of the invention〕

According to the present invention, since the folding multi-section link is mechanical-less, it does not generate dust due to frictional wear and is suitable for use in a clean environment.

[Brief explanation of drawings]

FIG. 1 is an external view of the foldable multi-section link according to the present invention;
2 and 3 are detailed views of the joint portion, FIG. 9 is a detailed view of another embodiment of the joint portion, and FIG. 3 is an external view of a folding articulated link having a conventional structure. DESCRIPTION OF SYMBOLS 1... Member, 2... Bin tie part of member end joint, 6
... Shape memory connection or bimetal joint, 5... Pin joint of member middle joint.

Claims (1)

[Claims] 1. A foldable multi-joint link in which the joint parts are connected by members to perform constant motion, and the folding multi-joint link is characterized in that the joint parts are made of shape memory alloy or bimetal to form the multi-joints.