JPH0547507U - Rodless cylinder device - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a rodless cylinder having a simple structure. [Structure] A flexible and expandable cylinder body 2 is provided between fixed side plates 1, the interior of the cylinder body 2 is divided into two chambers 3 and 4, and a fluid is introduced into each of the two chambers 3 and 4. The ventilation passages 5 and 6 are provided, and the mounting portion 8 to which the moving member 7 is attached is provided on the cylindrical body 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rodless cylinder device for linearly sliding a member.

[0002]

[Problems to be solved by conventional techniques and devices]

 Conventionally, various rodless cylinders such as a type in which a piston slides linearly by magnetic force have been proposed as rodless cylinders.

However, for example, a rodless cylinder that linearly slides a piston by magnetic force has a drawback that the phase of N · S of magnetic force is shifted when an excessive load acts on the piston.

In any case, the conventional rodless cylinder has a drawback that its structure is generally complicated and its manufacturing cost is high.

It is a technical object of the present invention to provide a rodless cylinder device that solves the above drawbacks.

[0006]

[Means for Solving the Problems]

 The gist of the present invention will be described with reference to the accompanying drawings.

A flexible and expandable cylinder body 2 is provided between the fixed side plates 1, the interior of the cylinder body 2 is divided into two chambers 3 and 4, and a fluid is introduced into each of the two chambers 3 and 4. The present invention relates to a rodless cylinder device characterized in that ventilation paths 5 and 6 are provided, and a mounting portion 8 to which a moving member 7 is attached is provided on the cylindrical body 2.

[0008]

When a fluid is introduced into one chamber 3 of the cylindrical body 2 and is led out from the other chamber 4, the chamber 3 into which the fluid is introduced expands and the chamber 4 into which the fluid is drawn contracts.

Therefore, since the mounting portion 8 provided on the cylindrical body 2 moves toward the chamber 4 from which the fluid is drawn out, the moving member 7 attached to the mounting portion 8 also moves in the same direction.

[0010]

【Example】

 The drawings illustrate embodiments of the present invention and are described below.

In the drawing, two L-shaped fixed side plates 1 are opposed to each other with a predetermined space therebetween, and two left and right bellows-shaped cylindrical bodies 2 a and 2 b formed by resin integral molding are arranged between the fixed side plates 1. A mounting portion 8 having a T-shaped cross section is provided between the bellows-shaped tubular bodies 2a and 2b, and a cylindrical moving member 7 is attached to the mounting portion 8. The fixed side plate 1, the bellows-shaped tubular bodies 2a and 2b, the mounting portion 8 and the bellows-shaped tubular bodies 2a and 2b are attached in a sealed state.

Further, the fixed side plate 1 is provided with ventilation holes which serve as ventilation paths 5 and 6, and the respective ventilation holes are connected to a fluid supply device (not shown).

Further, reference numeral 9 is a guide rod for restricting the bending of the bellows-shaped tubular bodies 2a, 2b, which is required when the length of the bellows-shaped tubular bodies 2a, 2b set appropriately is long. The guide rod 9 is arranged with a slight gap between the bellows-shaped cylinders 2a and 2b so that the bellows-shaped cylinders 2a and 2b may be bent to some extent without any problem. Reference numeral 10 is a guide rod for guiding the cylindrical mounting portion 8.

The bellows-shaped tubular bodies 2a and 2b may be integrally formed of a thin stainless material.

Since this embodiment has the above-mentioned configuration, for example, air is introduced into the bellows-shaped cylinder 2a from the ventilation hole of the left fixed-side plate 1 and the bellows-shaped cylinder is introduced from the ventilation hole of the right-side fixed side plate 1 in FIG. When the air of 2b is drawn out, the bellows-shaped cylinder 2a expands and the bellows-shaped cylinder 2b contracts, so that the mounting portion 8 moves to the side of the bellows-shaped cylindrical body 2b, so that it is attached to the mounting portion 8. The moving member 7 linearly slides to the left in FIG.

Contrary to the above, if the air is introduced into the bellows-shaped tubular body 2b and the air is guided from the bellows-shaped tubular body 2a, the moving member 7 linearly slides to the right in FIG.

Therefore, the moving member 7 can be linearly reciprocally slid by continuously repeating the introduction and extraction of air into and from the bellows-shaped tubular bodies 2a and 2b.

As described above, the present embodiment is a so-called rodless cylinder having a very simple structure in which the linear sliding amount can be easily adjusted by appropriately setting the lengths of the bellows-shaped tubular bodies 2a and 2b.

In this embodiment, the moving member 7 and the mounting portion 8 can be firmly fixed to each other, and the moving member 7 can be stably attached.

That is, in general, when a cylindrical moving member fitted on a rod is fitted to a rod of a cylinder device and is linearly slid, the guide rod and the cylindrical moving member are slid due to non-coincidence of cores. There is a problem in that the rod and the moving member are not firmly fixed to each other in order to prevent malfunction, and they are fixed to each other with a small amount of play, so that the mounting of the moving member is not stable.

In this embodiment, since the bellows-shaped tubular bodies 2a and 2b are flexible, they can be curved to some extent (the guide rod 9 is arranged with a gap provided between the bellows-shaped tubular bodies 2a and 2b). However, even if the mounting portion 8 and the moving member 7 are firmly fixed to each other, the above problem does not occur, and therefore, the moving member 7 can be stably attached.

[0022]

[Effect of the device]

 Since the present invention is configured as described above, the amount of sliding can be easily adjusted, and because of the extremely simple structure, the rodless cylinder device has excellent mass productivity and does not require manufacturing cost.

[Brief description of drawings]

FIG. 1 is a perspective view of the present embodiment.

FIG. 2 is a front view in which a part of this embodiment is cut away.

[Explanation of symbols]

 1 Fixed Side Plate 2 Cylindrical Body 3 Chamber 4 Chamber 5 Ventilation Path 6 Ventilation Path 7 Moving Member 8 Mounting Part

Claims (1)

[Scope of utility model registration request] 1. A flexible expandable cylinder is provided between the fixed side plates, the cylinder is divided into two chambers, and a ventilation path for introducing a fluid into each of the two chambers is provided. A rodless cylinder device characterized in that a mounting portion for attaching a moving member is provided on the rodless cylinder device.