JPH06339888A - Gripper for part or the like - Google Patents

Abstract

PURPOSE:To thin the whole diameter, and slim it by reducing the number of part items, reducing weight, facilitating assembling, and reducing cost. CONSTITUTION:A part of a base body 3 is fitted in one end opening of a hollow cylinder body 1 having an opening on both ends so as to sandwich one end of an expansive body 2 between it and the cylinder body 1, and the exptensible - contractible tube shape expansive body 2 is rum along the inside of the cylinder body 1, and the other end side is folded back, and is fixed to the outside of the cylinder body 1, and a passage 6 is formed in the cylinder body 1 so as to supply and discharge fluid to a space 5 between the expansive body 2 and the inside of the cylinder body 1. One end side of the cylinder body 1 is worked so as to be fixed firmly to a part of the base body 3 while sandwiching one end of the expansive body 2 between them, and the expansive body 2 is expanded when the fluid is supplied to the expansive body 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for inflating an expanding and contracting expansive body such as a rubber tube to grab parts and the like.

[0002]

2. Description of the Related Art As a conventional device of this type, Japanese Patent Laid-Open No.
The one described in Japanese Patent No. 106295 is known. As shown in FIG. 4 and FIG. 5, this is because the distal end portion 10 of the hard substrate 101 is provided at the one end opening of the hollow cylindrical tubular body 100 having both end openings.
1A is inserted and fitted, and a tubular expander 102 is attached to the tip 101A and the other end of the tubular body 100. A passage 103 for supplying and discharging a fluid such as air to and from the expander 102 is formed in the hard substrate 101. When the fluid is supplied from the passage 103 to the sealed space 104, the expander 102 expands inward as shown in FIG. Further, the inflatable body 102 is fixed to the distal end portion 101A and the tubular body 100 by caulking rings 105 and 106.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention A conventional device is a cylinder 1
00, a hard base 101, an expander 102, and two caulking rings 105 and 106 are required, resulting in a large number of parts and an increase in weight. Also, the assembly is complicated, time-consuming, and costly. Furthermore, the presence of the crimp ring 105 has a limit in reducing the overall diameter.

Therefore, the present invention reduces the number of parts,
An object of the present invention is to provide a gripping device for components, etc., which is light in weight, easy to assemble, and cost-reducing, and which is capable of reducing the overall diameter to be slim.

[0005]

In order to achieve the above object, the present invention is directed to a part of a base body such that one end of an expander is sandwiched between one end opening of a hollow cylindrical tubular member having both end openings. The tube-shaped expander that expands and contracts inside the cylinder, and folds the other end back to secure it to the outside of the cylinder, and the fluid in the space between the expander and the inside of the cylinder. Is formed so that one end of the tubular body is firmly fixed to a part of the base body with one end of the expander sandwiched therebetween so that the expander expands when the fluid is supplied to the expander. It is configured in.

[0006]

In the device of the present invention, one caulking ring is unnecessary as compared with the conventional device if parts having the same size and thickness are grasped, and one end of the expander is held by the cylinder body and the base body. Therefore, it becomes a slim device with a small diameter as a whole. Also, the number of parts is reduced, and the weight can be reduced accordingly.
The number of assembling steps can be reduced and the cost can be reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

In the embodiment shown in FIG. 1, a part of a base body 3 is fitted into one end opening of a hollow cylindrical tubular body 1 having openings at both ends so that one end of an expander 2 is sandwiched between the tubular body 1. is there. The expander 2 is a tube-shaped member made of a rubber-like elastic body, and the expander 2 is attached along the inside of the cylinder 1. One end of the inflatable body 2 is sandwiched and held between the tubular body 1 and the base body 3, and the other end of the inflatable body 2 is fixed at the end portion of the tubular body 1 to the outside by a folding back ring 4. The space 5 between the expander 2 and the inside of the cylinder 1
A passage 6 is formed to supply and discharge the fluid. The portion of the base body 3 that fits into the tubular body 1 has a mounting portion 3 having irregularities formed on the outer peripheral surface.
It is formed in A, and the inner surface at one end of the inflatable body 2 is pressed against the unevenness of the mounting portion 3A. In addition, the upper end portion 1A of the cylindrical body 1
The caulking process or the like is performed so as to press-contact the mounting portion 3A via the inner surface at one end of the expander 2. Upper end 1A of the cylinder 1
The caulking ring 4 forms a sealed space 5 between the expander 2 and the cylinder 1. When a fluid such as air is supplied to the space 5 from the passage 6, the expander 2 expands inward as shown in FIG. A screw hole 3B for mounting is formed in the center of the base body 3. The mounting screw hole 3B is for screwing in a bolt or the like provided in a machine for moving the device.

In another embodiment shown in FIG. 2, a male screw 1B is formed in the intermediate portion of the outer peripheral surface of the cylindrical body 1, female screws 7B are formed in a large number of holes 7A formed in the connecting plate 7, and these male screw 1B and female screw are formed. 7B is screwed to attach a large number of gripping devices to the connecting plate 7. Also, hole 7
O-rings 8 are provided above and below A. Connection plate 7
Form a large number of holes 7A as shown in FIG.
A connecting path 7C is formed to supply and discharge a fluid such as air. Further, two or more connecting passages 7C are formed in the hole 7A of the connecting plate 7 without forming only one connecting passage 7C, and unnecessary connecting passages 7C are formed by fitting screws into the set screw portion 7D. It can be sealed.
Reference numeral 7E is a supply / discharge port of the connecting plate 7. When a large number of gripping devices are attached to the connecting plate 7 as described above, the component 10 or the like is inserted into the space surrounded by the inflatable body 2, and specifically, the connecting plate 7 is lowered from the state of FIG.
Then, a fluid such as air is supplied to the communication path 7C from the supply / discharge port 7E and is supplied into the space 5 via the path 6. At this time,
The inflatable body 2 can be inflated inward to grasp the component 10 or the like.

[0010]

As described above, according to the present invention, one end of the expander is not fixed by the caulking ring, but is held between the cylinder body and the base body, and the diameter of the entire device is reduced. When a large number of these devices are arranged to grab parts and the like, it is possible to use a larger number of devices than the conventional one within the same projected area. Further, since one end of the expander is not fixed by the caulking ring, the number of parts is reduced, assembly is facilitated, and cost can be reduced. Furthermore, as the number of parts is reduced, weight reduction and slimness can be achieved.

[Brief description of drawings]

FIG. 1 is a sectional view showing a preferred embodiment of the present invention.

FIG. 2 is a sectional view showing another example of the present invention.

FIG. 3 is a plan view showing a state where a connecting plate is used.

FIG. 4 is a sectional view showing a conventional example.

FIG. 5 is a cross-sectional view of a conventional example in which a fluid is injected.

[Explanation of symbols]

 1 Cylinder 2 Expander 3 Base 5 Space 6 Passage

Claims (1)

[Claims] 1. A tubular expansion that expands and contracts inside a tubular body by fitting a part of a base into one end opening of a hollow cylindrical tubular body with both ends opening so that one end of the expander is sandwiched between the tubular body and the tubular body. Along the body, the other end is folded back and fixed to the outside of the cylinder, a passage is formed in the cylinder between the expander and the inside of the cylinder to supply and discharge fluid, and one end of the cylinder expands. A gripping device for parts and the like, characterized in that it is processed so as to be firmly fixed to a part of a base body with one end of the body sandwiched therebetween, and that the expander expands when a fluid is supplied to the expander.