JPH0518063Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a chuck for gripping and transporting parts and the like.

[Prior art]

As a chuck for gripping parts, etc., especially a small chuck, the present applicant had previously proposed and put into practical use Japanese Patent Laid-Open No. 61-76292, and it has been widely used because it is small and lightweight and double-acting. Since the two cylinders for opening and closing the claws are arranged one above the other, the dimensions are long, and the operating speed does not fully satisfy the high-speed requirements.

[Purpose of invention]

In view of the above points, the present invention proposes a double-acting chuck that is small in size, short in size, fast in operation, light in weight, simple in structure, and easy to assemble.

[Structure of the idea]

In order to achieve the above object, the present invention has a double structure for the cylinder (inside and outside) to reduce the weight of the piston. a second piston that is slidable within the cylinder portion of the first piston; a second fluid passage provided above the cylinder body; a second fluid passage formed in communication with the cylinder portion through a passage; a pawl provided on the opening side of the cylinder body that can be freely opened and closed; forward and backward movements of the first and second pistons are transmitted to the pawl. The above objective was achieved by providing an action lever that

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

Structure The cylinder 1 is provided with a cylinder portion 12 with a lower opening, which communicates with a closing fluid passage 10 at the upper end and with an opening fluid passage 11 at the side. The first one is on the bottom.
Notch 1 for guiding the pressing piece 20 of the piston 2 of
4. Side surface 1 that guides the reference piece 40 of the slide claw 4
3 is formed.

The first piston 2 is slidably fitted into the cylinder part 12, and seal rings 24, 24 block communication between the passages 10, 11, and an annular groove 22, which connects the lower opening cylinder part 21 and the passage 11, Passage 2
It communicates via 3. At the bottom, pressing pieces 20, 20 extending on both sides and bent downward form the notch 1.
4 and 14 to prevent rotation.

The first piston 2 has a cylinder portion 21 with a closed top end and a bottom opening, into which the second piston 9 is slidably fitted, connecting the cylinder portion 21 and a fluid chamber 91 with an upper opening into an annular shape. They are communicated via grooves 92 and passages 93, and are isolated from the outside air by seal rings 24.

Shafts 5, 5 provided in the lower notch part of the cylinder 1
are the fulcrum holes 30, 30 of the action levers 3, 3.
is fitted so that it can rotate freely. The shafts 5, 5 pass through sleeves 6, 6 press-fitted into holes 15, 15 of the cylinder 1, and are prevented from coming off by retaining rings 8, 8.

In the lower notch of the cylinder 1, the reference pieces 40, 40 of the slide claws 4, 4 are fitted into the side surfaces 13, 13 with the action levers 3, 3 in between, and the shaft 5,
The guide slots 41, 4 are inserted into the bearings 7, 7 fitted in the guide slots 41, 4.
1 is fitted, and the slide claws 4, 4 are guided in the direction of the elongated hole so as to be freely openable and closable.

The action lever 3 has a substantially triangular shape, and one end 3
3 is in contact with the pressing piece 20, and the protruding piece 32 on the opposite side is the second
The lower end 90 of the piston 9 contacts the lower end notch 3 of the piston 9.
1 is fitted with a pin 42 of the slide claw 4.

The slide claw 4 is centered above the action lever 3.
A notch 44 with the same width is formed, and a pin 42 is fixed therein, and a guide elongated hole 41 in the sliding direction is formed in a reference piece 40 that is tilted upward on one side to match the distance between the shafts 5, 5. It is formed in two places. This elongated hole may be one continuous hole or may be one opening.

The slide claws 4, 4 are common to the left and right, and when they are made to face each other (turned by 180 degrees), the reference pieces 40, 40 face the opposite side through the notches 44, 44, respectively, and are combined, and the notches between them are combined. The action levers 3, 3 are rotatably inserted into the parts 44, 44, and the pins 42, 4 are inserted into the notches 31, 31 of the action levers 3, 3.
2 is fitted, so the action levers 3, 3
The slide claws 4, 4 are adapted to be interlocked with the rotation of.

That is, the action levers 3, 3 transmit the forward and backward movement of the first and second pistons 2, 9 to the slide claws 4, 4.

Function Pressurized air is sent to the fluid passage 11, and the fluid passage 1
When exhausting air from 0 (communicated with atmospheric pressure), fluid chamber 91
is pressurized and the second piston 9 descends and the first piston 2 rises, so the action levers 3, 3
are rotated in opposite directions from the state shown in FIG. 1, and the slide claws 4, 4 open.

Conversely, when pressurized air is sent to the fluid passage 10 and exhausted from the fluid passage 11 (communicated with atmospheric pressure), the cylinder portion 12 is pressurized and the first piston 2 is lowered.
As the second piston 9 rises, the action levers 3, 3 return to the state shown in FIG. 1, and the slide claws 4, 4
closes.

Therefore, it becomes a chuck that grips parts etc. with either of these and releases them with the other.

Although not shown in the drawings, the slide claws 4, 4 are used with fingers fixed thereto for gripping parts and the like.

[Example of change]

In the above embodiment, the sliding pawl is opened and closed via the action lever, but other mechanisms may be used.If a rotating pawl is used instead of the sliding pawl, the action lever and the rotating pawl can be integrated. 1st, 2nd
The rotating claw can be rotated directly by the piston.

[Effect of idea]

With the above-mentioned configuration, the present invention is a double cylinder with the first piston as a cylinder, which shortens the overall dimensions and makes it more compact.At the same time, the volume of the piston is reduced, which makes it lighter and allows pressurized air to flow. , etc., and the second piston is also smaller and lighter, allowing for faster operation. In addition, a small and lightweight double-acting chuck has been created that has a small number of parts, is easy to process and assemble, and is compact and lightweight.

In addition, in the embodiment, common parts such as the slide pawl, shaft, and action lever can be used for both the left and right sides, and fluid control such as air, which is often used in chucks, can be used as is. Of course, the fluid is not limited to air, but may also be hydraulic pressure.

[Brief explanation of drawings]

Figure 1 is a sectional view of an embodiment of the invention with the chuck closed, Figure 2 is its top view, Figure 3 is the bottom view, Figure 4 is a sectional view of the shaft, and Figure 5 is the cylinder. Parts drawing (front view/side view) Fig. 6 shows the outline of the slide claw. 1... Cylinder, 2... First piston, 3...
...Action lever, 4...Slide claw, 9...
second piston.

Claims (1)

[Claims for Utility Model Registration] A first piston that is slidable in a cylinder body with a bottom opening and has a cylinder portion with a closed top end and a bottom opening, and a second piston that is slidable in the cylinder portion of the first piston. a piston, a first fluid passage provided above the cylinder body, a first fluid passage formed on the side of the cylinder body so as to communicate with the cylinder portion via a passage on the side of the first piston; A double-cylinder double-acting chuck equipped with a pawl provided on the opening side of the main body that can be opened and closed, and an action lever that transmits the forward and backward movement of the first and second pistons to the pawl.