JPH0735741Y2 - Chuck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a chuck having a function of pushing a work.

[Conventional technology]

In recent years, it has been required to carry out the work of transporting the work and the action of pushing the work into, for example, the hole at the transport end position in a series of operations. Therefore, conventionally, in a chuck provided with a pair of arms that can be opened and closed, a push-in member is provided between both arms, and the push-in member is biased downward by a biasing force of a coil spring. There is. According to this configuration, by opening the arms while the work is sandwiched between the arms, the work is pushed downward by the pushing member and pushed into the hole.

[Problems to be solved by the device]

However, in the above-mentioned conventional chuck, since the pushing member is always biased downward, when the work is sandwiched by the arms, the pushing member must be pushed back by the work. That is, a force larger than the biasing force of the coil spring on the pushing member is applied to the work.

Therefore, if the work itself is not strong like a precision component, the work may be damaged, and the conventional chuck cannot be adopted.

The present invention has been made in view of the above circumstances, and its purpose is to carry out the work of transporting a work to a predetermined position regardless of the type of the work and the action of pushing the work into a hole or the like at the predetermined position. An object of the present invention is to provide a chuck that can be continuously performed within a series of operations and can be made compact as a whole.

[Means for Solving the Problems]

In order to achieve the above object, according to the present invention, a pair of arms is provided in a cylinder casing so as to be openable and closable, and two cylinder chambers are provided in the cylinder casing so as to be located on the same axis line. Pistons are provided, and the cylinder casing is formed with ports that communicate with the cylinder chambers and supply and discharge fluid independently to the cylinder chambers, and one piston is provided with a pushing member for pushing the work. The cylinder casing is provided with detection means for detecting the position of the piston rod on one side, and the tip of the rod of the other piston is connected to both arms so that both arms can be moved by retracting the piston. It has a structure that can be opened and closed.

[Action]

Therefore, in this invention, the work is clamped by both arms by closing the pair of arms by the action of the piston, the work is moved to a predetermined position in that state, and the pair of arms is opened by the action of the piston, When the pushing member pushes the work by the action of another piston, the work is pushed into a hole or the like provided at a predetermined position. Since the pushing member is configured to reciprocate by being connected to the piston of the cylinder, the pushing member with respect to the work can be inserted into the work when the work is inserted between the pair of arms as long as the fluid supply / discharge timing is controlled. The unreasonable power from is not added. Further, since the position of the piston corresponding to the pushing member is detected by the detecting means, when the pushing member is pushed up to the work when the work is inserted between the pair of arms, the movement of the pushing member is changed. It is detected by the detection means. As a result, it is possible to detect whether or not the work is reliably positioned between the arms by the detection means.

〔Example〕

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

As shown in FIGS. 1 and 2, a first cylinder chamber 2 and a second cylinder chamber 3 are provided in the cylinder casing 1 so as to be positioned on the same line. Further, one groove 1a is formed on the lower surface of the cylinder casing 1, and the second cylinder chamber 3 is opened at the bottom surface of the groove 1a. Each cylinder chamber
Pistons 4 and 5 are reciprocatingly arranged in 2 and 3, respectively, and a piston 4 arranged in the first cylinder chamber 2 is a spring 6
Is urged downward by. In addition, a first port 7 that communicates with the first cylinder chamber 2 and a second port 8 that communicates with the second cylinder chamber 3 are formed on the side portion of the cylinder casing 1. When air is supplied from the first port 7 to the first cylinder chamber 2, the piston 4 is moved upward against the biasing force of the spring 6, and air is supplied from the second port 8 to the second cylinder chamber 3. The piston 5 is moved downward.

A rod 9 is attached to the piston 4 arranged in the first cylinder chamber 2.
Is provided downwards, and its rod 9 is connected to the first cylinder chamber 2
Through the insertion hole 10 formed between the second cylinder chamber 3 and the second cylinder chamber 3 and penetrates the piston 5 of the second cylinder chamber 3 and the tip is located between the grooves 1a in the lower portion of the cylinder casing 1. Also, a seal ring is provided between the insertion hole 10 and the rod 9.
11 is provided and the reel cylinder 11 completely shuts off the first cylinder chamber 2 and the second cylinder chamber 3.
The piston 5 arranged in the second cylinder chamber 3 is provided with two support legs 12 located on both sides of the rod 9, and these support legs 12 extend downward in parallel with the rod 9 and extend in the cylinder casing 1. It projects from the bottom surface. A disc-shaped pushing member 13 is supported at the tips of the support legs 12, and a jig (not shown) for pushing the work is attached to the pushing member 13.

Between the groove 1a of the cylinder casing 1, a pair of L-shaped arms 14 composed of a horizontal piece 14a and a vertical piece 14b are provided so as to face each other. Each arm 14 has a groove formed in the cylinder casing 1 at a corner portion formed by a horizontal piece 14a and a vertical piece 14b.
It is rotatably supported by a support shaft 15 provided between 1a. The tip of the rod 9 of the piston 4 is formed to have a quadrangular cross section, and pins 16 are formed on both side surfaces thereof so as to project. An engaging recess 17 for engaging the pin 16 is formed at the tip of the horizontal piece 14a of each arm 14, and when the piston 4 reciprocates up and down, the horizontal piece 14a tilts and the arm 14 supports the support shaft 15. The vertical piece 14b is opened and closed by rotating about. Further, the vertical piece 14b is formed with a screw hole 18 for attaching a jig (not shown) for supporting the work.

Two sensor mounting grooves 19, 20 extending in the axial direction of both pistons 4, 5 are formed on the surface of the cylinder casing 1 opposite to the surface on which both ports 7, 8 are formed. 20
Detection switches 21 and 2 are mounted inside the pistons 4 and 5 at positions corresponding to the pistons 4 and 5, respectively. These detection switches 21 and 22 are equipped with magnetic sensors (not shown) for detecting the positions of the pistons 4 and 5, and permanent magnets 23 and 24 are provided on the outer circumference of the heads of the pistons 4 and 5. Installed. The positions of the pistons 4 and 5 can be detected based on the detection of magnetism of the permanent magnets 23 and 24 of the magnetic sensors installed in the detection switches 21 and 22, respectively.

The open / closed state of the arm 14 is determined by the vertical position of one piston 4, and the vertical position of the pushing member 13 is determined by the vertical position of the other piston 5. Therefore, the open / closed state of the arm 14 can be detected by detecting the position of the piston 4 on one side with the detection switch 21, and the up / down movement of the pushing member 13 by detecting the position of the piston 5 on the other side. The position can be detected.

Next, the operation of the chuck configured as described above will be described.

Now, when a chuck previously supported by a predetermined moving device (not shown) is moved to above the work and air is supplied from the first port 7 into the first cylinder chamber 2, the piston 4
Is moved upward against the urging force of the spring 6, and the lateral piece 14a engaged with the pin 16 at the tip of the rod 9 is tilted, whereby the arm 14 rotates about the support shaft 15. And
By the rotation, both vertical pieces 14b are closed, so that the workpiece is clamped by the jigs attached to both vertical pieces 14b. And in this state, air is not supplied from the second port 8,
Since the piston 5 is in a free state, the jig attached to the pushing member 13 comes into contact with the work and the piston 5 is pushed up.

Then, the chuck is moved to another position while holding the work, and the air in the first cylinder chamber 2 is discharged from the first port 7, and the air is discharged from the second port 8 into the second cylinder chamber 3. When supplied, one piston 4 is moved downward by the urging force of the spring 6, and the other piston 5 is also moved downward. When one of the pistons 4 is moved downward, the arm 14 is rotated and both the vertical pieces 14b are opened, so that the work clamped by the jigs attached to the both vertical pieces 14b is released. Further, when the other piston 5 is moved downward, the work is pressed by the jig attached to the pushing member 13 at the tip of the support leg 12, and the work is pushed into a hole (not shown) provided at a predetermined position. Pressed in.

Therefore, the work of transporting the work to another position and the work of pushing the work into the hole or the like at that position can be continuously performed in a series of operations. Also, in the normal state, the piston 5 of the second cylinder chamber 3 is located at the lower position,
When the work is clamped by the jig attached to the arm 14, the jig attached to the pushing member 13 contacts the work and pushes up the piston 5, so that the position of the piston 5 is detected by the detection switch. By detecting at 22, it is possible to reliably detect whether or not the work is clamped by the jig attached to the arm 14. Further, in this chuck, since the two cylinder mechanisms are built in one cylinder casing 1, it is possible to make the whole compact.

[Effect of device]

As described above in detail, according to the present invention, the work of transporting the work regardless of the type of the work and the work of pushing the work into the hole or the like can be continuously performed in a series of operations, Moreover, by incorporating two cylinder mechanisms in one cylinder casing, the whole can be made compact, and furthermore, whether or not the work is positioned between the arms can be reliably detected with a simple configuration. It has an excellent effect that it can.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of a chuck embodying the present invention, and FIG. 2 is a bottom view of the same. Cylinder casing 1, first cylinder chamber (cylinder chamber)
2, second cylinder chamber (cylinder chamber) 3, pistons 4,5,
The rod 9, the pushing member 13, the arm 14, and the detection switch 22 as the detection means.

Claims (1)

[Scope of utility model registration request] 1. A pair of arms (14) are provided in a cylinder casing (1) so as to be openable and closable, and two cylinder chambers (2, 2) are arranged in the cylinder casing (1) so as to be located on the same axis.
3) are provided, and the cylinder chambers (2, 3) are provided with pistons (4,5), respectively, and the cylinder casing (1) is in communication with the cylinder chambers (2, 3). Ports (7, 8) for independently supplying and discharging fluid are formed in (2, 3) respectively, and a pushing member (13) for pushing a workpiece is provided on one piston (5) on both arms (14). The cylinder casing (1) is provided with a detecting means (22) for detecting the position of the one piston (5), and the other end of the rod (9) of the other piston (4) is provided. A chuck characterized in that both arms (14) can be opened and closed by being connected to both arms (14) and the piston (4) protruding and retracting.