JPH0890476A - Rotary chuck - Google Patents

Abstract

PURPOSE: To provide a rotary chuck formed into small size and into compactness further to be capable of providing a proximity switch adjacent to a magnet. CONSTITUTION: In a casing 7 mounted in a body 5 of a swivel type actuator 4, an inserting hole 8, recessed part 11 of diameter larger than this hole and an axial direction switch mounting part 12, opened to the recessed part, are provided, to set up a body 6 of an air chuck 2 rotatably in the inserting hole 8, also to connect a shaft 22 of the swivel type actuator integrally rotatably in the recessed part. In the switch mounting part 12, a switch unit 15 is mounted, to mount in this unit a proximity switch of outputting a signal by approaching a magnet 10 provided in a piston 2a. In this way, since the switch mounting part 12 is opened to the recessed part, a total unit can be formed in small size and into compactness, further to make the proximity switch adjacent to the magnet 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary chuck for rotating and swinging a fluid pressure chuck.

[0002]

2. Description of the Related Art A fluid pressure chuck for gripping and releasing a work by a finger that opens and closes by supplying and discharging a pressure fluid,
A rotary chuck that includes a swing actuator in which a shaft rotates and swings due to supply and discharge of a pressure fluid, and a swing chuck that swings and swings a fluid pressure chuck about its axis is already known. The body of the fluid pressure chuck in the rotary chuck is rotatably installed in a casing connected to the body of the oscillating actuator. Further, this casing is provided with a space for rotating a stopper lever that rotates integrally with the shaft of the swing actuator, and an adjust bolt that abuts on the stopper lever and restricts a rotation angle of the swing actuator. ing.

When the adjusting bolt is provided in the direction orthogonal to the axial direction of the casing, the axial length of the chuck can be shortened as compared with the case where the adjusting bolt is provided in the axial direction, and the stopper lever contacts the adjusting bolt. The reaction force when touching can be reduced. However, if the adjusting bolt is provided in the direction orthogonal to the axial direction of the casing, the diameter of the space becomes large and the casing becomes large, so that the rotary chuck becomes large. Further, when the casing becomes large, the distance between the proximity switch attached to the outer surface of the casing and the magnet for position detection attached to the piston of the fluid pressure chuck becomes large, making it difficult to bring them close to each other. .

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a rotary chuck which is small and compact and which can bring a proximity switch close to a magnet.

[0005]

In order to solve the above-mentioned problems, a rotary chuck of the present invention comprises a fluid pressure chuck for holding and releasing a work by opening and closing fingers with a piston that slides by supplying and discharging pressure fluid. In a rotary chuck including a swing actuator in which a shaft rotates and swings by supplying and discharging a pressure fluid, a magnet for position detection is attached to the piston, and a casing connected to the body of the swing actuator is An insertion hole in the axial direction for inserting the body of the fluid pressure chuck, a recess having a diameter larger than that of the insertion hole on the swing actuator side, and an axial switch mounting portion opening in the recess are provided. The body of the fluid pressure chuck, which is rotatably installed on the shaft, and the shaft of the swing-type actuator are connected so that they can rotate together in the recess. , On either side of the switch mounting portion of the casing, the adjustment bolt for restricting the rotation angle of the hydraulic chuck, have been installed to be movable forward and backward in a direction substantially perpendicular to the axial direction of the casing protruding tip in the recess,
A switch unit having a proximity switch for outputting a signal when the magnet approaches is mounted on the switch mounting portion.

In order to solve the same problem, a stopper guide is integrally rotatably attached to a shaft of an oscillating actuator in the rotary chuck, and rotatably oscillates integrally with the body of the fluid pressure chuck together with the stopper guide. In addition, a stopper lever that comes into contact with the adjusting bolt is attached.

Further, in order to solve the same problem, in these rotary chucks, a switch unit is detachably attached to a switch attaching portion.

[0008]

The casing is provided with an axial switch mounting portion that opens into a recess having a diameter larger than the insertion hole provided in the casing, and adjustment bolts whose tips project into the recess on both sides of the opening are provided. By mounting the casing so that it can move back and forth in the direction orthogonal to the axial direction, the casing can be made compact even if the diameter of the recess is increased by the adjusting bolt, which makes the rotary chuck compact and compact. You can Also,
The switch unit attached to the switch mounting portion can close the opening of the switch mounting portion,
Moreover, the magnet attached to the piston of the fluid pressure chuck and the proximity switch attached to the switch unit can be brought as close as possible to each other.

When the shaft of the oscillating actuator rotates, the fluid pressure chuck integrally rotates about its axis, and the stopper lever that rotates integrally with the shaft is
These rotation angles are regulated by abutting the adjustment bolt attached to the casing, and the rotation angle can be adjusted by advancing and retracting the adjustment bolt with respect to the casing. Also, when the magnet that moves with the piston of the fluid pressure chuck approaches the proximity switch provided in the switch unit, the proximity switch outputs a signal, so the position of the piston of the fluid pressure chuck, in other words, the opening / closing position of the finger, is changed. Can be detected.

Specifically, a stopper guide is integrally rotatably attached to the shaft of the swinging actuator in the recess, and is rotatably and swingably united with the stopper guide on the body of the fluid pressure chuck. By attaching the stopper lever that comes into contact with the fluid pressure chuck, the fluid pressure chuck can be rotated and swung about its axis, and the rotation angle thereof can be regulated.

Further, since the switch unit is detachably attached to the switch attaching portion, the proximity switch can be inspected or replaced by detaching the switch unit as needed.

[0012]

1 shows an embodiment of the present invention in which a rotary chuck 1 has a piston 2 which slides by supplying and discharging compressed air.
A plurality of fingers 3, ... Are opened and closed by a and 2b, and a known air chuck 2 that grips and releases a work (not shown) and the air chuck 2 is rotated and rocked by supplying and discharging compressed air. A vane-type swing actuator 4 is provided, a casing 7 is attached to a body 5 of the swing actuator 4 by an appropriate means (not shown), and a body 6 of the air chuck 2 is a casing 7.
Bearings 9 and 9 are rotatably attached to the axial insertion hole 8 provided in the. In addition, the piston 2
A ring-shaped magnet 10 for position detection is attached to a.

Although the illustrated air chuck 2 is a parallel open / close chuck in which two fingers 3 and 3 are opened / closed in parallel, the fluid pressure chuck of the present invention is not limited to this, for example, 3 It is also possible to use a chuck in which one or four fingers are opened and closed in parallel, or a swing open / close chuck in which a plurality of fingers swing around a base.

In the casing 7, a recess 11 having a diameter larger than that of the insertion hole 8 is provided on the side of the swing actuator 4, and an axial switch mounting portion 12 that is open to the recess 11 and is close to the insertion hole 8 is provided on one side surface. The protrusions 1 on the opening side are formed on both sides of the switch mounting portion 12 in the axial direction.
The switch unit 15 is attached between the attachment surfaces 3 and 13 and the attachment surfaces 14 on the center side (see FIGS. 3 and 4). As shown in FIG. 3, the switch unit 15 is locked to the unit body 16, the switch grooves 17, 17 formed in the axial direction of the unit body 16, and the bottom surface of the recess 11 integrally formed on both sides. Locking part 18,
Proximity switches 19 and 19 (see FIG. 5) are mounted in the switch grooves 17 and 17 so as to be movable along the grooves 17 and fixable at an arbitrary position. Reference numeral 19 is a magnetic proximity sensor or a high-frequency transmission proximity sensor that outputs a signal when the magnet 10 approaches.

In the switch unit 15, the inner and outer surfaces of the unit body 16 have projections 13, 13 and a mounting surface 14,
14 and the locking portions 18, 18 are locked to the body 5 of the swing actuator and the bottom surface of the recess 11 to be mounted on the switch mounting portion 2 (see FIG. 4).
On the other hand, on both sides of the switch mounting portion 12 of the casing 7, adjusting bolts 21 and 21 having tips projecting into the recessed portion 11 are screwed, and the forward and backward positions thereof are the lock nuts 2.
It is fixed by 1a and 21a.

The vane-type swing actuator 4 has a shaft 22 driven by compressed air supplied to and discharged from a pressure chamber (not shown) between a vane and a stopper provided in the body 5.
Is configured as a well-known vane-type swinging actuator that rotates and swings, and a stopper guide 23 having a magnet 24 at its tip is integrally rotatably attached to the tip of a shaft 22 protruding toward the casing 7. However, the swing actuator 4 is not limited to the vane type, and another swing actuator can be used as long as the air chuck 2 is rotated and swung by the shaft 22.

A plate-shaped stopper lever 26 is provided on the end surface of the body 6 of the air chuck 2 and the mounting bolt 2 is attached thereto.
It is mounted concentrically with the body by 7, ... (See FIG. 2). The stopper lever 26 is provided with an arm portion 28 that projects radially outward from the dish-shaped portion and a projection portion 29 that is inserted into the insertion hole of the stopper guide 23 inside.

In FIG. 5, reference numerals 31 and 31 are ports for supplying / discharging compressed air to / from the pressure chamber of the oscillating actuator 3, and reference numerals 32 and 32 are magnets 24 attached to the stopper guide 23.
It is a swing position detection switch that outputs a signal when it is approached, and is embedded in the body 5.

In the above embodiment, when compressed air is supplied to and discharged from the air air chuck 2 through a port (not shown), the fingers 3 of the air chuck 2 open and close to grip and release the work. When compressed air is supplied to and discharged from the oscillating actuator 4 through the ports 31 and 31, the shaft 22
And the stopper guide 23 and the stopper lever 26 that rotate and swing integrally with the shaft 22 cause the air chuck 2 to rotate and swing about its axis. Therefore, the rotation angle of the air chuck 2 can be regulated by the arm portion 28 of the stopper lever 26 coming into contact with the adjusting bolts 21 and 21. When the adjusting bolts 21 and 21 are moved forward and backward with respect to the casing 7, The rotation angle of the chuck 2 can be adjusted. Also,
The magnet 10 attached to the piston 2a is the switch unit 1
When the proximity switches 19, 19 attached to the switch 5 are approached, the switches 19, 19 output a signal, so that the open / closed positions of the fingers 3, ... Can be detected.

In the above-described embodiment, the outer surface of the casing 7 is provided with the axial switch mounting portions 12 opening into the recess 11 having a diameter larger than that of the insertion hole 8 in the casing 7, and the tips of the switch mounting portions 12 are located on both sides of the recess 11. Adjusting bolts 21, 2 protruding in the direction
Even if the diameter of the concave portion 11 is increased by adjusting bolts 21 and 21 in the direction orthogonal to the axial direction, the casing 7 can be downsized by screwing the screw 1, so that the rotary chuck 1 is small and compact. It can be anything. Further, the switch mounting portion 12 provided on the casing 7 is the body 1 of the switch unit 15.
Closed by 6.

Further, the proximity switches 19, 19 provided on the unit body 16 for closing the switch mounting portion 12
Then, the magnet 10 provided on the piston 2a can be brought as close as possible. Further, since the switch unit 15 is detachably attached to the switch attaching portion 12 by the projections 13 and 13 and the attaching surfaces 14 and 14 provided on both sides of the switch attaching portion 12, the switch unit 15 can be detached if necessary. The proximity switch 19 can be inspected or replaced.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of an embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an exploded perspective view of a casing and a switch unit.

FIG. 4 is a perspective view of the same assembled state.

FIG. 5 is a front view of the embodiment.

FIG. 6 is a rear view of the same.

[Explanation of symbols]

 1 Rotary Chuck 2 Air Chuck 2a Piston 3 Finger 4 Swing Type Actuator 5, 6 Body 7 Casing 8 Insertion Hole 10 Magnet 11 Recess 12 Switch Mounting Part 15 Switch Unit 19 Proximity Switch 21 Adjust Bolt 22 Shaft 23 Stopper Guide 26 Stopper Lever

Claims (3)

[Claims] 1. A fluid pressure chuck that opens and closes a finger by a piston that slides when pressure fluid is supplied and discharged to grip and release a work, and an oscillating actuator in which a shaft rotates and swings when pressure fluid is supplied and discharged. In the provided rotary chuck, a magnet for position detection is attached to the piston, and a casing connected to the body of the swing actuator has an axial insertion hole for inserting the body of the fluid pressure chuck, and The body of the fluid pressure chuck rotatably installed in the insertion hole and the oscillating actuator are equipped with a recess having a diameter larger than that of the insertion hole on the oscillating actuator side and an axial switch mounting portion opening to the recess. The shaft is integrally rotatably coupled in the recess, and the casing of the fluid pressure chuck is provided on both sides of the switch mounting portion of the casing. Adjust bolt that regulates the rotation angle,
A switch unit having a proximity switch that outputs a signal when the magnet approaches is attached to the switch attachment portion so that the tip is projected into the recess so that it can be moved back and forth in a direction substantially orthogonal to the axial direction of the casing. Characteristic rotary chuck. 2. A stopper guide is attached to a shaft of an oscillating type actuator so as to be able to rotate integrally, and a stopper lever is attached to a body of a fluid pressure chuck so as to rotate and oscillate integrally with the stopper guide and abut against an adjusting bolt. The rotary chuck according to claim 1, wherein. 3. The rotary chuck according to claim 1, wherein the switch unit is detachably attached to the switch attachment portion.