JPH07205004A - Vacuum suction work holder - Google Patents

Abstract

PURPOSE:To work a workpiece with high accuracy, and also to prevent the poor suction when the workpiece is carried by making a holder that has been supported by a hairpin so as to be easily turned and tilted when the workpiece is worked. CONSTITUTION:A holder 2 for retaining a workpiece L is turnably and tiltably supported by a hairpin 1 to the end of which a globular supporting part 1a is formed, and a soft ring-shaped disphragm 6 is insertedly fitted in the groove that has been formed on the outer circumference of the hairpin 1, and a diaphragm chamber 7 is formed in the holder 2 so as to cover the surrounding of the diaphragm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work holder for vacuum suction that holds a work to be processed rotatably and tiltably, and holds the work by suction when the work is conveyed.

[0002]

2. Description of the Related Art Conventionally, a vacuum suction work holder that holds a work to be processed rotatably and tiltably and also holds a work when the work is conveyed has a spherical support portion at its tip as shown in FIG. Hawthorn 1 forming 1a
In addition, a holder 2 for holding the work L is rotatably and tiltably supported, and a packing 3 is fixed to the knapsack 1 so as to abut the upper surface of the holder 2 and cover a gap between the holder 2 and the knapsack 1. An air introduction path 5 is provided in the kanzashi 1 so that the inside of the holder 2 can be evacuated / compressed.

According to the work holder having the above structure,
Hold the workpiece L in the holder 2 without adsorbing it to the tool tray 4
When processing is performed by rotating and swinging the workpiece L, the holder 2 holding the workpiece L follows the movement of the tool tray 4 so that the workpiece L is brought into close contact with the tool tray 4 while rotating and tilting with respect to the bezel 1. keeping. Further, when the work L is attracted to the holder 1, the packing 3 always abuts the upper surface of the holder 2 even when the holder 2 is tilted with respect to the clearance 1, and the gap between the clearance 1 and the holder 2 is hermetically sealed to form a vacuum / pneumatic space. It does not leak.

[0004]

However, in the work holder having the above-mentioned structure, since the packing 3 is always in contact with the upper surface of the holder 2, the holder 2 is restricted from rotating or tilting with respect to the kanzashi 1. When the work L is machined, the work L is less likely to rotate dependently due to the rotation of the tool dish 4, and the work L is less likely to tilt freely so as to follow the movement of the tool dish 4, and as a result, the work surface of the work L is adversely affected. Therefore, it is difficult to stably and highly accurately process the work L. Further, since the packing 3 is always in contact with the upper surface of the holder 2, the packing 2 is not attached to the holder 2.
The rotating and tilting of the parts causes wear due to the use time and weakens the sealing effect, resulting in vacuum leakage and compressed air leakage, which is a cause of suction failure during work transfer.

[0005]

SUMMARY OF THE INVENTION The present invention has been invented based on the above circumstances, and a work piece having an air introduction path for sucking and discharging the work piece and a spherical support portion formed at the tip of the work piece is provided. The problem is solved by rotatably and tiltably supporting a holder that holds a diaphragm, a ring-shaped diaphragm made of a soft material is provided on one side of the holder and the seal, and a diaphragm chamber is provided on the other side so as to cover the periphery of the diaphragm.

[0006]

According to the present invention having the above structure, the workpiece is sucked
When the workpiece is ejected, the seal between the kanzashi and the holder is sealed.When the workpiece is not sucked and ejected, the diaphragm that is not in contact with the surroundings is vacuumed or pressurized on the wall of the diaphragm chamber that covers the diaphragm. This is done by bringing them into contact. As a result, during machining of the workpiece, there is no contact between the kanzashi and the holder other than the support part, so the holder easily rotates and tilts with respect to the kanzashi,
Work can be made to follow the movement of the tool plate smoothly. Further, since the diaphragm is not in contact with the wall surface of the diaphragm chamber during processing of the workpiece, it does not wear due to rotation or tilting of the holder with respect to the lance, so that the sealing effect does not weaken with use time.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an embodiment of the present invention. Kanzashi 1
At the end, there is provided a supporting portion 1a having a spherical end, and an air introduction path 5 penetrating the kakushi 1 and connected to a vacuum / compressed air generating means (not shown).

A ring-shaped diaphragm 6 made of a soft material such as rubber or nylon is fitted and attached to the kanzashi 1 by inserting it into a groove formed on the outer circumference of the kanzashi 1. Further, below the diaphragm 6, a protruding portion 1b protruding in the radial direction is formed.

The kanzashi 1 rotatably and tiltably supports a holder 2 having a diaphragm chamber 7 formed so as to come into contact with the supporting portion 1a so as not to fall on the protruding portion 1b and to cover the periphery of the diaphragm 6. ing.

The holder 2 has a holding portion 8 for holding the work L, and a mounting portion for screwing the holding portion 8 and having one surface of the diaphragm chamber 7 so that the protruding portion 1b of the Kanzashi 1 cannot be removed from the Kanzashi 1. 9 and the mounting portion 9 to be screwed into contact with the support portion 1a of the kanzashi 1 and the pilot chamber 12
And a case portion 11 that is screwed to the mounting portion 9 to form the diaphragm chamber 7 and are formed integrally. The holder 2 formed as described above is rotatable and tiltable with respect to the arrow 1 about the supporting portion 1a.

Next, description will be given of the case where the work L formed as described above is sucked and discharged from the work L. When a vacuum is generated by a vacuum / compressed air generating means (not shown), a vacuum force acts on the lower surface of the diaphragm 6 via the air introduction path 5 and the pilot chamber 12, and the diaphragm 6 is pulled down and adheres to the lower surface of the diaphragm chamber 7. As a result, the inside of the pilot chamber 12 becomes a vacuum state, and the work L is held by the holding section 8 and the suction ports 14 and 15 of the movable section 10.
Is sucked into. Further, when the compressed air is generated by the vacuum / compressed air generating means, the diaphragm 6 is pushed upward contrary to the above, the diaphragm 6 is brought into close contact with the upper surface of the diaphragm chamber 7, the pilot chamber 12 is in the compressed air state, and the work L is discharged from the holding portion 8. It

[0012]

As described above, according to the work holder of the present invention, since the diaphragm is not in contact with the periphery of the work holder when the work is processed, the holder can be smoothly rotated and tilted with respect to the kanzashi. Work pieces follow the movement of the tool tray and are always in close contact with each other for stable and high-precision processing. Also, since the diaphragm does not wear, vacuum and air pressure leaks do not occur even when used for a long time, and suction defects during work transfer Can be eliminated.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of a vacuum suction work holder according to the present invention.

FIG. 2 is a cross-sectional view of a conventional vacuum suction work holder.

[Explanation of symbols]

1 Kanzashi 1a Support part 2 Holder 4 Tool plate 5 Air introduction path 6 Diaphragm 7 Diaphragm room 12 Pilot room

Claims (1)

[Claims] 1. A holder for holding a work is rotatably and tiltably supported by a kanzashi having an air introduction path for sucking and discharging the work and a spherical support portion formed at a tip thereof. A work holder for vacuum suction, characterized in that an annular diaphragm made of a soft material is provided on one side of the kanzashi, and a diaphragm chamber is formed on the other side so as to cover the periphery of the diaphragm.