JP3076761B2 - Work support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supporting a workpiece to be machined, and more particularly to a device for supplying a fluid for moving a piston by using a hose.

[0002]

2. Description of the Related Art Conventionally, as a device for supporting a workpiece to be machined, a fluid supplied from a metal air tube inserted through a shaft of a spindle as shown in Japanese Patent Application Laid-Open No. 5-104312 is applied to a spindle. The piston is moved by switching to the front or rear side of the hollow chamber in the base through the branch passage of the base rotating together with the base to move the piston, and the plurality of gripping claws on the front surface of the diaphragm are expanded or reduced with the movement of the piston. It is made to let.

[0003] The metal air tube is connected to the rotary joint and the base by screwing or the like.

[0004] Of course, even when a coolant liquid is required, the same applies to the metal tube of the coolant liquid.

[0005]

According to the metal tube as described above, a predetermined length is cut in accordance with the length of the spindle, and a thread for connection is formed on the outer periphery of the cut end. It takes a lot of trouble and cannot be reused for another machine, which increases the cost.

In particular, since the length of the spindle differs from machine to machine, it has been difficult to measure the length and cut the tube to match the measured length.

Further, since a thick tube is used for threading, the weight increases, and the weight increases due to the metal, and if the length is increased by a machine, bending occurs and the balance is increased. Easy to break.

[0008] Therefore, an object of the present invention is to make connection work extremely easy, and even if it becomes necessary to reuse it for another machine (a machine having a long spindle or a machine having a short spindle), it is necessary to newly purchase it. In addition, the terminal of the hose can be easily connected to the rotary joint and the connection can be released.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a base rotating with a spindle of a machine tool, a piston built in a hollow chamber provided in the base, and a hollow chamber. A passage provided so as to communicate with the front and rear of the piston, a fluid supply tube inserted into the axis of the spindle and connected to the respective passages, an outer peripheral edge fixed to the front peripheral edge of the base, and in the center A diaphragm provided to transmit the movement of the piston, a plurality of gripping claws provided on a front surface of the diaphragm, and a through hole formed in the axis of the spindle, and arranged at a rear end of the spindle. In a work support device comprising a flexible fluid tube having both ends connected to the fluid supply port of the rotary joint and the passage,
A support member is removably fitted into a tubular body provided at the end of the spindle, the rear surface of which is open. The respective tubes penetrate the support member so that they can be pulled out rearward, and a detent lock mechanism for the tube. Provide a tube holder such that the unlocking can be operated from the surface facing the rear of the support member, and insert and connect the end of the tube to the fluid supply path of the freely rotating rotating body of the rotary joint, Further, a configuration is adopted in which the rotating body is detachably connected to the cylindrical body via a fastener.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the embodiment of the present invention, as shown in FIG. 1, a hollow chamber 3 is provided in a base 2 which rotates together with a spindle 1 of a machine tool, and a piston 4 is incorporated in the hollow chamber 3. I have.

The base 2 is provided with a first passage 5 communicating with the front hollow chamber 3 of the piston 4 and a second passage 6 communicating with the rear hollow chamber 3 of the piston 4. When the fluid (air) is pumped from the second passage 6, the piston 4 moves forward, and when the fluid (air) is pumped from the first passage 5, the piston 4 moves backward.

Further, a front surface of the base 2 is opposed to the front surface at a predetermined interval, and an outer peripheral edge is fixed to a peripheral portion of the base 2 via a fixture (not shown) such as a bolt. The central part is pushed out by the retreat of piston 4,
A retractable diaphragm 7 is provided.

As the interlocking means for pushing out and pulling back the center of the diaphragm 7 as the piston 4 advances and retracts, a screw cylinder 8 projecting from the front center of the piston 4 and a screw hole 9 at the center of the diaphragm 7 as shown in FIG. Are connected by screwing, and the slide of the piston 4 is directly transmitted to the diaphragm 7.
The system in which the reciprocating motion of the piston is applied via a slider that slides via a ball may be adopted.

On the front face of the diaphragm 7, there are provided gripping claws 10 of the work A arranged appropriately.

The gripping claws 10 are radial (not shown).
The bolts 12 are screwed into screw holes 11 of the diaphragm 7 and attached.

The diaphragm 7 is made of, for example, a precipitation-hardened alloy as a raw material, is machined in a solution treatment state, is heat-aged and hardened to have an appropriate hardness, and has a large notch tensile strength.

Further, a rotary joint 15 having a first fluid supply path 13 and a second fluid supply path 14 is connected to the end of the spindle 1.
The fluid supply pipe 20 is connected to the supply path 14.

The outlet of the first supply passage 13 and the first passage 5
The two ends of a flexible tube 17 inserted into the through hole 16 in the axis of the spindle 1 are connected to the inlet of the second supply passage 14 and the inlet of the second passage 6.

The flexible tube 17 is made of, for example, nylon or other soft and light material, and may be any material that can be easily cut or bent.

Incidentally, as shown in FIG.
When a coolant injection nozzle 21 is provided at the center of the front surface of the nozzle, the inflow port 22 of the nozzle 21 and the outflow port 24 of the coolant supply path 23 of the rotary joint 15 are inserted through the through hole 16. Both ends of a tube 25 similar to the tube 17 are connected, and a coolant is supplied to the supply path 23 from a pipe 26.

In the case where only the tube 17 is provided at a fixed position in the through hole 16 (to prevent the balance from being disturbed), the tube 17 is used when both the tube 17 and the tube 25 are used. 25 is a spacer 31
It is held through.

The spacer 31 is made of a light material, for example, a synthetic resin, and is made of a disc 32 to be pushed into the through hole 16 and a through hole 33 through which the tubes 17 and 25 are densely inserted.
In order to improve the balance, the through holes 33 for the tubes 17 and 17 are provided at different positions of 180 °, and the through holes 33 of the tube 25 are provided at the center.

The terminal of the spindle 1 is shown in FIG.
As shown in FIG. 9, there is provided a tubular body 51 having an open rear surface that rotates together.

As shown in FIG. 3, the cylindrical body 51 is engaged with the end of the spindle 1 by fitting a concave portion 52 at the distal end to the end of the spindle 1. The cylindrical body 51 is connected to the spindle 1 by screwing the bolts 54 inserted into the through holes 53 into the screw holes 55 of the spindle 1, but they may be provided integrally or connected by other means.

A support member 56 is fitted into the cylindrical body 51 so as to be freely inserted and removed, and a tube 17 is fitted into the support member 56 (as shown in FIG.
If the tube 25 is used, the tube 25 is also provided with a tube holder 57 which penetrates rearward so as to be able to be pulled out and which allows the detent lock mechanism of the tube 17 to be operated from the rearward facing surface of the support member 56. It is.

As is well known (shown in FIGS. 4 to 7), the tube holder 57 is provided with a screw hole 58 of the support member 56.
, A sleeve 60 made of an elastic member which is pushed into and engaged with the screw cylinder 59, a lock claw 61 incorporated in the sleeve 60, and inserted inside the sleeve 60, A ring 62 whose leading edge is in contact with the lock claw 61;
When 2 is pushed in, the lock pawl 61 is pushed into the bottom of the sleeve 60 together with the ring 62, and the inner diameter of the lock pawl 61 is expanded by the radial slit 63 on the inner peripheral edge of the annular lock pawl 61 as shown in FIG. 8.

The pushing of the ring 62 is performed by the support member 5.
6, the plate-like members 64 are arranged on the back side, and a plurality of springs 65 are interposed between the support member 56 and the plate-like members 64 so that the plate-like members 64 are pushed back. When the inserted bolt 67 is screwed into the screw hole 68 of the plate-shaped body 64, and the plate-shaped body 64 is pulled by rotating the bolt 67 while compressing the spring 65 toward the support member 56, the bolt 67 can be pushed in. When the pulling of the plate 64 is released by the rotation operation of the plate 67, the plate 65 is
4 is pushed back, and the pushing of the ring 62 is released.

The support member 62 has a through hole 70 that matches the bottom through hole 69 of the screw cylinder 59, and the plate 64 has a through hole 70.
An insertion hole 71 for the tube 17 (and for the tube 25 when the tube 25 is used) is provided.

The rotary joint 15 is formed by overlapping the flange 73 of the rotating body 72 of the rotary joint 15 with the cylindrical body 51 and forming the through holes 74 of the flange 73.
Is screwed into the screw hole 76 of the tubular body 51 to be detachably connected to the tubular body 51.

Note that the first passage 5 and the second passage 6 are
Connecting tube 17 is airtight by coating adhesives
Or use a cylindrical screw-in type fastening fitting 19
Do it.

Of course, the tube 25 is
Connection is also made in the manner described above.

With the above configuration, before attaching the base 2 to the spindle 1, the length of the tube 17 to be attached to the base 2 via the clamp 19 is cut longer than the set length.

When the coolant liquid tube 25 is required, the tube 25 connected to the inflow port 22 of the nozzle 21 is required.
Also cut the length longer than the set length. The cylindrical body 51 is connected to the end of the spindle 1 via a bolt 54.

Thus, the tubes 17, 2,
While inserting 5, the base 2 is attached to the tip of the spindle 1. At this time, the tube 17,
25 project.

Thereafter, the ring 62 of the tube holder 57
Tube 1 with the terminals of tubes 17 and 25 preceding
7 and 25, and insert the tube 1 from the tube holder 57.
7 and 25 are pulled out, and the support member 5 is inserted into the tubular body 51.
Insert 6.

Then, first, unnecessary lengths of the ends of the tubes 17 and 25 are cut, and the first supply path 13 and the second supply path 1 are cut.
Insert the end of the tube 17 into the outlet 4 and the end of the tube 25 into the outlet 24 (leakage is prevented by an O-ring)
At the same time, the flange 73 of the rotary joint 15 is fixed to the tubular body 51 via the bolt 75.

The tube 17, due to some influence,
25, the tube 17, 2,
The lock claw 61 is prevented from being hooked on the outer periphery of the lock 5 and coming off.

When removing the base 2 from the spindle 1, first remove the bolt 75, disengage the flange 73 from the cylindrical body 51, and then use the rotary joint 15.
Remove.

Next, when the plate-like body 64 is drawn (to the support member 56 side) by the rotation operation of the bolt 67, the plate-like body 6 is pulled.
4. While pushing the lock pawl 61 into the ring 62, press the lock claw 61 together.

Then, the inner peripheral edge of the lock claw 61 is expanded, and the lock between the lock claw 61 and the tubes 17 and 25 is released.

Therefore, the support member 56 can be removed, the bolt 54 can be removed, and the spindle 1 can be removed.
Can be released from the cylindrical body 51.

Thus, the fixing of the base 2 to the spindle 1 is released, and the tube 1 is removed while the base 2 is removed.
Pull out 7, 25.

[0044]

As described above, according to the work supporting apparatus of the present invention, the terminal of the tube is detachably connected to the rotary joint, and the terminal of the tube is locked to the tube holder of the supporting member. Since the tube can be released, the tube together with the base of the work supporting device can be easily removed.

Therefore, the work such as the installation and replacement of the tube can be performed extremely smoothly.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a work supporting device of the present invention.

FIG. 2 is a cross-sectional view taken along line XX of FIG.

FIG. 3 is a partially cutaway enlarged side view showing the attachment of the tube of the present invention.

FIG. 4 is a sectional view taken along the line EE in FIG. 3;

FIG. 5 is a sectional view taken along the line FF in FIG. 3;

FIG. 6 is a sectional view taken along the line GG of FIG. 4;

FIG. 7 is a longitudinal enlarged side view of the holder.

FIG. 8 is a perspective view of a lock claw.

FIG. 9 is an exploded perspective view of a main part.

DESCRIPTION OF SYMBOLS 1 Spindle 2 Base 3 Hollow chamber 4 Piston 5 First passage 6 Second passage 7 Diaphragm 10 Gripping claw 13 First supply path 14 Second supply path 15 Rotary joint 16 Through hole 17 Tube 21 Nozzle 23 Coolant liquid Supply path 24 Outlet 25 Tube 31 Spacer 32 Disk 33 Through hole 51 Cylindrical body 52 Recessed portion 53, 69, 70 Through hole 54, 67 Bolt 55, 58 Screw hole 56 Support member 57 Holder 59 Screw cylinder 60 Sleeve 61 Lock Claw 62 Ring 63 Slit 64 Plate 65 Spring 68 Screw hole 71 Insertion hole 72 Rotator 73 Flange 74 Through hole 75 Bolt 76 Screw hole

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-104312 (JP, A) JP-A-53-57575 (JP, A) JP-A-5-111609 (JP, A) JP-A 63-575 225781 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B23B 31/32 B23B 31/30 F16L 1/00

Claims (1)

(57) [Claims] 1. A base which rotates together with a spindle of a machine tool, a piston built in a hollow chamber provided in the base, a passage provided so as to communicate before and after the piston in the hollow chamber, and the spindle A fluid supply tube inserted through the axis of the base and connected to the respective passages; a diaphragm fixed to the outer peripheral edge on the front peripheral edge of the base, and provided at the center to transmit the movement of the piston; and A plurality of gripping claws provided on the front surface, and a flexible joint which is inserted into a through hole in the axis of the spindle, and which is connected at both ends to a fluid supply port of the rotary joint and the passage which are arranged at the rear end of the spindle. In a work supporting device comprising a fluid tube, a rear surface provided at an end of the spindle is freely inserted into and removed from a cylindrical body having an open rear surface. The support member is fitted into the support member so that the tubes can be pulled out rearward and the lock of the detent lock mechanism of the tube can be unlocked from a surface facing the rear of the support member. A tube holder was provided, and the end of the tube was inserted and connected to a fluid supply path of a freely rotating rotator of the rotary joint, and the rotator was detachably connected to the tubular body via a fastener. A work supporting device, characterized in that: