WO2006046420A1

WO2006046420A1 - Work support

Info

Publication number: WO2006046420A1
Application number: PCT/JP2005/018974
Authority: WO
Inventors: Gaku Yoshimura
Original assignee: Kosmek Ltd.
Priority date: 2004-10-25
Filing date: 2005-10-14
Publication date: 2006-05-04
Also published as: JPWO2006046420A1

Abstract

A work support, comprising a housing (3) fitted to the storage hole (1a) of a fixed block (1), a support rod (8) inserted in the housing (3) so as to be axially advanced and retreated, a first operating chamber (23) into which a pressure fluid is supplied to lock the support rod (8), and a second operating chamber (36) into which the pressure fluid is supplied to axially advance the support rod (8). The second operating chamber (36) and a restriction chamber (47) are downwardly disposed at the inner bottom part of the housing (3) in this order. A restriction member (48) having a restriction passage (51) is detachably installed in the restriction chamber (47). The second operating chamber (36) is allowed to communicate with a fluid port (P) through the restriction passage (51).

Description

Work support

Technical field

TECHNICAL FIELD [0001] The present invention relates to a work support, and more specifically to a technique for supporting a work machined by a machine tool.

Background art

[0002] Conventionally, this type of work support is described in the following Patent Document 1 (Japan. JP 2002-283161 A). The conventional work support is structured as follows.

A housing mounted in the receiving hole of the fixed block, a support rod inserted into the housing so as to be movable back and forth in the axial direction, a first working chamber in which pressure oil is supplied so as to lock the support rod; A second working chamber to which pressure oil is supplied so that the support rod can advance in the axial direction. The second working chamber is formed in the bottom of the housing and communicates with a hydraulic port provided in the bottom wall of the receiving hole.

Patent Document 1: Japanese Patent Laid-Open No. 2002-283161

Disclosure of the invention

Problems to be solved by the invention

[0003] In the conventional work support described above, when pressure oil is slowly supplied to the second working chamber, it is necessary to provide a throttle valve in the middle of the hydraulic piping connected to the hydraulic port. To.

However, in this configuration, the installation work of the throttle valve is labor intensive, and the throttle valve also protrudes the hydraulic piping force, resulting in a large piping system.

An object of the present invention is to provide a work support capable of solving the above-mentioned problems.

In order to achieve the above object, according to the present invention, for example, as shown in FIG. 1, the work support is configured as follows. The housing 3 mounted in the receiving hole la of the fixed block 1, the support rod 8 inserted into the housing 3 so as to be able to advance and retreat in the axial direction, and the pressure fluid supplied so as to lock the support rod 8. 1 has a working chamber 23 and a second working chamber 36 to which a pressure fluid is supplied so that the support rod 8 can advance in the axial direction. In the bottom of the housing 3, the second working chamber 36 and the throttle chamber 47 are sequentially arranged in the bottom direction. A throttle member 48 having a throttle path 51 is attached to the throttle chamber 47. The second working chamber 36 is configured to be able to communicate with the fluid port P provided in the bottom wall lb of the accommodation hole la through the throttle path 51.

[0005] The present invention has the following effects.

When supplying the pressure fluid to the second working chamber, the pressure fluid of the pressure source is supplied to the fluid port provided in the bottom wall of the accommodation hole. Then, the pressure fluid is gently supplied to the second working chamber through the throttle path of the throttle member attached to the bottom of the housing.

For this reason, unlike the above-described prior art, the present invention does not require a throttle valve in the middle of the pressure pipe connected to the fluid port. Therefore, it is possible to save the trouble of attaching the throttle valve as described above, and the piping system becomes compact by omitting the throttle valve.

Since the bottom space of the housing can be used effectively as the installation space for the throttle member, a compact work support can be provided.

In the present invention, it is preferable that the throttle member 48 is detachably attached to the throttle chamber 47.

In this case, a diaphragm member having a desired diaphragm resistance can be manufactured by changing the cross-sectional area and length of the diaphragm path. Therefore, by replacing the throttle member, the supply speed of the pressure fluid from the fluid port to the second working chamber can be set to a desired value.

In the present invention, the second working chamber 36 may be communicated with the first working chamber 23 via another throttle path 52 provided in the throttle member 48.

In this case, the pressure increase in the first working chamber is delayed from the pressure increase in the second working chamber. Therefore, the advancement operation and the locking operation of the support rod can be reliably separated.

[0008] Furthermore, the work support of the present invention is preferably configured as follows.

That is, a collet 11 externally fitted to the support rod 8, a transmission tool 15 externally fitted with a taper gap 17 in the collet 11, an intermediate member 18 inserted into the taper gap 17, the transmission tool 15 and A first piston 22 for reducing the diameter of the collet 11 via an intermediate member 18, the first working chamber 23 to which a pressure fluid for driving the first piston 22 is supplied, and the support rod 8 are axially arranged. The second piston 34 is arranged so as to be capable of moving forward and backward, and the second working chamber 36 to which the pressure fluid that drives the second piston 34 is supplied is provided.

In this case, the collet can be smoothly reduced and released through the intermediate member, so that the support rod can be reliably locked and released. This provides practical work support.

Brief Description of Drawings

FIG. 1 is an elevational sectional view showing a released state of a work support according to an embodiment of the present invention.

Explanation of symbols

[0010] 1: Fixed block (work pallet), la: receiving hole, lb: bottom wall, 3: nosing, 8: support rod, 11: collet, 15: transmission, 17: taper clearance, 18: ball ( Intermediate member), 22: First piston, 23: First working chamber, 34: Second piston, 36: Second working chamber, 47: Throttle chamber, 48: Throttle member, 51: Throttle path, 52: Other Restrictor, P: Fluid port (hydraulic port).

BEST MODE FOR CARRYING OUT THE INVENTION

[0011] FIG. 1 illustrates an embodiment of the present invention. In this embodiment, the case where the present invention is applied to a hydraulic work support is illustrated. First, the structure of the work support will be explained.

A receiving hole la is formed in the work pallet 1 which is a fixed block. A fluid port P through which pressure oil is supplied and discharged is provided at the center of the bottom wall lb of the accommodation hole la.

The housing 3 of the work support 2 is screwed tightly into the accommodation hole la. So The housing 3 includes an upper end wall 4, a lower end wall 5, and a body portion 6. A support rod 8 is inserted into the housing 3 so as to be movable in the vertical direction. On the upper part of the support rod 8, a push bolt 9 to be brought into contact with the workpiece W is provided.

[0012] A holding and fixing region R is provided in the lower half portion of the outer peripheral surface of the support rod 8, and a cylindrical collet 11 is fitted on the holding and fixing region R. The collet 11 is provided with a tapered outer peripheral surface 12 with an upper concavity, and can be enlarged and reduced in the radial direction by providing one slit 13 extending in the vertical direction. An annular transmission 15 is arranged on the outer peripheral side of the collet 11, and the tapered inner peripheral surface 16 of the transmission 15 is opposed to the tapered outer peripheral surface 12 of the collet 11 from above. A large number of balls (intermediate members) 18 are inserted into an annular taper gap 17 formed between the tapered outer peripheral surface 12 and the tapered inner peripheral surface 16.

The collet 11 is pressed against the lower end wall 5 by a rubber elastic body 19. Note that the elastic body 19 may be constituted by a spring member such as a corrugated washer, a dish panel, or a coil panel, instead of rubber.

[0013] The working first cylinder 20 includes a first cylinder hole 21 formed in the inner periphery of the body portion 6 of the housing 3, an annular first piston 22 inserted into the first cylinder hole 21, and A first working chamber 23 for lowering the first piston 22 and a first panel 24 for raising the first piston 22 are provided. The first panel 24 is mounted in a first panel chamber 25 formed on the lower side of the first piston 22.

More specifically, the upper portion of the first piston 22 is guided tightly to the upper end wall 4 by the sealing tool 26, and the lower portion of the first piston 22 is another sealing tool. 27 is guided by the lower end wall 5 in a tight manner. Then, by supplying the pressure oil to the first working chamber 23, a downward force acts on the large-area annular pressure receiving surface formed in the upper half of the first piston 22, and the first An upward force acts on a small-area annular pressure receiving surface formed in the lower half of the piston 22, and the first piston 22 is lowered by the differential force between the upper and lower sides.

Here, although both the first piston 22 and the transmission 15 are formed integrally, the two may be configured separately.

A second cylinder 32 for advancing and retreating is provided in the lower part of the housing 3. The second silin Da 32 is structured as follows! RU

A second cylinder hole 33 is formed in the lower half of the housing 3, and the second piston 34 is inserted into the second cylinder hole 33 in the middle of the second cylinder hole 33 in a tight manner. An operation bolt 35 is screwed to the second piston 34 and the operation bolt 35 is inserted into the support rod 8. A second working chamber 36 formed on the lower side of the second piston 34 can communicate with the first working chamber 23 via a communication passage 37.

A second panel chamber 39 is formed above the second piston 34. That is, the sleeve 40 protrudes upward from the lower end wall 5 of the housing 3. A second panel 41 for lowering the second piston 34 is mounted between the upper portion of the sleeve 40 and the second piston 34.

[0016] A pipe 42 is externally fitted to the operation bolt 35 described above. A pulling force is applied to the operation bolt 35 by pressing the noise 42 between the upper portion of the operation bolt 35 and the second piston 34.

An operation part 43 provided on the upper part of the noise 42 is engaged with the operated part 8a of the support rod 8 from above. Further, an advancement panel 45 mounted between the second piston 34 and the operated portion 8a urges the support rod 8 upward.

In addition, a throttle chamber 47 is formed below the second cylinder hole 33. That is, the second working chamber 36, the throttle chamber 47, and the force are arranged in the bottom direction of the housing 3 in the lower end wall 5 that is the bottom of the housing 3.

A cylindrical throttle member 48 is detachably attached to the throttle chamber 47 described above. Here, the throttle member 48 is fitted in the throttle chamber 47 below the second cylinder hole 33. Alternatively, the throttle member 48 may be screwed to the throttle chamber 47.

A concave portion 49 that receives the lower portion of the second piston 34 is formed on the upper portion of the throttle member 48. When the throttle path 51 is formed in the axial center portion of the cylindrical throttle member 48, another throttle path 52 is formed in the peripheral wall portion of the throttle member 48 of the same.

The second working chamber 36 is communicated with the fluid port P through the throttle path 51. Further, the second working chamber 36 is communicated with the first working chamber 23 via the another throttle path 52 and the communication path 37.

Note that the first panel chamber 25 includes the slit 13, the longitudinal path 55 in the lower end wall 5, and the The air is communicated with the outside air through a respiratory path (not shown) in the work pallet 1 in order. Further, the second panel chamber 39 is communicated with the longitudinal path 55 through a fitting gap between the sleeve 40 and the support rod 8 or the like.

The operation of the work support 2 will be described with reference to FIG.

In the released state of FIG. 1, the pressure oil in the fluid port P is discharged. Therefore, the first piston 22 and the transmission 15 are lifted by the first panel 24 to release the diameter reduction of the collet 11. Further, the second piston 34, the operation bolt 35 and the pipe 42 are lowered by the second panel 41, whereby the operation part 43 moves the support rod 8 down against the advance panel 45. Let me do it.

[0021] In the released state, the workpiece W is carried in the horizontal direction above the push bolt 9. Thereafter, pressure oil from a hydraulic source (not shown) is supplied to the fluid port P. Then, the pressure oil is gently supplied to the second working chamber 36 through the throttle path 51. As a result, the second piston 34, the operating bolt 35, and the pipe 42 rise gently against the second panel 41, and at the same time the pipe 42 rises, the support panel 45 supports the support. The rod 8 rises and the push bolt 9 contacts the workpiece W (see the two-dot chain diagram in the figure). In this state, a contact gap is formed in the vertical direction between the lower surface of the operation portion 43 and the operated portion 8a of the support rod 8.

[0022] Simultaneously with the above operation, the pressure oil in the second working chamber 36 is gently supplied to the first working chamber 23 through the another throttle path 52, and the first working chamber 23 When the pressure rises sufficiently, the transmission 15 moves downward due to the differential force in the vertical direction of the oil pressure acting on the first piston 22 from the first working chamber 23, and the taper of the transmission 15 is increased. The inner peripheral surface 16 smoothly engages the tapered outer peripheral surface 12 of the collet 11 while rolling the ball 18, and the collet 11 is reduced in diameter. As a result, the collet 11 whose diameter has been reduced presses the holding and fixing region R of the support rod 8 in the centripetal direction, thereby holding and fixing the support rod 8. In the locked state, the upper surface of the workpiece W is mechanically checked, and the pressing force at the time of machining is strongly received in the axial direction by the support force of the support rod 8. [0023] After the machining is completed, the pressure oil in the fluid port P is discharged to an external oil tank (not shown).

Then, first, the pressure oil in the second working chamber 36 and the first working chamber 23 is discharged to the fluid port P through the throttle path 51. Next, the first panel 24 presses the first piston 22 and the transmission 15 upward, and the tapered inner peripheral surface 16 of the transmission 15 moves smoothly upward while rolling the ball 18. Then, the pressed state of the tapered outer peripheral surface 12 of the collet 11 is released. As a result, the collet 11 is expanded in diameter by its own elastic restoring force, and the support rod 8 is unlocked. At the same time, the second panel 41 lowers the second piston 34, and the operating portion 43 drives the support rod 8 downward.

The above embodiment can be modified as follows.

The throttle member 48 may be fixedly attached to the throttle chamber 47 instead of being detachably attached to the throttle chamber 47.

The throttle path 51 or another throttle path 52 may be a groove provided in the throttle member 48 instead of the illustrated through hole.

The second throttle chamber 52 may be omitted, and the second working chamber 36 may be directly communicated with the communication passage 37.

[0025] Means for advancing the support rod 8 upward may be an elastic body such as rubber or may be compressed air or the like instead of the illustrated advance panel 45. Further, the means for retracting the second piston 34 downward may be an elastic body such as rubber, or may be compressed air, instead of the illustrated second panel 41.

The intermediate member 18 may be constituted by a cylindrical member having a low friction function instead of the illustrated many balls.

The present invention can be applied to a single support having another structure instead of being applied to the work support having the illustrated structure.

For example, the first working chamber 23 and the second working chamber 36 may be arranged in parallel instead of the illustrated serial arrangement. Further, instead of the taper transmission mechanism using the collet 11 described above, an annular hydraulic working chamber is formed on the outer periphery of the thin sleeve, and the thin sleeve is hydraulically operated. It may be a mechanism that locks the support rod etc. by reducing the diameter by force.

Further, the housing 3 may be mounted in a casing fixed to the work pallet or the like instead of being directly mounted on the illustrated work pallet 1.

The working fluid may be a gas such as compressed air instead of the liquid such as the illustrated pressure oil.

Claims

The scope of the claims

[1] A housing (3) to be mounted in the receiving hole (la) of the fixed block (1), a support rod (8) inserted into the housing (3) so as to be movable back and forth in the axial direction, and the support rod A first working chamber (23) to which pressure fluid is supplied so as to lock (8) and a second working chamber to which pressure fluid is supplied so that the support rod (8) can advance in the axial direction. (36), and in the bottom of the housing (3), the second working chamber (36) and the throttle chamber (47) are sequentially arranged in the bottom direction,

A throttle member (48) having a throttle path (51) is attached to the throttle chamber (47),

The second working chamber (36) is configured to be able to communicate with the fluid port (P) provided in the bottom wall (lb) of the accommodation hole (la) through the throttle path (51).

Work support characterized by that.

[2] The work support according to claim 1, wherein the throttle member is placed in the throttle chamber (47).

Work support characterized by (48) being detachably mounted.

[3] In the work support described in claim 1 or 2,

The second working chamber (36) is communicated with the first working chamber (23) through another throttle path (52) provided in the throttle member (48). Work support.

[4] In the work support described in claim 1 or 2,

Collet (11) fitted on the support rod (8), transmission tool (15) fitted on the collet (11) with a taper gap (17), and intermediate inserted in the taper gap (17) The member (18), the first piston (22) for reducing the diameter of the collet (11) through the transmission device (15) and the intermediate member (18), and the first piston (22) are driven. The first working chamber (23) to which the pressure fluid to be supplied is supplied, the second piston (34) disposed so that the support rod (8) can advance and retract in the axial direction, and the second piston The second working chamber (36) supplied with pressure fluid for driving (34),

Work support characterized by that.