WO2019220736A1

WO2019220736A1 - Support

Info

Publication number: WO2019220736A1
Application number: PCT/JP2019/007199
Authority: WO
Inventors: 慶太栗原; 橋本　錦児
Original assignee: Dmg森精機株式会社
Priority date: 2018-05-16
Filing date: 2019-02-26
Publication date: 2019-11-21
Also published as: JP2019198921A; DE112019002480T5; JP6539763B1

Abstract

This support (10) comprises: a hollow housing (11) which has a tubular shape having an opening at one end and a fixed part (16) at the other end; a support shaft (25) which is fitted into the hollow in the housing (11) so as to be movable along an axis thereof; and a biasing mechanism which is provided in the hollow in the housing (11) and biases the support shaft (25) towards the one end of the housing (11). The housing (11) includes a tubular space (22), which is formed along the inner circumferential surface of said housing (11), in a thick portion between the inner circumferential surface and the outer circumferential surface. The space (22) is filled with an operating fluid, and the housing (11) is further provided with a pressurising mechanism for pressurising the operating fluid in the space (22). By the operating fluid being pressurised by the pressurising mechanism, a portion of the housing (11) closer to the inner circumferential surface than the space (22) elastically deforms towards the centre to grip the support shaft (25).

Description

Support

The present invention relates to a support for appropriately supporting an object to be supported on a base.

Conventionally, a hydraulic work support device for machine tools disclosed in the following Japanese Patent Application Laid-Open No. 11-347867 (Patent Document 1) has been known as one of the above-mentioned supports. The hydraulic work support device includes a support body, and a collet having a plug body portion that closes the bottom opening of the cylinder cylinder body is attached to the cylinder body of the support body, and the collet is floated by a biasing force of a spring. The lower part of the support rod is fitted.

A cylinder body is provided with a slide body that is externally fitted to the collet and tightens or loosens the collet with respect to the support rod, and a clamp spring that biases the slide body in a direction to narrow the collet. A hydraulic working chamber that is fitted to the upper part of the cylinder body and that applies hydraulic pressure to the slide body is formed below the slide body so as to release the collet constriction, and a supply port that supplies hydraulic pressure to the hydraulic working chamber at the time of unclamping Provided on the support body.

According to the conventional hydraulic work support apparatus having such a configuration, the slide body is configured to clamp the support rod to the support body by the clamp spring, and the hydraulic pressure supplied to the hydraulic operation chamber by unclamping the support rod. Therefore, the support rod is not inadvertently unclamped due to a hydraulic trouble as in the prior art, and the cutting accuracy can be reliably achieved.

Further, in this hydraulic work support device, the hydraulic pressure is only used when the support body is unclamped, and is not required during cutting. Therefore, the hydraulic pressure can be removed by a one-touch joint, and hydraulic piping or Since there is no need to lay a hydraulic hose, there is an effect that the chip is not damaged, and there is no need to perform the removal work of the chip. Further, the one-touch joint allows the hydraulic hose and the supply port to be connected. It can be easily detached and attached, so that the workability due to unclamping is not reduced.

Japanese Patent Laid-Open No. 11-347867

However, in the above-described conventional hydraulic work support device, when the support rod is unclamped, a hydraulic hose is connected to the supply port leading to the hydraulic working chamber via a one-touch joint, and then pressure oil is supplied from the hydraulic source to the hydraulic working chamber. It is necessary to supply, and at the time of clamping, it is necessary to operate the switching valve and the like to return the pressure oil in the hydraulic operation chamber to the hydraulic power source. And the problem that the operation of the clamp takes a long time still remained.

Further, in this hydraulic work support device, the slide body is urged downward by the clamp spring, and the support rod is clamped by moving the slide body downward by this urging force. The support rod is urged downward by the behavior of the clamp spring, such as when the spring slides against the support rod, and the upper end surface (support surface) of the support rod moves away from the workpiece during clamping, that is, the support rod supports the workpiece. There was a risk of not being in a state. Thus, when a gap is generated between the upper end surface of the support rod and the workpiece in this way, there is a problem that clamping distortion occurs when the workpiece is properly clamped using a clamping jig.

The present invention has been made in view of the above circumstances, and it is unnecessary to supply pressure oil using a hydraulic hose as in the prior art, and further, it is possible to provide a support that can reliably support an object to be supported. Is the purpose.

The present invention for solving the above problem is a support tool for supporting the supported object on a base on which the supported object is placed,
A hollow cylindrical housing having an opening at one end and a fixing portion for fixing the other end on the base at the other end;
A support shaft that is movably inserted along the axis of the hollow portion of the housing;
A biasing mechanism that is provided in the hollow portion of the housing and biases the support shaft toward the one end side of the housing;
The housing has a cylindrical space formed along an inner peripheral surface thereof in a thick portion between the inner peripheral surface and the outer peripheral surface, and a working liquid is sealed in the space. The housing is provided with a pressurizing mechanism for pressurizing the working liquid in the space,
The housing is configured such that when the working liquid is pressurized by the pressurizing mechanism, a portion on the inner peripheral surface side from the space is elastically deformed toward the center side to grip the support shaft. Related to ingredients.

The support of this aspect (first aspect) is used to support the object to be supported on the base as appropriate. In general, a plurality of the supports are appropriately disposed on the base, and the other of the housings A supported object is placed on each of the support shafts with the end fixed on the base. At that time, pressurization of the working liquid by the pressurizing mechanism is released.

When the supported object is placed, each support shaft receives a load acting due to the gravity of the supported object and moves downward, and the urging force of each urging mechanism and the load caused by the gravity of the supported object are generated. It stops at the balance, that is, it is in an equilibrium state.

After reaching the equilibrium state in this way, the working liquid sealed in the cylindrical space of each housing is pressurized by a corresponding pressurizing mechanism. As a result, a portion of each housing that is closer to the inner peripheral surface than the space is elastically deformed toward the center, and each support shaft is gripped by such elastic deformation of the housing, and the support shaft is fixed to the housing. On the other hand, by releasing the pressurization of the working liquid by the pressurizing mechanism, the holding and fixing of the support shaft by the housing are released.

Thus, according to the support of the first aspect, the support shaft can be fixed to the housing by pressurizing the working liquid sealed in the cylindrical space of the housing with the pressurizing mechanism. As is conventional, there is no need to supply pressure oil using a hydraulic hose connected to a hydraulic power source, and the operation is simpler than in the past. For this reason, the support shaft is fixed (clamped) and released (clamped). Unclamping) can be performed in a short time.

Further, in this support tool, the support shaft is gripped by elastically deforming the portion on the inner peripheral surface side from the space of the housing toward the center, and the support shaft is fixed to the housing. A force that moves in the axial direction does not act on the support shaft. For this reason, the support shaft can be fixed in a state where the support shaft is securely in contact with the supported object, and when the supported object is clamped appropriately using a clamp jig, clamping distortion occurs in the supported object. Can be prevented.

In the support according to the first aspect of the present invention,
The housing has a hollow outer cylindrical member having an opening at one end and a fixing portion for fixing the other end on the base at the other end, and both ends open, and the outer cylinder A hollow inner cylinder member fixed to the outer cylinder member in a state of being inserted into the hollow portion of the member,
The support shaft is inserted into the hollow portion of the inner cylinder member so as to be movable along the axis thereof,
The urging mechanism is provided in a hollow portion of the outer cylinder member,
The inner cylinder member has a cylindrical space formed along the inner peripheral surface in a thick portion between the inner peripheral surface and the outer peripheral surface, and the working liquid is sealed in the space. The inner cylinder member is provided with a pressurizing mechanism for pressurizing the working liquid in the space.
The inner cylinder member is configured such that when the working liquid is pressurized by the pressurizing mechanism, a portion on the inner peripheral surface side from the space is elastically deformed toward a center side to grip the support shaft. May be.

According to the support of this aspect (second aspect), the working liquid sealed in the space of the inner cylinder member is pressurized by the pressurizing mechanism, so that the portion on the inner peripheral surface side from the space becomes the center side. The support shaft is gripped and fixed to the inner cylinder member by elastic deformation.

In the support device according to the second aspect, the inner cylinder member is elastically deformed outwardly from the space when the working liquid is pressurized by the pressurizing mechanism. And it is preferable that it is comprised so that it may press-contact with the internal peripheral surface of the said outer cylinder member.

According to the support of this aspect (third aspect), the inner cylinder member is pressed against the outer cylinder member by pressurizing the working liquid by the pressurizing mechanism, so that the support shaft can be more reliably connected to the inner cylinder member and It can fix to the housing comprised from an outer cylinder member.

Further, in the support device according to the second or third aspect, the inner cylinder member has a flange portion at an end opposite to the side inserted into the hollow portion of the outer cylinder member, and the flange portion May be configured to be fixed to the outer cylinder member in contact with the end of the outer cylinder member.

According to the support of this aspect (fourth aspect), since the inner cylinder member and the outer cylinder member can be integrally connected to each other, the support shaft is securely fixed to the housing. can do.

In the support device of the first aspect, it is preferable that the hollow portion of the housing is a blind hole in which the other end side is sealed.

According to the support of this aspect (fifth aspect), air is sealed in the hollow portion of the housing, the load of the supported object acts on the support shaft, and this support shaft is in its axis. By moving along, the internal pressure in the hollow portion increases. Thus, when the internal pressure in the hollow portion is increased in this way, foreign matter (for example, chips) is caught in the sliding contact portion between the inner peripheral surface of the hollow portion of the housing and the outer peripheral surface of the support shaft, or the foreign matter enters the hollow portion. Is prevented from entering, and normal axial movement of the support shaft is guaranteed.

Also, in the support according to any one of the second to fourth aspects, it is preferable that the hollow portion of the outer cylinder member is a blind hole sealed on the other end side.

Even with the support of this aspect (sixth aspect), air is sealed in the hollow portion of the inner cylindrical member constituting the housing, and the load of the supported object acts on the support shaft. As the shaft moves along the axis, the internal pressure in the hollow portion increases. Thus, even with the support of the sixth aspect, foreign matter can be caught in the sliding contact portion between the inner peripheral surface of the hollow portion of the inner cylinder member and the outer peripheral surface of the support shaft, or the foreign matter can enter the hollow portion. Is prevented and normal axial movement of the support shaft is assured.

Further, in the support device according to the first or fifth aspect, when the support shaft is gripped by the housing, the entire gripping region corresponding to the space in the inner peripheral surface of the housing is the support shaft. It is preferable that it is comprised so that it may contact | abut with the outer peripheral surface.

According to the support tool of this aspect (seventh aspect), the support shaft can be gripped by the entire gripping region of the housing, so that the support shaft can be gripped and fixed using the set maximum gripping ability. And the support shaft can be securely gripped and fixed.

Further, in the support device according to the second, third, fourth, or sixth aspect, when the support shaft is gripped by the inner cylinder member, the grip corresponding to the space in the inner peripheral surface of the inner cylinder member. It is preferable that the entire region is configured to come into contact with the outer peripheral surface of the support shaft.

Similarly, the support shaft can be gripped by the entire gripping region of the inner cylinder member by the support tool of this aspect (eighth aspect), so that the support shaft can be gripped and fixed using the set maximum gripping ability. Thus, the support shaft can be securely gripped and fixed.

Further, in the support device according to any one of the first to eighth aspects, the pressurizing mechanism includes a pressing unit that presses the working fluid in the space, and a driving signal received from the outside to receive the pressing unit. It is preferable that the driving unit is configured to be driven.

According to the support of this aspect (the ninth aspect), by transmitting a driving signal from the outside, the driving part that has received the driving signal drives the pressing part, and the working liquid sealed in each space is supplied. The supporting shaft can be fixed by applying pressure. Thus, according to the support tool of the ninth aspect, the support shaft can be automatically fixed.

As described above, according to the support device according to the present invention, the support shaft can be fixed to the housing by pressurizing the working liquid sealed in the cylindrical space of the housing with the pressurizing mechanism. As is conventional, there is no need to supply pressure oil using a hydraulic hose connected to a hydraulic pressure source, and the operation is simpler than in the past. For this reason, the support shaft can be fixed (clamped) and released (unclamped) in a short time.

It is a front view which shows the state which supported and fixed the workpiece | work on the table using the support tool which concerns on one Embodiment of this invention. It is the front sectional view showing the support concerning this embodiment. FIG. 2 is a plan sectional view in the direction of arrow AA in FIG. 1. It is the front sectional view which showed the support tool which concerns on other embodiment of this invention. It is a front sectional view showing a support according to still another embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the support tool 10 of this example is used to support a work W when the work W is fixed by a clamp jig 1 on a table T of a machine tool, for example.

First, a schematic configuration of the clamp jig 1 illustrated in FIG. 1 will be described. The clamp jig 1 is screwed onto the table T in a state of passing through the clamp bar 2 and a clamp bar 2 for clamping the workpiece W between one end thereof and the support 10. The clamp bolt 3 includes a nut 4 screwed to the upper end portion of the clamp bolt 3, and an adjustment bolt 6 and a support column 5 that support the other end portion of the clamp bar 2 from below.

The adjustment bolt 6 that supports the clamp bar 2 is screwed to a column 5 that is erected on the table T, and the position at which the clamp bar 2 is supported is adjusted by adjusting the screwing position of the adjustment bolt 6. can do.

Thus, in this clamping jig 1, after the workpiece W is supported by the support 10, the nut 4 is tightened and the clamp bar 2 is pushed downward, whereby the workpiece W is clamped to the clamp bar 2 and the support 10. Clamped between.

Next, details of the support 10 of this example will be described. As shown in FIGS. 2 and 3, the support 10 of this example includes a housing 11, a support shaft 25, a spring body (compression coil spring) 28 as an urging mechanism, a pressurizing mechanism 30 provided in the housing 11, and the like. Consists of

The housing 11 is composed of a hollow outer cylinder 12 whose upper end and lower end are open, and an outer cylinder member which is fixed to the lower end of the outer cylinder 12 by a flat plate screw 17 so as to close the lower end opening. Similarly, both ends are open, and a hollow inner cylinder 20 (inner cylinder member) is fixed to the outer cylinder 12 in a state of being fitted into the hollow portion of the outer cylinder 12.

The outer cylinder 12 has a hollow portion having a large-diameter portion 13, a medium-diameter portion 14 and a small-diameter portion 15 which are formed in order from the upper side to the lower side. The fixing plate 16 has bolt holes 18 at four corners.

The inner cylinder 20 is fitted into the large-diameter portion 13 of the outer cylinder 12, and includes a flange portion 21 at the end opposite to the side inserted into the outer cylinder 12. The outer cylinder 12 is fixed to the outer cylinder 12 with a mounting bolt (not shown) in contact with the upper end surface of the outer cylinder 12. In addition, the inner cylinder 20 includes a cylindrical space 22 formed along the hollow inner peripheral surface 23 in a thick portion between the inner peripheral surface and the outer peripheral surface. Is filled with hydraulic oil.

The spring body 28 is disposed in the hollow portion of the outer cylinder 12 in a state of being inserted into the small diameter portion 15 of the outer cylinder 12. The support shaft 25 is fitted into the hollow portion of the inner cylinder 20. The support shaft 25 is in a state in which a projecting portion 25 a formed at a lower end portion thereof is inserted into the spring body 28, and an end surface of the lower end portion is in contact with the spring body 28. Thus, the support shaft 25 moves downward by receiving an external force directed downward, and is urged upward by the drag of the spring body 28 generated by the movement.

As shown in FIG. 2, the hollow portion of the outer cylinder 12 into which the inner cylinder 20 is inserted is in a blind hole state. Therefore, in the state where the support shaft 25 is inserted into the hollow portion of the inner cylinder 20, The outer peripheral surface of the support shaft 25 and the inner peripheral surface of the inner cylinder 20 are in sliding contact with each other in an airtight manner. Therefore, when the support shaft 25 moves downward, the internal pressure in the hollow portion of the outer cylinder 12 increases, and as a result, foreign matter such as chips on the sliding contact portion between the inner peripheral surface of the hollow portion of the inner cylinder 20 and the outer peripheral surface of the support shaft 25. Can be prevented from being bitten and foreign matter entering the hollow portion. Further, the support shaft 25 includes a screw hole 25b drilled from the upper end surface so as to be coaxial with the axis thereof, and an adjustment bolt 26 is screwed into the screw hole 25b as shown in FIG. Can be done.

The pressurizing mechanism 30 includes a cylinder chamber 31 formed in the inner cylinder 20 so as to communicate with the space 22, a screw hole 32 formed on the outer side of the cylinder chamber 31 and coaxially therewith, Outside the screw hole 32, there is also provided a storage hole 33 formed coaxially therewith, a piston part 36 fitted in the cylinder chamber 31, and a screw shaft part 37 screwed into the screw hole 32. The pressure shaft 35, a motor 38 that drives the pressure shaft 35, and a control unit 39 that supplies electric power to the motor 38 and controls the operation of the motor 38.

In this example, the central axes of the cylinder chamber 31, the screw hole 32, and the storage hole 33 that are formed coaxially are located in a plane perpendicular to the axis of the inner cylinder 20, and are parallel to the tangential direction of the inner peripheral surface 23. The cylinder chamber 31, the screw hole 32, and the storage hole 33 are formed so as to be, but the present invention is not limited to such a mode.

The control unit 39 includes a battery, receives a driving signal from the outside, supplies power from the battery to the motor 38, and drives it. For example, when the drive signal is a pressurization signal, the control unit 39 drives the motor 38 so that the pressurization shaft 35 moves to the piston unit 36 side. As a result, the hydraulic oil sealed in the cylinder chamber 31 and the space 22 is pressurized by the pressing action of the piston portion 36.

When the hydraulic oil in the space 22 is pressurized in this way, the portion of the inner cylinder 20 closer to the inner peripheral surface than the space 22 is elastically deformed toward the center by the pressurized hydraulic oil, and thus The support shaft 25 is gripped by the inner cylinder 20 by the elastic deformation, and the vertical movement of the support shaft 25 is stopped. Further, the portion on the outer peripheral surface side of the space 22 of the inner cylinder 20 is elastically deformed outward and is pressed against the inner peripheral surface of the outer cylinder 12, whereby the support shaft 25 is separated from the inner cylinder member and the outer cylinder member. The housing 11 is fixed securely.

In this example, the entire gripping region formed by the space 22 of the inner cylinder 20 is configured to abut on the outer peripheral surface of the support shaft 25. Thereby, the support shaft 25 can be gripped using all of the set gripping regions, that is, using the set maximum gripping capability, and the support shaft 25 can be securely gripped and fixed. .

On the other hand, when the drive signal is a release signal, the control unit 39 drives the motor 38 so that the pressure shaft 35 moves to the screw shaft 37 side. As a result, the pressing action of the piston portion 36 is released, and the pressure of the hydraulic oil sealed in the cylinder chamber 31 and the space 22 decreases. As a result, the elastically deformed inner cylinder 20 is restored to its original shape, the gripping of the support shaft 25 by the inner cylinder 20 is released, and the support shaft 25 can be moved in the vertical direction.

According to the present support tool 10 having the above configuration, the work W is supported on the table T of the machine tool as follows, and the work W supported by the support tool 10 is supported by the clamp jig 1. Clamped.

First, in order to stably support the workpiece W on the table T, a plurality of supports 10 are arranged at appropriate positions on the table T, and the fixing bolts are appropriately fixed using the bolt holes 18 of the fixing plate 16. Fix by (not shown). At this time, the pressurizing mechanisms 30 of all the support tools 10 are in a state where the pressurizing shaft 35 is operated to the release side, and the pressure of the hydraulic oil sealed in the cylinder chamber 31 and the space 22 is reduced. It is in the state that was done. That is, the gripping of the support shaft 25 by the inner cylinder 20 is released.

Next, the work W is placed on the arranged support tool 10, and the work W is supported by each support tool 10. When the workpiece W is placed, each support shaft 25 receives a load acting on the gravity of the workpiece W and moves downward, and the urging force of each spring body 28 balances the load caused by the gravity of the workpiece W. Stop and reach equilibrium. In addition, when it is necessary to adjust the posture of the workpiece W to be supported, the adjustment bolt 26 is appropriately rotated in the tightening direction or the extraction direction to adjust the vertical position thereof, and the posture of the workpiece W is adjusted. Adjust.

After reaching the equilibrium state in this way, a pressurizing signal is transmitted to the control unit 39 of each pressurizing mechanism 30, and under the control of the control unit 39, the driving motor 38 is driven to each pressurizing shaft. 35 is moved to the pressurizing side to pressurize the hydraulic oil sealed in the cylinder chamber 31 and the space 22. Thereby, each inner cylinder 20 is elastically deformed, and each support shaft 25 is fixed to the inner cylinder 20, in other words, the housing 11 including the inner cylinder 20.

Then, after fixing the support shaft 25 in this way, the workpiece W is clamped using the clamp jig 1 in cooperation with the support tool 10. The arrangement of the clamp jig 1 may be performed at an appropriate time as appropriate. That is, it may be before or after the support 10 is arranged, or may be after the support shaft 25 is fixed.

Thus, after clamping the workpiece | work W on the table T, in order to remove the said workpiece | work W from a table, first, the clamp by the clamp jig | tool 1 is cancelled | released, Then, the control part 39 of each pressurization mechanism 30 is shown. The hydraulic oil enclosed in the cylinder chamber 31 and the space 22 is transmitted to the cylinder chamber 31 and the space 22 by driving the drive motor 38 under the control of each control unit 39 to move each pressure shaft 35 to the release side. The pressure is reduced. As a result, the elastically deformed inner cylinders 20 are restored to their original shapes, the gripping of the support shafts 25 by the inner cylinders 20 is released, and the support shafts 25 can be moved in the vertical direction. Next, the workpiece W is removed from the support 10.

As described above, according to the support tool 10 of this example, the hydraulic oil sealed in the space 22 of the inner cylinder 20 constituting the housing 11 is pressurized by the pressurizing mechanism 30, whereby the support shaft 25 is moved to the housing 11. Therefore, there is no need to supply pressure oil using a hydraulic hose connected to a hydraulic power source as in the prior art, and the operation is simpler than in the prior art. Can be fixed (clamped) and released (unclamped) in a short time.

Further, in the support 10, the support shaft 25 is gripped and fixed by elastically deforming the inner peripheral surface portion of the inner cylinder 20 from the space 22 toward the center. Therefore, in the operation of fixing the support shaft 25, the force that moves in the axial direction does not act on the support shaft 25. For this reason, the support shaft 25 can be fixed in a state in which the support shaft 25 is securely in contact with the workpiece W, and when the workpiece W is clamped by using the clamp jig 1, a clamp distortion occurs in the workpiece W. Can be prevented.

Further, the portion on the outer peripheral surface side of the space 22 of the inner cylinder 20 is elastically deformed outward and is pressed against the inner peripheral surface of the outer cylinder 12, whereby the inner cylinder 20 and the outer cylinder 12 are integrated with each other. Therefore, the support shaft 25 can be reliably fixed by the housing 11 including the inner cylinder 20 and the outer cylinder 12.

Further, the hollow portion of the outer cylinder 12 into which the inner cylinder 20 is inserted is in a blind hole state, and in the state where the support shaft 25 is inserted into the hollow portion of the inner cylinder 20, The cylinder 20 is in a state of being in sliding contact with the inner peripheral surface of the cylinder 20. For this reason, when the support shaft 25 moves downward, the internal pressure in the hollow portion of the outer cylinder 12 increases, whereby foreign matter bites the sliding contact portion between the hollow portion inner peripheral surface of the inner tube 20 and the outer peripheral surface of the support shaft 25. And foreign matter can be prevented from entering the hollow portion. Thus, by such an action, the normal movement of the support shaft 25 is ensured, and the workpiece W can be supported appropriately.

On the other hand, the support shaft 25 can be pulled out upward in the axial direction, and if the foreign matter bites into the sliding contact portion or the foreign matter enters the hollow portion, the support shaft 25 is pulled out. This makes it possible to easily remove the foreign matter that has been caught, and to clean the inside of the hollow portion.

Further, in the support tool 10 of this example, the support shaft 25 can be automatically fixed and released in each support tool 10 by transmitting a drive signal from the outside. No special work is required for this purpose. In this sense, the support shaft 25 can be fixed and released in a short time. Further, even when the support tool 10 is disposed at a position where it is difficult or impossible to manually operate, the support shaft 25 of the support tool 10 is easily operated by an external operation. be able to.

The specific embodiments of the present invention have been described above, but the specific modes that the present invention can take are not limited thereto.

For example, in the above example, using the bolt holes 18 formed in the fixing plate 16, the support 10 is appropriately fixed on the table T with fixing bolts. However, the present invention is not limited to this, and is shown in FIG. Thus, it is good also as support 10 'provided with fixing board 16' which has the screw shaft 19 in a lower surface. According to this support 10 ′, it is fixed on the table T by the screw shaft 19.

In the above example, the outer cylinder 12 and the inner cylinder 20 constituting the housing 11 are separate structures, but the present invention is not limited to this, and as shown in FIG. It is good also as the support tool 10 "provided with the housing 11" comprised from the cylindrical member 12 "integrally formed. This housing 11" was formed along the internal peripheral surface 13 "of the hollow part. A cylindrical space 22 ″ is provided in a thick portion between the inner peripheral surface and the outer peripheral surface, and hydraulic oil is enclosed in the space 22 ″. Further, the cylinder chamber 31 of the pressurizing mechanism 30 includes a cylinder chamber 31. It communicates with the space 22 ″. The position in the thickness direction where the space 22 ″ is provided is such that when the hydraulic oil sealed in the space 22 ′ is pressurized by the pressurizing mechanism 30, the portion on the inner peripheral surface side of the space 22 ″ is on the center side. It is set at a position where it can be elastically deformed, and the support shaft 25 is gripped by such elastic deformation.

Further, the outer cylinder 12 and the fixing plate 16 in FIG. 2 may be integrally formed, and the outer cylinder 12 and the fixing plate 16 ′ in FIG. 4 may be integrally formed. 5 may be integrally formed with the fixing plate 16. In addition, in the support 10 "shown in FIG. 5, the fixing plate 16 'shown in FIG. May be applied.

In the above example, the pressure shaft 35 is rotated by the motor 38 under the control of the control unit 39. However, the present invention is not limited to this, and the pressure shaft 35 may be manually rotated. good.

Again, the above description of the embodiment is illustrative in all respects and not restrictive. Modifications and changes can be made as appropriate by those skilled in the art. The scope of the present invention is shown not by the above embodiments but by the claims. Furthermore, the scope of the present invention includes modifications from the embodiments within the scope equivalent to the claims.

DESCRIPTION OF SYMBOLS 1 Clamp jig 10 Support tool 11 Housing 12 Outer cylinder 16 Fixing plate 20 Inner cylinder 22 Space 25 Support shaft 28 Spring body 30 Pressurization mechanism 31 Cylinder chamber 35 Pressurization shaft 36 Piston part 37 Screw shaft part 38 Motor 39 Control part

Claims

On a base on which the supported object is placed, a support tool for supporting the supported object,
A hollow cylindrical housing having an opening at one end and a fixing portion for fixing the other end on the base at the other end;
A support shaft that is movably inserted along the axis of the hollow portion of the housing;
A biasing mechanism that is provided in the hollow portion of the housing and biases the support shaft toward the one end side of the housing;
The housing has a cylindrical space formed along an inner peripheral surface thereof in a thick portion between the inner peripheral surface and the outer peripheral surface, and a working liquid is sealed in the space. The housing is provided with a pressurizing mechanism for pressurizing the working liquid in the space,
The housing is configured such that when the working liquid is pressurized by the pressurizing mechanism, a portion on the inner peripheral surface side from the space is elastically deformed toward a center side to grip the support shaft. A support device characterized by that.
The housing has a hollow outer cylindrical member having an opening at one end and a fixing portion for fixing the other end on the base at the other end, and both ends open, and the outer cylinder A hollow inner cylinder member fixed to the outer cylinder member in a state of being inserted into the hollow portion of the member,
The support shaft is inserted into the hollow portion of the inner cylinder member so as to be movable along the axis thereof,
The urging mechanism is provided in a hollow portion of the outer cylinder member,
The inner cylinder member has a cylindrical space formed along the inner peripheral surface in a thick portion between the inner peripheral surface and the outer peripheral surface, and the working liquid is sealed in the space. The inner cylinder member is provided with a pressurizing mechanism for pressurizing the working liquid in the space.
The inner cylinder member is configured such that when the working liquid is pressurized by the pressurizing mechanism, a portion on the inner peripheral surface side from the space is elastically deformed toward a center side to grip the support shaft. The support according to claim 1, wherein
When the working liquid is pressurized by the pressurizing mechanism, the inner cylinder member is elastically deformed outwardly from the space and is pressed against the inner circumferential surface of the outer cylinder member. The support according to claim 2, wherein the support is configured as described above.
The inner cylinder member has a flange portion at the end opposite to the side inserted into the hollow portion of the outer cylinder member, and the flange portion is in contact with the end portion of the outer cylinder member. The support according to claim 2 or 3, wherein the support is fixed to the outer cylinder member.
The support according to claim 1, wherein the hollow portion of the housing is a blind hole sealed on the other end side.
The support according to any one of claims 2 to 4, wherein the hollow portion of the outer cylinder member is a blind hole in which the other end side is sealed.
When the support shaft is gripped by the housing, the entire grip region corresponding to the space is in contact with the outer peripheral surface of the support shaft among the inner peripheral surface of the housing. The support according to claim 1 or 5.
When the support shaft is gripped by the inner cylindrical member, the entire gripping region corresponding to the space is in contact with the outer peripheral surface of the support shaft among the inner peripheral surface of the inner cylindrical member. The support according to claim 2, 3, 4, or 6.
2. The pressurizing mechanism includes a pressing portion that presses the working fluid in the space, and a driving portion that receives an external driving signal and drives the pressing portion. The support in any one of thru | or 8.