CN206982734U

CN206982734U - The more changing device of work holding fixture.In

Info

Publication number: CN206982734U
Application number: CN201720659947.2U
Authority: CN
Inventors: 阿部贤
Original assignee: Aida Engineering Ltd
Current assignee: Aida Engineering Ltd
Priority date: 2016-06-09
Filing date: 2017-06-08
Publication date: 2018-02-09
Anticipated expiration: 2027-06-08
Also published as: DE202017103442U1; JP2017217681A; JP6339130B2

Abstract

A kind of more changing device of work holding fixture.In,Multiple gas pipes are connected or dismantle while being installed or removed with pedestal,Including keeper (12) and pedestal (13),Keeper (12) has in the hole with the end (14) of the preceding surface opening of keeper,Pedestal (13) has insertion section (15),Insertion section (15) is embedded in the hole of keeper in a manner of being rotated freely in the insertion position that can be installed and between the fixed position of limitation axial movement,A plurality of gas source path is offered in the bottom surface (14a) in the hole of keeper (12),Insertion section terminal surface formed with the gas receiving path in fixed position and gas source communication,The pod (24) that the rotating operation of pedestal (13) is converted to the push operation to base portion side is provided with the outer peripheral face of the insertion section (15) of pedestal (13) in the inner peripheral surface of the hole of keeper (12) (14),Translot (25),Projection (26).

Description

The more changing device of work holding fixture.In

Technical field

It the utility model is related to the work holding fixture.In of the robot of conveying workpieces between the mould of press more Changing device.

Background technology

Patent Document 1 discloses a kind of absorption of workpieces clamp-replacing device, and it will be fixed on the workpiece of press Absorption is detachably installed on the keeper located at the preceding surface of feed bar with the pedestal of the base portion of fixture.In the apparatus, If pedestal is installed on into keeper, the vacuum loop of absorption of workpieces is also concatenated simultaneously.Moreover, after installation pedestal, Make to be installed on the cylinder operation in keeper, the side of pedestal is pressed on to the side of the inner side of keeper, to being folded in both Between o-ring assign sealing pressure, and pedestal is fixed.In Fig. 5 of patent document 1, as prior art, record Utilize the more changing device for pressing bolt by pedestal and laterally pressing on keeper.

Prior art literature

Patent document

Patent document 1：Japanese Unexamined Patent Publication 08-1260 publications

Utility model content

In above-mentioned existing more changing device, the gas pipe (vacuum loop) that can be connected only has one.Therefore, more It is changed in the case of the workpiece gripping fixture using cylinder opening and closing, it is necessary to which vacuum loop is replaced by into compressed air loop, switched back into Road, it is relatively complicated to change production adjustment.In addition, even if wanting to increase gas pipe, also because of the side of pedestal, the side of the inner side of keeper The narrower width in face and it is more difficult.

Moreover, it is necessary to make pistons work using air pressure or hydraulic pressure, in order to firmly fix needs in existing device Larger piston is set to, or needs larger air pressure, hydraulic pressure.Therefore, device is complicated and is not having advantage in price.The opposing party Face, in the device using pressing bolt, although simple structure and favourable in price, the instruments such as spanner are needed to use to carry out Operation.

Technical task of the present utility model is, the problem of eliminating above-mentioned conventional device, there is provided one kind can be with pedestal Installation or removal simultaneously carry out holder used in multiple gas pipes connection or dismounting work holding fixture.In More changing device.

The more changing device of work holding fixture.In of the present utility model, in work transfer device, it is characterised in that described The more changing device of work holding fixture.In includes keeper and pedestal, and the keeper is fixed on the feed bar of work transfer device, And have and be located at the base portion of work holding fixture.In in the hole with the end of the preceding surface opening of the keeper, the pedestal, and have Have an insertion section, the insertion section with the insertion position that can be installed and rotated between the fixed position of limitation axial movement from Mode be embedded in as described in keeper hole, a plurality of gas connected with gas source is offered in the bottom surface in the hole of the keeper Body source path, the insertion section of the pedestal terminal surface formed with gas receiving path, the gas receiving path is with keeping Part links and at least in the fixed position and the gas source communication, the hole of the keeper inner peripheral surface and The outer peripheral face of the insertion section of pedestal is provided with switching mechanism, and the switching mechanism turns pedestal from insertion position to fixed position It is dynamic to operate the operation being pressed into base portion side for being converted to pedestal.In such more changing device, preferably above-mentioned gas source leads to Road possesses vacuum negative pressure passage and compressed gas path.

It is further preferred, that the switching mechanism includes：Located at the inner peripheral surface in the hole of keeper and the cylindrical portion of pedestal The projection or groove of one of outer peripheral face；And groove or projection located at another one.It is further preferred, that above-mentioned switching mechanism Also it is also used as snap fastener, the snap fastener is engaged pedestal into not falling off by the rotation of pedestal.

Preferably, on the inner peripheral surface in the hole of above-mentioned keeper, multiple projections are protruded towards radial direction inner side, On the outer peripheral face of the pedestal formed with：The a plurality of pod passed through for projection in the direction of insertion of pedestal；And exist for projection At least one translot engaged in the rotation direction of pedestal by and inwall with the terminal part of projection, the switching mechanism It is configured to, the terminal part of projection is jumped onto side wall and the engaging of translot by the rotation of pedestal, and jumped onto by this by pedestal pressure Enter base portion side.

Further it is preferred that in any one above-mentioned more changing device, the keeper is additionally provided with fixed position Limit the rotation of pedestal or release the locking member of the limitation.

In more changing device of the present utility model, in the bottom surface of keeper and the end of the insertion section of the pedestal abutted with the face End face offers multiple gas source paths and gas receiving path.These bottom surfaces, terminal surface can widen area.Therefore, will Multiple, the gas source path of particularly more than three or more than five groups and the combination of gas receiving path are set to will not be mutual Interference is relatively easy.

In addition, only rotate pedestal by using snap fastener, it becomes possible to by pedestal be fixed on keeper and link or release Gas source path.It therefore, there is no need to the mechanisms such as cylinder, hydraulic cylinder.Moreover, although pedestal is fixed on suction jig, grips fixture , just being capable of more easily rotating base but as long as gripping these fixtures (or bracket of fixture) Deng the base portion of fixture.Therefore, it is possible to The replacing of fixture is carried out by the seat of one's pants.

Be additionally, since and be provided with a plurality of gas source path, thus can according to the workpiece of absorption, switch stronger absorption with compared with The intensity for the power that weak absorption or switching grips.In addition, can also make two kinds of adsorption operations different at the time of or two kinds grip Operation element.Moreover, the reversion for the finger that can also carry out gripping and being gripped or the action gripped with two ranks. In addition, in the case where above-mentioned gas source path possesses vacuum negative pressure passage and compressed gas path, can according to workpiece and Selection absorption and gripping.Moreover, it can also make absorption with gripping while working.

In above-mentioned switching mechanism by a certain in the inner peripheral surface in the hole of keeper and the outer peripheral face of the cylindrical portion of pedestal In the case that the projection of side and groove located at the opposing party or projection are formed, can be suitably designed the projection of a side with it is another Shape, the inclined angle of the groove of side or the abutting part of projection.Thereby, it is possible to by relative to suction jig, grip fixture The power of the press-in of rotation is located at desired scope.In addition, it can also be designed to the power of press-in can be adjusted.At above-mentioned turn Converting mechanism double as by the rotation of pedestal by pedestal engaging be without departing from snap fastener in the case of, turn without setting respectively Converting mechanism and snap fastener, can compactly it design.

On the inner peripheral surface in the hole of above-mentioned keeper, multiple projections are protruded towards radial direction inner side, in said base Outer peripheral face on, turn formed with a plurality of pod passed through in the direction of insertion of pedestal for projection, and for projection in pedestal Upwardly through and at least one translot that engage with the terminal part of projection of inwall, above-mentioned switching mechanism is configured to, logical for dynamic side Crossing the rotation of pedestal makes the terminal part of projection jump onto the side wall of translot, and is jumped onto by this pedestal being pressed into base portion side, above-mentioned In the case of, it can be balanced with multiple projections and preferably be pressed into pedestal.Therefore, the link of gas source path and gas receiving path, Sealing becomes easy.

In above-mentioned more changing device, in the case of the locking member for the rotation that limitation/releasing pedestal is provided with keeper, lead to Cross and pedestal is limited to fixed position, so as to which security improves.

Brief description of the drawings

Fig. 1 is the state before the keeper in the embodiment for represent more changing device of the present utility model is combined with pedestal Stereogram.

Fig. 2 be represent Fig. 1 more changing device combine after state top view.

Fig. 3 is Fig. 2 III-III line sectional views.

Fig. 4 (a) is Fig. 3 IV-IV line sectional views, and Fig. 4 (b) is Fig. 4 (a) line B-B sectional view, Fig. 4's (c) be Fig. 4 (a) C direction views, Fig. 4 (d) be represent positioned at insertion position pedestal front end face front view.

Fig. 5 (a) and Fig. 5 (b) is that the groove of the pedestal of the more changing device for representing Fig. 1 and the pin of keeper are matched somebody with somebody respectively The major part top view of conjunction relation, Fig. 5 (c) is their enlarged view of the main part.

Fig. 6 is Fig. 3 line VI -- VI sectional view.

Fig. 7 is the side view of the effect of the securing rod for the more changing device for representing Fig. 1.

Fig. 8 is the approximate three-dimensional map for the other embodiment for representing more changing device of the present utility model.

Description of reference numerals

10 more changing devices；11 feed bars；12 keepers；13 pedestals；13a screwed holes；13b main parts；13c cut surfaces；14 Hole；14a bottom surfaces；15 insertion sections；15a terminal surfaces；16 main bodys；17 plates；17a bolts；18a~18e gas source paths；19 screw threads connect Pipe；ST limiters；SW vacuum detection switchs；20T shape pipe joints；21a~21e gas receiving paths；22 recesses；23O type rings；24 Pod；25 translots；25a walls；26 projections；27 guide members；28 installing plates；29 axles；29a cam pins；30 elongated holes；31 screws； 33 breach；34 securing rods；34a sells；35 locking plates；36 recesses；37 internal thread holes；38 bulb plungers；39 balls；40 engagings are recessed Portion；42 grooves of the notch；43 guiding grooves；44 parallel surfaces；BR brackets.

Embodiment

More changing device 10 shown in Fig. 1 is by being fixed on the keeper 12 of feed bar 11 and being detachably installed on the holding The pedestal 13 of part is formed.Pedestal be fixed on suction jig, grip fixture bracket BR rear end, according to the material of workpiece, shape The fixture of appropriate form is replaced by together with pedestal 13.The upper and lower screwed hole 13a on the preceding surface of pedestal 13 is used for fixed hold in the palm Frame BR.On the preceding surface of keeper 12 formed with the cylindric hole 14 with bottom surface, it is provided with pedestal 13 with detachable, simultaneously And the mode rotated freely is embedded in the columned insertion section 15 in the hole 14.

Keeper 12 is substantially in cuboid, in this embodiment, for the easy degree of processing, ensures the easy of precision Degree, keeper 12 is divided into the plate 17 of main body 16 and the back side for being fixed on the main body and formed (reference picture 2).They are utilized Alignment pin etc. and position, and be combined as a whole by bolt (Fig. 3 reference 17a) etc..Above-mentioned hole 14 penetrates main body 16, The preceding table anterior face of plate 17 turns into the bottom surface 14a in hole 14.Moreover, 5 gas source path 18a~18e are offered in the bottom surface (reference picture 3).The preceding surface of the bottom surface 14a in hole 14, i.e. plate 17 is the face that o-ring described later is slided, therefore by smoothly smart Processing, the periphery of the opening of gas source path are finished as that will not be hung with o-ring card.

These gas source paths are spaced apart interval as shown in Figure 3, and are gathered in middle ground arrangement, so as to The combination between pedestal is carried out simultaneously, is released, and such as the path 18a, the 18b, 18c of two paths up and down on right side, a left side in center Two paths 18d, 18e up and down of side consider balance like that and by via arrangement into will not disturb each other.The path in center Path of two paths 18b, 18c on 18a and right side through being formed from plate 17 and in the lateral opening (reference picture on right side 4).Be screwed with the nipple joint (ring nipple joint) 19 for entering joining line to pipe in the openend of these paths, and via pipe and Device for vacuum generation with being fixed on feed bar etc. etc. links.As device for vacuum generation, can be used for example by using literary mound In the device that is operated of compressed air obtained by pipe.Blocked for unwanted path with plug.The right side of Fig. 3 keeper 12 Under reference ST be prevent pedestal 13 rotation limiter.

On the other hand, central path 18a via keeper main body 16 and service tee (ティー) 20 grades and with Vacuum detection switch SW links.The opening of the side on the path 18a in center right side is if it is not required, then such as close with plug Close.Upper and lower path 18e, the 18d in left side is through being formed from the path of plate 17 and in the lateral opening (reference picture 7) in left side.It Link via nipple joint 19 and with the pipe of compressed air, the compressed air is by the gas receiving path of pedestal 13 to gripping Mechanism, the cylinder etc. of reversing device are driven.Cylinder etc. is generally back and forth driven using a path with back-moving spring, but also may be used To use two paths.Blocked if compressed air is not needed with plug.

Fig. 1 is returned to, pedestal 13 possesses the main part 13b of rectangular-shape and protruded from its rear side above-mentioned columned Insertion section 15.In main part 13b corner formed with the cut surface 13c of 45 degree of cuttings.Terminal surface in insertion section 15 is formed There is gas receiving path 21a~21e ((b) of reference picture 4) corresponding with gas source path 18a~18e of plate 17 when mounted. These gas receiving paths extend along insertion section 15 to main part 13b sides, connect with the hole of transverse direction from halfway and are opened to side Mouth (reference picture 6).

In the present embodiment, in the terminal surface 15a of the insertion section 15 of pedestal 13, to surround each gas receiving path Groove or recess 22 of the 21a~21e mode formed with o-ring.In order to by pressing o-ring (Fig. 4 (a) accompanying drawing mark 23) note makes its deformation obtain appropriate sealing pressure, by these recesses 22 be formed as making in the state of nature o-ring 23 from Depth somewhat prominent terminal surface 15a.O-ring utilizes the adhesive bonding for being able to maintain that elasticity in groove or recess 22.

Central gas receiving path 21a in gas receiving path 21a~21e of pedestal 13 is as shown in phantom in Figure 6 Like that, extend from the terminal surface 15a of pedestal 13, in midway and the communication of transverse direction, and in main part with axis parallel 13b lateral opening.Other gas receiving paths 21b~21e also extends parallel to from the end of pedestal 13 with axle, in midway With the communication of incline direction, and main part 13b cut surface 13c be open ((c) of reference picture 4).

Then, pedestal 13 is illustrated to press-in/snap fastener of keeper 12.As shown in figure 1, inserting in pedestal 13 Enter the translot 25 of the ring-type of the outer peripheral face in portion 15 formed with the pod 24 axially extended and circumferentially.Preferably In, as shown in Fig. 4 (b), pod 24 is relative to the substantially symmetrical about its central axis at upper and lower two of insertion section 15.These pods 24 exist It is formed at during fixed pedestal 13 and deviates upper end and the lower end position of some in the circumferential.On the other hand, (a) such as Fig. 4, Fig. 4 (b) shown in, in keeper 12, from hole 14 up and down at two towards protrude on the inside of radial direction by pod 24 and with horizontal stroke The projection 26 that groove 25 engages.

In this embodiment, projection 26 is drawn for a pair up and down by the upper surface for being installed on the main body 16 of keeper with following Part 27 is led to form.The structure of axle 29 that center of the guide member 27 by substantially discoideus installing plate 28 and from the installing plate protrudes Into.Moreover, the thinner columned cam pin 29a at center of the terminal part formed with off-axis of axle 29.The cam pin 29a, from the position that the inner peripheral surface in hole 14 protrudes it is particularly above-mentioned projection 26.

In order to which the pedestal formed as described above 13 is installed on into keeper 12, first, such as Fig. 3 dummy line and Fig. 4 (d) shown in, be slightly tilted pedestal 13 and pod 24 be located at upper-lower position, be set to make pod 24 and the state of the cooperation of projection 26 (insertion position).Then, it is pressed into pedestal 13 vertically from the state.Thus, projection 26 in pod 24 by coming translot 25 Position.In this condition, if rotating clockwise pedestal 13, projection 26 enter translot 25 in, and with the wall 25a of translot Engage (fixed position).These interactions of the pod 24 of pedestal 13, translot 25 and projection 26 act on simultaneously above and below it is prominent Rise between 26 and pod corresponding with them, translot.Therefore, upper and lower balance is obtained, swimmingly access aperture 14 of insertion section 15 In.

In the state of projection 26 engages with translot 25, pedestal 13 is without departing from keeper 12.Dismantled from keeper 12 During pedestal 13, in contrast to the above, rotate counterclockwise pedestal 13, projection 26 comes the position of pod 24.In this condition, by In projection 26 by pod 24, therefore pedestal 13 can be dismantled.

The composition (switching mechanism) that sealing pressure is produced when then, to pedestal 13 is installed on into keeper 12 illustrates. In the state of Fig. 5 (a), O is spaced apart in the terminal surface 15a and the bottom surface 14a (the preceding surface of plate 17) of keeper of pedestal 13 The minim gap of the magnitude of interference size of type ring.Then, the position engaged with the wall 25a of translot 25 of projection 26 is in pod 24 Retain the size P equivalent to the magnitude of interference.After rotating pedestal from the state, projection 26 jumps onto the wall 25a of translot 25.That is, The male bend curved surface of columned projection 26 plays cam effect, while pedestal 13 is pressed while entering translot to axial end side In 25.So that o-ring elastic deformation, and produce sealing pressure.Once projection 26 jumps onto the wall 25a of translot 25, then o-ring The reaction force of elastic deformation born via wall 25a by projection 26, can stably maintain the state.

In this embodiment, if further rotating pedestal 13 after o-ring deformation is made, as shown in Figure 3, pedestal Main part 13b be connected to limiter ST state stopping.In the position (fixed position), the opening of 5 gas source paths With the register of 5 gas receiving paths, path communicates with each other.Then, in the linking part of path, o-ring sealing insertion The terminal surface 15a in the portion 15 and bottom surface 14a in hole 14 gap.

In the case where making pedestal 13 rotate round about, it is set to overcome the frictional force based on sealing pressure and rotate.By This, can dismantle pedestal 13 from keeper 12 in the same manner as described above.

As described above, the position of projection 26 is given to jump onto the height of the wall of translot, and provides to make o-ring generation close Seal the magnitude of interference of pressure.Therefore, in the above-described embodiment, the machine that the position in the pod direction of projection 26 is adjusted is employed Structure.That is, as shown in Fig. 2 forming the elongated hole 30 of arc-shaped in installing plate 28, two bolts or screw by these elongated holes are utilized 31 by installing plate 28 by angular adjustment freely in a manner of be installed on the main body 16 of keeper 12.Moreover, the terminal part of axle 29 is set For the cam pin 29a slightly offset from axle center.Thus, can by being rotatablely installed plate 28, and trip bolt 31 in position The position in the pod direction of the cam pin 29a in Fig. 3 or Fig. 4 is adjusted.In the feelings of the angle of regulation guide member 27 Under condition, with the guide member above and below identical angular adjustment.

After pedestal 13 is installed on into keeper 12, the state is maintained using the frictional force of o-ring etc..Therefore, even if Some external force are applied with, pedestal 13 will not also rotate, and safely be maintained.But in the above-described embodiment, in order to more Safety, employs the locking mechanism that pedestal 13 is locked in fixed position.As shown in Fig. 6 and Fig. 3, in the main body of keeper 12 16 form the breach 33 of rectangular-shape, and the space inside it contains securing rod 34.The depth of breach 33 does not reach cylindrical shape Hole 14 inner circumferential.

As shown in fig. 6, securing rod 34 is rotatably supported by pin 34a, there is locking plate 35 in the side of hole 14.In pedestal 13 Formed with the recess 36 engaged with the locking plate 35.Moreover, as shown in fig. 7, keeper 12 main body 16 formed with from upper table The internal thread hole 37 that surface side penetrates towards breach 33.Moreover, bulb plunger 38, the rolling of end are screwed with the internal thread hole 37 Pearl 39 by pass in and out it is free in a manner of set, and by prominent direction force.On the other hand, locking plate 35 formed with bulb The engaging recessed part 40 that the ball 39 of plunger 38 engages.

Therefore, when securing rod 34 turns to 14 side of hole, the ball 39 of bulb plunger 38 is sticked in the engaging of locking plate 35 Recess 40, as long as therefore do not make its rotation deliberately, securing rod 34 would not move from the latched position.Which thereby enhance safety Property.Further, since the reaction force of the elastic deformation of o-ring is born by engaging of the projection 26 with translot 25, thus will not Produce the power for rotating pedestal 13.So as to which securing rod 34 will not be applied in larger power.Therefore, bulb plunger 38 is to securing rod 34 be constrained to prevents the degree that securing rod 34 departs from by vibration etc..

In the above-described embodiment, provided with 5 gas source paths and gas receiving path but it is also possible to be 1~4, It can also be more than 6.But more changing device of the present utility model can play sufficient effect in the case where setting more than 3 Fruit.In the above-described embodiment, compressed gas is connected with both vacuum loops of vacuum, but can also only has vacuum and return Road or compressed gas.Although in addition, being had in projection 26 a pair, more than three can be also set.In such a situation it is preferred that Be along the circumferential direction to be equally spaced.

In the above-described embodiment, pod and translot are provided with the insertion section of pedestal, but as long as the projection with keeper Engaging, can also substitute groove and use projection.In addition, in the above-described embodiment, employ and the insertion section of pedestal is set to round Column is simultaneously axially inserted into the composition in the hole of keeper, but for example can also be as shown in figure 8, in the insertion section 15 of pedestal 13 Position formed with the generally elliptical shape for foring a pair of notches groove 42, and be configured to detachably be inserted into and be located at In the guiding groove 43 of the section T-shaped of keeper 12.Pedestal 13 is by the position of generally elliptical shape along parallel surface 44 in radius Side is inserted upwardly into, and is internally somewhat rotated.In this case, also using identically with above-mentioned embodiment will by rotation The terminal surface of insertion section 15 presses on the mechanism of the bottom surface in hole 14.

Claims

A kind of 1. more changing device of work holding fixture.In, in work transfer device, it is characterised in that

The more changing device of the work holding fixture.In includes keeper and pedestal, and the keeper is fixed on work transfer device Feed bar, and with the hole with the end of the preceding surface opening of the keeper, base of the pedestal located at work holding fixture.In Portion, and there is insertion section, the insertion section with the insertion position that can be installed and by the fixed position of limitation axial movement it Between the mode that rotates freely be embedded in the hole of the keeper,

The a plurality of gas source path connected with gas source is offered in the bottom surface in the hole of the keeper, in the insertion of the pedestal The terminal surface in portion links with holding member formed with gas receiving path, the gas receiving path and at least in the fixation Position and the gas source communication,

Switching mechanism is provided with the inner peripheral surface in the hole of the keeper and the outer peripheral face of insertion section of pedestal, and the switching mechanism will The operation being pressed into base portion side that pedestal is converted to from insertion position to the rotating operation of fixed position of pedestal.
2. the more changing device of work holding fixture.according to claim 1, it is characterised in that

The gas source path possesses vacuum negative pressure passage and compressed gas path.
3. the more changing device of work holding fixture.according to claim 1 or 2, it is characterised in that

The switching mechanism includes：Located at the hole of keeper inner peripheral surface and pedestal one of the outer peripheral face of cylindrical portion it is prominent Rise or groove；And groove or projection located at another one.
4. the more changing device of work holding fixture.according to claim 1 or 2, it is characterised in that

The switching mechanism is also also used as snap fastener, and the snap fastener is engaged pedestal into not taking off by the rotation of pedestal Fall.
5. the more changing device of work holding fixture.according to claim 3, it is characterised in that

On the inner peripheral surface in the hole of the keeper, multiple projections are protruded towards radial direction inner side,

On the outer peripheral face of the pedestal formed with：The a plurality of pod passed through for projection in the direction of insertion of pedestal；And supply At least one translot that projection engages in the rotation direction of pedestal by and inwall with the terminal part of projection,

The switching mechanism is configured to, and the terminal part of projection is jumped onto side wall and the engaging of translot by the rotation of pedestal, and lead to Cross this and jump onto and pedestal is pressed into base portion side.
6. the more changing device of work holding fixture.according to claim 4, it is characterised in that

On the inner peripheral surface in the hole of the keeper, multiple projections are protruded towards radial direction inner side,

On the outer peripheral face of the pedestal formed with：The a plurality of pod passed through for projection in the direction of insertion of pedestal；And supply At least one translot that projection engages in the rotation direction of pedestal by and inwall with the terminal part of projection,

The switching mechanism is configured to, and the terminal part of projection is jumped onto side wall and the engaging of translot by the rotation of pedestal, and lead to Cross this and jump onto and pedestal is pressed into base portion side.
7. the more changing device of work holding fixture.according to claim 1 or 2, it is characterised in that

The keeper is additionally provided with for limiting the rotation of pedestal in fixed position or releasing the locking member of the limitation.