JPH061287Y2 - Gang head magazine device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a gang head magazine device in a machine tool of a type in which a plurality of gang heads are exchanged for use.

[Prior art]

A gang head magazine device that holds a plurality of gang heads used one after another in this type of machine tool,
A revolving structure that is rotatably supported by a machine frame around a predetermined axis and a gang head that is provided on the outer periphery of the revolving structure at a predetermined angle and can be engaged and disengaged by relative movement in the axial direction. And a plurality of engagement blocks supported on the swing block, and the relative movement of the gang head engaged with the engagement blocks, which is provided on the revolving structure corresponding to each engagement block and is urged by a spring. A plurality of clamp members and a plurality of clamp members are provided on the revolving unit so as to be slidable in the axial direction in relation to the clamp members, and the clamp members are moved against the springs by a predetermined axial movement to move the gang head. What comprises a plurality of unclamp shafts for unlocking and an indexing device for rotating the revolving structure to index a predetermined gang head supported by the revolving structure to a predetermined exchange position. That. In the conventional gang head magazine device of this type, an unclamping cylinder device is provided at a position corresponding to the unclamping shaft of the clamp member that locks the gang head indexed at a predetermined replacement position. The shaft is moved in the predetermined axial direction, the gang head is unlocked, and the gang head is transferred between the revolving structure and the processing apparatus. In addition, at the exchange position where such transfer is performed, it is space-consuming to attach and detach the gang head supported by the revolving structure for exchanging the gang head with an external one. Therefore, it is necessary to perform the operation at a detaching position apart from the above, and therefore it is necessary to provide the same unclamping cylinder device at the detaching position. Then,
All of such unclamping cylinder devices are supported by a bracket provided so as to largely project from the machine frame in order to avoid interference with the gang head.

[Problems to be solved by the invention]

In such a conventional technique, two sets of unclamping cylinder devices and two brackets for supporting the unclamping cylinder device are required, and each bracket is largely projected and must receive the reaction force of the unclamping cylinder device. It has to be fairly sturdy as it has to be, which makes the unclamping device as a whole complicated and large,
There is a problem that the manufacturing cost increases.

[Means for solving problems]

To this end, the gang head magazine device according to the present invention, as illustrated in the accompanying drawings, has a revolving structure 40 rotatably supported by the machine frame 16 so as to be rotatable about a predetermined axis and a predetermined angle on the outer periphery of the revolving structure. A plurality of engaging blocks 42 each of which is provided in advance to support one gang head H so that the gang head H can be engaged and disengaged by relative movement in the axial direction, and the revolving structure 40 is provided corresponding to each engaging block 42. A plurality of clamp members 60 that are biased by the spring 63 and are locked to the gang head H that is engaged with the engagement block to prevent relative movement of the gang head with respect to the engagement block, and each clamp member 60. In relation to
A plurality of unclamp shafts 61 that are slidably mounted in the axial direction and that move the clamp members against the springs 63 by a predetermined axial movement to release the locking of the gang head H; In a gang head magazine device including an indexing device 75 for rotating the revolving structure 40 to index a predetermined gang head H supported by the revolving structure to a predetermined exchange position C, the gang head magazine device is coaxial with the revolving structure 40. Unclamping cylinder device 50 provided in a special manner, and
A rotating member 47 that is coaxially and rotatably supported by the revolving unit 40, and a pivot 71 that is orthogonal to the axis line is provided on the rotating member 47 between each unclamp shaft 61 and the unclamping cylinder device 50. An unclamp lever 70 whose outer end swings in the axial direction by the unclamp cylinder device 50 which is supported so as to project inward and outward in the radial direction via the unclamping cylinder device 50 and is provided on the machine frame 16. The rotating member 47 is detached from the exchange position C at a first position X at which the outer end of the unclamp lever 70 is indexed to the exchange position C and engageable with and disengageable from the unclamp shaft 61. The unclamp shaft 61 indexed to
And a holding device 80 for selectively positioning and holding the second position Y which can be engaged and disengaged.

[Action]

Regardless of the position of the rotating member 47, the inner end of the unclamp lever 70 is always engaged with the unclamp cylinder device 50. Normally, the rotating member 47 is held by the holding device 80 so that the unclamp lever 70 moves to the first position X.
Is positioned and held at an angular position corresponding to. If the unclamping cylinder device 50 is operated in this state, the unclamping lever 70 swings around the pivot 71,
The outer end of the unclamp lever 70 is engaged with the unclamp shaft 61 at the exchange position C to move the unclamp shaft 61 in the axial direction, and the clamp member 60 is moved against the spring 63 to be indexed at the exchange position C. Unlock the gang head H. The transfer of the gang head H from the revolving unit 40 to the processing device side is performed in this released state.

When the gang head H supported by the revolving unit 40 is replaced with an external one, the revolving member 47 is revolved so that the unclamp lever 70 is at an angular position corresponding to the second position Y, and revolving. The rotating member 47 is positioned and held by the body 40. If the unclamping cylinder device 50 is operated in this state, the gang head H indexed to the removal position D is unlocked by the same action as described above. Therefore, the gang head H should be replaced with an external one. Is possible.

The reaction force generated when the locking of the gang head H is released against the spring 63 is received by the revolving unit 40 and the rotating member 47 supported by the revolving unit 40, and the holding device 8 is provided.
0 only holds the rotating member 47 at both positions X and Y, and the reaction force is not applied.

[Effect of device]

As described above, according to the present invention, since the unclamping cylinder device for releasing the lock of the gang head indexed to both the replacement and removal positions is common, one set is sufficient and the reaction generated in each part is eliminated. The supporting members that receive the force are all assembled to the revolving structure, and the holding device that needs to be installed so as to protrude significantly from the machine frame to avoid interference with each gang head has no reaction force for unlocking the gang head. Since it is not added, it is not necessary to increase strength and rigidity. Therefore, the structure of the gang head magazine device, particularly the unclamp device for releasing the lock of the gang head supported by the gang head magazine device, can be simplified and downsized as a whole, and the manufacturing cost can be reduced.

〔Example〕

The present invention will be described below with reference to the embodiments shown in FIGS.

First, referring to FIG. 2, a machine tool equipped with a gang head magazine device M according to the present invention will be described.
A drive unit 12 is supported above the feed unit 11 and is fed in the front-rear direction, and an index device 20 is supported above the drive unit 12 by a bed 10 via a gate-shaped column 13. Horizontal axis 2 in front-back direction
Rotating body 2 supported by the index device 20 via
Reference numeral 5 designates detachably supported two gang heads H on the radially outer sides facing each other, and the gang heads H are rotated by a hydraulic motor 22 to move the gang heads H to an upper position A and a lower position which is a front surface of the drive unit 12. It is designed to index B. The drive unit 12 mounts the gang head H indexed to the lower position at the tip and drives it, and moves forward to process the workpiece W on the workpiece support 15. As shown in FIG. 3 and FIG. 1, a T-groove metal Ha having three pairs of inward projections Ha1 is fixed to one side surface of each gang head H, while a shaft is attached to each outer side portion of the rotating body 25. T having three pairs of outward protrusions that engage with the inward protrusion Ha1 so as to be slidable in the direction
The metal fitting 26 is fixed, and the gang head H is supported by the rotating body 25 by the engagement of the two metal fittings Ha and 26. Also, on the surface opposite to the T-groove metal Ha of each gang head H,
Mainly as shown in FIGS. 3 and 1, a T-shaped engaging body Hb having three pairs of outward protrusions Hb1 is fixed.

As shown in FIG. 2, on the rear side of the bed 10, a machine frame 1 including a lower machine frame body 16a and an upper magazine support portion 16b is provided.
6 is provided, and the magazine supporting unit 16b is provided with the transfer device 30 located behind the upper position A. The transfer device 30 mainly includes a sub-arm 31 and a cylinder device 33 that are pivotally supported by the magazine support member 16b by a horizontal shaft 32. In the transfer device 30, the gang head H, which is supported by the rotating body 25, is indexed to the upper position A by the index device 20, and is locked to the tip of the sub-arm 31, is retracted by the built-in clamping cylinder device. The inward projection Ha1 of the T-groove metal fitting Ha is disengaged from the engagement with the T-shaped metal fitting 26, and at the same time, clamped to the front end portion, and the cylinder device 33 rotates the sub arm 31 around the horizontal shaft 32 so that the magazine device M described later is rotated. The gang head H is moved to the exchange position C, and the gang head H is moved forward (raised) by the built-in clamping cylinder device to release the clamp, and at the same time, the magazine device M is moved through the engaging body Hb.
Supported by the revolving unit 40, and conversely to the above, the revolving unit 40
The gang head H, which is supported by and is indexed to the exchange position C, is moved to the upper position A and supported by the rotating body 25. Each inward projection Ha1 of the T-groove metal Ha and the engaging body Hb
Each of the outward protrusions Hb1 of the
1 is formed so as to extend along the circumferential direction centered on the horizontal shaft 32 in a state of being clamped at the tip end portion of 1, and each outward projection of the T-shaped metal fitting 26 of the rotating body 25 is divided to the upper position A. It is formed so as to be inclined so as to extend along the circumferential direction centered on the horizontal axis 32 in the extended state.

As shown in FIG. 2, a magazine device M, which is an essential part of the present invention, is provided above the magazine support portion 16b, which is located at the upper rear of the upper position A. The magazine device M is the first
As shown in the figure, a regular polygonal column-shaped (for example, regular pentagonal column) -shaped revolving body 40 fixed to the upper end of a revolving shaft 41 that is vertically supported by the magazine support portion 16b is provided, and a plurality of (for example, (5) engagement blocks 42 are fixed at equal angular intervals. Each engagement block 42 has three pairs of L-shaped projections 4 forming a T-groove, mainly as shown in FIGS. 1 and 3.
2a, the L-shaped projection 42a is an outward projection H of the engaging body Hb when the gang head is in the lowered position indicated by H '.
Although it does not engage with b1, it engages with the outward protrusion Hb1 at the raised position indicated by H, and thus supports the gang head H in a disengageable manner by relative movement in the vertical direction. As shown in FIG. 2, an indexing device 75 is provided on the lower side of the magazine device M. The indexing device 75 rotates the revolving unit 40 via the revolving shaft 41, and is supported by the revolving structure 40 to be used next. Index the gang head H to the replacement position C,
Also, the gang head H, which should be replaced with an external one,
It is for indexing to the removal position D which is separated from the exchange position C.

As shown in FIG. 1, a plurality of clamp members 60 are provided on the outer peripheral portion of the revolving structure 40 so as to be capable of projecting and retracting in the radial direction so as to correspond to the respective engagement blocks 42. It is installed so that it can move in the vertical direction. The wedge body 61a below the clamp shaft 61 and a part of the clamp member 60 are cut out in a semicircular shape over a considerable length, and the inclined groove 62 formed on the inner surface of the cutout portion of the wedge body 61a is formed on the inner surface of the cutout portion of the clamp member 60. It engages with the formed projection (not shown). The clamp shaft 61 is biased upward by a spring 63 interposed between a ring 64 fixed to an intermediate portion of the clamp shaft 61 and the revolving structure 40, and this biasing force is exerted through a slant groove 62 and a protrusion (not shown). 60 is urged radially outward.
The clamp member 60 is in a raised position where the engagement body Hb engages with the engagement block 42 and engages with the lower surface Hc of the gang head H supported by the revolving structure 40, and the gang head H is in the lower position H ′ due to its own weight. The engagement of the engaging body Hb with the engaging block 42 is prevented from being disengaged.

As shown in FIG. 1, an unclamping cylinder device 50 is provided inside the revolving structure 40 coaxially with the revolving shaft 41. Housing 51 of unclamping cylinder device 50
Is clamped and fixed to the revolving unit 40 by the ring screw 45, and is clamped and fixed to the cylinder 52 inside thereof. The upper rod 54 of the piston 53, which is hermetically fitted in the cylinder 52, is formed coaxially with the revolving unit 40. The shaft-shaped member 51a on the upper part of the housing 51 is slidably and airtightly penetrated to project upward. The lower rod 55 of the piston 53 slidably and airtightly penetrates the swivel shaft 41 and projects downward, and a pair of communication passages 55a for introducing and discharging compressed air into the working chambers above and below the cylinder 52 in the lower rod 55. , 55b are formed.

A rotary ring 46 is rotatably supported by a shaft-shaped portion 51a of the housing 51 via a roller bearing and a ring nut 48. The rotary ring 46 has an unclamping cylinder device 50.
Upper piston rod 54 and a plurality of unclamp shafts 61
A cylindrical rotating member 47 located between and is fixed. An unclamp lever 70 that projects inward and outward in the radial direction is supported on one upper side of the rotating member 47 via a horizontal pivot shaft 71, and the inner end of the unclamp lever 70 is an engaging step 54 a above the upper rod 54. And a flange member 56 whose position can be adjusted. When compressed air is introduced into the working chamber below the cylinder 52 to operate the unclamping cylinder device 50, the upper rod 54 moves upward and the outer end of the unclamping lever 70 moves downward. The clamp shaft 61 at the engaging position is axially moved downward against the spring 63 to retract the clamp member 60, unlock the gang head H from the revolving structure 40, and lower the gang head H. As a result, the engagement support by the engagement block 42 and the engagement body Hb can be released.

As shown in FIGS. 1 and 2, the holding device 80 for restraining the free rotation of the rotating member 47 rotatably supported by the revolving unit 40 and positioning and holding the same at a predetermined position is provided with a gang head H. In order to avoid the interference of the gang head H, a gate-shaped fixed frame 81 which is erected on the magazine support portion 16b so as to straddle the magazine device M including the gang head H and protrudes above the rotating member 47, and the rotating member 47. It comprises a bracket 82 which is suspended and fixed to the fixed frame 81 above, and a part 82a of the bracket 82 is connected to the upper part of the rotating member 47 by a mounting screw 83 to restrain the rotation thereof. Two screw holes 47 are provided on the upper part of the rotating member 47.
a and 47b are provided, and when the rotating member 47 is connected to the bracket 82 via one screw hole 47a as shown in FIG. 1, the outer end of the unclamp lever 70 is split to the exchange position C. It is positioned and held at the first position X where it can be engaged with the unclamp shaft 61 corresponding to the ejected gang head H. In addition, the mounting screw 83 is removed to remove the rotating member 4.
7 is manually rotated by a predetermined angle, and the other screw hole 47b
When the unclamp lever 70 supported by the rotating member 47 has an outer end corresponding to the gang head H indexed to the detached position D, the unclamp lever 70 supported by the rotating member 47 corresponds to the gang head H when the unclamp lever 70 is connected to the bracket 82 via the. The clamp shaft 61 is positioned and held at a second position Y that can be engaged with the clamp shaft 61.
Regardless of whether the unclamp lever 70 is indexed to the X or Y position, the inner end of the unclamp lever 70 has the unclamp cylinder device 50.
Remains engaged with the upper rod 54 of the.

In the normal operating state, the rotating member 47 is in the first position X.
It is located in. Immediately after the gang head H used by being mounted on the drive unit 12 is replaced and processing is started, the used gang head H is at the upper position A.
The replacement position C is empty, and the unclamping cylinder device 50 of the clamp member 60 at that position is empty.
It has retreated due to the operation of. In this state, the used gang head H indexed to the upper position A is clamped to the tip of the sub-arm 31 as described above, moved to the exchange position C by the rotation of the sub-arm 31, and is incorporated in the sub-arm 31. The clamp cylinder is lifted to release the clamp from the sub arm 31 and simultaneously engages with the engaging block 42. Then, the outer end of the unclamp lever 70 is raised by the operation of the unclamping cylinder device 50, and the clamp member 60 is advanced by the spring 63 to stop the movement of the gang head H with respect to the revolving unit 40. In this state, the indexing device 75 operates, indexes the gang head H to be used next to the replacement position C, and engages the tip portion of the sub arm 31. Next, after the clamp member 60, which has locked the gang head H indexed to the replacement position C by the unclamping cylinder device 50, retracts, the clamping cylinder device in the sub-arm 31 operates, and the gang head H descends. And the engagement with the engagement block 40 is released, and at the same time, the sub arm 3
Clamp to the tip of 1. Then, as described above, the gang head H is moved to the upper position A by the rotation of the sub arm 31, is engaged with and supported by the rotating body 25, and is driven by the drive unit 1.
It is in a standby state waiting for replacement with the gang head H on the second side.

When the gang head H supported by the revolving unit 40 is to be replaced with an external one, the mounting screw 83 is once removed, the rotating member 47 is manually rotated, and the screw hole 47b.
And is positioned at the second position Y by being connected to the bracket 82. In this state, the indexing device 75 is actuated to index the gang head H to be replaced with an external one to the removal position D, and after supporting the gang head H with a hoist or the like, the unclamping cylinder device 50 is actuated. Clamp member 6 via unclamp shaft 61
0 is retracted to unlock the gang head H. Next, the hoist is operated to move the gang head H downward to release the engagement with the engagement block 42 and remove it. Next, the new gang head H is supported by the hoist and engaged with the engagement block 42 at the removal position D, and the unclamping cylinder device 50 is actuated to unclamp the lever 70.
The gang head H is completely replaced when the outer end of the gang head H is raised and the clamp member 60 is advanced by the spring 63 to lock the gang head H on the revolving structure 40.

As described above, according to the present embodiment, by positioning and holding the rotating member 47 at the first position X and the second position Y, replacement and removal by the set of the unclamping cylinder device 50 and the unclamping lever 70 are performed. The gang head H can be engaged and disengaged at both positions C and D, and all the reaction force generated in each part by the operation of the unclamping cylinder device 50 is received by the member assembled to the revolving structure 40. It is possible to obtain an unclamping device for a gang head magazine device having a simple structure, small size and light weight, and high strength and rigidity. Note that the fixed frame 81 of the holding device 80 attached to the magazine support portion 16b needs to be provided so as to overhang to prevent interference with the gang head H, but this fixed frame 81 is provided for the rotating member 4.
It only blocks the free rotation of 7, and does not apply a large force, so that a relatively small strength and rigidity is sufficient.

[Brief description of drawings]

The attached drawings show an embodiment of a gang head magazine device according to the present invention. Fig. 1 is a longitudinal sectional view of a main part, Fig. 2 is an overall side view of a machine tool equipped with the gang head magazine device of the present invention, FIG. 3 is a front view of the gang head. Explanation of reference numerals 16 ... Machine frame, 40 ... Revolving body, 42 ... Engaging block, 47 ... Rotating member, 50 ... Unclamping cylinder device, 60 ... Clamping member, 61 ...
Unclamp shaft, 63 ... Spring, 70 ... Unclamp lever, 71 ... Pivot shaft, 75 ... Indexing device, 80 ... Holding device, C ... Exchange position, D ...
Removal position, X ... first position, Y ... second position.

Claims (1)

[Scope of utility model registration request] 1. A revolving structure rotatably supported by a machine frame about a predetermined axis, and a gang head provided at a predetermined angle on the outer periphery of the revolving structure, each having a gang head in the axial direction. A plurality of engagement blocks that are supported so that they can be engaged and disengaged by movement, and that are locked to the gang head that is provided on the revolving structure corresponding to each engagement block and is urged by a spring to engage with the engagement block. And a plurality of clamp members that prevent relative movement of the gang head with respect to the engagement block, and a plurality of clamp members that are slidably provided in the revolving structure in the axial direction in association with the respective clamp members by the predetermined axial movement. A plurality of unclamp shafts that move the clamp member against the spring to release the locking of the gang head, and a predetermined gang head supported by the revolving structure by rotating the revolving structure. In a gang head magazine device provided with an indexing device for indexing to a predetermined exchange position, an unclamping cylinder device coaxially provided on the revolving structure and a rotatably supported coaxially device on the revolving structure. Between the rotating member and each of the unclamping shafts and the unclamping cylinder device, the rotating member is supported by the rotating member so as to project inward and outward in the radial direction via a pivot shaft orthogonal to the axis, and is always engaged with the inner end. An unclamp lever whose outer end swings in the axial direction by the unclamping cylinder device and an outer end of the unclamp lever which is provided on the machine frame and is indexed to the exchange position. Selectable between a first position at which the unclamp shaft can be engaged and disengaged, and a second position at which the unclamp shaft can be engaged and disengaged, which is indexed to a removal position away from the replacement position Gang head magazine device being characterized in that a holding device for positioning and holding the.