JPH08108231A - Table closing gear for punch press - Google Patents

Abstract

PURPOSE: To enable an opening/closing table for changing dies to be fully opened without causing interference with peripheral equipment, etc., and also to facilitate its opening/closing operation. CONSTITUTION: A fixed table 3a is provided on the outer circumference of a turret 2, and a part of the table is made an opening/closing table 13. An elevation supporting mechanism 14 is provided by which the opening/closing table 13 is supported vertically movably to a lower retracting position. The elevation supporting mechanism 14 is constituted of a parallel link mechanism 16 or a guide by means of a cam groove, for example. The elevating route of the opening/closing table 13 by means of the elevation supporting mechanism 14 is a route going away from the turret 2 toward the outer diameter side at a slightly lowered position. The opening/closing table 13 can be locked by a locking mechanism at the height of the fixed table 3a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a table opening / closing device for a punch press, which is applied to a turret punch press or the like to open / close a part of the table for replacement of a die or the like.

[0002]

2. Description of the Related Art Conventionally, in a turret punch press having a structure shown in FIG. 8, a table 51 is composed of a turret peripheral fixed table 51a around a lower turret 52, a central fixed table 51b, and slide tables 51c on both sides thereof. are doing. The work W on the table 51 is the carriage 5
3, the slide table 51c is moved back and forth (Y-axis direction), and the work holder 54 is moved left and right (X-axis direction) along the carriage 53 so as to be sent to the punch position P. Turret surrounding fixed table 51a
In order to replace the die 55 installed on the lower turret 52 at the time of mold replacement, an open / close table 56 is separated from other parts, and a fulcrum 56 is shown as a chain line.
It is supported so as to be openable and closable outwardly around a. Alternatively, the open / close table 56 is removable.

[0003]

However, if the open / close table 56 is horizontally opened / closed and rotated outward as described above, the open / close table 56 may be opened due to obstacles in the surroundings depending on the type of punch press. It may not be fully opened. For example, in order to speed up the work feeding, the slide table 51c has a narrow width of L in the X direction to reduce the weight of the movable part, and instead, a side fixed table 57 shown by a chain line is provided. The applicants have proposed.

In the punch press of this type, as can be seen from the figure, the open / close table 56 interferes with the side fixed table 57 in the open state, and cannot be opened sufficiently. Therefore, there is a problem that the work space is small and it is difficult to perform the die replacement work of the lower turret 52. Further, when the open / close table 56 is rotated horizontally, the open / close table 56 may not be stable in the open state, and wobble may occur, which may also reduce the workability of die replacement. When the opening / closing table 56 is detachable and is detached and placed in another place, there is no problem of interference with the side fixed table 57, but it takes time to attach / detach and carry it, and the opening / closing table 56 is also used. The storage space is needed while the is removed, and the fixing bolt may be lost.

An object of the present invention is to open an open / close table provided around a die holding table such as a turret and the like so that it can be sufficiently opened without causing interference with peripheral devices and the like, and a work space for die exchange is expanded. (EN) Provided is a table opening / closing device for a punch press which can be opened and closed easily. Another object of the present invention is to make it possible to stably fix the open / close table in the closed state, and to fix and unlock the open / close table by an easy operation. Still another object of the present invention is to enable the open / close table to be raised and lowered without causing interference with the turret even when the turret has a peripheral edge under the open / close table.

[0006]

According to the table opening / closing device of the punch press of the present invention, a fixed table is provided on the outer periphery of a die holding table equipped with a die, and a part of the fixed table in the circumferential direction is separated from other parts. The open / close table is provided with a lift support mechanism that supports the open / close table so that the open / close table can be moved up and down to a relief position. The die holding table is composed of a turret or the like. In the above structure, a lock mechanism is provided to lock the open / close table at the height of the fixed table in the downward blocking state, and the lock mechanism engages and disengages the engaging portion and the engaged portion by the operation of the operator. Preferably. Further, it is preferable to set an ascending / descending path of the open / close table by the ascending / descending support mechanism so as to escape from the turret to the outer diameter side at a position slightly lower than the height of the fixed table.

[0007]

[Operation] When the die on the die holding table such as the turret is replaced, the opening / closing table is retracted downward by the guide of the lifting / lowering support mechanism and a part of the periphery of the die holding table, that is, the portion where the opening / closing table was located is opened. . The die is exchanged for the turret in this open space. In this case, since the open / close table is retracted downward, even if there is another fixed table or the like near the normal position of the open / close table, the open / close table can be opened fully without causing a problem of interference. Therefore, the work space can be expanded regardless of the peripheral configuration, and the die can be easily replaced. When the above-mentioned lock mechanism is provided, when the open / close table is returned to the height position of the fixed table which is the use position, it can be locked by the engagement / disengagement operation by the operator. Therefore, the open / close table is stable, and fixing work with bolts or the like is unnecessary, so that the open / close table can be easily fixed and released. When the lifting / lowering path of the open / close table by the lifting / lowering support mechanism is set to a path that escapes from the turret to the outer diameter side, interference with the turret occurs even in the case of a positional relationship in which the peripheral edge of the turret enters under the open / close table. You can raise and lower the open / close table without using it.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a broken plan view of a turret type punch press to which this table opening / closing device is applied. The lower turret 2 is provided on the frame 1 so as to be indexable and rotatable,
A table 3 on which the work W is placed is provided around it. The lower turret 2 serves as a die holding table, and dies 4 are arranged side by side in the circumferential direction on the outer peripheral portion. Each die 4 is provided on a die holding table 5 and is attachable to and detachable from the lower turret 2 together with the die holding table 5. At the punch position P, punching is performed by the punch tool (not shown) of the upper turret 6 (FIG. 3) and the die 4.

In FIG. 4, the table 3 includes a turret surrounding fixed table 3a surrounding the lower turret 2, a central fixed table 3b in front of the turret, slide tables 3c and 3c on both sides of the fixed table 3a, and outer side fixed parts. Table 3
d and 3d. Free bearings (not shown) and the like are provided on the tables 3a to 3d. The side fixed table 3d has a front-rear length of approximately the turret fixed table 3a.
And the central fixed table 3b are combined. The slide tables 3c and 3c are narrow,
It is fixed integrally with the carriage 7 at the front end and moves forward and backward (Y-axis direction) on the rail 9 of the bed 8. Carriage 7
A cross slide 10 having a work holder 11 is mounted movably in the left and right directions (X-axis direction), and the work W is moved by moving the carriage 7 back and forth and moving the cross slide 10 left and right.
Are sent to the punch position P in the front, rear, left and right directions. The carriage 7, the cross slide 10, and the work holder 11 constitute a work feeding mechanism 12.

As shown in FIG. 1, the turret surrounding fixed table 3a slightly covers the upper rim of the lower turret 2. The turret surrounding fixed table 3a is an opening / closing table 13 in which a part of one side of the lower turret 2 extending slightly from the center of the turret to the rear is separated from other parts.
There is. The open / close table 13 is supported by a lifting / lowering support mechanism 14 of FIG. 1B so as to be lifted / lowered to a lower relief position indicated by a chain line.

The elevating support mechanism 14 comprises a parallel link mechanism 16 in which two vertically separated links 16a and 16b are vertically rotatably connected to a table side support member 17 and a frame side support member 18. The table side support member 17 is fixed to the lower surface of the open / close table 13, and the frame side support member 1
8 is fixed to the frame 1 by bolts. As shown in FIGS. 2 and 3, the parallel link mechanism 16 is provided in a pair at both ends of the open / close table 13, and the connecting shaft 19 that connects the links 16a and 16b and the table side support member 17 has the left and right parallel links. It is formed by one shaft extending between 16 and 16.

Further, the open / close table 13 is attached to the table side support members 17 on both sides by the turret surrounding fixed table 3a.
A lock mechanism 20 is provided that locks in the descent prevention state at the height of. The lock mechanism 20 includes a pin-shaped engaging portion 20 in a case 20 a fixed to the table-side support member 17.
b is provided with a built-in spring in a protruding urging state, and the engaged portion 20c
To be engaged with. The engaged portion 20c is a ring-shaped member having a recessed portion at the center for fitting the pin-shaped engaging portion, and the outer peripheral surface thereof is a tapered surface. The engaged portion 20c protrudes from the frame 1 outside the parallel link mechanism 16. Fixed arm 21
It is provided in. The pin-shaped engaging portion 20b can be retracted by a lever-shaped operator 20d integrally connected thereto against the built-in spring.

The operation and operation method of the above configuration will be described. The open / close table 13 is normally at the same level as the turret periphery fixed table 13a as shown by the solid line in FIG. 1 (B), slightly covers the upper peripheral edge of the lower turret 2, and is used for guiding the work W. . When replacing the die 4 of the lower turret 2, the open / close table 13 is opened downward as follows. That is, the operators 20 of the lock mechanisms 20 on both sides
By pulling d, the pin-shaped engaging portion 20b and the engaged portion 20c
To disengage from. As a result, the open / close table 13 can be lowered by its own weight while being supported by the parallel link mechanism 16, and is lowered while supporting the open / close table 13 by hand. When it is lowered to the lower end, the hand is released from the open / close table 13, and the open / close table 13 is placed at that position by the parallel link mechanism 16
Suspend with.

The lowering path of the open / close table 13 is supported by the parallel link mechanism 16, so that the lower path of the lower turret 2 escapes to the outer diameter side as shown by the curve a in FIG. It becomes the route of. Therefore, even though the peripheral edge of the lower turret 2 is inserted under the opening / closing table 13 in a normal state, the opening / closing table 13 is not moved to the lower turret 2
Can be lowered without interfering with. Interference is similarly avoided when the open / close table 13 is raised. When returning the open / close table 13 to the original position, the open / close table 13 is manually lifted to the original position. Thereby, the lock mechanism 20
Of the pin-shaped engaging portion 20b is guided by the tapered surface of the outer periphery of the engaged portion 20c and is temporarily retracted, so that the engaged portion 20c
It engages by projecting at a position that fits into the central recessed portion of. By thus being locked by the lock mechanism 20, the open / close table 13 is held at the normal position.

According to this table opening / closing device, since the opening / closing table 13 is retracted downward in this manner, the side fixed table 3d is provided near the opening / closing table 13.
Even with (Fig. 4), it can be opened to the fully open state without causing interference problems. Therefore, the working space can be expanded and the die can be easily replaced. Further, since the open / close table 13 is engaged by the engagement type lock mechanism 20 at the normal position, it can be disengaged and lowered by only the pulling operation of the operator 20d, and at the time of returning it. Lock mechanism 2 just by lifting open / close table 13.
0 is naturally locked. Therefore, the open / close table 13
You can easily open and close.

5 to 7 show another embodiment. In this example, an elevating and lowering support mechanism 24 that guides the open / close table 13 in an elevating and lowering manner is provided with a plate-like elevating and lowering guide 25 and rollers 26 and 26 that engage with two parallel cam grooves 29 and 29 of the elevating and lowering guide 25. And the table side support plate 27 to which is attached. The table-side support plate 27 is fixed to the lower surface of the open / close table 13 and has an L-shaped side surface shape whose lower end extends inward, and the roller 26 is attached to a portion 27a near the inner end thereof. The elevating guide 25 is fixed to the frame 1 via a mounting member 28. The cam groove 29 extends in the vertical direction, and an inclined portion 29a that is inclined downward toward the outside is provided near the upper end. This inclined portion 29
a serves as a relief mechanism that allows the open / close table 13 to escape to the outside. The elevating guide 25 and the table side support plate 27 are provided on both sides of the opening / closing table 13, and the table side support plates 27, 27 on both sides are connected to each other by a support plate connecting member 30. A spring receiving piece 30a is provided at the rear end of the table side support plate 27.
The frame 1 is provided with a spring guide post 40 on which 0a is mounted and a spring 41. That is, the spring guide post 40 is installed on the post support member 39 provided at the lower end of the elevating guide 25 so as to be able to move up and down, and the spring 41 is provided between the upper end of the spring guide post 40 and the post support member 39 to urge the post 40 upward. There is. Therefore, while receiving the weight of the open / close table 13 as a cushion,
Opening and closing work can be reduced. An opening / closing unit body cover 31 extending downward from the outer edge of the opening / closing table 13 is attached to the opening / closing table 13.

Locking mechanisms 32 for locking the open / close table 13 at the height position of the fixed table 3a are provided on the table side support plates 27 on both sides. The lock mechanism 32 includes a U-shaped rod-shaped engaged portion 32c (FIG. 7) attached to the upper end of the elevating guide 25 and an upwardly opening tapered guide groove into which the engaged portion 27d is inserted. A case 32a (FIG. 5) having the same, and an engaging portion 32b (FIG. 7) which engages with the engaged portion 32c inserted in the guide groove so as to be detachable from the U-shaped front surface thereof. By pushing the operating element 32d protruding from the lower surface of 32a, the engaging portion 32
The engagement of b can be released. Also, the engaging portion 32b
When the engaged portion 32c is pushed in, it can be freely retracted and engaged against the built-in spring, but has a shape that does not disengage in the direction in which the engaged portion 32c comes out of the groove. There is.

The lock mechanisms 32, 32 on both sides can be simultaneously disengaged by a push button 34a of one handle 34 by the interlocking mechanism 33. The handle 34 is
It is attached to the support plate connecting member 30 from the outside of the opening / closing unit body cover 31. The interlocking mechanism 33 is the operator 3 of the lock mechanism 32.
The push-in pin 36 whose tip hits 2 is supported by a pin guide 37 so as to be able to move back and forth, and the lock mechanisms 32, 32 on both sides are also supported.
The push-in pins 36, 36 are connected by a pin connecting member 38. The pin guide 37 is attached to the table side support plate 27. When the push button 34a is pushed on the handle 34, a projecting and projecting member (not shown) is projected from the rear surface, and the projecting operation of the projecting and projecting member is pinned through a transmission piece (not shown). It can be transmitted to the connecting member 38.

In the case of this construction, the open / close table 13 has rollers 26 in the guide grooves 29 of the elevating guides 26, 26 on both sides.
Is opened downward while rolling, and the roller 26 abuts on the lower end of the guide groove 29 to be supported in the lowered position. Guide groove 2
Since 9 has the inclined portion 29a near the upper end, the open / close table 13 slightly descends and then escapes to the outside. Therefore, the opening / closing table 13 is prevented from interfering with the turret 2. Interference is similarly avoided when the open / close table 13 is lifted. The lifting and lowering work of the open / close table 13 is performed by holding the handle 34. When the open / close table 13 is at the height of the turret surrounding fixed table 3a, the lock mechanism 32
Is locked and fixed in position. When the push button 34a of the handle 34 is pushed in this state, the operator 32d of the lock mechanism 32 is pushed through the pin connecting member 38 and the push pin 36, and the engaged portion 32c and the engaging portion 32b are engaged. Unlocked by. Therefore, the open / close table 13 can be lowered. When the open / close table 13 is lifted, the case 3 of the lock mechanism 32 is
The engaged portion 32c is fitted into the groove of 2a, and the engaging portion 32
Engagement by b is performed naturally. In this way, since the lock mechanism 32 can be unlocked and the open / close table 13 can be lifted and lowered by operating the handle 34 with the push button at the center, the open / close operation of the open / close table 13 can be easily performed.

Although each of the above embodiments has been described as applied to a turret punch press, the present invention can also be applied to a case where a die holder different from the turret is used.

[0021]

In the punch press table opening / closing device of the present invention, a fixed table is provided on the outer periphery of a die holding table equipped with a die, and a part of the fixed table in the circumferential direction is separated from other parts. In addition, since an elevating and lowering support mechanism is provided to support the open / close table so that it can be moved up and down to the relief position below, the open / close table can be opened sufficiently without causing interference with peripheral devices, etc. The space can be expanded and the opening / closing operation can be easily performed. In the case of the invention of claim 2, a lock mechanism is provided for locking the open / close table in a lowering prevention state at the height of the fixed table, and the lock mechanism is such that the engaging portion and the engaged portion can be operated by operating the operating element. Since it is designed to engage and disengage freely,
The open / close table can be stably fixed in the closed state, and the fixing and the fixing release can be performed by an easy operation. According to the invention of claim 3, when the die holding base is a turret, a path for escaping from the turret to the outer diameter side at a position slightly lower than the height of the fixed table in the ascending / descending path of the opening / closing table by the elevating / lowering support mechanism. Therefore, even when the peripheral edge of the turret is placed under the open / close table, the open / close table can be raised and lowered without causing interference with the turret.

[Brief description of drawings]

FIG. 1A is a partial plan view of a punch press to which a table opening / closing device according to an embodiment of the present invention is applied, and FIG.
Is a cutaway side view thereof.

FIG. 2 is a front view of the table opening / closing device.

FIG. 3 is a perspective view of the table opening / closing device.

FIG. 4 is a cutaway plan view of a turret punch press to which the table opening / closing device is applied.

FIG. 5 is a cutaway side view of a table opening / closing device according to another embodiment of the present invention.

FIG. 6 is a plan view of the table opening / closing device.

FIG. 7 is a front view of the table opening / closing device.

FIG. 8 is a plan view of a punch press equipped with a conventional table opening / closing device.

[Explanation of symbols]

1 ... Frame, 2 ... Lower turret (die holding table), 3 ... Table, 3a ... Turret peripheral fixed table, 4 ... Die,
5 ... Die holder, 13 ... Opening / closing table, 14 ... Elevating support mechanism, 16 ... Parallel link mechanism, 16a, 16b ... Link, 17 ... Table side support member, 18 ... Frame side support member, 19 ... Connection shaft, 20 ... Lock mechanism , 20b ... Engaging portion, 20c ... Engaged portion, 20d ... Operator, 21 ... Fixed arm, 24 ... Lift support mechanism, 25 ... Lift guide, 26 ...
Roller, 27 ... Table side support member, 29 ... Cam groove, 2
9a ... Inclined part, 30 ... Support plate connecting material, 32 ... Lock mechanism, 32b ... Engagement part, 32c ... Engaged part, 32d ... Operator, 33 ... Interlocking mechanism, 34 ... Handle, 34a ... Push button, a … Curve (path)

Claims (3)

[Claims] 1. A fixed table is provided on the outer circumference of a die holding table equipped with a die, and a part of the fixed table in the circumferential direction is used as an open / close table which is separated from other parts, and the open / close table is provided to a lower escape position. A punch press table opening / closing device provided with an elevating and lowering support mechanism for supporting elevating and lowering. 2. The die holding table is a turret, and a lock mechanism is provided for locking the opening / closing table in a lowering prevention state at the height of the fixed table. The lock mechanism has an engaging portion and an engaged portion. The table opening / closing device for a punch press according to claim 1, wherein the table is opened / closed by an operation of an operator. 3. The die holding table is a turret, and the raising / lowering path of the opening / closing table by the raising / lowering support mechanism is set to a path that escapes from the turret to the outer diameter side at a position slightly lower than the height of the fixed table. A table opening / closing device for a punch press according to claim 1 or 2.