JP4097797B2 - Clamp avoidance device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a clamp avoidance device, and more particularly to a clamp avoidance device in a turret punch press.
[0002]
[Prior art]
Conventionally, in a turret punch press, a clamp device 66 is attached via a carriage base 11 (FIG. 7) and a carriage 12, and the workpiece W is gripped by the clamp device 66 and positioned at a predetermined position. ing.
[0003]
In this turret punch press, the clamping device 66 can pass between the upper turret 6 and the lower turret 7 in order to reduce the dead zone, which is a portion that cannot be punched, as much as possible (FIG. 7). (Above).
[0004]
However, when the clamp device 66 is positioned on the die D and the punch P is lowered in this state, the clamp device 66 is punched and damaged.
[0005]
Therefore, when the clamping device 66 enters the override region K (FIG. 5), a clamp avoiding device that releases the workpiece W and allows the clamping device 66 to avoid the turrets 6 and 7 has been conventionally used. Yes.
[0006]
In the conventional clamp avoidance device, for example, avoidance drive means 61 such as an air cylinder built in the main body 60 is coupled to the rear end of the base 63 via a piston rod 65, and the base 63 is connected to the main body 60 via a guide 62. It has the structure attached to movably.
[0007]
With this configuration, when the clamping device 66 enters the override region K (FIG. 5), the clamper 64 is opened (the lower diagram in FIG. 7) to release the workpiece W and to operate the avoidance driving means 61.
[0008]
As a result, the base 63 coupled to the avoidance driving means 61 via the piston rod 65 and the clamper 64 pivotably attached to the base 63 are integrally moved backward to the carriage base 11 side. (Bottom of FIG. 7), the clamping device 66 can avoid the turrets 6, 7, and damage to the clamping device 66 is prevented.
[0009]
[Problems to be solved by the invention]
[0010]
As described above, the conventional clamp avoidance device shown in FIG. 7 has the avoidance drive means 61 attached to the clamp device 66 side.
[0011]
Accordingly, the weight of the clamping device 66 is increased, and the positioning operation is delayed.
[0012]
Further, air piping and electrical wiring necessary for the avoidance driving means 61 must be attached to each of the clamp devices 66.
[0013]
This complicates the structure of the clamp avoiding device and increases the failure rate. Further, along with this, the number of clamp devices 66 to be attached is limited and cannot be increased easily.
[0014]
An object of the present invention is to provide a clamp avoidance device that reduces the weight of a clamp device, simplifies the device structure, reduces the failure rate, and improves the degree of freedom of the number of clamp devices attached.
[0015]
[Means for Solving the Problems]
In order to solve the above problems, according to the present invention, as shown in FIGS. 1 to 6, (A) a workpiece W is gripped by a clamp device 13 attached via a carriage base 11 and a carriage 12, In the turret punch press that punches the workpiece W with a punch and die mounted on the turret,
(B) The clamp device 13 includes a base 34 that can be moved forward and backward and has a guide roller 37 attached to the rear portion thereof, and a clamper that is pivotally attached to the base 34 and grips the workpiece W in cooperation therewith. 33,
(C) a on the carriage base over scan 11 at a position facing the override area K, provided around drive means 42 for driving the releasing member 41 to a groove 41A is formed a freely forward and backward, the avoidance When the clamp device 13 enters the override region K, the member 41 is engaged with the guide roller 37 of the base 34 in the free state in the groove 41A with the clamper 33 of the clamp device 13 opened and the workpiece W released. A clamp avoidance device is provided that retracts the clamp device 13 from the override region K by pulling the base 34 together .
[0016]
Therefore, according to the configuration of the present invention, the avoidance driving means 42 is provided on the carriage base 11, thereby reducing the weight of the clamp device 13 and requiring air piping and electrical wiring to be attached to each clamp device 13. Therefore, the structure of the clamp avoidance device is simplified, the failure rate is reduced, and the degree of freedom of the number of clamp devices 13 is improved.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described with reference to the accompanying drawings by embodiments.
FIG. 1 is an overall view showing an embodiment of the present invention.
[0018]
The clamp device 13 shown in FIG. 1 is applied to, for example, a turret punch press (FIG. 4), and the clamp device 13 is attached via a carriage base 11 and a carriage 12.
[0019]
A guide 35 is provided in the lower part of the main body 31 of the clamping device 13, and a base 34 is slidably coupled to the guide 35 and is movable in the Y-axis direction.
[0020]
That is, at the normal time (FIG. 6 (A)), the rear stopper 34B of the base 34 is engaged with the rear end of the guide 35. At the time of avoidance (FIG. 6 (C)), the base is moved by the avoidance member 41 described later. When 34 is retracted, the base 34 moves on the guide 35 in the Y-axis direction, the rear stopper 34B leaves the rear end of the guide 35, and the front stopper 34D engages with the front end of the guide 35.
[0021]
A hole 34C is formed in the front portion of the base 34 (FIG. 1), and a lock pin 54 to be described later is inserted therein. A guide roller 37 is attached to the rear portion of the base 34, which will be described later. It can be fitted into the groove 41 </ b> A of the avoidance member 41.
[0022]
A clamper 33 that grips the workpiece W in cooperation with the base 34 is pivotally attached to the base 34 via a horizontal shaft 34 </ b> A. The clamper 33 passes through the front opening 31 </ b> A of the main body 31 and moves into the main body 31. The hook 33A is provided in the rear part.
[0023]
The body 31 incorporates a clamp driving means 38 (FIG. 1), and the clamp driving means 38 is constituted by an air cylinder with a spring 38A (FIG. 2), for example, at the tip of a piston rod 39 of the air cylinder. A cylindrical pin 39A is attached, and the hook 33A of the clamper 33 can be attached to and detached from the cylindrical pin 39A.
[0024]
That is, normally, the hook 33A of the clamper 33 is attached to the cylindrical pin 39A (FIG. 6A), the clamper 33 is closed by raising the air cylinder 38, and the workpiece W is gripped in cooperation with the base 34. It has come to do.
[0025]
However, when the clamping device 13 enters the override region K (FIG. 6B), a lock pin 54 described later is pulled out from the base 34 to make the base 34 free, and the air cylinder 38 is lowered. To bring the clamper 33 into a horizontal state.
[0026]
As a result, the workpiece W is released, and when the avoidance drive means 42 is activated and the avoidance member 41 retracts the base 34 (FIG. 6C), the hook 33A of the clamper 33 is disengaged from the cylindrical pin 39A and the rear of the main body 31. It moves to the lower part of the carriage 12 through the opening 31B.
[0027]
Accordingly, the base 34 and the clamper 33 are moved backward together and moved away from the turrets 6 and 7, so that the clamping device 13 is retracted from the override region K.
[0028]
A lock driving means 50 is attached to the front surface of the main body 31 (FIG. 1) via a bracket 51, and the lock driving means 50 is constituted by, for example, an air cylinder.
[0029]
A lock pin 54 is attached to the piston rod 52 of the air cylinder 50 via a stretch 53, and the lock pin 54 is inserted into the hole 34 </ b> C of the base 34.
[0030]
At the time of avoidance, as described above, the lock driving means 50 is operated to raise the lock pin 54 and remove it from the hole 34C (FIG. 6B), thereby bringing the base 34 into a free state.
[0031]
On the other hand, avoidance driving means 42 is provided on the carriage base 11 of a turret punch press (FIG. 4), which will be described later, at a position facing the override region K (FIG. 5) (FIGS. 1 and 2). ).
[0032]
The avoidance drive means 42 is provided, for example, in the lower part of the carriage base 11 (FIGS. 1 and 2), and is constituted by an air cylinder or a rack and pinion mechanism.
[0033]
When the avoidance drive means 42 is constituted by an air cylinder, the piston rod 43 of the air cylinder 42 is coupled to the avoidance member 41.
[0034]
The avoidance member 41 has a groove 41A, and the guide roller 37 of the base 34 can be fitted into the groove 41A. The length of the avoidance member 41 is the length of the override region K in the X-axis direction. The avoidance member 41 is slidably coupled to the guide rail 47 fixed to the carriage base 11 and is movable in the Y-axis direction.
[0035]
With this configuration, when at least the X-axis position of the clamping device 13 enters the override region K, the guide roller 37 of the base 34 is fitted in the groove 41A of the avoidance member 41 (FIG. 5). .
[0036]
When both the X-axis position and the Y-axis position of the clamp device 13 enter the override region K (FIG. 6B), the air cylinder 38 of the clamp device 13 is operated to open the clamper 33 and the workpiece. After releasing W, the avoidance member 41 with which the guide roller 37 of the base 34 is fitted is operated by the avoidance drive means 42 and the base 34 is retracted (FIG. 6C), whereby the clamping device 13 is moved. Retreat from the override area K.
[0037]
However, when only the X-axis position of the clamp device 13 enters the override region K, the guide roller 37 of the base 34 is fitted with the avoidance member 41, but only passes through the avoidance member 41.
[0038]
In addition, X-axis direction override region detection sensors 45 and 46 are attached to the front end of the guide rail 47 on which the avoidance member 41 travels via a mounting plate 44.
[0039]
The positions of the X-axis direction override area detection sensor 45 (FIG. 5) correspond to the positions of both ends of the override area K in the X-axis direction, and the other X-axis direction override area detection sensor 46 is located outside the position. It is attached.
[0040]
Further, the lower frame 17 of the turret punch press (FIG. 4) is provided with a limit switch Ly for detecting the Y-axis direction override region, and a dog 24 corresponding to the limit switch Ly for detecting the Y-axis direction override region is described later. It is attached to the bracket 16 (FIGS. 4B and 5).
[0041]
With this configuration, when both the X-axis direction override area detection sensors 45 and 46 sense and the Y-axis direction override area detection limit switch Ly is turned on, it is determined that the clamping device 13 has entered the override area K. The base 34 is pulled in by the avoidance member 41 (FIG. 6B), and the clamping device 13 is retracted from the override region K.
[0042]
FIG. 3 is a diagram showing another embodiment of the present invention.
[0043]
1 and 2 differ in that the avoidance drive means 42 is attached to the upper part of the carriage base 11.
[0044]
The avoidance drive means 42 in FIG. 3 is configured by an air cylinder or a rack and pinion mechanism.
[0045]
And when the avoidance drive means 42 is comprised with the air cylinder, the piston rod 43 of the air cylinder 42 is couple | bonded with the avoidance member 41 via the lever 49 and the connection rod 48. FIG.
[0046]
That is, the lever 49 is rotatably attached to the support shaft 49A, one end of the lever 49 is hinged to the piston rod 43, and the other end of the lever 49 is hinged to the connecting rod 48 fixed to the avoidance member 41. Are connected.
[0047]
With this configuration, the forward / backward movement of the air cylinder 42 installed on the upper side is transmitted to the avoidance member 41 installed on the lower side via the lever 49 so that the avoidance member 41 moves forward / backward. Yes.
[0048]
FIG. 4 is a view when the present invention is applied to a turret punch press. In the upper turret 6 and the lower turret 7, punches P and dies D are arranged concentrically.
[0049]
Chains 4 and 5 are wound around the rotation shaft 8 of the upper turret 6 and the rotation shaft 9 of the lower turret 7, and the chains 4 and 5 are wound around the drive shaft 3.
[0050]
A striker 2 for hitting the punch P is provided on the upper frame 1 just above the punch P in the punch center C.
[0051]
With this configuration, when the drive shaft 3 is rotated by the motor M and the chains 4 and 5 are circulated, the upper turret 6 and the lower turret 7 are rotated synchronously, and a die composed of a predetermined punch P and die D is moved to the punch center C. Can be selected.
[0052]
The lower frame 21 is provided with the limit switch Ly for detecting the Y-axis direction override region, and the dog 24 corresponding to the limit switch Ly is located on the support bracket 16 (FIG. 4B) and corresponds to the tip of the clamp device 13. Is provided.
[0053]
A Y-axis guide rail 17 is laid on the lower frame 21.
[0054]
A support bracket 16 is slidably coupled to the guide rail 17, and a carriage base 11 is fixed to the support bracket 16, and the carriage base 11 has a Y provided on the upper frame 1. The ball screw 14 of the shaft motor My is screwed.
[0055]
A carriage 12 to which the clamping device 13 is attached is slidably coupled to the carriage base 11 via an X-axis guide rail (not shown). The carriage 12 is connected to the X-axis motor Mx. The ball screw 15 is screwed.
[0056]
Further, a table 10 is fixed at the center of the turret punch press, and a carriage base 11 is disposed across the fixed table 10. Side tables 10A and 10B on both sides of the fixed table 10 are carriage bases. 11 is attached.
[0057]
With this configuration, when the X-axis motor Mx is rotated, the carriage 12 moves on the carriage base 11 in the X-axis direction, and when the Y-axis motor My is rotated, the carriage base 11 is moved to the side table 10A. Move in the Y-axis direction together with 10B.
[0058]
Accordingly, the workpiece W gripped by the clamping device 13 can be positioned at a predetermined position, and the X-axis direction override region detection sensors 45 and 46, the Y-axis direction override region detection limit switch Ly and its dog 24 (see FIG. 5) It is possible to determine whether the clamping device 13 is in or out of the override region K.
[0059]
The operation of the present invention having the above configuration will be described below.
[0060]
(1) Normal operation (FIG. 6A).
When the clamping device 13 is not in the override region K, a normal operation is performed.
[0061]
In other words, the clamper 33 is lifted by closing the air cylinder 38 as the clamp driving means 38, the workpiece W is gripped in cooperation with the base 34, and the carriage 12 and the carriage base 11 are moved to move the workpiece. Position W at a predetermined position.
[0062]
If only the X-axis position of the clamping device 13 is in the override region K but not the Y-axis position (FIG. 6A), even if the carriage 12 moves in the X-axis direction ( 5), the guide roller 37 of the base 34 simply passes through the groove 41A of the avoidance member 41, and no avoidance operation is performed.
[0063]
(2) Avoidance operation (FIGS. 6B to 6C).
[0064]
However, when the clamping device 13 enters the override region K (FIG. 6 (B)), the lock driving means 50 is operated to pull out the lock pin 54 from the base 34 to bring the base 34 into a free state. The clamp driving means 38 operates to bring the clamper 33 into a horizontal state and release the workpiece W.
[0065]
Next, when the avoidance drive means 42 is activated and the avoidance member 41 retracts the base 34 (FIG. 6C), the hook 33A of the clamper 33 is also detached from the cylindrical pin 39A, passes through the rear opening 31B, and passes through the rear opening 31B. The base 34 and the clamper 33 are moved backward together.
[0066]
As a result, the clamping device 13 moves away from the turrets 6 and 7, retreats from the override region K, and the part where the workpiece W is clamped can be processed.
[0067]
(3) Return operation (FIGS. 6D to 6E).
[0068]
Next, when the guide roller 37 of the base 34 passes through the groove 41A of the avoidance member 41 and is detected by the inner sensor 45 of the X-axis direction override region detection sensors, the return operation is started, and the outer sensor 46 is further started. When it detects, it will be in a unclamped state.
[0069]
For example, in FIG. 5, the clamping device 13 that has entered the override region K finishes the avoiding operation (FIG. 6C)), exits the override region K, and moves from right to left together with the carriage 12. The inner sensor 45 at the left end of the mounting plate 44 senses the passage of the clamping device 13.
[0070]
When the inner sensor 45 senses, when the avoidance driving means 42 attached to the carriage base 11 is operated to advance the avoidance member 41, the base 34 fitted to the avoidance member 41 via the guide roller 37. Also, it moves forward with the clamper 33, and the rear stopper 34B comes into contact with the guide 35 and stops (FIG. 6D).
[0071]
At the same time, the hook 33A of the clamper 33 is attached to the cylindrical pin 39A of the clamp driving means 38, and the lock driving means 50 is activated to insert the lock pin 54 into the hole 34C of the base 34, thereby locking the base 34 ( FIG. 6 (D)).
[0072]
Next, when the clamping device 13 further moves to the left together with the carriage 12, the outer sensor 46 senses the passage of the clamping device 13 and enters a re-clamping state.
[0073]
Accordingly, if the clamping device 13 is moved out of the override region K by moving the carriage 12 and the carriage base 11, the workpiece loaded into the turret punch press is activated by operating the clamp driving means 38. W can be gripped by the base 34 and the clamper 33 (FIG. 6E).
[0074]
【The invention's effect】
As described above, according to the present invention, the avoidance drive means is provided on the carriage base at a position facing the override area, and the clamp apparatus enters the override area and engages with the avoidance drive means. In such a case, the avoidance driving means retracts the clamping device from the override area.
[0075]
Therefore, according to the configuration of the present invention, since the avoidance driving means is provided on the carriage base, the weight of the clamping device is reduced, and it is not necessary to attach air piping or electric wiring to each clamping device. Thus, the structure of the clamp avoiding device is simplified, the failure occurrence rate is reduced, and further, the technical effect of improving the degree of freedom of the number of attached clamp devices is achieved.
[0076]
[Brief description of the drawings]
FIG. 1 is an overall view showing an embodiment of the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is a diagram showing another embodiment of the present invention.
FIG. 4 is a diagram illustrating an application example of the present invention.
FIG. 5 is a diagram showing a relationship between avoidance driving means 42 and an override region K constituting the present invention.
FIG. 6 is an operation explanatory diagram of the present invention.
FIG. 7 is an explanatory diagram of a conventional technique.
[Explanation of symbols]
5, 6 Turret 11 Carriage base 12 Carriage 13 Clamping device 31 Main body 33 Clamper 33A Hook 34 Base 35 Guide 37 Guide roller 38 Clamp driving means 39 Piston rod 39A Clamp driving means 38 Cylindrical pin 41 Avoiding member 41A Groove 42 Avoiding driving Means 43 Piston rod 44 of avoidance drive means 42 Mounting plates 45 and 46 X-axis direction override region detection sensor 47 Guide rail 50 Lock drive means

Claims (8)

In a turret punch press in which a workpiece is gripped by a carriage base and a clamping device attached via the carriage, and punching is performed on the workpiece by a punch and a die attached to the turret.
The clamp device has a base that is movable forward and backward and has a guide roller attached to the rear portion thereof, and a clamper that is pivotally attached to the base and grips a workpiece in cooperation therewith,
An avoidance drive means for driving an avoidance member that is movable forward and backward and has a groove is provided at a position on the carriage base opposite to the override area, and the avoidance member includes a clamp device that is disposed in the override area. The clamp device is retracted from the override region by opening the clamper of the clamp device and fitting the guide roller of the free base into the groove and pulling the base with the workpiece released. A clamp avoidance device characterized in that The body of the clamping device, together with the clamp drive means comprising an air cylinder is built, the tip of the piston rod of the air cylinder is attached cylindrical pin, the circular column pin and detachably clamper hooks The clamp avoidance device according to claim 1. A lock driving means comprising an air cylinder is externally attached to the body of the clamp device, and a lock pin is attached to the tip of the piston rod of the air cylinder via a stretch, and the lock pin is attached to the base. 2. The clamp avoidance device according to claim 1, wherein the clamp avoidance device is inserted into the formed hole. When the clamping device enters the override region, the lock driving means is operated to raise the piston rod, thereby removing the lock pin from the hole in the base and freeing the base. 4. The clamp avoiding device according to claim 1, wherein the work is released by opening the clamper by operating and lowering the piston rod . The avoidance member has a length equal to the length of the override region in the X-axis direction, the avoidance member is slidably coupled to a guide rail fixed to the carriage base, and is movable in the Y-axis direction. Item 2. The clamp avoidance device according to item 1.  2. The clamp according to claim 1, wherein the avoidance drive means is attached to a lower portion of the carriage base, the avoidance drive means is constituted by an air cylinder, and a piston rod of the air cylinder is coupled to the avoidance member. Avoidance device. The avoidance drive means is attached to the upper portion of the carriage base, the avoidance drive means is constituted by an air cylinder, and the piston rod of the air cylinder is attached to one end of a lever that is rotatably attached to a support shaft. 2. The clamp avoidance device according to claim 1, wherein the clamp is avoided and the other end of the lever is hinged to a connecting rod fixed to the avoidance member. The entry / exit judgment means for the override area of the clamping device is provided in the vicinity of the turret and the X-axis override area detection sensor attached to the tip of the guide rail to which the avoidance member is slidably coupled via a mounting plate. 6. The clamp avoidance device according to claim 1, comprising a limit switch for detecting an Y-axis direction override region and a dog correspondingly provided on a support bracket of the carriage base.

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