JPH0713848Y2 - Work clamp release device for panel vendor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a work clamp release device for a panel bender that bends a plate-shaped work at an arbitrary angle.

[Conventional technology]

Conventionally, as a panel bender for bending a predetermined portion of a plate-shaped work at an arbitrary angle, for example, one disclosed in Japanese Utility Model Laid-Open No. 63-138917 is known.

The one described in the above publication is provided with an ammunition that raises the lifting frame when the lifting operation device that moves the bending frame up and down is at rest. This allows the work to be released, so that the work can be repositioned. The adjustment of the amount of elevation of the elevating frame is made with a plurality of adjusting nuts.

[Problems to be solved by the device]

However, in the above-mentioned conventional panel bender, the entire lifting frame, which is a heavy object, is urged upward by an ammunition machine such as urethane rubber, so the lifting frame is greatly lifted by the ammunition and the work is slightly released. There is a problem that the operation to perform is difficult and the operation becomes unstable.

Also, since the adjustment of the amount of elevation of the lifting frame is performed with multiple adjustment nuts, it takes a long time to make fine adjustments to these adjustment nuts uniformly, resulting in poor work efficiency. If it is loosened, the adjustment position will shift, so there is a problem that it must be readjusted.

Further, in the above-mentioned conventional panel bender, since the elevating frame is always urged upward by the ammunition machine, the fluid pressure cylinder that vertically moves the elevating frame must overcome the urging force of the ammunition machine to lower the elevating frame. In addition, a larger fluid pressure cylinder is required, and since these fluid pressure cylinders are installed on the upper part of the main body, high rigidity is also required on the main body side that supports them, and the entire machine is large and There was a problem that it became heavy.

The present invention has been made for the purpose of remedying the above-mentioned problems, and an object thereof is to provide a work clamp release device for a panel bender which enables a slight release of the clamp die.

[Means and Actions for Solving the Problems]

In order to achieve the above-mentioned object, this invention clamps a work between a pressing die that is vertically moved by a work pressing cylinder and a receiving die that is fixed to the bed side of the main body, and supports a spindle by a vertical bending drive device. In a panel bender for bending the work with a downward bending die and an upward bending die provided on a rotating arm that is rotated around the A stopper pin that can move forward and backward is provided, and the inclined surface provided at the tip of this stopper pin is brought into contact with the locking pin to regulate the lifting of the presser die, thereby creating a slight gap between the presser die and the receiving die. (EN) A work clamp release device for a panel bender which allows the work to be repositioned easily and surely.

〔Example〕

 An embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, 1 is the body of the panel bender, in which a plurality of work holding cylinders 2 are mounted on the upper portion of the C frame 1a at equal intervals in the width direction, and pistons projecting downward from these work holding cylinders 2 The upper part of the elevating member 3 is attached to the tip of the rod 2a.

A presser die 4 is attached to the lower part of the elevating member 3, and a receiving die 5 attached to the bed 1b of the main body 1 is provided below the presser die 4. The bent portion of the work A to be bent is sandwiched between the five.

Further, 6 is a work retainer releasing device that locks the elevating member 3 in the lowered position and releases it when repositioning, and 7 has a base end supported by a slider 8a of a gap adjusting device 8 via a support shaft 8b. A rotating arm, 9 is a support shaft on the tip side of the rotating arm 7.
It is a vertical bending drive device that moves up and down around 8b.

As shown in FIG. 2, the work clamp release device 6 has a plurality of locking pins 6a planted on the upper part of the elevating member 3. The tip side of each locking pin 6a is projected rearward, and an inclined surface 6b is formed at the tip, and a stopper pin 6c installed behind the locking pin 6a is locked to this inclined surface 6b. You can do it.

The stopper pin 6c is movably supported in the front-rear direction of the main body 1, and an inclined surface 6d that abuts the inclined surface 6b of the locking pin 6a is formed at the tip end of the stopper pin 6c.
An operating cylinder 6e is connected to the rear end of 6c, and the stopper pin 6c is moved back and forth in the direction of the locking pin 6a by the operating cylinder 6e.

Further, the tip end side of the rotating arm 7 is vertically branched, and a lower bending die 10 is formed in the upper branch portion 7a so that the tip portion is directed obliquely downward, and in the lower branch portion 7b. ,
Upper bending dies 11 each having a tip end directed obliquely upward are attached, and the work A is provided between the lower bending dies 10 or the upper bending dies 11 and the pressing die 4 and the receiving die 5.
Can be bent at a predetermined angle.

On the other hand, in the gap adjusting device 8, sliders 8a, which are guided by guide rails 8c laid in the front-rear direction of the main body 1 and are movable in the front-rear direction, are provided on the left and right sides of the main body 1, and protrude from the sliders 8a. The base end of the rotating arm 7 is supported on the supporting shaft 8b as shown in FIG.

Each of the sliders 8a is biased rearward by a biasing means 8d such as a compression spring provided on the front side, and inclined surfaces 8e are formed in the rear portion of the slider 8a, and these inclined surfaces 8e are wedge members. It is in contact with 8f.

The wedge members 8f are movably supported in the left-right direction of the main body 1 as shown in FIG.
One end side of the ball screw shaft 8g, which is a reverse screw, is screwed into each. The other end of each ball screw shaft 8g is connected by a joint 8h, and one ball screw shaft 8g and a drive motor 8i are linked by an endless belt 8j. By rotating 8g at the same time, each wedge member 8f can be moved in the contacting / separating direction.

Further, the vertical bending drive device 9 has two sets of screw jacks 9a spaced apart from each other on the upper part of the main body 1 and a drive shaft 9b protruding downward from the screw jacks 9a.
The upper end on the tip side of the rotating arm 7 is pivotally attached to the lower end of the rotary arm 7 via a pin 9h.

The input shaft 9c of the screw jack 9a is connected to the output shaft 9e of the speed reducer 9d provided between the screw jacks 9a, and the vertical drive motor 9g is connected to the input shaft 9f of the speed reducer 9d. The vertical drive motor 9g vertically moves the tip end side of the rotary arm 7 through the screw jack 9a about the support shaft 8b.

On the other hand, the main body 1 is mounted on guide rails 12a protruding from the upper surface of the slide base 12, and can be moved back and forth along these guide rails 12a. A front-back drive motor 13a of the feeding device 13 is provided.

A feed screw shaft 13b is connected to the front-rear drive motor 13a so that the feed screw shaft 13b can be rotated, and a nut member 13c provided on the bottom of the main body 1 is screwed on the feed screw shaft 13b. The main body 1 is moved back and forth by the rotation of the feed screw shaft 13b.

Further, in front of the main body 1, there are provided a conveyor 16 for carrying in the work A to be bent, and a work clamp device 15 for fixing the work A at a processing position. Back gauges 17 that are brought into contact with and are used to position the bending position are installed.

In the back gauge device 17, as shown in FIGS. 7 and 8, a back gauge 17b is screwed to the tip of an axial rod 17a supported movably in the horizontal direction.

The base end side of the shaft rod 17a is projected toward the moving table 17c,
A slide 17d movably provided in the left-right direction on the moving table 17c and a touch sensor 17e face each other.

The moving table 17c is movably supported in the front-rear direction of the main body 1, and a nut member 17f provided at the lower portion is screwed to a ball screw shaft 17h rotated by a back gauge drive motor 17g. The back gauge 17b can be moved and adjusted in the front-back direction of the main body 1 by a gauge drive motor 17g.

Next, the operation will be described. The work A to be bent is carried in by the conveyor 16 from the direction of the arrow B shown in FIG. 1 and stopped at the processing position by one of the stoppers 20c of the stopper device 20.

Feed screw shaft 1 by front-rear drive motor 13a of front-rear feeder 13
3b is rotated and the main body 1 is positioned to the work A side.
When two parts of the work A are bent at the same time, the main body 1 provided at the opposing position is simultaneously positioned on the work A side.

When the work A is stopped at the processing position and the end portion of the work A comes in contact with the back gauge 17b of the back gauge device 17 provided in the main body 1, the touch sensor 17e is operated via the rod 17a, A is stopped at that position, and the positioning of the bending position is completed.

After that, the movable clamp 15b is lowered by the clamp cylinder 15a of the work clamp device 15, and the work A is fixed between the fixed clamp 15c provided between the conveyor belts 16e of the conveyor 16 and the movable clamp 15b.

Next, when the positioning of the bending position is completed, the work holding cylinder 2 lowers the elevating member 3, and the work A is clamped between the holding die 4 and the receiving die 5 attached to the elevating member 3.

When the work A is bent upward in this state, the turning arm 7 is turned upward about the support shaft 8b by the up-and-down bending driving device 9, and the upward bending die 11 attached to the turning arm 7 is rotated.
As a result, the end portion of the work A sandwiched between the pressing die 4 and the receiving die 5 is pushed upward, and upward bending is performed.

The locus of the upward bending die 11 during upward bending is shown in FIG.

At this time, the bending angle can be arbitrarily adjusted by adjusting the moving amount of the rotating arm 7.

On the other hand, when the first bending of the work A is completed and the next bending portion is continuously bent, the stopper pin 6c is moved forward by the operating cylinder 6e. And in this state the presser die 4
When raised, the locking pin is
Since the inclined surface 6b of 6a is brought into contact with the presser die 4 and its rise is restricted, a slight gap is generated between the presser die 4 and the receiving die 5 to release the work A, as shown in FIG. Therefore, the main body 1 is moved in this state to position the next bent portion.

When the positioning of the main body 1 is completed, the elevating member 3 is lowered again to clamp the work A between the pressing die 4 and the receiving die 5, and in this state, the rotating arm 7 is rotated upward or downward, It becomes possible to continuously bend the points.

[Effect of device]

As described in detail above, this invention provides a stopper pin which is movable up and down by the working cylinder in the vicinity of the lifting member which is vertically moved by the work holding cylinder, and the inclined surface of the stopper pin raises the lifting member. Compared to the one using a conventional ammunition, the presser die does not rise significantly, which makes it possible to reposition the workpiece in a short time when continuously bending. The productivity can be improved by shortening the cycle time. Further, since the inclined surface formed at the tip of the stopper pin is brought into contact with the locking pin provided on the lifting member side to mechanically restrict the lifting of the lifting member, the positional relationship between the stopper pin and the locking pin is preset. By adjusting the, the subsequent adjustment is hardly necessary, and unlike the conventional adjust nut, it does not loosen due to vibration during work and the adjustment position does not shift, so it takes a long time to readjust. Problems can also be resolved.

Moreover, since the work holding cylinder only needs to move up and down the lifting member and the pressing die, a smaller cylinder can be used compared to the conventional one that overcomes the urging force of the ammunition and lowers the lifting frame. Since the rigidity may be small, the size and weight of the entire machine can be reduced.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is an overall perspective view, FIG. 2 is a cross-sectional view near the work holding device, and FIG.
The figure shows a side view of a part of the vertical bending drive, a part of which is cut away, FIG. 4 is a sectional view taken along line IV-IV in FIG. 3, FIG. 5 is a lateral sectional view of the gap adjusting device, and FIG. FIG. 7 is a partially cutaway side view of the back gauge device, FIG. 8 is an enlarged sectional view of the same, and FIGS. 9 and 10 are operation explanatory views. 1 is a main body, 1b is a bed, 2 is a work holding cylinder, 3 is a lifting member, 4 is a holding die, 5 is a receiving die, 6a is a locking pin, 6c
Is a stopper pin, 6d is an inclined surface, 6e is an operating cylinder, 7 is a rotating arm, 8b is a spindle, 9 is a vertical bending drive device, 10 is a downward bending die, 11 is an upward bending die, and A is a work.

Claims (1)

[Scope of utility model registration request] 1. A pressing die 4 which is vertically moved by a work pressing cylinder 2 and a receiving die 5 which is fixed to a bed 1b side of a main body 1.
The work A is sandwiched between the two, and the work A is bent by the lower bending die 10 and the upper bending die 11 provided on the pivot arm 7 which is pivoted around the support shaft 8b by the vertical bending drive device 9. In a panel bender to be processed, a stopper pin 6c that can be moved back and forth toward the elevating member 3 by an operating cylinder 6e is provided near the elevating member 3 to which the pressing die 4 is attached, and an inclined surface provided at the tip of this stopper pin 6c. The work clamp release of the panel bender in which 6d is brought into contact with the locking pin 6a provided on the elevating member 3 to restrict the lifting of the presser die 4 to form a gap between the presser die 4 and the receiving die 5. apparatus.