JP2010064088A - Front support of press brake - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a front support capable of reducing any trouble on works and passage without detaching it from a press brake when not in use. <P>SOLUTION: The front support has a base 2 arranged movably along a guide rail 101 of a press brake 100, and a bar-like supporting arm 41 extending in the horizontal direction from the base 2 and supporting a workpiece, and the supporting arm 41 is arranged on the base 2 rotatably in the horizontal direction around the base 2 side of the supporting arm 41. When the front support 1 is not in use, the supporting arm 41 is accommodated in the press brake 100 by arranging so that the supporting arm 41 may be rotated and become parallel to the front face of the press brake 100, and a wide space for works and passage can be ensured thereby. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a front support of a press brake that is disposed on the front side of a press brake and supports a workpiece.

A press brake is a press machine that bends a flat workpiece such as an iron plate, and a front support for supporting the workpiece is attached to the workpiece supply side, which is the front side of the machine. (For example, refer to Patent Document 1). The front support is slidably disposed on a guide rail disposed in a horizontal direction on the front surface of the press brake, and a bar-shaped arm extends forward (perpendicular to the front surface of the press brake). Then, the front support is moved along the guide rail in accordance with the width of the workpiece, the machining position, etc., and the bending is performed with the workpiece placed on and supported by the arm. .
Japanese Patent No. 3790161

  By the way, the front support may not be used depending on the size of the workpiece or the bent shape. In such a case or when the press brake itself is not used, the front support has conventionally been removed from the press brake because it interferes with and obstructs work and traffic. That is, the front support is moved to the end of the guide rail, and the front support is removed from the end and stored. However, since the front support is made of metal and heavy, it requires heavy labor for removal and reattachment. In addition, temporarily placing the front support under the floor of the front of the press brake hinders work and traffic, so a storage space for the front support had to be secured separately from the work area.

  Therefore, an object of the present invention is to provide a front support capable of reducing troubles in work and traffic without being removed from a press brake when not in use.

  In order to achieve the above object, the invention according to claim 1 is a front support of a press brake that is disposed on the front side of the press brake and supports a workpiece, and is disposed on the front side of the press brake. A base movably disposed along a guide rail extending in a horizontal direction, and a support arm extending in a horizontal direction from the base side in a bar shape and supporting a workpiece, the base side of the support arm The support arm is disposed on the base so as to be rotatable in a horizontal direction around the base.

  According to this invention, when using a front support, it arrange | positions so that a support arm may be rotated and it may extend ahead of a press brake. On the other hand, when the front support is not used, the support arm is rotated and arranged so as to be parallel to the front surface of the press brake. As a result, the support arm is housed in the press brake, and a large space for work and traffic is secured.

  According to a second aspect of the present invention, in the front support according to the first aspect, the support arm is arranged to be movable up and down with respect to the base.

  According to the present invention, when the front support is used, the support arm is moved upward to a position for supporting the workpiece, and when the front support is not used, the support arm is moved downward.

  According to a third aspect of the present invention, in the front support according to the first or second aspect, the gauge is disposed movably along the longitudinal direction of the support arm and measures a distance from a preset reference point. It is characterized by comprising.

  According to the first aspect of the present invention, since the support arm is rotatable in the horizontal direction, when the front support is not used, the support arm is positioned in parallel with the front surface of the press brake, so that work, traffic, etc. It is possible to significantly reduce the troubles. For this reason, it is not necessary to remove the front support from the press brake, it is possible to avoid heavy labor such as removal and reattachment, and it is not necessary to secure a storage place for the front support. Furthermore, depending on the shape of the workpiece, the bending shape, etc., it is possible to perform the desired bending with high accuracy and ease by bending with the support arm positioned at the desired angle. It becomes.

  According to the second aspect of the present invention, since the support arm is movable up and down with respect to the base, when the front support is not used, the support arm is moved downward to obstruct work and traffic. Can be further reduced.

  According to the third aspect of the present invention, a desired bending process can be performed with high accuracy and ease by supporting the workpiece on a predetermined position of the support arm while measuring the distance from the reference point with a gauge. Can be performed. Moreover, since the gauge is provided on the support arm, that is, the gauge is provided on the front side of the press brake, which is the workpiece supply side, the position of the workpiece can be adjusted more accurately and easily. Is possible.

  The present invention will be described below based on the illustrated embodiments.

  FIG. 1 is a perspective view showing a press brake 100 provided with a front support (hereinafter simply referred to as “front support”) 1 of a press brake according to an embodiment of the present invention, and FIG. 2 is a front view of the front support 1. FIG. 3 is a side view of the front support 1. The front support 1 is a device that is disposed on the workpiece supply side (feed side), which is the front side of the press brake 100, and supports a workpiece such as an iron plate, and mainly includes a base 2 and a shaft unit 3. And an arm unit 4.

  As shown in FIGS. 4 and 5, the base 2 mainly includes a substantially rectangular plate-like base plate 21 and two linear rails 22. A guide groove 21a having a substantially concave cross section and extending in the horizontal direction is formed on the upper rear surface side of the base plate 21, and a guide rail 101 disposed on the front surface of the press brake 100 is fitted and attached to the guide groove 21a. Has been. The guide rail 101 extends in the horizontal direction, and the base 2 can move and slide in the horizontal direction along the guide rail 101. As the guide groove 21a and the guide rail 101 are fitted in this way, the base 2 is slidable along the guide rail 101. However, the cam floor is placed on the base plate 21 so as to sandwich the guide rail 101 from above and below. The base 2 may be slidable.

  A rectangular escape hole 21b is formed in the central portion of the base plate 21, the base plate 21 is lightened, and a gas spring 36 described later is disposed in the escape hole 21b. A first screw hole 21c is formed on the upper right side of the base plate 21, and a set bolt 23 is screwed into the first screw hole 21c. Then, by tightening the set bolt 23, the tip thereof hits the front surface of the press brake 100, the base 2 is fixed to the press brake 100, and the base 2 can move along the guide rail 101 by loosening the set bolt 23. It has become.

  Further, a second screw hole 21 d is formed on the upper left side of the base plate 21, and a third screw hole 21 e is formed in the left center portion of the base plate 21. Then, as will be described later, a T-bolt 37 is screwed into the second screw hole 21d in a state where the shaft unit 3 is positioned above the base 2 (a rod 361 described later is positioned at the top dead center). By combining, the shaft unit 3 is fixed upward. On the other hand, when the shaft unit 3 is positioned below the base 2 (the rod 361 is positioned at the bottom dead center), the T-bolt 37 is screwed into the third screw hole 21e, so that the shaft unit 3 is It is fixed at the bottom. Here, in the state where the shaft unit 3 is positioned upward, the position of the second screw hole 21d is set so that the upper surface of the support arm 41 described later is positioned near the upper surface of the die 102 of the press brake 100. Yes. In FIG. 1, reference numeral 103 denotes a punch that performs bending in cooperation with the die 102.

  Two linear rails 22 extending vertically are attached in parallel to the surface side of the base plate 21, and a rail receiver 31 a of the shaft unit 3 described later is fitted and mounted on the linear rail 22.

  As shown in FIGS. 6 and 7, the shaft unit 3 has two rail receivers 31a formed in parallel on the back side of a substantially rectangular plate-like slide plate 31 and having a concave section (groove shape) and extending vertically. Yes. The linear rail 22 of the base 2 is fitted and mounted on the rail receiver 31a so that the shaft unit 3 can move and slide in the vertical direction with respect to the base 2.

  Two bearings 32 (see FIG. 8) are coaxially mounted on the surface side of the slide plate 31, and a rotary shaft 33 is rotatably supported by the bearings 32 so as to extend vertically. A rotation stop 34 is attached to the slide plate 31 above the bearing 32 positioned above. As shown in FIG. 9, the rotation stopper 34 has a block shape, and an insertion hole 34a for inserting the rotation shaft 33 is formed at the center, and further, a slit 34b penetrating from the outer edge to the insertion hole 34a is formed. Then, by tightening the rotation stop bolt 341 in the screw hole 34c, the slit 34b is narrowed to prevent the rotation of the rotation shaft 33, and by loosening the rotation stop bolt 341, the slit 34b is expanded and the rotation shaft 33 can be rotated. It comes to become.

  An angle adjustment unit 35 is disposed near the center of the rotation shaft 33. As shown in FIG. 10, the angle adjustment unit 35 includes a stopper ring 351, bolt supports 352 and 353, and adjustment bolts 354 and 355. The stopper ring 351 is attached to the central portion of the rotary shaft 33, and has an annular ring portion 351a that extends around the entire circumference of the rotary shaft 33, and is formed on the upper surface side of the ring portion 351a. A stopper upper portion 351b extending 90 degrees) and a stopper lower portion 351c formed on the lower surface side of the ring portion 351a and extending to ¼ of the entire circumference of the rotating shaft 33 are configured. The stopper upper portion 351b and the stopper lower portion 351c are formed symmetrically about the rotation shaft 33.

  The bolt supports 352 and 353 are both L-shaped, and are attached to the slide plate 31 so that the first bolt support 352 faces the stopper upper portion 351b and the second bolt support 353 faces the stopper lower portion 351c. ing. The first adjustment bolt 354 is screwed into the vertical portion 352a of the first bolt support 352, and the second adjustment bolt 355 is screwed into the vertical portion 353a of the second bolt support 353. Yes. Then, when the stopper surface 351d of the stopper upper portion 351b hits the tip of the first adjustment bolt 354, the clockwise rotation of the rotating shaft 33 is restricted, and the stopper surface 351e of the stopper lower portion 351c becomes the tip of the second adjustment bolt 355. The counterclockwise rotation of the rotary shaft 33 is restricted by hitting the above.

  Further, the positions of the stopper surfaces 351d and 351e and the adjusting bolts 354 and 355 are set so that the rotary shaft 33 can reciprocate by 90 degrees. That is, as shown in FIG. 10, when the upper stopper surface 351 d is in contact with the first adjustment bolt 354, the support arm 41 described later extends perpendicularly to the front surface of the press brake 100. When the rotating shaft 33 is rotated 90 degrees counterclockwise from this state, the lower stopper surface 351e hits the second adjustment bolt 355 and stops rotating, so that the support arm 41 is parallel to the front surface of the press brake 100. It has become.

  In addition, an insertion hole 31 b for inserting a threaded portion of the T-bolt 37 is formed on the upper left side of the slide plate 31. A gas spring 36 is attached to the back side of the slide plate 31 so as to extend in the vertical direction. The gas spring 36 is a spring in which nitrogen gas is sealed in a cylinder and uses a repulsive force generated by compression of the nitrogen gas, and the tip of the rod 361 is fixed to the bottom surface 21 f of the base plate 21 of the base 2. Yes. When the rod 361 is extended (see FIG. 2), the shaft unit 3 is positioned above the base 2, and the rod 361 is contracted (retracted) by pushing down the shaft unit 3 against the repulsive force of nitrogen gas. ), The shaft unit 3 is positioned below the base 2 (see FIG. 13).

  As shown in FIGS. 11 and 12, the arm unit 4 mainly includes a support arm 41 and a gauge body 42. The support arm 41 is a rod-like member that extends in the horizontal direction from the base 2 and supports the workpiece. That is, a rod body having a substantially square cross section, and a cylindrical shaft support tube 43 is attached to the left end portion side of the lower surface, that is, the base 2 (shaft unit 3) side, and the upper end of the rotating shaft 33 is installed in the shaft support tube 43. The part is inserted and fixed. On the other hand, one end portion of the support bar 44 is connected to the right end portion side of the lower surface, and the other end portion of the support bar 44 is connected to the lower end portion of the rotating shaft 33 via the connection bar 45. In this way, the support arm 41 is attached to the rotation shaft 33 and is disposed on the base 2 via the shaft unit 3 so as to be rotatable in the horizontal direction around the axis of the rotation shaft 33. Further, the support unit 41 is moved up and down with respect to the base 2 by moving the shaft unit 3 up and down with respect to the base 2 as described above.

  As described above, when the base 2 moves along the guide rail 101, the support arm 41 moves in the horizontal direction, and when the shaft unit 3 moves along the linear rail 22, the support arm 41 moves in the vertical direction. Further, the support shaft 41 is rotated by rotating the rotary shaft 33. That is, the support arm 41 can move in the horizontal direction and the vertical direction and can rotate in the horizontal direction.

  A plurality of free bears (spheres) 411 are disposed on the upper surface side of the support arm 41 along the longitudinal direction of the support arm 41, and a rail-shaped gauge extending in the longitudinal direction (horizontal direction) is provided on one side surface. A guide 412 is provided.

  The gauge body 42 is configured by connecting a gauge 421 and a gauge block 422, and a guide groove (not shown) having a substantially concave cross section and extending in the horizontal direction is formed on both rear surfaces. A gauge guide 412 is fitted and attached to the guide groove, and the gauge body 42 is movable along the gauge guide 412. The gauge 421 is a measuring instrument that measures a distance from a preset reference point. In this embodiment, when the reference point button is pressed at a certain position, that position becomes the reference point, and when the gauge 421 is moved thereafter, the reference is made. The distance from the point is measured, and the measurement result is displayed on the liquid crystal display unit. Specifically, it is composed of a digital scale provided with a capacitance type detector.

  The gauge block 422 is provided with a positioning pin 422a so as to protrude from the upper surface thereof. For example, the position of the edge of the workpiece (reference point) is obtained by applying the edge of the workpiece to the positioning pin 422a. The distance between the workpiece and the edge of the workpiece can be set at a desired position. Further, the gauge block 422 is provided with a lock (not shown), and the gauge body 42 is fixed on the gauge guide 412 by operating the lock.

  Next, a method of using the front support 1 having such a configuration will be described.

  First, when bending the workpiece using the front support 1, the T-bolt 37 is fastened to the second screw hole 21 d of the base 2 with the shaft unit 3 positioned on the upper side of the base 2. Thereby, the height positions of the shaft unit 3 and the arm unit 4 are fixed. Next, as described above, the arm unit 4 and the rotating shaft 33 are rotated, and the stopper surface 351d on the upper portion of the stopper ring 351 is rotated in a state where it contacts the first adjustment bolt 354 (see FIGS. 6 and 10). The stop bolt 341 is tightened to prevent the rotation shaft 33 from rotating. As a result, as shown in FIG. 3, the support arm 41 extends perpendicularly to the front surface of the press brake 100.

  In this state, the workpiece W is placed on the upper surface of the support arm 41, and the press brake 100 is operated to perform bending. At this time, for example, the gauge body 42 is moved to a predetermined position while looking at the processed drawing, and the bending process is performed while the edge of the workpiece W is applied to the positioning pin 422a, so that the bending process at the correct position can be performed. Easy to do. Further, by changing the angle of the support arm 41 with respect to the front surface of the press brake 100 within a range in which the rotary shaft 33 can rotate, the bending process according to the shape or bending shape of the workpiece W can be performed with high accuracy and easily. Can be done.

  Next, when the front support 1 is not used, the rotation stop bolt 341 is loosened, and the arm unit 4 and the rotation shaft 33 are rotated until the stopper surface 351e below the stopper ring 351 contacts the second adjustment bolt 355. Then, the rotation-stop bolt 341 is tightened. As a result, as shown in FIG. 2, the support arm 41 extends in parallel to the front surface of the press brake 100, and the support arm 41 is accommodated in the press brake 100, so that a space for work and traffic is widened. Secured. Further, when it is desired to secure more space near the die 102 of the press brake 100, the support arm 41 is positioned below. That is, the T-bolt 37 is loosened, and the shaft unit 3 and the arm unit 4 are pushed down as shown in FIG. 13, and the T-bolt 37 is tightened in the third screw hole 21 e of the base 2.

  When bending using the front support 1 again, when the gas spring 36 is operated by loosening the T-bolt 37, the rod 361 extends and the shaft unit 3 and the arm unit 4 are pushed upward. Next, the support arm 41 is extended perpendicularly to the front surface of the press brake 100 in the same manner as described above, and the front support 1 is moved to a desired position along the guide rail 101. Then, the fastening bolt 23 is tightened to fix the front support 1 to the press brake 100, and bending is performed.

  As described above, according to the front support 1, since the arm unit 4 is rotatable, the support arm 41 is rotated and positioned parallel to the front surface of the press brake 100, thereby preventing troubles in work and traffic. It can be significantly reduced. Furthermore, since the arm unit 4 is movable in the vertical direction, it is possible to further reduce troubles for work and traffic by moving the support arm 4 downward. As described above, since it is possible to reduce obstacles to work and traffic by simply rotating and moving the arm unit 4, it is not necessary to remove the front support 1 from the press brake 100 as in the prior art. As a result, heavy labor such as removal and reattachment can be avoided, and it is not necessary to secure a storage place for the front support 1.

  Further, since the support arm 41 is provided with the gauge body 42, for example, the desired bending process can be performed with high accuracy by performing the bending process by applying the edge of the workpiece to the positioning pin 422a as described above. And it becomes possible to carry out easily. Moreover, since the gauge body 42 is provided on the support arm 41 located on the workpiece supply side (the front side of the press brake 100), the position adjustment of the workpiece can be performed with higher accuracy and ease. It becomes possible. That is, in the conventional press brake, a gauge (back gauge) is provided on the outlet side of the workpiece, that is, on the back side of the press brake. However, since such a back gauge is provided on the back side of the press brake, there are cases where the movable range is narrow and it is not possible to cope with various workpieces and bending shapes. Furthermore, it is not easy to position the edge of the workpiece in accordance with the back gauge on the back side of the press brake, and as a result, accurate bending is difficult. On the other hand, in the gauge body 42 of this embodiment, since the position adjustment of the workpiece can be easily performed with high accuracy as described above, the desired bending process can be performed with high accuracy and easily. It becomes possible.

  Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, and even if there is a design change or the like without departing from the gist of the present invention, Included in the invention. For example, in the gauge body 42 of the above-described embodiment, the distance can be measured using an arbitrary position as a reference point. However, the reference point is fixed, for example, as one end of the support arm 41, and the distance from the reference point is set. The distance may be measured. Further, although the arm unit 4 rotates together with the rotation shaft 33, the arm unit 4 may rotate around the rotation shaft 33 without rotating the rotation shaft 33. In this case, a mechanism for the rotation stop 34 or the like may be provided in the shaft support tube 43 to prevent or release the rotation of the arm unit 4. Furthermore, the rotary shaft 33 and the support arm 41 can be reciprocally rotated by 90 degrees, but the rotatable range can be set according to the size and bending shape of the workpiece, the accommodation position of the support arm 41, etc. Or you may enable it to rotate 360 degree | times.

1 is a perspective view of a press brake provided with a front support according to an embodiment of the present invention. It is a front view which shows the state which extended the support arm of the front support of FIG. 1 in parallel with respect to the front surface of a press brake. It is a side view which shows the state which extended the support arm of the front support of FIG. 1 perpendicularly | vertically with respect to the front surface of a press brake. It is a front view of the base of the front support of FIG. It is a left view of the base of FIG. It is a front view of the shaft unit of the front support of FIG. FIG. 7 is a left side view of the shaft unit of FIG. 6. It is the figure which looked at the bearing of the shaft unit of FIG. 6 from the AA direction. It is the figure which looked at the rotation stop of the shaft unit of FIG. 6 from the BB direction. It is the front view (a) and top view (b) of the angle adjustment unit of the shaft unit of FIG. It is a front view of the arm unit of the front support of FIG. It is a top view of the arm unit of FIG. It is a front view which shows the state which pushed down the axis | shaft unit and the arm unit from the state of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front support 2 Base 21 Base plate 22 Linear rail 23 Set bolt 3 Axis unit 31 Slide plate 32 Bearing 33 Rotating shaft 34 Rotation stop 341 Rotation stop bolt 35 Angle adjustment unit 36 Gas spring 37 T-bolt 4 Arm unit 41 Support arm 412 Gauge guide 42 Gauge body 421 Gauge 422 Gauge block 422a Positioning pin 100 Press brake 101 Guide rail W Work material

Claims (3)

A front support of a press brake that is disposed on the front side of the press brake and supports a workpiece,
A base that is movably disposed along a horizontally extending guide rail disposed on the front side of the press brake, and a support arm that extends in the horizontal direction from the base side and supports a workpiece in a bar shape. Prepared,
A front support for a press brake, wherein the support arm is disposed on the base so as to be rotatable in a horizontal direction around the base side of the support arm.   The front support for a press brake according to claim 1, wherein the support arm is disposed so as to be movable up and down with respect to the base. 3. The gauge according to claim 1, further comprising a gauge that is movably disposed along a longitudinal direction of the support arm and that measures a distance from a preset reference point. 4. Front support for press brakes.