JPH08215762A - Sheet metal working machine - Google Patents

Abstract

PURPOSE: To make it possible to correct the curving of a long-sized sheet metal to be worked by its own weight at the time of bending this sheet metal to be worked over the entire length in its longitudinal direction and to forcibly curvilinearly form the sheet metal to be worked at a desired curvature as special working. CONSTITUTION: Holding units 10 having a pair of upper and lower holding members 11, 12 are mounted at the front side ends of a mounting base. The sheet metal Ζ to be worked is moved successively transversely by a sheet metal feed mechanism 3 in the state of folding one end of the sheet metal Ζ held with these holding units 10 by an operation mechanism for turning in arc, thereby the sheet metal to be worked is successively folded. Upward pressing devices 60A capable of pressing the sheet metal Ζ to be worked upper than the height of holding the sheet metal by the holding units 10 from the rear surface side of the sheet metal Ζto be worked at the position apart in the sheet metal feed direction from the position where the sheet metal is held by the holding units 10 so that the deformation by the deflection of the sheet metal Ζto be worked by its own weight is corrected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet metal working machine capable of bending a long sheet metal over its entire length.

[0002]

2. Description of the Related Art A sheet metal working machine for bending a long sheet metal is known as shown in FIGS. 11 and 12 (Japanese Patent Laid-Open No. 6-262457). The machine has a width of about 50 to 100 mm and a length of 1
Work sheet metal Z consisting of a long flat plate that exceeds 0 m
Is suitable for linearly bending over the entire length in the longitudinal direction, for example, in the case of processing into a gutter used for eaves. The known sheet metal working machine shown in FIGS. 11 and 12 includes a movable unit 2 having a pair of upper and lower clamping members 11 and 12, a rotation driving device 4 for rotating the clamping members 11 and 12 in mutually opposite directions, and An arc rotation operating mechanism 5 for rotating the movable unit 2 up and down is provided.

The movable unit 2 has a pair of upper and lower holding members 11 and 12 attached to the front end portions of the upper and lower horizontal frames 22 and 23 of a mounting base 21 formed in a U-shape in side view. The upper and lower clamping members 11 and 12 each have a disc shape. Further, there is a pair of left and right sandwiching units 10 including upper and lower sandwiching members 11 and 12.

The rotary driving device 4 rotates the upper and lower holding members 11 and 12 in directions opposite to each other by a motor 41 via various power transmission devices, and the sheet metal Z sandwiched between the both holding members is rotated. It can be moved in the length direction (in FIG. 11, the horizontal direction is a horizontal orthogonal direction).
The motor 41 is reversibly operated, and the work sheet metal Z can be reciprocated horizontally by reversibly rotating the upper and lower holding members 11 and 12 respectively.

On the front surface of the lower holding member 12, there is provided a support base 6 for supporting the lower surface of one side of the sheet metal Z to be processed when the sheet metal is bent. A disk blade 81 that performs a shearing action in cooperation with the upper holding member 11 when cutting the sheet metal Z to be processed is provided on the support base 6 side. The disc blade 81 is rotated by the motor 83 in the direction opposite to that of the upper holding member 11.

The arc rotation operation mechanism 5 extends and contracts the telescopic cylinder 51 so that the entire movable unit 2 can be vertically arc-rotated around the tip end of the sheet metal holding portion of the upper holding member 11 as a center P. Has become. That is, by sequentially reducing the telescopic cylinder 51 from the extended state, the movable unit 2 is caused to arc upward with respect to the base 1 via the link device 52, for example, as shown by reference numeral 2 '. I have. The movable unit 2 has an angle of about 90 °.
When the sheet metal is bent, the sheet metal is bent several times at a predetermined angle (for example, about 15 °).

In order to bend a long sheet metal Z using a known sheet metal processing machine shown in FIGS. 11 and 12, the movable unit 2 is turned by a predetermined angle ( In the state where the upper and lower holding members 11 and 12 are rotated by the arc drive only by about 15 ° and the rotation driving device 4 rotates, one longitudinal end of the sheet metal Z to be processed is placed between the upper and lower holding members 11 and 12. insert. Then, the sheet metal Z is bent over its entire length while being moved in the depth direction (left direction in FIG. 12), and then the movable unit 2 is further rotated by the arc rotation operation mechanism 5 (for example, by arc rotation). Angle 30 from the beginning
After making an arc rotation of about a degree), the motor 41 is rotated in the reverse direction to move the sheet metal Z to be processed in the front direction (to the right in FIG. 12). The sheet metal Z to be processed is sequentially bent by a predetermined angle (for example, an angle of 90 °) over the entire length in the same manner. As described above, in this known sheet metal working machine, the long work sheet metal Z can be bent while moving it back and forth, and can be used to bend a long object with a relatively small size. .
In order to cut the sheet metal Z to be processed, the upper and lower holding members 11,
In the state where 12 is maintained in the vertical posture (the movable unit 2 is maintained in the state shown by the solid line in FIG. 11), the disc blade 81 for cutting
Is moved upward to shear the sheet metal Z to be processed by the disc blade 81 and the upper holding member 11.

[0008]

By the way, in the above-mentioned known sheet metal working machine, when the long sheet metal Z is bent, the sheet metal Z is clamped by the upper and lower clamping members 11, 12. When the sheet metal Z to be processed is moved forward as shown in FIG. 12, the front side Zd of the sheet metal Z to be processed is bent downward by its own weight so that the sheet metal Z to be processed is moved forward. By forming the fold line,
The sheet metal Z to be processed is formed while being curved. Thus, in this known sheet metal processing machine, when the sheet metal to be processed is bent in a gutter shape as shown in FIG. 13, for example, the sheet metal Z to be processed is lengthwise as shown in a solid line in FIG. However, there is a problem that it is difficult to bend and form the sheet metal to be processed in the straight line state indicated by the reference symbol Z '. The amount of bending (curvature) at the time of bending the sheet metal to be processed changes depending on the thickness and length of the sheet metal. In addition, as a special processing shape, there is a case where it is desired to forcibly bend a sheet metal to be processed at a desired curvature. In this case, in the above-described known sheet metal processing machine, only a constant curvature due to its own weight of the sheet metal to be processed is used. It could not be curved, and the sheet metal to be processed could not be formed at a desired curvature.

In view of the above-mentioned problems of the known sheet metal working machine, the present invention is such that when a long sheet metal sheet is bent over its entire length in the longitudinal direction, the sheet metal sheet is bent by its own weight. It is an object of the present invention to provide a sheet metal working machine capable of compensating for the above, and forcibly bending and shaping a sheet metal to be processed with a desired curvature as a special processing.

[0010]

Means for Solving the Problems The present invention has the following structural features as means for solving the above problems.

First, the sheet metal working machine according to the first aspect of the present invention is provided with a base, a mounting base mounted to be rotatable up and down with respect to the base, and a front end of the mounting base. And a pair of upper and lower clamping members having a pair of upper and lower clamping members each having a circular outer peripheral surface, and rotating the pair of upper and lower clamping members in directions opposite to each other. A sheet metal provided with a rotary driving device and configured to sequentially move the work piece sandwiched between the two holding members in a lateral direction by rotating the two holding members in opposite directions by the rotary drive device; A feed mechanism, and an arc rotation operation mechanism that causes the holding unit to make an arc rotation in the circumferential direction with respect to the sheet metal feeding direction around a sheet metal holding portion formed by the pair of upper and lower holding members;
A clamping portion of the sheet metal to be processed by the clamping unit at the time of the bending operation of the sheet metal to be processed is provided with a support base for supporting an outer portion in a width direction, and the sheet metal feeding is performed from a sheet metal clamping position by the pair of upper and lower clamping members. An upward pressing device capable of pressing the sheet metal to be processed upward from the lower surface side of the processed sheet metal to a position higher than the sheet metal clamping height by the clamping unit is attached to a position separated in the direction, and furthermore, the installation height of the upward pressing device is set to the position. It can be changed up and down by changing means.

The mounting base is for mounting the clamping unit. The mounting base connects the upper horizontal frame, the lower horizontal frame, and the upper horizontal frame and the lower horizontal frame on their rear sides. It is good to form in side view U shape which has a vertical frame. It is preferable that a space for accommodating one end side of the sheet metal to be processed held by the holding unit is formed in a portion surrounded by the upper horizontal frame, the lower horizontal frame, and the vertical frame.

The holding unit has a pair of upper and lower holding members each having a circular outer peripheral surface. The sandwiching members are attached to the upper horizontal frame and the lower horizontal frame of the mounting base at the front end portions thereof in close proximity to each other. Further, a plurality of sets of the sandwiching unit composed of the pair of upper and lower sandwiching members may be installed on the left and right.

The sheet metal feeding mechanism has a rotation drive device for rotating the upper and lower holding members in mutually opposite directions. The sheet metal feed mechanism can move the sheet metal to be processed sandwiched between the two holding members in the lateral direction by rotating the upper and lower holding members in opposite directions by the rotation driving device. . The rotary drive device may be of a manual type using a handle, but is preferably an electric type using a motor.

The arc-rotating operation mechanism can rotate the clamping unit in a circumferential direction with respect to a sheet-metal feeding direction of the clamping unit around a sheet-metal clamping portion formed by the upper and lower clamping members. The arc rotation operation mechanism may be of a manual type using a handle, but it is preferable to use power of a motor or a telescopic cylinder.

The supporting stand may be any as long as it can support the non-bent side of the work sheet metal from below when the work sheet metal is bent by the holding unit.

The upward pressing device presses the sheet metal to be processed upward from the lower surface side when the sheet metal is moved forward (or backward) while being sandwiched between the upper and lower clamping members. The lower surface of the sheet metal to be processed moves forward or backward while sliding on the upper surface of the upward pressing device. In the case where a long sheet metal is bent by reciprocating in the length direction, an upward pressing device may be provided on each side of the sheet metal feeding direction from the sheet metal holding position by the holding unit.

The position changing means adjusts the installation height of the upward pressing device up and down. For example, one end side of the upward pressing device can be pivotally supported by the shaft, and the other end side can be vertically arcuately rotated. It is possible to use the above-mentioned one, or one in which the entire upward pressing device can be slid up and down.

According to the second aspect of the present invention, in the sheet metal working machine of the first aspect, a rotatable roller is used as an upward pressing device.

Further, in the invention of claim 3 of the present application, in the sheet metal working machine according to claim 1 or 2, the sheet metal by the both sandwiching members is provided at a position separated from the sheet metal sandwiching position by the pair of upper and lower sandwiching members in the sheet metal feeding direction. A downward pressing device that can press the sheet metal to be processed downward is attached from the upper surface side of the sheet metal to be clamped, and the installation height of the downward pressing device can be changed up and down by the position changing means. In addition, it is preferable that the downward pressing device also uses a roller, and as the position changing means, for example, one end side of the downward pressing device is pivotally supported by an axis, and the other end side can be vertically arc-rotated. Or a device that can slide the entire downward pressing device up and down.

[0021]

In the sheet metal working machine of each invention of the present application, in a state where the sheet metal to be processed is sandwiched between the both clamping members, the clamping unit is tilted by the arc rotation operation mechanism and the sheet metal is horizontally moved by the sheet metal feeding mechanism. By doing so, sheet metal bending can be performed. In the case where the sheet metal to be processed is largely bent (for example, bent to an angle of 90 °), the sheet metal may be bent for a predetermined small angle (for example, 15 °) several times.

When bending a long sheet metal, the holding unit is moved over the entire length of the sheet metal. At that time, the leading side portion of the sheet metal is lowered by its own weight. Acts to flex.

By the way, in the sheet metal working machine of the present application, an upward pressing device is provided at a position separated from the sheet metal clamping position by the clamping unit in the sheet metal feeding direction, and the workpiece metal plate is moved upward from the lower surface side by the upward pressing device. I am trying to press. Therefore, it is possible to correct the fact that the leading side portion of the sheet metal to be processed is bent downward by its own weight as described above by the upward pressing force of the upward pressing device. In this case, the installation height of the upward pressing device can be adjusted by the position changing means. Therefore, when the upward pressing force is applied by the amount of downward bending due to the own weight, the workpiece to be processed is linearly formed. it can. Further, when the sheet metal to be processed is formed into a special curved shape, the upward pressing device may be positioned further above the downward deflection amount due to the self weight. That is, in this case, the sheet metal to be processed sent out from the sandwiching unit portion is pressed by the upward pressing device to a level substantially higher than the sheet metal clamping height, and the sheet metal front side warps (curves) upward. The bending rate in this case can also be adjusted by adjusting the height of the upward pressing device by the position changing means.

In the second aspect of the present invention, since the roller is used as the upward pressing device, the roller rolls when the sheet metal to be processed slides on the upward pressing device.
No friction occurs between the lower surface of the sheet metal to be processed and the upper surface of the upward pressing device.

Further, according to the invention of claim 3 of the present application, since there is provided a downward pressing device for pressing the work sheet metal downward from the upper surface side of the work sheet metal, the special work in which the work sheet metal is curved at a predetermined curvature is provided. When the sheet metal is formed into a shape, the sheet metal to be processed is pressed down to a predetermined height by the downward pressing device, whereby the sheet metal to be processed having a desired curvature can be formed. In this case, both ends in the length direction of the sheet metal to be processed are curved so as to warp downward. In this case, the upward pressing device may be moved downward to an appropriate lower position where the workpiece pressed by the downward pressing device does not contact, or the upward pressing device and the downward pressing device may be used to move the workpiece sheet metal. It is good to set it to a position where it can be clamped.

[0026]

According to the sheet metal working machine of the first aspect of the present invention,
At the time of feeding the sheet metal when bending the sheet metal to be processed, the downward bending due to the own weight of the end portion of the processed sheet metal can be forcibly corrected by the upward pressing device, so that the length of the processed sheet metal is equal to its entire length. , And can be formed in a straight line without being curved, and there is an effect that high quality processing can be performed. In addition, since the installation height of the upward pressing device can be adjusted by the position changing means, the height of the upward pressing device can be adjusted particularly when performing special processing such as bending the sheet metal to be processed with a desired curvature. There is an effect that the adjustment can be achieved with a simple adjustment.

According to the invention of claim 2 of the present application, in addition to the effect of the sheet metal working machine of claim 1, since a roller is used in the upward pressing device, the roller rotates when the sheet metal to be processed slides and moves. And the movement of the sheet metal to be processed becomes smooth, and there is an effect that sliding scratches do not occur in the sheet metal to be processed.

Further, in the invention of claim 3 of the present application, in addition to the effect of the sheet metal working machine of claim 1 or 2, a downward pressing device is provided separately from the upward pressing device. There is an effect that it is possible to easily perform special processing of forming a curved shape in a state where the side is warped downward.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 10. FIGS. 1 to 9 show a first embodiment of the present invention, and FIG. 10 shows a sheet metal working machine of the second embodiment. Have been. The sheet metal working machine of each of the embodiments is configured such that bending and cutting can be selectively performed on the sheet metal Z to be processed.

A sheet metal working machine according to a first embodiment shown in FIGS. 1 to 9 comprises a base 1, an attaching base 21 mounted on the base 1 so as to be rotatable up and down, and Sheet metal Z to be bent and cut and attached to the front end
A pair of upper and lower sandwiching members 11 for sandwiching the upper and lower sides from each other,
And a rotation drive unit 4 for rotating the pair of upper and lower holding members 11 and 12 in opposite directions to each other.
The work sheet metal Z sandwiched between the sandwiching members 11 and 12 is rotated by rotating
In the sheet metal feeding direction (arrows C-D in FIG. 2), and a sheet metal feeding mechanism 3 configured to sequentially move the sheet holding members 10 in the horizontal direction and a sheet metal holding portion Zc formed by a pair of upper and lower holding members 11 and 12. Direction), an arc rotation operating mechanism 5 for rotating the arc in the circumferential direction (vertical direction) with respect to the
At the time of bending operation of the sheet metal Z to be processed, the holding portion Zc of the sheet metal Z to be processed by the holding unit 10 is an outer portion Z in the width direction.
b, a cutting device 8 for cutting the sheet metal Z to be processed, and a sheet metal feeding direction of the support table 6 at almost the same height as the upper surface of the support table 6 (in the direction of arrows CD). )
A pair of upward pressing devices 60 for pressing the sheet metal Z to be bent at each end thereof upward from the lower surface side.
A, 60A.

This sheet metal working machine is used in the width direction (arrows CD).
Direction) total length is 600-800mm, front and rear direction (arrow A-
(B direction) total length is 800 ~ 1100mm, height is 700 ~
It has a relatively small size of about 900 mm, and can be carried on trucks and other construction sites.

The base 1 is constructed by assembling in a rectangular box shape with a flat plate or a frame material. Also, the side plate 1 of the base 1
A control panel 17 is attached to the outer surface of 6.

The holding unit 10 and the sheet feeding mechanism 3 are mounted on a mounting table 21, respectively, and the mounting table 21 is supported above the base 1 via an arc rotation operation mechanism 5 so as to be capable of arc rotation. . The sandwiching unit 10, the sheet metal feed mechanism 3 and the mounting base 21 constitute a movable unit 2 which is rotatable in an arc with respect to the base 1.

Each of the mounting bases 21 has a hollow upper horizontal frame 2.
2, the lower horizontal frame 23, and the vertical frame 24 are formed in a U shape in a side view. The upper horizontal frame 22, the lower horizontal frame 23, and the vertical frame 24
The space surrounded by is formed with a relatively large volume of space 25 before, after, and below. For example, the space 25
It has a front-rear length of 400 mm and a vertical height of about 300 mm.

An upper base plate 31 for mounting the upper holding members 11, 11 is provided at the tip of the upper horizontal frame 22 of the mounting base 21. On the other hand, a lower base plate 32 (see FIG. 1) for mounting the lower holding members 12, 12 is provided at an end of the lower horizontal frame 23 of the mounting base 21.
The upper base plate 31 and the lower base plate 32 are installed in a substantially rectangular shape and substantially vertically symmetric with each other. Further, the lower surface of the upper base plate 31 and the upper surface of the lower base plate 32 are linear,
In addition, the lower surface of the upper base plate 31 and the upper surface of the lower base plate 32 are provided with a small interval that is slightly larger than the thickness of the sheet metal Z to be processed. The upper and lower base plates 31, 32 used in this embodiment have a height of 210 mm and a width of 370 m.
m, and the thickness is about 40 mm.

The upper base plate 31 is attached to the upper horizontal frame 22 so as to be vertically slidable. (A position provided with an interval through which a sheet metal to be machined can be inserted between the lower plate and the upper surface of the lower base plate). The vertical movement adjusting device 7 has an adjusting screw 71 as shown in FIGS. 1 to 3, and the height of the upper base plate 31 can be adjusted by the adjusting screw 71. It can be fixed to the upper lateral frame 22 at a predetermined height.

The holding unit 10 includes upper and lower holding members 1.
In this embodiment, the holding unit 10 is moved right and left (arrows C-D) as shown in FIG. 3 or FIG.
Direction). The upper and lower holding members 1
Each of the disks 1 and 12 is a perfect circular disk having a diameter of 125 mm and a thickness of about 9 mm.

As shown in FIGS. 4, 6 and 7, the outer peripheral surfaces of the upper holding member 11 and the lower holding member 12 are tapered surfaces. That is, the outer peripheral surface of the upper holding member 11 is
The front side (arrow A side) has a large diameter and the rear side (arrow B side) has a tapered surface with a small diameter.
Is a tapered surface having a small diameter on the front side and a large diameter on the rear side opposite to the upper holding member 11 (each outer peripheral surface is inclined at an angle of about 15 ° with respect to the horizontal plane). The outer peripheral surface of the upper clamping member 11 and the outer peripheral surface of the lower clamping member 12 are parallel to each other in the vicinity thereof.

Further, the edge portions on the front surface side (arrow A side) of the upper holding members 11, 11 are sharply angled to make a cutting edge 1 for shearing.
1a (see FIG. 6 or FIG. 7). In addition, this cutting edge 1
1a constitutes a part of the cutting device 8 as described later.

The upper holding members 11, 11 and the lower holding members 12, 12 are pivotally attached to the upper base plate 31 and the lower base plate 32, respectively, with the upper holding members 11, 11 corresponding to the upper and lower sides, respectively. The lower surface of each of the upper holding members 11, 11 is the upper base plate 3.
1 is mounted so as to protrude slightly from the lower surface. Further, the lower holding members 12 and 12 are also attached with their upper surfaces slightly protruding from the upper surface of the lower base plate 32. The sheet metal Z to be processed is clamped between the lower surfaces of the upper clamping members 11 and 11 and the upper surfaces of the lower clamping members 12 and 12, and the lower surface of the upper clamping members 11 and 11 and the upper surfaces of the lower clamping members 12 and 12. Is adjusted by the vertical movement adjusting device 7 according to the thickness of the sheet metal Z to be processed.

Rotational drive unit 4 which constitutes the sheet metal feed mechanism 3.
In this embodiment, an electric motor is used. By operating a forward / reverse rotatable motor 41 in the forward or reverse rotation direction, the upper holding members 11 and 11 and the lower holding member 1 are rotated.
2, 2 and 12 can be rotated in mutually opposite directions. That is, as shown in FIG. 1, the lower shaft 45A installed horizontally in the lower horizontal frame 23 through the gears 42 and 43 and the upper shaft 22 in the upper horizontal frame 22 through the chain 44 by the power from the single motor 41. The upper shaft 45B and the upper shaft 45B, which are installed laterally, are simultaneously and reversely rotated, and as shown in FIGS. 3 and 4, a gear 46A is provided at each end of the lower shaft 45A and the upper shaft 45B on the holding member installation side. (46B), and separate gears 47A, 47A (47B, 47B) and gear 48 from each gear 46A (46B).
A, 48A (48B, 48B) via each upper holding member 1
The lower holding members 12, 12 are driven so as to rotate in opposite directions at a constant speed. In addition, each shaft (lower shaft 45) for driving the upper and lower clamping members 11, 12 is driven.
A, upper shaft 45B) and each gear (46A to 48A, 46A).
B to 48B) are arranged vertically symmetrically to each other.
Accordingly, the sheet metal feeding mechanism 3 includes the upper and lower holding members 11,
By operating the rotation driving device 4 in a state where the work sheet metal Z is sandwiched between 11, 12, and 12, the work sheet metal Z can be moved in the arrow C direction or the arrow D direction.

The arc rotation operation mechanism 5 has a telescopic cylinder (air cylinder) 51 and a link device 52 for transmitting the power from the telescopic cylinder 51 to the movable unit 2. The link device 52 includes first to fourth link pieces 53,
54, 55, and 56 (each of which has a pair of left and right sides), and the link pieces 53 to 56 are assembled as shown in FIGS. And this arc rotation operation mechanism 5
When the telescopic cylinder 51 is in the maximum extension state, as shown in FIG. 1 or FIG. 4 (shown by solid lines), the upper and lower clamping members 11, 12 are
Keeps the vertical posture, and the telescopic cylinder 51
Is reduced, as shown in FIG.
The entire movable unit 2 is caused to rotate arcuately upward in the circumferential direction with respect to the sheet metal feeding direction with the front edge of the lower surface as the center P.

A guide device 34 for guiding the bending side edge (the edge on the arrow B side in FIG. 1) of the sheet metal Z to be processed is provided in the mount 21 portion. This guide device 34
As shown in FIGS. 1 and 2, a pedestal 36 is provided between the mounting pedestals 35, 35 having a pair on the left and right (arrow C-D direction) in the arrow C-D direction. Rollers 37, 37 for pressing are provided on the upper portions near both ends of each.
The receiving base 36 is provided with a handle 3 for each mounting base 35.
The vertical movement can be adjusted by 8, 38, and the mounting bases 35, 35 together with the receiving bases 36, 35 by separate handles 39, 39.
Can be adjusted forward and backward in the front-back direction (arrow AB direction). As shown in FIGS. 4 and 5, the guide device 34 is configured such that the bent side (reference numeral Za side) end of the sheet metal Z is sandwiched between the upper surface of the receiving base 36 and the roller 37. By feeding and moving Z in the direction of arrow CD,
The folding line for the sheet metal Z to be processed is accurately formed in a straight line. When the guide device 34 is unnecessary, the mounting base 35 is retracted to the rear end position of the space portion 25 of the mounting base 21 as shown by a chain line in FIG.

As shown in FIGS. 5 and 6, a guide table 74 is detachably attached to the upper end of the lower base plate 32 on the rear surface side. The guide table 74 is formed in a rectangular bar shape having a considerable length in the left and right directions (in the directions of arrows CD). Further, the upper surface of the guide base 74 is installed so as to be positioned at the same angle as the upper end inclined surface on the outer peripheral surface of the lower holding member 12 and on the extension line thereof. This guide table 74
When the sheet metal Z to be processed is clamped by both upper and lower clamping members 11 and 12 and bent, the lower surface of the sheet metal Z to be processed is received on the lower surface of the bending side Za by a wide area, so that This is to prevent a streak-like contact mark from being left due to contact of the rear side edge of the lower holding member 12. The guide base 74 has a plurality of vertical grooves 75 formed at predetermined intervals (for example, at intervals of 10 mm) in the width direction. As shown in FIG. 6, a positioning piece 76 is removably fitted into each of the vertical grooves 75. By selecting a fitting position of the positioning piece 76, a desired sheet metal Z can be formed. It can be bent at the width of. The positioning piece 76 is detached from the vertical groove 75 when not necessary.

The support base 6 has substantially the same shape and size as the lower base plate 32, and has a flat portion having a small width (40 to 50 mm) formed on the upper surface thereof as shown in FIG. The upper surface of the support base 6 is positioned and used at substantially the same height as the upper surface of the lower base plate 32 during the sheet metal bending work. The support base 6 can be finely adjusted vertically by a blade advance / retreat operating mechanism 9 for moving the disk blade 81 of the cutting device 8 up and down by a very small height as described later.

The cutting device 8 includes the upper holding members 11, 1
1 and a disk cutter 8 having the same diameter as the upper holding members 11, 11
1, 81 (there are two on the left and right sides as shown in FIG. 3), and a rotation driving device 82 for rotating the respective disk blades 81, 81. Each of the disc blades 81, 81 is
They are axially supported on the side surfaces of the support base 6 at equal intervals between the left and right directions (directions of arrows CD) between 1 and 11.
Further, as shown in FIG. 3, the rotation driving device 82 is configured to rotate the disc blades 81, 81 in the same direction with each other through the gears sequentially by the power from the motor 83 attached to the side surface of the support base 6. Has become. Moreover, each disk blade 81, 81
Are mounted such that their upper surfaces project substantially the same height as the upper surface of the support 6 or slightly upward (for example, about 0.5 mm). The positions on the upper surface of the support base 6 to which the disc blades 81, 81 correspond are
A notch is formed to allow each of the disk blades 81 to face upward.

Then, the supporting base 6 with the disc blade 81
Means that each of the disc blades 81, 81 has the lower holding member 12, 1.
In the state of approaching / opposing to 2, it is vertically slidably mounted on vertical guides 94, 94 of the blade advance / retreat operating mechanism 9 described below. Each of the disk blades 81, 81 is rotated by the rotation driving device 82 at the same speed as that of the upper holding members 11, 11 in the opposite direction.

By rotating the handle 91, the blade advance / retreat operating mechanism 9 can move the entire support base 6 with the disk blade up and down by a very small height along a pair of left and right vertical guides 94, 94. I have. Each vertical guide 94, 94
Are fixed to the left and right side plates 16, 16 (in the direction of arrows CD) of the base 1, as shown in FIG. 3. A pair of left and right screw bolts 93 is screwed to the support base 6. These screw bolts 93, 93 are rotated via respective gear devices 92, 92 driven by a handle 91. And, this blade advance / retreat operation mechanism 9
Rotates the handle 91 clockwise or counterclockwise to move the screw bolts 93,
93 to rotate the support base 6 so that each vertical guide 9
4, 94 can be moved up or down.

On the upper surface of the support 6, photoelectric tubes 18, 1 are located near the left and right ends (in the directions of arrows CD) of the support 6, respectively.
9 is buried upward (see FIG. 2). The photoelectric tubes 18 and 19 detect whether or not there is a sheet metal Z to be processed on the upper part thereof, and the control board 17 causes the motor 41 of the rotary drive device 4 and the arc rotation operation mechanism 5 to detect whether or not there is the sheet metal Z to be processed.
Are automatically controlled.

As shown in FIG. 1, the base 1 has a support 6
Further, the pedestal 30 can be provided at the outer position.
The cradle 30 may be movable in the front-rear direction (the direction of the arrow AB) and may be vertically adjustable. Further, the receiving table 30 can be made detachable from the base 1.

Upward pressing devices 60A, 60A for pressing upward the lower surface of the sheet metal Z to be processed are installed at both ends in the left and right direction (in the direction of arrows CD) of the upper end portion of the support 6. Each of the upward pressing devices 60A, 60A
Are located at positions separated from the sheet metal holding position by the holding unit 10 by a predetermined small distance in the sheet metal feeding direction.
In the sheet metal working machine of this embodiment, the sheet metal Z to be processed is reciprocated in the direction of the arrow C-D, so that the upward pressing devices 60A are also installed one set on each side. Each of the upward pressing devices 60 </ b> A includes a total of three rollers 62, 62, 62 rotatably mounted between two side plates 61. The upper surface of each roller 62 is a side plate 61.
Projecting slightly above the upper surface of. The upward pressing device 60A is installed so that the side plate 61 is pivotally attached to the front surface and the rear surface of the support base 6 by a shaft 64 so that the roller 62 portion can be vertically pivoted.

Further, the upward pressing device 60A can adjust the height by the position changing means 63, as shown in FIG. 8 or FIG. The position changing means 63 forms an arc hole 65 around the shaft 64 in the side plate 61, and inserts a tightening bolt 66 into the arc hole 65 so that the rollers 62, 62, 62 are within the range of the arc hole 65. The height of the installation can be adjusted. That is, the height of the upward pressing device 60A (roller 62) is adjusted by loosening the tightening bolt 66 and rotating the side plate 61 up and down to an appropriate position, and then by tightening the tightening bolt 66.
It can be done by tightening. The height of the upward pressing device 60A (the upper surface height of the roller 62)
Can be adjusted within a range of straddling the sheet metal holding height of the upper and lower holding members 11 and 12. When the upper surface of the roller 62 is installed at a position higher than the sheet metal holding height, the roller 62 moves. The lower surface of the sheet metal Z to be processed can be pressed upward by the roller 62.

The upward pressing devices 60A and 60A are
When the long sheet metal Z is bent, the leading side Zd of the sheet metal to be processed is corrected to be bent while being bent downward by its own weight. The sheet metal Z to be processed is processed linearly by pressing the parts upward in advance by the upward pressing device 60A. The sheet metal Z to be processed
If it is not necessary to correct the downward deflection amount of the roller 62,
Is set to be equal to or lower than the sheet metal clamping height of the clamping unit 10.

The sheet metal working machine of the first embodiment is used as follows. In this embodiment, two photocells 18, 1 are used.
In response to the signal from the control panel 17, the control panel 17 causes the motor 41 of the rotary drive device 4 and the telescopic cylinder 51 of the arc rotation operation mechanism 5 to operate.
And are sequentially activated automatically as described below.

When bending the sheet metal Z to be processed, the vertical movement adjusting device 7 is used in accordance with the thickness of the sheet metal Z to be processed.
The height of the upper base plate 31 is adjusted by the
The distance between the lower surfaces of the lower support members 1 and 11 and the upper surfaces of the lower holding members 12 and 12 is adjusted. I do. Further, the guide device 34 is set at a position and a height where the receiving base 36 matches the folding width of the sheet metal Z to be processed. When the guide device 34 is used, the positioning piece 76 shown in FIG. Further, the properties (for example, thickness, length,
The downward bending amount due to the own weight of the sheet metal leading side Zd at the time of bending processing changes depending on the width or the like), and the set height of each upward pressing device 60A (roller 62) is adjusted according to the downward bending amount.

Then, as shown in FIG.
Is moved to the lowermost position, while the edge of the work sheet metal Z on the arrow B side is along the receiving base 36, the front end side of the work sheet metal Z is moved from the arrow C side to the upper and lower holding members 11, Push between 12 At this time, the front end side of the sheet metal Z to be processed is placed on the roller 62 of the upward pressing device 60A on the near side and inserted. Then, the photoelectric tube 18 on the front side detects the sheet metal, and based on the signal, rotates the motor 41 of the rotary driving device 4 forward (rotates the sheet metal Z in the direction of moving the arrow D side), thereby holding the holding unit 10 (upper and lower holding members). The sheet metal Z to be processed, which is sandwiched between 11 and 12), is fed to the arrow D side by the feeding action of the holding unit 10. Then, the upper and lower holding members 1
Since the outer peripheral surfaces of the workpieces 1 and 12 are slightly inclined at an angle (for example, about 15 °), the sheet metal Z to be processed is fixed at a predetermined angle as shown in FIG. (Eg, 15 °). At this time, the opposite clamping side portion Zb (see FIG. 4) of the sheet metal Z to be processed is supported by the upper surface of the support base 6 and the lower base plate 3
Since the upper surface of 2 has an appropriate width (about 40 mm) in the direction of arrow AB, the sheet metal holding portion Zc can be easily bent. When the sheet metal Z to be processed is sent to the arrow D side while being bent, as shown in FIG. 8 or FIG.
The lower surface of the leading side Zd of the work sheet metal Z rides on the upper surface of the roller 62 of the upward pressing device 60A on the arrow D side, and the roller running portion Ze of the work sheet metal is forcibly bent upward by a predetermined amount. The upward bending amount corresponds to the downward bending amount due to the own weight of the leading side Zd of the sheet metal to be processed. Therefore, when the work sheet metal Z is moved to the end portion, the work sheet metal Z is straightly bent without bending up and down. When the work sheet metal Z moves, the lower surface of the work sheet metal Z
Although the roller rides on the 0A and 60A rollers 62, the rollers 62 roll at this time, so that the work sheet metal Z moves smoothly and the lower surface of the work sheet metal Z is not scratched. When the rear end of the sheet metal Z passes through the phototube 18 on the near side, the motor 41 is stopped by a signal from the phototube 18. At this time, the end on the arrow C side of the sheet metal Z is still held between the left and right holding units 10, 10.

Next, in this state, the telescopic cylinder 51 of the arc rotation operation mechanism 5 is reduced by a predetermined length (first stage), and the movable unit 2 is raised by a predetermined angle (for example, 15 °).
At this time, since the arc rotation center P of the movable unit 2 is located at the lower surface tip portion 11a of the upper holding member 11 in the sheet metal holding portion Zc, the movable unit 2 can be bent smoothly with a relatively small bending force and is sharp. You can make corners. Subsequently, the motor 41 rotates in the reverse direction to feed the sheet metal Z to the arrow C side while bending the sheet metal Z further deeply. At this time, the lower surface of the leading side (arrow C side) of the sheet metal Z to be processed rides on the upper surface of the roller 62 of the upward pressing device 60A on the arrow C side, and is raised upward by the amount of downward bending due to the own weight of the sheet metal to be processed as described above. Acts to bend. Then, the motor 41 is stopped when the end portion of the sheet metal Z on the arrow D side passes through the photocell 19 on the back side, and then the telescopic cylinder 51 is further contracted by a predetermined length so that the movable unit 2 is further predetermined. Raise by an angle (for example, 15 °). Such an operation is repeated several times, and the sheet metal Z to be processed is bent to a desired angle through the state shown by the chain line in FIG. 4 or the state shown by the solid line in FIG. The sheet metal Z to be processed can be bent up to an angle slightly exceeding 90 ° as shown by a chain line in FIG.

As a special bending method, there is a case where it is desired to perform curve forming with both end sides in the length direction of the sheet metal Z to be processed higher than the central portion. In that case, the upward pressing device on each side is pressed. The height of the rollers 62 of 60A and 60A is set to a higher position as shown by a chain line in FIG. 9 (reference numeral 62 '), for example. In this case, the portion of the sheet metal leading side that has climbed onto the roller of the upward pressing device 60A is bent upward by a larger amount than the downward bending amount due to its own weight, as indicated by reference numeral Zd '(FIG. 9). The processed sheet metal Z can be formed into a shape in which it is turned upside down.

Further, when the sheet metal Z to be processed is to be cut, the handle 91 of the blade advancing / retreating operation mechanism 9 is operated so that the upper surface of the disk blade 81 and the lower surface of the upper holding member 11 are made to be the same as shown in FIG. If the tip of the position to be cut in the sheet metal Z to be processed is inserted between the upper and lower clamping members 11 and 12 in the same manner as in the above-mentioned bending work, by moving it up to a height or a height slightly higher than that, The motors 41 and 83 of the rotary drive device 4 and the cutting device 8 are respectively activated by a signal from the photocell 18. Then, as the sheet metal Z to be processed is moved to the arrow D side by the feed action of the upper and lower holding members 11, 12 and the disk cutter 81, the upper holding member 11 and the disk cutter near the holding portion of the sheet metal to be processed. Due to the shearing action with 81, it is sequentially cut linearly. In the case of cutting the sheet metal to be processed, the height of the roller 62 of the upward pressing device 60A is set near the sheet metal clamping height by the clamping unit 10 so that the roller 62 receives the lower surface of the sheet metal to be processed. Since the rollers 62 roll, the movement of the sheet metal to be processed becomes smooth and the lower surface of the sheet metal to be processed is not scratched.

As described above, in the sheet metal working machine of this embodiment, one machine has both the bending function and the cutting function of the sheet metal, and the switching between the bending operation and the cutting operation is performed by the blade advance / retreat operation. Since the operation can be performed only by the operation of moving the disk blade 81 by the mechanism 9, the usability is good and the holding unit 1 is provided.
There is an advantage that the upper holding member 11 can be used for both bending and cutting sheet metal.

When the sheet metal Z is bent at a plurality of positions in the width direction (for example, when it is bent like a gutter), one side of the sheet metal Z is bent, and then the sheet metal Z is bent. The other side may be bent. In this case, the guide device 34 is denoted by reference numeral 3 in FIG.
It is preferable that the space 25 is retracted to the position indicated by 4 'so that the space 25 is largely opened, and the side bent earlier is inserted into the space 25.

In the second embodiment shown in FIG. 10, two downward pressing devices 60B, 60B are provided on the sheet metal working machine of the first embodiment.
Is provided. The sheet metal working machine of the second embodiment is
According to the third aspect of the present invention, the work sheet metal Z is held by the holding unit 10 from the upper surface side of the work sheet metal Z at a position separated from the sheet metal holding position by the holding unit 10 on each side in the sheet metal feeding direction. Downward pressing devices 60B, 60B capable of pressing below the height are attached respectively. Each of the downward pressing devices 60B, 60B has the same structure as that of the upward pressing device 60A in an upside-down posture, corresponding to the position immediately above each of the upward pressing devices 60A, 60A. That is, the downward pressing devices 60B, 60B
At the lower end corners on the front surface side of the upper base plate 31, the side plates 61 are pivotally supported by shafts 64, respectively, and the installation heights of the downward pressing devices 60B, 60B (rollers 62) are changed by the position changing means 63B, 63B, respectively. Can be changed up and down. Position changing means 63 on the downward pressing device 60B side
Similarly to the position changing means 63A on the side of the upward pressing device 60A, B forms an arc hole 65 in the side plate 61, and the arc hole 6 is formed.
5 through which a tightening bolt 66 is inserted.
The tightening bolt 66 on the side of the downward pressing device 60B is screwed onto the front surface of the upper base plate 31. The other configuration of the second embodiment is the same as that of the first embodiment.

The sheet metal working machine according to the second embodiment is suitable for forming a sheet metal Z to be processed into a special shape curved at a predetermined curvature. The sheet metal processing machine Z is formed by a roller 62 of a downward pressing device 60B. By pressing down to a predetermined height, it is possible to forcibly form a sheet metal having a desired curvature.
In this case, the sheet metal Z to be processed is formed into a curved shape in which both ends are lowered. In the case of the second embodiment, the upward pressing device 60A is
The work sheet metal Z pressed down by the above is moved down to an appropriate lower position where the work sheet metal Z does not contact, or the upward pressing device 60
It is advisable to set the position at which the sheet metal Z to be processed can be held between A and the downward pressing device 60B.

In each of the first and second embodiments, each of the position changing means 63A and 63B of the upward pressing device 60A and the downward pressing device 60B is such that the roller 62 can be rotated up and down by an arc. However, in other embodiments, the upward pressing device 60A or the downward pressing device 6 is used.
OB can be slid up and down.

[Brief description of drawings]

FIG. 1 is a side view of a sheet metal working machine according to a first embodiment of the present invention.

FIG. 2 is a plan view of the sheet metal working machine of FIG.

FIG. 3 is a view on arrow III-III in FIG. 1.

4 is a partially enlarged cross-sectional view of the sheet metal working machine of FIG. 1 (IV in FIG. 3).
-IV enlarged sectional view).

FIG. 5 is a state change diagram when the sheet metal is bent in the sheet metal working machine of FIG. 1;

6 is a partial cross-sectional view showing another example of use of the sheet metal working machine of FIG.

FIG. 7 is a partial cross-sectional view showing a use state at the time of cutting a sheet metal in the sheet metal working machine of FIG. 1;

FIG. 8 is an operation explanatory view of an upward pressing device in the sheet metal working machine of FIG. 1;

9 is a partially enlarged view of FIG.

FIG. 10 is a view corresponding to FIG. 8 of a sheet metal working machine according to a second embodiment of the present invention.

FIG. 11 is a side view of a known sheet metal working machine.

FIG. 12 is an operation explanatory view of the sheet metal working machine of FIG. 11;

FIG. 13 is a perspective view of a sheet metal (gutter) processed by the sheet metal processing machine of FIG. 11;

[Explanation of symbols]

1 is a base, 2 is a movable unit, 3 is a sheet metal feed mechanism, 4 is a rotary driving device, 5 is an arc rotation operation mechanism, 6 is a support base, 10
Is a holding unit, 11 is an upper holding member, 12 is a lower holding member, 21 is a mount, 22 is an upper horizontal frame, 23 is a lower horizontal frame,
24 is a vertical frame, 25 is a space portion, 60A is an upward pressing device,
60B is a downward pressing device, 62 is a roller, 63A, 63
B is a position changing means, P is an arc rotation center, Z is a sheet metal to be processed,
Za is a bent side end of the sheet metal, Zb is an outer side portion of the sheet metal, and Zc is a sheet metal holding portion.

Claims (3)

[Claims] 1. A base (1), a mounting base (21) mounted to be rotatable up and down with respect to the base (1), and mounted on a front end of the mounting base (21). A pair of upper and lower holding members (1) capable of holding a sheet metal (Z) to be bent by bending from both front and rear sides and having circular outer peripheral surfaces.
A holding unit (10) having a pair of upper and lower holding members (11, 12), and a rotation drive device (4) for rotating the pair of upper and lower holding members (11, 12) in opposite directions. By rotating the holding members (11, 12) in opposite directions, the holding members (11, 1) are rotated.
2) A sheet metal feed mechanism (3) configured to sequentially move the sheet metal (Z) sandwiched between them in the lateral direction.
And a sheet metal holding section (Z) by the holding unit (10).
c) an arc rotation operation mechanism (5) for rotating the holding unit (10) in the circumferential direction with respect to the sheet metal feeding direction around the center (P), and bending the sheet metal (Z) to be processed. During operation, the clamping unit (1) on the sheet metal (Z) to be processed
0) is the widthwise outer portion (Zb)
And a support stand (6) for supporting the sheet metal (Z), and at a position separated from the sheet metal holding position by the holding unit (10) in the sheet metal feeding direction from the lower surface side of the sheet metal (Z). Z) is mounted with an upward pressing device (60A) capable of pressing the sheet metal above the sheet metal holding height of the holding unit (10).
A sheet metal working machine characterized in that the installation height of A) can be changed up and down by a position changing means (63A). 2. The sheet metal working machine according to claim 1, wherein a rotatable roller (62) is used as the upward pressing device (60A). 3. The sheet metal to be processed (Z) from the upper surface side of the sheet metal to be processed (Z) at a position separated in the sheet metal feeding direction from the sheet metal holding position by the holding unit (10). A downward pressing device (60B) capable of pressing below the holding height is attached, and the installation height of the downward pressing device (60B) is changed by a position changing means (63B).
2. The method according to claim 1, wherein the upper and lower portions can be changed up and down.
Or the sheet metal working machine according to 2.