JPH0818072B2 - Sheet metal processing machine - Google Patents

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 for bending and cutting sheet metal.

[0002]

2. Description of the Related Art As a sheet metal processing machine (sheet metal bending machine) for bending a sheet metal, there have been conventionally used FIGS.
No. 49803) is known. This known sheet metal working machine is a movable unit 10 having a base 101 and a pair of upper and lower nipping rolls 111 and 112.
2, a rotation driving device 104 for rotating the both nipping rolls 111 and 112 in opposite directions, and a movable unit 102.
And an arc rotation operation mechanism 105 for vertically rotating the arc.

The movable unit 102 is rotatably supported on the base 101 at two positions in the front-rear direction (horizontally orthogonal to the left-right direction in FIG. 14). The movable unit support means is composed of a pair of vertical walls 152 (one pair on the front side and the back side in FIG. 14) standing on the base 101.
Large-diameter semi-disc 154 attached to the movable unit 102 side
(There are a pair on the front side and the back side).
That is, an arcuate groove (not shown) is formed on the inner surface of each vertical wall 152, while an arc projection 157 (concentric with the outer circumference of the half disk is fitted to the groove on the outer surface of each half disk 154. In position), each semi-disk 154 is attached to each vertical wall 1
By guiding with the guide 52, the movable unit 102 is supported so as to be able to rotate in an arc around the sandwiching portion between the sandwiching rolls 111 and 112 as the center P.

The rotation driving device 104 operates the handle 141 to rotate both the sandwiching rolls 111 and 112 in mutually opposite directions, so that the sheet metal Z sandwiched between the sandwiching rolls is lengthwise. It can be moved in the horizontal direction (horizontal direction in FIG. 14).

The arc rotation operation mechanism 105 includes a movable unit 1
A gear 158 is provided on the outer circumference of one half disk 154 provided on the 02 side.
And a gear 159 rotated by the handle 151 is meshed with the gear 158. By operating the handle 151, the arc turning operation mechanism 105 can turn the entire movable unit 102 up and down about the tip P of the sheet nipping portion of the upper nipping roll 111 as the center P. ing. Note that the movable unit 102 cannot be directly pivoted at the arc rotation center P portion because the sheet metal Z to be processed is inserted in the arc rotation center P of the movable unit 102 in the horizontal direction.

In this known sheet metal working machine (sheet metal bending machine), the intermediate portion in the width direction (left-right direction) of the flat plate-shaped sheet metal Z is sandwiched between the sandwiching rolls 111 and 112 (the sheet metal to be processed). The non-clamping side Zb of Z is supported on the support base 106), and the handle 151 of the arc rotation operation mechanism 105 is operated to move the movable unit 102 by a predetermined angle (for example, an angle of about 20 ° as shown in FIG. 15). The holding rolls 111 and 112 of the sheet metal to be processed are tilted to bend one end side Za of the holding portion Zc in the length direction within a predetermined angle range, and then the handle 141 of the rotary drive device 104 is operated to operate both holding rolls. By rotating 111 and 112 in opposite directions while tilting, the sheet metal Z sandwiched between the sandwiching rolls is sequentially bent in a predetermined angle range in the front-back direction. It is dynamic, and is able to bent by a predetermined angle over the processed sheet metal Z to the total length (e.g., 20 °) thereby. By repeating the bending operation as described above several times, the sheet metal Z to be processed is, for example, as shown in FIG.
As shown by a chain line in FIG. 1, the angle can be bent up to an angle of 90 °.

Incidentally, as the sheet metal working operation, a cutting operation for cutting the sheet metal into a predetermined shape is frequently performed in addition to the sheet metal bending operation as described above.

[0008]

However, the above-mentioned FIG.
Also, in the known sheet metal processing machine shown in FIG. 15, the base 1 is used as a supporting means for supporting the movable unit 102 in an arc-rotatable manner.
The vertical wall 152 on the 01 side is the semi-disc 1 on the movable unit 102 side.
On the other hand, the arc rotation operation mechanism 105 is configured to rotate the large-diameter semi-disc 154 by the arc operation by the handle operation. In such a structure, the movable unit support is supported. The means and the arc rotation operation mechanism 105 become large in size (a large-diameter semi-disc 154 and a vertical wall 152 having a larger area than that are required), and a guide structure for rotating the movable unit 102 in an arc (vertical wall 152 side). There is a problem that the forming of the circular arc concave groove and the circular arc projection 157) on the half-disk 154 side becomes extremely troublesome and the manufacturing cost becomes high. The arc rotation center P of the movable unit 102 is required to be a fixed fixed position. In this case, the guide structure (the circular arc groove on the vertical wall 152 side and the circular arc projection 157 on the semi-disc 154 side) is used. The processing of () requires high precision, and the mounting position of the semi-disc 154 with respect to the movable unit 102 is also required to have high precision.

Further, since the known sheet metal working machine shown in FIGS. 14 and 15 is a bending machine for bending the sheet metal, a machine dedicated for cutting is separately required for cutting the sheet metal. In addition to the problem that the equipment cost is high and a large installation space is required (necessary for two cutting machines and bending machines), it is also necessary to perform cutting and bending of sheet metal. In addition, there is a problem that the sheet metal to be processed has to be carried between the cutting machine and the folding machine, and the carrying work is troublesome.

In view of the problems of the conventional sheet metal working machine as described above, the present invention can easily and inexpensively manufacture the arc rotation supporting structure of the movable unit, and further, the bending work and the cutting work of the sheet metal can be performed by one unit. And a part of the member having a sheet metal bending function can be effectively used as a sheet metal cutting member, and bending processing with different curvatures can be performed by a simple operation. It is an object of the present invention to provide a sheet metal working machine.

[0011]

The invention according to claim 1 of the present application is as follows.
A base, a mounting base attached to the base so as to be vertically arcuately rotatable, and a work sheet to be bent, which is provided on the mounting base, can be clamped from both front and back sides, and an outer peripheral surface is formed. A sandwiching unit having a pair of upper and lower sandwiching members each having a circular shape, and a rotary drive device provided on the mounting base for rotating the pair of sandwiching members in mutually opposite directions are provided, and both sandwiching members are mutually driven by the rotary drive device. A sheet metal feeding mechanism configured to sequentially move laterally the sheet metal to be clamped and held between the both clamping members by rotating the sheet metal clamping mechanism between the both clamping members, and a sheet metal clamping section by the pair of clamping members. An arc rotation operation mechanism for rotating the mounting base in an arc direction in the circumferential direction with respect to the sheet metal feeding direction as a center, and a clamping portion of the clamping unit by the clamping unit at the time of bending operation of the sheet metal to be processed are outside in the width direction. In a sheet metal working machine equipped with a support base for supporting a portion, an upper bearing portion and a lower bearing portion, which are vertically separated from each other by a predetermined distance below a sheet metal holding portion, are provided on a base to perform an arc rotation operation. The mechanism includes first to fourth links between the base and the mounting base for supporting the mounting base so as to be vertically arcuately rotatable about the sheet metal sandwiching portion, and operating means for vertically pivoting the mounting base. And each link has a first
The upper end of the link is pivotally supported on the lower bearing by the first shaft, one end of the second link is pivotally supported on the upper bearing by the second shaft, and the upper end of the third link is mounted on the mounting base by the third shaft. The lower end of the first link and the lower end of the third link are pivotally supported by the fourth shaft, and the upper end of the fourth link is attached to the mounting base at a position separated from the third shaft by a predetermined distance. It is pivotally supported by five axes, the other end of the second link and the lower end of the fourth link are pivotally supported by the sixth axis, and the intermediate portion of the second link and the intermediate portion of the third link are pivoted by the seventh axis. The first axis, the second axis, the seventh axis, and the fourth axis are located at the tops of the parallelograms, respectively, and the third axis and the fifth axis are attached.
An axis, a sixth axis, and a seventh axis are located on the respective apexes of different parallelograms, and further, an arc rotation center, a second axis, a seventh axis, and a third axis.
It is characterized in that the axis and the axis are set so as to be located at the tops of the other parallelograms.

The sheet metal working machine according to the first aspect of the present invention is configured to bend a sheet metal. In the sheet metal working machine according to the first aspect of the present invention, the sandwiching unit composed of the pair of sandwiching members may be provided in one set, but it is preferable to install two sets in close proximity in consideration of stability when bending the sheet metal. In this case, the upper holding member and the lower holding member of each holding unit are rotated in opposite directions by the rotation driving device.

A power unit such as a telescopic cylinder is preferably used as an operating means for vertically rotating the mount in the arc rotation operating mechanism. For example, the mount is manually rotated by a handle. It is also possible to make it possible to turn the upper and lower arcs. Further, the operating means may be arranged to swing any one of the first to fourth links supporting the mounting base, or to directly push or pull or rotate the mounting base. But it's okay.

According to a second aspect of the present invention, in the sheet metal working machine according to the first aspect, an annular blade edge is formed at an edge portion of at least one of the sandwiching members, and the sandwiching edge is formed. A disk blade capable of shearing the sheet metal to be processed is provided at a position close to the member in cooperation with the sandwiching member having the blade edge, and the disk blade is sandwiched by the sandwiching unit in cooperation with the blade edge forming sandwiching member. It is characterized in that a blade advancing / retreating operation mechanism is provided for advancing / retreating between a shearing position where the sheet metal to be processed can be sheared and a retracting position where the sheet metal to be clamped by the clamping unit is not cut.

The sheet metal working machine according to the second aspect of the present invention has a structure capable of cutting (a hundred picks) the sheet metal with both upper and lower blades.
In the sheet metal working machine of claim 2, the disc blade and the one sandwiching member facing in the up-down direction of the disc blade constitute a sheet metal cutting blade. The disc blade is located below the sheet metal sandwiching position. It becomes easier to attach, and in that case, the cutting edge is formed on at least the upper holding member of the upper and lower holding members. It should be noted that the upper and lower sandwiching members may each be formed with a cutting edge. The blade advancing / retreating operation mechanism moves the disc blade between the shearing position and the retreat position,
For example, a structure in which the disc blade is moved up and down by operating the handle can be adopted. Further, the disc blade may be attached to a supporting base that serves as a receiving base when the sheet metal is bent, and in that case, the disc blade may be moved up and down together with the supporting base by the blade advancing / retreating operation mechanism.

According to the invention of claim 3 of the present application, in the sheet metal working machine according to claim 1 or 2, a frame body, in which a holding unit is installed, is provided as a mounting base, and the frame body is arranged in a direction of approaching or separating from a support base. With a guide member that guides slidably,
A third shaft that pivotally supports the upper end of the third link and a fifth shaft that pivotally supports the upper end of the fourth link are respectively coupled to guide members, and the frame serves as a guide member between the frame and the guide members. It is characterized in that a slide adjusting means for sliding the slide plate is provided, and another processing disk can be detachably attached to the front surface of the sandwiching member which is vertically opposed to the support base.

In the sheet metal working machine according to claim 3 of the present application, at the position where the frame of the mounting base is retracted, another machining disk is attached to the front surface of the holding member without removing the holding member.
The sheet metal can be bent with different curvatures (when the sheet metal processing machine of claim 1 is used), or the sheet metal can be cut. Further, the frame body can be moved forward and backward with respect to the guide member by operating the slide adjusting means. The frame body advanceable and retractable dimension by the slide adjusting means is attached to the front surface of the sandwiching member. The thickness of the processing disk is necessary. As a means for attaching the processing disk to the front surface of the holding member, a structure in which the processing disk is detachably fixed to the holding member by bolting can be adopted.

[0018]

According to the sheet metal working machine of the first aspect of the present invention, when the sandwiching unit is tilted by the arc rotating operation mechanism while the sheet metal to be processed is sandwiched between the sandwiching members, the outer side portion of the sheet metal is moved. By being supported by the support base, the sheet metal of the sandwiched portion is bent at a predetermined angle, and subsequently the sheet metal is fed laterally by the sheet feed mechanism so that the sheet metal can be sequentially bent in the feed direction. It is like this. In addition, the arc rotation operation mechanism is such that the first to fourth links are assembled between the base and the mounting base under the above-mentioned conditions, so that the mounting base is centered on the sheet metal holding part by both holding members (an immobile fixed position). ), It can be mounted so as to be capable of pivoting up and down, and by operating the operating means, the mounting base can be pivoted about the sheet metal holding portion. That is, the first
-Arc axis that makes the mounting base a virtual fixed point by setting the first to seventh axes pivotally supporting the fourth links to be located at the tops of the three parallelograms described above. It can be rotatably supported by the arc when the center is exposed.

Further, in the sheet metal processing machine according to claim 2 of the present application, the blade advancing / retracting operation mechanism causes a shearing position at which the sheet metal holding the disk blade by the holding unit is not cut and a shearing position where the sheet metal is cut. It can be moved back and forth between the positions. When the disc blade is in the retracted position, the arc-rotating operation mechanism tilts the clamping unit while the clamping plate is clamped between the clamping members, and the clamping plate feed mechanism moves the clamping plate laterally. When moved, it allows normal sheet metal bending work. Also, with the disc blade positioned at the shearing position, the sheet metal to be processed is clamped between both clamping members, and the sheet metal is moved laterally by the sheet metal feeding mechanism to form the blade tip of the disc cutter and the clamping unit. A shearing action is performed between the sandwiching member and the sheet metal to be processed can be cut linearly.

Further, in the sheet metal working machine according to claim 3 of the present application,
By operating the slide adjusting means, the frame body is retracted with respect to the guide member by a predetermined dimension (a thickness of another processing disk) in a direction in which the frame body is separated from the support base, and further, the holding member on the side vertically facing the support base. For example, a processing disk having a radius of curvature having a predetermined curvature is fixed to the front surface of the. When the sheet metal is operated in this state in the same manner as in the case of claim 1, the sheet metal can be bent along the edge shape of the processing disk (folded into a round shape). Further, in the sheet metal working machine according to claim 2, when a disk with a cutting edge is used as a processing disk and the disk with a cutting edge is fixed to the front surface of the sandwiching member in a state where the frame is retracted,
Leave the frame retracted (without returning it to its original position)
The sheet metal can be cut and processed.

[0021]

According to the sheet metal working machine of claim 1 of the present application, each of the first to fourth links serving as the arc rotation operation mechanism satisfies the predetermined condition with seven axes between the base and the mounting base. By assembling in the state, the mounting base can be supported so as to be vertically arcuately rotatable about the sheet metal sandwiching portion. Therefore, the structure for supporting the mount so as to be pivotable up and down can be composed of four links and seven shafts that pivotally support the link, and the structure for supporting the mount can be simply and inexpensively constructed. The effect is that you can.

Further, in the sheet metal working machine according to claim 2 of the present application, since the disc blade can be moved back and forth between the shearing position and the retreat position by the blade moving back and forth operation mechanism,
Bending and cutting of sheet metal can be selectively performed by a sheet metal processing machine of a table, and conventionally, when performing sheet metal processing, two machines, a bending machine and a cutting machine, can be used to perform work by one machine. .
Further, since a shearing blade edge is formed on one of the sandwiching members of the sandwiching unit used for sheet metal bending, and the blade edge forming sandwiching member is used as a cutting blade for sheet metal cutting,
There is an effect that the holding member can be effectively used (combined) for bending and cutting.

Further, in the sheet metal working machine according to claim 3 of the present application,
The frame side of the mounting base is retracted from the support base by the thickness of the processing disk used as an attachment by the slide adjusting means, and the front surface of the sandwiching member on the side vertically facing the support base is rounded with a predetermined curvature, for example. There is an effect that the sheet metal bent portion can be bent in a rounded shape by a simple work of fixing the working disc. Further, in the sheet metal working machine according to claim 3, in the sheet metal working machine according to claim 2, when a disk with a cutting edge is used as a processing disk attached to the front surface of the sandwiching member, the sheet metal is cut while the frame is retracted. It can be processed, and sheet metal cutting work can be done by simply changing the processing disk from the round bending work state (switching work between bending work state and cutting work state becomes easy)
There is also the effect.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 13. A sheet metal working machine according to this embodiment is mounted on a base 1 and vertically rotatable with respect to the base 1. A mount 20
And a clamping unit 1 having a pair of upper and lower clamping members 11 and 12 provided on the mounting base 20 for clamping the sheet metal Z to be bent or cut from both front and back sides thereof.
0, and a rotation drive device 4 for rotating the pair of upper and lower clamping members 11 and 12 in mutually opposite directions, and by rotating both clamping members 11 and 12 in mutually opposite directions by the rotation driving device 4. The sheet metal feed mechanism 3 configured to sequentially move the sheet metal Z to be clamped and held between the holding members 11 and 12 in the lateral direction, and the sheet metal holding portion Zc by the pair of upper and lower holding members 11 and 12 As P, an arc rotation operation mechanism 5 for arc-rotating the mounting table 20 in the sheet metal feeding direction (direction of arrow CD in FIG. 2) in the circumferential direction (vertical direction), and bending operation of the sheet metal Z to be processed. Sometimes the clamping unit Z of the sheet metal Z to be processed by the clamping unit 10
Is provided with a support base 15 for supporting the width direction outer portion Zb and a cutting device 8 for cutting the sheet metal Z to be processed.

This sheet metal working machine has a depth direction (arrow C-
The total length in the D direction is 400-500 mm, the left and right direction (arrow A
-B direction) total length 800-1000mm, height 700
It has a relatively small size of about 900 mm, and can be loaded on trucks and brought to construction sites. In the following description, for convenience, the arrow AB direction is referred to as the left-right direction and the arrow CD direction is referred to as the front-rear direction in each drawing.

The base 1 is constructed by assembling in a rectangular box shape with a flat plate or a frame material. In addition, the side walls 16 and 16 on the front-rear direction side of the base 1 have projecting walls 16a and 16a projecting upward at a position slightly leftward from the middle portion in the left-right direction.
(There are a pair at the same position in the front and rear). 1 and 4 at the positions near the upper ends of the protruding walls 16a, 16a.
As shown in FIG. 5, an upper bearing portion 17 that pivotally supports one end portion of a second link 52 of an arc rotation operation mechanism 5 described later is provided,
A predetermined distance (for example, 200
Lower side bearing portions 18, 18 that pivotally support the upper end portion of the first link 51 of the arc rotation operation mechanism 5 are provided on the side plates 16, 16 spaced apart by about 250 mm). How to use the upper bearing portion 17 and the lower bearing portion 18 will be described later.
It is convenient to attach casters to the four corners of the lower surface of the base 1 so that the sheet metal working machine can be manually pushed and moved.

The mounting base 20 has a U-shaped frame body 21 in a side view, and a guide member 27 for slidably supporting the frame body 21 in the left-right direction. The frame body 21 can be moved back and forth with respect to the guide member 27 by the slide adjusting means 6 as described later.

The sandwiching unit 10 and the sheet metal feed mechanism 3 are mounted on a frame 21 of a mounting base 20, respectively, and the mounting base 20 can be pivoted above the base 1 via an arc pivoting operation mechanism 5. It is supported. The sandwiching unit 10, the sheet metal feed mechanism 3 and the mounting base 20 constitute a movable unit 2 which is capable of arc rotation with respect to the base 1.

The frame 21 of the mounting base 20 is formed in a U-shape in a side view by a hollow upper horizontal frame 22, a lower horizontal frame 23, and a vertical frame 24, respectively. Further, the upper horizontal frame 22 and the lower horizontal frame 23
The space 2 having a relatively large volume is surrounded by the vertical frame 24 and the vertical frame 24.
5 is formed.

The frame 21 is slidably supported by a guide member 27. This slide mechanism is shown in FIG.
It is configured as shown in FIGS. 6 and 7. That is, the frame 2
Slide members 26, 26 that are long in the left-right direction are fixed to the lower end portions of both side surfaces in the front-rear direction of the lower horizontal frame 23 of FIG. On the other hand, the guide member 27 is installed on the lower surface side of the lower horizontal frame 23, and rail portions (or receivers) for guiding the slide members 26, 26 in the left-right direction are provided at both ends in the front-rear direction of the guide member 27. Stand) 28, 28 is provided. By mounting the slide members 26, 26 on the side of the frame 21 on the rails 28, 28, the frame 21 can be slid in the left-right direction with respect to the guide member 27. .

The frame 21 (slide members 26, 26)
Slide adjusting means 6 and 6 for sliding the frame body 21 in the left-right direction with respect to the guide member 27 are provided between the guide member 27 (rail portions 28, 28). As shown in FIGS. 6 and 7, the slide adjusting means 6 and 6 are provided with a rear end wall 27a of the guide member 27 on the female screws 30 and 30 formed from the rear end surfaces of the slide members 26 and 26 toward the front.
The adjusting screws 61, 61 are screwed together. Each adjustment screw 6
The reference numerals 1 and 61 are adapted to rotate at fixed positions with respect to the rear end wall 27a of the guide member 27. Further, push screws 62, 62 for pressing the rear end surfaces of the slide members 26, 26 are screwed into the rear end wall 27a. In the slide adjusting means 6, the adjusting screws 61, 61 are screwed or unscrewed in the state where the push screw 62 is retracted as indicated by reference numeral 62 '(FIG. 7), so that the guide member 27 is disengaged. The frame 21 can be slid back and forth. In addition, this slide mechanism is provided on the front surface of the upper holding member 11 with a processing disk 13 used as an attachment.
The distance for sliding the frame body 21 to the left and right with respect to the guide member 27 (reference numeral L in FIG. 7) is operated by substantially the same distance as the thickness of the processing disk 13. .

At the tip of the upper horizontal frame 22 of the frame body 21, the upper base plate 3 for mounting the upper holding members 11, 11 is provided.
1 is provided. On the other hand, a lower base plate 32 for mounting the lower holding members 12, 12 is provided at the tip of the lower horizontal frame 23 of the frame body 21. As shown in FIG. 4, the upper base plate 31 and the lower base plate 32 have a substantially rectangular shape and are vertically symmetrical to each other. Further, the lower surface of the upper base plate 31 and the upper surface of the lower base plate 32 are linear, and the lower surface of the upper base plate 31 and the upper surface of the lower base plate 32 are slightly smaller than the thickness of the sheet metal Z to be processed. It has a large small interval. The upper and lower base plates 31 and 32 used in this embodiment have a height of 210 mm and a width of 370 mm.
The thickness is about 40 mm.

The upper base plate 31 is attached to the upper horizontal frame 22 so as to be slidable up and down. Moreover, the upper base plate 31 is adjusted to an appropriate height position by the vertical movement adjusting device 7 (that is, the upper base plate 31). It can be fixed at a position where a sheet metal to be processed can be inserted between the lower surface and the upper surface of the lower base plate). The vertical movement adjusting device 7 has an adjusting screw 71 as shown in FIGS. 3 and 4, and the adjusting screw 71 can adjust the height of the upper base plate 31. It can be fixed at a predetermined height with respect to 31.

As shown in FIG. 4, the holding unit 10 has two left and right upper holding members 11, 11 and two left and right lower holding members 12, 12. The upper and lower holding members 1
1, 12 are of the same shape in this embodiment and have a diameter of 12
A perfect circular disk with a thickness of 5 mm and a thickness of 9 mm is used. Further, the edge portion on the front surface side (arrow A side) of the upper holding members 11, 11 is sharply angled to form a cutting edge 11a for shearing. The cutting edge 11a constitutes a part of the cutting device 8 as described later. Also, each upper clamping member 1
As shown in FIGS. 4 and 5, a plurality of screw holes 11b are provided in each of the screw holes 11b (11 in the illustrated example).
b ... Is formed. Each of the screw holes 11b is provided on the front surface of the upper holding member 11 with another processing disk 13 as described later.
For mounting.

Then, the upper holding members 11 and 11 and the lower holding members 12 and 12 are axially attached to the upper base plate 31 and the lower base plate 32, respectively, in a state that they correspond to each other vertically. The lower surface of each of the upper holding members 11, 11 is the upper base plate 3.
It is attached so that it slightly protrudes from the lower surface of 1 (about 1 mm). Further, each of the lower holding members 12 and 12 is also attached with its upper surface slightly protruding (about 1 mm) 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.

An upper holding roller 74 and a lower holding roller 75 are provided in the space 25 of the frame body 21 for vertically holding the end portion of the sheet metal Z to be worked held by the holding unit 10 near the holding side. There is. The upper holding roller 74 is attached downward from the lower surface of the upper horizontal frame 22, and the lower holding roller 75 is attached upward from the upper surface of the lower horizontal frame 23. Each of the holding rollers 74 and 75 is for moving the sheet metal Z in a stable posture in cooperation with the upper and lower clamping members 11 and 12 when the sheet metal Z is fed by the sheet metal feeding mechanism 3. The upper and lower holding rollers 74 and 75 are positionally adjustable in the approaching / separating directions with respect to each other to adjust the distance between the rollers, or in the front-back direction with respect to the upper horizontal frame 22 and the lower horizontal frame 23. It may be slidable so that the sheet metal holding position can be adjusted back and forth. Further, the holding rollers 74 and 75 can be detached and operated.

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, FIG. 4 and FIG. 5, this rotary drive device 4 is driven by a single motor 41 and is horizontally installed in the lower horizontal frame 23 via the gears 42 and 43. The shaft 45A and the upper shaft 45B laterally installed in the upper horizontal frame 22 via the chain 44 are driven so as to rotate at the same time and in opposite directions to each other, and further, the sandwiching member installation side of the lower shaft 45A and the upper shaft 45B. Gear 46A on each end
(46B) is attached, and each upper holding member 11 and 11 and each lower holding member are sandwiched from the respective gears 46A (46B) via different gears 47A, 47A (47B, 47B) and gears 48A, 48A (48B, 48B). The members 12 and 12 are driven so as to rotate in reverse at a constant speed.

Therefore, the sheet metal feed mechanism 3 operates the rotary drive device 4 while the sheet metal Z to be processed is clamped between the upper and lower clamping members 11, 11, 12, 12 to operate the sheet metal Z to be processed. Can be moved in the arrow C direction or the arrow D direction.

The arc rotation operation mechanism 5 includes a telescopic cylinder (air cylinder) 50 serving as an operating means, and the telescopic cylinder 50.
And a link device for transmitting power from the movable unit 2 to the movable unit 2. The link device is shown in FIGS. 1, 2, and 8 to 10.
As shown in, each of the first to fourth links 51 to 54 (there are a left and right pair), and the respective links 51 to 5 are provided.
4 is assembled as follows.

That is, in each of the four links 51 to 54 (there are a pair of left and right), the first link 51 is a triangular plate-shaped one, and the second link 52 is a long bar-shaped one in the middle part. The third link 53 uses a vertically oriented rod-shaped one, and the fourth link 54 uses a short and short one vertically. Then, in each of these links, the upper end side corner portion of the first link 51 is connected to the base side plate 1.
6 is pivotally supported on the lower bearing portion 18 provided by the first axis A, and one end portion (upper left end portion) of the second link 52 is secondly supported by the upper bearing portion 17 provided on the protruding wall 16a of the base side plate 16. Pivot on axis B,
The upper end of the third link 53 is connected to the guide member 27 of the mounting base 20.
Of the first link 51 and the lower end of the third link 53 are pivotally supported by the fourth axis D, and the upper end of the fourth link 54 is attached to the mounting base. 20 is pivotally supported by the fifth axis E at a position closer to the right side of the guide member 27, and the second link 5
The other end portion (right end portion) of 2 and the lower end portion of the fourth link 54 are pivotally supported by the sixth axis F, and the middle portion (bent portion) of the second link 52.
The third link 53 and the intermediate portion (position near the upper portion) are pivotally supported by the seventh axis G to be assembled. Further, in these pivotal support portions, the first axis A, the second axis B, the seventh axis G, and the fourth axis D are respectively located on the tops of the parallelogram, and the third axis C and the fifth axis E. And the sixth axis F and the seventh axis G are located on the respective apexes of different parallelograms, and the arc rotation center P of the movable unit 2, the second axis B, the seventh axis G, and the third axis C. And and are set so that they are respectively located on the tops of different parallelograms.

As described above, by assembling the links 51 to 54 under the above conditions, the movable unit 2 as a whole is vertically arcuated with the sheet metal holding portion Zc formed by the holding members 11 and 12 as the center P (an immovable fixed position). It can be mounted for rotation. In addition, in this embodiment, the arc rotation center P of the movable unit 2 is located at the upper vicinity of the upper right corner of the disc blade 81 in FIG. 5, but the frame 21 slides left and right with respect to the guide member 27. As a result, when used, the lower end of the front surface of the upper clamping member 11 (in the state where the processing disk 13 is attached to the front surface of the upper clamping member 11 as shown in FIG. 13), the lower end of the front surface of the processing disk 13 is attached. ) Is the arc rotation center P
Set so that it is located at.

Further, the telescopic cylinder 50 of the arc rotation operation mechanism 5
Has its expansion and contraction side connected to the first link 51. Then, by expanding and contracting the expandable cylinder 50,
The movable unit 2 through each of the links 51 to 54 with the sheet metal sandwiching portion Zc as the center P and the state of FIG. 1 (or FIG. 8) and FIG.
An arc can be rotated between the state of 1 and the state of 2 '(or FIG. 10). That is, in this embodiment, when the telescopic cylinder 50 is in the maximum extension state, the work sheet metal Z clamped between the upper and lower clamping members 11 and 12 maintains a horizontal posture as shown in FIG. As the cylinder 50 shrinks, the movable unit 2 as a whole is arc-rotated upward in the circumferential direction with respect to the front edge of the lower surface of the upper clamping member 11 with respect to the sheet metal feeding direction so that the clamping side portion Za of the sheet metal Z is predetermined. When the telescopic cylinder 50 is maximally contracted by bending at an angle (for example, the state shown by the solid line in FIG. 11), the movable unit 2 is shown by the chain line in FIG. 11 (reference numeral 2 ').
As shown in FIG.
Is bent to an angle of 90 °.

The support base 15 has substantially the same shape and size as the lower base plate 32 as shown in FIG.
As shown in, a narrow flat portion is formed. The upper surface of the support base 15 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, as shown in FIG. The support base 15 can be finely adjusted in the vertical direction by a blade advancing / retreating operation mechanism 9 for moving the disc blade 81 of the cutting device 8 up and down by a minute height as described later.

The cutting device 8 includes the upper holding members 11, 1 described above.
1 and a disk cutter 8 having the same diameter as the upper holding members 11, 11
1, 81 (there are two left and right) and the respective disc blades 81, 81
And a rotation drive device 82 for rotating. The disc blades 81, 81 are axially supported on the side surfaces of the support base 15 at equal intervals in the front-rear direction between the upper holding members 11, 11. In addition, the rotary drive device 82 includes the support base 15
The power from the motor 83 attached to the side surface of the disk cutter 81, 81 through the first gear 84, the second gear 85, 85 (left and right pair) and the third gear 86, 86 (left and right pair), respectively. Are designed to rotate in the same direction as each other. The third gears 86, 86 are formed to have the same diameter as or slightly larger (for example, about 0.5 to 1 mm) than the disc blade 81, and on the right side of each disc blade 81, 81 (arrow A side). It is mounted coaxially with the disc blade 81 in a state of being joined to the disc. Further, the third gears 86, 86 and the disc blades 81, 81 are so arranged that the upper surfaces thereof are substantially flush with the upper surface of the support base 15 or slightly above (eg, about 0.5 mm) above. Installed.

Then, the supporting base 1 with the disc blade 81
5, each of the disc blades 81, 81 has the lower holding member 12,
In the state of being close to and facing 12 the vertical guides 94 of the blade advancing / retreating operation mechanism 9, which will be described below, are mounted so as to be slidable up and down. 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 advancing / retreating operation mechanism 9 can move the entire support base 15 with the disc blade up and down by a small height along the pair of left and right vertical guides 94, 94. There is. Vertical guides 94, 9
As shown in FIGS. 2 and 3, 4 is fixed to the left and right side plates 16, 16 of the base 1. A pair of left and right screw bolts 93, 93 are screwed onto the support base 15. These screw bolts 93, 93 are rotated via respective gear devices 92, 92 driven by a handle 91. Then, the blade advancing / retreating operation mechanism 9 rotates the handle 91 rightward or leftward to cause each gear device 9 to rotate.
Each screw bolt 93, 93 is rotated via 2, 92, so that the support base 15 is moved to each vertical guide 94, 94.
It can be moved up or down along the. It should be noted that the blade advancing / retreating operation mechanism 9 may be provided with a lock mechanism that prohibits rotation of the handle 91.

The processing disk 13 mounted on the front surface of the upper holding member 11 is, for example, as shown in FIG. 13, one in which a radius of curvature 13a is appropriately formed on the outer peripheral edge portion, or the edge portion is sharply angled. It is possible to use a blade having a sharpened cutting edge. And this processing disk 13
Is a state in which the left and right upper clamping members 11, 11 are applied to the front side thereof, and a plurality of bolts 14 are respectively applied from the outside of the processing disk 13 to the female screws 11b of the upper clamping member 11.
It is fixed by screwing into.

The sheet metal working machine of the illustrated embodiment is used as follows. First, the sheet metal Z to be processed is sandwiched by the upper and lower clamping members 1
When the bending process is performed by the first and second sheets 12, 12, the height of the upper base plate 31 is adjusted by the vertical movement adjusting device 7 according to the plate thickness of the sheet metal Z to be processed, and the upper holding members 11, 11 are formed. The distance between the lower surface of the and the upper surfaces of the lower holding members 12 and 12 is adjusted.
Further, the blade advance / retreat operation mechanism 9 positions the upper surface of the support base 15 at substantially the same height as the upper surface of the lower base plate 32, as shown in FIG. The frame body 21 can be slid to the left and right with respect to the guide member 27, but the slide adjusting means 6 is set so that the lower end portion of the front surface of the upper holding member 11 is located at the arc rotation center P. Keep it.

Then, in this state, the tip end side of the sheet metal Z to be processed is oriented with the length direction for forming the folding curve in the front-rear direction (direction of arrow CD) and at the position where it should be bent. Tip part (blade edge forming part) 1 of the sheet metal holding surface of the holding member 11
In the state of being matched with 1a, both upper and lower clamping members 11 on the front side,
It is pushed between 12 to be clamped (the non-clamping side portion of the sheet metal to be processed is placed on the support base 15). At this time, the sheet metal Z to be processed is also inserted between the upper and lower holding rollers 74 and 75. Further, as in the case of forming a final shape to be bent, for example, in a trough shape having a U-shaped cross section, as the sheet metal Z to be machined, one end side is previously moved upward as indicated by reference numeral Zd (FIGS. 1 and 11). Or a space bent downward) is used, the bent portion Zd is formed between the upper horizontal frame 22, the lower horizontal frame 23, and the vertical frame 24 of the mounting base 20. Since it is accommodated in the portion 25, the bent portion Zd does not collide with the constituent members of the sheet metal working machine.

Subsequently, the sandwiched work sheet metal Z
Telescopic cylinder 51 of arc rotation operation mechanism 5 according to the plate thickness of
Is reduced by an appropriate length, and the entire movable unit 2 is tilted by an appropriate angle range (for example, an angle of 45 ° as shown by a chain line shown by reference numeral 2'in FIG. 5 or a solid line shown by reference numeral 2 in FIG. 11). Let Then, the sandwiching portion Z by the upper and lower sandwiching members 11 and 12 in the sheet metal Z to be processed.
Since the non-clamping side portion Zb is supported by the upper surface of the support base 15 and the upper surface of the lower base plate 32 has an appropriate width (30-40 mm) in the direction of arrow AB, c can be easily obtained. Can be folded. Further, at this time, the arc rotation center P of the movable unit 2 is set to the upper clamping member 1 in the sheet metal clamping section Zc.
Since it is located at the lower end 11a of the lower surface of No. 1, it can be bent smoothly with a relatively small bending force, and sharp corners can be obtained.

Next, the motor 41 of the rotary drive unit 4 is moved forward (or reverse) with the movable unit 2 tilted as it is.
Driven in the rotating direction, both upper and lower clamping members 11, 11, 1
While rotating 2 and 12 in mutually opposite directions, the motor 83 of the cutting device 8 is also driven so that each disk blade 81, 81 (and the third gear 86, 86) rotates in the same direction as the lower holding member 12. . Then, the sheet metal Z to be clamped between the upper and lower clamping members is sequentially fed in the direction of arrow C by the feeding action of the holding unit 10 and the feeding action of the third gears 86, 86 on the support base 15 side. At that time, the sheet metal holding part Zc
Are sequentially bent at a predetermined angle (for example, 45 °). Then, at the time when the bending of the sheet metal Z to be processed to the trailing side end portion is completed (the trailing side edge portion of the sheet metal Z to be processed is still sandwiched between the upper and lower sandwiching members), the rotation driving device 4 is rotated. The motor 41 is stopped. In this state, the sheet metal Z to be processed is bent over its entire length by a predetermined angle (for example, 45 °).

When the sheet metal Z to be processed is further bent, the upper and lower clamping members 11, 11, 12,
The telescopic cylinder 5 of the arc rotation operation mechanism 5 while holding the end portion of the sheet metal Z that has been primarily preliminarily bent between the 12 pieces.
1 is further reduced by one step to further incline the movable unit 2, and then the motor 41 of the rotary drive device 4 and the motor 83 of the cutting device 8 are respectively rotated reversely (or positively),
The sheet metal Z that is primarily bent in the same manner as above
Is bent to a deeper angle than that (in the illustrated example, the movable unit 2 is denoted by reference numeral 2'as shown by a chain line in FIG. 11).
The sheet metal to be processed can be bent to an angle of 90 ° by rotating the arc to the position of. When the plate thickness of the sheet metal Z to be processed is large, the bending angle for one time may be made small (for example, about 20 °) so that it is bent several times to a predetermined angle.

When the sheet metal Z to be processed is to be cut, the handle 91 of the blade advancing / retreating mechanism 9 is operated so that the upper surface of the disc blade 81 holds the upper holding member 11 as shown in FIG.
Is moved up to the height of the lower surface of the sheet metal, and in that state, the tip of the position to be cut in the sheet metal Z to be cut is inserted between the upper and lower clamping members 11 and 12 in the same manner as in the bending work described above, and then the rotary drive device 4 The motors 41 and 83 of the cutting device 8 may be driven. Then, as the sheet metal Z is moved to the arrow D side by the feeding action of the upper and lower clamping members 11 and 12, the third gear 86, etc., the sheet metal Z in the vicinity of the clamping portion Zc of the sheet metal becomes the upper clamping member 11. Due to the shearing action with the disc blade 81, the blades are sequentially cut in a straight line. When the sheet metal Z to be processed has been completely cut, the motors 41 and 83 are stopped.

Further, when the sheet metal Z is bent with the bent portion being rounded, as shown in FIG.
Is loosened as indicated by reference numeral 62 ', and the adjustment screw 61
The frame body 21 is retracted by the thickness (dimension L) of the processing disk 13 used as an attachment, and then the push screw 62 is tightened to lock the frame body 21. Then, as shown in FIG. 13, the processing disk 13 is bolted to the front surface of the upper holding member 11 (both), and if the bending work is performed in the same manner as described above, the curved portion of the processing disk 13 is formed on the bent portion of the sheet metal. Can form a radius with the same curvature as. Further, when the working disk 13 is replaced with another working disk with a cutting edge while the frame body 21 is retracted, the sheet metal cutting operation can be performed with the frame body 21 in the same position.

As described above, in this sheet metal working machine, a single machine has both a sheet metal bending function and a sheet metal cutting function, and the blade advancing / retreating operation mechanism 9 switches between bending work and cutting work. Since it can be performed only by the advancing / retreating operation of the disc blade 81, it is easy to use and has an advantage that the upper holding member 11 of the holding unit 10 can be used both for bending and cutting the sheet metal.

Further, as the supporting means of the arc rotation operation mechanism 5,
Since the four links 51 to 54 are used, the structure of the arc rotation operation mechanism 5 is simple and can be manufactured at low cost.

Further, in this embodiment, since the mounting base 20 is formed with the large-capacity space portions 25 on the left and right sides (in the direction of arrow AB) and on the upper and lower sides, only the flat sheet metal Z to be processed is used. However, even if it has a bent portion that is bent in advance, it can be freely bent, and one sheet metal can be bent at a plurality of locations.

[Brief description of drawings]

FIG. 1 is a side view of a sheet metal working machine according to an 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.

FIG. 4 is a view taken along the line IV-IV in FIG.

5 is a partially enlarged sectional view of the sheet metal working machine of FIG. 1. FIG.

6 is an enlarged sectional view taken along line VI-VI of FIG.

FIG. 7 is an enlarged sectional view taken along line VII-VII of FIG.

8 is a schematic view of an arc rotation operation mechanism in the sheet metal working machine of FIG.

9 is a state change diagram of FIG. 8. FIG.

FIG. 10 is a state change diagram of FIG. 9;

11 is a state change diagram at the time of bending the sheet metal in the sheet metal processing machine of FIG.

FIG. 12 is a partial cross-sectional view showing a usage state when cutting the sheet metal in the sheet metal processing machine of FIG. 1.

13 is a view corresponding to FIG. 6 showing another example of use of the sheet metal working machine of FIG. 1.

FIG. 14 is a side view of a known sheet metal working machine (sheet metal bending machine).

15 is an explanatory view of the operation of the sheet metal working machine of FIG.

[Explanation of symbols]

1 is a base, 2 is a movable unit, 3 is a sheet metal feed mechanism, 4 is a rotary drive device, 5 is an arc rotation operation mechanism, 6 is a slide adjusting means, 7 is a vertical movement adjusting device, 8 is a cutting device, and 9 is Blade advancing / retreating operation mechanism, 10 a clamping unit, 11 an upper clamping member,
11a is a blade edge of an upper clamping member, 12 is a lower clamping member, 13 is a working disk, 15 is a support, 20 is an attachment, 21 is a frame, 27 is a guide member, 51 is a first link, and 52 is a second.
Link, 53 is third link, 54 is fourth link, 81 is disc knife, A to G are axes, P is arc rotation center, Z is sheet metal to be processed, Zb is sheet metal outer portion, Zc is sheet metal holding portion. is there.

Claims (3)

[Claims] 1. A base (1), a mounting base (20) mounted on the base (1) so as to be vertically arcuately rotatable, and a bending process provided on the mounting base (20). A pair of upper and lower clamping members (11, 1) that can clamp a sheet metal (Z) to be processed from both front and back sides and have circular outer peripheral surfaces.
And a rotation driving device (4) for rotating the pair of holding members (11, 12) provided on the mounting base (20) in opposite directions to each other. By rotating both clamping members (11, 12) in opposite directions by the drive device (4), the work sheet metal (Z) clamped and held between the clamping members (11, 12) is sequentially traversed. The sheet metal feeding mechanism (3) configured to move in the direction, and the mounting base (20) with the sheet metal holding portion (Zc) formed by the pair of holding members (11, 12) as the center (P). An arc rotation operation mechanism (5) for rotating the sheet metal (Z) in an arc direction in the circumferential direction, and clamping by the clamping unit (10) on the sheet metal (Z) to be processed during bending operation. The portion (Zc) is the outer side portion in the width direction. And a support base for supporting the (Zb) (15), the base (1), upper bearing portions vertically by a predetermined distance from the lower position than the sheet metal clamping unit (Zc) (1
7) and a lower bearing portion (18) are provided, and the arc rotation operation mechanism (5) includes a base (1) and a mounting base (2).
0), and the first to fourth links (51 to 54) for supporting the mounting base (20) in a vertically arcuate manner about the sheet metal holding portion (Zc) as a center (P), and And an operating means (50) for rotating the mounting base (20) in a vertical arc, wherein each of the links (51 to 54) has an upper end portion of the first link (51) on the lower bearing portion (18). It is pivotally supported by the first shaft (A), and one end of the second link (52) is connected to the upper bearing portion (1).
7) is pivotally supported by the second shaft (B), the upper end of the third link (53) is pivotally supported by the mount (20) by the third shaft (C), and the lower end of the first link (51). And the lower end of the third link (53) are pivotally supported by the fourth shaft (D), and the upper end of the fourth link (54) is separated from the third shaft (C) by a predetermined distance. (20) is pivotally supported by the fifth shaft (E), and the other end of the second link (52) and the lower end of the fourth link (54) are pivotally supported by the sixth shaft (F). The middle part of the link (52) and the middle part of the third link (53) are pivotally supported and assembled by the seventh shaft (G), and the first shaft (A), the second shaft (B), and the first shaft (A). 7th axis (G) and 4th
The axis (D) is located at each top of the parallelogram, and the third axis (C), the fifth axis (E), the sixth axis (F), and the seventh axis (G) are different from each other. Of each of the parallelograms, and further includes the center of arc rotation (P), the second axis (B), and the seventh axis.
A sheet metal working machine, characterized in that the axis (G) and the third axis (C) are set so as to be located at the respective apexes of different parallelograms. 2. The sheet metal working machine according to claim 1, wherein an annular cutting edge (11) is provided at an edge portion of at least one of the sandwiching members (11, 12).
A disk capable of shearing the work sheet metal (Z) in cooperation with the nipping member (11) having the cutting edge in the vicinity of the nipping member (11) having the cutting edge (11a) while forming a). A shearing position where a blade (81) is provided, and the disk blade (81) is capable of shearing the sheet metal (Z) sandwiched by the sandwiching unit (10) in cooperation with the blade forming sandwiching member (11). The clamping unit (10)
A sheet metal working machine comprising a blade advance / retreat operation mechanism (9) for advancing and retracting between the retracted position where the sheet metal (Z) to be clamped by is not cut. 3. The sheet metal working machine according to claim 1 or 2, wherein the mounting base (20) is a frame (21) on which the holding unit (10) is installed, and the frame (21) is a support (15). ) And a guide member (27) for slidably guiding in the approaching / separating direction, and the third shaft (C) and the fourth link (54) pivotally supporting the upper end of the third link (53). The fifth shaft (E) pivotally supporting the upper end is connected to the guide member (27), and the frame body (2) is provided between the frame body (21) and the guide member (27).
A slide adjusting means (6) for sliding (1) with respect to the guide member (27) is provided, and another processing disk (11) is provided on the front surface of the holding member (11) which is vertically opposed to the support base (15). 13) A sheet metal working machine characterized by being detachably attachable.