JPH0890084A - Folding machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a folding machine for bending a kneading machine in which a supporting member that is stronger than a conventional folding machine and that is backed up in the direction of the processing force is arranged without distortion of a mold material. [Structure] Hold the work 50 with the upper mold 2a and the lower mold 3a,
A device for bending a work by raising or lowering the movable blades 6 and 7 for bending. A plurality of reaction force support members 18 are juxtaposed behind the upper clamp member 2 provided with the upper mold 2a and the lower clamp member 3 provided with the lower mold 3a at intervals. The upper and lower sides of each reaction force support member 18 are respectively fixed to the crown 10 and the lower clamp member 3 to form a single rigid structure, and each reaction force support member 18 is connected to a plurality of upper clamp members and lower clamp members. Connect with rods 8 and 9. Between the upper clamp member or the lower clamp member and the reaction force support member 18, the movable blades 6 and 7 for swinging which are swingable in the direction of approaching and separating from the bending line are attached. Further, the reaction force support member 18 is in contact with the back surface of the movable blade near the bending stroke end of the movable blades 6 and 7, and the tip of the movable blade is displaced in the front-rear direction and in the vertical direction so as to reduce the amount of overbend. An overbend setting mechanism 17 for setting is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending machine for bending a work plate material by raising or lowering a movable blade at the end of the work.

[0002]

2. Description of the Related Art In a conventional folding machine, in order to transmit a working force from a hydraulic cylinder to a work plate (hereinafter simply referred to as a work), a cylinder is connected to both frames and fixed by a bed. The lower die is placed on this, the ram is attached to the cylinder movable part, the vertical guide is freely placed, and the upper die is attached to the tip of the ram.

[0003]

As described above, when bending is carried out by the conventional bending machine, since the direction of the processing force changes abruptly at the initial stage and the final stage, the strain of the die material in the horizontal and vertical directions is changed. It is necessary to reduce the number of supporting members. These have been dealt with by providing a backup member in the mold. However, bending of a long material increases the machine width, and in order to reduce the strain of the die mounting portion, a large ram and bed are required. The present invention
It is an object of the present invention to provide a folding machine for bending that does not distort the die material by disposing a supporting member that is stronger than the conventional folding machine and is backed up in the direction of the processing force.

[0004]

In order to achieve the above object, the present invention has a plurality of reaction force supporting members juxtaposed behind the upper and lower clamp members, and the upper and lower sides of each reaction force supporting member are crown and lower clamp members. A single rigid structure is obtained by fixing them to each. That is, a device that presses a work with an upper clamp member and a lower clamp member, and bends the work by raising or lowering a movable blade, which is juxtaposed behind the upper clamp member and the lower clamp member at a distance, and A plurality of reaction force support members each having an upper end fixed to a crown and a lower end fixed to a lower clamp member; a plurality of connecting rods connecting each reaction force support member to the upper clamp member and the lower clamp member; and the upper clamp member or Between the lower clamp member and the reaction force support member group, a movable blade for foot bending that is attached so as to be swingable with respect to the direction of contact with and away from the bending line, and is attached at approximately the center of each of the reaction force support members. The cam roller that comes into contact with the cam surface behind the movable blade for foot bending during bending and the cam roller is displaced in the front-back and vertical directions to cause an overshoot. Characterized by providing an over bend setting mechanism for setting the bend amount.

The reaction force support member is connected to the upper clamp member and the lower clamp member by a connection rod, and the connection rod connected to either one of the upper and lower clamp members is slidable with respect to the reaction force support member. The connecting rod connected to the other clamp member is fixed to the reaction force support member. The overbend setting mechanism consists of a plurality of cams provided on the back surface of the movable blade for footbending, a mounting base provided almost at the center of the reaction force supporting member, a roller supporting member provided inside the mounting base, and a roller supporting member. A cam roller attached to the tip of the member, a screw member that adjusts the displacement of the cam roller in the front-rear direction at the time of contact with the cam roller, and a screw member provided on the outer periphery of the roller support member and rotatable to adjust the cam roller axial line in the vertical direction. It is composed of an attached eccentric member and driving means for driving the screw member and the eccentric member respectively. The eccentric member is fitted in the mounting base by inserting the roller support member inside and forming the eccentric cylindrical surface outside.

[0006]

[Function] The work is pressed by the upper die and the lower die, and the work is bent by moving the movable blade up or down. The processing force at the time of bending is transmitted to a single rigid structure composed of the upper and lower clamp members and the reaction force support member, and the reaction force is supported. By operating the screw member of the overbend setting mechanism to adjust the longitudinal displacement of the cam roller that contacts the back surface of the movable bending blade, or by rotating the eccentric member to change the vertical position of the cam roller. Set the amount of overbend.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the drawings. 1 is a vertical sectional side view of the folding machine of the present invention, and FIG. 2 is a partially cutaway rear view of FIG. This device presses the work (plate material) 50 by the upper and lower clamp members 2 and bends the work 50 by raising or lowering the movable blades 6 and 7 which are bending molds. A ram 2 which is a member and a bed 3 which is a lower clamp member are provided, movable blades 6 and 7 which are kneading type are attached inside the upper and lower clamp members 2 and 3, and a reaction force is provided behind the movable blade. A cam roller 2 that abuts the support member 18 and the back surface of the movable blade.
2 is provided with a backup mechanism 17. 1 and 2, the plate pressing cylinder 40 attached to the crown 10 is operated to lower the ram 2, which is the upper clamp member, to press the work 50, but the upper clamp member is fixed. The apron may be raised by the operation of a pressing device provided below to press the work (not shown).

The upper clamp member 2 has an upper mold 2a at its lower end, and the lower clamp member 3 has a lower mold 3a at its upper surface. Behind the upper and lower clamp members 2 and 3, a plurality of (four in the figure) reaction force support members 18 are juxtaposed at intervals. Each reaction force support member 18 has an upper end fixed to the crown 10 and a lower end fixed to the lower clamp member 3, and further, each reaction force support member 18 and the upper clamp member 2 and the lower clamp member 3 are connected to a plurality of connecting rods 8. , 9 to connect them together into a single rigid structure. However, the connecting rod connected to one of the upper and lower clamp members is slidable with respect to the reaction force supporting member, and the connecting rod connected to the other clamp member is fixed to the reaction force supporting member. In the illustrated example, the connecting rod 8 connected to the upper clamp member ram 2 is slidably connected to the reaction force support member 18, and the connecting rod 9 connected to the lower clamp member 3 is reaction force. It is fixed to the support member 18. 1 and 2
Inside, 11 and 12 are long holes provided in the transmission members 4 and 5 to avoid interference with the connecting rods 8 and 9, and 21 is opened in the reaction force support member 18 at a position corresponding to the slidable clamp member side. Elongated holes for inserting the connecting rod, and 13 and 14 are guide rollers.

The movable bending blades 6 and 7 are attached so as to be swingable with respect to the contacting / separating direction with respect to the upper die 2a or the lower die 3a. That is, as shown in FIGS. 1, 2, and 3, the movable blades 6 and 7 are attached by connecting the transmission members 4 and 5 to the piston rods of the upper and lower foot bending cylinders 41 and 42. The transmission members 4 and 5 are provided with lateral pins 38 and 3 serving as swinging shafts at substantially central portions.
8 is inserted. Each of the movable blades 6 and 7 for bending has an edge for bending at the front end, and has a plurality of steps or continuous pressing cam surfaces 15 and 16 at the rear end. Therefore, the pressing force cam surface 15 or 16 is brought into contact with the cam roller 22 near the bending stroke end of the movable blade to back up the processing force, and by selecting the position of the cam roller 22 in the front-back and up-down directions, The work is bent at a predetermined angle including a bend.

The overbend setting mechanism 20 is shown in FIGS.
As shown in FIG. 5, a plurality of pressing cam surfaces 15 and 16 mounted on the rear surfaces of the reaction blades 6 and 7 are attached to the center of each reaction force supporting member 18, and each reaction force supporting member. 18
Of the mounting base 30, a roller supporting member 31 provided inside the mounting base 30, a cam roller 22 mounted at the tip of the roller supporting member 31, and abutment of the cam roller 22 on the pressing cam surface. The screw member 35 for adjusting the displacement of the cam roller in the front-back direction and the eccentric member 36 provided on the outer periphery of the roller support member 31 and rotatably attached to adjust the cam roller axis in the vertical direction.
And driving means for driving the screw member 35 and the eccentric member 36, respectively.

The eccentric member 36 is rotatably fitted in the mounting base 30 via a sleeve 34, and an eccentric cylinder chamber is formed inside the eccentric member 36 so as to be slidable in the axial direction.
Is inserted. Further, a shaft 33 is laterally laid on the tip of the roller support member 31 to support the cam roller 22, and a rotation stopper 37 is provided in the vicinity thereof, and a forward / backward adjustment shaft 32 is provided at the rear portion to be fixed to the rear wall of the mounting base 30. The screw member 35 is screwed. Pinions 25 and 26 are provided near the rear ends of the forward / rearward movement adjusting shaft 32 and the eccentric member 36 to engage with the rack bars 23 and 24 constituting the driving means, respectively.
When the rack bar 23 is moved back and forth in the direction perpendicular to the paper surface of FIG. 4 by operating a motor or a cylinder (not shown), the forward / backward adjusting shaft 32 screwed into the screw member 35 is supported by the roller supporting member 31. When the cam roller 22 is slightly displaced in the vertical direction and the rack bar 24 is moved back and forth, the cam roller 22 is slightly displaced in the lateral direction by the rotation of the eccentric member 36.

Next, the operation during upward bending will be described with reference to FIG. First, the end of the work plate member 50 is pushed along the lower mold 3a and is pressed against an abutting piece (not shown) to position the bending length. After positioning in this way, the cylinder 40 is operated to lower the ram 2. The work 50 is held between the lower die 3a by pushing down the upper die 2a attached to the lower portion of the ram 2. The position where the work plate is pressed and the cam roller are at the same level. Then, the upward bending cylinder 42 is operated to raise the kneading bending die 7 via the transmission member 5, and the work plate member 50 is bent upward. In the initial stage of bending,
At the end of the process, a processing force is generated in the horizontal direction, but the pressing force cam surface 16 formed in the rear end of the kneading bending die 7 in a plurality of steps or in a continuous state abuts on the cam roller 22, so that the processing force is applied to the backup member 18. Accurately bends a workpiece at a specified angle without causing distortion in the mold material. On this occasion,
As described above, the rack bar 23 is moved back and forth to slightly displace the cam roller 22 in the vertical direction, and the rack bar 24
The bending angle is adjusted by slightly displacing the cam roller 22 that advances and retracts in the left-right direction.

In the case of downward bending, after pressing the work plate material 50, the down bending cylinder 41 is operated to lower the kneading bending die 6 via the transmission member 4 to bend the work plate material 50 downward. A processing force is generated in the vertical direction at the initial stage of bending and in the horizontal direction at the final stage, but the pressing force cam surface 15 formed at the rear end of the kneading bending die makes contact with the cam roller 22 to back up the processing force as before. This is transmitted to the member 18 and the work is accurately bent at a predetermined angle without causing distortion in the mold material. Adjustment of the bending angle can also be achieved by the same operation as before.

6 and 7 show modified examples. FIG. 6 shows a bending machine dedicated to downward bending in which the lower bending mold 7, the bending cylinder 42 and the guide roller 14 are omitted. FIG. 7 shows the upper bending mold 6, the bending cylinder 41 and the guide roller. It is a bending machine dedicated to upward bending, omitting 13. Even in these cases, the work 50 can be bent accurately by the action of the backup mechanism and the overbend setting mechanism. In any of the embodiments, the reaction force of the movable blades 6 and 7 is applied to the reaction force support member 18 via the cam roller 22. The backup mechanism 17 constitutes a very closely closed space and is provided with a large number in the longitudinal width direction to exhibit the same effect as a machine with a small ram and bed width. Therefore, it is possible to manufacture an accurate bent product that does not give strain to the mold. The advance / retreat of the rack bars 23, 24 is controlled by a pulse cylinder, a pulse motor or the like to set the position. It is automatically and freely incorporated into the machining process according to the folding order.

[0015]

As described above, according to the present invention, the reaction force supporting member can be arranged between the frames to reduce the deformation of the die mounting portion, and the entire apparatus can be made stronger and smaller. Not only that, the koki type pressing device and the overbend setting mechanism can be unitized and attached for upward bending, downward bending, etc., which is advantageous in terms of manufacturing cost.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a folding machine according to the present invention.

FIG. 2 is a partially cutaway rear view of the folding machine.

FIG. 3 is a perspective view of a folding machine.

FIG. 4 is an enlarged vertical sectional view of an overbend setting mechanism.

FIG. 5 is an enlarged cross-sectional view of the overbend setting mechanism.

FIG. 6 is a vertical sectional side view of a modified example.

FIG. 7 is a vertical sectional side view of another modified example.

[Explanation of symbols]

 1 Frame 2, 3 Clamping member 4, 5 Transmission member 6, 7 Koki bending type 8, 9 Connecting rod 10 Crown 11, 12 Long hole 13, 14 Guide roller 15, 16 Pushing pressure cam surface 17 Backup mechanism 18 Reaction force supporting member 20 overbend setting mechanism 21 long hole 22 cam roller 23, 24 rack bar 25, 26 pinion 30 mounting base 31 roller support member 32 forward / backward adjustment shaft 33 cam roller support shaft 34 sleeve 35 screw member 36 eccentric member 37 whirl stop 38 pin 40 plate Holding cylinder 41 Koki bending cylinder 42 Koki bending cylinder

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[Procedure amendment]

[Submission date] August 5, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of Invention] Folding machine

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending machine for L- bending a work plate material by raising or lowering a movable blade.

[0002]

2. Description of the Related Art A work plate material is L-bent or flexed
For the plate material, use the upper and lower clamp types with the tip of the plate material free.
By pushing near the edge of the movable blade to raise or lower
The upper and lower clamp-type holding edges as bending points.
Bent into an L shape. In the initial stage of bending, the vertical
Force, horizontal and vertical reaction forces are generated during bending, and end
Has the maximum horizontal reaction force, so
It has a backup member to support it.

[0003]

As described above, when L bending is performed by the conventional folding machine, since the direction of the processing force changes abruptly at the initial stage and the final stage, distortion of the die material in the horizontal and vertical directions is caused. Supporting members that reduce the number are required. These have been dealt with by providing a backup member in the mold. However, bending the long material has a wide machine width and
However, a large ram and bed are required to reduce the strain on the die mounting part. The present invention is a potent than the conventional folding machine, and by arranging the support member backed up in the direction of the working force no less distortion of the machine
It is intended to provide a bending machine for L- bending.

[0004]

In order to achieve the above object, the present invention has a plurality of reaction force supporting members juxtaposed behind the upper and lower clamp members, and the upper and lower sides of each reaction force supporting member are crown and lower clamp members. A single rigid structure is obtained by fixing them to each. That is, a device that presses a work with an upper clamp member and a lower clamp member, and bends the work L by raising or lowering a movable blade ;
A plurality of reaction force supporting members which are juxtaposed rearward of the upper clamp member and the lower clamp member with an interval therebetween, and whose upper end is fixed to the crown and lower end to the lower clamp member, respectively ; the upper and lower clamp members and the reaction force supporting member Sandwiched between
And a pair of upper and lower processing force transmission members that are placed up and down
And; to the bending line at the upper or lower end of the transmission member
A pair of upper and lower holders that are swingably connected in the contact and separation direction
-; Attached to the top or bottom of the holder and
A pair of upper and lower L-bending movable blades having cam surfaces formed later;
Each reaction force supporting portion penetrating in the thickness direction of each movable transmission member.
Material to the upper or lower clamp member
Substantially center mounted, folded in contact with the cam surface after the movable blade back for bending L during processing cam roller and the respective reaction force supporting member; longitudinal and vertical displacement to the cam roller plural connecting rods and that And an overbend setting mechanism for adjusting the amount of overbend. Also, it was connected to either the upper or lower clamp member.
The first connecting rod is slidably attached to the reaction force supporting member.
A second connecting rod attached to the other clamp member.
The pad is fixed to the reaction force support member. Moreover, the addition
The force transmission member is installed on the reaction force support member and the upper and lower clamp members.
Pressed against the multiple pairs of reaction force receiving guide members attached.
I am making it.

Further, according to the present invention, the clamp member and the reaction force support are
One processing force transmission to either the upper part or the lower part of the holding member
A simple type in which a member is vertically movable is also included. In that case
On the upper or lower clamp member and reaction force support member.
One processing force transmitting member is lifted between the lower part and the lower part.
It is clamped in place and placed at the upper or lower end of the processing force transmission member.
One holder that can be swung freely in the direction of approaching and separating from the bending line.
Connect the da. L bend at the bottom or top of the holder
Mounting movable blade, and the thickness direction of the processing force transmission member
Each reaction force support member through the upper clamp member or the lower
Part clamp member and slide against the reaction force support member.
In addition to providing a movable first connecting rod,
A lower clamp member that does not sandwich the processing force transmission member or
Is the upper or lower part of the upper clamp member and the reaction force support member
And a second connecting rod for connecting and with a gap
There is.

The overbend setting mechanism includes a cam surface formed on the back surface of the L- bending movable blade, an attachment base provided substantially in the center of the reaction force support member, and a roller support member provided inside the attachment base. A cam roller attached to the tip of the roller support member, a screw member that adjusts the displacement of the cam roller in the front-rear direction when the cam roller comes into contact with the cam surface, and a cam roller axis line provided in the outer periphery of the roller support member in the vertical direction. an eccentric member rotatably mounted in order to adjust the result of the screw member and the eccentric member and a drive means for driving each of said eccentric member, to form an eccentric cylindrical surface externally fitted inside the roller support member Fitted in the mounting base.

[0007]

The work is pressed by the upper die and the lower die, and the work is bent L by raising or lowering the movable blade. Machining force during bending is over, Ru is transmitted to a single rigid structure constituted by the clamping member and the reaction force supporting member below. Upper and lower in the initial stage of processing
The directional force is supported by the reaction force support member. Processing power
It gradually changes to the horizontal direction, but the cam type is better than the movable type for L bending.
Rollers, reaction force support members, connecting rods, processing transmission members
It is transmitted to the upper and lower clamp materials via the guide rollers,
Support the power of. By operating the screw member of the overbend setting mechanism to adjust the longitudinal displacement of the cam roller contacting the back surface of the L- bending movable blade, or by rotating the eccentric member to change the vertical position of the cam roller. Set the amount of overbend.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the drawings. 1 is a longitudinal sectional side view showing a first embodiment of a folding machine of the present invention, and FIG. 2 is a partially cutaway rear view of FIG. This device
The work (plate material) 50 is pressed by the upper and lower clamp members 2 and 3, and the work 50 is bent L by raising or lowering the movable blades 6 and 7 which are L- bending dies. The clamp member 2 is above the frame 1. provided bed is clamping member 3 of the ram and the lower, the inside of the upper and lower clamp members 2 and 3 Ru mounting the movable blade 6 is L bending tool.

The upper clamp member 2 has an upper die 2a at its lower end, and the lower clamp member 3 has a lower die 3a at its upper surface. Behind the upper and lower clamp members 2 and 3, a plurality of (four in the figure) reaction force support members 18 are juxtaposed at intervals. Each reaction force support member 18 has an upper end fixed to the crown 10 and a lower end fixed to the lower clamp member 3, and further, each reaction force support member 18 and the upper clamp member 2 and the lower clamp member 3 are connected to a plurality of connecting rods 8. , 9 to connect them together into a single rigid structure. However, the connecting rod connected to one of the upper and lower clamp members is slidable with respect to the reaction force supporting member, and the connecting rod connected to the other clamp member is fixed to the reaction force supporting member. In the illustrated example, the connecting rod 8 connected to the upper clamp member ram 2 is slidably connected to the reaction force support member 18, and the connecting rod 9 connected to the lower clamp member 3 is reaction force. that is fixed to the support member 18.

Support for reaction force with the upper and lower clamp members 2 and 3
Between the member 18 is a pair of upper and lower processing force transmission members 4, 5
Holds up and down freely. Upper and lower ends of processing force transmission members 4, 5
Connect the holders 4a and 5a to the
A pair of upper and lower L bending movable blades 6 and 7 are attached to the ends. Movable
The blades 6, 7 have cam surfaces 15, 16 formed behind them.
It During bending, the center of each reaction force support member 18 is
Cam roller 2 that contacts the cam surface behind the L bending movable blade
2 is attached. In addition, the cam rollers 22 are lined up front and rear.
To adjust the amount of overbend by applying a vertical displacement to
It has a barbend setting mechanism 20. Note that FIG.
In FIG. 2, 11 and 12 are long holes provided in the processing force transmitting members 4 and 5 to avoid interference with the connecting rods 8 and 9, and 21 is a reaction force supporting member 18 at a position corresponding to the slidable clamp member side. It is a long hole for inserting the connecting rod. 13,
Reference numeral 14 is a guide member such as a guide roller for receiving a reaction force, but not limited to a roller, a slide member (not shown) may be used.

As shown in FIG. 1, the upper clamp member 2
The connecting rod 8 connected to the reaction force support member 18 is slidably attached to the reaction force support member 18, and the connecting rod 9 connected to the lower clamp member 3 is fixed to the lower portion of the reaction force support member. The transmission members 4 and 5 are the reaction force supporting members 18
And a plurality of pairs of reaction force receiving guide members 13 and 14 attached to the upper and lower clamp members 2 and 3, respectively.
Cam rollers in contact with the rear surface of the reaction force supporting member 18 and the variable moving blade
The backup mechanism 17 is configured with 22. In addition,
1 and 2, the plate pressing cylinder attached to the crown 10
40 is operated to lower the upper clamp member ram 2.
The work 50 is pressed down by
However, a pressing device that fixes the upper clamp member and is provided below
The shape to hold the work by raising the apron by the operation of
It may be a formula (not shown).

The L- bending movable blades 6 and 7 are attached so as to be swingable in the direction of approaching and separating from the upper die 2a or the lower die 3a. That is, as shown in FIGS. 1, 2, 3, the upper and lower L
The movable blades 6 and 7 are attached by connecting the processing force transmitting members 4 and 5 and the holders 4a and 5a to the piston rods of the bending cylinders 41 and 42. The processing force transmission members 4 and 5 have lateral pins 38 and 38, which serve as swing shafts, inserted through substantially the center thereof.
The movable blades 6 and 7 for L bending have an edge for bending at the front end, and a plurality of stepped or continuous pressing cam surfaces 1 at the rear end.
5 and 16 are formed. Therefore, when the movable blade is at the bending stroke end, the pressing cam surface 15 or 1
6 co Backing up working force by bringing into contact with the cam roller 22, bending the workpiece at a predetermined angle including by Ri over bend to selecting the position of the longitudinal and vertical direction of the cam roller 22. This fold is 1
It can be completed with a stroke, so it is time-saving.

The overbend setting mechanism 20 is shown in FIGS.
As shown in FIG. 5, each of the reaction force support members 18 is attached to substantially the center thereof, and the plurality of pressing cam surfaces 15 and 16 provided on the back surface of the L- bending movable blades 6 and 7 and the reaction force support members. 18 and a mounting base 3 provided substantially in the center of the mounting base 3
0, a roller support member 31, a cam roller 22 attached to the tip of the roller support member 31, and a screw member for adjusting the displacement of the cam roller 22 in the front-rear direction when the cam roller 22 comes into contact with the pressing cam surface. 35, an eccentric member 36 provided on the outer periphery of the roller support member 31 and rotatably attached to adjust the cam roller axis in the vertical direction,
The driving means 23 to 26 (FIG. 4) for driving the screw member 35 and the eccentric member 36, respectively.

The eccentric member 36 is rotatably fitted in the mounting base 30 via a sleeve 34, and an eccentric cylinder chamber is formed inside the eccentric member 36 so as to be slidable in the axial direction.
Is inserted. Further, a shaft 33 is laterally mounted on the tip of the roller support member 31 to support the cam roller 22, and a rotation stopper 37 is provided in the vicinity thereof, and a forward / backward adjustment shaft 32 is provided at the rear portion thereof to attach to the rear wall of the mounting base 30. The screw member 35 fixed is screwed. Forward / backward adjustment shaft 32 and eccentric member 36
Pinions 25 and 26 are provided near the rear ends of and to engage with the rack bars 23 and 24, which constitute the driving means, respectively. By operating a motor or cylinder (not shown),
When the rack bar 23 is moved back and forth in the direction perpendicular to the plane of FIG. 4, the forward / backward adjusting shaft 32 screwed into the screw member 35 is pushed forward to slightly displace the cam roller 22 supported by the roller support member 31 in the vertical direction. When the rack bar 24 is moved back and forth, the cam roller 22 is slightly displaced in the left-right direction by the rotation of the eccentric member 36.

Next, the operation will be described during bending above with reference to Figure 2. First, the end of the work plate member 50 is pushed along the lower mold 3a and is pressed against an abutting piece (not shown) to position the bending length. After positioning in this way, to lower the ram 2 by operating the Cylinders 40. The work plate member 50 is pressed between the lower die 3a and the upper die 2a attached to the lower portion of the ram 2. The position where the work plate 50 is pressed and the cam roller 2
2 is on the same level. Then, the upper bending cylinder 42
Is operated and the L is transmitted via the processing force transmission member 5 and the holder 5a.
The bending die 7 is raised and the work plate member 50 is bent upward. A processing force is generated in the vertical direction at the initial stage of bending and in the horizontal direction at the final stage, but a plurality of stepped or continuous pressing cam surfaces 16 formed at the rear end of the L bending die 7 should contact the cam roller 22. To transmit the processing force to the backup member 18,
Accurately bend a workpiece at a specified angle without causing distortion in the die material. At this time, as described above, the rack bar 23 is advanced and retracted to slightly displace the cam roller 22 in the vertical direction, and the rack roller 24 is advanced and retracted to slightly displace the cam roller 22 in the horizontal direction to bend the bending angle. you adjusted.

In the case of downward bending, after pressing the work plate member 50, the downward bending cylinder 41 is operated to lower the L bending die 6 via the processing force transmitting member 4 and the holder 4a .
The work plate member 50 is bent downward. Processing force is generated in the vertical direction at the beginning of bending and in the horizontal direction at the end of bending,
When the pressing cam surface 15 formed at the rear end of the L- bending die contacts the cam roller 22, the processing force is transmitted to the backup member 18 as before, and the work is accurately bent at a predetermined angle without causing distortion in the machine. Bend. Adjustment of the bending angle can also be achieved by the same operation as before.

[0017] Figure 6 and 7 show a modification. This variation is
Either the upper part or the lower part of the clamp member and the reaction force support member
One processing force transmitting member is sandwiched between the crabs so as to be able to move up and down. sand
Over the upper or lower clamp member and reaction force support member
One processing force transmitting member is lifted between the lower part and the lower part.
It is clamped in place and placed at the upper or lower end of the processing force transmission member.
One holder that can swing freely in the direction of approaching and separating from the bending line.
Connect the da. L bend at the bottom or top of the holder
Mounting movable blade, and the thickness direction of the processing force transmission member
Each reaction force support member through the upper clamp member or the lower
Part clamp member and slide against the reaction force support member.
In addition to providing a movable first connecting rod,
A lower clamp member that does not sandwich the processing force transmission member or
Is the upper or lower part of the upper clamp member and the reaction force support member
And a second connecting rod for connecting and with a gap
I have. A bar composed of the reaction force support member 18 and the cam roller 22.
Quick-up mechanism 17, reaction force receiving guide members 14, 15
And having an overbend setting mechanism 20
It is similar to the example.

FIG . 6 shows a bending machine dedicated to downward bending without the lower L bending die 7, the L bending cylinder 42 and the guide roller 14, and FIG. 7 shows the upper L bending die 6 and the L bending cylinder 41. Also, the bending machine is a bending machine for exclusive use in the upward bending without the guide roller 13. However, in FIG. 7, inside the upper portion of the reaction force support member
The pressure receiving block 28 is installed on the side of the
The guide roller 13 on the push member (ram) side.
It Even in these cases , the reaction force of the movable blades 6 and 7 is the cam roller.
It is supported by the reaction force support member 18 via 22, and the work 50 can be bent accurately by the action of the backup mechanism and the overbend setting mechanism 20. Further, the backup mechanism 17 constitutes a very closely closed space, and a large number of the backup mechanisms 17 are provided in the longitudinal width direction to exhibit the same effect as a machine having a small ram and bed width. Therefore, it is possible to make an accurate bent product that does not strain the machine. It should be noted that the rack bars 23 and 24 are moved forward and backward by a pulse cylinder,
Bending angle, work plate controlled by pulse motor etc.
Thickness, but incorporating the automatically set to processing steps in accordance with bending order and the like.

[0019]

As described above, according to the present invention, the reaction force supporting member , the upper clamp member and the lower clamp member are combined.
Connected to each other with several connecting rods to form a single rigid structure
Therefore, Ru can be reduced deformation of the mold mounting portion of the machine to support the reaction force at the time of L bend. In addition, the machine time can be shortened by making the entire device powerful and compact.
Can further upper bending, L bending type pressing device such as a bending down, which is advantageous in manufacturing cost because the over-bending setting mechanism can be attached to a unit.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a folding machine according to the present invention.

FIG. 2 is a partially cutaway rear view of the folding machine.

FIG. 3 is a perspective view of a folding machine.

FIG. 4 is an enlarged vertical sectional view of an overbend setting mechanism.

FIG. 5 is an enlarged cross-sectional view of the overbend setting mechanism.

FIG. 6 is a vertical sectional side view of a modified example.

FIG. 7 is a vertical sectional side view of another modified example.

[Explanation of reference numerals] 1 frame 2, 3 clamp member 4, 5 processing force transmitting member 4a, 5a holder 6, 7 L bending die 8, 9 connecting rod 10 crown 11, 12 elongated hole 13, 14 guide roller 15, 16 push Pressure cam surface 17 Backup mechanism 18 Reaction force supporting member 20 Overbend setting mechanism 21 Long hole 22 Cam roller 23, 24 Rack bar 25, 26 Pinion 30 Mounting base 31 Roller supporting member 32 Forward / backward adjusting shaft 33 Cam roller supporting shaft 34 Sleeve 35 Screw Member 36 Eccentric member 37 Detent 38 Pin 40 Plate pressing cylinder 41, 42 L Bending cylinder

Claims (4)

[Claims] 1. An apparatus for pressing a work by an upper clamp member and a lower clamp member, and bending the work by raising or lowering a movable blade, wherein the upper clamp member and the lower clamp member are arranged side by side with a space therebetween. A plurality of reaction force support members each having an upper end fixed to a crown and a lower end fixed to a lower clamp member, and a plurality of connecting rods connecting each reaction force support member to the upper clamp member and the lower clamp member; Between the clamp member or the lower clamp member and the reaction force support member group, a movable blade for bending which is attached so as to be swingable with respect to the direction of contact and separation with respect to the bending line, and is attached at substantially the center of each reaction force support member. A cam roller that comes into contact with the cam surface behind the movable blade for foot bending during bending, and gives the cam roller a longitudinal and vertical displacement. Folding machine characterized by having a over-bend setting mechanism for setting a Babendo amount. 2. The reaction force support member is connected to the upper clamp member and the lower clamp member by a connection rod, and the connection rod connected to either one of the upper and lower clamp members slides with respect to the reaction force support member. 2. The folding machine according to claim 1, wherein the connecting rod, which is freely connected to the other clamp member, is fixed to the reaction force supporting member. 3. The overbend setting mechanism includes a plurality of cams provided on the back surface of the movable blade for foot bending, a mounting base provided substantially at the center of the reaction force supporting member, and a roller support provided inside the mounting base. A member, a cam roller attached to the tip of the roller support member, a screw member for adjusting the displacement of the cam roller in the front-rear direction at the time of contact with the cam roller, and a cam roller axis provided in the outer periphery of the roller support member for vertically adjusting the cam roller axis. 2. The folding machine according to claim 1, comprising an eccentric member rotatably mounted so as to be movable, and drive means for respectively driving the screw member and the eccentric member. 4. The folding machine according to claim 3, wherein the eccentric member is fitted in the mounting base by inserting a roller support member inside and forming an eccentric cylindrical surface outside.