JPH01154822A - Bending width changing device for bending machine - Google Patents

Abstract

PURPOSE:To bend long and short sides with a series of dies by adhering desired dies to decide the length of an upper die among a number of split upper dies provided on the lower part of a ram according to a work length. CONSTITUTION:In changing a bending width, a forced slide mechanism 32 is slid laterally and 1st intermediate split dies 8... are guided and slid to a guide groove of an upper die body 5. Between the outermost one of a necessary number of split dies 8... adhered to the side of one corner block 7 and an unnecessary one adjacent to the above is formed a clearance by the dimension obtained when the other corner block 12 and a necessary number of split dies 13... are added up. Then, a moving frame 16 is slid, a block 12 and the split dies 13... are carried behind this clearance and all of the split dies 13... are pushed forward by a pusher. Then, a necessary number of the split dies 13... are brought forward by a partner mechanism 28 and arranged with the split die 8, a block 12, too, is pushed forward to be arranged with the split dies 13... and to change the length of the upper die.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a bending machine for bending the edge of a workpiece, and the present invention provides a bending machine that bends the edge of a workpiece by changing the effective mold width of an upper mold according to a change in the bending width of the workpiece. For more details, please refer to the folding machine that allows you to change the
Depending on the length of the workpiece, the required number of divided upper molds are placed at the lower end of the ram to determine the length of the upper mold, and the length of the upper mold is determined by connecting the upper mold with the lower mold or with the wing beam. tal
The present invention relates to a bending width changing device for a bending machine that bends the edge of a workpiece using IH.

(Prior art) Metal cabinet doors for electrical equipment and furniture;
For lids, etc., panels are often used, with the edges of plate material bent into a U-shape or an L-shape. Generally, such panels are made by bending the short side edges of the workpiece, and then folding the long side edges into the same shape to match the inside of the short side bevel.

Therefore, conventional bending machines have a large number of specialized upper molds for bending molds depending on the length of the workpiece, and the upper molds are replaced manually each time the workpiece dimensions change, resulting in high costs. Moreover, it did not improve work efficiency and was dangerous.

In order to improve this drawback, the upper mold is made into a split type, and molds with different lengths are combined, and the necessary number of split upper molds are installed manually depending on the length of the workpiece, or by using a sliding type or rotating type. There is a known method for entering and exiting by making a ceremony
(See Publication No. 23051).

(Problems to be Solved by the Invention) By the way, among the above conventional examples, the slide type is equipped with a pair of left and right split horizontal slide mechanisms, and the width of the upper mold is adjusted while controlling these two slide mechanisms. Therefore, two sets of various devices are required for the split-type lateral slide, resulting in two problems: difficulty in control operation and enlargement of the folding machine. Furthermore, since this product uses a split mold with two widths, 50 mm and 55 straw, it is necessary to adjust the loading position onto the lower mold from left to right depending on the width of the work. The problem is that the loading work is cumbersome.

In addition, the rotary type has a second
The rotary operation shaft of the intermediate split type, and the screw shaft for sliding operation of the corner block are installed internally, and for the wide first intermediate split type, each gear is equipped with a gear and a rack that meshes with the gear. And since we adopt a configuration with a hydraulic cylinder that moves this rack up and down, what about the equipment? In addition to increasing the size of the JTM, the split mold is rotated to deviate from below the ram to the rear, which places an unbalanced load on the ram to the rear2.Therefore, it is necessary to increase the strength of the ram support structure. This results in an increase in the size of the -layer device.

Therefore, the present invention successfully combines the advantages of the sliding type, which does not require consideration of unbalanced loads on the ram, and the advantage of the combination structure of the narrow-width split type and wide-width split type, which allows the workpiece loading position to be kept constant. At the same time, we aim to miniaturize the device and reduce the surface area of the mold changing work, and provide a device that can bend both short and long sides using a series of molds without the troublesome work of changing molds as in conventional equipment. The purpose is to

(Means for Solving the Problems) The configuration of the present invention for achieving the above object will be explained below using FIGS. 1 to 9 corresponding to embodiments.

This invention provides a bending machine as described at the beginning with a ram 4.
One corner block 7 is suspended from the lower surface of the ram, and a guide groove 6 is provided along the longitudinal direction of the ram, and a number of first intermediate split molds 8 are suspended so as to be movable in the lateral direction. 1
These first intermediate split molds 8... are selectively and detachably engaged with holes 11 provided on the back surfaces of the intermediate split molds 8...
A forced slide mechanism 32 equipped with one hook pin 35 for forcibly moving laterally is provided on the back of the upper mold, and the other corner block 12 and the first intermediate divided mold 8...a large number of thinner second intermediate divided molds 13...The group is held in close contact with each other, and a moving frame 16 is provided which is mounted on the back of the ram and is forcibly moved laterally, and the other corner block 12 is connected to the first intermediate split type 8. ... is configured such that it can be forcibly moved in and out from the back rear to the front, and on the back side of the second intermediate portion υ1 type 13..., these separated types 13... group are separated into a first intermediate division. Type 8...
A pusher 19 is provided for controlling extrusion in the mold number selection movement process from the rear of the back surface to the front of the rear surface existing position, and the pusher 19 is made to correspond to each second intermediate divided mold 13... These divided molds 13...d are provided with a buffer structure 21 that elastically absorbs the forward resistance during the mold number selection transfer process and allows the pusher 19 to push forward, and Divided type 13... is provided with a tailgating mechanism 28 that collectively pushes the group further forward.

(Function) When changing the bending width, the forced slide mechanism 32 is horizontally slid, and the first
The intermediate divided molds 8... are guided by the guide a6 of the upper mold body 5 and are laterally slid along the longitudinal direction of the upper mold main body 5, and the required number of first intermediate divided molds are brought into close contact with one corner block 7 side. Between the outermost part of the mold 8... and the unnecessary part next to it, there is a gap with a size that is the sum of the other corner block 12 and the required number of second intermediate divided molds 13... is formed. Next, the moving frame 16 is laterally slid to carry the other corner block 12 and the second intermediate divided mold 13 to the rear of this gap, and then the pusher 19 moves the entire second intermediate divided mold 13... is pushed forward. but,
At this time, since the size of the gap exists only for the number of molds required, the front end of the divided molds 13 other than those required is the outermost first intermediate divided mold 8. It touches the back and prevents further advancement, and the required number of split type 1
3... Only the group is subsequently pushed forward a little, thereby selecting the number of types. At this time, the buffer structure 21 acts on the group of second intermediate divided molds 13 left behind, allowing the pusher 19 to move forward.

Next, the required number of second intermediate split molds 1 are pushed forward a little.
3...The group is taken forward all at once by the tailgating mechanism 28 and aligned with the outermost intermediate divided mold 8, and the other corner block I2 is also pushed forward and placed in the second intermediate divided mold 13. ..., which changes the length of the upper mold.

Therefore, the width can be changed using one corner block 7 side as a zero reference, and the first intermediate divided die 8... can only be moved horizontally, and the other corner block 12 and second intermediate divided die can be moved forward and backward. Only the long and short lengths are changed, so there is no unbalanced load on the ram.

(Embodiment) Next, an embodiment in which the folding width changing device for a folding machine according to the present invention is applied to a wing hender (folding machine) will be described in detail based on the descriptions in FIGS. 1 to 7.

(Structure of the upper die) The bending machine according to the present invention is made up of upper and lower dies 1.2 and wing dies 3, and the structure of the upper die 1 is unique among them.

The upper mold according to the present invention consists of two corner blocks 7゜12, a first middle divided mold 8 with a large width sandwiched between both blocks.
..., and a narrow second intermediate portion vI type 13..., and on the mouth side, there are two corner blocks with a width of 127.5 mm, 18 pieces of the first intermediate split type with a width of 501 mm, The case is shown in which nine pieces of the second intermediate split type with a width of five strokes are used.

Therefore, the upper mold l has an upper mold main body 5 having a downward U-shaped cross section attached to the lower part of the ram 4, and one corner block 7 is suspended from one end of the lower part of the upper mold main body 5, and the width is increased toward the other end. A large number of large first intermediate split molds 8 are suspended.

A dovetail shape 9 is integrally protruded from the inner bottom of the U-shaped guide 46 of the upper mold main body 5, and a dovetail groove to be inserted into the dovetail shape 9 is provided on the upper part of the intermediate split mold 8. 10 are formed, and each intermediate split mold 8 is hung movably along the longitudinal direction of the upper mold body 5. Also, on the back surface of the intermediate split molds 8..., there are engagement holes 11 into which hook pins (described later) for moving the intermediate split molds 8 along the longitudinal direction of the upper mold body 5 are fitted.・I'm wearing it.

(Configuration of the other corner block and the second intermediate divided mold) On the other hand, the other corner block 12 and a large number of narrow second intermediate divided molds 13 are arranged on the lower side of the back side of the upper mold body 5. There it is,
It is provided movably along the longitudinal direction and the front-back direction of the supranuclear mold main body 5. Specifically, a pair of loose molds 14 (the upper one is not shown) are integrally provided on the back surface of the upper mold 1 at a predetermined interval vertically along its longitudinal direction, and furthermore, as appropriate, on the back side thereof. A movable frame 16 supported by parallel screw rods 15 is disposed with an interval of
are mounted closely side by side. Both ends of the threaded rod 15 are held on the back surface of the upper mold 1 so that they can only rotate freely, and one end of the screw rod 15 is connected to a servo motor (not shown) for forward and reverse rotation. This causes the moving frame 16 to reciprocate along the longitudinal direction of the upper mold body 5.

The other corner block 12 has its front end moved from the same level as the front end of the first intermediate divided mold 8 . ＼It has a structure that allows it to move in and out freely even to the rear.

In the figure, 121 is a guide rod integrally connected to the rear end of the other corner block 12, and a dovetail type 123 is fitted into a pair of front and rear guide bodies 122 and 122 fixed to the lower surface of the moving frame 16. .

Further, the second intermediate divided mold 13... is formed to be long in the front and back (approximately 2.5 times as long as the first intermediate divided mold), and the second intermediate divided mold 13... is formed on the back side thereof. Model number selection mechanism 18
is provided so that the number of molds can be increased or decreased as appropriate depending on the width of the workpiece.

(Configuration of the mold number selection mechanism) Specifically, the configuration of the mold number selection mechanism 18 is as follows.
Intermediate split mold 13...A pusher 19 with a width equal to the entire width of the group, and a fluid pressure cylinder 2 that moves it back and forth.
0 and each second intermediate split mold 13...
It consists of a buffer structure 21 provided inside. As shown in FIG. 4, this buffer structure 21... has holes 22... bored in the front surface of the pusher 19 corresponding to each of the second intermediate split molds 13... and is loaded into the holes 22... spring 2
3... and a pin 24 whose tip is always projected forward from the front surface of the pusher 19 by this spring 23...
. . . The pins 24 .

(Configuration of the tailgating mechanism) 25... is a retaining piece raised integrally on the upper side of the second intermediate split type ■3... at the same position near the rear end, and each of them has a corresponding portion. Type I 1
3... Through-holes 26... are drilled at equal dimensional positions from the front end and pass through in the left-right direction, and the second intermediate portion υ of the selected required number of molds 13... The hook bin 29 of the tailgating mechanism 28 that moves the split molds 8 to the front end position can be inserted therethrough. 2 in the diagram
7a, 27a are storage bodies 27 which also serve as guide plates, which are provided to sandwich the second intermediate split mold 13 from the left and right sides.
The side plate 27b is the bottom plate.

The tailgating mechanism 28 is arranged on the movable frame 16 of the other corner block 12 beside the group of second intermediate divided molds 13, and includes a fluid pressure cylinder 30 whose axis is along the longitudinal direction of the upper mold body 5. This piston rod functions as the hook pin 29. This tailgating mechanism 28 moves the moving frame 16 along the axis in the front-rear direction.
A dovetail-shaped guide 2 is formed by a fluid pressure cylinder 31 disposed above.
It has a configuration that it can move back and forth along the corner block 18 in the same way as the other corner block 12.

(Configuration of forced slide mechanism) Reference numeral 32 denotes a forced slide mechanism of the first intermediate split type 8 provided on the side of the other corner block 12, which includes a fluid pressure cylinder 33 whose axis is aligned in the front-rear direction and its piston. rod 3
Hook bin 35 integrally protrudes forward from the front end of 4.
and a frame body 36 for holding these fluid pressure cylinders 33 and hook bins 35. A guide rod 37 and a threaded rod 38 supporting the upper and lower parts of the frame 36 are arranged parallel to each other with their axes aligned along the longitudinal direction of the upper mold body 5 and are spaced apart from each other at an appropriate interval in the upper and lower sides. The hook bin 35 is inserted into and removed from the engagement hole 11 formed on the back surface of the first intermediate split mold 8 by moving the piston rod 34 in and out. In the locked state, the frame body 36 is moved along the longitudinal direction of the upper mold body 5 by the rotation of the threaded rod 38 in accordance with the rotation of the servo motor, and the required number of first intermediate divided molds 8 are moved upward. It is slid along the longitudinal direction of the mold body 5.

In the figure, reference numeral 39 denotes a pusher 40 that is supported by the dovetail 9 of the U-shaped groove 6 of the upper mold body 5 and reciprocates along the groove 6, and a fluid pressure cylinder (not shown) that moves this pusher 40. It is a Guikurampa consisting of.

Next, FIG. 8 shows another embodiment of the tailgating mechanism 28, in which the tailgating mechanism 28 is loaded into the other corner block 12. A circular hole 310 extending along the longitudinal direction of the upper mold body 5 is formed through the upper part of the corner block 12 to form a cylinder chamber 311, and
A piston loft 312 is loaded into the cylinder chamber 311 with its tip facing toward one corner block 7, and the other opening of the round hole 310 is closed 313. When such a configuration is adopted, the second intermediate split mold 13 into which this piston rod 312 functioning as the hook pin 29 is inserted...
The through holes 26... may be provided at the same position near the front end of the second intermediate split mold 13, and the retaining pieces 25...
It is no longer necessary to provide a hydraulic cylinder 31 and a guide 28 for moving this tailgating mechanism 28 in the front and back direction.
1 is also unnecessary.

Furthermore, FIG. 9 shows another embodiment of the forced slide mechanism 32, which is mounted integrally on the moving frame 16. Specifically, the hydraulic cylinder 33 is moved with its axis directed in the front and rear direction. It is fixed to the lower surface of the movable frame 16, and a guide frame 351 of the hook pin 35 is fixed to the front side of the movable frame 16, so that it can be moved left and right together with the movable frame 16. 352 is a connector for connecting the hook pin 35 to the piston rod 34.

If such a configuration is adopted, the guide rod 37 and screw rod 3
8. A servo motor that rotates the screw rod 38 and a frame body 3
6 becomes unnecessary, and the control operation of the forced slide mechanism 32 is simplified, and accuracy can also be improved.

It goes without saying that the configuration shown in the above embodiments can be applied not only to wing henders but also to press brakes and even coki henders.

Next, the operation of the above embodiment is shown in Figs. 5, 6, and 7 (a).
I will explain based on the north (ho).

FIG. 5 shows a case where both corner blocks 7.12 and all intermediate split molds 8.13 between them are used to form an upper mold of maximum length (for example, 12,000 mm).

If the length of the workpiece needs to be changed from this state, the actual length of the upper die is changed by the following operation. For example, if you want to bend the short side of 575mm, you will need to reduce the length of the upper die by 625mm in total, including 12 first intermediate split molds and 5 second intermediate split molds.The procedure is as follows. becomes.

First, from the state shown in FIG. 5, the fluid pressure cylinder 31 that moves the fluid pressure cylinder 17 of the other corner block 12 and the tailgating mechanism 28 back and forth is operated to move the other corner block 12 and the second intermediate split mold 13... All the first intermediate split type 8...
Retire to the standby position one step behind the back (Figure 7-a). Next, the moving frame 16 is moved to one corner by rotating the screw rod 15 by operating the servo motor.
At the same time, the forced slide mechanism 3
2 by operating the servo motor and rotating the screw rod 38, the 12th piece of the first intermediate split mold 8 (one corner block 7
From the side, slide it horizontally to the back of the first intermediate split mold for the 7th time (Figure 7 opening).

Next, operate the fluid pressure cylinder 33 to insert the hook pin 35 of the forced slide mechanism 32 into the engagement hole 11 of the twelfth first intermediate split mold 8 (see Figure 7). The servo motor is rotated in the opposite direction to horizontally slide the frame 36 in the original direction. This results in 12 first
The intermediate split molds 8... are pushed away from the first corner block 7 to form a gap between the sixth and seventh corner blocks. The operation of the servo motor is stopped when this distance reaches the sum of the other corner block 12 and the four second intermediate split molds 13.

Next, move the moving frame 16 by moving the servo motor in the opposite direction to the side away from the one corner block 7, and move it from the sixth first intermediate split mold 8 to the other corner block. 12 and a second intermediate split mold 13 connected thereto.
...The servo motor stops when the four pieces protrude to the right in the figure, that is, when they reach the rear of the above-mentioned interval,
The moving frame 16 stops (FIG. 7C).

Next, the fluid pressure cylinder 20 of the model number selection mechanism 18 operates to push the pusher 19 forward. This extrusion amount is such that the front end of the second intermediate divided mold 13...
Approximately 3m in front and back of the rear position of...
It is set at around 6mm in total.

The second intermediate split mold 1 is formed by the pushing action of the pusher 19.
3... are all pushed forward, but the 5 pieces on one corner block 7 side are pushed forward by the 6th first intermediate split mold 8.
・ exists, so the second intermediate part δ of these five sheets is type 1
3... is the 6th first intermediate split type 8... whose front end is the 6th one.
comes into contact with the back of the However, since the pusher 19 is pushed further forward, the four sheets that should be selected are pushed further forward, but the five unnecessary sheets are affected by the buffer structure 21 provided on the pusher 9, that is, through the pins 24. The spring 23 is elastically contracted to allow the forward movement of the needle 19, thereby causing the second intermediate split mold 13 to move forward.
The selection of... is completed (7th part 2).

When the selection of the second intermediate split molds 13 is completed, the fluid pressure cylinder 30 of the tailgating mechanism 28 is activated, and the hook pin 29 protrudes from the through hole 2 of the second intermediate split mold 13.
6... will be inserted. In this case, the four selected intermediate split molds 13 protrude slightly forward, and the five through holes 26 of the group and the five molds that are in contact with the back surface of the first intermediate split mold 8... The second intermediate split mold 13... group of through holes 26...
Since the former is kept in a relative position that protrudes slightly forward, after inserting the hook pin 29 up to the fourth through hole 26 of the former, the front end is inserted into the second through hole of the fifth. When it comes into contact with the side surface of the intermediate split mold 13, further protrusion is inhibited, and the protrusion operation is automatically stopped.

Next, the fluid pressure cylinder 31 that moves this tailgating mechanism 28 back and forth and the fluid pressure cylinder 17 that moves the other corner block 12 forward are operated together, and the four intermediate split molds 13 selected... The other corner blocks 12 are both pushed forward until their front ends coincide with the front ends of the first intermediate split molds 8 .
Press sideways to each corner block as well as the first. The second intermediate split molds 13 are formed into a series of molds closely arranged in parallel, thereby reducing the length of the upper mold (FIG. 7-E, FIG. 6).

Incidentally, in order to return from the state shown in FIG. 6 to the state shown in FIG. 5, the other corner block 12 and the four second intermediate split molds 13...
and the first fluid pressure cylinders 17 and 31 respectively.
Retire it to the standby position behind the back of the intermediate split type 8...

At this time, the four second intermediate divided molds 13 at the rear end are moved back to the same position as the remaining five second intermediate divided molds 13 by the tailgating mechanism 28. When the through holes 26... of 5 are aligned on the same straight line, the hydraulic cylinder 30 is actuated to further extend the hook pin 29.
They are inserted into the through holes 26 of the second intermediate split molds 13, and then all nine molds are retreated to the standby position at the rear of the upper mold body 5.

Next, the forced slide mechanism 32 is moved to the rightmost rear of the excluded 12 first intermediate split molds 8, and the hook pin 35 is inserted into the retaining hole 1 of the split mold 8 to engage it. Then, the forcible slide mechanism 32 is moved toward one corner block 7 side, and these 12 divided molds are brought together and arranged side by side in a series near the selected six divided molds, and then the Pull out the hook pin 35 and force slide mechanism 3
2 to the right, the moving frame 16 is also moved to the right, and the other corner block 12 and the second intermediate split mold 13...
・After moving the group to the right, move them to the first intermediate division type 8
. . to the rightmost side, and by the operation of the jerk clamper 39, both corner blocks and the first and second intermediate split molds are placed closely side by side and returned to their original positions.

The above upper mold length can be changed depending on the side length of the workpiece.
Needless to say, this can be easily done by push button or NC control.

Moreover, in the modified example of FIG. 8, the selected second intermediate division type 1
3... The group can be moved back and forth integrally with the other corner block 12 by the operation of a fluid pressure cylinder 17 that moves the other corner block 12 back and forth, and in the modification shown in FIG. The horizontal movement (reciprocating movement along the longitudinal direction of the upper mold body) of the forced slide mechanism 32 is controlled by the movement of the moving frame 16.

(Effects) In the present invention, a structural device for moving each of the first intermediate divided mold 8, the second intermediate divided mold 13, and the other corner block 12 is installed in the upper mold main body, etc. By making the device an external type instead of a regular one, the overall structure of the device can be simplified and downsized, and it has the advantage of being easier to repair and inspect. Also, it is possible to horizontally slide the first intermediate split mold 8... with a single forced slide mechanism, and even though it is an exterior type, there is a forced slide mechanism on the back side of the ram, and a forced slide mechanism on the other side. Corner block 12, second intermediate split mold 1
3...And because of these actuating devices, it is difficult for uneven loads to occur on the ram, so there is an advantage that further miniaturization can be achieved.

Also, the first intermediate divided mold 8... is moved left and right along the guide groove 6, and the other corner block 12 and the second intermediate divided mold 1 are moved horizontally along the guide groove 6.
3. Because the width setting is done by pushing forward only, the front edges of each intermediate split mold and both corner blocks are aligned neatly in a straight line after being set, and the Unlike a rotary type, the front edge of the split mold will be uneven in a zigzag pattern due to differences in rotation angle due to manufacturing errors of individual parts, and this will not cause uneven patterns on the folded corners of the workpiece, making it possible to create clean corners. Can be formed.

As shown in the embodiment, if the forced slide mechanism 32 is provided on the moving frame 16, the overall structure can be simplified and lightened, and the ease of operation can be further improved. By installing the interior in 12, it can be made much more compact, and since it is a type in which all of these are attached to the moving frame, it is easier to manufacture and process, and furthermore, to assemble at the delivery destination. It has the advantage of being greatly simplified, easy to handle in transportation, etc., and advantageous in terms of cost.

[Brief explanation of the drawing]

Fig. 1 is an enlarged perspective view of the main part, with the moving frame and various devices above it omitted; Fig. 2 is an enlarged perspective view of the main part, which also shows the moving frame and various devices above it; Figure 3 is a side view of the forced slide mechanism, Figure 4 is a partially cutaway enlarged sectional view of the buffer structure, Figures 5 and 6 are front views of the upper mold, respectively, and Figures 7 (a) to (e) are FIG. 8 is a cross-sectional view showing a modification of the tailgating mechanism, and FIG. 9 is a cross-sectional view of essential parts of a modification of the forced slide mechanism. 1; upper mold, 2; lower mold, 4; ram, 5; upper mold body, 6; guide groove, 7; one corner block, 8; first intermediate split mold,
11; Retaining hole of first intermediate divided mold, 12; Other corner block, 13; Second intermediate divided mold, 16; Moving frame, 18; Mold number selection mechanism, 19; Pusher 120; Fluid pressure cylinder,
21; Buffer structure, 23; Spring, 24; Pin, 28
; Tailgating mechanism; 29; Hook pin; 30; Fluid pressure cylinder; 31; Fluid pressure cylinder; 32; Forced slide mechanism;
33; fluid pressure cylinder, 34; piston rod, 35;
hook pin.

Claims (4)

[Claims] (1) Depending on the length of the workpiece, the required number of split upper dies installed at the lower end of the ram are brought into close contact to determine the length of the upper die, and the upper die and lower die are combined to form wings. In a bending machine that bends the edge of a workpiece in cooperation with a beam, one corner block 7 is suspended from the lower surface of the ram 4, and a guide groove 6 is provided along the ram's longitudinal direction on the lower surface to allow lateral movement. A large number of first intermediate divided molds 8 are freely suspended, and these first intermediate divided molds 8 are selectively and removably engaged with holes 11 provided on the back surface of the first intermediate divided molds 8. These first intermediate split molds 8...
A forced slide mechanism 32 equipped with one hook pin 35 for forcibly moving laterally is provided on the back of the upper mold, and the other corner block 12 and the first intermediate divided mold 8...a large number of thinner second intermediate divided molds A movable frame 16 is installed on the back of the ram and forcibly moved laterally, and the other corner block 12 is formed into a first intermediate split mold. The group of divided molds 13 is configured such that it can be forcibly moved in and out from the back rear side of the second intermediate divided mold 13 toward the front. Split type 8・
A pusher 19 is provided to manage the extrusion in the mold number selection movement process from the rear of the back surface to slightly forward of the rear surface existing position, and the pusher 19 corresponds to each of the second intermediate split molds 13. A buffer structure 21 is provided which elastically absorbs the forward resistance of the divided molds 13 during the mold number selection movement process and allows the pusher 19 to push forward. Split type 13: A folding width changing device for a folding machine characterized by being provided with a tailgating mechanism 28 that collectively pushes the group further forward. (2) The tailgating mechanism 28 has an axis extending along the longitudinal direction of the upper die main body 5 between the through hole 26... provided through the front end of the second intermediate split mold 13... and the upper part of the other corner block 12. Claim (1) consisting of a fluid pressure cylinder that is internally installed and allows the piston rod 312 to move outwardly and retractably.
A device for changing the bending width of the bending machine described in 2. (3) The forced slide mechanism 32 includes a hydraulic cylinder 33 fixedly connected to the moving frame 16 and a hook pin 35 that is moved in and out by the hydraulic cylinder 33. Width change device. (4) The folding width changing device for a folding machine according to claim (1), wherein the movable frame 16 is provided with a tailgating mechanism 28 and a forced slide mechanism 32.