JPH0741337B2 - Sheet processing knife bending machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention punches a sheet such as paper, a plastic sheet, a corrugated cardboard into a predetermined shape by punching press working or the like,
Automatically predetermines thin-walled strip-shaped sheet processing knives and creases used to make creases (which are used to make creases without a blade formed on the end face and are included in the concept of knives below) The present invention relates to a bending apparatus for a sheet processing knife used in a forming apparatus for cutting into a shape and performing bending processing.

[Prior art]

In recent years, the automation of punching and making creases of corrugated cardboard and cardboard into various shapes has been rapidly advancing.

This is primarily a computer aided design system (CAD)
It depends on the development.

In such a sheet processing apparatus using CAD, first, a drawing such as a box development drawing for punching is created, and this is stored in a computer as numerical data. Using the punching die drawing data stored in the computer, the knife holding groove of the knife holding table for setting the knife is processed by the laser processing machine.

FIG. 18 is a perspective view showing a knife holding groove b formed by the laser processing machine on the knife holding base a and a knife n fitted in the knife holding groove. The knife n has a bridge portion c.

The present invention provides a bending apparatus in a sheet forming knife forming apparatus, which is capable of automatically cutting and bending the knife n as described above based on numerical data obtained by the CAD or the like. It is a thing.

An example of a knife forming apparatus which is the background of the present invention is a stock device for stocking long thin plate-shaped knife materials in layers and stocking one knife material from the stocking device and supplying it to a subsequent material feeding device. A material feeding device for feeding, and a material feeding device for feeding the knife material fed to the subsequent shearing device by a predetermined length while keeping the knife material in a horizontal state,
A shearing device comprising a plurality of shearing dies having a shape corresponding to various knife end shapes, and shearing the knife material fed by the material feeding device in a horizontal state,
A knife feeding device that feeds the sheared knife to the succeeding posture changing device, a posture changing device that changes the posture of the fed knife so that its tooth tips face upward, and the knife is passed from the posture changing device. And a bending device for bending the knife with a plurality of bending dies each having a shape corresponding to various knife bending shapes.

The knife in the present invention is a concept including ruled lines.

In the bending apparatus as described above, the long thin plate knife materials arranged in layers in the stock device are sequentially supplied to the material feeding device one by one by the material supplying device. At this time,
Care is taken not to damage the cutting edge of the knife.

On the other hand, in the shearing device in the post-process, since the material must be kept horizontal, the material feeding device that feeds the material from the stock device to the material feeding device removes the knife material from the stock device and then removes the knife material. Orient it horizontally and feed it to the material feeder in that state.

In a shearing device that shears a knife material to form each knife, the knife material is sheared into a predetermined size according to numerical data stored in CAD. Therefore, the material feeding device feeds the material of a predetermined length into the shearing device according to the data sent from the CAD, and shears the end face and the bridge portion.

There are several types of machining shapes on the knife end surface, and the shearing machine is equipped with a plurality of shearing dies having a shape adapted to such various knife end shapes. Which shearing die should be used? Selected according to data from CAD.

The knife sheared by the shearing device remains in a horizontal state, but thereafter, in order to bend the knife in accordance with the shape of the knife holding groove b, it is easier to hold the knife in a vertically standing state. . Therefore, the sheared knife is sent to a posture changing device that changes the posture of the knife by the knife feeding device. The knife is now repositioned so that its cutting edge faces upwards and passed to the knife positioning device.

As shown in FIG. 18, the bending position, bending angle, and roundness of the knife should be the same as those of the knife holding groove b. As described above, various combinations of the bending angle of the knife and the size of its roundness can be considered depending on the pattern of the punched sheet.Therefore, the bending apparatus for bending the knife has a shape suitable for various knife bending states. It has multiple bending dies, and the bending dies to be used are selected based on the information from CAD.

In this way, the properly held knife was bent by a selected bending die, and a knife having an arbitrary shape that fits into an arbitrary knife holding groove as shown in FIG. 18 was formed. After that, the sheet is discharged by a discharging device to a carrying device such as a conveyor.

[Problems to be Solved by the Invention]

If the knife is to be bent only once, it may be bent by gripping an arbitrary position of the supplied knife with a bending die. However, when a knife is bent more than once, it is usually bent using an expensive mold, so a mold is required each time the bending radius or bending angle changes, which is extremely uneconomical. there were.

Therefore, an object of the present invention is to prepare bending dies corresponding to various bending states, replace the bending dies, and perform bending once to perform a plurality of bending processes on one knife. It is to provide a knife bending apparatus that can be performed.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a sheet bending knife bending apparatus that presses a sheet processing knife supplied in a vertical state on a bending surface plate with a pair of bending dies to perform bending. Die retracting means for retracting the bending die in the bent state from the bending surface plate, die opening and closing means for opening and closing the bending die protruding from the bending surface plate, and gripping the tip side of the bending direction of the knife in the supply direction. By opening and closing the pair of knife gripping claws that direct the end of the knife in a certain direction.
Knife holding means for gripping, and knife positioning means for engaging with the leading end of the knife in the feeding direction and moving the knife on the bending platen to position it with respect to the bending die. It is configured as a bending device for a characteristic sheet processing knife.

[Operation] When the knife is supplied to the bending surface plate in the vertical state, the bending die in the open state projects from the bending surface plate before and after this (die retracting means).

 The knife gripping claw is opened (knife gripping means).

The knife passed between the bending dies is positioned with respect to the dies (positioning means).

After the bending die is closed and the bending process is performed, the bending die is opened and the knife is released from the die (die opening / closing means).

The bending die sinks under the surface plate (the die is exchanged here if necessary) (die emergence means).

The knife gripping claw is closed and the knife end is directed in a predetermined direction (knife gripping means).

When performing the bending treatment two or more times below,
The process of is repeated.

The above operation sequence is an example of the operation of the present invention.

For example, it is possible to appropriately change the above-mentioned operations within a range where they do not contradict each other, such as replacing with.

〔Example〕

Next, examples embodying the present invention will be described to provide an understanding of the present invention. The following examples are merely specific examples of the present invention, and do not limit the technical scope of the present invention.

16 and 17 are a front view and a plan view showing a schematic configuration of the entire knife forming apparatus according to an embodiment of the present invention.

As shown in these figures, this apparatus is configured such that a knife material is sheared to a predetermined length and a bridge portion is punched, and a shearing step portion 1 that bends each cut knife and a bending step portion 2 and both. It is composed of a knife conveyor 3 such as a conveyor belt that connects processes.

The shearing process section 1 includes a device 4 for arranging and stacking long thin plate knife materials in layers. Stock apparatus 4 in this example is more configured knife stock unit 4 _a stocking knife material formed of the blade on the end face, and ruffled stock unit 4 _b stocking ruling not formed with the blade on the end face . The knife stock unit 4 _a and crease the stock unit 4 _b is provided lifting table 5 is driven vertically to allow stopped at a predetermined position on the material supply apparatus to be described later. Reference numeral 6 is an air cylinder for driving up and down.

On the front surface of the stocking device 4, there is provided a material feeding device 8 which takes out the knife materials including ruled materials arranged in the stocking device 4 one by one and supplies them to the material feeding device 7 below the knife materials.

Material feeding device 7 provided below the material supply device 8
Is for feeding the supplied material to the subsequent shearing device 9 while keeping the material in a horizontal state, and the feeding amount is set to a predetermined amount based on the CAD data as described above. Therefore, the material feeding device 7 is provided with a feed screw or the like for accurately controlling the feeding amount of the material, and firmly holds the end portion of the knife material even in the state of being processed by the shearing device 9. It is equipped with a powerful clamp device that can be gripped.

The knife material fed out by the material feeding device 7 by a predetermined amount is inserted into a shearing device 9 and sheared by various shearing dies according to various knife end shapes. Usually, the shearing process of the knife material as described above includes a case of cutting into a taper in the positive direction, a case of cutting into a taper in the reverse direction, and a case of cutting into a special shape called decorative processing. Further, the ruled lines are also cut in a corresponding special manner.

Thus, in this illustrated example the cutter block 9 equipped four different shear die _a, 9 _b, 9 _c, 9 _d are arranged, these cutters base 9 _a to 9 _d are of said material feeding device 7 It is moved in the direction perpendicular to the transport direction and used selectively. Further, the cutter block 9 _a to 9 _d dedicated cutter base 9 _e for performing bridging processing in the conveying direction upstream side relative to said cutter block 9 _a ~
It is provided retractably in the same direction as 9 _d.

Each knife cut out in one of the cutter base 9 _a to 9 _d are the fed to the knife transport unit 3 by a small belt for conveying discussed after is provided at the conveying direction downstream side of the cutter block.

The knife transport unit 3 in this example is embodied by _a transport belt 3a.

The knife conveyed by the conveyor belt 3 _a is sent to the bending section 2 and passed to the knife posture changing device 10. The posture changing device 10 changes the posture of a knife fed in a horizontal state so that its blade edge faces upward, and then transfers the knife to a subsequent knife positioning device 11. As described above, there is no inconvenience that the knife blade edge is rubbed upward and is bent in that state, so that the knife blade edge is rubbed against the bending platen or the like.

The knife, which is positioned and held at a predetermined position by the knife positioning device, is gripped by the shearing die of the bending device 12 and formed into an angle and a roundness according to the shape of the shearing die. Bending position and bending angle of such a knife,
Furthermore, the degree of roundness used is specified by CAD according to the pattern of the sheet to be punched.

Therefore, bending is applied to the predetermined position of the knife set by the punching knife positioning 11, and the bending angle and the degree of roundness according to the shape of the selected bending die are given to the knife and set by CAD. The knife is cut and bent to obtain any cuts or folds made.

The bent knife is discharged to a conveyor 14 which is a conveying means by a gripping device 13 having a claw at its tip. The gripping device 13 forms a part of the bending device which is the object of the present invention.

The following description is for the parts subsequent to the posture changing device 10 shown in FIG. 16 and FIG. FIG. 4 is a plan view showing an apparatus for bending the knife, the blade of which is directed upward by the above-described posture changing apparatus, on the bending surface plate 120.

As shown in FIG. 4, an electromagnet bar 110 for adsorbing and transporting the vertical work W delivered from the posture changing device 10.
Is connected to a rodless cylinder 119. By driving the rodless cylinder 119, the work W attracted to the electromagnet bar 110 is moved to a predetermined position on the bending surface plate 120. Frame 121 is mounted on the bending plate 120, as shown in FIGS. 4 and 5, the screw 123 carried by bearings 122 _a, 122 _b is rotatably provided. The carrying screw 123 is rotationally driven by a motor 124 connected to the rear end, and the rotation causes the screw block 125 screwed in the middle to be conveyed in the axial direction.
The screw block 125 has a holding bar 126 at its lower end. The bracket 127 is attached to the tip of the holding bar 126.
The upper permanent magnet 128 _a and the lower permanent magnet 128 _b are attached via.

Thus, by rotating the stroke screw 123 by the rotation control of the motor 124, the processing surface plate bending permanent magnets 128 _a, 128 _b
It can be moved along the top surface of 120 and positioned in place.

The carrying screw 123, the holding bar 126, the permanent magnet 128 and the like constitute the knife positioning device 11.

FIG. 6 is a view of the knife positioning device 11 as described above as viewed from the direction of the permanent magnet 128.

Therefore, the knife n attracted by the electromagnet bar 110 is bent by the rodless cylinder 119 by the bending surface plate 120.
At the same time as coming up, the knife positioning device 11
The motor 124 rotates, and the rotation of the carrying screw 123 causes the permanent magnet 128 to advance together with the holding bar 126 toward the end of the knife n. When the permanent magnet 128 comes into contact with the tip of the knife n, the power supply to the electromagnet bar 110 is cut off and the knife n is attracted to the tip of the permanent magnet 128. At this time, as described above, the knife n has its cutting edge facing upward and is in a state along the axis of the permanent magnets 128 _a and 128 _b .

The delivery of the knife n from the electromagnet bar 110 to the permanent magnet 128 is performed by projecting from the two holes 129 and 129 formed in the bending surface plate 120 onto the upper surface of the bending surface plate 120 as shown in FIG. wherein the two bending dies 116 _a, 116 a knife n in the gap between the _b is performed in a state of being inserted to. When the delivery of the knife n from the electromagnet bar 110 to the permanent magnet 128 is completed, the rodless cylinder 119 operates in the reverse direction to return the electromagnet bar 110 to the original position, and prepare for the next attraction of the knife.

When transfer of the knife n is completed, the motor 124 is rotated to a predetermined rotation angle, its tip to the permanent magnet 128 is positioned at a predetermined position relative to the knife n is the bending die 116 _a and 116 _b which are adsorbed.

The bending die 116 _a and 116 _b are held in bending column 130 shown in Figure 11-Figure 15. The bending column 130 has a sliding groove 131 on the inner surface thereof, and the sliding groove is formed in a box-shaped frame pair 132.
Two holding blocks 133 _a , 13 that are slidable guided by 131
The 3 _b accommodating, in which each fitted with the bending die 116 _a, 116 _b to the respective holding blocks 133 _a, 133 _b. The holding block 133 _a, 133 _b is by a compression spring 134 which is Chijimigi therebetween, always both bending dies 116 _a, 116 _b is held at a constant distance apart state.

A plurality of such bending columns 130 are attached to a column attachment drum 135, which will be described later, shown in FIGS. 7 to 10. This column mounting drum 135 is the same as the bending surface plate 120.
The bending column 130 is rotatably accommodated under the column, and the bending column 130 can be raised and lowered by an air cylinder 136 provided in the column mounting drum 135.

The bending dies 116 _a and 116 _b shown in FIG. 4 are the result of the bending column 130 being lifted by the air cylinder 136.
The holes 129, 129 are projected above the bending surface plate 120.

In the frame 137 provided below the bending surface plate 120,
As shown in FIG. 9, there are provided a pair of L-shaped arms 139 and 139 swingable about a pair of vertical pins 138 and 138. The above L-shaped arms 139 and 139 are formed by a bracket 140.
It is connected to a piston rod 142 of a hydraulic cylinder 141 which is swingably attached to the frame 137 via. The other ends of the L-shaped arms 139, 139 are connected to the frame 1
It is connected via joints 145, 145 to pressing rods 144, 144 guided slidably by guide blocks 143, 143 provided in 37. The push rod 144, 144 is intended for pressing in the direction of the holding block 133 bend column 130 _a, 133 _b to press the bending die 116 _a, 116 _b each other party.

Therefore, the hydraulic cylinder 141 operates to retract the piston rod 142, whereby the L-shaped arms 139, 1
39, and push rods 144, 14 connected to it.
Advance 4 in the direction in which both approaches. The bending die 11 thereby caused to close the holding block 133 _a, 133 _b that contacts the push rod 144, provided in two holding blocks
6 _a, 116 _b and is pressed against one another, subjected to bending to the knife n sandwiched therebetween. At this time, the knife n is held by both the bending dies 116 _a and 116 _b and bent into an L shape, so that the tip of the knife n is separated from the permanent magnet 12.

Thus, the bending of the knife n is completed, the hydraulic cylinder 141 is actuated in the opposite direction, the knife n is released from the holding by both bending dies 116 _a, 116 _b, the two of the bending plate 120 It is placed between the holes 129 and 129.

In order to perform another bending process again on the predetermined position of the knife n which has been bent once, the tip end of the knife n is again attracted to the permanent magnet 128 of the knife positioning device 11 and moved to the predetermined position. Although must, at the time of bending by the bending die 116 _a, 116 _b as described above is finished, as shown in broken lines n 'in FIG. 4, the tip of the knife deviates from the advancing axis of the permanent magnet 128 Therefore, the direction of the end of the knife n on the side attracted by the permanent magnet 128 must be corrected to the advancing direction of the permanent magnet 128. Correcting the direction of such a knife is
This is the role of the knife direction correcting device 117.

Next, the knife direction correcting device 117 will be described with reference to FIGS. 1 to 3.

As a main component of the knife direction correcting device 117 described below, the grip claw 180 also constitutes a part of the knife discharging device. The distal end portion of the frame 181 provided on the bending plate 120 in Figure 1, are attached perpendicular linear guide rail 182 with respect to forward and backward directions of the permanent magnets 128 _a, 128 _b. A piston rod 186 of a standby cylinder 185 is fixed via a bracket 184 to a guide block 183 slidably fitted to a linear guide rail 182. A slide table 187 is further fixed to the piston rod 186.

This slide table 187 is a slide base 188 described later.
Is a linear guide that guides and supports the linear guide rail 182 at a right angle. A suction plate 189 and a bracket 190 described later are fixed to the slide table 187. The block 191 attached to the bracket 190 is connected to the piston rod 193 of the discharge cylinder 192 in the same direction as the linear guide rail 182, and the function of the discharge cylinder 192 causes the block 191, the bracket 190, the suction plate 189,
Slide table 187, standby cylinder 185, bracket 184,
The guide block 183 is guided by the linear guide rail 182 and integrally slides in the longitudinal direction of the linear guide rail 182.

The slide base 188 is fixed to the standby cylinder 185 via a bracket 194. Above slide base 1
A compression spring 196 is compressed between the spring mount 195 fixed to 88 and the slide table 187, and the slide base 188 is constantly elastically biased to the left in FIG. 1 by the compression spring 196.

Brackets on the lower surface of the slide base 188 197 _a, 197 _b
A guide shaft 198 provided in the operating direction of the standby cylinder 185 is attached via the. A slide block 199 is slidably mounted on the guide shaft 198. A slide plate 200 is fixed to the slide block 199 as shown in FIG.

Holes 201 _a formed at the left and right ends of this slide plate 200
The piston rod 203 _b of the piston rod 203 _a and the closed cylinder 202 _b of each of the opening cylinder 202 _a fixed to the lower surface of the slide base 188 is loosely fitted in and 201 _b.
Further, in the state of FIG. 2, the piston rod 203 _a
The collar 204 _a provided at the tip of the slide plate abuts on the right side surface of the slide plate 200, and the collar 204 _b provided at the tip of the piston rod 203 _b abuts on the left side surface of the slide plate 200.

Further, one end of the wire 206 passing through the attached to the slide base 188 rollers 205 _a, 205 _b, 205 _c are engaged in the slide block 199. A weight 207 is hung on the other end of the wire 206, and the load of the weight 207 constantly urges the slide block 199 to the right in FIG.

Further, the lower end of the hinge shaft 208 which is fixed vertically at the left end in FIG. 1 are two hinges 209 _a, 209 _b as shown in FIG. 2 mounted rotatably in the slide base 188 ing. Each hinge 209 _a, 209 _b link respectively 210
Pin 2 planted in slide block 199 via _a , 210 _b
It is connected with 11.

Furthermore, each of the aforementioned hinge 209 _a, 209 _b gripping jaws 180 _a and 1
80 _b is mounted as shown.

Therefore, when the slide block 199 slides to the right or left in FIGS.
0 via the _a and 210 _b by opening and closing hinges 209 _a and 209 _b until two-dot chain line position from the solid line position in Figure 2 gripping claws 180 _a and 18
0 _b opens and closes.

The state shown by the solid line in Figure 2 press slide plate 200 to the left to advance the piston rod 203 _a of the opening cylinder 202 _a, the gripping claws 180 _a and 180 _b opened maximally, as shown by the solid line in FIG. It is in a state of being When retracting the piston rod 203 _a of the opening cylinder 202 _a from this state, the slide plate 20
0 is pulled by the weight 207 and moves leftward in the figure. Thereby gripping jaws 180 _a and 180 _b is closed. To ensure movement of the closing direction of the slide plate 200, its piston rod by operating a closing cylinder 202 _b
The 103 _b is retracted, but is certainly slid rightward slide plate 200, the closed cylinder 202 _b of the piston rod
203 _b does not retract the gripping claws 180 _a and 180 _b to the fully closed position. Therefore, the force for gripping the knife n by the gripping claws 180 _a and 180 _b is determined by the load of the weight 207.

To open the gripping jaws 180 _a and 180 _b in the reverse, first, closed cylinder
After the piston rod 203 _b was advanced to the solid line position of FIG. 2 to 202 _b is operated to actuate the opening cylinder 202 _a is advanced the piston rod 203 _a to the solid line position, the slide plate 200 second Push it to the left limit position shown by the solid line in the figure.

Next, the operation of the above embodiment will be described. The following operation is started from the state where the knife n to be bent is adsorbed to the electromagnet bar 110 and the knife n advances as the electromagnet bar 110 advances. Further, the column mounting drum 135 in this state is rotated to a predetermined position, the first bend bent is set to bend angles required for machining dies 116 _a and 116 _b to knife n for future bending
Bending column 130 with is at the top.

In this state, the air cylinder 136 first advances and the bending die 1
Remain 16 _a and 116 _b is open, the bending plate 120 hole
It projects upward from 129,129. At this time, the lock electromagnet 1
81 is in the off state, the standby cylinder 185 is turned on, and the slide base 188 attached to the standby cylinder 185 via the bracket 194 and the slide base 1
Open the cylinder 202 attached to 88 _a, the closed cylinder 202 _b,
Slide plate 200, the gripping claws 180 _a, 180 _b are all in the standby state moving in the right direction in FIG. 1 integrally. At this time, open cylinder 202 _a and a closed cylinder 202 _b are both its piston rod is in the advanced position, the gripping claws 180 _a and 180 _b is in a state of open.

When the above standby state is completed, the standby cylinder 185 is turned off, whereby the force of the compression spring 196 causes the slide base 188 and the gripping claw 180 attached thereto.
_a, 180 _b, etc. is moved to the left in FIG. 1 as a complete, in an open position gripping jaws 180 _a and 180 a are backside of _b bending die 116 _a
A and 116 _b , and slide base 18
8 stops. By moving in this way to gripping jaws 180 _a and a left direction until is brought into contact with the side surface of the bending die 116 _a and 116 _b to 180 _b, the instrumentation Iricho knife n to the bend die 118 _a and 118 _b Even in a very short place, the aligning operation and the discharging operation after bending can be performed. Incidentally, the gripping claws 180 _a, 180 _b to the semi-cylindrical groove 180 _a which can be charged with the permanent magnets 128 _a is ', 180 _b' is formed. As a result, it is possible to handle a case where the charging length of the knife n is short.

At this time point, the lock electromagnet 181 is excited, and the attracting plate 189 integral with the guide block 183 is attracted to the lock electromagnet 181 so that the slide base 188 and all the members attached thereto are shown in FIG. You will not be able to move to the left or right. In this way, to secure the slide base 188 by the locking electromagnet 181, the bending die 116 _a and 116 _b in a later process retracted inside the bending plate 120 for the exchange of dies, compression spring 196 the force is to prevent forward more than necessary gripping jaws 180 _a and 180 _b.

Permanent magnets 128 _a and 128 _b by the action of the carrying screw 123 by motor 124 shown in the FIG. 5 at this time is advanced to the left position in FIG. 1, the bending die 116 _a and
Adsorbs tip of the knife n plugged between 116 _b, which is positioned at a predetermined position. FIG. 1 shows a state in which positioning has been completed.

When the positioning of the knife n is completed, the energization to the electromagnet bar 110 that has carried the knife n in a vertical state is turned off, the magnetic force is released, and the electromagnet bar 110 is released.
Moves to the standby position shown by the solid line in FIG. This time the permanent magnets 128 _a and 128 _b are bent in the retracted to a predetermined position required for machining, is placed in a state of processing immediately before bending knife n. Thus, for a knife n being positioned while keeping the vertical state by the permanent magnets 128 _a and 128 _b,
The die 161 _a and 161 _b is operated bent by actuation of the hydraulic cylinder 141, bending of a predetermined angle at a predetermined position of the knife n is performed subsequently, bending dies 161 _a and 161 _b is retracted.

Thus, when the bending is completed, the permanent magnets 128 _a and 128 _b is retracted to a predetermined standby position, and the bending die 16
The operation of the air cylinder 136 causes 1 _a and 161 _b to sink into the lower side of the bending surface plate 120.

In this state, since the knife n is bent, it is placed on the bending surface plate 120 without falling. Therefore, first, the opening cylinder 202 is actuated to retract its piston rod 203 _a. Thus retracts the slide plate 200 is pulled to the weight 207, hinges 209 _a and 209 _b and the gripping claws 180 _a attached thereto, 180 _b goes closed. Closing cylinder 202 _b is operated to assist in this movement, the piston rod 203 _b is retracted, the gripping claws 180 _a, 180 _b are forced closed. This grip claw 180 _a ,
180 knife n after a state shown in the placed bent by the two-dot chain line by the closing operation in the second view to that of _b is rotated by being pushed by the gripping claw 180 _a and 180 _b, the distal end n _a is directed in the direction of forcing the permanent magnets 128 _a and 128 _b.

If it is only performed once bent against knife n, bending with gripping claws 180 _a, 180 _b of the knife n which is gripped by the gripping claws 180 _a and 180 _b as described above by the operation of the cylinder 191 The knife n after being bent is discharged to the outside of the processing surface plate 120 and is placed on the conveyor 14 provided outside the bending surface plate 120.
Should be dropped.

If the further out the above bending twice, in a state of gripping the leading n _a knife n by the gripping claws 180 _a and 180 _b, to advance the permanent magnets 128 _a and 128 _b, the knife n Adsorb to the end of the tip n _a . Then, the closed cylinder 202 _b
Advancing the, and by advancing the opening cylinder 202 _a, to advance the slide block 199 to the left, the grip claws 1
Opening the 80 _a and 180 _b. Hereinafter, the locking electromagnet 181 is turned off, the gripping claws 180 _a, 180 _b is moved to the standby position by the standby cylinder 183, the bending further suitable for subsequent bending die 16
Increase 1 _a and 161 _b . Since the subsequent bending operation is the same as the first bending operation, the description thereof will be omitted.

In addition, even in the second bending operation, the grip claws as described above are used.
In 180 _a, 180 _b by not directing the knife tip n _a in the direction of the permanent magnets 128 _a, 128 _b, and the permanent magnets 128 _a, 128 _b When accurately positioning the position of the knife by the gripping claws 180 _a, 180 _b The accurate bending operation can be repeated many times as long as it can be grasped.

After the final bending process, open cylinder 20
Retracting the 2 _a, and by retracting the closing cylinder 202 _b, closing the gripping claws 180 _a, 180 _b, the end of the knife n after completion of machining bending by the force of the weight 207 by the gripping claws 180 _a, 180 _b While holding the part n _a , the discharge cylinder 192 is operated to operate the standby cylinder 185, the slide table 187, the open cylinder 202 _a , the closed cylinder 202 _b , the hinges 209 _a and 209 _b , and the grip claws 180 _a and 180 _b . move on to the delivery conveyor provided outside of the bending gripped knife n working surface plate 120, the gripping claws 180 _a, 1
_80b is opened and the knife n is dropped on the conveyor 14. After the knife n drops, the discharge cylinder 192 is retracted to return to the initial standby state.

〔The invention's effect〕

INDUSTRIAL APPLICABILITY As described above, the present invention, in a bending apparatus for a sheet processing knife that presses and bends a sheet processing knife that is vertically supplied onto a bending surface plate with a pair of bending dies, in an open state. Die retracting means for retracting the bending die from the bending surface plate, die opening and closing means for opening and closing the bending die protruding from the bending surface plate, and grasping the tip side in the supply direction from the bending portion of the knife. The knife gripping means for opening and closing the pair of knife gripping claws for orienting the end of the knife in a fixed direction by means of releasing and gripping the knife, and engaging with the leading end of the knife in the supply direction,
A sheet bending knife bending apparatus comprising: a knife positioning unit that moves the knife on the bending platen to position the knife with respect to the bending die. It is not necessary to use a mold or the like even when performing multiple bending processes on the knife, and it is possible to perform several bending processes by combining appropriate bending dies, so it is possible to obtain a complicated knife bending shape at extremely low cost. You can

[Brief description of drawings]

1 to 17 show an embodiment of the present invention.
FIG. 1 is a side view of an entire knife bending apparatus according to an embodiment of the present invention, FIG. 2 is a bottom view of a gripping claw of the knife bending apparatus and its driving mechanism as seen from below, and FIG. FIG. 4 is a schematic plan view showing a mounting state of a slide base opening / closing cylinder used in an example, FIG. 4 is a plan view showing the entire bending process portion,
FIG. 5 is a front view of the knife positioning device in the bending process section, FIG. 6 is a side view of the same, FIG. 7 is a side sectional view of a column mounting drum used in the bending process section, and FIG. 8 is a bending column. Fig. 9 is a front sectional view showing the driving device, Fig. 9 is a partial plan view of the driving device, Fig. 10 is a sectional view taken along the line AA in Fig. 9, and Fig. 11 is a partial plan view of the bending column. Fig. 12 is a sectional view of the bending column cut along the guide groove, Fig. 13 is a central sectional view of the bending column, Fig. 14 is a side sectional view of the bending column, and Fig. 15 is a compression spring of the bending column. 16 is a front view of the entire knife bending apparatus, FIG. 18 is a plan view of the knife bending apparatus, and FIG. 18 is a knife formed by the apparatus of the present invention and a holder for inserting the knife. It is a perspective view for explaining an example. 1 ...... shearing process unit Explanation of code], 2 ...... bending process portion 3 ...... knife transport unit, 4 ...... stock unit 4 _a ...... knife stock unit 4 _b ...... crease stock portion 7 ...... material feeder , 8 …… Material supply device 9 …… Shearing device 9 _{a to} 9 _d …… Cutter stand 9 _e …… Bridge cutter stand 10 …… Posture changing device 11 …… Knife positioning device 12 …… Bending process device 13 …… … Gripping device 180 _a , 180 _b …… Gripping claw 182 …… Linear guide rail 181 …… Locking electromagnet 185 …… Standby cylinder 186 …… Piston rod 187 …… Slide table 188 …… Slide base 192 …… Discharge cylinder 196 ...... Compression spring 200 …… Slide plate 202 _a …… Open cylinder 202 _b …… Closed cylinder 206 …… Wire 207 …… Weight 209 _a , 209 _b …… Hinges

Claims (1)

[Claims] 1. A bending apparatus for a sheet processing knife, which bends a sheet processing knife, which is vertically supplied onto a bending surface plate, by sandwiching it with a pair of bending dies. Die retracting means for projecting and retracting from the bending work surface plate, die opening and closing means for opening and closing the bending die protruding from the bending work surface plate, and a knife end by gripping the tip side in the supply direction from the bending part of the knife. The knife gripping means for opening and closing the pair of knife gripping claws for orienting the part in a fixed direction and the knife gripping means for releasing and gripping the knife are engaged with the leading end of the knife in the feeding direction, and the knife is moved on the bending platen. And a knife positioning means for positioning with respect to the bending die, and a bending apparatus for a knife for sheet processing.