JP2996898B2 - Bending equipment for band-shaped blades - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending apparatus for bending a band-shaped blade three-dimensionally.

[0002]

2. Description of the Related Art A band-shaped blade material for punching or cutting a cardboard or the like into a predetermined shape is formed, for example, in a groove 102 formed on an outer peripheral surface of a cylindrical die board 101 as shown in FIG. It is implanted so that the cutting edge protrudes outward.

In order to implant a band-shaped blade into the cylindrical die board 101 as described above, an arc-shaped band-shaped blade bent in the width direction is bent in the thickness direction so as to match the shape of the groove 102 of the die board 101. There is a need. Conventionally, such bending work has been performed manually by a craftsman.

[0004]

However, when the band-shaped blade is manually bent in the thickness direction as described above, there is a problem that workability is extremely low and some skill is required.

Accordingly, the present invention solves the above-mentioned problems, and a bending apparatus for a band-shaped blade material capable of automatically and highly accurately bending an arc-shaped blade material curved in the width direction in the thickness direction. The purpose is to provide.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, an apparatus for bending a band-shaped blade according to the present invention is arranged so that an arc-shaped band-shaped blade bent in the width direction is formed along the arc of the blade. A blade material feed mechanism for feeding forward, and a thickness direction bending mechanism for bending the blade material in a thickness direction by using a diameter line connecting a center point of an imaginary circle including an arc of the blade material and one point of the arc as a fold The blade material feeding mechanism is configured to have an arc-shaped outer end of the blade material.
A press roller that rolls against the edge and a circle of the blade material
The blade meshes with the comb teeth formed on the inner side of the arc and has the blade.
A drive gear that is rotationally driven to provide feed to the material,
The thickness-direction bending mechanism includes a temporary material including an arc of a blade material.
Substantially coincides with the diameter line connecting the center point of the imaginary circle and one point of the arc.
Front edge and contact both sides in the thickness direction of the blade.
A pair of fixed pieces in contact with each other, at a position slightly in front of the fixed pieces,
Arrange at predetermined intervals in the direction parallel to the thickness direction of the blade material.
And bends the blade material against the side surface of the blade material.
And a pair of movable pieces that can be moved to give
It is what you have .

Also, an arc-shaped band-shaped blade material curved in the width direction.
Blade feed that gives the feed forward along the arc of the blade
A mechanism, a center point of an imaginary circle including the arc of the blade material, and
With the diameter line connecting one point as a fold,
A thickness-direction bending mechanism for applying bending; wherein the blade member feed mechanism is configured to hold the roller in a rollable manner against an arc-shaped outer edge of the blade member, and to roll on an arc-shaped inner edge of the blade member. Possible
Anda rotary driven drive roller so as to provide a feed to the blade material as to contact; the thickness direction bending mechanism,
Connect the center point of an imaginary circle including the arc of the blade to one point of the arc
Having a front edge substantially coinciding with the diameter of the
A pair of fixed pieces abutting on both sides in the
Slightly forward, in the direction parallel to the thickness direction of the blade
It is arranged at a predetermined interval and contacts the side of the blade material.
One that is movable so as to give a bending to the blade material
And a pair of moving pieces.

[0008] An arc-shaped band-shaped blade material curved in the width direction.
To intermittently feed forward along the arc of the blade
The blade material feed casing having the rotating body group is fixed on the base.
The blade material is provided in a fixed manner and in front of the casing.
Arrange fixed pieces that support the side in the thickness direction of
The center point of the virtual circle including the arc of the blade material and one point of the arc
Bend the blade material in the thickness direction with the diameter line connecting
The moving piece to be given is placed on the base in front of the fixed piece.
Provided slidably in a direction parallel to the thickness direction of the blade material,
Further, in front of the moving piece, the outer surface defines the center point of the arc.
The outer surface of the blade material forms a part of the center spherical surface and
A cover member that almost slides on the inner edge of the arc
On the outside of the cover member, set
The escape up space portion to escape, but provided.

[0009]

According to the first aspect of the present invention, the diameter line connecting the center point of the virtual circle including the arc of the band-shaped blade and one point of the circular arc is used as a fold, and the blade is slightly bent in the thickness direction. Thereafter, the blade is slightly fed forward along the arc and slightly bent again in the thickness direction. By repeating such a process a predetermined number of times, the band-shaped blade can be bent at a desired angle and a desired shape in the thickness direction. Further, when one of the pair of movable pieces hits one side in the thickness direction of the blade, the blade bends to the other side in the thickness direction along a line along the front edge of the fixed piece. The fold substantially coincides with a diameter line connecting the center point of the virtual circle including the arc of the blade material and one point of the arc.

[0010] The band-shaped blade is held by the pressing roller and the driving gear from outside in the width direction. In addition, since the drive gear meshes with the comb teeth formed on the arcuate inner edge side of the blade material, the ratio between the rotation angle of the drive gear and the displacement of the blade material feed is eliminated, and the blade material (blade tip) )
Feeding can be precisely controlled.

According to the second aspect of the present invention , the band-shaped blade is held by the pressing roller and the driving roller from outside in the width direction. In addition, if the driving roller is rotated, the blade material can be fed along an arc in proportion to the rotation angle.

According to the third aspect of the present invention, the band-shaped blade is intermittently fed forward along the arc of the blade in a group of rotating members in the blade feeding casing. When the feed of the cutting material is stopped, the moving piece moves in a substantially thickness direction of the cutting material, and the cutting material is located between the fixed piece and the moving piece, and is a virtual circle including the arc of the cutting material. Is bent at a predetermined angle in the thickness direction using a diameter line connecting the center point of the circle and one point of the arc as a fold line. After that, the blade is slightly fed forward and bent at a predetermined angle in the thickness direction.

By repeating the step of sending the blade material forward and bending it a predetermined number of times, the band-shaped blade material can be bent at a desired angle and a desired shape in the thickness direction. Further, the blade member can freely oscillate during bending due to the escape space outside the cover member in front of the moving piece.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments.

FIG. 1 shows an embodiment of an apparatus for bending a band-shaped blade according to the present invention. This apparatus is used to bend a band-shaped blade 1 used in a die for punching a cardboard or the like into a predetermined shape. And a base 2 having a slit portion 2a at a rear portion for inserting an arc-shaped blade member 1 curved in the width direction.
And a blade material feeding casing 3 fixedly provided on the base 2, and a blade material bending slide block slidably disposed in front of the casing 3 so as to be slidable in the left-right direction as indicated by an arrow A. And a slide driver 5 mounted on the base 2 and configured to slide the slide block 4 in the left-right direction.

The base 2 is formed of a plate-like member, and has a cutout 6 at the front end for allowing the blade 1 to escape.

The blade material feeding casing 3 is fixedly provided in front of the slit portion 2a of the base 2. The casing 3 is
A rotating body group 7 for intermittently feeding the blade member 1 forward along the arc of the blade member 1 is provided.

Thus, as shown in FIGS. 1 and 2 (a) and (b) and FIGS. 3 and 4, the bending apparatus is provided on the band-shaped blade 1 along the circular arc of the blade 1. Blade feed mechanism 15 for feeding the blade material 1 and a diameter line D connecting a center point of an imaginary circle C including the arc of the blade material 1 and one point of the circular arc as a fold line.
And a thickness direction bending mechanism 16 for giving a bending in the thickness direction. Here, “the fold line is the diameter line D connecting the center point of the virtual circle C including the arc of the blade member 1 and one point of the arc” means that the fold line is geometrically matched to the diameter line D. The present invention encompasses, without being limited to, a case in which the body is slightly inclined or displaced relatively, because such a case is possible under actual conditions of bending.

The blade member feed mechanism 15 has a rotating body group 7 and a rotation drive motor 17. The rotator group 7 includes two pressing rollers 8, 8 that rollably contact the arc-shaped outer edge of the blade member 1, and a comb tooth portion formed on the arc-shaped inner edge side of the blade member 1.
The drive gear 9 meshes with the support gear 10, and a support roller 11 is provided behind the drive gear 9 so as to rollably contact the arc-shaped inner edge of the blade 1.

An air cylinder is provided on the upper surface of the casing 3.
12 and a cover 41 for the blade material clamping mechanism are provided. A pivot 13 is provided at the lower end of the cylinder rod of the air cylinder 12, and an arm piece 14, on which the pressing rollers 8, 8 are pivotally attached at both front and rear ends, is provided on the pivot 13, around a horizontal axis in the left-right direction. Is pivotally attached to (see (a) in FIG. 2)
(B)). (A mechanism for applying a biasing force such as a spring may be provided instead of the air cylinder 12.)

As shown in the cross-sectional view of FIG. 6, the pressing roller 8 has a circumferential V-shaped groove 26 on the outer peripheral surface. A small concave groove 26a for escaping the cutting edge 1a of the blade material 1 is formed at the bottom of the V-groove 26. Thereby, the blade edge 1a of the blade member 1 can be guided without being damaged.

As shown in FIG. 5, the rotary drive motor 17 is mounted on one side surface of the casing 3 via a height adjusting member 19 so as to be adjustable in height. The height adjustment member 19 is
It has a mounting bracket 19a fixed to one side surface of the casing 3, and a slide bracket 19b to which the motor 17 is fixed and which is mounted on the mounting bracket 19a.

In the vicinity of the four corners of the slide fitting 19b, vertically long holes 39 are formed, and the slide fitting 19b is attached to the mounting fitting 19a via a small screw member 40 inserted through the long holes 39.
It can be slid up and down. Slide bracket 19b
Height adjustment knob screws 24, 24 are pivotally mounted on the upper surface of the. The screws 24 with the knobs are screwed into the horizontal piece at the upper end of the mounting bracket 19a so as to be able to reciprocate vertically.

As shown in FIG. 4, the output shaft 18 of the rotary drive motor 17 is linked to a shaft member 20 attached to the drive gear 9 along the axis.

Further, the drive gear 9 includes a bearing 21.
One end of each of the arm pieces 22, 22 is swingably attached through the arm. A support roller 11 is pivotally attached to the other ends of the arm pieces 22, 22 so as to be freely rotatable.

The arm piece 22 is elastically urged by an elastic member 23 provided in the casing 3 so that the support roller 11 always comes into contact with the arc-shaped inner edge of the blade member 1 (FIG. 2). (A) and (b)). A gear portion 11a is formed on the outer peripheral surface of the support roller 11 so as to mesh with the comb tooth portion 10 of the arc-shaped inner edge of the blade member 1 (see FIG. 4).

The height positions of the rotary drive motor 17, the drive gear 9, and the support roller 11 can be adjusted by screwing the knob screws 24, 24 back and forth. For this reason, the drive gear 9 and the support roller 11 can be reliably brought into contact with the arc-shaped inner edge of the blade 1 in accordance with the change in the curvature of the blade 1 in the width direction.

Further, since the drive gear 9 meshes with the comb teeth portion 10 formed on the arcuate inner edge of the blade member 1, the blade member 1 can be fed with high precision. In other words, the feed dimension of the cutting edge is
Since it corresponds to the number of teeth of the comb teeth of the comb tooth portion 10, by precisely controlling the number of teeth to be fed, the feed dimension of the cutting edge becomes accurate.

As shown in FIGS. 2A and 2B and FIGS. 5A and 5B and FIGS. 7A and 7B, the thickness direction bending mechanism 16 A pair of fixed pieces 27, 27 having front edges 25 that substantially coincide with each other and abutting on both side faces in the thickness direction of the blade 1, and the thickness direction of the blade 1 at a position slightly forward of the fixed pieces 27, 27. It has a pair of movable pieces 28, 28 which are arranged in a parallel direction at a predetermined interval S, and which are movable on the side surface of the blade member 1 so as to bend the blade member 1.

That is, in front of the casing 3, fixed pieces 27, 27 for supporting the side surface of the blade member 1 in the thickness direction are provided. The movable pieces 28, 28 are slidably provided on the base 2 in front of the fixed pieces 27, 27 in a direction parallel to the thickness direction of the blade member 1.

More specifically, as shown in FIG. 1, a left-right rail member 29 is fixed to the lower front surface 3a of the casing 3. Further, the slide block 4 having the movable pieces 28, 28 on the upper part is attached to the rail member 29 so as to be slidable in the left-right direction (indicated by an arrow A).

Further, one end of the slide block 4 is connected to a crank arm provided on a slide drive 5 on the base 2.
It is connected to the tip of 31. The slide driver 5 includes a drive motor, a reduction mechanism, a cam, and a crank arm 31 (not shown).
The crank arm 31 is configured to move substantially in the left-right direction by the rotational driving of the motor.

The base 2 in front of the slide block 4
The sensor mounting bracket 32 is fixed thereon. The mounting bracket
Sensors 33a, 33b, 33c for detecting the positions of the moving pieces 28, 28 in the left-right direction are attached to the rear surface of the 32.

Further, on the front surface of the slide block 4, a detected member 34 detected by sensors 33a, 33b, 33c.
Is fixed.

On the front surface of the slide block 4 and on the rear surface of the sensor mounting bracket 32, a scale 43 (magnescale) for converting a moving dimension of the slide block 4 into an electric signal.
Is provided. The scale 43 includes a slider 44 fixed to the front surface of the slide block 4 and the sensor mounting bracket 32.
And a scale body 45 fixed to the rear surface of the scale.

The scale 43 and the sensors 33a, 33b, 33
c is electrically connected to control means (control circuit) not shown.

Thus, the scale 43 and the sensors 33a, 33
b and 33c are fed back to the control means, and the motor 17 of the blade material feed mechanism 15 and the thickness direction bending mechanism 16
The rotation of the motor is controlled precisely.

In front of the moving pieces 28, 28, the outer surface 36 forms a part of a spherical surface centered on the center point of the arc of the blade 1, and the outer surface 36 is formed on the inner edge of the arc of the blade 1. A cover member 35 that is substantially in sliding contact is provided, and an escape space portion R that escapes lateral vibration during bending of the blade member 1 is provided outside the cover member 35.

In the illustrated example, the radius of curvature of the outer surface 36 of the cover member 35 is set to be slightly smaller than the radius of the arc-shaped inner edge of the band-shaped blade 1 having a small arc radius (see FIG. 2). (B)).

With the above-described configuration, the bending apparatus can cope with a plurality of types of band-shaped blade members 1 having different arc radii. That is, as shown in FIG.
In both the case where the radius of the arc is small and the case where the radius of the blade 1 is large as shown in FIG. 2 (b), the pressing rollers 8, 8 are securely attached to the arc-shaped outer edge of the blade 1. And the drive gear 9 and the support roller 11 can be reliably brought into contact with the arc-shaped inner edge.

In order to bend the blade member 1 with this bending apparatus, the blade member 1 which is formed in an arc shape which is curved in the width direction in advance is set in the present apparatus. Then, for example, as shown in FIG. 7A, the blade 1 is inserted between a pair of fixed pieces 27, 27 and the movable pieces 28, 28, and the blade 1 is sent forward. That is, the drive gear 9 of the blade material feed mechanism 15 is
Rotate to feed blade material 1 ((a) (b) in FIG. 2)
reference).

Thereafter, as shown in FIG. 7 (b), when the predetermined position of the blade member 1 reaches an intermediate position between the front edges 25, 25 of the fixed pieces 27, 27, the feeding of the blade member 1 is stopped. And moving the movable pieces 28, 28 so that one fixed piece
Strongly, and bends the blade material 1 at a predetermined position at a predetermined angle.

Next, as shown in FIG.
28, 28 are retracted to the original position, and the blade member 1 is sent forward again (see FIG. 2).

Thereafter, as shown in FIG. 7D, a predetermined portion of the blade member 1 slightly behind the above-mentioned predetermined portion H reaches an intermediate position between the front edges 25, 25 of the fixed pieces 27, 27. Then, the feed of the blade 1 is stopped, and the moving pieces 28, 28 are moved. One fixed piece moving piece 28 is strongly pressed against one side of the blade 1, and the blade 1 is repositioned at a predetermined position. Is bent by a predetermined angle.

The above operation is repeated, and while the blade member 1 is intermittently fed, each time the feeding of the blade member 1 is stopped, the moving piece
If the bending work is performed by moving 28, 28, the blade material 1 is bent at a plurality of locations at predetermined minute intervals, and the whole can be bent into a curved shape. By changing the predetermined minute interval, the number of times of bending, the bending direction, and the like, the blade member 1 can be bent into a desired shape.

The above-mentioned operation is automatically performed by a control means such as a computer (not shown) to which data such as a place where the blade material is bent, a bending angle, and a bending direction are input.

Thus, the blade material 1 bent as described above is implanted in grooves 102 formed on the outer peripheral surface of a cylindrical die board 101 as shown in FIG. That is, according to the present apparatus, the blade 1 can be automatically bent into a predetermined shape so that the blade 1 can be fitted into the grooves 102 of the die board 101 without any dimensional error.

It is also preferable that a bending device for bending a straight band-shaped blade in the width direction is disposed immediately before the present device.
By doing so, the bending in the width direction and the bending in the thickness direction of the blade material can be continuously performed.

Next, FIG. 9 shows a main part of another embodiment.
A press roller 8, 8 in which a blade member feed mechanism 15 rollably abuts an arc-shaped outer edge of the blade member 1, and a roll member abuts on an arc-shaped inner edge of the blade member 1 while being rotatable. 1 includes a drive roller 37 that is driven to rotate so as to feed the feed roller 1, and a support roller 11 that is rotatably abutted on the arc-shaped inner edge of the blade member 1 behind the drive roller 37.

The driving roller 37 is formed of an elastic member such as urethane or rubber, and its outer peripheral surface is in pressure contact with the inner edge of the blade material 1 in an arc shape. The drive roller 37 is linked to an output shaft of a motor (not shown). This blade material feed mechanism 15
Does not have the drive gear 9 shown in FIGS.
Other configurations are the same as those shown in FIGS.

With the above configuration, the driving roller 37 can be easily manufactured, and the manufacturing cost can be reduced.

Next, FIG. 10 shows a main part of another embodiment.
The blade member feed mechanism 15 has a pair of pinching rollers 38, 38 which rollably abut on both side surfaces in the thickness direction of the blade member 1, and one of the pinching rollers 38, 38 1 is driven to rotate.

That is, one of the holding rollers 38 is operatively connected to the output shaft of a motor (not shown), and the other holding roller 38 is rotatable in the direction in which the blade 1 is fed. The holding rollers 38 are formed of an elastic member such as urethane or rubber, and the outer peripheral surface thereof comes into pressure contact with both side surfaces in the thickness direction of the blade member 1 to obtain a frictional force for feeding the blade member 1. It is preferable that a part of the holding rollers 38, 38 of the blade member feed mechanism 15 be rotated while slightly engaging the comb teeth portions 10 (shown in FIGS. 2 and 9).

With the above structure, the structure of the blade member feed mechanism 15 is simplified, and the blade member feed mechanism 15 can be easily manufactured. Therefore, the manufacturing cost of the entire apparatus can be reduced. It is to be noted that not only one pair but also a plurality of pairs of the holding rollers 38 may be provided. Further, both of the holding rollers 38, 38 may be driven to rotate by a motor.

In the present invention, the relation between the "diameter line D connecting the center point of the virtual circle C and one point of the arc" and the "fold line" need not be limited to the case where they completely match geometrically. There are, however, other cases where there is slight inclination or misalignment,
Include.

The present invention can be modified in design in addition to the above-described embodiment. For example, one of the pressing rollers 8, 8 shown in FIGS. The gear 9 can be freely rotated to feed the blade material 1. By doing so, the feed dimension can be controlled with high accuracy based on the cutting edge of the blade member 1. (The feed amount can be read directly by the blade.) Alternatively, the other of the pressing rollers 8, 8 may be driven.

Further, the blade member feed mechanism 15 is connected to one pressing roller 8 contacting the arc-shaped outer edge of the blade member 1 and one drive gear 9 or driving roller 37 contacting the arc-shaped inner edge. It is also free to form.

The thickness direction bending mechanism 16 may be other than the above-described embodiment.
27, 27, it is also preferable to be configured to swing about a vertical axis center behind and move substantially in the left-right direction. Further, the moving pieces 28, 28 are fixed to the casing 3 having the blade material feed mechanism 15, and the fixed pieces 27, 27 are disposed in front of the moving pieces 28, 28, so that the casing 3 and the moving pieces 28, 28 It is free to be configured to swing or move integrally.

[0059]

The present invention has the following remarkable effects by the above-mentioned structure.

According to the apparatus for bending a band-shaped blade material according to the first aspect, the arc-shaped band-shaped blade material 1 is automatically and accurately bent in the thickness direction to easily obtain a three-dimensionally bent blade material. be able to. Thereby, the blade 1 after the three-dimensional bending by the present apparatus is inserted into the groove formed in the cylindrical die board.
The shape can be easily fitted to anyone. In addition, the structure of the thickness direction bending mechanism 16 can be simplified, and it can be bent into a more accurate shape.

Further , the band-shaped blade 1 can be bent into a more accurate three-dimensional shape.

[0062] According to the bending apparatus of the belt-like blade member according to claim 2, with the same effects as those of claim 1, wherein, that the structure of the blade material feeding mechanism 15 is simplified, easily manufactured it can.

According to the apparatus for bending a band-shaped blade material according to the third aspect , the arc-shaped band-shaped blade material 1 can be automatically and accurately bent in the thickness direction. Thereby, the blade material 1 after bending by the present apparatus can be formed into a shape that can be easily fitted by anyone into the groove formed in the cylindrical die board.

Further, at the time of bending, the blade member 1 sent forward from the movable pieces 28, 28 can freely swing right and left without hitting another object. Therefore, the blade material 1 after bending is not deformed, and the finished shape becomes more accurate.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of the present invention.

FIG. 2 is an explanatory diagram of an operation of a main part.

FIG. 3 is an enlarged sectional plan view of a main part.

FIG. 4 is an enlarged sectional plan view of a main part.

FIG. 5 is a perspective view of a main part.

FIG. 6 is an enlarged sectional view of a main part.

FIG. 7 is an operation explanatory view of a main part.

FIG. 8 is a perspective view of a die board.

FIG. 9 is a simplified explanatory view of a main part of another embodiment.

FIG. 10 is a simplified explanatory diagram of a main part of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blade material 2 Base 3 Blade material feeding casing 7 Rotating body group 8 Holding roller 9 Drive gear 10 Comb part 15 Blade material feeding mechanism 16 Thickness bending mechanism 25 Front edge 27 Fixed piece 28 Moving piece 35 Cover member 36 Outer surface 37 Driving roller 38 Nipping roller C Virtual circle D Diameter line R Escape space S Predetermined interval

Claims (3)

(57) [Claims] 1. A blade member feed mechanism 15 for feeding an arc-shaped band-shaped blade member 1 curved in the width direction forward along an arc of the blade member 1, and a virtual circle C including an arc of the blade member 1. And a thickness direction bending mechanism 16 for bending the blade member 1 in the thickness direction by using a diameter line D connecting the center point of the circular arc and one point of the arc as a fold . Rolls on the outer edge of the arc
Roller 8 in contact with the inner surface of the blade 1
The blade material 1 meshes with the comb teeth 10 formed on the edge side.
A driving gear 9 that is driven to rotate so as to feed the
Have, the thickness direction bending mechanism 16, the blade material 1 which has a leading edge 25 which substantially coincides with the diameter line D connecting the single point of center point and the arc of an imaginary circle C that includes an arc of the blade material 1 A pair of fixed pieces 27, 27 abutting on both side surfaces in the thickness direction are provided at a predetermined distance S in a direction parallel to the thickness direction of the blade member 1 at a position slightly forward of the fixed pieces 27, 27. And a pair of movable pieces (28, 28) that can move so as to apply a bend to the blade member (1) by hitting the side surface of the blade member (1). 2. An arcuate band-shaped blade 1 curved in the width direction.
Blade feed that gives feed forward along the arc of the blade 1
A mechanism 15, a center point of an imaginary circle C including an arc of the blade member 1, and
A diameter line D connecting one point of the arc is a fold line for the blade material 1.
A thickness direction bending mechanism 16 for bending in the thickness direction is provided.
For example, the with the blade member feeding mechanism 15, the pressing roller 8 rollably abuts on the arc-shaped outer edge of the blade member 1, rollably abuts on an arc-shaped inner edge of the blade material 1 And a drive roller 37 that is driven to rotate so as to feed the blade 1, wherein the thickness direction bending mechanism 16 is a virtual circle including an arc of the blade 1.
It substantially coincides with the diameter line D connecting the center point of C and one point of the arc.
Side edges in the thickness direction of the blade 1
And a pair of fixed pieces 27, 27 contacting the
Crab forward position, in a direction parallel to the thickness direction of the blade 1
A side surface of the blade member 1 which is disposed at a predetermined interval S
Can be moved to give a bend to the blade material 1 during
And a pair of movable pieces 28, 28
Bending apparatus of the belt-shaped blade member to. 3. An arc-shaped band-shaped blade 1 curved in the width direction.
Intermittently feed forward along the arc of the blade 1
The blade member feeding casings 3 having a rotating body group 7, base 2
In addition to being fixedly provided on the upper side, in front of the casing 3,
Fixing pieces 27, 27 supporting the side surfaces in the thickness direction of the blade material 1
In the virtual circle C including the arc of the blade material 1
The diameter line D connecting the center point and one point of the arc is a fold line
The moving pieces 28, 28 for bending the blade 1 in the thickness direction are
On the base 2 in front of the fixed pieces 27, 27,
Slidably provided in a direction parallel to the
In front of the moving pieces 28, 28, the outer surface 36 is located at the center of the arc.
The outer surface 36 forms a part of a spherical surface as a center, and
Arrange the cover member 35 substantially slidably in contact with the inner edge of the arc,
At the time of bending the blade material 1 outside the cover member 35,
An escape space R for escaping sideways is provided.
Bending apparatus of the belt-shaped blade member to.