JPH11169955A - Band blade bending device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bade bending device capable of correctly and efficiently bending band blade for curved die in a plate face direction. SOLUTION: This band blade bending device 1 is provided with bending working parts 3, 4 having an inner roll 7, which is arranged at the inside in a curvature radial direction of a bending route PL for the bending route PL to bend a band blade while transferring in the longitudinal direction, and an outer roll, which is arranged at the outside in a curvature radial direction of the bending route PL, By rotating the inner roll 7 and the outer roll 8 in the direction reverse to each other while supporting the band blade 2 with a band blade receiving part, the band blade 21 is bent while transferring along the bending route PL. Further the device is provided with a mark imparting device 5, which is arranged at downstream side from the bending working parts 3, 4, receives the band blade 2 after bending and imparts a mark for cotting or bending, etc., in the thickness direction in post working to the band blade 2, and a blanking device 6 by which an embedding notch wider than a bending notch and opening to the same side to the bending notch is blanked in the band blade 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending device for a band blade such as a Thomson blade, and more particularly, to a comb-shaped band blade attached to a curved die such as a rotary die cutter and bent in the direction of its plate surface. The present invention relates to a bending device for bending in a form.

[0002]

2. Description of the Related Art Heretofore, as a punching device for punching out a developed shape of a cardboard box or the like, a punching curved die has been mounted on a rotary cylinder, and the punch mounted on the curved die while rotating the rotary cylinder in the sheet feeding direction. There is known a so-called rotary die cutter that punches out this with a cutting blade. As shown in FIG. 17, in such a curved type E, the punching blade 2p is attached in a substantially straight form at a portion facing the axial direction of the rotary cylinder CL, but is shaped like a curved type at the circumferential direction of the cylinder CL. It must be curved in the plate surface direction according to the peripheral surface shape of E. Therefore, as the band blade 2 serving as the punching blade 2p, a band blade 2 having a plurality of bending notches 2e cut in the width direction from an edge serving as an embedding base end side is used. The band blade 2 applies a bending force in the plate surface direction in a direction in which the opening width of each bending notch 2e becomes narrow, so that the bottom of each bending notch 2e is deformed in the plate surface direction, and bent into a curved shape. can do.

[0003]

However, since the bending operation of the above-mentioned band blade has conventionally been performed manually by using a special processing tool, it is extremely inefficient, and furthermore, the curved peripheral surface is bent. There is a problem that considerable skill is required to accurately obtain a delicate bent shape according to the shape.

An object of the present invention is to provide a band blade bending apparatus capable of accurately and efficiently bending a band-shaped blade for a bending die in a plate surface direction.

[0005]

SUMMARY OF THE INVENTION The present invention provides a comb-shaped band blade in which a plurality of bending notches cut in the width direction from one edge side in the width direction are formed at predetermined intervals in the longitudinal direction. The present invention relates to a band blade bending device for bending a bending notch in a plate surface direction such that an opening side of a bending notch is inside. Specifically, with respect to a bending path for bending the belt while conveying the band blade in the longitudinal direction, an inner roll disposed inside the path in the radius direction of curvature, and similarly disposed outside the path in the direction of curvature radius of the path. At least one of the inner roll and the outer roll includes a plurality of rolls arranged at predetermined intervals along the bending path, and the inner roll and the outer roll along the bending path. The roll is provided with a bent portion that is arranged alternately, and the inner roll is
A band blade receiving portion for receiving an edge side (hereinafter, referred to as an inner edge side) of the band blade where the bending notch is opened, and supporting the band blade in a thickness direction while preventing the band blade from being displaced in its thickness direction. The outer roll receives an edge side (hereinafter, referred to as an outer edge side) opposite to the inner edge side of the band blade, and supports the band blade while preventing displacement in the thickness direction. A band blade receiving portion for forming the band blade is formed along its outer peripheral surface, and the inner roll and the outer roll rotate in opposite directions to each other while supporting the band blade at the band blade receiving portion. Is conveyed along a bending path and is bent.

According to the apparatus configuration of the present invention, a comb-shaped band blade in which a large number of bending notches are formed by a bending portion in which the inner roll and the outer roll are alternately arranged along a bending path. Can be bent with extremely high efficiency. Further, on each outer peripheral surface of the inner roll and the outer roll, a band blade receiving portion for receiving and supporting each corresponding edge of the band blade is formed. Is prevented, so that high processing accuracy can be achieved.

[0007] The band blade receiving portions formed on the inner roll and the outer roll form an annular shape cut in the radial direction of the rolls, receive the respective band sides of the band blade from the openings thereof, and support the band blade on the inner surface thereof. Groove portion. By supporting both edges of the band blade in the annular groove portions of the inner roll and the outer roll, the band blade can be bent and transported more smoothly and stably, and the bending accuracy is also improved.

[0008] As a form of supporting the band edge in the groove, the edge of the band edge can be supported at the bottom of the groove. On the other hand, as a band blade, for example, when using a Thomson blade for punching, in which an acute angled blade portion is formed on the edge opposite to the side where the notch for bending is opened, the groove portion of the outer roll is used. A blade receiving portion formed on the opening side of the groove to receive the blade portion of the band blade, and formed so as to be narrower than the thickness of the band blade, and to follow the blade receiving portion in the groove depth direction. Thus, it is possible to form a cutting edge escape portion for allowing the cutting edge of the cutting portion received by the cutting edge receiving portion to escape. In this case, since the cutting edge does not hit the groove bottom, problems such as chipping can be reduced.

Next, each of the inner roll and the outer roll has a first member forming one inner wall surface of the groove and a second member forming the other inner wall surface in the axial direction of the rolls. By having the structure described, and by providing the first member and the second member in the axial direction so as to be relatively approachable / separable, the width of the groove portion can be changed according to the thickness of the band blade. Things can be used. Thereby, even when the thickness of the band blade changes, the groove width can be changed in accordance with the relative approach or separation between the first member and the second member, and the inner roll and the outer roll can be formed with different groove widths. It is economical because there is no need to change the roll, and the trouble of changing rolls can be omitted.

In this case, a spacer for defining the width of the groove is arranged between the first member and the second member, and the width of the groove is changed by replacing the spacer with one having a different thickness. It can be configured to be changeable. According to this configuration, the groove width can be easily changed by replacing the spacer.

Next, the outer roll and the inner roll are provided so as to be relatively close to and separated from each other, and the roll interval between the outer roll and the inner roll can be changed according to the plate width of the band blade and / or its bent shape. It can be configured as follows. This allows
It becomes possible to flexibly cope with the plate width of various band blades, and fine adjustment of the bending curvature can be easily and accurately performed by changing the roll interval.

Next, the above-mentioned band blade bending apparatus comprises a bending unit comprising a set of one inner roll and two outer rolls arranged one each on the upstream and downstream sides of the inner roll. And a plurality of the bending units are arranged along the bending path, and the conveyed band blade can be bent stepwise by the bending units. In this configuration, instead of performing a strong bending process on the band blade at once, the bending is performed stepwise by a plurality of bending units. Therefore, even when the curvature of the band blade is small, the band blade can be bent. Bending with higher accuracy can be performed without generating cracks, twists, and the like.

In this case, at least one of the plurality of bending units can be moved back and forth in a direction intersecting the bending path to change the bending shape of the band blade, and can be positioned at a plurality of different positions in the moving directions. Can be provided. This makes it possible to easily adjust the bending curvature of the band blade by changing the position of the bending unit.

Specifically, the bending unit comprises a movable body on which the outer roll and the inner roll are rotatably mounted, and a base body which supports the movable body together with the outer roll and the inner roll so as to be integrally slidable in the reciprocating direction. And a stopper portion provided on the base body and abutting against a stopper receiving portion formed on the moving body side, thereby positioning the moving body at a predetermined position in the advance / retreat direction. A stopper position defining member projecting from the stopper mounting portion toward the stopper receiving portion by a predetermined length, the stopper position defining member being detachably mounted to the stopper mounting portion, and the stopper position defining member is attached to the stopper mounting portion. The positioning position in the moving direction of the moving body can be changed by replacing it with one having a different protruding length from the part. It is possible. Thus, the position of the bending unit can be easily changed, and the positioning accuracy is high.

The band blade bending apparatus according to the present invention is arranged downstream of the bending section, receives the band blade after bending, and performs post-processing cutting or bending in the thickness direction. Can be provided on the band blade. Along with bending in the sheet thickness direction, the mark is given to the band blade by the mark applying device, so that the band blade can be efficiently cut and / or bent into a punched shape in the subsequent process. .

The mark applying device can be configured to include, for example, a scribing device for scoring at least one plate surface of the band blade. This is convenient for marking the bending position and the like of the band blade so as to be clear and not easily erased. In this case, the scribing device is a scoring tooth provided corresponding to at least one plate surface of the band blade so as to be able to approach / separate therefrom,
By moving the scribed tooth in a predetermined direction along the plate surface while pressing the scribed tooth against the plate surface,
And a scribing drive unit that forms a scribing unit on the plate surface. Thereby, the ruled portion can be formed more reliably.

On the other hand, the band blade bending device of the present invention is arranged downstream of the bending section, receives the band blade after bending, and has a wider width than the notch for bending. In addition, a punching device for punching an embedding notch that opens on the same side as the bending notch may be provided. With this, the notch for embedding the band blade in a curved shape can be formed together with the bending process on the band blade, so that a more rational and efficient processing of the band blade can be performed.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a band cutting apparatus according to an embodiment of the present invention; FIGS. 1, 2, and 3 are a front view, a plan view, and a side view, respectively, showing an example of a bending apparatus according to the present invention. As shown in FIG. 17, this bending apparatus 1 is used for a punching blade 2p such as a Thomson blade (or a ruled line blade 2q) for a curved die E of a rotary die cutter R for punching out a developed shape of a cardboard box or the like.
In order to attach the band blade 2, the band blade 2 is bent into a shape corresponding to the peripheral surface shape of the curved main body P.

The band blade 2 has a bending notch 2e cut in the width direction from one edge side in the width direction, specifically, an edge side where no blade portion is formed (hereinafter, referred to as a base end side).
The band blade 2 is formed at a predetermined interval along the longitudinal direction, and a portion located between each adjacent bending notch 2e is a convex piece 2b, and the whole has a comb blade shape. On the other hand, the fixed groove 110 is formed in the curved main body P along the bent shape of the band blade 2.
Are formed, and are embedded by press-fitting the base end of the band blade 2 into the fixing groove 110. The fixing groove 110 is formed in a broken line shape appropriately divided at the discontinuous portion 111, while a plurality of fixing grooves 110 are provided at the base end side of the band blade 2 at positions corresponding to the respective discontinuous portions 111 and open to the edge side. Notch 2 for embedding
c is formed wider than the notch 2e for bending. The band blade 2 has the cut-off portion 111 in the embedding notch 2c.
Embedded in the curved main body P while preventing the interference with the band blade 2. The outer peripheral surface of the curved main body P has a substantially cylindrical shape,
The fixing groove 110 is formed in a direction that intersects with the axial direction of the cylindrical surface (for example, formed along the circumferential direction) and is curved in an arc shape or an elliptical arc shape. Then, the band blade 2 is also bent in a shape corresponding to the fixing groove 110 so that the edge on the blade side faces outward in the direction along the plate surface, and then is mounted on the band blade 2.

Prior to being attached to the curved main body P, the band blade 2 is bent by the bending apparatus 1 of the present embodiment as shown in FIG.
As shown in (1), the bending process is performed so that the base end side (the convex piece 2b side) becomes the inner peripheral edge corresponding to the peripheral surface shape of the curved main body P, and the bending is performed in the thickness direction of the band blade 2. A scribing process for forming a scribing portion K serving as a mark for machining;
For example, a punching process or the like for forming an embedding notch 2c to be fitted into the discontinuous portion 111 is performed. These band blades 2
As shown in FIG. 2, the pre-bending device 3, a main bending device 4, a marking device 5 as a marking device, a punching device 6 for forming a notch for embedding, and the like as shown in FIG. Is performed continuously. The band blade 2 is conveyed in the longitudinal direction so that, for example, the plate surface is substantially horizontal, and the devices 3 to 6 are arranged along a pass line (bending path) PL of the band blade 2.

As shown in FIGS. 4 and 5, the pre-bending device 3 is provided with two drive rolls (disposed in a radial direction (bending radial direction) outside the pass line PL along the pass line PL. Outer roll) 7, 7 and pass line PL
, And one driven roll (inner roll) 8 arranged on the opposite side to the drive rolls 7, 7.
A band blade 2 is provided between the driving rolls 7 and the driven roll 8.
Is passed.

As shown in FIG. 7, in the pre-bending device 3, a groove 8n is formed on the roll surface of the driven roll 8 along the circumferential direction, the groove 8n having a radial direction in a depth direction. 2 is in contact with the inner edge. On the other hand, the drive rolls 7, 7 have a slightly smaller diameter than the driven roll 8, and are disposed on both sides of a reference line Q1 drawn in the bending radial direction through the rotation center O1 of the driven roll 8, and
Each of the roll surfaces is formed with a groove 7n having a depth in the radial direction along the circumferential direction, and abuts the outer edge of the band blade 2 in the groove 7n. The band blade 2 is fed in the rotation direction by the rotation of the drive rolls 7 and 7 and the driven roll 8, and the contact point with the driven roll 8 is used as a fulcrum, and the contact point with the drive rolls 7 and 7 is bent. Is applied to a predetermined curvature (for example, 2R) in the plate surface direction in a form close to three-point bending in the plate surface direction.

On the other hand, the main bending device 4 has substantially the same configuration as the preliminary bending device 3 and is disposed so as to extend in the discharge direction of the band blade 2 bent by the preliminary bending device 3. The band blade 2 that is bent and sent by 3 is driven by driving rolls 7 and 7
The belt blade 2 is received between the driven rolls 8 and serves to perform a second-stage bending process so that the bending curvature of the band blade 2 is further reduced (for example, R).

As shown in FIG. 4, in the pre-bending device 3 and the main bending device 4, each drive roll 7 has a rotary shaft 9 inserted into a through hole 7a and a screw member B1 inserted into a protruding portion thereof through a washer W1. It is fixed by screwing, and rotates integrally with the rotating shaft 9 via the key 10. As shown in FIG. 1, the driving roll 7
Universal joint 1 connected to the lower end of rotating shaft 9
6 and a gear unit 17 provided at the lower end thereof, and is rotationally driven by a motor 15 via a transmission mechanism D configured to include the gear unit 17. Each of the rotating shafts 9 is disposed so as to penetrate the cylindrical case 20, and the bearings 21 and 21 provided at the upper and lower ends of the case 20 form a step 9 a and a lock formed on the outer peripheral surface of the case 20. The nut 22 is rotatably supported.

On the other hand, the driven roll 8 is also fixed by inserting the rotary shaft 11 into the through hole 8a, screwing the screw member B2 into the protruding portion thereof through the washer W2, and fixing the driven member 8 through the key 12. It is configured to rotate integrally. The rotating shaft 11 is disposed so as to penetrate a cylindrical case 24, and the bearings 25, 25 provided at the upper end and the lower end of the case 24 form a step 11 a and a lock nut 26 formed on the outer peripheral surface of the case 24. It is rotatably supported. The case 24 is fixed to a base plate 27 as a moving body using a screw member B3.

Next, as shown in FIG. 6 (a), the above-mentioned drive roll 7 has a first member 7b in its rotation axis direction.
(The lower side in the drawing) and the second member 7c (the upper side in the drawing). The outer periphery of the first member 7b is stepped at one end side in the axial direction, and first to third steps 7d, 7e, 7f are formed. The outer peripheral surface of the first step portion 7d forms a part of the roll surface of the driving roll 7, and an annular projecting portion 7h projecting upward along the peripheral edge is formed on the end surface. On the other hand, the second member 7c is formed in a ring shape, and its outer peripheral surface forms a roll surface together with the outer peripheral surface of the first step portion 7d of the first member 7b. Also, the second member 7c has its inner peripheral edge cut out on the side facing the first member 7b, and the first and second steps 7i, 7j.
Are formed. On the end surface of the second member 7c facing the first member 7b, an annular protrusion 7k is formed along a peripheral edge thereof at a position corresponding to the annular protrusion 7h on the first member 7b side.

The second member 7c is integrated by being fitted into the third step portion 7f of the first member 7b in the through hole 71, and a groove 7n is formed in the circumferential direction along the outer peripheral surface 7m of the second member 7c. The cutting edge 2a of the blade 2 is received in the groove 7n. The groove portion 7n is formed such that the annular projecting portion 7h of the first member 7b and the annular projecting portion 7k of the second member 7c face each other at an interval corresponding to the cutting edge 2a. In addition, a space 7o (blade relief portion) is formed between the opposed end surfaces of the first member 7b and the second member 7c.
The opposed surfaces of the annular protrusions 7k and 7h forming the groove 7n are tapered surfaces corresponding to the cutting edge 2a, and come into contact with both surfaces of the cutting edge 2a to receive the bending force. The groove 7n formed by these tapered surfaces forms a space 7o.
And a small gap. Thereby, when the drive roll 7 guides the cutting edge 2a of the band blade 2 in the groove 7n,
The tip of the cutting edge 2a protrudes into the space 7o, so that the cutting edge 2a of the band blade 2 is less likely to be damaged.

On the other hand, as shown in FIGS. 6A and 6C, a radial groove 7p is formed on the end surface of the second member 7c on the opposite side to the first member 7b. ing. The end face of the third step portion 7f of the first member 7b is connected to the second member 7c.
And a radial groove 7q is formed in the through hole. These first and second members 7b and 7c
The groove portions 7p and 7q are radially aligned with each other, and the fixing plate 7r is inserted into the aligned groove portions and fixed with the screw member B5 so that relative movement in the circumferential direction is prevented. A ring-shaped spacer 25 is arranged between the second step 7e of the first member 7b and the second step 7j of the second member 7c. By changing the thickness of the spacer 25, The interval between the grooves 7n can be adjusted. When changing the thickness of the spacer 25, the screw member B
5 and the fixing plate 7r are removed, and the second member 7c is separated from the first member 7b. Then, the spacer 25 is replaced with one having a desired thickness, and the second member 7c and the fixing plate 7r are replaced.
And the screw member B5 may be reassembled.

As shown in FIG. 6 (b), the driven roll 8 also has the first to third steps 8d, 8e, 8f similarly to the drive roll 7.
Member 8b having first and second steps 8i, 8j
And the second member 8c is integrated by being fitted into the third step portion 8f of the first member 8b in the through hole 8l, and in the circumferential direction along the outer peripheral surface 8m. Is formed with a groove 8n,
The b side is received in the groove 8n.
The second member 8c and the first member 8b have grooves 8p, 8p, respectively.
q is formed, and the relative movement in the circumferential direction is prevented by inserting the fixing plate 8r and fixing it with the screw member B5. A ring-shaped spacer 25 is disposed between the second step 8e of the first member 8b and the second step 8j of the second member 8c. Here, the driven roll 8 is not formed with the annular projections 7h and 7k (FIG. 6A) like the drive roll 7, and the first step 8d of the lower member 8b of the driven roll 8 is not formed. The upper surface and the lower surface of the first step portion 8i of the upper portion 8c face each other to form a gap corresponding to the thickness of the band blade 2, and this gap becomes the above-mentioned groove 8n. At the bottom of the groove 8n, the base edge of the band blade 2 abuts and is guided.

Next, as shown in FIGS. 4 and 5, the pre-bending device 3 and the main bending device 4 include a driving roll 7,
7 is provided so as to be able to approach and separate from the driven roll 8. This makes it possible to adjust the roll interval according to the width of the band blade 2 to be bent.
Can be always guided at the optimum position, and the band blade 2 can be fed while being bent smoothly. For the band blades 2 having the same width, fine adjustment of the bending amount is also possible by adjusting the roll interval.

Hereinafter, the specific structure will be described. A case 20 rotatably supporting the rotation shaft 9 of the drive roll 7 is fixed to the front of the slide member 23 near the front using a screw member B. On the lower surface side of the slide member 23, a linear block 28 and a block 29 having a female screw hole 29a are provided. A male screw portion 39a formed on one side of the shaft member 39 is screwed into the female screw hole 29a, and a handle 31 is provided at the other end of the shaft member 39. The shaft member 39 is rotatably supported by a block 32 provided on the base plate 27.

By rotating the handle 31, the linear block 28 slides back and forth along a linear guide 33 provided on the base plate 27. With this sliding movement, the drive rolls 7 move closer to or away from the driven roll 8. Then, by tightening the clamp lever 38 and making the shaft member 39 unrotatable, the drive rolls 7 can be positioned at desired positions. In addition, base plate 2
In order to avoid interference with the rotary shaft 9 or the universal joint 16 that moves together with the drive rolls 7, 7, long holes 27a and 30a are formed in the base 7 and the base 30 at positions corresponding to the movement.

Further, as shown in FIG.
In the bending apparatus 4, a guide member 34 is fixed to the upper surface of the base 30 along both edges in the width direction of the base plate 27. Upper surface of guide member 34 and base plate 27
Of the clamp member 3 so as to straddle them.
5 are arranged. The clamp member 35 is fixed to the guide member 34 by a screw member B7, and the clamp portion 35a of the clamp member 35 clamps the upper side edge of the base plate 27 to fix the base plate 27 to the base 30. The clamp member 35 can reduce the clamping force on the base plate 27 by loosening the screw member B7, and
0 can be slid back and forth along the guide member 34 on the upper surface. Thereby, the pre-bending device 3 and the main bending device 4 can be slid forward and backward, respectively, and the bending radius of the band blade 2 can be changed or adjusted.

Further, as shown in FIG.
In addition, the bending device 4 is provided with a screw member B8 as a stopper receiving portion protruding in the movement direction at the tip of the base plate 27, and the screw member B8 is attached to the stopper position provided on the base 30 side. By contacting the positioning pin 36 as a member, it is positioned at a predetermined bending position. The positioning pin 36 is detachably attached to a positioning block 37 serving as a stopper mounting portion fixed to the upper surface of the base 30. Specifically, the base plate 2 is attached to the positioning block 37.
An insertion hole 37a extending in the direction of movement of 7 is formed, and the positioning pin 36 is inserted here so that the head 36a projects toward the base plate 27 side. Then, by replacing the positioning pin 36 with one having a different length of the head portion 36a, the contact position with the base plate 27 (the screw member B8), that is, the bending position can be changed. In this case, if the positioning pins 36 having various head lengths are prepared in accordance with the bending radius of the band blade 2, the bending radius of the preliminary bending device 3 or the final bending device 4 can be adjusted only by replacing the positioning pins. The corresponding change of the processing position can be performed very easily.

Returning to FIG. 2, the band blade 2 bent by the pre-bending device 3 and the main bending device 4 is sent further downstream, and a scoring process is performed by a scoring device 5 and a punching device 6 performs a scoring process. A punching step for forming a notch for embedding is performed. In addition, the timing of scribing and punching is performed by providing an angle sensor (not shown) such as a rotary encoder on the drive roll 7 or the like of the preliminary bending device 3 or the main bending device 4 and rotating the drive roll 7 detected by the angle sensor. Band blade 2 from quantity
Can be determined by detecting the feed amount.

As shown in FIG. 8A, the ruler 5
Is provided with a first arm 41 and a second arm 42 in a positional relationship sandwiching the protruding portion 40 a of the bracket 40, and the distal ends of the first arm 41 and the second arm 42 are provided on the respective surfaces of the band blade 2. Correspondingly, ruled teeth 43, 43 are provided. As shown in FIG. 8B, a plurality of (three in this embodiment) acute teeth 43a are formed at predetermined ends of each of the ruled teeth 43, 43, for example, at predetermined intervals.

The first and second arms 41 and 42 are rotatably provided on the bracket 40 via shaft members 44 and 44, respectively. A cylinder 45 is loosely mounted on the opposite side of the first arm 41 from the second arm 42 via a spherical washer W3, and a piston rod 46 driven by the cylinder 45 is moved forward and backward by the first arm 41. , And extends through the protrusion 40 a and the second arm 42. Further, compression springs C1, C2 are provided between the first and second arms 41, 42 and the protruding portion 40a, respectively.
It is arranged so as to be extrapolated to. A lock nut 47 is provided at the tip of the piston rod 46, and a spherical washer W4 is arranged between the lock nut 47 and the lower surface of the second arm 42.

As shown in FIG. 9A, when the piston rod 46 is extended by the cylinder 45, the first and second arms 41 and 42 push the shaft members 44 and 44 by the urging force of the compression springs C1 and C2. The opposite side as the center, that is, the side provided with the ruled teeth 43, 43 is opened, and when retracted, the compression springs C1, C2 are closed while being compressed. A piston rod 48 is connected to the back of the bracket 40. Further, a cylinder 49 is provided above a frame 91 provided on the base plate 90. When the piston rod 48 is driven to expand and contract by the cylinder 49, the scribing teeth 43, 43 reciprocate between the scribing position of the band blade 2 and the original position.

The ruler 5 constructed as described above is
As shown in FIG. 9A, the cylinder 49 moves forward to the ruled position while opening the ruled teeth 43, 43. Then, as shown in FIG. 9 (b), when the piston rod 46 is contracted, the marking teeth 43, 43 are closed, and a predetermined marking position of the band blade 2, for example, a state where the vicinity of the cutting edge 2a is bitten. Become. Then, as shown in FIG. 9 (c), by retracting the piston rod 48 in this state, as shown in FIG. 9 (d), the band blade 2 is scribed by the scribe teeth 43, 43. The drawing portion K is formed.
The ruled portion K is used as a mark or the like for bending the band blade 2 in the thickness direction to be performed later. In this embodiment, the tooth portions 43a of the ruled teeth 43, 43 have three teeth. However, as shown in FIGS. 10 and 11, the tooth portions 43a have various shapes such as one or two. be able to.

As shown in FIG. 8, a guide block 92 is provided on the upper surface of the base 30, and a base plate 90 is inserted into the guide hole 92a. This allows the base plate 90 to advance and retreat in the bending radial direction of the band blade 2 along the guide hole 92a. When the position of the base plate 90 is determined, the base plate 90 can be fixed by tightening the clamp lever 93 provided on the upper part of the guide block 92.

A bracket 94 is provided at the lower part of the front surface of the frame 91, and a guide block 95 is provided near the front end of the upper surface. The guide block 95 includes a screw member B provided at the front end of the bracket 94.
Positioned by 12. A long hole 94a is formed in the bracket 94 at a position corresponding to the guide block 95 so as to penetrate the bracket 94 in the thickness direction.
Is screwed into the lower surface of the guide block 95 through the elongated hole 94a. By loosening the screw member B13, the guide block 95 can slide in the bending radius direction of the band blade 2. For example, the ruled portion K is located on the blade side of the band blade 2,
That is, when the guide block 95 is formed on the outer edge in the bending radial direction, the guide block 95 is positioned so as to be in contact with the edge of the band blade 2 on the side opposite to the ruled side, so that the bent direction of the band blade 2 is bent. Can receive the elastic force of
Rule drawing can be performed reliably.

Next, as shown in FIGS. 12 and 13, in the punching device 6, a punching / cutting die 52 having a die hole 52a is attached to the upper surface of the base plate 50 via a frame 51. Also, a punching / cutting die 5
2 above the plate 54 via spring members 53, 53.
Are arranged at predetermined intervals. A punching punch 55 having, for example, a square cross section is attached to the lower surface of the plate 54 so as to project downward.

On the other hand, an elevating frame 56 is provided above the plate 54, and a piston rod 57 is connected to the upper surface of the elevating frame 56. When the piston rod 57 is extended and retracted by the cylinder 58, the elevating frame 56 is driven up and down. A plate 59 is provided inside the elevating frame 56, and a convex portion 60 is formed on the lower surface of the plate 59 so as to protrude downward. The cylinder 58 is supported via a bracket 62 by a frame 61 rising upward from the base plate 50.

As shown in FIG. 14A, the main bending device 4
The band blade 2 sent to the punching device 6 via the scribing device 5 is sent to the upper surface of the punching / cutting die 52.
When the lifting frame 56 is lowered by the cylinder 58, the projection 60 comes into contact with the plate 54 and the spring member 5
3 is compressed while the punch 55 is pushed down. Thus, the punching punch 55 punches the band blade 2 while entering the die hole 52a, and forms an embedding notch 2c at the base end side edge as shown in FIG. 14B. Note that the chip C punched from the band blade 2 falls through the die hole 52a, and as shown in FIGS.
The chip is collected in the chip storage box 63 disposed in the space F between the punching / cutting die 52 and the punching / cutting die 52. Further, after the punching, when the protrusion 60 rises and returns to the original position, the plate 54 is pushed up by the elastic return of the spring member 53.
At this time, the plate 54 is restricted from rising by the stopper 105 fixed at the height position provided on the upper part of the punching / cutting die 52, and can return to the original position.

As shown in FIG. 12, this punching device 6 can also advance and retreat in the bending radius direction of the band blade 2.
Specifically, similarly to the pre-bending device 3 and the main bending device 4, guide members 130 are provided on both sides in the width direction, and the clamp member 131 is provided by the screw member B 14 over the guide member 130 and the upper surface of the base plate 50. Fixed. By loosening the screw member B14, the band cutter 2 of the punching device 6 can be moved in the bending radius direction. Further, as shown in FIG.
A screw member B18 as a stopper receiving portion protruding in the movement direction is provided at the tip of the screw member B18.
Is brought into contact with a positioning pin 132 provided on the base 30 side as a stopper position defining portion, whereby the punching device 6 is positioned at a predetermined punching processing position. This mechanism is the same as that provided in the bending devices 3 to 4 in FIG. 4, and thus detailed description is omitted.

As shown in FIG. 15A, a marking device 70 has a receiving plate 72 for the band blade 2 on a base plate 71, and a marking pen 73 is held by a pen holder 74 above the receiving plate 72. Have been. A piston rod 75 is connected to the rear end of the lower surface of the pen holder 74. By driving the piston rod 75 to expand and contract with a cylinder 76, the marking pen 73 moves up and down to approach and close the band blade 2 on the receiving base 72. Separate. In addition,
The cylinder 76 is attached to a bracket 77 provided on the upper surface of the base plate 71. The base 3
A guide block 78 is provided on the upper surface of the base plate 0, and the base plate 71 is inserted into the guide hole 78a. As a result, the base plate 71 is
Along the direction of the bending radius of the band blade 2. When the position of the base plate 71 is determined, the clamp lever 79 provided on the upper part of the guide block 78 is tightened, so that the base plate 71
Can be fixed. When positioning the base plate 71, the position can be determined by bringing the screw member B15 provided at the front end of the base plate into contact with the positioning pin 80. This mechanism is the same as that provided in the bending devices 3 to 4 in FIG. 4, and thus detailed description is omitted.

In the marking device 70, by lowering the marking pen 73 by the cylinder 76, as shown in FIG. 15B, the ink I is placed at a predetermined position of the band blade 2 sent onto the receiving table 72. Can be attached and marked. By marking the band blade 2 thus bent, a cutting operation by a cutting machine or the like can be performed smoothly while visually observing the marked position in a later step.

Next, as shown in FIG. 2, a band edge detecting device 120 is provided between the ruler 5 and the punching device 6. As shown in FIG. 16B, in the band blade detecting device 120, a bracket 122 is provided on a base plate 121, and on the upper surface of the bracket 122, the band blade 2 is substantially vertically sandwiched in the width direction. The rising shaft members 123 and 124 are fixed. Shaft member 1
A bracket 125 that opens to the band blade 2 side is attached to 23, and a sensor 126 for detecting the band blade 2 is provided on the opening side. In this embodiment, the transmission type optical sensor 126 including the light projecting portion 126a and the light receiving portion 126b attached to the upper and lower portions on the opening side of the bracket 125 is used, however, other types of sensors may be used.

On the other hand, the shaft members 123 and 124 have grooves 127 for guiding both edges of the band blade 2 on the outer peripheral surface.
guide rolls 127 and 128 on which a and 128a are formed
Are rotatably mounted. As a result, as shown in FIG. 16A, the sen 126 detects the leading end 2d in the feed direction of the band blade 2 sent from the preliminary bending device 3 and the main bending device 4. Note that the band blade detecting device 120 also has the positioning pins 140 similarly to the ruler 5 and the like.
, And can be advanced and retracted by the guide block 141 and the clamp lever 142.

In the band blade bending apparatus 1 of the present invention, in addition to cutting the band blade 2 while visually checking the marking as described above, the band blade 2 may be cut at a predetermined position by the punching device 6. It is possible. As shown in FIG. 12, the lifting plate 59 holds the band blade 2 in the lifting frame 56.
Is slidably provided in the feeding direction. Specifically, a piston rod 100 is connected to one end of the elevating frame 56 in the width direction. The piston 101 is driven to expand and contract by a cylinder 101 attached to the elevating frame 56, so that the moving plate 59 is moved to the elevating frame 5.
6 to reciprocate in the width direction thereof. On the other hand, a plate 102 is provided adjacent to the plate 54 in the feeding direction of the band blade 2, and a cutting blade 103 is provided on the lower surface thereof. Then, by operating the cylinder 101, the lifting plate 59 (the convex portion 60) is
From the position of the punching plate 54 to the cutting plate 10
Slide to the position just above 2. And cylinder 5
By pushing down the elevating frame 56 with 8, the convex portion 60 comes into contact with the upper surface of the plate 102 and the cutting blade 103
Press down. Thus, the cutting blade 103 cuts the band blade 2 sent to the upper surface of the punching / cutting die 52 while entering the cutting die hole 52b of the punching / cutting die 52.

Hereinafter, the operation of the band blade bending apparatus 1 will be described. As shown in FIGS. 2 and 7, the band blade 2 is bent to a bending radius 2R while being sent to the driving roll 7 of the preliminary bending device 3, and then is sent to the driving roll 7 of the main bending device 4 while being bent. It is bent. These drive rolls 7
Are rotationally driven by a motor 15 via a transmission mechanism D. The band blade 2 is fed in the feed direction by the driving roll 7, and the leading end 2 d in the feed direction is connected to the band blade detection device 12.
0 is detected by the sensor 126. As a result, the drive roll 7 stops, and the pulse signal detected by the rotary encoder provided on at least one of the drive rolls 7 is cleared. Then, drive roll 7
Starts feeding the band blade 2 and a pulse counter (not shown) starts counting pulse signals. Then, the feed amount of the band blade 2 is calculated from the count value. Thereby, the control unit (not shown) causes the band blade 2 to sequentially perform the scribing process, the punching process, the marking, and the like at a predetermined timing according to a predetermined control program.

The band blade 2 drawn by the ruler 5 is
As shown in FIG. 9D, when bending in the thickness direction,
Processing can be performed using the ruled portion K as a mark.
At this time, for example, three ruled lines X,
Assuming that Y and Z are drawn, the convex piece 2b is bent based on the ruled line Y closest to the center line T in the width direction. For example, as shown in FIG. 17, when a relatively strong bent portion 2r is formed in the band blade 2, if the bent position falls within the bending notch 2e, the folded portion 2r is formed on the inner edge side of the notch 2e.
In some cases, the position r is easily displaced and accurate processing cannot be performed. However, if the bending is performed by selecting the ruled line as described above, the bending position can always be set to an optimum position, and the above-described problem is less likely to occur. In the case where a plurality of bending processes are performed on one band blade 2, a ruled line at the same position (a ruled line Y in this case) is set in a set of ruled lines X to Z formed at each bending position. If selected, the dimensional relationship between the bending positions can be maintained at the desired value.

Here, in the above-mentioned band blade bending device 1,
As shown in FIG. 18, by using the band blade 2 that has been preliminarily bent, the main bending device 4 can be configured to immediately perform the main bending process. In this case, the preliminary bending device 3 can be omitted. Further, as shown in FIG. 19, a straight band blade 2 not pre-bent is used.
In this case, even when the band blade 2 having a relatively small thickness is bent, the pre-bending device 3 can be omitted, and the main bending device 4 can immediately perform the main bending process.

Further, as shown in FIG. 20, the drive roll (outer roll) 7 and the driven roll (inner roll) 8 of the bending device are configured such that the outer roll 7 is three or more and the inner roll is two or more, and these are pass-lined. It may be arranged alternately on both sides of the PL.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a band blade bending apparatus according to the present invention.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a side view of FIG. 1;

FIG. 4 is a front sectional view showing a preliminary bending device for bending a band blade and a main bending device.

5 is a plan view of FIG. 4 and a cross-sectional view showing a main part.

FIG. 6 is a longitudinal sectional view and a plan view of a driving roll and a driven roll.

FIG. 7 is an explanatory view showing the operation of the preliminary bending device and the main bending device.

FIG. 8 is a front sectional view showing a scribing device and an enlarged view showing scoring teeth.

FIG. 9 is an explanatory view showing the operation of the ruler.

FIG. 10 is an explanatory diagram showing a modified example of a ruled tooth.

FIG. 11 is an explanatory view showing another modified example of the ruled tooth.

FIG. 12 is a front view showing a punching device.

FIG. 13 is a side view of FIG. 12;

FIG. 14 is an explanatory view showing the operation of the punching device.

FIG. 15 is a front view showing the marking device and an explanatory diagram showing a state in which a band blade is marked by the marking device.

FIG. 16 is an explanatory view showing a band blade detecting device.

FIG. 17 is an explanatory view showing an attached state of the band blade to the curved main body.

FIG. 18 is a plan view of a band blade bending apparatus in which a pre-bending apparatus is omitted by using a pre-bending pre-bending apparatus, and the main bending apparatus immediately performs a main bending process.

FIG. 19 is a plan view of a band blade bending device in which a preliminary bending device is omitted by using a relatively thin band blade, and the main bending process is immediately performed by the main bending device.

FIG. 20 is a conceptual diagram showing a modified example of the preliminary bending device and the main bending device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 band blade punching device 2 band blade 2 a blade tip 2 b convex piece 2 c notch for embedding 3 preliminary bending device (bending portion) 4 bending device (bending portion) 5 scorer 6 punching device 7 drive roll (outer roll) 7b First member 7c Second member 7n Groove portion 7o Blade tip relief portion 8 Follower roll (inner roll) 8b First member 8c Second member 8n Groove portion 25 Spacer 27 Base plate (moving body) 30 Base 36 Positioning pin (stopper position defining portion) 43 Ruled tooth 49 Cylinder (ruled driving part) 37 Block (stopper mounting part) B8 Screw member (stopper receiving part)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B21D 53/64 B21D 53/64

Claims (13)

[Claims] 1. A comb-shaped band blade, in which a number of bending notches cut in the width direction from one edge side in the width direction are formed at predetermined intervals in a longitudinal direction, the bending notches are arranged in the plate surface direction. A band blade bending apparatus for bending the band blade into a curved form so that the opening side is on the inside, wherein a bending path for bending the band blade while transporting the band blade in the longitudinal direction is inward in a radius of curvature of the path. An inner roll is disposed, and an outer roll is also disposed outside of the path in the radius direction of curvature. At least one of the inner roll and the outer roll is disposed at a predetermined interval along the bending path. Including a plurality of rolls, a bending portion in which the inner roll and the outer roll are alternately arranged along the bending path, wherein the inner roll is an edge side of the band blade where the bending notch is opened. (Hereinafter, the inner edge ), And a band blade receiving portion for supporting the band blade while preventing the band blade from being displaced in the thickness direction is formed along an outer peripheral surface of the band blade. A band blade receiving portion for receiving an edge side (hereinafter, referred to as an outer edge side) of the blade opposite to the inner edge side and for supporting the band blade in a thickness direction while preventing the band blade from being displaced in its thickness direction has an outer peripheral surface thereof. The inner roll and the outer roll rotate in opposite directions while supporting the band blade at the band blade receiving portion, thereby conveying the band blade along the bending path. A band blade bending device characterized in that the bending process is performed while bending. 2. The band blade receiving portions formed on the inner roll and the outer roll form an annular shape cut in the radial direction of the rolls, and receive the respective edge sides of the band blade from the openings to form inner surfaces thereof. 2. The band blade bending device according to claim 1, wherein the groove portion supports the band blade. 3. The band blade has an acute-angled blade formed on an edge opposite to the side on which the bending notch is opened, and the groove of the outer roll has A blade receiving portion formed on the opening side of the groove portion to receive the blade portion of the band blade, so as to be narrower than the thickness of the band blade, and in a shape following the blade receiving portion in the groove depth direction. The band blade bending device according to claim 2, wherein a cutting edge relief portion is formed to release a cutting edge of the blade portion received by the blade receiving portion. 4. The inner roll and the outer roll each include a first member that forms one inner wall surface of the groove and a second member that also forms the other inner wall surface in the axial direction of the rolls. The width of the groove portion is changed according to the thickness of the band blade by providing the first member and the second member in the axial direction so as to be relatively approachable / separable. The band blade bending device according to claim 2 or 3, wherein the band blade bending device is enabled. 5. A spacer for defining the width of the groove is disposed between the first member and the second member, and the spacer is replaced with a spacer having a different thickness, thereby changing the width of the groove. The band blade bending device according to claim 4, wherein the width can be changed. 6. The outer roll and the inner roll are provided so as to be relatively close to and separated from each other, and a roll interval between the outer roll and the inner roll according to a plate width of the band blade and / or a bent shape thereof. The band blade bending apparatus according to any one of claims 1 to 5, wherein 7. A bending unit is constituted by one set of the inner roll and two outer rolls arranged one each on the upstream side and the downstream side of the inner roll, 7. The bending unit according to claim 1, wherein a plurality of bending units are arranged along the bending path, and the band blade to be conveyed is subjected to bending processing stepwise by the bending units.
The band blade bending device according to any one of the above. 8. At least one of the plurality of bending units is capable of moving back and forth in a direction intersecting the bending path for changing the bending shape of the band blade, and at a plurality of positions different from each other in the moving directions. The band blade bending device according to claim 7, which is provided so as to be positionable. 9. The bending unit, comprising: a movable body to which the outer roll and the inner roll are rotatably mounted; and a movable body integrally slidable in the advance / retreat direction together with the outer roll and the inner roll. A base provided on the base, and a stopper for positioning the movable body at a predetermined position in the advance / retreat direction by contacting a stopper receiving part formed on the movable body side; Comprises a stopper mounting portion, and a stopper position defining member which protrudes from the stopper mounting portion by a predetermined length toward the stopper receiving portion and is detachably mounted to the stopper mounting portion. By replacing the position defining member with one having a different protruding length from the stopper mounting portion, the moving body can be moved in the retreating direction. That positioning position changeable and the band blade bending apparatus according to claim 8, wherein. 10. A band blade which is disposed downstream of the bending section and receives the band blade after the bending processing, and marks the band blade for cutting in a post-processing or bending in a sheet thickness direction. The band blade bending device according to any one of claims 1 to 9, further comprising a mark applying device for applying the mark to the band blade. 11. The band blade bending device according to claim 10, wherein the mark applying device includes a ruler for forming a rule on at least one plate surface of the band blade. 12. The scribing device, wherein the scribing tooth is provided corresponding to at least one plate surface of the band blade so as to be able to approach / separate therefrom, and the scribing tooth is pressed against the plate surface. 12. The band blade bending apparatus according to claim 11, further comprising: a scribing driving unit that forms a scribing unit on the plate surface by moving the scribing tooth in a predetermined direction along the plate surface in the state. 13. The bending blade is disposed downstream of the bending portion and receives the bent band blade, and is wider than the bending notch with respect to the band blade and is the same as the bending notch. The band blade bending device according to any one of claims 1 to 12, further comprising a punching device for punching a notch for burying which is open to the side.