JPH07115080B2 - Blade plate bending device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade plate bending apparatus for bending a blade plate into various curvatures in order to make a Thomson blade used for punching a paper tile, making a paper box or the like.

[0002]

2. Description of the Related Art As shown in FIG. 10A, a conventional bending device of this type is such that a slide plate (1) can be moved toward and away from a fixed base (11).
5) are placed opposite each other in a horizontal plane, and the male piece (14) is placed on the fixed base (11).
And a pair of pressing claws (8) (8) are provided on the slide plate (15) so as to be openable and closable. The clamping claws (8) (8) have a common shaft (8
It is pivotally supported by 2), and each has an arm (81) protruding rearward integrally with the claw. When the slide plate (15) advances, slide plate (1
The roller (83) at the tip of the arm (81) is brought into sliding contact with the fixed cam plate (84) arranged above 5), and the pinching claws (8) (8) are closed while the slide plate (15) is moving. Then, insert the blade plate (9) into the male mold piece (14) and bend it.

[0003]

Since the pressing claw (8) has the arm (81) integrally projecting from the pressing claw (8), it has good hardenability and mechanical strength to satisfy the hardness required for the claw. A complicated-shaped nail must be formed by wire cutting from a high-priced and expensive material, which increases the manufacturing cost of the nail.
Also, every time the bending curvature of the blade plate is changed, not only the male mold piece (14) but also the claw itself or the cam plate (84) must be replaced, which also increases the cost and the step. It takes time to replace it.
Furthermore, when the pinching claws (8) (8) pinch the blade plate (9) into the male mold piece (14), the central part of the blade plate (9) tends to escape to the slide plate (15) side, As shown in FIG. 11, the bending intermediate portion (9
There was a problem that 2) did not follow the curved surface of the male mold piece (14) and was slightly pointed. The present invention clarifies a blade bending device that can solve the above problems.

[0004]

According to the present invention, a pair of slide blocks (3) are provided on a slide plate (15) so as to be movable left and right at right angles to the sliding direction of the slide plate and are connected to a slide drive device (200). ) (3) and the base end is a slide block
An arm (5) pivotally connected to (3) and rotatably provided in a plane parallel to the upper surface of the slide plate (15) and a slide plate (15) passing through the center of the male mold piece (14). Parallel to the sliding direction of
(Hereinafter, referred to as center line L), two pivots (16) and (16) standing upright on the slide plate (15) at symmetrical positions, and the pivots (16) and (16) rotatably fitted into the pivots (16) and (16). Clamping claw attached to the tip of the arm
(6) and (6), and the pressing claws (6) and (6) are arms.
It is characterized in that it is mounted so that it can be positioned at an arbitrary position of the tip of the arm (5) in a plane substantially orthogonal to the longitudinal direction of (5) and parallel to the upper surface of the slide plate (15).

Further, in order to make the bending intermediate portion of the blade plate (9) correspond to the curvature of the male mold piece (14), the blade plate (9) is placed on the center line L of the slide plate (15). Presser piece (7) for pressing against (14)
To deploy.

[0006]

[Operation and effect] A male piece (14) having a shaft diameter corresponding to the bending curvature of the blade plate (9) is set on the fixed base (11), and the arm (5) clamping claw
(6) The interval of (6) is adjusted to a size obtained by adding twice the thickness of the blade plate (9) to the shaft diameter of the male mold piece (14). The blade plate (9) is inserted between the male mold piece (14) and the pinching claw (6) in the state where the slide plate (15) is set back in standby (FIG. 8A). With the pressing claws (6) (6) open, the slide plate (15) is moved forward (FIG. 8B). The clamping claws (6), (6) hit the blade plate (9) while moving forward, and the blade plate (9) is pressed by the clamping claws (6), (6) on both sides to move the male mold piece (14). Both sides are bent forward in the center (Fig. 8C). Slide block (3) (3) on slide plate (15) at the forward end of slide plate (15)
To move the pinching claws (6) (6) in the closing direction. As a result, the bent pieces (91) (91) of the blade plate (9) are
The sliding plate (15) is pressed in a direction approaching each other from a direction substantially orthogonal to the sliding direction, and can be bent until the distance between the bending pieces (91) (91) becomes a predetermined distance in consideration of the elastic return margin. .

When changing the bending curvature of the blade plate (9), it is replaced with a male mold piece (14) corresponding to the curvature, and the intervals between the pressing claws (6) and (6) are adjusted. When the pressing piece (7) is provided on the slide plate (15) so as to face the male piece (14), the pressing piece (7) and the male piece (14) are placed at the forward end of the slide plate (15). The gap between the blade plate (9)
Attach the presser piece (7) so that it corresponds to the thickness of. As a result, when the pinching claws (6) (6) bend the blade plate (9) by pressing it against the male mold piece (14), the bent middle part of the blade plate (9) escapes to the slide plate (15) side. Is prevented and the blade plate (9) can be bent properly along the male mold piece (14). The pressing claw (6) and the arm (5) are formed separately, and it is sufficient if only the pressing claw (6) is made of a material having good hardenability, and the entire pressing claw (6) including the arm is included. The manufacturing cost can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a base (1) is provided with a fixed base (11) and a slide plate (15) which can move toward and away from the fixed base (11) in a horizontal plane. In the following description, the front means a fixed base.
The (11) side and the rear are the slide plate (15) side. Figure 2
As shown in, a handle (18) for driving the slide plate is provided at the rear end of the base (1) so as to be rotatable in a vertical plane, and the handle (18) facing upward is manually tilted backward. As a result, the slide plate (15) is moved forward to the fixed base (11) by the toggle mechanism (not shown) provided in the base (1), and when the handle (18) is returned to the original position, the slide plate (15) is returned. (15) retracts and returns to the standby position. A round shaft-shaped male piece (14) is provided at the center of the rear part of the fixed base (11). The male piece (14) is integrally provided with a square pedestal (13), and the pedestal is inserted into the fitting hole (12) formed in the fixed base (11).
(13) is fitted and clamped with a set bolt (not shown). The male mold piece (14) is selectively exchanged according to the bending curvature of the blade plate (9). The male piece (14) is not limited to the round shaft shape, and can be implemented in a desired shape.

As shown in FIG. 8A, on the slide plate (15), the guide shaft (passes through the axis of the male mold piece (14) and on the virtual center line L along the sliding direction of the slide plate (15). 77), claw pivots (16), (16) project perpendicularly to the slide plate (15) at symmetrical positions on both sides of the guide shaft (77). Guide shaft (77)
The pressing piece (7), which will be described later, and the clamping claws (6) on both pivots (16).
(6) is fitted. As shown in Figure 2, slide plate (15)
Mounted so that it can move integrally with the slide plate (15) at the rear part
Deploy (2). The mounting base (2) is formed symmetrically,
A support plate (21) is erected in the middle part in the front-rear direction, and main guide grooves (28) and auxiliary guide grooves (29) are provided on both left and right sides in a horizontal plane orthogonal to the sliding direction of the slide plate (15). It is opened in.

As shown in FIG. 3, support shafts (20) are provided on the left and right sides of the support plate (21) at the center thereof, and arcuate through-slots (24) are formed concentrically with the shafts (20). There is. Support plate (21) for support shaft (20)
A pair of round type positive cams (22), (22) are rotatably attached with the pinch interposed therebetween. Positive cam (22) is a slide block described later.
(3) A cam groove (23) for driving the slide of (3), which is gradually separated from the center in an arc shape on the outer surface of both positive cams (22).
Has been established. Further, pin holes (25) are formed in both positive-moving cams (22) in phase with each other, and the pin holes (25) (25) of both cams and the arcuate through-groove holes (25) of the support plate (21) ( The positive movement cams (22) and (22) are integrally and rotatably connected to each other by a pin (26) which is inserted through the hole (24) in series. The positive drive cam (22) is provided with a handle (27) for rotation drive in a protruding manner, and by removing the pin (26), the two positive drive cams (22), (22) can be separately driven for rotation.

As shown in FIG. 2, slide blocks (3) and (3) are slidably arranged on both left and right sides of the mounting base (2), and rollers (30) provided on the blocks are auxiliary guides for the mounting base (2). It is rollably fitted in the groove (29). Slide block
An auxiliary block (31) is fixed to the (3) with bolts (33), and the auxiliary block (31) is slidably engaged with the main guide groove (28) of the mounting base (2) to move up and down. It is connected to the positive cam (22) via the block (4). The ascending / descending block (4) is a roller (41) which is rotatably fitted in the cam groove (23) of the positive cam (22).
As shown in FIG. 4, a cam groove (42) is obliquely formed on the front side surface of the lifting block (4). A roller (32) is provided on the back surface of the auxiliary block (31), and the roller (32)
Is rotatably fitted in the cam groove (42) of the lifting block (4).

The positive cam (22), the lifting block (4),
The auxiliary block (31) constitutes the slide driving device (200) of the slide block (3). When the handle (27) is tilted to rotate the positive motion cam (22), the lifting block (4) descends. The auxiliary block (31) slides outward along the main guide groove (28) and the auxiliary guide groove (29). Auxiliary block
The slide block (3) connected to (31) is also an auxiliary block.
Moves together with (31). As shown in Figure 2, the mounting base (2)
The end plates (34) are attached to the left and right ends of the base plate by bolts (35), and the outer slide ends of the mounting base (2) can be regulated by the contact bolts (36) screwed to the end plates. A bolt (37) is screwed inward on the slide block (3) in the sliding direction of the block, and the tip of the corresponding bolt (37) is brought into contact with the mounting base (2) at a proper position, so that the slide block The inward slide end of (3) can be regulated.

Bifurcated notch at the front of the slide block (3)
(38) is formed, and the base end of the pressing claw arm (5) is fitted in the notch (38) so as to be rotatable in a horizontal plane. As shown in FIG. 5, the connecting shaft (5) is inserted into the shaft hole (57) opened at the base end of the arm (5).
As shown in FIG. 2, both ends of the shaft (58) are fitted into the elongated holes (39) formed in the slide block (3) with a slight margin in the front-rear direction, as shown in FIG. A dovetail groove (51) is formed in the upper part of the tip surface of the arm (5) in the horizontal direction, and a concave step portion (52) is formed in the outer lower part of the arm tip portion for attaching a claw to the concave step portion (52). The screw holes (53) are opened. A slide piece (54) is provided at the tip of the arm (5), and a protruding piece (55) of the slide piece (54) is slidably fitted in the dovetail groove (51). Slide piece
A shaft hole (56) is opened in the vertical direction in (54).

A clamping claw (6) is connected to the tip of the arm (5). Clamping claw (6) is a claw piece (62) bent inward at the tip.
With a bolt hole (63) and a screw hole (64) at the base end,
A shaft hole (61) is opened in the center in the vertical direction, and the pivot shaft (16) on the slide plate (15) is fitted in the shaft hole. The shaft hole (56) of the slide piece (54) is fitted in the upper part of the pivot (16), and the connecting plate (59) is removably fitted over the upper end protruding portions of both the pivots (16). As shown in FIG. 6, the follow set (67) is screwed into the screw hole (64) on the proximal end side of the pressing claw (6), and the protrusion amount of the tip of the follow set (67) is adjusted to adjust the arm (5). It is possible to adjust the interval between the pressing claws (6) and (6) by hitting it against the concave stepped portion (52) and tightening and fixing the pressing claw (6) with the bolt (65). As shown in Fig. 7, the hole diameter of the bolt hole (63) of the pinching claw (6) is such that the bolt (65) can be inserted in a state inclined with respect to the axis of the bolt hole (63). , There is enough room for the bolt (65). The connecting plate (59) and the connecting shaft (58) at the base end of the arm (5) are removed, and the clamping claw (6) and the slide piece (54) together with the arm (5).
Can be removed from the pivot shaft (16) and the bolt (65) of the pressing claw (6) can be loosened to replace the pressing claw (6).

As shown in FIG. 8, the pressing piece (7) fitted on the guide shaft (77) on the slide plate (15) has a long hole (76) formed in the center in the front-rear direction, and a guide hole is formed in the hole. The shaft (77) is fitted. The tip of the pressing piece (7) is sharp so as not to interfere with the pinching claws (6) and (6), and a shaft hole (78) is formed in the rear end surface.
A convex step portion (17) is formed at a substantially central portion of the slide plate (15), and an adjustment shaft (71) is provided so as to project forward at the center of the front surface of the step portion. The adjustment shaft (71) has a screw shaft (72) on the base end side and a round shaft (7
3), a large-diameter flange part (74) is integrally formed in the middle part, and a plurality of holes (75) with which a rotary tool is engaged are formed on the outer periphery of the flange part. The screw shaft (72) of the adjusting shaft (71) is screwed into the convex step (17),
The tip of the round shaft (73) is fitted in the shaft hole (78) of the pressing piece (7) so as to be rotatable and slidable in the axial direction. Spring (79) on round shaft (73)
Is engaged, and the pressing piece (7) is always urged forward.

However, as shown in FIG. 8A, a male mold piece (14) having a shaft diameter corresponding to the bending curvature of the blade plate (9) is set on the fixed base (11), and the pressing claws (6) (6) are set. Is adjusted to a dimension obtained by adding twice the thickness of the blade plate (9) to the shaft diameter of the male mold piece (14). Also, the slide plate (15) reaches the forward end, and the pressing piece (7) is spring (79).
Male piece (14) and presser piece (7) in the state of maximum retraction against
Rotate the bridge (74) of the adjusting shaft (71) and hence the adjusting shaft (71) so that the distance from the tip of the blade corresponds to the thickness of the blade plate (9)
The amount of protrusion of the adjusting shaft (71) from the front surface is adjusted. With the slide plate (15) in the retracted standby state, press the male piece (14)
The blade plate (9) is inserted between (6) and the slide plate (15) is moved forward. As shown in FIG. 8B, during the forward movement of the slide plate (15), the pressing piece (7) first presses the blade plate (9) against the male mold piece (14).

As shown in FIG. 8C, when the slide plate (15) is further advanced, the pressing claws (6) and (6) bend both sides of the blade plate (9) forward, that is, in a U-shape. If the slide plate (15) retreats as it is, elastically restoring force causes both sides of the blade plate (9) to open, so that the pressing claws (6) and (6) are moved inward relative to each other to move the blade plate ( 9) sandwich it. For this work, slide plate (1
5) Rotate the positive cams (22), (22) by operating the handle (27) to move the slide block (3) to the outside, that is, to move the base end of the arm (5) to the outside. .
When the clamping claws (6) (6) further clamp the U-shaped curved blade plate (9), the bent central portion of the blade plate (9) is clamped by the pressing piece (7) to the male mold piece (14). Since it is pressed against, it is prevented that the center of the bent portion is separated from the male mold piece (14) and becomes sharp as in the conventional case, and the blade plate corresponds to the curvature of the male mold piece (14). (9) can be bent accurately.

Return the handle (27) of the positive cam (22) and the drive handle (18) of the slide plate (15) to their original positions,
(6) The slide plate (15) and (6) are returned to the original standby position. By the above operation, the blade plate (9) is attached to both the bending pieces (91) (9
The interval of 1) can be bent symmetrically into a substantially U shape so that the elastic recovery allowance becomes a predetermined interval. Blade (9)
If you want to change the bending curvature of the
Replace it with 4) and adjust the spacing between the clamping claws (6) (6). Clamping claw
The arm (5) has a slide piece (54) slidably arranged in the horizontal plane at the tip of the pivot (16) fitted in (6).
Since the arm (5) is freely displaced according to the mounting angle of the pressing claw (6), the pressing claw (6) is connected.
The shaft hole (61) of (6) and the shaft hole (56) of the slide piece (54) do not exert a force for hollowing the pivot shaft (16), and the pinching claw (6) can be smoothly rotated. .

When cutting the paper tile of the jigsaw puzzle, cutting blades having different curved shapes on the left and right are required. In the apparatus of the above-mentioned embodiment, the two positive-moving cams (22) and (22) for opening and closing the pressing claws (6) and (6) can be separately rotated by removing the pin (26) connecting both cams. Therefore, at the forward end of the slide plate (15), one clamping claw (6) is stopped and the other clamping claw (6) is stopped.
Move only (6) inward, or use two clamping claws (6) (6)
By moving the insides by different amounts
The blade plate (9) can be bent asymmetrically. The present invention is not limited to the configuration of the above embodiment, and various modifications can be made within the scope of the claims.

[Brief description of drawings]

FIG. 1 is a perspective view of a folding device as seen obliquely from the front.

FIG. 2 is an exploded perspective view of a driving mechanism for a pinching pawl.

FIG. 3 is a perspective view of a positive cam.

FIG. 4 is a perspective view of a lifting block and an auxiliary block.

FIG. 5 is an exploded perspective view of an arm, a slide piece, and a pressing claw.

FIG. 6 is a cross-sectional view showing a mounting state of the pressing claws.

FIG. 7 is a cross-sectional view showing a state in which the mounting angle of the pressing claw is changed.

FIG. 8 is a description of bending the blade plate.

FIG. 9 is a plan view of a blade plate bent by the device of the present invention.

FIG. 10 is an operation explanatory diagram of a conventional device.

FIG. 11 is a plan view of a blade plate bent by a conventional device.

[Explanation of symbols]

 (1) Base (2) Mounting base (5) Arm (6) Clamping claw (7) Presser piece (200) Slide drive device

Claims (2)

[Claims] 1. A fixed base (11) on the base (1) and the fixed base (1)
A slide plate (15) is installed so that it can approach and separate from the (1), and the fixed base (1
A male piece (14) is erected on 1), and a pair of pinching claws (6) and (6) are openably and closably mounted on a slide plate (15).
Slide plate (15) against blade plate (9) inserted between (6)
The blade plate (9) with the pressing claws (6) and (6) by advancing the
In a device which is sandwiched between and bent, a pair of slide blocks (3) are provided on a slide plate (15) so as to be movable left and right at right angles to the sliding direction of the slide plate and are connected to a slide drive device (200). (3) and the base end is a slide block
It passes through the pair of arms (5) (5) pivotally connected to (3) and rotatably arranged in the plane parallel to the upper surface of the slide plate (15) and the center of the male mold piece (14). Two pivots (16) (16) standing on the slide plate (15) in a symmetrical position with respect to a line parallel to the sliding direction of the slide plate (15) (hereinafter, center line L), and the pivots (16) and (16). 16)
The pressing claws (6) and (6), which are rotatably fitted in the (16) and are attached to the end of the arm,
Is substantially orthogonal to the longitudinal direction of the arm (5) and the slide plate (15)
A blade plate bending device mounted so that it can be positioned at any position of the tip of the arm (5) in a plane parallel to the upper surface of the. 2. The blade plate is located on the center line L of the slide plate (15).
The blade plate bending device according to claim 1, wherein a pressing piece (7) capable of pressing the (9) against the male mold piece (14) is provided.