KR20030025677A - apparatus for folding arc-shaped band blade - Google Patents

Abstract

PURPOSE: An apparatus for bending arc shaped band blade is provided to maximize productivity by continuously transferring and bending the band blade as constantly maintaining radius of curvature of the arc shaped band blade. CONSTITUTION: In an apparatus for bending arc shaped band blade comprising a transfer unit(100) for transferring an arc shaped band blade that is curved widthwise to have a certain radius of curvature along arc of the blade, and a bending unit for bending the band blade, the apparatus for bending arc shaped band blade is characterized in that the transfer unit comprises first and second holding means(130a,130b) for holding the band blade; a rotation means(150) for rotating the first and second holding means along the arc of the band blade; and a control means for controlling the first and second holding means so that the other holding means is released from the holding state while any one holding means of the first and second holding means is being rotated by holding the band blade, wherein the rotation means(150) comprises an inner rack(151a) on the outer surface of which a tooth form is formed; an outer rack(151b) on the inner surface of which a tooth form is formed; a pinion gear(153) engaged with the inner and outer racks between the inner and outer racks; and a motor(155) for rotating the pinion gear forwardly and reversely, and the inner and outer racks(151a,151b) have the same center as the center of radius of curvature of the band blade.

Description

Apparatus for folding arc-shaped band blade

The present invention relates to an arc-shaped band blade bending device, and more particularly, to a band blade bending device for continuously conveying and bending a band blade by a gripping means held by a rack, pinion and a seesaw method.

Conventional arc-shaped band blades are carried out only by feeding and cutting, and bending is performed by hand. This means that when the feed bending is performed by the usual roll feed method, the feed force of the roll must act on the band blade to be bent. However, since this feed force is almost dependent on the friction force between the roll and the band blade, the bending band blade is at rest and the feed force is continuously applied to the stationary band blade so that the band blade maintains a predetermined radius of curvature. You won't be able to. Thus, the band blades that deviate from the predetermined radius of curvature do not coincide with the bends of the bent portion of the bending unit and the band blades, and thus the transfer is hindered and the bending cannot be performed.

As a bending apparatus which makes it possible to match the bending line of such a band blade and the bending part of a bending unit, what was disclosed by Unexamined-Japanese-Patent No. 8-332524 and 9-99320 is proposed, for example.

In the bending device of Japanese Patent Application Laid-Open No. Hei 8-332524, a pressure roller is disposed at an outer diameter side end of an arc-shaped band blade, and a support roller and a drive gear are disposed at an inner diameter side end to transfer the band blade to the bending device by rotation of the drive gear.

However, in the bending device, since the band-shaped circular arc blade is transported in engagement with the drive gear when a plurality of slits 2 are formed at the inner diameter side end as shown in FIG. It may be difficult to reliably maintain the radius of curvature of the band blade because it is conveyed in almost the same manner as the feed method.

In the bending device of Japanese Patent Laid-Open No. Hei 9-99320, bending is carried out while transferring the rear end portion of an arc-shaped band blade. Therefore, since the band blade is conveyed by the gripping force, bending can be performed smoothly while the radius of curvature of the band blade is kept constant.

However, in this bending apparatus, since the rear end of the band blade has to be gripped, a band blade cut to a predetermined length in advance is required for the position to be gripped. Therefore, in order to manufacture a band blade having several three-dimensional curves, it is necessary to grip the cut band blades one by one, which makes continuous feeding impossible.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a band blade bending device for maximizing productivity by continuously conveying bending while maintaining a constant radius of curvature of the arc-shaped band blade. .

1 is a front view schematically showing an arc-shaped band blade bending device according to a preferred embodiment of the present invention,

Figure 2 is a perspective view showing in detail the transfer unit in Figure 1,

3 is a cross-sectional view showing the main configuration of the transfer unit,

Figure 4 is a perspective view showing in detail the bending unit in Figure 1,

5 is a view for explaining a band blade on an arc.

*** Explanation of symbols for the main parts of the drawing ***

A: Band blade 1: blade tip

2: Slit 10: Base

30: column 100: transfer unit

110a: first arm 110b: second arm

130a: first holding means 130b: second holding means

131a, 131b: movable gripping block 133a, 133b: cylinder

135a, 135b: fixed holding block 137a: pressure roller

139a, 139b: connecting block 140a, 140b: guide roller

141a, 141b: support block 143a, 143b: fixed block

150: swing means 151a: inner rack

151b: outer rack 153: pinion gear

155 motor 157 support roller

170: guide rail 200: mounting block

300: bending unit 310: guide

320: bending portion 330: bending rotating body

350: bending member 370: first driving means

371: Motor 373: Gear

390: second driving means 500: cutting unit

700: encoder

Band blade bending device according to the present invention for achieving the above object is bent to bend the band blade and the transfer unit for transferring the band blades of the circular arc having a predetermined curvature radius along the arc of the blade is curved in the width direction It comprises a unit, wherein the transfer unit comprises a first holding means and a second holding means for holding the band blade; Pivot means for pivoting the first gripping means and the second gripping means along an arc of the band blade; While the holding means of any one of the first holding means and the second holding means is turned by holding the band blade, the other holding means comprises control means for controlling to release the holding state.

This configuration enables continuous feeding of the band blades on the circular arc to be fed.

In the above-described configuration, the turning means includes an inner rack formed with teeth on the outer surface; An outer rack having teeth formed on an inner side thereof; Pinion gears engaged with each other between the inner rack and the outer rack; It is preferable that the pinion gear has a motor for forward / reverse rotation, and wherein the inner rack and the outer rack are formed to have the same center as the center of the radius of curvature of the band blade. In addition, support rollers are disposed on the inner surface of the inner rack and the outer surface of the outer rack, so that the racks can be stably arced.

The gripping means each one side of the arm is fixed to the inner rack; Movable gripping block; Preferably, the movable gripping block comprises a first driving cylinder for advancing or retracting the respective arms.

And, the holding means is a fixed gripping block each one side is disposed on the arm fixed to the inner rack; Movable gripping block; Preferably, the movable gripping block comprises a first driving cylinder for advancing or retracting the fixed gripping block.

In addition, since the guide rails for guiding the other side of each of the arms are arranged to have the same center as the center of the radius of curvature of the band blade, it is possible to precisely maintain the circular motion of the band blade.

In addition, the guide roller for guiding the outer diameter side end of the band blade is disposed, it is preferable to be pivoted integrally with the respective holding means.

Moreover, it is preferable that the pressing roller for pressing in the thickness direction of the band blade is arranged.

Hereinafter, a band blade bending apparatus according to a preferred embodiment of the present invention with reference to the accompanying drawings will be described in detail.

1 is a front view schematically showing an arc-shaped band blade bending device according to a preferred embodiment of the present invention, Figure 2 is a perspective view showing in detail the transfer unit in Figure 1, Figure 3 shows the main configuration in the transfer unit 4 is a perspective view illustrating the bending unit in detail in FIG. 1, and FIG. 5 is a view for explaining an arc-shaped band blade.

5 shows an example of an arc-shaped band blade A bent in the bending apparatus according to the present invention, which is curved in the width direction to have a predetermined radius of curvature R, so that the blade 1 is formed on the outer diameter side and the inner diameter side. A plurality of slits 2 are formed. This slit 2 is usually formed to easily bend the straight band blade. This band blade A is not cut | disconnected to predetermined length in this Example, but the drum (not shown) by which the width direction surface of the band blade A was laminated | stacked is wound. Therefore, the band blade A can be continuously conveyed.

In addition, the double-dot chain line B is a bending line passing through the center O of the radius of curvature R of the band blade A. FIG.

As shown in Figure 1, the band blade bending device according to a preferred embodiment of the present invention is largely the transfer unit 100 and the band blade (A) for transferring the band blade (A) along the arc of the blade (A) The bending unit 300 is bent in the thickness direction of the.

The transfer unit 100 includes a first gripping means 130a and a second gripping means 130b for gripping the band blade A; Turning means 150 for turning the first holding means 130a and the second holding means 130b in opposite directions with respect to the central axis O of the radius of curvature R of the band blade A; Control means (not shown) for controlling the other gripping means to release the gripping state while the gripping means of any one of the first gripping means 130a and the second gripping means 130b grips the band blade A. It consists of.

In the above configuration, each holding means (130a; 130b) is the arm (110a; 110b), the movable gripping block (131a; 131b), the movable holding block (131a; 131b) with respect to the upper surface of each arm (110a; 110b) ) Is configured to drive cylinders 133a and 133b to move forward or backward.

Each of the arms 110a and 110b is formed of a rectangular block, and each of the arms 110a and 110b is preferably disposed to face the center of curvature O as shown in FIG. shape). This is to enable the reciprocating turning movement in the opposite direction by the turning means 150 smoothly.

The movable gripping blocks 131a and 131b are fixed to the tip of a piston rod (not shown) of the drive cylinders 133a and 133b. In the band blade A placed on the upper surface of the arms 110a and 110b, the first movable gripping block 131a and the second movable gripping block 131b are gripped in succession with each other according to the seesaw method. That is, while the first movable gripping block 131a and the second movable gripping block 131b are turning in a direction away from each other (arrow F), the first movable gripping block 131a is held and the second movable gripping block ( 131b) is in a state in which the gripping is released, and the gripping is performed while turning in the direction of approaching each other (arrow F '). Therefore, the band blade A can be continuously conveyed toward the bending unit 300, thereby maximizing productivity. The replacement of these grips is made by the control means described above. On the other hand, when the above-described gripping state is configured by turning in reverse, the bent and remaining band blades A can be transferred from the bending unit 300 toward the winding drum (not shown).

The driving cylinders 133a and 133b are fixed to the arms 110a and 110b by the connecting blocks 139a and 139b, and the action force is made by pneumatic pressure (usually, a pneumatic line is formed inside the factory).

Meanwhile, although the band blade A may be gripped by the upper surfaces of the arms 110a and 110b and the movable gripping blocks 131a and 131b, in order to install the guide rollers 140a and 140b described below, the respective arms 110a are provided. It is preferable that fixed gripping blocks 135a and 135b are installed on the upper surface of the 110b (ie, the vicinity of the band blades are gripped). That is, when the fixed gripping blocks 135a and 135b are installed, the band blades A are placed on the fixed gripping blocks 135a and 135b to be positioned at a predetermined height from the upper surface. Therefore, the guide rollers (140a; 140b) is rotatable while receiving the outer diameter side end of the band blade (A).

The role of this guide roller (140a; 140b) is as follows. That is, the band blade A is transferred to the bent portion 320 by the turning means 150 while being held by the gripping force of the first gripping means 130a or the gripping force of the second gripping means 130b. At this time, the guide rollers (140a; 140b) is guided to receive the outer diameter side edge 1 of the band blade (A). That is, each of the guide rollers 140a and 140b is configured as a pair as shown in FIG. 3 and has a structure in which the cutting line 1 is accommodated in the groove formed therebetween. Accordingly, the guide rollers 140a and 140b restrain the band blade A from deforming elastically due to external factors. As a result, the guide rollers (140a; 140b) can more accurately pass the predetermined radius of curvature of the band blade (A) can further improve the bending precision.

In particular, the guide rollers (140a; 140b) is preferably positioned on the gripping means (130a; 130b) and the radius of curvature (R). To this end, the guide rollers (140a; 140b) is fixed to the support block (141a; 141b), the support block (141a; 141b) is fixed to the fixed block (143a; 143b) fixed to the upper surface of the arm (110a; 110b) do. Therefore, since the guide rollers 140a and 140b are pivoted together while guiding the cutting edges 1 of the gripping portions 130a and 130b, the guide rollers 140a and 140b can keep the radius of curvature R of the band blade A constant. Can be. In addition, the fixed blocks 143a and 143b are formed in a channel cross section, and a cylinder (not shown) is preferably installed therein. By applying a constant force to the support blocks (141a; 141b) with this cylinder, it can be adapted to the elastic deformation of the band blade (A). At this time, the support blocks (141a; 141b) is preferably installed to be movable in the fixed block (143a; 143b).

On the other hand, since the first holding means (130a) and the second holding means (130b) is held in a seesaw manner, it is impossible to hold the band blade (A) at the moment of replacing the operation to hold each other. At this moment, when the band blade A is deformed without any restraint, the radius of curvature R of the band blade A may not be kept constant. In particular, when the cutting unit 500 is disposed between the transfer unit 100 and the bending unit 300, the band blade A cut at the moment of gripping replacement may try to escape from the transfer unit 100 by its own weight. . In addition, the radius of curvature R of the band blade A may be changed to reduce the bending accuracy. In order to prevent this, it is preferable to adopt a configuration in which the pressing rollers 137a and 137b pressurized in the thickness direction of the band blade A are fixed to the connection blocks 139a and 139b. As shown in FIG. 3, the pressure rollers 137a and 137b are disposed below the movable gripping blocks 131a and 131b to rotatably press the fixed gripping blocks 135a and 135b.

The pivoting means 150 is fixed while being disposed on one side rear surface of the first arm 110a and is fixed to one side rear surface of the inner rack 151a and the second arm 110b having teeth formed on the outer side thereof, and the teeth on the inner side surface. The outer rack 151b, the inner rack 151a and the outer rack 151b are formed with a pinion gear 153 meshing with each other, and the pinion gear 153 is composed of a motor 155 for forward rotation and reverse rotation.

As shown in FIGS. 1 and 2, the inner rack 151a and the outer rack 151b are preferably formed to have the same center as the center O of the radius of curvature R of the band blade A. FIG. . In addition, it is preferable that support rollers 157 rotatably fixed to the mounting block 200 fixed to the column 30 are disposed on the inner surface of the inner rack 151a and the outer surface of the outer rack 151b, respectively. . The support roller 157 stably supports the racks 151a and 151b pivoting (ie, arc motion) with respect to the center O, thereby contributing to improving bending precision.

A sensor (not shown) that detects when the motor 155 rotates forward or reverse may be attached to the mounting block 200. The sensor can control the motor 155 by measuring the arc length at which the inner rack 151a and the outer rack 151b pivot in opposite directions, and determining the measured value by a control means (not shown).

The arms 110a and 110b described above are respectively fixed to one upper surface of the racks 151a and 151b, and are pivoted together according to the turning of the racks 151a and 151b. In addition, the gripping force by the first gripping means 130a or the second gripping means 130b may be transmitted to each of the upper surfaces thereof. Therefore, the guide rail 170 is the center (O) of the radius of curvature (R) of the band blade (A) in order to more stable swing movement of the arms (110a; 110b) and to distribute the force applied to the rack (151a; 151b) It is preferable to be disposed in the mounting block 200 to have the same center. The guide rail 170 serves to support and guide the other side of the arms (110a; 110b), to help the system of the pivot means 150 to be stable circular motion. Thus, the arms 110a and 110b are pivoted while being securely fixed so that the gripped band blade A can be conveyed in a circular arc.

The bending unit 300 is described in detail in patent 182069, filed by the applicant, and will be described below.

1 and 4, the bending unit 300 is a pair of bending rotating body arranged between the guide portion 310, the guide portion 310 for guiding the band blade (A) largely 330, the bending member 350 supported by the bending rotating body 330 so as to be linearly movable, the first driving means 370 driving the bending rotating body 330, and the bending member 350 in a straight line. It comprises a second driving means 390 for driving.

The bending member 350 is inserted into the bending rotating body 330 to form a guide hole 331, and serves to connect or separate the bending rotating body 330 from each other.

The bent portion 320 is configured at the tip of the guide portion 310. As described above, the bent portion 320 is provided to pass through the center O of the radius of curvature R of the band blade A.

Through this configuration, the bending member 350 or both of the bending members 350 selected according to the bending direction are connected to the upper and lower bending rotating bodies 330 by the second driving means 390 and the first driving means ( As the bending rotor 330 is rotated by the 370, the band blade A passing through the bent part 320 may be bent in the thickness direction.

The first driving means 370 is a motor 371 which can be rotated forward or reverse, the gear 373 driven by the motor 371, and the bending body 330 engaged with the gear 373. ), And the second driving means 390 is preferably operated by a driving cylinder. This can also be controlled by the control means.

The cutting unit 500 employs the cutting machine described in US Pat. No. 80607, filed by the present applicant, and the cutting unit 500 is disposed between the transfer unit 100 and the bending unit 300 as shown in FIG. It is preferably arranged in.

In addition, it is preferable that the encoder 700 which measures the circular arc length of the band blade A is arrange | positioned.

The band blade bending device of the present invention is not limited to the above-described embodiments, and can be modified in various ways within the scope of the technical idea of the present invention.

According to the band blade bending device of the present invention as described above has the following effects.

First, by each holding means alternately gripping the band blades on the arc through the control means and the turning means turning the gripping means, ① the continuous transfer of the band blades is possible, the productivity is greatly improved and ② by the gripping force The bending precision can be improved because the circular arc of the band blade is conveyed in the state of being kept accurately.

Second, since the inner and outer racks on the arc are reciprocated in the opposite direction by forward / reverse rotation of one pinion gear, ① continuous feed can be easily achieved, and ② the structure is simple.

Third, the support rollers are disposed on the inner surface of the inner rack and the outer surface of the outer rack, so that the racks can be more stable circular arc movement to contribute to the improvement of machining precision.

Fourth, since the guide rail for guiding the other side of at least one of the respective arms is arranged to have the same center as the center of the radius of curvature of the blade, it is possible to more accurately maintain the circular motion of the band blade.

Fifth, the movable cylinder block is moved forward or backward with respect to the fixed gripping block fixed to the upper surface or the upper surface of each arm with a driving cylinder. have.

Sixth, in particular, the holding roller is provided with a guide roller for receiving and guiding the outer end of the band blade in the gripping means is installed, it is possible to maintain a more constant radius of curvature of the band blade to improve the processing precision.

Seventh, in particular, since each holding means and the guide roller are pivoted together by the same radius of curvature, the radius of curvature of the band blade can be conveyed with certainty.

Eighth, the pressing roller for pressing in the thickness direction of the band blade is arranged, it is possible to contribute even more to maintain a constant curvature of the band blade by pressing the band blade even when the respective holding means falls at the same time.

Claims (9)

In the band blade bending apparatus comprising a transfer unit for bending a band blade of the circular arc having a predetermined curvature radius in the width direction along the arc of the blade and a bending unit for bending the band blade, The transfer unit is First and second gripping means for gripping the band blades; Pivot means for pivoting the first gripping means and the second gripping means along an arc of the band blade; Band gripping apparatus, characterized in that the control means for controlling the other gripping means to release the gripping state while the gripping means of any one of the first gripping means and the second gripping means is rotated by holding the band blade. . The method of claim 1, wherein the pivot means comprises: an inner rack toothed on the outer surface; An outer rack having teeth formed on an inner side thereof; Pinion gears engaged with each other between the inner rack and the outer rack; It is provided with a motor for rotating the pinion gear forward / reverse, And the inner rack and the outer rack have the same center as the center of the radius of curvature of the band blade. The band blade bending apparatus according to claim 2, wherein support rollers are disposed on an inner diameter side of the inner rack and an outer diameter side of the outer rack. 4. The apparatus of claim 3, wherein the first holding means comprises: a first arm having one side fixed to the inner rack; A first movable gripping block; A first driving cylinder configured to move the first movable gripping block forward or backward with respect to the first arm, The second holding means has a second arm one side is fixed to the outer rack; A second movable gripping block; Band bending device comprising a second drive cylinder for advancing or retracting the second movable gripping block relative to the second arm. 4. The apparatus of claim 3, wherein the first gripping means comprises: a first fixed gripping block having one side disposed on a first arm fixed to the inner rack; A first movable gripping block; A first driving cylinder configured to move the first movable gripping block forward or backward with respect to the first fixed gripping block, The second gripping means includes a second fixed gripping block having one side disposed on a second arm fixed to the outer rack; A second movable gripping block; Band bending device comprising a second drive cylinder for advancing or retracting the second movable gripping block relative to the second fixed gripping block. The band blade according to claim 4 or 5, wherein a guide rail for guiding the other side of the first arm and the other side of the second arm is disposed to have the same center as the center of the radius of curvature of the band blade. Bending device. 6. The band blade bending apparatus according to claim 5, wherein a guide roller for guiding the outer diameter side end of the band blade is disposed. 8. The band blade bending device according to claim 7, wherein the guide roller is pivoted integrally with the respective holding means. The band blade bending apparatus according to claim 4 or 5, wherein a pressure roller is pressed to press in the thickness direction of the band blade.