JP2003311335A - Wire bender - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire bender having a wire holding member in place of a conventional center chuck of a device to bend a wire from both ends in a three-dimensional manner with a wire clamping function and a clamping and turning function of turning the wire while clamping the wire with a simple configuration, and capable of designing the thickness of the holding member to a minimum. <P>SOLUTION: In the wire bender, a holding member 1 having a pair of fingers 11 and 11 is disposed in a center, a pair of wire bending means are provided on both sides thereof in an advancing/retracting manner, and the holding member 1 is connected to the pair of fingers 11. Rack pinion mechanisms 17, 18T are fitted to keeping members 16 to keep a facing condition of the fingers in a predetermined angular range, a power of a motor 19 is transmitted via a slider 18, the keeping members 16 are movable in the directions opposite to each other so as to clamp and turn a wire W. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rod bending apparatus for bending a wire rod into various shapes.

[0002]

Wire rods such as wires, electric wires and thin pipes are used for various purposes depending on the type of material and the diameter. As an example of the usage form, for example, a hanger or a hanging tool formed by bending a wire, a simple furniture part, a spring material for a bed, or the like can be used in a wide range of fields. The bending device for bending such a linear material is
There is a one-sided bending type and a two-sided bending type. The one-sided bending type is a type in which one end of the filamentous material is grasped by a chuck mechanism, and the other end to the middle of the filamentous material is gradually bent by a bending means.

In the case of the double bending type, similarly to the schematic structure of the linear material bending apparatus of the present invention shown in FIG. 1, the central portion of the linear material is grasped by a cetane chuck and movably installed on both sides. With this bending means, the other end to the middle can be sequentially bent simultaneously or one side at a time. The double-bending type requires large equipment, requires a large installation space, and requires a large installation cost, but since both ends can be bent at the same time, the processing speed is high, mass productivity is excellent, and asymmetrical processing is also possible. Therefore, there is an advantage different from the cantilever type in that various bending processes can be performed.

[0004]

However, since the double bending type linear material bending apparatus is a type in which the center of the linear material is clamped by a center chuck installed in the center, the linear material is bent three-dimensionally. There is a problem with the mechanism that rotates the filament material during processing. The mechanism for clamping the linear material is generally arranged side by side in the width direction of the rotating mechanism and the center chuck. Therefore, the width of the center chuck becomes large and the bending means is in the state of being closest to the center chuck. There is a constraint that the distance between the bent parts cannot be reduced to a predetermined value or less when the bending process is carried out in step.

If the clamping mechanism is rotated by a rotating mechanism, the clamping mechanism has a complicated structure in order to cope with different diameters of the wire rods in the clamping mechanism, and eventually the center mechanism is The width of the chuck becomes thicker.

In view of various problems in the above-described conventional double bending type linear material bending apparatus, the present invention provides a new type linear material holding member in place of the conventional center chuck, Not only does it have the function of clamping the strip material, but it also has a simple configuration with the clamp function and the rotation function of rotating the strip material while clamping the strip material. An object of the present invention is to provide a wire rod bending apparatus having a holding member that can be designed to a minimum.

[0007]

As a means for solving the above problems, the present invention provides a holding member having a pair of fingers for holding a linear member on a substrate, and a surface orthogonal to the end of the cored bar. The pressing member is rotated around the cored bar head projecting from this molding surface as a molding surface, and a pair of linear material bending means for bending the linear material can be approached and separated from the gripping member on both sides thereof. The pair of fingers of the gripping member cause relative displacement of the fingers while holding one of the fingers with respect to the other, and the displacement allows the filament to rotate. The wire rod bending apparatus is provided with a finger relative position adjusting mechanism and is capable of freely bending the wire rod in three dimensions by rotating the wire rod held by the holding member.

The linear material bending apparatus having the above-described structure sequentially performs bending from both ends of a long linear material to efficiently process a predetermined bent product in a short time. The products to be processed include, for example, frame members in seats, armrests, hooks for mufflers, shift levers, bonnet stays, etc. as parts for automobiles, and there are various kinds other than those for automobiles. Some of these products have two-dimensional processing in one plane, but they also include products of three-dimensional processing in three-dimensional directions. Can be done.

The filament material to be bent is gripped by the central gripping member, and is bent from both ends thereof by a pair of bending means. At the first stage, bending is performed at the positions near both outer ends of the linear material, and then the bending means is gradually moved toward the center to perform bending at an intermediate position. When performing the next bending in a direction perpendicular to the processing surface, for example, three-dimensional processing will be performed if the linear material is rotated by 90 ° and then the bending is performed.

In this case, when the gripping member operates the finger relative position adjusting mechanism to relatively shift the fingers from each other, the linear member gripped between the fingers is rotated by this, and the wire is rotated by 90 °. If the next bending process is performed by the bending means after stopping at 3, the three-dimensional bending process is performed. Therefore, since the linear member can be rotated by the mechanism that relatively shifts the fingers, the holding member can be designed to have a minimum thickness and the distance between the bending positions can be reduced.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an enlarged perspective view of a main part of a linear material bending apparatus A according to an embodiment. The linear material bending apparatus A includes a gripping member 1 for gripping a linear material W at a central position of the apparatus, and a pair of gripping members 1 is provided on both sides of the gripping member 1 so as to approach and separate from the gripping member 1. The linear material bending means 2 and 2 are provided. As shown, the gripping member 1 is provided in the cover 3, and the cover 3 is installed at the central position of the vertical cover 4. In front of the cover 4, an input display member 5 for inputting an input signal of the bent shape of the linear material W and displaying data is provided movably along the rail 6.

2 to 4 are enlarged perspective views and sectional views of the holding member 1. As shown in the figure, the holding member 1 is provided with a pair of fingers 11 in a casing 10a, and the casing 10a is installed on an L-shaped substrate 10b. The pair of fingers 11 and 11 are pressed by the pressing rollers 12 _R and 12 _R at the tips of the pressing arms 12 and 12, and hold the filament W between the opposing surfaces of the two. Therefore, the presser arm 1
2, 12 and the link members 13, 13 described below, the piston rod 14, the cylinder 15, etc. form a gripping distance adjusting mechanism for adjusting the gripping distance between the fingers 11 to 11.

The holding arms 12 and 12 are provided with side plates 10c and 10c.
It is provided rotatably about shafts 12x, 12x attached to c, and link members 13, 13 are connected to the rear ends of the pressing arms 12, 12, and the link members 13, 1,
3 is connected to a connecting member 14a provided on the piston rod 14 of the cylinder 15. Further, the tip of the piston rod 14 is guided by the guide member 14 _{G for} its advance / retreat.

The bosses of the fingers 11 and 11 are fitted to the short shafts 16a and 16a provided at one ends of the holding members 16 and 16 via bushes (not shown), respectively, and the two springs 11s and 11s always keep the fingers together. The elastic members 11 and 11 are elastically held so as to be attracted to the holding members 16 and 16 in parallel. Therefore, the holding members 16 and 16 serve to hold the facing states of the fingers in parallel. Holding member 1
Rack pieces 18 _T , 18 _T are provided facing each other at positions near the other ends of 6, 16 and a pinion 17 inserted between the two engages with each other, whereby the rack pieces 18 _T , 18 _T When one moves horizontally, the other moves in the opposite direction. Since the central axis of the pinion 17 is attached to the side plates 10c and 10c, the pinion 17 can rotate but cannot move.

One of the rack pieces 18 _T is formed integrally with the slider 18, the end of the slider 18 is engaged with the ball screw 19 x, and the ball screw 19 x is rotated by an electric motor 19 whose output end is connected to the ball screw 19 x. By doing so, the slider 18 is linearly moved, whereby the fingers 11 and 11 are moved relative to each other while the wire W is held between the fingers 11 and 11, and the wire W is rotated about its center line. A relative position adjusting mechanism for driving is provided. The holding member 16 is provided with an elongated hole 16h, and a roller 16 _R is fitted therein to guide the movement of the holding member 16.

The operation of the holding member 1 having the above structure will be described with reference to FIGS. FIG. 5 shows a state in which the gripping dimension between the fingers 11 to 11 is adjusted to a small diameter when the diameter of the wire rod W is small. As shown in the drawing, the wire rod W has a smaller diameter than that of FIG. 3, and the tips of the fingers 11 and 11 are pressed by the roller 12 _R of the pressing arm 12 so as to match the diameter in order to hold it.
For this reason, the other end of the pressing arm 12 is pressed by the cylinder 15 so that the inclination of the link member 13 (opening of the arm) approaches an angle perpendicular to the center line of the piston rod 14,
The holding arm 12 is tilted by expanding the other end of the arm. In the illustrated example, the diameter of the filament material W is 3 to 6
The target is mm.

FIG. 6 illustrates the operation of rotating the filament material W while being held by the fingers 11, 11. As shown, when the motor 19 is driven to rotate the ball screw 19x and the slider 18 is moved in the direction of the arrow (right) in the figure, the rack piece 18 _T integrated with the slider 18 moves and Rack pieces 1 facing each other via a mating pinion 17
Move 8 _T in the opposite direction. Therefore, the upper and lower holding members 16 and 16 move in opposite directions and in parallel, and the fingers 11 and 1 attached to the holding members 16 and 16 are moved.
1 also moves parallel to each other and in opposite directions. Therefore, the linear material W rotates while being held by the fingers 11, 11.

It should be noted that the rotation of the wire rod W is performed by the fingers 11, 1
Since the relative movement of 1 is used, the rotation is 90 °, for example.
Without being limited to a certain degree, one rotation or more rotations can be extremely easily realized depending on the relative movement amount. Further, since such a rotation system is adopted, it is not necessary to arrange the gripping mechanism and the rotation mechanism by the fingers 11 and 11 side by side in the thickness (width) direction of the fingers 11 and 11, so that the fingers 11 and 11 are lined up. The gripping member 1 may have a minimum size necessary for gripping the strip W, and the gripping member 1 having a small width and a minimum width can be obtained.

7 to 10 show enlarged perspective views and sectional views of the linear material bending means 2. As shown in FIG. 7, the tip of the cored bar 21 has a processing head 21a with a groove, and the cored bar 21 is inserted through the hollow outer shaft 24 and the upper end is projected.
A seat 22 of a bending member and a pressing metal member 22a are detachably attached to the seat 22 of the bending member on the work surface with the upper end surface of 4 as the work surface. The large diameter portion 24a of the outer shaft 24 is a gear box 25a.
It is fitted in the protruding end of the so as to be rotatable and retractable.
There are various shapes of the processing head at the tip of the cored bar 21, which will be described later, and the cored bar 21 is detachable.
It is used by replacing it according to the purpose.

As shown in the cross section of FIG. 9, the outer shaft 24 is inserted into the gear box 25a, and the worm gear 25 rotates integrally with the outer shaft 24 at a position near the lower end thereof.
When 4 is moved up and down, it is fitted so as to be slidable in the axial direction. A worm 26a is engaged with the worm gear 25, and an output shaft of the motor 26 is connected to the worm shaft. The core metal 21 is the large diameter portion 2 of the outer shaft 24.
The inner shaft 23 is detachably connected to the inner shaft 23 at a position near 4a, and the inner shaft 23 extends through the outer shaft 24 while protruding further downward. A coupling member 27 having a claw that is detachably engaged with the claw 27k of the claw clutch is coupled to the lower end thereof.

A spur gear is formed on the outer periphery of the lower end of the connecting member 27, and a gear 28 that engages with the spur gear is provided in the gear box 25a.
The gear 28 is attached to a mounting member extending downward from the lower bottom, and an output shaft of a motor 29 for rotating the gear 28 is connected to the gear 28. The motor 29 is connected so as to rotate the inner shaft 23 to set the phase angle position of the cored bar 21 to a desired state, and is stopped during normal operation after the phase angle position is set.

When setting the phase angle, the connecting member 27 is pulled down within the thickness of the gear 28 by the elevating means to be described later to disengage the claw 27k of the claw clutch, and in that state, the motor 29 drives the internal force. When the shaft 23 is rotated to set the phase angle position, the coupling member 27 is raised again to be engaged with the claw 27k of the claw clutch and held at the set phase angle position. The type of head type of the cored bar 21 will be described later.

FIG. 10 shows a lifting means M for the inner shaft 23 and the outer shaft 24.
₁ and M ₂ are shown. The first elevating means M ₁ includes a cylinder 30 attached via an attachment member provided below the gear box 25a, and an engagement member 31 attached to a piston rod of the cylinder 30 is engaged with a groove of the connecting member 27, By projecting the piston rod, the inner shaft 23 can be lowered via the connecting member 27.

The outer shaft 24 also has a second elevating means M.₂
Is connected, and this lifting means M ₂Also in the same way
The cylinder 33 mounted through the
Under the outer shaft 24 in the groove of the engaging member 32 attached to the ton rod.
The flange of the end 24b engages and the piston of the cylinder 33
By projecting the rod, the outer shaft 2 via the connecting member
4 can be lowered.

FIG. 11 shows a core bar head 2 of the linear material bending means 2.
The various shapes and combinations of 1a and pushing metal fitting 22a are shown.
FIG. 7A is an enlarged perspective view of the cored bar head 21a and the push fitting 22a according to the first embodiment shown in FIGS. In this example, the cored bar head 21a is provided with a groove at the center of the projecting portion, and has a shape in which a bending angle is small (compared to FIG. 7C) and an intermediate angle can be set. (B)
In the figure, the groove is provided in a cross shape, and the cored bar head 21a is provided as a shape in which a bending angle is small and a large number of types (four types) can be selected.

FIG. 3C shows a case where the core metal 21 is bent to have a diameter, and the core metal 21 is used as it is as a core metal head. In addition, FIG. 7D shows an example in which a hollow pipe is bent and bent. The cored bar head 21a is a disk with a groove on the outer circumference, and the pressing metal fitting 22a is also provided with a groove. Bend the hollow pipe along the outer circumference of the grooved disk while pulling the pipe so that the cross section of the pipe does not collapse. In the above various modified examples, the seat 22 and the cored bar 2 are provided so that the cored bar head 21a and the pressing fitting 22a can be combined in various ways.
1 is detachably attached to the outer shaft 24 and the inner shaft 23, respectively, but its fixing means is not shown.

In the linear material bending means 2 having the above structure, the linear material W is bent by the core metal 21 having the grooved head 21a and the pressing metal fitting 22a. The bending process is performed sequentially from both ends of the filament material W by a pair of filament material bending means 2 and 2 while the center of the filament material W is grasped by the grasping member 1 described above. The means 2 and 2 are provided so as to be movable left and right with respect to the vertical cover 4 by the moving mechanism 30 shown in FIG.

As shown in the figure, the moving mechanism 30 is provided with a pair of left and right base plates 30a on which the bending means 2 are placed, and the respective base plates 30a are made movable on the linear guide rails 31 and engaged with the base plate 30a. The ball screw 32 is engaged with the slider to be fitted, and the ball screw 32 is connected to the output shaft of a motor (not shown) installed at both ends of the vertical cover 4,
It is provided to extend from the left and right to the center.

FIG. 13 shows an overall perspective view of the above-mentioned linear material bending apparatus. As shown in FIG. 13, during the actual bending work, the linear material is supplied from the linear material supply device by the supply arm and the height is automatically adjusted according to the shape so as to receive the lower surface of the linear material. A table E is used which is controlled so as to be changed to (movement up and down by a motor or an air motor). In particular, since the shape of the three-dimensional shape is changed, the height of the table E needs to be changed each time. As shown in FIG. 12, a part of the supply arm is provided with swing-type arms, which are gripped between the fingers 11 of the gripping member 1.

The bending action by the above-mentioned linear material bending means 2 is
Although it depends on the shape of the cored bar head 21a shown in FIG. 11, the cored bar head 21a shown in FIG. Since this cored bar head 21a is provided with a groove, the bending direction is set in advance by the motor 29 shown in FIG. 9 so that the linear material W passed to both bending means 2 can be inserted into the groove. To be done.

The wire rod W inserted in the groove of the cored bar head 21a is pushed to rotate the metal fitting 22a to give a desired bend.
The linear member W shown in FIG. 1 is bent at six places on the left and right, and shows a state immediately before the bending means 2 moves to a position closer to the center. Although all the illustrated processing shapes are two-dimensional bending processing shapes in the same plane, three-dimensional three-dimensional bending processing is also possible, and an example thereof is shown in FIG. 14 (b).

FIG. 14 is an example mainly used as an automobile part, and FIG. 14 (a) is a seat part W ₁ , (b).
The figure shows the armrest W ₂ of the seat, the (c) figure, the (d) figure shows the muffler hooks W ₃ , W ₄ , and the (e) figure shows the clothes hanging hanger W.
_{Is 5} . The processed wire materials W _{1 to} W ₅ shown in the drawing are not all processed by the cored bar head 21a of FIG. 11 (a), but are bent using any of the drawings of (b) to (d). Various types having different angles and positions are formed.

[0033]

As described above in detail, the apparatus for bending a linear material of the present invention has a gripping member having a pair of fingers installed at the center and a pair of linear material bending means on both sides thereof. Are arranged so that they can be moved toward and away from each other, and the finger relative position adjusting mechanism is provided on the fingers of the gripping member so that the fingers can be displaced relative to each other, and the linear member is rotated by the relative displacement of the fingers. While the wire rod is clamped, the wire rod can be rotated to perform three-dimensional bending, and the gripping member is a mechanism that allows the wire rod to rotate simply by relatively shifting the fingers. Since the minimum dimension can be achieved and the bending position interval of the object to be bent can be reduced, advantages such as expansion of the product to be processed can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of an apparatus for bending a filament material according to an embodiment.

FIG. 2 is an enlarged perspective view of a holding member.

FIG. 3 is a vertical sectional view of the same.

FIG. 4 is a sectional view taken along the line IV-IV in FIG.

FIG. 5 is an operation explanatory view of a holding member.

FIG. 6 is an operation explanatory view of a holding member.

FIG. 7 is an enlarged perspective view of a bending means.

FIG. 8 is a plan view of the above.

FIG. 9 is a vertical sectional view of the same.

FIG. 10 is a vertical sectional view of the same.

FIG. 11 is a partial view showing a plurality of examples of a cored bar head of a bending means.

FIG. 12 is a cross-sectional view seen near the center of FIG.

FIG. 13 is an overall schematic perspective view of a linear material bending device.

FIG. 14 is a view showing the outer shape of a bent product.

[Explanation of symbols]

1 gripping member 2 Wire material bending means 3 cover 4 vertical cover 5 Input display member 11 fingers 12 Presser arm 15 cylinders 16 Holding member 17 pinion 18 slider 19 motor

Claims (4)

[Claims] 1. A gripping member having a pair of fingers for gripping a linear member is provided on a substrate, and a surface orthogonal to a core bar end is used as a molding surface and pushed around a cored bar head protruding from the molding surface. A pair of wire rod bending means for rotating the metal member to bend the wire rod is provided so as to be able to approach and separate from the gripping member on both sides thereof, and one pair of fingers of the gripping member has one of them. A wire is gripped by the gripping member, which is provided with a finger relative position adjusting mechanism that causes the fingers to move relative to the other while holding the wire rod and allows the wire rod to rotate due to this shift. A wire bending device that allows the wire to be bent in three dimensions by rotating the wire. 2. The finger relative position adjusting mechanism is connected to each of a pair of fingers, and a rack and pinion mechanism is attached to a holding member that holds the facing states of the fingers in parallel, and one of the holding members is driven via a slider. The linear material bending apparatus according to claim 1, wherein the parts are connected and the holding members are configured to be movable in mutually opposite directions. 3. The linear material bending apparatus according to claim 1, wherein a gripping distance adjusting mechanism for adjusting a gripping distance between the fingers is connected to the pair of fingers. 4. The gripping distance adjusting mechanism adjusts the opening of the other end of the pressing lever by connecting a drive unit to a pair of pressing levers for pressing a pair of fingers and a link member connected to the other ends of the pressing levers. The wire rod bending apparatus according to claim 3, wherein the holding distance is adjusted by adjusting the gripping distance.