JPH0120935B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for bending a wire into a rectangular wave shape, and an apparatus for bending a wire into a rectangular wave shape, which is suitable for producing a rectangular wire rod whose adjacent sides are orthogonal, such as a staple. Regarding.

(Prior Art) A device shown in FIG. 12 has been known as a device for bending a wire into a continuous wave shape.
This device has two pins 42 planted at a predetermined interval in a disc 41, a wire 5 is passed between the pins 42 in a Z shape, and the wire 5 is waved by moving the disc 41 forward and backward. It is designed to bend into a shape. However, with this device, it is difficult to feed the wire, and the wave shape tends to be uneven.

FIG. 13 shows a device that is equipped with a pair of gear-like rotating bodies 43 having wave-forming teeth 44 on the circumferential surface, and that bends the wire into a wave shape by biting the wire between the rotating bodies 43. It is. Furthermore, FIG. 14 shows a device in which wave-forming teeth 45 are continuously provided on endless running bodies 46 that run opposite each other, and the wire is bent into a wave shape by biting the wire between the running bodies 46. . However, these devices have the problem that when the wire after being formed into a wave shape is sent out from the rear of the rotating body or running body, the waves may be deformed or crushed by hitting the wave-forming teeth, and the wire rod may be damaged by the adjacent waves. It is difficult to form waves whose sides are orthogonal.

(Objective) The present invention has been made to improve the above-mentioned prior art, and its object is to reliably and efficiently produce a U-shaped rectangular wave.

(Structure) The present invention will be described below with reference to embodiments shown in the drawings.

Reference numeral 1 denotes a first folding body, which is rotatably provided around one end and rotatably returned. The first bent body 1 may be rod-shaped or plate-shaped, and its length is not limited to the example shown in the drawings.
The corner 1a of the first folded body 1 may have a right angle shape as shown, or a rounded shape (not shown); in short, it is sufficient that the adjacent sides of the corner 1a are perpendicular to each other.

Reference numeral 2 denotes a second folding body provided opposite to the first folding body 1, which is rotatable around one end and rotatable back. It is something that exists. Here, the first folding body 1 and the second folding body 2 rotate alternately. That is, in FIG. 4, when the first folding body 1 is rotating as shown by the solid line, the second folding body 2 is in the returning rotation state. Further, in FIG. 5, when the first folding body 1 is in the return rotation state, the second folding body 2 is rotating as shown by the solid line. In addition, the corner 2a of the second bent body 2 may have a right-angled shape as described above, or a rounded shape (not shown); in short, it is sufficient that the adjacent sides of the corner 2a are perpendicular to each other. .

Reference numeral 3 denotes a contact plate, which is applied to the first folding body 1 and the second folding body 2 to clamp the wire when they alternately rotate. The contact plate 3 is made to move up and down by operating the cylinder 4 as shown in FIG. 2, and when the first folding body 1 or the second folding body 2 rotates, It is desirable to have a configuration in which it moves upward and is applied to the first folded body 1 or the second folded body 2.

When bending down into continuous rectangular waves,
As shown in the drawing, it is desirable to extend the wire 5 from a hoop shape, rotate the first folded body 1 and the second folded body 2 alternately, and apply the backing plate 3 to them.
That is, when the wire 5 reaches the first bent body 1 as shown in FIG. 3, the contact plate 3 is moved upward as shown in FIG. 4, and the first bent body 1 is moved in the direction of the arrow. As a result, the contact plate 3 and the first bending body 1 press the wire 5 to form a bent portion 6 in the wire 5 at a right angle. Once the bent portion 6 is formed in this way, the contact plate 3 is lowered and the first bent body 1 is rotated back as shown by the two-dot chain line in FIG. Then, the wire rod 5 is advanced one pitch to the position shown in FIG. When the wire rod 5 has advanced to the position shown in FIG.
is moved upward to fit the contact plate 3 into the rectangular frame-shaped bent part A of the wire 5, and in this state, as shown in FIG. 5, move the second bent body 2 in the direction of the arrow as shown by the solid line. By rotating the wire rod 5, the second bending body 2 and the contact plate 3 press the wire rod 5, thereby causing the wire rod 5 to have the bent portions 7 and 8.
form a right angle. Once the folded portions 7 and 8 are formed in this manner, the second folded body 2 is rotated back while lowering the contact plate 3 in the same manner as described above, and in this state, it is fed one pitch by the transfer means. , the wire 5 is advanced to the position shown in FIG. When the wire rod 5 has advanced to the position shown in FIG. 6, the cover plate 3 is moved upward in the same manner as described above, and the cover plate 3 is fitted into the rectangular frame-shaped bent portion B of the wire rod 5. As shown in FIG. 6, the first folding body 1 is rotated in the direction of the arrow, and thereby the first folding body 1 and the contact plate 3 press the wire rod 5 again, thereby making the wire rod 5, a bent portion is formed at a right angle.

Incidentally, such a device according to the present invention can be used in a device for manufacturing staples. That is,
By forming the rectangle produced by the above-described apparatus into a continuous rectangular wave 30, and then cutting the central part of the rectangular wave at the position of the chain double-dashed line 10 as shown in FIG. 30 is subjected to a coating treatment for the purpose of insulating the staples, and the central part of the rectangular wave 30 is cut at the position of the two-dot chain line 10 shown in FIG. 7, thereby producing U-shaped staples in bulk. be able to. In this case, the square wave 30
When cutting the central portion of the material, it is desirable to crush the tip to make it sharp.

Incidentally, when coating the continuous rectangular waves 30, a configuration as shown in FIG. 8 may be used.
That is, in the case of the example shown in FIG. 8, a continuous rectangular wave 30 is laid across large-diameter rolls 15 and 16 that can be driven to rotate, and a tank 1 in which resin 11 and the like are stored.
7 and 18 are provided, and furthermore, preheating devices 19 and 20, a drip removal device 21, and a heating device 22 are provided.
0 is sequentially transferred, the rectangular wave 30 is preheated by the preheating device 19, approximately half of the rectangular wave 30 is immersed in the resin 11 in the tank 17, and the dripping of the resin is wiped off by the dripping device 21 and heated. The resin is heated and solidified by the device 22, further preheated by the preheating device 20, and approximately half of the rectangular wave 30 is heated to the resin 11 in the tank 18.
Similarly, the drippings of the resin are wiped off using the other dripping device, and the resin is heated and solidified using the other heating device. Note that 23 is a device for crushing the tip of the rectangular wave 30 and a cutting device for cutting the center portion.

In addition, as shown in FIG. 9, large diameter rolls 24, 25, 2
6, 27, preheating devices 28, 29, tanks 31, 32 in which the resin 11 is stored, a heating device 33, and a crushing and cutting device 34 may be arranged. Furthermore, large diameter rolls 25, 27
also serves as a drip removal device.

Furthermore, when coating the continuous rectangular wave 30, a tank 35 is provided on both sides of the rectangular wave 30 as shown in FIGS. Both ends 30a of the rectangular wave 30 may be continuously coated with the resin by passing the resin 11 through the rectangular wave 30 and flowing the resin 11 from above.

(Effects) As described above, according to the apparatus according to the present invention, continuous rectangular waves can be efficiently produced, and adjacent sides of the rectangular waves can be reliably made orthogonal. Therefore, a rectangular wave having a uniform shape can be obtained.

Further, according to the apparatus according to the present invention, it can be used as a staple manufacturing apparatus. That is, by cutting the central portion of the continuous rectangular wave, U-shaped staples can be efficiently produced. Furthermore, by coating the continuous rectangular waves and then cutting the central part of the rectangular waves, the coating process can be integrated into the process of producing U-shaped staples.
Therefore, work can be done in series, which is useful for improving production efficiency and reducing production equipment.

[Brief explanation of drawings]

The drawings show a typical example of the present invention, and FIG. 1 is an overall plan view showing the manufacturing process, and FIG.
The figures are the same side views, and FIGS. 3 to 6 are plan views showing the action of rotating the first folded body and the second folded body to form a rectangular wave, and FIGS. The figure is a plan view of the entire apparatus incorporating the coating process, and FIGS. 8 and 9 are side views of the apparatus to show different examples of the coating process. FIGS. 10 and 11 are a side sectional view and a cross sectional view of the apparatus for illustrating another example of the coating process. 12 to 14 respectively show the main parts of the conventional device, with FIG. 12 being a perspective view, and FIGS. 13 and 14 being side views. In the figure, 1 is the first folded body, 2 is the second folded body,
3 is the backing plate, 5 is the wire rod, 6, 7, 8, 9 are the bent parts,
11 represents resin, and 30 represents a rectangular wave.

Claims (1)

[Claims] 1. A first folding body that is rotatable about one end and rotatable back, and a first folding body that is provided opposite to the first folding body and alternating with the first folding body about the one end. A second folding body that can be rotated and rotated back; and a plate that is applied to the first folding body or the second folding body and clamps the wire when the first folding body or the second folding body rotates. A device for bending a wire into a rectangular wave shape.