JPH059180B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Prior Art) There have been conventionally provided staples that are driven into pillars and the like to fix electric wires in that state. The conventional method for producing staples is to sequentially bend the wire one place at a time as shown in Fig. 15, 1, 2, and 3, cut it once it has been bent into a U-shape, and then cut the tip. A common method is to crush it to make it sharp.

However, in these methods, since the staples are bent one by one, there is a limit to the productivity, resulting in poor production efficiency.

In addition, since the staples are bent one by one, even if the staples are insulated with resin after they are manufactured, the staples must be covered one by one, which is troublesome, and at best it is similar to the technique in Japanese Utility Model Application Publication No. 57-35100. In this method, a large number of staples are arranged one by one on a conveyor, and the rotation of the conveyor transfers the staples one by one and coats them one by one, which limits the productivity improvement. Additionally, equipment costs were rising.

(Purpose) The present invention has been made to improve the above-mentioned prior art, and its purpose is to efficiently produce a U-shaped insulating coated staple.

(Structure) The present invention involves bending a wire to form a continuous rectangular wavy bent material having legs and sides, and then forming a continuous rectangular wavy bent material having a leg portion and a side portion, and then forming a continuous rectangular wavy bent material having a leg portion and a leg portion continuous thereto. This is a method for producing a coated U-shaped staple, characterized in that the central part of the leg part of the continuous rectangular wave-shaped bent material is cut. Note that the continuous rectangular wave-shaped bent material includes square waveforms and rectangular waveforms.

To form a continuous rectangular wave-shaped bent material, as shown in the drawing, the wire 5 is extended from the hoop shape, and the first bent body 1 and the second bent body 2 are rotated alternately. , it is desirable to apply the backing plate 3 to these. That is, when the wire rod 5 reaches the first bent member 1 as shown in FIG. 3, the contact plate 3 is moved upward as shown in FIG. 4, and the first bent member 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 folded part 6 is formed in this way, the contact plate 3 is lowered and the first folded body 1 is
The wire rod 5 is rotated back as shown by the two-dot chain line in the figure, and in this state, the wire rod 5 is fed one pitch by the transfer means to advance to the position shown in FIG. Wire 5 is the fifth
Once it has reached the position shown in the figure, move the cover plate 3 upward in the same manner as described above and fit it into the rectangular frame-shaped bent part A of the wire 5, and in this state as shown in Figure 5. The second folded body 2 is rotated in the direction of the arrow as shown by the solid line, thereby moving the wire 5 into the second folded body 2.
and the contact plate 3 to form the bent portions 7 and 8 in the wire rod 5 at right angles. In this way, the bent part 7,
8, the second bending body 2 is rotated back while lowering the contact plate 3 in the same manner as described above, and in this state, the wire rod 5 is fed one pitch by the transfer means, and the wire rod 5 is moved as shown in FIG. Proceed to the indicated position. 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. The first folded body 1 shown in FIG. 6 is rotated in the direction of the arrow, thereby causing the wire rod 5 to be
is pressed again to form a right-angled bent portion in the wire 5.

By repeating the above steps, the leg 3
A continuous rectangular wavy bent material 30 having sides 1 and 32 is formed.

Note that the first folding body 1 is provided so as to be rotatable about one end, and is also provided so as to be rotatable back. 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 be either right-angled as shown or rounded (not shown); in short, it is sufficient that the adjacent sides of the corner 1a are orthogonal.

The second folding body 2 is provided opposite to the first folding body 1, and is rotatable around one end and is rotatable back. It is. 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. .

The contact plate 3 is applied to the first folded body 1 and the second folded 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.

Next, the continuous rectangular wave-shaped bent material 30 is coated. The coating treatment applied to the rectangular wave-shaped bent body 30 is primarily intended to insulate the staples, but it may also be for the purpose of mere surface treatment or for other purposes. As coating treatment,
As shown in FIG. 7, it is desirable to apply resin 11, such as polyvinyl chloride, in a U-shape on both ends of the continuous rectangular bent material 30. In coating the resin 11, it is preferable to pour liquid resin from above or by dipping. Note that after the staple is coated, it is desirable to remove the coating from both ends 30a of the rectangular wave-shaped bent material 30. The main reason for removing it is to prevent the hammer from slipping when driving the staple. In this case, as shown in FIG.
The coating on both ends 30a of the rectangular wave-shaped bent material 30 may be removed by rotating the rotary roll 12 provided on the side, or by using a long rotary roll as shown in FIG. 13 so that its axis 14 is along the continuous direction of the rectangular wavy bent material 30, and by rotating the rotating roll 13, the coating on both ends 30a of the rectangular wavy bent material 30 can be removed. good. In the case shown in FIG. 8, a long rotating roll 1
3, the coating on both ends 30a of the rectangular wave-shaped bent material 30 can be removed more uniformly.

After performing the coating treatment in this manner, it is desirable to heat and solidify the resin 11 by infrared heating or the like. If infrared heating is used, the heating time is short due to its high thermal efficiency.

Once the rectangular wave-shaped bent material 30 has been coated as described above, the next step is to cover the rectangular wave-shaped bent material 30 as shown in FIG.
The rectangular wave-shaped bent material 30 is cut at the position , thereby producing U-shaped staples in one batch. When cutting the rectangular wave-shaped bent material 30, it is desirable to crush the tip to make it sharp.

Incidentally, when coating the continuous rectangular wave-shaped bent material 30, a structure as shown in FIG. 11 may be used. Specifically, in the case of the example shown in FIG.
Tanks 17 and 18 storing the first grade are provided, and furthermore, preheating devices 19 and 20, drip removing device 21, and heating device 22 are provided.
The rectangular bent material 30 is sequentially transferred as the large diameter rolls 15 and 16 are rotated, and the rectangular wavy bent material 30 is preheated by the preheating device 19.
Approximately half of the rectangular wave-shaped bent material 30 is immersed in the resin 11 in the tank 17, the drippings of the resin are wiped off by the drip removing device 21, the resin is heated and solidified by the heating device 22, and then the resin is heated and solidified by the preheating device 20. The resin 1 in the tank 18 is heated approximately half of the rectangular wavy bent material 30.
1, the drippings of the resin are similarly wiped off using the other dripping device, and the resin is heated and solidified using the other heating device. The preheating device 23 is a device for crushing the tip of the rectangular wave-shaped bent material 30 and a cutting device for cutting the center portion.

In addition, as shown in FIG. 12, large diameter rolls 24, 25,
26, 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 roll 25,2
7 also serves as a drip removing device.

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

(Effects) The present invention bends a wire rod to form a continuous rectangular wavy bent material having legs and sides, and then forms a continuous rectangular wavy bent material having legs and sides, and then forms a continuous rectangular wavy bent material having a leg portion and a leg portion continuous thereto. Since the structure is such that the legs are coated and then the central part of the legs of the continuous rectangular wavy bent material is cut, coated U-shaped staples can be efficiently produced. Coating each staple one by one eliminates the hassle. Furthermore, the coating process can be incorporated into the process during the production of U-shaped staples. Therefore, unlike the conventional case where U-shaped staples are produced and then the coating process is performed one by one, and the staple production process and the coating process are separate, it is possible to The coating process is integrated into the process, so the 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 a plan view showing the process of forming a rectangular wave-shaped bent material, FIG. 2 is a side view of the same, and FIGS. 3 to 6 7 is a plan view showing the action of rotating the first folded body and the second folded body to form a rectangular wave, FIG. 7 is a plan view of the entire structure incorporating the coating process, FIGS. FIG. 9 is a plan view showing the action of removing the coating from both ends of the rectangular wave-shaped bent material, and FIG. 10 is a front view of the staple after the coating process has been performed. FIGS. 11 and 12 are side views of an apparatus for illustrating alternative coating processes, respectively. FIGS. 13 and 14 are a longitudinal sectional view and a transverse sectional view of the apparatus for illustrating another example of the coating process. FIG. 15 is a conventional side view showing the manufacturing process of staples. 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,
Reference numeral 11 indicates a resin, and 30 indicates a rectangular wave-shaped bent material.

Claims (1)

[Claims] 1. Bending the wire rod to form a continuous rectangular wave-shaped bent material having legs and sides, and then coating the sides of the continuous rectangular wave-shaped bent material and a part of the legs continuous thereto, 1. A method for manufacturing a coated U-shaped staple, the method comprising: cutting the continuous rectangular wave-shaped bent material at the center of the leg;