JP2002028742A - Forming method of continuous staple chain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forming method of a staple chain 3 in which the integrated stable chain 3 can be formed in a highly efficient manner by continuously adhering a stable 1 with both legs 2 of the inverted U-shape formed on a pointed leg tip 7 inclined in the width direction of a flat wire. SOLUTION: In this forming method, a flat wire strip 5 formed by rolling a round wire into a flat wire in a previous step and adhered to each other is fed in the forward direction to a cutting position C, and cut in the strip direction of the flat wire strip 5, the flat wire strip 5 is cut along a single cutting line 13 by an upper cutting blade 12A and a lower cutting blade 12B provided with a saw-tooth V-shaped cutting blade 11 on an opposing surface to form a staple chain stock plate 6 cut to the development length L of the staple chain 3 to be formed, successively, the staple chain stock plate 6 is fed to the bending position BE and press-bent in an inverted U-shaped channel, and the staple chain 3 with both lower ends in a saw-tooth is successively and continuously formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a staple chain in which U-shaped nail staples mainly used for woodwork are juxtaposed and bonded to form an inverted U-shaped groove.

[0002]

2. Description of the Related Art Staples widely used in house construction and the like are formed into an inverted U-shaped grooved staple chain in which a large number of staples such as 100 are adhered side by side, and the staple chain is stapled. It is poured into wood while filling the filling machine and sequentially removing one by one. The staple chain is formed by the following two methods.

That is, one of them (see FIG. 6) is to pull out 100 round wires W of a wire from a reel stand (not shown) at the same time, form a parallel plate, and form a flat wire at a rolling position R. 4 and then successively fed to the bonding position P, processed into a flat wire strip 5 with line-to-line bonding, and once wound up. Subsequently, the staple 1 is transferred to another line, rewound, pulled out, and cut at a cutting position C, "having the same length as the developed length L of the staple 1 to be cut and molded in a direction orthogonal to the longitudinal direction of the flat wire strip 5 at a time. Is successively cut into the staple chain base plate 6 of FIG. 6, and then the staple chain base plate 6 is transferred to a bending position BE and press-bent, and the staple 1 shown in FIG.
Are formed into a staple chain 3 integrally formed by bonding and juxtaposition.

Another conventional staple forming method (see FIG. 7) is to pull out one round wire cord W one by one and process it into a single flat wire 31 at a rolling position R, and then to process the flat wire 31 at the rolling position R. The single wire 31 is cut to a predetermined length L by the “upper cutting blade 32 and lower cutting blade 33 shown in FIG. 7 (C)” at the cutting position C and “the staple element having both ends tapered in the line thickness direction. Wire 30 "
Subsequently, the staples are sequentially fed to a bending position BE and bent one by one to form a U-shaped staple 1. Thereafter, the staples 1 are filled into a feeder magazine or the like and mutually bonded through the bonding processing position P.
A plurality of staples 1 shown in (B) are juxtaposed and bonded to form an integrated staple chain 3.

[0005]

The conventional staple forming method shown in FIG. 6 is a multi-wire forming method in which a number of round wire wires W are simultaneously pulled out and processed sequentially in a parallel set posture. Although the forming process of the staple chain 3 can be performed very efficiently, the lower end of the foot 2 of each staple 1 is a flat end perpendicular to the height direction, so that the staple 1 lacks the ability to be driven into wood.

On the other hand, according to the forming method shown in FIG. 7, the individual staples 1 have a knife-toe-shaped tip and are excellent in driving into wood, but the round wire W is pulled out one by one. Therefore, since the staple 1 is formed by a single wire forming method, the molding productivity of the staple chain 3 is particularly poor, and the molding cost of the staple 1 becomes extremely high.

[0007] The present invention provides a staple forming method which solves the above-mentioned disadvantages of the prior art.

[0008]

The staple forming method according to the present invention which solves the above technical problem is described as follows. In forming the inverted U-shaped staple chain, the flat staples are sequentially fed to a cutting position provided with a saw blade in the width direction of the flat staples, Forming a staple chain base plate cut to the length of the development length of the chain, and then sequentially feeding the staple chain base plate to a bending position and bending it into an inverted U shape, The staple chain having a saw-toothed end is formed continuously and continuously.

In other words, the method for forming and processing a staple chain according to the present invention is characterized in that the staples constituting the staple chain are formed into a pointed toe shape in which the lower ends of the staples are shaped like knife blades.
It is characterized by batch forming by multi-wire method, and the tip of its tip is clamped in the biaxial direction of width and thickness when cutting flat wire strip. Molding is performed with the parallel positions of the flat wires locked together.

[0010] The flat strip is cut by a simple cutting method using a single cutting line or cut and separated by cutting two parallel cutting lines. A cutting method for making the shapes of the cut ends to be paired symmetrical to each other, or a form in which a “taper portion for plastically deforming a flat wire into a taper in a wire thickness direction” is added to the saw blade-shaped cutting blade. With the cutting blade of (1), an aspect of a processing method in which the cut end of the flat line is formed into a pointed toe shape inclined in the biaxial direction is adopted.

[0011]

According to the method of forming a staple chain according to the present invention described above, a staple chain in which staple groups having pointed toes are adhered and juxtaposed can be formed continuously and continuously in a multi-line system, as shown in FIG. The efficiency of the forming process is particularly improved as compared with the conventional single wire forming method. And, since the toes of the individual staples constituting the staple chain can be formed by a cutting blade of a flat wire strip into a "knife blade form in which the staple is inclined and cut in the line width direction", the specific toe of the pointed toe is The shape can be changed according to the application of the staple, and the tip of both feet of a single staple can be formed in the opposite direction of the tip, so that the staples can be driven and clinch to wood. Further improvements can be made.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment of the present invention will be described with reference to FIGS. That is, in the same pre-process as the conventional forming method shown in FIG. 6, in forming the staple chain 3 by sequentially feeding the band-shaped continuous flat wire strip 5 in which the flat wires 4 are adhered in parallel, the cutting process is performed. In a position C, the flat wire strip 5 is cut and separated along a single sawtooth cutting line 13 by a cutting blade 10 having a V-shaped sawtooth cutting blade 11 to form a staple chain 3 to be formed. The staple chain base plate 6 having the development length L and the equal length L is sequentially and continuously formed.

Subsequently, the staple chain base plate 6 is sequentially fed to a bending position BE and press-bend-processed, and the lower end of the foot 2 is set to a "knife blade-like pointed foot inclined in the line width direction of the flat wire 4". One group of staples with 7 points (approximately 100)
The staple chain 3 is formed into a reverse U-shape in which the adhesives are juxtaposed, and the lower ends on both sides are formed into a saw blade shape.

More specifically, the cutting blade 10 at the cutting position C in this embodiment (see FIGS. 1B and 1C) has a V-shape in which two adjacent line widths 2B of the flat strip 5 are one. The upper cutting blade 12A and the lower cutting blade 12B on the fixed side are set in such a manner that the saw blade-shaped cutting blades 11 can be engaged with each other. Is cut along the "single saw-shaped single cutting line 13" to form and continuously form the staple chain base plate 6 in succession, and then the bending process comprising the press bending dies 28 and 29 shown in FIG. The staples 3 are sequentially fed to the position BE by a conveying means such as an air shooter or the like, and are plastically deformed into U-shaped grooves by the press bending die to form the staple chain 3 sequentially and continuously.

When the flat wire strip 5 is cut by the upper cutting blade 12A and the lower cutting blade 12B at the cutting position C in this embodiment, the V-shaped saw blade-shaped cutting blade 11 is divided into individual flat blades. Since the cutting is performed with a cutting edge that is inclined in the width direction of the wire 4, the shape of the flat wire strip 5 and the cut staple chain element plate 6 are completely prevented from being deformed by an external force that separates the bonded flat wire 4 as described below. It is cut by the work clamp method described above.

That is, (see FIGS. 2 (A) and 2 (B)), in the cutting press of the flat strip 5 in which the upper cutting blade 12A is attached to the press ram 20 and the "lower cutting blade 12B is fixed to the press bed 21". On the press body side near the upper cutting blade 12A, a pressing clamp plate 25 for pressing and clamping the upper surface of the flat wire strip 5 and a sandwiching clamp plate 26 for holding and clamping the width direction of the flat wire strip 5 are operated by a hydraulic cylinder. A work bed 22 is provided on the work take-out side of the cutting press so as to be vertically movable by a coil spring 23. The work bed 22 also has a holding clamp plate similar to that described above. There is provided a clamping means including a clamp plate 25 and a clamp plate 26.

Then, the thickness direction and width direction of the flat wire strip 5 which is inserted and set between the upper and lower cutting blades 12A and 12B and protrudes to a predetermined length L is defined by the holding clamp plate 25 and the sandwiching clamp plate 26. And the upper cutting blade 12
A is lowered, and the staple chain base plate 6 in which the flat strip 5 is cut along the cutting line 13 is moved to the work bed 2.
It descends automatically with the clamp set at 2.

Thereafter, the work bed 22 is raised and returned by the spring urging force, and at the same time, the clamp plate 25.
26 is set in an unclamped state, the cut staple chain base plate 6 is sequentially fed to the next bending position BE, and the next staple chain base plate 6 is located between the cutting blades 12A and 12B. The flat strip 5 to be processed is sequentially fed. In the work clamp method described above, the flat strip 5 of the work is locked and cut, so that any of the flat wires 4 of the staple chain base plate 6 and the flat strip 5 to be cut and separated is broken. And high quality cutting can be performed.

The individual staples 1 of the staple chain 3 formed in the above embodiment (see FIG. 1 (B)) are knife-tips in which the lower ends of the legs 2 on both sides are inclined in one direction of the flat line width. Since the tip of the foot 2 becomes the tip 7, and the inclination of each edge of the foot 2 on both sides is in the opposite direction, the driving performance of the wood is extremely good. Since the inclination directions of the pointed toes 7 are opposite to each other,
Since the driving resistance of the pointed toes 7 is opposite to each other and is driven into the wood and twisted as indicated by the dotted line in FIG. is there.

Next, another embodiment of the present invention will be described with reference to FIG. That is, in the forming method shown in FIG. 3, the flat strip 5 is sequentially transferred to the cutting position C and the bending position BE to form the staple chain 3 in the same manner as in FIG. The embodiment shown in FIG. 3 employs a "cutting blade 15 having the saw blade-shaped cutting blade 11 on two parallel surfaces" shown in FIG. 3C. A cutting method is used in which a cutting scrap 16 having the same shape as that described above is cut and dropped, and at the same time, the cut scrap is cut to form a V-shaped saw blade shape in which opposing cut ends are symmetrical with respect to the center line 17 as an axis.

That is, the saw blade 11 of the cutting blade 15 of the embodiment shown in FIG. 3 is also required to be a V-shaped blade having a width 2B which is the same length as the two widths 2B of the flat wire 4 of the flat wire strip 5. The staple chain base plate 6 cut into the length L is formed and cut into a symmetrical V-shaped saw blade shape. Then, the staples 1 are sequentially fed to the bending position BE to form a set of staples 1 each having a knife-shaped pointed tip 7, and the staple chain 3 having a saw blade-like lower end shape on both sides is sequentially and continuously formed.

In the above-described embodiment shown in FIG. 3, since the cutting method is to drop the cutting scrap 16 downward, it is necessary to "spring elastically" the staple chain base plate 6 on the cut side as shown in FIG. And the cutting process is simplified. In the embodiment of FIG. 3, the shape of the saw blade tips 11 on both sides of the cutting blade 15 is arbitrarily set to “a V-shape that is asymmetrical on both sides and unequal on both sides”, etc., with the technical intent of simplifying the cutting process. In some cases, as in the case of FIG. 1, a pair of cut ends may be cut into a shape capable of meshing with each other.

Next, a molding method according to another embodiment of the present invention will be described with reference to FIG. That is, this embodiment shown in FIG. 4 employs a method in which the pointed toes 7 at the lower ends on both sides of the staple chain 3 formed in the embodiment shown in FIGS. The machining position C (see FIG. 4 (D)) forms a V-shaped blade edge facing the flat wire strip 5, and the cutting blade 10 in the embodiment shown in FIGS.
Upper cutting blade 12A having the same "saw blade-shaped blade edge 11 having an inclined surface in the line width direction of the flat wire 4" and having the blade edge opposed to the blade 15
And a cutting blade 19 comprising a lower cutting blade 12B. The cutting blade 19 cuts the flat strip 5 along the cutting line 13 to form the staple chain base plate 6 having a predetermined length L. Each of the flat wires 4 is plastically deformed by the V-shaped blades of the blade 12A and the lower cutting blade 12B (see FIG. 4B).
Both ends of the flat wire 4 of the staple chain base plate 6 are
The tapered portion 18 is formed into a biaxially inclined pointed shape by plastic deformation in the direction of thickness T in the direction of the slant cutting end by the saw blade-shaped cutting blade 11.

Then, the staple chain base plate 6 is sequentially fed to the bending position BE and the staples 1 having the biaxially inclined pointed toes 7 shown in FIG. 3 is sequentially and continuously formed. Staple chain 3 formed in the embodiment of FIG.
Since the individual staples 1 have the biaxially inclined pointed toes 7, the staples 1 can be extremely easily driven into wood.

The above-described forming method of the embodiment shown in FIGS. 1 to 4 is different from the conventional processing method of FIG. 7 in which the lower end of each staple 1 is shaped like a knife blade by a single wire method. In addition, the processing efficiency is increased to an ultra-high efficiency of 50 times or more, and the processing cost of the staple 1 with the tip 7 is significantly reduced.

The method of forming and processing the staple chain 3 of the present invention is not limited to the above-described embodiment, and the staple chain 3 as shown in FIG. 5 is taken into consideration in consideration of the line width of the flat wire 4 and the durability of the cutting blade. The body base plate 6 may be “V-shaped cut into four to six flat wires 4 as one block”, one or more right-angled triangular cuts of the flat wire 4, or a wavy saw blade shape. .

[0027]

As described above, the method for forming and processing a staple chain according to the present invention makes it possible to provide a very inexpensive provision by particularly improving the formability of a staple chain with pointed toes. In addition, there is an effect of improving the quality by driving and clinching the wood by adjusting the inclination shape of the tip of the tip.

[Brief description of the drawings]

FIG. 1 shows a method for forming and processing a staple chain according to a first embodiment of the present invention, and FIG.
(B) is a perspective view of a formed staple, and (C) is a perspective view of a cutting blade.

2A and 2B show a basic form of a cutting position and a bending position in the embodiment of FIG. 1, wherein FIG. 2A is a perspective view of the cutting position, FIG. 2B is a front view of the cutting position, and FIG. A perspective view of the bending position

3A and 3B show a forming method of a staple chain according to another embodiment of the present invention, wherein FIG. 3A is an explanatory view of the forming method, FIG. 3B is a perspective view of the formed staple, and FIG.
Is the cross section of the cutting blade

4A and 4B show a forming method of a staple chain according to another embodiment of the present invention, wherein FIG. 4A is an explanatory diagram of the forming method, FIG. 4B is a cross-sectional view of a cut end of a flat wire strip, C) is a perspective view of a formed staple, and (D) is an explanatory perspective view of a cutting process.

FIG. 5 is a plan view of a cut shape of a staple chain base plate according to another embodiment of the present invention.

6A and 6B show a conventional method of forming and processing a staple chain, wherein FIG. 6A is an explanatory view of the forming process, and FIG. 6B is a perspective view of the formed staple.

7A and 7B show a conventional method for forming and processing a staple chain, wherein FIG. 7A is an explanatory diagram of the forming process, FIG. 7B is a perspective view of the formed staple, and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Staple 2 Staple foot 3 Staple chain 4 Flat wire 5 Flat wire strip 6 Staple chain base plate 7 Pointed tip 10.15.19 Cutting blade 11 Saw blade-shaped cutting blade 12A Upper cutting blade 12B Lower cutting blade 13 Cutting line 18 Taper part 21 Press bed 22 Work bed 25 Pressing clamp plate 26 Nipping clamp plate 28/29 Press bending type W Round wire R Rolling position P Bonding position C Cutting position BE Bending position

Claims (4)

[Claims] 1. A method for forming an inverted U-shaped staple chain by feeding a plurality of flat wire strips having the same wire width to each other to form a reverse U-shaped staple chain. The flat wire strip is sequentially fed to a cutting position provided with a cutting blade having a saw blade shape in the direction to form a staple chain base plate cut to the length of the developed length of the staple chain. Then, the staple chain body is sequentially fed to the bending position to
A method of forming a staple chain, wherein the staple chain is formed into a V-shape, and is sequentially and continuously formed into a staple chain in which the lower ends of both sides have a saw blade shape. 2. The method of forming a staple chain according to claim 1, wherein the flat strip is cut by a single cutting line, and the saw-toothed cut surfaces facing each other are cut into a shape capable of meshing with each other. 3. A flat wire strip is cut with a pair of parallel saw blade-shaped cutting blades crossing the flat wire strip, and the opposite saw blade-shaped cut ends are processed into a symmetrical shape. Staple chain forming method. 4. The flat wire strip is cut by a saw blade having a tapered portion having a tapered portion inclined in the thickness direction of the flat wire strip. 2. The method for forming a staple chain according to claim 1, wherein the cut end of the wire is formed into a biaxially inclined shape by slant cutting by the saw blade-like cutting blade and plastic deformation by the tapered portion.