JPH09300283A - Grip construction for end part of wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a wire from slipping out of a nipple even if the diameter of the wire is small by inserting a hollow wire into the spread diameter part of the nipple, passing the wire rod through the hollow wire rod and inserting into the through hole so as to lock the projecting part with the nipple, and pressedly fitting the wire directly to the nipple and simultaneously pressedly fitting it to the nipple through the hollow wire. SOLUTION: The through hole of the center part of a shell-shaped nipple 60 is provided with a large diameter part 61a and a small diameter part 61b, a conical insert guide port 63 is provided on the inlet of the large diameter part 61a on the extreme end side of the shell-shape, and a hollow wire 40 is inserted into the large diameter part 61a through the insert guide port 63. The length of the hollow wire 40 is set so as to project the extreme end part 42 from a wire rod fitting device 20. A wire 30 is inserted through the nipple 60 with the hollow wire 40 inserted therin, the end part 31 of the wire 30 projecting from the small diameter part 61b is crushed into a flat shape, and the wire 30, the hollow wire 40, and the nipple 60 are integrated by pressing the nipple 60. Then the wire 30 is through the hollow wire 40 at the large diameter part 61a, and directly at the small diameter part 61b, respectively pressedly fitted and fixed to the nipple 60.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for holding an end portion of a wire material such as a wire or a piano wire used for cutting a semi-plastic material such as lightweight cellular concrete.

[0002]

2. Description of the Related Art Usually, a plastic mortar block before being made into lightweight cellular concrete is cut with a wire material such as a piano wire. That is, the wire rod is grasped at both ends by the grasping mechanism and is relatively moved while maintaining a predetermined tension to cut the semi-plastic material. Various gripping mechanisms for this wire have been proposed in the past.
No. 5832, “Structure for gripping end portions of wire for cutting semi-plastic material” is cited. According to this, as shown in the cross-sectional view of FIG. 4, a hollow wire (4) made of copper is attached to the spherical nipple (50).
The wire rod (30) is inserted through the wire rod (0), the tip of the wire rod (30) is flattened, and the spherical nipple (50) is pressed and caulked to make the wire rod (30) spherical nipple (50). Fixed to. In this structure, when the spherical nipple (50) is crimped, the hollow wire (40) is soft, so that the wire (30) is efficiently used in the spherical nipple (5).
0) is closely attached. Here, the purpose of using the hollow wire rod (40) is to project the tip end (42) from the wire rod attaching device (20) as shown in the perspective view of FIG. The wire rod (30) is attached to the attachment device (2
This is to prevent abrasion and the like from directly hitting 0). Conventionally, the distance in the semi-plastic material through which the wire (30) cuts before being broken was about 300 m, but this has been improved to 600 m or more, and the life of the wire (30) has been extended. However, in this structure, when the wire rod (30) is thinned in order to make the cut surface of the semi-plastic material (10) smoother, the contact area is reduced and the wire rod (30) easily comes off from the nipple (50). was there.

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention has been made in view of the above problems, and an object thereof is to effectively adhere a wire having a small diameter so as not to come off from the nipple. Is to provide an end gripping structure of the.

[0004]

In order to achieve the above object, a wire rod end gripping structure of the present invention is a wire rod end gripping structure for cutting a semi-plastic material. The nipple is provided with a hole and a hollow wire rod having one end inserted into the enlarged diameter portion and the other end protruding from the wire rod attaching device.The wire rod is inserted into the through hole through the hollow wire rod, and the protruding portion thereof is the nipple. Further, the wire rod is directly crimped to the nipple at the small diameter portion and is crimped to the nipple at the large diameter portion via the hollow wire rod. Compared with the prior art, the diameter of the through hole provided in the nipple is changed to a two-stage type, the wire material is directly crimped to the nipple at the small diameter portion, and indirectly through the hollow wire material at the large diameter portion. It differs in that it is crimped to the nipple. With this structure, both the wire rod and the hollow wire rod are effectively pressed against the nipple. And preferably, Young's modulus and strength are lowered in the order of wire rod> hollow wire rod> nipple. In particular, when the relationship of hollow wire> nipple is satisfied, the bending of the wire can be effectively prevented by the hollow wire.

The nipple may be cylindrical, but is preferably a substantially spheroidal body in which the portion contacting the wire rod attachment device is arcuate. The nipple having such a shape can smoothly change the angle with respect to the wire rod attachment device, and can easily tighten the wire rod to the nipple. That is, when inserting the hollow wire and the wire to a predetermined position of the nipple and tightening with a crimping tool, the hollow wire usually has a higher Young's modulus than the nipple, so that the yield value is also high and the hollow wire part The tightening stress is biased and the tightening force between the nipple and the wire is likely to be insufficient. Therefore, if at least a part of the hollow wire rod is inserted into an arc shape, the distribution of the tightening force applied to the hollow wire rod is reduced accordingly, and it is possible to avoid insufficient direct fastening (caulking) of the nipple and the wire rod. . In this sense, the shell-shaped nipple shape shown in FIGS. 1 and 2 is particularly preferable.

[0006]

Embodiments of the present invention will be described with reference to the drawings. FIG. 3 is a front view showing an outline of the cutting state of the semi-plastic material (10) by the wire rod (30). With respect to the semi-plastic material (10) placed on the cutter bed (23), the wire rod attaching device (20) and the upper wire rod attaching portion (22)
The semi-plastic material (10) is cut in the vertical direction by relatively moving the wire rod (30) made of a piano wire stretched between and. In this example, the semi-plastic material (10) is cut in the vertical direction, but the cutting direction can be appropriately changed in design.

FIG. 1 is a front cross-sectional view of the wire end gripping structure of the present invention shown in comparison with the conventional example of FIG.
FIG. 4 is an exploded view for explaining the configuration of this grip structure. The nipple (60) is made of SS (mild steel), has a shell shape with a diameter of about 5 mm on one side, and has a hole penetrating the center thereof. The thickness of the through hole changes in the middle, and a large diameter portion (61a) of the nipple hole having a diameter of about 1.5 mm.
And a nipple hole small diameter portion (61b) having a diameter of about 0.8 mm. An insertion guide port (63) having a substantially conical surface is provided at the entrance of the large diameter portion (61a) of the nipple hole on the tip end side of the shell shape so that the hollow wire (40) can be easily inserted.

The hollow wire rod (40) is inserted into the large diameter portion (61a) of the nipple hole through the insertion guide port (63).
The hollow wire (40) is made of stainless steel such as SUS304 and has a diameter of about 1.45 mm and a length of about 20 mm.
It has a circular tubular shape with a through hole having a diameter of about 0.75 mm. Regarding the length of the hollow wire rod (40), it is necessary that the tip portion (42) of the hollow wire rod (40) protrudes from the wire rod attaching device (20), and it is preferable that the hollow wire rod (40) protrudes from the wire rod attaching port (21) by 5 to 20 mm. . Thereby, when the wire rod (30) is inclined, instead of the wire rod (30), the hollow wire rod (4)
Since 0) hits the attachment device (20), local bending stress that may be applied to the wire rod (30) can be avoided, and wear and breakage can be prevented.

In this way, the wire rod (30) such as a piano wire having a diameter of about 0.7 mm is inserted through the nipple (60) into which the hollow wire rod (40) is inserted. Then, the end of the wire rod (30) protruding from the small diameter portion (61b) of the nipple is flattened so as not to fall off the nipple (60), and the nipple (60) is pressed, The wire rod (30) and the hollow wire rod (40) form a nipple (6
0) is integrated. Here, the wire rod (30) is pressure-bonded to the nipple (60) via the hollow wire rod (40) at the large diameter portion (61a) of the nipple hole, but directly at the small diameter portion (61b) of the nipple hole. Since the wire rod (30) is fixed to the nipple (60) by crimping, the bonding strength of the wire rod (30) to the nipple (60) is increased. Regarding the relationship between the materials of the wire rod (30), the hollow wire rod (40) and the nipple (60), the Young's modulus and the strength are as follows: wire rod (30)> hollow wire rod (40)> nipple (6)
It is preferable to select in order of 0). In particular, by making the relationship of the hollow wire (40)> the nipple (60), the bending of the wire (30) can be prevented.
It can be effectively prevented by 0).

The shape of the nipple (60) may be cylindrical, but it is preferably a substantially spheroidal body in which the portion in contact with the wire rod attachment device (20) is arcuate. The nipple (60) having such a shape is used when cutting the semi-plastic material (10).
The angle with respect to the wire rod attachment device (20) can be smoothly changed, and the wire rod (30) can be easily tightened in the nipple (60). Hollow wire (40) and wire (3
0) is inserted to the predetermined position of the nipple (60), and when crimping and tightening with a crimping tool, usually the nipple (60)
Since the hollow wire (40) has a higher Young's modulus,
The yield value also becomes high, and the tightening stress is concentrated on the hollow wire (40) portion, and the tightening force between the nipple (60) and the wire (30) tends to be insufficient. Therefore, hollow wire (40)
If at least a part of the wire is inserted into an arc shape, the distribution of the tightening force applied to the hollow wire rod (40) is reduced accordingly, so that the direct fastening (caulking) of the nipple (60) and the wire rod (30) is insufficient. You can avoid becoming. Therefore, it is preferable to make the nipple (60) into the bullet shape shown in FIGS. 1 and 2 because the connection between the wire (30) and the nipple (60) becomes particularly strong. The configuration of the present invention can be appropriately changed in design without departing from the gist of the present invention.

[0011]

The wire end holding structure of the present invention has the following effects because it has the above-described structure. That is,
When cutting a semi-plastic material with a wire rod, even if a thin wire rod is used, the wire rod is covered with a hollow wire rod, so local bending stress that can be applied to the wire rod can be avoided, and wear and breakage are prevented. As a result, it is possible to produce a semi-plastic material having a long cut surface and a smooth cut surface. Further, the diameter of the through-hole provided in the nipple is changed to a two-step type, the wire material is directly crimped to the nipple at the small diameter portion, and the wire material is indirectly crimped to the nipple at the large diameter portion via the hollow wire material. Therefore, there is an effect that the wire rod and the hollow wire rod are effectively pressed against the nipple. Here, if the shape of the nipple is a spheroid such as a cannonball shape in which the portion contacting the wire rod attachment device is arcuate, the angle change with respect to the wire rod attachment device becomes smooth and the wire rod is easily tightened in the nipple. Become.

[Brief description of drawings]

FIG. 1 is a front sectional view of an end gripping structure for a wire according to the present invention.

FIG. 2 is an exploded view of the wire end gripping structure of the present invention.

FIG. 3 is a front view showing an outline of a cutting state of a semi-plastic material.

FIG. 4 is a front sectional view of a conventional wire rod end gripping structure.

5 is a perspective view of FIG.

[Explanation of symbols]

 10 semi-plastic 20 wire rod mounting device 21 wire rod mounting port 22 upper wire rod mounting portion 23 cutter bed 30 wire rod 31 flat end of wire rod 40 hollow wire rod 41 hollow wire rod hole 42 hollow wire rod tip 50 spherical nipple 51 spherical nipple Hole 60 of the present invention 61a nipple hole large diameter portion 61b nipple hole small diameter portion 62 arcuate portion 63 insertion guide port

Claims (2)

[Claims] 1. In a wire rod end gripping structure for cutting a semi-plastic material, a nipple having a through hole whose diameter is enlarged from the middle, and one end is inserted into the enlarged diameter portion,
The other end is provided with a hollow wire rod protruding from the wire rod attaching device, the wire rod is inserted into the through hole through the hollow wire rod, the protruding portion is hooked on the nipple, and the wire rod is directly connected to the nipple at a portion having a small diameter. An end-holding structure for a wire rod, which is crimped and is crimped to a nipple through a hollow wire rod at a portion having a large diameter. 2. The wire rod end gripping structure according to claim 1, wherein the nipple is a substantially spheroidal body in which a portion in contact with the wire rod attachment device is arcuate.