KR101782323B1 - Manufacturing process of wire rope assembly for vehicle safety belt - Google Patents

Abstract

A manufacturing process of a wire rope assembly for a vehicle safety belt is disclosed. According to an aspect of the present invention, there is provided a wire rope cutting method for cutting a wire rope provided as a raw material into a predetermined length; A first fixing step of bending the cut wire rope to form a loop and fixing both ends of the wire rope to the pressing and fixing part of the bracket; A second fixing step of press-molding the first recessed portion and the second recessed portion on the upper surface and the lower surface of the squeeze fixing portion to fix the wire rope to the squeeze fixing portion; And a tensile testing step of determining whether the crimp fixing portion is properly pulled by pulling the wire rope against the bracket with a predetermined tensile load, wherein the wire rope cutting step comprises: Clamping with a clamper and clamping the rear end of the cutting position with a second clamper; Melting and cutting the cut position by heating; And the second clamper is relatively moved in a direction in which the second clamper is spaced apart from the first clamper in parallel with the heating and melting of the cut position and the second clamper is relatively rotated in the twisting direction of the wire rope with respect to the first clamper The method comprising the steps of: providing a wire rope assembly for a vehicle safety belt;

Description

TECHNICAL FIELD [0001] The present invention relates to a manufacturing process of a wire rope assembly for a vehicle safety belt,

The present invention relates to a manufacturing process of a wire rope assembly, and more particularly to a manufacturing process of a wire rope assembly for a vehicle safety belt for manufacturing a wire rope assembly for mounting a buckle of a vehicle seat belt to a vehicle body.

Generally, the vehicle is provided with a safety belt as a safety measure for protecting the occupant. The seat belt is composed of a webbing made of a fiber material, a retractor controlling the insertion and removal of the webbing, and a tongue provided on the webbing is coupled to a buckle fixed to the vehicle body. Since the quality and performance of the seat belt are directly related to the safety of the passenger, the manufacturing process of the related parts is also strictly controlled.

Wire rope assemblies are known as one of the seat belt related components. The wire rope assembly is for firmly fixing the buckle, which is one of the components of the seat belt, to the vehicle body, and is constituted by a bracket fixed to the vehicle body and a wire provided on the bracket. Various types of wire rope assemblies are available depending on the structure of the vehicle body or the buckle. In general, wire rope assemblies are widely used in which both ends of a wire rope having a loop are pressed and fixed to a bracket.

The wire rope assembly as described above may securely fasten the buckle of the seat belt to the vehicle body, which may significantly affect the performance of the seat belt. For example, when the wire rope fastened to the buckle is broken or the end portion of the wire rope pressed and fixed to the bracket is released, the seat belt can not properly perform its function. Therefore, wire rope assemblies are manufactured under strict quality control, and efforts to improve quality and performance are continuing.

Embodiments of the present invention seek to provide a manufacturing process for a wire rope assembly for a vehicle safety belt that can further improve the quality of the wire rope assembly manufactured.

According to an aspect of the present invention, there is provided a wire rope cutting method for cutting a wire rope provided as a raw material into a predetermined length; A first fixing step of bending the cut wire rope to form a loop and fixing both ends of the wire rope to the pressing and fixing part of the bracket; A second fixing step of press-molding the first recessed portion and the second recessed portion on the upper surface and the lower surface of the squeeze fixing portion to fix the wire rope to the squeeze fixing portion; And a tensile testing step of determining whether the crimp fixing portion is properly pulled by pulling the wire rope against the bracket with a predetermined tensile load, wherein the wire rope cutting step comprises: Clamping with a clamper and clamping the rear end of the cutting position with a second clamper; Melting and cutting the cut position by heating; And the second clamper is relatively moved in a direction in which the second clamper is spaced apart from the first clamper in parallel with the heating and melting of the cut position and the second clamper is relatively rotated in the twisting direction of the wire rope with respect to the first clamper The method comprising the steps of: providing a wire rope assembly for a vehicle safety belt;

According to another aspect of the present invention, there is provided a wire rope cutting method for cutting a wire rope provided as a raw material to a predetermined length; A first fixing step of bending the cut wire rope to form a loop and fixing both ends of the wire rope to the pressing and fixing part of the bracket; A second fixing step of press-molding the first recessed portion and the second recessed portion on the upper surface and the lower surface of the squeeze fixing portion to fix the wire rope to the squeeze fixing portion; And a tension testing step of pulling the wire rope against the bracket with a predetermined tensile load to determine whether the crimped fixing portion is properly formed, wherein the tensile testing step includes a step of inserting a jig having a spiral- Hanging step; Applying a predetermined tensile load to the loop and moving the jig; And the loop is guided to the latching groove in parallel with the movement of the jig, and the shape of the latching groove causes the wire rope to be twisted with respect to the bracket about the longitudinal axis to a predetermined degree, And a step of correcting the tilting of the rope, wherein a manufacturing process of a wire rope assembly for a vehicle safety belt can be provided.

The manufacturing process of the wire rope assembly for a vehicle safety belt according to the embodiments of the present invention prevents the wire rope from being loosened in the cut wire rope in manufacturing the wire rope assembly, The quality of the wire rope assembly can be further improved, and furthermore, the reliability of the parts related to the seat belt can be improved, contributing to the improvement of the safety performance of the vehicle.

Further, in the manufacturing process of the wire rope assembly for a vehicle safety belt according to the embodiments of the present invention, the diameter of the cut surface is reduced through the unique wire rope cutting method, while the widening of the loop portion is prevented through the heat shrinking tube Thereby contributing to improving the assemblability of the wire rope assembly in a subsequent process.

Further, the manufacturing process of the wire rope assembly for a vehicle safety belt according to the embodiments of the present invention is advantageous in that the above-described effect can be achieved while maintaining a considerable part of the conventional process and advantageous in that it does not hinder work efficiency or productivity . In other words, in the manufacturing process according to the embodiments of the present invention, the wire rope can be prevented from being loosened and the cutting surface can be reduced in parallel with cutting of the wire rope, and the tilting correction can also be performed in the tensile test. Accordingly, the manufacturing process according to the embodiments of the present invention has an advantage that the work efficiency and productivity can be maintained at a level equal to or higher than the conventional level while improving the quality and reliability of the manufactured wire rope assembly.

1 is a schematic view showing an example of a wire rope assembly.
2 is a schematic flow diagram of a manufacturing process according to an embodiment of the present invention.
Fig. 3 is a schematic view showing the wire rope cutting step shown in Fig. 2. Fig.
FIG. 4 is a schematic view showing the primary fixing step and the secondary fixing step shown in FIG. 2. FIG.
5 is a schematic view showing the tensile test step shown in Fig. 2 of Fig. 5; Fig.
FIG. 6 is a schematic diagram showing the tilting correction step shown in FIG. 2. FIG.
FIG. 7 is a schematic view showing the tube mounting step shown in FIG. 2. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. It is to be understood, however, that the following examples are provided to facilitate understanding of the present invention, and the scope of the present invention is not limited to the following examples. In addition, the following embodiments are provided to explain the present invention more fully to those skilled in the art. Those skilled in the art will appreciate that those skilled in the art, Will be omitted.

1 is a schematic view showing an example of a wire rope assembly 10. Fig.

Referring to FIG. 1, the manufacturing process of the present invention, which will be described below, can be applied to the fabrication of the wire rope assembly 10. Figure 1 schematically illustrates an example of such a wire rope assembly 10. However, the detailed shape, dimensions and the like of the wire rope assembly 10 can be partially changed according to design matters, and are not necessarily limited to those shown in FIG.

The wire rope assembly 10 may include a wire rope 11 and a bracket 12. The wire rope 11 may have a structure in which a plurality of wire rods (steel wire) are twisted, and may have a predetermined flexibility and elasticity. The wire rope 11 is bent so as to have a loop 11a so that both ends are pressed and fixed to the bracket 12. [ The bracket 12 may be formed of a metal piece having a predetermined shape. On one side of the bracket 12, a press-fit fixing part 12a in which both ends of the wire rope 11 are fastened can be provided. The press-fit fixing portion 12a is curled so as to surround both ends of the wire rope 11 and is press-deformed by a press, thereby firmly fixing both ends of the wire rope 11.

The wire rope assembly 10 may be used as a component for fixing the buckle of the vehicle seat belt to the vehicle body. For reference, the buckle refers to a part that is combined with a tongue provided on the webbing of the seatbelt. The bracket 12 on one side of the wire rope assembly 10 is installed on the vehicle body and the loop 11a on the opposite side is assembled with the buckle so that the buckle is securely fixed to the vehicle body.

The wire rope assembly 10 can be manufactured through a process of assembling the wire rope 11 to the bracket 12. That is, when both the bracket 12 and the wire rope 11 are manufactured in the required shape or structure and are provided in the process, the both ends of the wire rope 11 are firmly fixed to the bracket 12, The wire rope assembly 10 is manufactured. It is noted that the manufacturing process of the present invention to be described below relates to the assembling process of the bracket 12 and the wire rope 11.

2 is a schematic flow diagram of a manufacturing process according to an embodiment of the present invention.

Referring to Fig. 2, the manufacturing process of this embodiment may include a wire rope cutting step S1.

The cutting step S1 may include cutting the wire rope provided as a raw material to a predetermined length required for the process. Further, the cutting step S1 may include a step of welding (melting) the cut surface of the wire rope. Preferably, the cutting step S1 may include the step of partially melting the wire rope at the cutting position to cut the wire rope. In this case, the welding (fusion) treatment of the cut surface together with the cutting of the wire rope can be performed together, and the working efficiency can be improved.

Hereinafter, the cutting step S1 will be described in more detail with reference to the drawings.

Fig. 3 is a schematic diagram showing the wire rope cutting step S1 shown in Fig. 2. Fig.

Referring to FIG. 3, the wire rope 11 provided as a raw material can be unwound from the spool 110 and transported in one direction. When the conveyed wire rope 11 reaches a predetermined position, the wire rope 11 can be clamped on both sides around the cut position. The clamper 120 at the front end of the cutting position is referred to as a first clamper 120 and the clamper 130 at the rear end of the cutting position is referred to as a second clamper 130 . According to this, the front and rear ends of the wire rope 11 can be clamped by the first and second clamper 120 and 130 around the cut position, respectively. The first and second clamper 120 and 130 may be spaced apart before and after as shown.

The wire rope 11 can be cut in a state where it is clamped by the first and second clamper 120, At this time, the wire rope 11 can be partially melted and cut at the cut position. A method of heating and melting the cutting position through a predetermined heating source may be considered, but it is preferable that current is applied to the wire rope 11 by the first and second clamper 120, A method of heating and melting can be considered. That is, current is applied to the first and second clamper 120 and 130 clamping the cutting position before and after the cutting position to partially melt and cut the cut position. This method is advantageous in that it is relatively easy to implement an automation device or the like.

More preferably, movement of the first and second clamper 120, 130, or rotation, with melting of the cutting position may be accompanied. In this embodiment, the second clamper 130 can be moved a predetermined distance in the direction away from the first clamper 120 (i.e., reverse) with melting of the cut position. At this time, movement of the second clamper 130 means relative movement with respect to the first clamper 120. That is, in this embodiment, the first clamper 120 is fixed in position and the second clamper 130 is moved backward. However, the second clamper 130 is fixed in position, and the first clamper 130 120 are moved forward, the same operation and effect can be obtained, and it is noted that the meaning of movement described in this specification includes such relative movement.

On the other hand, the backward movement of the second clamper 130 as described above allows the cutting position to more easily cut the partially routed wire rope 11, while the diameter of the cut surface is smaller than the general diameter of the wire rope 11 So that the effect of forming small size can be obtained. Here, the general diameter of the wire rope 11 means the diameter of the wire rope 11 at a portion other than the cut surface. That is, the second clamper 130 is melted and moved with respect to the first clamper 120 to apply a predetermined tensile force to the wire rope 11, so that the diameter of the cut surface at the melted cut position And is reduced to a predetermined degree. Such reduction in diameter can improve the assemblability of the wire rope 11 in a subsequent process or the like.

Also, if necessary, the second clamper 130 can be rotated with respect to the first clamper 120 together with the backward movement. At this time, it is noted that the rotation includes a relative rotation as in the case of the above-described movement. The second clamper 130 can be rotated in the twisting direction of the wire rope 11 together with melting of the cutting position. The wire rope 11 has a plurality of strands formed in a twisted structure, and rotates the second clamper 130 in such a twist direction. Also, such a rotation operation can be performed together with the movement of the second clamper 130. [ That is, in this embodiment, the second clamper 130 is separated from the first clamper 120 while being rotated in the twist direction of the wire rope 11 when heating and melting of the cut position are started.

The rotation operation as described above assists in cutting the heated and melted cutting position more easily, while reliably preventing loosening of the wire constituting the wire rope 11. That is, the wire rope 11 is rotated in the twist direction by the second clamper 130 in the process of melting and cutting the wire rope 11, so that the wire rope 11 can be prevented from being unwound from the cut surface or the like. In addition, the above-mentioned rotation operation allows the strand of the wire rope 11 to be welded (melted) at the cut surface portion while naturally retaining the original twist structure, so that burrs are generated in the vicinity of the cut surface, It is possible to prevent the lifting from being formed.

In addition, in general, in the conventional case, the wire rope 11 is cut and the cut surface is welded again in order to prevent the wire from loosening. This is because the work efficiency is poor due to a plurality of steps In addition, the condition of the welded cutting surface was poor, which often interfered with assembling in subsequent processes. In other words, the diameter of the molten cut surface may be finer than the diameter of the original wire rope 11 or a protruding portion may be generated, and since the stranded wire can not maintain the original twisted structure and is rapidly cut and welded at the cut surface portion, There is a problem that some wires are somewhat lifted in the vicinity of the cutting surface despite the welding process. The manufacturing process of this embodiment can solve the conventional problems by applying a tensile force to the wire rope 11 and rotating it in the twisting direction.

On the other hand, the wire rope 11 provided as a raw material through the cutting step S1 as described above can be cut into a piece of a predetermined length having both ends welded (melted).

Referring again to FIG. 2, the fabrication process of this embodiment may include a primary fixing step S2.

The wire rope 11 cut to a predetermined length through the cutting step S1 may be firstly fixed to the bracket 12 through the first fixing step S2. The wire rope 11 may be fixed to the wire rope 11 so that the wire rope 11 is not separated from the bracket 12 during the subsequent process, Lt; / RTI > need not be fully clamped. For the sake of operational efficiency, the complete fixing of the wire rope 11 can be accomplished through a secondary fixing step S3 described later. For example, in this primary securing step S2, the wire rope 11 may be secured to the bracket 12 at a level of approximately 50% of the tensile load of the required performance.

4 (a) is a schematic view showing the primary fixing step S2 shown in Fig. 2. Fig.

Referring to FIG. 4 (a), in the primary fixing, the crimp fixing portion 12a is curled so as to cover both ends of the wire rope 11, and the crimp fixing portion 12a is pressed So that both ends of the wire rope 11 are fixed. This is similar to conventional methods. Thereby, the wire rope 11 can be provided in a subsequent process in a form integrated with the bracket 12 (i.e., in the form of the wire rope assembly 10).

Referring again to FIG. 2, the fabrication process of this embodiment may include a second fixing step S3.

When the wire rope assembly 10 is provided through the first fixing step S2 described above, the wire rope 11 is completely fixed to the bracket 12 by secondarily compressing and deforming the crimp fixing portion 12a.

Fig. 4 (b) is a schematic view showing the secondary fixing step S3 shown in Fig.

Referring to FIG. 4 (b), the secondary fixing may be performed by press-molding the first and second recessed portions 310 and 320 on the upper and lower surfaces of the first fixed pressing and securing portion 12a, respectively. Specifically, the upper surface of the press-fit fixing portion 12a may be pressed by a press to form the first recessed portion 310. [ The first recessed portion 310 may be recessed with a predetermined depth and may be formed to extend a predetermined length in the longitudinal direction of both ends of the wire rope 11. In addition, a plurality of second recessed portions 320 may be formed in the first recessed portion 310. The second recessed portion 320 may be formed by being recessed from the first recessed portion 310 by a predetermined depth and spaced apart from the first recessed portion 310. The first and second recessed portions 310 and 320 are formed on the lower surface of the pressing and fixing unit 12a similarly to the upper surface. The second recessed portion 320 is formed on the upper surface of the second recessed portion 320, Can be formed alternately. That is, the press-fit fixing portion 12a can be formed such that the second recessed portion 320 on the upper surface and the second recessed portion 320 on the lower surface are alternately arranged along the longitudinal direction of the wire rope 11.

The first and second recessed portions 310 and 320 are for firmly fixing the wire rope 11, and such a method has been conventionally known.

Referring again to FIG. 2, the manufacturing process of the present embodiment may include a tensile testing step S4.

When the wire rope 11 is completely fixed to the bracket 12 via the secondary fixing step S3, a tension inspection step S4 for quality verification of the wire rope assembly 10 can be performed. In the tensile testing step S4, a predetermined tensile load is applied to the wire rope 11 to check whether or not the wire rope 11 is fixed to the bracket 12 properly. If necessary, the tensile inspection step S4 may be carried out to check for defects such as the wire rope 11, the bracket 12 and the like, as well as for the appearance inspection.

Fig. 5 (a) is a schematic view showing the tensile test step S4 shown in Fig. 2.

Referring to FIG. 5A, the tensile testing step S4 may be performed by fixing the wire rope assembly 10 to a predetermined position and applying a tensile force to the wire rope 11. More specifically, the bracket 12 can be mounted and fixed at a predetermined position, and the jig 410 is fastened to the loop 11a of the wire rope 11 and the wire rope 11 It can be pulled with a predetermined tensile force. The jig 410 can pull the wire rope 11 with a predetermined tensile force to check whether both ends of the wire rope 11 are separated from the crimp fixing portion 12a.

At this time, the tension inspection step S4 according to the present embodiment can perform the pulling inspection by pulling the wire rope 11 and correcting the twisted position of the wire rope 11. Preferably, such correction of the wire rope 11 can be effected by the jig 410 fastened to the loop 11a and pulling the wire rope 11. This will be further described below with reference to the drawings.

5 (b) is a schematic view showing an example of the jig 410 used in the tensile inspection step S4 and its operation.

5 (b), the wire rope 11, which is press-fitted to the bracket 12, can be twisted by a predetermined amount in the longitudinal direction as shown in the right-hand side. And the right drawing schematically shows the wire rope 11 viewed from the end of the side of the loop 11a. In other words, since the wire rope 11 is formed by a plurality of wire strands twisted, twist in the twist direction of the wire strands can be generated in the process of the both ends being inserted into the wire fixing portion 12a and being compressed. That is, the wire rope 11 is intended to be assembled in parallel with the bracket 12 as in the initial state P in the right drawing. However, in the process of fixing the both ends to the bracket 12, As shown in FIG. For convenience, the twist or rotation of the wire rope 11 will be referred to as tilting. According to this, the wire rope 11 is tilted in one direction in the process of fixing the wire rope 11 to the bracket 12 according to the twist direction of the strand.

The tilting of the wire rope 11 as described above may affect the assemblability of the wire rope assembly 10 in a subsequent process and may further affect the bonding strength to the connection portion with the buckle. The manufacturing process of the present embodiment can further improve the quality of the wire rope assembly 10 by correcting the tilting of the wire rope 11 generated in the assembling process.

However, if a new process is added to compensate for the tilted wire rope 11, it may negatively affect work efficiency and productivity. Thus, in the manufacturing process of this embodiment, (11) with a tensile force test. This can be realized in particular by a simple jig 410 as shown on the left in Fig. 5 (b).

The jig 410 may be formed in the form of a column or a projection having a predetermined height so as to be engaged with the loop 11a of the wire rope 11. In the case of this embodiment, the outer shape of the jig 410 is illustrated as a substantially circular columnar shape. However, the outer shape of the jig 410 is not limited to the illustrated form, as long as the loop 11a can be properly engaged and attached to the wire rope 11 in tension.

The jig 410 may have a helical groove 411. The engaging groove 411 may extend along the outer surface of the jig 410 and may be recessed to a predetermined depth. The wire rope 11 engaged with the jig 410 can be positioned and guided in the engaging groove 411. [ Since the wire rope 11 is pulled by pulling the wire rope 11 after the wire rope 11 is fastened, the wire rope 11 is pulled by the jig 410 (See FIG. 4).

The latching groove 411 may be formed in a spiral shape. That is, the latching groove 411 may be extended in a spiral shape along the outer surface of the jig 410. The helical engagement groove 411 rotates the wire rope 11 in a direction opposite to the tilted direction by a predetermined amount. The wire rope 11 can be extended in a spiral shape in the opposite direction in which the wire rope 11 is tilted so that the wire rope 11 is seated in the engaging groove 411, The wire rope 11 is twisted by a predetermined degree in the opposite direction in which the wire rope 11 is tilted by the shape of the helical groove 411. [ By thus rotating or twisting the wire rope 11 to a predetermined degree in the opposite direction in which the wire rope 11 is tilted, the tilting of the wire rope 11 generated in the assembling process can be corrected.

Particularly, the tilting correction of the wire rope 11 as described above is naturally performed by the engagement grooves 411 of the jig 410 in the process of pulling the wire rope 11 and performing the tensile test. Accordingly, although the process of tilting correction is added, the efficiency and productivity of the work can be kept the same as before, and the tilting of the wire rope 11 is corrected, so that the quality of the completed wire rope assembly 10 can be improved.

Referring again to FIG. 2, the manufacturing process of this embodiment may include a tilting correction step (S5) if necessary.

The tilting of the wire rope 11 can be corrected through the shape of the engagement groove 411 of the jig 410 in the above-described tensile inspection step S4, but if the tilting of the wire rope 11 is excessively generated The tilting of the wire rope 11 can be corrected again through the tilting correction step S5. However, since the new step is added to the step of stopping the tilting, the tilting correction step S5 can not sufficiently perform the tilting deformation according to the thickness of the wire rope 11, Is preferably performed selectively.

FIG. 6 is a schematic diagram showing a tilting correction step (S5) shown in FIG. 2. FIG.

Referring to FIG. 6, the tilting correction step S5 may be performed by a third clamper 510 clamping the loop 11a of the wire rope 11 up and down. The third clamper 510 clamps the portion of the loop 11a upward and downward and then rotates the wire rope 11 in the longitudinal direction opposite to the tilted direction of the axis T to correct the tilting of the wire rope 11 can do. Such a process can be relatively easily implemented through an automation device.

Referring again to FIG. 2, if necessary, the manufacturing process of this embodiment may include a tube installation step (S6).

When the wire rope 11 is pressed and fixed to the bracket 12 through the above-described processes and the tensile test is completed, the wire rope 11 can be covered with a tube as needed. This is for the purpose of solving the problem that the loops 11a are widened by the elasticity of the wire rope 11 to lower the assembling property. Preferably, the tube may include a heat shrinkable tube. Since the method using the heat-shrinkable tube is known in the art, only a rough process and a method of the tube installation step (S6) will be briefly described below with reference to the drawings.

7 is a schematic view showing a tube installation step (S6) shown in Fig.

7 (a), when the wire rope assembly 10 is provided with the main tube installation step S6, the fourth clamper 610 disposed to the left and right of the wire rope 11 is connected to the roof 11a ) Area to left and right. As a result, the portion of the loop 11a opened due to the elasticity of the wire rope 11 becomes small in the right and left widths to an appropriate extent.

Next, a heat-shrinkable tube 620 may be provided and covered with the wire rope 11 as shown in Fig. 7 (b). Since the loop 11a is clamped by the fourth clamper 610, it is preferable that the heat shrinkable tube 620 is inserted through the bracket 12 side. In addition, the heat shrink tube 620 may have a sufficient lateral width so that the bracket 12 and the wire rope 11 can be easily inserted.

When the heat-shrinkable tube 620 is covered, the heat-shrinkable tube 620 can be heated and shrunk as shown in FIG. 7 (c). When the heat shrinkable tube 620 is contracted, the elasticity of the loop 11a portion can be supported by the heat shrinkable tube 620, and even after the fourth clamper 610 is removed, .

As described above, in the manufacturing process according to the present embodiment, in manufacturing the wire rope assembly 10, it is possible to prevent the wire rope 11 from being loosened from the cut wire rope 11, The quality of the wire rope assembly 10 can be further improved and the reliability of the parts related to the seat belt can be improved to contribute to the improvement of the safety performance of the vehicle. In addition, the manufacturing process of the present embodiment can reduce the diameter of the cut surface through the unique cutting method of the wire rope 11, prevent the widening of the loop 11a through the heat shrink tube, It is possible to contribute to improving the assemblability of the base 10. Particularly, the effect of the present embodiment as described above can be achieved in a state in which a conventional process is largely maintained, and there is an advantage that it does not hinder work efficiency and productivity. In the manufacturing process of the present embodiment, it is possible to prevent the wire rope 11 from being loosened and to reduce the cutting surface in parallel with the cutting of the wire rope 11, and the tilting correction can also be performed in parallel with the tensile test. Thus, the fabrication process of the present embodiment has the advantage of improving the quality and reliability of the manufactured wire rope assembly 10, while maintaining work efficiency and productivity at or above conventional levels.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, many modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

10: wire rope assembly 11: wire rope
11a: Loop 12: Bracket
12a:
S1: Wire rope cutting step S2: Primary fixing step
S3: Secondary fixing step S4: Tensile testing step
S5: Tilting correction step S6: Tube mounting step

Claims (5)

A wire rope cutting step S1 for cutting the wire rope 11 provided as a raw material to a predetermined length;
A primary fixing step S2 of bending the cut wire rope 11 to form a loop 11a and fixing both ends of the wire rope 11 to the press fitting portion 12a of the bracket 12;
The first recessed portion 310 and the second recessed portion 320 are press-formed on the upper and lower surfaces of the squeeze fixing portion 12a to fix the wire rope 11 to the squeeze fixing portion 12a (S3); And
(S4) of pulling the wire rope (11) with respect to the bracket (12) at a predetermined tensile load to determine whether the crimped fixing portion (12a) is properly formed,
The wire rope cutting step (S1)
Clamping the front end of the cutting position of the wire rope (11) with the first clamper (120) and clamping the rear end of the cutting position with the second clamper (130);
Melting and cutting the cut position by heating; And
The second clamper 130 is relatively moved in a direction away from the first clamper 120 and the second clamper 130 is moved relative to the first clamper 120 in parallel with the heating and melting at the cut position, Relative to the wire rope (11) in a twist direction of the wire rope (11). A wire rope cutting step S1 for cutting the wire rope 11 provided as a raw material to a predetermined length;
A primary fixing step S2 of bending the cut wire rope 11 to form a loop 11a and fixing both ends of the wire rope 11 to the press fitting portion 12a of the bracket 12;
The first recessed portion 310 and the second recessed portion 320 are press-formed on the upper and lower surfaces of the squeeze fixing portion 12a to fix the wire rope 11 to the squeeze fixing portion 12a (S3); And
(S4) of pulling the wire rope (11) with respect to the bracket (12) at a predetermined tensile load to determine whether the crimped fixing portion (12a) is properly formed,
The tensile testing step (S4)
Placing a jig 410 having a helical engagement groove 411 formed in the loop 11a;
Applying a predetermined tension load to the loop (11a) while the jig (410) is moved; And
The loop 11a is guided into the latching groove 411 and the wire rope 11 is moved in the longitudinal direction to the axial direction by the shape of the latching groove 411. [ T to a predetermined degree relative to said bracket (12) to compensate for tilting of said wire rope (11) generated during the process. The method according to claim 1 or 2,
In the secondary fixing step S3,
The first recessed portion 310 is formed to extend a predetermined length along the longitudinal direction of the squeeze fixing portion 12a and a plurality of the second recessed portions 320 are formed on the first recessed portion 310 , And the second recessed portion (320) are alternately formed on the upper surface and the lower surface of the squeeze fixing portion (12a). The method according to claim 1 or 2,
The wire rope 11 is clamped up and down through the third clamper 510 and the wire rope 11 is moved in the longitudinal direction about the axis T with respect to the bracket 12. [ (S5) for correcting the tilting of the wire rope (11) generated during the process by rotating the wire rope (11) by a predetermined amount. The method according to claim 1 or 2,
And a tube installation step (S6) of covering the wire rope (11) with a heat shrink tube (620) after the tension inspection step (S4)
The tube installation step (S6)
Pressing the loop 11a portion from the left and right through the fourth clamper 610;
Covering the wire rope (11) with the heat shrink tube (620) so that the wire rope (11) is inserted into the heat shrink tube (620); And
Shrinking the heat shrinkable tube 620 and causing the elasticity of the loop 11a pressed by the fourth clamper 610 to be supported by the heat shrinkable tube 620. [ Manufacturing process of a wire rope assembly for a seat belt.

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