WO2013094876A1

WO2013094876A1 - Jig for producing vehicle wiper tension springs

Info

Publication number: WO2013094876A1
Application number: PCT/KR2012/009350
Authority: WO
Inventors: 유병갑
Original assignee: Yu Byeng-Gab
Priority date: 2011-12-23
Filing date: 2012-11-08
Publication date: 2013-06-27
Also published as: KR101153261B1

Abstract

The present invention relates to a jig for producing vehicle wiper tension springs. The jig for producing vehicle wiper tension springs is adapted for the heat treatment of a plurality of tension springs, in a joined together state, by inserting same into a heating furnace so as to form a predetermined curvature in the tension springs. The jig comprises: a plate; a plurality of side curvature forming pins; and central curvature forming pins wherein circular first and second centre forming pins are constituted in a horizontal position, and the first and second centre forming pins and the tension springs are formed in face to face contact over a predetermined surface area. The level of perfection of the product can be enhanced as it is possible to carry out a process of forming a gentle central curvature in the tension spring because the central curvature forming pins are horizontally disposed in two places such that a wiper strip, which is pressed by means of the tension spring, can make close contact smoothly against a vehicle glass surface and at the same time the wiper strip can be pressed with more than a predetermined strength.

Description

Jig for making tension spring of vehicle wiper

The present invention relates to a jig for manufacturing a tension spring of a vehicle wiper, and more particularly, the wiper strip pressurized by the tension spring is in close contact with the vehicle glass surface and at the same time pressurizes the wiper strip beyond a certain strength. The two curvature forming pins can be arranged horizontally so that the center curvature of the tension spring can be smoothly formed to increase the completeness of the product, and the curvature at the center of the tension spring can be formed smoothly. It is designed to pressurize the tension spring smoothly after joining with the bracket cover, even if there is no coupling member, so that the shaking phenomenon does not occur at both ends of the wiper strip to be combined with the tension spring. Heat source is distributed evenly over a number of tension springs during the process It is possible to produce high quality tension springs in the same way, and when the plate is laminated by a plurality of plate bodies formed by stacking pins which protrude more than the edge side curvature forming pins and the center curvature forming pins, the plate and side curvature forming pins and the center curvature are formed. The deformation of the pin can be prevented, and in particular, the plate body is formed by dividing the first and second plate bodies, and this also prevents deformation of the plate body, and adopts the wire cutting processing method for all the components to be processed on the plate body. The present invention relates to a jig for manufacturing a tension spring of a vehicle wiper that can minimize a failure rate of a tension spring according to deformation of a plate body.

In general, the vehicle wiper is connected to the arm (not shown in the figure) of the vehicle is configured to remove foreign matter (rain, snow, dust, etc.) on the glass surface by the left, right turning operation.

1 illustrates a general vehicle wiper 100, which includes a bracket cover 150 connected to an arm of a vehicle, a tension spring 120 coupled to the bracket cover 150, and an elastic force of the tension spring 120. As a result, a wiper strip 110 made of a rubber material for contacting the glass surface of the vehicle to remove foreign substances is formed.

In addition, the spoiler 130 and the end cap 140 may be configured respectively.

In addition, Figure 2 also shows a general vehicle wiper 200, the bracket cover 240, the tension spring 220, the wiper strip 210 are sequentially coupled, the bracket cover 240 and the tension spring 220 It is configured to further comprise a separate coupling member 230.

On the other hand, the main purpose of the vehicle wiper of the above configuration is to remove the foreign matter on the glass surface of the vehicle.

In order to achieve this purpose, it is obvious that the wiper strip and the vehicle glass surface should be in close contact with each other, and in particular, the foreign matter on the vehicle glass surface can be smoothly removed only when a pressing force of a certain strength is applied to the wiper strip by the elastic force of the tension spring. Will be.

3 to 4, the conventional tension spring TS receives a pressing force by a bracket cover coupled to the tension spring TS in a state in which a constant curvature is formed, and transmits a force to the wiper strip. It consists of a system.

That is, to transmit the adhesion and the force of the wiper strip and the vehicle glass surface is the elastic force due to the curvature formed in the tension spring (TS).

FIG. 5 relates to a jig for manufacturing a tension spring of a vehicle wiper according to the related art, and forms a plurality of side curvature forming pins 320 and a central curvature to support a tension spring TS inside the plate 310 to form a curvature. Pin 330 is configured.

Here, the side curvature forming pin 320 and the center curvature forming pin 330 may further extend in the longitudinal direction of the tension spring (TS) according to the length of the tension spring (TS), to form a plurality, if necessary The plurality can be configured in the up and down directions.

The tension spring manufacturing jig 300 of the vehicle wiper has a tension spring TS disposed on the side curvature forming pin 320 and the central curvature forming pin 330 to be inserted into a heating furnace to form a constant curvature through heat treatment. Configured to do so.

FIG. 6 relates to a jig for manufacturing a tension spring of a vehicle wiper according to the related art.

The tension spring fabrication jig 400 of the vehicle wiper is composed of a plate body 410 and is uniform with the first jig 412 including a first processing surface 413 having a predetermined curvature on the plate body 410. The second jig 416 including the second machining surface 417 having the curvature is formed.

Here, the first jig 412 is in a fixed state, the second jig 416 is configured to be movable by the press means 418, in particular, the first, second processing surface (413, 417) The same curvature is formed.

The tension spring fabrication jig 400 for a vehicle wiper according to the related art has a structure of a tension spring fabrication jig 400 for a vehicle wiper after processing the tension spring TS using a separate processing device. It arrange | positions between the 1st, 2nd jig 412,416.

After that, the pressurizing means 418 is inserted into the heat treatment furnace, and the tension spring TS is manufactured through the heat treatment process.

On the other hand, Figures 7 to 8 relates to a jig for manufacturing a tension spring of another conventional vehicle wiper (Patent 10-1058265).

The tension spring fabrication jig 500 of the conventional vehicle wiper is provided with a plate body 510, and the plate body 510 includes a plurality of side curvature forming pins 520 and a plurality of central curvature forming pins 530. Consists of.

In particular, the center curvature forming pin 530 is configured in a half moon shape is configured to be able to gently produce the center curvature of the tension spring (TS).

In addition, the side curvature forming pin 520 and the center curvature forming pin 530 is configured to move up, down in a sliding manner is configured to be able to set the curvature of the tension spring (TS).

The above-described jig for manufacturing a tension spring of a vehicle wiper has the following problems.

First, the tension spring manufacturing jig 300 of the conventional vehicle wiper illustrated in FIG. 5 includes one central curvature forming pin 330 that forms a curvature at the center of the tension spring TS, and thus, a tension spring TS. There is a problem that the radius of curvature of the central portion becomes smaller.

That is, when the heat treatment for forming the curvature on the tension spring (TS) through the tension spring manufacturing jig 300 of the vehicle wiper, the center of the tension spring (TS) along the surface of the center curvature forming pin 330 The curvature is formed so that the curvature of the center portion of the tension spring TS is inclined steeply, that is, the heat treatment is performed in a state in which the curvature radius is reduced.

In particular, since the curvature of the central portion of the tension spring TS is composed of very short sections, when the normal vehicle wiper 100 as shown in FIG. 1 is used, the force due to the elastic force is applied to the central portion of the tension spring TS. As a result, the pressing force of the center portion of the wiper strip is lowered, so that the wiper strip portion (center portion of the wiper strip) facing the arm when the foreign matter is removed from the glass surface of the vehicle is inferior to the vehicle glass surface. There was a problem that can not be removed smoothly.

In addition, even if contact with the glass surface of the vehicle, because the curvature of the center portion of the tension spring (TS) is made of a small state because the pressing force is not transmitted, this also causes a problem that does not properly remove the foreign matter on the glass surface of the vehicle do.

In order to solve such a problem, there is a case in which the center of the tension spring TS is used as a straight section through the coupling member 230 using the vehicle wiper 200 as shown in FIG. 2.

However, in the case of using the vehicle wiper 200 as described above, although the curvature of the center portion of the tension spring TS may be partially compensated as shown in FIG. 10, both ends of the vehicle wiper 200 are connected to the center of the tension spring TS. The curvature is deformed, which causes both ends of the wiper strip to contact the glass surface of the vehicle and the inability to apply a certain strength force, which causes vibration (chattering) at both ends of the wiper strip. It was.

In addition, the tension spring fabrication jig 300 of the vehicle wiper having a plurality of tension springs TS disposed therein is laminated and inserted into a heating furnace to perform heat treatment. In this case, the vehicle having the above structure Since the spring fabrication jig 300 of the wiper is configured to stack the plate body 310 on the side curvature forming pin 320 and the center curvature forming pin 330, the tension spring for the vehicle wiper formed in the lower portion The side curvature forming pin 320 and the center curvature forming pin 330 of the jig 300 is deformed to cause a problem that the curvature of the tension spring (TS) can not be accurately formed.

Next, the tension spring fabrication jig 400 of the conventional vehicle wiper illustrated in FIG. 6 adopts a method in which a tension spring TS is mounted in a state in which a curvature is arbitrarily processed through a separate processing device to perform heat treatment. Therefore, it is difficult to form a curvature desired by the user.

In particular, since the second jig 416 adopts a method of performing heat treatment while pressing through the press means 418 in a non-fixed state, there is a problem that the curvature and elastic force of the tension spring TS are not uniformly formed. .

That is, when the pressure of the press means 418 acts together with the heat treatment, no matter how much curvature is formed on the first and

second machining surfaces

413 and 417 of the first and

second jigs

412 and 416, 2 The tension spring TS is not formed in the shape of the curvature of the two

machining surfaces

413 and 417, but the processing is performed in such a manner that the radius of curvature becomes smaller.

The wiper for the vehicle including the tension spring TS thus manufactured has a smaller curvature radius, so that the wiper strip of the vehicle wiper needs to have high pressure to be in close contact with the glass surface of the vehicle. The friction coefficient between the glass surface of the vehicle and the vehicle is high, which causes the problem of premature failure of the wiper strip and the vehicle wiper.

In addition, since the curvature of the central portion of the tension spring (TS) is also reduced, there is a problem that the central portion of the wiper strip does not properly remove foreign substances attached to the vehicle glass surface as described above.

On the other hand, the tension spring manufacturing jig 500 of the conventional vehicle wiper shown in Figures 7 to 8 is composed of a configuration for solving the problems of the form described above.

That is, by forming the central spring curvature forming pin 530 that forms the curvature of the center portion in the form of a semi-circle, the tension spring TS is configured to smoothly form the curvature of the center of the tension spring TS by the two-contact method It is.

However, the tension spring fabrication jig 500 of the vehicle wiper having the structure as described above has a problem in that the central curvature forming pin 530 is rotated in a plurality of heat treatment processes and the operator must set it again.

That is, it is common to couple the side curvature forming pins 520 and the central curvature forming pins 530 to the plate body 510 by fit.

Since most of the tension spring fabrication jig 500 of the vehicle wiper is a device for heat-treating the tension spring TS by heating to a high temperature, it is used in combination using a plate and a pin made to withstand high temperatures. It is common to do

This is because it is too expensive in terms of cost when the jig 500 for manufacturing the tension spring of the vehicle wiper is separately heat treated.

In particular, the shape of the central curvature forming pin 530 is made of a half-moon shape, but when the first tension spring (TS) is placed, no problem occurs, but the central curvature forming pin 530 is inserted into a heating furnace during heat treatment. The tension spring TS is bent (a phenomenon in which the radius of curvature decreases sharply) at the corner portion where the straight section and the curve section meet each other, resulting in the failure of some tension spring TS.

In addition, the jig 500 for manufacturing the tension spring of the vehicle wiper in FIGS. 7 to 8 has a structure capable of sliding up and down the side curvature forming pins 520 and the central curvature forming pins 530. This structure can be completed by forming a hole in the plate body 510, because the heat treatment is carried out after laminating (usually 10 stages) of the jig 500 for manufacturing the tension spring of a plurality of vehicle wipers in the heat treatment process The phenomenon in which deformation of 500 occurred frequently occurred.

This problem is similar to the phenomenon occurring in the tension spring fabrication jig of the vehicle wiper of FIGS. 5 to 6, in particular, a problem that is more prominent in the tension spring fabrication jig of the vehicle wiper having the structure of FIGS. 7 to 8. It was.

In addition, the above-described tension spring fabrication jig of the three types of vehicle wipers are subjected to a heat treatment process by stacking a plurality as described above, at this time, the circulation of the heat source smoothly between the tension spring fabrication jig of each vehicle wiper. It has also been pointed out that a problem arises in that a difference in product performance occurs due to an excessive supply of heat in some cases and a poor supply of heat sources in others.

Jig for manufacturing the tension spring of the vehicle wiper of the present invention for solving the above problems is inserted into the heating furnace in a state in which a plurality of tension springs are combined for manufacturing the tension spring of the vehicle wiper for heat treatment to form a constant curvature in the tension spring A jig, comprising: a plate body; A plurality of side curvature forming pins coupled to the plate to form curvature of the tension spring side; A central curvature forming pin coupled to the plate and forming a curvature at the center of the tension spring; wherein the central curvature forming pin is formed at two locations in a horizontal position such that the curvature at the center of the tension spring is largely formed. do.

In the present invention, the plate body is characterized in that the air circulation is formed so that the heat is evenly circulated during the heat treatment process, the heat source is evenly transmitted to the plurality of tension springs.

In the present invention, the plate body to which the side curvature forming pin and the center curvature forming pin are coupled is composed of first and second plate bodies so as not to bend, and the first and second plate bodies are coupled to each other by using a coupling pin. It is characterized by.

In the present invention, the side curvature forming pins and the central curvature forming pins coupled to the plate body formed of the first and second plate bodies are coupled to each other through interference fitting after forming the curvature forming pin coupling holes in the first plate body.

In the present invention, a plurality of lamination pins are formed at the edges of the plate, and the lamination pins are formed higher than the protruding heights of the side curvature forming pins and the central curvature forming pins.

According to the present invention, the center curvature of the tension spring is smoothly arranged by horizontally arranging two center curvature forming pins so that the wiper strip pressurized by the tension spring can be in close contact with the vehicle glass surface and pressurize the wiper strip to a certain strength or more. It can be processed so that it can be formed to increase the completeness of the product.

In addition, since the curvature of the center of the tension spring can be formed smoothly, even if there is no separate coupling member when the bracket cover is combined, the amount of the wiper strip that is combined with the tension spring is manufactured so that the tension spring can be smoothly pressed after the bracket cover is combined. This is to prevent the shaking from occurring at the end.

And the air circulation is formed in the plate body heat source is evenly transmitted to the plurality of tension spring during the heat treatment process to produce the same high-quality tension spring.

In addition, when a plurality of plate bodies are laminated by stacking pins protruding more than the edge side curvature forming pins and the center curvature forming pins of the plate body, deformation of the plate body, the side curvature forming pins and the center curvature forming pins can be prevented. The plate body is formed by dividing it into first and second plate bodies, which also prevents deformation of the plate body.

In addition, it is a useful invention that can minimize the failure rate of the tension spring according to the deformation of the plate by adopting a wire cutting processing method for all the components to be processed in the plate.

1 is a perspective view showing a general vehicle wiper.

2 is a perspective view showing another form of a general vehicle wiper;

Figure 3 is a side view showing the tension spring formed curvature.

4 is a state diagram showing the operating state of FIG.

Figure 5 is a plan view showing a jig for producing a tension spring of a conventional vehicle wiper.

Figure 6 is a plan view showing a jig for producing a tension spring of another conventional vehicle wiper.

Figure 7 is a perspective view showing a jig for producing a tension spring of another conventional vehicle wiper.

8 is a plan view of FIG.

Figure 9 is a side view showing the operating state of the conventional tension spring.

10 is a state diagram showing when the tension spring is coupled to the vehicle wiper formed with a coupling member.

11 is a perspective view showing a jig for manufacturing a tension spring of the vehicle wiper according to the present invention.

12 is a plan view of FIG.

13 is a perspective view showing a plate body according to the present invention.

14 is a state diagram showing a state in which the curvature of the center of the tension spring is formed by the center curvature forming pin according to the present invention.

15 is a state diagram showing a state in which the tension spring production jig of the vehicle wiper of the present invention is laminated.

* Explanation of Codes *

TS: Tension Spring

S1, S2: First and second contact points T1: First tangent T2: Second tangent

10: plate

P1: first plate P2: second plate

11 air circulation 12 coupling hole 13 coupling pin 14 curvature forming pin coupling hole

15: laminated pin 16: laminated pin coupling hole

20: side curvature forming pin

30: center curvature forming pin

31: first center portion curvature forming pin 32: second center portion curvature forming pin

50: Jig for making tension spring of vehicle wiper

Hereinafter, the configuration of the present invention with reference to the accompanying drawings in more detail.

First, as shown in FIGS. 11-13, the board body 10 is comprised.

In addition, a plurality of side curvature forming pins 20 are arranged in the left and right directions inside the plate body 10.

In addition, a plurality of central portion curvature forming pins 30 having the same shape as the side curvature forming pins 20 are formed at the center portion of the plate body 10.

Here, the center curvature forming pin 30 is composed of a structure arranged in two groups in a horizontal arrangement so as to form a gentle curvature of the center of the tension spring (TS).

In addition, the plate body 10 has a plurality of air circulation portion 11 is formed in a space where the side curvature forming pin 20 and the center curvature forming pin 30 is not formed, the side curvature forming pin 20 ) And a plurality of laminated pins 15 protruding from the central curvature forming pins 30 are formed.

In particular, the plate body 10 may be composed of first and second plate bodies P1 and P2.

At this time, it is natural that the air circulation part 11 is formed in the first and second plate bodies P1 and P2 of the plate body 10 in the same manner.

In addition, the coupling of the first and second plate bodies P1 and P2 is configured to form a coupling hole 12 in the first and second plate bodies P1 and P2 and to combine them using the coupling pins 13.

When the plate body 10 is formed of the first and second plate bodies P1 and P2 as described above, the side curvature forming pins 20 and the central curvature forming pins 30 may be coupled to the first plate body P1. It is configured to form a curvature forming pin coupling hole 14 to be coupled in an interference fit manner.

In addition, the lamination pin coupling hole 16 to combine the air circulation unit 11, the coupling hole 12, the curvature forming pin coupling hole 14 and the laminated pin 15 to be processed in the plate body 10 in the present invention All of the configuration is processed through a wire cutting method is configured to prevent deformation of the plate body (10).

Looking at the effect of the jig for producing the tension spring of the vehicle wiper of the present invention made as described above are as follows.

First, the tension spring manufacturing jig 50 of the vehicle wiper of the present invention is a device capable of clamping the tension spring TS, which is a component of the vehicle wiper, when heat-treating to form a constant curvature.

Particularly, in the present invention, the center curvature forming pins 30 are formed in two places so as to form the curvature of the center of the tension spring TS as smoothly as possible, and are disposed to be in parallel with each other.

That is, the central curvature forming pin 30 is formed to form two contacts on both sides of the center of the tension spring TS so that the curvature radius of the central portion of the tension spring TS can be large (smooth). will be.

Looking at this in detail, as shown in Figure 14 for convenience, the central curvature forming pin 30 is represented by the first central curvature forming pin 31 and the second central curvature forming pin 32, the first, second center curvature forming pin ( The upper center curvature forming pin 31 of the first center curvature forming pin 31 and the second upper curvature forming pin 32 of the second center curvature forming pin 32 are in contact with the tension spring TS.

In this case, both ends of the tension spring TS are already formed for the curvature forming by the side curvature forming pins 20, and at both ends spaced a predetermined distance from the center of the tension spring TS. Since the first and second center curvature forming pins 31 and 32 are formed, the first and second contact points are respectively located at positions outside the distance d1 of the circle center of the first and second center curvature forming pins 31 and 32, respectively. (S1, S2) is generated.

Therefore, the curvature starting from the first contact point S1 which is in contact with the first center curvature forming pin 31 of the tension spring TS and ending with the second contact point S2 which is in contact with the second center curvature forming pin 32 is It is formed in contact with the first and second tangents T1 and T2 within the distance d2 between the first and second contact points S1 and S2.

The curvature formed as described above is more gentle than the existing curvature so as to solve all the problems caused by the small radius of curvature of the center portion of the tension spring TS, which was a problem of the prior art.

On the other hand, in the present invention, as shown in Figure 15 is a device that can form a curvature by stacking the jig 50 for producing the tension spring of the vehicle wiper and put it in a heating furnace.

At this time, in the present invention, since the additional laminated pin 15 is formed to protrude more than the side curvature forming pin 20 and the center curvature forming pin 30, the side curvature forming pin 20 and the center curvature forming pin ( The lamination is performed smoothly while preventing the deformation of 30).

In addition, by forming the plate body 10 into the first and second plate bodies P1 and P2, the deformation of the plate body 10 can be prevented in advance, thereby reducing the failure of the tension spring TS due to the deformation of the plate body 10. Will be.

In particular, the laminated pin 15 and the plate 10 of the dual structure is to prevent the deformation even if the jig 50 for producing the tension spring of the vehicle wiper repeatedly.

On the other hand, the air circulation unit 11 in the present invention acts so that the heat source can evenly affect the tension spring (TS) even when inserted into the heating furnace in a state that the tension spring manufacturing jig 50 of the vehicle wiper is stacked. It works to produce a large quantity of products of uniform quality.

Although the above-described embodiments have been described with respect to the most preferred embodiments of the present invention, the present invention is not limited thereto, and the present invention can be modified in various forms without departing from the technical spirit of the present invention.

Claims

In the jig for manufacturing a tension spring of a vehicle wiper for inserting a plurality of tension springs (TS) into a heating furnace and heat-treating them to form a constant curvature in the tension spring (TS),

Plate body 10;

A plurality of side curvature forming pins 20 coupled to the plate 10 to form curvature of the tension spring TS side;

The first and second center portion forming pins 31 and 32 having a circular shape are formed in a horizontal position to couple to the plate 10 and form a curvature of the center of the tension spring TS, and form the first and second center portions. The pin 31, 32 and the tension spring (Ts) is a central curvature forming pin 30 made to be formed in the surface contact having a predetermined area; the jig for producing a tension spring of the vehicle wiper characterized in that.
The vehicle wiper of claim 1, wherein the plate body (10) has an air circulation portion (11) formed so that air circulates during heat treatment to transfer heat sources to the plurality of tension springs (TS). Jig for tension spring production.
The plate body 10 of claim 1, wherein the side curvature forming pins 20 and the central curvature forming pins 30 are coupled to each other, the plate body 10 includes first and second plate bodies P1 and P2 so as not to bend. Jig for producing a tension spring of the vehicle wiper, characterized in that the coupling hole 12 is formed in the first and second plate bodies (P1, P2) to be coupled using a coupling pin (13).
The side curvature forming pin 20 and the central curvature forming pin 30 coupled to the plate body 10 formed of the first and second plate bodies P1 and P2 have a curvature on the first plate body P1. Tension spring manufacturing jig of the vehicle wiper, characterized in that the coupling pin through the coupling forming after forming the forming hole (14).
According to claim 1, wherein a plurality of laminated pins 15 are formed at the edge of the plate body 10, the laminated pins 15 is the height of the protrusion of the side curvature forming pin 20 and the center curvature forming pin 30 Tension spring making jig for vehicle wipers characterized by being formed higher.