Connection structure for tire anti-skid device

Abstract

To provide a connection structure of a tire antislip device which can easily fix a connection member to a wire end part without increasing the number of components.SOLUTION: A connection structure 10 includes a connection member 20 having a fixed side opening 22 and an attachment / detachment side opening 30. A wire 12a disposed at the fixed side opening 22 has a head 12b, and the fixed side opening 22 comprises a head insertion part 24, a head holding part 26, and a wire insertion part 28. A side wall of the head insertion part 24 is provided with a first projection 24a which moves the head 12b close to a specific side wall side. The head holding part 26 is provided with a second projection 26a which moves the head 12b close to the side wall side where the first projection 24a is disposed.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a tire anti-skid device, and more particularly to a structure for connecting ends of wires that constitute a tire anti-skid device. [Background technology]

[0002] A known connection structure provided in the fastening means of a tire anti-skid device is disclosed in Patent Document 1. The connection structure disclosed in Patent Document 1 has a basic configuration in which male members are disposed on both ends of a steel wire (wire), and the pair of male members are engaged with a female member (connecting member). Here, the male member has a body portion, a neck portion, and a head portion. The body portion is an element that is crimped to the end of the wire, and the neck portion is a cylindrical portion provided on the tip side of the body portion and formed with a smaller diameter than the body portion. Furthermore, the head portion is a hemispherical portion provided on the tip side of the neck portion and formed with a larger diameter than the body portion.

[0003] The female part is basically a cylindrical member, with a space inside the cylinder capable of accommodating the head, and both longitudinal ends serving as openings with narrowed portions to prevent the head from slipping out. The cylinder also has a slit along its length that is slightly wider than the diameter of the neck, and an opening through which the head can be inserted is provided in the longitudinal center.

[0004] In such a connection mechanism, both of the male members that make a pair with the female member are detachable. Therefore, when tension is not applied to the wire, the female member is likely to fall off and there is a risk of it being lost. On the other hand, there is also a description of providing a cap that can be engaged with the female member in order to maintain the engagement state of the male member, but in this case, the number of parts will increase. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 58-153103 Summary of the Invention [Problem to be solved by the invention]

[0006] An object of this embodiment is to provide a connection structure for a tire anti-skid device that can easily fix a connecting member to a wire end without increasing the number of parts. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the connection structure of a tire anti-skid device of the present invention is a connection structure of a tire anti-skid device comprising a connecting member having a fixed side opening in which an end of a wire is fixedly held, and a detachable side opening in which the end of the wire is detachably held, wherein the wire arranged in the fixed side opening has a head at its tip which is composed of a columnar member having a larger diameter than the wire, the fixed side opening comprises a head insertion portion through which the head is inserted, a head holding portion which holds the head, and a wire insertion portion which is formed smaller in diameter than the head and through which only the wire is inserted, and wherein a first protrusion is provided on the side wall of the head insertion portion to move the head toward a specific side wall.

[0008] In addition, in the connection structure of the tire anti-skid device having the above-mentioned characteristics, it is preferable that the head holding portion is provided with a second protrusion that moves the head toward the side wall where the first protrusion is arranged. By having such a characteristic, the head that is transferred to the head holding portion is forcibly moved toward the center of the head holding portion.

[0009] In addition, it is preferable that the head in the connection structure for a tire anti-skid device having the above-mentioned characteristics is formed with a flat tip, and that the first protrusion is configured to have an inclined surface on the opening side and a return surface parallel to the bottom surface of the retaining portion on the head retaining portion side. With such characteristics, when the head moves from the head insertion portion side to the head retaining portion side, the inclined surface acts as a guide, allowing the head to move easily. On the other hand, when an attempt is made to move the head from the head retaining portion side to the head insertion portion side, the tip of the head comes into contact with the return surface, making it difficult to move, and preventing it from coming off.

[0010] In addition, in the connection structure of the tire anti-skid device having the above-mentioned characteristics, a bent portion may be provided in the wire insertion portion, and the head insertion portion and the head holding portion may be disposed at a position that is off the extension line of the attachment / detachment side opening. By having such characteristics, the length of the connecting member can be shortened. This makes it possible to narrow the distance between the ends of the tire anti-skid device that covers the tread surface of the tire. This makes it possible to improve the performance of the anti-skid device and the ride comfort of the vehicle.

[0011] Furthermore, in the connection structure of the tire anti-skid device having the above-mentioned characteristics, it is preferable that the first protrusion is provided so as to block a part of the insertion passage between the opening of the head insertion part and the head when the head is positioned at the center of the head holding part. By having such a characteristic, it is possible to reliably prevent the head from coming off the fixed-side wire end. Effect of the Invention

[0012] According to the connection structure of the tire anti-skid device having the above-mentioned characteristics, it is possible to easily fix the connecting member to the wire end without increasing the number of parts such as the connecting member. [Brief description of the drawings]

[0013] [Figure 1] 1 is a perspective view showing a connection structure of a tire anti-skid device according to a first embodiment. FIG. [Diagram 2] 1 is a cross-sectional view showing a connection structure of a tire anti-skid device according to a first embodiment. [Diagram 3] 4 is an exploded cross-sectional view showing the configuration of a connecting member, a fixed wire end, and a detachable wire end. FIG. [Figure 4] 11 is a cross-sectional view showing a state in which a fixed-side wire end portion is inserted into a fixed-side opening portion of a connecting member. FIG. [Diagram 5] 11 is a cross-sectional view showing a state in which a head of a fixed-side wire end portion inserted into a fixed-side opening of a connecting member is pulled into a head insertion portion. FIG. [Figure 6] 11 is a cross-sectional view showing a state in which a head of a fixed-side wire end is pulled from a head insertion portion into a head holding portion. FIG. [Figure 7] 13 is a cross-sectional view showing how the head of the fixed-side wire end portion, which has been pulled into the head holding portion, is pushed back by the action of the second projection. FIG. [Figure 8] 10 is a cross-sectional view showing a state in which a head of a fixed-side wire end is accommodated in a head holding portion of a fixed-side opening. FIG. [Figure 9] 4 is a diagram showing the fixed side opening as viewed in the direction of the arrow A in FIG. 3. [Figure 10] FIG. 2 is a perspective view showing the role of a connection structure in a tire anti-skid device. [Figure 11] FIG. 11 is a perspective view showing a connection structure of a tire anti-skid device according to a second embodiment. [Figure 12] 6 is a cross-sectional view showing a connection structure of a tire anti-skid device according to a second embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, the embodiments of the connection structure of the tire anti-skid device of the present invention will be described in detail with reference to the drawings. Note that the embodiments shown below are merely some of the preferred forms for carrying out the present invention, and even if some of the configuration is changed, it can be considered as part of the present invention as long as the effect of the embodiment is achieved.

[0015] [composition] The connection structure for a tire anti-skid device according to this embodiment (hereinafter simply referred to as connection structure 10) is for connecting the wire of fastening means 52 in a tire anti-skid device 50, as shown in Fig. 10. Specifically, it is basically composed of an end of the wire located on the fixed side (hereinafter referred to as fixed-side wire end 12), an end of the wire located on the detachable side (hereinafter referred to as detachable-side wire end 14), and a connecting member 20.

[0016] [First embodiment] First, the details of the connection structure according to the first embodiment will be described with reference to Fig. 1 to Fig. 3. In the connection structure 10 according to this embodiment, heads 12b, 14b having a diameter larger than that of the wires 12a, 14a are provided at the respective tips of the fixed wire end 12 and the detachable wire end 14. The heads 12b, 14b are columnar members made of, for example, metal, and may be attached to the tips of the wires 12a, 14a by crimping or the like. The shape of the heads 12b, 14b is not strictly limited, but it is preferable that at least the tip outer periphery has a surface facing the opposite surface 24a2 of the first protrusion 24a, which will be described in detail later, and in the example shown in Fig. 2 and Fig. 3, the tip is configured to be flat.

[0017] The connecting member 20 has a fixed-side opening 22 that holds the fixed-side wire end 12, and a detachable-side opening 30 that holds the detachable-side wire end 14. Here, the wire protruding-side opening in the fixed-side opening 22 (the opening for the wire insertion portion 28) and the wire protruding-side opening in the detachable-side opening 30 (the opening for the wire insertion portion 34) are disposed on opposing side surfaces of the connecting member 20.

[0018] The fixed-side opening 22 has a head insertion portion 24, a head holding portion 26, and a wire insertion portion 28. The head insertion portion 24 is located at one opening end of the fixed-side opening 22, is a hole through which the head 12b is inserted from the opening side toward the head holding portion 26 side, is circular when viewed from the opening side (viewed from the direction of arrow A), and is configured to be slightly larger in diameter than the head 12b (see FIG. 9).

[0019] The side wall of the head insertion portion 24 is provided with a first protrusion 24a. The first protrusion 24a is an element for moving the head 12b toward a specific side wall (in the present embodiment, the side wall opposite to the side wall on which the first protrusion 24a is arranged) when the head 12b passes through the head insertion portion 24. In the present embodiment, the first protrusion portion 24a has an inclined surface 24a1 on the opening side and a return surface 24a2 on the head holding portion 26 side. The inclined surface 24a1 is configured so that the amount of protrusion toward the center side of the head insertion portion 24 increases from the opening side to the head holding portion 26 side. The return surface 24a2 is a surface formed parallel to the bottom surface of the head holding portion 26, the details of which will be described later.

[0020] The diameter D of the head insertion portion 24 thus configured (see FIG. 9) is configured to be larger than the diameter d of the head 12b at the fixed-side wire end 12 by at least the height of the first projection 24a. In this embodiment, the distance L between the tip of the first projection 24a and the side wall facing the side wall on the side where the first projection 24a is arranged (see FIG. 9) is configured to be equal to or slightly larger than the diameter d of the head 12b.

[0021] The head holding portion 26 is an element that holds the head 12b inserted from the opening side of the head insertion portion 24 and prevents the fixed-side wire end 12 from falling out from the wire insertion portion 28 side. The head holding portion 26 is an opening located on an extension line of the head insertion portion 24, and its diameter may be equal to the diameter D of the head insertion portion 24. In addition, a second projection 26a is provided on the side wall of the head holding portion 26. The second projection 26a is provided on the side wall located opposite to the side wall on which the first projection 24a is arranged. By providing the second projection 26a, the head 12b that is moved toward one side wall side (the side wall side opposite to the side wall on which the first projection 24a is arranged) when passing through the head insertion portion 24 is pushed back toward the center of the head holding portion 26. The height H from the bottom surface of the head holding portion 26 to the opposite surface 24a2 of the first projection 24a is configured to be slightly higher than the height h of the head 12b.

[0022] The wire insertion portion 28 is an element for inserting the wire 12a of the fixed-side wire end portion 12. In this embodiment, a bent portion is provided in the wire insertion portion 28, and the head insertion portion 24 and the head holding portion 26 are provided at a position that is off the extension line of the detachable-side opening 30, the details of which will be described later. With this configuration, the distance between the wire protruding side opening (the opening of the wire insertion portion 28) in the fixed-side opening 22 and the wire protruding side opening (the opening of the wire insertion portion 34) in the detachable-side opening 30 can be shortened. This makes it possible to shorten the length of the connecting member 20. By shortening the length of the connecting member 20, the interval between the ends of the tire anti-skid device 50 that covers the tread surface of the tire can be narrowed. Therefore, the performance as an anti-skid device and the ride comfort of the vehicle can be improved.

[0023] The detachable-side opening 30 is an element that serves to insert and hold the detachable-side wire end 14. Specifically, it is composed of a head holding part 32 that holds the head 14b and a wire insertion part 34 through which the wire 14a is inserted, and is provided with a slit 36 ​​that continues from the head holding part 32 to the wire insertion part 34. The head holding part 32 may be configured to include a bottom surface that receives the head 14b provided on the detachable-side wire end 14, and a side wall or protrusion that covers at least a portion of the outer periphery of the head 14b.

[0024] The wire insertion portion 34 may be a hole smaller than the diameter of the head 14b and larger than the diameter of the wire 14a. The slit 36 ​​may be a groove smaller than the diameter of the head 14b and larger than the diameter of the wire 14a. An opening 38 having a width allowing the head 14b to be inserted is provided on the extension line of the slit 36 ​​at the tip side of the head holding portion 32.

[0025] [Effect] Next, the engagement of the wires (fixed-side wire end 12, detachable-side wire end 14) with the connecting member 20 in the connection structure having the above-mentioned configuration will be described. First, the case where the fixed-side wire end 12 is engaged with the fixed-side opening 22 of the connecting member 20 will be described with reference to Figs. 4 to 8. When the head 12b is not provided for the fixed-side wire end 12, the end of the wire 12a is inserted through the wire insertion portion 28 and the tip is drawn out from the head insertion portion 24. In this state, the head 12b is crimped to the end of the wire 12a to form the fixed-side wire end 12 as shown in Fig. 4. When the head 12b is already provided at the end of the wire 12a, the rear end side of the wire 12a can be inserted from the head insertion portion 24 side toward the wire insertion portion 28.

[0026] By pulling the wire 12a of the fixed-side wire end 12 in the state shown in Fig. 4 in the direction of pulling it out from the wire insertion portion 28 side, the head 12b provided at the end of the wire 12a passes through the head insertion portion 24 and is held by the head holding portion 26, as shown in Fig. 8. Here, when passing through the head insertion portion 24, the head 12b is pushed toward the side wall opposite the side wall on which the first projection 24a is provided by the action of the first projection 24a (see Fig. 5).

[0027] In this state, the head 12b that passes through the head insertion portion 24 and reaches the head holding portion 26 can pass between the first protrusion 24a and the second protrusion 26a by being slightly tilted as shown in FIG. 6. Then, the head 12b that reaches the head holding portion 26 is pushed back toward the center of the head holding portion 26 by the action of the second protrusion 26a as shown in FIG. 7. The distance L between the first protrusion 24a and the side wall is equal to or slightly larger than the diameter d of the head. Therefore, when the head 12b held by the head holding portion 26 is viewed from the opening side of the fixed side opening 22, as shown in FIG. 9, the first protrusion 24a is hanging on a part of the head 12b, that is, the first protrusion 24a blocks a part of the insertion path between the opening of the head insertion portion 24 and the head 12b.

[0028] Furthermore, height H from the bottom surface of head holding part 26 to opposite surface 24a2 of first projection 24a is slightly higher than height h of head 12b, and since the central position is determined by wire 12a, the free movement of head 12b housed in head holding part 26 is restricted as shown in Fig. 8. Therefore, even if the tension of wire 12a weakens and a force is applied to push head 12b toward head insertion part 24, head 12b will not be pushed toward head insertion part 24 because its tip comes into contact with opposite surface 24a2 of first projection 24a.

[0029] Next, a case where the detachable-side wire end 14 is engaged with the detachable-side opening 30 will be described. When engaging the detachable-side wire end 14, the head 14b provided at the end of the wire 14a is inserted through the opening 38, and the wire 14a is pulled out through the slit 36 ​​and then routed to the wire insertion portion 34. Thereafter, by applying a force to pull out the wire 14a extending from the wire insertion portion 34, the head 14b fits into the head holder 32 and the engagement is completed.

[0030] [effect] According to the connection structure 10 having the above-mentioned characteristics, both the fixed-side wire end 12 and the detachable-side wire end 14 only need to have heads 12b, 14b that can be fixed by crimping or the like, and when fixing the fixed-side wire end 12 to the fixed-side opening 22, the fixing is completed simply by pulling the wire 12a drawn out from the wire insertion portion 28. Therefore, the connecting member 20 can be easily fixed to the end of the wire 12a without increasing the number of parts.

[0031] [Second embodiment] Next, a connection structure for a tire anti-skid device according to a second embodiment will be described with reference to Fig. 11 and Fig. 12. The basic configuration of the connection structure 10A according to this embodiment is similar to that of the connection structure 10 according to the first embodiment. Therefore, parts having similar functions are given the same reference numerals in the drawings, and detailed descriptions thereof will be omitted.

[0032] A difference between the connection structure 10A according to this embodiment and the connection structure 10 according to the first embodiment lies in the form of the coupling member 20. Specifically, the coupling member 20 of the connection structure 10 according to the first embodiment has a so-called billet structure in which a fixed-side opening 22 and a detachable-side opening 30 are provided in a mass of resin, metal, or the like, whereas the coupling member 20 according to this embodiment is made of a tubular member (including a roll-shaped member).

[0033] Specifically, a fixed side opening 22 and a detachable side opening 30 are provided at both ends of the cylindrically formed connecting member 20, and an opening 38 for inserting the heads 12b, 14b provided at the ends of the wires 12a, 14a is provided in the side wall between the two, resulting in a shared structure.

[0034] The basic structures of the fixed-side opening 22 and the detachable-side opening 30 are similar to those of the connecting member 20 according to the first embodiment. That is, the fixed-side opening 22 has a head insertion portion 24 with a first protrusion 24a, a head holding portion 26 with a second protrusion 26a, and a wire insertion portion 28. The detachable-side opening 30 has a head holding portion 32 and a wire insertion portion 34, and a slit 36 ​​is provided to straddle both of them.

[0035] [effect] Even with the connection structure 10A having such a configuration, it is possible to easily fix the linking member 20 to the end of the wire 12a without increasing the number of parts, as in the first embodiment. In addition, the configuration of the linking member 20 is simpler than that of the linking member 20 according to the first embodiment. This also allows for a reduction in manufacturing costs.

[0036] [Application form] In the above embodiment, it has been described that the first protrusion 24a and the second protrusion 26a are provided on the head insertion portion 24 and the head holding portion 26 in the fixed side opening 22, respectively. However, the second protrusion 26a plays a role in pushing back the head 12b, which has been pushed toward the side wall by the first protrusion 24a, toward the center of the head holding portion 26. Due to this action, the head 12b is accommodated in a position overlapping the first protrusion 24a when viewed from the opening side (viewed from the direction of arrow A in FIG. 3), and is prevented from slipping out of the fixed side opening 22.

[0037] However, by increasing the diameter of head insertion portion 24 or a portion of the passage through which head 12b passes in head insertion portion 24 and by increasing the projection allowance of the first protrusion, head 12b housed in head holding portion 26 returns to the center side of head holding portion 26 due to the reaction force of wire 12a and comes to a position overlapping with first protrusion 24a when viewed from the opening side arrow. In such a configuration, it is not necessary to provide second protrusion 26a on head holding portion 26. This is because the above-mentioned effect can be achieved even with such a configuration. [Explanation of symbols]

[0038] Reference Signs List 10, 10A... Connection structure, 12... Fixed side wire end, 12a... Wire, 12b... Head, 14... Detachable side wire end, 14a... Wire, 14b... Head, 20... Connecting member, 22... Fixed side opening, 24... Head insertion portion, 24a... First protrusion, 24a1... Inclined surface, 24a2... Return surface, 26... Head holding portion, 26a... Second protrusion, 28... Wire insertion portion, 30... Detachable side opening, 32... Head holding portion, 34... Wire insertion portion, 36... Slit, 38... Opening, 50... Tire anti-skid device, 52... Fastening means.

Claims

1. A connection structure for a tire anti-skid device comprising a connecting member having a fixed-side opening in which an end of a wire is fixedly held, and a detachable-side opening in which the end of the wire is detachably held, the wire disposed in the fixed-side opening has a head portion at a tip end thereof, the head portion being made of a columnar member having a diameter larger than that of the wire; the fixed-side opening includes a head insertion portion through which the head is inserted, a head holding portion that holds the head, and a wire insertion portion that is formed smaller in diameter than the head and through which only the wire is inserted, A connection structure for a tire anti-skid device, characterized in that a first protrusion that moves the head toward a specific side wall is provided on a side wall of the head insertion portion.

2. 2. The connection structure of a tire anti-skid device according to claim 1, wherein the head holding portion is provided with a second protrusion for moving the head toward the side wall on which the first protrusion is disposed.

3. The head portion has a flat tip, The connection structure of a tire anti-skid device as described in claim 1 or 2, characterized in that the first protrusion is configured to have an inclined surface on the opening side and a return surface on the head holding portion side that is parallel to the bottom surface of the head holding portion.

4. 4. A connection structure for a tire anti-skid device as described in any one of claims 1 to 3, characterized in that a bent portion is provided in the wire insertion portion, and the head insertion portion and the head holding portion are arranged at a position off the extension line of the attachment / detachment side opening.

5. 5. The connection structure of a tire anti-skid device according to claim 1, wherein the first protrusion is arranged so as to block a portion of the insertion passage between the opening of the head insertion portion and the head when the head is positioned at the center of the head holding portion.

Images