Tire chain fixing device, tire chain, and tensioning part

Abstract

To provide a tire chain fixing tool which has good installation workability and can reduce the maintenance cost of tire chains. [Solution] The tire chain fixing device 3 comprises a central member 4 made of a hard material and formed into a plate shape with a plurality of holes aligned in an annular or circumferential direction, an elastic portion 6 that is elastically deformable, and a plurality of tensioning members 5 attached to both ends of the elastic portion 6 and having a pair of connecting portions 7 with a connecting structure that allows them to be detachably connected to the central member 4 and the tire chain main body 2. In this tire chain fixing device 3, the central member 4 is arranged along the side of the wheel W, and the plurality of tensioning members 5 are evenly arranged circumferentially around the central member, and one of the pair of connecting portions 7 is connected to the central member 4 and the other to the tire chain main body 2, thereby applying tension to the tire chain main body 2 and fixing the tire chain main body 2 to the tire T.

Description

[Technical Field]

[0001] This invention relates to a tire chain fastener, a tire chain, and a tensioning part. More specifically, this invention relates to a tire chain fastener that is easy to install and can reduce tire chain maintenance costs, a tire chain equipped with this tire chain fastener, and a tensioning part that can be used as a replacement part for this tire chain fastener. [Background technology]

[0002] Tire chains are used when driving vehicles on snowy roads. Tire chains are made of metal or a fairly hard resin or rubber, and are formed into a ladder-shaped or tortoiseshell-shaped belt that is wrapped around the tire. Vehicles equipped with tire chains are less likely to slip when driving on snowy roads because the tire chain body that comes into contact with the snowy road has large unevenness in the ladder or tortoiseshell shape.

[0003] However, simply wrapping a tire chain around a tire does not ensure that the entire tire chain is firmly attached to the tire's surface, making it prone to slipping off. For this reason, tire chains are equipped with tire chain fasteners that secure the tire chain to the tire. The tire chain fasteners are typically formed as annular rubber rings, and are ultimately attached in a stretched state by hooking onto multiple hook members attached at fairly regular intervals around the tire chain's edge. When the tire chain fasteners are attached, the tire chain fasteners, which tend to contract, apply tension to the tire chain's main body toward its center of rotation, thereby tightly securing the tire chain to the tire. The tire chain fasteners, formed as annular rubber rings, are sequentially hooked onto the multiple hook members attached to the tire chain, stretching it after a certain amount of hooking, and then attaching it by balancing the entire hooking state. However, it is difficult to attach the tire chain so that the stretched state is even around the entire circumference. Therefore, depending on how the chain is attached, there is a risk that the force applied to each hook will vary to some extent, and this variation may become even greater as the vehicle moves. This variation can lead to the tire chain itself becoming misaligned or becoming biased relative to the tire, and in the worst case scenario, it may even come off the tire. Therefore, it is important for the driver to frequently check the chain's installation status. Therefore, tire chain fasteners designed to more easily apply tension to the tire chain itself have been proposed.

[0004] For example, Patent Document 1 discloses a tire chain fastener (tire chain fastener) that includes multiple tensioning members (pulling members) extending radially from a central member (base member) with hooks attached to the tips of these tensioning members (pulling members). This tire chain fastener is positioned along the side of the wheel and is attached by stretching the multiple radially extending tensioning members and hooking the hooks onto the tire chain body wrapped around the tire. This tire chain fastener applies a substantially uniform elastic force to each hook, making it easy to attach the tire chain body and to maintain the proper position (approximately centered) of the tire chain body after attachment. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-067641 Summary of the Invention [Problem to be solved by the invention]

[0006] In tire chain fasteners, the parts that are stretched and elastically deformed because tension is constantly applied to the tire chain body during use are subject to a lot of stress, and may suffer damage such as cracks or breakage.

[0007] However, the tire chain fixing device disclosed in Patent Document 1 has an integrated structure in which the central member and tensioning member are integrated, and if damage occurs to the elastically deforming part, the entire device must be replaced, which increases the maintenance costs of the tire chain.

[0008] The purpose of this invention was made in consideration of these points, and is to provide a tire chain fixing device, a tire chain, and a tensioning part as a replacement part that are easy to install and can reduce tire chain maintenance costs. [Means for solving the problem]

[0009] In order to solve the above problem, the tire chain fixing device of the present invention is designed to fix the tire chain body, which is wrapped around the tire of a vehicle traveling on snowy roads to reduce tire slippage when the vehicle is traveling on snowy roads, so that it is less likely to slip off the tire.

[0010] The tire chain fixing device of this invention is a central member formed in a plate shape with an outer size smaller than the outer size of the wheel that supports the tire and that has a plurality of holes that are annular or aligned in the circumferential direction, made of a hard material; a plurality of tension applying members each having an elastically deformable elastic portion and a pair of connecting portions attached to both ends of the elastic portion and having a connecting structure that allows the tension applying members to be detachably connected to the central member and the tire chain body; Equipped with When in use, the central member is positioned along the side of the wheel, and multiple tensioning members are evenly arranged circumferentially around the central member, with one of the pair of connecting parts being connected to the central member and the other being connected to the tire chain body, thereby applying tension to the tire chain body toward the center of rotation and securing the tire chain body to the tire.

[0011] In this tire chain fixing device, it is preferable to have at least a first central member and a second central member, each of which has a different outer size and is selectively used depending on the amount of tension to be applied to the tire chain body.

[0012] In this tire chain fixing device, the central member preferably has a circular ring shape or a rotationally symmetric ring shape.

[0013] In addition, in this tire chain fastener, it is preferable that the elastic portion is made of a long rubber material, and the pair of connecting portions are made of a hard material having a hook shape that can be hooked onto the central member and the tire chain body.

[0014] In this tire chain fixing device, it is preferable that the elastic portion has protruding portions formed near each end thereof that protrude in a direction intersecting the longitudinal direction.

[0015] Furthermore, in this tire chain fixing device, the elastic part is formed at each end with a hook support part including a through hole that penetrates in a direction intersecting the longitudinal direction, and a protrusion-shaped part that protrudes from the hook support part in the longitudinal direction, and it is preferable that each connecting part of the pair of connecting parts is formed with a ring-shaped part that passes through the through hole of the hook support part for attachment to the elastic part.

[0016] In addition, in this tire chain fastener, it is preferable that a reflective material that reflects light is attached to at least a part of the side surface of the elastic portion.

[0017] The tire chain according to the present invention is a tire chain that includes a tire chain body that is wrapped around the tire of a vehicle traveling on snowy roads to reduce tire slippage when the vehicle is traveling on snowy roads, and a tire chain fastener that secures the tire chain body to prevent it from slipping off the tire. This tire chain is characterized by the tire chain fastener being the tire chain fastener described above.

[0018] The tensioning component of this device is a component that applies tension to the tire chain body toward the center of rotation so that the tire chain body, which is wrapped around the tire of a vehicle traveling on snowy roads to reduce tire slippage when the vehicle is traveling on snowy roads, is less likely to slip off the tire. This tensioning component is characterized by having the same form as one of the multiple tensioning members of the tire chain fixing device described above. [Effects of the Invention]

[0019] According to the present invention, it is possible to provide a tire chain fixing device, a tire chain, and a tensioning component that are easy to install and can reduce tire chain maintenance costs. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a front view of a tire chain according to an embodiment attached to a vehicle tire. FIG. [Figure 2] 2 is a front view of a tire chain fastener used in the tire chain shown in FIG. 1. [Figure 3] 3 is a front view of a tensioning member used in the tire chain fixing device shown in FIG. 2. [Figure 4] 4 is a side view of an elastic portion of the tension applying member shown in FIG. 3. FIG. [Figure 5] 2 is a flowchart showing a procedure for attaching the tire chain shown in FIG. 1 to a tire. DETAILED DESCRIPTION OF THE INVENTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings, which do not necessarily reflect the actual dimensions of the tire chain.

[0022] (Configuration of tire chain 1) Fig. 1 is a front view of a tire chain 1 according to an embodiment attached to a vehicle tire, Fig. 2 is a front view of a tire chain fixing device 3 used in the tire chain 1, Fig. 3 is a front view of a tensioning member 5 used in the tire chain fixing device 3, and Fig. 4 is a side view of an elastic portion 6 in the tensioning member 5. Below, a tire chain 1 according to an embodiment to which the present invention is applied will be described with reference to these figures.

[0023] The tire chain according to the present invention is not limited to any particular vehicle, as the overall size can be configured to fit the vehicle to which it is applied, but the tire chain 1 according to the embodiment is configured to be attached to a tire T to reduce tire slippage when a construction vehicle travels on snowy roads. As shown in Fig. 1, the tire chain 1 includes a tire chain main body 2 that is wound around the tire T when attached to the tire T of the vehicle, and a tire chain fixing device 3 that fixes the tire chain main body 2 so that it is less likely to slip off the tire T.

[0024] The tire chain body 2 is a metal chain formed into a ladder-like belt. When in use, it is attached by wrapping it around the tire T of a vehicle and connecting both ends. The tire T with the tire chain body 2 attached reduces tire slippage when the vehicle is traveling on snowy roads due to the large unevenness of the tread surface, which varies depending on whether the chain of the tire chain body 2 covers it or not. When wrapped around the tire T, the tire chain body 2 adheres closely not only to the tread surface of the tire T but also to the shoulder surface and at least a portion of the sidewall surface, making it less likely to slip circumferentially or widthwise. The tire chain body 2 has the same shape as a conventional tire chain body, but is wider than the width of the tire T and bulges in the center so that it can be wrapped around the tire T once. Therefore, when simply wrapped around the tire, it does not adhere firmly to the entire surface of the tire T, such as the tread surface.

[0025] The tire chain fixing device 3 applies tension to the tire chain main body 2 in a direction that brings it into close contact with the tire T, thereby fixing the tire chain main body 2 so that it is less likely to slip off the tire T. Referring to FIG. 2, the tire chain fixing device 3 includes a central member 4 located in the center and multiple tension applying members 5 attached to extend radially from the central member 4.

[0026] The central member 4 is formed of a hard material such as metal and has, for example, a circular ring shape. More specifically, the central member 4 is formed as a ring with a thick (e.g., Φ5 to Φ10) metal wire wound around it and having a circular cross section, and an outer size smaller than the outer size of the wheel W that supports the tire T. The central member 4 is placed along the side of the wheel when in use. Although only one size of central member may be prepared (carried) in the tire chain fastener, the tire chain fastener 3 of this embodiment provides a plurality of central members 4, including at least a first central member 4A and a second central member 4B with different outer sizes, so that they can be selectively used depending on the magnitude of tension to be applied to the tire chain body 2.

[0027] 3 and 4, the tensioning member 5 is a long member whose overall length can be changed by elastic deformation, and includes an elastically deformable elastic portion 6 and a pair of hook-shaped connecting portions 7 attached to both ends of the elastic portion 6. The tensioning member 5 has a free length selected from a lineup of tensioning members with different free lengths to suit the size of the tire T to be mounted. A set of multiple tensioning members, appropriately selected for one central member 4, is installed so that, in use, tensioning members with the same free length extend radially from the central member 4 at approximately equal intervals in the circumferential direction; in this embodiment, six tensioning members 5 are set for one central member 4. In this specification, the term "longitudinal direction" refers to the direction in which the tensioning members 5 extend.

[0028] The elastic part 6 is made of a long, strong rubber material and is formed in a shape that is inverted left and right with the center as the longitudinal direction. The elastic part 6 has a main stretchable part 61 located in the center. In addition, the elastic part 6 has protruding parts 62, hook support parts 63, and protruding parts 64 formed from both ends of the main stretchable part 61 toward the tip. In addition, the elastic part 6 is attached with a reflective material 65 that reflects light.

[0029] The main telescopic section 61 has a long, thin, cylindrical shape that extends in a straight line. The main telescopic section 61 is the main section whose overall length changes when the tensioning member 5 is elastically deformed to change its overall length. An annular protrusion 61a is provided near the center of the main telescopic section 61 to prevent misalignment of a reflective pipe serving as a reflective material 65, which will be described later.

[0030] The overhanging portions 62 are provided on both ends of the main telescopic portion 61. The overhanging portions 62 have a width dimension equal to the diameter dimension of the main telescopic portion 61, and overhang on both sides of the side of the main telescopic portion 61 in a direction intersecting the longitudinal direction (for example, a direction perpendicular to the longitudinal direction) to an extent that fingers can be hooked on them. The overhanging portions 62 have an appropriate thickness so that they do not bend excessively when fingers are hooked on them and the main telescopic portion 61 is pulled.

[0031] The hook support portion 63 is provided on the longitudinal outer side of the protruding portion 62. The hook support portion 63 includes a through-hole 63a that penetrates in a direction intersecting the longitudinal direction, and is formed in a generally cylindrical shape that is laid down so that the longitudinal direction is the diameter direction.

[0032] The protruding portion 64 protrudes in the longitudinal direction from the hook support portion 63 with a depth dimension equal to the thickness dimension of the hook support portion 63 and a predetermined width dimension. The protruding portion 64 serves as a reinforcing portion that makes it difficult for cracks to occur on the side surface of the through hole 63a of the hook support portion 63 when the side surface of the through hole 63a is pulled in the longitudinal direction.

[0033] The reflective material 65 is made of a material that reflects light, and is suitably configured in the shape of a plate, pipe, or sheet, and is attached to at least a portion of the side surface of the elastic part 6. As an example, the reflective material 65 is a pipe whose surface reflects light, and the cylindrical shaft of the main telescopic part 61 is inserted into the inner diameter part of the pipe. Note that the pipe as the reflective material 65 is configured to be movable along the longitudinal direction within a range restricted by the annular protrusion 61a of the main telescopic part 61.

[0034] The pair of connecting portions 7 are made of a hard material such as metal wire and have a hook shape that can be hooked onto the central member 4 and the tire chain main body 2. As an example, each connecting portion of the pair of connecting portions 7 is shaped like the number 6, with a ring-shaped portion 71 on the inside and a hook-shaped portion 72 on the open end. The pair of connecting portions 7 have a connecting structure in which the ring-shaped portion 71 forms a ring that passes through the through-hole 63a of the hook support portion 63 and is integrated with the elastic portion 6, and the hook-shaped portion 72 can be detachably connected to the central member 4 and the tire chain main body 2.

[0035] When the tire chain fixing device 3 having these parts formed is in use, the central member 4 is positioned facing the side of the wheel W, and the multiple tensioning members 5 are evenly arranged circumferentially around the central member 4. When the tensioning member 5 of the tire chain fixing device 3 is stretched, one of the pair of connecting parts 7 is connected to the central member 4 and the other is connected to the edge of the tire chain main body 2, and elastic force applies tension to the tire chain main body 2 toward the center of rotation, thereby tightly fixing the tire chain main body 2 to the tire T.

[0036] When the tire chain 1 is attached to the tire T of a vehicle, the tire chain body 2 covers the entire tread surface of the tire T on the inside and the shoulder and sidewall surfaces of the tire T on the outside (edge ​​side), and is firmly fixed to the tire T by tightening the tire T with the tension of the tire chain fixing device 3, and as the vehicle moves, the ladder-shaped metal chain rotates integrally with the tire T and grips the snow surface. Next, the procedure for attaching the tire chain 1 will be described in detail.

[0037] (Tire chain installation procedure 1) 5 is a flow chart showing the procedure for attaching the tire chain 1 to a tire T. As shown in FIG. 5, the tire chain 1 is attached to the tire T by performing the tire chain body attaching step ST1, the tire chain fixture temporary fixing step ST2, and the tire chain fixture fixing step ST3 in this order.

[0038] First, in the tire chain body installation step ST1, the unfolded tire chain body 2 is wrapped around the tire T with its widthwise inner side along the tread surface, and both ends are connected together. As a result, the tire chain body 2 has its inner edge hooked onto the tire's inner sidewall, and its widthwise inner side covers one circumference of the tread surface of the tire T.

[0039] Next, in the tire chain fixture temporary fastening step ST2, the central member 4 of the tire chain fixture 3 and at least two tensioning members 5 are prepared. The central member 4 is then arranged side by side on the side of the wheel W, and the two tensioning members 5 pull the central member 4 in opposing directions, connecting it to the tire chain main body 2. The order in which the pair of connecting portions 7 of the tensioning members 5 are hooked onto and connected to the central member 4 and the tire chain main body 2 is not particularly limited. The central member 4 used here may be selected appropriately from among the prepared first central member 4A and second central member 4B, each with a different outer size, depending on the magnitude of the tension to be applied to the tire chain main body 2.

[0040] Next, in the tire chain fixture fixing step ST3, if six tensioning members 5 are to be set to one central member 4, the remaining four tensioning members 5 are connected by hooking each pair of connecting portions 7 onto the central member 4 and the tire chain main body 2 so that all six extend radially from the central member 4 at approximately equal intervals. Then, if necessary, the positions of the central member 4 and the tire chain main body 2 and the hooking positions of the tensioning members 5 are adjusted, and the attachment of the tire chain 1 to the tire T is completed.

[0041] Here, the tire chain 1 attached to the tire T may be subjected to load as the vehicle travels, causing it to become misaligned. In such cases, the position of each tensioning member 5 of the tire chain fixture 3 can be adjusted independently of the other tensioning members 5, so the misalignment can be corrected by attaching or detaching a specific tensioning member 5 as needed. Furthermore, the tire chain 1 attached to the tire T is subject to a large load not only on the tire chain body 2 that contacts the road surface, but also on the tensioning members 5 that are constantly stretched to apply tension. Partial damage to rubber tensioning members 5, in particular, may occur. In such cases, the damaged tensioning member 5 can be replaced with a separately available tensioning member (5) as a replacement part. This tensioning member (5) has the same configuration as one of the multiple tensioning members.

[0042] (Actions and Effects)

[0043] The tire chain fixing device 3 described above includes a central member 4 formed in an annular shape from a hard material. The tire chain fixing device 3 also includes an elastically deformable elastic portion 6 and multiple tensioning members 5 each having a pair of connecting portions 7 with a detachable connection structure to the central member 4 and the tire chain body 2. When in use, the tire chain fixing device 3 includes the central member 4 positioned along the side of the wheel W. The multiple tensioning members 5 connect one of the pair of connecting portions 7 to the central member 4 and the other to the tire chain body 2, thereby applying tension to the tire chain body 2 toward the center of rotation and securing the tire chain body 2 to the tire T. In other words, in the tire chain fixing device 3, each of the multiple tensioning members 5 is independently detachable from the central member 4 and the tire chain body 2, allowing them to apply tension to the tire chain body 2 independently or with minimal influence from other tensioning forces. Therefore, the tire chain fixing device 3 facilitates positioning and adjustment of the tension applied to the tire chain body 2. Furthermore, in the tire chain fixing device 3, the multiple tensioning members 5 are each independent, making it easy to hold both ends and pull each tensioning member 5, making stretching them during installation relatively easy. Therefore, the tire chain fixing device 3 allows for easier installation than conventional devices (especially those that apply tension to the tire chain body using a ring-shaped rubber). Furthermore, with the tire chain fixing device 3, even if one of the multiple tensioning members 5 is damaged, only the damaged tensioning member 5 needs to be replaced, reducing maintenance costs.

[0044] Additionally, the tire chain fixing device 3 includes at least a first central member 4A and a second central member 4B as central members 4, each with a different outer size, which are selectively used depending on the amount of tension to be applied to the tire chain body 2. As a result, with the tire chain fixing device 3, the amount of tension to be applied to the tire chain body 2 can be adjusted simply by replacing the central member 4, further improving convenience.

[0045] Furthermore, the tire chain fixing device 3 has a circular central member 4. This means that when the tire chain fixing device 3 is in an ideal position, the distance between the tread surface of the tire T and the central member 4 is equal everywhere, making it easier to adjust the tension of each of the multiple tensioning members 5 to be closer to an equal state.

[0046] Additionally, the tire chain fixing device 3 has an elastic portion 6 made of a long rubber material, and a pair of connecting portions 7 made of a hard material with a hook shape that can be hooked onto the central member 4 and the tire chain body 2. If the tire chain fixing device is constructed using such materials and in such a form, it is possible to form the tensioning members 5, each of which is independent, at a relatively low cost.

[0047] Furthermore, in the tire chain fastener 3, protruding portions 62 that protrude in a direction intersecting the longitudinal direction are formed near each end of the elastic portion 6. This makes it easy to hook and pull the protruding portions 62 with your fingers, making installation easier.

[0048] In addition, in the tire chain fastener 3, the elastic portion 6 is formed with a hook support portion 63 at each end, including a through-hole 63a that penetrates in a direction intersecting the longitudinal direction. Each connecting portion of the pair of connecting portions 7 is formed with a ring-shaped portion 71 that passes through the through-hole 63a of the hook support portion 63 for attachment to the elastic portion 6. This allows the tire chain fastener 3 to configure the tension-applying member 5 as an integrated component by joining the hook support portion 63 and the ring-shaped portion 71. In addition, the elastic portion 6 of the tire chain fastener 3 is formed with a protruding portion 64 that protrudes in the longitudinal direction from the hook support portion 63. This allows the tire chain fastener 3 to reduce the occurrence of breakage by increasing the thickness of the protruding portion 64, which is the portion to which stress is applied due to the tension between the hook support portion 63 and the ring-shaped portion 71.

[0049] Furthermore, the tire chain fastener 3 has a reflective material 65 attached to the side of the elastic portion 6. This makes the tire chain fastener 3 more visible to others when attached, especially at night, thereby increasing the safety of the vehicle to which it is attached.

[0050] Furthermore, according to the embodiment of the tire chain 1, since it is equipped with a tire chain fixing device 3, it is possible to enjoy the effects of the tire chain fixing device 3 described above, improve installation workability, and reduce maintenance costs.

[0051] [Other forms] Although the present invention has been described based on the above embodiment, the present invention is not limited to the above embodiment and can be embodied in various ways without departing from the spirit of the invention, for example, the following modifications are also possible.

[0052] (1) The number, shape, position, size, material, etc. of the components described in the above embodiment are examples and can be changed within the scope that does not impair the effects of the present invention.

[0053] (2) In the above embodiment, the tire chain body 2 is described as being made of metal and having a ladder shape, but the present invention is not limited to this. The tire chain body may be made of, for example, hard resin, and may have a tortoise shell shape, for example.

[0054] (3) In the above embodiment, the central member 4 of the tire chain fixing device 3 is described as being made of metal and having a circular ring shape, but the present invention is not limited to this. The central member may be made of, for example, a hard resin, may be a regular polygon with a number of corners corresponding to the number of tension-applying members used, or may be formed in the shape of a plate with a number of holes aligned in the circumferential direction.

[0055] (4) In the above embodiment, the elastic portion 6 of the tensioning member 5 of the tire chain fixing device 3 is described as being made of a long rubber material, but the present invention is not limited to this. The elastic portion may be, for example, a metal tension spring, as long as it can generate an elastic force that pulls the tire chain body toward the center member when the tensioning member is attached.

[0056] (5) In the above embodiment, the pair of connecting portions 7 of the tensioning member 5 of the tire chain fixing device 3 are described as having the same hook shape like the number 6, but the present invention is not limited to this. The pair of connecting portions 7 may have different shapes, as long as one can be detachably connected to the tire chain body and the other to the central member, and may have a mechanism for preventing disconnection, such as a carabiner.

[0057] (6) In the above-described embodiment, the free length of the tensioning member 5 of the tire chain fixing device 3 was constant at a predetermined length, but the tensioning member may also include a variable mechanism that can change the free length. [Explanation of symbols]

[0058] 1... tire chain, 2... tire chain main body, 3... tire chain fixing device, 4... central member, 4A... first central member, 4B... second central member, 5... tensioning member, 6... elastic portion, 7... (pair of) connecting portions, 61... main telescopic portion, 61a... ring-shaped protrusion, 62... protruding portion, 63... hook support portion, 63a... through hole, 64... protruding portion, 65... reflective material, 71... ring-shaped portion, 72... hook-shaped portion, ST1... tire chain main body attachment process, ST2... tire chain fixing device temporary fixing process, ST3... tire chain fixing device fixing process, T... tire, W... wheel

Claims

1. A tire chain fixing device that fixes a tire chain body that is wrapped around a tire of a vehicle traveling on snowy roads to reduce tire slippage when the vehicle is traveling on snowy roads so that the tire chain body is less likely to slip off the tire, a central member formed in a plate shape with an outer size smaller than the outer size of a wheel that supports the tire and that has a plurality of holes that are annular or aligned in the circumferential direction, made of a hard material; a plurality of tension applying members each having an elastically deformable elastic portion and a pair of connecting portions attached to both ends of the elastic portion and having a connecting structure that allows the tension applying members to be detachably connected to the central member and the tire chain body; Equipped with A tire chain fixing device characterized in that, when in use, the central member is positioned along the side of the wheel, the multiple tensioning members are evenly positioned circumferentially around the central member, and one of the pair of connecting parts is connected to the central member and the other is connected to the tire chain main body, thereby applying tension to the tire chain main body toward the center of rotation and fixing the tire chain main body to the tire.

2. The tire chain fixing device according to claim 1, The central members include at least a first central member and a second central member, each having a different outer size and selectively used depending on the magnitude of tension to be applied to the tire chain body. Tire chain fixing device.

3. The tire chain fixing device according to claim 1, The central member has a circular ring shape or a rotationally symmetric ring shape. Tire chain fixing device.

4. The tire chain fixing device according to claim 1, The elastic portion is made of a long rubber material, The pair of connecting portions are made of a hard material having a hook shape that can be hooked onto the central member and the tire chain body. Tire chain fixing device.

5. The tire chain according to claim 4, The elastic portion has a protruding portion formed near each end thereof, the protruding portion protruding in a direction intersecting the longitudinal direction. Tire chain fixing device.

6. The tire chain according to claim 4, The elastic portion has, at each end, a hook support portion including a through hole penetrating in a direction intersecting with the longitudinal direction, and a protruding portion protruding in the longitudinal direction from each of the hook support portions, Each of the pair of connecting portions has a ring-shaped portion that passes through the through hole of the hook support portion for attachment to the elastic portion. Tire chain fixing device.

7. The tire chain fixing device according to claim 4, The elastic portion has a reflective material attached to at least a part of a side surface thereof. Tire chain fixing device.

8. A tire chain includes a tire chain body that is wrapped around a tire of a vehicle traveling on snowy roads to reduce tire slippage when the vehicle travels on snowy roads, and a tire chain fixing device that fixes the tire chain body so that it does not easily slip off the tire, A tire chain comprising the tire chain fastener according to any one of claims 1 to 7 as the tire chain fastener.

9. A tensioning component that applies tension to a tire chain body toward the center of rotation so that the tire chain body is less likely to slip off the tire when the vehicle is traveling on snowy roads by being wrapped around the tire of the vehicle, and that reduces tire slip when the vehicle is traveling on snowy roads. The tensioning part has the same form as one of the plurality of tensioning members according to any one of claims 1 to 7.

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