JP2004034890A - Spare tire holding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent fixation of a spare tire from being released without engaging an operation member with an operation member engaging part of a rotary shaft. <P>SOLUTION: A spare tire holding device is constituted in such a way that a wire 30 constituting a tire pressing device 24 is wound up by operation of the rotary shaft 32 and a spare tire is pressed and fixed against a tire support member. A guide member 110 is provided to guide engagement of the operation member into an engaging recessed part 94 of the rotary shaft 32. The guide member 110 is made of synthetic resin, and an inner peripheral face of a guide part 114 is a guide face 116 guiding engagement with the engaging recessed part 94. The guide member 110 is rotatably held on the rotary shaft 32 in a cylindrical part 112. Consequently, the rotary shaft 32 cannot be rotated even if an attempt to grip and rotate the guide part 114 of the guide member 110 is made, thereby preventing theft. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in a spare tire holding device provided in a vehicle for holding a spare tire.
[0002]
[Prior art]
One type of spare tire holding device includes a device main body, an operation member engaging portion with which an operation member is engaged at a shaft end, a rotation shaft rotatably held on the device main body around a rotation axis, and rotation of the rotation shaft. Some include a tire pressing device which is operated by rotation of a shaft and presses and fixes a spare tire against a tire support member. It has been proposed to provide a guide member having a guide surface for guiding the operating member to an operating member engaging portion in such a spare tire holding device. One example is described in Japanese Utility Model Laid-Open No. 57-47487. In the spare tire holding device described in the above publication, a funnel-shaped metal guide member is fixed to the vicinity of the shaft end of the rotating shaft by fixing means such as welding.
[0003]
However, in the spare tire holding device including the guide member having the above configuration, even if the operation member is not engaged with the operation member engagement portion of the rotation shaft, if the guide member is gripped and rotated by hand, the rotation shaft Can be rotated. Therefore, the fixing of the spare tire to the tire support member by the tire pressing device can be released, and the spare tire may be detached from the spare tire holding device and stolen.
[0004]
Problems to be Solved by the Invention, Means for Solving Problems, and Effects
The present invention has been made in view of the above circumstances, and has been made to prevent the fixing of a spare tire from being released without engaging an operating member with an operating member engaging portion of a rotating shaft. In addition, according to the present invention, the following spare tire holding devices can be obtained. As in the case of the claims, each aspect is divided into sections, each section is numbered, and the number of another section is cited as necessary. This is for the purpose of facilitating the understanding of the present invention and should not be construed as limiting the technical features and combinations thereof described in the present specification to those described in the following sections. . In addition, when a plurality of items are described in one section, the plurality of items need not always be adopted together. It is also possible to select and adopt only some of the items.
[0005]
In the following items, (1) corresponds to claim 1, (2) corresponds to claim 2, and (3) corresponds to claim 3.
[0006]
(1) The device body,
A rotating shaft that is provided at the shaft end with an operating member engaging portion to which the operating member is engaged, and is rotatably held on the apparatus main body around a rotation axis;
A tire pressing device that is operated by the rotation of the rotating shaft and presses and fixes the spare tire against the tire support member;
A spare tire holding device including a guide surface provided with a guide surface for guiding the operation member to the operation member engaging portion, and a guide member provided near the shaft end of the rotating shaft;
A spare tire holding device, wherein the guide member does not transmit at least torque enough to rotate the rotating shaft to the rotating shaft.
If the guide member does not transmit at least torque enough to rotate the rotating shaft to the rotating shaft, it becomes impossible to rotate the rotating shaft by applying an external force to the guide member, and the tire pressing device is operated to operate the spare member. It is possible to prevent the tire from being fixed to the tire support member and being detached from the spare tire holding device.
In addition, since the tire support member normally constitutes a part of the vehicle body, in this section, it is assumed that the tire support member is not a component of the spare tire holding device. It can also be considered.
(2) The spare tire holding device according to (1), wherein the guide member is rotatably provided around the rotation axis with respect to the rotation axis.
The guide member is easily attached to the rotating shaft, but can also be attached to the apparatus main body. If the guide member is provided so as to be rotatable around the rotation axis with respect to the rotation shaft, the rotation shaft cannot be rotated even if the guide member is rotated.
(3) The guide member is provided so as to be relatively non-rotatable with respect to the rotating shaft, and has a strength such that the guide member is damaged when an external force is applied to generate a torque sufficient to rotate the rotating shaft. The spare tire holding device according to any one of the above.
The above strength of the guide member is realized by selecting the material, dimensions, shape and the like. For example, the material of the guide member may be a synthetic resin having a smaller strength than metal, or the shape of the metal guide member may be a funnel shape, and a plurality of slits may be provided in the guide member so as to generate enough torque to rotate the rotating shaft. If an external force is applied, it will break or deform.
(4) The spare tire holding device according to any one of (1) to (3), wherein the guide member is made of a synthetic resin.
If it is made of synthetic resin, the guide member can be configured at low cost. In addition, although the function of guiding the operating member to the operating member engaging portion is sufficient, it is easy to manufacture a guide member that is damaged if an external force is applied to generate a torque sufficient to rotate the rotating shaft. Implementation of the invention described in the section is facilitated.
(5) The guide member is provided so as to be relatively non-rotatable on the rotating shaft, and is deformed when an external force for generating a torque sufficient to rotate the rotating shaft is deformed, and the external force is applied to the rotating shaft. The spare tire holding device according to item (1), wherein the device is not transmitted.
For example, the guide member is made of rubber, and the material, hardness, dimensions, and the like are selected so as to satisfy the above conditions.
(6) The spare tire holding device according to (1), wherein the guide member is provided on the device main body so as not to rotate.
If the guide member is provided so as not to rotate on the apparatus main body, the rotation shaft cannot be rotated by rotating the guide member.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a spare tire holding device according to an embodiment of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, a support frame 14 is stretched between left and right side frames (not shown) of a vehicle body 10 of a vehicle, and is fixed to both side frames. The device main body 20 of the spare tire holding device in the present embodiment is held on the support frame 14. The device main body 20 has a generally box shape, and an upper wall portion thereof is fixed to the support frame 14 by a plurality of bolts 22. A tire pressing device 24 is provided inside the device main body 20. The present spare tire holding device holds a spare tire 26 in a state of being lifted by a wire 30.
[0008]
The tire pressing device 24 is a device that presses and fixes the spare tire 26 against the support frame 14 (or a stopper member provided on the support frame 14) that functions as a tire support member by attracting the spare tire 26 toward the device main body 20. The tire pressing device 24 is operated by a rotating shaft 32 (see FIG. 2). The rotation shaft 32 is held by the apparatus main body 20 so as to be rotatable around the rotation axis. The tire pressing device 24 can be configured in the same manner as that described in, for example, JP-A-2001-48064, and will be briefly described below with reference to FIGS. The tire pressing device 24 is held so as to be rotatable integrally with the rotating shaft 32, and rotates the rotating body 42 around which the wire 30 serving as a rope-shaped member is wound, and rotates the rotating body 42 from the rotating shaft 32 side ( That is, the rotating body 42 can be rotated by applying a rotating torque to the rotating shaft 32), but the selective rotation transmitting device 46 cannot rotate the rotating shaft 32 from the rotating body 42 side. It should be noted that the rope-like body may have a function similar to that of the rope, and includes not only the above-mentioned wire but also a rope, a chain, and the like.
[0009]
One end of the wire 30 is fixed and wound around the rotating body 42, the other end is hung down, and the tire holding member 50 is fixed to the lower end. The tire holding member 50 has a generally elongated shape, and both ends in the longitudinal direction are engaged with engagement holes 54 formed in the center of the wheel 52 of the spare tire 26, so that the tire of the spare tire 26 is The detachment from the holding member 50 is prevented, and the spare tire 26 is stably held on the tire holding member 50.
[0010]
As shown in FIGS. 4 and 5, the selective rotation transmitting device 46 has a first plate 62 integrally provided with a first gear 60, a first gear 60 having a smaller diameter than the first gear 60, and And a second plate 70 integrally provided with a second gear 66 meshed in an eccentric state. The first plate 62 is connected to the rotating body 42 (fixed in the illustrated example). The second plate 70 is rotatably engaged with an eccentric cam 68 provided integrally with the rotating shaft 32. In the illustrated example, the fitting hole of the second plate 70 is fitted to the eccentric cam 68 so as to be relatively rotatable. The second plate 70 includes an engaging portion 72 extending in a radial direction, and the engaging portion 72 is urged by a spring 74 in a direction to come into contact with the inner side surface (the bottom surface in the illustrated example) of the apparatus main body 20. . When the rotation shaft 32 is rotated, the eccentric cam 68 revolves around the rotation axis of the rotation shaft 32 while a part of the second gear 66 is meshed with the first gear 60. However, since the rotation of the second plate 70 and the second gear 66 is prevented by the engagement of the engaging portion 72 with the apparatus main body 20, the second gear 66 revolves almost without rotating. Therefore, each time the second gear 66 revolves once, the first plate 62 is rotated by one tooth of the first gear 60, and the rotating body 42 connected to the first plate 62 is also rotated. When the rotation shaft 32 is rotated in the forward direction, the wire 30 is wound up, and the spare tire 26 is made to approach the support frame 14. When rotated in the reverse direction, the spare tire 26 is unwound and separated from the support frame 14. When the wire 30 is wound, the tension of the wire 30 is transmitted to the rotating shaft 32 via the rotating body 42, the first plate 62, the first gear 60, the second gear 66, the second plate 70, and the eccentric cam 68. Is done. A rotational torque is generated on the rotating shaft 32 by the transmitted force. At the same time, the transmitted force is generated between the fitting surfaces of the second plate 70 and the eccentric cam 68 and between the rotating shaft 32 and the apparatus main body 20. A frictional force is generated between the fitting surfaces. Since the rotation preventing torque for preventing the rotation of the rotating shaft 32 based on the frictional force is larger than the rotating torque, the rotation of the rotating shaft 32 due to the tension is prevented, and the loosening of the wire 30 is prevented. Is done.
[0011]
As shown in FIG. 2, the protruding portion of the rotating shaft 32 protruding from the apparatus main body 20 has a stepped shape in which the shaft end 90 side is a large diameter portion having the largest diameter. The shaft end portion 90 is provided with an engagement concave portion 94 (in the illustrated example, a circular bottomed hole and a pair of U-shaped notches, which are an example of an operation member engagement portion capable of engaging a tool as an operation member. Comprising) is formed. Although not shown, the tool includes a shaft and a plurality of protrusions protruding from the outer peripheral surface of the shaft, and can be engaged with the engagement recess 94 in a relatively non-rotatable manner. By rotating the tool in the combined state, the rotating shaft 32 can be rotated. A guide surface 96 is formed on the end surface of the shaft end 90 of the rotary shaft 32 so as to guide the engagement of the tool into the engagement recess 94. A guide surface 98 that can guide the engagement of the tool is also formed on the periphery of the opening of the bottomed hole of the engagement recess 94. However, these guide surfaces 96 and 98 are not essential.
[0012]
A guide member 110 made of synthetic resin is provided near the shaft end 90 of the rotating shaft 32. The guide member 110 includes a cylindrical portion 112 having a cylindrical shape, and a funnel-shaped guide portion 114 integrally provided at one end of the cylindrical portion 112. A guide surface 116 that is a tapered surface that guides the engagement of the tool into the engagement recess 94 is formed on the inner peripheral surface of the guide portion 114. The guide surface 116 of the guide portion 114 is provided so as to be a tapered surface that is substantially continuous with the guide surface 98 of the engagement concave portion 94 and the guide surface 96 of the shaft end 90. The tool is easily fitted into the engagement recess 94 by being guided by these guide surfaces 96, 98, 116. The cylindrical portion 112 is fitted to the outer peripheral surface of the rotary shaft 32 so as to be relatively rotatable, and has an inward flange-like engaging projection 120 projecting inward in the radial direction at an end opposite to the guide portion 114. Is provided. When the guide member 110 is attached to the rotating shaft 32, the rotating shaft 32 is inserted from the guide portion 114 side of the guide member 110, and is held by the apparatus main body 20 so as to be rotatable and undetachable. The engagement protrusion 120 of the guide member 110 is sandwiched between the shoulder surface 124 of the rotation shaft 32 and both sides. Thereby, the axial movement of the guide member 110 is substantially prevented, and the guide member 110 is rotatable with respect to the rotation shaft 32.
[0013]
According to the present embodiment, even if the guide part 114 of the guide member 110 is gripped and rotated, the guide member 110 cannot rotate the rotary shaft 32 because the guide member 110 is rotatable with respect to the rotary shaft 32. Therefore, the rotation shaft 32 cannot be rotated without using a tool, and the fixing of the spare tire 26 is released and the spare tire 26 is prevented from being removed from the spare tire holding device and stolen.
[0014]
The attachment of the guide member 110 to the rotation shaft 32 is not limited to the above embodiment. For example, the embodiment shown in FIG. Portions that are configured in the same manner as in the above embodiment are given the same reference numerals, and descriptions thereof are omitted. This embodiment is suitable when the opposite end of the rotary shaft 32 has a larger diameter than the end 90 side. An annular groove 200 having a semicircular cross section is formed on the outer peripheral surface near the shaft end 90 of the rotating shaft 32, and a retaining ring 202 as a retaining device is fitted. On the other hand, a large-diameter hole 204 is formed in the inner peripheral surface of the end of the cylindrical portion 112 of the guide member 110 on the guide portion 114 side. The retaining ring 202 in the present embodiment is formed by bending a wire having a circular cross section into a C shape, and is inexpensive. When attaching the guide member 110 to the rotation shaft 32, the cylindrical portion 112 of the guide member 110 is fitted in the axial direction from the shaft end 90 side of the rotation shaft 32. Then, a retaining ring 202 whose diameter is expanded by elastic deformation is inserted into an annular space formed between the inner peripheral surface of the large-diameter hole portion 204 and the outer peripheral surface of the rotating shaft 32, and is inserted into the annular groove 200. When opposed, the retaining ring 202 is reduced in diameter, and the inner peripheral portion of the retaining ring 202 is fitted into the annular groove 200. The engagement between the shoulder surface 206 of the cylindrical portion 112 of the guide member 110 and the outer peripheral portion of the retaining ring 202 prevents the guide member 110 from coming off the rotation shaft 32. The guide member 110 is rotatable with respect to the rotation shaft 32 as in the above embodiment.
[0015]
The guide member 100 may be provided on the rotating shaft 32 so as not to rotate relatively. For example, the guide member 100 is fixed to the rotating shaft 32 by bonding or insert molding. In this case, since the guide member 110 is made of synthetic resin, the guide member 110 is damaged or deformed when an external force is applied to generate a torque sufficient to rotate the rotary shaft 32, and the guide member 110 is spared without using a tool. The release of the fixing of the tire 26 is prevented. That is, the object of theft prevention can be achieved only by adopting any one of the fact that the guide member 110 is rotatable with respect to the rotation shaft 32 and that the guide member 110 is made of synthetic resin.
[0016]
As described above, some embodiments of the present invention have been described in detail. However, these are merely examples, and the present invention has been described in the section [Problems to be Solved by the Invention, Problem Solving Means and Effects]. Various modifications and improvements can be made based on the knowledge of those skilled in the art, including the embodiments.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a spare tire holding device according to an embodiment of the present invention, together with a spare tire and a part of a vehicle body.
FIG. 2 is a side view (partial cross section) showing the spare tire holding device.
FIG. 3 is a side view (partial cross section) showing a spare tire holding device according to another embodiment of the present invention.
FIG. 4 is a side sectional view showing a main part of a tire pressing device of a spare tire holding device applicable to the above two embodiments.
FIG. 5 is a front sectional view showing a main part of the tire pressing device.
[Explanation of symbols]
14: Support frame 20: Device main body 24: Tire pressing device 26: Spare tire 30: Wire 32: Rotating shaft 110: Guide member 202: Retaining ring

Claims (3)

The device body,
A rotating shaft that is provided at the shaft end with an operating member engaging portion to which the operating member is engaged, and is rotatably held on the apparatus main body around a rotation axis;
A tire pressing device that is operated by the rotation of the rotating shaft and presses and fixes the spare tire against the tire support member;
A spare tire holding device including a guide surface provided with a guide surface for guiding the operation member to the operation member engaging portion, and a guide member provided near the shaft end of the rotating shaft;
A spare tire holding device, wherein the guide member does not transmit at least torque enough to rotate the rotating shaft to the rotating shaft. The spare tire holding device according to claim 1, wherein the guide member is provided rotatably around the rotation axis with respect to the rotation axis. 2. The spare according to claim 1, wherein the guide member is provided so as to be relatively non-rotatable on the rotating shaft, and has a strength that is broken when an external force is applied to generate a torque sufficient to rotate the rotating shaft. 3. Tire holding device.

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