JPH0248304Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to a spare tire carrier for an automobile, and in particular to an improvement of a spare tire carrier that uses a wire rope to lift up the spare tire.

[Prior Art] Conventionally, this type of spare tire carrier has, for example,
There is one that utilizes a differential gear mechanism, as described in Japanese Utility Model Application Publication No. 49-7640. In such a differential gear mechanism, when lowering a lifted spare tire, the wheel winding the wire rope or chain is reversed by turning the handle manually or by power, and the wire rope or chain is unwound. is common. In the case of such a structure, conventionally, when lowering the spare tire, even though the chain or wire rope had finished unwinding, the worker would unknowingly turn the handle further and turn the wheel. There is a problem in that the chain or wire rope that has been driven and once unwound may be wound in the opposite direction. In response to this, conventional methods have been used, for example,
As described in Japanese Patent No. 16343, a reversible prevention device has been proposed in which a screw is coaxially provided on the wheel and screwed onto the casing side. There is also one that utilizes a ratchet mechanism, as described in Japanese Utility Model Publication No. 41-10330. In the former case, it is necessary to form a large-diameter male thread on the wheel and a large-diameter female thread on the casing side, which increases manufacturing costs and reduces resistance when the wheel rotates. The problem is that it is large. Further, the latter method has the problem that a complicated ratchet mechanism must be provided.

[Problem that the invention attempts to solve]

This idea was made in view of the above problems, and is a spare that has a simple structure and can reliably prevent reverse winding without significantly increasing manufacturing costs or increasing resistance during winding and unwinding. The purpose is to provide tire carriers.

[Means to solve the problem]

This invention provides a spare tire carrier that utilizes a differential gear mechanism equipped with wheels for winding up a wire rope, in which a stopper member having a diameter larger than that of the wire rope is attached near the winding start end of the wire rope. and adjacent to the outside of the wheel tangent at the point where the stopper member begins to separate from the outer periphery of the wheel when the wire rope is unwound;
The above object is achieved by providing a stopper that comes into contact with the lower end surface of the stopper member to prevent unwinding, and also allows the stopper member to pass in the unwinding direction while being wound around the wheel. It is something to do. Further, this invention achieves the above object by forming a recess on the outer periphery of the wheel to accommodate the inner side of the stopper member in the wheel radial direction in a wound state.

[Effect]

In this invention, the large-diameter stopper member attached to the wire rope allows the wheel to rotate in the unwinding direction in the winding state, and when the wire rope reaches the vicinity of the end of the unwinding, the stopper member has a large diameter. It moves outward in the direction and abuts the stopper to prevent the wheel from unwinding, thereby preventing reverse winding.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, this embodiment is a spare tire using a differential gear mechanism equipped with a wheel 12 for hoisting a wire rope 10 for suspending a spare tire (not shown). In the carrier 16, the wire rope 10 is attached near the winding start end of the wire rope 10.
a stopper member 18 having a larger diameter than that of the wire rope; a recess 20 formed on the outer periphery of the wheel 12 and housing the inner side of the stopper member 18 in the wheel radial direction in a wound state; 18 is adjacent to the outside of the wheel tangent line at the point where the stopper member 18 starts to separate from the outer periphery of the wheel 12, and comes into contact with the lower end surface 18A of the stopper member 18 to prevent unwinding, and also prevents unwinding when the stopper member 18 is wound around the wheel 12. A stopper 22 that allows the stopper member 18 to pass in the rewinding direction is provided. The wheel 12 is loosely fitted coaxially to the drive shaft 24 and is thereby supported by the drive shaft 24. At one end of the drive shaft 24 is a notch 2 into which a winding handle (not shown) is inserted and engaged.
4A, and an eccentric shaft 26 is integrally formed at the other end. A drive gear 30 that meshes with an internal gear 28 integrally provided at the end of the wheel 12 is rotatably fitted onto the eccentric shaft 26 . A thin shaft portion 24B rotatably supported by the case 32 is integrally formed at the end of the drive shaft 24 opposite to the cutout portion 24A, and the thin shaft portion 24B protrudes from the case 32. At the end,
The pin 34 is fitted to prevent the drive shaft 24 from coming off. Reference numeral 36 in the figure is a lock plate that is integrally attached to the drive gear 30 to prevent the drive gear 30 from rotating and to enable it to swing; 38 is a lock plate that urges the lock plate 36 in one direction. 40 indicates a guide plate for guiding the wire rope 10 into the rope groove 42 of the wheel 12. The stopper 2 is formed by bending the end of this guide plate 40. A recess 20 that accommodates the inner side of the stopper member 8 in the wheel radial direction is formed deeper than this in the rope groove 42 formed on the outer periphery of the wheel 12. That is, the position of the recess 20 in the wheel radial direction is such that when the stopper member 18 is inserted into the recess 20, the rotation radius of its outermost circumference substantially matches the outer end rotation radius of the wire rope 10 in the wound state. It is made to be. The wheel side end of the wire rope 10 is fixed to the wheel 12 with a metal fitting 44.
An anchor plate 46 for placing a spare tire is attached to the other end of the wire rope 10. When the drive shaft 24 is rotationally driven by the winding handle, the eccentric shaft 26
revolves around the rotation center axis of the drive shaft 24, thereby causing the drive gear 30 to swing vertically and horizontally, and for each rotation of the center of the eccentric shaft 26, the internal gear 28 and the drive gear 30 are rotated. It rotates by an angle corresponding to the difference in the number of teeth. At this time, the lock plate 36 is held in contact with the case 32 and cannot be rotated, so that it is only allowed to swing vertically and horizontally together with the drive gear 30. In this way, the wheel 12 winds up the wire rope 10 with reduced speed and increased torque. Wire rope 10 to lower the spare tire
When the wire rope 10 is unwound, the wire rope 10 is sequentially let out from the rope groove 42. At this time, the stopper member 18 attached to the wire rope 10 is wound (wound) around the wheel 12 together with the portion near the unwinding end of the wire rope 10, and is attached to the bottom of the rope groove 42. Since the inner side of the wheel in the radial direction is housed in the recess 20 formed deeper, the stopper member 18 can prevent the vicinity of the stopper 22 from coming into contact with it when the wheel 12 is rewinding and rotating. Can pass. When the vicinity of the unwinding end of the wire rope 10 is being unwound, the stopper member 18 is separated from the rope groove 42 and the recess 20 together with the wire rope 10 toward the outside in the wheel radial direction (see FIG. 4). Therefore, the lower end surface 18A of the outer portion of the stopper member 18 in the wheel radial direction comes into contact with the stopper 22, and is prevented from being drawn out downward. Here, since the outside of the wheel 12 is covered by the guide plate 40, even if the wheel 12 is to be rotated in the unwinding direction, the wire rope
There is no escape of the zero and the stopper member 18, so that the wheel 12 cannot be rotated any further, and the wheel 12 is prevented from reversing. In the above-mentioned embodiment, the stopper member 18 is connected to the stopper member 18 in such a way that its inner side in the wheel radial direction is accommodated in the recess 20 formed at the bottom of the rope groove 42 when the wire rope 10 is wound up. This prevents the interference of the stopper 22, thereby making it possible to unwind the wire rope 10 to the position of the stopper member 18, but the present invention is not limited to this.
The wire rope 8 may be any material as long as it does not interfere with the stopper 22 when it is wound together with the wire rope 10. Therefore, for example, the stopper 22 may be offset further below the position shown in FIG. 1 to prevent the stopper member 18 from interfering with the stopper 22 in the winding state when the recess 20 is not provided. You may also do so. However, in this case, the inner diameter of the guide plate 40 must be increased at least within the range of the rotation locus of the stopper member 18. Further, the stopper 22 may be a separate member from the guide plate 40.

[Effect of the idea]

Since the present invention is configured as described above, it has the excellent effect of being able to reliably prevent reverse winding of the wire rope with a simple structure without using a complicated reverse winding prevention device.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of a spare tire carrier according to the present invention, Fig. 2 is a sectional view of a portion corresponding to the - line in Fig. 1, and Fig. 3 is a sectional view of a portion corresponding to the - line in Fig. 2. , FIG. 4 is a sectional view similar to FIG. 1 showing the operation of the same embodiment. 10...Wire rope, 12...Wheel, 1
6... Spare tire carrier, 18... Stopper member, 18A... Lower end surface, 20... Recess, 22...
...Stotsupa.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a spare tire carrier using a differential gear mechanism equipped with wheels for winding up a wire rope from which a spare tire is suspended, the wire rope is installed near the winding start end of said wire rope. was given,
a stopper member having a larger diameter than the wire rope;
Adjacent to the outside of the wheel tangent at the point where the stopper member begins to separate from the outer periphery of the wheel during unwinding of the wire rope, abuts against the lower end surface of the stopper member to prevent unwinding, and prevents the wire rope from being wound around the wheel. A spare tire carrier comprising: a stopper that allows the stopper member to pass in the rewinding direction in the attached state. (2) The spare tire carrier according to claim 1, wherein a recess is formed on the outer periphery of the wheel to accommodate the inner side of the stopper member in the wheel radial direction in the rolled state.