JPS60255511A - Antiskid device for tire - Google Patents

Abstract

PURPOSE:To improve usual handiness of a tire due to possible attaching/detaching operation by one touch, and reduced size and weight of the whole device, by providing an advance/retreat mechanism and a check mechanism which checks movement of a clamping member. CONSTITUTION:Brackets 1A, 1B, 1C, a set of three pieces, engaged with the outer periphery of a tire 5 in hooked state, are supported by means of a knot point 15A, formed by the bracket and links 7A, 7B of equal length, and the tips of the links 7A, 7B. A knot point 15B, formed by other links 8A, 8B of equal length, is connected to the tips of clamping members 3A, 3B so as to freely advance or retreat with respect to said clamp members 3A, 3B. Further, in a housing body 4, which allows projection, in reciprocal directions, of a pair of clamp members 3A, 3B overlapping each other, a circular ratchet groove 17 is provided and a ratchet click 18 is fitted to an operational lever 19. Thus, a check mechanism, which prevents slackening of the members 3A, 3B due to operation of the lever 19, is provided.

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention is an anti-slip tire that is attached to a drive wheel to prevent the tire from slipping or slipping when driving on a snowy road, frozen road, or muddy surface. It is related to the device.

``Prior Art'' Tire chains are generally used to prevent tires from slipping during snowy conditions, but they have the drawbacks of being difficult to attach to tires, lacking in fitability, and causing large vibrations when driving.

On the other hand, anti-slip devices for tires with improved attachment to tires are known, such as Norwegian Patent No. 116188. However, the anti-slip device of the Norwegian patent houses four cross-shaped bar-shaped anti-slip bodies in a housing so that they can move forward and backward, and the tips of the anti-slip bodies, which are curved with a wave shape, are attached to the tire. The anti-slip body is housed in the housing as an integrated threshold object, so the anti-slip body cannot move forward or backward individually and follows the deformation of the tire when it touches the ground. As a result, a severe impact occurs when driving, resulting in unfavorable driving performance. Since mechanical strength is required to withstand the impact, it is inevitable that the entire device will be large and heavy, and it is also necessary to prepare various types of devices that correspond to the tire thickness. However, it has the drawback of lacking practicality.

"Problems to be Solved by the Invention" The purpose of the present invention is to solve the above problems of running performance and wearability in the prior art, as well as to make the device smaller and lighter, and to improve its handling etc. It is.

``Means for Solving the Problems'' The tire skid device of the present invention which achieves the above objects has a U-shaped portion that is attached to the outer periphery of the tire, and a non-slip uneven portion on the outer periphery. It consists of three sets of bracket bodies provided, a mounting member of a four-bar linkage mechanism consisting of two sets of equal length links, and a housing body in which a pair of bar-shaped tightening members are protruded in opposite directions and housed therein. The plastic nuts are each pivoted at the tips of the nodes where one set of equal length links intersect and the links forming the nodes, and the nodes of the other set of equal length links are The housing body is provided with an advancing and retracting mechanism for advancing and retracting at least one of the stored tightening members, and a non-returning mechanism that reverses movement of the tightening member. ”.

"Examples and Effects" The structure of the present invention and its effects will be explained in detail below based on Examples.

That is, in FIGS. 1 to 4 showing one embodiment thereof, the tire skid device of the present invention includes a set of three brackets, which are hooked to the outer periphery of the tire 5 to be installed.
lB10, an attachment member 2 of a four-bar link mechanism in which four par-shaped links 7ATBBA8B are connected in a quadrilateral shape, and a pair of bar-shaped tightening parts and members 8A8B are protruded and housed in relative directions, and the tightening members are It is composed of a housing body 4 having a forward/backward movement mechanism and a non-return mechanism, and the bracket bodies IA to 1c are connected to a node 15A formed by links 7A7B of equal length and a link 7A.
7B, and nodes 15B formed by other links 3A8B of equal length are connected to the tips of the tightening members 3Aj3B, and the nodes 15B are freely retractable with respect to the tightening members 3A3B.

In detail, the bracket bodies IA to IC are made of synthetic resin, as shown in FIG. A concave and convex portion 1o for stopping is formed. A pin hole 18 for connection with the link 7A7B is provided at the end that contacts the flank on the front side of the tire 5, and the other end 14 is shaped to come into pressure contact with the flank on the back side of the tire 6. . In addition, 11 in the figure is a spike planted in the ground contact area, and 12 is a protrusion that aims at locking property with the tire 5 degrees.

The attachment member 2 also includes two sets of links 7A7B and 8A8 forming a node 15A that connects the bracket body IB and a node 15B that is symmetrical to the node 15A and connects to the tightening member 8B.
] 3 are equal length links each having an inter-node distance of LIL2 shown in the figure, and a node 15 C15 between the equal length link 7A7B and another equal length link 8A8B is located at an arbitrary intermediate position of the equal length link 7A7B.
Then, the node 15B is connected via a pin to a long hole 16 formed at the tip of the tightening member 3B, and the node 15B is freely retractable toward the center of the tire 5 along the long hole 16. A pair of tightening members 3A3B are inserted from the window part configured to
The ends of one of the tightening members 8B are locked in the housing body 4 by a stopper pin 28, and the other tightening member 8A has a rack 22 on its side edge. It can be moved forward and backward with respect to the housing body 4 by a forward and backward movement mechanism which will be described later.

That is, an operating shaft 20 is provided upright on the housing body 4, an operating lever 19 is attached to the head of the operating shaft 20, and a pinion 21 that meshes with a rib 22 is attached to the middle of the operating shaft 20. The lever 19, the operating shaft 20, and the pinion 21 constitute an advancing/retracting mechanism, and the tightening member 8A can be advanced or retreated by rotation of the operating lever 19.

Furthermore, an annular ratchet groove 17 is bored in the earthen wall portion of the housing body 4, and a ratchet pawl 18 biased toward the ratchet groove 17 is slidably attached to the operating lever '-19. The bracket bodies IA to IC are fitted on the outer periphery of the tire 5 by operating the operating lever 19.
A non-return mechanism is provided to prevent the tightening member 3A3B from loosening by strongly attracting the fastening member 3A3B.

In the above configuration, the links 7A7B constituting the attachment member 2 are attached with their back surfaces in close contact with the front abdomen of the tire 5.

Further, the node 15B of the link 3A3B and the tightening member 9
The connecting means with A3B may be, for example, instead of the elongated hole portion 16, by tightening and connecting the two with a U-shaped metal fitting and making the node 15B retractable, or by attaching both of the tightening members 3A3B to the housing body 4. It may also be constructed so that it can move forward and backward.

According to the tire slip prevention device of the present invention having the above configuration, the bracket bodies IA to IC having the anti-skid uneven portions 1O are attached to the mounting member of the four-bar link mechanism at a required interval on the outer circumference of the tire 5. 2 and the tightening members 73A and 8B connected to the attachment member 2, the tire 5 can be strongly attracted and fixed to the tire 5, so that the anti-slip function of the tire 5 can be maintained when driving on snowy roads, muddy surfaces, etc. Can play well.

Then, the link length LIL2 of the four-bar linkage mechanism and the entire length of the link 7A7B are adjusted, and the tightening member 3A3B is
Considering the component force of the four-bar linkage mechanism caused by the tightening force of
At the same time, the attraction force in the normal direction of the tire 5 can be made uniform. Then, following the compressive deformation of the tire 5 when touching the ground, the attachment member 2
The node 15B retreats along the elongated hole 16, and the four-bar link mechanism freely deforms to equally retreat the bra'fy bodies IA to IC, so the impact during running is reduced and the running performance is significantly improved. When improved, the above-mentioned excellent holding force prevents the bodies IA to IC from coming off the tires 5- during driving, and the mounting posture becomes stable. In particular, according to the configuration of the embodiment, the ends 14 of the bracket bodies IA to IC are in pressure contact with the back side of the tire 5, and the back side of the link 7A7B of the attachment member 2 is in close contact with the tire 5. ) The attachment stability of bodies IA to IC is further improved.

Further, according to the anti-slip device of the present invention, vibrations and shocks due to the grounding of the plastic bodies IA to IC are also absorbed by the deformation of the attachment member 2 consisting of a four-bar link mechanism, and the tightening member 8A8B and the housing body Therefore, the mechanical structure of the part can be made smaller and lighter, and the mechanical reliability of the device is improved.

Furthermore, since the bracket bodies IA to IC1 attachment member 2 and the housing body 4 are constructed separately and can be freely disassembled, when the tire 5 has a different thickness or when the bracket bodies IA to IC are worn out, the bracket body IA to IC1 can be easily removed. ) can function immediately by simply replacing the bodies IA-IC. When mounting, the bracket bodies IA to IC are attached to the attachment member 2 and engaged with the outer periphery of the tire 5, and then the attachment member 2 and the tightening member 3A3B are connected and the operating lever 19 is rotated.
Since each of the bracket bodies IA to IC can be firmly attached to the tire 5, mounting and dismounting operations can be performed with just one touch, and combined with the above-mentioned reduction in size and weight, the mounting and dismounting operations are extremely simple. When removed from the tire 5, the structural members can be separated and folded and easily stored in a trunk or the like, making handling easier.

``Effects of the Invention'' As described above, the anti-slip device of the present invention has good running performance when installed, has excellent installation ability that makes it extremely easy to install and release the tire, and the entire device is small. It has practical effects such as being lighter and easier to handle on a daily basis.

[Brief explanation of the drawing]

Fig. 1: A perspective view showing a tire slip prevention device according to an embodiment of the present invention, Fig. 2: A front view showing the basics and configuration of the embodiment shown in Fig. 1, Fig. 3: Bracket body of the embodiment shown in Fig. 1. (
6) is a front sectional view thereof, (c) is a bottom view of (c), is a left side view of (0), and is a left side view of (0), Fig. 4 is a central longitudinal sectional view of the housing body of the embodiment shown in Fig. 1. Main symbols are lA~ IC bracket body, 2: mounting member,
3A9B: Tightening member, 4: Housing body, 5: Tire,
7A7B8A8B: ') Nk, 10: Uneven part, 16
: Long hole part, 17: Ratchet groove, 18: Ratchet pawl,
19: Operating lever, 20: Operating shaft, 21: Pinion, 2
2 Nirakku Patent Applicant Tokai Electric Cable Co., Ltd. (and 1 other person) Attorney + Masami Oka Figure 3 (C) Figure 4

Claims (1)

[Scope of Claims] (1) A set of three bracket bodies each having a U-shaped portion that engages with the outer periphery of the tire and provided with a non-slip uneven portion on the outer periphery, and two sets of equal length links. It consists of an attachment member of a four-bar linkage mechanism, and a housing body in which a pair of par-shaped tightening members are protruded and housed in opposite directions. The bracket bodies are respectively pivotally supported at the ends of the links formed, and the nodes where the other set of equal length links intersect are retractably connected to the ends of the tightening members, and the housing body for,
1. A tire skid device characterized by a structure that includes an advancing/retracting mechanism for advancing and retracting at least one of the stored tightening members, and a non-return mechanism for preventing movement of the tightening member. (2) The anti-slip device for a tire as set forth in claim (1), which comprises a bracket body whose tip end is brought into pressure contact with the back side abdomen of the tire. (8) A tire slip prevention device according to claim (1), in which a long hole provided in the tightening member and an attachment member are connected. (4) Claim No. 1 (1) in which the back surface of the link of the attachment member that pivotally supports the bracket body is brought into close contact with the abdomen of the tire surface.
) Anti-slip device for tires as described in item 2.