JP2784422B2 - Tire anti-skid device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire anti-skid device mounted on a vehicle tire for traveling on a snowy road or the like. The present invention relates to an improvement in a fastening means for detachably fixing to a road wheel.

2. Description of the Related Art Conventionally, a tire anti-skid device includes a non-slip main body having a plurality of arms radially fitted on a road surface contact portion of a tire at a tip end thereof, and a special nut on a tire road wheel. Mounting and fixing the support member of the non-slip body to this dedicated nut with bolts, and fixing the non-slip body to the support member by fastening means are known (Japanese Patent Application Laid-Open Nos. 57-172805 and 57-172805). No. 60-56609).

However, in this tire anti-skid device, a support member must be attached to the road wheel in order to fix the anti-skid body to the road wheel, and when the anti-skid body is removed, the support member also becomes It has to be removed from the road wheel to avoid over fenders, which requires tedious and cumbersome attachment and detachment work.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tire anti-skid device in which a non-slip body can be securely fixed to a road wheel, can be easily attached and detached, and a base plate can be mounted on a road wheel even after the non-slip body is removed. And

Means for Solving the Problems In the tire anti-skid device according to the present invention, the anti-skid body having a plurality of arms radially from the annular substrate portion, the tip side of which is fitted to the road contact portion of the tire, A plurality of locking projections provided with receiving grooves along the circumferential direction from the open end are provided so as to protrude outwardly in the axial direction of the substantially flat body at predetermined intervals along the circumferential direction. The base plate fixed to the load wheel and the base plate are placed adjacent to the base plate, and the locking projection of the base plate is located in the base ring. A fastening means for fixing, wherein the fastening means is fixed to the base plate by fitting a plurality of engagement pieces projecting at predetermined intervals along the circumferential direction into receiving grooves of the locking projections. A disk portion and a lock which is locked on the inner surface of the disk portion facing the base plate and which is located adjacent to the locking projection of the base plate so as to close the open end of the receiving groove in which the engagement piece of the disk portion is fitted. A lock portion having a piece, a biasing means for resiliently supporting the lock portion between the base plate and the lock portion so that the lock piece of the lock portion can be displaced from the receiving groove of the locking projection, and the biasing means And an operating portion for pressing and deviating the lock portion inward in the axial direction against the pressure.

In the anti-skid device of this tire, when the anti-skid body is removed from the road wheel, the locking portion of the fastening means is axially moved by the operating portion against the urging means for resiliently supporting the locking portion with the base plate. When pressed inward, the lock piece located adjacent to the locking projection of the base plate is closed from the receiving groove position of the locking projection so as to close the open end of the receiving groove in which the engagement piece of the disk portion is fitted. When the disc is displaced and the open end of the receiving groove is released accordingly, if the disc is slid in the circumferential direction while the operating portion is pressed, the engaging piece of the disc is engaged with the locking projection. The entire fastening means including the disk portion can be detached from the base plate by being located between the projecting intervals of the plurality of locking projections provided at predetermined intervals along the circumferential direction by being detached from the receiving groove. Become. Conversely, when attaching the non-slip body to the load wheel, after applying the non-slip body to the base plate, the engaging piece of the disc portion is positioned between the projecting intervals of the plurality of locking projections. The fastening means is made to face the base plate, and in this state, the operating portion is pressed against the urging means which comes into contact with the base plate, whereby the lock piece of the lock portion is displaced from the receiving groove between the protrusion intervals of the locking projection. When the disk portion is slid in the opposite direction along the circumferential direction while being displaced as described above, the engaging piece of the disk portion can be fitted into the receiving groove of the locking projection, so that the base plate An annular base portion is fitted between the disk and the disk portion so that the non-slip body can be fixed to the load wheel by fastening means. When the pressing of the operating portion is released after the fixing, the urging means is resiliently displaced such that the locking portion is pressed against the disk portion, and the locking piece of the locking portion is positioned relative to the receiving groove of the locking projection to receive the locking. Since the open end of the groove is positioned adjacent to the locking protrusion of the base plate so as to close the open end of the groove, the engaging piece of the disk portion fitted into the receiving groove of the locking protrusion does not come off from the receiving groove of the locking protrusion. The lock portion can be securely attached to the base plate. Further, in this anti-skid device, since the anti-skid body is fixed to the base plate by the fastening means as described above, the base plate itself can be formed into a relatively thin flat plate including the locking projection. Therefore, the base plate can be equipped so as not to be over-fendered even when the non-slip body is removed and attached to the road wheel.

Embodiment The following is a description with reference to the accompanying drawings.

This anti-skid device is mounted on an automobile tire for traveling on snowy roads or the like. As shown in FIG. 1, an anti-skid body 1, a base plate 2, and fastening means 3 are provided.
It is comprised including.

As shown in FIG. 2, the non-slip body 1 has a plurality of arms 10a, 10b,.
, And is provided with an annular substrate portion 11 that radially extends and holds each of the arm portions 10a, 10b,.... Each of the arms 10a, 10b,... Is formed separately from the ring-shaped substrate 11, and the base of each arm is applied to the substrate 11, and a stopper 12 such as a rivet is attached.
By fixing them with a, 12b, etc., they can be integrally mounted so as to extend radially from the substrate section 11. Each arm
A plurality of spike pins 13 are protrudingly mounted outward on the tip side of 10a, 10b, and a plurality of engagement pins 14 are protrudingly mounted toward the road contact portion of the tire. it can. The board portion 11 having the arms 10a, 10b... Is a disc-shaped one, and an opening is formed at the center of the board so that the non-slip body 1 can be detachably fixed to the base plate 2 with the fastening means 3 with the board portion 11 interposed therebetween. 15 are formed.

The base plate 2 has a substantially disk shape as shown in FIG. 3a, and a plurality of base plates 2 are provided on the plate surface so that they can be jointly fastened with bolts (not shown) used to fasten a road wheel to a tire. Bolt insertion holes 20a, 20b
... are provided. These bolt insertion holes 20a, 20b…
Are formed in a long hole shape with different intervals so as to be able to cope with differences in bolt pitch and bolt number between different types of road wheels. A plurality of locking projections 21a, 21b,... Are provided at predetermined intervals along the circumferential direction near the center of the plate surface. Each of the locking projections 21a, 21b ...
Are provided so as to protrude outward in the axial direction of the substantially flat main body as shown in FIG. 3b. Its locking projection
As shown in FIG. 3c, 21a, 21b,... Are provided on the outer surface with a receiving groove 22 which becomes narrower in the circumferential direction from the open end 22a. The open end 22a is expanded and formed by notching the inner surface of the upper edge 22b obliquely from the open end 22a so that the piece can be easily fitted. Further, an opening 23 is provided at the center of the plate surface so as to be able to receive a protruding end side as an operation section described later of the fastening means 3 is deflected, and an operation section of the fastening means 3 is provided at an opening edge thereof. A receiving step portion 24 of the urging means for resiliently supporting is provided.

The fastening means 3 positions the opening 15 of the base plate 11 at the locking projections 21a, 21b... Of the base plate 2 fixed to the road wheel of the tire,
The main body 1 with the base plate 2 so that
As shown in FIG. 1, it is provided with a disk unit 30, a lock unit 31, a biasing unit 32, and an operation unit 33.

As shown in FIG. 4a, the disk portion 30 is substantially disk-shaped, and has an opening 300 in the center of the plate. Within the diameter of the opening 300, a plurality of engagement pieces 3 protruding toward the center side, respectively.
Are provided at predetermined intervals along the circumferential direction so as to correspond to the receiving grooves of the locking projections 21a, 21b, and the engagement pieces 301, 302,. The receiving groove 22 is formed in a shape to be fitted. In addition, a step portion 303 for locking the outer peripheral edge of the lock portion 31 is provided on the inner surface of the opening 300 opposite to the base plate 2 as shown in FIG. A polygonal rising flange portion 304 is formed on the outer surface side of the main body so as to fit the operation portion 33 so as to surround the opening portion 300, and the operation portion 33 is displaced along the hole edge of the opening portion 300 inside the polygonal rising flange portion 304. A rising flange portion 305 that allows and stops movement is provided. On the outer peripheral edge of the main body, a rising flange portion 306 concentric with the opening portion 15 of the non-slip main body 1 and slidably in contact with the step portion 16 formed on the plate surface of the substrate portion 11 has a smaller diameter than the step portion 16. It is provided so that it becomes.

As shown in FIG. 5a, the lock portion 31 is entirely in the shape of an emperor, and as shown in FIG. 5b, a cylindrical rising flange portion 3 having an opening 313 in the center from the plate surface of the annular substrate 315.
14 is provided on the radially inner side, and a plurality of substantially L-shaped lock pieces 310, the flange portion of which is thick at a predetermined interval along the circumferential direction from the outer peripheral flange of the substrate 315,
311 ... are provided. On the outer edges of the lock pieces 310, 311...
Are formed, and when the disc portion 30 and the lock portion 31 are engaged with each other at the step portions 303, 312, the lock pieces 310, 311... Are located adjacent to the locking projections 21a, 21b. Is formed so as to have a wall thickness capable of closing the open end 22a. The lock portion 31 is assembled integrally with the operation portion 33, and a cylindrical rising flange portion 314 having an opening portion 313 is formed at the center so as to protrude inward from the necessity. . The lock portion 31 is supported by an urging means 22 such as a compression spring or the like, including an operation portion 33, so as to be able to be displaced. The urging means 22 receives one end by the step portion 24 of the base plate 2 and the other end. It can be attached to the lock portion 31 by fitting it to the rising flange portion 314 of the lock portion 31 and fastening with a pin or the like.

The operating portion 33 has a polygonal shape to be fitted with the rising flange portion 304 of the disk portion 20 as shown in FIG. 6A, and has an opening portion of the lock portion 31 on its inner surface side as shown in FIGS. A plurality of hook-shaped hooking pieces 330, 331... That can be fitted into the protrusion 313 and engage with the protruding end side of the rising flange 314 are formed so as to protrude.
The operating portion 33 presses and deviates the lock portion 31 inward in the axial direction against the urging means 32, and a decorative member 332 such as an emblem is mounted on the outer surface side as shown in FIG. can do.

In the tire anti-skid device configured as described above, when the anti-skid body 1 is in the mounted state as shown in FIG. 1, the base plate 2 fixed to the road wheel of the tire and the disk portion 30 of the fastening means 3 are connected. The non-slip body 1 is fixed by positioning the annular substrate portion 11 between them. The non-slip body 1 is slightly displaced upward as the tire comes into contact with the road surface.
The step portion 16 is mounted on the rising flange portion 306 of the 30 so that the step portion 16 is slidably guided and allowed to rotate. This non-slip body 1
Are fastened by the base plate 2 by engaging the engaging pieces 301, 302,... Of the disk portion 30 with the receiving grooves 22 of the locking projections 21a, 21b,. At this time, the lock portion 31 is pushed by the urging means 32 and
And the step 312 are pressed against each other, and each lock piece 31
Are positioned so as to close the open ends 22a of the receiving grooves 22 into which the engagement pieces 301, 302,... Are fitted. Therefore, the disc portion 30 is
Are locked by the lock portions 31 so as not to come off from the receiving grooves 22 of the locking projections 21a, 21b, so that they can be securely attached and held to the base plate 2.

To remove the non-slip body 1 from this mounted state, as shown in FIG. 7, when the operating portion 33 is pressed against the urging means 32, the lock portion 31 causes the lock pieces 310, 311.
The open end 22a of the receiving groove 22 is opened by eccentrically moving inward so as to shift from the receiving groove 22 of a, 21b. Its operation part 33
When the disk portion 30 is slid in the circumferential direction while pressing the disk portion 30, the locking pieces 301, 302... Of the disk portion 20 can be removed from the receiving grooves 22 of the locking protrusions 21 a, 21 b.
The entirety of the fastening means 3 including 0 can be removed from the base plate 2 so that the non-slip body 1 can be removed from the tire. After the non-slip body 1 is detached, the base plate 2 may be mounted on the road wheel of the tire because the base plate 2 is formed in a thin and substantially flat plate shape. The fastening means 3 may be attached to the base plate 2 by the reverse operation.

Each of the above-mentioned components is formed using a thermoplastic such as polyacetal, polyamide, modified PPO, ABS resin, polyethylene, thermoplastic elastomer, thermoplastic polyurethane, or a thermoplastic such as fiber-reinforced plastic or thermoplastic polyurethane. be able to.
Further, the receiving groove 23 which is provided along the circumferential direction on the locking projections 21a, 21b... Of the base plate 2 does not necessarily need to be closed, and even if both sides are open,
The two open ends may be closed by the lock pieces 310, 311 ... of the lock part 31.

In the embodiment described above, the receiving groove 22 is provided in the locking projections 21a, 21b.
Are provided on the disk portion 30 of the first embodiment. Contrary to this, projections are provided on the locking projections 21a and 21b, and a receiving groove is provided on the disk portion 30. It can also be fixed by fitting with. Effects of the Invention As described above, according to the tire anti-skid device of the present invention, the anti-skid body can be securely attached to the base plate with the locking means at the lock portion. Instead of being operated in the direction of pulling out, the non-slip body can be removed by an extremely simple operation because it can be depressed inward and rotated to remove the disk portion from the base plate. In addition, since the base plate can be formed in a thin and substantially flat plate shape by the structure of the fastening means, the base plate can be reused while being attached to the road wheel of the tire even after the non-slip body is removed.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a tire anti-skid device according to the present invention, FIG. 2 is a perspective view showing a non-slip body of the device, and FIG. 3a is a front view showing an outer surface side of a base plate provided in the device. FIG. 3B is a cross-sectional view of the base plate taken along line AA shown in FIG. 3A, FIG. 3C is a partial perspective view showing a locking projection of the base plate, and FIG. FIG. 4B is a front view showing the outer surface side of the disk portion provided in the fastening means of the slip stopper, FIG. 4B is a cross-sectional view of the disk portion taken along line BB shown in FIG. 4A, and FIG. Fig. 5b is a front view showing the outer surface side of the lock portion provided in the fastening means, Fig. 5b is a cross-sectional view of the lock portion taken along line CC in Fig. 5a, and Fig. 6a is the fastening. FIG. 6B is a front view showing the outer surface side of the operation unit mounted on the means, FIG. 6B is a cross-sectional view of the operation unit taken along the line D-D shown in FIG. 6A, and FIG. Rear view showing the inner surface side, FIG. 7 is an explanatory view showing a removal operation state of the anti-slip device. 1: Non-slip body, 10a, 10b ...: arm, 11: substrate, 2: base plate, 21a, 21b ...: locking projection, 22: receiving groove, 22a:
Open end, 3: fastening means, 30: disk part, 301, 302 ...: engagement piece, 31: lock part, 310, 311 ...: lock piece, 32: urging means, 33: operating part.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-94004 (JP, A) JP-A-60-56609 (JP, A) JP-A-57-172805 (JP, A) 133005 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B60C 27/00 B60C 27/20

Claims (1)

(57) [Claims] 1. A plurality of arms (10a, 10b...) Whose front ends are fitted to a road contact portion of a tire are connected to an annular substrate (1).
The non-slip body (1) radially extending from 1) and the locking projections (21a, 21b...) Provided with receiving grooves (22) along the circumferential direction from the open end are provided in the axial direction of the substantially flat body. A base plate (2) fixed to a load wheel provided so as to protrude outward at predetermined intervals along the circumferential direction, and an annular substrate portion (11) on the base plate (2)
And the locking projections (21a, 21b...) Of the base plate (2) are positioned in the ring of the base plate (11), and the non-slip body (1) assembled to the tire is attached to the base plate (2). Fastening means (3) for detachably fixing the engagement means (3), wherein the fastening means (3) engages a plurality of engaging pieces (301, 302 ...) projecting at predetermined intervals along the circumferential direction. (21a, 21b ...) The disk part (30) fitted to the receiving groove (22) and fixed to the base plate (2), and the disk part (30) is engaged with the inner surface of the disk part (30) facing the base plate (2). And the engaging pieces (301, 302) of the disc portion (30)
…) Engages with the locking projections (21a, 21b) of the base plate (2) so as to close the open end (22a) of the receiving groove (22).
…) And a lock portion (31) having a lock piece (310, 311…) and a lock piece (310, 311) of this lock portion (31).
Biasing means (32) for resiliently supporting the lock portion (31) between the base plate (2) and the lock portion (31) so as to be able to shift the position of the lock portion (311 ...) from the receiving groove (22) of the locking projection (21a, 21b ...). ) And an operating portion (33) for pressing and deviating the lock portion (31) inward in the axial direction against the biasing means (32).