JPH0322004Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Purpose of the Invention>><Industrial Application Field> The present invention relates to a tire chain tightening device that is attached to the wheels of an automobile to provide an anti-slip effect.

<Background of the invention> For example, tire chains are provided on the market in which a rubber net is wrapped around a tire and the rubber net is tightened to the tire surface using an annular tightening wire at the side circumference. In this case, since the net is tightened by the tension of the tightening wire at the side circumference, the bending angle of the wire at the hook part that directly receives the tightening force is an extremely shallow obtuse angle, and the hook is attached to the axis where the hook should normally act. Only a small component of force toward the core can be obtained. For this reason, tire chains to which this type of tightening device is applied do not necessarily provide sufficient tightening force to the tires, and the tire chain often lifts off the tires, resulting in unsatisfactory performance. Not yet. Of course, as a technical method to solve the problem that the side peripheral part of the tire chain is insufficiently pulled toward the center of the wheel, the Japanese Patent Publication No. 47-22841
There is an invention of No. ``Anti-slip chain tightening device''.
However, in this case, a large number of tightening ropes that tighten the tire chain are installed independently and separately, and in actual use, these tangled tightening ropes are individually connected to the tire chain. An extremely troublesome work is required to lock the side circumferential portions in an orderly manner, and therefore, this prior art merely presents an idea, and in reality, it has hardly become popular in the market.

<Technical matters attempted to be developed> The present invention was made to solve the drawbacks of the conventional methods, and it is a method that effectively pulls the tire chain side circumference toward the axle side for a strong installation. The present invention aims to provide a new tire chain tightening device that can be easily handled and operated.

《Structure of the invention》 〈Means for achieving the purpose〉 That is, the tire chain tightening device of the present invention is as follows:
A main body attached to the outer surface of the wheel, a winding drum that rotates freely in one direction at all times due to the meshing of a ratchet claw attached to the center of the main body that can be freely engaged, and a winding drum that rotates freely in one direction. continuous tightening wires that are engaged with the side circumference of the tire chain at regular intervals to pull the tire chain toward the center; one end of the tightening wire is fixed to the winding drum, and the other end is fixed to the winding drum; The end of the tightening wire is fixed to the winding drum or the main body, and the middle part of the tightening wire is suspended near the outer periphery of the main body, and protrudes from the outer periphery of the main body at regular intervals to form the tightening part, and the tightening wire is fixed to the winding drum or the main body. This is characterized by the fact that by rotating the wheel and tightening the tightening wire, the side circumferential portion of the tire chain is drawn toward the center of the wheel, thereby achieving the above object.

<Example> The present invention will be specifically described below based on the illustrated example. Reference numeral 1 is a tire chain tightening device according to the present invention, 2 is a metal wheel, 3 is a tire,
Reference numeral 4 indicates a tire chain mainly composed of a rubber net, and reference numeral 5 indicates tightening hooks provided at regular intervals on the side circumference of the tire chain.
Note that the tire chain 4 is attached so as to be tightened on both the inner and outer surfaces of the tire, but the present invention is applied to the outer circumferential surface of the tire due to its structure, and the tightening method for the inner circumferential surface is not described. Needless to say, conventionally known ones can be adopted as appropriate. The tire chain tightening device 1 will be described in detail below. Reference numeral 10 denotes a main body, which is approximately disk-shaped, for example, and has a shape in which four spokes are formed from the center to the outer periphery. This main body 10 has a structure that can be attached to the wheel 2, and in this embodiment, as an example, it is press-fitted to a flange portion of a rim 2' of the wheel 2. That is, reference numeral 11 denotes a side guide portion, which comes into contact with the side circumferential portion of the flange portion of the rim 2'. Reference numeral 12 denotes an inner guide portion that is fitted inside the flange portion of the rim 2'. Of course, the method of attaching the main body 10 according to the present invention is not limited to this method, and it may also be fixed using, for example, a wheel nut. Furthermore, a winding drum 13 is rotatably provided at the center of the main body 10, and a nut-shaped rotation operation section 14 is formed outside the center, for example. In this embodiment, the diameter of the nut forming the rotary operation part 14 is made the same as the diameter of the wheel nut, so that the tightening operation can be performed using a wheel nut trench, making effective use of on-vehicle tools. This is preferable because it can be operated by
This configuration is not necessarily limited. As an example, the winding drum 13 is provided with a ratchet mechanism so that it can freely rotate clockwise in FIG.
Ratchet teeth 15 are formed on the outer periphery of the main body 10, and correspondingly ratchet claws 1 are formed on the main body 10 side.
6 is rotatably attached to the pin 17. The ratchet pawl 16 then sets the set spring 18.
As a result, the claws are always biting into the ratchet teeth 15 on the winding drum 13. The other end of the ratchet pawl 16 is configured to protrude rearward so that the ratchet can be released from the outside. Further, the main body 10 is provided with a tightening wire 20, which is divided into half circumferences by two wires, as an example, but it is also possible to divide the whole circumference by one wire. There is no problem in configuring it so that it acts on That is, this tightening wire 20 has one end fixed to the fixed end 21A of the winding drum 13, and is suspended around the wire guide pin 21 and then around the outer periphery of the main body. It extends outward in an inverted U-shape or V-shape to form a tightening portion 20'. Following the tightening portion 20' at one location, the tightening wire 20 is drawn into the main body 10 again from the adjacent wire guide 22, and further pulled out from the wire guide 22 again in an inverted U-shape or V-shape, and this configuration is described below. This is repeated until the other end reaches the fixed end 21B of the winding drum 13 and is fixed. Of course, this tightening wire 20 is tightened by the rotation of the winding drum 13 in the winding direction, and it is only necessary that at least one end is fixed to the winding drum 13, and the other end is not fixed to the main body 10. There is no problem. However, it is preferable to wind the tightening wire 20 symmetrically as in this embodiment, since the winding can be done in a well-balanced manner due to the action of the couple.

The present invention has the configuration described above, and tightens the tire chain under the following operations. That is, tire chain 4 with appropriate specifications.
After the tire chain is suspended around the tire 3, all the tightening portions 20' projecting in an inverted U-shape or V-shape are locked to the tightening hooks 5 of each tire chain. Thereafter, for example, a wheel nut trench of a tire is applied to the rotating operation part 14 of the winding drum 13, and the drum is rotated clockwise according to a conventional method. Of course, this direction of rotation may be any direction, but it is generally preferable to match the direction in which the screw is tightened, since this allows operations to be performed in accordance with the screw tightening habits. When the winding drum 13 is rotated in this way,
Both ends of the tightening wire 20 are sequentially connected to the winding drum 1.
3, and each tightening portion acts to pull the tightening hook 5 toward the center in the figure with an even force. At this time, for example, since the bending angle of the tightening wire 20 at the tightening hook portion is extremely acute, the tension generated in the tightening wire 20 effectively acts as a component force that draws the tightening hook 5 toward the center of the axle. After properly tightening in this manner, when the rotation of the winding drum 13 is stopped, the ratchet claw 16 immediately bites into the ratchet teeth 15 of the winding drum 13 by the ratchet mechanism, thereby preventing its rotation in the return direction. . To remove this when not in use, the rear end of the ratchet pawl 16 is operated from the outside to disengage the ratchet pawl 16 and the ratchet teeth 15. In such a case, the tension generated in the tire chain 4 loosens the tightening of the tightening wire 20 all at once, allowing the tire chain 4 to be removed.

<<Effects of the Invention>> As described above, according to the present invention, the tightening hook 5 of the tire chain 4 can be effectively pulled toward the center, making it possible to perform firm tightening. Further, the handling operation requires only the work of locking the tightening wire 20 to the tightening hook 5 and the work of rotating the winding drum, and the work is extremely easy to handle, regardless of technical skill. can.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a wheel of an automobile to which the present invention is applied, FIG. 2 is a front view of the same, FIG. 3 is a longitudinal sectional side view of the same, and FIG. 4 is a partially enlarged perspective view of the same. 1... Tire chain tightening device, 2... Wheel, 2'... Rim, 3... Tire, 4... Tire chain, 5... Tightening hook, 10... Main body,
11... Side guide part, 12... Inner guide part,
13... Winding drum, 14... Rotating operation section, 15
...Ratchet tooth, 16...Ratchet claw, 17
...Pin, 18...Set spring, 20...
Tightening wire, 20'... Tightening part, 21... Wire guide pin, 21A, 21B... Fixed end, 22...
...Wire guide.

Claims (1)

[Scope of utility model registration request] A main body attached to the outer surface of the wheel, a winding drum that rotates freely in one direction at all times by engagement of a ratchet pawl attached to the center of the main body that can be freely engaged, and a winding drum that rotates freely in one direction at all times. continuous tightening wires that engage the side circumference of the tire chain at regular intervals to pull the tire chain toward the center; one end of the tightening wire is fixed to the winding drum, and the other end of the tightening wire is fixed to the winding drum; The end of the tightening wire is fixed to the winding drum or the main body, and the middle part of the tightening wire is suspended near the outer periphery of the main body,
The tightening portions extend from the outer periphery of the main body at regular intervals, and by rotating the winding drum and tightening the tightening wire, the side circumferential portion of the tire chain is drawn toward the center of the wheel. A tire chain tightening device characterized by: