JP2018176948A - Automatic tightening fasteners for tire chains - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic tightener for a tire chain which can automatically tighten the tire chain even after the tire chain is attached to a tire, and can secure safety at work by preventing a turnaround of a wire which is not intended by a worker.SOLUTION: An automatic tightener 1 has: a windup roller 6 having a first ring gear 4 which is preparatorily stretched to a windup direction, and arranged coaxially so as to be turntable, and in which teeth are formed over an entire circumference, and a second ring gear 5 in which teeth are formed at a part of an external periphery; a wire rod 7 which is connected to the windup roller 6 at one end, connected to a part of a tire chain at the other end via an opening part 2 of a housing 3, and can be wound up to the windup roller 6; a toothed stopper 8 which is energized by an elastic body arranged between an inner wall of the housing 3 having a shape engaged with the teeth of the first ring gear 4 and itself; and an extrusion member 9 having a shape engaged with the teeth of the second ring gear 5.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a self-reinforcing fastener for a tire chain attached to a tire chain for securing the tire chain (snow chain) to a tire.

  In order for the tire chain to exhibit appropriate performance, the tire chain must be securely attached to the tire. That is, in order to exert the inherent performance of the tire chain and to enhance the durability of the tire chain, it is essential that the tire chain be properly fitted to the tire. However, since it is difficult for the tire chain to be mounted without slack while the vehicle is at rest, even if the tire chain is temporarily tightened at the time of initial installation, if the vehicle is allowed to travel, it will also slack. Therefore, it is necessary for the user to move the vehicle slowly forward or backward after the first chain installation, and then retighten (in effect "retighten") all of the tire chains installed on the wheels. Although such work may cause great damage if the tire chain is dislodged from the tire during traveling if it is forgotten or neglected, the work of retightening in this way is time-consuming for the user. Very unpreferable.

  Not only the economic aspect as described above, but also from the safety aspect, it is essential for the tire chain to be properly fitted to the tire, so even after one installation, the tire chain is automatically added automatically. Devices for tightening have been developed, i.e. various additional tightening type tire chains. As the additional tightening type tire chain, after installing the tire chain on the tire, many using a method that automatically tightens even after the installation is developed by using elastic force such as spring. .

  In order to be able to switch in one direction and in the reverse direction according to the patent document 1, it is possible to pull into the housing through the housing opening and be pretensioned in the winding direction in the housing A non-slip chain tensioning device (in the present case self-retaining fasteners for tyre chains) having two fixed positions for tension ropes coupled to a hoisting roller rotatably supported about an axis is disclosed There is. Such an anti-slip chain tensioning device can, in the first, fixed position, allow the torus to block movement in its tensioning direction and, in the second, clamping position, prevent movement opposite to its tensioning direction. It is possible to

JP 2007-261570 A

  Although the anti-slip chain tensioning device according to Patent Document 1 can certainly be switched in one direction and in the opposite direction, it is pre-tensioned in the winding direction in the housing and its axis In order to ensure that the hoisting roller rotatably supported around the belt tightens the tire chain more reliably, a spring (spring spring) with a large elastic force is incorporated to increase the degree of pretension. There must be. Then, if the work vehicle accidentally releases the hand during the installation work of the anti-slip chain tensioning device in a state where the wire can be pulled out (opened state), the wire reverses due to a strong elastic force. And the worker may be injured. In particular, since it is expected that the chain installation work will be carried out in a cold area where the hands are stagnant, it is important to prevent such a situation from occurring.

  The object of the present invention is to automatically retighten even after attaching a tire chain to a tire, and at the time of operation by preventing a worker's unintentional reversion of a wire rope (wire rod) It is an object of the present invention to provide an automatic tightening tool for a tire chain which can ensure the safety of the tire chain.

  In order to solve the above-mentioned problems, the invention described in claim 1 is an automatic tightening fastener for a tire chain for installation in a tire chain having a housing having an opening, which is pretensioned in a winding direction A take-up roller comprising a first ring gear having teeth formed on the outer periphery rotatably and coaxially installed, and a second ring gear having teeth formed on a part of the outer periphery, and one end of the take-up roller Are connected and the other end is connected to a part of the tire chain through the opening of the housing, and has a shape capable of being wound around the winding roller and meshing with the teeth of the first ring gear A toothed stopper biased by an elastic body, and a push-out member having a shape meshing with the teeth of the second ring gear; Member out and is, is installed via a connecting member, and is characterized in that it is installed to move in conjunction with each other.

  According to a second aspect of the present invention, in the first aspect of the present invention, the push-out member is provided with a projection having a tapered shape on the lower surface, and is biased by an elastic body in the central direction. A tip portion having a shape meshing with the teeth of the second ring gear, and a central direction pushing member biased outward by an elastic body, and an elastic in a vertical direction pushing up the central direction pushing member The tire according to claim 1, characterized by comprising: a push-up member having a tapered shape engaged with the projection from the center biased by the body to the outside, and a push button interlocked with the push-up member. It is characterized in that it is an automatic tightening tool for a chain.

  The invention according to claim 3 is the tire according to claim 1 or 2, wherein in the invention according to claim 1 or claim 2, the hook receiving member is installed in the opening of the housing. It is characterized in that it is an automatic tightening tool for a chain.

  According to a first aspect of the present invention, there is provided an automatic tightening tool for a tire chain comprising a first ring gear and a winding roller including a second ring gear having a tooth formed on a part of the outer circumference, and a part of the tire chain. It has a wire which is connected and can be taken up by a take-up roller, a toothed stopper urged by an elastic body, and an extrusion member having a shape meshing with the teeth of the second ring gear, The second ring gear, in which teeth are formed in a part of the second ring gear, is engaged by the push-out member having a shape engaged with the teeth of the second ring gear, so that the wire is rotated in the reverse direction over a certain distance. It is supposed not to. Therefore, when pulling out the wire rod, even if the work vehicle accidentally releases the hand during the installation work, the wire rod is reversed by a strong elastic force and the operator is not injured. , Safe work can be secured.

  The push-out member of the automatic reinforcement fastener for a tire chain according to claim 2 is composed of a center-direction push-out member and a push-up member. The center direction pushing member is provided with a projection having a tapered shape on the lower surface, and a tip having a shape engaging with the teeth of the second ring gear biased by the elastic body in the center direction. It is biased outward by an elastic body. On the other hand, the push-up member has a tapered shape that engages with the protrusion from the center biased outward by the elastic body in the vertical direction to push up the center direction pushing member.

  Therefore, when the push-out member pushes out the central push-out member in the center direction, the protrusion can pass over the push-up member and move inward and fall downward, so that the wire can be pulled out. Further, by pushing the push button in the vertical direction, the push-up member is lowered, and at the same time, the push-out member biased outward is shifted to the state of being pushed outward and tightened. As described above, it is possible to prevent the reversion to ensure the safety by the extremely simple operation, and to be in the retightening state.

  The hook receiving member installed at the opening of the housing of the automatic reinforcement fastener for a tire chain according to claim 3 connects the wire pulled out while being pre-tensioned in the winding direction from the opening of the housing to a part of the tire chain Since the hook is placed at the end of the opening of the housing so that a part of the hook for fitting can be contained, it can be guarded that the user can not put a finger on the opening of the housing. The automatic tightening fastener for a tire chain according to the present invention is structured so as not to rotate in the direction in which the wire rod reverses over a certain distance, but in the automatic tightening fastener according to claim 3 Furthermore, due to the failure due to some unforeseen force majeure, or the aging of the member related to the anti-return function, the self-retaining fastener body for the tire chain and the spring elasticity have returned to the opening of the housing at a considerable speed. As a result, there is no risk of injury caused by holding a finger between the housing opening and the hook.

It is a top view for demonstrating the internal structure of the automatic reinforcement fastener for tire chains which concerns on this invention. It is an exploded view of an automatic tightening fastener for a tire chain. It is explanatory drawing which shows the use condition of the automatic reinforcement fastener for tire chains. It is the whole top view for demonstrating the state to which the elastic force of the automatic tightening fastener for tire chains was open | released, and a partially expanded view. It is a whole top view for demonstrating the state to which the elastic force of the automatic reinforcement fastener for tire chains was accumulate | stored, and a partially expanded view. It is an exploded view of the hook installed in the tip of the automatic reinforcement fastener for tire chains. It is a general view of the automatic reinforcement fastener for tire chains concerning a modification.

<Structure of Automatic Reinforcement Fastener for Tire Chain>
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of an automatic tightening fastener for a tire chain according to the present invention will be described in detail based on FIGS. 1 to 5. FIG. 1 is an overall view for explaining an internal structure of a tire chain additional tightening according to the present invention. FIG. 2 is an exploded view of an automatic tightening tool for a tire chain.

  The main component responsible for the driving force for exerting the automatic retightening function of the tire chain expansion fastener 1 according to the present invention is a winding roller 6. As described in FIG. 1, the winding roller 6 is pretensioned by the spiral spring in the winding direction (the direction in which the tire chain is tightened), and the first ring gear 4 and the second ring gear 4 rotatably installed coaxially. The ring gear 5 is provided. As described in FIG. 2, although the first ring gear 4 has teeth formed over the entire outer periphery, the second ring gear 5 does not necessarily have teeth formed over the entire outer periphery, The teeth are formed only in part of the outer circumference.

  As another main component other than the winding roller 6, as shown in FIG. 1, one end is connected to the winding roller 6, and the other end is connected to a part of the tire chain through the opening 2 of the housing 3. And an elastic body disposed between the wire 7 (wire rope in the present embodiment) which can be wound around the winding roller 6 and the inner wall of the housing 3 having a shape meshing with the teeth of the first ring gear 4 And a push-out member 9 having a shape that meshes with the teeth of the second ring gear 5. The toothed stopper 8 and the pushing member 9 are installed via the connecting member 11, and when the toothed stopper 8 moves forward, the pushing member 9 moves rearward and the toothed stopper 8 moves backward. The push-out member 9 is adapted to move forward and is arranged to move in conjunction with the movement of the other.

  The push-out member 9 has a protrusion 12 (see FIG. 2) having a tapered shape on the lower surface and is formed to engage with the teeth of the second ring gear 5 biased by an elastic body in the center direction. The distal end portion 13 having the center portion 13 is installed, and the centering pushing member 14 urged outward by the elastic body and the centering pushing up the centering pushing member 14 are directed outward from the center urged by the elastic body. And a push-up member 15 having a tapered shape to be engaged with the projection 12. Further, a hook receiving member 16 is installed at the end of the opening 2 of the housing 3.

  FIG. 6 is an exploded view of a hook installed at the tip of the automatic tightening tool for a tire chain according to the present invention. In the automatic tightening fastener 1 for a tire chain according to the present invention, as shown in FIG. 6, a hook 17 for fixing to the tire chain is attached to the tip of the wire rope pulled out from the automatic tightening fastener 1 for a tire chain. It is done. The attachment of the wire rope to the hook 17 is a groove in which a spherical body having a diameter larger than the diameter of the wire rope installed at the tip of the wire rope (hook 17 side) is carved on the hook 17 side (substantially the same as the diameter of the wire rope The hook 17 is inserted into the longitudinal direction and divided into grooves by cutting a groove whose tip end has a dimension substantially the same as the diameter of the spherical body. By processing part of the wire rope side of the spherical body flat and increasing the hook 17 and the contact surface of the spherical body, winding stress from the wire rope pretensioned in the winding direction causes the hook 17 to the wire The rope is supposed not to get out.

<How to Use Automatic Reinforcement for Tire Chain>
FIG. 3 is a view for explaining how to use the automatic tightening tool 1 for a tire chain according to the present invention. As shown in FIG. 3, the automatic tightening fastener 1 for a tire chain according to the present invention is pulled through the housing 3 by connecting any two places of the housing 3 of the automatic tightening fastener 1 for a tire chain to the tire chain. The hook 17 installed at the end of the wire rod 7 (in the embodiment, the wire rope) is attached to the tire chain (engage the wheel of the tire chain with the pin of the hook) opposite to the tire chain connected to the housing 3 Connecting. By installing in this manner, the end of the wire rope is pulled in the direction of the automatic expansion fastener 1 for tire chains by the elastic force accumulated in the spring-spring installed inside the automatic expansion fastener 1 for tire chains, the result As tire chain will be automatically tightened. Next, the operation of the automatic tightening tool 1 for a tire chain according to the present invention when installed in the state of FIG. 3 will be described in detail.

<Action of Automatic Reinforcement for Tire Chain>
FIG. 4 is an overall top view and a partially enlarged view for explaining a state in which the elastic force of the automatic tightening tool 1 for a tire chain according to the present invention is released, and FIG. FIG. 16 is a whole top view and a partially enlarged view for explaining a state in which the elastic force of the force is accumulated. As a characteristic feature of the present invention, although the teeth are formed over the entire outer periphery of the first ring gear, the second ring gear does not necessarily have the teeth formed over the entire outer periphery, It is mentioned that teeth are formed only in the part.

  In order to make the elastic force of the automatic expansion fastener 1 for a tire chain described in FIG. 5 build up from the state in which the elastic force of the automatic expansion fastener 1 for a tire chain is released, FIG. As described above, when installing the tire chain self-reinforcement fastener 1 on the tire chain, the operator pushes the push-out member 9 (consisting of the center-direction push-out member 14 and the push-up member 15) and then the housing 3 By pulling out the wire rope through the above, the elastic force is accumulated in the inside of the automatic self-fixed fastener 1 for a tire chain (that is, the incorporated spring-spring is brought up).

  When the central pushing member 14 of the pushing member 9 (composed of the central pushing member 14 and the push-up member 15) is pushed toward the central direction, the outward pushing member placed on the lower surface of the central pushing member 14 At the same time, the protrusion 12 having the tapered shape is pushed toward the center direction, and at this time, the protrusion 12 moves over the push-up member 15 having the taper shape engaged with the protrusion 12 and moves inside.

  At this time, the tip end portion 14 of the push-out member 9 (constituted by the center-direction push-out member 14 and the push-up member 15) is the second ring gear 5 and the center-direction push-out member 14. The distal end portion 13 of the is capable of meshing. That is, since the second ring gear 5 is not formed with teeth over the entire outer periphery, the teeth are formed only in a part (four to six places) of the outer periphery, so the elasticity of the spiral spring is When being pulled back by force, the rotation can be stopped by the engagement of the second ring gear 5 and the tip 13 of the center direction pushing member 14 when it comes to the position of the teeth.

  Further, by pushing the push button 10 in the vertical direction, the push-up member 15 is lowered in conjunction with the downward movement of the push button 10, and is tapered outward to the outwardly urged lower surface. The projecting portion 12 having a shape is pushed outward. In the case of not using the automatic reinforcement fastener 1 for a tire chain according to the present invention, the elastic force as shown in FIG. 4 is released.

<Effect of Automatic Reinforcement for Tire Chain>
The automatic tightening fastener 1 for a tire chain according to an embodiment of the present invention is a first ring rotatably installed coaxially with a spring leaf spring installed inside so as to pretension the wire rope in the winding direction. One end is connected to the winding roller 6 including the gear 4 and the second ring gear 5, and the other end is attached to a part of the tire chain through the opening 2 of the housing 3, and the winding roller Toothed with two teeth biased by an elastic body placed between the wire rope which can be wound up to 6 and the inner wall of the housing 3 having a shape meshing with the teeth of the first ring gear 4 A stopper 8 and a push-out member 9 having a shape that meshes with the teeth of the second ring gear 5 are formed.

  The toothed stopper 8 and the push-out member 9 are installed via the connecting member 11, and are installed so as to move in conjunction with the rotational movement based on the rotation center of the connecting member 11. That is, when the toothed stopper 8 is in a position where it meshes with the teeth of the first ring gear 4, the tip 13 of the push-out member 9 is in a position away from the second link gear (a position where it does not mesh). When the stopper 8 is at a position away from the first ring gear 4, the tip 13 of the push-out member 9 is in a position meshing with the second link gear.

  The second ring gear 5 is engaged by the push-out member 9 having a shape that engages with the teeth of the second ring gear 5 (the teeth are formed on only a part of the outer periphery). , Is not to rotate more than a certain distance. Therefore, when pulling out the wire rope from the housing 3, that is, during the installation operation, if the worker accidentally removes the hand from the wire rope (or the attachment member to the tire chain) due to some bounce, the wire rope There is a possibility that the worker may be injured due to a strong elastic force, and the worker's safety can be secured by preventing this reversion.

  That is, even if the hand slips accidentally during operation, the second ring gear 5 does not have teeth formed over the entire outer periphery, but has teeth formed only on a part of the outer periphery. Although it reverses by a fixed distance, the stopper function acts to stop the reverse. Therefore, the operator pulls the wire through the housing 3 while securing safety, because the tip portion of the wire rope (including the attachment to the tire chain) stops before accelerating to a dangerous speed. After mounting, the elastic force for automatically tightening the tire chain can be accumulated inside.

  Furthermore, since the automatic chain fastener 1 for a tire chain has the hook receiving member 16 installed at the end of the opening 2 of the housing 3, the user can not place his finger on the opening 2 of the housing 3. It has a structure. Therefore, although the automatic retension fastener 1 for a tire chain is structured so that the wire does not rotate in the direction of turning back more than a certain distance, aging of the member related to any unforeseeable force majeure or function to prevent turning back is also possible. Between the opening 2 of the housing 3 and the hook even if it has returned to the opening 2 of the housing 3 at a considerable speed by the main body of the automatic tightening fastener 1 for a tire chain and the spring elastic force There is no risk of injury by pinching your fingers. That is, in the automatic tightening fastener 1 for a tire chain, double measures are taken in consideration of safety.

  Further, the push-out member 9 of the automatic re-tightening for tire chain 1 is composed of a center-direction push-out member 14 and a push-up member 15. The center direction pushing member 14 is provided with a projecting portion 13 having a tapered shape on the lower surface, and further has a shape engaging with the teeth of the second ring gear 5 biased by the elastic body in the center direction. The distal end portion 13 is installed and biased outward by an elastic body. On the other hand, the push-up member 15 is biased by an elastic body in the vertical direction in order to push up the center direction push-out member 14, and has a tapered shape which engages with the projection 12 outward.

  The push-out member 9 configured by the center-direction push-out member 14 and the push-up member 15 pushes the center-direction push-out member 14 toward the center direction, and the protrusion 12 having a tapered shape outward on the lower surface moves outward from the center. The wire rope can be pulled out by moving over the push-up member 15 having a tapered shape to be engaged with the protrusion 12 and moving inward and moving downward. Further, by pushing the push button 10 installed so as to push the push-up member 15 downward from the top in the vertical direction, the push-out member 15 is lowered while the push-out member 9 biased toward the outside simultaneously It is pushed out to the outside. After doing this, the wire rope is pulled out and accumulated inside the automatic tightening tool 1 for a tire chain, and the state shifts to a state where the tire chain can be further tightened. As described above, it is possible to prevent the reversion to ensure the safety by the extremely simple operation, and to be able to further tighten the tire chain.

<Example of change of automatic tightening fastener for tire chain>
The automatic tightening fastener for a tire chain according to the present invention is not limited to the aspect of each embodiment described above, and the opening, the housing, the first ring gear, the second ring gear, the winding roller, the wire, the teeth The configuration of the attached stopper, push-out member, push button, connecting member, projection, tip, center-direction push-out member, push-up member, hook receiving member, hook, etc. is within the scope of the present invention as needed. It can be changed as appropriate.

  For example, as shown in FIG. 7, the automatic retension fastener for a tire chain makes it impossible to pull out the wire rope to be adjacent to the pushing member 9 for making the wire rope ready to be pulled out. It is also possible to adopt a configuration in which an unrelease switch 18 is installed. The unrelease switch 18 can be engaged with the side surface of the pushing member 9 by sliding it in the direction orthogonal to the pushing direction of the pushing member 9. When the release switch 18 is installed as such, the push-out member 9 is made thicker so that the release switch 18 does not ride on the pushed-out push-out member 9 (ie, from the surface of the housing 3) Needs to be high).

  The automatic tightening fastener for a tire chain according to the present invention exhibits the excellent effects as described above. Therefore, when installing a tire chain during traveling on a snowy road, a device for automatically retightening the tire chain It can be suitably used as a member.

1 · · Automatic tightening fastener for tire chain 2 · · Opening 3 · · · Housing 4 · · First ring gear 5 · · Second ring gear 6 · · Take-up roller 7 · · Wire 8 · · · Toothed stopper 9 · · · · Push-out member 10 · · Push button 11 · · · Connection member 12 · · · · · · · · · · push-out member 15 · · · push-up member 16 · · hook receiving member 17 · · · hook 18 · · · · · switch

Claims (3)

An automatic tightening fastener for a tire chain, for installation in a tire chain comprising a housing having an opening, comprising:
A first ring gear pre-tensioned in the winding direction and rotatably formed coaxially on the outer periphery of which a tooth is formed on the outer periphery, and a winding roller including a second ring gear on which the tooth is formed on a part of the outer periphery ,
A wire having one end connected to the winding roller and the other end connected to a part of a tire chain through the opening of the housing and capable of being wound around the winding roller;
A toothed stopper having a shape meshing with the teeth of the first ring gear and biased by an elastic body;
And a push-out member having a shape engaging with the teeth of the second ring gear,
An automatic tightening fastener for a tire chain, wherein the toothed stopper and the push-out member are installed via a connecting member and installed so as to move in conjunction with each other. The pushing member is
A protrusion having a tapered shape is installed on the lower surface toward the outside, and a tip having a shape meshing with the teeth of the second ring gear biased by an elastic body in the center direction is installed, and an elastic body A central pushing member biased outward by the
A push-up member having a tapered shape that engages with the protrusion from the center biased outward by the elastic body in the vertical direction to push up the central push-out member;
The automatic reinforcement fastener for a tire chain according to claim 1, characterized by comprising a push button interlocked with the push-up member.   The automatic tightening fastener for a tire chain according to claim 1 or 2, wherein a hook receiving member is installed at an opening of the housing.

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