JPH0733711U - Tow cable - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a stretchable traction cable capable of smooth traction by reducing the impact during traction and not slacking. [Structure] An elongated towing line 2 in the form of a cylindrical bag having flexibility and small elasticity, and two sets of elastic lines 6 and 7 accommodated in series in the towing line 2 and capable of expanding and contracting. , Two sets of elastic cords 6 and 7 having different elastic coefficients fixed to corresponding portions of the tow cord 2 in a state where the tow cord 2 is in a stretched state in a tensioned state. Equipped with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tow cable suitable for towing a vehicle or the like.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, as a tow cable used to tow a vehicle or the like, a wire rope, a synthetic fiber rope, or the like having an eye formed at both ends and a hook member fixed thereto has been widely adopted. However, with the tow cable, when the tow cable transitions from a slack state to a tense state, a large tow load suddenly acts on the towed vehicle, which gives the driver anxiety and discomfort. There was a problem.

Therefore, in order to reduce the impact during the towing, a large number of elastic ropes made of rubber rubber are juxtaposed to a long towing rope that is flexible and hardly expands. Just as the elastic cords are stretched when they are strained, both ends of the elastic cords are connected to both ends of the tow cords while the tow cords are slackened. A traction cable configured to alleviate this has been put to practical use.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned traction cable, since the impact is mitigated by one elastic rope, when the elastic modulus of the elastic rope is small, the impact when the traction load begins to act on the traction cable can be effectively absorbed. However, there is a problem in that it is not possible to effectively absorb the impact when the tow line is in a tensioned state, and when the elastic modulus is large, the impact when the tow line is in a tensioned state is absorbed. Although it can be effectively absorbed, it involves the problem that it cannot effectively absorb the impact when a load starts to be applied to the traction cable. Therefore, even when the elastic coefficient of the elastic cable is set to the optimum value, both the impact when the tow load starts to act on the tow cable and when the tow cable is in the tensioned state are absorbed to a satisfactory extent. I couldn't.

An object of the present invention is to provide a stretchable traction cable that reduces impact during traction, enables smooth traction, and does not loosen.

[0006]

[Means for Solving the Problems]

 The tow cable according to claim 1 is a long tow cable having flexibility and small elasticity, and a plurality of elastic wires that are arranged in series and arranged side by side on the tow cable. It is provided with a plurality of elastic cords having different elastic coefficients fixed to corresponding portions of the traction cord in a slackened state of the traction cord so that the draft cord is in an extended state in a tensioned state. . In the tow cable according to a second aspect of the present invention, the tow cable is composed of a long bag-shaped member, and the elastic cable is provided inside the tow cable.

[0007]

[Action]

 In the traction cable according to claim 1, a plurality of elastic cords having different elastic coefficients are arranged in series, and are arranged in parallel in a long traction cord having flexibility and small stretchability. Both ends of the elastic cord are fixed to the corresponding parts of the tow cord in a state where the tow cord is loosened, and when a tow load acts on the tow cord, the elastic cord with a small elastic coefficient first expands and the The part becomes in tension, and at this time the elastic rope with a large elastic coefficient expands slightly in accordance with the traction load, but it does not expand until the tow rope is in a tensioned state. The rope extends and the corresponding tow rope becomes in tension, and the entire tow rope becomes in tension and the vehicle or the like is pulled.

In this way, the elastic ropes having a small elastic coefficient are sequentially expanded, and the entire tow rope is put in a tension state to receive the tow load, so that the elastic rope having a small elastic coefficient is applied to the pulling cable. The impact when the tow load begins to be applied is effectively absorbed, and the elastic rope with a large elastic coefficient effectively absorbs the impact when the tow rope is in a tensioned state, and the impact during tow Will be significantly reduced.

In the traction cable according to the second aspect, since the elastic cord is provided in the elongated bag-shaped traction cord, the appearance of the traction cable can be improved and damage to the elastic cord can be prevented. It becomes possible.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1 and FIG. 2, the traction cable 1 is composed of a tow cable 2 that is made by weaving a tough chemical fiber or the like that is flexible and has low elasticity, into a long tubular shape, and a tow cable 2. It is provided with a pair of hook members 3 attached to both ends, and a cushioning means 4 incorporated in the tow line 2. Instead of the hook member 3, eyes may be formed at both ends of the tow line 2.

A lever member 5 for preventing slipping off is rotatably attached to the base end of the hook member 3, and the lever member 5 is constantly urged to a locking position shown in FIG. 4 by a spring member (not shown). The pulling cable 1 is connected to the vehicle by hooking the hook member 3 at a proper position on the vehicle while rotating the lever member 5 against the biasing force of the spring member.

The cushioning means 4 is for cushioning a shock during towing. As shown in FIGS. 1 to 5, a first elastic rope 6 and a second elastic rope 7 are provided in the tow rope 2. The first elastic cords 6 are accommodated in series, and the first elastic cords 6 are composed of one unit elastic cord 8 in which a large number of rubber threads are bundled. The elastic coefficient of the second elastic cable 7 is set to twice the elastic coefficient of that of the first elastic cable 6. The elastic coefficient of the second elastic rope 7 may be set larger than that of the first elastic rope 6 by changing the thickness of the rubber thread or the material of the rubber thread. Further, the ratio of the elastic coefficients of the first elastic rope 6 and the second elastic rope 7 is appropriately set according to the maximum traction load and the like. Further, the length ratio between the first elastic rope 6 and the second elastic rope is also set appropriately according to the load application.

Eye portions 8a are formed at both ends of the three unit elastic cords 8, respectively, and inner ends of both elastic cords 5 and 6 are connected via connecting bands 9 through which the inner three eye portions 8a are inserted. The connecting band 9 is sewn and fixed to the fixing portion 10 in which the substantially central portion in the longitudinal direction of the tow rope 2 is flattened, and is connected to the three eye portions 8a at the outer ends of both elastic ropes 5 and 6. The fixed bands 11 are connected to each other, and the fixed bands 11 are sewn and fixed to the fixing portions 12 having flattened portions near both ends of the tow line 2 in a state where the tow line 2 is slackened in a bellows shape, and both elastic lines are fixed. Both ends of 5 and 6 are inserted through the ring portion 3a of the hook member 3, folded back and sewn to the fixed portion 12.

The portion of the tow rope 2 corresponding to the first elastic rope 6 is formed with a first telescopic portion 13 which is expandable and contractible and folded in a bellows shape in a state in which a tow load is not applied. A portion of the tow rope 2 corresponding to the rope 7 is formed with a second telescopic portion 14 which is expandable and contractible and is folded in a bellows shape in the state where no tow load is applied.

Next, the operation of the tow cable 1 will be described. When the hook member 3 is engaged with the vehicle and the defective vehicle or the like is towed, first, as shown in FIG. 6, the first elastic cord 6 extends until the first elastic portion 13 becomes in a tensioned state, and the first elastic rope 6 is released. The impact absorbing action of the sex cord 6 effectively absorbs the impact at the time when a traction load starts to act on the traction cable 1, and then, as shown in FIG. The second elastic cord 7 is stretched until the tension state is reached, and the impact caused when the tow cord 2 is in a tensioned state is effectively absorbed, and the two elastic portions 13 and 14 are in a tensioned state and are broken. The vehicle is towed. However, the second elastic cord 7 is slightly stretched until the first elastic portion 13 is in a tension state, but the elastic coefficient of the second elastic cord 7 is set to be larger than that of the first elastic cord 6. The impact when the traction load starts to be applied is mainly absorbed by the first elastic ropes 6.

In this embodiment, two sets of elastic cords 5 and 6 having different elastic coefficients are used to absorb the impact during towing. However, three or more sets of elastic cords having different elastic coefficients can be used to more finely tune. You may absorb the shock at the time of towing. As the elastic cords 5 and 6, the unit elastic cords 8 in which a large number of rubber threads are bundled are used, but an elastic cord in which a tube-shaped, strip-shaped or column-shaped rubber member is bundled alone or in plurals may be used. Alternatively, an elastic cord made of a tension coil spring may be used. A slightly elastic material may be used for the towing line 2 to absorb the impact during towing more finely. Further, the hook member 3 having a different shape may be used, or both ends of the tow cable 1 may be formed in a ring shape without attaching the hook member 3.

A waterproof coating may be applied to the inner surface of the tow line 2 to enhance the durability of the buffer means 4. Further, the tow line 2 may be made of a chemical fiber impregnated with a fluorescent color paint or the like to enhance the safety of the tow operation at night. Although the present invention is applied to the tow cable 1 of the vehicle in this embodiment, the present invention can be applied to a tow cable other than the vehicle in the same manner.

[0018]

[Effect of device]

 According to the traction cable of claim 1, with a simple configuration in which a plurality of elastic cords having different elastic coefficients are provided, when a traction load starts to act on the traction cable and the traction cable is in a tension state. Both impacts at this time are reduced and smooth towing is possible, which can prevent the driver from feeling anxious or uncomfortable. According to the tow cable of the second aspect, the tow cable is made up of a long bag-shaped member, and the elastic cable is provided inside the tow cable, so that the appearance of the tow cable can be improved and the elasticity can be improved. It is possible to prevent damage to the rope.

[Brief description of drawings]

FIG. 1 Side view of a tow cable

[Fig. 2] Bottom view of the tow cable

FIG. 3 is a perspective view of cushioning means.

FIG. 4 is a cutaway side view of a main part near a hook member.

FIG. 5 is a side view of a notch of a main portion near the connecting band.

FIG. 6 is an explanatory view of the operation of the tow cable when the first expansion / contraction part is in a tension state.

FIG. 7 is an explanatory diagram of the operation of the tow cable when both the stretchable portions are in a tensioned state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Towing cable 2 Towing line 3 Hook member 3a Ring part 4 Buffer means 5 Lever member 6 1st elastic line 7 2nd elastic line 8 Unit elastic line 8a Eye part 9 Connecting band 10 Fixing part 11 Fixing band 12 Fixing part 13 1st Flexible part 14 Second flexible part

Claims (2)

[Scope of utility model registration request] 1. A long tow line which is flexible and has a small stretchability, and a plurality of elastic lines which are arranged in series and are arranged side by side on the tow line so that the tow line can be tensioned. A traction cable comprising: a plurality of elastic cords having different elastic coefficients, both ends of which are fixed to corresponding portions of the traction cord in a loosened state of the traction cord so that the traction cord is in an extended state. . 2. The tow cable according to claim 1, wherein the tow cable is formed of a long bag-shaped member, and an elastic cable is provided inside the tow cable.