JP2554508Y2 - Traction cable - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a towing cable suitable for towing a vehicle or the like.

[0002]

2. Description of the Related Art Hitherto, as a tow cable used for towing a vehicle or the like, a wire rope, a synthetic rope, or the like having eyes formed at both ends and a hook member fixed thereto has been widely used. However, in the above-mentioned traction cable, when the traction cable shifts from a slack state to a tensioned state, a large traction load acts on the towed vehicle suddenly, giving anxiety and discomfort to the driver. There was a problem.

Therefore, in order to reduce the impact at the time of towing, a large number of elastic cords made of rubber thread are arranged in parallel with a long towing cord which is flexible and hardly extends, and tensions the towing cord. Connect both ends of the elastic cable to both ends of the towed cable with the towed cable loosened so that the elastic cable can be stretched in the state of being stretched, and reduce the impact during towing by the energy absorption effect of the elastic cable elongation The traction cable configured as described above has been put to practical use.

[0004]

However, in the above-mentioned traction cable, since the impact is reduced by one elastic cable, when the elastic coefficient of the elastic cable is small, a traction load starts to act on the traction cable. Although it is possible to effectively absorb the impact at times, there is a problem that the impact at the time when the towing line is in a tensioned state cannot be effectively absorbed.
If the elastic modulus is large, it can effectively absorb the impact when the towline is in tension, but cannot absorb the impact when the load starts to act on the tow cable. doing. For this reason, even when the elastic coefficient of the elastic cable is set to an optimum value, both the shocks when the tow cable starts to act on the tow cable and when the tow cable is in a tension state are both absorbed to a satisfactory extent. I couldn't do that.

An object of the present invention is to provide a stretchable traction cable which can reduce the impact at the time of traction and can be smoothly towed and does not loosen.

[0006]

According to a first aspect of the present invention, there is provided a tow cable comprising a long bag-shaped member capable of being deformed in a bellows shape and contractable in a longitudinal direction, and an elastic cable connected in series. A plurality of stretchable elastic cables having different coefficients, each of which is fixed to a corresponding portion of the tow line so that the stretch line is installed inside the tow line and stretched when the tow line is tensioned. With ropes.

[0007]

In the traction cable according to the first aspect, a plurality of elastic cables having different elastic coefficients are arranged in series and are installed in a long traction cable, and both ends of the plurality of elastic cables are connected to the traction cable. The towed ropes are fixed to the corresponding parts of the towline so that they are in an extended state while being tensioned, and when no tow load is applied to the towline, the elastic ropes contract and Then, the towing line is deformed in a bellows shape and contracted in the longitudinal direction. On the other hand, when a towing load is applied to the tow line, the elastic line with a small elastic coefficient firstly elongates, and the corresponding tow line portion becomes tensioned. At this time, the elastic line with a large elastic coefficient elongates somewhat according to the tow load. However, the tow line hardly extends until the tow line becomes tensioned, and when a larger towing load is applied, the elastic line with a large elastic modulus also elongates and the corresponding tow line becomes tense, and the entire tow line becomes taut. The vehicle is towed in the state.

[0008] As described above, since the elastic cable having a small elastic coefficient sequentially extends from the elastic cable having a small elastic coefficient and the entire tow line is in a tension state and the tow load is received, the tow cable is pulled by the elastic cable having a small elastic coefficient. The impact at the time when the load starts to act is effectively absorbed, and the impact at the time of towing is effectively absorbed by the elastic cable having a large elastic coefficient, when the towing line is in a tension state. It will be greatly reduced.

Further, since the elastic cable is provided in the long bag-shaped towing cable, the appearance of the towing cable can be improved and the elastic cable can be prevented from being damaged.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a traction cable 1 is composed of a traction cable 2 formed by weaving strong chemical fibers or the like into a long tubular shape.
A pair of hook members 3 attached to both ends of the towing line 2
And a buffer means 4 provided inside the towing line 2.
Note that, instead of the hook member 3, eyes may be formed at both ends of the towing line 2.

At the base end of the hook member 3, a lever member 5 for retaining is rotatably mounted.
Is always urged to a locking position shown in FIG. 4 by a spring member (not shown), and the traction cable 1 moves the hook member 3 to a proper position in the vehicle while rotating the lever member 5 against the urging force of the spring member. And hooked to the vehicle.

The buffer means 4 is for buffering an impact at the time of towing. As shown in FIGS. 1 to 5, a first elastic cable 6 and a second elastic cable 7 are provided in the towing cable 2. The first elastic cable 6 is accommodated in series, the first elastic cable 6 is composed of one unit elastic cable 8 in which a number of thread rubbers are bundled, and the second elastic cable 7 is connected to the first elastic cable 6.
The elastic modulus of the second elastic cord 7 is set to twice the elastic modulus of the first elastic cord 6. The elastic coefficient of the second elastic rope 7 may be set to be larger than that of the first elastic rope 6 by changing the thickness of the rubber thread or the material of the rubber thread. The ratio of the elastic coefficient between the first elastic cable 6 and the second elastic cable 7 is appropriately set according to the maximum towing load. The length ratio between the first elastic cable 6 and the second elastic cable is also set appropriately according to the load application.

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

A portion of the tow line 2 corresponding to the first elastic line 6 is formed with a first expandable and contractible portion 13 which is folded in a bellows shape in a state where no tow load is applied, and a second elastic line. A portion of the tow line 2 corresponding to 7 is formed with a second elastic portion 14 that is folded in a bellows shape in a state where no tow load is applied.

Next, the operation of the traction cable 1 will be described. When the hook member 3 is engaged with the vehicle and the faulty vehicle or the like is towed, first, as shown in FIG.
By the shock absorbing effect of the elastic cable 6, the shock when the traction load starts to act on the traction cable 1 is effectively absorbed,
Next, as shown in FIG. 7, the second elastic rope 7 extends until the second elastic part 14 is in a tension state, and the impact when the towing rope 2 is in a tension state is effectively absorbed, The faulty vehicle is towed in a state where both the elastic portions 13 and 14 are in a tension state. However, while the first elastic portion 13 is in a tension state, the second elastic cable 7 also slightly extends, but since the elastic coefficient of the second elastic cable 7 is set to be larger than that of the first elastic cable 6, The impact when the traction load starts to act is mainly absorbed by the first elastic rope 6.

In the present embodiment, the shock at the time of towing is absorbed by two sets of elastic cables 5 and 6 having different elastic coefficients. The impact at the time of towing may be absorbed. Further, although the unit elastic cable 8 in which a large number of thread rubbers are bundled is used as the elastic cables 5 and 6, an elastic cable in which a tube-like, band-plate-like, or columnar rubber member is bundled alone or in a plurality of bundles may be used. Alternatively, an elastic cable made of a tension coil spring may be used. The towing line 2 may be made of a somewhat elastic material to absorb the impact during towing more finely. The hook member 3 may have a different shape, or both ends of the traction cable 1 may be formed in a ring shape without attaching the hook member 3.

Incidentally, a waterproof coat may be applied to the inner surface of the towing line 2 to enhance the durability of the buffering means 4.
Further, the towing line 2 may be made of a chemical fiber impregnated with a fluorescent color paint or the like, so that the safety of the towing operation at night can be enhanced. In this embodiment, the present invention is applied to the traction cable 1 of the vehicle, but the present invention can be similarly applied to traction cables other than the vehicle.

[0018]

According to the traction cable according to the first aspect,
With a simple structure of providing multiple elastic cables with different elastic coefficients, both when the tow cable starts to apply a tow load and when the tow cable becomes taut, both impacts are reduced and smooth towing is performed. And the driver can be prevented from feeling uneasy or uncomfortable. Further, with a simple structure in which the elastic cable is provided inside the tow cable, the appearance of the tow cable can be improved, and the elastic cable can be prevented from being damaged.

[Brief description of the drawings]

Fig. 1 Side view of traction cable

Fig. 2 Bottom view of the traction cable

FIG. 3 is a perspective view of a buffer means.

FIG. 4 is a side view of a notch near a hook member.

FIG. 5 is a cutaway side view of a main part near the connecting band.

FIG. 6 is an explanatory view of the operation of the traction cable when the first telescopic portion is in a tension state.

FIG. 7 is an explanatory view of the operation of the traction cable when both the expansion and contraction parts are in a tension state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Towing cable 2 Towing rope 3 Hook member 3a Ring part 4 Buffering means 5 Lever member 6 First elastic rope 7 Second elastic rope 8 Unit elastic rope 8a Eye part 9 Connecting band 10 Fixed part 11 Fixed band 12 Fixed part 13 First Telescopic part 14 Second telescopic part

Claims (1)

(57) [Scope of request for utility model registration] 1. A tow line formed of a long bag-shaped member that can be deformed in a bellows shape and contracted in a longitudinal direction, and a plurality of elastic lines that are connected in series and that can be extended and contracted with different elastic coefficients. A plurality of elastic cables, both ends of which are fixed to corresponding portions of the tow line so that the tow line is stretched in a state in which the tow line is tensioned. .