JP3479065B2 - Coupling device for vehicle towing - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is, for example, movement or failure vehicle as part of the road service, the time of removal, etc. of illegally parked vehicle as part of traffic supervision, loading the failure vehicle or the like to the vehicle loading cars The present invention relates to a connecting device for towing a vehicle used at the time.

[0002]

2. Description of the Related Art Since a damaged vehicle or the like is often in a state in which it cannot be self-propelled, when the vehicle is loaded on a vehicle loaded with the vehicle, the footboard for forming a slope from the vehicle loaded vehicle to the ground level is slanted. A method of forcibly pulling a failed vehicle or the like to the bed of the vehicle loaded vehicle along the footboard using a winch is adopted. BACKGROUND ART A vehicle towing coupling device is used as a tool for quickly and reliably coupling a rope such as a wire rope unwound from a winch and a broken vehicle.

[0003] In a conventional vehicle towing coupling device, a pair of brackets facing each other with a certain distance are formed at one end of an arm made of a rigid linear rod or a rectangular rod. At the same time, a through hole for inserting a lock pin or a cord is formed at the other end of the arm (for example, Japanese Utility Model Laid-Open No. 55-71905). In the coupling device shown in the publication, the arm has a linear shape, one end of the arm is provided with a pair of brackets, and the pin holes of the pair of brackets are provided in the horizontal direction. It is characterized in that the through hole at the other end is provided in the vertical direction.

In this coupling device, a pair of brackets on one end side of the arm are positioned so as to sandwich the tow metal fittings at the lower part of the chassis of the towed vehicle from both sides, and lock pins are inserted into the pin holes of the pair of brackets in a barbed shape. Thus, the towed vehicle is connected to one end of the arm, and the through hole at the other end of the arm is positioned so as to match the through hole of the towing hook of the towing vehicle. By dropping the lock pin from above into the through hole of the tow hook, the other end of the arm and the tow vehicle can be connected and used. That is, this coupling device requires that the towing vehicle is a towing vehicle or some 4WD vehicle having a towing hook with up and down lock pins, and therefore its range of use is quite limited. Further, this connecting device can be used by connecting it to a towing vehicle through a rope such as a wire rope through the through hole. Therefore, even when a damaged vehicle or the like is loaded on a vehicle loaded with a winch. Can be used.

[0005]

Such a connecting device for towing a vehicle is devised according to the demand as the absolute number of vehicles increases, and it is convenient to connect the towed vehicle and the towing vehicle easily in a short time. It is a tool, but today, the number of vehicle models that cannot be used has increased due to changes in vehicle design. In other words, it is the fashion of aero design or low-down design that has been promoted by deregulation policy. Aero design vehicles, etc. are characterized by a low vehicle height setting and also equipped with air rectifying plates called lower skirts or under spoilers under the front and rear bumpers. It is not uncommon for an emergency tow metal fitting to be positioned higher than a lower skirt or the like. Therefore, when attempting to pull such an aero-designed vehicle using a conventional connecting device, the intermediate portion of the arm of the connecting device interferes with the lower skirt of the towed vehicle, etc. There is a problem that the cart etc. will be damaged.

Therefore, an object of the present invention is to provide an aero-design vehicle without impairing the functionality of reliably connecting the towed vehicle and the towed vehicle, or the towed vehicle and the winch of the vehicle carrying the vehicle in a short time. Another object of the present invention is to provide a connecting device for vehicle towing that can be used without causing a problem of damage to a lower skirt or the like.

[0007]

According to a first aspect of the present invention, there is provided a connecting device for towing a vehicle in which a towed vehicle is towed by a towing vehicle via an arm. in the device, the arms, with bent molded into a downward convex when connecting the towing vehicle and the towed vehicle through the arm, and the bending mold a
Along the over arm, characterized in that the holes or grooves for coupling the consolidated tool against or pulling vehicle towed vehicle is provided with a plurality. The arm can also be used with its orientation reversed.

According to the present invention, the connecting tool is used to lock the arm to the tow metal of the towed vehicle, and to hook the tow metal of the tow vehicle (tow work machine) so that the tow vehicle (tow work). When the machine is pulled , tension is applied to the arm.
However , since the lower skirt or the like of the towed vehicle is received in the middle portion of the arm that is bent and formed so as to be convex downward, interference between the arm and the lower skirt or the like of the towed vehicle is avoided. In addition, which of a plurality of holes or grooves is used as a locking part,
Alternatively, the posture of the bend-formed arm during the pulling operation differs depending on whether the arm is used as a hook portion . Therefore, by properly using a plurality of holes or grooves, the posture of the arm can be changed according to the height of the lower skirt of the towed vehicle, the condition of the road surface, and the like.

[0009]

[0010]

According to a second aspect of the present invention, there is provided a connecting device for towing a vehicle comprising a rigid arm having a towed vehicle engaging portion at one end and a towing vehicle engaging portion at the other end. In a vehicle towing coupling device for pulling a towed vehicle by the tow vehicle via the arm, the arm is bent so as to be convex downward when the towed vehicle and the tow vehicle are connected via the arm. With this molding
Connect the towing vehicle with a coupler along the curved arm.
The present invention is characterized in that a plurality of retaining holes for the purpose are provided.

According to the present invention, the engaging portion of the arm is engaged with the towing metal fitting on the lower portion of the chassis of the towed vehicle, and the hooking portion at the other end of the arm is engaged with the towing metal fitting of the towing vehicle (towing work machine). When the towing vehicle (towing work machine) is started to pull, tension is applied to the arm, and the arm is connected to the towed vehicle by a locking portion and a towing vehicle by a hooking portion. And are aligned along the pulling direction. At this time, since the lower skirt or the like of the towed vehicle is received in the middle portion of the arm that is bent and formed so as to be convex downward, interference between the arm and the lower skirt or the like of the towed vehicle is avoided. Well
Also, the attitude of the arm should always be such that the towed vehicle
Since the locking part connected to both sides and the hooking part connected to the towing vehicle are determined so as to form a straight line along the towing direction,
The posture of the arm at the time of the pulling operation varies depending on which of the plurality of hanging portions is used. Therefore, by properly using the plurality of hooks, the posture of the arm can be changed according to the height of the lower skirt of the towed vehicle, the condition of the road surface, and the like.

According to a third aspect of the present invention, there is provided a connecting device for towing a vehicle, which is premised on the second aspect of the invention, in which the towed vehicle side of the arm is a locking portion, and the locking portion has a pin hole. When the towed vehicle and the towed vehicle are connected via the arm, the intermediate portion of the arm is provided below the straight line connecting the pin hole of the bracket of the locking portion and the hooking portion for the towed vehicle. Is positioned, and is bent and formed so that there is a clearance between the straight line and the intermediate portion of the arm.

According to the invention, the arms by the start of the pulling operation takes a posture straight line coincides with the pulling direction connecting the hook portion which is consolidated into the pin holes and the traction vehicle of the locking portion. At this time, the middle part of the arm directly connects the pin hole and the hooking part.
Below the line, it is located at a distance escape between the straight line. Therefore, it is possible to avoid interference between the arm and the lower skirt of the towed vehicle within the clearance interval.

[0015]

[0016]

According to a fourth aspect of the present invention, there is provided a connecting device for towing a vehicle, which is based on the second or third aspect of the invention, wherein a part of the arm engaging portion side is bent by the same radius of curvature. It has a stacking structure of variable stacking width made of rigid body, and expands and contracts while maintaining the same radius of curvature.

According to the present invention, it is possible to expand and contract a part of the arm on the towed vehicle side by changing the overlapping width of the portion of the overlapping structure. Since the parts are bent and formed with the same radius of curvature, when the part of the arm is extended, the arm as a whole escapes between the straight line connecting the pin hole of the bracket and the hook and the middle part of the arm. When the shape is changed so as to increase the distance, and when a part of the arm is retracted by changing the overlapping width, the arm as a whole is connected to the straight line connecting the pin hole of the locking portion and the locking portion and the middle portion of the arm. The shape can be changed so as to reduce the clearance distance between them.

According to a fifth aspect of the present invention, there is provided a connecting device for towing a vehicle, which is directed to the side of the arm engaging portion side, on the premise of the invention according to any one of the second to fourth aspects. The slide arm is attached to the arm, and the locking portion is attached to the arm so as to be laterally movable via the slide arm.

According to the present invention, since only the locking portion can be moved to the side of the arm via the slide arm in a state where the arm is positioned at the center position of the towed vehicle, the tow metal fitting is located at the center of the chassis. The towed vehicle not provided at the position can be towed from the central position of the chassis.

The coupling device for a vehicle towing according to claim 6 of the present invention, the premise of the invention as claimed in any one of claims 2 to 5, the locking portion is rotatably provided in the arm It is characterized by being

According to the present invention, for example, when pulling a towed vehicle that has been derailed from an oblique direction, the locking portion is connected by a lock pin in a direction corresponding to the tow metal of the towed vehicle and towed. When operated, the arm takes an oblique posture according to the pulling direction, but since the locking portion is rotatable with respect to the arm, bending stress is not applied to the pulling metal and the arm of the towed vehicle. It is possible to prevent damage to the tow metal fittings and the locking portions of the arms. Here, it is also possible to provide locking means for locking the rotated position of the locking portion.

According to a seventh aspect of the present invention, there is provided a connecting device for towing a vehicle, which is provided with arms which are bent and formed so that both end portions are directed upward and are downwardly convex as a whole, and locking portions, respectively. It comprises a pair of sub-arms having a shape similar to both ends of the, and a connecting member for connecting the arm and the pair of sub-arms, and the sub- arm locking part is a towing metal fitting fixed to the lower part of the chassis of the towed vehicle. It has a pin hole that engages via a lock pin, and the sub-arm supports the locking part at a position higher than both ends of the arm, and is the same as both ends of the arm on the side of both ends of the arm via a connecting member. It is characterized by being arranged in a posture.

According to the present invention, in the whole form of the connecting device for pulling the vehicle, the pair of sub-arms in the separated state are connected laterally to the arm as if only the both ends of the arm are moved in parallel. It will be in the form of being placed side by side. Therefore, one of the locking portions is connected to the towed vehicle and the other locking portion is pulled, so that the pulling force is bypassed between the pair of connecting members and the arm and is transmitted to the other sub-arm. You can work. In the pair of sub-arms, the distance between the straight line connecting the pin holes of the pair of locking portions to each other and the intermediate portion of the sub-arm is substantially infinite. This is because the sub arm has no intermediate portion. Further, when the pair of sub-arms are directly connected to the arm without interposing the connecting member, a locking portion is provided between the straight line connecting the pin holes of the pair of the connecting members and the middle portion of the arm. Since the arm is supported at a position higher than both ends and the arm is bent and formed so as to be convex downward, there is a clearance between the arms, so that interference between the arm and the lower skirt is avoided.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

The connecting device 20 for pulling a vehicle is provided with a locking portion 22 for the towed vehicle C1 at one end of a bent arm 21 and a hooking portion H2 for the towing vehicle C2 at the other end. The towed vehicle C1 and the towed vehicle C2 can be connected (FIG. 1). The towing vehicle C2 is not necessarily a vehicle as long as it has a towing work machine, and may be driven by a caterpillar or a vehicle equipped with a towing work machine.

The arm 21 is made by cutting a thick metal plate having a thickness of 10 to 15 mm so as to have a predetermined profile and has sufficient rigidity (FIG. 2).
The metal plate can be cut beautifully by using a laser cutting machine or a water cutting machine without finishing, but the cut end face may be sanded after the fusing. The locking portion 22 for the towed vehicle C1 is formed by connecting a pair of brackets 22a and 22a with a base plate 22b so as to be in a facing posture in which a constant distance is maintained. However, the pair of brackets 22a, 22a and the base plate 22b
Can also be formed by bending a single metal plate. The locking portion 22 is integrated with the arm 21 by directing the pair of brackets 22a, 22a in the longitudinal direction of the arm 21 and welding the central portion of the back surface of the base plate 22b to the end surface of the arm 21. A pair of brackets 22a, 2
Pin holes H1 and H1 are provided in 2a at the same position in the plate thickness direction of the arm 21. The distance between the pair of brackets 22a, 22a is set so as to receive the tow metal fitting K provided in the lower portion of the chassis S of the towed vehicle C1 between them (FIGS. 1 and 2). The spacing is set to accommodate the largest size tow metal fitting K of a commercial passenger car. Although not shown, a spacer is interposed in the gap generated when the tow metal fitting K is inserted in the space between the pair of brackets 22a, 22a, or the pair of brackets 22a, 22a are configured as separate members so that they can slide with respect to each other. Make up the above-mentioned tow metal fitting K
It is also possible to fill the gap that occurs when the is put.

At the other end of the arm 21, there are hooked portions H2 and H2.
... is provided. Five hook portions H2 are provided as hook holes at equal pitches, but at least one hook portion is sufficient. The five hooking portions H2, H2 ... Are arranged so that the half length of the arm 21 is evenly distributed to the five hooking portions H2, H2. The arm 21 has a hook H
Even when the straight line A connecting 2, 2, H2, ... And the pin hole H1 of the locking portion 22 is used as a reference, it is bent and formed so as to be downwardly convex with respect to the straight line A (FIG. 3A). ，
(B), (C)). The arm 21 does not have a straight part,
Moreover, regarding the curvature of the arm 21 as a whole, the half-length curvature on the side where the locking portion 22 is provided is set to be relatively larger than the half-length curvature on the side where the hooking portion H2 is provided. Here, the pin hole H1 is also a hook portion H2 as a hook hole. As a result, the arm 21 as a whole has a shape in which one end on the side of the locking portion 22 rises upward. The arm 21 is spaced from the locking portion 22 by a certain forward distance D1 when the straight line A connecting the pin hole H1 of the locking portion 22 and the hooking portion H2 at the farthest position is used as a reference. The middle portion of 21 has a portion with the largest clearance D2 ((A) in the same figure). The forward travel distance D1 is calculated from the tow metal fitting K to the bumper B in a commercially available passenger car, which is obtained on average.
1 is the distance to the front end (FIGS. 1 and 3), and the design of the curvature and the forward distance D1 can be changed.

The arm 21 is provided with a lock pin 28 and a shackle fitting 29 for improving convenience in actual use (FIG. 2). The lock pin 28 has a locking portion 2.
The lock pin 28 is a center-folded pin having an outer diameter that fits into the second pin hole H1, and a lock ring 28r is attached to one end of the lock pin 28. The other end of the lock pin 28 is slotted, and a hooking piece 28t that tilts around the pin shaft 28p is attached to the other end. The lock pin 28 is configured such that the latching piece 28t is in a posture parallel to the axis and the locking portion 22
By passing through the pin hole H1 and bending the hooking piece 28t in a direction orthogonal to the axis when it is pulled out to the side opposite to the pin hole H1, a locked state in which it cannot be pulled out from any side can be obtained. The lock pin 28 is a small eye fitting 21 welded to the side surface of the arm 21 near the locking portion 22.
chain 2 for connecting e and the ring 28r of the lock pin 28
It is attached to the arm 21 by 8j.

On the other hand, the shackle fitting 29 is a U-shaped fitting 2
9a and a threaded pin shaft 29b (FIG. 2). A through hole h1 and a screw hole h2 are formed at the ends of the adjacent U-shaped metal fittings 29a.
Positioning is performed such that one of the hooks H2 is sandwiched between the ends of the pin 9a, and the pin shaft 29b is screwed from the through hole h1 side to the screw hole h1.
By screwing into 2, it can be attached to the optional hook portion H2. The shackle metal fitting 29 is for quickly connecting the end of the rope 11 such as a wire rope on which the ice price 11a is formed in advance to the arm 21.
When using the U-shaped fitting 29a, the ice price 11
After passing through a, it will be attached to the arm 21 (FIG. 1). The cord 11 can be directly connected to the hooking portions H2, H2 ....

In the vehicle towing coupling device 20 shown in the above-mentioned embodiment, the towed vehicle C1 such as a broken vehicle is pulled up to the bed of the vehicle to be loaded, which is the towing vehicle C2, through the slope formed by the tread 12. When towing (Fig. 1 (A)) or towing on a road (Fig. 1)
(B)) In addition, it can also be used when pulling up a derailed vehicle (not shown). In any case, the arm 21 includes the towed vehicle C1 and the towed vehicle C2.
It is used so that it becomes convex downward when and are connected.

When using a vehicle loaded with a vehicle, the footboard 1
2 is prepared, and the towed vehicle C1 is towed obliquely upward along the tread 12. In this case, one end of the arm 21 is connected to the tow metal fitting K at the lower part of the chassis S of the towed vehicle C1 via the locking portion 22, and the hooking portion H2 to be used is determined. When the other end of the arm 21 is pulled in the direction of the rope 11 extended from the winch 13 mounted on the vehicle loaded with the vehicle, the posture of the arm 21 is such that the arm 21 and the towed vehicle C1 are used. Between lower skirt B2 etc.
And it determines so that it may have an appropriate gap between the arm 21 and the road surface G. Arm 21 during towing
The posture of (1) is generally such that the straight line A connecting the pin hole H1 of the locking portion 22 and the hooking portion H2 to be used coincides with the pulling direction K1 (FIG. 3).

That is, the following relationship exists between the posture of the arm 21 and the hooking portion H2 used and the pulling direction K1. If the pulling direction K1 is parallel to the road surface G, the arm 2
1 is a straight line A connecting the pin hole H1 and the hook H2 to be used
Is parallel to the road surface G (FIG. 3 (A)), and even if the hooking portions H 2 used are the same, if the pulling direction K1 is an oblique direction, the arm 21 will have a pin hole H1. Hook H2
Take a posture in which the straight line A connecting with is oblique (Fig. 3
(B)). In this case, the clearance distance D2 of the arm 21 at the same forward distance D1 decreases according to the tilted posture of the arm 21. Even if the pulling direction K1 is the same, the posture of the arm 21 changes if the hooking portion H2 used is different (FIG. 3 (C)). In this case, the same forward distance D
The clearance distance D2 of the arm 21 in 1 decreases as the hook H2 used approaches the pin hole H1, and conversely,
Increases with distance. The arm 21 is bent (curved) so as to have a constant clearance D2 even when the hook portion H2 located closest to the pin hole H1 is selected.
It is molded.

The hooking part H2 used in the towing work by the towing work machine takes these relationships and conditions such as the lower skirt B2 of the towed vehicle C1 and the like, the position of the towing metal fitting K, and the inclination of the tread 12 into consideration. Although it is required to be selected, these situation determinations are contents that can be easily sensed by a worker who is accustomed to the work. The posture of the arm 21, which is a rigid body, is
Even if a traction force is applied to 1, the pulling direction K1
The arm 21 does not change unless it is changed or the hook H2 used is changed (hardened).
The lower skirt B2 and the like of the towed vehicle C1 can be received in the middle portion of the vehicle and can be pulled up onto the vehicle carrying the vehicle without damage (FIG. 1 (A)). Also, the towed vehicle C
1 and the towing vehicle C2 are connected via the connecting device 20, and even when the vehicle is towed on the road, the arm 21 is controlled by selecting an appropriate hooking portion H2 and controlling the posture of the arm 21.
It is possible to pull while avoiding the interference between the lower skirt B2 and the like, the arm 21 and the road surface G (see FIG. 1).
(B)).

Other embodiments of the vehicle towing coupling device 20 will be sequentially described below.

The arm 21 can be bent and formed at a certain angle so as to be convex downward with respect to the straight line connecting the pin hole H1 and the hook portion H2 (FIG. 4). Arm 2
1 is composed only of a strip-shaped metal flat plate. The arm 21 welds and joins a metal plate M1 having a large longitudinal dimension and a metal plate M2 having a relatively small longitudinal dimension so as to form an L shape, and sandwiches the joint portion and the short metal plate M2 from the left and right in a pair. The side plates M3 and M3 are welded together. At this time, the ends of the pair of side plates M3, M3 project from the ends of the short metal plate M2, and pin holes H1, H1 are provided in the projecting portions, and as a result, the pair of brackets 2
The locking portion 22 including the 2a and 22a is formed. Further, a hook H2 is provided at the end of the metal plate M1 having a large longitudinal dimension. Depending on the L shape, the arm 21
A straight line A connecting the pin hole H1 and the hook H2 is formed in the middle of
Since a predetermined escape distance D2 can be provided for this, the lower skirt B2 of the towed vehicle C1 and the like can be received in this portion, and the entire material is only a metal flat plate, so low cost is achieved. can do. The intermediate portion of the arm 21 may be bent and formed in an obtuse V shape or an acute hook shape.

The arm 21 may have a structure in which a linear portion and a curved (curved) portion are integrated (FIG. 5). At one end of the curved arm 21,
The locking portion 22 having the pin hole H1 is provided, and
A hook H2 is formed at the other end of the linearly configured arm 21. Also according to this shape, the arm 21 has a clearance D2 below the straight line A connecting the pin hole H1 of the locking portion 22 and the hooking portion H2, and when the arm 21 is connected to the towed vehicle C1, the lower skirt B2 and the like are provided. Can accept.

Here, a roller or caster 27 can be attached to the arm 21 at a position where it may interfere with the road surface G or the tread 12 etc. during the towing operation (FIG. 6). As the caster 27, by using a non-directional caster or a universal caster that can follow the pulling direction of the towed vehicle C1, the effectiveness, that is, the contact with the ground (road surface) and the weight reduction of the pulling can be enhanced. The caster 27 may be attached to the arm 21 via the hinge metal fitting 27b, and may be folded over the arm 21 so as not to hinder the towing work when not in use (shown by a chain double-dashed line in the figure). .

The arm 21 has a structure in which a part of the arm 21 is overlapped, and can be expanded and contracted by adjusting the overlapping width L1 (FIGS. 7 and 8). Arm 21
Is an arm body 21a and a pair of arm pieces 21b, 21b.
And one end of the arm body 21a on the side of the locking portion 22 has a radius of curvature R1 within a range of a central angle of about 100 degrees about a point P1 located within the clearance D2 of the arm 21.
Is formed in an arc shape that keeps the constant. Further, the pair of arm pieces 21b, 21b are formed with the same radius of curvature R1 as one end of the arm body 21a formed in an arc shape on the side of the locking portion 22. The locking portion 22 is a pair of arm pieces 2
The locking portion 22 and the pair of arm pieces 21b and 21b are welded to one end of the 1b and 21b, and are integrated. However, a gap having a width that allows the arm body 21a to be tightly inserted is set between the pair of arm pieces 21b, 21b.

The arm body 21a and the pair of arm pieces 2
Four through holes H3, H3, ... Are formed at equal pitches in the 1b, 21b, respectively. Therefore, four through holes H3, H3 ... Are provided in the arm body 21a and the pair of arm pieces 21b, 21b. When the arm main body 21a is loaded between the pair of arm pieces 21b and 21b and one end of the arm main body 21a and the entire arm pieces 21b and 21b are overlapped with each other, they are correctly aligned with each other. And a pair of arm pieces 21b, 2
1b and arm body 21a are matched with through holes H3, H3
At least two bolts b1 and b1 are passed through ... And tightened with nuts n1 and n1 to integrate them. In such a vehicle towing coupling device 20, the bolts b1 and b1 are pulled out, the arm pieces 21b and 21b are slid, and the bolts b1 and b1 are re-tightened through the through holes H3 and H3 that coincide with each other after sliding, that is, the arm body. 21a and arm piece 21
By changing the overlapping width L1 with b and 21b,
One end of the arm 21 on the locking portion 22 side has the same radius of curvature R1.
Can be maintained and stretched. As a result, it is possible to adjust the clearance distance D2 of the arm 21 so as to suit the situation of the lower skirt B2 of the towed vehicle C1 (FIG. 8).

The clearance D in such an arm 21
The adjustment function 2 can also be achieved by loading the arm body 21a having the box-shaped structure with the arm piece 21b attached with the locking portion 22 so that the arm piece 21b can freely move in and out (FIG. 9). A pair of side surfaces d formed by the same radius of curvature are provided on one end of the arm body 21a on the side of the locking portion 22.
1, d1 and a pair of end faces d2, d2 connected to the pair of side faces d1, d1 are formed into a box-shaped box portion 21d. The pair of side faces d2, d2 have four through holes at equal pitches. H3, H3 ... Are provided. On the other hand, the arm piece 21
b is formed by the same radius of curvature as the side surfaces d2, d2 of the box portion 21d, and the arm piece 21b has through holes H3, H3 ... Corresponding to the side surfaces d1, d1 of the box portion 21d.
Are formed. Further, the cross-sectional shape of the arm piece 21b is set to a shape corresponding to the internal space in the cross section of the box portion 21d, and the arm piece 21b is set to the box portion 21.
It is loaded so that it can be slid inward from the end face of d. And the arm piece 21b and the box portion 21d are
It is fixed by passing at least one bolt or lock pin 28 through the through holes H3, H3 .... Therefore,
The lock pin 28 is pulled out and the arm piece 21b is slid, and at this time, the lock pin 2 is inserted into the matching through holes H3 and H3.
Escape interval D2 of the arm 21 can be easily set by inserting 8
Can be adjusted.

Locking portion 2 for connecting to towed vehicle C1
2 can be rotatably attached to the arm 21 (FIG. 10 (A)). For example, when the locking portion 22 of the vehicle towing coupling device 20 according to the above-described embodiment is rotatable, the locking portion 22 is not directly attached to the arm piece 21b but is attached via the bearing 22f. Bearing 2
A shaft 22g having a thread at its upper end is erected on 2f. In addition, the base plate 22b of the locking portion 22 has a shaft 22g
A center hole h3 corresponding to is formed. The base plate 22b of the locking portion 22 is fitted to the shaft 22g next to the washer, and the nut n2 is hooked via the washer. The split pin 22 for preventing the nut n2 from falling off is attached to the shaft 22g.
The locking portion 22 is assembled in the order in which t is inserted. Since the locking portion 22 is rotatable, there is an advantage that an unreasonable force is not applied to the tow metal fittings K and the like of the towed vehicle even when the towed vehicle that has been derailed is forcibly towed obliquely. Further, lock means Ro for locking the rotated position of the locking portion 22 may be provided (FIG. 10).
(B)). In this locking means Ro, a large number of bolt holes Bb through which the bolt Bo is passed are formed in the locking portion 22 and the bearing 22f on the rotation track of the locking portion 22, and the bolt Bo is passed through the rotation position of the locking portion Ro. Lock. In addition, the bolt hole Bb of the locking portion 22 and the bearing 22f
One of them may be at least one and the other may be formed in large numbers.

The locking portion 22 of the connecting device 20 for pulling the vehicle can be attached to the arm 21 via the slide arm 25 so as to be laterally movable (FIG. 11). The coupling device 20 includes an arm body 21a and four slide arms 2
5 and 25, a pair of arm pieces 21b and 21b, and a locking portion 2
It consists of 2. One end of the arm body 21a on the side of the locking portion 22 and the pair of arm pieces 21b, 21b have the same shape, and the arm body 21a and the pair of arm pieces 21b, 21b should match when the three are superposed. Are provided with four through holes H3, H3 ... Also, 4
Screws are engraved on both ends of the slide arms 25, 25 ... The four slide arms 25, 25 ...
The arm body 21a is slidably inserted into each through hole H3,
The pair of arm pieces 21b, 21b are attached to both ends of the four slide arms 25, 25 with the arm body 21a in the middle and arranged in parallel with the arm body 21a. At this time, each arm piece 21b is attached to each slide arm 2
It is sandwiched between two nuts n5 and n5 screwed to the end of 5 to be firmly fixed, and the locking portion 22 is attached to one of the arm pieces 21b.

The locking portion 22 of this connecting device 20 is
By removing the nuts n5, n5 ... and replacing the arm pieces 21b, 21b from side to side, the arm body 21a can be attached to the left and right sides and the slide arm 25,
Within the sliding range of 25 ..., the locking portion 22 can be swung to the side of the arm body 21a without any step. Therefore,
For example, a towed vehicle C1 in which the tow metal fitting K is offset to the right or left of the chassis is a vehicle loaded vehicle (towed vehicle).
Even when the vehicle is towed up (FIG. 12), it is possible to tow the width center position of the towed vehicle C1, so that the inconvenience caused by directly towing the towed vehicle C1 such as the rope 11 In a vehicle-mounted vehicle of a type in which the position cannot be changed, the rope 11 cannot be wound up neatly around the winch winding cylinder, and the arm 21 interferes with the tread 12. It is possible to avoid the problem that the handlebar of the towing vehicle is cut off following the towing direction and the towed vehicle C2 does not go straight along the treads 12, 12.

The connecting device 20 for towing the vehicle includes a towing metal fitting K.
Is the towed vehicle C1 that is offset to the left or right
Can also be used (see FIG. 1).
3). The coupling device 20 includes an arm 21 formed by bending both ends thereof in the same shape, and a pair of sub-arms 23, 23 formed by bending the both ends of the arm 21 in the same shape.
It is composed of a pair of connecting members 26, 26 connecting the arm 21 and the sub-arms 23, 23. Three through holes H3, H3, ... Are provided at both ends of the arm 21 at equal pitches, and through holes H3, H3 ,.
Are formed. However, one more through hole H3 is provided in the sub arms 23, 23. An engaging portion 22 having pin holes H1 and H1 is integrally formed on the pair of sub-arms 23 and 23, respectively.
Is fixed to the arm 21 via a pair of connecting members 26, 26 in a posture in which only both ends of the arm 21 are moved in parallel to the side of the arm 21.

Each connecting member 26 is composed of three hexagonal headed full screw bolts b2, b2 ...
.. are passed through the corresponding through holes H3, H3 ... of the arm 21 and the sub-arms 23.23, and the nuts n4, n4 ... are tightened to integrally form the arm 21 and the pair of sub-arms 23, 23. It has become. In this state, the pair of sub-arms 23, 23 are in a facing attitude, and the pair of locking portions 22, 22 are supported at a position higher than both ends of the arm 21. Also, the pair of locking portions 2
The straight line A connecting the 2, 22 pin holes H1, H1 is connected to the arm 2
A predetermined clearance distance D2 is set between the straight line A and the intermediate portion of the arm 21 in the case of being assumed above 1. These relationships are also maintained even if the entire coupling device 20 is horizontally rotated 180 degrees and the sub arms 23, 23 are positioned laterally on the opposite side of the arm 21.

The connecting device of this embodiment is used by positioning the arm 21 at the width center side of the towed vehicle C1 regardless of whether the tow metal fitting K of the towed vehicle C1 is offset to the left or right side ( (Fig. 14). The vehicle-loaded vehicle as the towing vehicle C2 shown in the figure is a vehicle of a type in which the position of the tow line 11 can be freely changed. The towed vehicle C1 and the coupling device 20 have a locking portion 22 of one sub-arm 23.
To the lock pin 28, and
The coupling device 20 and the towing vehicle C2 are the other sub-arm 2
It is possible to hook and connect the cord 11 to the lock pin 28 that is passed through the locking portion 22 of No. 3. The rope 11 is positioned in front of the tow metal fitting K so that an unreasonable twisting load is not applied to the tow metal fitting K of the towed vehicle C1. When the towing operation is started in this state, the towed vehicle C1 moves to the treads 12, 1
As it approaches 2, the lower skirt B2 etc. and the tread 1
The gap between 2 and 12 is reduced, but a pair of sub-arms 2
3, 23 are separated and there is no intermediate portion, and the arm 21 passes through the middle of the left and right treads 12, 12, so that the connecting device 20 has all the treads 12, 1.
2 Towed vehicle C1 treads 12, 12 without interfering with 2.
Can be towed up. When the towed vehicle C1 reaches the treads 12 and 12, the front of the towed vehicle C1 rises along the treads 12 and 12, so that the clearance with the lower skirt B2 and the like is restored.

Each of the connecting members 26, 26 in the above embodiment is a connecting plate M made of one thick metal plate.
5, M5 (FIG. 15). A pair of connecting plates M5
M5 has the same length, and each connecting plate M5 is pressed into a curved surface following the shapes of both ends of the arm 21. Then, the arm 21 and the pair of sub-arms 23, 23 are firmly welded to each other via the connecting plates M5, M5. As a result, the distance between the arm 21 and the sub-arms 23, 23 cannot be adjusted, but the rigidity of the coupling device 20 can be significantly increased.

Further, as shown in FIG.
It is also possible to have the wide surfaces 21c at the top and bottom (up and down in FIG. 16) and to make the thickness of the side surface 21s thin. Further, a hook portion H2 for a towing vehicle is provided on the wide surface 21c. In this case, unlike the above-described arm 21 (FIG. 1 and the like), since the wide surfaces 21c are not formed on the left and right side surfaces (left and right in FIG. 16), the wide skirt has a predetermined width, such as lower skirt. This has the advantage of reducing the probability of interference with the arm 21. In addition, in the example shown in FIG. 16, a spring BA for preventing the movement of the lock pin 28 is attached.

Further, as shown in FIGS. 17 to 19, the arm 21 can be used with its direction reversed.
Here, the U-shaped tow metal fitting K is not such that the left and right ends of the U-shape are arranged vertically as described above, but at the same height position as the front lower arm LA of the towed vehicle C1,
In other words, the description will be given assuming that they are mounted horizontally.
In addition, the arm 31 shown in FIG. 17 has a connection opposite to that of the arm 21, and the plurality of hook portions H2 are groove-shaped,
That is, it is formed in the shape of a notch. Here, only the uppermost cutout groove-shaped hooking portion H3 of the arm 31 is provided with the closing member J for closing it, but the other hooking portions are similarly formed in the cutout groove shape. Then, the closing member J may be provided. By providing this closing member J, it is possible to prevent the hooking portion H3 of the arm 31 from coming off the pulling metal fitting K2 during the connecting work. Further, the hooking portion H3 can be the hooking hole H2 as described above (in FIG. 17, only the front lower arm LA side is notched groove-like,
All of them may be cutout grooves. ), In this case, a connecting tool (reference numeral 29) which can be hooked on the horizontal U-shaped tow metal fitting K.
Etc.). On the other hand, the other end of the arm 31 has a pair of brackets 22 having pin holes H1 and H1.
Although the a and 22a are attached, as shown in FIG. 18, the cutout groove-shaped hooking portions H3 and the hooking holes H2 are provided at predetermined intervals over the entire length of the arm 31, and the shackle metal fitting 29 is provided. It may be connected via a connecting tool such as the lock pin 28. That is, the arm 21 or the arm 31 of the present invention may be bent and formed so as to be convex downward when the towed vehicle C1 and the towed vehicle C2 are connected via the arms 21 and 31, and The hook portions H3 and the hook holes H2 are provided at predetermined intervals over the entire length of the arm 31,
You may connect through a connection tool.

Next, when the tow vehicle K1 is not attached with the tow metal fitting K, it is preferable to use the attachment metal fitting K2 as shown in FIG. The attachment metal fitting K2 is a long metal member having a U-shaped hooking claw 32 on the tip side, and a shackle metal fitting 29 is attached to the other end. Although the number of attachment fittings K2 shown in FIG. 20 is two, it may be more or one. Then, the U-shaped hooking claw 32 of the attachment fitting K2 is hooked and fixed to the front lower arm LA. The arm 31
Has a connection opposite to that of the arm 21, and when connecting with the attachment fitting K2, the shackle fitting 2
9 and lock pin 28 are used. Shackle metal fittings 29
Are used to connect the lock pin 28 with the arm 21 and the arm 31 in which the notch groove-shaped hooking portion H3 is formed. Here, the case of using the reverse arm 31 will be described. The shackle fitting 29 with the lock pin 28 released is passed through the hook hole H3 of the arm 31, and the lock pin 28 is attached to the attachment fitting K2.
It is fixed to the shackle metal fitting 29 after passing through the insertion hole.
When connected and fixed in this way, the towing vehicle C2 is attached to the tow metal fitting K.
Even when the towed vehicle is not attached, the towed vehicle C1 and the winch of the vehicle to be loaded can be reliably connected while avoiding interference between the arm 31 and the lower skirt of the towed vehicle C1. The other end of the arm 31 can be in any of the connected states of the above-described embodiments.

[0052]

According to the coupling device for towing a vehicle of the present invention, a rigid arm having a towed vehicle locking portion at one end and a towing vehicle hooking portion at the other end is used as a towing vehicle. Since it is formed by bending so that it becomes a downward convex when connecting the towing vehicle with the towing vehicle, even if the towed vehicle is a low-down design vehicle or an aerodesign vehicle, the arm of the vehicle bends downward in the arm. By accepting the lower skirt or the like, it is possible to avoid the lower skirt or the like and the arm from interfering with each other, and thus it is possible to perform the pulling operation without damaging the lower skirt or the like.

[0053]

[Brief description of drawings]

FIG. 1 is a diagram illustrating a usage state of an embodiment of the present invention.

FIG. 2 is a perspective view of the above embodiment.

FIG. 3 is an operation explanatory diagram in the above embodiment.

FIG. 4 is a perspective view showing another embodiment of the present invention.

FIG. 5 is an explanatory diagram of a usage state showing another embodiment of the present invention.

FIG. 6 is an explanatory diagram of a usage state showing another embodiment of the present invention.

FIG. 7 is a perspective view of a main part showing another embodiment of the present invention.

FIG. 8 is an explanatory diagram of operations in the above embodiment.

FIG. 9 is a perspective view of a main part showing another embodiment of the present invention.

FIG. 10 is a cross-sectional view of the main parts showing another embodiment of the present invention.

FIG. 11 is a perspective view of a main part showing another embodiment of the present invention.

FIG. 12 is an explanatory diagram of a usage state in the above embodiment.

FIG. 13 is a perspective view showing another embodiment of the present invention.

FIG. 14 is an explanatory diagram of a usage state in the above embodiment.

FIG. 15 is a perspective view showing another embodiment of the present invention.

FIG. 16 is a perspective view showing another embodiment of the present invention.

FIG. 17 is an explanatory diagram showing a usage state of the above embodiment.

FIG. 18 is an explanatory diagram showing a usage state of the above embodiment.

FIG. 19 is a perspective view showing another embodiment of the present invention.

FIG. 20 is a perspective view showing a usage state of another embodiment of the present invention.

[Explanation of symbols]

A straight line (a straight line connecting the hook portion for a pin hole of the bracket engaging portion towing vehicle) S chassis K, K2 towing bracket C1 towed vehicle C2 towing vehicle (towing machine) H1 pin hole (engaging portion ) H2 hooking part (hooking hole) H3 hooking part (hooking groove) D2 clearance gap R1 radius of curvature Ro locking means L1 stacking width 20 connecting device 21 arm 22 locking part 23 sub arm 22a bracket 25 slide arm 26 connecting member 28 Lock Pin

Claims (7)

(57) [Claims] 1. A connecting device for towing a vehicle, in which a towed vehicle is towed by an towing vehicle via an arm, wherein the arm is convex downward when the towed vehicle and the towed vehicle are connected via the arm. Bending is performed like this, and along the bend-formed arm, for towed vehicles
Alternatively, there is provided a plurality of holes or grooves for connecting the connecting member to the towing vehicle, and the connecting device for towing the vehicle. 2. The towed vehicle is towed by the towed vehicle through an arm having a rigid arm having a towed vehicle locking portion at one end and a towed vehicle hooking portion at the other end. In a connecting device for towing a vehicle, the arm is bent and formed so as to form a downward convex when the towed vehicle and the towed vehicle are connected via the arm, and the towed vehicle is provided along the bent arm. Concatenate
A connecting device for towing a vehicle, wherein a plurality of hook holes for connecting with a tool are provided. 3. The towed vehicle side of the arm is a locking portion,
The locking portion is provided with a bracket having a pin hole, and when the towed vehicle and the towing vehicle are connected via an arm, the pin hole of the bracket of the locking portion and the hooking portion for the towing vehicle are connected. 3. The connecting device for vehicle towing according to claim 2, wherein an intermediate portion of the arm is located below the straight line, and is bent and formed so as to form a clearance between the straight line and the intermediate portion of the arm. 4. A part of the arm on the side of the locking portion has a stacking structure of variable stacking width made of a rigid body bent and molded with the same radius of curvature, and expands and contracts while maintaining the same radius of curvature. The connecting device for towing a vehicle according to claim 2 or 3 . 5. The vehicle according to claim 2 , wherein a slide arm is attached to a side of a locking portion of the arm toward a side, and the locking portion is attached to the arm so as to be laterally movable via the slide arm. Connecting device for towing. 6. Any of claims 2 to 5 the locking portion, characterized in that it is provided rotatably in the arm
The connecting device for towing a vehicle according to item 1 . 7. An arm bent at both ends so as to be convex downward as a whole, and a pair of sub-arms each having a locking portion and having a shape similar to the both ends of the arm, And a pair of sub-arms that connect the sub-arms with each other. The sub- arm locking portion has a pin hole that engages with a towing metal fitting fixed to the lower portion of the chassis of the towed vehicle via a lock pin. The sub arm is
A connecting device for towing a vehicle, in which a locking portion is supported at a position higher than both ends of an arm and is arranged laterally to both ends of the arm via a connecting member in the same posture as both ends of the arm.