JP3388036B2 - Mobile vehicle traction device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile vehicle having a pair of left and right wheels at a front portion and a rear portion, such as a passenger car or a truck, which is towed by a mobile vehicle having drive wheels. Regarding towing equipment.

[0002]

2. Description of the Related Art As a traction device of this type, conventionally,
A tow platform with grounding wheels is connected to the rear of the moving vehicle, and the towed object is completely placed on the tow platform for transportation, or a hanging device such as a crane is provided at the rear of the moving vehicle. There is known a type in which the front part or the rear part of the towed object is suspended by this crane or the like, and only the rear wheel or the front wheel of the towed object is grounded and conveyed.

[0003]

However, in the type in which the towed object is completely placed on the tow table and conveyed, the work of loading and unloading the towed object on the tow table is difficult, and a special jack is required. It is necessary to load and unload a device, manually move a towed object, and in a passenger car, etc., there is a drawback that the loading and unloading work becomes complicated.

A simple type of this loading / unloading operation is a type of suspending and transporting towed objects.
However, this type of thing requires a fairly heavy crane at the rear of the moving vehicle, and in addition to that,
Since the weight of the towed object that was suspended will also be applied to this crane, a considerable weight will be applied to the rear of the moving vehicle,
A moment acts to lift the front part of the moving vehicle. Therefore, it is necessary to make the moving vehicle itself large and heavy, or to provide a balance weight in the front part of the moving vehicle, and there is a tendency that the moving vehicle itself becomes large. ,
There was a drawback that it was not possible to reduce the weight.

The present invention solves the above-mentioned drawbacks of the prior art, and its purpose is to relatively easily load and unload towed objects and to make the moving vehicle itself relatively small and lightweight. It is to provide a traction device.

[0006]

In order to achieve this object, a first characteristic configuration of a traction device for a moving vehicle according to the present invention is a moving vehicle having driving wheels, wherein a pair of left and right wheels are provided at a front portion and a rear portion. A towing device for a moving vehicle that pulls and conveys a towed object having: a towing base swingable around an axis extending substantially in the lateral direction of the moving vehicle, connected to the rear part of the moving vehicle, A grounding wheel is provided at the bottom of the towing base,
A jack mechanism having a holding member for contacting and holding the lower surface of the front portion or the rear portion of the towed object is provided on the upper part of the towing base, and the drive wheels of the moving vehicle are provided on the rear side of the moving vehicle, and A jack mechanism is provided on the front side of the grounding wheel of the towing base, and the grounding wheel is a caster type.
It is configured as a grounding wheel of the
Through the horizontal axis located in front of the drive wheels,
Note that the towing base is located around the axial center of the moving vehicle, which extends substantially in the lateral direction.
The point is that they are swingably connected .

A second characteristic configuration is such that the towing base having the jack mechanism can be inserted between a pair of left and right wheels at the front or rear of the towed object while the jack mechanism is contracted. In point.

A third characteristic configuration is that the holding member is configured to be rotatable with respect to the towing base about an axis extending substantially vertically.

According to a fourth characteristic construction, the jack mechanism is provided so as not to be rotatable with respect to the towing base, and the holding member is rotatable with respect to the jack mechanism about an axis extending substantially in the vertical direction. There is a point.

[0010]

A fifth characteristic configuration is that the moving vehicle is an automatic traveling type moving vehicle that automatically travels the towed object along a predetermined path extending between a towed object loading position and a towed object lowering position. It is in.

A sixth characteristic configuration is a power receiving coil for generating electric power in the automatic traveling vehicle by a magnetic field formed by a power feeding line arranged along the predetermined path, and the power receiving coil. Control means for controlling the drive of the drive wheels by the electric power from

[0013]

According to the first characteristic construction of the present invention, the tow table is connected to the rear part of the moving vehicle having the drive wheels, and the upper part of the tow table is brought into contact with the lower surface of the front part or the rear part of the towed object. Since the jack mechanism having the holding member for holding is provided, the holding member is brought into contact with the lower surface of the towed object and the front or rear portion of the towed object is lifted by the jack mechanism, and the object to be moved by the moving vehicle is simply moved. The towed object can be towed and conveyed, and conversely, the towed object can be lowered by contracting the jack mechanism, and the towed object can be loaded and unloaded relatively easily. Moreover, since the grounding wheel is provided below the towing base, and this towing base is swingably connected about the axial center substantially along the lateral width direction of the moving vehicle, the towed object lifted by the jack mechanism is pulled. Most of the weight of the object is supported by the tow platform, but since this tow platform can swing around the axis along the lateral direction with respect to the moving vehicle, an attempt is made to lift the front part of the moving vehicle. The acting moment does not work much. Therefore, it is not necessary to provide a heavy balance weight on the front portion of the moving vehicle, and the moving vehicle can be made relatively small and lightweight. further,
Since the drive wheels of the moving vehicle are provided on the rear side of the moving vehicle and the jack mechanism is provided on the front side of the grounding wheels of the towing base, the weight of the jack mechanism due to lifting of the towed object is reduced by the moving vehicle. Not only can the driving wheel and the grounding wheel of the towing base be shared and held stably, but the grounding pressure of the driving wheel can be increased, thereby improving the traction force by the moving vehicle. That is, as described above, it is possible to reduce the size and weight of the moving vehicle itself. However, if the weight is too light, the ground pressure of the drive wheels may be reduced, and the desired traction force may not be obtained. By positively acting the weight of the towed object on the drive wheels, it is possible to reduce the size and weight of the moving vehicle without such a fear. Moreover, the grounding wheels of the towing base
Since this is a caster-type grounding wheel,
Even though some weight acts on the ground wheels, this
It is possible to improve the followability of the towing platform for moving vehicles.
Can pull and tow the towed object well.
It

According to the second characteristic configuration, the towing table having the jack mechanism can be inserted between the pair of left and right wheels at the front or rear of the towed object while the jack mechanism is contracted. Therefore, the towed object can be loaded / unloaded only by the jack mechanism of the towing base, and the towed object can be loaded / unloaded more easily and quickly.

According to the third characteristic configuration, since the holding member is configured to be rotatable about an axis extending substantially vertically with respect to the towing base, the holding member is provided on the lower surface of the towed object. When the moving vehicle bends and changes direction when being pulled and conveyed with the front part or the rear part abutted against the vehicle, the towed object grounding the rear wheel or the front wheel is held by the holding member. Since it is possible to follow the moving vehicle satisfactorily by the rotation of, the towing and carrying of the towed object can be smoothly and smoothly carried out even in the case of a curve.

According to the fourth characteristic configuration, the jack mechanism is provided so as not to be rotatable with respect to the towing base, and the holding member is rotatable with respect to the jack mechanism about an axis extending substantially in the vertical direction. Since it is configured, it is possible to simplify the structure of the jack mechanism and the structure for mounting the jack mechanism on the towing base. That is, with regard to the structure in which the holding member is rotatable with respect to the towing base, it is possible to rotate the holding member with respect to the towing base by rotating the entire jack mechanism, for example. However, in this case, in order to make the relatively heavy jack mechanism turnable, a slightly larger bearing is needed, and the structure of the towing base becomes complicated accordingly, which is a structural disadvantage. The structure can be simplified without any fear.

[0017]

According to the fifth characteristic configuration, this moving vehicle is configured as an automatic traveling vehicle which automatically travels along a predetermined path extending from the towed object loading position to the towed object lowering position. Therefore, it is ideal for an autonomous mobile vehicle that wants to be as compact and lightweight as possible.

According to a sixth characteristic configuration, in the automatic traveling vehicle, a power receiving coil for generating power by a magnetic field formed by a power feeding line arranged along the predetermined path, and the power receiving coil. Since the control means for controlling the drive of the drive wheels by the electric power from the vehicle coil is provided, continuous running is possible even if the battery mounted in the moving vehicle is small, and the moving vehicle is further reduced in size and weight. can do.

[0020]

As described above, according to the first characteristic structure, the jack mechanism provided on the towing base can be used to relatively easily load and unload the towed object, and the jack mechanism is also provided. Despite the fact that the tow platform supports the weight of the towed object lifted by, the moment to lift the front part of the moving vehicle does not act so much, and the moving vehicle can be made relatively small and lightweight. It will be possible. Furthermore, by positively acting the weight of the towed object on the drive wheels, the towed object can be made stable, and the ground pressure of the drive wheels can be increased to reduce the size and weight of the moving vehicle. not, when can improve the traction of the transport vehicle together
In addition, the followability of the towing platform is improved to pull and carry the towed object.
Good delivery is possible.

According to the second characteristic configuration, the towing base having the jack mechanism can be inserted below the towed object in a state where the jack mechanism is contracted, and the work of loading and unloading the towed object is further facilitated. It can be done quickly and quickly.

According to the third characteristic configuration, the holding member for holding the towed object is made rotatable about the axis centered substantially vertically with respect to the towing base, so that the towed object can be moved with respect to the moving vehicle. The followability is improved, and even when the vehicle is curved, it is possible to smoothly pull and convey the towed object.

According to the fourth characteristic configuration, the structure of the jack mechanism or the towing base of this jack mechanism is changed by rotating only the holding member instead of rotating the entire jack mechanism with respect to the towing base. The mounting structure of can be simplified.

[0024]

According to the fifth characteristic constitution, by constructing this moving vehicle as an automatic traveling type moving vehicle, it is possible to provide an ideal automatic traveling type moving vehicle which is desired to be reduced in size and weight. it can.

According to the sixth characteristic configuration, the automatic traveling type mobile vehicle is provided with the control means for controlling the drive of the power receiving coil and the drive wheels, so that the battery mounted on the mobile vehicle can be miniaturized. Therefore, the moving vehicle can be made smaller and lighter.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a towing device for a mobile vehicle according to the present invention will be described with reference to the drawings. FIG. 1 is a side view of the whole, and FIG. 2 is a plan view of the whole.
In the lower part of the wheel, there are a caster-type grounding wheel 2 and a pair of left and right drive wheels 3 which are rotatable about an axis along the vertical direction, with the grounding wheel 2 in the front part and the drive wheel 3 in the rear part. The moving vehicle 1 is equipped with a drive motor 3a for rotating and driving the pair of left and right drive wheels 3 separately, and between the moving vehicle 1 and the ground wheel 2. Although not shown in the drawing, a spring is interposed to prevent the grounding wheel 2 from rising by elastically pressing the grounding wheel 2 downward. A tow base 5 is connected to a rear portion of the mobile vehicle 1 via a horizontal shaft 4 located immediately above the drive wheels 3 so as to be swingable around an axis P substantially along the lateral width direction of the mobile vehicle 1. ,
A caster-type grounding wheel 6 that is rotatable around an axis along the vertical direction is provided at the lower rear portion of the towing base 5.

A jack mechanism 7 is provided on an upper part of the towing base 5 in front of the grounding wheel 6, and the jack mechanism 7 includes a jack body 7a and a towing base 5 as shown in FIG. A pair of left and right first links 8a that pivotally connect the two to each other, and a pair of left and right second links 8b that also pivotally connect the jack body 7a and the towing base 5 to each other. A pair of left and right hydraulic cylinders 9 are interposed between the extension part extending from the second link 8b and the towing base 5, and by expanding and contracting both hydraulic cylinders 9, the jack main body 7a is substantially parallel. It is configured so that it can be vertically moved up and down. The upper surface of the jack body 7a comes into contact with the lower surface of the towed object 10, and the jack body 7a is lifted to lift the towed object 10.
Is provided with a holding member 11 for lifting and holding the front portion or the rear portion of the holding member. The holding member 11 is configured to be rotatable about an axis Q substantially along the vertical direction with respect to the jack body 7a, and the holding member is also provided. A spring 11a is interposed between the jack 11 and the jack body 7a to elastically return to the original position.

The towed object 10 has a pair of left and right wheels 10a at a front portion and a rear portion, as shown by phantom lines in FIG.
In the completed passenger vehicle having 10b, in the grounded state of the passenger vehicle 10 as the towed object, in the state where the towing base 5 including the jack mechanism 7 contracts the jack mechanism 7,
It is configured so that it can be inserted below the passenger vehicle 10 from between the pair of left and right front wheels 10a or between the rear wheels 10b. Therefore, the jack mechanism 7 is contracted and the passenger vehicle 10
, And then the hydraulic cylinder 9 is extended to raise the jack mechanism 7 to bring the holding member 11 into contact with the lower surface of the front portion or rear portion of the passenger vehicle 10, and the rear portion or front portion of the passenger vehicle 10. When the passenger car 10 is lowered, the hydraulic cylinder 9 which is extended in the opposite direction is contracted and the jack mechanism 7 is contracted, so that the passenger car 10 can be easily lifted from the tow platform 5. Can be lowered.

A hydraulic pump 9a for actuating the hydraulic cylinder 9 of the jack mechanism 7 and a pump motor 9b for actuating the hydraulic pump 9a are also mounted on the moving vehicle 1 side. The drive motor 3a is configured to be entirely driven by electric power from a battery 12 mounted on the mobile vehicle 1 and managed and controlled by a control means (not shown) provided in the mobile vehicle 1. Electric power is supplied to the battery 12 by the moving vehicle 1
Is performed by the power receiving coil 13 provided in the lower center part of the. A holding frame 13a for holding the power receiving coil 13
As shown in FIG. 3, the wheel 1 is attached to the lower part of the moving vehicle 1 via a pair of left and right links 14a and 14b located at the front and rear so as to be vertically movable.
5 is provided, and this holding frame 13a is
It is elastically pressed downward by a spring 16 interposed between a and the moving vehicle 1, so that the distance between the power receiving coil 13 and the ground G is always substantially constant regardless of the unevenness of the ground G. Is configured to maintain.

As shown in FIG. 5, for example, the towing device for such a moving vehicle 1 is used in a passenger car assembly plant or the like to load the completed passenger vehicle 10 after the final inspection from the towed object loading position A. It is used when the object is towed to the towed object lowering position B and conveyed. Therefore, between the towed object loading position A and the towed object lowering position B, the feeder line that generates a magnetic field by passing an alternating current is buried in the ground G, and the moving vehicle 1 automatically travels. Path L is formed.

On the other hand, on the side of the moving vehicle 1, a steering sensor 17a for detecting a deviation in the lateral direction of the moving vehicle 1 with respect to the path L is provided at the lower front portion thereof.
The pair of left and right drive wheels 3 are rotationally driven based on the detection result of a, and the moving vehicle 1 is automatically driven along the path L while being steered by the rotation difference between the left and right drive wheels 3 as necessary. . In this case, since the horizontal shaft 4 connecting the towing base 5 is located immediately above the drive wheels 3, the weight of the passenger vehicle 10 acts on both drive wheels 3 and the ground pressure of the drive wheels 3 increases, and both drive wheels 3 drive. Not only can the traction force by the wheels 3 be improved, but also steering due to the difference in rotation between the two drive wheels 3 can be performed well.

During the automatic running, the power receiving coil 13 generates electric power in the magnetic field formed by the power supply line and supplies the electric power to the battery 12 while driving the drive motor 3a and the like. The moving vehicle 1 is also capable of moving backward, and in that case, the steering sensor 17b provided at the lower rear portion of the towing base 5 detects a lateral shift of the moving vehicle 1 with respect to the guide line.

[Other Embodiments] In the previous embodiment, the battery 12 is mounted on the moving vehicle 1, but it is possible to always generate power in the power receiving coil 13 by the magnetic field of the power supply line. The battery 12 may be omitted, or conversely, the power receiving coil 13 and the power supply line may be omitted, and the driving motor 3a and the like may be driven only by the battery 12 mounted on the mobile vehicle 1. You can also do it. Further, the moving vehicle 1 is not limited to the automatic traveling type, but can be applied to a moving vehicle in which an operator travels.

The towed object 10 is not limited to a completed passenger car, but may be an unfinished passenger car or various vehicles other than passenger cars as long as it has wheels 10a and 10b. In addition, it can be widely applied to towing and carrying various articles other than vehicles, for example, heavy articles having a pair of left and right moving wheels at the front and the rear.

Further, in order to increase the ground pressure of both the left and right driving wheels 3, the structure in which the horizontal shaft 4 connecting the towing base 5 is located immediately above the driving wheels 3 is shown, but the driving wheels 3 are not always required.
It is not necessary to be directly above, and the ground pressure of the drive wheel 3 can be increased even if the horizontal shaft 4 is located on the front side of the drive wheel 3.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a side view of a towing device for a mobile vehicle.

FIG. 2 is a plan view of a towing device for a mobile vehicle.

FIG. 3 is a side view showing a main part of a towing device for a moving vehicle.

FIG. 4 is a side view showing a main part of a towing device for a moving vehicle.

FIG. 5 is a schematic plan view showing a transportation path of a moving vehicle.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Mobile vehicle 3 Driving wheel 4 Horizontal shaft 5 Traction stand 6 Grounding wheel 7 Jack mechanism 10 Towed object 10a Towed object wheel 10b Towed object wheel 11 Holding member 13 Power receiving coil A Towed object loading position B Towed object Product unloading position L Path P Axial axis along the lateral width Q Axial axis along the vertical direction

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification symbol FI B61B 13/00 B60D 1/14 A B61G 1/00 (56) References JP-A-57-172883 (JP, A) JP-A-SHO 60-47747 (JP, A) JP 4-236102 (JP, A) Actually open 6-66206 (JP, U) Actually open 62-29393 (JP, U) Actual public Sho 49-23363 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60D 1/14 B60P 3/12 B61B 13/00

Claims (6)

(57) [Claims] 1. A pair of left and right wheels (10a), (10) for a front part and a rear part of a mobile vehicle (1) having drive wheels (3).
A towing device for a moving vehicle for pulling and transporting a towed object (10) having b), which is capable of swinging around an axis (P) substantially along the lateral width direction of the moving vehicle (1). (5) is connected to the rear part of the moving vehicle (1), a grounding wheel (6) is provided below the towing base (5), and the towed object (10) is provided above the towing base (5). ) Is provided with a jack mechanism (7) having a holding member (11) for contacting and holding the lower surface of the front or rear of the moving vehicle (1), and the drive wheel (3) of the moving vehicle (1) is provided at the rear of the moving vehicle (1). And the jack mechanism (7) is provided on the front side of the ground wheel (6) of the towing base (5) so that the ground wheel (6) is a caster-type ground wheel (6).
Directly above the drive wheels (3) of the moving vehicle (1) or
The horizontal axis (4) located in front of the drive wheel (3)
Through the tow platform (5) to the side of the moving vehicle (1).
It is swingably connected around the axis (P) along the width direction.
A moving vehicle towing device. 2. A pair of left and right wheels (1) at the front or rear of the towed object (10) when the towing base (5) having the jack mechanism (7) is contracted in the state where the jack mechanism (7) is contracted.
The traction device for a mobile vehicle according to claim 1, wherein the traction device is insertable between 0a) and (10b). 3. The tow vehicle according to claim 2, wherein the holding member (11) is configured to be rotatable around an axis (Q) extending substantially vertically with respect to the towing base (5). apparatus. 4. The towing base (5) for connecting the jack mechanism (7).
4. The structure according to claim 3, wherein the holding member (11) is provided so as not to be rotatable with respect to the jack mechanism (7) and is rotatable about an axis (Q) extending substantially in the vertical direction. Towing device for mobile vehicles. 5. The moving vehicle (1) is provided with the towed object (1).
0) is the towed object loading position (A) and towed object unloading position
Automatically travels along a predetermined path (L) that goes to the location (B)
5. A self-propelled mobile vehicle that operates.
A moving vehicle traction device as described . 6. The automatic traveling vehicle (1) is provided with the
Formed by feeder lines that are arranged along a fixed path (L)
A power receiving coil (13) for generating electric power by a magnetic field
The drive is performed by the electric power from the power receiving coil (13).
Control means for controlling the drive of the wheels (3) are provided.
Item 5. A towing device for a moving vehicle according to item 5 .