JP2001071911A - Carrier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carrier capable of adjusting the tread and adjusting the heights of loading platforms. SOLUTION: With this carrier 1, two, right and left loading platforms 2 are connected so that they can move toward and move apart from each other, and right and left traveling wheel bodies 6 respectively provided below the right and left loading platforms are connected so that they can move nearer and move apart from each other, by an extensible rotating driving shaft which can rotate forward and reversely. In this case, two, right and left frames 4 for supporting the right and left traveling wheel bodies respectively, are provided below the right and left loading platforms, and a vertical interval adjusting means 39 for respectively adjusting the vertical intervals between the corresponding loading platforms and frames, is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to radish, cabbage,
The present invention relates to a transport vehicle used for harvesting and transporting crops such as vegetables such as lettuce and tomato and various fruits.

[0002]

2. Description of the Related Art Vehicles for transporting vegetables and the like include those in which the left and right running wheels are made of crawlers or wheels, and all types of vehicles run over ridges where agricultural products grow. May be run at. However, ridge width varies depending on the type of crop. As a transport vehicle that can cope with such situations, tread adjustment function,
In other words, there is a device having a function of adjusting the interval between the left and right running wheels and the width of the loading platform on which crops are placed.

[0003]

The height of a crop varies depending on the type of crop. However, conventionally, since the height of the carrier of the transport vehicle is constant, there has been a problem that, when harvesting or the like, the work efficiency is deteriorated when the height of the crop and the height of the carrier are significantly different.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an object of the present invention is to provide a transport vehicle capable of adjusting the height of a carrier as well as adjusting a tread. for that reason,
According to the first aspect of the present invention, the right and left two loading platforms are connected to each other so as to be able to approach and separate from each other, and the left and right traveling wheels provided below each of the left and right loading platforms are rotatable in normal and reverse directions and extend and contract. In a transport vehicle connected to each other by a free rotary drive shaft so as to be able to approach and move away from each other, two frames on the left and right sides respectively supporting the left and right running wheels are provided below each of the left and right carriers, and A vertical space adjusting means for adjusting the vertical space between the loading platform and the frame.

[0005] According to the above configuration, the so-called tread adjustment can be performed by simultaneously moving the left and right loading platforms and the left and right running wheels toward or away from each other.
Also, by adjusting the vertical distance between the left and right frames and the left and right loading platforms, the height of the loading platform can be adjusted.

According to a second aspect of the present invention, in the configuration of the first aspect, the vertical spacing adjusting means includes a plurality of link members, each of which is disposed between a corresponding loading platform and a frame, and which can adjust an inclination angle, and these links. It is characterized by comprising driving means for adjusting the inclination angle of the member. Here, as the driving means, for example, various cylinders such as a hydraulic type, a jack mechanism and the like can be used.

According to a third aspect of the present invention, there is provided the transportation vehicle according to the second aspect, wherein a power source for driving the traveling wheel is provided on one of the left and right platforms, and the power source corresponds to the driving-side rotating member on the platform side. The driving force of the power source is transmitted to the frame side by an endless transmission member bridged between the driven-side rotating members on the frame side, and the distance between the driving-side and driven-side rotating members is the link member. Is approximately equal to the length of
The inclination angle of the endless transmission member is substantially equal to the inclination angle of the link member.

According to a fourth aspect of the present invention, in the transportation vehicle according to any one of the first to third aspects, an operation unit for instructing driving of the power source and the driving means is provided on one of the left and right loading platforms. It is characterized by being provided.

According to a fifth aspect of the present invention, there is provided the transportation vehicle according to any one of the first to fourth aspects, wherein a female screw member is provided on one of the left and right loading platforms, and a screw shaft is provided on the other loading platform to be screwed with the female screw member. Power transmission path for transmitting the power of the power source to the screw shaft, and clutch means for turning on and off the transmission of power to the screw shaft in the power transmission path. Is what you do.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a left side view, FIG. 2 is a right side view, and FIG. 3 is a schematic sectional view taken along lines III-III in FIGS. 1 and 2. For convenience of explanation, FIG. FIG. 2 shows only the members arranged near the left side, and FIG. 2 mainly shows only the members arranged near the left side of the vehicle body. In FIG. 3, link members and the like described below are omitted for convenience.

As shown in FIGS. 1 to 3, the carrier 1
A left carrier 2 formed in a hollow plate shape; a right carrier 3 inserted into the hollow portion of the left carrier 2 and connected to the left carrier 2 so as to approach or separate in the vehicle width direction; Left and right two frames 4, 5 arranged below each of the right carrier 3,
Left and right crawlers 6, 7 (running wheels) supported by these frames 4, 5 are provided. Note that a foil may be used instead of the crawlers 6 and 7.

An engine 8 as a power source is mounted near the vehicle body on the left bed 2. An output pulley 9 is provided on an output shaft of the engine 8, and an input pulley 11 is protruded from a speed reducer 10 attached to the lower surface side of the left carrier 2 slightly forward of the engine 8.
A V-belt 12 is wound between the two, and the power of the engine 8 is transmitted to the input pulley 11 of the speed reducer 10.

A switching roller 12a is provided along the V-belt 12 to switch between applying and releasing the tension on the V-belt 12.
The power of the engine 8 is transmitted to the speed reducer 10 only when tension is applied to the belt 12.

A left output sprocket 13 projects from the speed reducer 10 to the outside of the vehicle body, while a rotary drive shaft 14 extending in the vehicle width direction projects from the speed reducer 10 to the inside of the vehicle body, and a right end of the rotary drive shaft 14. Right output sprocket 1 near the part
5 is attached. A gear mechanism (not shown) in the reduction gear 10 has a function of reducing the number of rotations of the input pulley 11 and transmitting it to the output sprockets 13 and 15, and switching the rotation direction of the output sprockets 13 and 15 to forward or reverse. Function.

The rotary drive shaft 14 is constituted by a hollow outer shaft 14a connected to the speed reducer 10 and an inner shaft 14b fitted in the outer shaft 14a so as to be slidable only. The right output sprocket 15 is provided on the inner shaft 14b. The outer shaft 14a and the inner shaft 14b are formed in a rectangular cross section or the like so that relative rotation does not occur.

Support shafts 17 are rotatably provided on the left and right frames 4 and 5 via bearings 16, respectively. The first and second intermediate sprockets 1 are provided on these support shafts 17, respectively.
8, 19 are coaxially mounted. A first endless chain 21 (endless transmission member) is bridged between each output sprocket 13, 15 (drive side rotation member) and each first intermediate sprocket 18 (driven side rotation member).

A plurality of rollers 22 are arranged in the crawlers 6 and 7, respectively, and these rollers 22 are rotatably supported by the frames 4 and 5 via support members (not shown). A driving sprocket 23 is attached to the roller 22 at the rear end position of the vehicle body, and a second endless chain 24 is bridged between the second intermediate sprocket 19 and the driving sprocket 23.

With the above configuration, when the transport vehicle 1 is driven, the power of the engine 8 is transmitted to the speed reducer 10 via the V-belt 12, and the output sprockets 13 and 15 on the left and right sides are further transmitted from the speed reducer 10. The power is transmitted to each drive sprocket 23 via the first endless chain 21, each of the first and second intermediate sprockets 18, 19, and each of the second endless chains 24, and the crawlers 6, 7 are driven by the rollers 22 at the rear end position. You.

Next, a description will be given of a tread adjustment mechanism for adjusting the distance between the right and left crawlers 6, 7 in the vehicle width direction. As shown in FIG. 4, the screw shaft 2
5 is supported via a support member 26 so as to be rotatable and immovable in the axial direction, while a nut 27 (female screw member) is attached to the lower surface of the left loading platform 2, and the screw shaft 25 is a nut 27 is rotatably screwed (that is, freely movable in the axial direction).

A driven pulley 28 is attached to the right end of the screw shaft 25 in the vehicle width direction, and a drive pulley 29 is attached to a corresponding end of the rotary drive shaft 14, and an endless belt is provided between the pulleys 28 and 29. 31 (power transmission path) is wound. Endless belt 31 on the driven pulley 28 side
Above and below the first and second arms 32, 33, respectively.
A (clutch means) is rotatably arranged around each of the fulcrums 32a and 33a, and these fulcrums 32a and 33a are supported by the right carrier 3 via a support member (not shown).

Rollers 34 are supported at the rear ends of the arms 32 and 33, respectively.
The tension can be applied to or released from the endless belt 31 with the rotation of the rollers 2 and 33. Each fulcrum 32a,
A roller 34 is provided between the arms 32, 33 on the front side of 33a.
A coil spring 35 for urging the arms 32 and 33 in the direction of releasing the tension due to is provided.

On the other hand, the arms 32, 33 on the rear side of the fulcrums 32a, 33a are attached to the arms 32, 33 in the tension applying direction.
A push / pull member 36 for urging the member 33 is attached. The push-pull member 36 includes an outer wire 36a and an inner wire 36b disposed inside the outer wire 36a. An end of the outer wire 36a is connected to the arm 33, and an end of the inner wire 36b is connected to the arm 32.

Next, the vertical spacing adjusting means 39 for adjusting the heights of the left loading platform 2 and the right loading platform 3 will be described. FIG.
As shown in FIG. 2, a pair of front and rear link members 37 and 38 are arranged between the left carrier 2 and the left frame 4 and between the right carrier 3 and the right frame 5, respectively.
Both ends of 38 are rotatably connected to the carriers 2 and 3 and the frames 4 and 5 via the fulcrums 40.

Hydraulic cylinders 42 (driving means) each comprising a main body 42a and a rod 42b which can come and go from the main body 42a are arranged between the left and right frames 4, 5 and the front link members 37, respectively. By linking the link members 37 and 38 with each other by the hydraulic cylinder 42, the heights of the left and right loading platforms 2 and 3 are simultaneously changed.

The inclination angles α (see FIG. 1) of the front and rear link members 37 and 38 with respect to the horizontal line are made substantially equal to each other, and the inclination angle of the first endless chain 21 (the center line L) with respect to the horizontal line is also set as described above. Link member 37,
38, and these relationships are maintained even if the inclination angle α changes due to the swinging of the link members 37, 38.

The distance between the output sprockets 13, 15 around which the first endless chain 21 is wound and the first intermediate sprocket 18 is substantially equal to the distance between the fulcrums 40 at both ends of the link members 37, 38. ing. This allows
The distance between the output sprockets 13 and 15 and the first intermediate sprocket 18 is kept substantially constant regardless of the inclination angle α of the link members 37 and 38 and the first endless chain 21, in other words, regardless of the height of each of the carriers 2 and 3. Therefore, the power transmission by the first endless chain 21 is performed smoothly regardless of the height of the loading platforms 2 and 3.

The rear end of the left loading bed 2 has an engine 8
An operation unit (not shown) having a plurality of operation levers for instructing traveling of the transport vehicle 1, tread adjustment, height adjustment of the loading platforms 2, 3 and the like is provided by appropriately driving the hydraulic cylinder 42. ing.

The procedure for adjusting the tread of the transport vehicle 1 and the height of the carriers 2 and 3 will be described below. First, when tread adjustment is performed in a direction to increase the distance between the left and right crawlers 6 and 7, for example, the tread adjustment is performed by a predetermined operation lever while the rotation drive shaft 14 is rotated in a direction to advance the transport vehicle 1. Is instructed, the inner wire 36b of the push / pull member 36 is pulled in accordance with the above operation, and each roller 3
4 is pressed by the endless belt 31 to apply tension.

As a result, the power of the engine 8 is transmitted from the rotary drive shaft 14 to the driven pulley 28 via the drive pulley 29 and the endless belt 31, and the screw shaft 25 rotates relative to the nut body 27, so that the right The carrier 3 moves in a direction away from the left carrier 2, and the tread is adjusted in a direction to increase the interval between the left and right crawlers 6 and 7 as shown in FIG. 5. In the case where the tread is adjusted to be reduced, tension may be applied to the endless belt 31 in a state where the rotary drive shaft 14 is rotated in the direction in which the transport vehicle 1 moves backward.

Next, when it is desired to increase the height of the loading platforms 2 and 3 from the state shown in FIGS. 1 and 2, when a command to raise the loading platforms 2 and 3 is given by a predetermined operation lever, the hydraulic cylinder 42 is driven. The rod 42b is pushed out. This allows
As shown in FIGS. 6 and 7, the inclination angles of the link members 37 and 38 increase, and the height of the loading platforms 2 and 3 increases. Conversely, when lowering the height of the loading platforms 2 and 3, the hydraulic cylinder 4
The second rod 42b may be immersed in the main body 42a.

As described above, in this embodiment, not only the tread adjustment but also the height adjustment of the loading platforms 2 and 3 can be performed. By adjusting the heights of a few, various operations such as harvesting and care can be performed smoothly.
In addition, since the operation unit 43 is provided on the left loading platform 2, the operation of the operation unit 43 can be easily performed even when working on the loading platforms 2 and 3 for harvesting and care of fruits and the like. There is.

Next, a second embodiment of the present invention will be described. Here, as shown in FIG. 8, a jack 44 is used in place of the hydraulic cylinder 42 for adjusting the height of the loading platforms 2 and 3. That is, the jack 44 is disposed between the left or right carrier 2 or 3 and the corresponding front link member 37.

By operating the jack 44 manually or by a motor (not shown), the inclination angles of the link members 37 and 38 can be changed, and the height of the loading platforms 2 and 3 can be adjusted. FIG. 9 shows a state where the heights of the loading platforms 2 and 3 are increased. In addition, the same reference numerals are given to the portions having the same configuration as that of the first embodiment, and the duplicated description will be omitted. Reference numeral 43 denotes an operation unit having an operation lever 43a.

[0034]

As described above, according to the first aspect of the present invention,
The right and left two carriers are connected so that they can approach and separate from each other, and the left and right traveling wheels provided below each of the left and right carriers can rotate forward and reverse and extend and contract with a rotatable drive shaft. In a transport vehicle connected to each other so as to be able to approach and separate from each other, two frames on the left and right sides respectively supporting the left and right running wheels are provided below each of the left and right carriers,
In addition, since the vertical interval adjusting means for adjusting the vertical interval between the corresponding loading platform and the frame is provided, the left and right loading platforms and the left and right traveling wheels are simultaneously approached or separated from each other, so-called Not only can tread adjustment be performed, but also the height of the loading platform can be adjusted by adjusting the vertical spacing between the left and right frames and the left and right loading platforms. Thereby, at the time of harvesting crops, etc., the work efficiency can be improved by appropriately adjusting the height of the bed according to the height of the crops.

According to a second aspect of the present invention, in the configuration of the first aspect, the vertical spacing adjusting means includes a plurality of link members, each of which is disposed between the corresponding loading platform and the frame, and which can adjust the inclination angle, and these links. Since the drive means for adjusting the inclination angle of the member is provided, there is an advantage that the height of the carrier can be adjusted by a relatively simple configuration using the link member.

According to a third aspect of the present invention, there is provided the transportation vehicle according to the second aspect, wherein a power source for driving the traveling wheel is provided on the left or right carrier, and the power source corresponds to the drive-side rotating member on the carrier side. The driving force of the power source is transmitted to the frame side by an endless transmission member bridged between the driven side rotating members on the frame side, and the distance between the driving side and the driven side rotating members is the link member. Is approximately equal to the length of
Since the inclination angle of the endless transmission member is substantially equal to the inclination angle of the link member, even when the height of the bed is changed by changing the inclination angle of the link member, the endless transmission member is Since the inclination angle which is substantially equal to that of the link member is always maintained, the power transmission from the power source to the frame side (running wheel side) by the endless transmission member is advantageously performed smoothly regardless of the height of the carrier.

According to a fourth aspect of the present invention, there is provided the transportation vehicle according to any one of the first to third aspects, wherein the operation unit for instructing the driving of the power source and the driving means is provided on one of the left and right loading platforms. Since it is provided, regardless of whether the worker is walking on the ground near the carrier or the worker is working on the carrier of the carrier, the operation of the operation unit There is an advantage that is easy to do.

According to a fifth aspect of the present invention, there is provided the carrier according to any one of the first to fourth aspects, wherein a female screw member is provided on one of the left and right loading platforms, and a screw shaft is provided on the other loading platform to be screwed with the female screw member. And a power transmission path for transmitting the power of the power source to the screw shaft, and a clutch means for turning on and off the transmission of power to the screw shaft in the power transmission path. When the clutch means is turned on, the power of the power source is transmitted to the screw shaft through the power transmission path, and the left and right carriers are moved closer or farther apart by rotating the screw shaft in a desired direction. it can. Thus, tread adjustment can be easily performed without relying on human power or the like using the power of the power source.

[Brief description of the drawings]

FIG. 1 is a schematic left side view showing a transport vehicle according to a first embodiment of the present invention.

FIG. 2 is a schematic right side view showing the transport vehicle.

FIG. 3 is a schematic sectional view taken along lines III-III in FIGS. 1 and 2;

FIG. 4 is a schematic sectional view taken along the line IV-IV of FIG. 2;

FIG. 5 is a schematic sectional view corresponding to FIG. 3 and showing a state in which the tread of the carrier is increased.

FIG. 6 is a schematic left side view showing a state where the height of a carrier of the carrier is increased.

FIG. 7 is a schematic right side view showing a state where the height of the bed of the carrier is increased.

FIG. 8 is a schematic left side view showing a transport vehicle according to a second embodiment of the present invention.

FIG. 9 is a partial left side view showing a state where the carrier of the carrier shown in FIG. 8 is raised.

[Explanation of symbols]

 2 Left carrier 3 Right carrier 4, 5 Frame 6, 7 Crawler (running wheel) 13, 15 Output sprocket (drive-side rotating member) 18 First intermediate sprocket (driven-side rotating member) 21 First endless chain (endless transmission) 25) Screw shaft 27 Nut body (female screw member) 31 Endless belt (power transmission path) 32, 33 First and second arms (clutch means) 37, 38 Link member 39 Vertical gap adjusting means 42 Hydraulic cylinder (Drive means) 43 Operation unit

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[Procedure amendment]

[Submission Date] May 18, 2000 (200.5.1)
8)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

2. The transportation vehicle according to claim 1 , wherein an operation unit for instructing driving of the power source and the driving means is provided on one of the left and right loading platforms.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an object of the present invention is to provide a transport vehicle capable of adjusting the height of a carrier as well as adjusting a tread. for that reason,
According to the first aspect of the present invention, the right and left two loading platforms are connected to each other so as to be able to approach and separate from each other, and the left and right traveling wheels provided below each of the left and right loading platforms are rotatable in normal and reverse directions and extend and contract. In a transport vehicle connected to each other by a free rotary drive shaft so as to be able to approach and move away from each other, two frames on the left and right sides respectively supporting the left and right running wheels are provided below each of the left and right carriers, and Vertical spacing adjusting means for adjusting the vertical spacing between the loading platform and the frame, respectively, is provided .
The vertical spacing adjustment means is provided between the corresponding loading
A plurality of link members, each having a plurality of adjustable tilt angles,
A driving hand for adjusting the inclination angle of these link members
And the power source for driving the traveling wheel body is the left
It is installed on one of the loading platforms on the right,
Between the rotating member and the corresponding driven rotating member on the frame side
The driving force of the power source is transmitted by the endless transmission member
To the drive side and the driven side and the driven side.
The distance between the rotating members is substantially equal to the length of the link member,
And the inclination angle of the endless transmission member is
It is made almost equal to the angle of inclination, and either
The female screw member is mounted on one loading platform, and the female screw section is mounted on the other loading platform.
A screw shaft for screwing to the material is provided, and the power source
Power transmission path for transmitting the power of
Turns on the transmission of power to the screw shaft in the force transmission path
-It is characterized in that a clutch means for turning off is provided .

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005] According to the above configuration, the so-called tread adjustment can be performed by simultaneously moving the left and right loading platforms and the left and right running wheels toward or away from each other.
Also, by adjusting the vertical distance between the left and right frames and the left and right loading platforms, the height of the loading platform can be adjusted. In addition,
As the driving means, for example, various types of cylinders such as hydraulic type
A damper or jack mechanism can be used.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Deleted

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Deleted

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

According to a second aspect of the present invention, in the vehicle of the first aspect , an operation unit for instructing driving of the power source and the driving means is provided on one of the left and right loading platforms. It is a feature.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Deleted

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction contents]

Further, the vertical spacing adjusting means, and adjustable link member of the tilt angle, each being more disposed between the corresponding loading platform and the frame, a driving means for adjusting the inclination angle of these link members Therefore, there is an advantage that the height of the carrier can be adjusted by a relatively simple configuration using a link member.

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction contents]

Further , a power source for driving the traveling wheel body.
There is provided on the bed either the left or right, with an endless transmission member bridged between the driven side rotational member of the frame side corresponding to that loading platform side of the driving side rotational member driving force of the power source <br / > While being transmitted to the frame side, the distance between the driving side and driven side rotating members is substantially equal to the length of the link member, and the inclination angle of the endless transmission member is substantially equal to the inclination angle of the link member. Even if the height of the carrier is changed by changing the inclination angle of the link member, the endless transmission member always maintains the inclination angle substantially equal to that of the link member. Power transmission from the power source to the frame side (running wheel side) by the member is advantageous in that the power transmission is performed smoothly regardless of the height of the carrier.
In addition, a female screw member is provided on one of the left and right loading platforms.
A screw shaft for screwing with the female screw member is provided on one of the loading platforms;
And transmitting the power of the power source to the screw shaft.
A power transmission path and the screw in the power transmission path
A clutch means for turning on and off the transmission of power to the shaft is provided.
The clutch means is turned on,
The power of the power source through the power transmission path.
Transmission to the same shaft and rotate the screw shaft in the desired direction.
Can move the left and right carriers closer or farther apart
You. As a result, the power of the power source can be used to rely on human power or the like.
The tread adjustment can be easily performed without any need.

[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0037

[Correction method] Change

[Correction contents]

According to a second aspect of the present invention, in the configuration of the first aspect , the operation unit for instructing the driving of the power source and the driving means is provided on the left or right carrier. Therefore, whether the worker is walking on the ground on the side of the truck or the worker is working on the bed of the truck, there is an advantage that the operation unit can be easily operated. is there.

[Procedure amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Deleted

Claims (5)

[Claims] The two left and right loading platforms are connected to each other so as to be able to approach and separate from each other, and the left and right running wheels provided below each of the left and right loading platforms are rotatable forward and reverse and extendable and contractible by a rotatable drive shaft. In a transport vehicle connected to each other so as to be able to approach and separate from each other, below each of the left and right loading platforms, two left and right frames respectively supporting the left and right running wheels are provided, and
A transport vehicle provided with vertical interval adjusting means for adjusting respective vertical intervals between a corresponding loading platform and a frame. 2. The vertical spacing adjusting means comprises a plurality of link members, each of which has a plurality of adjustable tilt angles, disposed between a corresponding loading platform and a frame, and a driving means for adjusting the tilt angles of these link members. 2. The method according to claim 1, wherein
The described carrier. 3. A power source for driving the traveling wheel body is provided on one of the left and right loading platforms, and is bridged between a driving-side rotating member on the loading platform and a corresponding driven-side rotating member on a frame. The driving force of the power source is transmitted to the frame side by the endless transmission member, and the distance between the driving side and driven side rotating members is substantially equal to the length of the link member, and the endless transmission member 3. The transport vehicle according to claim 2, wherein the inclination angle is substantially equal to the inclination angle of the link member. 4. The transport according to claim 1, wherein an operation unit for instructing the driving of the power source and the driving unit is provided on one of the left and right loading platforms. car. 5. A power transmission path for transmitting a power of the power source to the screw shaft, the female screw member being provided on one of the left and right loading platforms, and a screw shaft being screwed to the female screw member being provided on the other loading platform. The vehicle according to any one of claims 1 to 4, further comprising: clutch means for turning on / off transmission of power to the screw shaft in the power transmission path.