JP2001301672A - Device for adjusting tension of crawler belt of high- floor type carrying vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for adjusting the tension of a crawler belt capable of constantly maintaining the tension of the crawler belt to be changed with elevation of a load in a high-floor type carrying vehicle provided with driving wheels in an elevating deck thereof. SOLUTION: This device for adjusting the tension of a crawler belt is provided with a first crawler tension finely adjusting means 14 formed by fitting one end of a driven wheel rod 11, to which an upper driven wheel 26 is fitted at the other end thereof, to an intermediate guide 12 freely to be slid and supporting the intermediate guide 12 along a slide rail 42 of a frame part freely to be slid, and fitting the intermediate guide 12 to a second link member 44 so as to stop the insertion of the driven rod 11 in relation to the intermediate guide 12 and so as to finely adjust the stop position and a second crawler tension finely adjusting means 16 working as a stopper of the driven rod 11 to be moved toward the center of the crawler belt 25 and for finely adjusting this stopper position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to radish, cabbage,
The present invention relates to a crawler belt tension adjusting device of a high-floor type transport vehicle equipped with a platform lifting device used for harvesting and transporting vegetables and fruits such as lettuce and tomato.

[0002]

2. Description of the Related Art As a high-floor type transport vehicle equipped with a loading platform elevating device, for example, as shown in FIG. 7, a loading platform 3 is mounted on a main frame 22 on which left and right crawler traveling bodies 20 are mounted.
The platform lifting device 60 for lifting and lowering the
There is a stilt-type carrier B in which a motor 0 and a motor 23 are provided on the main frame 22. The carrier lifting device 60 includes:
For example, the loading platform 30 is moved up and down via a link mechanism 62 by utilizing expansion and contraction of a hydraulic cylinder 61 and the like.
Since the operation unit 50 remains fixed to the main frame 22 while the loading platform 30 moves up and down, the operation unit 50 is too high or too low relative to the loading platform 30 in terms of work. In some cases, the operability for a person working on the carrier 30 is poor. Note that one end of the link mechanism 62 is connected to the carrier 30 or the main frame 22.
A link member 64, which is rotatably and slidably supported along the rail 63 at the other end, is rotatably mounted at an intermediate portion therebetween.

A stilt-type carrier C provided with a pallet-lifting device 70 different from the pallet-lifting device 60 of the trolley B will be described with reference to FIG. This carrier lifting device 70
The both ends of a plurality of link members 71 are respectively axially mounted on the carrier 30 and the main frame 22 in parallel, and a hydraulic cylinder 72 is provided at an intermediate portion of one of the link members 71.
Of the main frame 2
The loading platform 30 is moved up and down by extending and retracting the hydraulic cylinder 72.
Then, the prime mover 23 and the operation unit 50 of the raised floor type transport vehicle C
And a speed reducer 27 are installed on the carrier 30 and the speed reducer 27
Pulleys 28a and 28b are provided on the output shaft of the speed reducer 27 and the main frame 22, respectively, as a power transmission means between the drive wheels 24 and the endless belt 29a.
And an endless belt 29b is attached to the pulley 28b and the driving wheel 24. With this configuration, the endless belt 29a rotates in parallel with the rotating link member 71 when the loading platform 30 moves up and down, and the center-to-center distance between the pulleys 28a and 28b fluctuates substantially. Therefore, the driving force of the prime mover 23 can be transmitted to the drive wheels 24 without adjusting the tension of the endless belt 29a even when the loading platform 30 moves up and down.

[0004] In the case of this raised floor type transport vehicle C, the operation unit 50
However, since it is provided on the loading platform 30, there is no problem that the workability of the worker on the loading platform is deteriorated as described above. However, due to the structure of the lifting device 70, the loading platform 30 Will move in parallel.

[0005] The stilt-type transport vehicle having the advantages of both the stilt-type transport vehicle B and the stilt-type transport vehicle C, that is, the loading platform 30 is vertically moved up and down without parallel translation, and the operation unit In the case of a high-floor type transport vehicle 50 having an elevating device that moves up and down together with the loading platform 30, the workability on the loading platform is significantly improved. In order to realize this, it is conceivable to develop on the basis of an elevating device that vertically moves up and down like the elevating device 60 of the high-floor type transport vehicle B. However, it is necessary to change the separation distance between the operation unit 50 and the drive wheel 24, and if this separation distance is changed,
During this time, the operation and the power transmission mechanism are complicated, and the manufacturing cost is usually increased.

In order to solve this problem, the applicant of the present application has changed the operation unit 50, the prime mover 23 and the drive wheels 24 to the carrier 3
A high-floor-type transport vehicle installed at No. 0 However, by doing so, the drive wheels 24 move up and down together with the ascending and descending of the bed 30, so that the crawler traveling body 20
The crawler belt is too tight or too loose, adjust the crawler belt tension each time, or
There is a problem that a crawler belt having an appropriate circumference must be replaced.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a high-floor type transport vehicle provided on a carrier on which a driving wheel of a crawler type traveling body moves up and down. It is an object of the present invention to provide a crawler belt tension adjusting device that maintains a constant crawler belt tension that changes as the loading platform moves up and down.

[0008]

According to a first aspect of the present invention, there is provided an apparatus for adjusting the tension of a crawler belt of a high-floor type transport vehicle, comprising: a carrier, a crawler traveling body; And a carrier platform lift device installed between the carrier and a frame portion of the traveling body, wherein the crawler-type traveling body includes a driving wheel and a plurality of crawlers disposed on a ground contact surface. A driven wheel, an upper driven wheel provided on an upper portion of the crawler type traveling body, the drive wheel, the plurality of crawler driven wheels and a crawler belt attached such that the upper driven wheel is interlocked, and A crawler driven wheel that is mounted on the frame portion, the drive wheel is attached to the carrier, and the carrier lift device is provided on the carrier with its longitudinal direction being the front-rear direction. When, A frame part slide rail provided on the frame part with its longitudinal direction being the front-rear direction, one end of which is rotatably and slidably supported along the carrier part slide rail, and the other end is rotatable with the frame part. A first link member supported by the first and second frame members, one end of which is rotatably and slidably supported along the frame portion slide rail, and the other end of which is rotatably supported by the loading platform and is supported by the first link member. A second link member pivotally mounted at an intermediate position between the first link member and the end of the second link member in the loading platform or the frame portion; In a stilt-type transport vehicle that raises and lowers the loading platform by being provided, a driven wheel rod having the upper driven wheel pivotally mounted at one end thereof, and the other end side thereof being The driven wheel rod is axially mounted on the second link member so that the driven wheel rod is slidably supported along the frame part slide rail and the front wheel rod slides back and forth with one end of the second link member. It is characterized by:

According to a second aspect of the present invention, there is provided an apparatus for adjusting the tension of a crawler belt of a high-floor type transport vehicle, comprising:
A trolley-type carrier equipped with a carrier lifting device installed between the carrier and a frame of the crawler-type traveling body, wherein the crawler-type traveling body is disposed on a driving wheel and a ground contact surface. A plurality of provided crawler driven wheels, an upper driven wheel provided above the crawler-type traveling body, and a crawler mounted such that the drive wheel, the plurality of crawler driven wheels, and the upper driven wheel are interlocked. A belt, and the frame portion on which the plurality of crawler driven wheels are axially mounted, wherein the drive wheels are attached to the carrier, and the carrier lift device is provided on the carrier with the longitudinal direction of the carrier being longitudinal. A slide rail provided on the carrier part, a slide rail provided on the frame part with its longitudinal direction being the front-rear direction, and one end thereof is rotatable and slidable along the slide part rail. A first link member and the other end with the lifting is rotatably supported by the frame portion,
A second end is rotatably and slidably supported along the frame portion slide rail and the other end is rotatably supported by the loading platform, and is axially attached to the first link member at an intermediate position therebetween. And the approaching / separating means for approaching / separating the distance between the ends of the first link member and the second link member in the carrier or the frame portion. In the stilt type transport vehicle, the other end of a driven wheel rod having the upper driven wheel pivotally mounted on one end is slidably fitted into the intermediate guide, and the intermediate guide is slidably supported along the frame portion slide rail. The intermediate guide is axially mounted on the second link member so that the intermediate guide slides back and forth together with one end of the second link member, and the driven wheel locks. Wherein together form the insertion of a dead end for the intermediate guide is characterized by having a tension fine adjustment means in the first crawler finely adjusting the position of the dead end.

According to a third aspect of the present invention, there is provided a crawler belt tension adjusting device for a stilt type vehicle according to the first or second aspect, wherein the crawler belt tension adjusting device is directed toward a center side of the crawler belt. A dead end of the moving driven wheel rod is provided, and a second crawler tension fine adjustment means for finely adjusting the position of the dead end is provided.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a crawler belt tension adjusting device 10 for a raised floor type carrier according to an embodiment of the present invention will be described with reference to the drawings. 1 includes a crawler-type traveling body 20 provided on the left and right as a traveling body, a loading platform 30 on which vegetables, containers, and the like are loaded, a frame portion 21 of the crawler-type traveling body 20, and the loading platform. 3
0, a loading / unloading device 40 for lifting and lowering the loading platform 30, a main frame 22 for connecting and supporting the left and right frame portions 21, and an operation unit 50 provided on the loading platform 30. ing.

The crawler-type traveling body 20 includes, for example, a driving wheel 24 that outputs a rotational driving force of the motor 23 in conjunction with a motor 23, a crawler belt 25 that meshes with the driving wheel 24 and cooperates, and A plurality of crawler driven wheels 26 which are fitted on convex portions 25 a (FIG. 3) provided in the circumferential direction of the inner surface of the crawler belt 25 and are disposed on a ground surface cooperating with the crawler belt 25, An upper driven wheel 26a provided on an upper portion of the traveling body 20; and the frame portion 21 on which the plurality of crawler driven wheels 26 are pivotally mounted.
Is fixed on both sides.

The loading platform elevating device 40 includes a loading platform slide rail 41 provided on both lower sides of the loading platform 30 with its longitudinal direction being the front-rear direction. A frame slide rail 42 provided in the first direction and a first end rotatably and slidably supported along the carrier slide rail 41 and a first end rotatably supported by the frame 21. And one end of the link member 43 is rotatably and slidably supported along the frame portion slide rail 42, and the other end is rotatably supported by the loading platform 30. A second link member 44 pivotally mounted at an intermediate position, and ends of the first link member 43 and the second link member 44 in the carrier 30; The spacing is obtained with the approach separating means 45 to close away. The approach / separation means 4
5 is not provided on the carrier 30 and the frame 21
And the distance between the end portions of the first link member 43 and the second link member 44 may be approached or separated from each other.

The loading section slide rail 41 is, for example, a rail having a U-shaped cross section, and is fixed to both sides of the lower surface of the loading section 30 with its opening facing inward. A rotary sliding shaft 46 composed of a ball bearing or the like, which is axially mounted on the side surface of the end of the link member 43, is slidably fitted along the groove of the carrier slide rail 41. The frame slide rail 42 is
For example, as shown in FIG.
It is a character-shaped rail, and is fixed on the left and right frame portions 21 with its longitudinal direction being the front-back direction. The second link member 44 is provided in the groove.
The two loops 17 pivotally mounted on both sides of the end portion of the intermediate guide 12 and both sides of the intermediate guide 12, and the other two loops 17 pivotally mounted only on both sides of the intermediate guide 12 extend along the groove. It is slidably fitted. The intermediate guide 12 will be described later.

As shown in FIG. 1, the approaching / separating means 45 is provided at the upper end of the first link member 43 on both sides of the carrier 30, for example, at a fulcrum member having a female thread formed on the upper part of a block material. The front end of the externally threaded jack rod 48 is axially supported on the member 30a of the carrier 30 so as not to move in the front-rear (axial) direction, and is screwed into the female screw of the fulcrum member 47. A handle 49 is attached to the section so that the handle can be operated at the rear of the carrier 30. By rotating the left and right jack rods 48 in a predetermined direction, the upper end of the first link member 43 and the upper end of the second link member 44 are brought close to each other, and the loading platform 30 is raised, and these are separated from each other. Then, the carrier 30 is lowered. The approaching / separating means 45 is not limited to this, and a hydraulic cylinder or the like is used instead of the jack rod 48, and the link members 43 and 44 are used as described above.
For example, means for moving the upper end of the object closer to or away from the object may be used.

The crawler belt tension adjusting device 10 for a stilt type transport vehicle according to the present embodiment is the same as the stilt type transport vehicle A described above, except that the upper driven wheel 26a is mounted on one end of the driven wheel rod 11 at the other end. The side slides freely on the intermediate guide 12
, The intermediate guide 12 is slidably supported along the frame portion slide rail 42,
The intermediate guide 12 is pivotally mounted on the second link member 44 so that the intermediate guide 12 slides back and forth together with the link member 44 of the second embodiment, and forms a dead end for insertion of the driven wheel rod 11 into the intermediate guide 12. And a first crawler tension fine adjustment means 14 for finely adjusting the position of the dead end.
5 and a second crawler tension fine adjustment means 16 for making a dead end of the driven wheel rod 11 moving toward the center side of the rod 5 and finely adjusting the position of the dead end.

As shown in FIGS. 1 to 3, the driven wheel rod 11 uses, for example, a hollow square member so that the upper driven wheel 26a does not rotate around its axis. The intermediate guide 12 slidably fitted therein has four loops 17 pivotally attached to a lower portion thereof.
The vertical movement of the slide rail 4
2 bound. With this configuration, the driven wheel rod 11 and the intermediate guide 12 are slidably supported in the front-rear direction along the frame portion slide rail 42.

Fine tension adjusting means 14 for the first crawler
For example, as shown in FIGS. 4 and 5, a bracket 14 a provided with a female screw is fixedly mounted on one side surface of the driven wheel rod 11, and a bolt 14 b is screwed thereto, while the intermediate guide 12 The locking plate 14c is fixedly provided on the extension of the bolt 14b. With this configuration, in use, the upper driven wheel 26a is pressed toward the center (the arrow F side) of the crawler belt 26 by the crawler belt 25, and is engaged with the tip of the bolt 14b. The plate 14c is provided with a second tension fine adjustment means 1 described later.
Except in the case where 6 acts, it is in a contact state. In this contact state, the bolt 14b is rotated to rotate the driven wheel rod 11 with respect to the intermediate guide 12.
By finely adjusting the position of the crawler belt 25,
Make fine adjustments to the tension.

The second fine crawler tension adjusting means 16
For example, as shown in FIG. 5, a protruding plate 16a provided with a female screw is fixed on a front track on which the driven wheel rod 11 moves on the frame portion 21, and a bolt 16
b is screwed to lock the tip of the driven wheel rod 11 at a fixed position to the head of the bolt 16b. When the carrier 30 is at a high position, the driven wheel rod 11 approaches the center of the crawler belt 26, that is, the bolt 16b, as shown in FIG. Is locked to the head. When the carrier 30 is further raised, only the intermediate guide 12 moves while the driven wheel rod 11 remains locked. As a result, while the drive wheel 24 moves up, the upper driven wheel 26a does not move, so that tension can be given to the crawler belt 26. Further, since the bolt 16b is screwed to the protruding plate 16a, the bolt 16b is turned to be moved in the front-rear direction to move the dead end position of the driven wheel rod 11, so that the crawler belt 25 is You can adjust the tensioning position again. In addition, the second crawler tension fine adjustment means 16 adjusts the movement of the upper driven wheel 26a with respect to the rise of the drive wheel 24 to be larger than an ideal value, so that the crawler 30 is moved to a higher position. This is effective when the tension of the belt 25 is weakened.

The case where the loading platform 30 is raised and lowered by using the crawler belt tension adjusting device 10 of the above-described raised floor type transport vehicle will be described below. For example, as shown in FIG. 1, when raising the loading platform 30 from a low position, the loading platform lifting handles 49 provided on the left and right rear portions of the loading platform 30 are turned. Then, the first link member 43 and the second link member 44 rotate while the distance between the first link member 43 of the carrier lifting device 40 and the upper end of the second link member 44 is reduced. Then, the bed 30 is raised. At this time, the drive wheels 24
Since the crawlers rise together with the loading platform 30, the circumference of the crawler belt must be increased in this state. However, the intermediate guide 12 slides forward along the frame part slide rail 42 together with the lower end of the second link member 44, and accordingly, the upper driven wheel 26a and the driven wheel rod 11 also move forward. (To the center of the crawler belt), the tension of the crawler belt 25 is maintained even if the circumference of the crawler belt 25 remains constant.
It will be kept almost constant.

When the position of the loading platform 30 becomes higher,
As shown in FIG. 2, the tip of the driven wheel rod 11 is locked to the head of the bolt 16b, and
The upper driven wheel 26a does not move with the rise of the crawler belt 2 with the rise of the bed 30.
5 is given tension. At this time, if the crawler belt 25 is tensioned too much, the bolt 16b is turned to move its head toward the protruding plate 16a, and the driven wheel rod 11 is moved to the intermediate guide. 12
By further inserting (moving forward)
The upper driven wheel 26a is further moved forward to reduce the tension of the crawler belt 25. On the other hand, when the tension of the crawler belt 25 is insufficient, the head is separated from the protruding plate 16a by turning the bolt 16b, and the driven wheel rod 11 is pulled out of the intermediate guide 12 in a direction to come out. By moving (rearward), the crawler belt 25 is moved outside, and the crawler belt 25 is tensioned.

As described above, in a stilt type transport vehicle equipped with the crawler belt tension adjusting device 10 of a stilt type transport vehicle, the tension of the crawler belt 25 is substantially maintained even when the driving wheel 24 moves up and down together with the loading platform 30. Since the driving wheel 24 can be maintained at a constant level, it is not necessary to change the crawler belt 25 or adjust the tension every time the carrier 30 moves up and down, even if the carrier has the drive wheels 24 provided on the carrier 30.

In the case where the means for finely adjusting the tension of the first crawler is not required, the driven wheel rod 11 and the intermediate guide may be provided in the crawler belt tension adjusting device of the carrier according to the above-described embodiment. 12, the upper driven wheel moves to the inside of the crawler belt as the cargo bed rises even if they are integrally fixed to each other, so that the tension of the crawler belt can be kept substantially constant. Or, as shown in FIG. 6, for example, without providing the intermediate guide 12, a bearing 11 a is fixed below the driven wheel rod 11, and the ring body 17 that is mounted on the intermediate guide 12 is Even if the crawler belt is slidably supported in the front-rear direction along the carrier slide rail 42 together with the tip of the second link member 44 by being attached to the bearing 11a, the tension of the crawler belt is increased as described above. Can be kept almost constant. Alternatively, the same applies if the bearing is machined on the driven wheel rod 11 itself without providing the bearing 11a and the ring 17 is attached to the bearing.

[0024]

According to the first aspect of the present invention, there is provided a crawler belt tension adjusting device for a high-floor type carrier, wherein the other end of a driven wheel rod having an upper driven wheel mounted on one end thereof is slidable along a frame portion slide rail. The driven wheel rod is mounted on the second link member so that the driven wheel rod slides back and forth together with one end of the second link member. The driving wheel moves toward the center of the crawler belt, so that the tension of the crawler belt can be kept substantially constant. Therefore, the loading platform can be raised and lowered without having to adjust the tension of the crawler belt every time the loading platform is moved up and down or to replace the crawler belt with a crawler belt having a different circumference. Further, by using the crawler belt tension adjusting device of the present raised-floor type transport vehicle, it becomes possible to attach the drive wheels of the crawler to the ascending and descending carrier. As a result, even when the operation unit is installed on the loading platform that moves up and down, the operation unit and the drive wheels move up and down integrally, so that a transmission mechanism such as power and control between these operation units and the drive wheels can be simplified. It can be manufactured with a simple structure and at low cost. Therefore, it is possible to manufacture a low-floor type transport vehicle installed on a carrier on which the operation unit moves up and down at low cost.

According to a second aspect of the present invention, there is provided a crawler belt tension adjusting device for a high-floor type carrier, wherein the other end of a driven wheel rod having an upper driven wheel pivotally mounted at one end thereof is slidably inserted into the intermediate guide, and Is slidably supported along a frame portion slide rail, and the intermediate guide is axially mounted on the second link member so that the intermediate guide slides back and forth with one end of the second link member. 2. A high-floor truck according to claim 1, wherein the driven wheel rod has a dead end for insertion into the intermediate guide, and has a first fine crawler tension adjusting means for finely adjusting the position of the dead end. In addition to having the same effect as the crawler tension adjusting device, fine adjustment of the crawler belt tension can be easily performed by the first crawler tension fine adjusting means.

According to a third aspect of the present invention, there is provided a crawler belt tension adjusting device for a stilt type vehicle according to the first or second aspect, wherein the crawler belt tension adjusting device is directed toward a center side of the crawler belt. The crawler according to claim 1 or 2, further comprising a second fine crawler tension adjusting means for performing a dead end of the moving driven wheel rod and finely adjusting a position of the dead end. Has the same effect as the tension adjusting device, and since the amount of movement of the upper driven wheel with respect to the rise of the drive wheel is larger than an ideal value, the tension of the crawler belt is weakened when the loading platform is at a high position. , Fine adjustment of the tension of the crawler belt can be easily performed.

[Brief description of the drawings]

FIG. 1 is a right side view of a stilt-type truck equipped with a crawler belt tension adjusting device of the stilt-type truck according to the present invention, showing a state where a bed is at a low position.

FIG. 2 is a right side view of the stilt-type vehicle equipped with the crawler belt tension adjusting device of the stilt-type vehicle according to the present invention, showing a state where the loading platform is at a high position.

FIG. 3 is a sectional view taken along line XX of FIG. 1;

FIG. 4 is an explanatory diagram of an intermediate guide, a driven wheel rod, and a tension fine adjustment means of a first crawler.

FIG. 5 is an explanatory view of an intermediate guide, a driven wheel rod, and a tension fine adjustment means of a second crawler;

FIG. 6 is an explanatory view showing an embodiment in which the crawler belt tension adjusting device of the stilt type transport vehicle does not include the first crawler tension fine adjusting means.

FIG. 7 is a side view of a stilt-type carrier equipped with a carrier lifting device according to a conventional example.

FIG. 8 is a side view of a raised-floor carrier provided with a carrier lifting device in which an operation unit is provided on the carrier.

[Explanation of symbols]

 Reference Signs List 11 driven wheel rod 12 intermediate guide 14 first crawler tension fine adjustment means 16 second crawler tension fine adjustment means 20 crawler type traveling body 21 frame portion 24 drive wheel 25 crawler belt 26 crawler driven wheel 26a upper driven wheel 30 Loading platform 40 Loading platform lifting device 41 Loading section slide rail 42 Frame section sliding rail 43 First link member 44 Second link member 45 Approaching / separating means

Claims (3)

[Claims] 1. A raised-floor carrier comprising a carrier, a crawler-type traveling body, and a carrier elevating device installed between the carrier and a frame portion of the crawler-type traveling body, wherein the crawler comprises: A traveling vehicle, a driving wheel, a plurality of crawler driven wheels disposed on a ground contact surface, an upper driven wheel provided on an upper portion of the crawler traveling vehicle, the driving wheel, and the plurality of crawler driven wheels And a crawler belt attached so that the upper driven wheels are interlocked with each other, and the frame portion on which the plurality of crawler driven wheels are pivotally mounted, wherein the drive wheels are attached to the carrier, and the carrier elevating device A loading section slide rail provided on the loading platform with its longitudinal direction being the front-rear direction, a frame section slide rail provided on the frame section with its longitudinal direction being the forward-backward direction, and the loading section slide. A first end rotatably and slidably supported along the rail and the other end rotatably supported by the frame portion;
A link member, one end of which is rotatably and slidably supported along the frame portion slide rail, and the other end of which is rotatably supported by the carrier, and which is rotatably supported by the first link member at an intermediate position therebetween. The loading platform is provided by: a fitted second link member; and an approaching / separating means for approaching / separating an interval between ends of the first link member and the second link member in the loading platform or the frame portion. In a raised-floor carrier that is to be raised and lowered, a driven wheel rod having the upper driven wheel pivotally mounted on one end thereof,
The other end side is slidably supported along the frame portion slide rail, and the driven wheel rod is the second link member so that the driven wheel rod slides back and forth with one end of the second link member. A crawler belt tension adjusting device for a high-floor type carrier, wherein the device is attached to a shaft. 2. A high-floor truck comprising a carrier, a crawler-type traveling body, and a carrier elevating device installed between the carrier and a frame portion of the crawler-type traveling body, wherein the crawler comprises: A traveling vehicle, a driving wheel, a plurality of crawler driven wheels disposed on a ground contact surface, an upper driven wheel provided on an upper portion of the crawler traveling vehicle, the driving wheel, and the plurality of crawler driven wheels And a crawler belt attached so that the upper driven wheels are interlocked with each other, and the frame portion on which the plurality of crawler driven wheels are pivotally mounted, wherein the drive wheels are attached to the carrier, and the carrier elevating device A loading section slide rail provided on the loading platform with its longitudinal direction being the front-rear direction, a frame section slide rail provided on the frame section with its longitudinal direction being the forward-backward direction, and the loading section slide. A first end rotatably and slidably supported along the rail and the other end rotatably supported by the frame portion;
A link member, one end of which is rotatably and slidably supported along the frame portion slide rail, and the other end of which is rotatably supported by the carrier, and which is rotatably supported by the first link member at an intermediate position therebetween. The loading platform is provided by: a fitted second link member; and an approaching / separating means for approaching / separating an interval between ends of the first link member and the second link member in the loading platform or the frame portion. In a raised-floor carrier that is lifted and lowered, the other end side of a driven wheel rod having the upper driven wheel pivotally mounted on one end is slidably fitted into an intermediate guide, and the intermediate guide extends along the frame slide rail. The intermediate guide is pivotally mounted on the second link member so that the intermediate guide slides back and forth with one end of the second link member. A crawler belt for a high-floor type transport vehicle, comprising: a dead end of insertion of the driven wheel rod into the intermediate guide; and a first fine crawler tension adjusting means for finely adjusting the position of the dead end. Tension adjustment device. 3. The crawler belt tension adjusting device according to claim 1, wherein the driven wheel rod moving toward the center of the crawler belt has a dead end and the position of the dead end. A crawler belt tension adjusting device for a high-floor type transport vehicle, comprising a second crawler tension fine adjusting means for finely adjusting the crawler belt tension.