JP2002347672A - Crawler-type high floor truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crawler-type high floor track capable of easily adjusting a height of an upper part on which a load-carrying platform is mounted without the complex work such as the replacement of a crawler and the like, and easily adjusting the tension of the crawler after the adjustment of the height. SOLUTION: This high floor truck is provided with a lower frame 3, the upper frame 2 connected to the lower frame 3 in a state of being vertically adjustable to the lower frame 3, a drive wheel 4 supported on the upper frame 2, plural track idler rollers 5 supported on the lower frame 3, an adjustment roller 6 supported on the lower frame 3 in a state of being longitudinally adjustable to the lower frame 3, and the crawler 7 wound on the drive wheel 4, the track idler rollers 5, and the adjustment roller 6. The adjustment roller 6 is longitudinally movably connected to the lower frame 3, and supported by an adjustment frame 9 fixed to a predetermined position by a position adjustment means 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler-type high-floor truck used for harvesting agricultural products and the like, and in particular, to easily adjust the height of a loading platform according to the type of agricultural products and the cultivation method. The present invention relates to a crawler-type high-floor transporter capable of carrying out.

[0002]

2. Description of the Related Art For example, as shown in FIG. 11, a crawler that performs a harvesting operation on a crop 51 while running across a ridge 52 on which the crop 51 is growing, as shown in FIG. An elevated trolley 53 is known. Such a crawler type high floor transport vehicle 53
In order to travel across the ridges 52 on which the crops 51 are growing, it is necessary to secure a space for the ridges 52 and the crops 51 to pass between the left and right traveling devices 54. For this reason, the upper frame 55 that connects the left and right traveling devices 54 above and has a loading platform
The engine 56 is disposed on the upper frame 55, and only the minimum necessary components such as the speed reducer 57 and the drive wheel shaft 58 are disposed below the upper frame 55. Also,
Drive wheels 59 are provided at both ends of the drive wheel shaft 58,
The power of the engine 56 is transmitted to the crawler 60 via these speed reducers 57, drive wheel shafts 58 and drive wheels 59, and is driven to rotate.

[0003]

By the way, crops 51
Depending on the type and cultivation method, for example, when tall agricultural crops 51 are growing or when a greenhouse or the like (not shown) is provided, it is necessary to secure a space through which these can pass. , Upper frame 5 on which a loading platform is provided
5 needs to be arranged at a high position, but when a greenhouse or the like is not provided and a short crop 51 is growing, it is easier to perform the harvesting work if the height of the bed is lower. There is also. Therefore, the crawler type high floor transport vehicle 5
In order to improve the usability of No. 3, it is required that the height of the upper frame 55 on which the loading platform is provided can be adjusted.

However, the conventional crawler type high floor transport vehicle 53 has a configuration in which the engine 56 is disposed on the upper frame 55, and the reduction gear 57, the drive wheel shaft 58, and the drive wheel 59 are disposed therebelow. When the height of the upper frame 55 is moved, the position of the drive wheel 59 disposed integrally therewith also moves, and the positional relationship between the drive wheel 59 and the rolling wheel 61 disposed therebelow changes. It will be. Therefore, in order to adjust the height of the upper frame 55, it is necessary to replace the crawlers 60 wound around the driving wheels 59 and the rolling wheels 61 with ones having different circumferential lengths. It is not easy for the user to perform, and the work of adjusting the tension of the crawler 60 after replacement is not easy. Therefore, the crawler-type high-floor transport vehicle 53 having the above-described configuration and capable of adjusting the height of the upper frame 55 provided with the loading platform has hardly existed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and is intended to easily adjust the height of a cargo bed and the height of a space through which agricultural products and the like below the cargo bed pass according to the type of crop and the cultivation method. Therefore, the height of the upper frame on which the loading platform is provided can be adjusted by a simple operation without performing complicated operations such as replacing the crawler, and the tension adjustment of the crawler after the height adjustment is also simple. It is an object of the present invention to provide a crawler-type high-floor transporter that can be operated.

[0006]

The specific means for solving the above technical problems are as follows. That is, the crawler-type high-floor transport vehicle described in claim 1 includes a lower frame, an upper frame connected to the lower frame so as to be adjustable in a vertical direction, and a drive wheel supported by the upper frame. A plurality of rolling wheels supported by the lower frame, an adjustment wheel supported so as to be position adjustable in the front-rear direction with respect to the lower frame,
A crawler wound around the rolling wheel and the adjustment wheel.

According to a second aspect of the present invention, there is provided a crawler type high floor transport vehicle, wherein the adjusting wheel comprises:
It is characterized by being connected to the lower frame so as to be movable in the front-rear direction and supported by an adjustment frame fixed at a predetermined position by position adjustment means.

According to a third aspect of the present invention, there is provided a crawler type high floor transport vehicle according to the second aspect, wherein the adjusting wheel comprises:
It is characterized by being connected to the lower frame so as to be movable in the front-rear direction and supported by an adjustment frame fixed at a predetermined position by position adjustment means.

According to a fourth aspect of the present invention, there is provided a crawler-type high-floor transport vehicle according to any one of the first to third aspects, wherein the upper frame is disposed below lower left and right ends thereof. The frame includes two frame members connected to each other so as to be able to expand and contract in the left-right direction, and has a width adjusting unit that adjusts the amount of expansion and contraction in the left-right direction of the two frame members. It is characterized by the following.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a crawler type high floor transport vehicle according to the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a state in which the height of an upper frame 2 of a crawler type raised floor carrier 1 according to an embodiment of the present invention is adjusted to a high position, and FIG. 2 is a crawler according to an embodiment of the present invention. It is a side view which shows the state which adjusted the height of the upper frame 2 of the type high floor transport vehicle 1 to a low position. As shown in these figures,
The crawler type high floor transport vehicle 1 according to the present embodiment includes a lower frame 3, an upper frame 2 connected to the lower frame 3 so as to be adjustable in a vertical direction, and drive wheels supported by the upper frame 2. 4, a plurality of wheels 5 supported by the lower frame 3, an adjustment wheel 6 supported so as to be position adjustable in the front-rear direction with respect to the lower frame 3, a drive wheel 4, a wheel 5 and an adjustment wheel And a crawler 7 wound around the periphery of the crawler 6. This will be described in more detail below.

The lower frame 3 is a frame that connects and supports the upper frame 2 so that the upper frame 2 can be adjusted in the vertical direction above the lower frame 3, and also supports the rolling wheels 5 and the adjusting wheels 6 at predetermined positions. Here, a wheel supporting portion 8 that rotatably supports the four wheels 5, and the wheel supporting portion 8.
And an adjustment frame holding part 10 which is arranged above the adjustment frame 9 and movably holds the adjustment frame 9 in the front-rear direction. The adjustment frame holding part 10 is arranged above the adjustment frame holding part 10 and is connected to the upper frame 2 to support it from below. And a frame support portion 11.

The wheel supporting portion 8 is a frame portion for linearly arranging the four wheels 5 so that their lower ends are located on the same horizontal plane, and rotatably supporting them. Here, as shown in FIG. 3, which is a cross-sectional view taken along the line AA in FIG.
The lower surface is formed in a substantially U-shaped cross section with an open bottom, and is configured to sandwich the rotation shaft of each wheel 5 from both sides. The four rollers 5 supported by the roller supporting portion 8 hold the crawler 7 so as to be driven to rotate without being disengaged in a lower portion of the track thereof, and the crawler type high floor transport vehicle 1 It is for supporting weight.

The adjustment frame holding portion 10 is a frame portion for holding the adjustment frame 9 supporting the adjustment wheel 6 so as to be movable in the front-rear direction. Here, as shown in FIG. 3, it is formed in a tubular shape having a rectangular cross section, and is fixed to the upper surface of the wheel supporting portion 8. On the other hand, the adjustment frame 9 is inserted and held inside the adjustment frame holding portion 10, and slides inside the adjustment frame holding portion 10 so as to be movable in the front-rear direction to the lower frame 3. Connected. Here, it is formed in a tubular shape having a square cross section of a size that can be inserted with a small gap with respect to the inner peripheral surface of the adjustment frame holding portion 10 and is slidable by being inserted into the adjustment frame holding portion 10. Is held in. As shown in FIG. 2, a plurality of positioning holes 12 of a fixed size arranged at fixed intervals in the front-rear direction are formed on the side surface of the adjustment frame 9.
Are formed. An adjustment wheel support 13 is provided at the front end of the adjustment frame 9. The adjustment wheel support 13 is configured to rotatably support the adjustment wheel 6 by sandwiching the rotation shaft of the adjustment wheel 6 from both sides. Therefore, the adjustment wheel 6 is supported by the lower frame 3 so as to move integrally with the adjustment frame 9 in the front-rear direction. The adjusting wheel 6 adjusts the tension of the crawler 7 by adjusting the position in the front-rear direction by a position adjusting means 14 described later.

The adjusting frame 9 is provided with the position adjusting means 1.
4, the lower frame 3 is fixed at a predetermined position with respect to the adjustment frame holding portion 10 of the lower frame 3. This position adjusting means 14
As shown in FIG. 4 which is an enlarged view of a portion B in FIG. 1 and FIG. 5 which is a partial sectional view of FIG. 4, a fixing hole 15 is fitted on the adjustment frame 9 and at a height position corresponding to the positioning hole 12. A positioning member 16 formed, a fixing pin 17 inserted into the fixing hole 15 and any one of the positioning holes 12,
And fine adjustment means 18 for finely adjusting the position of the positioning member 16 with respect to the lower frame 3 in the front-rear direction.

The positioning member 16 is fixed to one of the positioning holes 12 of the adjustment frame 9 by a fixing pin 17, and is moved integrally with the adjustment frame 9 while moving in the front-rear direction by the fine adjustment means 18. This is a member whose position is finely adjusted. Here, the adjustment frame holding unit 1
It is formed into a short tube having the same cross-sectional shape as that of the adjusting frame 9 and is fitted on the adjusting frame 9. And positioning member 1
A fixing hole 15 having the same diameter as the positioning hole 12 is formed on a side surface of the adjustment frame 9 at a height position corresponding to the positioning hole 12 of the adjustment frame 9. Also, on the upper surface of the positioning member 16,
Although the tip receiving portion 19 of the fine adjustment means 18 is provided,
This will be described later.

The fixing pin 17 is inserted into the fixing hole 15 of the positioning member 16 and the positioning hole 12 of any of the adjusting frames 9 in a state where the center positions of the fixing pin 17 and the positioning hole 12 are aligned. These pins are fixed to the frame 9. Here, as shown in FIG. 6, a ring-shaped portion 21 for facilitating removal and insertion is formed at one end of a cylindrical main body 20 having an outer diameter slightly smaller than the inner diameter of the fixing hole 15 and the positioning hole 12. As shown in FIG. 7, an insertion hole 23 for inserting a snap pin 22 for preventing the fixing pin 17 from coming off is formed.

The fine adjustment means 18 is, as shown in FIGS. 4 and 5, a male screw having a constant pitch formed on the outer periphery of the columnar main body. An adjusting screw holding portion 25 provided on the upper surface near the front end of the adjusting frame holding portion 10 to rotatably hold the adjusting screw 24; and an adjusting screw 24 screwed to the adjusting screw 24 and being attached to the adjusting screw holding portion 25. A fixing nut 26 for fixing the position of the adjusting screw 24 is provided on the upper surface of the positioning member 16, and a tip end portion of an adjusting screw 24 is brought into contact with the fixing nut 26, and the tip receiving portion 19 which is pushed forward and moves as the adjusting screw 24 moves forward. And is configured. Therefore, according to the fine adjustment means 18, by rotating the adjustment screw 24 in a state where the fixing nut 26 is loosened, the tip receiving portion 1
9 can be moved in the front-rear direction to finely adjust the position of the positioning member 16 in the front-rear direction. After the fine adjustment of the position is completed, the fixing nut 26 is tightened to adjust the adjusting screw 2.
By fixing the position of 4, the position of the positioning member 16 can be fixed.

The frame support 11 of the lower frame 3 is
This is a frame portion that is connected to the upper frame 2 disposed above and supports it from below. Here, as shown in FIGS. 1 and 2, the upper part is formed in a substantially U-shape with an open top, and a horizontal part 28 that connects and reinforces vertical parts 27 at the front and rear thereof is a middle part in the height direction. And a lower portion thereof is fixed to the adjustment frame holding portion 10. At this time, as shown in FIG. 8 which is a rear view of the crawler type high floor transport vehicle 1, the frame support portion 11 is arranged outside the track of the crawler 7 and fixed. Although not shown in the figure, bolt insertion holes for inserting fixing bolts 29 for fixing the upper frame 2 are formed in the vicinity of the upper end of the vertical portion 27 before and after the frame support portion 11, respectively. . In FIGS. 1 and 2, the frame support portion 1 that overlaps with the adjustment wheel 6 and the fine adjustment means 18 is shown.
1 is omitted.

As shown in FIG. 8, the lower frame 3 and the rolling wheels 5, the adjusting wheels 6, the crawlers 7 and the like supported by the lower frame 3 are symmetrically arranged on the left and right sides of the crawler type high floor transport vehicle 1, respectively. ing. The upper frame 2 is a frame in which the lower frames 3 arranged below the left and right ends thereof are connected to each other at the upper side, and a loading platform is formed on the upper surface thereof. Here, as shown in FIGS. 1 and 2, a connection portion 30 connected to the vertical portion 27 in front and behind the frame support portion 11 of the lower frame 3 so as to be vertically adjustable, and As shown in FIG. 9 which is a plan view of the crawler-type high-floor carrier 1 supported at the upper end, a frame main body 31 forming a frame having a flat, substantially rectangular outer shape, a connection portion 30 to the lower frame 3, and And a height adjusting means 32 for adjusting the height of the frame main body 31.

The connection portion 30 of the upper frame 2 is a frame portion for connecting the frame main body 31 to the lower frame 3 so as to be vertically adjustable. here,
As shown in FIGS. 1 and 2, in order to connect to each of the front vertical portion 27 and the rear vertical portion 27 of the frame support portion 11, the front side and the rear side of the right and left sides of the frame main body 31 respectively. The two connecting portions 30 on the side extend downward. As shown in FIG. 10 which is a cross-sectional view taken along the line CC in FIG. 1, the connecting portion 30 has a front side and a rear side each open to the side where the horizontal portion 28 of the frame supporting portion 11 is provided. The front connection part 30 is formed in a U-shape, and the front connection part 30 is connected to the rear connection part 30 from the front of the vertical part 27.
Are fitted from the rear of the vertical portion 27, respectively. The connecting portion 30 is connected to the vertical portion 27 of the frame supporting portion 11.
, The vertical position of the upper frame 2 is adjusted.

Further, as shown in FIGS. 1 and 2, the connecting portion 30 is formed with a plurality of height positioning holes 33 of a predetermined size arranged at predetermined intervals in the vertical direction. Then, the center position of one of the height positioning holes 33 of the connection portion 30 is aligned with the center position of the bolt insertion hole of the frame support portion 11, and the fixing bolt 29 is inserted into these holes, thereby connecting the connection portion 30. Vertical part 2 of frame support 11
7 can be fixed. A nut is screwed into the tip of the inserted fixing bolt 29 to fix the fixing bolt 29.
Is fastened so as not to come off. At this time, the frame body 3
1 to horizontally support the four connecting portions 30 of front, rear, left and right
Use the same height positioning holes 33.

The height adjusting means 32 includes a height adjusting screw 34 in which male screws having a constant pitch are formed on the outer periphery of a cylindrical body having a long length, and a height adjusting screw 34 on both left and right sides of the frame main body 31. A height adjusting screw holding portion 35 for holding rotatably while restricting vertical movement, and a horizontal portion 28 of the frame supporting portion 11 at a vertically lower position of the height adjusting screw holding portion 35 are provided therein. And a height adjusting screw thread portion 36 in which a female screw to be screwed with the height adjusting screw 34 is formed. The upper end 37 of the height adjusting screw 34 is formed in a hexagonal column shape, and the height adjusting screw 34 can be easily rotated by rotating this portion using a tool such as a spanner. It has become. According to such a height adjusting means 32, by rotating the height adjusting screw 34, the distance between the height adjusting screw holding portion 35 and the height adjusting screw screw portion 36 is adjusted, and the upper frame is adjusted. 2 can be easily moved up to a high position (see FIG. 1) or lowered to a low position (see FIG. 2). Therefore, even when there is only one worker, the left and right height adjustment screws 3
The height of the upper frame 2 can be easily adjusted by rotating the upper frame 4 alternately.

The frame main body 31 of the upper frame 2 connects the lower frames 3 arranged below the left and right ends thereof to each other via the connecting portion 30 to the left and right. As shown in FIG. 9, a frame having a flat and substantially rectangular outer shape is formed on the upper end of the connecting portion 30, and a loading platform is formed on the upper surface thereof. Here, the frame body 31
Is composed of two frame members, a right frame 38 and a left frame 39, which are connected to be able to expand and contract in the left-right direction, that is, in the width direction of the crawler type high floor transport vehicle 1. The connection structure between the right frame 38 and the left frame 39 is as follows. That is, in the right frame 38, four hollow circular tubular guides 40 long in the left-right direction are arranged in parallel, and the left frame 39
In the position corresponding to the guide 40, four rods 41 slidably fitted inside the guide 40 are arranged in parallel, and these guides 40 and the rods 41 are slidably fitted to each other. Thereby, the right frame 38 and the left frame 39 of the frame main body 31 are connected to be able to expand and contract in the left-right direction.

The upper frame 2 is connected to the right frame 3
8 and a width adjusting means 42 for adjusting the amount of expansion and contraction of the left frame 39 in the left-right direction. This width adjusting means 42
A male screw having a constant pitch is formed on the outer periphery of the cylindrical body having a long length, and a width adjusting screw 43 disposed along a central axis of one guide 40 of the right frame 38;
8 is a width adjusting screw holding part 4 that holds the width adjusting screw 43 rotatably while restricting the lateral movement of the width adjusting screw 43.
4, and a width adjusting screw screwing portion 45 formed by a female screw that is screwed with the width adjusting screw 43 formed along the central axis of the rod 41 fitted into the guide 40 in which the width adjusting screw 43 is provided. Is configured. The right end 46 of the width adjusting screw 43 is formed in a hexagonal column shape, and the width adjusting screw 43 is rotated by using a tool such as a spanner so that the width adjusting screw 43 can be easily rotated. Has become. According to the width adjusting means 42, the right frame 38 is rotated by rotating the width adjusting screw 43.
Rod 4 of the left frame 39 fitted into the guide 40
By adjusting the amount of insertion of the first frame 1, the amount of expansion and contraction of the right frame 38 and the left frame 39 in the left-right direction can be easily adjusted. Therefore, as shown in FIG. 11, when running across the ridges 52 where the crops 51 are growing, the interval between the crawlers 7 can be easily adjusted according to the width of the ridges 52.

As shown in FIG. 1, FIG. 2 and FIG. 8, the engine 47 of the crawler type high floor transport vehicle 1 is disposed on the upper surface of the frame main body 31 of the upper frame 2, and the frame below the engine 47 A reducer 48 is arranged on the lower surface of the main body 31. As shown in FIGS. 8 and 9, a drive wheel shaft 49 is disposed in the left and right direction through the speed reducer 48, and the rolling wheel 5 supported by the lower frame 3 in the left and right direction of the drive wheel shaft 49 is provided. The drive wheel 4 is connected to a position above the drive wheel. At this time, the right driving wheel 4
Is simply fixed to the drive wheel shaft 49 as usual, but the left drive wheel 4 is integrated according to the left frame 39 when the right frame 38 and the left frame 39 of the frame body 31 are expanded and contracted in the left-right direction. Since it is necessary to move the driving wheel shaft 49 in the horizontal direction, it is slidably connected to the driving wheel shaft 49. Therefore, here, the speed reducer 48
The left drive wheel shaft 49 has a polygonal cross section such as a hexagonal prism, the left drive wheel 4 is rotatably supported below the left frame 39, and the cross section of the drive wheel shaft 49 is formed at the center of the left drive wheel 4. To form a polygonal insertion hole of the same shape as
The drive wheel axle 49 is slidably fitted in the insertion hole. Left and right driving wheels 4 configured as described above
Is connected to an engine 47 via a drive wheel shaft 49 and a speed reducer 48.
And the crawler 7 wound around the driving wheel 4, the rolling wheel 5, and the adjusting wheel 6 is rotated.
A loading platform is formed on the upper surface of the frame main body 31 at a portion in front of the engine 47.

Next, a method of adjusting the height of the upper frame 2 of the crawler type high floor transport vehicle 1 according to the embodiment of the present invention and a method of adjusting the tension of the crawler 7 at that time will be described with reference to FIGS. . When adjusting the height of the upper frame 2, first remove the snap pins 22 (see FIG. 7),
Withdrawing the fixing pin 17, the adjusting frame 9 and the adjusting wheel 6 are removed.
Are freely movable in the front-rear direction. In addition, the adjustment screw 24 of the fine adjustment means 18 is rotated and moved backward. As a result, the crawler 7 is not stretched, so that the fixing bolts 29 for fixing the connecting portion 30 of the upper frame 2 and the frame supporting portion 11 of the lower frame 3 are then moved to all four positions in front, rear, left and right. Remove. After that, the height of the upper frame 2 is adjusted by rotating the right and left height adjusting screws 34 of the height adjusting means 32. At this time, the height is adjusted so that the center position of any height positioning hole 33 of the connection portion 30 matches the center position of the bolt insertion hole formed in the vertical portion 27 of the frame support portion 11.

After the upper frame 2 is adjusted to an appropriate height in this way, the fixing bolt 29 is inserted into the height positioning hole 33 and the bolt insertion hole and fastened with a nut to connect the upper frame 2. The part 30 and the frame supporting part 11 of the lower frame 3 are fixed to each other. Next, the adjusting wheel 6 and the adjusting frame 9 are moved forward to make the crawler 7 in a stretched state, and the center positions of the fixing hole 15 of the positioning member 16 and the positioning hole 12 of the adjusting frame 9 closest thereto are adjusted. The fixing pins 17 are inserted so as to match. In addition, the snap pin 22 is inserted into the insertion hole 23 at the tip of the fixed pin 17 after insertion so that the fixed pin 17 does not come off, and the positioning member 16 is fixed to the adjustment frame 9.
Thereafter, the fixing nut 26 of the fine adjustment means 18 is loosened, and the adjustment screw 24 is rotated to finely adjust the position of the positioning member 16 in the front and rear direction, thereby finely adjusting the position of the adjustment frame 9 and the adjustment wheel 6 in the front and rear direction. Then, the tension of the crawler 7 is adjusted. After adjusting the crawler 7 so that the tension of the crawler 7 becomes appropriate, the position of the adjustment screw 24 is fixed by tightening the fixing nut 26, and the position of the adjustment frame 9 and the adjustment wheel 6 in the front-rear direction is fixed. According to the above, by adjusting the height of the upper frame 2, even if the height of the driving wheel 4 moving integrally with the upper frame 2 changes, the adjusting wheel 6 is moved in the front-rear direction. By adjusting the position, the circumferential length of the crawler 7 can be kept constant, and the tension of the crawler 7 can be appropriately adjusted.

[0028]

As described above, according to the first aspect of the present invention,
According to the crawler type high floor transport vehicle according to the present invention, the lower frame, the upper frame connected to the lower frame so that the position can be adjusted in the vertical direction, the drive wheel supported by the upper frame, and the support by the lower frame By providing a plurality of rolling wheels, an adjusting wheel supported so that the position can be adjusted in the front-rear direction with respect to the lower frame, and a crawler wound around these driving wheels, the rolling wheels and the adjusting wheel. Even if the height of the drive wheel that moves integrally with the upper frame changes by adjusting the height of the upper frame, the circumferential length of the crawler is kept constant by adjusting the position of the adjustment wheel in the front-rear direction. And the crawler tension can be adjusted appropriately. Therefore, the height of the upper frame on which the loading platform is provided can be adjusted by a simple operation without performing complicated operations such as replacing crawlers, and the height of the loading platform can be easily adjusted according to the type of crop and the cultivation method. The height of the space through which crops and the like under the pod pass can be adjusted.

According to the crawler-type high-floor carrier according to a second aspect of the present invention, in addition to the above-described effects, the adjusting wheel is connected to the lower frame so as to be movable in the front-rear direction and the position is adjusted. Since the adjustment wheel is supported by the adjustment frame fixed at a predetermined position by the means, the adjustment of the adjustment wheel in the front-rear direction can be performed only by adjusting the position of the adjustment frame in the front-rear direction. It can be configured at low cost.

According to the crawler type high floor transport vehicle according to claim 3 of the present invention, in addition to the above effects, the adjusting frame has a plurality of positioning holes formed at regular intervals in the front-rear direction. The position adjustment means is a positioning member which is fitted to the adjustment frame and has a fixing hole formed at a height corresponding to the positioning hole, and a fixing pin inserted through the fixing hole and any one of the positioning holes. By having fine adjustment means for finely adjusting the position of the positioning member in the front-rear direction with respect to the lower frame, after determining the approximate position of the adjustment wheel in the front-rear direction by the fixing pin,
Since the position can be finely adjusted by the fine adjustment means, the tension adjustment of the crawler after the height adjustment of the upper frame can be appropriately performed by a simple operation.

According to the crawler-type high-floor carrier according to a fourth aspect of the present invention, in addition to the above-described effects, the upper frame connects the lower frames arranged below the left and right ends thereof to each other. And a width adjusting means for adjusting the amount of expansion and contraction of the two frame members in the left-right direction while being constituted by two frame members connected to be able to expand and contract in the left-right direction. Because it is possible to easily adjust the crawler spacing, when running across the ridges where crops are growing,
The crawler spacing can be adjusted according to the width of the ridge for use.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which the height of an upper frame of a crawler type high floor transport vehicle according to an embodiment of the present invention is adjusted to a high position.

FIG. 2 is a side view showing a state in which the height of an upper frame of the crawler type high floor transport vehicle according to the embodiment of the present invention is adjusted to a low position.

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

FIG. 4 is an enlarged view of a portion B in FIG. 1;

FIG. 5 is a partial sectional view of FIG. 4;

FIG. 6 is a side view of a fixing pin of a position adjusting unit of the crawler type high floor transport vehicle according to the embodiment of the present invention.

FIG. 7 is a view showing a state in which a snap pin is inserted into a tip of a fixing pin of the crawler type raised floor carrier according to the embodiment of the present invention.

FIG. 8 is a rear view of the crawler type high floor transport vehicle according to the embodiment of the present invention.

FIG. 9 is a plan view of a crawler type high floor transport vehicle according to the embodiment of the present invention.

FIG. 10 is a sectional view taken along line CC of FIG. 1;

FIG. 11 is a rear view of a crawler type high floor transport vehicle according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crawler type high floor transport vehicle 2 Upper frame 3 Lower frame 4 Drive wheel 5 Roller wheel 6 Adjustment wheel 7 Crawler 8 Roller wheel support 9 Adjustment frame 10 Adjustment frame holder 11 Frame support 12 Positioning hole 14 Position adjustment means 16 Positioning member Reference Signs List 17 fixing pin 18 fine adjustment means 19 tip receiving part 24 adjustment screw 25 adjustment screw holding part 26 fixing nut 29 fixing bolt 30 connection part of upper frame 31 frame body of upper frame 32 height adjustment means 33 height positioning hole 34 height Adjusting screw 38 Right frame 39 Left frame 40 Guide 41 Rod 42 Width adjusting means 43 Width adjusting screw 47 Engine 48 Reduction gear 49 Drive wheel axle

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B62D 55/30 B62D 55/30 B

Claims (4)

[Claims] 1. A lower frame, an upper frame connected to the lower frame so as to be vertically adjustable, a drive wheel supported by the upper frame, and a plurality of wheels supported by the lower frame. A wheel, an adjusting wheel supported so as to be position adjustable in the front-rear direction with respect to the lower frame, and a crawler wound around the driving wheel, the rolling wheel, and the adjusting wheel. Crawler type high floor transporter. 2. The adjusting wheel is connected to the lower frame so as to be movable in the front-rear direction and supported by an adjusting frame fixed at a predetermined position by a position adjusting means. The described crawler-type raised floor transport vehicle. 3. The adjusting frame has a plurality of positioning holes formed at regular intervals in the front-rear direction, and the position adjusting means is externally fitted to the adjusting frame and has a height corresponding to the positioning holes. A positioning member having a fixing hole formed at a position, a fixing pin inserted into the fixing hole and any one of the positioning holes, and fine adjustment means for finely adjusting the position of the positioning member in the front-rear direction with respect to the lower frame. The crawler-type high-floor transporter according to claim 2, comprising: 4. The upper frame connects the lower frames disposed below right and left ends thereof to each other, and is constituted by two frame members connected to be extendable and contractible in the left-right direction. The crawler-type high floor transport vehicle according to any one of claims 1 to 3, further comprising a width adjusting means for adjusting an amount of expansion and contraction of the two frame members in the left-right direction.