JP6946366B2 - Rolling vehicle - Google Patents

Description

The present invention relates to a compaction vehicle, and more particularly to a compaction vehicle provided with a compaction wheel and a water storage tank for storing water for watering the road surface.

Rolling vehicles such as vibrating rollers and tire rollers of this type are made of gravel or gravel laid on the roadbed or roadbed while traveling by the front and rear rolling wheels that also serve as running wheels provided in the front and rear of the vehicle body. Carry out work to compact pavement materials such as asphalt. During pavement work, water is sprinkled on the front and rear compaction wheels and the road surface for the purpose of preventing the paving material from adhering to the compaction wheels or cooling the pavement material after compaction. In order to store a large amount of water used for these purposes, the compaction vehicle is equipped with a water storage tank (see, for example, Patent Document 1).

The compaction vehicle described in Patent Document 1 is formed by connecting a front vehicle body and a rear vehicle body via an articulating mechanism. The water storage tank is mounted on the rear vehicle body and is arranged in the tank accommodating portion opened above the vehicle body frame. As the body frame of such a rear vehicle body, for example, the following structure is adopted.

The vehicle body frame consists of a main frame portion provided with a rear compaction wheel, left and right frame portions forming the left and right surfaces of the vehicle body frame, and a rear frame portion forming the rear surface of the vehicle body frame, each of which is made of steel plate. NS. The left and right frame portions are welded to both sides of the main frame portion, and the rear frame portion is welded to the rear side of the main frame portion. On the bottom wall facing upward of the main frame portion, a tank accommodating portion surrounded by each frame portion from the left and right sides and the rear is formed, and a water storage tank is arranged in this tank accommodating portion.

Japanese Unexamined Patent Publication No. 9-59914

However, in the frame structure of the compaction vehicle of Patent Document 1, there is still room for improvement in the rigidity and assembly accuracy of the vehicle body frame.
That is, since the left and right surfaces of the vehicle body frame are formed by the left and right frame portions and the rear surface of the vehicle body frame is formed by the rear frame portion, the left and right ends of the rear frame portion and the rear ends of the left and right frame portions are formed. And will be welded respectively. As a result, two weld points are formed at the left and right corners of the rear portion of the vehicle body frame.
However, the decrease in strength due to welding causes a decrease in the rigidity of the vehicle body frame, and the joining accuracy of the welding itself is low and distortion occurs due to welding heat. It may not be possible to keep it. Further, as the number of welded parts increases, the number of parts increases, which is disadvantageous in terms of manufacturing cost. Therefore, there has been a demand from the past to reduce the number of welded parts.

The present invention has been made to solve such a problem, and an object of the present invention is to reduce the number of parts of the frame portion constituting the vehicle body frame to reduce the manufacturing cost, and then to reduce the manufacturing cost of the welded portion. It is possible to prevent the decrease in rigidity of the vehicle body frame due to the decrease in strength, and to avoid the decrease in assembly accuracy due to welding error due to welding and distortion due to welding heat, and to realize the desired accurate frame shape. The purpose is to provide a compaction vehicle that can.

In order to achieve the above object, in the compaction vehicle of the present invention, the left and right frame portions forming the left side surface and the right side surface of the vehicle body frame are welded to the left and right sides of the main frame portion provided with the rear compaction wheel, respectively. At the same time, the rear frame portion forming the rear surface of the vehicle body frame is welded to the rear side of the main frame to form the vehicle body frame, and the left and right frames are upward from the bottom wall facing above the main frame portion. One piece in a compaction vehicle in which a portion and the rear frame portion are respectively extended to form a tank accommodating portion surrounded on the bottom wall from the left and right sides and from the rear, and a water storage tank is arranged. The left rear frame portion and the left rear frame portion corresponding to the left region of the rear frame portion are formed from the steel plate of the above, and are bent at the boundary line between the left rear frame portions to be formed as one member. The side frame molding material, the left rib surface formed by bending the upper edge of the left frame portion to the right, and the upper edge of the left rear frame portion are formed by bending forward, and the left end. The left rear rib surface welded to the rear end of the left rib surface and the right rear frame portion corresponding to the right region of the right frame portion and the rear frame portion are formed from one steel plate. , A right rear frame molding material manufactured as one member by being bent at the boundary line between each other, and a right rib surface formed by bending the upper edge of the right frame portion to the left. The upper edge of the right rear frame portion is formed by being bent forward, and the right end is provided with a right rear rib surface welded to the rear end of the right rear rib surface, and the left end is provided with respect to the main frame. The rear frame molding material and the right rear frame molding material are arranged at regular positions and welded to the main frame portion, respectively, and the right end edge of the left rear frame portion and the right end edge of the left rear rib surface and the said. The left end edge of the right rear frame portion and the left end edge of the right rear rib surface are welded to each other on the rear side of the main frame.

According to the compaction vehicle of the present invention, it is possible to reduce the number of parts of the frame portion constituting the vehicle body frame to reduce the manufacturing cost and prevent the decrease in the rigidity of the vehicle body frame due to the decrease in the strength of the welded portion. At the same time, it is possible to realize the desired accurate frame shape by avoiding a decrease in assembly accuracy due to welding error due to welding and distortion due to welding heat.

It is a side view which shows the combined vibrating roller of an embodiment. It is a perspective view which shows the rear vehicle body. It is also an exploded perspective view. It is a view of arrow A of FIG. 2 which shows the relationship between a water storage tank and a driver's seat. Similarly, it is a cross-sectional view taken along the line VV of FIG. It is an exploded perspective view which shows the body frame.

Hereinafter, an embodiment in which the present invention is embodied in a combined vibrating roller will be described.
FIG. 1 is a side view showing the combined vibrating roller of the present embodiment, and in the following description, the front-rear direction and the left-right direction are expressed with reference to the vehicle.

The vehicle body of the combined vibrating roller 1 (hereinafter, also referred to as vehicle 1) is composed of a front vehicle body 4 having a front compaction wheel 2 and a rear vehicle body 5 having a rear compaction wheel 3. .. These vehicle bodies 4 and 5 are connected via an articulating mechanism 6, and the front and rear vehicle bodies 4 and 5 centering on the articulating mechanism 6 are driven by a steering cylinder (not shown) provided on the front vehicle body 4. The vehicle 1 is steered by bending in the horizontal direction.

The front compaction wheel 2 is composed of a metal drum having a length substantially corresponding to the vehicle width, and is rotatably supported by a pair of left and right support arms 7 extending downward from the front vehicle body 4. Further, the rear compaction wheel 3 is composed of a total of four rubber tires, two on each side, and is rotatably supported by an axle (not shown) provided on the rear vehicle body 5. These front and rear compaction wheels 2 and 3 are driven by a traveling hydraulic motor (not shown), and the vehicle 1 travels while compacting the road surface by the respective compaction wheels 2 and 3.

An operation table 9 provided with a steering 8 is installed at a front position on the rear vehicle body 5, and a bench-type driver's seat 10 is installed behind the operation table 9. In the compaction work, the operator sits on the driver's seat 10 and operates the steering 8 and the forward / backward lever 11 of the operation table 9, the pedal 12 at the foot, and the like. In response to these operations, the steering cylinder and the hydraulic motor are operated to steer and run the vehicle 1.

A water storage tank 13 is mounted at the rearmost portion on the rear vehicle body 5 corresponding to the rear side of the driver's seat 10. The water storage tank 13 is piped with rolling wheel watering nozzles 14f and 14r arranged in the vicinity of the front and rear rolling wheels 2 and 3 and a road surface watering nozzle (not shown) arranged at the rear end of the rear vehicle body 5. And connected via a water pump. During pavement work, the water stored in the water storage tank 13 is sprinkled by a water supply pump for the purpose of preventing the pavement material from adhering to the front and rear compaction wheels 2 and 3 or cooling the pavement material after compaction. It is supplied to the nozzles 14f and 14r and watered to the front and rear compaction wheels 2 and 3 and the road surface.

FIG. 2 is a perspective view showing the rear vehicle body 5, FIG. 3 is an exploded perspective view, FIG. 4 is an arrow view of A showing the relationship between the water storage tank 13 and the driver's seat 10, and FIG. 5 is a VV of FIG. It is a line sectional view.
First, the vehicle body frame structure of the rear vehicle body 5 will be described with reference to FIGS. 3 to 5. The vehicle body frame 16 is composed of a main frame portion 17, a left frame portion 18, a right frame portion 19, and a rear frame portion 20. A square bottom wall 17a facing upward is formed in the main frame portion 17, and the front end of the bottom wall 17a is bent downward to form a front wall 17b facing slightly upward in the front.

A rectangular parallelepiped frame body 17c is welded to the front wall 17b, a floor material (not shown) located at the feet of the operator is fixed on the frame body 17c, and an operation table 9 and the like are installed. The main frame portion 17 is connected to the front vehicle body 4 side via an articulating mechanism 6 (shown in FIG. 1) provided on the frame body 17c. As shown in FIGS. 4 and 5, an axle support portion 21 is welded below the bottom wall 17a and behind the front wall 17b, and a rear rolling wheel 3 is supported by the axle support portion 21 by a hydraulic motor (not shown). It is designed to be rotationally driven.

As shown in FIGS. 3 and 4, left and right frame portions 18 and 19 forming the left side surface and the right side surface of the vehicle body frame 16 are arranged on the left and right sides of the main frame portion 17 configured as described above, respectively. There is. The left frame portion 18 is welded to the left end edges of the bottom wall 17a and the front wall 17b of the main frame portion 17, and the right frame portion 19 is welded to the right edge of the bottom wall 17a and the front wall 17b. Arc notch portions 18a and 19a corresponding to the rear compaction wheel 3 are formed in 18 and 19.
A rear frame portion 20 that forms the rear surface of the vehicle body frame 16 is arranged on the rear side of the main frame portion 17, the lower edge thereof is welded to the trailing edge of the bottom wall 17a of the main frame portion 17, and the left and right end edges are on the left side. And right-angled and continuous with the trailing edges of the right frame portions 18 and 19. The relationship between the left and right frame portions 18 and 19 and the rear frame portion 20 is a characteristic portion of the present invention, and details thereof will be described later.

The left and right frame portions 18 and 19 and the rear frame portion 20 extend upward from the bottom wall 17a of the main frame portion 17, whereby the frame portions 18 to 20 laterally extend on the bottom wall 17a. And a tank accommodating portion 22 which is surrounded from the rear and is open upward and forward is formed.

The upper edges of the left and right frame portions 18 and 19 extend linearly in the front-rear direction, respectively, and the upper edge of the left frame portion 18 is bent at a right angle to the right and has a left rib surface 18b facing upward. The upper edge of the right frame portion 19 is bent at a right angle to the left to form a right rib surface 19b facing upward. Further, the upper edge of the rear frame portion 20 extends linearly in the left-right direction and is bent at a right angle to the front to form a rear rib surface 20a facing upward. The left and right ends of the rear rib surface 20a are welded to the rear ends of the left and right rib surfaces 18b and 19b, respectively.

As shown in FIGS. 3 and 5, the left and right frame portions 18 and 19 extend forward from the front wall 17b of the main frame portion 17, and their front edges extend linearly in the vertical direction. The leading edge of the left frame portion 18 is bent at a right angle to the right to form a left front rib surface 18c facing slightly upward, and the leading edge of the right frame portion 19 is bent at a right angle to the left. The right front rib surface 19c facing slightly upward from the front is formed. These left front and right front rib surfaces 18c and 19c are separated forward from the front wall 17b of the main frame portion 17, and are sandwiched between the left front and right front rib surfaces 18c and 19c on the front side of the front wall 17b. An extended space 23 (shown in FIG. 5) is formed. The upper end of the left front rib surface 18c is welded to the left end rib surface 18b to the front end, and the upper end of the right front rib surface 19c is welded to the right end rib surface 19b to the front end.

The vehicle body frame 16 of the rear vehicle body is configured as described above, and the water storage tank 13 is arranged in the tank accommodating portion 22 formed on the bottom wall 17a thereof. The water storage tank 13 is made of a synthetic resin material, and is composed of a lower tank 25 housed in the tank housing 22 as a whole and an upper tank 26 protruding upward from the tank housing 22, and the water storage tank 13 cooperates with each other. It forms an internal space.

The lower tank 25 has a substantially rectangular parallelepiped shape corresponding to the shape of the tank accommodating portion 22, and its upper surface 25a is located at substantially the same height as the left and right rib surfaces 18b and 19b and the rear rib surface 20a of the vehicle body frame 16. ing. The front portion of the lower tank 25 extends forward and downward from above the bottom wall 17a of the vehicle body frame 16, and this portion is hereinafter referred to as an expansion region 25b. The expansion region 25b is arranged in the expansion space 23 formed on the front side of the front wall 17b shown in FIG. 5, and from the water storage tank 13 to the watering nozzles 14f and 14r via the connection portion 25c provided on the lower left side thereof. Water is being supplied.

The water storage tank 13 is inserted and arranged in the tank accommodating portion 22 from the front, and the lower tank 25 is provided in the left-right direction and by a pair of right-angled left and right regulation plates 27 welded on the bottom wall 17a of the vehicle body frame 16. Movement to the rear is restricted. Further, the lower tank 25 is restricted from moving forward and upward by a fixing bracket (not shown), whereby the lower tank 25 is positioned and fixed in the tank accommodating portion 22. As shown in FIGS. It is formed. As shown in FIG. 4, these communication passages 28 and 29 are arranged with a hose 30 for supplying water to the rear compaction wheel watering nozzle 14r, or lights (not shown) attached to the rear frame portion 20 and the like. It is used for allocating harnesses to.

From the rear part of the upper surface of the lower tank 25 of the water storage tank 13, the upper tank 26 is continuously formed upward. The upper tank 26 has a shape that protrudes upward from the inside of the tank accommodating portion 22 and extends rearward, and a supply port 31 for water supply is provided on the upper surface of the upper tank 26.

A seat unit 32 including the driver's seat 10 is arranged at an upper position of the lower tank 25 of the water storage tank 13 and at a position on the front side of the upper tank 26. The seat unit 32 has a driver's seat 10 mounted on a base plate 33 in a horizontal posture via a seat rail 34, and armrests 35 are fixed to both left and right sides of the driver's seat 10. The base plate 33 is bridged between the left side frame portion 18 and the right side frame portion 19 of the vehicle body frame 16, and both the left and right sides thereof are fixed on the left side portion and the right side portion rib surfaces 18b and 19b via the anti-vibration rubber 36. Has been done.

There is an optimum height of the driver's seat 10 to ensure a view that is easy for the operator to work on, and the vertical position of the base plate 33, and thus the left and right ribs, so that the driver's seat 10 can be supported at that height. The vertical positions of the surfaces 18b and 19b are set. Then, since the lower tank 25 is accommodated in the space (= tank accommodating portion 22) defined between the base plate 33 and the bottom wall 17a of the vehicle body frame 16, interference with the lower surface of the base plate 33 is avoided. In addition, the volume of the water storage tank 13 is expanded by setting the maximum vertical dimension of the lower tank 25.

By the way, as described in [Problems to be Solved by the Invention], in the frame structure of Patent Document 1, welded portions are formed at two points on the left and right corners of the vehicle body frame. For this reason, the rigidity of the vehicle body frame is reduced due to the decrease in the strength of the welded portion, and the assembly accuracy is reduced due to the joining error due to welding and the distortion of the welding heat, so that an accurate frame shape cannot be realized, and the number of parts is increased. There is a problem that the increase is disadvantageous in terms of cost.
Therefore, in the present embodiment, measures are taken to reduce the number of welded parts to one point and change the position of the welded parts, and the details thereof will be described below.

FIG. 6 is an exploded perspective view showing the vehicle body frame 16, and as shown in this figure, the left side frame portion 18 and the left half region of the rear side frame portion 20 are formed by punching one steel plate into a predetermined shape by pressing. It is manufactured as one member (hereinafter, referred to as a left rear frame molding material 38l) by being formed by bending at a right angle at a boundary line with each other. The left rib surface 18b is bent on the upper edge of the left frame portion 18, the left front rib surface 18c is bent on the front edge, and the upper edge of the left half region of the rear frame portion 20 is formed. The rear rib surface 20a is bent and molded, and the ends of each are welded to each other.

The same applies to the area of the right half of the right frame portion 19 and the rear frame portion 20, and one steel plate is punched into a predetermined shape by a press and formed, and then bent at right angles at the boundaries of each other. As a result, it is manufactured as one member (hereinafter, referred to as a right rear frame molding material 38r). The right rib surface 19b is bent on the upper edge of the right frame portion 19, the right front rib surface 19c is bent on the front edge, and the upper edge of the right half region of the rear frame portion 20 is formed. The rear rib surface 20a is bent and molded, and the ends of each are welded to each other.

Hereinafter, for convenience of explanation, the left half region of the rear frame portion 20 is distinguished as the left rear frame portion 20l, and the right half region is defined as the right rear frame portion 20r, and the rear frame portion 20 is formed in the left rear frame portion 20l. The rear rib surface 20a is distinguished as the left rear rib surface 20al, and the rear rib surface 20a formed on the right rear frame portion 20r is distinguished as the right rear rib surface 20ar.

The left rear side and right rear side frame molding materials 38l and 38r are arranged at regular positions with respect to the main frame portion 17, and are welded to each portion of the main frame portion 17 as described above. The right end edge of the left rear frame portion 20l of the left rear frame molding material 38l and the left end edge of the right rear frame portion 20r of the right rear frame molding material 38r are in the left-right direction on the rear side of the main frame portion 17. They are abutted against each other and welded at the center position of. Further, the right end edge of the left rear rib surface 20al of the left rear frame forming material 38l and the left end edge of the right rear rib surface 20ar of the right rear frame forming material 38r are also abutted against each other and welded, whereby the rear frame portion 20 is welded. And the rear rib surface 20a is formed.

Since the tow hook 39 (shown in FIG. 5) is welded on the bottom wall 17a of the main frame portion 17 at this abutting position, the cross-sectional shape of the tow hook 39 is formed on the left rear and right rear rib surfaces 20al and 20ar. A notch 40 corresponding to the above is formed and is also welded to the tow hook 39.

As can be seen from the above description, the left rear side and right rear side frame molding materials 38l and 38r of the present embodiment are folded without welding being applied to the left and right corners of the vehicle body frame 16, respectively. It is manufactured as one member by forming a bend. Then, the three members of the frame structure of Patent Document 1 (the left and right frame portions and the rear frame portion) are reduced to two members, the left rear side and the right rear side frame molding materials 38l and 38r, in the present embodiment. Man-hours can be reduced and manufacturing costs can be reduced.

Further, instead of the two welded points at the left and right corners of the vehicle body frame 16 of Patent Document 1, in the present embodiment, the welded parts are formed only at one point at the center of the left and right sides on the rear side of the rear frame portion 20. NS. As a result, the number of welded parts is reduced, so that the influence of welding to the vehicle body frame 16 is reduced. Specifically, it is possible to prevent a decrease in rigidity of the vehicle body frame 16 due to a decrease in strength due to welding. In addition, since it is possible to avoid a decrease in assembly accuracy due to welding error due to welding and distortion due to welding heat, it is possible to realize the desired accurate frame shape.

Moreover, in addition to the above advantages, the position of the welded portion has been changed to a position that does not adversely affect the vehicle body frame 16.
That is, in the frame structure of Patent Document 1, welded portions are formed at the left and right corners of the rear portion of the vehicle body frame, and these left and right corners are important to greatly affect the rigidity and assembly accuracy of the vehicle body frame. It is a part. Therefore, if the left and right corners are welded, the strength may inevitably decrease and the rigidity of the vehicle body frame may decrease. Further, since distortion due to welding heat is generated at the left and right corners of the vehicle body frame, the assembly accuracy may be lowered and the desired accurate frame shape may not be realized.

On the other hand, in the present embodiment, the left and right centers of the rear frame portion 20 to be welded are the portions forming the flat rear surface of the vehicle body frame 16. Therefore, even if welding is applied to this portion to cause a decrease in strength, a joining error, a distortion, or the like, the influence on the vehicle body frame 16 is far less than that in the case of the left and right corner portions. Therefore, even if the strength of the left and right centers of the rear frame portion 20 is reduced by welding, the rigidity of the vehicle body frame 16 is not so reduced, and even if distortion due to joining error or welding heat occurs, good assembly accuracy is ensured. Will be done.

Welded portions are not formed on the left and right ends of the rear frame portion 20, which greatly affects the rigidity and assembly accuracy, in the vehicle body frame 16 of the present embodiment. Instead, the left and right frame portions 18, 19 It is bent at the boundary with. Therefore, the rear frame portion 20 and the left and right frame portions 18 and 19 are seamlessly continuous, and the original strength of the steel plate as the material, in other words, the strength higher than that of welding is maintained. Further, since the distortion of thermal deformation due to welding heat does not occur, the joining accuracy is improved. Therefore, since it is possible to prevent the strength of the left and right corners of the vehicle body frame 16 from decreasing, the rigidity of the vehicle body frame 16 can be further improved. Further, since the rear frame portion 20 and the left and right frame portions 18 and 19 can be maintained in a regular positional relationship without causing distortion, the assembly accuracy can be further improved.

The rib surfaces 18b, 18c, 19b, 19c, and 20a of the left rear side and right rear side frame molding materials 38l and 38r also contribute significantly to the improvement of the rigidity of the vehicle body frame 16, and their actions will be described below.
Left and right side rib surfaces 18b and 19b are formed on the upper edges of the left and right frame portions 18 and 19, left and right front rib surfaces 18c and 19c are formed on the leading edge, and the upper edges of the rear frame portion 20 are formed. Rear rib surfaces 20a are formed and the ends of these rib surfaces 18b, 18c, 19b, 19c, 20a are welded together. The formation of the rib surfaces 18b, 18c, 19b, 19c, 20a not only improves the rigidity of the individual members of the left and right frame portions 18, 19 and the rear frame portion 20, but also improves the rigidity of the rib surfaces 18b, 18c, 19b. , 19c, 20a are welded to each other, so that the rigidity of the entire body frame 16 is significantly increased.

To elaborate on this point, as can be seen from FIG. 3 and the like, the left and right frame portions 18 and 19 and the rear frame portion 20 extend upward from the bottom wall 17a of the main frame portion 17 and the tank accommodating portion 22. The left and right frame portions 18 and 19 extend forward from the front wall 17b of the main frame portion 17 to form an expansion space 23. The rib surfaces 18b, 18c, 19b, 19c, and 20a are arranged so as to surround the tank accommodating portion 22 and the expansion space 23, and their ends are welded to each other. As a result, the rib surfaces 18b, 18c, 19b, 19c, 20a pass from the front edge of the left frame portion 18 to the upper edge of the left frame portion 18, the upper edge of the rear frame portion 20, and the upper edge of the right frame portion 19. It functions as one long rib surface continuous to the leading edge of the right frame portion 19, and prevents deformation of the left and right frame portions 18, 19 and the rear frame portion 20 in the tilting direction.

That is, when an external force acts on the vehicle body frame 16 due to various factors while the vibrating roller 1 is in operation, for example, the left frame portion 18 is tilted so that the upper edge is displaced to the left or right with the bottom wall 17a of the main frame portion 17 as a base point. Directional deformation occurs. If the left rib surface 18b and the left front rib surface 18c are not provided, the left frame portion 18 is easily deformed in the tilting direction. Even if the left rib surface 18b and the left front rib surface 18c are provided, if the ends are not welded to each other, the ends will be displaced in the approaching or separating directions when an external force is applied. Therefore, the reinforcing effect due to the rib shape cannot be obtained, and the left frame portion 18 is deformed in the tilting direction.

Since the ends of the left rib surface 18b and the left front rib surface 18c are welded to each other, the positional displacement between the ends can be regulated and the reinforcing effect due to the rib shape can be surely obtained. It is possible to prevent the frame portion 18 from being deformed in the tilting direction. Deformation of the right frame portion 19 and the rear frame portion 20 in the tilting direction is also suppressed by the rib surfaces 19b, 19c, 20a on the same principle, and as a result, further improvement in the rigidity of the vehicle body frame 16 is achieved. Can be done.

In addition, the prevention of deformation of the left and right frame portions 18 and 19 in the tilting direction greatly contributes to achieving another effect of increasing the volume of the water storage tank 13.
For example, in a frame structure as described in Patent Document 1, a vertical wall is formed at a leading edge position on a bottom wall 17a as shown by a virtual line in FIG. 3 in order to prevent deformation of the left and right frame portions in the tilting direction. The 101 may be erected to connect the left frame portion 18 and the right frame portion 19. However, due to the presence of the vertical wall 101, the area of the lower tank 25 of the water storage tank in a plan view is limited to the inside of the tank accommodating portion 22 (on the bottom wall 17a), and the dead space conventionally existing on the front side of the vertical wall 101. There was a problem that (= expansion space 23) could not be used to expand the volume of the water storage tank 13.

In the present embodiment, the left and right frame portions 18 are mainly due to welding between the ends of the left and left front rib surfaces 18b and 18c, and between the ends of the right and right front rib surfaces 19b and 19c. , 19 is prevented from being deformed in the tilting direction. Therefore, the conventional vertical wall 101 can be abolished, and the tank accommodating portion 22 can be opened forward to communicate with the expansion space 23. Then, the front portion of the lower tank 25 is extended forward and downward from above the bottom wall 17a to form an expansion region 25b, and this expansion region 25b is arranged in the expansion space 23. As a result, the expansion space 23, which is a dead space, can be effectively used, and the volume of the water storage tank 13 can be expanded by the amount corresponding to the expansion area 25b.

On the other hand, the right end edge of the left rear frame portion 20l, the left end edge of the right rear frame portion 20r, the right end edge of the left rear rib surface 20al, and the left end edge of the right rear rib surface 20ar are after the main frame portion 17, respectively. They are welded so that they are butted against each other at the center position in the left-right direction on the side. Therefore, the left rear side and right rear side frame forming materials 38l and 38r have the same symmetrical shape, and each of them can be manufactured by punching the steel plate into the same shape by pressing and then bending it in the opposite direction. .. As a result, the same press die can be used in the punching work, and the work contents are the same, which contributes to the reduction of manufacturing cost.

In addition, in the present embodiment, the left rib surface 18b and the right rib surface 19b provided for improving the rigidity of the vehicle body frame 16 are also used for fixing the seat unit 32. In the conventional frame structure, it is necessary to provide a pair of dedicated left and right fixing brackets on the vehicle body frame in order to fix the seat unit, but since these members can be omitted, this point also contributes to cost reduction.

Although the description of the embodiment is completed above, the aspect of the present invention is not limited to this embodiment. For example, in the above embodiment, the frame structure of the rear vehicle body 5 of the combined vibrating roller 1 provided with the articulating mechanism 6 is embodied, but it can be arbitrarily changed if it is a compaction machine equipped with a water storage tank on the vehicle body frame. be. Therefore, for example, it may be applied to a frame structure such as a tire roller that does not have the articulating mechanism 6.

1 Combined vibration roller (compacting vehicle)
2 Front compaction wheel 3 Rear compaction wheel 4 Front vehicle body 5 Rear vehicle body 6 Articulate mechanism 10 Driver's seat 13 Water storage tank 16 Body frame 17 Main frame part 17a Bottom wall 17b Front wall 18 Left frame part 18b Left side rib surface 18c Left front rib surface 19 Right frame part 19b Right side rib surface 19c Right front rib surface 20 Rear frame part 20l Left rear frame part 20r Right rear frame part 20a Rear rib surface 20al Left rear rib surface 20ar Right rear rib surface 22 Tank housing 23 Expansion space 25 Lower tank 25b Expansion area 26 Upper tank 32 Seat unit 33 Base plate 38l Left rear frame molding material 38r Right rear frame molding material

Claims (4)

The left and right frame portions forming the left side surface and the right side surface of the vehicle body frame are welded to the left and right sides of the main frame portion provided with the rear compaction wheel, respectively, and the rear surface of the vehicle body frame is placed on the rear side of the main frame. The rear frame portion to be formed is welded to form the vehicle body frame, and the left and right frame portions and the rear frame portion are extended upward from the bottom wall facing above the main frame portion, respectively. In a compaction vehicle in which a tank accommodating portion surrounded from the left and right sides and the rear is formed on the bottom wall and a water storage tank is arranged.
The left frame portion and the left rear frame portion corresponding to the left region of the rear frame portion are formed from one steel plate and bent at the boundary line between them to form one member. Left rear frame molding material and
The left rib surface formed by bending the upper edge of the left frame to the right,
The left rear rib surface is formed by bending the upper edge of the left rear frame portion forward, and the left end is welded to the rear end of the left rear rib surface.
The right frame portion and the right rear frame portion corresponding to the right region of the rear frame portion are formed from one steel plate and bent at the boundary line between them to form one member. Right rear frame molding material and
The right rib surface formed by bending the upper edge of the right frame to the left,
The upper edge of the right rear frame portion is formed by being bent forward, and the right end is provided with a right rear rib surface welded to the rear end of the right rear rib surface.
The left rear frame molding material and the right rear frame molding material are arranged at regular positions with respect to the main frame and welded to the main frame portion, respectively, and the right end edge and the left of the left rear frame portion. A compaction vehicle characterized in that the right end edge of the rear rib surface, the left end edge of the right rear frame portion, and the left end edge of the right rear rib surface are welded to each other on the rear side of the main frame. The vehicle body frame is a frame of a rear vehicle body that is connected to a front vehicle body provided with a front compaction wheel via an articulating mechanism.
In the main frame portion, the front end of the bottom wall is bent downward to form a front wall on which the articulating mechanism is provided.
The left frame portion extends forward from the front wall of the main frame portion, and the front edge is bent to the right to form a left front rib surface.
The right frame portion extends forward from the front wall of the main frame portion, and the front edge is bent to the left to form a right front rib surface.
The left front rib surface and the right front rib surface are separated forward from the front wall of the main frame portion to form an expansion space on the front side of the front wall, and their upper ends are the front ends of the left side rib surface. And welded to the front end of the right rib surface,
The claim is characterized in that the front portion of the water storage tank extends forward and downward from above the bottom wall of the main frame to form an expansion region, and the expansion region is arranged in the expansion space. The compaction vehicle according to 1. The right end edge of the left rear frame portion, the right end edge of the left rear rib surface, the left end edge of the right rear frame portion, and the left end edge of the right rear rib surface are in the left-right direction on the rear side of the main frame. The compaction vehicle according to claim 1, wherein the compaction vehicle is abutted against each other and welded at a central position. The water storage tank is composed of a lower tank arranged in the tank housing portion and an upper tank formed continuously from the upper rear portion of the lower tank and projecting upward from the tank housing portion.
A seat unit in which the driver's seat is fixed on the base plate is arranged at the upper position of the lower tank of the water storage tank and at the front position of the upper tank.
The base plate is bridged between the left side frame portion and the right side frame portion of the vehicle body frame, and both the left and right sides are fixed on the left side rib surface and the right side rib surface.
The compaction vehicle according to claim 1.

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