JP6947770B2 - Rolling vehicle - Google Patents

Description

The present invention relates to a compaction vehicle, and more particularly to a boarding-type compaction vehicle on which an operator is boarded and driven.

In a boarding-type compaction vehicle such as a vibrating roller or a tire roller of this type, an operator sits in a driver's seat provided on the vehicle body to perform a driving operation, and the front of the vehicle also serves as a traveling wheel provided in the front and rear of the vehicle body. Work to compact pavement materials such as gravel and asphalt laid on the roadbed or roadbed while traveling by the part and rear compaction wheels. During pavement work, the water stored in the water storage tank is used to prevent the pavement material from adhering to the compaction wheel or to cool the pavement material after compaction. Water is sprinkled on the road surface.

Conventionally, the driver's seat of a compaction vehicle has been an integrated type in which a seat cushion on which an operator sits and a seat back that supports the back are integrated. As a suitable shape for arranging such a driver's seat on the vehicle body, the water storage tank consists of a lower tank and an upper tank that is continuous upward from the rear of the upper surface of the lower tank, and is located at the upper position of the lower tank and of the upper tank. The driver's seat is arranged at the front position. For example, the driver's seat is fixed on the vehicle body by being supported on the left and right by a pair of left and right fixing brackets provided on the vehicle body.

However, since the integrated driver's seat has a structure in which the seat back is supported from the seat cushion fixed on the vehicle body, the number of parts increases and the manufacturing cost increases, and for example, either the seat cushion or the seat back When it is damaged, there is no choice but to replace the whole, so there is a drawback that the operation cost is high.

Therefore, a compaction vehicle provided with a split-type driver's seat in which the seat cushion and the seat back are individually fixed has been proposed (see, for example, Patent Document 1). In the compaction vehicle of Patent Document 1, the seat cushion is fixed to the vehicle body as in the integrated type, and the seat back is fixed to the seat back mounting surface facing the front of the upper tank of the water storage tank. A pair of left and right locking holes that open diagonally upward when the water storage tank is resin-formed are formed on the seat back mounting surface, and a pair of left and right locking brackets mounted on the upper rear surface of the seat back are locked. It is inserted and stopped in the hole. The lower part of the seat back is bolted to the seat back mounting surface of the upper tank via a fastening bracket, whereby the seat back is fixed at a predetermined position with respect to the seat back mounting surface.

Japanese Unexamined Patent Publication No. 11-140814

However, in the compaction vehicle of Patent Document 1, the locking bracket and the fastening bracket fixing the seat back may be damaged when the water storage tank is full.
That is, when the water storage tank is filled with water, a phenomenon occurs in which a large-area, flat seat back mounting surface expands and deforms forward and presses the back surface of the seat back. This pressing force exerts a large load on the locking bracket and the fastening bracket that fix the seat back, and there is a problem that these members are damaged and the normal seat back fixing function is impaired.

Although it is possible to take measures to suppress expansion and deformation by forming ribs on the seat back mounting surface, a new problem arises in which resin molding becomes complicated and the manufacturing cost rises, which is a drastic solution to the problem. I didn't get it.

The present invention has been made to solve such a problem, and an object of the present invention is to damage the seat back fixing member due to expansion and deformation of the seat back mounting surface when the water storage tank is filled with water. It is an object of the present invention to provide a compaction vehicle capable of preventing such a situation from occurring and thereby improving the durability of the driver's seat.

In order to achieve the above object, in the compaction vehicle of the present invention, a seat back mounting surface facing forward is formed on a water storage tank made of synthetic resin mounted on the vehicle body, and a seat back fixing member is formed on the seat back mounting surface. In a compaction vehicle in which the seat back of the driver's seat is fixed via the above, the back surface of the seat back is separated forward from the seat back mounting surface, and the seat back mounting surface when the water storage tank is filled with water. A gap larger than the maximum amount of positional displacement to the front due to the expansion and deformation of the seat back is formed between the seat back mounting surface and the back surface of the seat back.

According to the compaction vehicle of the present invention, it is possible to prevent the seat back fixing member from being damaged due to expansion and deformation of the seat back mounting surface when the water storage tank is filled with water, thereby making the driver's seat durable. Can be improved.

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 a side sectional view showing a rear vehicle body. FIG. 3 is a detailed view of part A of FIG. 3 showing a state in which the seat back is attached to the seat back attachment surface of the water storage tank. It is the B arrow view of FIG. 4 which also shows the attached state of the seat back. It is an exploded perspective view which shows the hooking state of the hook bar to the hook bracket, and the fastening state of the fastening bracket. It is a figure corresponding to FIG. 4 which shows the mounting structure of the seat back of another example.

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 a vehicle) 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 water is sprinkled on 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 a side sectional view showing the rear vehicle body 5, and FIG. 4 is a portion A of FIG. A detailed view and FIG. 5 is a view taken along the line B of FIG. 4, which also shows an attached state of the seat back 10b.
As shown in each figure, a bottom wall 5a facing upward is formed at the rear portion of the rear vehicle body 5, and on the bottom wall 5a, the left side wall 5b, the right side wall 5c, and the rear wall 5d form the bottom wall 5a from the left and right sides and from the rear. A tank accommodating portion 16 is formed that is surrounded and opened upward and forward. The lower tank 17 of the water storage tank 13 is arranged in the tank accommodating portion 16 and fixed by a bracket (not shown), and the upper tank 18 is continuous upward from the rear portion of the upper surface of the lower tank 17.

The lower tank 17 and the upper tank 18 cooperate to form an internal space of the water storage tank 13, and a supply port 19 for water supply is provided on the upper surface of the upper tank 18. The water storage tank 13 of the present embodiment is manufactured by rotary molding using a synthetic resin material, but the manufacturing method is not limited to this and can be arbitrarily changed.

A seat unit 20 including the driver's seat 10 is arranged at an upper position of the lower tank 17 of the water storage tank and at a position on the front side of the upper tank 18. In the seat unit 20, the driver's seat 10 is mounted on the base plate 21 in a horizontal posture via the seat rail 22, and the armrests 23 are fixed to the left and right sides of the driver's seat 10, respectively. The base plate 21 is bridged between the left side wall 5b and the right side wall 5c of the rear vehicle body 5, and both the left and right sides thereof are fixed and supported on the upper edges of the side walls 5b and 5c via the anti-vibration rubber 24. ..

Since the driver's seat 10 of the present embodiment is a split type in which the seat cushion 10a on which the operator sits and the seat back 10b supporting the back are individually fixed, only the seat cushion 10a is mounted on the base plate 21. Is. The seat back 10b is fixed to the seat back mounting surface 26 facing the front of the upper tank 18 of the water storage tank 13, and the details of the mounting structure will be described below.

As shown in FIG. 2, a seat back mounting surface 26 facing forward is recessed in a stepped shape on the front surface 18a of the upper tank 18, and the seat back mounting surface 26 has a square shape corresponding to the seat back 10b. There is. The seat back mounting surface 26 is opened upward, and the left and right sides and the lower side are surrounded by rib surfaces 26a, 26b, and 26c formed by steps. The lower rib surface is composed of a first rib surface 26b and a second rib surface 26c in two upper and lower stages, and a seat lower fixing surface 27 is formed between the rib surfaces 26b and 26c. The seat lower portion fixing surface 27 is formed over the entire left-right direction of the seat back mounting surface 26 so that the lower portion of the seat back 10b is fixed.

A pair of seat upper fixing surfaces 28 are recessed in a stepped shape at positions separated from each other to the left and right of the upper part of the seat back mounting surface 26. The position and shape of each seat upper fixed surface 28 are set so as not to be affected by the expansion and deformation of the seat back mounting surface 26 when the water storage tank 13 is filled with water.

When the water storage tank 13 is full, the seat back mounting surface 26 expands and deforms as shown by virtual lines in FIGS. 4 and 5, and the amount of positional displacement to the front thereof differs depending on the portion on the seat back mounting surface 26. The maximum positional displacement amount Lmax occurs in the region 29 shown by the virtual line in FIG. 2, that is, the region 29 corresponding to the center in the left-right direction and the center slightly in the vertical direction on the seat back mounting surface 26 (hereinafter, the maximum displacement region). 29). As a position where the amount of forward displacement avoiding the maximum displacement region 29 is small, both sides in the left-right direction and the upper part in the vertical direction on the seat back mounting surface 26 are selected, and each seat upper fixed surface 28 is formed at this position. Has been done. Therefore, even if the seat back mounting surface 26 is displaced forward due to the expansion and deformation of the water storage tank 13, the seat upper fixed surface 28 is hardly distorted due to such positional measures.

Further, each seat upper fixing surface 28 has a square shape having a small area for fixing the hook bracket 33, which will be described later, and is recessed in a stepped shape so as to be opened upward and on both the left and right sides. The lower side is surrounded by a rib surface 28a formed by a step. As a result, each seat upper fixed surface 28 is isolated from the seat back mounting surface 26 via the rib surface 28a without being continuous with the seat back mounting surface 26. If each seat upper fixing surface 28 is continuous with respect to the seat back mounting surface 26 without passing through the rib surface 28a, each seat upper fixing surface 28 is distorted due to the influence of expansion and deformation of the seat back mounting surface 26. The larger the area of the seat upper fixed surface 28, the more remarkable the tendency becomes.

By being surrounded by the rib surface 28a, the seat upper fixing surface 28 is reinforced to improve the rigidity and is isolated from the seat back mounting surface 26. Therefore, the influence of the expansion and deformation of the seat back mounting surface 26 is blocked, and since the area is small, distortion is unlikely to occur. Therefore, even if such a shape measure is taken, the occurrence of distortion of each seat upper fixing surface 28 is prevented, and as a result, the seat upper fixing surface 28 is maintained in the desired flat surface even when the water storage tank 13 is full. ..

Based on the same knowledge, the above-mentioned seat lower fixing surface 27 is also provided with positional and shape measures. That is, the lower portion in the vertical direction on the seat back mounting surface 26 is selected as a position where the amount of forward positional displacement avoiding the maximum displacement region 29 is small, and the seat lower portion fixing surface 27 is formed. Further, the seat lower fixing surface 27 is reinforced by being sandwiched between the first and second rib surfaces 26b and 26c from above and below to improve the rigidity, and is isolated from the seat back mounting surface 26 via the first rib surface 26b. Has been done. Therefore, the occurrence of distortion of the lower fixed surface 27 of each sheet is prevented, and the desired flat surface is maintained even when the water storage tank 13 is full.
In the present embodiment, the above-mentioned seat lower fixing surface 27 and seat upper fixing surface 28 function as the fixing surface of the present invention.

A pair of left and right insert nuts 30 are embedded in each seat upper fixing surface 28, and a pair of left and right insert nuts 31 are provided on the seat lower fixing surface 27 so as to correspond to these seat upper fixing surfaces 28 in the left-right direction. It is buried, and the seat back 10b is attached using these insert nuts 30 and 31.

FIG. 6 is an exploded perspective view showing the hooked state of the hook bar on the hook bracket and the fastened state of the fastening bracket. In the figure, the periphery of the seat upper fixing surface 28 on the left side is shown, and although not shown, the right side is Has the same symmetrical structure.
First, the mounting structure of the upper part of the seat back 10b will be described. As shown in FIGS. 4 to 6, hook brackets 33 formed by bending steel plates are arranged on the left and right seat upper fixing surfaces 28, and each hook bracket 33 is composed of a base surface 33a and a hook surface 33b. Bolts 34 are inserted from the front into the pair of left and right bolt holes 33c of the base surface 33a forming a square flat plate and screwed into the insert nut 30, whereby the hook brackets 33 are fastened to the left and right seat upper fixing surfaces 28, respectively. ing. The hook surface 33b extends from the lower edge of the base surface 33a so as to be folded upward, and the hook surface 33b is an arc that is concave upward so that the hook bar 37 described later can be fitted from above. In addition to its shape, its tip is shaped like a flat plate to guide the hook bar 37 and points diagonally upward and forward.

On the other hand, on the upper left and right of the back surface of the seat back 10b, hook metal fittings 35 that are hooked on the hook brackets 33 on the seat back mounting surface 26 side (hereinafter, abbreviated as the tank side) of the water storage tank 13 are fixed. There is. The hook 35 is formed by welding a hook bar 37 formed by bending a metal round bar onto a square base surface 36 made of a steel plate. Bolts 38 are inserted into the pair of upper and lower bolt holes 36a of the left and right base surfaces 36 from the rear and screwed into the upper nut portion of the seat frame (not shown) provided in the seat back 10b, whereby the left and right hooks are hooked. The metal fitting 35 is fastened to the back surface of the seat back 10b.

Welded portions 37a of the hook bars 37 are welded to the rear surfaces of the base surfaces 36 of the left and right hook brackets 35, and the lower ends of the welded portions 37a are bent downward and diagonally rearward to form a linear arm portion 37b. Has been done. The lower ends of the left and right arm portions 37b are bent in the approaching direction (left-right center side of the seat back 10b) to form a linear hook portion 37c extending in the left-right direction. As shown by arrows in FIG. 6, the hooking portions 37c of the left and right hooking bars 37 are fitted into the hook surface 33b of the corresponding hook bracket 33 from above, and are fitted into the hook surface 33b by the weight of the seat back 10b. It is hooked so that the upper part of the seat back 10b is hooked on the seat back mounting surface 26 on the tank side.

Next, the mounting structure of the lower part of the seat back 10b will be described. As shown in FIGS. 4 and 6, fastening brackets 41 made of steel plates are arranged at the left and right insert nuts 31 of the seat lower fixing surface 27, and the fastening bracket 41 is bent with the bent portion 41c as a boundary. It is formed and has a crank shape. A bolt 42 is inserted from the front into the bolt hole 41a formed in the lower region of each fastening bracket 41 and screwed into the corresponding insert nut 31, whereby the left and right fastening brackets 41 are placed on the seat lower fixing surface 27. It has been concluded.

Bolts 43 are inserted from the rear into the pair of upper and lower bolt holes 41b penetrating the upper region of the fastening bracket 41 and screwed into the lower nut portion of the seat frame (not shown) in the seat back 10b, thereby fastening the left and right sides. The bracket 41 is fastened to the back surface of the seat back 10b. As a result, the lower part of the seat back 10b is fastened to the seat lower part fixing surface 27 on the tank side via the left and right fastening brackets 41.
In the present embodiment, the above hook bracket 33, hook bracket 35, and fastening bracket 41 function as the seat back fixing member of the present invention.

The seat back 10b mounted on the seat back mounting surface 26 in this way is prevented from rattling, and the mounting state thereof will be described below.
In a state where the upper portion of the seat back 10b is hooked on the seat back mounting surface 26 on the tank side and the lower portion of the seat back 10b is fixed to the seat lower fixing surface 27, the hook portion 37c of the hook bar 37 is a hook bracket 33. Within the hook surface 33b of the above, not only the upward detachment but also the forward / backward movement is restricted. As a result, the hooking portion 37c is hooked in the hook surface 33b without rattling, so that the entire seat back 10b is also mounted on the seat back mounting surface 26 of the water storage tank 13 without rattling. Therefore, the operator can be stably seated in the driver's seat 10, and by extension, the commercial value of the vehicle 1 can be improved.

On the other hand, the seat back 10b is attached / detached according to the following procedure.
To remove the seat back 10b as shown in FIG. 4, first, the bolts 42 of the left and right fastening brackets 41 are removed, and the lower part of the seat back 10b is pulled so as to be separated from the tank side. The entire seat back 10b rotates diagonally forward and upward as shown by an arrow a in FIG. 4 around the axis CL of the hook portion 37c fitted in the hook surface 33b. Then, when the entire seat back 10b is lifted when the seat back 10b is rotated to the posture of the virtual line, the hook portion 37c is separated upward from the inside of the hook surface 33b, and the removal work is completed.

Further, in order to attach the seat back 10b, first, the hook portions 37c of the left and right hook bars 37 are fitted into the hook surfaces 33b of the respective hook brackets 33, and then the lower part of the seat back 10b is from the posture of the virtual line. To the tank side. Also at this time, the entire seat back 10b rotates diagonally backward and downward as shown by an arrow b in FIG. 4 around the axis CL of the hooking portion 37c. Then, when the lower region of the fastening bracket 41 is fastened with the bolt 42, the mounting work is completed.

Since the rotation of the seat back 10b is guided by utilizing the engagement relationship between the hook bracket 33 and the hook bracket 35 in this way, the heavy seat back 10b is handled stably and without requiring a large force. It is possible to achieve another effect that the maintainability of the vehicle 1 can be improved.

By the way, as described in [Problems to be Solved by the Invention], in the compaction vehicle of Patent Document 1, the back surface of the seat back is pressed by the seat back mounting surface that expands and deforms forward when the water storage tank is full. There was a problem that the locking bracket and the fastening bracket fixing the seat back were damaged.
As a countermeasure, as shown in FIGS. 4 and 5, the back surface of the seat back 10b is arranged forward with respect to the seat back mounting surface 26 of the water storage tank 13, whereby the seat back mounting surface 26 and the seat are arranged. A gap L is formed between the back surface and the back surface of the back 10b, and the details thereof will be described below.

Such a gap L is formed by recessing the seat back mounting surface 26 in the front surface 18a of the upper tank 18 of the water storage tank 13. Then, from the left and right seat upper fixing surfaces 28 further recessed with respect to the seat back mounting surface 26, the upper back surface of the seat back 10b is placed at a regular front-rear position (in this case) via the hook bracket 33 and the hook bracket 35. Corresponds to the front surface 18a of the upper tank 18), the arm portion 37b of the hook 35 has a linear shape that points downward and diagonally backward, and as a result, the seat back mounting surface 26 to the seat back 10b The upper back surface is separated to form a gap L.

Similarly, in order to support the lower back surface of the seat back 10b from the seat lower fixing surface 27 via the fastening bracket 41 at a regular front-rear position, the fastening bracket 41 is bent and formed with the bent portion 41c as a boundary. A gap L is formed so that the lower back surface of the seat back 10b is separated from the seat back mounting surface 26.
In the present embodiment, the arm portion 37b of the hook 35 and the bent portion 41c of the fastening bracket 41 function as the separation support portion of the present invention.

The gap L formed as described above is set to a value slightly larger than the maximum position displacement amount Lmax of the seat back mounting surface 26 that occurs when the water storage tank 13 shown in FIGS. 4 and 5 is full. Therefore, as shown by virtual lines in FIGS. 4 and 5, even if the seat back mounting surface 26 approaches the back surface of the seat back 10b due to expansion and deformation, contact with each other is prevented. Since the phenomenon that the expanded and deformed seat back mounting surface presses the back surface of the seat back as in Patent Document 1 is avoided, damage to members such as the hook bracket 33, the hook bracket 35, and the fastening bracket 41 is prevented. can do. As a result, the durability of the driver's seat 10 can be improved, and by extension, the durability of the vehicle 1 itself can be improved.

Further, as described above, the seat upper fixing surface 28 is formed on both the left and right sides and the upper part of the seat back mounting surface 26 having a small amount of forward positional displacement, has a small area where distortion is unlikely to occur, and has a rib surface 28a. It is reinforced by and isolated from the seat back mounting surface 26. Similarly, the seat lower fixing surface 27 is formed on the lower part on the seat back mounting surface 26 having a small amount of forward positional displacement, and is reinforced by the first and second rib surfaces 26b and 26c to form the seat back mounting surface 26. Is isolated from. Therefore, even when the water storage tank 13 is full, the upper fixing surface 28 of each seat and the lower fixing surface 27 of each seat are maintained in the desired flat surface without causing distortion.

When these fixing surfaces 27 and 28 are deformed, peeling occurs between them and the embedded insert nuts 30 and 31, and the insert nuts 30 and 31 fall off and the upper part of the seat back 10b by the hook bracket 33 and the fastening bracket 41. And the lower support function may be impaired. By preventing the fixed surfaces 27 and 28 from being distorted, the insert nuts 30 and 31 can be prevented from peeling off, and this factor also greatly contributes to improving the durability of the driver's seat 10.

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 mounting structure of the seat back 10b of the rear vehicle body 5 of the combined vibration roller 1 provided with the articulating mechanism 6 is embodied. Can be changed arbitrarily. Therefore, for example, it may be applied to a tire roller or the like that does not have the articulating mechanism 6.

Further, in the above embodiment, the seat back mounting surface 26 is recessed in the front surface 18a of the upper tank 18 of the water storage tank 13, but if the gap L can be formed, the seat back mounting surface 26 does not necessarily have to be recessed. The front surface 18a may be the seat back mounting surface 26.

Further, in the above embodiment, the hook bracket 33 fixed to the upper part of the seat back mounting surface 26 of the water storage tank 13 is hooked with the hook bracket 35 fixed to the upper part of the back surface of the seat back 10b. Is not limited to this. For example, as shown in FIG. 7, similarly to the lower fastening bracket 41, the upper portion of the seat back mounting surface 26 and the upper back surface of the seat back 10b are provided by bolts 52 via the fastening bracket 51 formed in a crank shape with the bent portion 51a as a boundary. May be concluded with. In this alternative example, the fastening bracket 51 functions as the seat back fixing member of the present invention, and the bent portion 51a thereof functions as the separation support portion of the present invention.

1 Combined vibration roller (rolling vehicle)
5 Rear body (body)
10 Driver's seat 10b Seat back 13 Water storage tank 26 Seat back mounting surface 26b 1st rib surface (rib surface)
26c 2nd rib surface (rib surface)
27 Seat lower fixed surface (fixed surface)
28 Seat upper fixed surface (fixed surface)
28a Rib surface 33 Hook bracket (seat back fixing member)
35 Hook bracket (seat back fixing member)
37b Arm part (separation support part)
41,51 Fastening bracket (seat back fixing member)
41c, 51a Bent part (separation support part)

Claims (4)

A compaction vehicle in which a seat back mounting surface facing forward is formed on a synthetic resin water storage tank mounted on the vehicle body, and the seat back of the driver's seat is fixed to the seat back mounting surface via a seat back fixing member. In
The back surface of the seat back is spaced forward from the seat back mounting surface, and a gap larger than the maximum forward displacement due to expansion and deformation of the seat back mounting surface when the water storage tank is filled with water is formed. , A compaction vehicle characterized in that it is formed between the seat back mounting surface and the back surface of the seat back. The seat back fixing member is fixed to a fixing surface formed on the seat back mounting surface, and is fixed.
The compaction vehicle according to claim 1, wherein the fixed surface is formed at a position avoiding a region where a maximum position displacement amount is generated due to expansion and deformation on the seat back mounting surface. The seat back fixing member is fixed to a fixing surface formed on the seat back mounting surface, and is fixed.
The fixed surface is recessed on the seat back mounting surface in a stepped shape, is reinforced by a rib surface formed by the step, and is isolated from the seat back mounting surface via the rib surface. The compaction vehicle according to claim 1, wherein the rolling vehicle is provided. The rolling compaction according to claim 1, wherein the seat back fixing member has a separation support portion for separating the back surface of the seat back from the seat back mounting surface to form the gap. vehicle.

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