JP6995075B2 - 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 on 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 on 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 rolling wheels. During pavement work, the water stored in the water storage tank is used for the front and rear rolling wheels to prevent the paving material from adhering to the rolling wheels or to cool the paving material after rolling. 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 that supports the seat back 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, there has been proposed a compaction vehicle provided with a split-type driver's seat in which the seat cushion and the seat back are individually fixed (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 formed of resin 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, 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, there is a problem that the seat back fixed to the seat back mounting surface is rattled.

That is, since it is difficult to form the locking hole that is resin-molded together with the water storage tank into the desired accurate shape, the contact surface of the locking hole and the contact surface of the locking bracket do not exactly overlap, and both of them. Rattling occurs between. Then, due to the vibration of the compaction vehicle during operation, the contact surface of the locking hole and the contact surface of the locking bracket constantly rub against each other, and the locking hole made of synthetic resin, which is more fragile than the metal locking bracket. There was a problem that the wear progressed rapidly and the rattling further expanded.

The present invention has been made to solve such a problem, and an object thereof is a rolling compaction capable of fixing the seat back of the driver's seat to the seat back mounting surface of the water storage tank without rattling. To provide a vehicle.

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 the seat back mounting surface is fixed on the upper portion of the seat back mounting surface. In a compaction vehicle in which the upper portion of the seat back of the driver's seat is fixed via the member and the lower portion of the seat back is fixed to the lower portion of the seat back mounting surface via the lower fixing member, the upper fixing member And one of the lower fixing members is a hook bracket having a hook surface for hooking the seat back to the seat back mounting surface, and is fitted in the hook surface to move in the front-rear direction. It is composed of a locking bar that is restricted, and either one of the upper fixing member and the lower fixing member fastens the seat back to the seat back mounting surface, and the hooking from the inside of the hook surface. It is composed of a fastening bracket that prevents the bar from coming off, and the seat back mounting surface is surrounded by a rib surface to form a stepped first seat fixing surface that is reinforced and is also formed with the back surface of the seat back. The hook bracket is arranged so as to form a gap between the two, and the hook bracket is fixed to either the first seat fixing surface or the back surface of the seat back of the seat back mounting surface of the water storage tank, and the hook is hooked. The stop bar is characterized in that it is fixed to either one of the first seat fixing surface and the back surface of the seat back of the seat back mounting surface of the water storage tank.

According to the compaction vehicle of the present invention, the seat back of the driver's seat can be fixed to the seat back mounting surface of the water storage tank without rattling.

It is a side view which shows the combined vibration 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. It is a detailed view of part A of FIG. 3 which shows the mounting state of the seat back to the seat back mounting surface of a water storage tank. It is the B arrow view of FIG. 4 which also shows the attached state of a 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 a fastening bracket. It is a detailed view of part C of FIG. 4 which shows the radius of curvature of the hook surface of a hook bracket, and the hooking part of a hooking bar. It is a schematic diagram which shows the 1st alternative example which changed the position of a hook bracket and a hook metal fitting. It is a schematic diagram which shows the 2nd alternative example which changed the position of a hook bracket and a hook metal fitting. It is a schematic diagram which shows the 3rd alternative example which changed the position of a hook bracket and a hook metal fitting.

Hereinafter, an embodiment in which the present invention is embodied in a combined vibration roller will be described.
FIG. 1 is a side view showing the combined vibration 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 are driven by a steering cylinder (not shown) provided on the front vehicle body 4 to drive the front and rear vehicle bodies 4 and 5 centering on the articulating mechanism 6. The vehicle 1 is steered by bending in the horizontal direction.

The front rolling 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 hydraulic motors for traveling (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 wheel 8 is installed at the 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 his feet, 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 on 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 compaction wheel watering nozzles 14f and 14r arranged in the vicinity of the front and rear compaction wheels 2 and 3 and a road surface watering nozzle 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 is sprinkled on the front and rear rolling 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 in FIG. 3 showing a state in which the seat back 10b is attached to the seat back mounting surface of the water storage tank 13. A detailed view and FIG. 5 is a view taken along the line B of FIG. 4, which also shows a mounting 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. The seat unit 20 has a driver's seat 10 mounted on a base plate 21 in a horizontal posture via a seat rail 22, and armrests 23 are fixed to both left and right sides of the driver's seat 10. 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 that individually fixes the seat cushion 10a on which the operator sits and the seat back 10b that supports the back, 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 both the left and right sides and the lower side are surrounded by rib surfaces 26a, 26b, and 26c. 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. In the present embodiment, the seat lower fixing surface 27 functions as the first seat fixing surface, and the seat upper fixing surface 28 functions as the second seat fixing surface. 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 slightly below the center 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 the rib surface 28a. 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, the seat back mounting surface 26 is affected by the expansion and deformation of the seat back mounting surface 26 and is distorted by each seat upper fixing surface 28. The larger the area of the seat upper fixed surface 28, the more remarkable the tendency.

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

Based on the same findings, the above-mentioned seat lower fixing surface 27 is also provided with positional and geometrical 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 displacement avoiding the maximum displacement region 29 is small, and the seat lower portion fixed surface 27 is formed. Further, since the seat lower fixing surface 27 is reinforced and the rigidity is improved by being sandwiched between the first and second rib surfaces 26b and 26c from above and below, the occurrence of distortion of each seat lower fixing surface 27 is prevented. Even when the water storage tank 13 is full, it is kept on the desired flat surface.

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 the right side is not shown. 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. It has a shape, and its tip is shaped like a flat plate to guide the hook bar 37 and points upward and diagonally forward.

On the other hand, on the upper left and right of the back surface of the seat back 10b, hook metal fittings 35 to be hooked to each hook bracket 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 hooking metal fitting 35 is formed by welding a hooking bar 37 formed by bending a metal round bar onto a square base surface 36 made of a steel plate. Bolts 38 are inserted from the rear into the pair of upper and lower bolt holes 36a of the left and right base surfaces 36 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 hooking bars 37 are welded to the rear surfaces of the base surfaces 36 of the left and right hooking 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.

FIG. 7 is a detailed view of the portion C of FIG. 4 showing the radius of curvature of the hook surface 33b of the hook bracket 33 and the hook portion 37c of the hook bar 37.
More specifically, the hooking state of the hook bar 37 with respect to the hook bracket 33 will be described in more detail. The radius of curvature R2 of the arc-shaped hook surface 33b of the hook bracket 33 is a hook having a circular cross-sectional shape of the hook bar 37. It is set smaller than the radius of curvature R1 of the stop portion 37c. Therefore, the hooking portion 37c is in contact with the hook surface 33b at two points in the front and rear of the outer peripheral surface thereof without being fitted to the innermost portion in the curved hook surface 33b. As a result, the movement of the hook bar 37, and thus the upper part of the seat back 10b, in the front-rear direction and downward is restricted.

Further, as shown by hatching in FIG. 7, the arm portion 37b of the hook bar 37 forms an overlapping region 39 overlapping in the left-right direction with respect to the hook surface 33b of the hook bracket 33. Therefore, the movement of the seat back 10b in the hooked state in the left-right direction is permitted only within the allowable range W shown in FIG. 5, and further movement is restricted by the interference of the arm portion 37b with the hook surface 33b. To.

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 formed by bending steel plates into a crank shape are arranged at the left and right insert nuts 31 of the seat lower fixing surface 27, respectively. A bolt 42 is inserted from the front into the bolt hole 41a penetrating 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. A bolt 43 is inserted from the rear into a pair of upper and lower bolt holes 41b penetrating the upper region of the fastening bracket 41, and is screwed into a lower nut portion of a seat frame (not shown) in the seat back 10b, whereby left and right fastening is performed. 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 fixed 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 hook bracket 33 and the hook bar 37 function as the upper fixing member of the present invention, and the fastening bracket 41 functions as the lower fixing member of the present invention.

The mounting state of the seat back 10b is compared with that of the compaction vehicle of Patent Document 1.
In Patent Document 1, even though the locking bracket on the seat back side is hooked on the locking hole on the water storage tank side, the contact surface of the locking hole and the contact surface of the locking bracket are overlapped with each other. It is an engagement relationship, and there is no strong movement regulation. The engagement relationship between the locking hole and the locking bracket and the shape error of the locking hole that occurs during resin molding are the causes of rattling, and the locking hole made of synthetic resin is caused by the rubbing caused by the original rattling. A vicious cycle occurs in which the wear of the plastic progresses rapidly and the rattling further increases.

Also in this embodiment, a position error occurs in the insert nuts 30 and 31 embedded during resin molding of the water storage tank 13, which may cause a position error of the seat back 10b via the hook bracket 33 and the hook bracket 35. However, even if the seat back 10b is fixed with a slight deviation from the normal position, there is no problem in seating the operator.
Then, when the lower part of the seat back 10b is fixed to the seat lower part fixing surface 27 by the left and right fastening brackets 41, the movement in the left-right direction within the allowable range W allowed by the hooking of the upper part of the seat back 10b is restricted. At the same time, the upward movement of the seat back 10b is also restricted. Due to this upward movement restriction, the hooking portion 37c of the hooking bar 37 is prevented from being detached upward from the inside of the hook surface 33b of the hook bracket 33, and is held in the hooked state fitted in the hook surface 33b. Will be done. At this time, since two front and rear points on the outer peripheral surface of the hooking portion 37c are in contact with the hook surface 33b, not only the hooking portion 37c is detached upward but also the movement in the front-rear direction is surely restricted.

As a result, in comparison with the engagement relationship between the locking hole and the locking bracket of Patent Document 1, the engagement relationship between the hooking portion 37c of the hooking bar 37 and the hook surface 33b of the hook bracket 33 of the present embodiment It will be much stronger in terms of movement restrictions. 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. Further, since the hook bar 37 and the hook bracket 33 are both made of metal, rattling may occur for some reason, and the hook portion 37c and the hook surface 33b rub against each other due to the vibration generated during the operation of the vehicle 1. Even so, wear does not progress and rattling does not increase. Therefore, according to the present embodiment, the seat back 10b of the driver's seat 10 can be fixed to the seat back mounting surface 26 of the water storage tank 13 without rattling, so that the operator can stably sit in the driver's seat 10 and eventually the vehicle 1. It is possible to improve the commercial value of.

On the other hand, during the production of the vehicle 1, the seat back 10b is attached to the seat back mounting surface 26 of the water storage tank 13, and when the seat back 10b is damaged during the operation of the vehicle 1, a replacement work is carried out. Is performed by the following procedure.
To remove the seat back 10b as shown in FIG. 4, first, a tool such as a socket wrench is inserted into the gap between the upper surface of the seat cushion 10a and the lower edge of the seat back 10b, and the left and right bolts 42 are removed. Since the lower part of the seat back 10b is released from being fixed, when the lower part of the seat back 10b is pulled away from the tank side in that state, the entire seat back 10b is diagonally upwardly forward as shown by an arrow a in FIG. Rotates to. Since the hooking portion 37c of the hooking bar 37 has a circular cross section, the rotation at this time is guided by the hook surface 33b around the axis CL of the hooking portion 37c, and the seat back 10b can be smoothly rotated. can. 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 detached upward from the inside of the hook surface 33b of the hook bracket 33, and the upper portion of the seat back 10b is released from being fixed. The removal work is completed.

To attach the seat back 10b, first, the seat back 10b is held in the posture of a virtual line, and 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. When the lower portion of the seat back 10b is pushed toward the tank in this state, the entire seat back 10b rotates diagonally backward and downward as shown by an arrow b in FIG. Since the rotation at this time is also guided by the hook surface 33b around the axis CL of the hooking portion 37c, the seat back 10b can be smoothly rotated. Then, when the lower region of the fastening bracket 41 comes into contact with the seat lower fixing surface 27, the fastening is fastened with the bolt 42 using a tool, whereby the mounting work is completed.

The original role of the hook bracket 33 and the hook bracket 35 is to hook the upper part of the seat back 10b, but when the seat back 10b is attached or detached, the engagement relationship between these members 33 and 35 is used. The rotation of the seat back 10b is guided. As a result, the heavy seat back 10b can be handled stably and without requiring a large force, so that another effect of improving the maintainability of the vehicle 1 can be achieved.

On the other hand, in the mounting work of the seat back 10b, after hooking the upper part of the seat back 10b, the bolt hole 41a of the fastening bracket 41 is aligned with the insert nut 31 on the tank side and fastened with the bolt 42. The alignment of the seat back 10b is obstructed by the seat back 10b itself and cannot be visually recognized, so the alignment is performed by groping. In the present embodiment, the vertical position of the seat back 10b is determined by hooking the hooking portion 37c into the hook surface 33b, but in the left-right direction, the seat back 10b can be moved within the allowable range W shown in FIG. Has been done.

The movement of the seat back 10b in the left-right direction is guided by the hooking portion 37c sliding along the axis CL in the hook surface 33b, so that the bolt holes 41a can be easily aligned in the left-right direction. Can be carried out. Therefore, it is possible to concentrate only on the vertical alignment, and as a result, the bolt hole 41a can be easily aligned with the insert nut 31 even by groping, which makes it easier to mount the seat back 10b. ..

On the other hand, as can be seen from FIGS. A gap L is formed between the two. This gap L is intended to prevent damage to the hook bracket 33, the hook bracket 35, and the fastening bracket 41 due to expansion and deformation when the water storage tank 13 is filled with water, 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 in 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). A gap L between the upper back surface and the upper back surface is secured.

It should be noted that such a shape of the arm portion 37b has another advantage that the hook bar 37 can be easily bent and formed. 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 in a crank shape, and as a result, the seat back is formed. A gap L is secured between the mounting surface 26 and the lower back surface of the seat back 10b.

The gap L formed as described above is set to a value slightly larger than the maximum positional 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 in advance. Assuming that the gap L is not formed, the seat back mounting surface 26 presses the back surface of the seat back 10b due to expansion and deformation, and the hook bracket 33, the hook bracket 35, or the hook bracket 35 connecting the upper and lower portions thereof to the tank side. Members such as the fastening bracket 41 may be damaged. According to the present embodiment, such a situation can be prevented in advance, and as a result, the durability of the driver's seat 10 and the durability of the vehicle 1 can be improved.

Further, as described above, the seat upper fixed 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 displacement, and has a small area where distortion is unlikely to occur and is provided by the rib surface 28a. It is reinforced. Similarly, the seat lower fixing surface 27 is formed in 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. Therefore, even when the water storage tank 13 is full, the upper fixed surface 28 of each sheet and the fixed lower surface 27 of each sheet are maintained on 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 embodiment 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, but it may be a boarding-type compaction vehicle having a water storage tank mounted on the vehicle body. 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 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, while the seat back mounting surface 26. The lower part and the lower part of the back surface of the seat back 10b are fastened with bolts 42 and 43 via the fastening bracket 41, but the present invention is not limited to this. For example, as shown in the schematic view showing the first alternative example of FIG. 8, the hook bracket 35 is fixed to the upper part of the seat back mounting surface 26 of the water storage tank 13, and the hook bracket 33 (hook) is fixed to the upper part of the back surface of the seat back 10b. (Upside down arrangement) may be fixed. Similar to the embodiment, in this case as well, the hook bracket 33 and the hook bar 37 function as the upper fixing member of the present invention, and the fastening bracket 41 functions as the lower fixing member of the present invention.

Alternatively, as shown in the schematic view showing the second alternative example of FIG. 9, the upper part of the seat back mounting surface 26 of the water storage tank 13 and the upper part of the back surface of the seat back 10b are fastened with bolts via the fastening bracket 41, and then fastened. The hook bracket 33 may be fixed to the lower part of the seat back mounting surface 26 of the water storage tank 13, and the hook bracket 35 may be fixed to the lower part of the back surface of the seat back 10b. Further, as shown in the schematic view showing the third alternative example of FIG. 10, the hook bracket 35 is fixed to the lower part of the seat back mounting surface 26 of the water storage tank 13, and the hook bracket 33 is fixed to the lower part of the back surface of the seat back 10b. You may. In these cases, the fastening bracket 41 functions as the upper fixing member of the present invention, and the hook bracket 33 and the hook bar 37 function as the lower fixing member of the present invention.

Further, in the above embodiment, the four locations on the left and right sides of the upper part of the seatback 10b and the left and right sides of the lower part are fixed to the seatback mounting surface 26 of the water storage tank 13, but the present invention is not limited to this. For example, the fastening bracket 41 may be arranged at two locations on the left and right as in the embodiment, and the hook bracket 33 and the hook bracket 35 may be provided at only one location at the center of the left and right of the seat back 10b. On the contrary, the hook bracket 33 and the hook bracket 35 may be arranged at two places on the left and right as in the embodiment, and the fastening bracket 41 may be provided at only one place at the center of the left and right of the seat back 10b.

Further, in the above embodiment, by directly hooking the metal hook bar 37 to the metal hook bracket 33, the progress of wear in the event of rattling is prevented, but the present invention is limited to this. is not it. For example, as shown by a virtual line in FIG. 6, a tube 51 (elastic member) having elasticity made of rubber or urethane may be externally fitted to the hook bar 37 to cover the surface. A new effect is obtained that no abnormal noise is generated even if rattling occurs. Even if the tube is worn out due to rubbing due to rattling, the internal metal hook bar 37 comes into contact with the hook bracket 33 side, so that further wear progress and eventually expansion of rattling is suppressed. be able to.

Further, in the above embodiment, the left and right hook brackets 33 have a symmetrical shape, but the shape is not limited to this, and for example, both hook brackets 33 may have the same shape. In this case, it is possible to obtain the effect that the manufacturing cost can be reduced by sharing the members.

Further, in the above embodiment, the insert nuts 30 and 31 are embedded in the seat back mounting surface 26 of the water storage tank 13 and the hook bracket 33 and the fastening bracket 41 are fastened, but the present invention is not limited to this. For example, by eliminating the insert nuts 30 and 31 and inserting one side of the hook bracket 33 and the fastening bracket 41 during resin molding of the water storage tank 13, these members 33 and 41 are fixed on the seat back mounting surface 26. You may.

1 Combined vibration roller (compacting vehicle)
5 Rear body (body)
10 Driver's seat 10b Seat back 13 Water storage tank 26 Seat back mounting surface
27 Seat lower fixing surface (second seat fixing surface)
28 Seat upper fixing surface (first seat fixing surface)
33 Hook bracket (upper fixing member, lower fixing member)
33b Hook surface 37 Hook bar (upper fixing member, lower fixing member)
41 Fastening bracket (upper fixing member, lower fixing member)
52 Tube (elastic member)

Claims (8)

A seat back mounting surface facing forward is formed on a synthetic resin water storage tank mounted on the vehicle body, and the upper part of the driver's seat back is fixed to the upper part of the seat back mounting surface via an upper fixing member. In a compaction vehicle in which the lower portion of the seat back is fixed to the lower portion of the seat back mounting surface via a lower fixing member.
One of the upper fixing member and the lower fixing member is fitted into a hook bracket having a hook surface for hooking the seat back to the seat back mounting surface, and is fitted in the hook surface in the front-rear direction. Consists of hook bars that are restricted from moving to
Either the upper fixing member or the lower fixing member is configured by a fastening bracket that fastens the seat back to the seat back mounting surface to prevent the hook bar from coming off from the inside of the hook surface. Be done,
The seat back mounting surface is arranged so as to form a stepped first seat fixing surface surrounded by a rib surface and reinforced, and to form a gap between the seat back mounting surface and the back surface of the seat back.
The hook bracket is fixed to either the first seat fixing surface or the back surface of the seat back of the seat back mounting surface of the water storage tank.
The compaction vehicle is characterized in that the hook bar is fixed to either one of the first seat fixing surface and the back surface of the seat back of the seat back mounting surface of the water storage tank. A second seat fixing surface reinforced by a rib surface is formed on the seat back mounting surface.
The fastening bracket fastens the seat back to the second seat fixing surface of the seat back mounting surface.
The compaction vehicle according to claim 1. The upper fixing member is composed of the hook bracket and the hook bar.
The lower fixing member is composed of the fastening bracket.
The hook bracket is fixed to the first seat fixing surface of the seat back mounting surface of the water storage tank.
The compaction vehicle according to claim 1, wherein the hook bar is fixed to the back surface of the seat back. The upper fixing member is composed of the hook bracket and the hook bar.
The lower fixing member is composed of the fastening bracket.
The hook bracket is fixed to the back surface of the seat back and is fixed.
The compaction vehicle according to claim 1, wherein the hook bar is fixed to the first seat fixing surface of the seat back mounting surface of the water storage tank. The upper fixing member is composed of the fastening bracket.
The lower fixing member is composed of the hook bracket and the hook bar.
The hook bracket is fixed to the first seat fixing surface of the seat back mounting surface of the water storage tank.
The compaction vehicle according to claim 1, wherein the hook bar is fixed to the back surface of the seat back. The upper fixing member is composed of the fastening bracket.
The lower fixing member is composed of the hook bracket and the hook bar.
The hook bracket is fixed to the back surface of the seat back and is fixed.
The compaction vehicle according to claim 1, wherein the hook bar is fixed to the first seat fixing surface of the seat back mounting surface of the water storage tank. The hook surface of the hook bracket has an arc shape.
The hook bar has a circular cross section and has a circular cross section.
The compaction vehicle according to claim 1, wherein the radius of curvature of the hook surface is set to be smaller than the radius of curvature of the hook bar. The compaction vehicle according to claim 1, wherein the hook bar is covered with an elastic member.

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