JP2010030364A - Work vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a work vehicle facilitated in maintenance inspection by easily opening a drive unit at a lower side of a vehicle body frame while longitudinally juxtaposing a front driver's seat and a seat separate from the front driver's seat in an operating unit. <P>SOLUTION: This vehicle body frame 2 is constituted of a rear frame 2B disposed at a rear side at a position higher than a floor surface of the operating unit 5 and a front frame 2A disposed to support the floor surface of the operating unit 5. The drive unit 120 is arranged in a lower part of the rear frame 2B, and a rear part in a rear seat disposing space is disposed to be overlapped with an upper side of the rear frame 2B. A rear seat 14 disposed in the rear seat disposing space is constituted to be freely switched between a posture where the rear seat is located on the upper side of the rear frame 2B to cover the drive unit 120 and a posture allowing the visual confirmation of the drive unit 120 by opening the upper side of the rear frame 2B. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a work vehicle including a driving unit in which a front driver seat and a rear seat installation space are arranged side by side, and a driving unit is disposed below a vehicle body frame.

As described above, a work vehicle equipped with a driving section in which the front driver's seat and the rear seat installation space are juxtaposed in front and rear can be used for transporting personnel as well as for transporting materials etc. It can be done. In such a work vehicle, when the driving part is disposed on the lower side of the vehicle body frame, it is not necessary to provide a space for arranging the driving part on the vehicle body frame. This is advantageous in that the space on the body frame that tends to be used can be effectively used. Conventionally, the technique shown in the following [1] has been known as one employing such a structure.
[1] In the driving section, a separate seat can be installed on the rear side of the driving seat, a dumpable loading platform is mounted on the rear of the vehicle body frame, and a partition member that partitions the loading platform from the driving section; A seat different from the driver's seat in the driver is connected to the dump truck, and the upper part of the prime mover is opened along with the dump operation of the carrier (see, for example, Patent Document 1).

US Pat. No. 6,994,388 (see FIG. 2A, 2B. FIG. 3A, 3B)

In this type of work vehicle, in order to perform the maintenance work of the prime mover disposed on the lower side of the vehicle body frame, of course, some configuration for opening the upper part of the prime mover is necessary.
For this reason, in the thing of said patent document 1, the partition member which partitions off between an operation part is connected to the front-end position of the dumping carrier used as the attachment position of a partitioning member, and a driving | operation is accompanying a dumping operation of a loading platform. The upper part is configured to be opened.
If comprised in this way, a driving | running | working part will be arrange | positioned under a vehicle body frame, and the driving | running | working part with the wide front and rear width | variety by which the front driver's seat and the rear seat installation space were juxtaposed on the front and back on the vehicle body frame was provided. In this work vehicle, the upper side of the prime mover located on the lower side of the vehicle body frame can be released with the dumping operation of the loading platform, which is useful in that a required maintenance work can be performed.

However, with this conventional structure, every time maintenance work is required, the dump bed must be operated together with the partition member to open the upper part of the prime mover. If it is not possible to remove or move the rear seat, it is necessary to perform such operations as folding it, which is often accompanied by these preliminary operations.
In addition, it is also inconvenient in that the dump truck cannot be dumped during driving in the double row seat specification using both the front driver seat and the rear seat.

  An object of the present invention is to provide a work vehicle that facilitates maintenance and inspection by easily opening the driving part below the vehicle body frame while arranging the front driver's seat and another seat side by side in the driver's part. is there.

[Solution 1]
The technical means of the work vehicle according to the present invention taken to solve the above-described problem is the operation in which the front driver seat and the rear seat installation space are juxtaposed on the front and rear on the vehicle body frame as described in claim 1. And a rear frame disposed on the rear side at a position higher than the floor surface of the operation unit, and disposed to support the floor surface of the operation unit on the front side of the rear frame. The body frame is configured with the front frame,
A driving part is arranged below the rear frame, and a rear part of the rear seat installation space is arranged overlapping the upper side of the rear frame,
A posture in which the rear seat disposed in the space for installing the rear seat is positioned on the upper side of the rear frame so as to cover the driving portion, and a posture in which the upper side of the rear frame is opened and the driving portion is visible. It is configured to be switchable.

[Action and effect]
As described above, in the work vehicle of the present invention according to Solution 1, the rear frame, which is higher than the floor surface of the front frame in order to dispose the prime mover, overlaps the rear part of the rear seat installation space. Position and switch the rear seat of the rear seat installation space between a position that covers the driving part above the overlapping rear frame and a position that allows the driving part to be viewed by opening the upper side of the rear frame It is configured freely.
As a result, it is possible to easily open and close the upper portion of the prime mover located below the seat with a simple operation of simply switching the posture of the rear seat.

  Therefore, it is possible to easily open and close the upper part of the driving part without the need for preliminary separate work for opening the upper part of the driving part, and to improve the troublesomeness in the maintenance and inspection work of the driving part. There is.

[Solution 2]
According to the second solving means of the work vehicle of the present invention, as described in claim 2, the rear seat posture switching is not performed by moving the rear seat to the front side in the first posture that allows the driving portion to be visually recognized. It is in the use state, and is characterized in that it is configured such that the second posture covering the driving unit is a use state in which the rear seat is moved to the rear side.

[Action and effect]
As described above, the work vehicle of the present invention according to the solving means 2 has the following effects in addition to the same effects as the invention according to the solving means 1.
In other words, switching the rear seat to the first position can secure a large space for the inspection on the driving side, and switching the rear seat to the second position allows the driver's space to be used with a wider comfort area. can do.

[Solution 3]
The third solving means in the work vehicle of the present invention is characterized in that, as described in claim 3, the rear loading portion provided on the rear side of the driving portion is configured by a dumping bed.

[Action and effect]
As described above, the work vehicle of the present invention according to the solving means 3 has the following effects in addition to the same effects as the invention according to the solving means 1 or 2.
That is, not only the driving part under the rear seat but also the opening around the driving part is wide open, the rear loading part on the rear side of the driving part is constituted by a dumpable loading platform. In addition to the side space, the space on the rear side can also be opened widely.
Therefore, there is an advantage in that it is easy to perform maintenance work on a part related to the driving part and the peripheral part.
In addition, since the rear seat is disposed in the rear seat installation space and does not interfere with the operation area of the dump truck, the operation of the dump truck is not limited by the usage pattern of the rear seat, but at any time. Can be done.

[Solution 4]
According to a fourth aspect of the work vehicle of the present invention, as described in claim 4, a partition member that partitions between the rear loading portion and the driving portion is provided, and the partition member is provided at a rear portion of the front driver seat. It is characterized in that the position can be changed between the moved forward movement position and the backward movement position moved to the rear of the rear seat.

[Action and effect]
As described above, the work vehicle of the present invention according to the solving means 4 has the following effects in addition to the same effects as the invention according to the solving means 3.
That is, the partition member is moved to the rearward movement position so as to be positioned between the rear loading unit and the driving unit, and a space is formed in each of the driving unit for seating on the front driving seat and the rear seat. And it can be easily switched to the state where it is located at the forward movement position moved to the rear part of the front driver's seat and only the space for sitting on the driver's seat is formed in the driver's part.
Therefore, there exists an advantage which can perform the use condition accompanying the specification change of a driving | running | working part easily.

[Solution 5]
According to a fifth solving means of the work vehicle of the present invention, as described in claim 5, the driving portion is disposed below the left and right central portions of the rear seat in the second posture, and the rear seat in the second posture is arranged. It is characterized in that a radiator is disposed below one of the right side and the left side.

[Action and effect]
As described above, the work vehicle of the present invention according to the solving means 5 has the following effects in addition to the same effects as the invention according to the solving means 2 or 4.
That is, by changing the posture of the rear seat to the second posture, the upper portion of the radiator can be opened together with the driving portion, so that maintenance work can also be performed simultaneously on the periphery of the radiator with a relatively high inspection frequency.

[Solution 6]
According to a sixth solving means of the work vehicle of the present invention, as set forth in claim 6, the battery is placed below the side opposite to the side where the radiator is disposed on the right side or the left side of the rear seat in the second posture. It is characterized in that it is arranged.

[Action and effect]
As described above, the work vehicle of the present invention according to the solving means 6 has the following effects in addition to the same effects as the invention according to the solving means 5.
That is, by changing the posture of the rear seat to the second posture, the upper portion of the battery can be opened together with the driving portion, so that maintenance work can be performed simultaneously on the periphery of the battery that is relatively frequently inspected.

[Solution 7]
The seventh solving means in the work vehicle of the present invention includes a lops that covers the front driver seat and the rear seat, and the left and right rear struts of the lops are arranged on the rear lateral side of the rear seat. The armrests for passengers seated in the rear seats are provided on the left and right rear struts, the armrests are used to extend forward from the rear struts side, and stored along the rear struts. It is characterized in that the posture can be changed depending on the posture.

[Action and effect]
As described above, the work vehicle according to the present invention according to the solving means 7 has the following effects in addition to the same effects as the invention according to the solving means 1 to 6.
That is, since the armrest for the passenger seated on the rear seat using the rear column is equipped, the protection function for the passenger in the rear seat can be improved.
And since the armrest is configured to be able to change the posture between the use posture extended forward from the rear column and the retracted posture along the rear column, the armrest should be installed when getting on and off the rear seat In addition to being easy to get on and off in the retracted position, there is an advantage that when the rear seat is changed to the second position, the armrest is set in the retracted position to easily secure a wide working space.

[Overall configuration of work vehicle]
An example of an embodiment of a work vehicle according to the present invention will be described based on the drawings.
FIG. 1 is an overall side view of a work vehicle in a use form in which seats that can be seated in two rows are present, and FIG. 2 is a view of the work vehicle in a use form in which seats that can be seated only in one front row are present. It is a whole side view. FIG. 3 is an overall plan view of the work vehicle in the usage pattern in FIG. 1.
As shown in FIGS. 1 to 3, the vehicle body 1 includes a steerable left and right front wheel 3 supported on the front portion of the vehicle body frame 2, and an unsteerable left and right rear wheel supported on the rear portion of the vehicle body frame 2. The vehicle includes a wheel 4 and is configured as a four-wheel drive four-wheel drive vehicle.

A two-row seat specification (for four or five passengers) in which a passenger can be seated in the front driver seat 13 and the rear seat 14 shown in FIG. 1 at the front and rear intermediate portion of the vehicle body 1 and the front driver seat shown in FIG. 13 is provided with a driving unit 5 that can be used in a single-seat specification (for two-seaters) where passengers can be seated.
Behind the driving unit 5, a rear loading unit 6 including a loading platform 40 that can be changed between an extended state and a shortened state, which will be described later, and that can be dumped, is disposed between the driving unit 5 and the rear loading unit 6. A partition member 90 that partitions between the operation unit 5 and the rear stacking unit 6 (that constitutes a rear wall of the operation unit 5) is disposed.

  A driving unit 120 equipped with an engine 121 serving as a driving force source for the work vehicle is disposed at the lower rear portion of the vehicle body frame 2. The power output from the engine 121 is transmitted to the hydrostatic continuously variable transmission 123 through the transmission case 122, and the left and right rear wheels 4 are moved by the power continuously shifted by the hydrostatic continuously variable transmission 123. It is configured to be rotationally driven (see FIG. 26).

  A front wheel drive shaft 9 extends forward from the transmission case 122, and the left and right front wheels 3 are interlocked and connected to the front wheel drive shaft 9 via a front wheel differential device (not shown). . Thus, the power from the engine 121 is transmitted to the front wheel differential device via the hydrostatic continuously variable transmission 123 and the transmission case 122 so that the left and right front wheels 3 are rotationally driven.

[Body structure]
The vehicle body 1 includes a vehicle body core portion 200 configured by attaching a lops 30 that covers the driving portion 5 to the vehicle body frame 2 supported by the front wheels 3 and the rear wheels 4.
As shown in FIGS. 4 to 6, the vehicle body core portion 200 includes a first core member 201 composed mainly of the main frame 20 and a second core that is integrally assembled to the first core member 201. The core member 202 and the third core member 203 configured by the lops 30 are included. The body frame 2 is configured by a combination of the first core member 201 and the second core member 202.

As shown in FIG. 6, the first core member 201 is composed of left and right main frames 20 each having a long square pipe shape and brackets for attaching various devices.
The main frame 20 includes a pair of left and right main frame front portions 20a positioned along the vehicle front-rear direction on the front side of the vehicle body, a main frame rising portion 20b rising upward from a rear end side of the main frame front portion 20a, and A main frame rear portion 20c extending rearward from the upper end of the main frame rising portion 20b is bent in a substantially crank shape in a side view.
The main frame rising portion 20b is constituted by a rear seat support frame 25 that rises upward from the rear end portion of the main frame front portion 20a, and is extended from the upper portion of the rear seat support frame 25 to the rear side. 26 constitutes the main frame rear portion 20c.

  As shown in FIG. 6, the second core member 202 includes a front wheel support frame 21 that supports the steering handle 12 and the left and right front wheels 3, a front driver seat constituting frame 22 provided with a front driver seat 13, and a rear part. A rear seat constituting frame 23 provided with a seat 14 is provided, and a front deck plate 28 constituting the floor surface of the driving unit 5 on the front side of the front driver seat 13 and driving on the front side of the rear seat 14. The rear deck plate 29 constituting the floor surface of the part 5 is provided.

  The front wheel support frame 21 includes front strut receiving portions 21a of the lops 30 at the upper portions of both left and right ends, and the front wheels 3 are independently suspended via suspension spring receiving portions 3a provided on the front side at both end portions in the left and right directions. And a handle support portion 21c for the steering handle 12 for steering the left and right front wheels 3 on the upper side in the center in the left-right direction.

  The front driver seat constituting frame 22 includes a seat support portion 22a formed in a gate shape on the upper side of each of the left and right main frames 20 so as to support the front seating seat 13a of the front driver seat 13. A pipe frame 22b that also serves as a handrail for getting on and off and extends upward from both sides of the rear portion of the front wheel support frame 21 at positions closer to both ends in the left-right direction, and further to the rear side of the front wheel support frame 21 Thus, it is constituted by a square pipe-shaped support frame 22c extending upward from both sides on the back side of the front driver's seat 13.

  The rear seat constituting frame 23 supports the rear seat 14 together with the rear seat support frame 25 constituted by the main frame rising portion 20b and the front end portion of the cargo bed support frame 26. The front edge side support frame 23a that supports the front edge side of the seat 14a and the rear edge side support frame 23b that supports the rear edge side of the rear seat 14a. Further, the front edge side support frame 23a and the rear edge side support frame 23b are lowered by left and right side frames 27 made of a frame-like round pipe connected to the left and right main frame front portions 20a and the left and right main frame rear portions 20c. The side is supported.

A front cover 10 is attached to the front portion of the vehicle body 1. The front cover 10 includes an upper cover 10 a that covers a front wheel support frame 21 located at the front portion of the vehicle body 1 from above, and a front portion of the vehicle body 1 in front. And a lower cover 10b covering from the side. An operation panel 11 that covers the front side of the driving unit 5 is attached to the rear of the front cover 10, and a steering handle 12 that steers the left and right front wheels 3 extends from the left side of the operation panel 11. Yes.
The front driver seat frame 22 is covered with a box-shaped front seat support panel 24, and the front driver seat 13 is fixed to the front seat support panel 24. The front driver's seat 13 includes a front seat 13a fixed to the front portion of the front seat support panel 24, and a seat back 13b fixed to a reinforcing frame 32c that connects between the intermediate struts 32 of the lops 30 described later. It is configured with.

  A front deck plate 28 is fixed to the upper surface side of the main frame front portion 20a on the front side of the front driver seat constituting frame 22, thereby forming the floor surface of the front portion of the driving portion 5. . In addition, a rear deck plate 29 is fixed to the upper surface side of the main frame front portion 20a on the front side of the rear seat constituting frame 23 and the rear seat support frame 25, whereby the floor surface of the rear portion of the driving portion 5 is fixed. Is formed.

  A rear seat 14 is mounted on the upper part of the rear seat constituting frame 23 and the rear seat support frame 25. The rear seat 14 includes a rear seat 14a supported on the upper end of the rear seat support frame 25 so as to be swingable back and forth, and a seat back 14b fixed to the front side of a partition member 90 described later. Yes.

By configuring as described above, the vehicle body frame 2 includes the first core member 201 having the main frame 20 as a main material and the second core member mounted on the main frame 20 and integrally assembled. 202 in combination.
In addition, the vehicle body frame 2 is a front part of a combination of the main frame front part 20a, the main frame rising part 20b, and the second core member 202 which are located on the front side in the longitudinal direction of the main frame 20. A part frame 2A is configured, and a rear frame 2B is configured by a main frame rear part 20c configured by the cargo bed support frame 26.

[Loops]
The vehicle body frame 2 configured as described above is mounted with the lops 30 as follows to form the vehicle body core portion 200.
As shown in FIGS. 5 and 7, the LOSS 30 includes a front column 31, an intermediate column 32, and left and right rear columns 34, and is configured in a six-column system. The left and right front strut receiving portions 21a are fixed to the left and right sides of the upper portion of the front wheel support frame 21, and the front struts 31 formed of a round pipe material span the left and right front strut receiving portions 21a. It is fixed. Further, an intermediate column 32 formed of a round pipe material is fixed over the upper portions of the left and right support frames 22c of the front driver seat constituting frame 22.

Left and right first brackets 31a are fixed to the left and right sides of the upper portion of the front support column 31, and forward and left and right second brackets 32a are fixed to the left and right side portions of the upper portion of the intermediate support column 32. . The left and right upper front frames 33 formed of a round pipe material are fastened and fixed across the left and right first brackets 31a and the left and right second brackets 32a. A reinforcing frame 32c is fixed over the lower part of the vertical frame portion 32b of the left and right intermediate struts 32, and this reinforcing frame 32c functions as a handrail for a passenger seated on the rear seat 14.
A mounting bracket 32d is fixed to the reinforcing frame 32c, and the seat back 13b of the front driver seat 13 is fastened and fixed to the front side of the mounting bracket 32d (see FIG. 20).

  The upper rear frame 35 is formed of a round pipe material, and the front portion of the upper rear frame 35 is detachably clamped and fixed to the left and right third brackets 33a. The left and right third brackets 33 a are fixed to the left and right side portions of the upper portion of the intermediate support column 32.

  A left rear column 34 formed of a round pipe material is detachably extended from the left side surface of the left cargo bed support frame 26 to the left side and above, and from the right side surface of the right cargo bed support frame 26 to the right side. And above, the right rear support | pillar 34 formed with the round pipe material is extended so that attachment or detachment is possible. Downward fourth brackets 35a are fixed to the left and right sides of the rear portion of the upper rear frame 35, and the upper ends of the left and right rear columns 34 are detachably fastened and fixed to the left and right fourth brackets 35a. .

  At the lower part of the left and right rear struts 34, armrests 34a that can swing up and down around the horizontal axis x are mounted, and as shown by the solid line in FIG. In the same figure, it is configured to be switchable to a stowed storage state as shown by a virtual line.

Since the rear support column 34 and the upper rear frame 35 are detachably attached, the left and right rear support columns 34 are removed from the left and right cargo bed support frames 26, and the upper rear frame 35 is removed from the intermediate support column 32, thereby The lops 30 can be used by changing them to a four-post type lops.
Further, as shown in FIG. 7, the lops 30 is configured such that the front column 31, intermediate column 32, rear column 34, upper front frame 33, and upper rear frame 35 can be assembled and disassembled. The upper rear frame 35 is also divided in two in the left-right direction, and is configured to be detachable by an intermediate joint 35c.

[Structure of loading platform]
The structure of the loading platform 40 will be described with reference to FIGS.
FIG. 8 is a side view of the vicinity of the loading platform 40 in the extended state described later, and FIG. 9 is a side view of the vicinity of the loading platform 40 in the shortened state described later. 10 is a bottom view of the loading platform 40 in an extended state (to be described later) (a view of the loading platform 40 viewed from below), FIG. 11 is a rear view of the loading platform 40, and FIG. 12 is an extended state to be described later. It is a side view of the front part of the loading platform 40.

  13 is a detailed view for explaining a connection structure between the front bottom part 42 and the front side wall 45, and FIG. 13A is a plan view of a connection part between the front bottom part 42 and the front side wall 45. (B) is a cross-sectional top view of the connection part of the front bottom part 42 and the front side wall 45. FIG. FIG. 14 is a detailed view for explaining the connection structure of the front wall portion 46, FIG. 14A is a front view of the connection portion of the front wall portion 46, and FIG. 14B is the connection of the front wall portion 46. It is a top view of a part.

  FIG. 15 is a longitudinal side view (viewed from the inside) showing the structure in the vicinity of the first locking device 70, and FIG. 15 (a) is a longitudinal side view of the first locking device 70 in the locked state. FIG. 15B is a longitudinal side view of the first lock device 70 in the unlocked state. FIG. 16 is a detailed view showing the structure in the vicinity of the second locking device 80, and FIG. 16 (a) is a longitudinal side view of the vicinity of the second locking device 80 of the loading platform 40 in the extended state, and FIG. FIG. 6 is a plan view of the vicinity of the second locking device 80 of the loading platform 40 in a shortened state.

  As shown in FIGS. 8 and 9, the loading platform 40 includes a rear bottom portion 41 for loading a load, a front bottom portion 42 for loading the load, a rear wall portion 43 that forms the rear surface of the loading platform 40, and a loading platform 40. The left and right rear side wall portions 44 that form the side surfaces of the rear portion, the left and right front side wall portions 45 that form the side surfaces of the front portion of the loading platform 40, and the front wall portion 46 that forms the front surface of the loading platform 40 are configured. Yes. Thereby, the loading platform 40 is in an extended state in which the front portion (front wall portion 46, front side wall portion 45, front bottom portion 42) of the loading platform 40 shown in FIG. 1 state) and a shortened state (second state) in which the front part (front wall part 46, front side wall part 45, front bottom part 42) of the cargo bed 40 shown in FIG. ) And the state can be switched.

  As shown in FIGS. 8, 10, and 11, the rear bottom portion 41 is configured by fixing a plurality of frames to the lower surface side of the rear deck plate 41a, and the load on the upper surface side of the rear deck plate 41a. A flat deck surface without unevenness is formed. Long left and right loading platform rear frames 41b are fixed to the left and right sides of the lower surface of the rear deck plate 41a, and a vertical flat hinge 50 is fixed to the rear of the left and right loading platform rear frames 41b. Yes.

  A bracket 51 is fixed to the upper part of the rear portion of the loading platform support frame 26, and the hinge 50 of the loading platform rear frame 41b is supported on the bracket 51 via a hinge pin 52 so as to be swingable around a horizontal axis P1. Has been.

  A pair of left and right rod side brackets 53 are fixed to the left and right central portions of the front end portion of the rear bottom portion 41. A support frame 26a formed of a round pipe material is fixed over the left and right cargo bed support frames 26, and a pair of left and right tube side brackets 26b are fixed to the left and right central portions of the support frame 26a (FIG. 3). reference).

  The left and right rear support frames 26c are connected to the left and right sides of the support frame 26a. The left and right rear support frames 26c are bent in an L shape, and the front portions extend downward and forward. Are connected to the main frame front portion 20c of the left and right main frames 20.

  A front support member 16 made of rubber or resin is fixed to the upper surface side of the front end portions of the left and right cargo bed support frames 26. When the loading platform 40 in the extended state is lowered, a loading platform front frame 42b described later is supported by the front support member 16, and the front portion of the loading platform 40 in the extended state is supported by the loading platform support frame 26. A rubber or resin rear support member 17 is fixed to the upper surface side of the front and rear center portions of the left and right cargo bed support frames 26. When the cargo bed 40 is lowered in the extended state and the shortened state, the cargo bed rear frame 41b is formed. Supported by the rear support member 17, the front and rear center portions of the loading platform 40 in the extended state and the front portion of the loading platform 40 in the shortened state are supported by the loading platform support frame 26.

  A seat support member 18 is fixed to the upper surface side of the front part of the left and right cargo bed support frames 26, and the rear portion of the rear seat 14a in a lying posture described later is supported by the seat support member 18. The heights of the upper ends of the front and rear support members 16 and 17 are set to the same height, and the height of the upper end of the seat support member 18 is lower than the heights of the upper ends of the front and rear support members 16 and 17. Is set. Thus, a predetermined gap is formed between the upper surface side of the seat support member 18 and the loading platform front frame 42b.

  A hydraulic lift cylinder 15 that lifts and lowers the loading platform 40 over the rod side bracket 53 and the tube side bracket 26b is mounted. The elevating cylinder 15 is composed of a double-acting cylinder, and the piston rod side and the piston head side are connected to an operation valve (not shown) via hydraulic piping. As a result, when pressure oil from the operation valve is supplied to the piston head side by operating a cargo bed raising / lowering lever or a cargo bed raising / lowering switch (not shown) provided in the operation unit 5, the lifting cylinder 15 extends and the cargo bed 40 rises. To do. On the other hand, when pressure oil from the operation valve is supplied to the piston rod side by operating the platform lifting lever or the platform lifting switch provided in the operation unit 5, the lifting cylinder 15 is shortened and the platform 40 is lowered.

  The left and right rear side wall portions 44 are configured by fixing a bent rear side panel 44b across a square pipe-shaped cargo bed front column 44a and a square pipe-shaped cargo bed rear column 44c. The left and right rear side wall portions 44 are fixed to the upper surface side at the left and right end portions of the rear deck plate 41a.

  The left and right brackets 54 are fastened and fixed to the rear end portion of the rear bottom portion 41, and the rear wall portion 43 is supported on the rear end portion of the bracket 54 so as to be swingable around a left-right axis P2. ing.

  An opening / closing lever 55 is supported on the upper portions of the left and right sides of the rear wall portion 43 so as to be swingable around an axial center in the front-rear direction, and the opening / closing lever 55 is disposed above the loading column rear column 44c of the rear side wall portion 44. A metal fitting 56 that is engaged with the lock portion 55a is fixed. An elastic spring 57 is provided across the opening / closing lever 55 and the rear wall 43, and the elastic spring 57 urges the lock portion 55 a of the opening / closing lever 55 to engage with the metal fitting 56. By swinging the operating portion 55b of the open / close lever 55 against the urging force of the elastic spring 57, the rear wall portion 43 can swing open and close backward.

  A hook 58 is fixed to the loading platform rear column 44c of the rear side wall portion 44, and one end portion of the wire 59 is supported on the side surface of the rear wall portion 43 so as to be rotatable around a left-right axis. . As a result, when the rear wall 43 is swung rearward with the other end of the wire 59 hooked on the hook 58, the swing range of the rear wall 43 downward is regulated by the wire 59, and the rear wall The state where the surface of the portion 43 and the deck surface of the rear deck plate 41a are flush with each other is maintained. Conversely, when the rear wall 43 is swung backward with the other end of the wire 59 removed from the hook 58, the rear wall 43 is suspended downward.

  The front bottom portion 42 is configured by fixing a plurality of frames to the lower surface side of the front deck plate 42a, and loads on the upper surface side of the front deck plate 42a are flush with the rear deck plate 41a. A flat deck surface with no unevenness is formed. Left and right cargo bed front frames 42b that are long in the front and rear are fixed to the left and right sides of the lower surface side of the front deck plate 42a. The left and right cargo bed front frames 42b are arranged at the same position in the left and right direction as the left and right cargo bed rear frames 41b, and the height of the lower surfaces of the left and right cargo bed front frames 42b is the lower surface of the left and right cargo bed rear frames 41b. Is set to the same height as

  As shown in FIGS. 10, 12, and 13, vertical left and right brackets 61 are fastened and fixed to both left and right end portions of the front portion of the rear bottom portion 41, and left and right portions of the rear portion of the front bottom portion 42 are fixed. Vertical plate brackets 62 are fixed to both end portions. The left and right brackets 62 of the front bottom part 42 are supported by a pin 63 via a disc spring 64 so as to be rotatable about a left and right axis a. Thereby, the front bottom part 42 is supported by the front end part of the rear bottom part 41 so as to be swingable up and down around the axial center “a”.

  On the lower surface side of the rear end portion of the front deck plate 42a, a left and right strip-like plate-like member 65 is fixed, and on the lower surface side of the left and right front side wall portions 45, the front and rear strip plates are long. A plate-like member 45d is fixed. Thus, when the front bottom 42 is swung forward around the left and right axis a from the state where the front bottom 42 is raised, the plate-like member 65 is placed on the front lower surface side of the rear deck plate 41a. The left and right side portions of the front deck plate 42a are in contact with the upper surface side of the left and right plate members 45d. Then, the front deck plate 42a is positioned in a state where the upper surface of the front deck plate 42a is flush with the upper surface of the rear deck plate 41a.

  In this case, the gap between the rear end of the front deck plate 42a and the front end of the rear deck plate 41a is closed by the plate-like member 65, and the gap between the front deck plate 42a and the front side wall portion 45 is closed. Is closed by the plate-like member 45d. Thereby, it is possible to prevent the load from spilling from these gaps.

  The front side wall portion 45 is configured by fixing a bent front side panel 45b across a square pipe-like front column 45a and a vertical flat plate-like rear frame 45c. Upper and lower brackets 66 are fixed to the rear surface side of the rear frame 45c of the portion 45. A frame 67 having an upper end portion and a lower end portion bent inward is fixed to the front side of the loading platform front column 44a in the rear side wall portion 44. On the frame 67, upper and lower brackets 66 fixed to the rear frame 45c are supported by pins 68 so as to be rotatable around a vertical axis b. Thereby, the front side wall part 45 is supported by the front end part of the rear side wall part 44 so as to be able to swing left and right around the vertical axis b.

  As shown in FIGS. 12 and 14, the front wall portion 46 is configured by adhering a bent front panel 46 b to the left and right vertical plate-like side frames 46 a, and the side frames. The lower end portion of 46a extends longer than the front panel 46b.

  A frame 42c having an L-shaped vertical cross-section is fixed to the front end of the front deck plate 42a, and brackets 69 having an L-shaped cross-sectional shape are fixed to both left and right ends of the frame 42c. ing. A left-right pin 69a is fixed to the bracket 69, and a lower end portion of the side frame 46a is supported on the pin 69a so as to be rotatable around a left-right axis c. As a result, the front wall portion 46 is supported by the front end portion of the front bottom portion 42 so as to be swingable back and forth about the left and right axis c.

  As shown in FIGS. 14 and 15, a first locking device 70 that fixes the front wall portion 46 to the left and right front side wall portions 45 is provided on the upper portions of the left and right side portions of the front wall portion 46. The first lock device 70 includes a bracket 71, an operation tool 72, and an elastic spring 73. The bracket 71 is formed in a U-shape opening downward in a front view, and is fixed to the front panel 46 b of the front wall portion 46. The bracket 71 is formed with a left and right through hole, and the operation tool 72 is fitted into the through hole.

  A left and right lock hole 45A is formed in the upper part of the front column 45a of the front side wall 45, and the distal end of the operation tool 72 is configured to enter the lock hole 45A. Accordingly, the upper portions of the left and right side portions of the front wall portion 46 are supported by the left and right front side wall portions 45 by the engagement between the distal end portion of the operation tool 72 and the lock hole 45A.

  A rod-like positioning member 72 a is fixed to the operating tool 72, and an elastic spring 73 that biases the operating tool 72 laterally outward is mounted across the positioning member 72 a and the bracket 71. On the upper surface side of the bracket 71, a hole portion 71 a that opens to the front side is formed. The operation portion 72 b of the operation tool 72 is pulled inward against the urging force of the elastic spring 73, so By swinging the operating portion 72b upward and engaging the positioning member 72a with the hole 71b of the bracket 71, the operating tool 72 is pulled inward (unlocked state of the first locking device 70). Can hold.

  When the distal end portion of the operation tool 72 is positioned in the lock hole 45A of the front column 45a and the positioning member 72a is engaged with the hole portion 71b of the bracket 71, the operation portion 72b of the operation tool 72 is swung downward. The distal end portion of the operating tool 72 enters the lock hole 45A of the front column 45a by the urging force of the elastic spring 73, and the upper portions of the left and right side portions of the front wall portion 46 are supported by the left and right front side wall portions 45 ( The locked state of the first locking device 70).

  A positioning mechanism 74 is provided below the first locking device 70. The positioning mechanism 74 includes a plate-like member 75 fixed to the front side of the front column 45a and an engagement piece 76 fixed to the side frame 46a of the front wall 46. The plate-like member 75 is fitted with a resin-made engaging member 75a, and the engaging member 75a has a hole that engages with the engaging piece 76.

  When the front wall 46 is tilted upward from the state in which the front wall 46 is tilted backward about the left-right axis c, the engaging piece 76 fixed to the front wall 46 is moved forward. The front wall 46 and the front side wall 45 are positioned in the left-right direction by entering the hole of the engaging member 75a fixed to the side wall 45 side. In this case, since the inclined part 76a is formed in the front-end | tip part of the engaging piece 76, the front-end | tip part of the engaging piece 76 guided by this inclined part 76a enters into the hole of the engaging member 75a without difficulty. .

  Further, the front end of the side frame 46a of the front wall 46 comes into contact with the rear side of the engaging member 75a, and the front wall 46 and the front side wall 45 are positioned in the front-rear direction. Thereby, the position of the front end part of the operation tool 72 and the position of the lock hole 45A of the front column 45a can be accurately positioned.

  For example, even when a load is loaded on the loading platform 40 and a force that swings the front portion of the front side wall portion 45 laterally and outwardly about the vertical axis b is applied, the laterally outward swings. The force to be applied can be supported by the engagement between the plate-like member 75 and the engagement piece 76. Further, for example, even when a load is loaded on the loading platform 40 and a force that swings the upper portion of the front wall portion 46 forward about the left and right axis c is applied, the force that swings forward is applied. Can be supported by contact between the front end of the side frame 46a and the rear surface side of the engaging member 75a. Thereby, the positioning member 74 can be used also as a connection reinforcement member of the front wall part 46 and the front side wall part 45, and the intensity | strength of the loading platform 40 can be improved.

  As shown in FIGS. 12 and 13, a through hole in the left and right direction is formed in the front upper part of the rear side panel 44 b of the rear side wall portion 44, and a resin boss member 77 is fitted into the through hole. Has been. The boss member 77 is formed with a lock hole 77A facing left and right, and the inner diameter of the lock hole 77A is set to a dimension that allows the distal end of the operation tool 72 of the first lock device 70 to be easily fitted. The position of the boss member 77 (lock hole 77A) is such that when the first lock device 70 is operated in the locked state with the front bottom portion 42 raised together with the front wall portion 46, the distal end portion of the operating tool 72 is locked to the lock hole 77A. The front bottom 42 together with the front wall 46 is set at a position that stands substantially upright.

  Accordingly, the first lock device 70 that fixes the front wall portion 46 to the left and right front side wall portions 45 in the extended state of the loading platform 40 can be used in a shortened state of the loading platform 40 (the front bottom portion 42 is raised together with the front wall portion 46). In this state, the front wall portion 46 and the front bottom portion 42 can be used as a locking device for fixing the front wall portion 46 and the front bottom portion 42 to the rear side wall portion 44 side.

  As shown in FIGS. 10 and 12, on the lower surface side of the left and right side portions of the front deck plate 42a, the front bottom portion 42 is erected rearward and the front side wall portion 45 is folded to the inside of the body. A second locking device 80 is provided for fixing the inner end of the side wall portion 45 to the front bottom portion 42 side.

  As shown in FIG. 16A, the second lock device 80 includes a bracket 81, a support shaft 82, a swing arm 84, and an elastic spring 85. A bracket 81 is fixed to the lower surface side of the front deck plate 42a. The bracket 81 is formed with left and right through-holes facing left and right, and a support shaft 82 is fitted into the through-hole. A vertical mounting hole is formed in the bracket 81, and a cushion member 83 made of rubber or resin is fitted into the mounting hole.

  At the right end portion of the support shaft 82, a flat plate-like swing arm 84 is supported so as to be swingable about a left-right axis of the support shaft 82. An elastic spring 85 externally fitted to the support shaft 82 is attached across the front deck plate 42 a and the swing arm 84. The elastic spring 85 causes the swing arm 84 to move around the axis of the support shaft 82. 16 (a) is urged counterclockwise.

  A front and rear lock pin 78 is fixed to the upper portion of the front column 45a in the front side wall 45 (see FIG. 15). At the lower part of the swing arm 84, there are an engaging portion 84a that engages with the lock pin 78 of the front column 45a, a guide portion 84b that is inclined rearward and upward that guides the lock pin 78 of the front column 45a, and a swing. An operation portion 84c that is bent inward from the arm 84 is formed. A contact portion 84 d that contacts the front deck plate 45 a and restricts the swing range of the swing arm 84 is formed on the upper portion of the swing arm 84.

  Since the contact portion 84d contacts the lower surface side of the front deck plate 45a by the urging force of the elastic spring 85, the swing arm 84 moves around the axis of the support shaft 82 from the state shown in FIG. Thus, it can swing in the clockwise direction in FIG.

  As shown in FIG. 16 (b), when the front side wall 45 is folded inward with the front bottom 42 standing rearward, the lock pin 78 of the front side wall 45 guides the swing arm 84. The swinging arm 84 swings upward around the axial center of the support shaft 82 in contact with the portion 84b. Then, when the lock pin 78 of the front side wall portion 45 further moves rearward, the swing arm 84 swings downward around the left and right axial center of the support shaft 82 by the biasing force of the elastic spring 85, and the swing arm The engaging portion 84a of 84 engages with the lock pin 78 of the front side wall portion 45 (the locked state of the second locking device 80).

  In this case, since the front column 45a of the front side wall 45 is in contact with the cushion member 83, the front column 45a is located between the cushion member 83 and the engaging portion 84a of the swing arm 84 from the front-rear direction. It is in a state of being sandwiched without a gap. Accordingly, it is possible to prevent the inner end portion of the front side wall portion 45 from rattling in a state where the front bottom portion 42 is raised rearward and the front side wall portion 45 is folded to the inside of the body.

  Accordingly, when the front side wall 45 is folded inward while the front bottom 42 is raised rearward, the second locking device 80 automatically causes the inner end of the front side wall 45 to be moved to the front deck. 45a can be fixed. Thereby, the state change of the loading platform 40 can be performed simply and quickly, and the workability of the state switching operation of the loading platform 40 can be improved.

  On the other hand, when the operation portion 84c of the swing arm 84 is lifted upward against the urging force of the elastic spring 85 in a state where the front bottom portion 42 is raised rearward and the front side wall portion 45 is folded inside the body, The engagement of the engaging portion 84a with the lock pin 78 is released, and the front side wall portion 45 can swing backward (the unlocking state of the second lock device 80). When the front side wall 45 is swung back and the hand is released from the operation portion 84c of the swing arm 84, the contact portion 84d of the swing arm 84 contacts the front deck plate 42a and swings. The position of the arm 84 is positioned in the original state (the state shown in FIG. 16A).

[Change carrier length]
A switching state between the extended state and the shortened state of the loading platform 40 will be described with reference to FIG.
FIG. 17 is a schematic perspective view showing the switching state of the loading platform 40, FIG. 17 (a) is a schematic perspective view of the loading platform 40 in the extended state, and FIG. 17 (b) is between the extended state and the shortened state. FIG. 17 is a schematic perspective view of the loading platform 40 in the intermediate state, and FIG. 17C is a schematic perspective view of the loading platform 40 in the shortened state.

  As shown in FIGS. 17 (a) and 17 (b), the left and right first locking devices 70 are operated to the unlocked state, and the front wall portion 46 is swung rearward around the left and right axis c, The wall 46 is folded to the front bottom 42 side. Then, together with the front wall portion 46, the front bottom portion 42 is swung rearward about the left and right axial center “a”, and the first lock device 70 is inserted into the lock hole 77 </ b> A formed in the boss member 77 of the rear side wall portion 44. And the first locking device 70 is operated to the locked state. Thereby, the front bottom part 42 can be fixed to the left and right rear side wall parts 44 together with the front wall part 46.

  Next, as shown in FIGS. 17 (b) and 17 (c), the left and right front side wall portions 45 are swung rearward (inward) around the vertical axis b, so that the left and right front side wall portions 45 are swung. Is folded to the standing front bottom 42 side. Then, the lock pins 78 on the left and right front side wall portions 45 engage with the left and right second lock devices 80 on the front bottom portion 42. As a result, the left and right front side wall portions 45 can be fixed to the standing front bottom portion 42.

  As shown in FIG. 17C, the front and rear lengths of the cargo bed 40 (the total length of the cargo bed 40) are obtained by folding the front wall portion 46, the front bottom portion 42, and the left and right front side wall portions 45 in the above-described procedure. The state of the loading platform 40 can be switched from the extended state in which the length is extended to the shortened state in which the length of the loading platform 40 (the entire length of the loading platform 40) is shortened. In this case, the first and second locking devices 70 and 80 can easily and quickly switch the state of the loading platform 40 without using a specific tool or the like, and the workability of the state switching operation of the loading platform 40 can be improved. .

  In the extended state of the loading platform 40, the deck surface of the front bottom portion 42 located on the inner surface side of the loading platform 40, the inner surface (rear surface) of the front wall portion 46, and the inner surface of the front side wall portion 45 are shortened states of the loading platform 40. Then, it will be in the state which is not exposed to the outer side of the loading platform 40. As a result, the deck surface of the front bottom portion 42, the inner surface (rear surface) of the front wall portion 46, and the inner surface of the front side wall portion 45, which are damaged by loading the load on the loading platform 40, are loaded in the shortened state of the loading platform 40. It can prevent that the appearance of the loading platform 40 deteriorates by being exposed to the outside of 40.

  In the shortened state of the loading platform 40, the deck surface of the rear bottom portion 41, the inner surfaces of the left and right rear side wall portions 44, the inner surface (front surface) of the rear wall portion 43, and the deck surface (rear surface) of the front bottom portion 42 are surrounded. A load is loaded on the part. Thereby, damage on the outer surface side of the loading platform 40 due to the loading of the load can be prevented.

  As shown in FIGS. 17B and 17C, the left and right second locking devices 80 are operated to the unlocked state from the state where the left and right front side wall portions 45 are fixed to the standing bottom portion 42, and the left and right The front side wall 45 is swung forward (outside) about the vertical axis b. In this case, the bracket 66 on the front side wall portion 45 side contacts the frame 67 on the rear side wall portion 44 side, and the front side wall portion 45 is positioned in the front-rear direction.

  Next, as shown in FIGS. 17 (a) and 17 (b), the left and right first locking devices 70 are operated to the unlocked state, and the front bottom portion 42 and the front wall portion 46 are moved around the horizontal axis a. Swing backward (downward). In this case, the plate-like member 65 of the front bottom portion 42 contacts the front lower surface side of the rear deck plate 41a, and the left and right side portions of the front deck plate 42a contact the upper surface side of the left and right plate-shaped members 45d. Thus, the front deck plate 42a is positioned in a state where the upper surface of the front deck plate 42a is substantially flush with the upper surface of the rear deck plate 41a.

  Then, the front wall portion 46 is swung forward (upward) around the left-right axis c to operate the left and right first locking devices 70 in the locked state. In this case, the positioning mechanism 74 positions the front wall portion 46 and the front side wall portion 45 in the front-rear direction and the left-right direction, and the position of the distal end portion of the operation tool 72 and the position of the lock hole 45A in the front side wall portion 45. Is positioned. Thereby, the front part bottom part 42, the front wall part 46, and the left and right front side wall parts 45 can be fixed.

  As shown in FIG. 17A, the length of the loading platform 40 (the total length of the loading platform 40) is obtained by developing the left and right front side wall portions 45, the front wall portion 46, and the front bottom portion 42 in the above-described procedure. The state of the loading platform 40 can be switched from the shortened state in which the length of the loading platform 40 is shortened to the extended state in which the longitudinal length of the loading platform 40 (the entire length of the loading platform 40) is extended. In this case, the first and second locking devices 70 and 80 can easily and quickly switch the state of the loading platform 40 without using a specific tool or the like, and the workability of the state switching operation of the loading platform 40 can be improved. .

[Description of partition member]
Based on FIGS. 18-25, the structure of the partition member 90 arrange | positioned between the driving | operation part 5 and the rear part stacking part 6 is demonstrated.
18 is an explanatory view showing an assembled and disassembled state of the lops 30 and the partition member 90, FIG. 19 is a rear view of the vicinity of the partition member 90, FIG. 20 is a side view of the vicinity of the partition member 90, and FIG. FIG. 22 is a horizontal sectional view of the vicinity of the partition member 90, and FIGS. 23 to 25 illustrate the fixing structure of the partition member 90. 23 is a side view, and FIGS. 24 and 25 are horizontal sectional views.

  As shown in FIGS. 18 to 20, a partition member 90 is provided at the rear of the driving unit 5 to partition the driving unit 5 and the rear stacking unit 6 (which constitutes the rear wall of the driving unit 5). The partition member 90 includes a backward movement position (a position indicated by a solid line in FIG. 20) moved rearward in a shortened state of the loading platform 40, and a forward movement position (a two-dot chain line in FIG. 20) moved forward in an extended state of the loading platform 40. The position can be changed.

  As shown in FIGS. 18 and 19, the partition member 90 includes a frame member 91, a mesh member 92, and left and right upper support shafts 93. The frame member 91 includes a left and right vertical frame 91a, an upper frame 91b fixed over the upper portions of the left and right vertical frames 91a, and a lower frame 91c fixed over the lower portions of the left and right vertical frames 91a. Configured. Thereby, a rectangular opening is formed in the left and right long side view surrounded by the left and right vertical frames 91a, the upper frame 91b, and the lower frame 91c.

  The width W1 in the left-right direction of the partition member 90 is set to be narrower than the width W2 inside the left and right rear columns 34, and the width W1 in the left-right direction of the partition member 90 is the width of the inner surfaces of the left and right rail members 96 described later. And a dimension with a predetermined gap. Thereby, the support structure of the partition member 90 can be simplified while covering the space between the operation unit 5 and the rear stacking unit 6 with the partition member 90.

  The net-like member 92 is configured by mounting a net 92a provided with a plurality of ventilation holes such as a metal net, a resin net, or a punching metal on a frame-like frame 92b formed in a frame shape by a band plate material. The net-like member 92 is fixed to the frame member 91 by fastening the frame-like frame 92b so as to be detachable from the rear of the frame member 91. Left and right upper support shafts 93 are concentrically fixed to the upper ends of the left and right vertical frames 91a.

  The seat back 14b of the rear seat 14 is fastened and fixed to the front side of the lower frame 91c, and the seat back 14b of the rear seat 14 is configured to move together with the partition member 90.

As shown in FIGS. 18 and 20 to 22, left and right rail members 96 that are long in the front and rear directions are fixed inside the left and right front and rear frame portions 35 b of the upper rear frame 35. The left and right rail members 96 are formed in a U shape with a longitudinal cross-sectional shape when viewed from the back and opened laterally outward, and are fixed to the left and right front and rear frame portions 35b.
Long guide holes 96 </ b> A are formed on the inner surfaces of the left and right rail members 96, and the width of the guide hole 96 </ b> A is set to be slightly larger than the outer diameter of the upper support shaft 93. Yes.

  The left and right upper support shafts 93 of the partition member 90 are fitted in the left and right guide hole portions 96 </ b> A of the left and right rail members 96, and the distal end portion of the upper support shaft 93 in the state of being fitted in the guide hole portions 96. Is attached with a washer 97 for preventing the dropout. Thus, the upper part of the partition member 90 is supported so as to be slidable back and forth along the left and right guide hole portions 96 </ b> A of the left and right rail members 96.

  A through hole 96B (see FIG. 20) that opens upward is formed at an intermediate position of the guide hole 96A in the front-rear slide movement direction. The through hole 96B is formed in such a size that the upper support shaft 93 that slides in the guide hole 96A can be taken out. As shown in FIG. Thus, a notch for making it possible to detach is constituted.

  The partition member 90 is provided with a front position fixing mechanism 94 and a rear position fixing mechanism 95 for fixing the position of the partition member 90 at each of the forward movement position and the backward movement position.

  The front position fixing mechanism 94 is intermediate in a state where the partition member 90 is positioned near the rear of the front driver seat 13 when the partition member 90 is in the forward movement position and used in a single row seat specification that does not use the rear seat 14. As shown in FIGS. 20 to 24, the hook member 94a has a rubber band-like portion fixed to the partition member 90 side, and the hook member 94a is engaged with the hook member 94a. The removable rod 94b is provided on the intermediate column 32. Thus, the partition member 90 is engaged with the claw portion 94c on the distal end side with the rod 94b while extending the belt-like portion of the hook member 94a in a state where the partition member 90 is located near the front driver seat 13. Is fixed in a state where it is elastically pressed and biased toward the intermediate strut 32 side.

The front position fixing mechanism 94 is configured to be engaged with the intermediate column 32 on the upper side of the partition member 90, and on the lower end side of the partition member 90, the partition member 90 is connected to the intermediate column 32. However, the position of the lower end side of the partition member 90 is restricted in the front-rear direction as follows.
That is, as shown in FIG. 23, the rear side of the rear seating sheet 14 a is lifted up, and the front end side of the rear seating sheet 14 is fixed by the lock mechanism 100 described later so as not to fall down. If it does in this way, the lower end side of the partition member 90 will be located in the state pinched | interposed between the reinforcement frame 32c and the rear seating sheet 14a, and the backlash in the front-back direction will be suppressed.
Further, the lower end side of the partition member 90 uses the long hole 95b formed in a rubber band member 95a as a rear position fixing mechanism 95, which will be described later, while extending the band member 95a slightly, The seat 14a is engaged with an engagement piece 14d attached to the rear side upper end 14c. Thereby, the lower end side of the partition member 90 is connected to the rear seating seat 14a fixed in the locked posture near the rear portion of the intermediate support column 32 so as to elastically suppress the front / rear position movement.
As described above, the rubber band member 95a is a constituent member of the rear position fixing mechanism 95, and the lower end side of the partition member 90 is separated from the partition member 90 in cooperation with the rear seating sheet 14a and the lock mechanism 100 thereof. It also functions as means for regulating the position in a state where 90 is located on the front side.

The rear position fixing mechanism 95 is used in a two-row specification in which the partition member 90 is in the rearward movement position and the rear seat 14 is in use, and the rear column 34 is in a state where the partition member 90 is positioned near the rear column 34. 22 and 25, the rubber belt-like member 95a fixed to the partition member 90 side and the elongated hole 95b formed in the belt-like member 95a are engaged. A detachable pin 95c is provided on the rear column 34, and the pin 95c is engaged with the elongated hole 95b while the strip member 95a is extended while the partition member 90 is positioned on the rear side of the operation unit 5. It is configured to be fixed by
In this state, a rear position fixing mechanism 95 for fixing the position of the partition member 90 to the rear column 34 is provided between the lower part of the partition member 90 and the lower part of the rear column 34.

[Change of rear seat posture]
As shown in FIGS. 20 and 22, the rear seat 14a of the rear seat 14 is supported so as to be swingable back and forth and up and down around a left and right axis P3 on the lower side of the front edge side, and the rear seat 14a. However, the standing posture that swings forward so that the front edge side is positioned downward and the rear edge side is positioned upward, and the upper surface of the rear seat 14a swings backward when the rear seat 14a swings backward. The posture can be changed to a seatable posture that faces upward.

  A bracket 36 is fixed to the upper front side of the rear seat support frame 25. A support bracket 37 fixed to the lower portion of the front portion of the rear seating seat 14a is supported on the bracket 36 so as to be swingable around a left-right axis P3. The support bracket 37 has a left and right hole 37a.

As a result, the seat back 14b is moved forward together with the partition member 90, and the rear seating seat 14a is changed to the upright posture, so that the operator can not sit on the front side of the loading platform 40 in the extended state. The posture of the rear seat 14 can be changed to the first posture.
Further, the posture can be changed so that the rear seating seat 14a is swung rearward, and the seatback 14b is moved rearward together with the partition member 90, so that an operator can sit on the front side of the loading platform 40 in a shortened state. The posture of the rear seat 14 can be changed to the second posture positioned in the state.

  A positioning contact portion 36a that restricts the forward swing range of the rear seat 14a is formed at the lower portion of the bracket 36. A front lock mechanism 100 is attached to the tip of the bracket 36.

  The front lock mechanism 100 includes an operation unit 101 and a pin 102. When the operation portion 101 of the front lock mechanism 100 is pulled outward in the lateral direction, the pin 102 engaged with the hole 37a of the support bracket 37 is configured to move laterally outward.

  By rotating the operation unit 101 forward in a state in which the operation unit 101 is pulled laterally outward, the state where the operation unit 101 is operated laterally outward and the pin 102 is moved laterally outward can be maintained. The pin 102 is configured to be protruded inward by the biasing force of an elastic spring (not shown) built in the front lock mechanism 100 by rotating the operation unit 101 in the reversely pulled state. Yes.

  Thus, when the rear seating seat 14a is swung forward in a state where the operation portion 101 of the front lock mechanism 100 is pulled laterally outward, the lower end portion of the support bracket 37 is positioned at the positioning contact portion 36a of the bracket 36. The rear seat 14a is positioned at the position where it is swung most forward. In this state, the operation portion 101 of the front lock mechanism 100 is reversely rotated so that the pin 102 of the front lock mechanism 100 enters the hole portion 37a of the support bracket 37, so that the rear portion at the position where it is swung forward most. The standing posture of the seating seat 14a can be maintained.

  When the operation portion 101 of the front locking mechanism 100 is pulled laterally outward while the rear seating seat 14a is held in the standing posture, the engagement of the pin 102 with the hole 37a is released, and the rear seating seat 14a is released. The holding in the standing posture is released. The posture of the rear seating sheet 14a can be changed to the lying posture by tilting the rear seating sheet 14a backward. In this case, the pin 102 of the front lock mechanism 100 is set to the laterally outer side in advance in preparation for the next posture change work of the rear seating seat 14a by rotating the operation part 101 of the front lock mechanism 100 in the forward direction. The pulled state can be revealed.

  As shown in FIGS. 8 and 20, the rear seating seat 14a is configured to be held in a standing posture so that the rear portion of the rear seating seat 14a in the standing posture and the front end portion of the loading platform 40 in an extended state for dumping. And a predetermined gap can be secured between the upper front portion of the rear seating seat 14a in the standing posture and the partition member 90 at the forward movement position. . Accordingly, it is possible to prevent interference between the rear seating seat 14a in the standing posture and the loading platform 40 in the extended state, and it is possible to prevent interference between the rear seating seat 14a in the standing posture and the partition member 90 in the forward movement position.

As shown in FIG. 20, the lower end portion of the partition member 90 is in a use posture of the rear seat 14 positioned on the rear side of the operation unit 5, with respect to the rear side upper end portion 14 c of the rear seat 14 a. The position of the rear seating seat 14a is set so that the swinging of the rear seating seat 14a to the upright side can be restricted.
That is, the contact structure by the lower end portion of the partition member 90 serves as the rear lock mechanism 110 that restricts the swinging of the rear seating seat 14a to the upright side.

  By configuring the front locking mechanism 100 and the rear locking mechanism 110 as described above, the posture of the rear seating seat 14a can be changed easily and quickly, and the front locking mechanism 100 and the rear locking mechanism 110 can be used upward. The rear seat 14a can be reliably fixed in the posture and the standing posture.

[Change of rear seat space configuration]
Based on FIGS. 1, 2, 20, and 22, a description will be given of a state change state of the rear seat installation space by changing the position of the partition member 90.
The state shown in FIG. 1 is a state where the loading platform 40 is switched to the shortened state, the posture of the rear seat 14a is changed to the seatable posture, and the partition member 90 is positioned at the rearward movement position. This is a two-row specification state in which both the seat 13 and the rear seat 14 can be boarded.

  In this case, the upper and lower portions of the partition member 90 are fixed to the rear column 34 by the rear position fixing mechanism 95. In this state, the rear end upper end portion 14c of the rear seating seat 14a is in a position facing the lower end portion of the partition member 90, and swinging to the upright side is restricted.

  Next, switching from the two-row seat specification (four- or five-seater specification) shown in FIG. 1 to the single-row seat specification (two-seater specification) shown in FIG. 2 is performed as follows.

First, the engagement by the rear position fixing mechanism 95 is released, the partition member 90 is slid forward along the guide hole portion 96A of the rail member 96, and the position of the partition member 90 is changed to the forward movement position.
Next, a hook member 94a as a front position fixing mechanism 94 provided at the upper part on both the left and right sides of the partition member 90 is connected to the upper side of the intermediate strut 32 and engaged with the fixing rod 94b to separate the partition member. 90 is fixed to the intermediate strut 32.

  Thereafter, the rear seating seat 14a, whose swinging restriction by the lower end portion of the partition member 90 is released, is changed to the upright posture, the loading platform 40 is switched to the extended state, and the upper end of the rear seating seat 14a is changed to the upright posture. A belt-like member 95a as a rear position fixing mechanism 95 is connected to the side, and the two-row seat specification (four- or five-seater specification) shown in FIG. 1 is changed to the one-row seat specification (two-seater specification) shown in FIG. The specification of the driving unit 5 is changed.

In order to return from this one-row seat specification (two-seater specification) to the two-row seat specification (four- or five-seater specification) shown in FIG. 1, conversely, the loading platform 40 is switched to the extended state, From the state where the rear seating seat 14a is changed to the standing posture and the partition member 90 is changed to the forward movement position, the loading platform 40 is switched to the shortened state, and the rear seating seat 14a is changed to the lying posture.
Then, the engagement of the hook member 94a as the front position fixing mechanism 94 of the partition member 90 and the fixing rod 94b on the intermediate strut 32 side is released, and the rear seating seat 14a whose posture is changed to a standing posture is further provided. The engagement of the belt-like member 95a connected to the upper end side is also released, so that the partition member 90 can be moved backward.

The upper support shaft 93 of the partition member 90 is slid rearward along the guide hole 96A of the rail member 96, and the partition member 90 is moved by the rear position fixing mechanism 95 in a state where the partition member 90 reaches the rearward movement position. Secure to the rear strut 34. In this state, the rear end edge side of the rear seating seat 14a is in a position facing the lower end portion of the partition member 90, and the swing to the standing posture side is restricted.
In this way, the specification of the driving unit 5 is changed from the one-row seat specification (two-seater specification) shown in FIG. 2 to the two-row seat specification (four or five-seater specification) shown in FIG.

[Configuration of the motor section]
The driving unit 120 disposed at the lower rear portion of the vehicle body frame 2 is configured as follows.
As shown in FIG. 26, in the driving unit 120, an engine 121 serving as a driving force source for the work vehicle, a transmission case 122 connected to the rear part of the engine 121, and a hydrostatic pressure connected to the rear side of the transmission case 122. And a continuously variable transmission 123, which are integrally connected to each other, and a support frame 26a installed between the left and right cargo bed support frames 26, and a rear part of the main frame front portion 20a on the lower front side of the fuselage from the support frame 26a. It is supported in a suspended state by a rear support frame 26c that is bent in an L shape as viewed from the side and extends toward the end side (see FIG. 1).

The engine 121 in the prime mover 120, as shown by the phantom line in FIG. 26, is approximately near the center in the left-right direction of the rear seat 14 with the rear seat 14a in the second posture and on the lower side thereof. By switching the rear seating seat 14a to the first posture in which the rear seating seat 14a is erected as shown by a solid line in the drawing, the upper side is opened.
As shown in the figure, since the transmission case 122 and the like exist below the loading platform 40, when the loading platform 40 is dumped, the driving section 120 below the opening is opened and the transmission case 122 is opened. This makes it easier to perform maintenance inspections.

A radiator 124 having an electric cooling fan 124a is disposed on the left side of the engine 121, and a battery 125 is disposed on the right side on the opposite side. These radiator 124 and battery 125 are also arranged below the rear seating seat 14a in the second posture, and the upper side is opened together with the engine 121 by switching to the first posture in which the rear seating seat 14a is raised. It becomes a state.
As described above, the radiator 124 and the battery 125 are distributed on the left and right sides of the engine 121, so that the rear seat has a shorter front and rear length than the case where the radiator 124 and the battery 125 are arranged side by side on one side of the engine 121. It is advantageous in that it can be opened simultaneously by the opening operation of 14, and the left-right balance of the vehicle body can be improved.

  As shown in FIGS. 26 and 27, the radiator 124 is disposed in an inclined posture in which the suction surface 124b directed outward is inserted toward the body side toward the front side with respect to the longitudinal direction of the body. As shown by the arrows in FIG. 26, the air blowing direction by the cooling fan 124 a is directed to the engine 121, the transmission case 122, the hydrostatic continuously variable transmission 123, and the exhaust pipe 126 and the muffler 127 derived from the engine 121. It faces diagonally backward.

  The outer cover 128 of the radiator 124 is configured to be detachable with respect to the vehicle body frame 2, and an intake recess 128 a that is recessed toward the inside of the machine body is formed on a lateral outer surface portion thereof. A number of intake openings 128c are formed in the cover intake surface 128b at a position facing the suction surface 124b of the radiator 124 in the intake recess 128a.

  The rear deck 29 located on the front side of the radiator 124 is generally formed in a box shape, and a large number of ventilation openings 29c are formed on the lateral side surface 29a and the rear surface 29b. Yes. Note that the rear deck 29 on the side where the battery 125 is disposed also has the same structure as that on the side where the radiator 124 is disposed.

  Under the front seat 13a of the front driver's seat 13, although not included in the concept of the driving unit 120 of the present invention, as shown in FIG. 26, there are a fuel tank 130, a hydraulic oil tank 131, and the like. The fuel tank 130 and the hydraulic oil tank 131 can be opened by opening the front seat 13a.

  Although not shown in the drawings, the back side of the rear seat 14 is made of a heat-resistant material having resistance to heat generated by the engine 121 arranged in the vicinity, and a backing material made of a material having heat insulation properties and sound absorption properties. Is equipped.

[First Alternative Embodiment of the Invention]
In the above-mentioned “Best Mode for Carrying Out the Invention”, the front bottom portion 42 and the front wall portion 46 are folded up while standing on the rear side, and then the left and right front side wall portions 45 are folded back. Although the example which comprised was shown, a different order may be employ | adopted as an order which folds the front wall part 46, the front part bottom part 42, and the right and left front side wall part 45, for example, the right and left front side wall part 45 is made into the back side. After folding in, the front bottom 42 together with the front wall 46 may be erected on the rear side and folded.

  In the above-mentioned “Best Mode for Carrying Out the Invention”, the front wall portion 46, the front bottom portion 42, and the left and right front side wall portions 45 are folded rearward so that the loading platform 40 is extended and shortened. However, the structure of the cargo bed 40 as shown in FIG. 28 may be adopted. FIG. 28 is a schematic perspective view of the loading platform 40 in this another embodiment.

  As shown in FIG. 28 (a), the loading platform 40 includes a front loading platform 40F and a rear loading platform 40R. The front bottom 42, the left and right front side walls 45, and the front wall 46 are Each is fixed. The lower part of the rear end of the front cargo bed 40F is supported at the front end portion of the rear cargo bed 40R so as to be swingable around a laterally-oriented axis d.

  As a result, the front cargo bed 40F is supported by the rear cargo bed 40R so as to be swingable integrally around the left and right axis d, and the front cargo bed 40F indicated by the solid line in FIG. The state can be switched between an extended state in which the entire length of the loading platform 40 is increased and a shortened state in which the loading platform 40 indicated by a two-dot chain line in FIG. It is configured. In addition, the locking device (not shown) which fixes the front part carrier 40F in the extended state and the shortened state to the rear part carrier 40R side is provided over the front part carrier 40F and the rear part carrier 40R.

  As shown in FIG. 28 (b), the loading platform 40 includes a front loading platform 40F and a rear loading platform 40R. The front bottom 42, the left and right front side walls 45, and the front wall 46 are Each is fixed. The front cargo bed 40F is supported by the rear cargo bed 40R so as to be slidable back and forth along the wall surface of the rear cargo bed 40R via a slide mechanism (eg, slide rail, slide guide, etc.) not shown.

  As a result, the front cargo bed 40F is supported by the rear cargo bed 40R so as to be slidable integrally, and the front cargo bed 40F indicated by the solid line in FIG. 28 (b) is integrally slid forward to increase the overall length of the cargo bed 40. The rear loading platform 40R shown by the two-dot chain line in FIG. 28B is integrally slid backward and the overall length of the loading platform 40 is shortened so that the state can be switched. In addition, the locking device (not shown) which fixes the front part carrier 40F in the extended state and the shortened state to the rear part carrier 40R side is provided over the front part carrier 40F and the rear part carrier 40R.

  Further, although not shown in the figure, the loading platform 40 is configured integrally without adopting a folding structure or a sliding structure (configured so that the entire length of the loading platform 40 cannot be expanded and contracted), and the integrated loading platform 40 is configured as follows. The front support 46 and the front bottom 42 are moved forward and backward by supporting the load carrier support frame 26 so as to be slidable integrally and sliding the load carrier 40 back and forth integrally with the load carrier support frame 26. You may comprise.

[Second Embodiment of the Invention]
In the above-mentioned “best mode for carrying out the invention” and “first alternative embodiment of the invention”, the partition member 90 is slid along the rail member 96 to move the partition member 90 forward. Although an example in which the position can be changed between the position and the rearward movement position has been shown, a different configuration may be adopted as a configuration in which the partition member 90 can be changed between the forward movement position and the rearward movement position. Specifically, for example, the partition member 90 at the forward and rearward movement positions is detachably attached to the lops 30, and the partition member 90 fixed to the lops 30 at one of the forward and rearward movement positions is removed and removed. A removable partition member 90 that fixes the partition member 90 to the lops 30 at the other of the forward or backward movement positions may be employed.

[Third Another Embodiment of the Invention]
In the above-mentioned “best mode for carrying out the invention”, “first alternative embodiment of the invention”, and “second alternative embodiment of the invention”, the partition member 90 at the forward and backward movement positions is provided. Although an example configured to be fixed to the lops 30 has been shown, different configurations may be adopted as a configuration for fixing the partition member 90 at the front and rear movement positions to the vehicle body side, such as the vehicle body frame 2 and the front seat. The partition member 90 at the forward and backward movement positions may be fixed to the support panel 24, the rear deck plate 29, etc., and the lops 30 from the vehicle body frame 2, the front seat support panel 24, the rear deck plate 29, etc. Another frame member (not shown) may be extended, and the partition member 90 at the forward and backward movement positions may be fixed to the frame member.

  Further, the partition member 90 at one of the forward and rearward movement positions is fixed to the lops 30, and the partition member 90 at the other of the forward and rearward movement positions is supported by the body frame 2 and the front seat. You may comprise so that it may fix to the panel 24, the rear deck board 29, etc. FIG.

[Fourth Embodiment of the Invention]
In the above-mentioned “Best Mode for Carrying Out the Invention”, “First Alternative Embodiment of the Invention”, “Second Alternative Embodiment of the Invention”, and “Third Alternative Embodiment of the Invention” Although the working vehicle provided with the loadable platform 40 at the rear portion of the vehicle body 1 is shown as an example, the present invention can be similarly applied to a non-dumpable working vehicle (not shown) in which the loading platform 40 is fixed to the rear portion of the vehicle body 1.

  In the above-mentioned “Best Mode for Carrying Out the Invention”, “First Alternative Embodiment of the Invention”, “Second Alternative Embodiment of the Invention”, and “Third Alternative Embodiment of the Invention” The loading platform 40 including the turning members (rear wall portion 43, rear sidewall portion 44, front sidewall portion 45, front wall portion 46) is shown as an example. The present invention can be similarly applied to a flat deck loading platform (not shown) that does not include a turning member. Further, the present invention can be similarly applied to a van specification loading platform (not shown) provided with a ceiling member.

[Fifth Embodiment of the Invention]
The front position fixing mechanism 94 and the rear position fixing mechanism 95 are made of rubber as a means for elastically biasing and stopping as described in the above-mentioned “Best Mode for Carrying Out the Invention”. The structure is not limited to the one using the belt-like member, and an appropriate structure may be adopted, for example, using a coil spring or a belt-like member made of a synthetic resin material having elasticity.
Further, the positional relationship between the hook member 94a and the fixing rod 94b, the positional relationship between the belt-like member 95a and the pin 95c, and the like are determined between the partition member 90 and the intermediate column 32 or the rear column 34. You may provide in the reverse relationship with the case demonstrated in "the best form for inventing."

[Sixth Embodiment of the Invention]
The posture change of the rear seat 14 is not limited to the swing operation with the seat front edge as a fulcrum as described in “Best Mode for Carrying Out the Invention”. For example, the rear seat 14 is slid back and forth. The position may be changed by operation, or the posture may be changed by detachment.

[Seventh Embodiment of the Invention]
In the above-mentioned “Best Mode for Carrying Out the Invention” and “First Alternative Embodiment of the Invention”, the length of the loading platform 40 is changed to change to a single row seat specification or a double row seat specification. However, the present invention is not limited to this. For example, in the two-row seat specification, the loading platform 6 is completely absent, and in the one-row seat specification, a space corresponding to the loading platform 40 is formed on the rear side of the front driver seat 13. It may be made to become.

Overall side view of work vehicle with two-row seat specifications Overall side view of work vehicle with single row seat specifications Overall plan view of work vehicle with two-row seat specifications The perspective view which shows a vehicle body core part The perspective view which shows the state which isolate | separated the vehicle body frame and the lops The perspective view which shows the state which isolate | separated the 1st core member and the 2nd core member. Perspective view showing disassembled state of Lopse Side view near the loading platform in the extended state Side view near the loading platform in the shortened state Bottom view of cargo bed in extended state Rear view of cargo bed Side view of cargo bed in extended state Detailed view explaining the connecting structure of the front bottom and the front side wall Detailed view explaining the connecting structure of the front wall Longitudinal side view showing the structure near the first locking device Detailed view showing the structure near the second locking device Schematic perspective view showing the loading state of the loading platform The perspective view which shows the separation state of a lops and a partition member Rear view near the partition Side view near the partition Longitudinal rear view explaining the support structure above the partition member Transverse plan view near the partition member Side view showing the front position fixing mechanism of the partition member Horizontal sectional view showing the front position fixing mechanism of the partition member Horizontal sectional view showing the rear position fixing mechanism of the partition member Plan view showing the prime mover Perspective view showing the radiator mounting location The schematic perspective view of the loading platform in 1st another form of implementation of invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body 2 Body frame 2A Front frame 2B Rear frame 5 Driving part 6 Rear loading part 13 Front driving seat 14 Rear seat 14a Rear seating seat 20 Main frame 21 Front wheel support frame 22 Front driver seat constituent frame 23 Rear seat constituent frame 30 LOSS 31 Front strut 32 Intermediate strut 34 Rear strut 34a Armrest 40 Loading platform 90 Partition member 120 Driving section 124 Radiator 125 Battery 200 Car body core section 201 First core member 202 Second core member 203 Third core member

Claims (7)

Provided on the vehicle body frame a driving unit in which the front driver seat and the rear seat installation space are arranged in front and rear, a rear frame disposed on the rear side at a position higher than the floor of the driving unit, and thereafter The vehicle body frame is configured with a front frame arranged to support the floor surface of the driving unit on the front side of the part frame,
A driving part is arranged below the rear frame, and a rear part of the rear seat installation space is arranged overlapping the upper side of the rear frame,
A posture in which the rear seat disposed in the space for installing the rear seat is positioned on the upper side of the rear frame so as to cover the driving portion, and a posture in which the upper side of the rear frame is opened and the driving portion is visible. A work vehicle configured to be switchable.   The position change of the rear seat is a non-use state in which the first posture enabling the visual recognition of the driving portion is moved to the front side, and the second posture covering the driving portion moved the rear seat to the rear side. The work vehicle of Claim 1 comprised so that it may be in use.   The work vehicle according to claim 1 or 2, wherein a rear loading unit provided on the rear side of the driving unit is configured by a dumping bed. A partition member for partitioning between the rear loading unit and the driving unit;
The work vehicle according to claim 3, wherein the partition member is configured to be changeable between a forward movement position moved to the rear part of the front driver seat and a rearward movement position moved to the rear part of the rear seat.   5. The driving portion is disposed below the left and right central portions of the rear seat in the second posture, and a radiator is disposed below one of the right side portion and the left side portion of the rear seat in the second posture. The work vehicle described.   The work vehicle according to claim 5, wherein a battery is disposed below the side opposite to the side where the radiator is disposed on the right side or the left side of the rear seat in the second posture. A lops covering the front driver seat and the rear seat, and left and right rear struts of the lops are provided on the rear lateral outside of the rear seat;
The left and right rear struts are provided with armrests for passengers seated on the rear seats, and the armrest is extended from the rear strut side to the front, and the retracted posture along the rear struts. The work vehicle according to any one of claims 1 to 6, wherein the work vehicle is configured to be changeable in posture.

Images