JP3045475B2 - Frame structure of small passenger work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure of a small work vehicle.

[0002]

2. Description of the Related Art Conventionally, as one form of a small passenger car, a pair of left and right front wheels are attached to a pair of left and right main frames via a front axle case, and a pair of left and right rear wheels are connected to a rear axle case. The main frame supports an operating unit, an engine, and a transmission case.

[0003]

However, in the above-mentioned small passenger work vehicle, for example, when performing agricultural work on a terraced rice field in a mountainous area, the vehicle travels on a narrow, often ascending and descending inclined road surface and moves to the rice terraced rice field. At this time, at the time of traveling on a descending slope, if the step surface is horizontal, the operator cannot step on the foot and gives a sense of fear to the operator, while at the time of traveling on an up slope, there is no protective member behind. There is a problem of giving anxiety to the operator.

[0004] In an orchard or the like, a tilling work machine may be connected to the rear of a small passenger work vehicle to perform middle tillage weeding while moving between trees. Contact with standing fruit trees may result in damage to the fruit trees.

[0005]

Therefore, according to the present invention, a pair of left and right front wheels and rear wheels are mounted on a pair of left and right main frames extending in the front-rear direction, respectively. And a sub-frame is attached to the main frame, and the sub-frame extends in the left-right width direction and extends between the front ends of the left and right main frames. A left and right frame forming body extending rearward from the left and right ends, wherein the left and right frame forming bodies are inclined from the front end toward the rear downward and a stepped surface forming portion; And a laterally inclined portion inclined rearward and upward from an end to a lateral position of a seat of the driver's seat. Than it is.

The present invention also has the following configuration.

[0007] The left and right frame forming bodies are respectively disposed immediately above the front and rear wheels.

[0008] A grip portion is provided in a middle portion of the left and right frame forming bodies, and the grip portion is arranged on a side of a seat of a driving unit.

[0009] A roll bar formed in a front view portal type is straddled between the left and right frame forming bodies at a position immediately behind the seat provided in the driving unit.

[0010] The roll bar is located substantially vertically at a position near a backrest provided on a seat of the driving unit;
It can be turned upside down between the position where it falls down backward.

[0011] A sun visor portion that projects forward is provided on the top of the roll bar.

[0012] A handle post is provided upright on a front portion of the main frame in a direction substantially orthogonal to a tread surface forming portion of the sub frame.

The sub frame and the roll bar are each formed of a round body.

[0014]

Embodiments of the present invention will be described below.

In the small passenger work vehicle according to the present invention, a pair of left and right front wheels are mounted on a front portion of a pair of left and right main frames via a front axle case, and a pair of left and right rear wheels are mounted on a rear portion via a rear axle case. Attached to form a vehicle body support structure.

An operating section, a transmission case, an engine, and a fuel tank are provided on the vehicle body support structure, an elevating mechanism is attached to a rear end of the body frame via a stay, and a luggage container is attached to the elevating mechanism.

As described above, the vehicle body supporting structure is constituted by the pair of left and right main frames, the pair of left and right front axle cases, the rear axle, and the pair of left and right front and rear wheels, and thus, is constituted by the vehicle body wheels. The weight of the body support structure has been significantly reduced.

Further, since power lines such as a transmission case and an engine are not used as constituent members of the vehicle body supporting structure, the weight of these power lines can be reduced.

A sub-frame is attached to the main frame. The sub-frame extends in the left-right direction and extends between the front ends of the left and right main frames. Left and right frame forming body extended rearward from the end,
The left and right frame forming bodies include a tread surface forming portion that slopes rearward and downward from the front end, and a side surface that slopes rearward and upward from the rear end of the tread surface forming portion to the side position of the seat of the driving section. By providing an inclined portion and forming a tread surface portion in the tread surface forming portion, when traveling on a down sloped road surface, the operator can step on the tread surface with his / her feet, and fear the operator. So that they can be eliminated.

By arranging the left and right frame forming bodies directly above the front and rear wheels, respectively, the left and right frame forming bodies contact the planted fruit trees as an outer peripheral portion of the machine. Even if there is, the fruit tree can be protected without damaging the fruit tree, and the left and right frame forming bodies function as guard frames to protect the operator.

A grip portion is provided on a laterally inclined portion of the left and right frame forming bodies, and the grip portion is disposed beside a seat of the driving unit. The user can easily get on and off by gripping the part.

At a position immediately behind the seat provided in the driving unit, a roll bar formed in a front view portal shape is straddled between the left and right frame forming bodies, so that when traveling on an upwardly inclined road surface, the operator is provided with an operator. I am trying to give a sense of security.

[0023] The roll bar can be freely raised and lowered between a position that stands substantially vertically and a position that is laid down rearward at a position near a backrest provided on a seat of the driving unit.
If necessary, the roll bar can be raised to protect the operator, or the roll bar can be laid down to load luggage and the like.

When storing the apparatus in a hangar or the like,
By lowering the roll bar, the storage space can be reduced.

By providing a sun visor part which is protruding forward at the top of the roll bar, the operator can be protected from direct sunlight and the fatigue of the operator can be reduced.

By arranging the handle post on the front portion of the main frame in a direction substantially perpendicular to the tread surface forming portion of the sub-frame, the operator sitting on the seat of the driver can step on the tread formed in the tread surface forming portion. The handle mounted on the upper end of the handle post can be operated in a comfortable posture in which the foot is placed on the surface, and the operability of the handle can be improved.

The sub-frame and the roll bar can be bent in any direction in a three-dimensional space by being formed of a round pipe, and the number of welded parts can be reduced to improve the design. So that it can be enhanced.

A pair of left and right front wheels are attached to a pair of left and right main frames extending in the front-rear direction via a front axle case, and a pair of left and right rear wheels are attached via a rear axle case. Between the respective axles, the transmission case and the engine are arranged on the main frame, the transmission case is arranged near the front axle, and the engine is arranged near the rear axle. The weight balance is improved, and the stability of the vehicle body during steering operation is improved.

In addition, the transmission case and the engine are arranged at positions equal to or higher than the ground height of the main frame, respectively, so that farming can be performed while the machine is running over a ridge formed on the field. At this time, the transmission case and the engine are prevented from hitting ridges and crops.

A transmission case is disposed at the front of the main frame, and a pair of left and right front axle cases are interlockedly connected to the transmission case. A rear axle case disposed behind the transmission case is connected to the transmission case via a transmission shaft. By interlocking and connecting the side axle to the rear axle case, steering operation can be performed by four-wheel drive, making it possible to travel easily on mountainous areas with many sloping roads, and turning performance by operating the side clutch. We have ensured that it can be secured well.

By arranging the driver's seat at a position immediately above the transmission case disposed at the front of the main frame, the operator's line of sight, which is seated on the seat and performs steering operation, is secured at a high position. As a result, the visibility in front of the vehicle body can be ensured well, and the safety at the time of steering operation can be enhanced.

The frame structure includes a pair of left and right main frames extending in the front-rear direction along the left and right sides of the engine, and a loop-shaped step frame swelling left and right sides at the front of both main frames. By mounting and forming a pair of left and right subframes extending rearward from the rear of the step frame, it is possible to reduce the weight while maintaining rigidity, and to reduce the number of parts of the frame structure. ing.

The step frame can be formed by being bent in a free direction in a three-dimensional space by being formed of a round pipe, and the number of welded parts can be reduced to improve the design. Like that.

By providing the accessory storage section on the upper part of the bonnet, small articles such as tools necessary for maintenance work can be stored in the accessory storage section, so that maintenance can be performed quickly even at the farm work site. ing.

Moreover, since the accessory storage section is provided above the bonnet, the operator can enter and leave tools and the like in the accessory storage section in a comfortable posture.

The height of the operator's viewpoint can be appropriately changed by adjusting the position of the seat according to the working condition by making the seat provided in the driving unit adjustable in the elevating position. And work safety.

A pair of left and right sub-frames extending in the front-rear direction are arranged at upper positions on the left and right outer sides of the main frame, and a reflector is attached to a rear end of each sub-frame. It is made visible through.

Moreover, the reflector is mounted at the rear end of the sub-frame disposed on the upper left and right sides of the main frame, so that the reflector can be easily viewed from behind.
It is designed to ensure safety during night driving.

In the case where the sub-frame is a hollow pipe, the rear end of the sub-frame can be closed by a reflector. It is possible to prevent dust and the like from entering.

By providing an elevating mechanism at the rear end of the main frame and attaching a luggage container to the elevating mechanism, if it is necessary to transport the luggage, the luggage can be accommodated and transported in the luggage container. Like that.

In addition, the luggage container is raised and lowered by the lifting mechanism so that the luggage can be easily loaded and unloaded so that the loading and unloading operation can be performed smoothly.

[0042]

Embodiments of the present invention will be described below with reference to the drawings.

A shown in FIGS. 1 to 3 is a first embodiment according to the present invention.
The small passenger work vehicle A according to the embodiment has a pair of left and right front wheels 3 mounted on a front part of a body frame 1 via a front axle case 2 and a rear axle case 4 mounted on a rear part. The rear axle case 4 has side clutches 4a, 4a provided on the left and right sides of the rear axle case 4, respectively. 3a is a front axle, 5a is a rear axle.

An operating section 7, a transmission case 8, an engine 9, a fuel tank 10, and a muffler 11 are provided on the vehicle body support structure 6, and an elevating mechanism 12 is
The luggage container 14 is attached to the lifting mechanism 12.

In this embodiment, the luggage container 14 is attached to the lifting mechanism 12, but various working machines such as a tilling work machine can be mounted to the lifting mechanism 12; More power can be taken out and driven.

As shown in FIGS. 1 to 3, the body frame 1 has a pair of left and right main frames 20, 2 extending in the front-rear direction.
0 and a substantially U-shaped sub-frame 21 erected between the front ends and the rear ends of the main frames 20, 20, and a front-view portal type erected on the sub-frame 21 so as to be capable of being turned upside down. Roll bar 22 and the rear ends of the main frames 20, 20 and the subframe
21 and a support frame 23 interposed between the rear frame 21 and the rear end.

The sub-frame 21 extends in the left-right width direction and extends between the front ends of the left and right main frames 20, 20, and rearward from the left and right ends of the front frame formation 24. Left and right frame formations extended toward
25,25.

The left and right frame forming bodies 25, 25
They are located directly above the front and rear wheels 3, 3, 5, and 5, respectively, and have sloped surface forming portions 25a, 25a inclined downward and rearward from the front end, and from the rear end of each stretched surface forming portion 25a, 25a. Side inclined portions 25b, 25b which are inclined rearward and upward to the side position of the seat 36 of the driving section 7, which will be described later;
The rear extension portions 25c, 25c extend substantially horizontally from 25b to a position above the rear ends of the main frames 20, 20.

The side inclined portions 25b, 25b are provided with grip portions 26, 26, respectively, and the grip portions 26, 26 are disposed on the left and right sides of the seat 36 of the driving unit 7.

Reflectors 70, 70 are mounted on the rear ends of the side inclined portions 25b, 25b, respectively.

Further, the left and right stepped surface forming portions 25a, 25
a, an inclined tread surface portion 71 extending from the front end toward the rear downward on the same plane as the tread surface formation portions 25a, 25a, and the operator places his foot on the tread surface portion 71. The handle operation can be performed in a comfortable posture, and the operator can step on the step surface 71 when traveling on a downward slope.

The roll bar 22 is located at a position immediately behind the seat of the driving unit 7 and has a rear extension 25c, 25c of the sub-frame 21.
c, a pair of right and left support portions 22a, 22a, and a sun visor portion 22b extending between the upper ends of the support portions 22a, 22a and extending forward in a U-shape in plan view. doing.
Reference numeral 72 denotes a hood mounted on the sun visor section 22b. The hood 72 is appropriately mounted at a time when the sunshine is strong, so that the operator can be protected from direct sunlight.

The pair of right and left support portions 22a, 22a have lower ends attached to the rear extension portions 25c, 25c, respectively.
The upper and lower vertical brackets 29, 29 are attached to the rear surfaces of the lower ends of the columns 22a, 22a.
On the other hand, a pair of upper and lower fixing pin holes 29a, 29a, 29a, 29a are formed on the upper and lower surfaces of the supporting brackets 27, 27, respectively.

In addition, the roll bar 22 is pivoted about the pivots 28 between a position approximately vertically standing near a backrest provided on the seat of the driving unit 7 and a position where the roll bar 22 is laid down rearward. The fixing pin holes 27a, 29a formed on the support brackets 27, 27 and the fixing brackets 29, 29 at the standing position and the falling position are aligned with each other, and the fixed pin holes are aligned.
The roll bar 22 can be fixed by inserting a fixing pin 30 into 27a and 29a.

Here, the main frames 20, 20, the sub-frame 21, and the roll bar 22, which are the respective components of the body frame 1, are formed using round pipes.

As shown in FIGS. 1 to 3, the operating portion 7 has a handle post 31 erected at the front end of the main frames 20, 20 in a direction substantially orthogonal to the tread surface forming portions 25 a, 25 a of the sub-frame 21. The handle 32 is attached to the upper end of the handle post 31, and the main frame located behind the handle 32
A seat support 33 is disposed on the seat support 20, 20 and a seat support plate 34 is placed on the seat support 33 via a seat elevating mechanism 35 so as to be adjustable in a vertical position. Is placed. 36a is a seat, and 36b is a backrest.

Further, the seat 36 has a mounting bracket 37 projecting downward at the front lower surface, and a plurality of mounting holes 37a formed in the mounting bracket 37 at intervals in the front-rear direction.
34, a pivot bracket 38 having a pivot hole 38a is provided so as to protrude therefrom, and a mounting bracket 38 is attached to the pivot hole 38a of the pivot bracket 38.
The seat 36 can be freely adjusted in the front-rear position and can be turned forward by turning any one of the mounting holes 37a of the 37 and matching with each other, and inserting and supporting the pivot pin 39. 40 is a cushion rubber.

Further, the above-mentioned seat elevating mechanism 35 is provided with an elevating / lowering adjusting lever 35a, and by operating the elevating / lowering adjusting lever 35a, the seat 36 can be adjusted up / down position via the seat support plate 34.

A movable shaft case provided at the lower end of the handle post 31 and the left and right ends of the front axle case 2
A steering mechanism (not shown) is interposed between the front wheels 2b and 2b so that the front wheels can be steered.

Below the seat support 33, a transmission case 8 is disposed in the vicinity of the front axle 3a, and the engine is disposed in a position behind the transmission case 8 and in the vicinity of the rear axle 5a. 9 and a fuel tank 10 is disposed on the right side of the engine 9. These are a front axle 3a and a rear axle 5a.
And the main frame (20,
It is located at a position equal to or higher than the ground clearance (H) in 20). Reference numeral 41 denotes a battery, and reference numeral 42 denotes a transmission belt wound between the output pulley 9a of the engine 9 and the input pulley 8a of the transmission case 8.

The transmission case 8 has the front axle case 2 interlocked and connected thereto.
Are interlockingly connected via a transmission shaft (not shown).

The upper part of the engine 9 and the fuel tank 10 is shown in FIG.
As shown in FIG. 4, it is covered with a bonnet 45, and an accessory storage section 46 is provided above the bonnet 45.

In the accessory storage section 46, a recess 46a having an upper surface opening is formed in the ceiling wall of the bonnet 45, and an opening / closing lid 46b is attached to the recess 46a so as to be openable and closable. 46c is an opening / closing pivot, 46d is a closure locking hook, and 46e is a hook receiver.

As shown in FIG. 1, the lifting mechanism 12 includes a pair of left and right lift arms 12a, 12a and a pair of left and right lower links 12b,
12b, lift links 12c and 12c, a top link 12d, and a lift cylinder (not shown).

The luggage container 14 is provided with a top link connecting piece 14a at the upper part of the front wall, and the lower link connecting pieces 14b, 14b at the lower part of the front wall.
And are detachably attached to the top link 12d and the lower links 12b, 12b of the lifting mechanism 12 by connecting pins 47, 48.

FIGS. 5 and 6 show a small passenger work vehicle A as a second embodiment. The small passenger work vehicle A has a basic structure similar to that of the first embodiment. Same, but the left and right frame forming bodies 2 of the sub-frame 21
The roll bar support portions 25d, 25d are formed by bending the rear ends of the side inclined portions 25b, 25b vertically upward without forming the rear extension portions 25c, 25c on the roll bar support portions 25d. 25d,
The difference is that the roll bar 22 is straddled so as to be able to move up and down between 25d.

In FIGS. 5 and 6, reference numeral 73 denotes a roll bar.
Mounting brackets 73a, 25e mounted on the lower ends of the support portions 22a, 22a of 22 are fixing pin holes formed in the mounting bracket 73 and the roll bar support portion 25d, respectively, and are fixed in the corresponding fixing pin holes 73a, 25e. By inserting and removing the pin 30, the roll bar 22 can be fixed to the standing position and the falling position.

FIGS. 7 and 8 show a small passenger work vehicle A as a third embodiment. The small passenger work vehicle A has a basic structure similar to that of the first embodiment. Although the same is true, the shape of the vehicle body frame 1, the mounting structure of the front axle case 2, and the shape and the arrangement position of the fuel tank 10 are different, and different portions will be described below.

That is, as shown in FIGS. 7 and 8, the body frame 1 has a pair of left and right main frames 20, 20 extending in the front-rear direction along the left and right sides of the engine 9, and both main frames 20, 20. And a pair of left and right sub-frames 21 and 21 formed by extending toward the rear from the rear left and right positions of the step frame 50 and attached to the front of the step frame 50 and bulging left and right. A substantially U-shaped support frame 23 is provided between the rear ends of the sub-frames 21 and 21 and the rear ends of the main frames 20 and 20.

The main frames 20 and 20 and the step frame 50 are arranged on the same horizontal plane, and the sub-frames 21 and 21 extend rearward and upward from the front end to a position on the front end side of the seat 36 of the driving unit 7. Inclined front inclined portions 21a, 21a; side inclined portions 21b, 21b inclined rearward and upward from a rear end of the front inclined portions 21a, 21a to a rear end side position of the engine 9; And a connecting portion 21c for connecting the front ends of the inclined portions 21b, 21b. Reference numeral 67 denotes a seat support frame laid between the middle portions of the pair of left and right side inclined portions 21b, 21b.

As described above, by forming the body frame 1, the weight is reduced and the number of parts is reduced while securing the required rigidity.

A handle post support 51 is laid horizontally between the front portions of the main frames 20, 20, and the handle post 31 is erected on the support 51 so as to extend rearward and upward.
52 is a pitman arm and 62 is a handle column.

The front axle case 2 is shown in FIGS.
As shown in FIG. 3, an L-shaped case support 53 is provided between the main frame 20 and the sub-frame 21, and the upper portion of the vertically long fixed side shaft case 2a is fixed to the case support 53. The upper end of the vertically long movable side shaft case 2b is coaxially connected to the lower end of the fixed side shaft case 2a so as to be rotatable around the axis, and the front axle 3 and the front axle 3a are connected to the lower end of the movable side shaft case 2b. Mounting through. 54 is a vertical axis passing through the fixed-side shaft case 2a and the movable-side shaft case 2b, 55 and 56 are upper and lower bevel gears attached to upper and lower ends of the vertical axis 54, and 57 is a front axle 3a.
And a large-diameter bevel gear 58 meshed with the lower bevel gear 56, and 58 is a fixing bolt.

The upper portion of the fixed shaft case 2a of the front axle case 2 is connected to the transmission case 8 via a horizontally long transmission shaft 59. Reference numeral 60 denotes a transmission bevel gear attached to the transmission shaft 59 and meshed with the upper bevel gear 55. Reference numeral 61 denotes a transmission shaft insertion hole formed in the case support 53.

The front axle case 2 is detachably attached to the case support 53 via fixing bolts 58 so that maintenance and assembly work can be performed easily, and the front axle case 2 and the case support 53
A tread adjusting cylinder (not shown) is interposed between the front wheels 3 and 3 so that the tread of the front wheels 3 and 3 can be easily adjusted.

A steering mechanism (not shown) is provided between the knuckle arm 2c protruding from the movable side shaft case 2b and the pitman arm 52 so that a steering operation can be performed.

As shown in FIGS. 7 and 8, the fuel tank 10 is mounted on the main frames 20, 20 at a position immediately behind the transmission case 8, and is formed in a flat box shape and has a ceiling wall. A transmission shaft extending in the front-rear direction formed in the central portion of the groove 10a extending in the front-rear direction.
The transmission shaft 65 connects the transmission case 8 and the rear axle case 4 in an interlocking manner.

The engine 9 is disposed immediately above the fuel tank 10.

In this way, the fuel tank 10 and the engine 9 are compactly arranged without causing interference with the transmission shaft 65.

FIGS. 10 and 11 show a small passenger work vehicle A as a fourth embodiment.
Has the same basic structure as the small passenger work vehicle A as the third embodiment, but in the vehicle body frame 1, the sub frame 21 is divided into a front rising portion 21d, a front-rear horizontal extension portion 21e, and a rear rising portion. The difference is that it is formed integrally with the portion 21f. Reference numeral 66 denotes a connecting frame that connects the rear ends of the main frames 20,20.

[0081]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, the front frame forming body extends between the front ends of the left and right main frames, and the sub frame attached to the main frame extends in the left-right width direction. A left and right frame forming body extending rearward from the left and right side ends of the body, wherein the left and right frame forming bodies are inclined from the front end toward the rear downward, and a tread surface forming portion; And a side inclined portion inclined rearward and upward from the rear end to the side position of the driver's seat from the rear end, so that the stepped surface portion is formed in the stepped surface forming portion, so that the descending slope road surface is formed. When the vehicle travels, the operator can put his / her foot on the tread surface and step on it, eliminating the fear of the operator.

According to the second aspect of the present invention, since the left and right frame forming bodies are respectively disposed immediately above the front and rear wheels, the outer peripheral edge of the present machine is not provided for the planted fruit trees. Even if the left and right frame forming bodies may come into contact with each other, the fruit tree can be protected without damaging the fruit tree, and the left and right frame forming bodies function as guard frames to protect the operator. .

According to the third aspect of the present invention, the grip portion is provided on the laterally inclined portion of the left and right frame forming bodies,
Because the grip is located on the side of the driver's seat,
When the operator gets on and off the driving section, the operator can easily get on and off by holding the grip section.

According to the fourth aspect of the present invention, since a roll bar formed in a front view portal type is straddled between the left and right frame forming bodies at a position immediately behind the seat provided in the driving unit, When traveling on an upward slope, the operator can be provided with a sense of security.

According to the fifth aspect of the present invention, the roll bar is raised near a backrest provided on the driver's seat between a substantially vertical position and a rearward position. Since the roll bar is free to fall, the roll bar can be raised as necessary to protect the operator, or the roll bar can be laid down to store luggage and the like.

When storing the apparatus in a hangar or the like,
The storage space can also be reduced by laying down the roll bar.

According to the sixth aspect of the present invention, since the sun visor portion extending forward is provided at the top of the roll bar, it is possible to protect the operator from direct sunlight and reduce operator fatigue. can do.

According to the seventh aspect of the present invention, since the handle post is provided on the front portion of the main frame in a direction substantially orthogonal to the stepped surface forming portion of the sub frame,
The operator seated on the driver's seat can operate the handle attached to the upper end of the handle post in a comfortable position with his feet on the tread surface formed in the tread surface formation part, and improve the operability of the handle. Can be improved.

According to the present invention, since the sub-frame and the roll bar are each formed by a round pipe, they can be formed by bending in a free direction in a three-dimensional space. The number of parts can be reduced, and the design can be improved.

[Brief description of the drawings]

FIG. 1 is a side view of a small passenger work vehicle according to the present invention.

FIG. 2 is a plan view of the small passenger work vehicle.

FIG. 3 is a front view of the small passenger work vehicle.

FIG. 4 is a cross-sectional side view of the accessory storage unit.

FIG. 5 is a side view of a small-sized riding work vehicle as a second embodiment.

FIG. 6 is a plan view of the small-sized passenger work vehicle.

FIG. 7 is a side view of a small-sized riding work vehicle as a third embodiment.

FIG. 8 is a plan view of the small-sized passenger work vehicle.

FIG. 9 is a sectional front view of a front axle case.

FIG. 10 is a side view of a small-sized riding work vehicle as a fourth embodiment.

FIG. 11 is a plan view of the small-sized passenger work vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS A Small passenger work vehicle 1 Body frame 2 Front axle case 3 Front wheel 4 Rear axle case 5 Rear wheel 6 Body support structure 7 Operating part 8 Shift case 9 Engine 10 Fuel tank

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-9987 (JP, A) JP-A-59-179186 (JP, A) JP-A-60-261733 (JP, A) JP-A-62 221975 (JP, A) Japanese Utility Model 1-79912 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62D 21/18 B62D 25/00-25/08 B62D 25/14- 25/22 B62D 49/00

Claims (8)

(57) [Claims] 1. A pair of left and right front wheels (3, 3) and a rear wheel are provided on a pair of left and right main frames (20, 20) extending in the front-rear direction.
(5,5) and attach the front wheels (3,3) and rear wheels (5,5) .
The seat (36) of the driver (7) is placed between the main frame (20, 20) and the sub-frame (21). A front frame forming body (24) extended between the front ends of the left and right main frames (20, 20), and a front frame forming body (2
4) a left and right frame forming body (25, 25) extending rearward from the left and right ends, and the left and right frame forming bodies (25, 25) are inclined downward from the front end toward the rear downward. Tread surface forming parts (25a, 25a) and the seat (36) of the driver (7) from the rear end of each tread surface forming part (25a, 25a)
Side inclined part (25
(b, 25b). 2. The small work vehicle according to claim 1, wherein the left and right frame forming bodies (25, 25) are respectively arranged at positions immediately above the front and rear wheels (3, 3, 5, 5). Frame structure. 3. A grip portion (26, 26) is provided in the middle of the left and right frame forming bodies (25, 25), and the grip portion (26, 26) is provided.
2. The frame structure for a small-sized passenger work vehicle according to claim 1, wherein the frame is arranged on a side of the seat (36) of the driving section (7). 4. A roll bar (22) formed in a front view portal type between right and left frame forming bodies (25, 25) at a position immediately behind a seat (36) provided in a driving section (7). The frame structure for a small-sized passenger work vehicle according to claim 1, wherein the frame structure is mounted. 5. The roll bar (22) is connected to a seat (3) of the driving unit (7).
5. A small-sized device according to claim 4, wherein a position near the backrest (36b) provided in (6) can be freely turned between a position which stands substantially vertically and a position where it falls down rearward. Frame structure of passenger work vehicle. 6. The frame structure for a small-sized passenger work vehicle according to claim 4, wherein a sun visor portion (22b) extending forward is provided on the top of the roll bar (22). 7. A handle post (31) is provided at a front portion of a main frame (20, 20) to form a stepped surface forming portion of a sub-frame (21).
The frame structure for a small-sized passenger work vehicle according to claim 1, wherein the frame structure is erected in a direction substantially orthogonal to (25a, 25a). 8. The sub-frame (21) and the roll bar (22)
The frame structure for a small passenger work vehicle according to any one of claims 4 to 6, wherein the frame structure is formed of a round pipe.