JP3169392B2 - Transport vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a self-propelled traveling unit,
The present invention relates to a transport vehicle including a worktable detachably mounted on a traveling machine unit.

[0002]

2. Description of the Related Art Conventionally, a transport vehicle used for transporting materials, fertilizers, crops, etc. in agriculture, forestry work, landscaping work, etc., has an engine mounted on a rear part of a frame having a track-type traveling part in which a transmission is arranged below a front part. And a driving section, and the carrier was mounted on the remaining frame.

[0003] However, in the above-mentioned transport vehicle, since the loading platform is fixed to the frame, no other working machine can be mounted on the frame. It was not available.

Accordingly, the present applicant has filed Japanese Patent Application No. Hei.
In Japanese Patent Publication No. 3 (1993), a self-propelled traveling machine unit in which a transport vehicle is provided with various working machines on the upper side of a frame having traveling means on both sides, and an engine and a driving unit provided on the rear side of the frame, We propose a transport vehicle that consists of various working machines mounted on the machine unit, and has male and female type engaging parts at the front and rear of the mounting unit of the traveling machine unit and at the front and rear corresponding parts of the working machine unit. ing.

[0005] By the action of the male-female type engaging portion, the working machine portion can be detachably attached to the traveling machine portion, and
By preparing various working machines, the transport vehicle can be used for other work other than transport.

[0006]

As described above, if the transport vehicle is separated into a traveling machine section and a working machine section and both are detachable, the transport vehicle can be used for various purposes.

However, in order to mount the working unit on the traveling unit, it is necessary to lift the working unit to a position above the mounting unit of the traveling unit. There was a problem that the machine unit could not be mounted on the traveling machine unit.

That is, when the working machine is equipped with a working machine which can be moved to an arbitrary position by a hydraulic cylinder such as an earth removal plate or a backhoe, the working machine uses the power of the working machine and the hydraulic cylinder. Since the part itself can be lifted, the working machine part can be mounted on the traveling machine part.

[0009] However, in the case of a worktable having only a lifting / lowering function for vertically moving the loading platform and having no working machine for moving to an arbitrary position, the worktable itself cannot be lifted. Impossible, use of the workbench was impossible.

Further, if the work table is provided with a lift cylinder for lifting the work table itself, the work table can be mounted on the traveling machine part, but this method greatly increases the cost. There was a problem.

[0011]

A self-propelled traveling machine unit having a carrier with an upper part of a frame provided with traveling means on both sides as a mounting part, and an engine and a driving part provided on a rear side of the frame,

A lower frame mounted on a mounting portion of the traveling machine unit, an upper frame supported by the lower frame via a parallel link and an elevating cylinder so as to be able to move up and down, and a work table comprising a carrier supported by the upper frame. ,

[0013] A male / female type engaging portion provided at the front and rear of the mounting portion of the traveling machine portion and at a position corresponding to the front and rear of the lower frame of the worktable, and front and rear provided at both front and rear ends of the lower frame of the worktable. A front support leg and a rear support leg. The front support leg and the rear support leg can be positioned at two positions, a horizontal position and a vertical position, respectively. Column having a ground plate grounded to the ground
And a spring that constantly presses the column to the rear end side . When the front support leg and the rear support leg are in the vertical position, the rear end of the column is lifted up and down on the loading platform. This is to face the contact surfaces provided at the four corners.

[0014]

When the work table is mounted on the traveling machine section, the front support legs and the rear support legs are positioned at the vertical position, and the rear ends of the columns are supported by the contact surfaces of the four corners of the loading platform at the lowered position. By pressing, each column is projected downward, and the work table is lifted.

[0015]

1 to 10 show a carrier (A) according to the present invention.

The carrier (A) shown in FIG. 1 comprises a self-propelled traveling unit (B) and a worktable (C) detachably mounted on the traveling unit (B). .

In the traveling machine section (B), a frame (2) provided with traveling means (1) such as crawler tracks or multi-row wheels on both sides is used as a mounting section (3) for a worktable (C), (2)
An engine (4) and an operating unit (5) are provided on the rear end side of the vehicle.

The self-propelled function is, for example, to incorporate a transmission behind the frame (2) and to drive the front wheels (6) forward and reverse from the engine (4) via the transmission so that the front and rear of the frame (2) The running means (1) attached endlessly to the erected front wheel (6) and rear wheel (7) is rotated back and forth.

As shown in FIG. 6, a hook-shaped female side engaging portion (1) is provided before and after the mounting portion (3) of the traveling machine portion (B).
0) and (11) are fixed.

The front female engaging portion (10) has a hook-shaped recess (10a) extending in the running direction.
The front surface of a) is open, the lower jaw side of the concave portion (10a) extends forward from the upper jaw side, and the upper surface on the lower jaw side is a mountain-shaped guide cam surface (10b).

The rear female engaging portion (11) has a V-shaped concave portion (11a) which is inclined and opened upward and forward, and a pin hole (11b) is formed at the bottom of the concave portion (11a). Is formed.

The work table (C) mounted on the traveling machine section (B) is a rectangular frame-shaped lower frame (15).
An upper frame (17) supported by a lower frame (15) via a parallel link (16) so as to be able to move up and down; and a loading platform (1) mounted on the upper frame (17) so as to be dumpable.
8) and a front support leg (19) and a rear support leg (20) pivotally attached to the front and rear sides of the lower frame (15) so as to be rotatable by 90 degrees.

In the front and rear portions of the lower frame (15),
Male side engaging portions (21) and (22) are provided.

The front male side engaging portion (21) has pins (23) on both sides thereof so as to engage with the concave portions (10a) of the front female side engaging portion (10) of the traveling machine portion (B). ).

The rear male side engaging portion (22) has a guide bush (26) having a pin hole (25) at the tip of the bracket (24).

Then, the pin (23) of the front male engaging portion (21) is fitted into the front female engaging portion (10), and the male engaging portion (21) and the female engaging portion are engaged. (10) and the guide bush (26) of the rear male engaging portion (22).
Is guided into the concave portion (11a) of the rear female side engaging portion (11), the pin holes (25) and (11b) of both are aligned, the coupling pin (27) is inserted, and the male side engaging portion is inserted. The lower frame (15) of the worktable (C) is fixed on the traveling machine (B) by connecting the (22) and the female side engaging portion (11).

The lower frame (15) and the upper frame (1
7), the lower end of the parallel link (16) is rotatably supported at the tip of the lower frame (15) via a pivot (30), and the upper end is slidable on the upper frame (17). The supported first link (31), the upper end of which is rotatably supported at the tip of the upper frame (17) via a pivot (32), and the lower end of which is slidably supported by the lower frame (15). The two links (33) are connected in an X-shape via connecting pins (34), and an elevating cylinder (35) is interposed between the first link (31) and the second link (32). It has a structure.

The upper frame (17) is moved relative to the lower frame (15) by extending and retracting the lifting cylinder (35) to change the angle between the first link (31) and the second link (33). It is made to go up and down.

As shown in FIGS. 7 to 10, a front support leg (19) disposed at the front of the lower frame (15) penetrates the front of the lower frame (15) in the width direction and has a collar. The shaft (4) rotatably supported via (40)
1), a guide cylinder (42) fixed to both ends of the shaft (41), and a support (43) penetrating the guide cylinder (42).
The support plate (43) has a ground plate (4
4) is fixedly provided, and a spring (45) is interposed between the rear end of the guide cylinder (42) and the rear end flange of the column (43). It is pressed to the rear end side.

The rear support legs (20) arranged at the rear of the lower frame (15), like the front support legs (19), pass through the rear of the lower frame (15) in the width direction and have a collar (50). ) Rotatably supported through a shaft (5)
1), a guide tube (52) fixed to both ends of the shaft (51), and a support (53) penetrating the guide tube (52).
The support plate (53) has a ground plate (5
4) is fixed, and a spring (55) is interposed between the rear end of the guide tube (52) and the rear end flange of the support (53), and the support (53) is always It is pressed to the rear end side.

The front support leg (19) and the rear support leg (20) incorporate a stopper mechanism (60) for fixing them both horizontally and vertically.

The stopper mechanism (60) is, for example, a shaft (41) on one side of the lower frame (15).
A bracket (61) having a flat plate portion is fixed to a place where (51) penetrates, and an inner peripheral surface of the bracket (61) is provided at a position of the shaft (41) (51) facing the bracket (61). An L-shaped stopper (62) is fixed along the lower frame (15), and the shaft (41) (51) on the other side of the lower frame (15) and the shaft (41)
(51) A spring (64) is press-fitted between the spring (64) and a spring stopper (63) fixed to the outer periphery, and the shaft (41) (5)
1) is always pressed in the direction of arrow A in FIGS. 7 and 9.

When the front and rear support legs (19) and (20) are supported in a horizontal state, the outer surface of an L-shaped stopper (62) is provided on the inner surface of the bracket (61), and the shaft ( 41) Prevent the rotation of (51).

In order to move the front and rear support legs (19) and (20) from the horizontal state to the vertical state, the shafts (41) and (51) are moved against the elastic force of the spring (64) by the arrow B in FIG. In this direction, the L-shaped stopper (62) is once released from the bracket (61), and in this state, the shafts (41) and (51) are rotated by 90 degrees, and the front and rear support legs (19) and (20) are moved. After the vertical position, the spring (6
The shaft (41) (51) is slid in the direction of the arrow A in FIG. 9 by the elastic force of 4), and the outer surface of the L-shaped stopper (62) is abutted on the inner surface of the bracket (61). 41) The detent of (51) is performed.

At the four corners of the loading platform (18), the columns (4) of the front and rear support legs (19) and (20) are in a vertical state.
3) A contact surface (70) is provided for contacting the rear end surface of (53).

A dump cylinder (71) in FIG. 3 is interposed between the upper frame (17) and the loading platform (18). ) Is dumped about the pivot (32).

In the above configuration, when the work table (C) of the transport vehicle (A) according to the present invention is installed independently, as shown in FIGS. While holding the support legs (19) and (20) vertically, and lowering the upper frame (17), the contact surfaces (70) provided at the four corners of the carrier (18) on the upper frame (17) are removed. , And abut on the rear ends of the columns (43) and (53) of the front and rear support legs (19) and (20), compress the springs (45) and (55), and lower the columns (43) and (53). By sliding the work table (C) to the side, the work table (C) is installed at a predetermined position while being supported by the columns (43) and (53).

In this state, each column (43)
A through hole (72) is formed in a portion of (53) protruding from the guide cylinders (42) and (52).
By inserting the stopper pin (73) through 2), the columns (43) and (53) slide upward, so that the work table (C) does not fall.

Next, when the work table (C) installed at a predetermined position and the traveling machine section (B) are combined and the work table (C) is moved to an arbitrary position, the work table (C) ) And the traveling unit (B) are opposed to each other, and then the traveling unit (B) is advanced toward the work table (C), and the traveling unit (B) is interposed between the four columns (43) and (53). The front female side engaging portion (10) and the front male side engaging portion (21) are opposed to each other, and the rear female side engaging portion (11) and the rear male side are positioned. Engagement part (2
2) is opposed. Next, as shown in FIG. 3, the upper frame (17) is raised and the loading platform (18) is raised, so that the contact surfaces (70) at the four corners of the loading platform (18) are separated from the columns (43) and (53). If each pillar (43) (53)
Is moved upward by the elastic force of the springs (45) and (55), and the lower frame (15) of the worktable (C) is mounted on the mounting part (3) of the traveling machine part (B). The pin (23) of the front male side engaging portion (21) is fitted into the concave portion (10a) of the female side engaging portion (10), and the rear female side engaging portion (1) is fitted.
The pin hole (11b) of 1) and the pin hole (25) of the guide bush (26) of the rear male engaging portion (22) coincide with each other.

Therefore, in this state, both pin holes (11b)
After the connecting pin (27) is inserted between (25) and the traveling machine section (B) and the worktable (C) are integrated, and the front and rear support legs (19) and (20) are horizontal. Then, when the upper frame (17) is lowered, as shown in FIG. 4, the union of the traveling machine section (B) and the worktable (C) is completed, and thereafter, the worktable (C) is moved to the traveling machine section (B). ) Makes it possible to move to any place.

In order to support the work table (C) in a stable state during the work after the traveling machine section (B) and the work table (C) are combined, first raise the upper frame (17). Then, after the front and rear support legs (19) and (20) are changed from the horizontal state to the vertical state, the upper frame (17) is lowered.

Then, the contact surface (7
0) is the support (4) of the front and rear support legs (19) and (20).
3) The spring comes in contact with the rear end face of (53) and the spring (45)
In order to push down the columns (43) and (53) downward against the elastic force of (55), as shown in FIG.
Is lifted together with the worktable (C).

Thereafter, a stopper pin (73) is inserted into a through hole (72) provided in each of the columns (43) and (53) to prevent the columns (43) and (53) from descending. (43) Because (53) acts as an outrigger,
The traveling unit (B) and the worktable (C) are supported in a stable state.

When the work table (C) is separated from the traveling machine section (B), the upper frame (1) is temporarily moved from the state shown in FIG.
7) and then the front and rear support legs (19) (20)
From the horizontal state to the vertical state, and the pin hole (11b) of the rear female side engaging portion (11) and the rear male side engaging portion (2).
2) Withdraw the coupling pin (27) from the pin hole (25) of the guide bush (26).

Thereafter, by lowering the upper frame (17) in this state, the contact surfaces (70) at the four corners of the carrier (18) are
Each support (43) (5) of the front and rear support legs (19) (20)
3) The work platform (C) is brought into contact with the rear end surface and pushes down the columns (43) and (53) against the elastic force of the springs (45) and (55). The work table (C) is lifted from the mounting section (3), and is separated from the traveling machine section (B).

[0046]

As described above, the work platform of the transport vehicle according to the present invention is constructed such that the support columns of the front and rear support legs provided at the four corners of the lower frame of the work platform are moved up and down in the vertical state. Since the work table is lifted only by the power of the lifting cylinder, the work table itself can be lifted without providing a dedicated lift cylinder to lift the work table itself. It was made possible.

The front and rear support legs can also be used as outriggers for supporting the traveling unit and the worktable in a stable state when working with the worktable.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which a traveling machine unit and a workbench of a transport vehicle according to the present invention are separated.

FIG. 2 is a schematic front view of FIG.

FIG. 3 is a side view at the time of mounting work on the traveling machine unit of the work table.

FIG. 4 is a side view showing a state at the time of completion of mounting of the worktable on the traveling machine unit.

FIG. 5 is a side view showing a state where the front and rear support legs are used as outriggers.

FIG. 6 is a side view showing the female engaging portions at the front and rear portions.

FIG. 7 is a plan view showing the front and rear support legs in a horizontal state.

FIG. 8 is a side sectional view of FIG. 7;

FIG. 9 is a plan view showing the front and rear support legs in a vertical state.

FIG. 10 is a side sectional view of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS A Transport vehicle B Traveling machine part C Work table 1 Running means 2 Frame 4 Engine 5 Operating part 10 Female engaging part at the front part 11 Female engaging part at the rear part 15 Lower frame 16 Parallel link 17 Upper frame 18 Carrier 19 Front Part supporting leg 20 Rear supporting leg 21 Front male engaging part 22 Rear male engaging part 35 Lifting cylinder 42 Guide cylinder 43 Support 44 Grounding plate 45 Spring 52 Guide cylinder 53 Support 54 Grounding plate 55 Spring 70 Contact surface

Claims (1)

(57) [Claims] 1. A self-propelled traveling machine unit having a carrier with an upper part of a frame provided with traveling means on both sides as a mounting part, and an engine and a driving part provided on a rear side of the frame, and mounting the traveling machine part. A lower frame mounted on the lower frame, an upper frame supported by the lower frame via a parallel link and an elevating cylinder so as to be able to move up and down, a work table including a loading platform supported by the upper frame, It is composed of male and female engaging parts provided at the front and rear, and at the front and rear corresponding portions of the lower frame of the worktable, and front support legs and rear support legs provided at both front and rear ends of the lower frame of the worktable. and, the front support legs and rear support legs, respectively, has a horizontal position and positionable guide tube in two positions of the vertical position, through the guide tube, a ground plate for contact with the ground at the tip
The support and a spring that constantly presses the support to the rear end
When the front support leg and the rear support leg are in the vertical position, the rear end of the column is supported by the lifting support 4
A transport vehicle characterized in that it faces a contact surface provided at a corner.