JP2002154437A - Transport dolly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the easiness in handling and simplify the structure. SOLUTION: A transport dolly according to the present invention includes a dolly frame 5 on which the front 3 and rear wheels 1 are mounted and is structured so that a lift table 10 is installed on the dolly frame 5 through links 6 and 7 in such a way as capable of elevating and sinking so that the lift table 10 is elevated and sunk by a lift cylinder 22, wherein a front 19 and a rear rising tool 20 are installed on the load placing part and rear oversurface of the lift table 10, and a hand-push handle 18 is removably attached to the front rising tool 19 or the rear rising tool 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transport trolley for loading, lifting and transporting loads such as truck tires.

[0002]

Conventionally, a lift base is mounted on a bogie frame on which front and rear wheels are provided via links so that the lift base can be raised and lowered, and the lift base is raised and lowered by a lift cylinder, and a truck tire is mounted on the lift base. In the case of attaching and detaching a tire from a truck, there is a problem that a push-pull operation push handle provided on a bogie frame or a lift stand becomes an obstacle for tire detachment work, and that the lift stand is formed in a forked shape so that a tire is formed. When the tire is lifted, the weight of the tire generates a deforming force in the direction that separates the bifurcated lift table to the left and right when the tire is lifted. And the link for supporting the lift table is formed in an X-shape, so that the lift table can be supported stably with a simple and lightweight structure. However, the incorporation of a lift cylinder into the X-type link mechanism has the disadvantage that the ground height at the lowest position of the lift table cannot be lowered, and the handling operability has been improved and the structure has been simplified and lightened. There is a problem that it cannot be obtained.

[0003]

According to the present invention, there is provided a transport vehicle in which a lift platform is mounted on a bogie frame provided with front and rear wheels via a link so as to be able to ascend and descend by a lift cylinder. A front / rear standing tool is provided on the lift table luggage loading section and the upper surface of the rear of the lift table, and the hand handle is detachably attached to the front or rear tool, for example, for attaching and detaching truck tires. The loading / unloading operation can be easily performed by removing the push handle serving as an obstacle, and the hand can be easily operated depending on the size of the load, for example, a front wheel having one tire or a pair of rear wheels having two tires. The push handle mounting position can be selected either in the middle or the rear of the lift table, and the push handle can easily be used as a support frame for luggage such as tires, which can easily fall over. It is intended to obtain achieving such simplification of ease.

In addition, two front and rear two left and right receiving rollers are provided on the lift luggage loading portion, and a front standing tool is fixed to the lift luggage loading portion on the side of the bearing provided between the front and rear receiving rollers. By using two front and rear receiving rollers, it is possible to easily simplify the receiving roller structure and reduce the weight and cost for the same allowable baggage weight, and to reduce the minimum ground clearance by making the receiving roller small in diameter. In addition, the front stand can be disposed by utilizing the space of the upper surface of the lift table between the front and rear receiving rollers, and the front stand is provided within the left and right widths without increasing the left and right widths of the lift table. It is possible to easily reduce the weight and size of the device and simplify the structure.

Further, a lift table is mounted on a bogie frame provided with front and rear wheels via links so as to be able to move up and down, and the lift table is moved up and down by a lift cylinder. In the transport vehicle provided in the luggage loading portion, the guide wheel at the link end is rotatably inserted into the rail groove on one side of the lift table, and the support shaft of the guide wheel fixed to the link is opposite to the rail groove. Even if there is a deformation force that pushes the left and right lift tables outward when lifting the luggage such as tires so as to be sandwiched by the forked lift table, it protrudes on the opposite side to the rail groove. The end surface of the support shaft can be abutted against the side surface of the lift base to prevent the guide wheel from being detached, and the lift base can be formed in a simple shape of the downward opening U-shaped end surface, for example, as compared with the structure of the downward opening C-shaped end surface. Lightweight Can form the lift platform at a low cost, it is intended to obtain aim to facilitate and simplify and weight of the structure.

[0006] Further, in a transport vehicle in which a lift table is mounted on a bogie frame provided with front and rear wheels via a link so that the lift table can be raised and lowered by a lift cylinder, a lift cylinder is provided within a substantially vertical width of the bogie frame. The cylinder body is provided substantially vertically, and by providing a lift cylinder on the bogie frame, the minimum ground clearance of the lift base can be easily reduced, and the cylinder body is stored within the vertical width of the bogie frame, for example, a tire. When loading and unloading work such as loading and unloading work, obstacles on the upper surface of the bogie frame can be easily eliminated, handling operability can be improved, and the structure can be simplified.

[0007] A large head cylinder head provided with upper and lower pistons extending and contracting in multiple stages on substantially the same axis and a small head cylinder head provided only with the upper piston are provided interchangeably with the cylinder body of the lift cylinder. The maximum height of lifting the load can be changed only by selecting the cylinder head, shortening the length of the cylinder body, easily reducing the vertical width of the bogie frame, and facilitating the maximum lift of the lift base And it is possible to easily change the specifications of the lift cylinder, simplify the structure and reduce the weight, and the like.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is an overall side view, FIG. 2 is a plan view thereof, FIG. 3 is a front view thereof, FIGS. 4 and 5 are enlarged side views of rear and front portions, and FIGS. 6 and 7 are enlarged plan views of rear and front portions. FIG. As shown in FIGS. 1 to 7, a pair of left and right leg frames (4) provided with a pair of left and right front wheels (3) on a front portion thereof on a base frame (2) provided with a pair of left and right rear wheels (1) capable of changing directions. The rear portion is integrally fixed to form a truck frame (5) having a fork in plan view, and a pair of links (6) and (7).
An X-type link mechanism (9) is provided for connecting the lift base (10) to the bogie frame (5) via two sets of left and right links (6) and (7) so that the lift base (10) can be raised and lowered freely. Install. Further, the rear portions of the pair of left and right carrier frames (11) are integrally fixed to the rear frame (12) to constitute the lift platform (10) having a bifurcated shape in plan view.
1) Two front and rear receiving rollers (16) are supported on the front and intermediate bearing bodies (13) and (14) on the upper surface and the rear frame (12) via a core shaft (15).
As shown by the imaginary line, the truck tires (17) as luggage are placed on two front and rear two pairs of receiving rollers (16), and one front wheel tire (17) and two pairs of rear wheels are provided. The tire (17) is detached from the truck, and work such as maintenance of the truck axle is performed.

In addition, the round pipe is bent into a gate shape to form the push handle (18), and the push handle (18) is formed.
A pair of front and rear standing fixtures (19) and (20) having a pair of left and right cylindrical shapes for detachably fitting the lower end portions on both sides of the carrier frame (1).
1) It is fixed to the upper surface of the front and rear width middle and the upper surface of the back frame (12), and the push handle (18) is erected via the left and right front uprights (19) at the middle of the front and rear width of the carrier frame (11). A front wheel tire (17) having a one-wheel structure is supported on left and right receiving rollers (16) on the front side, and a push handle (18) is erected on a rear frame via left and right rear standing tools (20). The two-wheeled rear wheel tire (17) is supported on four receiving rollers (16), and the tire (17) is secured by a rubber band (not shown) hooked on a hook (21) of a hand push handle (18). ) To prevent falling.
A lift (10) supported by a pair of left and right X-shaped link mechanisms (9) is moved up and down by control of a hydraulic lift cylinder (22), and a tire (17) removed from an axle of a truck.
Is moved to the storage position, or the tire (17) in the storage position is returned to the truck maintenance position when the maintenance of the axle is completed, and the tire (17) to be mounted and demounted is carried out.

As is clear from the above, the front and rear wheels (3)
Link (6) to the bogie frame (5) on which (1) is provided
(7) A lift truck (10) is mounted so as to be able to move up and down via a lift cylinder (22), and the lift platform (10) is moved up and down by a lift cylinder (22).
0) The front and rear standing tools (19) and (20) are provided on the luggage placing portion and the upper surface of the rear of the lift table (10), and the push handle (18) is moved to the front standing tool (19) or the rear standing tool (20). ), And the loading / unloading operation such as attaching / detaching a truck tire (17) can be an obstacle to the hand push handle (1).
8) It can be removed, and the position of the hand push handle (18) is lifted according to the size of the load, for example, the front wheel of one tire (17) or the rear wheel of two tires (17). The handle (18) can also be used as a support frame for luggage, such as the tire (17), which can be selected as either the middle or the rear of the table (10), improving handling operability and simplifying the structure. Plan.

Further, two pairs of receiving rollers (1
6) is provided on the lift platform (10) on the luggage placing portion, and a front support (19) is provided on the lift platform (10) on the side of the bearing (14) provided between the front and rear receiving rollers (16). Is fixed, and the distance between the bearings at both ends of the receiving roller (16) is halved by using two front and rear receiving rollers (16), and the structure of the receiving roller (16) is simplified for the same allowable load weight. In addition, the receiving roller (16) can be reduced in size and the minimum ground clearance can be reduced by reducing the diameter of the receiving roller (16).
6) Using the upper surface space of the loading frame (11) of the lift platform (10), the front upright (19) is arranged to enlarge the lateral width of the loading platform frame (11) of the lift platform (10). The fore-standing tool (19) is provided within the left and right widths without any effort to reduce the weight and size of the carrier frame (11) of the lift platform (10) and to simplify the structure.

Further, as shown in FIGS. 5, 7 and 8, bearing brackets (23) and (24) are fixed to the front portions of the leg frame (4) and the carrier frame (11), and the respective links (6) are fixed. (7) Connect the front end side to each bracket (23) (2).
4) is connected rotatably via a support shaft (25). Also, the bearing guide wheel (26) is connected to the link (6).
(7) rotatably provided on the rear end side via a support shaft (27),
A guide rail (28) having a horizontal U-shaped end face is fixed to the inner surface of the outer side of the machine, and a guide rail (28) is formed by an iron plate having a thickness approximately half that of the load frame (11). 28), and a X-shaped rail groove (29) of the leg frame (4) and a U-shaped rail groove (29) of the guide rail (28).
The guide wheels (26) of the respective links (6) and (7) are rotatably inserted, and the lift table (10) is raised and lowered substantially vertically by swinging of the links (6) and (7). Further, the other end of the support shaft (27) having the guide wheel (26) provided at one end thereof is extended, and the inner surface (30) of the inboard portion of the carrier frame (11) is extended.
The supporting shaft (27) approaches the other end surface, and the weight of the tire (17) supported by the receiving roller (16) generates a deformation force that pushes the loading frame (11) outward. When the support shaft (27) is torsionally deformed by the deformation force, the end surface of the support shaft (27) abuts on the inner surface (30) of the carrier frame (11) to prevent the guide wheel (26) from coming off the rail groove (29). The notch (3) into which the center axis (8) of each of the links (6) and (7) is inserted.
1) is formed on the guide rail (28) to prevent the center shaft (8) from coming into contact with the guide rail (28) when the carrier frame (11) is lowered to the lowest position.

Also, a lift frame (10) is mounted on a bogie frame (5) provided with front and rear wheels (3) and (1) via links (6) and (7) so as to be able to move up and down.
Is raised and lowered by a lift cylinder (22),
In a transport trolley provided with left and right receiving rollers (16) on which a circular load (17) is placed on a bifurcated lift table (10) load place, a link (29) to a rail groove (29) on one side of the lift table (10). 6) The guide wheel (26) at the end is rotatably inserted, and the support shaft (27) of the guide wheel (26) to be fixed to the link (6) is protruded from the side opposite to the rail groove (29). .
Even when a load such as a tire (17) is lifted so as to be sandwiched by the bifurcated lift table (10), even if a deformation force is generated that pushes the left and right lift tables (10) outward, the rail groove (29) and The end surface of the support shaft (27) protruding on the opposite side is brought into contact with the inner surface of the carrier frame (11) of the lift platform (10) to prevent the guide wheel (26) from being detached, and the platform of the lift platform (10). The frame (11) is formed in a simple shape with a downwardly open U-shaped end face, and for example, the load carrier frame (11) of the lift platform (10) is formed at a lower cost and lighter weight than the structure of the downwardly open C-shaped end face. Simplification and weight reduction.

Further, as shown in FIGS. 4, 6, 9, and 10, a square block type oil passage base (32) is fixedly fastened to a back side of the base frame (2) by bolts (33).
An oil tank (34) is fixed to a side surface of the base (32), and a plunger pump (3) is fixed to a lower surface of the base (32).
5), and a lever arm (3) is attached to a fulcrum plate (36) fixed to the base (32) via a fulcrum shaft (37).
8) rotatably support the pumping lever (39)
Is detachably connected to a lever arm (38), and the piston (40) of the plunger pump (35) is connected.
Pressing roll (41) to be brought into contact with lever arm (3)
8). Further, the pressure release shaft (42) on the upper surface of the base (32) is projected from the upper surface of the base frame (2), and the lowering lever (43) is mounted.

Also, a cylinder bracket (44) is fixed to the back side of the base frame (2) to support a support shaft (45).
The lift cylinder (22) is mounted via a cylinder cylinder (47) at one end of the cylinder body (46) of the lift cylinder (22), and the cylinder head (47) is mounted at the other end of the cylinder body (46). 48) is detachably screwed on, and the support shaft (4) is attached to the cylinder base (47).
5) is penetrated and connected to the cylinder bracket (44) so that the cylinder body (46) stands substantially vertically, and the cylinder body (4) is inserted through the cylinder head (48).
6) the lower piston (49) lower end side is inserted into and out of the lower piston (49), and the lower piston (49) is inserted into the upper piston (50) so as to be able to enter and exit.
1) When the upper end of the upper piston (50) is brought into contact with the lower part and fixed thereto, and pressure oil is supplied to the cylinder body (46),
After the upper piston (50) rises, the lower piston (49)
Is raised to raise the lift base (10), while returning the pressurized oil of the cylinder body (46) to the oil tank (34), so that the lower piston (49) is lowered and then the upper piston (50) is lowered. Then, the lift table (50) is lowered.

As shown in FIG. 10, a suction valve (52) connecting the plunger pump (35) and the oil tank (34), and a discharge valve (53) connecting the plunger pump (35) and the lift cylinder (22). ), An ascending load adjusting valve (54), and a sudden drop prevention pressure relief valve (55) for short-circuiting the lift cylinder (22) to the oil tank (34) by operating the lowering lever (43) inside the oil passage base (32). And the cylinder base (4
7) and a hydraulic hose (50) are connected to the oil passage base (32), and the oil passage base (32) is connected to the lift cylinder (22) via the hydraulic hose (56).

Further, as shown in FIGS. 11 and 12, FIG.
The lower piston (49) and the cylinder head (48) are removed, and the cylinder head (57) through which the upper piston (49) is inserted is detachably screwed and fixed to the cylinder body (46). Omit the lift table (1
9) is reduced from that of FIG. 9 and the manufacturing cost and weight are reduced by omitting the lower piston (49). At the time of manufacturing and assembling, the specifications shown in FIG. Can be manufactured by selecting the specification.

A lift frame (10) is mounted on a bogie frame (5) provided with front and rear wheels (3) and (1) via links (6) and (7) so as to be able to move up and down.
The lift cylinder (22) lifts and lowers the cylinder body (46) of the lift cylinder (22) substantially vertically within substantially the vertical width of the carriage frame (5), and the lift cylinder is mounted on the carriage frame (5). By providing the (22), the minimum ground clearance of the lift stand (10) is lowered, and the cylinder body (46) is housed within the vertical width of the bogie frame (5), for example, for removing and attaching the tire (17). Obstacles on the upper surface side of the trolley frame (5) during loading / unloading work can be easily eliminated, and the handling operability and the structure can be simplified.

A large head cylinder head (48) provided with upper and lower pistons (50) and (49) that expand and contract in multiple stages on substantially the same axis, and a small head cylinder head (57) provided with only the upper piston (50). ) With the lift cylinder (2
2) The cylinder body (46) is provided interchangeably with the cylinder body (46) and can be changed only by selecting the cylinder heads (48) and (57) at the maximum height for lifting the load. The vertical width of the bogie frame (5) is reduced and the maximum lift of the lift base (10) is ensured, and the specification of the lift cylinder (22) is changed and the structure is simplified and lightened.

[0020]

As is clear from the above embodiments, the present invention raises and lowers the lift table (10) via the links (6) and (7) to the bogie frame (5) provided with the front and rear wheels (3) and (1). In a transport vehicle that is freely mounted and lifts and lowers the lift table (10) by a lift cylinder (22), a front-rear mounting tool () is provided on the lift table (10) luggage loading section and the rear upper surface of the lift table (10). 19) and (20) are provided, and the push handle (18) is removably attached to the front-standing tool (19) or the rear-standing tool (20). For example, such as removing and attaching a tire (17) of a truck. The loading / unloading operation can be easily performed by removing the push handle (18) serving as an obstacle, and, for example, after the front wheel with one tire (17) or after the pair of tires (17). Hand push hand depending on the size of luggage such as a wheel The mounting position of the handle (18) can be selected from either the middle or the rear of the lift stand (10), and the hand push handle (18) can easily be used as a support frame for easily falling loads such as tires (17). It is possible to easily improve the operability and simplify the structure.

Further, two pairs of front and rear receiving rollers (1 and 2) are provided.
6) is provided on the lift platform (10) on the luggage placing portion, and a front support (19) is provided on the lift platform (10) on the side of the bearing (14) provided between the front and rear receiving rollers (16). By using two front and rear receiving rollers (16), it is possible to simplify the structure of the receiving roller (16) and reduce the weight and cost easily for the same allowable load weight, and The receiving roller (16) can be reduced in diameter by making the receiving roller (16) small, and the erecting tool (19) can be arranged by utilizing the space above the lift table (10) between the front and rear receiving rollers (16). The front stand (19) is provided within the left and right widths without enlarging the left and right widths of the lift stand (10).
0) It is possible to easily achieve the light weight and compactness and the simplification of the structure.

A lift frame (10) is mounted on a bogie frame (5) provided with front and rear wheels (3) and (1) via links (6) and (7) so as to be able to move up and down.
Is raised and lowered by a lift cylinder (22),
In a transport trolley provided with left and right receiving rollers (16) on which a circular load (17) is placed on a bifurcated lift table (10) load place, a link (29) to a rail groove (29) on one side of the lift table (10). 6) The guide wheel (26) at the end is rotatably inserted, and the support shaft (27) of the guide wheel (26) to be fixed to the link (6) is protruded from the side opposite to the rail groove (29). For example, when a load such as a tire (17) is lifted so as to be sandwiched by a fork-shaped lift table (10), even if a deformation force is generated that pushes the left and right lift tables (10) outward, the rail groove (29) is not removed. ), The end face of the support shaft (27) protruding on the opposite side can be brought into contact with the side surface of the lift table (10) to prevent the guide wheel (26) from being detached. It can be formed in a simple shape, and is lighter than the structure of the C-shaped end face facing downward, for example. And it can form the lift stage at low cost (10), in which it is possible to easily achieve such simplification and weight of the structure.

A lift frame (10) is mounted on a bogie frame (5) provided with front and rear wheels (3) and (1) via links (6) and (7) so as to be able to move up and down.
And a lifting cylinder (22) for raising and lowering the carriage frame (5), wherein the cylinder body (46) of the lift cylinder (22) is provided substantially vertically within a substantially vertical width of the carriage frame (5). By providing the lift cylinder (22) to the vehicle, the minimum ground clearance of the lift base (10) can be easily reduced, and the cylinder body (46) is housed within the vertical width of the bogie frame (5), for example, to provide a tire. An obstacle on the upper surface side of the bogie frame (5) when carrying out the loading / unloading work such as the attaching / detaching work of (17) can be easily eliminated, and the handling operability and the structure can be easily simplified. Is what you can do.

Further, a large head cylinder head (48) provided with upper and lower pistons (50) and (49) extending and contracting in multiple stages on substantially the same axis, and a small head cylinder head (57) provided with only the upper piston (50). ) With the lift cylinder (2
The cylinder head (48) is provided interchangeably with the cylinder body (46) of (2) and has a maximum height for lifting the load.
(57) can be changed only by selecting the cylinder body (4).
6) The length of the bogie frame (5) can be easily reduced by shortening the length, and the maximum lift of the lift base (10) can be easily secured. The specification change and structure of the lift cylinder (22) Can be easily simplified and lightened.

[Brief description of the drawings]

FIG. 1 is an overall side view.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view of the same.

FIG. 4 is an enlarged rear side view.

FIG. 5 is an enlarged front side view.

FIG. 6 is an enlarged rear plan view.

FIG. 7 is an enlarged front plan view.

FIG. 8 is an enlarged front view of a lift base.

FIG. 9 is a sectional view of a lift cylinder.

FIG. 10 is a hydraulic circuit diagram.

FIG. 11 is a side view showing a modification of FIG. 1;

FIG. 12 is a side view showing a modification of FIG. 9;

[Explanation of symbols]

 (1) Rear wheel (3) Front wheel (5) Bogie frame (6) (7) Link (10) Lift table (14) Bearing body (16) Receiving roller (18) Hand push handle (19) Standing fixture ( 20) Standing-up tool (22) Lift cylinder (26) Guide wheel (27) Support shaft (29) Rail groove (46) Cylinder body (48) Cylinder head for large lift (49) Lower piston (50) Upper piston ( 57) Cylinder head for small lift

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Akihiro Kodama 1st Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation F-term (reference) 3D050 AA36 BB02 BB25 GG05

Claims (5)

[Claims] 1. A transport vehicle in which a lift platform is mounted on a bogie frame provided with front and rear wheels via links so that the lift platform can be raised and lowered by a lift cylinder.
A transport trolley, wherein front and rear standing tools are provided on the lift table luggage placement section and the upper surface of the rear part of the lift table, and a push handle is detachably attached to the front or rear standing tool. 2. The front and rear two sets of left and right receiving rollers are provided on the lift luggage loading portion, and the front standing tool is fixed to the lift luggage loading portion on the side of the bearing provided between the front and rear receiving rollers. The carrier according to claim 1, wherein: 3. A lift frame is mounted on a bogie frame provided with front and rear wheels via links so as to be able to move up and down, and the lift table is moved up and down by a lift cylinder. In the transport vehicle provided in the luggage loading portion, the guide wheel at the link end is rotatably inserted into the rail groove on one side of the lift table, and the support shaft of the guide wheel fixed to the link is opposite to the rail groove. A transport trolley characterized by being protruded from the trolley. 4. A transport vehicle in which a lift frame is mounted on a bogie frame provided with front and rear wheels via a link so as to be able to move up and down, and the lift table is moved up and down by a lift cylinder.
A transport trolley, wherein a cylinder body of a lift cylinder is provided substantially vertically within a substantially vertical width of the trolley frame. 5. A lift head cylinder head provided with upper and lower pistons extending and contracting in multiple stages on substantially the same axis and a small lift cylinder head provided only with an upper piston are interchangeably provided on the cylinder body of the lift cylinder. The carrier according to claim 4, characterized in that: