JP2002178916A - Heavy load conveying truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heavy load conveying truck capable of advancing even if a space below a heavy load such as a caisson is small for reducing installation costs. SOLUTION: A driven truck 5 rollably comprising several wheels 9, 9 on a bottom of a frame 8 and a self-advancing truck comprising a driving wheel 13 rollable on railways 2, 2 and a drive device 14 for driving the wheel 13 on a frame 12 are rotatably and detachably connected. The frames support an elastic fluid pressure bag 20 of a flat bag shape. A bottom of the heavy load 21 can be lifted upward by feeding the bag 20 with pressure fluid for expanding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for lifting a heavy object such as a caisson or a large precast concrete product,
The present invention relates to a heavy goods transport trolley that is moved from a production yard, a stock yard, or the like to a launch platform or the like.

[0002]

2. Description of the Related Art As disclosed in Japanese Unexamined Patent Publication No. Hei 4-100772, a caisson is manufactured on a manufacturing box with a space formed under the caisson. When moving to the platform, a large number of carriers moving on rails enter the space below the caisson, lift the caisson with a hydraulic jack on the carrier, lift it from the production box, and push the caisson from behind. The caisson was moved while being supported by the carrier cart by being pressed by the device.

[0003]

However, in the prior art as described above, in order to cope with the large weight of the caisson, a large number of coil springs are mounted on a movable gantry provided with wheels rolling on rails. The mounting table was supported via the base, and the hydraulic jack was fixed on the mounting table. Therefore, the height of the carriage is relatively high (approximately 1.68 m), so that the space under the caisson is increased (about 2.1 m) so that the carriage can enter, and the height of the manufacturing box is also high. There was a problem that needed to be. In addition, since the transport vehicle itself has no moving means, a means for moving the transport vehicle, such as the above-described pressing device, is required separately from the transport vehicle, which increases the number of parts and increases the cost. There was a problem.

The present invention has been made in view of the situation of the prior art as described above, and is intended to provide a heavy goods transport vehicle that can enter a transport vehicle even if the space under a heavy object such as a caisson is low, and can reduce equipment costs. The purpose is to provide.

[0005]

SUMMARY OF THE INVENTION The features of the present invention for solving the conventional problems as described above and achieving the intended purpose are as follows.
A driven truck having a plurality of wheels rotatably provided at the bottom of a frame, and a self-propelled truck provided with driving wheels rotatable on a track on a frame and a driving device for driving the driving wheels. By freely and detachably connecting, each frame supports an elastic flat bag-shaped fluid pressure bag, and a pressurized fluid is supplied to the inside of the fluid pressure bag to inflate, so that the bottom surface of the heavy object is raised upward. It is possible to push up.

It is preferable that the drive wheel has a flange portion, and the self-propelled vehicle has a rollable driven wheel. The reaction force received by the drive wheel from the track is smaller than the reaction force received by the driven wheel from the track. It is preferable that the drive wheels and the driven wheels are arranged so as to be large, and the wheels provided on the bottom of the frame of the driven truck are preferably formed in a small-diameter roller shape. And an electric motor.

[0007] Further, the follower truck and the self-propelled truck may be freely combined.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a heavy goods transport truck according to the present invention will be described with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a carrier, reference numerals 2 and 2 denote rails, and reference numeral 3 denotes a caisson manufacturing box.

[0010] The manufacturing box 3 is formed with spaces 4, 4 ... in which the carrier 1 is inserted under a heavy object such as a caisson. The ceiling of the space 4 is closed by a form plate 4a which forms a part of the bottom form of the heavy object.

Two rails 2 and 2 are laid on the bottom of the space 4, and the carrier 1 is mounted on the rails 2 and 2.

As shown in FIG. 3, the transport vehicle 1 is composed of one follower vehicle 5 and two self-propelled vehicles 6, 6.
The follower truck 5 and the self-propelled truck 6 are rotatably and detachably connected via a connecting member 7.

The follower truck 5 includes a frame 8 and a frame 8
Are provided with a plurality of wheels 9, 9... The frame 8 is formed in a flat and substantially rectangular parallelepiped shape, and a locking projection 10 constituting the connecting member 7 protrudes from front and rear ends thereof.

The locking projection 10 has a flat plate-shaped tip formed in a circular shape, and a connecting pin hole 11 is formed in the center of the circular shape.

The wheels 9 are formed in a cylindrical shape having a small outer diameter and a wide width, and are mounted on the bottom of the frame 8 via bearings so as to be aligned in front and rear and roll freely in two rows.

The self-propelled carriage 6 includes a frame 12, drive wheels 13, 13, a drive device 14, and driven wheels 15, 15.

An engaged projection 16 is provided at the front end or the rear end of the frame 12. Then, as shown in FIG. 6, the latching projection 10 of the driven truck and the latched projection 16 of the self-propelled truck are overlapped with each other, and the connecting pin 17 is passed therethrough so as to be rotatable and detachable. It is supposed to be.

The driven wheel 15 is formed in a cylindrical shape having a small outer diameter and a larger width than the outer diameter, and is rotatably provided on the bottom of the frame 12 via a bearing.

The driving wheel 13 has flanges 13a on both sides.
Are formed so as to sandwich the rail between the flange portions 13a, and the outer diameter thereof is larger than that of the driven wheel 15.

The driving wheels 13 are arranged closer to the center of the frame 12 than the driven wheels 15, that is, closer to the center of gravity of the bogie, and are adapted to support a larger load than the driven wheels 15. The driving wheel 13 receives a greater reaction force from the rail than the driven wheel 15, and can appropriately transmit the driving force to the rail.

The drive unit 14 is a small high torque reducer 18
And a small high-torque reducer 18 which is directly connected to the drive wheel shaft.
The power of the electric motor 19 is transmitted to the drive wheels 13 via the drive motor 8.

Each of the frames of the driven truck 5 and the self-propelled trucks 6, 6 supports a fluid pressure bag 20, 20,.

The fluid pressure bag 20 is composed of an air bag or the like formed in a rubber flat bag shape, and is disposed so as to entirely cover the upper surface of each frame. A hose for supplying a pressurized fluid, a valve for adjusting a flow rate and the like (both not shown) are independently connected to each fluid pressure bag.

When a pressurized fluid such as compressed air is supplied to the fluid pressure bag 20, it expands as shown in FIGS.
The form plate 4a that forms a part of the heavy-weight bottom form is pushed up.

[0025] A number of transport vehicles 1,
Are moved on the rails 2 and 2 in a state where the fluid pressure bag 20 of each frame is contracted to enter the space 4 below the heavy object 21 such as a caisson. Next, the working fluid is supplied to each of the fluid pressure bags 20, 20,. As a result, the heavy object 21 is lifted by lifting the bottom surface upward by the upper surface of the fluid pressure bag 20, and in this state, by driving the electric motor 19, the drive wheels 13 are driven through the small high-torque reducer 18. The heavy object 21 is moved by being driven.

When the carriage is moved under a heavy object, the height of the carriage is 58 when the fluid pressure bag is contracted.
cm, so that if there is a space with a height of slightly less than 79 cm at the bottom of the heavy object, the carrier can easily enter.

When the fluid pressure bag is inflated to push the bottom surface of the heavy object upward, the elastic pressure bag is deformable, so that even if the bottom surface of the heavy object has irregularities, it can absorb and distribute the load. Becomes even.

[0028] Further, since the driven truck and the driving truck are rotatably connected to each other, it is possible to appropriately travel on the rail.

In the above-described embodiment, the structure in which two self-propelled vehicles are connected before and after one driven vehicle has been described. However, the number of self-propelled vehicles and the number of self-propelled vehicles may be different. Regardless of the composition, they may be freely combined.

In the above-described embodiment, an example in which an electric motor is used as a power source has been described. However, an engine or the like may be used instead.

[0031]

According to the present invention, a self-propelled vehicle having a plurality of wheels rotatably provided at the bottom of a frame, a driving wheel capable of rolling on a track on a frame, and a driving device for driving the driving wheels. By connecting the truck to the cart so as to be rotatable and detachable, each frame supports a flat bag-shaped fluid pressure bag having elasticity, and the fluid pressure bag supplies a pressurized fluid to the inside and inflates the bag. By allowing the bottom surface of the heavy object to be pushed upward, the height of the conveyance vehicle can be reduced, and therefore, even if the space below the heavy object is low, the conveyance vehicle can be inserted. By lowering the production box, the construction cost of the production box can be reduced, and the production work of caisson and the like can be facilitated. Further, when the fluid pressure bag is deformed, even if the bottom surface of the heavy object has unevenness, the load can be absorbed and the load distribution can be made uniform, and it is possible to cope with a heavy object having various shapes. Further, since the driving means is provided on the cart itself, there is no need to use a separate moving means,
The number of parts can be reduced, and equipment costs can be reduced.

Since the drive wheel has the flange portion, the drive wheel can appropriately receive a lateral load and can move without deviating on the track.

The self-propelled truck has a driven wheel that can roll freely.
By arranging the drive wheel and the driven wheel such that the reaction force received by the drive wheel from the track is greater than the reaction force received by the driven wheel from the track, the drive wheel can suitably transmit torque to the track. In addition, by making the driven wheel a simple shape, the cost can be reduced and a heavy object can be favorably supported.

Since the wheels provided on the bottom of the frame of the driven vehicle are formed in a small-diameter roller shape, the height of the transport vehicle can be further reduced, and the load of the heavy object is suitably supported. And installation is easy.

By providing the drive unit with a high-torque reducer and an electric motor, the drive unit can be simplified, equipment costs can be reduced, and the height of the transport vehicle can be made relatively low. it can.

The free combination of the driven truck and the self-propelled truck makes it possible to select a suitable form of the transporting truck according to the shape of the moving heavy object, and to move the heavy object more safely. Can be.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of an embodiment of a heavy object transporting cart according to the present invention.

FIG. 2 is a front view showing the carrier in FIG. 1;

FIG. 3 is a side view showing the transport carriage according to the first embodiment.

FIG. 4 is a front view showing an operation state of the fluid pressure bag in FIG. 2;

FIG. 5 is a side view showing an operation state of the fluid pressure bag in FIG. 3;

FIG. 6 (A) is a side view showing a connecting portion in FIG. 3,
(B) is the same top view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveyance trolley 2 Rail 3 Production box 4 Space 4a Form plate 5 Follower trolley 6 Self-propelled trolley 7 Connecting member 8 Frame (Follower trolley) 9 Wheel 10 Locking projection 11 Connection pin hole 12 Frame (Self-propelled trolley) 13) drive wheel 13a flange 14 drive device 15 driven wheel 16 engaged projection 17 connecting pin 18 small high torque reducer 19 electric motor 20 fluid pressure bag 21 heavy object

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiroshi Ishii 2-2-2 Koraku, Bunkyo-ku, Tokyo Within Goyo Construction Co., Ltd. (72) Inventor Yukio Kisara 1-3-6 Uchisaiwaicho, Chiyoda-ku, Tokyo F-term in Nichetsu Corporation (reference) 3F022 LL12

Claims (6)

[Claims] 1. A self-propelled vehicle having a plurality of wheels rotatably provided on a bottom portion of a frame, a driving wheel capable of rolling on a track on a frame, and a driving device for driving the driving wheels. By connecting the bogie to the truck so as to be rotatable and detachable, and supporting each frame with a flat-bag-shaped fluid pressure bag having elasticity, the fluid pressure bag supplies a pressurized fluid to the inside and expands the bag. A heavy object transport trolley characterized in that a bottom surface of the heavy object can be pushed upward. 2. The heavy object transporting vehicle according to claim 1, wherein the driving wheel has a flange portion. 3. The self-propelled truck has a driven wheel that can roll freely,
3. The heavy object transporting vehicle according to claim 1, wherein the drive wheel and the driven wheel are arranged such that a reaction force received by the drive wheel from the track is greater than a reaction force received by the driven wheel from the track. 4. 4. The heavy object transporting vehicle according to claim 1, wherein wheels provided on the bottom of the frame of the driven vehicle are formed in a small-diameter roller shape. 5. The heavy object transporting vehicle according to claim 1, wherein the driving device includes a high torque reducer and an electric motor. 6. The heavy object transporting vehicle according to claim 1, wherein the driven vehicle and the self-propelled vehicle are freely combined.