JP2731417B2 - Transport trolley - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention conveys a load lifted by a construction lift or the like to a predetermined location on a floor of each floor in a construction site of a middle-high-rise building or the like. The present invention relates to a transport vehicle used for (horizontal transport) and the like.

<Prior Art> Conventionally, the following means have been employed for carrying loads as described above.

A. First Conventional Example A forklift is lifted on each floor, and the lifted load is transported to a predetermined location by the forklift.

B. Second conventional example With a load loaded on a trolley, lift the entire trolley to a predetermined floor using a construction lift, lower the trolley, and connect it to a tow truck that has been previously lifted on each floor. Then, the load is conveyed to a predetermined location by the towing travel.

<Problems to be solved by the invention> However, the above-described conventional example has the following disadvantages.

a. Disadvantages of the first conventional example In order to increase the loading capacity, the weight of the counterbalance weight must be increased, and accordingly, when loading the load, the contact pressure by the front wheels increases, and the load on the floor or the like increases. On the other hand, there is a drawback that safety is reduced, for example, a large weight obtained by adding the weight of the load to the vehicle body weight is locally applied, which may cause damage to a floor slab or the like.

Also, when trying to transport a long object such as a reinforcing bar, the traveling direction is orthogonal to the longitudinal direction of the long object,
There was a drawback that it was difficult to change the direction, the maneuverability was poor, and the workability was reduced. In particular, at construction sites, lifts for lifting loads are often installed using elevator shafts, and there are cases where the entrance to the elevator hall is too narrow to be transported. Inevitably, the workability is further reduced, and labor costs are increased, resulting in uneconomical drawbacks.

b. Disadvantages of the second conventional example There is a disadvantage that a large amount of manpower is required when unloading the load on the bogie, resulting in high labor cost and uneconomical.

Further, since the bogie is connected to the towing vehicle, the entire length of the vehicle body becomes longer in the running direction, and it is difficult to change the direction, and the maneuverability is poor and the workability is reduced.

The present invention has been made in view of such circumstances, and it is possible to avoid the weight of a load to be transported from being locally applied to a floor, and to easily load and unload a load with a small number of people. To be able to
Further, it is an object of the present invention to load and unload a long load even in a narrow space, and to further simplify a structure for driving and displacing a fork in a horizontal direction and a vertical direction.

<Means for Solving the Problems> In order to achieve the above-described object, a transport vehicle according to the present invention includes a first traveling frame having a plurality of wheels and a first traveling frame having at least one wheel. The upper portions of the two traveling frames are connected to each other by a lateral frame, and the first and second traveling frames and the lateral frame form a space for holding a load, and the first and second traveling frames respectively include: A fork supporting frame is provided so as to be displaceable in the vertical direction, and a fork is provided on the fork supporting frame so as to be protrudingly displaceable toward the holding space,
Also, a shift fork is provided on the fork support frame so as to be swingable, and the shift fork and the fork are interlocked and connected, and a stopper for preventing displacement by abutting when the fork projects to the holding space side is provided. A drive mechanism provided on the fork support frame, and between the shift fork and each of the first and second traveling frames, the fork is displaced in a horizontal direction, and is driven and displaced in a vertical direction after being brought into contact with the stopper. And a drive mechanism for driving and a steering mechanism.

<Operation> According to the configuration of the transport vehicle according to the present invention, the load lifted by a construction lift or the like travels across the first and second traveling frames so as to drive the fork in the horizontal direction. While moving, it rushes under the load and lifts the load by driving up and down,
Carry the load while holding it in the embracing space, and
Along with the transportation to the predetermined location, the fork can be extracted and the load can be unloaded by the reverse operation of the above case.

In addition, by operating the drive mechanism while straddling the load lifted by a construction lift, the fork is driven to move horizontally until it comes into contact with the stopper, plunges under the load, and hits the stopper. After the contact, the load can be driven up and down to lift the load, and the load can be transported while being held in the holding space.

<Example> Next, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an overall plan view of an embodiment of a transport vehicle, FIG. 2 is a partially cutout front view, and FIG. 3 is a partially cutout entire side view.

In these figures, reference numeral 1 denotes a first traveling frame having a rectangular shape in a front view, 2 denotes a second traveling frame having a rectangular shape in a front view, and upper portions of the first and second traveling frames 1 and 2 are connected to each other. Are connected by a pair of horizontal frames 3,3,
As shown in FIG. 3, the first and second traveling frames 1,
A load holding space S is formed in a state surrounded by the horizontal frames 2 and 3.

In each of the first and second traveling frames 1 and 2, a drive wheel 4 is attached to one lower end in the longitudinal direction, and a caster wheel 5 is attached to the other end in the longitudinal direction.

An electric motor 7 for traveling is provided on the upper part of a wheel holder 6 for rotatably holding the driving wheel 4. The electric motor 7 for traveling can be driven forward and reverse. The electric motor 7 for traveling and the driving wheel 4 are connected to a bevel gear type transmission mechanism 8 and a gear type transmission. It is interlocked and connected via a mechanism 9. The traveling electric motor 7 and the bevel gear type transmission mechanism 8
And a structure including the gear type transmission mechanism 9 and is referred to as a traveling drive mechanism.

The wheel holder 6 includes first and second traveling frames.
A ring gear is attached to each of the wheel holders 1 and 2 so that it can rotate only around a vertical axis.
10 are connected, while the first and second running frames 1,
Each of the gears 12 is provided with a gear 12 that can be driven by an electric motor 11 that can be driven forward and reverse.
The steering mechanism 13 is configured to change the traveling direction of the drive wheels 4, 4 by forward and reverse rotation of the gear 12.

Each of the horizontal frames 3, 3 has a link 3a, 3a with a pin 3b.
Are connected to the first and second traveling frames 1 and 2 so as to be rotatable around their respective vertical axes, and the links 3a. ... a sector gear 14 is attached to each end, and the first and second traveling frames 1,
2 Each of the sector gears 14 on the same side is a pair of gears 15,
15, the steering mechanism 13 changes the direction of the drive wheels 4 to the side where the first and second traveling frames 1 and 2 are opposed to each other. 3 is refracted in synchronization and the first and second traveling frames 1 and 2 maintain their parallel orientation,
It is configured such that the facing distance can be changed.

Therefore, when lifting and transporting the transport vehicle itself using a construction lift or the like, the first and second traveling frames 1 and 2 are brought close to each other to make them compact, and lifting and transporting are performed easily. The distance can be adjusted according to the size of the load to be transported.

As shown in FIG. 2, an electromagnetically operated brake 16 is attached to each of the tuning gears 15.
By operating the links 16, the rotation of the links 3 a is prevented, and the vehicle can travel with the facing distance between the first and second traveling frames 1, 2 maintained at a predetermined distance, for example, during transportation of a load. It has become.

As shown in a partially cutaway side view of a main part of FIG. 4 and a partially cutaway front view of a main part of FIG. 5, fork support frames 17 are respectively provided on the first and second traveling frames 1 and 2. Is provided so as to be able to ascend and descend via guide rollers 18.
Forks 19, 19 are provided at the lower end of the fork support frame 17 so as to be displaceable in the horizontal direction.

An angle-shaped shift fork 20 that engages with the fork 19 is rotatably mounted on the fork support frame 17 around a horizontal axis.
0First and second running frames
The cylinder 21 connected to each of the fork support frames 17 is connected to the holding space S on the lower end side of the fork support frame 17.
A stopper 22 that abuts the fork 19 to prevent displacement in the horizontal direction is attached to the side end, and a driving mechanism that drives and displaces the fork 17 in the horizontal and vertical directions is configured.

According to this configuration, as the driving of the cylinders 21 is shortened, first, the fork 19 is displaced and protrudes toward the holding space S until it comes into contact with the stopper 22, and then protrudes into the lower part of the pallet on which the load is mounted. After contacting the stopper 22,
The fork support frame 17 is raised so that the load can be lifted. On the other hand, as the cylinders 21 are driven and extended, the fork support frame 17 is lowered, and after reaching the lowest position, the shift fork
When the fork 19 is swung in the opposite direction to the upward movement, the fork 19 can be returned to the initial retired position.

That is, a series of operations for drivingly displacing the forks 19 in the horizontal and vertical directions can be performed by one driving mechanism.

At a predetermined position of the carriage, a battery for the traveling electric motor 7, the steering electric motor 11, the brakes 16, and the cylinders 21 is mounted, and a control device having a receiving antenna is provided. The running, steering, and operation of the forks 19 can be performed by remote control.

Instead of the above-described cylinders 21 that constitute a driving mechanism that drives and displaces the fork 17 in the horizontal direction and the vertical direction,
For example, using a rod having a so-called turnbuckle in which rods each having an external thread are connected by an internal thread member, the internal thread member is driven and rotated by an electric motor so as to be able to rotate forward and reverse, and expands and contracts. The fork 17 may be configured to be able to be driven and displaced in the horizontal and vertical directions.

The transport trolley of the present invention can be applied to various uses such as transporting materials in a narrow passageway in a rack warehouse or a factory or transporting a yacht or a cruiser in a marina.

<Effect of the Invention> According to the transport cart according to the present invention, the load is held by both sides by a plurality of forks, and the weight of the load is distributed to three or more wheels. It is possible to reduce the pressure, and it is not necessary to increase the weight of the counterbalance weight to increase the loading capacity, and the ground pressure is small compared to the weight of the load to be transported, resulting from the increase in the ground pressure Thus, it is possible to avoid damage to the floor slab and the like, thereby improving safety.

In addition, even a long object can be traveled as long as the first travel frame and the second travel frame have a width corresponding to the distance between the first travel frame and the second travel frame, because the transport travels in the same direction as the longitudinal direction of the long travel object. Maneuverability has been improved and workability has been improved.

In addition, by moving the fork in the horizontal and vertical directions, the loading and unloading of the load can be easily performed without the need for manual labor, so that labor costs can be reduced and economy can be improved.

Moreover, since the shift fork is swung by one drive mechanism and the fork support frame is vertically displaced via the shift fork after coming into contact with the stopper, the horizontal displacement and the vertical displacement of the fork are reduced. Can be performed without providing a dedicated drive mechanism for each, the number of members is small, the configuration can be simplified, and the cost is low.In addition, if the cylinder is to be provided in a horizontal position to displace the fork in the horizontal direction, the cylinder However, according to the present invention, a drive mechanism may be provided so as to swing the shift fork to be displaced in the vertical direction. The installation space became compact, the overall width of the car body could be reduced, the vehicle could travel well even in narrow places, and the workability was improved.

[Brief description of the drawings]

The drawings show an embodiment of the carrier according to the present invention. FIG. 1 is an overall plan view of the embodiment of the carrier, FIG. 2 is an overall front view, FIG. 3 is an overall side view, and FIG. 3 is a partially cutaway side view of a main part of FIG. 3, and FIG. 5 is a partially cutaway view taken along line VV of FIG. DESCRIPTION OF SYMBOLS 1 ... 1st travel frame 2 ... 2nd travel frame 3 ... Horizontal frame 7 ... Travel electric motor which comprises a drive mechanism for driving 8 ... Bevel gear type transmission mechanism which comprises a drive mechanism for travel 9 … Gear type transmission mechanism that constitutes the drive mechanism for traveling 13… Steering mechanism 17… Fork support frame 19… Fork 20… Shift fork 21… Cylinder 22… Stopper S… Hugging space

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Yoshinobu Kawasaki 4-1-1-13 Honcho, Chuo-ku, Osaka-shi, Osaka Inside the Takenaka Corporation Osaka Main Store (72) Inventor Kiyoshi Miyashita 4 Honcho, Chuo-ku, Osaka-shi, Osaka No. 1-113, Takenaka Corporation, Osaka Main Store (72) Inventor Yasuyuki Shiita 4-1-1-13, Honcho, Chuo-ku, Osaka-shi, Osaka Inside, Takenaka Corporation Osaka Main Store (72) Inventor, Kazu Nakanishi Yoshi 4-1-1-13, Honcho, Chuo-ku, Osaka-shi, Osaka Takenaka Corporation Osaka Main Store (72) Inventor Kimio Kikuchi 3-1-1, Mokudori, Mihara-cho, Minamikawachi-gun, Osaka Technical Research Institute of Takenaka Corporation (72) Inventor Shigeru Okano 1-1-1 Kanda Ogawacho, Chiyoda-ku, Tokyo Inside Ishikawajima Transport Co., Ltd. Ichikawajima Transport Co., Ltd. (72) Inventor Tatsuo Tokumasu 1-1-1 Kandaogawacho, Chiyoda-ku, Tokyo Ishikawajima Transport Co., Ltd. (56) References JP-A-53-98684 (JP) JP-A-56-17825 (JP, A) JP-B-41-12366 (JP, B1)

Claims (1)

(57) [Claims] 1. A first traveling frame having a plurality of wheels and an upper portion of a second traveling frame having at least one wheel are connected to each other by a lateral frame, and the first and second traveling frames are connected to each other. And the horizontal frame form a space for holding the load, and a fork support frame is provided on each of the first and second traveling frames so as to be vertically displaceable. Is provided with a fork so that it can protrude
Also, a shift fork is provided on the fork support frame so as to be swingable, and the shift fork and the fork are interlocked and connected, and a stopper for preventing displacement by abutting when the fork projects to the holding space side is provided. A drive mechanism provided on the fork support frame, between the shift fork and each of the first and second traveling frames, for displacing the fork in a horizontal direction and drivingly displacing in a vertical direction after coming into contact with the stopper; And a transport trolley comprising a traveling drive mechanism and a steering mechanism.