JPH05246277A - Transport truck - Google Patents

Abstract

PURPOSE:To provide a transport truck able to transport tall cargoes in addition to long cargoes, to simplify the structure, and to change the width of the truck with simple structures so as that it can be made compact in storage and it can be fitted to the size of cargoes in transportation to transport the cargoes stably. CONSTITUTION:Respective upper portions of rear side ends of a first running frame 1 of narrow in width and long in longitudinal direction of a body provided with wheels 4, 5 and a second running frame 2 of narrow in width and long in longitudinal direction of the body provided with wheels 4, 5 are connected to each other with a transversal frame 3 so as to form a U-shaped space S in plan view, and forks 14 are provided on the first and the second running frame 1, 2 respectively so as to be vertically displaceable. And a vertically driving mechanism is provided to displace the forks 14 vertically, and the transversal frame 3 is constructed telescopically movable so as to be able to change the width of the body by the use of driving wheels.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention conveys a load lifted by a construction lift or the like to a predetermined location on the floor of each floor of a construction site such as a middle and high-rise building, that is, so-called horizontal transportation. The present invention relates to a carrier truck used for.

[0002]

2. Description of the Related Art Conventionally, for carrying loads as described above, a forklift is lifted on each floor, and the lifted load is transported to a predetermined location by a forklift, or on a truck. There was one that lifted the load to a predetermined floor in the loaded state, lowered the trolley, and connected it to the tow truck that was previously lifted on each floor, and then towed the load to a predetermined location. ..

However, in the former case, in order to increase the loading capacity, the weight of the counterbalance weight must be increased, and accordingly, when the load is loaded, the ground contact pressure by the front wheels increases, and the load on the floor is increased. On the other hand, a large weight, which is the weight of the vehicle plus the weight of the load, is locally applied,
However, there is a drawback that the safety is deteriorated because the floor slab may be damaged.

Further, when a long object such as a reinforcing bar is to be conveyed, the traveling direction is orthogonal to the longitudinal direction of the long object, so that it is difficult to change the direction and the maneuverability is poor and the workability is deteriorated. There was a drawback to Especially 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 the labor cost becomes high, which is uneconomical.

On the other hand, in the case of using the latter towing vehicle,
It requires a lot of manpower when unloading the trolley, which results in high labor costs and is uneconomical. Further, since the trolley is connected to the towing vehicle, the entire length of the vehicle body becomes long in the traveling direction, it is difficult to change the direction, the maneuverability is poor, and the workability is deteriorated.

Therefore, the present inventors first connected the first traveling frame and the second traveling frame, which are parallel to each other, by a horizontal frame, and connect the first traveling frame and the second traveling frame to each other. Forms a space for wrapping a load in the first and second
Of each of the traveling frames, a fork provided with a fork that can be driven into and out of the hugging space side and that can be driven and displaced in the vertical direction has been proposed (JP-A-2-2821).
96).

Thus, the load is held from both sides by the plurality of forks, the weight of the load is distributed to three or more wheels, and the ground contact pressure due to the wheels is reduced. In order to avoid damage to the floor slab, etc. to improve safety, and even for long items,
It can be transported in the same direction as its longitudinal direction, and can travel as long as there is a width corresponding to the interval where the first traveling frame and the second traveling frame face each other, and the maneuvering can be facilitated and the workability can be improved. I am trying.

[0008]

However, in the above-mentioned transport carriage, the left and right traveling frames are connected by the pair of front and rear lateral frames, which is suitable for transporting a long product long in the front-rear direction of the vehicle body. , A load that is short in the front-rear direction of the vehicle but has a height cannot be transported because the horizontal frame interferes, and there is still room for improvement.

The present invention has been made in view of such circumstances, and the invention according to claim 1 is not limited to a long object which is long in the front-rear direction of the vehicle body, but is short but high in the front-rear direction of the vehicle body. In addition to improving the versatility by allowing good transport of heavy loads, the structure can be simplified and the width of the vehicle body can be changed with a simple structure.
The object of the present invention is to keep the left and right traveling frames in a parallel posture while the object is to be compact when stored and to be able to be transported in a stable state according to the size of a load when transported. It is an object of the present invention to further simplify the configuration for changing the lateral width of the vehicle body.

[0010]

In order to achieve the above-mentioned object, a carrier vehicle according to a first aspect of the present invention is a first traveling vehicle having a plurality of wheels, which is narrow and long in the longitudinal direction of the vehicle body. In a state where a U-shaped space is formed in a plan view between the frame and the upper portions of the second traveling frames, which have at least one wheel and are narrow and long in the vehicle front-rear direction, on the rear end side in the vehicle front-rear direction. The first and second traveling frames are connected to each other by a horizontal frame, and a fork is provided on each of the first and second traveling frames so that the fork can be displaced in the vertical direction, and a vertical drive mechanism for driving and displacing the fork in the vertical direction is provided to expand and contract the horizontal frame. , At least one of the wheels is configured as a drive wheel, and the drive wheel is changed into a running posture that rotates in the longitudinal direction of the vehicle body and a posture in which the driving wheel rotates in the lateral direction of the vehicle body Constitute provided in the function.

According to a second aspect of the present invention, in order to achieve the above-mentioned objects, the horizontal frame of the first aspect is provided with a first horizontal frame and a second horizontal frame provided on the first traveling frame side. The second horizontal frame provided on the traveling frame side is slidably expandable and contractable, and the fixing position is changeable.

[0012]

According to the configuration of the carrier vehicle of the invention according to claim 1, the load lifted by the construction lift or the like travels so as to straddle the first and second traveling frames, and enters the U-shaped space. By positioning the load and changing the direction of the drive wheels to a direction orthogonal to the longitudinal direction of the first and second traveling frames and traveling, the first and second traveling frames of the first and second traveling frames are adjusted to match the size of the load. Adjusting the facing interval, thrusting the fork under the load, and driving up and down to lift the load, transport the load while holding it in the U-shaped space, and then transport it to a predetermined location. With this, the fork can be extracted and the load can be unloaded by the operation reverse to the above case.

In addition, the carrier truck itself can be carried to the site,
When transporting for storing or the like, the first traveling is performed by changing the direction of the drive wheels to a direction orthogonal to the longitudinal direction of the first and second traveling frames as in the case described above. The frame and the second traveling frame can be brought close to each other and can be conveyed in a compact size.

According to the structure of the carrier vehicle of the invention as claimed in claim 2, the first and second lateral frames slide as the vehicle travels by the drive wheels in the state orthogonal to the longitudinal direction of the vehicle body. It is possible to adjust the facing interval and fix them at a predetermined interval while maintaining the first and second traveling frames in a posture parallel to each other.

[0015]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is an overall side view of the carrier vehicle, FIG. 2 is an overall plan view, and FIG. 3 is an overall rear view. In these figures, 1 is a first traveling frame and 2 is a second traveling frame. Shown respectively, first and second traveling frames 1, 2
The upper portions of the rear ends of the vehicle body in the front-rear direction have a U-shaped space in plan view, and the horizontal frame 3
The long objects that are long in the front-rear direction of the vehicle body and the objects that are short in the front-rear direction of the vehicle but have a height are configured to be properly transported.

In each of the first and second traveling frames 1 and 2, a drive wheel 4 is attached to a lower end of the vehicle body in the front-rear direction and a caster wheel 5 is attached to a front end of the vehicle in the front-rear direction.

The drive wheel 4 is rotatably held by a wheel holder 6 as shown in the enlarged sectional view of FIG.
A recess 7 for accommodating a motor is formed in a hub portion of the motor, and a motor support case 8 is attached to and supported by the wheel holder 6 so as to be located in the recess 7. Is provided, and the traveling electric motor 9 and the drive wheels 4 are interlockingly connected via a gear type speed reduction mechanism 10.

A support shaft 11 integral with the wheel holder 6 is rotatably attached to each of the first and second traveling frames 1 and 2 about an axis in the vertical direction.
The upper end of the vehicle and a steering electric motor 12 capable of rotating in the normal and reverse directions are interlocked via a gear type transmission mechanism 13 to change the traveling direction of the vehicle body and to rotate in the vehicle body front-rear direction and in the vehicle body left-right direction. It is configured so that the posture can be changed to a width-shifting posture.

As shown in the sectional views of FIGS. 5 and 6, the horizontal frame 3 has a rectangular tubular first horizontal frame 3a integrally attached to the first traveling frame 1 and a cylindrical shaft thereof. The second lateral frame 3b having a rectangular tubular shape is externally fitted so as to be capable of expanding and contracting by sliding in the core direction, and the driving wheels 4 are changed to a width-shifting posture that rotates in the left-right direction of the vehicle body and are driven, It is configured so that the facing distance between the first and second traveling frames 1 and 2 can be changed.

With this structure, when the carrier truck itself is hoisted and transported by a construction lift or the like, or when it is stored, the first and second traveling frames 1 and 2 are brought close to each other to be compact. Can be easily lifted and transported, and the fork 14 described later can be used depending on the size of the load such as material to be transported.
... can be sufficiently inserted into the lower part of the load, and a stable conveyance state can be obtained.

Further, in the first horizontal frame 3a, the lock pin 15 is arranged so as to be able to move in and out in the direction orthogonal to the axial direction of the cylinder.
And the lock holes 16 are formed in the second horizontal frame 3b at predetermined intervals such as a pitch of 10 cm in the cylinder axis direction, and are provided in the first horizontal frame 3a. The lock cylinder 17 and the lock pin 15 are interlockingly connected via the bell crank 18,
The first and second traveling frames 1 and 2 are configured to be fixed in a state in which the facing interval is adjusted to a predetermined interval.

The second traveling frame 2 is provided on the second horizontal frame 3a so as to be rotatable around an axis in the vehicle left-right direction, and as shown in the overall schematic perspective view of FIG. When the drive wheels 4 and the caster wheels 5 step on cables, reinforcing bars and the like while traveling relatively inclining the first traveling frame 1 and the second traveling frame 2, the first traveling frame 1 and the second traveling frame 2 Are individually rotated to get over and prevent the vehicle body from inclining greatly, so that the vehicle can travel in a stable state, and it is possible to prevent a large impact force from being applied to the load being conveyed.

As shown in the partially omitted side view of FIG. 8 and the rear view of the main part of FIG. 9, each of the first and second traveling frames 1 and 2 is provided with an elevating guide in front and rear vertical frame portions thereof. On the other hand, roller support frames 21a, 21b are provided at both longitudinal ends of a fork support frame 20 provided with two forks 14, 14 at a predetermined interval in the vehicle front-rear direction. Guide rollers 22 attached to 21a and 21b are provided so as to act on the elevating guide 19.

Chains 23a and 23b are connected to the upper ends of the roller supporting frames 21a and 21b, and both chains 23
A and 23b are wound around the guide sheaves 24 along the frame and are connected to one main chain 25.

The intermediate frame 26 of each of the first and second traveling frames 1 and 2 is provided with an electric lifting / lowering power cylinder 27, as shown in the plan view of the main part of FIG. 10, and its movable rod. Guide sheaves 29, 29 are provided at the tip of 28, and an intermediate guide sheave 30 is provided at one end side of the intermediate frame 26 so that the main chain 25 moves from the intermediate guide sheave 30 to the guide sheaves 29, 29.
It is wound around 29, and the tip of the main chain 25 is connected and fixed to the intermediate frame 26.

With this structure, by extending and contracting the movable rod 28, both longitudinal ends of the fork support frame 20 are suspended and pulled to raise the forks 14 and 14, while the main chain 25 and the chains 23a and 2 are pulled up.
3b is loosened and the forks 14 and 14
The vertical drive mechanism is configured to lower the.

A slack detecting device 31 is provided so as to act on the middle of each of the chains 23a and 23b. In the slack detecting device 31, a roller 33 is attached to the tip of the rotating arm 32, and the rotating arm 32 is urged by a spring (not shown) so as to be constantly displaced to the working side. On the base end side of the chain 23
A limit switch 34 is provided so as to operate when a and 23b are loosened and the rotating arm 32 is rotated.

As the rotating arm 32 acts on the limit switch 34, the elevating power cylinder 27 is stopped, and the forks 14, 14 are lowered when descending.
Immediately when the fork collides with another object,
It is configured so that the descent of 14 is stopped to prevent the placed load from being accidentally discharged and dropped.

As shown in the rear view of the main part of FIG. 11, the partially cutaway plan view of the main part of FIG. 12, and the schematic plan view of FIG. 13 for explaining the operation, the fork support frame 20 has a roller support frame 21a. , 21b are provided slidably in the left-right direction of the vehicle body, and a movable body 36 is provided in the fork support frame 20 so as to be movable in the vehicle front-rear direction by a fork retracting power cylinder 35.

A first guide sheave 37a is provided on the space S side of the fork supporting frame 20 on the rear end side in the vehicle front-rear direction, and a second guide sheave 37b is provided on the opposite side, while a space on the front end side in the vehicle front-rear direction is provided. A third guide sheave 37c is provided on the S side, and a fourth guide sheave 37d is provided on the opposite side.

A first chain 38 having one end connected to the space S side of the roller support frame 21a on the rear side in the vehicle front-rear direction.
a is wound around the first guide sheave 37a, passes through the moving body 36, and is wound around the fourth guide sheave 37d, and its tip is the space S of the roller support frame 21b on the front side in the vehicle front-rear direction. It is connected to the far side.

In addition, a second end of which one end is connected to a side farther from the space S of the roller support frame 21a on the rear side in the vehicle front-rear direction.
The chain 38b is wound around the second guide sheave 37b, and the tip of the chain 38b is connected to the moving body 36.
The third chain 38c connected to the space S side of 1b is the third
Is wound around the guide sheave 37c, and its tip is connected to the moving body 36.

With the above structure, the fork support frame 2 is moved by drivingly displacing the moving body 36 in the longitudinal direction of the vehicle body.
A horizontal drive mechanism is configured so that 0 can be displaced in the left-right direction of the vehicle body and the forks 14, 14 can move in and out of the space S.

According to the present invention, the forks 14 ... Are not moved in and out of the first and second traveling frames 1, 2.
By providing the first and second traveling frames 1 and 2 in a fixed state and moving the driving wheels 4 in the width-shifting posture to move the facing distance between the first and second traveling frames 1 and 2 closer to each other, It is also possible to let the forks 14 ...

Further, according to the present invention, the horizontal frame 3 may be configured to be expandable / contractible in a pantograph format.

[0037]

According to the carrier truck of the invention of claim 1, the load is held by the plurality of forks so that the load is held from both sides, and the weight of the load is distributed to three or more wheels. It is possible to reduce the ground pressure due to, and it is not necessary to increase the weight of the counterbalance weight in order to increase the loading capacity, and it is possible to avoid damage to the floor slab etc. due to the increase in ground pressure and improve safety. Even though it is a transport cart that can be transported, even a long object that is long in the front-rear direction of the vehicle body is transported and travels in the same direction as the longitudinal direction of the vehicle, so that only the distance between the first traveling frame and the second traveling frame faces each other. As long as the width of the vehicle is sufficient, the vehicle can run, the maneuverability can be improved, and the workability can be improved. Letter sky Be conveyed by interleaved within, it can now improve versatility.

Moreover, since the first traveling frame and the second traveling frame are connected by one horizontal frame, the construction can be simplified.

Moreover, by changing the facing distance of the first and second traveling frames, the facing distance of the forks provided on them can be adjusted to the width of the load to be transported, so that the width is small. Even a heavy load can be carried in a stable state without being put on the tip of a fork and can be carried well.

Further, not only the distance between the forks but also the facing distance between the first and second traveling frames is changed,
The carrier truck can be made compact, which is extremely convenient when transporting or storing the carrier truck itself.

Furthermore, since the driving force of the driving wheels is used to change the distance between the first and second traveling frames, it is not necessary to provide a separate dedicated one such as a cylinder, and the structure is simplified. This makes it cheaper and makes the entire vehicle lighter.

According to the carrier of the invention according to claim 2,
For example, in the case of expanding and contracting the horizontal frame in a pantograph format, it is difficult to move the first and second traveling frames while keeping them in parallel with each other due to the expansion and contraction. The configuration for changing the lateral width of the vehicle body in the state can be further simplified.

[Brief description of drawings]

FIG. 1 is an overall side view of a carrier vehicle.

FIG. 2 is an overall plan view.

FIG. 3 is an overall rear view.

FIG. 4 is an enlarged sectional view of a drive wheel.

5 is a cross-sectional view taken along the line AA of FIG.

6 is a sectional view taken along line BB of FIG.

FIG. 7 is an overall schematic perspective view.

FIG. 8 is an overall side view with a part omitted.

FIG. 9 is a rear view of the main part.

10 is a cross-sectional view taken along line CC of FIG.

FIG. 11 is a rear view of the main part.

FIG. 12 is a partially cutaway plan view of a main part.

FIG. 13 is a schematic plan view for explaining the operation.

[Explanation of symbols]

 1 ... 1st running frame 2 ... 2nd running frame 3 ... horizontal frame 3a ... 1st horizontal frame 3b ... 2nd horizontal frame 4 ... drive wheel 5 ... caster wheel 14 ... fork 27 ... lifting power cylinder S ... U-shaped space

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takayoshi Higashifuji 4-chome, Honmachi, Chuo-ku, Osaka 13-13 Takenaka Corporation Osaka Main Store (72) Inventor Yoshinobu Kawasaki 4-chome, Honmachi, Chuo-ku, Osaka No. 13 Stock Company Takenaka Corporation Osaka Main Store (72) Inventor Ichiyoshi Nakanishi 4-1-1 Hommachi, Chuo-ku, Osaka City Stock Company Takenaka Corporation Osaka Main Store (72) Inventor Kiyoshi Miyashita Chuo-ku, Osaka City Incorporated Takenaka Corporation, Osaka Main Store, 4-13-1 Honmachi (72) Inventor Kimio Kikuchi 2-5-14, Minamisuna, Koto-ku, Tokyo Incorporated Takenaka Corporation, Research Institute (72) Inventor, Kyoko Shibata Interview 3-18, Mokudo, Mihara-cho, Minamikawachi-gun, Osaka Prefecture Takenaka Corporation Technical Research Institute, Osaka Branch (72) Inventor Shigeru Okano 1-1, Kanda-Ogawamachi, Chiyoda-ku, Tokyo Address: Ishikawajima Transport Co., Ltd. (72) Inventor Tatsuo Tokumasu 1-1, Kandaogawa-cho, Chiyoda-ku, Tokyo Within Ishikawajima Transporter Co., Ltd. (72) Kaku Shinobu 1-1, Kanda-Ogawamachi, Chiyoda-ku, Tokyo Within Transportation Co., Ltd.

Claims (2)

[Claims] 1. A vehicle body of a first traveling frame having a plurality of wheels, which is narrow and long in the longitudinal direction of the vehicle body, and a second traveling frame having at least one wheel, which is narrow and long in the longitudinal direction of the vehicle body. The upper parts on the rear end side in the front-rear direction are connected by a horizontal frame in a state where a U-shaped space is formed in a plan view, and a fork is provided on each of the first and second traveling frames so as to be vertically displaceable. At the same time, an up-down drive mechanism for driving the fork in the up-down direction is provided, the lateral frame is configured to be extendable and retractable, and at least one wheel among the wheels is configured as a drive wheel, and the drive wheel is used in the front-rear direction A carriage that is provided so that the posture can be changed between a running posture that rotates in one direction and a width-shifting posture that rotates in the lateral direction of the vehicle body. 2. The horizontal frame according to claim 1, wherein a first horizontal frame provided on the first traveling frame side and a second horizontal frame provided on the second traveling frame side are slidable and expandable. In addition, the carrier is configured so that the fixed position can be changed.