JPH02282196A - Load carriage - Google Patents

Abstract

PURPOSE:To facilitate handling of a cargo by forming a cargo holding space by first and second running frames and a traversing frame, and providing a fork possible to protrude being displaced to a side of the cargo holding space in both the running frames. CONSTITUTION:In a converting truck, its right and left running frames 1, 2 are connected by a traversing frame 3 formed by buckling link 3a so as to change their opposed space, and holding space S is formed by the frames 1, 2, 3. The truck, while it changes a direction of running of drive wheels 4 by a motor 11, runs by a motor 7, so that a cargo is stridden by both the running frames 1, 2, and fetches the cargo into the holding space S. Next actuating a cylinder 21 moving down a fork 19 provided in both the frames 1, 2, they are placed approaching by selecting a steering mechanism 13, and the truck inserts the fork 19 below a pallet and lifts by reversely actuating the cylinder 21 the cargo carried. Thus, a grounding pressure by the wheel is generated small, while the cargo can be safety further easily handled.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is a method for transporting a load lifted by a construction lift or the like to a predetermined location on each floor of a construction site such as a medium-to-high-rise building. (Horizontal i! transportation) etc.

<Prior Art> Conventionally, the following means have been employed to transport the above-mentioned loads.

A. First conventional example A forklift is hoisted to each floor, and the lifted load is transported to a predetermined location by the forklift.

B. Load on the second conventional example trolley! 11, the entire truck is lifted up to a specified floor using a construction lift, etc., and after lowering the truck, it is connected to a tow truck that has been lifted up to each floor in advance, and the truck moves the load to the specified location. transport.

<Problems to be Solved by the Invention> However, the above conventional example has the following drawbacks.

a. Disadvantages of the first conventional example In order to increase the loading capacity, the weight of the counterbalance weight must be increased, and along with this,
When loading a load, the ground pressure from the front wheels increases, and a large amount of weight (the weight of the load added to the vehicle weight) is applied locally to the floor, etc., which may cause damage to the floor slab, etc., resulting in safety concerns. There was a drawback that it decreased.

Additionally, when transporting long objects such as reinforcing bars, the running direction is perpendicular to the longitudinal direction of the long object, making it difficult to change direction and poor maneuverability, reducing work efficiency. there were. In particular, at construction sites, lifts that lift loads are often installed using elevator shafts, and there are cases where the entrance to the elevator hall is too narrow to carry the load manually. This has the drawback of further reducing work efficiency and increasing labor costs, making it uneconomical.

b. Disadvantages of the second conventional example: A large amount of manpower is required to unload the cargo on the cart, resulting in high labor costs and an uneconomical disadvantage.

Furthermore, since the trolley is connected to the towing vehicle, the overall length of the vehicle body becomes longer in the running direction, making it difficult to change direction, resulting in poor maneuverability and reduced workability.

The first transport vehicle according to the present invention has been developed in view of the above circumstances, and is designed to avoid the weight of the load to be transported from being locally applied to the floor, and to improve the loading and unloading operations of the load. The second object of the present invention is to make it possible to easily carry out the process with less manpower, and also to make it possible to load, unload and transport long loads even in places with narrow spaces. The purpose of the conveyance truck is to simplify the structure for driving and displacing the forks in the horizontal and vertical directions.

<! ! ! Means for Solving the Problem> In order to achieve the above-mentioned object, a first transport vehicle according to the present invention includes a first traveling frame provided with a plurality of wheels, and at least one wheel. The upper portions of the second running frames are connected to each other by a horizontal frame, and
A load holding space is formed by the second running frame and the horizontal frame, and a fork is provided on each of the first and second running frames so as to be able to project toward the holding space. A drive mechanism for driving and displacing in the horizontal direction and the vertical direction is provided, and the drive mechanism includes a traveling drive mechanism and a steering mechanism.

In order to achieve the above-mentioned object, the second transport vehicle according to the present invention has the following features on each of the first and second traveling frames of the first transport vehicle according to the present invention:
A fork support frame is provided so as to be displaceable in the vertical direction, a fork is provided on the fork support frame so as to be able to protrude into the holding space, and a shift fork is provided on the fork support frame so as to be swingable; and the fork are interlocked and connected,
The fork supporting frame is provided with a stopper that comes into contact with the fork to prevent displacement when the fork protrudes toward the holding space, and the fork is disposed between the shift fork and each of the first and second traveling frames. A drive mechanism is provided to displace the stopper in the horizontal direction and to drive and displace the stopper in the vertical direction after contacting the stopper.

<Function> According to the configuration of the first transport vehicle according to the present invention, the load lifted by a construction lift or the like is traveled so as to be straddled by the first and second traveling frames, and in this state, the fork is horizontally moved. It plunges under the load by driving in the direction, lifts the load by driving in the vertical direction, carries the load while holding it in the holding space, and then transports it to a predetermined location. , the fork can be pulled out and the load can be unloaded by the reverse operation to the above case.

According to the configuration of the second transport vehicle according to the present invention,
By activating the drive mechanism while straddling the load lifted by a construction lift, the fork is driven horizontally until it hits the stopper, plunges under the load, and hits the stone bar. Later, the load can be lifted by being driven in the vertical direction, and the load can be transported while being held within the bubbling space.

<Example> Next, an example of the present invention will be described in detail based on the drawings.

1st Embodiment> FIG. 1 is an overall plan view of a first embodiment of a transport vehicle, FIG. 2 is an overall partially cutaway front view, and FIG. 73 is a partially cutaway overall side view.

In these figures, 1 indicates a first running frame which has a rectangular shape when viewed from the front, and 2 indicates a second running frame which has a rectangular shape when viewed from the front. are connected by a pair of horizontal frames 3.3, and as shown in FIG. 3, a load holding space S is formed in a state surrounded by the first and second traveling frames 1.2 and the horizontal frame 3.3. has been done.

In each of the first and second running frames 2, a drive wheel 4 is provided at one end in the longitudinal direction of the lower part thereof, and
Caster wheels 5 are respectively attached to the other end in the longitudinal direction.

A traveling electric motor 7 capable of forward and reverse driving is provided on the upper part of a wheel boulder 6 that rotatably holds the driving wheel 4, and the traveling electric motor 7 and the driving wheel 4 are connected to a bevel gear type transmission mechanism 8 and a gear type transmission mechanism. It is interlocked and connected via a mechanism 9. This traveling electric motor 7, bevel gear type transmission mechanism 8
and a gear type transmission mechanism 9, and is referred to as a traveling drive mechanism.

The wheel holder 6 is connected to the first and second traveling frames 1.
．． Each of the first and second running frames 1.2 is attached so as to be rotatable only around a vertical axis, and an annular gear 10 is connected to the middle of the wheel holder 6. A gear 12 is provided to be driven by an electric motor 11 that can be driven in reverse, and the gear 12 and the annular gear 10 are engaged with each other.
A steering mechanism 13 is configured to change the direction of travel by the drive wheels 4.4.

Each of said transverse frames 3.3 has a link 3a.

3a connected by a pin 3b, and each end of the link 3a rotates around an axis perpendicular to each of the first and second running frames 1 and 2. At the same time, a fan-shaped gear 14 is attached to each end of the link 3a...
The sector gears 14 on the same side of each of the first and second running frames 1.2 are linked together via a pair of gears 15.15, and the steering mechanism 13 causes the driving wheels 4
As the first and second running frames l and 2 change their orientations to opposite sides and run in that state, both lateral frames 3.3 bend in synchrony, and the first and second running frames 3. The frames 1.2 are configured so that their facing distance can be changed while maintaining a posture in which they are parallel to each other.

Therefore, when lifting and transporting the transport vehicle itself using a construction lift, etc., the first and second traveling frames 1 and 2 are brought close to each other to make the vehicle compact, thereby facilitating lifting and transport. You can also adjust the spacing to suit the size of the load you are trying to transport.

As shown in FIG. 2, each of the synchronizing gears 15 is provided with an electromagnetically operated brake 16, and by operating the brake 16, the links 3a,
The rotation of the first and second traveling frames 1. It is possible to travel while maintaining the two facing intervals at a predetermined distance.

As shown in the partially cutaway side view of the main part in FIG. 4 and the partially cutaway front view of the main part in FIG. is provided so as to be movable up and down via guide rollers 18, and a fork 19, 19 is provided on the lower end side of the fork support frame I7 so as to be movable in the horizontal direction.

An angled shift fork 20 that engages with the fork 19 is attached to the fork support frame 17 so as to be rotatable around a horizontal axis, and first and second shift forks 20 and 20 are attached to the other end of each of the shift forks 20 and 20. A cylinder 2I connected to each of the running frames 1 and 2 is connected, and a fork 19 is brought into contact with the lower end side end of the fork support frame 17 on the side of the holding space S to prevent horizontal displacement. A stopper 22 for moving the fork 17 is attached to constitute a drive mechanism for driving and displacing the fork 17 in the horizontal direction and the vertical direction.

According to this configuration, as the cylinders 21 are driven and shortened, the fork 19 is first displaced until it comes into contact with the stopper 22, protrudes toward the holding space S, and plunges into the lower part of the pallet carrying the load. However, after contacting the stopper 22, the fork support frame 17 is raised and 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 lowermost position, the shift fork 20 is swung in the opposite direction to the upward movement to initialize the fork 19. It is now possible to return to the retirement position if.

The configuration in which the forks 19 are driven and displaced in the horizontal direction and the vertical direction by this single drive mechanism is a characteristic configuration of the second transport vehicle according to the present invention.

The traveling electric motor 7 is installed at a predetermined location on the transport vehicle.
Electric motor 11 for steering, brake 16...
, and a pantry for the cylinder 21 .
... operations can now be performed by remote control.

Instead of the cylinder 21 that constitutes the drive mechanism that drives and displaces the fork 17 in the horizontal and vertical directions, for example, a so-called turnbuckle, in which male-threaded rods are connected by a female-threaded member, may be used. Using an interposed rod, the female screw member is driven and rotated by an electric motor in a forward and reverse direction to expand and contract, and the fork 17 is expanded and contracted by the expansion and contraction.
The structure may be such that it can be driven and displaced horizontally and vertically.

<Second Embodiment> FIG. 6 is a partially cutaway overall plan view showing a second embodiment of the transport vehicle, FIG. 7 is an overall front view, and FIG. 8 is a partially cutaway overall side view.

The differences from the first embodiment are as follows.

That is, the length in the longitudinal direction of the second running frame 2 is configured to be shorter than that of the first running frame l, and the drive wheels 4 are attached to each of the longitudinal ends of the first running frame 1. A pair of caster wheels 5.5 are attached to the running frame 2 of 2. The caster wheel 5 may be one, and the entire structure may be three wheels.

The first and second running frames 1.2 are integrally connected by a rigid transverse frame 3.3. The configuration is such that the facing distance between the two cannot be changed.

Slide frame 3 using both horizontal frames 3, 3 as guides
1.31 is provided movably driven by a cylinder 32, and a fork support frame 17 is provided on each of the slide frames 31, 31 so as to be movable up and down by a cylinder 33, and a fork 19 is provided at the lower end of the fork support frame 17. It is integrally attached and allows the horizontal and vertical movement of the fork 19...
Each of these is configured to be carried out by a dedicated cylinder 32,33.

Each drive wheel 4.4 is constituted by a pair of wheels 4a, 4a, and each of the wheels 4a...
A dedicated electric motor 34 capable of forward and reverse rotation is interlocked and connected via a chain type transmission mechanism 35, thereby forming the steering mechanism 13, and by driving and rotating both axles 4a, 4a in mutually opposite directions, The running direction can be easily changed without the wheels 4a, 4a coming into sliding contact with the floor surface.

3rd Embodiment> FIG. 9 is an overall plan view showing a third embodiment of the transport vehicle, FIG. 1O is an overall front view, and FIG. 11 is an overall side view.

The features of this third embodiment are as follows.

In each of the first and second running frames 1.2, a drive wheel 4 equipped with the same steering mechanism 13 as in the second embodiment is attached to one end in the longitudinal direction, while a drive wheel 4 equipped with the same steering mechanism 13 as in the second embodiment is attached to the other end in the longitudinal direction. A caster wheel 5 having a pair of wheels 5a, 5a is attached.

A fork support frame 17.17 is provided in each of the first and second traveling frames 1.2 so as to be movable up and down by the cylinder 41, and the fork support frame 17... has four parallel links at the lower end of each of the fork support frames 17.17. The fork 19 is provided so as to be movable (while maintaining a horizontal position) via a mechanism 42, and the fork support frame 17 is connected to the parallel quadruple link mechanism 42, respectively, and the fork support frame 17.
- A cylinder 43 is provided across each of the forks, and the fork 19 is driven and displaced in the horizontal direction by the operation of the cylinder 43.

4th Embodiment> FIG. 12 is an overall plan view showing a fourth embodiment of the transport vehicle;
FIG. 13 is an overall front view, and FIG. 14 is an overall side view.

The features of this fourth embodiment are as follows.

A fork interval adjustment frame 51 is attached to the horizontal frames 3, 3 so as to be horizontally displaceable, and a cylinder 52 is interlocked and connected to the fork interval adjustment frame 51 and each of the first and second running frames 1, 2. By operating this cylinder 52, the spacing between the forks 19 can be adjusted depending on the size of the load.

A fork support frame 17.17 is provided in each of the fork spacing adjustment frames 51.51 so as to be movable up and down by a cylinder 53, and a cylinder 54...
・The fork 19 can be driven and displaced in the horizontal direction by...
・ is provided.

The transport vehicle of the present invention can be applied to various uses, such as transporting materials in narrow passages in rack warehouses and factories, and transporting yachts and cruisers at marinas.

<Effects of the Invention> According to the first transport vehicle according to the present invention, the load is held from both sides by the plurality of forks, and the weight of the load is distributed among three or more wheels. The ground pressure caused by the wheels can be reduced, and there is no need to increase the weight of counterbalance weights to increase the loading capacity, and the weight of the load to be transported can be reduced compared to conventional forklifts. The ground pressure is relatively low, and tM damage to floor slabs, etc. caused by increased ground pressure can be avoided, improving safety.

In addition, since even a long object is transported in the same direction as its longitudinal direction, it can be transported as long as it has a width equal to the distance between the first and second traveling frames. It has become easier to maneuver and improves work efficiency.

Furthermore, by driving the fork in the horizontal and vertical directions, it is possible to easily load and unload cargo without requiring human labor, reducing labor costs and improving economic efficiency.

According to the second transport vehicle according to the present invention, the single drive mechanism swings the shift fork and displaces the fork support frame in the vertical direction via the shift fork after contacting the stopper. , it is possible to displace the fork in the horizontal direction and in the vertical direction without providing a dedicated drive mechanism for each, the structure is simple and inexpensive with a small number of members, and it is also possible to displace the fork in the horizontal direction. If the cylinder were to be installed in a horizontal position for this reason, the cylinder would protrude outward from the vehicle body, increasing the width of the vehicle body.However, according to this proposal, the shift fork is driven to swing and move in the vertical direction. All you need to do is provide a mechanism, and overall, the installation space for the drive mechanism has become compact, the width of the entire vehicle body can be reduced, the vehicle can travel well even in narrow spaces, and workability has been improved.

[Brief explanation of drawings]

The drawings show an embodiment of the transport vehicle according to the present invention, and FIG. 1 is an overall plan view of the first embodiment of the transport vehicle, FIG. 2 is an overall front view, FIG. 3 is an overall side view, and FIG. The figure is a partially cutaway side view of the main part of FIG. 3, FIG. 5 is a partially cutaway view taken along the line ■-V in FIG. 4, and FIG. 6 shows a second embodiment of the transport vehicle. FIG. 7 is a partially cutaway overall plan view, FIG. 8 is a partially cutaway overall side view, FIG. 9 is an overall plan view showing the third embodiment of the transport vehicle, and FIG. 1O is an overall front view. 11 is an overall side view, FIG. 12 is an overall plan view showing a fourth embodiment of the transport vehicle, FIG. 13 is an overall front view, and FIG. 14 is an overall side view. 1...First running frame 2...Second running frame 3...Horizontal frame 7...Constituting a running drive mechanism Electric motor for running 8...Constituting a running drive mechanism Hevel gear type transmission mechanism 9...Gear type transmission mechanism 13 configuring the traveling drive mechanism
... Steering mechanism 17 ... Fork support frame 19 ... Fork 20 ... Shift fork 21 ... Cylinder 22 ... Stopper 32 ... Cylinder as a drive mechanism that drives and displaces the fork in the horizontal direction 33...Cylinder 41 as a drive mechanism for driving and displacing the fork in the vertical direction...Cylinder 43 as a drive mechanism for driving and displacing the fork in the vertical direction...Cylinder 43 as a drive mechanism for driving and displacing the fork in the horizontal direction Cylinder 53...Cylinder 54 as a drive mechanism that drives and displaces the fork in the vertical direction...Cylinder S as a drive mechanism that drives and displaces the fork in the horizontal direction...Enveloping space Fig. 5

Claims (2)

[Claims] (1) The upper parts of a first running frame provided with a plurality of wheels and a second running frame provided with at least one wheel are connected to each other by a horizontal frame, and the first and second running frames and the A load holding space is formed by the horizontal frame, and each of the first and second running frames is provided with a fork capable of projecting and displacing toward the holding space, and the fork is driven and displaced in the horizontal direction and the vertical direction. 1. A transport vehicle characterized by being provided with a drive mechanism for moving the vehicle, and further comprising a travel drive mechanism and a steering mechanism. (2) Each of the first and second traveling frames according to claim (1) is provided with a fork support frame that is movable in the vertical direction, and the fork support frame is provided with a fork support frame that protrudes toward the holding space side. and a shift fork is swingably provided on the fork support frame, the shift fork and the fork are interlocked and connected, and when the fork protrudes toward the holding space, the fork abuts against the fork. A stopper for preventing displacement is provided on the fork support frame, and a stopper is provided between the shift fork and each of the first and second traveling frames to displace the fork in the horizontal direction and to move the fork in the vertical direction after abutting against the stopper. A transport vehicle equipped with a drive mechanism that drives and displaces the vehicle.