JPH0638078Y2 - Side fork carrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a side fork provided with a mast that protrudes upward from a vehicle and is movable in the axial direction of the vehicle, and a fork that can move up and down along the mast. The present invention relates to a transport carrier.

[Prior Art] In a warehouse or the like, in order to store as much material (luggage) as possible, it is common to install a large number of material shelves by minimizing the passage width between material shelves through which a carrier passes. . Therefore, a so-called side fork type vehicle is exclusively used as a transporting vehicle in order to make the passing width between the material shelves as short as possible. The side-fork carrier vehicle is a vehicle that includes a mast that protrudes upward from the vehicle and is movable in the vehicle direction of the vehicle, that is, the width direction of the passage, and a fork that can move up and down along the mast. By moving up and down, you can select the desired shelf in the height direction of the material shelf,
Since the material (luggage) can be taken in and out by moving the mast in the vehicle direction, there is no need to move the vehicle in the aisle width direction at the time of loading and unloading operations. Since it is not necessary to change the direction of the vehicle between the time of unloading and the time of moving along the passage, the passage width can be made extremely short. The fork is moved up and down and the mast is moved by a hydraulic or pneumatic cylinder, which is attached to the transport vehicle.

[Problems to be Solved by the Invention] However, when the side fork carrier vehicle is used, since the fork is moved up and down and the mast is moved by a cylinder system, a large number of valves including a relief valve and the like are used. However, there is a problem that the cost is high because of the need for piping and piping. Moreover, there is also a problem that the operation becomes complicated and difficult because the above-mentioned many valves must be controlled one by one. Further, the cylinder system has a problem in terms of noise, and the pneumatic cylinder has a problem that it is particularly noisy during its operation.

Also, if the mast cannot be moved completely, that is, if the tip of the fork protrudes from the side of the vehicle when the mast is retracted to the side of the vehicle to the maximum extent, then the passage width must be increased. In addition, the material (luggage) cannot be placed on the base of the fork and there is a risk that the material (luggage) will fall, so when the mast is retracted to the maximum vehicle side, the tip of the fork will It is desirable not to project from the side of the vehicle, but in that case a cylinder with a considerably large stroke must be used, and when such a cylinder is attached to the vehicle, the cylinder is located on the rear end side of the fork. Since it will inevitably protrude from the side portion of the cylinder, there is a problem that the width of the passage for the cylinder must be increased.

The present invention has been made in view of the above problems, and it is a first object of the present invention to provide a side fork type carrier which is easy to operate, and which reduces noise and cost.

A second object of the present invention is to provide a side fork type carrier vehicle that can reduce the passage width to about the vehicle width and is excellent in safety.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[Means for Solving the Problem] The outline of a typical one of the inventions disclosed in the present application will be described below.

That is, the first invention is a reversible side fork carrier vehicle that includes a mast that protrudes upward from the vehicle and is movable in the axial direction of the vehicle, and a side fork carrier vehicle that can move up and down along the mast. A mast winding conduction mechanism and a fork winding conduction mechanism that are driven by an electric motor are respectively provided, and the mast is moved in the axle direction of the vehicle by interlocking with the linear movement portion of the mast winding conduction mechanism. The fork is moved up and down along a mast in conjunction with a linear movement part of the fork winding transmission mechanism.

A second aspect of the present invention is such that the tip of the fork does not protrude from a side portion of the vehicle when the mast winding transmission mechanism according to the first aspect is retracted to the vehicle side to the maximum extent. It is designed to be configured.

[Operation] According to the means of the first invention described above, the mast is driven in the axial direction of the vehicle by interlocking with the linearly moving parts of the mast winding transmission mechanism and the fork winding transmission mechanism driven by the reversible electric motor. Since the fork is moved up and down along the mast in conjunction with the linear movement part of the fork winding transmission mechanism, the winding transmission mechanism has a smaller number of parts and more operation than the cylinder type. The number of switches to be operated is reduced, and moreover, the power transmission of the winding transmission mechanism is quieter than the power transmission by the pressure change of the fluid, so that the operation is simplified and the noise and the cost are reduced. Will be achieved.

According to the means of the second invention, when the mast winding transmission mechanism of the first invention is retracted to the vehicle side as much as possible, the tip of the fork is located on the vehicle side. Since it is configured so that it does not protrude from the part, there is nothing that protrudes from both sides of the vehicle when the mast is retracted to the maximum side of the vehicle, and material (luggage) is loaded from the root part of the fork. Due to the effect that it can be placed, the second object of shortening the passage width and improving safety is achieved.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of a side fork type carrier according to the present invention, respectively.

The vehicle 1 shown in each of FIG. 1 and FIG. 2 is a self-propelled vehicle capable of omnidirectional driving and unmanned operation.
It employs that of a self-propelled vehicle as detailed in the specification and drawings of 50830. That is, the drive wheels of the side fork type self-propelled transport vehicle 1 include two front drive wheels 5a and two rear drive wheels 5b which are arranged in pairs on opposite side surfaces of the vehicle. The wheel 5a, 5b is provided with a series of rotating bodies (not shown) around the outer circumference of the wheel 5a, 5b, the rotating body being formed so as to be rotatable around the axis of each rotating body independently of the wheels 5a, 5b. The axis of each rotating body is oblique to the vehicle of the wheel, the ground contact line of the rotating body of the front wheel 5a intersects behind the axle of the front wheel 5a, and that of the rotating body of the rear wheel 5b. The ground contact line is configured to intersect in front of the axle of the rear wheel 5b. The front wheels 5a, 5a and the rear wheels 5b, 5b of the drive wheels configured as described above are the first
As shown in FIG. 2 and FIG. 2, each drive motor arranged on the vehicle body 4 is arranged so that its lower end projects from the cutouts 25, 25, 25, 25 formed in the vehicle body 4. The individual drive motors 30, 30, 30, 30 are respectively connected to 30, 30, 30, 30 and the individual wheels 5a, 5a, 5
Since the rotation speeds and the rotation directions of b and 5b are independently adjusted, the side fork type self-propelled transport vehicle 1 can move freely in any direction (forward / backward movement, forward / backward movement).
Left and right traverse, spin turn, etc.).

A notch is provided on either side of the vehicle body 4 so that the vehicle body 4 has a U-shape when viewed from above the vehicle 1. The width and the length of the notch are set to be larger than the width and the length of the fork 3 so that the fork 3 described later can pass therethrough. A pair of guide rails are provided on the upper surface of the vehicle body 4 along the notches extending in the vehicle direction.
6 and 6 are arranged. Vehicles 7,7,7,7 rotatably supported on the lower end of the mast 2 are mounted on the guide rails 6,6, and the vehicles 7,7,7,7 are mounted on the guide rails 6,6. 6
Is guided in the axle direction by. The mast 2 projects upward from the vehicle 1, and a locking portion 2a is formed at either end of the mast 2 in the vehicle front-rear direction (in FIG. 1, the front end of the vehicle). There is. A mast winding transmission mechanism 40 arranged along the guide rail 6 is arranged laterally of this end portion. The mast winding transmission mechanism 40 includes a reversible constant-speed reversible electric motor 11, a sprocket 10 as a driving wheel driven by the electric motor 11, a sprocket 8 as a driven wheel, and a bearing 9 for axially supporting the sprocket 8. It is composed of a silent chain 12 connecting the sprockets 8 and 10, and the locking portion 2a is locked to a portion where the silent chain 12 is present.

The sprocket 8 of the winding transmission mechanism 40 for the mast,
The axial distance between 10 is the stroke of this mast 2 (mast 2
Is set to be larger than the maximum distance (X) between the maximum protrusion to the outside of the vehicle and the maximum rearward movement toward the vehicle, and the locking portion 2a is locked to the silent chain 12. The position is a part of the silent chain 12 that moves only linearly when the electric motor 11 is rotated by the stroke X required for the mast 2.

Therefore, when the electric motor 11 is rotated by the above-mentioned rotation angle, the silent driving force of the electric motor 11 causes the silent chain 12 to move, but as described above, the mast 2 moves only linearly. Since the mast 2 is engaged with the chain 12 (accordingly) to be linearly moved while being guided by the guide rail 6, the mast 2 is moved in the vehicle direction. Will be The reciprocating movement of the mast 2 in the axle direction is performed by reversing the rotation of the electric motor 11. At the end of the mast 2 corresponding to the cutout side of the vehicle body 4, a mounting portion 3a for mounting a material (luggage) protruding outward from the end and the mounting portion 3a.
A fork 3 composed of a support portion 3b of 3a is arranged, and when the mast 2 is projected to the maximum outside of the vehicle for loading and unloading, the mounting portion of the fork 3 is as usual. Material (luggage) can be placed at the root of 3a, and when the mast 2 is retracted to the maximum side of the vehicle, the tip of the fork 3 does not protrude from the side of the vehicle. There is.

A bracket 17 is formed on the surface of the support portion 3b of the fork 3 facing the mast 2. This bracket 17
Is protruded into the mast 2 by a notch 22 formed in the mast 2, and a plurality of rotatable rollers (not shown) are supported at an intruding portion of the bracket 17 in the mast 2. The roller slides in the mast 2 guided by a guide (not shown) formed along the vertical direction of the mast 2. As shown in FIG. 2, inside the mast 2, a fork winding transmission mechanism 50 is provided behind the bracket 17 and along the vertical direction of the mast 2. The fork-winding transmission mechanism 50 includes a reversible constant-speed reversible electric motor 31, a sprocket 19 as a prime mover driven by the electric motor 31, sprocket 14, 15 as a follower, and the sprocket 14, 15, 19. It is composed of a silent chain 16 for connecting the sprocket, sprocket 18, 18 for changing the direction of the silent chain 16 and giving a tension, and bearings (not shown) for pivotally supporting the sprocket 14, 15, 18, 18, 19. The bracket 17 is fixed to a portion of the silent chain 16 between the sprockets 14 and 15.

The sprocket 14 of the winding transmission mechanism 50 for the fork,
The inter-axis distance between 15 is set to be larger than the stroke Y of the fork 3 (the distance between the case where the fork 3 is raised to the maximum above the vehicle and the case where the fork 3 is lowered below the maximum to the vehicle) Y. The fixed position of the bracket 17 with respect to the silent chain 16 is a portion between the sprockets 14 and 15 of the silent chain 16 that moves only linearly when the electric motor 31 is rotated by the stroke Y required for the fork 3.

Therefore, when the electric motor 31 is rotated by the above-mentioned rotation angle, the silent chain 16 moves due to the rotational driving force of the electric motor 31, but as described above, the fork 3 moves only linearly. Since the fork 3 is locked to the part where
The guide rail 6 in the mast 2 interlocks with (follows) and moves linearly, so that the fork 3 moves up and down along the mast 2. The reciprocating movement of the fork 3 along the mast 2 is performed by reversing the rotation of the electric motor 31, and by raising the fork 3 to the upper side of the vehicle as much as possible, the material of the uppermost shelf can be taken in and out. By lowering it to the bottom of the vehicle as much as possible, the material on the bottom shelf can be taken in and out, respectively.

The reference numerals 13 and 20 denote the mast winding conduction mechanism 40,
The mast wrapping conduction mechanism cover for danger and the fork wrapping conduction mechanism cover provided for the exposed portion of the fork wrapping conduction mechanism 50 are respectively shown, and in order to avoid making the figure complicated, The mast winding transmission mechanism cover 13 is omitted in FIG. 1, and the drive motor 30 is omitted in FIG.

As described above, the side fork type self-propelled transport vehicle 1 is provided with the mast 2 movable in the axial direction of the vehicle and the fork 3 movable up and down along the mast 2, and the mast 2 is driven by the reversible motor 11. Since the fork 3 is moved by the fork winding transmission mechanism 50 driven by the reversible electric motor 31, the mast winding transmission mechanism 40 is used.
The number of parts and the number of switches to be operated are smaller than that of the cylinder type, and the power transmission of the winding transmission mechanisms 40 and 50 is quieter than the power transmission due to the pressure change of the fluid. Simplification, noise, and cost reduction will be achieved.

When the side fork type self-propelled transport vehicle 1 configured as described above is advanced along the passage (in the direction perpendicular to the paper surface in FIG. 2), the mast winding transmission mechanism 40 moves the mast 2 Retreat to the side of vehicle 1 to the maximum,
The mounting portion 3a of the fork 3 as shown by the solid line in FIG.
The vehicle travels with its tip not protruding from the side of the vehicle 1. That is, the vehicle 1 travels without protruding outward from the lateral side portion of the vehicle 1.

In this way, when the side fork type self-propelled transport vehicle 1 is advanced along the passage, nothing is projected from the side portion of the vehicle 1 regardless of the presence or absence of the mounting material. The width can be reduced to the vehicle width of the side-fork type self-propelled transport vehicle 1, and when the material is placed, the material can be completely placed on the vehicle body 4, so the risk of the mast 2 tipping over. The property is also reduced.

On the other hand, when the side-fork type self-propelled transport vehicle 1 reaches a desired place for loading and unloading, the fork winding transmission mechanism 50 moves the fork 3 to a desired material shelf height. Then, the mast wrapping conduction mechanism 40 causes the mast 2 to project to the outside of the vehicle as much as possible, so that loading and unloading are performed.

In this way, when loading and unloading by the side fork type self-propelled transport vehicle 1, the loading portion 3a of the fork 3 is placed.
As described above, the material (luggage) can be placed on the root portion of the, so that there is no fear of dropping the material (luggage) and the safety is improved.

According to the side fork type carrier configured as described above, the following main effects can be obtained.

That is, in the first invention, a mast 2 that projects above the vehicle 1 and is movable in the axial direction of the vehicle 1,
In the side fork type carrier having the fork 3 that can move up and down along the mast 2, a mast winding conduction mechanism 40 and a fork winding conduction mechanism 50 that are driven by the reversible motors 11 and 31 are provided, respectively. The mast 2 is moved in the axial direction of the vehicle 1 by interlocking with the linear movement portion of the mast winding transmission mechanism 40, and is interlocked with the linear movement portion of the fork winding transmission mechanism 50. Since 3 is moved up and down along the mast 2, the winding transmission mechanism 40, 50 has fewer parts and less switches to operate than the cylinder type, and the power transmission of the winding transmission mechanism 40, 50 is reduced. The operation is quieter than the power transmission due to the change in the pressure of the fluid, so that the operation can be simplified and the noise and the cost can be reduced.

Further, in the second invention, when the mast winding transmission mechanism 40 in the first invention is retracted to the vehicle side to the maximum extent, the tip of the fork 3 is located on the vehicle 1 side. Since the mast 2 is configured so as not to project from the portion, nothing is projected from both side portions of the vehicle 1 when the mast 2 is retracted to the vehicle side to the maximum extent, and moreover, the material (luggage) is loaded from the root portion of the fork 3. Due to the effect that it can be placed, the passage width can be shortened and safety can be improved.

Here, the side fork type self-propelled transport vehicle 1 in the above-described embodiment can be arbitrarily moved in any direction (forward and backward movement,
Since it is a left-right traverse, spin turn, etc.),
As shown in FIG. 1, if the passage width Z is made larger than the diameter C of the vehicle 1 at the time of spin-turning, spin-turning on the spot becomes possible, and loading and unloading of the material shelf on the opposite side can be performed without changing the direction. The new effect of being able to do is produced.

In addition, in the above embodiment, the notch is provided on the back side of the mast 2.
23 is formed and the electric motor 31 is pulled out to the back side of the mast 2 via the sprockets 18, 18 to obtain a distance from the lower end of the fork side (front side) end face of the mast 2 which serves as a fulcrum of the overturning moment, and the Although the overturning moment of the mast 2 is cancelled, it is also possible to use the electric motor 31 instead of either one of the bearings that pivotally support the sprocket 14 or 15. In that case, since the clockwise moment with the lower end of the fork side (front side) end surface of the mast 2 as a fulcrum becomes small, a weight or the like is placed on the rear portion of the mast 2 to cancel the overturning moment, and the rear portion side is moved. Must be heavy, but sprockets 18,1
There is an advantage that 8,19 etc. can be eliminated.

Although the invention made by the inventor has been specifically described based on the embodiment, the invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the scope of the invention. Nor.

For example, in the above embodiment, in order to further reduce the noise, the silent chain 12 is used as a means for transmitting the driving force of the reversible motors 11 and 31 of the mast winding transmission mechanism 40 and the fork winding transmission mechanism 50, respectively. Although it is used, it is not limited to the silent chain 12, and a roller chain or the like may be used.

Further, in the above embodiment, the side-fork type self-propelled transport vehicle 1 is arbitrarily movable in any direction (forward / backward, left / right traverse, spin turn, etc.), but at least a vehicle capable of forward / backward movement is possible. Good.

Further, in the above embodiment, the constant speed reversible electric motor is used as the electric motor of the mast winding conduction mechanism 40 and the fork winding conduction mechanism 50, but it is also possible to use a variable reversible drive electric motor. is there.

Further, although the side fork type self-propelled transport vehicle 1 in the above embodiment is a vehicle capable of unmanned operation, it goes without saying that the present invention can also be applied to a manned vehicle.

[Effects of the Invention] The effects obtained by the typical one of the inventions disclosed in the present application will be briefly described as follows.

That is, according to the first aspect of the invention, in a side fork carrier vehicle including a mast that protrudes upward from the vehicle and is movable in the axial direction of the vehicle, and a fork that can move up and down along the mast, the vehicle is driven by a reversible electric motor. Each of the mast winding conduction mechanism and the fork winding conduction mechanism is provided, and the mast is moved in the axial direction of the vehicle by interlocking with the linear movement portion of the mast winding conduction mechanism. Since the fork is moved up and down along the mast by interlocking with the linear movement part of the winding transmission mechanism, the number of parts and the number of switches to be operated are reduced compared to the cylinder type, and moreover, due to the change in fluid pressure. Quiet compared to power transmission. As a result, it is possible to simplify the operation and reduce noise and cost.

In the second invention, the tip of the fork does not protrude from the side portion of the vehicle when the mast winding conduction mechanism in the first invention is retracted to the vehicle side to the maximum extent. With this configuration, when the mast is retracted to the maximum side of the vehicle, nothing protrudes from both sides of the vehicle, and material (luggage) can be placed from the root of the fork. become. As a result, the passage width can be shortened and safety can be improved.

[Brief description of drawings]

1 is a top view of an embodiment of a side fork type carrier according to the present invention, and FIG. 2 is a sectional view taken along the line AA in FIG. 1 …… Side fork type transport vehicle 2 …… Mast 3 ……
Fork, 11,31 …… Reversible electric motor, 12,16 …… Chain,
40: Winding conduction mechanism for mast, 50 ... Winding conduction mechanism for fork.

Claims (3)

[Scope of utility model registration request] 1. A side-fork carrier vehicle having a mast that protrudes upward from the vehicle and is movable in the axial direction of the vehicle, and a fork that can move up and down along the mast, for a mast driven by a reversible electric motor. A winding conduction mechanism and a winding conduction mechanism for forks are provided,
The mast is moved in the axial direction of the vehicle by interlocking with the linear movement part of the mast winding conduction mechanism, and the fork is moved to the mast in conjunction with the linear movement part of the fork winding conduction mechanism. A side fork type carrier that is characterized by being moved up and down along the line. 2. The mast winding transmission mechanism is configured such that the tip of the fork does not protrude from the side portion of the vehicle when the mast is retracted to the maximum side of the vehicle. The side fork type carrier according to claim 1 of the utility model registration claim. 3. A side fork type carrier according to claim 1 or 2, wherein the vehicle is capable of traveling in all directions.