JP2002046808A - Stacker crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stacker crane capable of increasing the height and speed thereof by forming a frame body in an integral structure to eliminate the need for adjusting the parallelism of a mast at the time of the assembly at site, reducing the interval between both wheels to prevent a carriage from being deflected, and increasing the rigidity against deflection of the frame body. SOLUTION: Since the frame body 5 is formed in the integral structure, the adjustment of the parallelism thereof at site required for a conventional mast of separate structure is eliminated, and a working efficiency is increased. Since the frame body 5 is formed in the integral structure, the rigidity against deflection in longitudinal direction is increased, and the crane can be increased in height and speed. Since traveling wheels W1 and W2 are unitized and installed on the front and rear side faces of the frame body 5, the maintenance and part replacement can be performed easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacker crane that is installed in an automatic warehouse or a parts warehouse of a factory, etc., and is used for loading and unloading cargo at a predetermined position on a multi-stage cargo rack. Stacker crane with increased rigidity.

[0002]

2. Description of the Related Art As shown in FIG. 5, a conventional stacker crane 01 has a pair of front and rear masts 04 erected on a trolley 03 running in a front and rear direction on a rail 02, and their upper ends are connected to each other. By connecting with the member 05, a vertically long rectangular frame body 06 is formed, and the traveling drive means 07 (motor and the like), the control device 0
In most cases, the loading platform lifting device 09 is mounted, and the loading platform 010 is provided between the two masts 04 so as to be able to move up and down.

[0003]

In the structure of the frame 06 like the conventional stacker crane 01 described above, the bogie 0
3. Since the mast 04 and the connecting member 05 are separate bodies, when assembling the frame body 06 at the construction site, it is troublesome to adjust the parallelism of the two masts 04 and a lot of time is required. I needed it.

When the driving means 07 is mounted on the carriage 03, the distance between the front and rear running wheels W1 and W2 is inevitably increased, and the center of the carriage 03 is bent depending on the weight of the load placed on the bed 010. Therefore, it is necessary to increase the thickness of the carriage 03 to increase its rigidity.

Further, if the frame body 06 is formed by combining a plurality of members, the bending rigidity in the front-rear direction is insufficient, so that the stacker crane 01 is made to have a higher layer and the traveling speed and the acceleration / deceleration speed are increased. There is a problem that it tends to bend in the direction.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. By making the frame an integral structure, it is not necessary to adjust the parallelism of the mast at the time of assembling on site.
It is an object of the present invention to provide a stacker crane in which the distance between the two wheels is reduced to prevent the bogie from bending, and the bending rigidity of the frame body is increased to enable the crane to have a higher layer and a higher speed.

[0007]

In order to achieve the above object, a stacker crane according to the present invention is characterized in that a stacker crane provided on a lower part of a vertically rectangular frame on a rail extending in the front-rear direction laid on a floor surface. In a stacker crane that travels with a pair of traveling wheels and performs loading / unloading of cargo between a loading platform and a side-by-side loading shelf, the frame is formed as an integral structure, and the front and rear traveling wheels are unitized. It is characterized in that it is attached to the front and rear side surfaces of the frame. According to this feature, since the frame has an integral structure, there is no need to adjust the degree of parallelism on site, unlike a conventional mast having a separate structure, thereby improving work efficiency. In addition, since the frame has an integral structure, the bending rigidity in the front-rear direction is increased, so that the crane can have a higher floor and a higher speed. Furthermore, since the traveling wheels are unitized and attached to the front and rear side surfaces of the frame, maintenance and replacement of parts are facilitated.

The stacker crane of the present invention comprises a driving means for driving one of the front and rear traveling wheels, a control device,
It is preferable that the loading platform elevating device is provided at an appropriate position on the front and rear sides of the frame. In this case, the driving means, the control device, and the lifting / lowering device of the carrier are provided on the front and rear side surfaces of the frame, that is, the side surface corresponding to the conventional mast, and therefore, compared with the conventional device provided on the upper surface of the carriage. As a result, the front-rear length of the crane can be shortened and its size can be reduced. In addition, since the distance between the front and rear running wheels can be made shorter than before, the load applied to the lower horizontal rod of the frame is reduced, and the portion does not bend without increasing its rigidity.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a relationship between a stacker crane and a load shelf according to an embodiment of the present invention, FIG. 2 is a front view of the stacker crane of the present invention, and FIG. Partial enlarged view, (b) is (a)
FIG. 4 is a perspective view showing the relationship between the bogie unit and the drive unit.

1 and 2, a stacker crane 1 is shown. The stacker crane 1 is laid on a floor F so as to face the front-rear direction, and is mounted on a rail 3 having a rectangular cross section. Traveling by a pair of front and rear traveling wheels W1 and W2 provided at a lower portion of a vertically elongated rectangular frame 5, and an upper portion of the frame 5 is guided by a ceiling rail 4 attached to a ceiling C, and travels. 6 and a load 7 between the side-by-side load shelves 2
Entry and exit of goods.

More specifically, the frame 5 is composed of masts 5a and 5b, which are composed of left and right vertical members, and upper and lower connecting members 5c and 5d, which are formed by molding, for example. It is configured as an integrated structure that forms a vertically long rectangle.

Further, on the front and rear side surfaces of the lower end of the frame 5, running wheels W1 and W2 and driving means U1 unitized to drive these by an inverter-controlled motor 8 and a speed reducer (not shown) are provided. U2 is attached, and the lower part of the frame 5 is configured as a carriage unit 15.

A loading platform 6 is supported between the masts 5a and 5b by guide rollers 10 arranged vertically so as to be slidable in the vertical direction.

The carrier 6 is taken up by a take-up member 12a of an elevating device 12, guided by sprockets 13 which are pivotally supported at the upper and lower ends of the frame 5, and before and after hanging down from the sprockets 13, 13. It is suspended by ropes 14, 14 a, 14 b such as a pair of chains or wires, and is configured to be able to move up and down by the operation of the elevating device 12.

On the opposite side of the frame 5 on which the lifting device 12 is provided, there is provided a control unit 16 serving as a control device for controlling the driving means U1, U2, the lifting device 12 and the loading / unloading of the carrier 6. I have.

More specifically, the driving means U1 and U2 provided on the front and rear side surfaces of the lower end of the frame 5 have a symmetrical structure, and the mounting plates 18a and 18 are joined to the front and rear of the lower end of the frame 5.
b, the boxes 20a and 20b attached to the boxes 20a and 20b via the flanges 19a and 19b.
Are supported by bearings B1 and B2 through these bearings.
A support shaft 22 for supporting the running wheels W1, W2 between 1 and B2
A speed reducer R which is supported at one end of the support shaft 22 at the extending end and is directly connected to the output shaft of the motor 8;
A box 20 is attached to a side surface of the speed reducer R so as to extend around a support shaft 22 that supports the speed reducer R.
a, Arm 24 Locked to Locking Portion 23 on Side of 20b
And auxiliary wheels 25a, 25b rotatably supported at the lower ends of the boxes 20a, 20b so as to sandwich both side surfaces of the rail 3.

The cart 15 or boxes 20a, 20b
A terminal 28 provided with a plurality of current collecting brushes protrudes from the side surface of the device. A conductive rail 30 for power supply for slidingly contacting the current collecting brush and guiding power and control signals to the control unit 16 is provided in parallel with the rail 3. Has been laid.

The procedure for assembling the stacker crane configured as described above will be described.

First, masts 5a and 5b, which are left and right vertical members, and ends of horizontal upper and lower connecting members 5c and 5d are welded to each other by using a welding jig or the like by using a steel die having a rectangular cross section. The vertically long rectangular frame 5 is integrally formed.

Next, unitized driving means U1 and U2 are attached to the front and rear side surfaces of the lower end of the frame 5, respectively, and the front and rear of the upper end of the frame 5 are provided for guiding the upper end of the frame 5. A sprocket 13, 13 for suspending and supporting the ropes 14, 14a, 14b is mounted on the front and rear of the upper end.

Further, an elevating device 12 is mounted on one side of the lower end of the frame 5 and a control unit 16 is mounted on the other side, and the drive means U1 and U2 are connected to the terminal 28 via the control unit 16 via the control unit 16. The electric wiring is connected to the motor 8, the motor (not shown) of the lifting device 12, the motor of the carrier 6, and the like.

When the temporary assembly of the stacker crane 1 is completed in this way, the traveling wheels W1 and W2 are supported on the rails 3 and the upper supporting rollers at the upper ends are mounted on the ceiling rail 4 attached to the ceiling C. It is erected and held in the hooked state.

Therefore, a loading platform 6 is supported between the masts 5a and 5b via a guide roller 10 so as to be slidable in the vertical direction, and the loading platform 6 is provided with a rope 14, which is wound by a winding member 12a. Sprocket 1 by 14a, 14b
It is suspended and supported via 3, 13.

When the stacker crane 1 is assembled according to the above procedure, the stacker crane 1 is guided by the rails 3 and the ceiling rails 4 so as to be able to run in an upright state, and is arranged side by side with the loading platform 6 according to a command from an external control device. The loading and unloading work of the load 7 is performed between the load shelves 2.

Therefore, since the frame 5 is formed as an integral structure of a vertically long rectangle by welding, it is not necessary to adjust the parallelism at the site, unlike a conventional mast having a separate structure, and the work efficiency is improved. .

Further, since the frame has an integral structure, the bending rigidity in the front-rear direction is increased, so that it is possible to cope with an increase in the number of crane layers and a speed.

Further, the traveling wheels W1 and W2 are unitized to constitute drive means U1 and U2, which are detachably attached to the front and rear side surfaces of the frame 5.
Maintenance and replacement of parts are facilitated.

In addition, since the driving means U1, U2, the control unit 16, and the lifting device 12 of the carrier 6 are provided on the front and rear sides of the frame 5, ie, the side corresponding to the conventional mast, Compared with the crane provided on the upper surface, the front-rear length of the crane is reduced, and the size can be reduced.

With this miniaturization, the front and rear running wheels W1,
Since the interval between W2 can be made shorter than before, the load applied to the horizontal rod at the lower portion of the frame 5 is also reduced, and the portion does not bend without increasing its rigidity.

Although the embodiments of the present invention have been described with reference to the drawings, the specific structure is not limited to these embodiments, and even if there are changes and additions without departing from the gist of the present invention. Included in the invention.

[0031]

The present invention has the following effects.

(A) According to the first aspect of the present invention, since the frame is an integral structure, it is not necessary to adjust the degree of parallelism on site, unlike a conventional mast having a separate structure, and the work efficiency is improved. Is improved. In addition, since the frame has an integral structure, the bending rigidity in the front-rear direction is increased, so that the crane can have a higher floor and a higher speed. Furthermore, since the traveling wheels are unitized and attached to the front and rear side surfaces of the frame, maintenance and replacement of parts are facilitated.

(B) According to the second aspect of the present invention, the driving means, the control device, and the lifting / lowering device of the carrier are provided on the front and rear side surfaces of the frame, that is, the side surface corresponding to the conventional mast. Compared to a conventional truck provided on the upper surface of a truck, the front-rear length of the crane is shortened and the crane can be downsized. In addition, since the distance between the front and rear running wheels can be made shorter than before, the load applied to the lower horizontal rod of the frame is reduced, and the portion does not bend without increasing its rigidity.

[Brief description of the drawings]

FIG. 1 is a front view showing a relationship between a stacker crane and a load shelf according to an embodiment of the present invention.

FIG. 2 is a front view of the stacker crane of the present invention.

FIG. 3A is a partially enlarged view showing a bogie unit of a stacker crane, and FIG. 3B is a sectional view taken along line AA of FIG.

FIG. 4 is a perspective view showing a relationship between a bogie unit and a drive unit.

FIG. 5 is a front view of a conventional stacker crane.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stacker crane 2 Packing shelf 3 Rail 4 Ceiling rail 5a, 5b Mast 5c, 5d Up-down connection member 5 Frame 6 Luggage 7 Load 8 Motor 10 Guide roller 12 Elevating device 12a Winding member 13 Sprocket 14 Cable 15 Cart unit 16 Control Unit 18a, 18b Mounting plate 19a, 19b Flange 20a, 20b Box 22 Support shaft 23 Locking part 24 Arm 25a, 25b Auxiliary wheel 28 Terminal 30 Conductive rail B1, B2 Bearing C Ceiling F Floor R Reduction gear U1, U2 Drive means W1, W2 running wheels

Claims (2)

[Claims] 1. A pair of front and rear traveling wheels provided at a lower portion of a vertically rectangular frame on a rail laid on the floor and facing the front-rear direction. A stacker crane for loading and unloading cargo between the stackers, wherein the frame has an integral structure, and the front and rear traveling wheels are unitized and attached to front and rear side surfaces of the frame. 2. The stacker crane according to claim 1, wherein a drive means for driving one of the front and rear traveling wheels, a control device, and a lifting / lowering device for the carrier are provided at appropriate positions on the front and rear sides of the frame.