JPH08282807A - Stacker crane for automatic warehouse - Google Patents

Abstract

PURPOSE: To avoid making dead space and prevent a stacker crane from being made in a large size by providing a sheave for running a wire. CONSTITUTION: A first and a second wires 13a and 13b for hanging down an elevating frame 12 are respectively run from the inside to the outside of a first and second masts 2 and 3 by a first and a second sheaves 14 and 18 at the top end of the first and second masts 2 and 3. The second wire 13b is further run in the direction of the first mast 2 by a third sheave 19 and run downwards along the outside the first mast 2 by a fourth sheave 15, while te first and the second wires 13a and 13b are wound around a winding drum 11. Because the first and the second wires 13a and 13b are respectively run from the inside to the outside of the first and the second mast 2 and 3 at the top end thereof, the first and the second sheaves 14 and 18 can be arranged outside of the elevating passage of the elevating frame 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacker crane for an automatic warehouse, and more particularly to handling a wire for raising and lowering a lifting frame for transferring loads.

[0002]

2. Description of the Related Art In recent years, automated warehouses have come into widespread use due to the consolidation of distribution bases for the purpose of improving distribution costs and distribution efficiency, and the widespread use of small-lot production of a wide variety of products as user needs diversify. . In an automatic warehouse, a stacker crane as shown in FIG. 4 is used for loading and unloading luggage on a warehouse rack. The traveling body 1 of the stacker crane has a rectangular frame structure including two upright masts 2 and 3 and a lower frame 4 and an upper frame 5 that horizontally connect the lower and upper parts of these masts, respectively. The lower frame 4 of the traveling main body 1 is provided with traveling wheels (not shown) driven by the traveling device 6, and the traveling wheels ride on the lower rails 7 arranged on the floor. On the other hand, the upper frame 5 is provided with a guide roller 9 slidably engaged with an upper guide rail 8 arranged immediately above the lower rail 7. Traveling device 6
By driving, the traveling body 1 travels horizontally along the lower rail 7 and the upper guide rail 8.

Further, the traveling main body 1 is provided with an elevating frame 12 for elevating the luggage along the masts 2 and 3. Wires 13a and 13b are wound around the drum 11 connected to the lifting motor 10,
Is fixed to the mast 2 side end of the elevating frame 12 via a sheave 14 attached to the upper frame 5, while the wire 13b is a mast of the elevating frame 12 via sheaves 15 and 16 attached to the upper frame 5. It is fixed to the end on the 3 side. By driving the lifting motor 10 to rotate the drum 11, the wires 13a and 13
The elevating frame 12 ascends and descends via b. The elevating frame 12 has a slide fork 17 for transferring a load on a warehouse rack.

The luggage carried into the carry-in section of the automatic warehouse is placed on the elevating frame 12 of the traveling body 1 and the traveling device 6
By the horizontal movement of the traveling main body 1 by the above and the vertical movement of the elevating frame 12 by the elevating motor 10, it is transported to the corresponding position of the warehouse rack and is transferred to the warehouse rack by using the slide fork 17.

[0005]

However, the sheave 16 for routing the wire 13b to the mast 3 side has a traveling main body rather than the mast 3 so that the wire 13b can reach the elevating frame 12 vertically along the mast 3. It is provided on the inner side of 1, i.e., in the elevating passage of the elevating frame 12.
Therefore, when the elevating frame 12 is raised to the uppermost stage, the load placed on the elevating frame 12 does not move to the sheave 1.
It is necessary to increase the height of the stacker crane and raise the position of the sheave 16 so as not to interfere with 6, and there is a problem that a dead space is generated by the height increase.

The present invention has been made in order to solve the above problems, and it is possible to prevent a dead space from occurring by installing a sheave for arranging a wire and prevent an increase in size. The purpose is to provide a stacker crane.

[0007]

A stacker crane for an automatic warehouse according to the present invention is a stacker crane for an automatic warehouse in which an elevating frame moves up and down between first and second masts which are upright in parallel with each other. First and second suspension of the lifting frame inside the first and second masts
Wire, a first sheave for folding the first wire at the upper end of the first mast from the inside of the first mast to the outside and routing it downward, and the second wire for the second mast. A second sheave for routing from the inner side to the outer side of the second mast at the upper end, and a second wire once routed to the outer side of the second mast by the second sheave, in the direction of the first mast. A third sheave for routing to and a second wire routed in the direction of the first mast by the third sheave downward along the outside of the first mast at the upper end of the first mast. And a winding drum for winding the first and second wires wound downward by the first and fourth sheaves, respectively.

[0008]

In the present invention, the first and second wires for suspending the elevating frame are provided with the first and second sheaves at the upper ends of the first and second masts, respectively.
The mast is routed from the inside to the outside. The second wire is further routed by the third sheave in the direction of the first mast, and is routed downward along the outside of the first mast by the fourth sheave. In this way, the first and second wires are wound on the winding drum. Since the first and second wires are routed from the inside to the outside of the mast at the upper ends of the first and second masts, respectively,
These first and second sheaves can be arranged outside the ascending / descending path of the ascending / descending frame, and can be placed on the ascending / descending frame when the ascending / descending frame is raised to the uppermost stage without forming a dead space. It is possible to avoid the interference between the loaded luggage and the first sheave or the second sheave.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2 show an automatic warehouse stacker crane according to an embodiment of the present invention. The stacker crane has a traveling main body 1 that horizontally travels along a lower rail 7 disposed on the floor and an upper guide rail 8 disposed directly above the lower rail 7. Running body 1
Has a rectangular frame structure composed of first and second masts 2 and 3 which are upright in parallel with each other, and a lower frame 4 and an upper frame 5 which horizontally connect the lower and upper parts of these masts, respectively. The lower frame 4 of the traveling main body 1 is provided with traveling wheels (not shown) driven by the traveling device 6, and these traveling wheels ride on the lower rail 7. On the other hand, the upper frame 5 has an upper guide rail 8
A guide roller 9 is provided which is slidably engaged with the guide roller 9.

Further, the traveling main body 1 is provided with a vertically movable frame 12 for vertically moving the luggage along the first and second masts 2 and 3. A winding drum 11 connected to the lifting motor 10 is provided on the lower outside of the first mast 2, and the winding drum 11 is provided with a first winding drum 11.
Also, one ends of the second wires 13a and 13b are wound and fixed. These first and second wires 13a
, 13b have the other ends of the first and second masts 2 respectively.
And 3 are fixed to the elevating frame 12 inside, and the elevating frame 12 is suspended by this.

At the upper end of the first mast 2, a first wire 13a fixed to the end of the elevating frame 12 on the first mast 2 side is folded back from the inside of the first mast 2 to the outside. A first sheave 14 is provided for winding around the winding drum 11.

On the other hand, at the upper end of the second mast 3, a second wire 13b fixed to the end of the elevating frame 12 on the second mast 3 side is taken from the inside of the second mast 3 to the outside. A second sheave 18 for turning is provided, and a second sheave 18
In the vicinity of the sheave 18 of the second wire 13, the second wire 13 once laid out to the outside of the second mast 3 by the second sheave 18.
A third sheave 19 is provided around which b is folded back in the direction of the first mast 2. A second wire 13a, which is routed in the direction of the first mast 2 by the third sheave 19, is wound around the upper end of the first mast 2 along the outside of the first mast 2. A fourth sheave 15 is provided for routing to the take-up drum 11.

The elevating frame 12 has a slide fork 17 for transferring a load on a warehouse rack.

Next, the operation of this embodiment will be described. Luggage carried into the carry-in section of the automated warehouse is the traveling main unit 1
It is placed on the elevating frame 12 and is transported to the corresponding warehouse rack position by the horizontal movement of the traveling body 1 by the traveling device 6. Here, when the elevating motor 10 is driven to rotate the winding drum 11, the first wire 13a is wound via the first sheave 14 and the second wire 13b is rotated as shown in FIG. Second, third and fourth
The hoisting frame 12, which is wound around the sheaves 18, 19 and 15 of each of the first and second wires 13a and 13b, is lifted between the first and second masts 2 and 3. Go up and down along the aisle. When the elevating frame 12 is moved up and down to the height of the corresponding warehouse rack in this way, the load on the elevating frame 12 is transferred to the warehouse rack by the slide fork 17.

As clearly shown in FIG. 2, the first and second sheaves 14 and 18 provided at the upper ends of the first and second masts 2 and 3 respectively include the first and second sheaves. Wires 13a and 13b are routed from the inner side to the outer side of the first and second masts 2 and 3, so that the wires 13a and 13b enter the hoisting passage of the hoisting frame 12 formed between the first and second masts 2 and 3. Without being placed outside the hoistway. For this reason, even when the lifting frame 12 is lifted to the uppermost stage, the load placed on the lifting frame 12 is the first
And does not interfere with the second sheaves 14 and 18.
Therefore, it is not necessary to form an extra dead space in the upper portion of the traveling body 1 as in the conventional case, and it is possible to prevent the stacker crane from increasing in size.

[0016]

As described above, the stacker crane for an automatic warehouse according to the present invention is a stacker crane for an automatic warehouse in which the elevating frame moves up and down between the first and second masts standing upright in parallel with each other. First and second wires for suspending the lifting frame inside the first and second masts, respectively, and the first wire is folded back from the inside of the first mast to the outside at the upper end of the first mast. A first sheave for routing the second wire, a second sheave for routing the second wire from the inside of the second mast to the outside at the upper end of the second mast, and the second sheave for the first time. A second sheave for routing a second wire routed to the outside of the second mast in the direction of the first mast, and a second sheath routed in the direction of the first mast by the third sheave. Wire of the first mast A fourth sheave for Torimawasu downward at the upper end along the outside of the first mast, the first and fourth
And a winding drum for winding the first and second wires wound downward by the respective sheaves, so that the first and second sheaves are moved up and down at the upper ends of the first and second masts. It can be placed outside the hoistway of the frame, and even if an extra dead space is not formed, when the hoisting frame is lifted to the uppermost stage, the load placed on the hoisting frame will be the first sheave or It does not interfere with the second sheave, and it is possible to prevent the stacker crane from increasing in size.

[Brief description of drawings]

FIG. 1 is a perspective view showing a structure of an automatic warehouse stacker crane according to an embodiment of the present invention.

FIG. 2 is a front view showing a stacker crane for an automated warehouse according to the embodiment of FIG.

FIG. 3 is a conceptual diagram showing a wire handling method in the embodiment of FIG.

FIG. 4 is a perspective view showing the structure of a conventional automatic warehouse stacker crane.

[Explanation of symbols]

 1 traveling main body 2 first mast 3 second mast 10 lifting motor 11 winding drum 12 lifting frame 13a first wire 13b second wire 14 first sheave 15 fourth sheave 18 second sheave 19 second 3 sheaves

Claims (1)

[Claims] 1. A stacker crane for an automated warehouse, wherein an elevating frame moves up and down between first and second masts standing upright parallel to each other, wherein the elevating frame is suspended inside the first and second masts, respectively. First and second wires, a first sheave for folding the first wire from the inside of the first mast to the outside and routing it downward at the upper end of the first mast, and the second wire for the first sheave. The second sheave for routing from the inner side to the outer side of the second mast at the upper end of the second mast, and the second wire once routed to the outer side of the second mast by the second sheave. A third sheave for routing in the direction of the mast, and a second wire routed in the direction of the first mast by the third sheave outside the first mast at the upper end of the first mast. A fourth for routing downwards along Over Bed and, first and fourth of the first and second automated warehouse stacker crane, characterized in that a winding drum for winding a wire which Torimawasa downward respectively by sheaves.