JPH08324713A - Cage elevating device for stacker crane - Google Patents

Abstract

PURPOSE: To enable a worker to lower a cage by hand safely, by turning a handle after releasing the brake device of a brake device-equipped driving motor. CONSTITUTION: This cage elevating device is provided with a lower wheel 33 fitted onto the lower part of a stacker crane 13, an upper wheel 34 fitted onto its upper part, and a cage driving wire 38 which is provided in an endless form including a cage 21 for worker. If the cage 21 for worker is impossible to elevate through a driving motor 35 equipped with a brake device 37, a worker who posts himself on the ground side releases the brake device 37 by changing a brake releasing lever from an operative condition to an inoperative condition. By turning a handle 49, the lower wheel 33 is rotated to lower the cage 21 for worker by hand safely, thus permitting a worker in the cage 21 for worker to be lowered immediately.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cage lifting device for a stacker crane.

[0002]

2. Description of the Related Art The following are known as conventional automatic warehouses. That is, it has a rack device having a large number of article storage shelves vertically and horizontally, and a stacker crane provided in front of the rack device so as to be movable left and right. An elevating table that is movable up and down on a mast provided on the carriage, and an article transfer device (for example, a slide fork that is slidably provided in the front-rear direction) provided on the elevating table,
A cage for workers that can be raised and lowered along the mast,
It is known to have a cage lifting device including a drive motor and the like. In the above, when an article on the lifting platform causes a load collapse, the traveling carriage and the lifting platform stop in an emergency, and when the stop position of the lifting platform at the time of the emergency stop is other than the lowest position, the worker is It was designed to move to the height position of the lifting platform by riding on the cage and then transfer to the lifting platform to perform the predetermined work. Further, even when the elevator is stopped above the mast due to a failure or the like, the worker must move to the elevator to perform maintenance and inspection in the same manner as described above.

[0003]

Disadvantages of the Prior Art The conventional cage lifting device has the following drawbacks. That is, while riding on the worker's cage and performing the predetermined work by reaching the elevator, a power failure or failure in the drive motor with the brake device occurs, and the worker cage can be moved up and down by the drive motor with the brake device. When it disappeared, the worker had the drawback that he could not return to the ground until the trouble was resolved.

[0004]

[Means for Solving the Disadvantages] The present invention employs the following means in order to eliminate the above disadvantages. The present invention
A cage for workers that can be raised and lowered along the mast,
Upper and lower wheels rotatably provided in the upper and lower parts, a cage drive rope that is endless including a cage for workers and hung on the upper and lower wheels, a drive motor with a brake device that drives the lower wheel, and a brake device It has a brake releasing means and a handle for rotating the lower wheel.

[0005]

The present invention has the following functions. Even if the operator's cage cannot be moved up and down by the drive motor with the brake device, the operator on the ground can safely lower the operator's cage manually by rotating the handle after releasing the brake device. Then, the worker in the worker cage can be immediately lowered to the ground.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments with reference to the drawings. In this Embodiment 1, the front means the lower side of FIG. 1, the rear means the upper side of FIG. 1, the left means the left side of FIG. 1, and the right means the right side of FIG.

A pair of front and rear rack devices 1 are erected on the floor so as to open the stacker crane passage 10. The rack device 1 includes a large number of front columns 2 arranged at right and left at predetermined intervals, rear columns 2 arranged at predetermined intervals behind the front columns 2 and front and rear columns 2. And a plurality of article support members 4 provided at predetermined intervals in the height direction, and the article storage shelves 3 are formed by a pair of left and right article support members 4 that face each other without the support columns 2.
Is configured. A fork passage gap 5 is provided between the pair of left and right article support members 4 to allow a slide fork 17 to be described later to move in the vertical direction. The access ports 6 of the article storage shelves 3 of the front and rear rack devices 1 face each other.

On the left side of the rack device 1, there is provided a loading / unloading roller conveyor 8 whose carrying direction is left and right. The rack device 1 for the loading / unloading roller conveyor 8
A known article elevator (not shown) is provided on the side.
This article elevator includes a lift table that can be raised and lowered by a known lift device below the rollers of the loading / unloading roller conveyor 8,
The elevator table is provided upright and has a pair of bearing frames located between the rollers of the loading / unloading roller conveyor 8. The article elevator lifts the article W by the support frame to form a fork insertion gap between the transport surface of the loading / unloading roller conveyor 8 and the lower surface of the article W, or the slide fork 1 by the support frame at the raised position.
The article W is received from the article 7 and then descends to have the function of lowering the article W on the loading / unloading roller conveyor 8.

A pair of upper and lower guide rails 11 are arranged in the stacker crane passage 10 so that the longitudinal direction thereof is oriented in the left-right direction, and the stacker crane 13 is guided by these guide rails 11 so as to be movable left and right. , This stacker crane 13 has a traveling carriage 14
And a pair of left and right masts 1 provided on the traveling carriage 14.
5, the lift 16 that can be lifted and lowered, and the lift 16
And a slide fork 17 which is horizontally slidable in the front-rear direction by a well-known advance / retreat mechanism. As is well known, the slide fork 17 pulls the article W into the elevating table 16 by performing an operation of projecting the article W downward, lifting the article W by raising the elevating table 16 and retreating to the elevating table 16 side. The article W can be unloaded onto the article storage shelf 3 or the like by the reverse operation.

A worker's cage 21 having an opening / closing door 22 is provided on the one mast 15 so as to be movable up and down. The worker cage 21 is lifted and lowered by a cage lifting device 31 described in detail below.

The cage lifting device 31 will be described below. The cage elevating device 31 basically includes a lower wheel 33 that is rotatably provided at a lower portion of the stacker crane 13 so that an axis of the stacker crane 13 is oriented in the front-rear direction, as will be described later, and the stacker crane 13. An upper wheel 34, which is rotatably provided on an upper part with its axis centered in the front-rear direction, is hung on the lower wheel 33 and the upper wheel 34, and is endless including the worker cage 21. It has a cage drive rope 38 composed of a chain, a wire rope, and the like.

The lower wheel 33 is a worm speed reducer 4.
It is configured to be driven by a drive motor 35 with a brake device 37 that can rotate in the normal and reverse directions via the motor 3. The drive motor 35 with the brake device 37 and the worm speed reducer 43 are provided below the stacker crane 13. The brake device 37 is of a type that is in a non-operating state (“OFF” state) by an electromagnet or the like when energized and is in an operating state (“ON” state) by a spring or the like when not energized. The brake device 37 is provided with a brake release lever 57 (brake release means within the scope of the claims) so as to be horizontally swingable, and the brake device 3 is operated by horizontally swinging the brake release lever 57.
The brake shoe 7 (not shown) can be changed from the operating state to the non-operating state. That is, the brake release lever 57
Is usually in a position where the brake shoe is not inactivated, and is operated only when the brake shoe is desired to be inactivated.

The worm 46 of the worm reducer 43
Is connected to the rotary shaft 36 of the drive motor 35 with the brake device 37, and the worm wheel 44 meshing with the worm 46 is fitted to the output shaft 45 rotatably provided in the casing 48. , The lower wheel 33 on the portion protruding rearward from the casing 48.
Is stopped.

The side of the rotary shaft 36 opposite to the input shaft 47 is
It is exposed from the casing of the drive motor 35 with the brake device 37, and a square shaft 36a is formed at this exposed end.
Then, the rotation shaft 50 of the handle 49 rotates on the support frame 52 provided on the drive motor 35 with the brake device 37 so as to face the angular shaft 36a, that is, so as to be coaxial with the rotation shaft 36. The shaft 36 is provided so as to be close to and away from the shaft 36. And, the rotary shaft 50 has an angular shaft 36
A socket 51 that fits in a is provided so as to face the square shaft 36a. With such a configuration, after the brake device 37 of the drive motor 35 with the brake device 37 is inactivated, the lower wheel 33 is rotated by rotating the handle 49 with the socket 51 fitted in the square shaft 36a. The worker cage 21 can be raised and lowered. In addition, I would like to draw your attention here.
Since the worm wheel 44 meshes with the worm 46, that is, the self-locking function of the worm reducer 43 prevents the load of the worker cage 21 from being applied to the handle 49 as a force for rotating the handle 49. Is. Incidentally, when the handle 49 is not operated, the socket 51 is removed from the square shaft 36a. Then, at that position, the rotary shaft 50 does not move unless a predetermined force acts on the rotary shaft 50. It is adapted to be locked by a mechanism having a recess formed in the rotary shaft 50 into which the ball fits.

The worker cage 21 includes a lift table 16
Is provided with a transition plate 24.

An auxiliary power source (battery) 40 for the drive motor 35 with the brake device 37 is mounted on the lower portion of the stacker crane 13 (lower portion of the traveling carriage 14), and the auxiliary power source 40 is an automatic power source switching device. It is connected to the drive motor 35 with the brake device 37 via (not shown), and power is supplied to the drive motor 35 with the brake device 37 at the time of power failure by the action of the automatic power source switching device.

[0017]

[Modifications, etc.] Modifications will be described below. (1) Needless to say, the operator's cage 21 can be raised by the handle 49. (2) The worm reducer 43 may have a required number of gears for deceleration or not. (3) The cage drive rope 38 may be endless as such. (4) The rotating shaft 50 and the rotating shaft 36 may be connected so that they cannot be separated from each other.

[0018]

The present invention has the following effects due to the above-described structure. According to the invention of claim 1, even when the cage for the worker cannot be moved up and down by the drive motor with the brake device, the worker on the ground side rotates the handle after releasing the brake device. The worker cage can be manually lowered safely to immediately drop the worker in the worker cage to the ground. According to the invention of claim 2, by the self-locking function of the worm reducer, that is, the load of the operator's cage is not applied to the handle as a force for rotating the handle, the operator's cage can be safely operated manually. Can be lowered. According to the invention of claim 3, even during a power failure, the drive motor with the brake device is operated by the auxiliary power source to safely lower the operator's cage and immediately lower the operator in the operator's cage to the ground. You can

[Brief description of drawings]

FIG. 1 is a simplified plan view with an intermediate omitted, showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view along the line II-II of FIG.

FIG. 3 is an enlarged sectional view taken along line III-III of FIG.

FIG. 4 is an enlarged view of a part of the portion A in FIG.

[Explanation of symbols]

 15 Mast 21 Worker's cage 33 Lower wheel 34 Upper wheel 35 Brake device 37 drive motor 37 Brake device 38 Cage drive cord 49 Handle 57 Brake release lever

Claims (3)

[Claims] 1. An operator's cage that can be moved up and down along a mast, an upper and lower wheel rotatably provided in the upper and lower parts, and an operator's cage that is endless and is hung on the upper and lower wheels. A cage lifting device for a stacker crane having a cage drive line, a drive motor with a brake device for driving a lower wheel, a brake release means of the brake device, and a handle for rotating the lower wheel. 2. The cage lifting device for a stacker crane according to claim 1, wherein a worm speed reducer is interposed between the drive motor with the brake device and the lower wheel. 3. The cage lifting device for a stacker crane according to claim 1, wherein an auxiliary power supply for the drive motor with the brake device is mounted on the stacker crane.