JPH089403B2 - Heat radiation resistance unit of stacker crane - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for mounting a heat radiation resistance unit that dissipates regenerative current generated in an electric circuit of a stacker crane drive motor as heat.

[0002]

2. Description of the Related Art Conventionally, an elevating frame is moved up and down along a front mast and a rear mast, and the front mast and the rear mast are fixed to a lower frame and an upper frame, respectively, and a lower traveling rail and an upper guide rail are provided. The technology relating to a stacker crane that is moved back and forth to store a load at a predetermined rack position by a slide fork of an elevating frame is known.

[0003]

Also in the above-mentioned prior art, a heat dissipation resistor is used in order to dissipate the regenerative current generated in the electric circuit of the drive motor as heat.
It was placed as inconspicuous as possible under the onboard control panel. However, this structure has a problem that the heat dissipation effect of the heat dissipation resistor is low. In addition, the heat dissipation resistance is exposed, the design is poor, and there is a problem in safety. The present invention solves such a problem of the conventional technique.

[0004]

The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be described. Of the stacker crane drive motor
Connected to the control circuit to convert the regenerative current of the drive motor into heat.
The heat radiation resistance that dissipates and dissipates a plurality of heat radiation resistances in parallel
Cover the heat dissipation resistance board and the heat dissipation resistance on the heat dissipation resistance board.
A heat radiation resistance unit having a breathable cover is configured, and the heat radiation resistance unit is attached to the stacker crane body via a hinge.

[0005]

Next, the operation will be described. Heat dissipation resistance 16 and heat dissipation resistance
The substrate 15 and the breathable cover 10 allow the heat dissipation resistance unit U
Are configured. The heat dissipation resistor 16 is supported by the heat dissipation resistor board 15.
In lifting state, it is covered by a breathable cover 10. Then, the heat radiation resistance unit U is
It is fixed to the stacker crane body. Therefore heat dissipation resistance
By rotating the unit U, the heat dissipation resistance unit
The rear side of U can be seen, and maintenance and replacement work can be easily performed. In addition, the heat dissipation resistance unit U
By rotating, the maintenance of the main body portion located on the back surface of the heat radiation resistance unit U can be easily performed.

[0006]

EXAMPLES Next, examples will be described. FIG. 1 is an overall side view of the stacker crane of the present invention, FIG. 2 is a perspective view of a breathable cover 10 and a heat radiation resistance substrate 15 which are essential parts of the present invention, and FIG. Resistance unit U
FIG. 4 is a plan view of a state in which the hood is attached, FIG.
FIG. 3 is a circuit diagram of a lifting drive motor 20, an inverter 18, a brake mechanism 19, and a heat radiation resistor 16.

The automatic warehouse system of this embodiment will be described. On the left and right sides of the traveling rail of the stacker crane shown in FIG. 1, racks arranged in a plurality of rows and a plurality of stages are arranged along the traveling rail. Then, the load P can be stored in a desired rack position by the slide fork of the stacker crane, and the load can be taken out as needed. The stacker crane is operated by a control panel A which receives an operation signal from a switch provided on the operation panel C, a card reader, or an upper CPU.
This is done by driving an elevating drive motor, a traveling drive motor, etc., by operating an electromagnetic switch or the like therein. Further, manual operation on the ground is possible with the operation panel C, and if a manual controller is attached to the control panel A, manual operation on the machine is also possible.

Next, the overall structure of the stacker crane will be described. A stacker crane mechanism including a front mast 11, a rear mast 12, an upper frame 7 and a lower frame 8 moves back and forth on a traveling rail. The traveling on the traveling rail is performed by a traveling drive motor arranged inside the drive unit B. Further, the elevating frame 1 is vertically moved between the front mast 11 and the rear mast 12 by the elevating drive motor and the chain which are also arranged inside the drive unit B. A drive unit B is arranged at the base of the front mast 11, and an onboard control panel A is arranged at the base of the rear mast 12. Further, the step 24 is arranged integrally with the onboard control panel A. The heat radiation resistance unit U of the present invention is provided with a heat radiation resistance in a portion constituted by the breathable cover 10 and the like, and is fixedly attached to the side of the drive section B by a hinge 21. The drive section B is covered with a drive cover 9.

[0009] The present invention is in a stacker crane, which is configured as described above, by sliding the fork, the upper rack
When the load P placed on the rack is taken out and then the lifting frame 1 is lowered next, when the load P placed on the uppermost rack is repeatedly taken out, the weight of the lifting frame 1, a state in which the elevation drive motor 20 is driven in the reverse, the regenerative current is generated by the driven force, the regenerative current temperature <br/> descending drive motor 20 and a high temperature It will be.

In order to prevent the temperature of the lifting drive motor 20 from rising, in this configuration, as shown in the control circuit diagram of FIG. 6, an inverter 18 is provided to regenerate the driven force of the lifting drive motor 20. It is changing to voltage. Then, at the time of unloading in an excessive load state where the regenerative voltage generated by the inverter 18 becomes a certain value or more, a braking force driven by the regenerative voltage is applied to the lifting drive motor 20 driven by the brake mechanism 19. Multiply by to suppress the downward acceleration. Further, the surplus regenerative voltage used in the brake mechanism 19 is dissipated as heat into the atmosphere by the heat dissipation resistor 16 of the present invention, so that the temperature rise of the elevation drive motor 20 is prevented.

The arrangement of the heat radiation resistor 16 of the present invention will be described with reference to FIGS. The drive section B has a lifting drive motor 20 and a traveling drive motor arranged therein.
The periphery thereof is surrounded by the drive unit frame 29. The drive frame 29 is covered with the drive cover 9. A plurality of heat dissipation resistors 16 of the present invention are fixed to the heat dissipation resistor substrate 15, the breathable cover 10 is covered from the heat dissipation resistor substrate 15, and a breathable net plate 17 is provided on a part of the breathable cover 10. . As the stacker crane travels back and forth from the breathable net plate 17, cooling air flows in and out to cool the heat radiation resistance 16. In the embodiment, six heat radiation resistors 16 are fixed in parallel to the heat radiation resistor substrate 15.

The heat radiation resistance substrate 15 is pivotally supported on the drive unit frame 29 via a hinge 21. Therefore, when it is desired to maintain the heat radiation resistor 16, the heat radiation resistor substrate 15 can be opened to obtain the exposed portion of the heat radiation resistor 16. Further, the maintenance of the terminal plate or the like located on the back surface of the heat radiation resistance unit U can be easily performed by opening the heat radiation resistance substrate 15.

[0013]

Since the present invention is constructed as described above, the following effects can be obtained. That is, the stack
Driven by connecting to the control circuit of the drive motor of the crane
Radiation resistance that converts the regenerative current of the motor for heat into heat and dissipates it 1
6 and a heat dissipation resistor substrate 1 in which a plurality of heat dissipation resistors 16 are arranged in parallel.
5 and ventilation for covering the heat dissipation resistor 16 on the heat dissipation resistor substrate 15
A heat dissipation resistance unit U having
The heat radiation resistance unit U is stacked via the hinge 21.
Since it is attached to the lane body, the heat dissipation resistance unit U
From the back side of the heat dissipation resistance unit U by opening and closing
Maintenance, and it is is able to easily perform the maintenance of the body portion located on the back of the heat radiation resistance unit U. Further, the heat radiation resistance 16 is provided inside the breathable cover 10.
By storing the, it was possible to improve the overall design.

[Brief description of drawings]

FIG. 1 is an overall side view of a stacker crane of the present invention.

FIG. 2 is a perspective view of a breathable cover 10 and a heat radiation resistance substrate 15 which are essential parts of the present invention.

FIG. 3 is a plan view showing a state in which a heat radiation resistance unit U is attached to a drive section B via a hinge 21.

FIG. 4 is a front view of a breathable cover 10 and a heat dissipation resistor 16.

FIG. 5 is a plan view of the same.

6 is a circuit diagram of a lifting drive motor 20, an inverter 18, a brake mechanism 19, and a heat radiation resistor 16. FIG.

[Explanation of symbols]

 A control part B drive part U heat dissipation resistance unit 9 drive part cover 10 breathable cover 15 heat dissipation resistance substrate 16 heat dissipation resistance 17 breathable net plate 20 lifting drive motor 21 hinge

Claims (1)

[Claims] 1. A control of a drive motor for a stacker crane
It is connected to the circuit and converts the regenerative current of the drive motor into heat.
Heat radiation resistance that is dissipated by
Ventilation that covers the heat resistance board and the heat dissipation resistance on the heat dissipation resistance board
Heat dissipation resistance unit having a heat-resistant cover, and the heat dissipation resistance unit is attached to the stacker crane main body via a hinge.