JPH0447595Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a storage/unloading device suitable for use in warehouses that need to be isolated from outside air, such as refrigerated warehouses and constant temperature warehouses. .

[Prior Art] Forklifts are often used when loading and unloading cargo in conventional refrigerated warehouses, constant temperature warehouses, and the like. In this case, each time the forklift entered or left the warehouse, the forklift driver operated a pull switch located at the warehouse entrance to open and close the heat-insulated door at the warehouse entrance.

Additionally, some automated refrigerated warehouses used electric trolleys for loading and unloading equipment.

[Problem that the invention aims to solve] However, in warehouses that use forklifts, the heat-insulated doors must be opened wide enough to allow forklifts to enter and exit, regardless of the presence or absence of cargo. The drawback was that a large amount of cold air was lost when the lift moved in and out.

Furthermore, the heat-insulated door at the entrance/exit of an automated refrigerated warehouse only performs two operations: fully open and fully closed. Therefore, it is fine when moving between the inside and outside of the warehouse when the electric trolley is loaded, but when the electric trolley is empty When moving with
The heat-insulated door will open to a higher height than necessary,
There were disadvantages such as the opening/closing time of the heat insulating door becoming longer, the outflow of cold air becoming larger, the loss of energy due to the increased load on the refrigerator, and the time required for entering and exiting the warehouse.

This invention detects the height of the cargo on the loading/unloading cart passing through the entrance/exit of the warehouse, opens the heat-insulated door to a height corresponding to the height of the cargo, and shortens the time the heat-insulated door is open as much as possible. The purpose is to minimize the amount of cold air flowing out of refrigerated warehouses and constant temperature warehouses when entering and exiting warehouses.

[Means for Solving the Problems] The present invention provides a heat insulating door that is installed at the entrance of a warehouse and opens and closes in the vertical direction, a running rail that passes through the entrance and exits and is laid inside and outside the warehouse, and a an entry/exit trolley that travels to transport cargo; an entry/exit trolley detection device installed near the inside and outside of the entrance/exit of the warehouse to detect the approach/passage of the entry/exit cart; A height detection device that includes a plurality of light emitters and light receivers in the vertical direction and detects the passing height of an approaching loading/unloading cart, and a height detecting device that detects the height of the loading/unloading cart detected by the height detection device. This is a door opening/closing device that opens the heat-insulated door.

[Function] When the loading/unloading cart approaches the heat-insulated door, the loading/unloading cart detection device and height detection device provided on one side of the heat-insulated door detect this, and the door is closed. It opens according to the height of the unloading trolley, and when the input/output trolley detection device installed on the other side of the heat-insulated door detects the passage of the unloading/unloading trolley, it closes the heat-insulated door, minimizing the outflow of cold air. Try to hold it down.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 3 is a plan view showing a warehouse 1 such as a three-dimensional automatic refrigerated warehouse or a three-dimensional automatic thermostatic warehouse.Shelves 2 for storing goods in multiple stages and rows are provided in the warehouse 1, and a transfer device Loads are stored on the shelves 2 and loads are taken out from the shelves 2 by a stacker crane 4 having a stacker crane 3.

The entrance/exit 5 of the warehouse 1 is provided with a heat-insulated door 6 that can be opened and closed in the vertical direction by a door opening/closing device (not shown), and running rails 7 are laid inside and outside the warehouse 1 across the entrance 5. , the loading/unloading cart 8 running on the traveling rail 7 passes through the entrance/exit 5 and enters the warehouse 1.
It is designed to transport loads both inside and outside the country. The loading/unloading cart 8 is configured to transfer cargo to and from the transfer device 3 of the stacker crane 4 inside the warehouse 1, and to transfer cargo from a forklift or the like outside the warehouse 1.

2 is an enlarged view of the vicinity of the entrance/exit 5 in FIG. 3, and FIG. 1 is a sectional view taken along the - line in FIG. The inner running rail 7 is equipped with an in/out truck detection device 9 such as a limit switch, a phototube, etc., and an in/out truck detection device 10 is also attached to the running rail 7 outside the entrance/exit 5.
Furthermore, on both sides of the running rail 7 inside the entrance 5,
Height detection device 1 using phototube etc. with dew condensation prevention measures
1 is provided, and height detection devices 12 are also provided on both sides of the running rail 7 outside the entrance 5. 8 or the highest height (passing height) of the loaded load 13 can be detected.

The operation when the loading/unloading cart 8 receives the load 13 from the transfer device 3 of the stacker crane 4 and unloads it from the warehouse 1 will be explained.

When the transfer of the cargo 13 to the loading/unloading truck 8 is completed, the loading/unloading truck 8 moves forward toward the entrance/exit 5, as shown in FIG. When the loading/unloading cart 8 comes in front of the heat-insulated door 6, the loading/unloading truck detection device 9 confirms the arrival of the loading/unloading truck 8, and the height detecting device 11 detects the load 13 on the loading/unloading truck 8. The height of the top edge is detected. A door opening/closing device (not shown) is activated by the operation of the loading/unloading cart detection device 9 and the detection by the height detecting device 11, and the heat-insulating door 6 is raised to a height that allows the loading/unloading cart 8 and the load 13 loaded thereon to pass through. As shown in FIG. 4, the loading/unloading trolley 8 loaded with goods 13 exits the warehouse 1 through the entrance/exit 5. When the loading/unloading truck detection device 10 located outside the warehouse 1 confirms that the loading/unloading truck 8 has passed, the heat-insulating door 6 is closed as shown in FIG. The loaded loading/unloading cart 8 is transported to the warehouse 1
It stops at the tip of the running rail 7 outside.

Next, an explanation will be given of the operation when the loading/unloading trolley 8 goes from inside the warehouse 1 to outside the warehouse 1 to pick up the load in order to transport the load outside the warehouse 1 into the warehouse 1.

When the cargo to be stored is prepared outside the warehouse 1 and a warehousing command is issued, the loading/unloading cart 8 waiting inside the warehouse 1 moves forward toward the entrance/exit 5 without loading any cargo, and the loading/unloading cart 8 waits inside the warehouse 1 and advances towards the entrance/exit 5 without loading any cargo. The trolley detection device 9 confirms the arrival of the loading/unloading truck 8, and the height detecting device 11 detects the height of the loading/unloading truck 8. At this time, the object passing through is only the loading/unloading truck 8 and no cargo is loaded, so the heat-insulating door 6 opens only to a height that allows the loading/unloading truck 8 to pass through, as shown in FIG. When the warehousing/retrieving trolley detection device 10 confirms the passing of the warehousing/receiving trolley 8, the heat-insulating door 6 is closed as shown in FIG. The load is then loaded.

When the loading/unloading cart 8 enters the warehouse 1 from outside the warehouse 1, the loading/unloading cart detection device 10 confirms the arrival of the loading/unloading cart 8, the height detecting device 12 detects the height, The heat shield door 6 will be opened to a height corresponding to the detected height. When the warehousing and retrieval vehicle detection device 9 confirms that the warehousing and retrieval vehicle 8 has entered the warehouse, the heat-insulating door 6 is closed, and the airtightness within the warehouse 1 is maintained.

[Effects of the invention] The present invention detects the approach and passing of the loading/unloading cart passing through the entrance/exit of the warehouse using the loading/unloading cart detection device, and also uses a height detection device to detect the passing height of the loading/unloading cart approaching the entrance/exit. The system detects this and opens the heat-insulated door for the minimum amount of time and at the minimum height, which minimizes the outflow of cold air in refrigerated warehouses and constant-temperature warehouses, resulting in energy savings by reducing the load on refrigerators. be.

Further, the loading/unloading truck detection device and the height detection device can be easily implemented with a simple structure such as a phototube system, and can be operated reliably with an inexpensive device.

Furthermore, since there is no waste in the opening height of the heat insulating door, the time for opening and closing the heat insulating door is shortened, and the time required for loading and unloading cargo is shortened, making it possible to speed up work.

[Brief explanation of the drawing]

Fig. 1 is a sectional view taken along the - line in Fig. 2, Fig. 2 is a plan view showing the main parts of Fig. 3, Fig. 3 is a plan view of a warehouse equipped with the storage/unloading device of the present invention, Fig. 4 7 to 7 are cross-sectional views showing the operating state. In the diagram, 1 is a warehouse, 5 is an entrance, 6 is a heat-proof door, and 8
11 and 12 are height detection devices.

Claims (1)

[Scope of utility model registration request] A heat-insulated door installed at the entrance of the warehouse and opened and closed in the vertical direction, a running rail laid through the entrance and exit and inside and outside of the warehouse, a loading and unloading cart that runs on the running rail and transports cargo, and a warehouse. an entry/exit truck detection device installed near the inside and outside of the entrance/exit for detecting the approach/passage of an entry/exit truck; A height detecting device equipped with a light emitter and a light receiver for detection, and a door opening/closing device that opens the heat-insulated door to a height corresponding to the height of the loading/unloading cart detected by the height detecting device. A loading/unloading device featuring: