JP2577957B2 - Traveling crane for automatic warehouse - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

(Industrial application field) The present invention relates to a traveling crane for entry and exit traveling along a shelf of an automatic warehouse, and particularly to a traveling crane having an operation panel for manually operating the crane. (Prior Art) This type of traveling crane is provided with a manual operation panel at the end of the crane traveling direction on the lower frame, which is usually referred to as a home position, at an end on the cargo handling side, The crane is configured to be able to be manually operated at the time of maintenance inspection or emergency, and an operation switch for emergency stop is provided on the operation panel for manual operation. Therefore, if an emergency occurs during manual operation, the driver can operate the emergency stop operation switch on the operation panel to stop the crane in an emergency manner. was there. (Problems to be Solved by the Invention) That is, an operator sometimes enters a crane traveling passage narrow between shelves during maintenance and inspection work. In such a case, the emergency stop operation switch on the manual operation panel must be operated in advance, but traveling on the opposite side of the crane from the side with the manual operation panel is performed. When a worker enters the passage, it is very difficult for the worker to operate the emergency stop operation switch on the operation panel, and the operation is troublesome. Further, since the operator operating the manual operation panel is less likely to be noticed by an operator who is in the traveling passage on the side opposite to the side where the manual operation panel is located than the crane, the crane It is very dangerous because there is a risk of operating the crane without noticing that there is a worker in the traveling direction.

[Means for Solving the Problems]

An object of the present invention is to provide a traveling crane for an automatic warehouse that can solve the conventional problems as described above, and the means are indicated by reference numerals in the embodiments described below. An entry / exit traveling crane 1 traveling along a shelf, comprising a manual operation panel 19, first and second two operation switches 20, 23, and control means 25 to 27. The operation panel 19 is a lower frame of the crane 1
The first operation switch 20 is provided on one end of the front and rear ends in the traveling direction of the switch 13.
The second operation switch 23 is disposed on an end of the lower frame 13 on the side not provided with the manual operation panel 19, and the control means 25 to 27 perform the first operation Switch 20
The crane 1 has a function of disabling at least traveling of the crane 1 regardless of which of the first and second operation switches 23 is operated. (Effects of the Invention) In such a traveling crane of the present invention, even when an operator enters the crane traveling passage 4 on either side of the traveling direction of the crane 1, the first and second operation switches 20. , 23, the operation switch on the side closer to the worker,
That is, by operating either the first operation switch 20 on the operation panel 19 or the second operation switch 23 on the opposite side, the control means 25 to 27
Accordingly, at least the traveling of the crane 1 can be disabled. Therefore, when an emergency occurs while the crane 1 is operated manually by operating the manual operation operation panel 19, the worker is placed in the crane traveling passage 4 on the side where the manual operation operation panel 19 is located. When working with the operation panel 19, the first operation switch 20 on the operation panel 19 can be operated to prevent the crane 1 from running unexpectedly. Even when a worker enters the crane traveling passage 4 on the opposite side to a certain side and works, the worker does not need to climb over the crane 1 and go to the front of the operation panel 19, and the second operation switch on the opposite side. By operating 23, the traveling of the crane 1 is similarly disabled, so that safety can be ensured. (Effects of the Invention) As described above, according to the traveling crane of the present invention, even if an operator enters the crane traveling path 4 on either side of the traveling direction of the crane 1, the crane 1 cannot travel. The securing operation can be performed very easily and easily. Also, as long as the traveling of the crane 1 is disabled by the second operation switch 23 on the opposite side, not on the operation panel 19, another operator operates the operation panel 19 for manual operation to switch the crane 1 on. Since there is no danger of running, the work in the crane traveling passage 4 on the opposite side of the side where the manual operation panel 19 is located can be performed safely. (Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes a loading / unloading traveling crane, which can travel along the shelves 2 and 3 in a traveling passage 4 between the shelves 2 and 3 arranged side by side. Reference numerals 5 and 6 denote a reciprocating carriage for loading and unloading, a load transfer position A adjacent to the home position 7 of the traveling crane 1 set at one end of the crane traveling passage 4, and a load transfer position B further away therefrom. Can be guided by the guide rails 8 and 9. 1
Reference numeral 0 denotes a safety enclosure surrounding the end of the crane traveling passage 4 on the home position 7 side. An opening / closing door is attached to a part of the safety enclosure, and an operation panel 11 for automatic operation is further attached. The traveling crane 1 connects a lower frame 13 guided by a guide rail 12 on the floor surface and an upper frame 15 guided by a guide rail 14 on the ceiling as shown in FIG. A running fork for transferring a load between the shelves 2, 3 and the reciprocating trolleys 5, 6, which stop at the load transfer position A, on a lifting carriage 17 which moves up and down between the two columns 16. And the like. Reference numeral 19 denotes a manual operation operation panel provided on the end on the home position 7 side of the front and rear ends of the lower frame 13 in the crane traveling direction, and a first operation for emergency stop together with various operation switches. A switch 20 is provided.
21 is an end on the opposite side of the front and rear ends of the lower frame 13 in the crane traveling direction, on the side opposite to the side where the manual operation panel 19 is located,
That is, this is an operation box attached to the end of the crane travel path 4 on the out position 22 side, and a second operation switch 23 for inspection is attached as shown in FIG. These first operation switch 20 and second operation switch 23
Is a push button switch which is generally called a push lock type push button switch, that is, if the push button 24 is pushed in as shown in FIG.
Is a push button switch of the type in which the lock is released by rotating the push button 24 and the push button 24 is restored. Each of these switches 20, 23 has normally closed contacts 20a, 23a which open when the push button 24 is pressed, as shown in FIG. 4, and both normally closed contacts 20a, 23a are connected to the electromagnetic relay 25 in series. And a contact 25a that is closed by the excitation operation of the electromagnetic relay 25 is connected to a power supply circuit 27 of a control device 26 that controls the traveling drive of the traveling crane 1, the elevation drive of the lifting carriage 17, and the driving of the load transfer means 18. It is interposed in. According to the above configuration, in a state in which neither the first operation switch 20 nor the second operation switch 23 is operated, that is, in a state in which the normally closed contacts 20a and 23a are both closed, the electromagnetic relay 25 is Since the contact is excited and the contact 25a is closed, the power supply circuit 27 of the control device 26 is closed, and the control device 26 can function. Therefore, the operator can operate various operation switches on the operation panel 19 for manual operation, so that the traveling drive of the traveling crane 1, the elevation drive of the lifting carriage 17, and the driving of the load transfer means 18 can be appropriately performed. If an emergency occurs during the operation of manually operating the traveling crane 1 as described above, the operation panel
By pushing in the push button 24 of the first operation switch 20 for emergency stop on 19 and locking it and switching the normally closed contact 20a to the open state, the electromagnetic relay 25 is demagnetized and the contact 25a opens, and the control device 26 Is disconnected from the power supply and traveling crane 1
All driving of is automatically stopped. Also, when the worker enters the crane traveling path 4 between the traveling crane 1 and the home position 7 to perform work, the first operation on the manual operation panel 19 of the traveling crane 1 as described above is performed. By operating the switch 20, any operation of the traveling crane 1 is disabled, and safety can be ensured. When an operator enters between the traveling crane 1 and the out position 22 in the crane traveling path 4 and performs work, the worker enters the second inspection check box 21 in the out position side operation box 21 of the traveling crane 1. By pushing and locking the push button 24 of the operation switch 23 and switching the normally closed contact 23a to the open state, the first operation switch 20
The electromagnetic relay 25 is demagnetized and the contact 25
a is opened, the control device 26 is disconnected from the power supply, and any operation of the traveling crane 1 is disabled. Therefore, it is possible to avoid a dangerous situation in which another operator operates the operation panel for manual operation 19 to cause the traveling crane 1 to travel forward by mistake.

[Brief description of the drawings]

1 is a schematic plan view of an automatic warehouse, FIG. 2 is a side view of a traveling crane, FIG. 3 is a perspective view showing an operation box, and FIG. 4 is a control circuit diagram. 1 ... traveling crane for loading and unloading, 2,3 ... shelf, 4 ... crane traveling passage, 5,6 ... reciprocating carriage for loading and unloading, 7 ... home position, 12, 14 ... guide rail, 13 …… Lower frame, 15 …… Upper frame, 16 …… Prop, 17 …… Elevating carriage, 18… Load transfer means, 19 …… Manual operation panel, 20 …… First operation switch (Emergency stop Switches), 20a, 23a ... normally closed contacts, 21 ... operation box, 22
... Out position, 23 ... Second operation switch (check switch), 24 ... Push button, 25 ... Electromagnetic relay (Control means), 26 ... Control device (Control means), 27 ... Power circuit ( Control means).

Claims (1)

(57) [Claims] 1. A traveling crane for loading and unloading traveling along a shelf, comprising a manual operation panel, first and second operation switches, and control means. Is provided on one of the front and rear ends of the lower frame of the crane in the running direction, a first operation switch is provided on the manual operation panel, and a second operation switch is provided. Is disposed on the end of the lower frame on the side without the manual operation panel, and the control means controls the crane of the crane regardless of whether the first operation switch or the second operation switch is operated. A traveling crane for automated warehouses that has at least the function of disabling traveling.