JPH066858B2 - Ladder device for maintenance work of automated warehouse - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a ladder device used for maintenance work or the like of a load collapse occurring in a shelf of an automated warehouse or on a crane.

(Prior art and its problems) Conventionally, when a load collapse occurs in a shelf of an automated warehouse, an operator climbs a truss support of the shelf or lifts a crane's lifting carriage to go to the place where the load collapse occurs. I used it instead. Of course, when a load collapse occurred on the lifting carriage of the crane, there was no choice but to climb the truss support of the shelf. Since such a work method is extremely dangerous, it is also possible to erect a ladder for the worker to go up and down during maintenance work on the pillar of the crane, but it is necessary to move the crane to the place where the load collapse occurs. However, there were drawbacks such as the need for crane operation engineers.

(Means for Solving Problems) The present invention proposes a ladder device for maintenance work of an automatic warehouse, which is capable of solving the above-mentioned conventional problems. A guide rail for ladder suspension movement is installed on the ceiling side of the crane passage, and one end of this guide rail is bent so as to separate laterally from the crane passage to form a ladder storage position, which can be moved to the guide rail. The ladder hung on is provided with a ladder determining means for fixing the ladder at an arbitrary position.

(Example) Hereinafter, one example of the present invention will be described with reference to the accompanying drawings.

In FIG. 1 and FIG. 2, 1 is a crane passage, which is formed between the shelves 2a and 2b for storing loads three-dimensionally,
The loading / unloading traveling crane 3 travels. Reference numeral 4 is a guide rail for suspending and moving a ladder, which is installed on the ceiling side of the crane passage 1. A ladder storage position 4a at one end of the guide rail is directed to a position adjacent to the end of the shelf 2a on one side of the crane home position. Is bent away from the crane passage 1. Reference numeral 5 denotes a maintenance work ladder movably suspended on the guide rail 4.

As shown in FIGS. 3 to 6, at the upper ends of the pair of right and left columns 6a and 6b of the ladder 5, the horizontal shaft wheel 7 rolling on the horizontal rail 4b of the guide rail 4 and the guide rail 4 are provided. The vertical shaft guide roller 8 that abuts on the outer surface of the vertical rail portion 4c and the bracket 9 that pivotally supports the vertical shaft 1 are respectively provided.
It is mounted so that it can rotate around 0.

Reference numerals 11A and 11B denote ladder fixing means attached to the lower ends of the columns 6a and 6b of the ladder 5, and the columns 6a and 6b.
The long hole 13 and the pin 14 are formed in the support member 12 fixed to the lower end of the
An elevating shaft 16 which is supported so as to be able to ascend and descend within a certain range and has a ground plate 15 at its lower end, a spring (not shown) for urging the elevating shaft 16 in the ascending direction,
A foot lever 18 having an intermediate portion pivotally connected to both side portions of the foot lever 18 by a pivot pin 17, and a foot step portion 1 of the foot lever 18
A connecting link 20 having both ends pivotally attached to the free end portion opposite to 8a and the support member 12 side by pivot pins 19a and 19b.
It consists of Reference numeral 21 is a walking deck plate laid on the floor of the crane passage 1 as shown in FIG.

As shown in FIGS. 3 and 6, an L-shaped hanging detection plate 22 is fixed to the lower end of the column 6a on one side of the ladder 5, and the detection plate 22 extends parallel to the ladder moving direction. A ladder fixing bolt 23 is fixedly provided on the above. Reference numeral 24 is a nut screwed into the bolt 23. Further, a fixing member 25 is fixedly provided on the floor so as to face the detection plate 22 of the ladder 5 located at the ladder storage position 4a at one end of the guide rail 4, and the fixing member 25 is provided with the fixing member 25. A limit switch 26 for pressing the actuator 26a by the detection plate 22 is attached, and a notch groove 27 into which the ladder fixing bolt 23 is fitted is formed on the upper side of the fixing member 25. Reference numeral 28 denotes a limit switch protection member attached to the fixing member 25 so as to surround the actuator 26a of the limit switch 26.

When not in use, the ladder 5 is hung at the ladder storage position 4a set at one end of the guide rail 4 and is distant from the crane passage 1, so there is no risk of obstructing the traveling of the crane 3. . Then, as shown in FIG. 3, the ladder 5 is slightly lifted or the nut 24 is removed to attach the ladder fixing bolt 23 to the cutout groove 2 of the fixing member 25.
7, the nut 24 is fastened, and the ladder 5 is fixed to the fixing member 25 at the position where the plate 22 to be detected kicks the actuator 26a of the limit switch 26.

As a result, there is no risk that the ladder 5 will accidentally move along the guide rail 4 into the crane passage 1. Further, if the traveling control circuit of the crane 3 is configured so that the crane 3 can travel only when the limit switch 26 detects the plate 22 to be detected, the ladder 5 is fixed at the ladder storage position 4a. It is possible to avoid a dangerous situation in which the crane 3 is driven and driven in the absence of the condition.

When using the ladder 5 for maintenance work, the nut 24
Loosen and lift the ladder 5 slightly or use the nut 24
By removing the ladder fixing bolt 23 from the notch groove 27 of the fixing member 25 and releasing the fixation of the ladder 5, the ladder 5 can be freely pushed to the maintenance work position along the guide rail 4 by hand. . Of course, when this maintenance work is performed, the crane 3 is on standby at one end of the crane passage 1 at the home position, so that the ladder 5 can be moved to any position in the crane passage 1 without being obstructed by the crane 3. When using the ladder 5 to perform maintenance work on the crane 3 stopped in the crane passage 1, it is sufficient to move the ladder 5 to a position adjacent to the crane 3.

When the ladder 5 is moved to the maintenance work position, as shown in FIG. 5, the stepping portion 18a of the stepping lever 18 of the ladder fixing means 11A, 11B is stepped down to lift the lifting shaft 1
6 is lowered against the urging force of a spring (not shown) to bring the ground plate 15 into contact with the deck plate 21, but after the ground plate 15 comes into contact with the deck plate 21,
By further stepping down the foot lever 18, the ladder 5
Is slightly raised with respect to the lifting shaft 16. As a result, as shown in the drawing, the pivot pin 19a between the foot lever 18 and the connecting link 20 crosses the neutral line connecting the pivot pin 17 of the foot lever 18 and the other end pivot pin 19b of the connecting link 20. In this state, the lifting shaft 16 is locked in the lowered position by the biasing force of the spring that contacts the support member 12 and biases the lifting shaft 16 in the rising direction and the weight of the ladder 5. Although it has been described that the pivot pin 19a comes into contact with the support member 12, a stopper for restricting the downward swing of the foot lever 18 may be provided separately.

By fixing the lower end of the ladder 5 to the deck plate 21 by grounding it as described above, not only can the ladder 5 be safely climbed up and down, but also the horizontal axis wheel 7 can be removed from the horizontal rail portion 4b of the guide rail 4. Since it floats, the weight of the operator does not act on the guide rail 4, the guide rail 4 can be made of a thin steel plate, and the supporting strength of the guide rail 4 can be low.

When the width of the crane passage 1 (the distance between the shelves 2a and 2b on the left and right sides) is narrow, one ladder 5 can be hung and moved in the crane passage 1 as shown in FIG. The guide rail 4 can be installed, but the crane passage 1
When the width (width between the left and right shelves 2a, 2b) is wide, a guide rail 4 for suspending and moving the ladder 5 can be installed adjacent to each of the shelves 2a, 2b.

(Operation and Effect of the Invention) As described above, according to the ladder device for maintenance work of the automated warehouse of the present invention, maintenance work is performed by using the guide rails for ladder suspension movement installed on the ceiling side of the crane passage between shelves. The ladder can be moved to any position within the crane aisle and is safer compared to when going up and down the truss stanchions on shelves or when using the crane's lifting carriage to replace the elevator. Sexuality is greatly improved.
Moreover, it is not necessary to operate the crane as in the case where the ladder provided on the crane must be used, and maintenance work using the ladder is possible even if there is no crane operation engineer or the crane itself cannot move. Easy to do. In addition, unused ladders can be stored in the ladder storage position at the end of the guide rail that is bent laterally away from the crane passage, so normal loading and unloading work using the crane is obstructed by the ladder. There is no fear of

[Brief description of drawings]

FIG. 1 is a schematic plan view, FIG. 2 is a schematic front view, FIG. 3 is a partially cutaway front view showing the ladder fixed to a ladder storage position, and FIG. 4 shows a suspended state of the ladder. Partially cutaway side view, FIG. 5 is a partially cutaway side view when the ladder fixing means is used, and FIG. 6 is a partially cutaway view showing the ladder fixing means and the lower end of the ladder in the ladder storage position. It is a front view. DESCRIPTION OF SYMBOLS 1 ... Crane passage, 2a, 2b ... Shelf, 3 ... Traveling crane for loading / unloading, 4 ... Guide rail for ladder suspension movement, 4a
... Ladder storage position, 5 ... Ladder, 11A, 11B ... Ladder fixing means, 15 ... Grounding board, 16 ... Elevating shaft, 18 ... Foot lever, 20 ... Connection link, 22 ... Detected plate, 23 ... Ladder fixing bolt, 25 ... Fixing member, 26 ... Limit switch, 27 ... Notch groove.

Claims (1)

[Claims] A guide rail for suspending and moving a ladder is installed on the ceiling side of a crane passage between shelves in an automated warehouse, and one end of this guide rail is bent laterally away from the crane passage so that a ladder storage position is provided. A ladder device for maintenance work of an automatic warehouse, wherein the ladder movably suspended on the guide rail is provided with ladder fixing means for fixing the ladder at an arbitrary position.