JPH11124206A - Device for adjusting mast inclination in stacker crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten operation time and facilitate work in adjusting mast inclination in a stacker crane. SOLUTION: This stacker crane has a lower frame 3 which runs with a wheel 2 along an orbit 1 provided on floor, etc., a pair of masts which is provided on the lower frame 3, and a carriage and fork which move up and down along the pair of masts. The device for adjusting mast inclination of the stacker crane comprises a shaft 12, which has an eccentric structure and supports the wheel 2 of the lower frame 3, and a locking mechanism 17, which continuously locks the eccentricity due to the rotation of the shaft 12. When the lock at the locking mechanism 17 is released, so as to make the shaft 12 eccentric, the wheel 2 can move up and down toward the lower frame 3. The up and down movement of the wheel adjusts mast inclination.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adjusting device for adjusting the inclination of a mast that stands on a stacker crane.

[0002]

2. Description of the Related Art Conventionally, as a stacker crane, FIG.
As shown in FIG. 1, a lower frame 3 is provided that travels along front and rear wheels 2 along a track installed on a floor or the like in an automatic warehouse. A carriage that stands up and moves via rollers 6 along upper rails 5 installed on a ceiling or the like over the upper ends of the pair of front and rear masts 4 and that moves up and down along the pair of front and rear masts 4 The carriage 8 is provided with a fork 9 for transferring luggage. The lower frame 3 has a traveling device 1 such as a motor.
0, and a lifting device 11 such as a motor is mounted on one of the pair of front and rear masts 4.

In such a stacker crane, the mast 4 may not be able to stand upright on the lower frame 3 at the time of assembling, but may be inclined, which is orthogonal to the traveling direction of the stacker crane. As for the direction, since the upper frame 7 is arranged along the upper rail 5 via the roller 6, the mast 4 is regulated by the upper rail 5, and the mast 4 is hardly greatly inclined.
There is no restriction on the traveling direction of the stacker crane, so that the mast 4 may be greatly inclined.

Therefore, conventionally, a shim has been inserted into the joint between the lower frame 3 and the mast 4 for adjustment. Alternatively, the eccentric flange 30 is interposed on the wheel 2 of the lower frame 3. This is achieved by fixing the eccentric flange 30 to the axle 31 of the wheel 2 as shown in FIGS.
0 is fixed to the bracket 32 of the lower frame 3 with a bolt 33, and the eccentric flange 30 is removed by removing the bolt 33.
In addition, the inclination of the mast 4 is adjusted by eccentricizing the axle and re-fastening and fixing with the bolt 33.

[0005]

In the conventional operation of adjusting the inclination of the mast by using a shim, the mast is removed from the lower frame at the joint portion between the lower frame and the mast, and the adjusting operation is performed. The mast has to be attached to the lower frame again, and if the adjustment is not successful after the mast is attached, it is necessary to remove the mast again from the lower frame. Could be difficult.

Also, in the operation of adjusting the inclination of the mast by interposing an eccentric flange on the wheel of the lower frame, there is a space limitation in a bolt hole for fixing the eccentric flange. There is a limit on the number of
There has been a problem that the eccentricity of the eccentric flange and the axle can only be adjusted in a stepwise manner, and fine adjustment cannot be performed. Especially for high-lift type stacker cranes,
The displacement here was a large displacement of several tens of centimeters or more at the upper end, making it difficult to adjust to the optimal position. An object of the present invention is to solve these problems.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a lower frame which travels via wheels along a track installed on a floor or the like, and a pair of lower frames mounted on the lower frame. In a stacker crane provided with a carriage and a fork that erects a mast and moves up and down along the pair of masts, as a mast inclination adjusting device in the stacker crane, a shaft that supports wheels of the lower frame has an eccentric structure. A lock mechanism for steplessly fixing the eccentricity due to the rotation of the shaft, and releasing the fixation in the lock mechanism and performing the eccentricity of the shaft so that the wheel can be moved up and down with respect to the lower frame. .

[0008]

The shaft supporting the wheels of the lower frame has an eccentric structure and a lock mechanism for fixing the eccentricity caused by the rotation of the shaft in a stepless manner. By allowing the wheels to move up and down with respect to the lower frame by performing eccentricity, the inclination of the mast can be adjusted by moving the wheels up and down. By eliminating the need to perform such operations, the working time can be greatly reduced, and the work can be facilitated, and the workability can be improved. In addition, since the eccentricity due to the rotation of the shaft can be fixed in a stepless manner in the lock mechanism, the mast inclination can be adjusted steplessly, and fine and fine adjustment can be performed. it can.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As a conventional stacker crane, as shown in FIG. 1, as shown in FIG. 1, a lower stacker crane travels along front and rear wheels 2 along a track 1 installed on a floor or the like in an automatic warehouse. A pair of front and rear masts 4 are provided upright in front of and behind the lower frame 3, and move along rollers 6 along upper rails 5 installed on a ceiling or the like over upper ends of the pair of front and rear masts 4. And a carriage 8 that moves up and down along a pair of front and rear masts 4, and a fork 9 for transferring cargo is mounted on the carriage 8. A traveling device 10 such as a motor is mounted on the lower frame 3, and a lifting device 11 such as a motor is mounted on one of the pair of front and rear masts 4.

One of the front and rear wheels 2 mounted on the lower frame 3, for example, the rear wheel 2, is provided with a shaft 12 for supporting the wheels 2 as shown in FIGS. An eccentric structure is adopted, in which the shaft 12 has two stages of a small diameter portion 13 and a large diameter portion 14, and the two centers are shifted to form an eccentric structure. The small diameter portion 13 is fixed to the lower frame 3 side of the housing 15. Located on the inside, the large diameter portion 14 is located inside the wheel 2 to rotatably support or support the wheel 2. A hexagonal nut portion 16 for rotating the shaft 12 is fixed to the end (of the small diameter portion 13) of the shaft 12.

On the other hand, between the small diameter portion 13 of the shaft 12 and the housing 15, there is provided a lock mechanism 17 for fixing the eccentricity due to the rotation of the shaft 12 in a stepless manner. Small diameter part 1 of shaft 12
A ring-shaped fixed block 19 having a flange portion 18 formed is fixed around the entire outer periphery of the fixed block 3. The fixed block 19 has a tapered surface 20 and a plurality of insertion holes formed on the side surface thereof at equal intervals in the circumferential direction. 21 are formed. A plurality of small moving blocks 22 are arranged on the outer periphery of the small diameter portion 13 of the shaft 12 at equal intervals in the circumferential direction, and the moving block 22 has an inclined surface 23 facing the tapered surface 20 of the fixed block 19. The fixing block 19 is movable so as to slide on the tapered surface 20 of the fixing block 19, and a bolt hole 24 is formed. The fastening body 25 inserted into the insertion hole 21 of the fixing block 19 is formed in the bolt hole 24. A certain bolt 26 is screwed.

Thus, by tightening the bolt 26, each moving block 22 moves outward (outer circumferential direction) while sliding on the tapered surface 20 of the fixed block 19.
The shaft 12 is grasped and fixed by being pressed against the inner peripheral surface of the housing 15 fixed to the lower frame 3 side.

On the other hand, when the bolt 26 is loosened, each moving block 22 moves inward (inner circumferential direction) while sliding on the tapered surface 20 of the fixed block 19, and moves away from the inner circumferential surface of the housing 15. Then, the fixing of the shaft 12 is released, and in this state, the shaft 12 can be rotated to perform the eccentricity of the shaft 12.

By performing the eccentricity of the shaft 12 in this manner, the wheels 2 can be moved up and down with respect to the lower frame 3,
The vertical movement of the wheels 2 makes it possible to adjust the inclination of the mast 4 erected on the lower frame 3 via the lower frame 3 in the running direction.

In the case where the mast 4 inclines in the running direction after the stacker crane is assembled, first, the inclination of the mast 4 is measured using an inclinometer, and then a jack is inserted into a lower portion of the lower frame 3. And jack up the lower frame 3. Then, the inclination of the mast 4 is measured by using the inclination measuring device while jacking up, and when the inclination of the mast 4 disappears, that is, when the mast 4 becomes substantially vertical, the jacking up is stopped. Next, in this state, the bolts 26 are loosened in the lock mechanism 17 to release the fixing of the shaft 12, and the shaft 12 is rotated using the nut 16 of the shaft 12 to perform eccentricity. When the rolling surface, which is the outer periphery of the wheel 2, comes into contact with the track 1 installed on the floor or the like, the bolts 26 are tightened in the lock mechanism 17 in this state to grasp and fix the shaft 12. As a result, the inclination of the traveling direction of the mast 4 can be adjusted, and the mast 4 can be made vertical.

In the operation of adjusting the inclination of the mast 4 in this manner, the bolt 26 in the lock mechanism 17 is loosened, the eccentricity is caused by the rotation of the shaft 12, and the bolt 2
6 is a simple task of tightening, and by eliminating the need to remove the mast 4 from the lower frame 3 one by one to perform the work as in the related art, the work time can be greatly reduced and the work is also easy. And workability can be improved.

In addition, the lock mechanism 17 uses the shaft 1
Since the eccentricity due to the rotation of 2 can be fixed steplessly, the adjustment of the inclination of the mast 4 is stepless, that is, linear (linear) rather than stepwise as in the conventional case. By performing the adjustment, fine and fine adjustment can be performed. In particular, this fine adjustment is very important in a high-lift type stacker crane, that is, when the height of the mast 4 in the stacker crane is 30
For the high-lift type that is more than meters, even if the mast 4 is slightly inclined, the upper end has a large deviation of several tens of centimeters to about 1 meter. Can be substantially eliminated.

Further, fixing and releasing of the shaft in the lock mechanism portion is a work of only loosening or tightening the bolt, and the work can be made very simple without having to remove the bolt each time.

In the above-described embodiment, only one of the front and rear wheels 2 is provided with the eccentric structure of the shaft 12 and the lock mechanism 17, but this is applied to both the front and rear wheels 2. It may be provided.

[0020]

The shaft for supporting the wheels of the lower frame has an eccentric structure, and a lock mechanism for fixing the eccentricity due to the rotation of the shaft in a stepless manner is provided. By making the shaft eccentric, the wheels can be moved up and down with respect to the lower frame,
The inclination of the mast can be adjusted by moving the wheels up and down, and by eliminating the need to remove the mast from the lower frame one by one to perform the work, the working time can be greatly reduced. In addition, the work can be facilitated, and the workability can be improved. In addition, since the eccentricity due to the rotation of the shaft can be fixed steplessly in the lock mechanism, the inclination of the mast can be adjusted steplessly, and fine and fine adjustment can be performed. .

Further, the fixing and releasing of the shaft in the lock mechanism portion is a work of only loosening or tightening the fastening body, so that the work can be made very simple.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a stacker crane.

FIG. 2 is an explanatory view of a mast inclination adjusting device in the stacker crane of the present invention.

FIG. 3 is a sectional view of a mast inclination adjusting device in the stacker crane of the present invention.

FIG. 4 is an explanatory view of a means for adjusting the inclination of a mast in a conventional stacker crane.

FIG. 5 is a sectional view in FIG. 4;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Track, 2 ... Wheel, 3 ... Lower frame, 4 ... Mast, 5
... upper rail, 6 ... roller, 7 ... upper frame, 8 ... carriage, 9 ... fork, 10 ... traveling device, 11 ... elevating device, 12 ... shaft, 13 ... small diameter portion, 14 ... large diameter portion, 1
5 Housing, 16 Nut, 17 Lock mechanism, 18 Flange, 19 Fixed block, 20 Tapered surface, 21 Insert hole, 22 Moving block, 23
Inclined surface, 24 ... bolt hole, 25 ... fastening body, 26 ... bolt, 30 ... eccentric flange, 31 ... axle, 32 ... bracket, 33 ... bolt.

Claims (2)

[Claims] 1. A lower frame 3 running via wheels 2 along a track 1 provided on a floor or the like, and a pair of masts 4 are erected on the lower frame 3 to form a pair of masts. 4
In the stacker crane provided with the carriage 8 and the fork 9 that move up and down along the shaft, the shaft 12 that supports the wheels 2 of the lower frame 3 has an eccentric structure, and the eccentricity due to the rotation of the shaft 12 is fixed steplessly. A mast in a stacker crane, comprising a lock mechanism 17, wherein the wheel 2 can be moved up and down with respect to the lower frame 3 by releasing the fixation in the lock mechanism 17 and performing eccentricity of the shaft 12. Tilt adjustment device. The lock mechanism 17 includes a ring-shaped fixed block 19 fixed to the entire outer periphery of the shaft 12 and having a tapered surface 20, and a plurality of fixed blocks 19 disposed on the outer periphery of the shaft 12 and having a tapered surface 20 of the fixed block 19. The tapered surface 2 of the fixed block 19 having the inclined surface 23 facing the
0, and a fastening member 25 for fastening the moving block 22 to the fixed block 19. When the fastening by the fastening member 25 is performed, the moving block 22 moves and moves into the housing 15 located outside. 2. The mast tilt adjusting device for a stacker crane according to claim 1, wherein the eccentricity due to the rotation of the shaft 12 is fixed steplessly by grasping and fixing the shaft 12 by being pressed. .