JPH0624522A - Drive mechanism for stacker crane - Google Patents

Abstract

PURPOSE:To facilitate maintenance of a chain by mounting a chain cover in such a manner as to be inserted into/detached from an insertion grooves which are provided inside of both side walls of travelling bodies. CONSTITUTION:A chain cover 29 for preventing chains 31, 32, which are wound around between an elevating motor and an elevating frame so as to lift/lower the elevating frame of a stacker crane, from making contact with a travel rail 14 in their hanged conditions, is so constituted as to be inserted from the front side into the inside of insertion grooves 30a, 30b which are provided on left and right bearing support side walls 30L, 30R of travelling bodies 8L, 8R. The chains 31, 32 are of such a length as to go around from the elevating motor to the top lifting position and lift/lower heavy materials so that the chains tend to extending easily, and highly frequent inspections and repairs are required for the upper face of the chain cover 29, corresponding to its slack side. Thus employment of the insertion type chain cover 29 simplifies its operation and facilitates its maintenance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacker crane which moves back and forth along a rail, moves a lift table equipped with a slide fork up and down along a front mast and a rear mast, and handles loads stored in a rack. Regarding the drive mechanism.

[0002]

2. Description of the Related Art Conventionally, a technique relating to an automatic warehouse system constructed by combining a stacker crane and a rack type storage device has been publicly known. Further, in the stacker crane, a technique of transmitting the rotation of a lifting motor to a lifting frame by a chain that is pulleyed to raise and lower the lifting frame is also known.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a drive mechanism for a stacker crane that prevents the chain supported by a traveling body traveling on a lower traveling rail from hanging down. The chain for elevating the elevating frame of the stacker crane is reciprocally stretched over the distance to the highest position, which is a very long chain. Also, since the heavy object placed on the elevating frame is moved up and down, it is very easy for the chain to stretch. The extended portion is slack on the loose side that passes through the traveling body portion, and slides on the traveling rail. The chain cover for receiving this slack is a part that is frequently inspected and repaired, and is required to be easily attached and detached and easy to operate. The present invention relates to a support mechanism for the chain cover 29 that satisfies this requirement.

[0004]

The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be described. That is, in order to raise and lower the elevating frame of the stacker crane, the chain wound between the elevating motor and the elevating frame is provided with a chain cover that prevents the chain from coming into contact with the traveling rail in a hanging state. It can be inserted and removed in the insertion groove provided on the inner surface.

[0005]

[Operation] Next, the operation will be described. The chains 31 and 32 are
It is a chain of a length that reciprocates from the lifting motor 28 to the highest position, and since it lifts a heavy load, it is easy to stretch. In this case, for example, the operator removes the chain cover 29, removes the links of the chains 31 and 32, removes the links of the chains, and connects the shortened chains again after the elevating frame 1 is at the lowest position. It is necessary to remove the chain cover 29 each time such chain maintenance is performed, and since the chain cover 29 is an insertable type like the present invention, it can be easily attached and detached.

[0006]

EXAMPLES Next, examples will be described. 1 is a side view of the stacker crane, FIG. 2 is a perspective view of a traveling body 8, a traveling motor 27, a front mast support plate 43, and a rear mast support plate 44, and FIG. 3 is a chain passing position in the traveling body 8. FIG. 4 is a side view of the chain cover 29 and the bearing support side walls 30L and 30R, FIG. 5 is a plan view of the bearing support side walls 30L and 30R and the chain cover 29, and FIG. 6 is a chain cover 29 and the bearing support. Side wall 30L
FIG. 7 is a side view of the bearing support side wall 30, FIG. 8 is a plan view of the chain cover 29, and FIG. 9 is a side view of the chain cover 29.

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 can be stored in a desired rack position by the slide fork of the stacker crane, and the load can be taken out when necessary. The stacker crane is operated by switches on the ground control panel C, a card reader, or a host CP.
An operation signal is issued from U, and an electromagnetic switch or the like in the onboard control panel A that receives the operation signal is actuated to drive the lifting drive motor, the travel drive motor, or the like. Further, manual operation on the ground by the ground operation panel C is possible, and if a manual controller is attached to the onboard control panel A, manual operation on the aircraft 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 traveling body 8 moves back and forth on a traveling rail. The traveling on the traveling rail is performed by a traveling motor arranged inside the drive unit B. Further, the elevating frame 1 is moved up and down between the front mast 11 and the rear mast 12 by an elevating motor and a 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 boarding step 24 is arranged integrally with the onboard control panel A.

Next, the positional relationship among the traveling body 8, the chains 31 and 32, and the lifting motor 28 will be described with reference to FIGS. 2 and 3.
The traveling body 8 is composed of left and right corner channels 8L and 8R, a space is formed between the both corner channels 8L and 8R, and chains 31 and 32 are arranged in the space. A front mast support plate 43 and a rear mast support plate 44 are fixed to the front and rear ends of the traveling body 8. The front mast 11 is erected on the front mast support plate 43 and the rear mast support plate 44 is mounted on the rear mast support plate 44. 12 are erected. Further, a motor support base 47 is arranged at a position outside the front mast support plate 43, and the lifting motor 28 is supported on the motor support base 47.

A control board support base 46 is arranged outside the rear mast support board 44, and the control board support base 46 is provided.
A control board A is mounted on top of. A drive wheel 45 driven by the traveling motor 27 via a bevel gear box is disposed below the motor support 47, and a driven wheel 46 not driven by the motor is provided below the control panel support 46. Are arranged. Both the drive wheel 45 and the driven wheel 46 are placed on the traveling rail 14 and rotate to obtain the driving force of the traveling body 8. Further, a square hole is opened at the center of the front mast support plate 43 and the rear mast support plate 44, and one of the chains 31 and 32 extends upward from the square hole.

In FIG. 3, a chain is wound around the sprocket of the lifting motor 28 around a large diameter sprocket provided on the shaft of the drive sprocket 39, and the drive sprockets 39 and 40 are driven. The sprocket 39 is wound around the side of the rear mast 12 to drive the chain 31, and the sprocket 40 drives a chain 32 around the side of the front mast 11. The chains 31 and 32 on the side where the lifting frame 1 is lifted from the upper frame 7 arranged on the upper side are the front mast 1
1 passes through the inside of the upper frame 1 and ascends, and is connected to the front lift guide 6 and the rear lift guide 5 via pulley sheaves provided on the upper frame 7.

The other ends of the chains 31 and 32 are connected below the rear elevating guide 5 and the front elevating guide 6.
The chain on the lower side of the slack is wound around the sprockets 49, 48, 33 and 34 in the portion of the traveling body 8. In addition, the chain on the drive side has sprockets 35 and 36.
It is wound around. This will be described with reference to FIGS. 4, 5, and 6. A sprocket pivot shaft 51 that pivotally supports the sprockets 35 and 36 and a sprocket pivot shaft 50 that pivotally supports the sprockets 33 and 34 are shown. Left and right ends of the sprocket pivot shafts 50, 51 are fixed to bearing support side walls 30L, 30R fixed by a box 52 below the motor support base 47.

A chain cover 2 which constitutes an essential part of the present invention
9 is configured to be insertable from the front side into the inside of the insertion grooves 30a and 30b provided in the left and right bearing support side walls 30L and 30R. The bearing support side walls 30L, 30
It is necessary for R to support the load applied from the chain through the sprocket pivot shafts 50 and 51, and since a strong and thick component such as a forged product is used, the inside of the chain cover 29 Insertion groove 30a for inserting
It is easy to construct 30b. A retaining metal fitting 37, which prevents the chain cover 29 from being pulled out while the chain cover 29 is inserted into the insertion grooves 30a and 30b, is projected from the square channel 8L, and the chain cover 29 is fixed to the retaining metal fitting 37 by a fixing bolt 38. is doing.

FIG. 7 shows the shape of the bearing support side walls 30L and 30R. The bearing support side walls 30L and 30R are provided with a cutout space below, and the left and right bearing support side walls 3 are formed.
Even if dust or grease collects between 0L and 30R, it can be removed from the side. Then, the insertion groove 3 is crossed below the bearing support side walls 30L and 30R that are cut off.
0a and 30b are drilled. As shown in FIGS. 8 and 9, the chain cover 29 is also made of a thick plate,
The chains 31 and 32 are configured to have a thickness such that no holes are formed immediately by sliding on the top surface.

[0015]

Since the present invention is constructed as described above, it has the following effects. That is, since the chains 31 and 32 are long so as to reciprocate from the lifting motor 28 to the highest position of the lifting frame 1, the amount of extension is large and the chains are greatly loosened on the upper surface of the chain cover 29 corresponding to the slack side. . The chain cover 29 is a part that is particularly required to be inspected and repaired and is frequently detached. However, like the present invention, the chain cover 29 can be attached and detached to the bearing supporting side walls 30L and 30R. As a result, the chain cover 29 can be easily attached and detached, and the chain can be easily maintained.

[Brief description of drawings]

FIG. 1 is a side view of a stacker crane.

FIG. 2 is a perspective view of a traveling body 8, a traveling motor 27, a front mast support plate 43, and a rear mast support plate 44.

FIG. 3 is a drawing showing a passing position of a chain in a traveling body 8.

FIG. 4 is a chain cover 29 and a bearing support side wall 30L / 3.
The side view of the part of 0R.

FIG. 5 is a plan view of bearing support side walls 30L and 30R and a chain cover 29.

FIG. 6 is a chain cover 29 and a bearing support side wall 30L / 3.
The front view of the 0R part.

FIG. 7 is a side view of the bearing support side wall 30.

FIG. 8 is a plan view of the chain cover 29.

9 is a side view of the chain cover 29. FIG.

[Explanation of symbols]

 A On-board control panel C Ground control panel 8 Traveling body 27 Traveling motor 28 Elevating motor 29 Chain cover 30 Bearing support side wall 30a, 30b Insertion groove 31, 32 Chain

Claims (1)

[Claims] 1. A chain cover for preventing a chain wound between an elevating motor and an elevating frame in order to raise and lower an elevating frame of a stacker crane from coming into contact with a running rail in a hanging state. A drive mechanism for a stacker crane, which can be inserted and removed into and from the insertion grooves provided on the inner surfaces of both side walls of the stacker crane.