JPH08225111A - Stacker crane - Google Patents

Abstract

PURPOSE: To provide a stacker crane, by which noise produced from the mast part at the time of traveling can be decreased without increasing the weight of the mast. CONSTITUTION: A main mast 20 and a reinforcing mast 23 are formed by connecting plural main mast components 21 and reinforcing mast components 24 to each other in the direction of height. The insides of the main mast components 21 and the reinforcing mast components are hollow, and the insides of the lowermost components 21, 24 are filled with urethane foam 5. The urethane foam 53 is filled by injecting the urethane foam from filler injection ports 41, 44 provided at designated spaces in the direction of height on each one side wall of the lowermost main mast component 21 and reinforcing mast component 24. Thus, the propagation of vibration generated by a motor 50 for traveling drive and a motor 52 for elevating drive which are disposed near the lower end of a mast 15 in the traveling truck 14 and on the side of the mast a little above the traveling truck 14 can be suppressed by the urethane foam 53.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacker crane equipped with a lifting platform that moves up and down along a mast.

[0002]

2. Description of the Related Art Conventionally, there is known an automatic warehouse including a rack device and a stacker crane. In this automatic warehouse, the rack device is composed of a plurality of article storage shelves arranged vertically and horizontally, and a stacker crane travels while being guided by rails arranged along the longitudinal direction of the rack device. The stacker crane has a traveling carriage that travels on rails on the ground, a mast that is erected on the traveling carriage and that is substantially up to the upper end height of the rack device, and an elevating platform that can move up and down along the mast. The elevating table has a horizontally projecting slide fork, and after the slide fork faces a predetermined article storage shelf by traveling of the traveling carriage and elevating the elevating table, the article storage shelf is operated by projecting and retracting. Delivery of goods to and from. Such a stacker crane has a motor as a drive source of a traveling drive system of a traveling carriage and a lifting drive system of an elevator. For example, the motor for the traveling drive system is provided on the traveling vehicle, and the motor for the lifting drive system is provided on the side of the mast above the traveling vehicle.

[0003]

In the conventional stacker crane, the inside of the mast body is hollow in order to reduce the weight of the device. Therefore, the vibration generated by the motor, which is the drive source, during traveling or up and down is easily propagated to the mast, and the vibration range becomes wide, so that the total sum of the sounds generated by the vibration increases and becomes a large noise. In order to weaken the propagation from the vibration source, it is conceivable to reduce the cross-sectional area of the hollow part inside the mast body, that is, to increase the thickness of the mast body side wall, but in this case, the weight of the mast increases. Therefore, the weight of the entire device is increased. The increase in the weight of the entire device causes inconveniences such as hindering high-speed traveling of the stacker crane.

The present invention has been made in view of the above problems, and an object thereof is to increase the weight of a mast without increasing the weight of the mast.
An object of the present invention is to provide a stacker crane that can reduce noise generated from the mast portion during traveling or when moving up and down.

[0005]

In order to achieve the above object, the invention according to claim 1 is such that the inside of the mast body is hollow and at least the space inside the mast body near the vibration source is compared with the mast body. The stacker crane will be filled with a filler having a very low specific gravity.

According to a second aspect of the present invention, a plurality of filler injection ports are provided on the side surface of the mast body at predetermined intervals in the height direction.

According to a third aspect of the invention, the filler is a foamable resin.

[0008]

According to the present invention, since the inside of the mast body is hollow, the weight of the mast body is reduced, and at least the space inside the mast body near the vibration source is filled with a filler having a very small specific gravity as compared with the mast body. Since it is buried, the propagation of vibrations is suppressed by the filling material with almost no increase in the weight of the mast.

According to the second aspect of the present invention, the filler can be easily filled into the space inside the desired position of the mast body by injecting the filler from the plurality of filler inlets.

According to the third aspect of the invention, the space inside the mast body can be easily filled, and the propagation of vibration can be effectively suppressed by the bubbles.

[0011]

EXAMPLES Examples of the present invention will be described below with reference to the drawings, but the present invention is not limited to these examples without departing from the gist of the present invention. In this specification, the front means the lower side of FIG. 1, the rear means the upper side of FIG. 1, the left means the left side of FIG. 1, and the right means the right side of FIG.

A pair of front and rear rack devices 1 are erected on the floor so as to open the stacker crane passage 10.
The rack device 10 includes a large number of front columns 2 arranged at right and left at predetermined intervals, rear columns 2 arranged behind the front columns 2 with a predetermined space therebetween, and front and rear columns 2. It has a large number of article support members 4 provided at a predetermined interval in the height direction, and the article storage members 3 are constituted by the article support members 4 that face each other without the columns 2. A fork passage interval 5 is provided between the pair of left and right article support members 4 to allow the vertical movement of a slide fork 17, which will be described later. Incidentally, the loading / unloading port 6 of the article storage rack 3 is on the slide fork passage 10 side, that is, the loading / unloading ports 6 of the article storage racks 3 of the front and rear rack devices 1 face each other.

On the left side of the rack device 1, there is provided a loading / unloading roller conveyor 8 whose carrying direction is left and right. A known article elevator (not shown) is provided on the rack device 1 side of the loading / unloading roller conveyor 8. This article elevator is provided with a lift table that can be lifted and lowered by a known lift device below the rollers of the loading / unloading roller conveyor 8, and a pair of bearings that are erected on the lifting table and are located between the rollers of the loading / unloading roller conveyor 8. A frame, and by lifting the article W by the support frame, a fork insertion interval is formed between the transport surface of the loading / unloading roller conveyor 8 and the lower surface of the article W, or by the support frame in the raised position. The article W is received from the slide fork 17 and then lowered to move in and out the roller conveyor 8
It has the function of lowering the article W.

A pair of upper and lower guide rails 11 are arranged in the stacker crane passage 10 so that the longitudinal direction thereof is oriented in the left-right direction, and the stacker crane 13 is guided by these guide rails 11 so as to be movable left and right. The stacker crane 13 includes a traveling carriage 14, an elevating stand 16 which can be raised and lowered by a pair of masts 15 provided on the traveling carriage 14, and a horizontal movement in the front-rear direction by a well-known advancing and retracting mechanism of the elevating stand 16. It has a slide fork 17 movably provided. In the traveling carriage 14, the traveling drive motor 50 is arranged so as to be located near the lower end of the left mast 15, and the lower guide rail 1 is rotated by the rotation of the traveling drive motor 50.
The wheels 51 on the 1 rotate, the traveling carriage 14, that is,
The stacker crane 13 is guided by the guide rail 11 and travels left and right. Also, the traveling carriage 1 on the mast 15
The motor 52 for raising and lowering drive at a position slightly upward from 4
Are arranged, and the elevator table 16 is elevated by the rotation of the elevator drive motor 52. As is well known, the slide fork 17 performs operations of projecting the article W downward, lifting the article W by raising the elevating table 16 and retracting the article W to the elevating table 16 side to lift the article W.
The article W can be pulled down to 6 and the article W can be unloaded onto the article storage shelf 3 or the like by the reverse operation.

Each of the masts 15 has a main mast 2 formed by arranging a plurality of main mast constituent members 21 in the height direction.
0, and a reinforcing mast 23 in which a plurality of reinforcing mast components 24 are arranged in the height direction from the lowermost main mast component 21 to the uppermost main mast component 21. The connecting portion (butting portion) between the main mast components 21 and the connecting portion (butting portion) between the reinforcing mast components 24 are vertically displaced. The reinforcement mast 23 does not have to be provided over the entire main mast 20, and may be provided only in a portion of the main mast 20 that needs reinforcement. The lower ends of the main mast 20 and the reinforcing mast 23 are fixed to the traveling carriage 14 by known means (welding, bolting, etc.), and the upper ends thereof are fixed to the upper connecting member by known means. ing.

As shown in FIG. 3, the guide rollers 19 of the lifting table 16 are provided at the front and rear of the main mast component 21.
A guide rail 18 for guiding the is integrally formed.

The main mast forming member 21 and the reinforcing mast forming member 24 are abutted against each other by a meshing structure, and the main mast forming member 21 and the reinforcing mast forming member 24 are vertically laid across the main mast forming member 21 and the reinforcing mast forming member 24. They are connected to each other by a connecting plate 26 which is long and has an engagement edge protruding from the longitudinal edge. That is, the main mast component 21 and the connecting plate 26 are provided with a plurality of bolts 28 through the through holes formed in the connecting plate 26, and have a groove 22 extending in the up-down direction and having a retaining edge formed on the main mast component 21. The reinforcing mast component 24 and the connecting plate 26 are connected to the reinforcing mast component 24 through the through holes formed in the connecting plate 26. It is connected by being screwed into a nut 29 fitted in a vertically long groove 25 having a formed retaining edge. The connecting portions (butting portions) of the connecting plates 26 are displaced from the connecting portions of the main mast constituent members 21 and the reinforcing mast constituent members 24, so that the strength is further increased. That is,
The connecting portions of the main mast constituent members 21 and the connecting portions of the reinforcing mast constituent members 24 and the connecting portions of the connecting plates 26 are vertically displaced so as not to be aligned.

The vertically adjacent main mast components 21 are connected to each other by an inner connecting plate 31 and an outer connecting plate 32 which are laid across the main mast forming members 21. That is, a large number of bolts 28 are connected to each other by fitting them into the screw holes formed in the inner connecting plate 31 through the through holes formed in the outer connecting plate 32 and the main mast component 21.

The reinforcing mast constituents 24 that are vertically adjacent to each other straddle each other, and the reinforcing mast constituent 2 from inside and outside.
4, the connecting plates 33a, 33 are pressed against each other.
b and the connecting plates 34a, 34b are connected to each other. By fitting a large number of bolts 28 into the screw holes formed in the inner connecting plate 33b through the through holes formed in the outer connecting plate 33a and the reinforcing mast component 24,
Also, a large number of bolts 28 are screwed into screw holes formed in the inner connecting plate 34b through through holes formed in the outer connecting plate 34a and the reinforcing mast component 24, and further, a large number of bolts 28 are connected to the connecting plate 34a. The reinforcing mast components 24 are connected to each other by screwing the nuts 29 fitted in the vertically long grooves 25 having the retaining edges formed in the reinforcing mast components 24 through the through holes formed in the. There is. Inner connecting plate 33b and connecting plate 34b
Is the connecting plate 33 through the through hole of the reinforcement mast component 24.
By temporarily fitting a plurality of temporary fixing bolts 36 into the screw holes formed in b and the connecting plate 34b, the temporary fixing bolts 36 are temporarily fixed to the reinforcing mast component 24. A head relief hole is formed in the outer connecting plate 33a and the connecting plate 34a for releasing the bolt head of the temporary fixing bolt 36.

In the main mast 20 and the reinforcing mast 23, urethane foam 53 is filled inside the lowermost main mast forming member 21 and the reinforcing mast forming member 24. A plurality of filler injection ports 41, 44 are formed at predetermined intervals in the longitudinal direction on one side wall of the lowermost main mast component 21 and the reinforcing mast component 24.
Liquid urethane foam 5 from the filler inlets 41, 44
It can be filled inside by injecting 3. That is, the injected liquid urethane foam 53 is exposed to the air or, in the case of the two-liquid type, is contacted with the air while being mixed with another liquid.
It expands 40 times and solidifies, and is filled inside the main mast component 21 and the reinforcing mast component 24 without any gap. In addition, the time of injecting the urethane foam 53 may be before or after the connection between the main mast constituent members 21, the reinforcing mast constituent members 24, or the connection between the main mast constituent members 21 and the reinforcing mast constituent members 24.

As described above, the urethane foam 5 is provided inside the main mast component 21 and the reinforcing mast component 24 at the lowest position.
3 is filled because the traveling drive motor 50 and the lifting drive motor 52, which are vibration sources, are installed below or in the vicinity of the lower portion of the mast 15. The propagation to the is suppressed by the filled urethane foam 53. At least the interior of the lower portion of the main body of the mast 15 near the vibration source may be filled with the urethane foam 53, but if the entire interior is filled up to the upper end, the propagation of vibration to the mast 15 can be suppressed more reliably. it can.

In this embodiment, since the main mast 20 and the reinforcing mast 23 are formed by connecting a plurality of components 21 and 24 in the height direction, for example, the entire inside of the main body of the mast 15 from the lower end to the upper end. Even when the urethane foam 53 is filled, by filling the constituent materials 21 and 24 individually and then connecting them in the height direction, a large space is not required for the filling work, and the filling is performed at a high position. You don't have to do any work. Further, since the connecting portion of the main mast constituent member 21 and the connecting portion of the reinforcing mast constituent member 24 are vertically displaced, the strength of the mast 15 can be further increased, so that the side wall of the mast 15 main body can be made thinner and lighter. Can be realized.

The "mast body" in the claims corresponds to "main mast component 21 (main mast 20)" and / or "reinforcement mast component 24 (reinforcement mast 23)" in this embodiment. To do. That is, in this embodiment, urethane foam 53 is filled inside the main mast constituent member 21 and the reinforcing mast constituent member 24 at only the lowest position in both the left and right masts 15. ,
The main mast component 21 alone, the reinforcing mast component 24 alone, or only the left (closer to the vibration source) mast 15 main body may be inside.

The specific gravity of the urethane foam 53 is extremely lower than the specific gravity of the main mast component 21 and the reinforcing mast component 24. The filler is preferably one that can be easily filled and has a small specific gravity, but is not limited to the urethane foam used in this example.

[0025]

As described above, according to the first aspect of the invention, since the inside of the mast body is hollow, the weight of the mast body is reduced, and at least the space inside the mast body near the vibration source is smaller than that of the mast body. By filling with a filler with an extremely low specific gravity, the weight of the mast hardly increases, and the filler can suppress the propagation of vibrations to the mast, facilitating high-speed running of the stacker crane and removing the mast from the mast. The noise generated is reduced.

According to the second aspect of the present invention, the filler can be easily filled in a desired portion inside the mast body by injecting the filler from the plurality of filler injection ports.

According to the third aspect of the invention, the space inside the mast body can be easily filled, and the propagation of vibration can be effectively suppressed by the bubbles.

[Brief description of drawings]

FIG. 1 is a simplified plan view with an intermediate omitted, showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view along the line II-II of FIG.

FIG. 3 is an enlarged sectional view taken along line III-III of FIG.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is an enlarged sectional view taken along line VV of FIG. 2;

6 is an enlarged cross-sectional view taken along line VI-VI of FIG.

FIG. 7 is a front view schematically showing a connected state of a mast.

8 is a view taken along the line VIII-VIII of FIG.

FIG. 9 is a view taken on line IX-IX of FIG. 7;

FIG. 10 is a perspective view of the main mast component showing urethane foam injection.

[Explanation of symbols]

 15 mast 20 main mast 21 main mast constituent material 23 reinforcing mast 24 reinforcing mast constituent material 41, 44 filler injection port 53 foamed urethane

Claims (3)

[Claims] 1. The inside of the mast body is hollow, and
A stacker crane in which at least the space inside the mast body near the vibration source is filled with a filler material that has a significantly smaller specific gravity than the mast body. 2. The stacker crane according to claim 1, wherein a plurality of filler injection ports are provided on the side surface of the mast body at predetermined intervals in the height direction. 3. The stacker crane according to claim 1, wherein the filler is a foamable resin.