JP2000351420A - Rotary shelf - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rotate article housing tools at a high speed without disturbing housed articles. SOLUTION: In a rotary shelf for rotating plural article housing tools 12 installed on an endless rotary body 14 along a horizontal circulating passage, a turning passage of the endless rotary body 14 is regulated by a guide 15 composed of plural curvatures formed with a circle as a basis, and a driving device of the endless rotary body 14 is arranged in a rectilinearly advancing passage of the endless rotary body 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating shelf which rotates along a horizontal circulation path, and in particular, can rotate an article storage device at a high speed without disturbing stored articles. It concerns a rotating shelf.

[0002]

2. Description of the Related Art As a conventional technique relating to a rotating shelf, a technique disclosed in Japanese Patent Application Laid-Open No. 1-162610 is known.

[0003] The prior art described in the above publication is described.
A plurality of storage boxes can be circulated on an elongated base, and an elliptical drive endless flexible body is drivably wound around a driving vehicle and a driven vehicle provided in a longitudinal direction of the base, respectively. A circular warehouse formed as a quadratic curve by providing arc-shaped guides on the prime mover and driven vehicle sides at both ends in the longitudinal direction.

[0004]

However, the above-mentioned prior art has the following problems.

That is, in the circulation type warehouse described in Japanese Patent Application Laid-Open No. 1-162610, the turning path of the driving endless flexible body (toothed belt, chain, etc.) is elliptical and not (true) circular. For this reason, there is a problem that there is no compatibility with a commonly manufactured rotating shelf having a circular swivel path.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to restrict a swirling path of an endless rotating body with a guide having a plurality of curvatures formed on the basis of a (true) circle so that stored articles are not disturbed. An object of the present invention is to provide a rotating shelf that can rotate a storage tool at a high speed.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a rotating shelf for rotating a plurality of article storage devices attached to an endless rotating body along a horizontal circulation path, wherein the turning path of the endless rotating body is a circle. The above object has been achieved by providing a rotating shelf characterized by being regulated by a guide having a plurality of curvatures formed basically.

Further, in a rotating shelf for rotating a plurality of article storage devices attached to an endless rotating body along a horizontal circulation path, a plurality of rotating paths of the endless rotating body are formed based on a circle. The above object has been achieved by providing a rotary shelf, wherein the rotary shelf is regulated by a guide having a curvature and the drive device of the endless rotating body is disposed in a straight path of the endless rotating body. Things.

Preferably, the guide is fixed, and is formed such that the curvature of the guide gradually increases from the straight path side of the endless rotating body toward the center of the turning path.

Further, the endless rotating body is an endless chain,
Preferably, the horizontal circulation path is oval.

Further, it is preferable that the driving devices are provided at a plurality of positions on the straight traveling path of the endless rotating body.

[0012]

Embodiments of the present invention will be described below.

FIG. 1 is a perspective view showing an embodiment of an article packing apparatus using a rotating shelf according to the present invention, and FIG. 2 is a schematic plan view of the rotating shelf shown in FIG. FIG. 3 is a schematic plan view of the revolving and moving unit of the rotary shelf shown in FIG. 2, and an article storage device (tray) is indicated by a virtual line. FIG. 4 is an enlarged view of the turning unit shown in FIG. 3, FIG. 5 is an explanatory view of the shape of the guide of the turning unit shown in FIG.
FIG. 7 is a sectional view of the turning movement unit of the rotary shelf shown in FIG. 2, and FIG.
(However, the shape of the tray mounting plate is another embodiment different from the embodiments shown in FIGS. 3, 4, and 6), and FIG. 8 is a view showing the linear moving portion of the rotary shelf shown in FIG. FIG. 9 is a cross-sectional view, FIG. 9 is a plan view of a driving device of the endless rotating body (however, the shape of the tray mounting plate is another embodiment different from the embodiments shown in FIGS. 3, 4, and 6), and FIG. 9, FIG. 11 is an enlarged view of a main part of FIG. 10, FIG. 12 is a cross-sectional view of the endless rotating body of another embodiment shown in FIGS. 9 to 11, FIG. 13 is a plan view of FIG. FIG. 14 is a schematic plan view of a turning unit of the rotating shelf shown in FIG. 9, FIG. 15 is a plan view of another embodiment in which a driving device for an endless rotating body is disposed in the turning unit, FIG.
FIG. 16 is an elevation view of FIG.

In these drawings, reference numeral 1 denotes a rotating shelf for rotating a plurality of article storage tools (trays) 12 attached to an endless rotating body (endless chain) 14 along a horizontal (oval) circulation path. 2, a transfer device disposed on the side of the linear moving portion of the rotating shelf 1; 3, a storage device disposed on the side of the linear moving portion of the rotating shelf 1, 4; Is a delivery conveyor arranged along the linear moving part of the rotating shelf 1, 5 is a carrying-out conveyor arranged along the linear moving part of the rotating shelf 1, and 6 is a carrying-out conveyor arranged along the linear moving part of the rotating shelf 1. The turning path C of the endless chain 14 is regulated by a guide 15 having a plurality of curvatures formed on the basis of a circle, and the driving device 16 of the endless chain 14 is
Four straight paths S are provided at a plurality of locations. The guide 15 is fixed, and is formed so that the curvature of the guide 15 increases stepwise from the straight path S side of the endless chain 14 toward the center of the turning path C. Thus, in the above-described method for packing goods by the packing equipment for goods, the goods G carried in through the carry-in conveyor 5 are stored one by one in the storage tray 12 of the rotating shelf 1 by the storage device 3 at the free location. When a shipment request (for example, information such as a shipment order for each shipping destination and its shipping type and quantity data) is determined, the article G is taken out from the storage tray 12 in advance, and The plurality of types (product types) of the taken out articles G are transferred and stored so as to be stored in the order of being delivered to the plurality of continuous loading trays 12 attached to the endless chain 14 by the transfer apparatus 2. It is made to do. Therefore, when the truck for shipment arrives, the goods G are already
Are loaded in the order in which they are delivered to the loading tray 12, so that the desired articles G can be delivered in the desired order in a very short time.

To explain each part in the above embodiment, the rotating shelf 1 is constituted by stacking a plurality of rotating shelves 11 at appropriate intervals (10 stages in the embodiment shown in FIG. 1). The unit 11 is supported such that a plurality of trays 12 attached at equal intervals to an endless chain 14 can travel (rotate) on a traveling rail 13 disposed along a horizontal elliptical circulation path. At the same time, the endless chain 14 is wound around a guide 15 fixedly installed on the turning movement sections at both ends and is stretched along the traveling rail 13,
When the endless chain 14 is rotated by the plurality of drive devices 16 that are operated in conjunction with each other, the rotating shelf unit 1 in another stage is rotated.
It is designed to be rotated independently of the position 1. Each of the rotating racks 11 is configured to rotate independently of the rotating racks 11 in the other stages, but the tray 12 may be appropriately mounted on one or a plurality of endless chains 14 that are operated synchronously. The rotating shelf 1 may be configured by fixing the rotating shelf 11 having a plurality of stages by fixing the rotating shelf 11 at a plurality of stages at intervals, and by stacking a plurality of sets (a plurality of stages) of the rotating shelf alone 11 having the plurality of stages. Further, the rotating shelf 1 may be configured by stacking a plurality of sets (a plurality of stages) of the rotating shelf unit 11 having one stage and the rotating shelf unit 11 having a plurality of stages. In addition, the rotating shelf 1 can be used only with the single-stage rotating shelf 11 without stacking the rotating shelf 11 alone.
May be configured.

The tray 12 has a bottom plate 121, side walls 122, a back wall 123, and the like. A chain mounting plate 124 mounted on the bottom plate 121 is fixed to a tray mounting plate 143 mounted on the endless chain 14. As a result, they are attached to the endless chain 14 at equal intervals. In addition, 125 is a pair of outer horizontal shaft rollers supported on the outer bottom surface of the bottom plate 121, and 126 is a back horizontal shaft roller supported on the back bottom surface of the bottom plate 121. An outer end portion of the bottom plate 121 is formed with a mountain-shaped projection 127, and an outer end portion 128 of the side wall 122 is expanded laterally.

Further, the traveling rail 13 is composed of the rotating shelf unit 11.
It comprises a pair of grooved rails 131 forming a linear moving part of the (tray 12) and a pair of plate-like rails 132 forming a turning part of the rotating shelf unit 11 (tray 12).

In the endless chain 14, a vertical shaft roller 142 for guiding is provided above and below a standard roller chain (for example, a transmission roller chain of "JIS B 180160") 141 at a predetermined interval (for example, 133.35 m).
m, 152.4 mm, and 133.35 mm repetition), and the width of the tray 12 (for example, 3
The tray mounting plate 143 is mounted so as to connect the upper portions of the vertical shaft rollers 142 mounted at a distance of 152.4 mm smaller than 65 mm). The endless chain 14 shown in FIG. 12 is an embodiment in which the length of the tray mounting plate 143 is larger than the width of the tray 12.

Further, a guide 15 fixedly installed on the turning and moving portion of the rotating shelf unit 11 (tray 12) restricts the turning path C of the endless chain 14 (FIG. 5).
, The curved portion shown by a solid line) has a plurality of curvatures in a plan view, and the curvature of the regulating portion gradually increases from the straight path S side of the endless chain 14 toward the center of the turning path C. (The radius of curvature gradually decreases). For example, when the turning path C is formed on the basis of a circle (along the circle) and the radius of the circle is 400 mm (see FIG. 5), the turning path C from the straight path S of the endless chain 14 is used. On the circumference of a circle having a radius of 400 mm toward the center of the circle, a point having a central angle of 0 ° is a, a point 22.5 ° is b, a point 45 ° is c, and a point 67.5 ° is d. , A 90 ° point as e, an arc of 1600 mm radius (curvature) passing point a and point b, point b and point c
(Curvature) arc with a radius of 800 mm passing through points c and d (curvature), arc with a radius of 400 mm passing through points d and e (curvature) A part of the base circle) and a straight path S around the point a (curvature)
An arc having a radius of 200 mm in contact with an arc having a radius of 1600 mm, a radius 20 in contact with an arc having a (curvature) radius of 1600 mm and an arc having a (curvature) radius of 800 mm around point b.
0 mm arc, radius (curvature) around point c 800
mm and a (curvature) arc having a radius of 200 mm that are in contact with an arc having a radius of 530 mm (7).
A half of the restricting portion of the guide 15 is formed by a combination of the arcs having the radiuses of (i) and the restricting portion for the central angle of 90 ° to 180 ° is formed symmetrically with the restricting portion for the central angle of 0 ° to 90 °. Have been. That is, the regulating portion of the guide 15
In order to smoothly connect the respective arcs whose curvature radii gradually decrease, they are connected by a short arc having a radius of 200 mm. In effect, the curvature radius of the restricting portion of the guide 15 is:
From the straight path S side of the endless chain 14 toward the center of the turning path C, 1600 mm, 800 mm, 530 m
m and 400 mm (the curvature gradually increases). The upper and lower guides 15 are provided with two upper and lower guides 15 each having the above-described restricting portion.
4 and the regulating portion of the lower guide 15 is disposed at a height in contact with the lower vertical shaft roller 142 of the endless chain 14. The upper and lower vertical shaft rollers 142 are regulated so as to be swiveled along the regulating portions of the upper and lower two guides 15, respectively, and the standard roller chain 141 of the endless chain 14 is moved as shown in FIG. And a string connecting the adjacent vertical axis rollers 142 (a polygon having the vertical axis rollers 142 as corners) is formed, that is, a part of the standard roller chain 141 is formed by the upper guide 15 and the lower guide. The turning path C of the endless chain 14 is regulated by two upper and lower arcuate guides 15. In the embodiment shown in FIG. 4, a part of the standard roller chain 141 is composed of the upper guide 15 and the lower guide 15.
It is difficult to understand that the standard roller chain 141 is in the gap 151 between the guide 1 and the upper guide 1.
In the description of the embodiment (see FIG. 14) in which it is easy to understand that it is in the gap 151 between 5 and the lower guide 15,
This becomes clear.

FIG. 14 shows an embodiment in which the length of the tray mounting plate 143 of the endless chain 14 is larger than the width of the tray 12. The standard roller chain 141 of the endless chain 14 is adjacent to the vertical shaft roller 142. A string (with a length of 419.1 mm) connecting the vertical roller 142 to be formed (a polygon having the respective vertical axis roller 142 as a corner), that is, the standard roller chain 1
Most of 41 is regulated so as to be turned in a state where it enters the gap 151 between the upper guide 15 and the lower guide 15.

As shown in FIG. 2, the drive unit 16 is provided for each of the 29 endless chains 14 attached to the endless chain 14 at equal intervals.
Are arranged at a plurality of locations on the straight path S of the vehicle, and are operated in conjunction with each other.
The pair of drive sprockets 161 and one drive motor 162 arranged along the endless chain 14 make the standard roller chain 141 of the endless chain 14 into an oval circulation path. Are rotated in both forward and reverse directions. In addition, the tray 12, the endless chain 14,
The drive unit 16 and the like are unitized. For example, in the case of the rotating shelf 1 (the rotating shelf unit 11) in which 200 trays 12 are attached to the endless chain 14 with 50 trays 12 as one unit, four units are used. As a result, the four driving devices 1
6 may be provided at equal intervals.

FIGS. 15 and 16 show a driving device 16.
The drive device 17 is different from the standard roller chain 141 shown in FIG.
m) are arranged on the turning paths C at both ends of an endless chain 14 composed of a roller chain (not shown), and are operated in conjunction with each other.
Is formed so that the curvature of the regulating portion gradually increases from the straight traveling path S side of the endless chain 14 toward the center of the turning path C, and overlaps with the fixedly installed guide 15. The driving sprocket 171 provided,
Drive motor 172 for rotating drive sprocket 171
The center position where the endless chain 14 is wound around the drive sprocket 171 is the center of the turning path C of the endless chain 14 in plan view. Also,
The drive sprocket 171 has an endless chain 1 diameter.
(Curvature) of the guide 15 at the center of the turning path C of No. 4
What is necessary is just to select from the thing below twice the radius of 400 mm,
For example, even if the thickness is smaller than usual and the guide 15 is superposed thereon, the total of the thickness of the drive sprocket 171 and the thickness of the guide 15 can form the endless chain 14. It is smaller than the inner link width. Therefore, the endless chain 1
(Upper part of) the roller 144 that constitutes the roller chain of No. 4
Is regulated so as to be swung along the regulation portion of the guide 15 (the swirl path C of the endless chain 14 is regulated by the guide 15), and the driving sprocket 171 drives (the lower portion of) the roller 144 to thereby rotate the endless chain. 14 is rotated in both forward and reverse directions along an elliptical circulation path. Note that the drive device 17 may be provided only on one turning path C of the endless chain 14, and the other turning path C may be provided with only the guide 15 (or the guide 15 and the driven sprocket).

Further, the transfer device 2 of the article packing equipment using the rotating shelf 1 is provided with two
Two masts, an upper frame laid on its upper side, a lower frame laid down on its lower part, an elevating platform that moves up and down along the two masts, and a pair mounted on the elevating platform The pair of fork devices are configured so as to be independently retractable in the direction of the tray 12, and the articles G are taken out from the storage tray 12 and stored in the load alignment tray 12. It is made to do. The fork device is configured to be able to confront the rotating racks 11 of all stages by raising and lowering the lifting table.

Further, two storage devices 3 are arranged beside the linear moving portion of the rotary shelf 1, and, similarly to the transfer device 2, each of the storage devices 3 has two masts, and an upper frame provided on the upper side thereof. , A lower frame laid laterally below the lower frame, a lifting platform that moves up and down along two masts, a pair of fork devices mounted on the lifting platform, and the like. 12, it is configured to be able to move in and out in the direction of 12, and to take in the articles G from the storage station of the carry-in conveyor 5 and store them in the storage tray 12. The fork device is configured to be able to confront the rotating racks 11 of all stages by raising and lowering the lifting table.

Further, the retrieval device 4 is disposed on the side of the linear moving portion of the rotary shelf 1 and, similarly to the transfer device 2, has two masts, an upper frame provided on the upper side thereof,
It comprises a lower frame provided laterally below the lower frame, a lifting platform that moves up and down along two masts, a pair of fork devices mounted on the lifting platform, and the like. It is configured to be able to leave in the direction of
The articles G are taken out from the loading tray 12 and placed on the unloading station of the unloading conveyor 6. The fork device is moved from the bottom by 1
It is configured to be able to face the rotating shelf unit 11 at the third to third stages from the bottom.

The carry-in conveyor 5 is disposed along the linearly moving portion of the rotating shelf 1 and has a terminal portion and an intermediate portion.
It is a drive roller conveyor provided with two storage stations.

The unloading conveyor 6 is arranged along the linear moving portion of the rotary shelf 1 and has a starting end 62 composed of a driving roller conveyor having two unloading stations, a conveying section 63 composed of a horizontal driving roller conveyor, Start end 62 and transport section 6
The swing unit 64 is configured by a swing unit 64 or the like, which is a swing belt conveyor that connects the transfer unit 3 with the transfer unit 3. The end on the start end 62 side can be moved up and down following the elevation of the mounted start end 62.

According to the above-described method for packing goods by the packing equipment for goods, the goods G carried in through the carry-in conveyor 5 are stored by the storage device 3 into the storage tray 1 of the rotating shelf 1.
2 are stored in the free location one by one, and when a shipping request (for example, information such as a shipping sequence for each shipping destination and its shipping type and quantity data) is determined, a storage tray is stored in advance. 12, the articles G of a plurality of types (types) taken out are transferred and stored so as to be stored in the packing tray 12 by the transfer apparatus 2 in the order in which they are delivered. There is something. Therefore, when the shipping truck or the like arrives, the articles G are already unloaded in the order in which they are delivered to the unloading tray 12, so that the desired articles G are unloaded in the desired order in a very short time. be able to.

Next, with respect to the acceleration generated when the endless chain 14 moves from the straight path S to the turning path C, a reference example in the case where the turning path C of the endless chain 14 has a constant (curvature) radius will be described first. That is, as shown in FIG. 17, the rotation speed V0 of the endless chain 14 is 25 m.
/ Min, the radius of the turning path C is 400 mm, the interval P between the vertical shaft rollers 142 of the endless chain 14 is 140 mm (152.4 mm in the embodiment shown in FIG. 4 and the like), and the vertical shaft rollers 142 of the endless chain 14 and the tray. When the distance Ls to the outer end of the tray 12 is 550 mm, the rotation speed V1 of the outer end of the tray 12 in the straight path S is 25.
m / min, and the rotation speed V2 of the outer end of the tray 12 in the turning path C is 59.4 m / min. The time t required for the pair of vertical shaft rollers 142 attached at an interval P of 140 mm to move from the straight path S to the turning path C is 0.336 s. Therefore,
The acceleration α generated at the outer end of the tray 12 when the endless chain 14 moves from the straight path S to the turning path C is 0.17 times the gravity.

In contrast to the reference example in which the turning path C of the endless chain 14 has a constant curvature (radius), the center of the turning path C starts from the straight path S of the endless chain 14 like the rotating shelf 1 of the present invention. When the guide 15 is formed so that the curvature of the guide 15 increases stepwise (the radius of curvature decreases stepwise) toward the part side, as shown in FIG. Is 25 m / min, the (curvature) radius of the turning path C is 1600 mm, the interval P between the vertical shaft rollers 142 of the endless chain 14 is 140 mm (152.4 mm in the embodiment shown in FIG. 4 and the like), and the endless chain 14
When the distance Ls between the vertical axis roller 142 and the outer end of the tray 12 is 550 mm, the rotation speed V1 of the outer end of the tray 12 in the straight path S is 25 m / mi.
n, and the rotation speed V2 of the outer end of the tray 12 in the turning path C is 33.6 m / min. Also, 14
A pair of vertical shaft rollers 1 attached at a distance P of 0 mm
The time t required for the 42 to transfer from the straight path S to the turning path C is 0.336 s. Therefore, the acceleration α generated at the outer end of the tray 12 when the endless chain 14 moves from the straight path S to the turning path C is 0.0
The value is quadrupled.

As shown in FIG. 19, when the rotation speed V0 of the endless chain 14 is 25 m / min and the (curvature) radius of the turning path C is from 1600 mm to 800 mm, the (curvature) radius is 1600 mm. The rotation speed V2 of the outer end of the tray 12 in the path C is 33.6.
The rotation speed V3 of the outer end of the tray 12 in the swirl path C having a radius of curvature of 800 mm / min.
2.2 m / min, and a pair of vertical shaft rollers 142 attached at an interval P of 140 mm have a (curvature) radius of 1
Radius (curvature) radius is 800 from turning path C of 600 mm
Since the time t required to transfer to the turning path C of 0.3 mm is 0.336 s, the acceleration generated at the outer end portion of the tray 12 when the (curvature) radius of the turning path C changes from 1600 mm to 800 mm. α is 0.04 times the value of gravity.

Therefore, as in the rotating shelf 1 of the present invention, the curvature of the regulating portion of the guide 15 gradually increases from the straight path S side of the endless chain 14 toward the center of the turning path C (the radius of curvature is increased). In this case, the articles G stored in the tray 12 are smaller than in the reference example in which the turning path C of the endless chain 14 has a constant (curvature) radius. Bottom plate 121 of tray 12
It is possible to prevent the transfer device 2 or the like from inclining (rotating) with respect to the retreating direction (of the fork device) by sliding upward. The rotation speed V0 of the endless chain 14 is 25 m / min.
Even if the speed is increased from 50 m / min to 50 m / min, the acceleration α generated at the outer end of the tray 12 is 0.17 times the gravity, that is, the turning path C of the endless chain 14 shown in FIG. 17 has a constant (curvature) radius. In some reference examples, the endless chain 14
When the rotation speed V0 of the tray 1 is 25 m / min.
2 is the same as the value of the acceleration α generated at the outer end of the tray 12, the articles G stored in the tray 12
1. Sliding on the transfer device 2 etc. (of the fork device)
It is possible to achieve high-speed rotation of the rotating shelf 1 without increasing the amount of tilt (rotation) with respect to the moving direction.

Although the embodiments of the present invention have been described with the embodiments of the article packing equipment using the rotating shelf of the present invention, the rotating shelf of the present invention is not limited to these. For example, the regulating portion of the guide 15 having a plurality of curvatures may be formed by a groove without being formed on the side surface.

The vertical shaft roller 142 for guiding the endless chain 14 may be attached to only one of the upper and lower sides of the standard roller chain 141.

Further, a linear motor may be used as the driving device 16.

[0036]

As described above, the rotating shelf of the present invention can rotate the article storage device at a high speed without disturbing the stored articles.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of an article packing apparatus using a rotating shelf according to the present invention.

FIG. 2 is a schematic plan view of the rotating shelf shown in FIG. 1 (however, the number of attached article storage devices is different).

FIG. 3 is a schematic plan view of a turning unit of the rotating shelf shown in FIG. 2, in which an article storage device (tray) is indicated by a virtual line.

FIG. 4 is an enlarged view of the turning movement unit shown in FIG. 3;

FIG. 5 is an explanatory diagram of a shape of a guide of the turning movement unit shown in FIG. 4;

FIG. 6 is a cross-sectional view of a turning moving unit of the rotating shelf shown in FIG.

7 is an enlarged view of a main part of FIG. 6 (however, another embodiment in which the shape of a tray mounting plate is different from the embodiments shown in FIGS. 3, 4, and 6).

FIG. 8 is a sectional view of a linear moving portion of the rotating shelf shown in FIG. 2;

FIG. 9 is a plan view of a drive device of the endless rotating body (however, another embodiment in which the shape of a tray mounting plate is different from the embodiments shown in FIGS. 3, 4, and 6).

FIG. 10 is a side (cross-sectional) view of FIG. 9;

FIG. 11 is an enlarged view of a main part of FIG. 10;

FIG. 12 is a sectional view of the endless rotating body of another embodiment shown in FIGS. 9 to 11;

FIG. 13 is a plan view of FIG.

FIG. 14 is a schematic plan view of a turning unit of the rotating shelf shown in FIG. 9;

FIG. 15 is a plan view of another embodiment in which the driving device for the endless rotating body is disposed in the turning movement unit.

FIG. 16 is an elevation view of FIG.

FIG. 17 is an explanatory diagram of acceleration generated when the endless chain moves from a straight path to a turning path, and is a reference example in the case where the turning path has a constant (curvature) radius.

FIG. 18 is an explanatory diagram of acceleration generated when the endless chain moves from the straight path to the turning path, and is formed so that the curvature of the guide gradually increases from the straight path to the center of the turning path. This is an embodiment in the case where the operation is performed.

FIG. 19 is an explanatory diagram of acceleration generated when the endless chain moves from a turning path having a (curvature) radius of 1600 mm to a turning path having a (curvature) radius of 800 mm, and is guided from the straight path toward the center of the turning path. Is an embodiment in which the curvature is formed so as to increase gradually.

[Explanation of symbols]

 Reference Signs List 1 rotating shelf 12 article storage device (tray) 14 endless rotating body (endless chain) 15 guide 16 drive device 17 drive device C turning path S straight path

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tatsuo Yamane 3-1, Higashi 3-chome Station, Koga-shi, Fukuoka F-term (reference) 3F022 FF34 MM13 MM51

Claims (5)

[Claims] 1. A rotating shelf for rotating a plurality of article storage devices attached to an endless rotating body along a horizontal circulation path, wherein the endless rotating body has a plurality of rotating paths formed based on a circle. A rotating shelf that is regulated by a guide having a curvature. 2. A rotating shelf for rotating a plurality of article storage tools attached to an endless rotating body along a horizontal circulation path, wherein a plurality of rotating paths of the endless rotating body are formed based on a circle. A rotating shelf, which is regulated by a guide having a curvature, and wherein the drive device for the endless rotating body is disposed on a straight path of the endless rotating body. 3. The guide according to claim 1, wherein the guide is fixed, and the curvature of the guide gradually increases from the straight path side of the endless rotating body toward the center of the turning path. Item 4. The rotating shelf according to Item 2. 4. The rotating shelf according to claim 1, wherein the endless rotating body is an endless chain, and the horizontal circulation path is an oval. 5. The rotating shelf according to claim 2, wherein the driving device is disposed at a plurality of positions on a straight traveling path of the endless rotating body.