JP3707158B2 - Storage fall prevention device for storage shelf - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for preventing stored items from falling during an earthquake in a storage shelf such as a three-dimensional rack in an automatic warehouse or the like.
[0002]
[Prior art]
As an example of a warehouse, there is an automatic warehouse that has a high-rise three-dimensional rack inside and manages storage of stored items by a computer. Specifically, in this automatic warehouse, for example, as shown in FIG. 5, storage items 18 are put into and out of the three-dimensional rack 16 by a stacker crane 14 that runs on rails 12 laid in the warehouse 10.
[0003]
The stacker crane 14 includes a fork device, a lifting device, and a traveling device for lifting and transporting stored items. The stacker crane 14 is controlled by a computer or the like provided in a control room 20 installed at a location away from the warehouse 10. Remotely controlled by the device.
[0004]
Further, as shown in FIG. 6, the three-dimensional rack 16 is a high-rise storage shelf that is assembled by connecting the columns 22 with a horizontal member 24 such as a column connection material, and the storage items 18 are placed on the columns 22. A load receiving shelf 28 for supporting the pallet 26 is arranged in a plurality of stages at predetermined intervals in the vertical direction. The stored item 18 is placed on the pallet 26 and is carried in, out, and stored.
[0005]
According to the automatic warehouse 10 described above, since the storage 18 is stored at a high level, the site area required for storage can be reduced, and the storage and storage of the storage 18 can be managed by a computer, so inventory management becomes easy and storage is possible. Since management of the item 18 can be performed at a location away from the warehouse 10, it is particularly advantageous when storing dangerous items.
[0006]
In the automatic warehouse 10, conventionally, in order to prevent the stored items from collapsing due to a vibration such as an earthquake, a stopper for preventing the pallet 26 from dropping is provided on the receiving rack 28 of the three-dimensional rack 16. Yes.
[0007]
[Problems to be solved by the invention]
However, in the above-described three-dimensional rack 16, the stored item 18 is simply placed on the pallet 26, so that when the three-dimensional rack 16 vibrates due to the occurrence of an earthquake, the movement of the pallet 26 is prevented by a stopper. Even if it was obtained, there was a possibility that the stored item 18 would fall from the pallet 26.
[0008]
The present invention has been made in view of the above-described problems, and prevents a stored item from collapsing from a storage shelf when an earthquake occurs without deteriorating the workability of storage and retrieval of the stored item. It is an object of the present invention to provide a stored item fall prevention device that can be used.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, in the storage item fall prevention device of the storage shelf according to the first aspect of the present invention, a storage shelf having an opening on the front side for horizontally putting in and out the storage item, and an opening side portion of the storage shelf. A blocking bar that is pivotally supported along the opening surface with one end pivotally supported at a substantially central portion in the vertical direction, a weight body that is vertically movable on the back surface of the storage shelf, A weight body is connected to the blocking bar, converts the lifting movement of the weight body into a rotational movement of the blocking bar, and transmits the blocking bar in the vertical direction at the rising position of the weight body. A link mechanism for opening the opening by positioning and blocking the opening by horizontally positioning the blocking bar at the lowered position of the weight body, and holding the weight body at the raised position at normal times, and having a predetermined seismic intensity Operation control means for releasing and lowering the weight when sensing the above vibrations. Characterized in that was.
[0010]
In the stored item fall prevention device of the storage shelf described above, in a normal state, the blocking bar is positioned vertically on the side of the opening to open the opening, so that the stored item can be taken in and out through the opening. Then, when an earthquake or the like occurs, the operation control means senses the vibration and lowers the weight body, and with this lowering, the blocking bar is rotated to be positioned laterally at the approximate center of the opening to open the opening. It can block | block and it can prevent that the stored item in a storage shelf tries to jump out of opening by vibration.
[0011]
According to a second aspect of the storage shelf fall prevention device of the first aspect of the present invention, in the first aspect, the openings are arranged in a plurality of stages in the vertical direction, and the blocking bars are arranged corresponding to the openings. In addition, each blocking bar is connected to a common weight body provided on the back of the storage shelf via a link mechanism. Then, the respective blocking bars are collectively operated by a common weight body.
[0012]
According to a third aspect of the storage shelf fall prevention device of the third aspect of the present invention, in the second aspect of the present invention, the weight body is a lifting rod arranged vertically movable along the vertical direction at the center of the rear surface of the storage shelf. The blocking bars are provided on a pair of left and right sides of the opening and are provided as a pair, and the weight bar is a lifting rod extending in the vertical direction, so that it is provided in multiple stages up and down. This makes it easy to share the weight between the blocking bars of each opening, and divides the blocking bar of each opening into two, so that the link mechanism connected to each blocking bar can be reduced in weight and size. Easy installation on the shelf.
[0013]
According to a fourth aspect of the present invention, there is provided the storage shelf drop preventing device according to the third aspect, wherein the operation control means includes a chuck for detachably holding the upper end of the elevating rod, and a drive mechanism for the chuck. A seismometer that senses vibration and a control device that releases the drive mechanism when the output of the seismometer exceeds a predetermined value. When the vibration occurs, the lifting rod is released, and the lifting rod is dropped by its own weight to perform the above-described shielding operation, thereby ensuring a reliable response to the earthquake.
[0014]
In the storage shelf fall prevention device of the invention according to claim 5, in the invention according to claim 3 or 4, the link mechanism is provided to be supported in a freely rotating manner extending in the front and rear sides on the left and right sides of the opening, A rotation center shaft in which the blocking bar is integrally attached to the front end portion, and a guide that is integrally provided so as to protrude laterally from the lifting rod and has a long hole-shaped guide hole formed along the longitudinal direction. A bar and a link rod having one end slidably connected to a guide hole of the guide bar via a guide pin and the other end integrally fixed to the rotation center axis. Therefore, the mechanism can be configured in a small and simple manner, and can be easily incorporated into the storage shelf, and a reliable shielding operation can be obtained.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Since the basic configurations of the automatic warehouse and the three-dimensional rack are the same as or similar to those of the prior art, the same or similar portions are denoted by the same reference numerals and will be described with reference to the conventional drawings.
[0016]
FIG. 1 shows an overall configuration when the stored item fall prevention device 30 according to the present invention is employed in a three-dimensional rack 16, and FIGS. 2 to 4 are rear views showing a part of the three-dimensional rack 16 in an enlarged manner. It is a figure, a top view, and a front view, (a) of FIGS. 2-4 each shows a normal state, (b) has shown the operation state.
[0017]
The automatic warehouse 10 stores dangerous goods and the like stacked and stored. As in the prior art, the storage 18 is transferred to and from the three-dimensional rack 16 by a stacker crane that runs on rails 12 laid in the warehouse. 14.
[0018]
The three-dimensional rack 16 is a high-rise storage shelf that is assembled by connecting a large number of support columns 22 with a horizontal member 24 such as a column connection material. In the example, load receiving shelves 28 for supporting a pallet 26 on which four drums 18 are placed are arranged in a plurality of stages at predetermined intervals in the vertical direction, and a multi-stage / multi-row storage space A is formed vertically and horizontally. ing.
[0019]
Note that the drum 18 is put into and out of the three-dimensional rack 16 through the front opening 16a of the three-dimensional rack 16 shown in the upper part shown in FIG. 3 and the front shown in FIG.
[0020]
As shown in FIG. 1 as a whole, the stored item fall prevention device 30 has a lifting and lowering rod 32 that also serves as a weight and is supported by a bearing so that it can be moved up and down through the center of the back of each storage space A in the vertical direction. The lifting rod 32 is controlled in its lifting operation by the operation control means. The operation control means includes a chuck 34 that detachably holds the upper end of the elevating rod 32 and suspends and supports the upper end of the elevating rod 32 at a raised position, a drive mechanism 36 that opens and closes the chuck 34, and the elevating rod 32. A return cylinder 38 also serving as a shock absorber disposed opposite to the lower end, a limit switch 40 in the vicinity of the return cylinder 38 and detecting a drop of the lifting rod 32 and an appropriate position in the warehouse 10; And a seismometer 42 that detects an earthquake having a predetermined seismic intensity or more. Among these, the drive mechanism 36, the return cylinder 38, the limit switch 40, and the seismometer 42 are connected to a control device 44 provided in the control room 20 that is remote from the automatic warehouse 10.
[0021]
The elevating rod 32 is slidably supported by a bearing portion 24a provided on the back side horizontal member 24, and a pair of guide bars for each storage space A is shown on the left and right sides of the elevating rod 32 in an enlarged manner in FIG. 48 are provided integrally projecting left and right, and a flat link rod 50 is connected to each guide bar 48.
[0022]
A long guide hole 54 is formed along the longitudinal direction of the guide bar 48, and one end of each link rod 50 is slidably connected to the guide hole 54 via a guide pin 55. Further, the other end of the link rod 50 is integrally fixed to a rotation center shaft 56 that is rotatably supported by a bearing portion 52 that is disposed substantially at the center in the vertical direction inside the column 22 of the storage space A. ing.
[0023]
Then, as shown in FIG. 6A, the link rod 50 has a bearing portion while the elevating rod 32 moves from the raised position in FIG. 5A to the fall position in FIG. The guide pin 55 is slid along the guide hole 54 with the rotation center shaft 56 supported by the shaft 52 as the center of rotation, and is displaced by 90 °.
[0024]
As shown in FIG. 3, the rotation center shaft 56 extends to the opening 16a side, and a front end portion is supported by a bearing portion 58 disposed inside the pair of support columns 22 on the opening surface side. As shown in FIGS. 3 and 4, a blocking bar 60 is integrally attached to the shaft end of each part so as to be rotatable along the opening surface.
[0025]
When the lifting rod 32 is in the raised position, that is, in a normal state, each blocking bar 60 is positioned in the vertical direction along the inner side of the column 22 as shown in FIGS. It is held in a posture, and the opening 16a is always open, so that stored items such as the drum can 18 can be put in and out.
[0026]
When the lifting rod 32 falls from this state, as shown in FIGS. 3 and 4 (b), the pair of blocking bars 60 are displaced by 90.degree. Therefore, the center of the opening 16a is blocked in a horizontal state to prevent the drum 18 from being displaced or dropped due to vibration.
[0027]
Next, the general operation of the prevention device 30 will be described. FIG. 1 shows an operation standby state in the normal state, and when an earthquake occurs from this state, the control device 44 releases the drive mechanism 36 in response to the input of a detection signal from the seismometer 42 to move the chuck 34. As a result, the lifting rod 32 falls due to its own weight, and the limit switch 40 detects this, thereby confirming that each blocking bar 60 has been blocked. In addition, the detection output of the limit switch 40 causes the stacker crane 14 to The operation stop is commanded, and as a result, the stacker crane 14 stops the traveling and the depositing / dispensing operation, and the state is maintained. Here, even when the lifting rod 32 falls due to a malfunction, the limit switch 40 detects the dropping of the lifting rod 32 and the operation of the stacker crane 14 is stopped.
[0028]
If the safety is confirmed by inspection of each part after the shaking is settled, the return cylinder 38 is extended by the control device 44 and driven up, and the lifting rod 32 is raised and the limit switch 40 is turned off. At the same time, the lifting rod 32 is re-supported by the chuck 34 and the return cylinder 38 is lowered again to the original standby position.
[0029]
The drive mechanism 36 may be a direct acting type that operates by directly receiving the detection output of the seismometer 42. In the description, the elevating rods 32 are individually operated for each storage space A arranged in a row. For example, if a plurality of elevating rods 32 are connected to each other by a horizontal connecting bar or the like, the plurality of storage spaces A arranged in a row are arranged. The opening can be shielded simultaneously.
[0030]
The link mechanism may be a rack and pinion type. In this case, the lifting rod is arranged in the vicinity along the back column, a rack gear is engraved on the side surface of the lifting rod, and the pinion gear meshes with the rack gear at the shaft end on the back side of the rotation center shaft. Should be fixed.
[0031]
【The invention's effect】
As described in detail above, according to the storage shelf fall prevention device of the storage shelf according to the present invention, the following various excellent effects can be obtained.
[0032]
(1) During normal times, the blocking bar is placed in a standing position along the both sides of the opening in the vertical position so that the opening is in an open state. When the operation control means senses the vibration, the weight body is lowered, and the blocking bar is rotated along with the lowering and is horizontally mounted along the horizontal direction at the center of the opening. It is possible to prevent the stored item from jumping out of the opening.
[0033]
(2) The openings are arranged in a plurality of stages above and below, and the blocking bars are arranged corresponding to the respective openings, and each blocking bar is linked to a common weight body provided on the back surface of the storage shelf. By connecting to each other through a mechanism, the blocking bars respectively arranged for the openings formed in a plurality of stages can be collectively operated by a common weight body (claim 2). .
[0034]
(3) By making the weight body a lifting rod extending along the vertical direction, it becomes easy to share the weight body between the blocking bars of each opening provided in multiple stages above and below, and By dividing the blocking bar into two, the link mechanism connected to each blocking bar can be reduced in weight and size, and can be easily incorporated into the storage shelf.
[0035]
(4) The operation control means includes a chuck for detachably holding the upper end of the elevating rod, a drive mechanism for the chuck, a seismometer for detecting vibration, and an output of the seismometer exceeding a predetermined value. The controller is configured to release the drive mechanism at the time, and the lifting rod is held in the raised position by the chuck, and when the vibration occurs, the lifting rod is released, so that the lifting rod is dropped by its own weight. Thus, by performing the above-described shielding operation, it is possible to ensure a reliable operation response to an earthquake (claim 4).
[0036]
(5) The link mechanism is rotatably provided on both left and right side portions of the opening and extends in the front-rear direction, and a guide that is elongated along the longitudinal direction integrally protruding sideways from the lifting rod. A guide bar having a hole and a link rod having one end slidably connected to the guide hole of the guide bar via a guide pin and the other end integrally fixed to the rotation center shaft Further, by attaching a blocking bar to the front shaft end of the link rod, it is possible to provide a small and simple mechanism that can be easily incorporated into the storage shelf and that can provide a reliable shielding operation. .
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory diagram showing an overall configuration of a three-dimensional rack provided with a stored item fall prevention device according to the present invention.
FIGS. 2A and 2B are main part rear views showing the normal state and FIG.
FIG. 3A is a plan view of the main part showing the normal state, and FIG.
FIGS. 4A and 4B are front views of the main part showing the normal state and FIG.
FIG. 5 is a perspective view showing a conventional automatic warehouse.
FIG. 6 is a perspective view showing a storage shelf installed in a conventional automatic warehouse.
[Explanation of symbols]
16 Three-dimensional rack (storage shelf)
16a Opening 18 Drum can (containment)
30 Fall prevention device 32 Lifting rod (weight)
34 Chuck (operation control means)
36 Drive mechanism (operation control means)
42 Seismometer (operation control means)
44 Control device (operation control means)
48 Guide bar (link mechanism)
50 Link rod (link mechanism)
56 Center axis of rotation (link mechanism)
60 Bar

Claims (5)

A storage shelf having an opening on the front side for horizontally putting in and out the storage;
A blocking bar that is pivotally supported along the opening surface with one end pivotally supported at substantially the center in the vertical direction of the opening side of the storage shelf;
A weight provided on the back of the storage shelf so as to be movable up and down in the vertical direction;
The weight body and the blocking bar are connected to each other, and the lifting and lowering movement of the weight body is converted into the rotational movement of the blocking bar and transmitted, and the blocking bar is vertically moved at the rising position of the weight body. A link mechanism that opens the opening by positioning the blocking bar in a lateral direction at a lowered position of the weight body, and blocks the opening.
An operation control means for holding the weight body in a normal position in a normal state, and releasing the weight body and lowering it when a vibration of a predetermined seismic intensity or more is detected;
A storage item fall prevention device for a storage shelf, comprising: The openings are arranged in a plurality of stages above and below, and the blocking bars are arranged corresponding to the openings, respectively, and each blocking bar is linked to a common weight body provided on the back surface of the storage shelf. The storage shelf fall prevention device for storage shelves according to claim 1, wherein the storage shelves are connected to each other via a cable. The weight is composed of an elevating rod disposed in the center of the back of the storage shelf so as to be vertically movable along the vertical direction, and the blocking bars are provided at a pair of left and right sides of the opening. The storage item fall prevention device for a storage shelf according to claim 2. The operation control means includes a chuck for detachably holding the upper end of the elevating rod, a driving mechanism for the chuck, a seismometer for detecting vibration, and an output of the seismometer when the output is greater than or equal to a predetermined value. 4. The stored item fall prevention device for a storage shelf according to claim 3, further comprising a control device for releasing the drive mechanism. The link mechanism is
A rotation center shaft that extends in the front and rear direction and is rotatably supported on both left and right sides of the opening, and the blocking bar is integrally attached to the front end portion;
A guide bar which is provided integrally with the lifting rod so as to protrude laterally, and has a long hole-shaped guide hole along the longitudinal direction;
A link rod having one end slidably connected to the guide hole of the guide bar via a guide pin and the other end integrally fixed to the rotation center axis;
The storage item fall prevention device for a storage shelf according to any one of claims 3 and 4, characterized by comprising:

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