JP2007326686A - Article storing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an article storing device capable of simplifying a configuration of a ladder for inspection used for inspection work and facilitating the inspection work. <P>SOLUTION: This article storing device is provided with a storage shelf 12 provided with a plurality of article storing parts for storing articles while they are arranged in the vertical and horizontal directions, a stacker crane 14 for conveying articles capable of running freely on a passage 13 for moving formed along a front face of the storage shelf 12, the ladder 25 for inspection suspended and supported from/on a rail 18 for moving provided in an upper part of the passage 13 for moving to move freely along the longitudinal direction of the passage 13 for moving and formed at such vertical length that forms a space for moving of a worker on a downward side of the rail 18 for moving while the ladder 25 for inspection is suspended and supported from/on the rail 18 for moving, and a stepladder 26 to be freely connected with a lower part of the ladder for inspection while it comes into contact with a floor surface of the passage for moving. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a storage shelf provided with a plurality of article storage portions for storing articles in a state of being parallel in the vertical direction and the horizontal direction, and an article conveyance that can travel along a movement passage formed along the front surface of the storage shelf. The present invention relates to an article storage device provided with a stacker crane for use.

  This kind of article storage device is designed to store articles in a plurality of article storage units in a state in which articles can be carried in and out by a stacker crane. In such an article storage facility, For example, when an article stored in one of the article storage units collapses, or when an article collapses during the lifting operation of the stacker crane, the place to be inspected is determined by the operator's hand. When it is in a high position that does not reach it, it is necessary for the worker to ascend to a high position that should be inspected. Conventionally, in order to be able to perform such inspection work, the following is configured. there were.

  That is, when the place to be inspected is at a high position that is out of the reach of the worker, an inspection ladder is provided for the worker to ascend to the place to be inspected. The upper part of the stacker crane is suspended and supported by a moving rail provided along the moving direction of the stacker crane, and is formed to be long in the vertical direction so as to be substantially the same length as the vertical dimension of the storage shelf. There was something. And the ladder which prevents the movement of the lower part of the inspection ladder suspended and supported by the moving rail so that the operator can easily move the inspection ladder up and down by preventing the inspection ladder from swinging. The fixing means is provided in the inspection ladder (see, for example, Patent Document 1).

  In addition to the explanation, the ladder fixing means is provided in a lower part of the inspection ladder in a state in which a grounding body that is relatively movable up and down in a set range is biased upward and can be moved downward by operation of a stepping operation tool. By operating the stepping operation tool, the grounding body is lowered relative to the inspection ladder and is brought into contact with the floor surface, thereby preventing the inspection ladder from moving. The moving rail extends to the outside of the moving passage and is bent in a substantially L shape in plan view, and a standby moving position is set at the bent portion. When the inspection ladder is not used, the inspection ladder is moved to the standby movement position.

JP-A-1-158191

  In the conventional article storage device, the inspection ladder is formed long in the vertical direction from the position where the moving rail exists to a position close to the floor of the moving passage, so the inspection ladder becomes large and has a weight. Is a big one. As a result, when the inspection ladder that is suspended and supported by the moving rail is moved manually to perform the inspection work, the inspection ladder is heavy and requires a large operating force. There was a disadvantage that made it difficult to do.

  Further, in the conventional article storage apparatus, when performing the inspection work, when the inspection ladder is moved to the movement position for the inspection work, the posture of the worker is increased when the operator raises or lowers the inspection ladder. In order not to become unstable, it is necessary to provide the ladder fixing means as described above in the inspection ladder, which is disadvantageous in that the configuration of the inspection ladder is complicated and the cost is increased.

  An object of the present invention is to provide an article storage device that can simplify the configuration of an inspection ladder for performing an inspection operation and that can easily perform the inspection operation. is there.

  An article storage device according to the present invention includes a storage shelf including a plurality of article storage units that store articles in a state of being parallel in the vertical direction and the horizontal direction, and a movement passage formed along the front surface of the storage shelf. And a stacker crane for transporting goods, the first feature of which is the movement rail provided in the upper part of the movement passage along the longitudinal direction of the movement passage. An inspection ladder formed in a vertical length so that a space for moving an operator is formed on the lower side in a state of being suspended and supported movably and supported by the moving rail, A stepladder that can be connected to the lower part of the inspection ladder while being in contact with the floor of the moving passage is provided.

  According to the first characteristic configuration, an inspection ladder is provided which is suspended and supported by a movement rail provided at an upper portion of the movement passage along the longitudinal direction of the movement passage. The ladder is formed to have a vertical length so that an operator's moving space is formed on the lower side in a state where the ladder is suspended and supported by the moving rail. A stepladder that can be connected to the lower portion of the inspection ladder while being in contact with the floor of the moving passage is provided separately from the inspection ladder.

  When carrying out the inspection work, the operator moves the inspection ladder, which is suspended and supported by the moving rails, to the moving position for the inspection work along the longitudinal direction of the moving passage, and then the stepladder. Is placed on the floor side of the moving passage while being positioned below the inspection ladder, and the stepladder and the lower part of the inspection ladder are connected. At this time, the stepladder is stably grounded and supported on the floor of the moving passage, and the lower part of the inspection ladder is connected to the stepladder so that the movement is prevented. When moving up and down, there is little risk of the inspection ladder swinging and the posture becoming unstable, and the inspection work can be performed well.

  The inspection ladder is formed in such a vertical length that a worker's movement space is formed on the lower side in a state of being suspended and supported by the moving rail. The length is shorter than the vertical dimension of the storage shelf by the dimension corresponding to the operator's movement space, and is more compact than the configuration with the same vertical length as the vertical dimension of the storage shelf. This makes it possible to reduce the weight. In addition, since the lower part of the inspection ladder is connected to a stepladder that is stably grounded, the lower part of the inspection ladder can be moved without providing a special device for preventing the lower part of the inspection ladder from moving. It becomes possible to prevent it, and the structure of the inspection ladder can be simplified.

  In addition, since a space for moving the operator is formed below the inspection ladder, the operator can carry out the inspection work for the inspection work regardless of the position of the inspection ladder in the longitudinal direction of the movement passage. The inspection ladder does not get in the way when entering / exiting the movement passage from or to the inside of the movement passage, and the inspection ladder can be light in weight as described above. Therefore, when moving the inspection ladder along the longitudinal direction of the moving passage while being suspended and supported by the moving rail, the moving operation can be easily performed with a small operation force. It can be easily performed.

  Therefore, the construction of the inspection ladder for performing the inspection work can be simplified, and an article storage device that can easily perform the inspection work can be provided.

  In addition to the first feature configuration, the second feature configuration of the present invention is an operation state in which the inspection ladder is prevented from moving with respect to the moving rail by contacting the moving rail, and the moving rail. There is an artificial operation type movement preventing means that can be switched to a non-actuated state that releases the contact action and allows the movement to be provided at the upper part of the inspection ladder.

  According to the second characteristic configuration, the movement-preventing means that is manually operated is provided on an upper portion of the inspection ladder, and the movement-preventing means is provided when the inspection ladder is moved along the longitudinal direction of the movement passage. When switching to the non-actuated state and stopping the movement along the longitudinal direction of the movement passage and maintaining the position, the movement blocking means is switched to the actuated state.

  In the case where the inspection ladder is moved from the standby movement position to the inspection work movement position, the inspection ladder can be moved by switching the movement blocking means to the non-operating state. In addition, when the operator moves the inspection ladder to the moving position for inspection work and the operator raises or lowers the inspection ladder, the movement prevention means is changed to the movement rail by switching the movement prevention means to the operating state. It is possible to prevent the upper part of the inspection ladder from moving due to contact action.

  Therefore, when performing the inspection work, the inspection ladder can be favorably moved along the longitudinal direction of the moving passage, and the inspection connected to the stepladder is in the moving position for the inspection work. By preventing the movement of the upper part of the inspection ladder as well as the lower part of the inspection ladder, the posture of the worker when raising and lowering the inspection ladder becomes more stable, so that the inspection work can be performed better. Is possible.

  According to a third characteristic configuration of the present invention, in addition to the second characteristic configuration, a manual operation unit for switching the movement blocking means between the operating state and the non-operating state is provided at a lower portion of the inspection ladder. In the point.

  According to the third characteristic configuration, the operator can switch the movement preventing means between the operating state and the non-operating state by operating a manual operation unit provided at a lower portion of the inspection ladder. . In other words, when performing the inspection work, the operator installs the stepladder at a position corresponding to the inspection ladder that has moved to the moving position for the inspection work, and puts the stepladder that is stably grounded and supported. The lower part of the inspection ladder and the stepladder are connected to rise, and at that time, the movement preventing means can be switched to the operating state by operating the manual operation unit. Not only the lower part but also the upper part of the inspection ladder can be prevented from moving.

  After the inspection work is completed, the operator gets off the inspection ladder and releases the connection between the stepladder and the inspection ladder. At that time, the operator is in the state of riding on the stepladder. The movement preventing means can be switched to the non-actuated state by operating and the inspection ladder can be moved along the longitudinal direction of the movement passage after getting off the stepladder.

  Therefore, since the manual operation part is provided at the lower part of the inspection ladder, the operator can get on the stepladder that is stably in contact with the floor without riding on the inspection ladder. In this state, the switching operation of the movement preventing means can be performed, and the switching operation can be easily performed.

  According to a fourth feature configuration of the present invention, in addition to any one of the first feature configuration to the third feature configuration, a pair of the inspection ladders are provided, and the pair of the pair of inspection ladders is provided at each of the longitudinal direction both ends thereof. There is a ladder fixing means for connecting the lower part of each of the inspection ladders to the fixing part to prevent the movement of the lower part of each inspection ladder.

  According to the fourth characteristic configuration, a pair of the inspection ladders are provided, and the lower portions of the pair of inspection ladders are fixed by ladder fixing means provided at each of both ends in the longitudinal direction of the moving passage. If it connects to, it will be in the state by which the movement of the lower part of each inspection ladder is blocked | prevented.

  In other words, when the inspection work is not performed, each of the pair of inspection ladders waits in a state in which the movement of the lower portion is prevented by the ladder fixing means provided at each of the both ends in the longitudinal direction of the moving passage. become. That is, one inspection ladder is positioned at one end in the longitudinal direction of the moving passage, and the other inspection ladder is positioned at the other end in the longitudinal direction of the moving passage. It waits with the lower part of each ladder connected to the fixed part.

  And when performing inspection work, the inspection ladder which can be moved to the moving position for inspection work without interfering with the stacker crane is selected from the pair of inspection ladders. By moving the ladder, the inspection ladder can be moved to the moving position for inspection work regardless of the position of the stacker crane.

  Therefore, by selecting and moving one of the pair of inspection ladders, it is possible to perform the inspection work by moving the inspection ladder without interfering with the stacker crane. .

Hereinafter, an embodiment of an article storage device according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the article storage device is installed in a clean room 1 that is cleaned with less dust. For example, an article such as a work-in-process product such as a semiconductor product or a liquid crystal display element is less dusty. It is configured to be stored in the environment.

  As shown in FIG. 2, the clean room 1 is configured as a downflow type in which purified purified air flows downward from the ceiling side to the floor side. That is, the floor portion of the clean room 1 is formed on the porous grating floor 2 having a large number of ventilation holes, the blowing portion 3 is formed on the ceiling of the clean room 1, and the sucked air sucked through the grating floor 2 is blown out. The purified air is circulated to the clean room 1 in a form that is blown out from the air.

  In other words, an intake chamber 4 is provided on the lower side of the grating floor 2, an air filter 5 made of a HEPA filter or the like is provided in parallel with the blowout portion 3, and an air chamber chamber 6 is provided above the blowout portion 3. The intake chamber 4 and the air chamber 6 are connected to each other through a connection channel 7, and a circulation fan 8 is provided in the connection channel 7.

  Then, due to the ventilation action of the circulation fan 8, the air in the clean room 1 is sucked into the intake chamber 4 through the grating floor 2, and the air sucked into the intake chamber 4 flows through the connection flow path 7 to pass through the prefilter 9. After passing through and being cleaned, the air flows into the air chamber chamber 6 and further passes through the air filter 5 to be cleaned and blown downward from the blowing unit 3 into the clean room 1. 1 is configured to be maintained in a state of high cleanliness.

  As shown in FIG. 1, the article storage device includes a plurality of articles that store articles in an installation space that is partitioned and formed in an outside air shielding state by a peripheral wall 10 that covers the outer periphery of the article storage device in a state of being parallel in the vertical and horizontal directions. A storage shelf 12 having a storage unit 11 and a stacker crane 14 for transporting articles that can travel along a movement passage 13 formed along the front surface of the storage shelf 12 are configured. A pair of storage shelves 12 are provided in a state of being positioned on both front and rear sides of the movement passage 13 of the stacker crane 14.

  As described above, the article storage device has a configuration in which the outer peripheral portion is surrounded by the peripheral wall 10, but an operator enters and exits at both ends in the longitudinal direction of the moving passage 13 in order to perform inspection work and the like. A doorway 15 is formed to close the doorway 15 with a door 16 that can be opened and closed.

A traveling rail 17 for traveling the stacker crane 14 is installed in the lower portion of the moving passage 13 along the longitudinal direction of the moving passage 13, and the stacker crane is disposed on the upper portion of the moving passage 13. A moving rail 18 that guides the upper portion of 14 is installed along the longitudinal direction of the moving passage 13. The stacker crane 14 includes an elevating mast 19 that extends in the up-down direction and is capable of traveling along the traveling rail 17. The elevating platform 21 is movable up and down with respect to the traveling cart 20. It is provided with an article transfer device 22 that is provided and can transfer articles. Then, as the traveling carriage 20 travels and the elevator 21 moves up and down, the elevator 21 stops at the target stop position for the article storage unit 11 to be transferred, and the article transfer device 22 can move the article. ing.
In addition, as shown in FIG. 1, a warehousing port 23 for carrying an article from the outside of the apparatus using one of the plurality of article storage units 11 is formed, and the other of the plurality of article storage units 11 is formed. A delivery port 24 for carrying out an article outside the apparatus using one of the above is formed.

  The article storage apparatus is supported by a moving rail 18 provided above the moving passage 13 so as to be movable along the longitudinal direction of the moving passage 13 and suspended by the moving rail 18. A state where the inspection ladder 25 is formed so as to form an operator's movement space R on the lower side in the state of being supported downward, and is in contact with the floor surface of the movement passage 13. A stepladder 26 that can be connected to the lower portion of the inspection ladder 25 is provided.

  A pair of the inspection ladders 25 are provided, and the pair of inspection ladders 25 are respectively provided at both ends in the longitudinal direction of the movement passage 13 in a normal operation state in which goods are stored and taken out. The stepladder 26 waits at an appropriate waiting place outside the apparatus. For example, when an inspection work by an operator is necessary, such as when an article conveyed by any of the article storage units 11 or the stacker crane 14 collapses, the inspection ladder 25 and the stepladder 26 are used. The operator will perform the inspection work.

Since the pair of inspection ladders 25 have the same configuration, the configuration will be described below as a representative of one of them.
The inspection ladder 25 is configured to be suspended and supported by the moving rail 18 by using the moving rail 18 for moving and guiding the upper side of the stacker crane 14. That is, as shown in FIG. 4, the inspection ladder 25 is composed of a plurality of footrest portions 28 that are erected at appropriate intervals in the vertical direction across the vertical rod members 27 on both the left and right sides and the vertical rod members 27 on the left and right sides. The upper rail of the upper connecting frame 29 that connects the vertical rod members 27 on both the left and right sides at the upper end is suspended and supported by the moving rail 18 so as to be movable. A movement guide unit 30 is provided.

  As shown in FIGS. 6, 7, 12, and 13, the movement guide portion 30 is rotatably supported by a bracket 31 fixed to the upper connection frame 29, and the cross-sectional shape is substantially the same. Connected to the bracket 31 and eight rolling wheel bodies 32 that are rotatable around a horizontal axis that rolls in a state of being sandwiched from both the upper and lower sides with respect to the horizontal guide portion 18 a of the moving rail 18 that is formed in a letter “D” shape. Four rolling ring bodies 34 that are rotatably supported by the support member 33 and that rotate about the vertical axis that rolls in a state of being sandwiched from both the left and right sides with respect to the vertical guide portion 18 b of the moving rail 18. And are configured to be suspended and supported by the moving rail 18 by the guiding action of the plurality of rolling wheel bodies 32 and 34.

  An action state in which the inspection ladder 25 is prevented from moving with respect to the movement rail 18 by making contact with the movement rail 18, and a non-action state in which the contact action with respect to the movement rail 18 is released to allow movement. A braking contact body 35 is provided on the upper portion of the inspection ladder 25 as an artificially operated movement blocking means that can be switched between. The braking contact body 35 is made of hard rubber having a braking function. Further, a manual operation unit 36 for switching the braking contact body 35 between an operating state and a non-operating state is provided below the inspection ladder 25.

  When a specific configuration is described, as shown in FIGS. 13, 14, and 15, it moves up and down between a state in which it contacts and releases a contact with the horizontal surface on the lower side of the moving rail 18. A free braking contact body 35 is provided in a state of being screwed and fixed to an upper portion of a slide rod 37 that penetrates the upper connecting frame 29 in the vertical direction. The slide rod 37 has a large-diameter portion 37a on the upper side thereof fitted and supported by a cylindrical portion 38 provided in a fixed state on the upper connection frame 29 so as to be movable in the vertical direction. A portion 37b is provided in a state of passing through the upper connecting frame 29 in the vertical direction, and a compression spring 39 that is received and supported by a nut is mounted on a portion protruding downward from the upper connecting frame 29. It is provided in a state where it is moved and urged to the side. When a biasing force is applied by the compression spring 39, the step portion between the small diameter portion 37b and the large diameter portion 37a is received and supported by the upper connection frame 29, and further downward movement is prevented. (See FIG. 16).

  The brake contact body 35 can be slid upwardly against the urging force of the compression spring 39 by manual operation. That is, as shown in FIGS. 13 and 16, the swing operation tool 40 formed in a substantially L shape in a side view is swung around the horizontal axis X <b> 1 by the support bracket 41 screwed and fixed to the upper connection frame 29. The swing operation tool 40 and the manual operation unit 36 provided at the lower part of the inspection ladder 25 are interlocked and linked by an operation wire 42, and are swung by the operation of the manual operation unit 36. By operating the moving operation tool 40 to swing, the braking contact body 35 is brought into contact with the moving rail 18 to prevent the inspection ladder 25 from moving relative to the moving rail 18, and the braking contact. The body 35 is configured to be able to switch to a non-operation state in which the contact action on the moving rail 18 is released and the movement is allowed.

  The swing operation tool 40 is positioned below the braking contact body 35 and is provided in a substantially horizontal posture, and is connected to the operation arm part 43 integrally. It comprises a connecting arm portion 44 formed in a substantially L shape so that the end side extends upward, and the operation arm portion 43 is substantially U-shaped in plan view so as to extend in a bifurcated manner on the left and right sides of the slide rod 37. As shown in FIG. 15, bearings 46 that are rotatable around the horizontal axis are respectively supported by a pair of swinging end portions of the operation arm portion 43 and supported by screws 45. When the operating tool 40 swings, the pair of left and right bearings 46 abut against the braking contact body 35 from below.

  The operation wire 42 is slidably inserted into the outer wire 42A, and both end portions in the longitudinal direction of the outer wire 42A are received and supported by wire receiving members 47 and 48, respectively, and the inner wire 42B is pulled. It is configured to pull. As shown in FIG. 16, one end portion of the inner wire 42 </ b> B is interlocked to the upper portion of the connecting arm portion 44, and the other end portion of the inner wire 42 </ b> B is connected to the manual operation portion 36 via the tension spring 49. It is linked and linked. The operation wire 42 is supported by a plurality of wire holders 50 provided at appropriate intervals so as to extend in the vertical direction through the lateral one side outside of the inspection ladder 25.

  The manual operation unit 36 is constituted by a clamp device of a well-structured dead point climbing type, and when the swing lever 36a is operated to the operating position (see FIG. 16), the inner wire 42B is pulled and the swing operation tool is operated. When the swinging operation is performed, the bearing 46 comes into contact with the lower side of the braking contact body 35 and the braking contact body 35 is pushed upward against the urging force of the compression spring 39, so that the braking contact body. 35 is configured to switch to an operation state in which the movement of the inspection ladder 25 with respect to the movement rail 18 is prevented by contacting with the movement rail 18. In this operation position, the manual operation unit 36 configured by the clamp device is in a state of overcoming the dead point, and the position is maintained even when the operator releases the hand from the swing rail 36a. When the swing lever 36a is operated to the non-operating position (see FIG. 17), the pulling operation of the inner wire 42B is released, and the braking contact body 35 is retracted downward by the urging force of the compression spring 39, and the moving rail 18 is configured to switch to a non-actuated state in which the contact action on 18 is released and movement is allowed.

  As described above, the pair of inspection ladders 25 are configured to stand by at both ends in the longitudinal direction of the movement passage 13 in a normal operation state. Ladder fixing means K for preventing the movement of the lower part of each inspection ladder 25 by connecting the lower part of each of the pair of inspection ladders 25 to a fixing part is provided at each of both ends.

  Specifically, as shown in FIGS. 4, 8, and 9, a connecting bracket 52 as a fixing portion is attached to the lateral frame 51 of the storage shelf 12 at each of both ends in the longitudinal direction of the moving passage 13. The insertion hole 55 formed in the connection bracket 52 is aligned with the insertion hole 54 formed in the connection tool 53 attached to the lower part of the vertical rod member 27 on both the left and right sides of the inspection ladder 25. By inserting the lock pin 56, the lower part of the inspection ladder 25 is connected and fixed to the connection bracket 52. That is, the connecting bracket 52 and the lock pin 56 constitute the ladder fixing means K.

  The lock pin 56 is constituted by a headed pin bent and formed in a substantially L shape so that it cannot be easily detached due to vibration or the like. In addition, when removing by hand, it can be easily removed by removing the lock pin 56 while changing the direction corresponding to the bent state.

  As described above, the entrance / exit 15 for the operator to enter / exit the movement passage 13 is formed at each of the both ends of the movement passage 13 in the longitudinal direction, but the inspection ladder 25 includes the movement rail 18. Is formed in such a vertical length that a worker's movement space R is formed on the lower side in a state where it is suspended and supported by the operator, so that the operator opens the door 16 and moves through the doorway 15. Even when entering and leaving the passage 13, the inspection ladder 25 does not interfere with the movement of the operator.

  For example, when an article is collapsed and inspection work by an operator becomes necessary, first, of the pair of inspection ladders 25, movement for inspection work without interfering with the stacker crane 14 is performed. The inspection ladder 25 that can be moved to the position is selected, and the lock pin 56 is removed from the selected inspection ladder 25 using, for example, the stepladder 26, and the connection and fixation with the connection bracket 52 is released. Then, the inspection ladder 25 is moved to a moving position for inspection work. At that time, since the operator moves on the floor surface, the inspection ladder 25 is moved using a long rod (not shown) having a hook portion formed at the tip.

  After moving the inspection ladder 25 suspended and supported by the moving rail 18 to the moving position for inspection work along the longitudinal direction of the moving passage 13, the stepladder 26 is moved below the inspection ladder 25. The stepladder 26 and the lower part of the inspection ladder 25 are connected to each other by using the lock pin 56 while being grounded to the floor surface of the moving passage 13 while being positioned on the side.

  That is, as shown in FIGS. 10 and 11, a connecting tool 58 in which an insertion hole 57 through which the lock pin 56 is inserted is formed at the upper end portion of the stepladder 26, and the vertical rod members 27 on both the left and right sides of the inspection ladder 25. Each of the insertion holes 57 formed in the connection tools 58 on the left and right sides, and the insertion holes 54 formed in the connection tools 53 attached to the lower portions of the vertical rod members 27 on the left and right sides. After aligning each, the lock pin 56 is inserted, and the stepladder 26 and the lower part of the inspection ladder 25 are connected. The insertion hole 57 formed in the connector 58 provided in the stepladder 26 is a long hole extending in the vertical direction, and the lock can be locked even if the relative position of the stepladder 26 and the inspection ladder 25 is slightly shifted in the vertical direction. The connection by the pin 56 can be performed satisfactorily.

  Next, the operator ascends to the stepladder 26 and operates the swing lever 36a to the operating position, so that the braking contact body 35 is brought into contact with the moving rail 18 and the inspection ladder 25 is moved to the moving rail 18. Switch to a working state that prevents movement. This prevents the upper portion of the inspection ladder 25 from moving relative to the moving rail 18. On the other hand, since the lower part of the inspection ladder 25 is connected to the stepladder 26, the movement is prevented, so that when the operator raises or lowers the inspection ladder 25, the inspection ladder 25 swings unstablely. Therefore, the operator is less likely to become unstable and can perform the inspection work well (see FIGS. 2 and 5).

  After the inspection work is finished, the swing lever 36a is operated to the non-operating position so that the braking contact body 35 is retracted downward to release the contact action on the moving rail 18 and allow the movement. Switch to. Thereafter, the inspection ladder 25 is moved to one end in the longitudinal direction of the moving passage 13, and the inspection ladder 25 and the connection bracket 52 are connected using the lock pin 56 to fix the lower portion of the inspection ladder 25. However, the stepladder 26 is returned to a predetermined standby position outside the apparatus (see FIG. 4).

[Another embodiment]
Hereinafter, other embodiments are listed.

(1) In the above-described embodiment, the manually-operated movement blocking means that can be switched between an operation state for blocking the movement of the inspection ladder with respect to the moving rail and a non-operation state for allowing movement is provided on the inspection ladder. The manual operation unit provided at the upper part and for switching the movement preventing means between the operating state and the non-operating state is provided at the lower part of the inspection ladder, but instead of such a configuration, for example, The manual operation unit may be provided on the upper part of the inspection ladder, and the inspection ladder may be prevented from moving by being connected to a stepladder, so that the movement blocking means may not be provided.

(2) In the above embodiment, ladder fixing means for preventing movement of the lower part of the inspection ladder is provided at both ends in the longitudinal direction of the moving passage, and the connecting bracket as a fixing portion is provided as the ladder fixing means. The lower part of the inspection ladder is fixed by a detachable lock pin. However, as the ladder fixing means, for example, the lower part of the inspection ladder and a connecting bracket as a fixing part are fixed by fastening with a belt. Various fixing means can be used such as a structure that is fixed using a magnet or the like. Moreover, it is good also as a structure which is not provided with such a ladder fixing means. Moreover, in the said embodiment, although the said lock pin was removed, it replaced with such a structure, for example, you may make it link a lock pin with an inspection ladder or a connection bracket.

(3) In the above embodiment, the moving rail for moving and guiding the upper part of the stacker crane is used as the moving rail for moving and guiding the inspection ladder. However, the present invention is not limited to this configuration. In addition to the moving rail for moving and guiding the upper part of the stacker crane, a dedicated moving rail for moving and guiding the inspection ladder may be provided.

(4) In the above-described embodiment, the pair of storage shelves are arranged in a state where they are arranged in the front-rear direction with the movement passage interposed therebetween. It is good.

(5) In the above embodiment, the configuration in which the article storage device is provided in the clean room is illustrated, but the configuration may be provided in a general indoor environment installation space instead of the clean room.

Top view of the article storage device Side view of the article storage device Side view of stacker crane Front view of inspection ladder in standby state Front view of the inspection ladder when connected to the stepladder Front view of a partially cutout ladder for inspection Partially cutaway side view of inspection ladder Front view showing the configuration of the ladder fixing means Side view showing the configuration of the ladder fixing means Front view showing the connection between the inspection ladder and the stepladder Side view showing connection between inspection ladder and stepladder Notched front view showing the structure of the movement guide Notched front view showing the support structure for the movement prevention means Notched side view showing support structure for movement blocking means Notched plan view showing support structure of movement preventing means Action explanatory diagram of the state where the movement blocking means is switched to the operating state Action explanatory diagram of the state where the movement blocking means is switched to the non-operating state

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Article storage part 12 Storage shelf 13 Movement path 14 Stacker crane 18 Movement rail 25 Inspection ladder 26 Stepladder 35 Movement prevention means 36 Manual operation part K Ladder fixing means R Space for movement

Claims (4)

A storage shelf provided with a plurality of article storage units for storing articles in a state of being parallel in the vertical direction and the horizontal direction, and a stacker crane for transporting articles that can travel along a movement passage formed along the front surface of the storage shelf An article storage device equipped with
In a state of being suspended and supported so as to be movable along the longitudinal direction of the moving passage by a moving rail provided in the upper portion of the moving passage and suspended by the moving rail, An inspection ladder formed in an up and down length so as to form an operator's movement space, and a stepladder that is connectable to the lower part of the inspection ladder while being in contact with the floor of the movement passage. An article storage device configured to include:   Switching between an operating state in which the inspection ladder is prevented from moving with respect to the moving rail by contact with the moving rail and a non-operating state in which the contact action with respect to the moving rail is released to allow movement. 2. The article storage device according to claim 1, wherein a freely manipulative movement preventing means is provided on an upper portion of the inspection ladder.   The article storage device according to claim 2, wherein a manual operation unit for switching the movement blocking means between the operating state and the non-operating state is provided at a lower portion of the inspection ladder. A pair of inspection ladders are provided,
Ladder fixing means is provided at each of both ends in the longitudinal direction of the moving passage to connect the lower portions of the pair of inspection ladders to fixing portions and prevent the lower portions of the inspection ladders from moving. Item storage device of any one of claim | item 1-3.

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