JPH0524046B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a movable shelf device that can efficiently utilize floor space in a building in which a plurality of columns are installed.

[Prior art] A movable shelf with a large number of storage shelves is stacked on top of each other with the storage surfaces facing each other when storing items, and the movable shelves are moved only when taking out and taking out items to form a work path. Therefore, movable shelving devices are often used to increase the efficiency of storing items inside buildings.

However, when pillars that interfere with the movable shelves are arranged side by side in the moving direction on the floor of a building in which such a movable shelf device is installed, the movable shelves are arranged using only the floor surface between the columns. was.

[Problem that the invention seeks to solve]

As a result, in addition to not being able to use the floor surface of the total length of the width of the columns, it is necessary to form a working passage between each column, which results in poor floor utilization efficiency. On a floor surface with such pillars, the utilization efficiency is about 50%.
The value was relatively low.

The present invention eliminates the dead space conventionally caused by columns by including a plurality of first movable shelves disposed between columns and a second movable shelf of a small length provided near the columns as movable shelves. The object of the present invention is to provide a movable shelf device that can be used to attach a movable shelf, improve floor utilization efficiency, and solve the above-mentioned problems.

[Means for solving problems]

The present invention provides a movable shelf device that includes a storage surface provided with a plurality of storage shelves, and in which a plurality of movable shelves that can be moved in a lateral direction orthogonal to the storage surface are provided in a building in which pillars are arranged side by side in the lateral direction. The movable shelf has a vertical length such that an end protrudes between the horizontal surfaces of the pillars, and is juxtaposed in the horizontal direction between the pillars, and the width of the working path is longer than the length L1 between the horizontal surfaces of the pillars. A plurality of first movable shelves whose total width is a length L1-L2 obtained by subtracting the width L2, and a plurality of first movable shelves having a vertical length smaller than the first movable shelves and arranged near the pillar. a second movable shelf whose end portion moves along the vertical surface of the column and has a width of a total length L2+L3 of the width L3 of the column in the lateral direction and the width L2 of the working passage; and the plurality of first movable shelves are arranged on both sides of at least one second movable shelf in the lateral direction, wherein the movable shelves include first and second movable shelves.
By including movable shelves, even when pillars are arranged horizontally on the floor, the movable shelves can be accommodated by utilizing other floor surfaces while forming one working passage, increasing floor space utilization efficiency. , can be increased by over 70%.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

The movable shelf device A is provided with a plurality of movable shelves 1 that can be moved in a lateral direction orthogonal to the storage surfaces a and b on a floor surface F in a building where columns C are arranged side by side in the lateral direction,
Further, in this example, the floor surface F forms a horizontally long rectangle. In addition, the pillar C has a pair of pillars C1, C facing each other and lining up in the horizontal direction with the inner vertical surfaces CB and CB being the same distance W1.
1. Column C2, C2, Column C3, C3, Column C4, C4
, and the distance between the horizontal planes CA on which the pillars C are arranged side by side is set to the same length L1.

Furthermore, the movable shelf 1 has a first
This includes a movable shelf 11 and a second movable shelf 12 provided near the pillar C.

In addition, the first movable shelves 11 are two first movable shelves 11 disposed on the left side of the column C1 in FIG. 1A.
Three first movable shelves 11 between columns C1 and C2..., three second movable shelves 11A and 11 between columns C2 and C3
B, 11C, three movable shelves 11 between pillars C3 and C4
..., one first movable shelf 11 on the right side of column C4. Further, the second movable shelf 12 includes second movable shelves 12A, 12B, 12C, and
12D, while FIG. 1A and FIG.
Only B and 12C are shown.

In addition, in the device A of this example, one width dimension L2 that opens the accommodation surfaces a and b by moving the movable shelf 1 apart.
A working passage 10 is formed.

Furthermore, the movable shelf 1 has a shelf frame 22 on a movable cart 21.
In this example, the storage surfaces a and b are formed on both sides of the shelf frame 22. Also, mobile trolley 21
The three rails 23 extending laterally can be run individually using an appropriate motor, and the shelf frame 22 is provided with partition plates vertically arranged horizontally.
Storage shelves 25 are formed in multiple rows and stages.

Further, in this example, the first movable shelf 11 has a vertical length that is almost the same as the distance W2 between the vertical surfaces CC and CC outside the pillars C, so that the end thereof is located between the horizontal surfaces CA. The ends protrude into the space, and in this example, the width dimension L11 of all the first movable shelves 11 is set to be the same. In addition, the width L11 is the total width of the first movable shelf 11 included between each column C.
The length L1-L2 is obtained by subtracting the width L2 of the working passage 10 from the length L1 between the lateral surfaces CA. As a result, each storage surface a, b of the first movable shelf 11
can be opened by moving the first movable shelf 11 to form a working passage 10, respectively.

Further, the second movable shelf 12 has a vertical dimension slightly smaller than the distance W1 between the vertical surfaces CA of the columns C facing each other, so that the end portion can move along the vertical surface CA, and Lateral width dimension L3 of C
and the width dimension L2 of the working passage 10, the total length L2
It has a width dimension L4 of +L3.

As a result, as shown in FIG.
A second movable shelf 12 is arranged in the working passage 10 to be formed between the columns C and the gap between the vertical surfaces CB facing each other, so that the floor surface F can be used effectively and space utilization efficiency is increased. . In this way, by arranging the plurality of first movable shelves 11 of each of the above configurations on both sides in the lateral direction of the second movable shelf 12 of the above configuration,
In the movable shelf device A, one working path 10 is left and the other floor surface can be utilized for storing articles.

Furthermore, in the movable shelf apparatus A of this example, each work passage 10 formed by moving the movable shelf 1 apart...
A rail 101 for vertical movement is provided, and a rail 103 for lateral movement perpendicular to the rail 101 is provided at an extension thereof, and articles are stored and stored between the rails 101 and 103 and the storage shelf 25. In addition, a loading/unloading cart 2 capable of loading and unloading articles is run between the loading/unloading platform 15 provided along the rail 103, and each movable shelf 1 has a storage surface a between the movable shelves 1, 1. , b, and which can be connected and remotely released.

Further, the number of storage shelves 25 can be freely set, and the movable shelves 11 have a width dimension L1 in the horizontal direction.
1 and the height H from the upper surface of the rail to the upper end, H/L11, is set to about 6. Also, connection device 1
3 are attached to a plurality of positions at different heights, such as the top surface of the movable cart 21 and shelf frame 22 of the movable shelf 1.

As schematically shown in FIG. 3, the connecting device 13 consists of a locking fitting 35 and a receiving fitting 36 that engage with each other, and the receiving fitting 36 is connected to an L-shaped plate 39 for mounting.
A receiver tube 4 is attached to the front surface of the receiver via an elastic material 40 such as rubber.
1 is firmly attached. The receiving tube 41 has a large diameter receiving hole 45 formed concentrically with a small diameter insertion hole 43 on the front surface, with a stepped locking part 44 in between. The latch 35 also has a pair of claw pieces 47 on the base box 46.
and a linear motion machine 49 such as a cylinder or solenoid.
and a driven portion 52 on the other side. Note that the claw portion 50
protrudes from a hole provided in the base box 46, and the protruding portion is provided with a triangular guide portion that tilts toward the center via a stepped engagement portion 54 that projects outward. . Further, the driven portion 52 has a substantially U-shape, and has a driven surface 5 having an inclined surface at the rear end.
There are 6. The driven surface 56 is a cam 57 such as a roller provided at the rod end of the linear motion machine 49.
However, as the claws 50, 50 are compressed and pressed, the claws 50, 50 are inclined in the closing direction. Also claw piece 47
is biased by the spring 51 in the direction in which the claw portion 50 is opened.

By attaching such latching fittings 35 and receiving fittings 36 to the movable shelf 1 so as to face each other, the claw portion 50 is inserted into the insertion hole 43 by the guide portion as the storage surfaces a and b move toward each other. At the same time, the engaging portion 54 engages with the locking portion 44 of the receiving metal fitting 36, thereby connecting the two. Further, the connection can be released by the operation of the linear motion machine 49, and the elastic material 40 of the receiving metal fitting 36, together with the elastic material 59 on the front surface of the base box 46, can alleviate the impact that occurs when the connection is made.

As shown in FIG. 4, the connecting device 13 has a latch 35 formed using a claw piece 47 that is attached to a support shaft 62 that pivots vertically on the movable shelf 1 using bearings 61. , and the support shaft 62 is connected to a reduction motor 65 via a one-way dog clutch 64.
One end of it is attached to. Note that the clutch 6
4 is a locking portion 5 consisting of a claw portion 50 at the tip of a claw piece 47;
4 can be freely rotated in a downward direction, and therefore, the claw piece 47 can freely rotate its claw-shaped engaging portion 54 downward by the torsion spring 66 provided at the other end of the support shaft 62. energized. Also, due to this bias, the engaging portion 54 is locked to the locking portion 44 at the front edge of the U-shaped frame 67 of the receiving metal fitting 36. In addition, the reduction motor 65
Due to the rotation of , the claw pieces 47 are flipped up all at once by the support shaft 62 and can be released remotely, and the spring 69 provided at the root of the U-shaped frame 67 acts on the coupling device 13 together with the torsion spring 66. It can reduce the impact.

Note that each claw piece 47 may be connected to the support shaft 62 via a one-way meshing clutch, and each claw piece 47 may be formed so as to be biased downward by a torsion spring 66. A reduction motor 65 can also be provided.

The connecting device 13 also includes a latch fitting 3 shown in FIG.
5 and the receiving metal fitting 36. The latch fitting 35 includes an actuation plate 70 that can be reciprocated using a cylinder (not shown) or the like, and a slide piece 72 that engages with a cam hole 71 provided in the actuation plate 70. An engaging portion 54 consisting of a claw piece 47 biased downward by a lever 51 is held so as to be able to be pulled up. Further, the receiving fitting 36 has the claw piece 4 attached to a plate-shaped base plate 74 having an arc-shaped guide portion at the tip.
7 is provided with a locking portion 44 consisting of a hole that can be engaged with. Therefore, when the receiving surfaces a, b, etc. are close together and the slide piece 72 is positioned above the locking portion 44, the locking portion 44 can be engaged. The stop portion 44 and the engaging portion 54 fit together. Further, the engagement can be released by remotely operating the actuating plate 70 and pulling up the slide piece 72.

In this way, the coupling device 13 can connect the movable shelves 1 and 1, and by remotely releasing the connection,
When moving the movable shelf 1 away to form the working passage 10, the coupling device 13 can be released. In addition, when moving apart, a plurality of movable shelves 1 on the side to be left still and movable shelves 1 on the side to be moved can be connected.

In addition, a pair of rails 101, 101 for vertical movement are provided at positions forming the working path 10, which are perpendicular to the rails 23 and are used for the vertical movement of the cargo handling cart 2 for loading and unloading articles between the rails 23 and the storage shelves 25. . Note that in FIG. 1, only one pair of rails 101 is shown for the sake of simplicity.

Furthermore, the rails 103, 103 for lateral movement are provided on the extension of the rail 101 along the edge of the movable shelf 1 as described above.

The cargo handling cart 2 is shown in FIGS. 2, 6, 8 and 9.
As shown in the figure, the upper part of the vehicle body 3 is provided with a transfer device 4 for delivery and delivery, and a cargo handling shelf 5 that can store goods, and the lower part thereof is provided with the rail 101 for vertical movement, which can be raised and lowered. Four first wheels 8 running on the rails 103 and four second wheels 9 running on the lateral movement rails 103 are provided.

In this example, the cargo handling shelf 5 is a shelf body in which a shelf board and a top board are provided on pillars set up at four corners of a bottom plate, and each shelf part has the same shape as the opening 26 of the storage shelf 25. It is provided with openings 106, 106 on the front and back sides, and is placed on the vehicle body 3 with the opening 106 aligned with the longitudinal direction of the vehicle body 3. Also, in car body 3,
A transfer means 107 (shown in FIGS. 6 and 9) such as a roller conveyor that can move the cargo handling shelf 5 in the longitudinal direction of the vehicle body 3, that is, in the longitudinal direction, is provided on the upper surface of the portion that receives the cargo handling shelf 5. .

The transfer tool 4 includes a mast 11 erected on the vehicle body 3.
0, and a lifting frame 1 that moves up and down by the mast 110.
11, a guide plate 112 provided on the elevating frame 111 in a direction across the vehicle body 3, a transverse frame 113 supported by the guide plate 112, and a rear frame 113 supported rotatably in a horizontal plane by the transverse frame 113. frame 114
And, the pant reach mechanism 1 is attached to the rear frame 114.
Front frame 11 attached via 15
6, and a pair of forks 119 attached to the front surface of the front frame 116.

The mast 110 has a well-known structure in which an intermediate frame is disposed between the mast 110 and the elevating frame 111, and the elevating frame 111 is raised and lowered in two stages. Also, in the lifting frame 111,
As described above, the horizontal guide plates 112 are attached above and below the horizontal guide plates 112, and the transverse frame 113 is held by the guide plates 112, and the transverse frame 113 is caused to traverse by a cylinder or the like (not shown). Also horizontal frame 11
3 is provided with overhangs 131 and 132 that protrude forward on the upper and lower sides of a vertically long base 130, and the rear frame 11 is
4 is pivoted up and down. Moreover, the upper overhang part 131
A rotation driver 133 such as a hydraulic motor or an electric motor for rotating the support shaft of the rear frame 114 is housed in the rear frame 114 .
can be rotated horizontally within a range of 180 degrees perpendicular to both sides of the vehicle body.

Further, the rear frames 114, 114 are constructed by connecting the upper and lower parts of vertical frames having grooves on opposing sides by connecting plates, and the front frame 116 also has a similar structure. Furthermore, the pantaleach mechanism 115
is equipped with a pair of arms 135, 136 on both sides, whose central part is pivotally supported using a pin 134, and the lower end of each arm 135, 136 is connected to the rear frame 11.
4. It is rotatably supported on the front frame 116, and each other end is loosely engaged with the groove of the vertical frame via a guide roller. Furthermore, by moving the pin 134 using a cylinder 137, the fork 119 can be moved through the front frame 116.
can be reciprocated over a distance approximately equal to the depth of the storage shelf 5 from a position where it can be inserted into the storage shelf 5 to a position where it can be taken out.

Therefore, the transfer tool 4 can move the fork 119 back and forth and laterally, position it at right angles to the vehicle body 3, and as the mast 110 extends, it moves the fork 119 to the position of the uppermost storage shelf 25 of the movable shelf 1. Can be raised and lowered.

In addition to reciprocating the fork 119 using the pant reach mechanism, it can also be reciprocated using a so-called mast reach method in which the fork including the mast moves back and forth.

As described above, the vehicle body 3 is provided with first wheels 8 for longitudinal travel and second wheels 9 for transverse travel in the vicinity of the four corners of the vehicle body 3.

As shown in FIG. 10, the wheels 8 and 9 have flanges 1 on both sides by recessing a circumferential groove 139.
40,140. Also, the rail 10
No. 1,103 is provided with wing portions 142, 142 on both sides of a raised portion 141 that loosely fits into the circumferential groove 139, and the flange 140 rolls on the wing portions 142. Further, a joint plate 143 shown in FIG. 11 is provided at the intersection of the rails 101 and 103. Joint plate 14
3 has a protrusion 145 having a square plane and two orthogonal cross sections having the same shape as the protrusion 141, and a groove 146 through which the flange 140 passes, separating each protrusion 1.
41 is provided on the rectangular lower plate 147, and by making the lower plate 147 and the wing portions 142 the same height, the flanges 140 of the wheels 8, 9
can pass through the intersection smoothly.

As shown in FIG. 12, it is also possible to use a connecting plate 143 provided at the intersection with a raised part 146 that rotates when the wheels 8 and 9 approach and connects between the raised parts 141 through which the wheels 8 and 9 pass. . Furthermore, rail 23
The intersection between the rail 101 and the rail 101 is similarly configured.

The first and second wheels 8..., 9... are attached to the vehicle body 3 via lifting means 18, 19. As illustrated in FIG. 9, the elevating means 18 includes a wheel unit 153 having a rectangular guide shaft 152 at the upper end of a U-shaped frame 151 that pivotally supports the first wheel 8, and It consists of a cam shaft 157 that passes through a drilled cam hole 155 and can be reciprocated by a cylinder 156 or the like. The guide shaft 152 is supported by a boss 159 protruding from the middle frame 158 of the vehicle body 3 in accordance with the position of the wheel 8 so as to be slidable up and down. Further, the cam shaft 157 has cam portions 162, 162 formed at both ends of the base portion 161. Cam part 162
A cam surface 163 for lifting located on one end side of the camshaft 157, and a cam surface 165 for pushing down formed on the cam surface 163 via a slope 164 that slopes downward toward the other end. have The cam shaft 157 is attached by inserting the cam portion 162 into the cam hole 155 and a guide hole 167 formed in the boss 159 facing each other on the rails 101, 101. Further, the wheel unit 153 has a boss 1
By being biased toward the pulling side using the spring 169 on the upper surface of 59, the pulling cam surface 163
By engaging with the lower surface of the cam hole 155, the wheel 8 can be pulled up, and by moving the cam shaft 157, the push-down cam surface 165 is aligned with the cam hole 155, so that the wheel 8 can be pushed down and pulled up from the rail. 1
01.

Note that a similar lifting means 18 is provided on the opposite side in order to lift and lower the other first wheels 8, 8. Furthermore, the elevating means 19 for elevating the second wheels 9...
It has the same configuration as the elevating means 18, and the cam shaft 157
The second wheel 9 can be raised and lowered by the reciprocating motion of the second wheel 9. Further, a motor 170 is attached to the driving wheels 8 and 9.

In addition, when raising and lowering the wheels 8, 9, the lifting means 18, 19 first ground all the wheels 8..., 9... on the running surface, which is the rail 101, 103, and then lift the first wheel 8 or the first wheel to be lifted. The second wheel 9 is pulled up, thereby preventing the vehicle body 3 from tilting when the wheels 8 and 9 are moved up and down.

Note that various types of elevating means 18 and 19 can be used, such as a jack-like type using a screw shaft, or a type that is directly raised and lowered using a hydraulic cylinder or the like.

Further, the movable shelf device A is provided with an loading/unloading platform 15 along the rails 103 for loading and unloading articles to and from the cargo handling cart 2, and each movable shelf 1 and the floor F are provided with an earthquake detection platform. Earthquake detector 1
6 is provided.

As shown in FIGS. 1 and 2, the loading/unloading table 15 includes a loading/unloading section 15A for taking out articles from each of the three shelves of the cargo handling cart 2, a loading section 15B for sending articles to the shelves, and a loading/unloading section 15B for loading articles to the shelves. It has a loading and unloading section 15C for loading and unloading shelves 5 all at once, a loading and unloading section 15A, a loading section 1
Each shelf board of 5B is provided with an automatic transfer device 171 including a reciprocating fork, etc.
A transfer device 17 such as a roller conveyor is placed on the top surface of C.
2 is provided. Therefore, the cargo shelf 5 of the cargo handling cart 2
It is also possible to store and unload articles on each shelf board, and the storage shelf 5 as a whole can be loaded and unloaded into and out of the cargo handling cart 2 using the loading and unloading section 15C.

[Effect]

The movable shelf 11 illustrated in FIGS. 1A, B and 2
In the case where the work passage 10 is formed by providing a gap between the storage surfaces a and b of B and 11C, the cargo handling cart 2 moves the transverse frame 113 of the transfer tool 4 opposite to the storage shelf 25 to be loaded and unloaded. After moving the fork 119 to the side on the guide plate 112, the fork 119 is moved to the storage shelf 25 via the rear frame 114 by the rotary drive machine 131.
Rotate it to the position where it faces. Also, after adjusting the height to the predetermined storage shelf 25 by extending the mast 110,
The pantry reach mechanism 115 can be operated to deposit and store articles. Further, the fork 119 can be positioned toward the storage shelf by a reverse operation, and the pant reach mechanism 115 can be used to retrieve the cargo from the shelf. After the predetermined work, the cargo handling cart 2 moves vertically on the rail 101, straddles the rails 103, 103, and carries a second
The wheel 9 stops at the alignment position. In such a state, operating the lifting means 19,
The second wheel 19 is grounded on the rail 103. Thereafter, the first wheel 8 is lifted up using the lifting means 18 as described above. Therefore, the cargo handling cart 2 can traverse on the rail 103 to the next rail 101 position or to the loading/unloading platform 15. Articles can be taken in and out of the warehouse 15 as described above.

Next, when forming the working passage 10A between the pillar C2 and the movable shelf 11A, the connecting device 1 therebetween is formed.
3 as described above. Furthermore, the two movable shelves 11A and 11B connected by the connecting device 13 are moved as one unit. Therefore, the width can be increased by the connection, and the height relative to the width can be relatively reduced. The elastic material 4
This is prevented in conjunction with the buffering effect of 0. Furthermore, when the movable shelves 1 that move as one unit pass through the work passage 10 and face the accommodation surface a of the movable shelf 11C, the coupling device 13 is automatically coupled.

Furthermore, when forming the working passage 10B between the second and third movable shelves 11A and 11B, the movable shelf 11
A and 11B are moved as one unit, connected to moving shelf 11C, and then moved backwards as one unit, and then moved to moving shelf 1.
Reactivate only 1B and 11C.

Further, by integrally moving the first movable shelves 11A, 11B and the second movable shelf 12B, a working passage 10C can be formed on the left side of the column C2.

FIG. 7 shows another example of the cargo handling trolley 2, in which the vehicle body 3
Pilot seats 3A and 3B are provided on both sides of the vehicle, and solid tires are used for the first and second wheels 8 and 9. Such a cargo handling cart 2 has a mobile shelf 1
It can be suitably used when the upper surface of the traveling rail 23 is buried flush with the floor surface F.

Further, when the earthquake detector 16 detects an earthquake, it stops the movement of the movable shelf 1 and the fence truck 6 in advance, and when it detects an earthquake while it is moving, it stops it in a relatively short time without producing an impact.

〔Effect of the invention〕

In this way, the movable shelf device of the present invention includes the first movable shelf disposed between the columns and the second movable shelf disposed near the columns, so that the movable shelf device of the present invention can be mounted on a floor surface where the columns are arranged in parallel. In addition, it is also possible to leave one work passage and use the other floor surface for storage, and it is possible to arrange movable shelves while reducing the amount of work, improving the efficiency of floor use and increasing the storage volume.

In addition, in the apparatus of the present invention, when the pillars C are arranged in parallel at the center of the floor surface F, the second movable shelf 12
are placed on both sides of the column.

[Brief explanation of the drawing]

Fig. 1A is a plan view showing an embodiment of the present invention, Fig. 1B is a plan view showing the operation, Fig. 2 is a perspective view showing the main parts thereof, and Figs. 3 to 5 illustrate the coupling device. A perspective view, FIGS. 6 and 7 are front views illustrating the cargo handling cart,
FIG. 8 is a plan view showing an enlarged front part of the transfer tool;
FIG. 9 is a perspective view illustrating the vehicle body together with a means for lifting and lowering the wheels; FIG. 10 is a sectional view illustrating the wheels;
1 and 12 are plan views illustrating the intersection of rails. 1...Moving shelf, 2...Cargo handling cart, 3...Car body,
4... Transfer tool, 5... Loading shelf, 8... First wheel, 9... Second wheel, 10, 10A, 10B,
10C...Working passage, 11, 11A, 11B, 1
1C...first movable shelf, 12, 12A, 12B,
12C, 12D... Second movable shelf, 16... Earthquake detector, 18, 19... Lifting means, 25... Accommodating shelf, a, b... Accommodating surface, C1, C2, C3, C4
...column, CA...horizontal surface of the column, CB...vertical surface of the column.

Claims (1)

[Scope of Claims] 1. A movement in which a plurality of movable shelves are provided in a building in which pillars are arranged side by side in the horizontal direction, and a plurality of movable shelves are provided with a storage surface provided with a plurality of storage shelves and can be moved in a lateral direction orthogonal to the storage surface. The movable shelf is a shelving device, wherein the movable shelf has a vertical length such that an end protrudes between the horizontal surfaces of the pillars, and is juxtaposed in the horizontal direction between the pillars, and is longer than a length L1 between the horizontal surfaces of the pillars. A plurality of first tubes whose total width is the length L1-L2 obtained by subtracting the width L2 of the working passage.
a movable shelf having a vertical length smaller than that of the first movable shelf and disposed near the pillar, so that an end portion thereof moves along the vertical surface of the pillar, and a horizontal part of the pillar a second movable shelf having a width dimension of a total length L2+L3 of the width dimension L3 in the direction and the width dimension L2 of the working passage, and the plurality of movable shelves on both sides in the lateral direction of at least one second movable shelf. A mobile shelf device in which one mobile shelf is arranged.