Lifting device

Abstract

To provide a lifting device including a first cable connected to a first lifting body and a first protective member for storing the first cable, and capable of suppressing the possibility that the first protective member interferes with a second lifting body below the first lifting body.SOLUTION: The first elevation locus T1, which is the elevation locus of the first elevator 2, and the second elevation locus T2, which is the elevation locus of the second elevator, overlap each other when viewed in the vertical direction. The first protection member 5 is arranged such that the first moving-side hanging part 53 hanging from the first moving end 51 and the first fixed-side hanging part 54 hanging from the first fixed end 52 are aligned in the Y direction. The bending direction of the first connecting portion 55, which is bent so as to protrude downward and connects the lower ends of the first moving-side hanging portion 53 and the first fixed-side hanging portion 54, is limited to a direction along the Y direction when viewed in the vertical direction, and the first moving-side hanging portion 53 and the first fixed-side hanging portion 54 are arranged on the first side T1 in the X direction with respect to the first elevation trajectory T2 and the second elevation trajectory X1.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a lifting device including a support column arranged along the vertical direction, a first lifting body that moves up and down along the support column, and a second lifting body that moves up and down along the support column below the first lifting body.

Background Art

[0002] An example of such a lifting device is disclosed in Patent Document 1 below (see FIG. 2 of Patent Document 1).

[0003] Further, Patent Document 2 below discloses a lifting device including a support column (7) arranged along the vertical direction, a lifting body (10) that moves up and down along the support column, a cable (13) connected to the lifting body, and a protection member (17) that houses the cable. The reference numerals shown in parentheses are those of Patent Document 2.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, it is conceivable to apply the configuration of Patent Document 2 to the lifting device of Patent Document 1 and provide a first cable connected to the first lifting body and a first protection member that houses the first cable. However, in such a configuration, when the first protection member swings toward the lifting trajectory of the second lifting body due to the lifting or the like of the first lifting body, the first protection member may interfere with the second lifting body.

[0006] Therefore, in a configuration comprising a first cable connected to a first lifting body and a first protective member housing the first cable, it is desirable to realize a lifting device that can minimize the possibility of the first protective member interfering with a second lifting body located below the first lifting body. [Means for solving the problem]

[0007] In light of the above, the characteristic configuration of the lifting device is: Support columns arranged along the vertical direction, A first lifting body that moves up and down along the aforementioned support column, A second lifting body that moves up and down along the support column below the first lifting body, The first cable connected to the first lifting body, A lifting device comprising a first protective member for housing the first cable, The first protective member comprises a first movable end connected to the first lifting body, a first fixed end connected to the support column or a first fixed member whose position relative to the support column is fixed, a first movable side hanging portion hanging downward from the first movable end, a first fixed side hanging portion hanging downward from the first fixed end, and a first connecting portion that is bent to protrude downward and connects the lower ends of the first movable side hanging portion and the first fixed side hanging portion. The first lifting trajectory, which is the lifting trajectory of the first lifting body, and the second lifting trajectory, which is the lifting trajectory of the second lifting body, overlap in a vertical view along the vertical direction. Let the specific direction along the horizontal be the X direction, the direction perpendicular to the X direction in the vertical view be the Y direction, and one side of the X direction be the first side of the X direction. The first protective member has a structure in which the first movable side hanging portion and the first fixed side hanging portion are arranged in the Y direction, and the bending direction of the first connecting portion is restricted to a direction along the Y direction when viewed in the vertical direction. Both the first movable side hanging part and the first fixed side hanging part are positioned on the first side in the X direction with respect to the first and second lifting trajectories. 、 The second cable connected to the second lifting body, The present invention further comprises a second protective member that houses the second cable, The support column is positioned on the first side in the X direction with respect to the first and second lifting trajectories, The first protective member is positioned on the first side in the Y direction relative to the support column, which is one side in the Y direction. The second protective member is positioned on the second side in the Y direction, which is the other side in the Y direction relative to the support column. The second protective member comprises a second movable end connected to the second lifting body, a second fixed end connected to the support column or a second fixed member whose position relative to the support column is fixed, a second movable side hanging portion hanging downward from the second movable end, a second fixed side hanging portion hanging downward from the second fixed end, and a second connecting portion that is bent to protrude downward and connects the lower ends of the second movable side hanging portion and the second fixed side hanging portion. The second fixed side hanging portion is positioned on the first side in the X direction with respect to the first and second lifting trajectories, The second protective member has a structure in which the second movable hanging portion and the second fixed hanging portion are arranged so as to be aligned in the X direction, and the bending direction of the second connecting portion is restricted to a direction along the X direction when viewed in the vertical direction. is at a point.

[0008] According to this characteristic configuration, even when the first protection member swings due to the lifting and lowering of the first lifting body, the swing in the X direction is restricted, so that it is possible to avoid the first protection member from moving toward the lifting trajectory of the second lifting body. Therefore, in a configuration including a first cable connected to the first lifting body and a first protection member that houses the first cable, the possibility that the first protection member interferes with the second lifting body below the first lifting body can be suppressed to a low level. Furthermore, this feature configuration allows the first protective member and the second protective member to be positioned at different locations in the Y direction, with the support column in between. This makes it easier to simplify the structure for connecting the first fixed end and the second fixed end to the support column or a member whose position relative to the support column is fixed. Furthermore, this configuration allows the elements necessary for raising and lowering the first and second lifting bodies to be concentrated on the first side in the X direction relative to the first and second lifting trajectories. Therefore, the components of the lifting device can be arranged efficiently, and the lifting device can be made more compact.

Brief Description of the Drawings

[0009] [Figure 1] Perspective view of the lifting device according to the embodiment [Figure 2] Perspective view showing a part of the configuration of the lifting device according to the embodiment [Figure 3] Plan view of one lifting device according to the embodiment [Figure 4] Plan view of the other lifting device according to the embodiment

Modes for Carrying Out the Invention

[0010] Hereinafter, the lifting device 100 according to the embodiment will be described with reference to the drawings.

[0011] As shown in FIG. 1, in the present embodiment, the lifting device 100 is installed in an article storage facility including a storage facility F for storing a plurality of objects to be conveyed W. The storage facility F includes a plurality of storage parts Fa arranged side by side in the vertical direction Z, each of which is configured to be able to store the object to be conveyed W. In the present embodiment, each of the plurality of storage parts Fa includes a roller conveyor for transferring the object to be conveyed W to and from an article transport cart, and the roller conveyor is shown in the drawing. Note that the vertical direction Z coincides with the vertical direction.

[0012] Here, a specific direction along the horizontal direction is defined as the "X direction", and a direction orthogonal to the X direction in a vertical view along the vertical direction Z is defined as the "Y direction". These X direction and Y direction are respectively indicated by arrows marked with "X" and "Y" in the drawing.

[0013] In addition, in the present embodiment, a pair of lifting devices 100 are provided for one storage facility F. Hereinafter, for convenience of explanation, one of the pair of lifting devices 100 is referred to as the "first lifting device 100A", and the other is referred to as the "second lifting device 100B".

[0014] The first lifting device 100A and the second lifting device 100B are arranged side by side in the X direction. And the first lifting device 100A and the second lifting device 100B are arranged adjacent to the storage facility F in the Y direction. Also, the first lifting device 100A and the second lifting device 100B have the same configuration as each other, and are arranged to be mirror-symmetrical with respect to a plane orthogonal to the X direction. Therefore, hereinafter, unless otherwise specifically described, only the first lifting device 100A will be described, and the description of the second lifting device 100B will be omitted.

[0015] As shown in FIGS. 1 and 2, the first lifting device 100A includes a column 1, a first lifting body 2, a second lifting body 3, a first cable 4 (see FIG. 2), and a first protection member 5. In the present embodiment, the lifting device 100 further includes a second cable 6 (see FIG. 2) and a second protection member 7.

[0016] As shown in Figure 1, the support column 1 is arranged along the vertical direction Z. The support column 1 is erected on the floor surface of the goods storage facility.

[0017] The first lifting body 2 is configured to move up and down along the support column 1. In this embodiment, the first lifting body 2 is configured to stop at a position in the vertical direction Z corresponding to one of the multiple storage sections Fa in the storage facility F. In this embodiment, the first lifting body 2 is connected to a first lifting belt 21 provided along the support column 1. The first lifting belt 21 is wrapped around first pulleys (not shown) located at the upper and lower parts of the support column 1, respectively. The first pulley located at the lower part of the support column 1 is rotationally driven by a first lifting drive device 22 such as a motor, causing the first lifting body 2 to move up and down via the first lifting belt 21.

[0018] In this embodiment, the first lifting body 2 is configured to lift and lower the object W to be transported. In this embodiment, the first lifting body 2 is equipped with a first support portion 23.

[0019] The first support section 23 is configured to support the object to be conveyed W. In this embodiment, the first support section 23 is a belt conveyor configured to convey the object to be conveyed W in the Y direction and transfer the object to be conveyed W between one of the multiple storage sections Fa. In this embodiment, the first support section 23 as a belt conveyor is driven by the first transfer drive section 24. The first transfer drive section 24 is a motor that rotates the roller around which the belt is wound in the first support section 23 as a belt conveyor.

[0020] The second lifting body 3 is configured to move up and down along the support column 1. The second lifting body 3 is located below the first lifting body 2. In this embodiment, the second lifting body 3 is configured to stop at a position in the vertical direction Z corresponding to one of the multiple storage sections Fa in the storage facility F. In this embodiment, the second lifting body 3 is connected to a second lifting belt 31 provided along the support column 1. The second lifting belt 31 is positioned adjacent to the first lifting belt 21 in the Y direction. The second lifting belt 31 is wrapped around second pulleys (not shown) located at the upper and lower parts of the support column 1, respectively. The second pulley located at the lower part of the support column 1 is rotationally driven by a second lifting drive device 32 such as a motor, causing the second lifting body 3 to move up and down via the second lifting belt 31.

[0021] In this embodiment, the second lifting body 3 is configured to lift and lower the object W to be transported. In this embodiment, the second lifting body 3 includes a second support unit 33 and a second transfer drive unit 34.

[0022] The second support section 33 is configured to support the object to be conveyed W. In this embodiment, the second support section 33 is a belt conveyor configured to convey the object to be conveyed W in the Y direction and transfer the object to be conveyed W between any of the multiple storage sections Fa. In this embodiment, the second support section 33 as a belt conveyor is driven by a second transfer drive section 34. The second transfer drive section 34 is a motor that rotates the roller around which the belt in the second support section 33 as a belt conveyor is wound.

[0023] The first cable 4 (see Figure 2) is a cable connected to the first lifting body 2. In this embodiment, the first cable 4 includes at least one of a power line for transmitting power to the first transfer drive unit 24 and a signal line for transmitting electrical signals to the first transfer drive unit 24.

[0024] The second cable 6 (see Figure 2) is a cable connected to the second lifting body 3. In this embodiment, the second cable 6 includes at least one of a power line for transmitting power to the second transfer drive unit 34 and a signal line for transmitting electrical signals to the second transfer drive unit 34.

[0025] The first protective member 5 is a member that houses the first cable 4. The second protective member 7 is a member that houses the second cable 6. In this embodiment, the first protective member 5 and the second protective member 7 are each cable carriers. The cable carrier comprises a plurality of link bodies linearly connected to each other so as to be able to swing freely, and a housing space for housing cables such as the first cable 4 and the second cable 6 is formed along the extending direction of the cable carrier, which is defined by the direction in which the plurality of link bodies are arranged. The cable carrier is configured such that when bent, adjacent link bodies in the extending direction come into contact with each other so that the radius of curvature of the bent portion does not fall below a specified value. This makes it possible to avoid the cables housed in the cable carrier bending below an allowable radius of curvature.

[0026] As shown in Figure 2, the first protective member 5 comprises a first movable end 51, a first fixed end 52, a first movable side hanging portion 53, a first fixed side hanging portion 54, and a first connecting portion 55.

[0027] The first movable end 51 is one of the two ends of the first protective member 5 in its extending direction. The first movable end 51 is connected to the first lifting body 2. In this embodiment, the first movable end 51 is connected to the first lifting body 2 via a plate-shaped first connecting member 25.

[0028] The first fixed end 52 is the other of the two ends of the first protective member 5 in its extending direction. The first fixed end 52 is connected to the support column 1, or to a first fixing member 11 whose position relative to the support column 1 is fixed. In this embodiment, the first fixed end 52 is fixed to the support column 1 via a plate-shaped first fixing member 11.

[0029] The first movable side hanging portion 53 hangs downward from the first movable end portion 51. The first fixed side hanging portion 54 hangs downward from the first fixed end portion 52. The first connecting portion 55 is bent so as to protrude downward, connecting the lower ends of the first movable side hanging portion 53 and the first fixed side hanging portion 54.

[0030] As the first lifting body 2 moves up and down, the position of the first connecting part 55 in the vertical Z direction changes, and the dimensions of the first movable side hanging part 53 and the first fixed side hanging part 54 in the vertical Z direction change. To elaborate, when the first lifting body 2 rises, the first connecting part 55 moves upward, increasing the vertical Z dimension of the first movable side hanging part 53 and decreasing the vertical Z dimension of the first fixed side hanging part 54. On the other hand, when the first lifting body 2 descends, the first connecting part 55 moves downward, decreasing the vertical Z dimension of the first movable side hanging part 53 and increasing the vertical Z dimension of the first fixed side hanging part 54.

[0031] The first protective member 5 is arranged such that the first movable side hanging portion 53 and the first fixed side hanging portion 54 are aligned in the Y direction. The first protective member 5 has a structure in which the bending direction of the first connecting portion 55 is restricted to a direction along the Y direction when viewed in the vertical direction. Therefore, the first protective member 5 swings in the direction along the Y direction due to the raising and lowering of the first lifting body 2, while swinging in the direction along the X direction is restricted. Hereinafter, in this application, "direction along a specific direction" includes not only directions parallel to the specific direction but also directions that intersect the specific direction within a predetermined angle range (for example, 20° or less).

[0032] As described above, in this embodiment, the first protective member 5 is a cable carrier comprising a plurality of link bodies linearly connected to each other so as to be able to swing freely. Therefore, in this embodiment, the pivot axis of each link body in the first protective member 5 is arranged to extend in a direction along the X direction.

[0033] The second protective member 7 includes a second movable end 71, a second fixed end 72, a second movable side hanging portion 73, a second fixed side hanging portion 74, and a second connecting portion 75.

[0034] The second movable end 71 is one of the two ends of the second protective member 7 in its extending direction. The second movable end 71 is connected to the second lifting body 3. In this embodiment, the second movable end 71 is connected to the second lifting body 3 via a plate-shaped second connecting member 35.

[0035] The second fixed end 72 is the other of the two ends of the second protective member 7 in the extending direction. The second fixed end 72 is connected to the support column 1, or to a second fixing member 12 whose position relative to the support column 1 is fixed. In this embodiment, the second fixed end 72 is fixed to the support column 1 via a plate-shaped second fixing member 12.

[0036] The second movable side hanging portion 73 hangs downward from the second movable end portion 71. The second fixed side hanging portion 74 hangs downward from the second fixed end portion 72. The second connecting portion 75 is bent so as to protrude downward, connecting the lower ends of the second movable side hanging portion 73 and the second fixed side hanging portion 74.

[0037] As the second lifting body 3 moves up and down, the position of the second connecting part 75 in the vertical Z direction changes, and the dimensions of the second movable side hanging part 73 and the second fixed side hanging part 74 in the vertical Z direction change. To elaborate, when the second lifting body 3 rises, the second connecting part 75 moves upward, increasing the vertical Z dimension of the second movable side hanging part 73 and decreasing the vertical Z dimension of the second fixed side hanging part 74. On the other hand, when the second lifting body 3 descends, the second connecting part 75 moves downward, decreasing the vertical Z dimension of the second movable side hanging part 73 and increasing the vertical Z dimension of the second fixed side hanging part 74.

[0038] In this embodiment, the second protective member 7 is arranged such that the second movable hanging portion 73 and the second fixed hanging portion 74 are aligned in the X direction. The second protective member 7 has a structure in which the bending direction of the second connecting portion 75 is restricted to the direction along the X direction when viewed from above. Therefore, in this embodiment, the second protective member 7 swings in the direction along the X direction due to the raising and lowering of the second lifting body 3, while swinging in the direction along the Y direction is restricted.

[0039] As described above, in this embodiment, the second protective member 7 is a cable carrier comprising a plurality of link bodies linearly connected to each other so as to be able to swing freely. Therefore, in this embodiment, the pivot axis of each link body in the second protective member 7 is arranged to extend in a direction along the Y direction.

[0040] In the following explanation, for both the first lifting device 100A and the second lifting device 100B, one side in the X direction will be referred to as "X direction first side X1," and the other side in the X direction will be referred to as "X direction second side X2." Furthermore, one side in the Y direction will be referred to as "Y direction first side Y1," and the other side in the Y direction will be referred to as "Y direction second side Y2."

[0041] As shown in Figure 3, both the first movable hanging portion 53 and the first fixed hanging portion 54 are positioned on the first side X1 in the X direction with respect to the first lifting trajectory T1 and the second lifting trajectory T2. The first lifting trajectory T1 is the lifting trajectory of the first lifting body 2. The second lifting trajectory T2 is the lifting trajectory of the second lifting body 3. The first lifting trajectory T1 and the second lifting trajectory T2 overlap in a vertical view along the vertical direction Z. In this embodiment, the first lifting trajectory T1 is the lifting trajectory of the first support portion 23, and the second lifting trajectory T2 is the lifting trajectory of the second support portion 33. Furthermore, the first lifting trajectory T1 and the second lifting trajectory T2 coincide in a vertical view along the vertical direction Z. Here, regarding the arrangement of the two elements, "overlapping in a specific viewing direction" means that when a virtual line parallel to the line of sight is moved in each direction perpendicular to that virtual line, there exists at least a portion of the region where the virtual line intersects both elements.

[0042] In this embodiment, the support column 1 is positioned on the first side X1 in the X direction with respect to the first and second lifting trajectories T1 and T2. The first protective member 5 is positioned on the first side Y1 in the Y direction with respect to the support column 1, and the second protective member 7 is positioned on the second side Y2 in the Y direction with respect to the support column 1.

[0043] In this embodiment, the first movable hanging portion 53 is positioned on the first side Y1 in the Y direction relative to the first fixed hanging portion 54. In this example, the first movable hanging portion 53 and the first fixed hanging portion 54 are positioned parallel to each other in the Y direction.

[0044] In this embodiment, the second fixed-side hanging portion 74 is positioned on the first side X1 in the X direction with respect to the first and second lifting trajectories T1 and T2. The second movable-side hanging portion 73 is positioned on the first side X1 in the X direction with respect to the first and second lifting trajectories T1 and T2, and on the second side X2 in the X direction with respect to the second fixed-side hanging portion 74. In this example, the second movable-side hanging portion 73 and the second fixed-side hanging portion 74 are positioned side by side so as to be parallel to the X direction.

[0045] In this embodiment, the second movable side hanging portion 73 is positioned below the first lifting trajectory T1. Therefore, even if the second protective member 7 swings in a direction along the X direction due to the lifting or lowering of the second lifting body 3, the possibility of the second protective member 7 interfering with the first lifting body 2 can be kept low.

[0046] In this embodiment, the first lifting body 2 is positioned such that the first lifting trajectory T1 is located on the second side Y2 in the Y direction relative to the storage facility F. The first protective member 5 is also positioned on the second side Y2 in the Y direction relative to the storage facility F. In this example, both the first lifting trajectory T1 and the second lifting trajectory T2 are located on the second side Y2 in the Y direction relative to the storage facility F.

[0047] In this embodiment, the lifting device 100 further includes a guide member 8. The guide member 8 is formed to extend along the vertical direction Z (see Figures 1 and 2). The guide member 8 is positioned between the first protective member 5 and the storage equipment F in the Y direction. In this embodiment, the guide member 8 is a plate-shaped member fixed to the storage equipment F.

[0048] The guide member 8 has an opposing surface 8a that faces the first protective member 5 from the first side Y1 in the Y direction. Preferably, the opposing surface 8a is located within a range in the vertical direction Z that corresponds to the range of movement in the vertical direction Z of the first connecting portion 55 as the first lifting body 2 moves up and down. In this embodiment, the opposing surface 8a is formed continuously in the vertical direction Z.

[0049] In this embodiment, the second lifting body 3 is positioned such that the second lifting trajectory T2 is located on the first side Y1 in the Y direction with respect to a structure S erected on the floor surface (in this case, the floor surface of the goods storage facility). In this example, both the first lifting trajectory T1 and the second lifting trajectory T2 are located on the first side Y1 in the Y direction with respect to the structure S. The structure S is, for example, a storage facility similar to the storage facility F, a walkway where workers can walk, a conveying device for transporting objects W, various manufacturing equipment, etc.

[0050] As described above, in this embodiment, the first lifting device 100A and the second lifting device 100B are arranged so as to be symmetrical with respect to a plane perpendicular to the X direction. Therefore, as shown in Figure 4, the first side X1 and the second side X2 in the X direction of the second lifting device 100B are in the opposite direction to the first side X1 and the second side X2 in the X direction of the first lifting device 100A (see Figure 3).

[0051] [Other Embodiments] (1) In the above embodiment, a configuration in which the first protective member 5 and the second protective member 7 are each cable carriers was described as an example. However, the configuration is not limited to such a configuration, and for example, at least one of the first protective member 5 and the second protective member 7 may be a protective sheet that bundles multiple cables in a line. Also, at least one of the first cable 4 and the first protective member 5 and the second cable 6 and the second protective member 7 may be configured as a flat cable. In this case, the covering material of the flat cable corresponds to the first protective member 5 and the second protective member 7.

[0052] (2) In the above embodiment, a configuration was described as in which the radius of curvature of the curved portion of each of the first protective member 5 and the second protective member 7 is limited so as not to be less than a specified value. However, the configuration is not limited to such a configuration, and for example, each of the first protective member 5 and the second protective member 7 may be configured to bend in a V shape.

[0053] (3) In the above embodiment, a configuration in which the support column 1 is erected on the floor surface of the goods storage facility was described as an example. However, the configuration is not limited to such a configuration, and for example, the support column 1 may be the mast of a stacker crane installed in the goods storage facility.

[0054] (4) In the above embodiment, a configuration was described as in which the first fixed end 52 is fixed to the support column 1 via a plate-shaped first fixing member 11 and the second fixed end 72 is fixed to the support column 1 via a plate-shaped second fixing member 12. However, the configuration is not limited to such a configuration. For example, when the support column 1 is erected on the floor, the first fixing member 11 and the second fixing member 12 may each be shelves, conveyors, etc., fixed to the floor, with the first fixed end 52 fixed to the first fixing member 11 and the second fixed end 72 fixed to the second fixing member 12.

[0055] (5) In the above embodiment, a configuration in which the first lifting trajectory T1 and the second lifting trajectory T2 coincide in a vertical view along the vertical direction Z was described as an example. However, the configuration is not limited to such a configuration, and the first lifting trajectory T1 and the second lifting trajectory T2 may be offset in at least one of the X and Y directions such that they partially overlap in a vertical view along the vertical direction Z.

[0056] (6) In the above embodiment, a configuration in which the second movable side hanging part 73 is positioned on the first side X1 in the X direction with respect to the second lifting trajectory T2 was described as an example. However, the configuration is not limited to such a configuration, and the second movable side hanging part 73 may be positioned so as to overlap the second lifting trajectory T2 in a vertical view along the vertical direction Z.

[0057] (7) In the above embodiment, the second protective member 7 was described as having a configuration in which the second movable hanging portion 73 and the second fixed hanging portion 74 are aligned in the X direction. However, the configuration is not limited to this, and the second movable hanging portion 73 and the second fixed hanging portion 74 may be aligned in the Y direction.

[0058] (8) In the above embodiment, the second protective member 7 was described as having a structure in which the bending direction of the second connecting portion 75 is restricted to a direction along the X direction when viewed in the vertical direction. However, the embodiment is not limited to such a configuration, and for example, the second protective member 7 may have a structure in which the bending direction of the second connecting portion 75 is not restricted and can bend in all directions.

[0059] (9) In the above embodiment, a configuration was described as in which the first movable hanging part 53 and the first fixed hanging part 54 are positioned on the first side Y1 in the Y direction relative to the first fixed hanging part 54, so that the first movable hanging part 53 and the first fixed hanging part 54 are parallel to the Y direction. However, the configuration is not limited to such a configuration, and it is sufficient for the first fixed hanging part 54 to be positioned on either side in the Y direction relative to the first movable hanging part 53.

[0060] (10) In the above embodiment, a configuration was described as in which the second movable hanging portion 73 and the second fixed hanging portion 74 are positioned on the second side X2 in the X direction relative to the second fixed hanging portion 74, so that the second movable hanging portion 73 and the second fixed hanging portion 74 are parallel to the X direction. However, the configuration is not limited to such a configuration, and it is sufficient for the second fixed hanging portion 74 to be positioned on either side in the X direction relative to the second movable hanging portion 73.

[0061] (11) In the above embodiment, a configuration in which the guide member 8 is fixed to the storage facility F was described as an example. However, the configuration is not limited to such a configuration, and for example, the guide member 8 may be fixed to the support column 1.

[0062] (12) In the above embodiment, a configuration in which the opposing surface 8a of the guide member 8 is formed continuously in the vertical direction Z was described as an example. However, the configuration is not limited to such a configuration, and the opposing surface 8a may be arranged intermittently in the vertical direction Z.

[0063] (13) The configurations disclosed in each of the embodiments described above can be applied in combination with configurations disclosed in other embodiments, as long as no inconsistencies arise. With regard to other configurations, the embodiments disclosed herein are merely illustrative in all respects. Therefore, various modifications can be made as appropriate without departing from the spirit of this disclosure.

[0064] [Summary of this embodiment] The following section will provide an overview of the lifting device described above.

[0065] The lifting device is Support columns arranged along the vertical direction, A first lifting body that moves up and down along the aforementioned support column, A second lifting body that moves up and down along the support column below the first lifting body, The first cable connected to the first lifting body, A lifting device comprising a first protective member for housing the first cable, The first protective member comprises a first movable end connected to the first lifting body, a first fixed end connected to the support column or a first fixed member whose position relative to the support column is fixed, a first movable side hanging portion hanging downward from the first movable end, a first fixed side hanging portion hanging downward from the first fixed end, and a first connecting portion that is bent to protrude downward and connects the lower ends of the first movable side hanging portion and the first fixed side hanging portion. The first lifting trajectory, which is the lifting trajectory of the first lifting body, and the second lifting trajectory, which is the lifting trajectory of the second lifting body, overlap in a vertical view along the vertical direction. Let the specific direction along the horizontal be the X direction, the direction perpendicular to the X direction in the vertical view be the Y direction, and one side of the X direction be the first side of the X direction. The first protective member has a structure in which the first movable side hanging portion and the first fixed side hanging portion are arranged in the Y direction, and the bending direction of the first connecting portion is restricted to a direction along the Y direction when viewed in the vertical direction. Both the first movable side hanging part and the first fixed side hanging part are positioned on the first side in the X direction with respect to the first and second lifting trajectories.

[0066] With this configuration, even if the first protective member sways due to the raising or lowering of the first elevator, the swaying in the X direction is limited, thus preventing the first protective member from moving towards the raising or lowering trajectory of the second elevator. Therefore, in a configuration comprising a first cable connected to the first elevator and a first protective member housing the first cable, the possibility of the first protective member interfering with the second elevator, which is lower than the first elevator, can be kept low.

[0067] Here, the second cable connected to the second lifting body, The present invention further comprises a second protective member that houses the second cable, The support column is positioned on the first side in the X direction with respect to the first and second lifting trajectories, The first protective member is positioned on the first side in the Y direction relative to the support column, which is one side in the Y direction. The second protective member is positioned on the second side in the Y direction, which is the other side in the Y direction relative to the support column. The second protective member comprises a second movable end connected to the second lifting body, a second fixed end connected to the support column or a second fixed member whose position relative to the support column is fixed, a second movable side hanging portion hanging downward from the second movable end, a second fixed side hanging portion hanging downward from the second fixed end, and a second connecting portion that is bent to protrude downward and connects the lower ends of the second movable side hanging portion and the second fixed side hanging portion. The second fixed-side hanging portion is preferably positioned on the first side in the X direction with respect to the first and second lifting trajectories.

[0068] This configuration allows the first protective member and the second protective member to be positioned at different locations in the Y direction, with the support column in between. This makes it easier to simplify the structure for connecting the first fixed end and the second fixed end to the support column or a member whose position relative to the support column is fixed. Furthermore, this configuration allows the elements necessary for raising and lowering the first and second lifting bodies to be concentrated on the first side in the X direction relative to the first and second lifting trajectories. Therefore, the components of the lifting device can be arranged efficiently, and the lifting device can be made more compact.

[0069] Furthermore, the second lifting body is positioned such that the second lifting trajectory is located on the first side in the Y direction with respect to a structure erected on the floor surface. Preferably, the second protective member has a structure in which the second movable hanging portion and the second fixed hanging portion are arranged in the X direction, and the bending direction of the second connecting portion is restricted to a direction along the X direction when viewed in the vertical direction.

[0070] With this configuration, even if the second protective member sways due to the raising or lowering of the second lifting body, the sway in the Y direction is limited. Therefore, the possibility of the second protective member swaying to the second side in the Y direction and interfering with structures erected on the floor surface can be kept low.

[0071] Furthermore, the first lifting body and the second lifting body are configured to lift and transport an object to be transported. The first lifting body is positioned such that the first lifting trajectory is located on the second side in the Y direction with respect to the storage facility that stores a plurality of the objects to be transported. The first protective member is positioned on the second side in the Y direction relative to the storage equipment, Preferably, the system further includes a guide member which is arranged to extend along the vertical direction between the first protective member and the storage equipment in the Y direction, and which has a facing surface that faces the first protective member from the first side in the Y direction.

[0072] With this configuration, even if the first protective member swings to the first side in the Y direction due to the raising and lowering of the first elevator, the opposing surfaces of the guide member positioned between the first protective member and the storage equipment in the Y direction prevent the first protective member from moving towards the raising and lowering trajectory of the second elevator. Therefore, the possibility of the first protective member interfering with the storage equipment can be kept low. [Industrial applicability]

[0073] The technology disclosed herein can be used in a lifting device comprising a support column arranged vertically, a first lifting body that moves up and down along the support column, and a second lifting body that moves up and down along the support column below the first lifting body. [Explanation of symbols]

[0074] 100: Lifting device 1: Strut 11: First fixing member 12: Second fixing member 2: First elevator 3: Second elevator 4: First cable 5: First protective member 51: 1st moving end 52: 1st fixed end 53: 1st moving side hanging part 54: 1st fixed side hanging part 55: First connection section 6: Second cable 7: Second protective member 71: 2nd moving end 72:Second fixed end 73: 2nd moving side hanging part 74: 2nd fixed side hanging part 75: Second connection section 8: Guide member 8a: Opposing surface F:Storage equipment S: Structure W: Object to be transported X :X direction X1: 1st side in X direction X2: The second side in the X direction Y:Y direction Y1: The first side in the Y direction Y2: The second side in the Y direction Z: Up / Down direction

Claims

1. Support columns arranged along the vertical direction, A first lifting body that moves up and down along the aforementioned support column, A second lifting body that moves up and down along the support column below the first lifting body, The first cable connected to the first lifting body, A lifting device comprising a first protective member for housing the first cable, The first protective member comprises a first movable end connected to the first lifting body, a first fixed end connected to the support column or a first fixed member whose position relative to the support column is fixed, a first movable side hanging portion hanging downward from the first movable end, a first fixed side hanging portion hanging downward from the first fixed end, and a first connecting portion that is bent to protrude downward and connects the lower ends of the first movable side hanging portion and the first fixed side hanging portion. The first lifting trajectory, which is the lifting trajectory of the first lifting body, and the second lifting trajectory, which is the lifting trajectory of the second lifting body, overlap in a vertical view along the vertical direction. Let the specific direction along the horizontal be the X direction, the direction perpendicular to the X direction in the vertical view be the Y direction, and one side of the X direction be the first side of the X direction. The first protective member has a structure in which the first movable side hanging portion and the first fixed side hanging portion are arranged in the Y direction, and the bending direction of the first connecting portion is restricted to a direction along the Y direction when viewed in the vertical direction. Both the first movable side hanging part and the first fixed side hanging part are positioned on the first side in the X direction with respect to the first and second lifting trajectories, The second cable connected to the second lifting body, The present invention further comprises a second protective member that houses the second cable, The support column is positioned on the first side in the X direction with respect to the first and second lifting trajectories, The first protective member is positioned on the first side in the Y direction relative to the support column, which is one side in the Y direction. The second protective member is positioned on the second side in the Y direction, which is the other side in the Y direction relative to the support column. The second protective member comprises a second movable end connected to the second lifting body, a second fixed end connected to the support column or a second fixed member whose position relative to the support column is fixed, a second movable side hanging portion hanging downward from the second movable end, a second fixed side hanging portion hanging downward from the second fixed end, and a second connecting portion that is bent to protrude downward and connects the lower ends of the second movable side hanging portion and the second fixed side hanging portion. The second fixed side hanging portion is positioned on the first side in the X direction with respect to the first and second lifting trajectories, The lifting device has a structure in which the second protective member is arranged such that the second movable side hanging portion and the second fixed side hanging portion are aligned in the X direction, and the bending direction of the second connecting portion is restricted to a direction along the X direction when viewed in the vertical direction.

2. The lifting device according to claim 1, wherein the second lifting body is positioned such that the second lifting trajectory is located on the first side in the Y direction with respect to a structure erected on the floor surface.

3. Each of the first and second lifting bodies is configured to lift and transport an object to be transported. The first lifting body is positioned such that the first lifting trajectory is located on the second side in the Y direction with respect to the storage facility that stores a plurality of objects to be transported. The first protective member is positioned on the second side in the Y direction relative to the storage equipment. The lifting device according to claim 1 or 2, further comprising a guide member which is arranged to extend along the vertical direction between the first protective member and the storage equipment in the Y direction, and which has a facing surface that faces the first protective member from the first side in the Y direction.

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