Elevating device

Abstract

In an elevating device (100), a first elevating trajectory (T1), which is an elevating trajectory of a first elevating body (2), and a second elevating trajectory (T2), which is an elevating trajectory of a second elevating body, overlap each other when viewed in the vertical direction. A first protective member (5) is disposed such that a first moving-side hanging part (53) hanging from a first moving end (51) and a first fixed-side hanging part (54) hanging from a first fixing end (52) are aligned in the Y direction, and a bending direction of a first connection part, which is bent in a manner projecting downward and connects the lower ends of the first moving-side hanging part (53) and the first fixed-side hanging part (54), is restricted along the Y-direction when viewed in the vertical direction. The first moving-side hanging part (53) and the first fixed-side hanging part (54) are arranged on one side (X1) in the X-direction with respect to the first elevating trajectory (T1) and the second elevating trajectory (T2).

Description

Elevating device

[0001] The present invention relates to a lifting device that includes a support pillar arranged in the vertical direction, a first lifting body that rises and falls along the support pillar, and a second lifting body that rises and falls along the support pillar below the first lifting body.

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

[0003] Furthermore, the following Patent Document 2 discloses a lifting device including a support (7) arranged along the vertical direction, a lifting body (10) that rises and falls along the support, a cable (13) connected to the lifting body, and a protective member (17) that houses the cable. The reference numerals in parentheses are those in Patent Document 2.

[0004] US Patent Application Publication No. 2018 / 0208397 JP 07-2307

[0005] Incidentally, 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 protective member that houses the first cable. However, with this configuration, if the first protective member swings toward the lifting trajectory of the second lifting body due to the lifting or lowering of the first lifting body, there is a possibility that the first protective member will interfere with the second lifting body.

[0006] Therefore, it is desirable to realize a lifting device that has a configuration including a first cable connected to a first lifting body and a first protective member that houses the first cable, and that can reduce the possibility of the first protective member interfering with a second lifting body that is below the first lifting body.

[0007] In view of the above, a characteristic configuration of a lifting device includes: a support arranged in a vertical direction; a first lifting body that moves up and down along the support; a second lifting body that moves up and down along the support below the first lifting body; a first cable connected to the first lifting body; and a first protective member that houses the first cable, wherein the first protective member includes a first moving end connected to the first lifting body, a first fixed end connected to the support or a first fixed member whose position relative to the support is fixed, a first moving-side hanging portion hanging downward from the first moving end, a first fixed-side hanging portion hanging downward from the first fixed end, and a first connecting portion that bends to protrude downward and connects lower ends of the first moving-side hanging portion and the first fixed-side hanging portion, a first lifting trajectory that is the lifting trajectory of the first lifting body and a second lifting trajectory that is the lifting trajectory of the second lifting body overlap in an up-down view along the up-down direction; a specific direction along the horizontal direction is defined as the X direction, a direction perpendicular to the X direction in the up-down view is defined as the Y direction, and one side of the X direction is defined as a first side in the X direction; the first protective member is arranged so that the first moving-side hanging portion and the first fixed-side hanging portion are aligned in the Y direction, and has a structure in which the bending direction of the first connection portion is limited to a direction along the Y direction in the up-down view; and both the first moving-side hanging portion and the first fixed-side hanging portion are arranged on the first side in the X direction with respect to the first lifting trajectory and the second lifting trajectory.

[0008] According to this characteristic configuration, even if the first protective member sways due to the elevation of the first lifting body, the swaying in the X direction is limited, and the first protective member can be prevented from moving toward the elevation trajectory of the second lifting body. Therefore, in a configuration including a first cable connected to the first lifting body and a first protective member that houses the first cable, it is possible to reduce the possibility that the first protective member will interfere with the second lifting body that is below the first lifting body.

[0009] 1 is a perspective view of a lifting device according to an embodiment; 2 is a perspective view showing a partial configuration of a lifting device according to an embodiment; 3 is a plan view of one lifting device according to an embodiment; and 4 is a plan view of the other lifting device according to an embodiment.

[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 this embodiment, the lifting device 100 is installed in an item storage facility that includes a storage facility F that stores a plurality of objects W to be transported. The storage facility F includes a plurality of storage sections Fa that are arranged side by side in the vertical direction Z and are each configured to store an object W to be transported. In this embodiment, each of the storage sections Fa includes a roller conveyor for transferring the object W to and from an item transport cart (not shown), and the roller conveyor is shown in the figure. The vertical direction Z coincides with the vertical direction.

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

[0013] In this embodiment, a pair of lifting devices 100 is provided for one storage facility F. Hereinafter, for ease of explanation, one of the pair of lifting devices 100 will be referred to as a "first lifting device 100A" and the other as a "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. The first lifting device 100A and the second lifting device 100B are arranged adjacent to each other in the Y direction with respect to the storage facility F. The first lifting device 100A and the second lifting device 100B have similar configurations and are arranged symmetrically with respect to a plane perpendicular to the X direction. Therefore, hereinafter, only the first lifting device 100A will be described, and a description of the second lifting device 100B will be omitted unless otherwise specified.

[0015] 1 and 2, the first lifting device 100A includes a support 1, a first lifting body 2, a second lifting body 3, a first cable 4 (see FIG. 2), and a first protective member 5. In this embodiment, the lifting device 100 further includes a second cable 6 (see FIG. 2) and a second protective member 7.

[0016] As shown in Fig. 1, the support pillar 1 is arranged along the vertical direction Z. The support pillar 1 stands on the floor surface of the item 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 wound around first pulleys (not shown) arranged at the top and bottom of the support column 1. The first pulley arranged at the bottom 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 transport the transport object W. In this embodiment, the first lifting body 2 includes a first support part 23 and a first transfer driving part 24.

[0019] The first support unit 23 is configured to support the transport object W. In this embodiment, the first support unit 23 is a belt conveyor configured to transport the transport object W in the Y direction and transfer the transport object W between the first support unit 23 and any of the multiple storage units Fa. In this embodiment, the first support unit 23 serving as a belt conveyor is driven by a first transfer drive unit 24. The first transfer drive unit 24 is a motor that rotates and drives rollers around which a belt is wound in the first support unit 23 serving as a belt conveyor.

[0020] The second lifting body 3 is configured to rise and fall along the support column 1. The second lifting body 3 is arranged lower than the first lifting body 2. In this embodiment, the second lifting body 3 is configured to stop at a position in the up-down 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 arranged adjacent to the first lifting belt 21 in the Y direction. The second lifting belt 31 is wound around second pulleys (not shown) arranged at the top and bottom of the support column 1. The second pulleys arranged at the bottom of the support column 1 are rotationally driven by a second lifting drive device 32 such as a motor, thereby raising and lowering the second lifting body 3 via the second lifting belt 31.

[0021] In this embodiment, the second lifting body 3 is configured to lift and transport the transport object W. In this embodiment, the second lifting body 3 includes a second support part 33 and a second transfer driving part 34.

[0022] The second support unit 33 is configured to support the transport object W. In this embodiment, the second support unit 33 is a belt conveyor configured to transport the transport object W in the Y direction and transfer the transport object W between the second support unit 33 and any of the multiple storage units Fa. In this embodiment, the second support unit 33 serving as a belt conveyor is driven by a second transfer drive unit 34. The second transfer drive unit 34 is a motor that rotates and drives rollers around which a belt is wound in the second support unit 33 serving as a belt conveyor.

[0023] The first cable 4 (see FIG. 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 driving unit 24 and a signal line for transmitting an electrical signal to the first transfer driving unit 24.

[0024] The second cable 6 (see FIG. 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 driving unit 34 and a signal line for transmitting an electrical signal to the second transfer driving 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, each of the first protective member 5 and the second protective member 7 is a cable carrier. The cable carrier includes a plurality of link bodies that are linearly connected to each other so as to be able to swing freely, and a housing space that houses cables such as the first cable 4 and the second cable 6 is formed along the extension direction of the cable carrier, which is defined by the arrangement direction of the plurality of link bodies. The cable carrier is configured so that when bent, adjacent link bodies in the extension direction come into contact with each other, preventing the radius of curvature of the bent portion from becoming less than a specified value. This makes it possible to prevent the cable housed in the cable carrier from being bent at a radius of curvature less than the allowable radius.

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

[0027] The first moving end 51 is one of both ends in the extension direction of the first protective member 5. The first moving end 51 is connected to the first lifting body 2. In this embodiment, the first moving 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 in the extension direction of the first protective member 5. The first fixed end 52 is connected to the support 1 or a first fixing member 11 whose position relative to the support 1 is fixed. In this embodiment, the first fixed end 52 is fixed to the support 1 via the plate-shaped first fixing member 11.

[0029] First movable-side hanging portion 53 hangs downward from first movable end portion 51. First fixed-side hanging portion 54 hangs downward from first fixed end portion 52. First connecting portion 55 bends so as to protrude downward, and connects the lower ends of first movable-side hanging portion 53 and first fixed-side hanging portion 54 to each other.

[0030] As first lifting body 2 moves up and down, the position of first connection portion 55 in the up-down direction Z changes, and the respective dimensions in the up-down direction Z of first moving-side hanging portion 53 and first fixed-side hanging portion 54 change. To explain further, when first lifting body 2 moves up, first connection portion 55 moves upward, the dimension in the up-down direction Z of first moving-side hanging portion 53 increases, and the dimension in the up-down direction Z of first fixed-side hanging portion 54 decreases. On the other hand, when first lifting body 2 moves down, first connection portion 55 moves downward, the dimension in the up-down direction Z of first moving-side hanging portion 53 decreases, and the dimension in the up-down direction Z of first fixed-side hanging portion 54 increases.

[0031] First protective member 5 is arranged so that first movable-side hanging portion 53 and first fixed-side hanging portion 54 are aligned in the Y direction. First protective member 5 has a structure in which the bending direction of first connection portion 55 is limited to the direction along the Y direction when viewed in the up-down direction. Therefore, first protective member 5 swings in the Y direction due to the elevation of first lifting body 2, while swinging in the X direction is limited. Here, in this application, the term "direction along a specific direction" includes not only a direction parallel to the specific direction but also a direction intersecting the specific direction within a predetermined angle range (e.g., 20° or less).

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

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

[0034] The second moving end 71 is one of both ends in the extension direction of the second protective member 7. The second moving end 71 is connected to the second lifting body 3. In this embodiment, the second moving 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 in the extension direction of the second protective member 7. The second fixed end 72 is connected to the support 1 or a second fixing member 12 whose position relative to the support 1 is fixed. In this embodiment, the second fixed end 72 is fixed to the support 1 via the plate-shaped second fixing member 12.

[0036] Second movable-side hanging portion 73 hangs downward from second movable end portion 71. Second fixed-side hanging portion 74 hangs downward from second fixed end portion 72. Second connecting portion 75 bends so as to protrude downward, and connects the lower ends of second movable-side hanging portion 73 and second fixed-side hanging portion 74 to each other.

[0037] As second lifting body 3 moves up and down, the position of second connection portion 75 in the up-down direction Z changes, and the respective dimensions in the up-down direction Z of second moving-side hanging portion 73 and second fixed-side hanging portion 74 change. To explain further, when second lifting body 3 moves up, second connection portion 75 moves upward, the dimension in the up-down direction Z of second moving-side hanging portion 73 increases, and the dimension in the up-down direction Z of second fixed-side hanging portion 74 decreases. On the other hand, when second lifting body 3 moves down, second connection portion 75 moves downward, the dimension in the up-down direction Z of second moving-side hanging portion 73 decreases, and the dimension in the up-down direction Z of second fixed-side hanging portion 74 increases.

[0038] In this embodiment, second protective member 7 is arranged so that second movable-side hanging portion 73 and second fixed-side hanging portion 74 are aligned in the X direction. Second protective member 7 has a structure in which the bending direction of second connection portion 75 is limited to the X direction when viewed in the up-down direction. Therefore, in this embodiment, second protective member 7 swings in the X direction due to the elevation and lowering of second lift body 3, while swinging in the Y direction is limited.

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

[0040] In the following description, for each of the first lifting device 100A and the second lifting device 100B, one side in the X direction is referred to as the "first X-direction side X1," and the other side in the X direction is referred to as the "second X-direction side X2." Furthermore, one side in the Y direction is referred to as the "first Y-direction side Y1," and the other side in the Y direction is referred to as the "second Y-direction side Y2."

[0041] As shown in FIG. 3 , both first movable-side hanging portion 53 and first fixed-side hanging portion 54 are disposed on first side X1 in the X direction with respect to first lifting / lowering trajectory T1 and second lifting / lowering trajectory T2. First lifting / lowering trajectory T1 is the lifting / lowering trajectory of first lifting / lowering body 2. Second lifting / lowering trajectory T2 is the lifting / lowering trajectory of second lifting / lowering body 3. First lifting / lowering trajectory T1 and second lifting / lowering trajectory T2 overlap in a vertical view along the vertical direction Z. In this embodiment, first lifting / lowering trajectory T1 is the lifting / lowering trajectory of first support portion 23, and second lifting / lowering trajectory T2 is the lifting / lowering trajectory of second support portion 33. First lifting / lowering trajectory T1 and second lifting / lowering trajectory T2 coincide in a vertical view along the vertical direction Z. Here, with regard to the arrangement of two elements, "overlapping when viewed in a particular direction" means that when a virtual line parallel to the viewing direction is moved in each direction perpendicular to the virtual line, there is at least a partial area where the virtual line intersects with both of the two elements.

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

[0043] In the present embodiment, first moving-side hanging portion 53 is disposed on first side Y1 in the Y direction relative to first fixed-side hanging portion 54. In the present example, first moving-side hanging portion 53 and first fixed-side hanging portion 54 are disposed side by side so as to be parallel to the Y direction.

[0044] Furthermore, in the present embodiment, second fixed-side hanging portion 74 is disposed on first side X1 in the X direction with respect to first lifting trajectory T1 and second lifting trajectory T2. Second moving-side hanging portion 73 is disposed on first side X1 in the X direction with respect to first lifting trajectory T1 and second lifting trajectory T2, and on second side X2 in the X direction with respect to second fixed-side hanging portion 74. In the present example, second moving-side hanging portion 73 and second fixed-side hanging portion 74 are disposed side by side so as to be parallel to the X direction.

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

[0046] In this embodiment, the first lifting body 2 is arranged so that the first lifting trajectory T1 is located on the second side Y2 in the Y direction with respect to the storage facility F. The first protective member 5 is arranged on the second side Y2 in the Y direction with respect 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 with respect 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 up-down direction Z (see FIGS. 1 and 2). The guide member 8 is disposed between the first protection member 5 and the storage facility F in the Y direction. In this embodiment, the guide member 8 is a plate-shaped member fixed to the storage facility 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. The opposing surface 8a is preferably located within a range in the vertical direction Z that corresponds to the range of movement in the vertical direction Z of the first connection portion 55 associated with the elevation of the first lifting body 2. 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 arranged so that the second lifting trajectory T2 is located on a first side Y1 in the Y direction with respect to a structure S erected on a floor surface (here, the floor surface of the item 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 on which workers can walk, a transport device that transports the transport target W, various manufacturing devices, etc.

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

[0051] Other Embodiments (1) In the above embodiment, the first protective member 5 and the second protective member 7 are each a cable carrier. However, the present invention is not limited to such a configuration. For example, at least one of the first protective member 5 and the second protective member 7 may be a protective sheet that groups multiple cables together in a row. Furthermore, 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, the first protective member 5 and the second protective member 7 are configured such that the radius of curvature of the bent portion is limited to a predetermined value. However, the present invention is not limited to such a configuration, and each of the first protective member 5 and the second protective member 7 may be configured to be bent in a V-shape, for example.

[0053] (3) In the above embodiment, the support column 1 is erected on the floor of the storage facility. However, the present invention is not limited to such a configuration. For example, the support column 1 may be the mast of a stacker crane provided in the storage facility.

[0054] (4) In the above embodiment, an example has been described in which the first fixed end 52 is fixed to the support 1 via the plate-shaped first fixing member 11, and the second fixed end 72 is fixed to the support 1 via the plate-shaped second fixing member 12. However, the present invention is not limited to such a configuration. For example, when the support 1 is erected on the floor, the first fixed member 11 and the second fixed member 12 may each be a shelf, conveyor, or the like fixed to the floor, and the first fixed end 52 may be fixed to the first fixing member 11, and the second fixed end 72 may be fixed to the second fixing member 12.

[0055] (5) In the above embodiment, the first lifting / lowering trajectory T1 and the second lifting / lowering trajectory T2 are aligned in the up-down direction Z. However, the present invention is not limited to such a configuration, and the first lifting / lowering trajectory T1 and the second lifting / lowering trajectory T2 may be shifted in at least one of the X direction and the Y direction so as to partially overlap in the up-down direction Z.

[0056] (6) In the above embodiment, a configuration in which second moving-side hanging portion 73 is disposed on first side X1 in the X direction with respect to second lifting trajectory T2 has been described as an example. However, the present invention is not limited to such a configuration, and second moving-side hanging portion 73 may be disposed so as to overlap second lifting trajectory T2 in the up-down direction Z as viewed in the up-down direction.

[0057] (7) In the above embodiment, second protective member 7 has been described as having second movable-side hanging portion 73 and second fixed-side hanging portion 74 aligned in the X direction. However, the present invention is not limited to such a configuration, and second movable-side hanging portion 73 and second fixed-side hanging portion 74 may be aligned in the Y direction.

[0058] (8) In the above embodiment, the second protective member 7 has been described as having a structure in which the bending direction of the second connection portion 75 is limited to the direction along the X direction when viewed from the up-down direction. However, the present invention is not limited to such a structure. For example, the second protective member 7 may have a structure in which the bending direction of the second connection portion 75 is not limited and the second protective member 7 can bend in all directions.

[0059] (9) In the above embodiment, a configuration has been described as an example in which first movable-side hanging portion 53 is disposed on first side Y1 in the Y direction relative to first fixed-side hanging portion 54 so that first movable-side hanging portion 53 and first fixed-side hanging portion 54 are parallel to the Y direction. However, the present invention is not limited to such a configuration, and first fixed-side hanging portion 54 may be disposed on either side in the Y direction relative to first movable-side hanging portion 53.

[0060] (10) In the above embodiment, a configuration has been described as an example in which second movable-side hanging portion 73 is disposed on second side X2 in the X direction relative to second fixed-side hanging portion 74 so that second movable-side hanging portion 73 and second fixed-side hanging portion 74 are parallel to the X direction. However, the present invention is not limited to such a configuration, and second fixed-side hanging portion 74 may be disposed on either side in the X direction relative to second movable-side hanging portion 73.

[0061] (11) In the above embodiment, the guide member 8 is fixed to the storage facility F. However, the present invention is not limited to such a configuration, and the guide member 8 may be fixed to the support 1, for example.

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

[0063] (13) Note that the configurations disclosed in the above-described embodiments can be applied in combination with configurations disclosed in other embodiments, as long as no contradictions arise. Regarding other configurations, the embodiments disclosed in this specification are merely examples in all respects. Therefore, various modifications can be made as appropriate within the scope of the present disclosure.

[0064] Summary of the Present Embodiment The lifting device described above will now be outlined.

[0065] a first lifting body that moves up and down along the support column, a second lifting body that moves up and down along the support column below the first lifting body, a first cable connected to the first lifting body, and a first protective member that houses the first cable, wherein the first protective member comprises a first moving 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 moving-side hanging portion hanging downward from the first moving end, a first fixed-side hanging portion hanging downward from the first fixed end, and a first connecting portion that bends to protrude downward and connects lower ends of the first moving-side hanging portion and the first fixed-side hanging portion, a first lifting trajectory which is the lifting trajectory of the first lifting body and a second lifting trajectory which is the lifting trajectory of the second lifting body overlap in an up-down view along the up-down direction; a specific direction along the horizontal direction is defined as the X direction, a direction perpendicular to the X direction in the up-down view is defined as the Y direction, and one side of the X direction is defined as a first side in the X direction; the first protective member is arranged so that the first moving-side hanging portion and the first fixed-side hanging portion are aligned in the Y direction, and has a structure in which the bending direction of the first connection portion is limited to a direction along the Y direction in the up-down view; and both the first moving-side hanging portion and the first fixed-side hanging portion are arranged on the first side in the X direction with respect to the first lifting trajectory and the second lifting trajectory.

[0066] With this configuration, even if the first protective member sways due to the ascent and descent of the first lifting body, the swaying in the X direction is limited, and the first protective member can be prevented from moving toward the ascent and descent trajectory of the second lifting body. Therefore, in a configuration including a first cable connected to the first lifting body and a first protective member that houses the first cable, it is possible to reduce the possibility of the first protective member interfering with the second lifting body that is below the first lifting body.

[0067] Here, the device further includes a second cable connected to the second lifting body and a second protective member that houses the second cable, wherein the support pillar is disposed on a first side in the X direction with respect to the first lifting trajectory and the second lifting trajectory, the first protective member is disposed on a first side in the Y direction that is one side in the Y direction with respect to the support pillar, and the second protective member is disposed on a second side in the Y direction that is the other side in the Y direction with respect to the support pillar, and the second protective member includes a second moving end connected to the second lifting body, a second fixed end connected to the support pillar or a second fixed member whose position with respect to the support pillar is fixed, a second moving-side hanging portion hanging downward from the second moving end, a second fixed-side hanging portion hanging downward from the second fixed end, and a second connection portion that bends to protrude downward and connects lower ends of the second moving-side hanging portion and the second fixed-side hanging portion, It is preferable that the second fixed-side hanging portion be disposed on a first side in the X direction with respect to the first lifting / lowering locus and the second lifting / lowering locus.

[0068] With this configuration, the first protective member and the second protective member can be positioned at different positions in the Y direction across the support column. This facilitates simplifying the structure for connecting the first fixed end and the second fixed end to the support column or to a member whose position relative to the support column is fixed. Furthermore, with this configuration, the elements required for raising and lowering the first lifting body and the second lifting body can be concentrated and arranged on the first side in the X direction with respect to the first lifting trajectory and the second lifting trajectory. This facilitates efficient arrangement of the components of the lifting device and facilitates miniaturization of the lifting device.

[0069] Furthermore, it is preferable that the second lifting body is arranged so that the second lifting trajectory is located on the first side in the Y direction relative to a structure erected on a floor surface, and the second protective member is arranged so that the second moving-side hanging portion and the second fixed-side hanging portion are aligned in the X direction, and that the bending direction of the second connection portion is limited to a direction along the X direction when viewed in the up-down direction.

[0070] With this configuration, even if the second protective member sways due to the raising and lowering of the second lifting body, the shaking in the Y direction is limited, thereby reducing the possibility that the second protective member will sway to the second side in the Y direction and interfere with a structure erected on the floor surface.

[0071] Furthermore, it is preferable that each of the first lifting body and the second lifting body is configured to lift and transport the transport object, the first lifting body is arranged so that the first lifting trajectory is located on the second side in the Y direction relative to storage equipment that stores the multiple transport objects, the first protective member is arranged on the second side in the Y direction relative to the storage equipment, and is arranged so as to extend along the up-and-down direction between the first protective member and the storage equipment in the Y direction, and further includes a guide member having an opposing 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 toward the first side in the Y direction due to the elevation of the first lifting body, the opposing surface of the guide member disposed between the first protective member and the storage facility in the Y direction can prevent the first protective member from moving toward the elevation trajectory of the second lifting body. Therefore, the possibility of the first protective member interfering with the storage facility can be reduced.

[0073] The technology disclosed herein can be used in a lifting device that includes a support pillar arranged in the vertical direction, a first lifting body that rises and falls along the support pillar, and a second lifting body that rises and falls along the support pillar below the first lifting body.

[0074] 100: Elevating device 1: Support 11: First fixed member 12: Second fixed member 2: First elevating body 3: Second elevating body 4: First cable 5: First protective member 51: First moving end 52: First fixed end 53: First moving-side hanging portion 54: First fixed-side hanging portion 55: First connecting portion 6: Second cable 7: Second protective member 71: Second moving end 72: Second fixed end 73: Second moving-side hanging portion 74: Second fixed-side hanging portion 75: Second connecting portion 8: Guide member 8a: Opposing surface F: Storage facility S: Structure W: Transport object T1: First elevating trajectory T2: Second elevating trajectory X: X direction X1 : First side in the X direction X2 : Second side in the X direction Y : Y direction Y1 : First side in the Y direction Y2 : Second side in the Y direction Z : Vertical direction

Claims

1. An elevator device comprising: a support column arranged in a vertical direction; a first elevator body that moves up and down along the support column; a second elevator body that moves up and down along the support column below the first elevator body; a first cable connected to the first elevator body; and a first protective member that houses the first cable, wherein the first protective member comprises: a first moving end connected to the first elevator 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 moving-side hanging portion hanging downward from the first moving end; a first fixed-side hanging portion hanging downward from the first fixed end; and a first connecting portion that bends to protrude downward and connects the lower ends of the first moving-side hanging portion and the first fixed-side hanging portion together; a first lifting trajectory that is the lifting trajectory of the first lifting body and a second lifting trajectory that is the lifting trajectory of the second lifting body overlap in an up-down direction; a specific direction along the horizontal direction is an X direction, a direction perpendicular to the X direction in the up-down direction is a Y direction, and one side of the X direction is a first side in the X direction; the first protective member is arranged so that the first moving-side hanging portion and the first fixed-side hanging portion are aligned in the Y direction, and has a structure in which a bending direction of the first connection portion is limited to a direction along the Y direction in the up-down direction; and both the first moving-side hanging portion and the first fixed-side hanging portion are arranged on the first side in the X direction with respect to the first lifting trajectory and the second lifting trajectory.

2. A device further comprising: a second cable connected to the second lifting body; and a second protective member that houses the second cable; wherein the support pillar is disposed on a first side in the X direction with respect to the first lifting trajectory and the second lifting trajectory; the first protective member is disposed on a first side in the Y direction that is one side in the Y direction with respect to the support pillar; and the second protective member is disposed on a second side in the Y direction that is the other side in the Y direction with respect to the support pillar; and the second protective member comprises a second moving end connected to the second lifting body, a second fixed end connected to the support pillar or a second fixed member whose position with respect to the support pillar is fixed, a second moving-side hanging portion hanging downward from the second moving end, a second fixed-side hanging portion hanging downward from the second fixed end, and a second connecting portion that bends to protrude downward and connects the lower ends of the second moving-side hanging portion and the second fixed-side hanging portion together; The lifting device according to claim 1 , wherein the second fixed-side hanging portion is disposed on a first side in the X direction with respect to the first lifting locus and the second lifting locus.

3. The lifting device described in claim 2, wherein the second lifting body is arranged so that the second lifting trajectory is located on the first side in the Y direction relative to a structure erected on a floor surface, and the second protective member is arranged so that the second moving-side hanging portion and the second fixed-side hanging portion are aligned in the X direction, and the bending direction of the second connection portion is limited to a direction along the X direction when viewed in the up-down direction.

4. A lifting device as described in claim 2 or 3, wherein each of the first lifting body and the second lifting body is configured to lift and transport objects, the first lifting body is arranged so that the first lifting trajectory is located on the second side in the Y direction relative to storage equipment that stores the multiple objects to be transported, the first protective member is arranged on the second side in the Y direction relative to the storage equipment, and is arranged so as to extend along the vertical direction between the first protective member and the storage equipment in the Y direction, and further comprises a guide member having an opposing surface that faces the first protective member from the first side in the Y direction.

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