JP2016112415A - Lifting device of stool member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lifting device of a stool member, which has a simple device configuration and can be easily handled at a place where water is used.SOLUTION: A lifting device 1 of a stool member comprises a stool member 2 on which a person can be seated, and a drive unit 3 for driving the stool member 2. The drive unit 3 comprises a drive part 31 telescopically driven by a fluid, and a circulation tube 32 which is connected to the drive part 31 and circulates the fluid to the drive part. The drive part 31 has an expansion/contraction part E that can change between an expansion state where it is expanded by filling the inside with the fluid and a contraction state where it is contracted by discharging the fluid inside. The expansion/contraction part E is configured by stacking a plurality of expansion/contraction part units U1, U2 having length in a horizontal direction. The stool member 2 is elevated or lowered by the expansion and contraction of the drive part 31. The stool member 2 reciprocates between an upper position on a bathtub upper end side and a lower position on a bathtub bottom part side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lifting / lowering device for a seating member that lifts and lowers the seating member inside a bathtub.

  For bathers who need help and assistance for bathing, such as elderly people and physically disabled people who have weak physical strength, enter the tub from outside the bath, soak in the hot water in the tub, and again outside the tub The action of taking a bath, such as going out, is a big burden. For this reason, various devices have been proposed that reduce the burden of bathing operations.

  In Patent Document 1, as shown in FIG. 12, an installation part 103 installed on the floor surface 102 around the bathtub edge 101, a pair of frames 105 extending downward from the installation part 103 into the bathtub 104, A bathing lift apparatus 100 including an elevating unit 106 that moves up and down along a frame 105 is disclosed. This bathing lift apparatus 100 is provided with a driving motor 107 and a driving pulley (not shown), a driven pulley, a belt winding pulley 108, a relay pulley 109, and the like, which are connected to the driving motor 107, in the installation unit 103. A belt belt 110 is wound around the belt winding pulley 108, and the belt belt 110 extends toward the elevating unit 106. The belt-like belt 110 is changed in direction by the relay pulley 109 and is fixed to the holding plate 111 in the lifting / lowering part 106 via a stopper 112, and the lifting / lowering part 106 is supported by the belt-like belt 110 in a fishing support state. When the drive motor 107 is driven, the belt winding pulley 108 rotates, the belt-like belt 110 is drawn out, and the elevating unit 106 descends along the frame 105. When the drive motor 107 is driven to rotate in the direction opposite to that at the time of lowering, the belt-like belt 110 is wound up and the elevating part 106 is raised along the frame 105.

JP 2009-183452 A

  As described above, in Patent Document 1, the elevating unit 106 on which a person rides is supported by the belt belt 110, the drive motor 107 is driven using a power source, and the elevating unit 106 is moved up and down by the driving force of the drive motor 107. ing. However, as in Patent Document 1, a lifting device that moves up and down using a power source in a place where water is used is complicated and the size of the device becomes large, obstructing a bathing operation, and handling becomes complicated.

  In view of the above problems, the present invention has an object to provide a lifting device for a seating member that has a simple device configuration and is easy to handle in a place where water is used.

  The seat member lifting device of the present invention is a lifting device comprising a seat member on which a person can be seated and a drive device for driving the seat member, wherein the drive device is a drive unit that is extended and contracted by fluid. And a flow pipe that is connected to the drive unit and circulates the fluid to the drive unit. The drive unit is inflated by being filled with fluid, and the internal fluid is discharged. The expansion / contraction part is capable of changing to a contracted state that contracts, and the expansion / contraction part is configured by stacking a plurality of expansion / contraction part units having a length in the horizontal direction in the height direction, The seat member moves up and down by expansion and contraction of the drive unit, and the seat member reciprocates between an upper position on the bathtub upper end side and a lower position on the bathtub bottom side.

  Moreover, it is preferable that the expansion / contraction unit is annular, connects the expansion / contraction units, and has a communication path through which fluids inside the plurality of expansion / contraction units can move.

  Moreover, it is preferable that the said expansion / contraction part is comprised by laminating | stacking one tubular body helically.

  In addition, it is preferable that the expansion / contraction part has a space part on the inner side in the horizontal direction, and includes a link mechanism capable of moving up and down in the space part to perform an auxiliary operation of the drive part.

  Moreover, it is preferable that the interposed member which has rigidity is arrange | positioned between the said said expansion / contraction part units adjacent.

  According to the seat member lifting / lowering device of the present invention, the device configuration is simple and the bathing operation of the bather becomes easy.

It is a perspective view which shows one Embodiment of the raising / lowering apparatus of the seat member of this invention, and shows the state which has a seat member in an upper position. FIG. 2 is a perspective view showing a state where a seating member is in a lower position in the lifting device of FIG. 1. It is the longitudinal cross-sectional view which cut | disconnected the drive part of the raising / lowering apparatus of the state of FIG. 1 in the height direction. It is the longitudinal cross-sectional view which cut | disconnected the drive part of the raising / lowering apparatus of the state of FIG. 2 in the height direction. It is the schematic which shows the other aspect of the expansion-contraction part of the raising / lowering apparatus of this invention. It is sectional drawing which shows the interposition member interposed between the expansion-contraction part units of an expansion-contraction part. (A) is a schematic side view which shows the state which the seat member of the raising / lowering apparatus attached to the bathtub exists in a downward position, (b) is the state which the seat member moved to the upper position from the state of (a). It is a schematic side view shown. It is a perspective view which shows the raising / lowering apparatus of 2nd Embodiment of this invention. FIG. 9 is a schematic side view showing a state in which the seat member is in a lower position in the lifting device of FIG. 8. FIG. 9 is a schematic side view showing a state in which the seat member is moved to an upper position in the lifting device of FIG. 8. It is the schematic which shows the raising / lowering apparatus of 3rd Embodiment of this invention. It is side surface sectional drawing which shows the conventional lift apparatus for bathing.

  The seat member lifting and lowering device of the present invention will be described below in detail with reference to the drawings.

<First Embodiment>
As shown in FIG. 1 and FIG. 2, a sitting member lifting / lowering device (hereinafter simply referred to as lifting device) 1 according to a first embodiment of the present invention includes a sitting member 2 and a driving device 3 that drives the sitting member 2. And. As shown in FIGS. 1 and 2, the drive device 3 includes a drive unit 31 and a flow pipe 32.

  The seat member 2 is a member on which a person can sit. The seat member 2 has a seat surface on which a person sits, and is directly or indirectly connected to the drive unit 31 on the opposite side (lower side) of the seat surface. The seat member 2 can be seated by a person and can be connected to the drive unit 31. The structure of the seat member 2 is not particularly limited. In the present embodiment, as shown in FIGS. 1 and 2, The seat portion 22 is provided on the base portion 21 and a handle 23, and a seating surface is formed on the seat portion 22.

  The base portion 21 is a member that supports the constituent elements of the seat member 2, such as the seat portion 22, and in the present embodiment, the seat portion 22 and the handle 23 are supported. In the present embodiment, the base portion 21 is shown as a substantially rectangular plate-like base plate, but the shape is not particularly limited as long as the seat portion 22 and the like can be supported.

  The seating part 22 is a part where a person such as a bather sits. In the present embodiment, the seat portion 22 is attached to the base portion 21 so as to be rotatable around a vertical axis. By rotating the seating portion 22, it is possible to change the direction of the body of the bather sitting on the seat member 2. In the present embodiment, the seat portion 22 is rotatably attached to the base portion 21. However, the seat portion 22 may be configured integrally with the base portion 21 so as not to rotate with respect to the base portion 21.

  The handle 23 is a posture assisting tool for maintaining the posture of the bather sitting on the seating portion 22 and is composed of a plurality of posture assisting elements. When you get up, you can take a bath. The shape of the handle 23 is not particularly limited as long as the bather can handle it. In the present embodiment, as shown in FIGS. 1 and 2, the handle 23 includes a support 23a extending upward from the upper surface of the base 21, a first handle 23b extending substantially horizontally from the upper end of the support 23a, A second handle 23c extending substantially parallel to the first handle 23b, and a connecting member 23d for connecting one end of the first handle 23b and one end of the second handle 23c are provided. The handle 23 constituted by the first handle 23b, the second handle 23c, and the connection member 23d is formed in a substantially U shape in this embodiment, and is connected to the other end side of the first handle 23b and the second handle 23b. When the bather is seated on the seat portion 22 from the space between the other handle 23c of the second handle 23c, the user can sit.

  The first handle 23b and the second handle 23c are located on the side of the bather when the bather sits on the seat 22, and take a bath when the seat 22 changes direction, such as during bathing. They are spaced apart from each other at a predetermined interval so as to be located on both front and rear sides of the person. The connecting member 23d becomes a backrest of the bather when the bather is seated on the seating portion 22, and can prevent falling to the bathtub. When the seating portion 22 changes its direction, such as during bathing, the bather It is located on the side of and becomes a handle.

  As shown in FIGS. 1 and 2, the lifting device 1 of this embodiment includes an attachment member 4. The attachment member 4 is a member that attaches the lifting device 1 to the bathtub. The attachment member 4 is connected to the seat member 2 or the drive part 31, for example, and attaches the raising / lowering apparatus 1 to a bathtub. As long as the lifting device 1 can be mounted on the bathtub, the mounting location of the mounting member 4 is not limited. However, in the present embodiment, as shown in FIGS. 7A and 7B, from above the bathtub edge Be. It is arranged close to one side wall of the bathtub B so as to reach the bathtub bottom Bb. Since the attachment member 4 is supported by the bathtub edge Be and the bathtub bottom Bb, the entire lifting device is supported by the bathtub B, and rattling or the like is suppressed. In this embodiment, the attachment member 4 has a bowl shape having a slope in the longitudinal direction, and rises from the bathtub bottom Bb along the bathtub wall so that a flat portion can cover the upper side of the bathtub edge Be. It has a strip shape with a predetermined width. In this embodiment, as shown in FIGS. 1 and 2, the attachment member 4 has a flat portion 41 located on the upper end side of the bathtub edge Be, and the flat portion 41 toward the inside of the bathtub B from the flat portion 41. And an inclined portion 42 that extends so as to form an obtuse angle, and a rising portion 43 that extends from the inclined portion 42 along the bathtub wall. Further, the attachment member 4 extends downward from the lower surface side of the flat portion 41 and can come into contact with the outer surface of the bathtub wall. The attachment member 4 is locked to the bathtub edge Be, and the lifting device 1 is attached to the bathtub. It has the latching | locking part 44 which can be attached to B. As shown in FIG. The locking portion 44 is shown as a plate-shaped locking portion in the present embodiment, but the shape is particularly limited as long as the mounting member 4 can be locked to the bathtub edge Be. is not. Since the attachment member 4 can suppress the movement of the lifting device 1 in a direction perpendicular to one side wall of the bathtub B, the lifting device 1 can be installed in the bathtub B in a compact manner.

  In the present embodiment, as shown in FIGS. 1 and 2, the seat member 2 is connected to the attachment member 4 via an auxiliary base 24 provided adjacent to the base 21. The auxiliary base 24 of the seating member 2 is such that when the seating member 2 is raised and is in an upper position on the upper end side of the bathtub, a person moves from the bathtub edge Be side to the base 21 side (or from the base 21 side to the bathtub edge Be). It is arranged so that it can move. The auxiliary base 24 is attached to the base 21 at one end of the base 21 on the attachment member 4 side. The base 21 and the auxiliary base 24 are attached to the base 21 so as to be rotatable around the horizontal axis by known joining means such as a hinge or a bearing structure. Further, the other end side of the auxiliary base portion 24 (the side opposite to the end portion connected to the base portion 21) is provided with an engaging member (not shown) in the guide portion 45 provided along the extending direction of the mounting member 4. Connected through. The other end side of the auxiliary base portion 24 is guided by the guide portion 45 while the seat member 2 is raised and lowered, and moves up and down along the attachment member 4. The auxiliary base 24 is substantially flat with respect to the base 21 when the seating member 2 is located at the upper position, and the auxiliary base 24 is shown in FIG. 2 when the seating member 2 is located at the lower position. In addition, the base 21 is connected to the base 21 while being inclined with respect to the base 21. Thus, when the auxiliary base 24 is in the upper position, a person can move from the bathtub edge Be to the base 21 side via the auxiliary base 24 and move from the base 21 side to the bathtub edge Be side via the auxiliary base 24. be able to. At this time, slide means such as a slide guide is provided on the base 21 and the auxiliary base 24 so that the seat 22 can slide on the base 21 and the auxiliary base 24, and the seat 22 can be moved in the horizontal direction. May be. Further, when the seat member 2 is lowered, as shown in FIG. 2, the auxiliary base portion 24 rotates around the horizontal axis with respect to the base portion 21 and does not prevent the seat member 2 from being raised and lowered. Further, the auxiliary base 24 is interposed in a standing state between the seating portion 22 and the attachment member 4 (for example, the inclined portion 42 and the rising portion 43) when the seat member 2 is raised and lowered (see FIGS. 2 and 7). a)). Therefore, when the seat member 2 is raised and lowered, the auxiliary base 24 is interposed between the attachment member 4 and a part of the body of the bather (for example, a foot or a waist) that moves relative to the attachment member 4. In addition, it is possible to prevent a part of the bather's body from rubbing against the attachment member 4. In the present specification, “upper position” and “lower position” refer to the relative position of the seating member 2 with respect to the bathtub B. Specifically, the “lower position” refers to the bathtub B. The “upper position” refers to a position on the upper side of the bathtub near the upper end of the upper bathtub with respect to the lower position. The “upper position” and the “lower position” are not limited to the illustrated positions, and the upper position may be a position where the bather can go outside the bathtub B, and the lower position is the bather B. Any position may be used as long as the seat member 2 is lowered to such an extent that it can be immersed in the hot water inside.

  The engaging member that connects the auxiliary base portion 24 to the guide portion 45 is engaged with the guide portion 45 and guided so as to move in the extending direction of the guide portion 45. The engaging member can suppress the swinging of the seating member 2 in the width direction of the mounting member 4 via the auxiliary base 24 and is configured to prevent the engaging member from coming out of the guide portion 45. . The auxiliary base 24 follows the ascending / descending of the seating member 2 by turning around the connecting portion with the base 21, and is separated from the mounting member 4 by a predetermined distance from the horizontal swing of the seating member 2. Can be suppressed. Further, the engaging member is configured to follow the change even when the angle formed between the auxiliary base 24 and the mounting member 4 changes when the seat member 2 moves up and down. As the engaging member, for example, an engaging member that protrudes into the guide portion 45 and has a rolling member such as a roller that rolls in the groove of the guide portion 45 at the tip can be used. In the present embodiment, the guide portion 45 is shown as a pair of grooves that are spaced apart from each other in the width direction of the attachment member 4. However, if the auxiliary base portion 24 can move along the attachment member 4. The number of guide portions 45 and the shape thereof are not limited to those shown in the drawings.

  The driving device 3 drives the seat member 2. As shown in FIGS. 1 and 2, the drive device 3 includes a drive unit 31 and a flow pipe 32. In the present embodiment, the drive device 3 includes the link portion 5 shown in FIGS. 3 and 4 and the guide portion 45 of the attachment member 4 that guides the lifting and lowering of the seat member 2 in addition to the drive portion 31 and the flow pipe 32. However, the drive device 3 should just be provided with the drive part 31 and the distribution | circulation pipe | tube 32 at least, and may be another structure.

  The drive unit 31 is extended and contracted by the fluid from the fluid source, and raises and lowers the seating member 2 from a position on the predetermined bathtub bottom Bb side to a position on the predetermined bathtub edge Be side. The drive unit 31 has an expansion / contraction part E, and moves the seat member 2 up and down by the expansion and contraction of the expansion / contraction part E. The upper end of the drive unit 31 is connected to the seat member 2 in order to raise and lower the seat member 2. In this embodiment, as shown in FIGS. 3 and 4, the upper end side connection portion C1 is provided on the lower side of the seating member 2 (the seating member 2 is not shown in FIGS. 3 and 4). The upper end of the expansion / contraction part E is connected to the seat member 2 via the upper end side connection part C1. The upper end side connection portion C1 may be provided on the lower surface of the base portion 21 of the seat member 2, for example, or may be provided as a separate member and attached to the seat member 2. The lower end of the drive part 31 is arrange | positioned at the bathtub bottom part Bb side so that the seat member 2 and the expansion / contraction part E can be supported (refer Fig.7 (a) and (b)). In this embodiment, as shown in FIGS. 3 and 4, a lower end side connection portion C <b> 2 is provided at the lower end of the drive unit 31, and the lower end of the expansion / contraction portion E is connected to the lower end side connection portion C <b> 2. Although not particularly illustrated, the lower end of the drive unit 31 is provided at the lower end side of the mounting member 4 (for example, the lower end side connection portion) in order to hold the position of the lower end of the drive unit 31 on the spot when the drive unit 31 is driven up and down. C2) may be connected and fixed.

  In the present embodiment, the drive device 3 includes a link mechanism 5 in addition to the expansion / contraction part E, as shown in FIGS. 3 and 4. The link mechanism 5 performs an auxiliary operation of the drive unit 31 that is driven to expand and contract according to the expansion and contraction of the expansion / contraction part E. That is, for example, the link mechanism 5 can maintain the posture of the drive unit 31 at the time of ascent in a predetermined range, and can support the load applied to the seating member 2 to some extent. 3 and 4, the link mechanism 5 expands as the expansion / contraction part E expands and contracts as the expansion / contraction part E contracts.

  The structure of the link mechanism 5 is not particularly limited, but can be constituted by a multi-node link. 3 and 4 show only one link mechanism 5, a pair of link mechanisms 5 that perform the same operation may be provided. In the present embodiment, in each of the pair of link mechanisms 5, as shown in FIGS. 3 and 4, a plurality of link members are crossed in an X shape and are linked in the vertical direction. However, the structure of the link mechanism 5 is not limited to the structure shown in the drawing, as long as the link mechanism 5 can be expanded and contracted.

  The upper end of the link mechanism 5 is connected to the upper end side of the drive unit 31 or the lower side of the seating member 2, and the lower end of the link mechanism 5 is connected to the lower end side of the drive unit 31. Specifically, for example, the upper end of the link mechanism 5 is connected to the upper end side connection portion C1, and the lower end of the link mechanism 5 is connected to the lower end side connection portion C2. In this embodiment, as shown in FIG. 3 and FIG. 4, for example, a groove-shaped link guide G <b> 1 extending in the horizontal direction is provided in the upper end side connection portion C <b> 1. One end of 51b is connected to the link guide G1. In the present embodiment, one link member 51a located at the upper end is fixed by a fixed fulcrum S1, and the other link member 51b is configured to be movable in the link guide G1 by a movable fulcrum S2. Similarly, a groove-shaped link guide G2 extending in the horizontal direction, for example, is provided at the lower end side connecting portion C2, and one ends of link members 52a and 52b positioned at the lower end of the link mechanism 5 are connected to the link guide G2. In the present embodiment, one link member 52a located at the lower end is fixed by a fixed fulcrum S3, and the other link member 52b is configured to be movable in the link guide G2 by a movable fulcrum S4. In addition, as long as the link mechanism 5 is provided so that it can expand and contract with expansion and contraction of the expansion / contraction part E, the connection method and operation at the upper end and lower end of the link mechanism 5 are not particularly limited, and all of the fulcrums S1 to S4. May be a movable fulcrum. 3 and 4, a roller R that moves while rotating in the link guide G2 may be provided at the lower end of the link member 52b at the lower end of the link mechanism 5.

  As shown in FIG. 1 and FIG. 2, the flow pipe 32 is connected to the drive unit 31 and causes the fluid to flow through the drive unit 31. The flow pipe 32 functions as a supply path for feeding the fluid from the fluid source to the drive unit 31. The structure and material of the flow pipe 32 are not particularly limited as long as the flow pipe 32 has a thickness and a length that can withstand a necessary fluid pressure. In the present embodiment, a flexible tube is used as the flow tube 32. When a flexible tube is used, the flow tube 32 is arranged according to the layout of the lift device 1 such as the arrangement position of the drive unit 31 in the lift device 1. 32 can be bent freely. For example, the flow pipe 32 may be disposed along the seat member 2 or the attachment member 4.

  The flow pipe 32 connects between the fluid source (for example, the fluid pump 33 in FIGS. 1 and 2) and the expansion / contraction part E in order to supply fluid from the fluid source to the drive unit 31. In this embodiment, as shown in FIGS. 1 and 2, one end of the flow pipe 32 is connected to the lower end side of the expansion / contraction part E, and the other end is connected to the fluid pump 33. However, as long as fluid can be supplied to the inside of the expansion / contraction part E, the connection part of the distribution pipe 32 and the expansion / contraction part E is not particularly limited. For example, the connection pipe 32 is connected to the upper end side of the expansion / contraction part E. May be. In addition, the connection method of the flow pipe 32 and the drive part 31 will not be specifically limited if it connects so that the fluid which distribute | circulates an inside may not leak. The flow pipe 32 may be detachably connected to the drive unit 31 and the fluid source.

  The fluid source feeds fluid into the drive unit 31 via the flow pipe 32 in order to drive the drive unit 31. The fluid supplied from the fluid source is not particularly limited as long as it can flow into the expansion / contraction part E when the seat member 2 is raised and can be discharged from the expansion / contraction part E when the seat member 2 is lowered. For example, water can be used. Any fluid source may be used as long as the fluid can be fed into the flow pipe 32 with a predetermined fluid pressure. However, as in the present embodiment, the fluid source includes a fluid pump 33 such as a known pump. can do. However, the fluid source is not limited to the fluid pump 33 as long as the fluid can be fed into the flow pipe 32. For example, as shown in a second embodiment described later, a faucet WF for domestic water supply (FIG. 8). For example, the water pressure of tap water may be used by connecting to the circulation pipe 32.

  In this embodiment, the fluid pump 33 has a water intake 33a and / or a drain 33b as shown in FIG. The water intake port 33a is configured to suck water, and the water discharge port 33b is configured to discharge water sucked from the water intake port 33a toward the drive unit 31. In the present embodiment, a water intake pipe 34 such as a tube is connected to the water intake port 33a, and water can be sucked from the water intake pipe 34. In addition, the fluid sent into the expansion / contraction part E by the fluid source such as the fluid pump 33 is configured to be discharged from a discharge part 35a provided in the switching valve 35 as shown in FIGS. 1 and 2, for example. The flow pipe 32 may be used not only as a supply path to the expansion / contraction part E but also as a discharge path. In the present embodiment, the switching valve 35 allows the fluid pump 33 and the expansion / contraction part E to communicate with each other through the flow pipe 32 when the fluid is sent to the drive unit 31, and discharges the fluid from the expansion / contraction part E. In other words, the fluid is discharged from the discharge portion 35 a by switching the switching valve 35. In this embodiment, the discharge part 35 a is formed in the switching valve 35 provided in the middle of the flow pipe 32, but the discharge part 35 a may be provided in the drive part 31 or built in the fluid pump 33. You may let them. Further, as shown in a second embodiment to be described later, a discharge port for discharging the fluid in the expansion / contraction part E such as a discharge pipe 36 (see FIG. 8) may be provided separately from the flow pipe 32. When the discharge pipe 36 is provided, for example, as shown in FIG. 8, the discharge pipe 36 is provided with a switching member for switching between the closed state and the open state of the discharge pipe 36, such as a switching valve 37, and the expansion / contraction part E What is necessary is to make it possible to discharge the internal fluid. In addition, the position of switching members, such as the switching valve 37, is not limited to the position shown in figure, You may be provided in another position.

  Next, the expansion / contraction part E will be described. The expansion / contraction part E is connected to the flow pipe 32 and expands when the fluid is filled therein (see FIGS. 1 and 3) and contracted when the fluid is exhausted (see FIG. 1 and FIG. 3). Changes from FIG. 2 and FIG. 4) are possible. As shown in FIGS. 1 to 4, the expansion / contraction part E has an expansion / contraction part unit having a length in the horizontal direction (part of the expansion / contraction part unit is indicated by reference numerals U <b> 1 and U <b> 2) in the height direction. It is composed of multiple stacks.

  The expanded state of the expansion / contraction part E is a state in which the fluid is supplied from the flow pipe 32 and is expanded by the fluid at a predetermined pressure, and is an expanded state in which a person can be supported. The contracted state refers to a state in which the internal fluid is discharged from the expanded state and contracts with respect to the expanded state. When the fluid is filled in or discharged from the expansion / contraction part E, each expansion / contraction part unit U1, U2 expands or contracts, and the entire expansion / contraction part E is expanded or contracted in the height direction. The seat member 2 is moved up and down. The expansion / contraction part E is not particularly limited as long as it can reversibly deform between an expanded state and a contracted state and can raise and lower the seat member. It is preferable to use a material such as a flexible material such as rubber.

  The expansion / contraction unit U1, U2 is one unit extending in the horizontal direction of the expansion / contraction unit E, and the expansion / contraction unit U1, U2 extending in the horizontal direction is stacked in a plurality of stages in the height direction. E is configured. When each expansion / contraction unit U1, U2 expands, the entire expansion / contraction unit E expands in the height direction, each expansion / contraction unit U1, U2 contracts, and the entire expansion / contraction unit E increases in the height direction. Shrink.

  Each expansion / contraction unit U1, U2 extends in a direction having a horizontal component, and forms a flow path through which the fluid flows in the horizontal direction. The expansion / contraction unit U1 and U2 stacked in the height direction each form a horizontal unit, but may be integrated with each other or separate. In the present embodiment, the expansion / contraction unit U1, U2 is provided in a ring shape in the embodiment shown in FIGS. 1 to 4 or the embodiment shown in FIG. Here, “annular” means that the expansion / contraction unit U1, U2 is provided so as to make a round around the vertical axis, but the starting point and the end point of one round need not be connected. For example, each of the expansion / contraction unit U1 and U2 may spiral around as shown in FIG. 1, and the starting point and end point of one round may not be connected, or the ring as shown in FIG. The starting point and the ending point may be connected in a circle. Further, the term “annular” is not limited to an annular shape, and includes a polygonal shape when viewed from above. When the expansion / contraction part units U1 and U2 are formed in an annular shape, the entire expansion / contraction part E is substantially cylindrical (substantially cylindrical in this embodiment), and the substantially cylindrical expansion / contraction part E expands and contracts in the height direction. To do. In the present embodiment, as shown in FIGS. 1 to 4, the expansion / contraction part E is configured by stacking one tubular body in a spiral shape, and the expansion / contraction part E has a substantially cylindrical shape. However, the expansion / contraction part E may have another shape as long as the extending direction of the expansion / contraction part units U1 and U2 has a horizontal component, as in the modification shown in FIG. A plurality of ring-shaped expansion / contraction unit U1 and U2 having substantially the same diameter may be stacked concentrically in the height direction. In forming the expansion / contraction part E, one tubular body is spirally stacked as described above, or a plurality of ring-shaped expansion / contraction part units U1, U2 are stacked in the height direction. In addition, for example, a combination of two bellows-like substantially cylindrical members having different diameters (with a small-diameter bellows-like substantially cylindrical member disposed inside the large-diameter bellows-like substantially cylindrical member) You may form the expansion-contraction part of the shape shown in 3. FIG.

  Further, the expansion / contraction unit U1, U2 may have a shape other than an annular shape. For example, a plurality of expansion / contraction units that extend linearly in the horizontal direction are stacked in the height direction to form a wall, and the expansion of the wall A pair of contracting portions may be provided to face each other to form an expanding / contracting portion.

  The cross-sectional shape of the expansion / contraction unit U1, U2 is not particularly limited, but in the present embodiment, in the expanded state, as shown in FIG. 3, the cross-sections in the height direction of the expansion / contraction unit U1, U2 are substantially It is configured to be circular or elliptical. In the expanded state, the expansion / contraction unit U1, U2 having a substantially circular or elliptical cross section is stacked in the height direction. When the fluid inside the expansion / contraction unit U1, U2 is discharged, as shown in FIG. 4, each expansion / contraction unit U1, U2 is crushed in the height direction and deformed into a flat shape. Then, the expansion / contraction part E contracts.

  The expansion / contraction part E connects the expansion / contraction part units U1 and U2 so that the fluid flows between the expansion / contraction part units U1 and U2, and the fluid inside the plurality of expansion / contraction part units U1 and U2 flows. The communication path P (refer FIG. 3) which can move mutually is provided. In this embodiment, the communication path P is formed so that the expansion / contraction unit U1, U2 communicates in the vertical direction. However, the communication path P may be a path in which the fluid inside the expansion / contraction unit U1, U2 can move relative to each other. For example, when the expansion / contraction part E is formed of a single tubular body, the communication path P is expanded. A space inside the contraction unit U1 and U2 may be used as a communication path. In FIG. 3, a plurality of communication paths P are formed at the same position in the circumferential direction of the expansion / contraction unit U1, U2, but the position where the communication path P is provided is the expansion / contraction unit U1, As long as the fluid can move between U2, the expansion and contraction unit U1 and U2 may be provided at different positions in the circumferential direction.

  As described above, the expansion / contraction part E can be changed between the expanded state and the contracted state by the fluid from the flow pipe 32, and as shown in FIGS. 7A and 7B, the drive unit The seat member 2 moves up and down due to the expansion and contraction of 31, and the seat member 2 moves between the upper position on the upper end side of the bathtub (see FIG. 7B) and the lower position on the bottom side of the bathtub (see FIG. 7A). Move back and forth. Specifically, as shown in FIG. 4 and FIG. 7A, each of the expansion / contraction unit U1 and U2 of the expansion / contraction unit E before the fluid is supplied as the seat member 2 is in the lower position. The expansion / contraction unit U1, U2 is in a contracted state. When the seat member 2 is raised from the lower position to the upper position, the fluid is supplied from the fluid source to the expansion / contraction part E through the flow pipe 32 in the state of FIG. When the fluid is supplied to the expansion / contraction part E, the inside of each expansion / contraction part unit U1, U2 expands by the pressure of the fluid, and each expansion / contraction part unit U1, U2 expands in the height direction, and the seat member 2 To raise. The seat member 2 can reciprocate by repeating the expansion and contraction of the expansion / contraction unit U1, U2. When the expansion / contraction part E is inflated, an exhaust port (valve or the like) for discharging air inside the expansion / contraction part E may be provided. Conversely, when the seat member 2 is lowered, if the fluid is discharged from the expansion / contraction portion E, the expansion / contraction portion units U1 and U2 contract in the height direction, and the seat member 2 descends.

  Thus, since the drive part 31 is driven by filling the expansion / contraction part E with fluid and discharging the fluid from the expansion / contraction part E, the seat member 2 can be lifted and lowered if a predetermined fluid pressure can be supplied. It becomes possible. Therefore, in order to move the seat member 2 up and down, a driving motor that needs to generate a relatively large driving force that can move the lifting unit up and down with a person as in Patent Document 1, and a power source that operates the driving motor Is not necessary. The lifting device 1 of the present invention is basically different from that using electric power of a power source as a direct driving force for lifting and lowering the seat member 2, and a direct driving force for lifting and lowering the seat member 2 by a fluid pressure. It is said. Therefore, unlike conventional lifting devices that depend on the output of the power supply, waterproofing measures to prevent electric shock etc. are reduced, the device configuration is simple and downsized, and handling in places where water is used is possible. It becomes easy. Further, since the expansion / contraction unit U1, U2 has a length in the horizontal direction and is stacked in plural, it can effectively support the load when a person sits on the seat member 2 in the expanded state. . In the contracted state, since a plurality of expansion / contraction unit units are provided in the height direction, the outer periphery of the expansion / contraction unit U1, U2 in the expansion state and the contraction state as shown in FIGS. The overhang to the side is small and it can be folded compactly.

  In the present embodiment, as shown in FIG. 3, the expansion / contraction part E has a space part Sp on the inner side in the horizontal direction, and a link mechanism 5 that can be moved up and down is provided in the space part Sp. In the case of the substantially cylindrical expansion / contraction part E as shown in FIG. 3, the space part Sp is a space radially inward of the expansion / contraction part E, but is not limited to this embodiment, and the expansion / contraction part For example, when the E is formed by two opposing wall-shaped expansion / contraction portions, the space portion Sp may be an inner space sandwiched between the expansion / contraction portions in the horizontal direction. In this way, when the link mechanism 5 is provided in the space Sp, and the link mechanism 5 is configured to expand and contract in the space Sp, between the link mechanism 5 and a part of the body such as a bather's foot. Since the expansion / contraction part E is interposed, it is possible to prevent a part of the bather's body from hitting or being pinched by the link mechanism 5 when the link mechanism 5 is expanded or contracted.

  As a modification, as shown in FIG. 6, a rigid interposition member 6 may be disposed between the adjacent expansion / contraction unit U1 and U2. The interposition member 6 is interposed between the expansion / contraction unit U1 and U2, and regulates the position between the expansion / contraction unit U1 and U2 when the seat member 2 is lifted and lowered by expansion and contraction of the expansion / contraction unit U1 and U2. . As the interposition member 6, for example, as shown in FIG. 6, the boundary portion I of the expansion / contraction portion units U1 and U2 is restricted from deformation or expansion to the outside of the expansion / contraction portion E in the boundary portion I to expand / contract The relative position between the unit units U1 and U2 is regulated. In FIG. 6, the shape of the interposition member 6 is an annular disc 61 formed so that the inner peripheral surface thereof follows the outer periphery of the boundary portion I, and the standing member that stands upright from the outer peripheral edge of the disc 61 in a substantially vertical direction. Although the thing with the part 62 is shown, if the interposition member 6 can interpose between the expansion-contraction part units U1 and U2 and can regulate the position between the expansion-contraction part units U1 and U2. The shape is not limited to that shown in FIG. For example, the interposition member 6 may be a ring-shaped member provided on the outer periphery or inner periphery of the boundary portion I that is concave from the outer peripheral surface or inner peripheral surface of the expansion / contraction portion E. In the case of a spiral shape, a spiral interposition member such as a coil spring provided on the outer periphery or inner periphery of the spiral boundary I may be used. In addition, the rigidity of the interposition member 6 should just be a rigidity which can suppress the deformation | transformation in the boundary part I when the fluid is filled in the expansion / contraction part E.

  Next, an embodiment of the lifting device 1 will be described with reference to FIGS. The following examples are merely examples, and the present invention is not limited to the following examples.

  First, as shown in FIG. 7A, the flat portion 41 and the locking portion 44 of the mounting member 4 are locked to the bathtub edge Be of the bathtub B, and the lifting device 1 is mounted to the bathtub B. When an operation unit (not shown) provided with an operation switch or the like is operated, the water in the bathtub B is sucked from the water intake pipe 34 by the fluid pump 33 and the water in the bathtub B is supplied from the flow pipe 32 to the expansion / contraction part E. Send in. The water fed into the expansion / contraction part E flows in the horizontal direction in the respective expansion / contraction part units U1 and U2, and passes through the communication path P shown in FIG. 3 from one expansion / contraction part unit U1 to the other expansion / contraction part. It flows to the unit U2. The pressure of the supplied water causes the expansion / contraction part units U1 and U2 of the expansion / contraction part E to expand, and the entire expansion / contraction part E expands in the vertical direction, as shown in FIG. 2 rises toward the upper position. At this time, the link mechanism 5 extends from the state shown in FIG. 4 to the state shown in FIG. 3, so that the posture of the expansion / contraction part E can be supplementarily stabilized. Moreover, since the outer periphery of the link mechanism 5 is covered with the expansion / contraction part E, the link mechanism 5 is not exposed to the outside, and a bather may contact the link mechanism 5 or be pinched by the link mechanism 5. It is suppressed.

  Next, the bather is seated on the sitting member 2 in the upper position shown in FIG. At this time, as shown in FIG. 7B, the auxiliary base 24 is disposed at a position substantially horizontal to the base 21 of the seat member 2 when the seat member 2 is in the upper position. The movement to the base 21 side becomes easy. The auxiliary base 24 is guided by the guide portion 45 of the mounting member 4 and rotated about the horizontal axis with respect to the base 21 as shown in FIG. 7A when the seat member 2 is raised and lowered. Then, it is inclined along the shape of the surface of the mounting member 4 and does not hinder the seat member 2 from moving up and down. Further, the fluid pump 33 is installed at the upper end of the bathtub edge Be which does not disturb the bather, and there is no obstacle at the bather's foot. For this reason, it becomes easy to wash the body in a seated state, to change the posture when taking a bath, to stand up from the seating member 2 by itself. When the bather's seating is completed, the seating portion 22 is rotated to change the bather's posture (direction with respect to the bathtub B) (see FIGS. 1 and 2). Thereafter, the water introduced into the expansion / contraction part E can be discharged from the discharge part 35a or the like by an operation of an operation part (not shown) or an operation of the switching valve 35. When the water in the expansion / contraction part E can be discharged, the water in the expansion / contraction part E is discharged due to the pressure of the bather's body weight, and each expansion / contraction part unit U1, U2 contracts, and the expansion / contraction part E as a whole contracts vertically. Thereby, the seat member 2 moves to the lower position, and the bather can be immersed in the hot water in the bathtub B.

  When the bather's bathing is completed, by operating the operation unit again, water is sent into the expansion / contraction part E by the fluid pump 33, the expansion / contraction part E expands, and the seat member 2 rises. Thereafter, the bather can leave the bathtub B via the auxiliary base 24.

  When removing the lifting / lowering device 1 after bathing is completed, the lifting / lowering device 1 can be removed by pulling up the seating member 2 or the attachment member 4. Since the lifting device 1 does not require an electric motor or a power source for driving the electric motor, and there are few heavy members, the lifting device 1 can be easily lifted, and the lifting device 1 can be removed and moved. Can be easily performed. Moreover, when removing the lifting / lowering device 1, the fluid pump 33 is connected to the bathtub edge Be by releasing the connection between the fluid pump 33 and the flow pipe 32 or by releasing the connection between the expansion / contraction part E and the flow pipe 32. The elevating device 1 can be removed as it is placed. In this case, the lifting device 1 becomes lighter and more compact, and the lifting device 1 can be easily removed from the bathtub B.

Second Embodiment
Next, a lifting device according to a second embodiment of the present invention will be described. The lifting device of the second embodiment is an embodiment shown in FIG. 1 to FIG. 7 (hereinafter referred to as “the expansion / contraction direction of the expansion / contraction part” is inclined with respect to the vertical direction of the bottom of the bathtub). This is different from the first embodiment). In addition, below, description is abbreviate | omitted about the point which is common in 1st Embodiment, and it demonstrates centering around difference. Each component described in the second embodiment can be used in combination with the component described in the first embodiment. Hereinafter, the lifting device of the second embodiment will be described with reference to FIGS.

  As shown in FIGS. 8 to 10, the lifting / lowering device 10 of the present embodiment is inflated when the expansion / contraction part E is in an inflated state by supplying water from the faucet WF, which is a fluid source, into the expansion / contraction part E. When the member 2 is raised and water is discharged from the discharge pipe 36 (not shown in FIGS. 9 and 10), the expansion / contraction part E is in a contracted state, and the seat member 2 is lowered. In the present embodiment, the expansion / contraction part E is formed as a hollow substantially cylindrical body having a filling part F inside as shown in FIGS. 9 and 10. More specifically, as shown in FIGS. 8 to 10, the expansion / contraction portion E is a bellows in which peaks and valleys are alternately formed along the expansion / contraction direction of the expansion / contraction portion E. It is formed in a shape. In the present embodiment, for example, from the bottom of one trough including one peak to the bottom of a trough adjacent in the height direction as in the expansion / contraction units U1 and U2 shown in FIG. Constitutes one expansion / contraction part unit, and a plurality of crest parts and valley parts constitute a plurality of expansion / contraction part units stacked in the height direction. In the present embodiment, the filling portion F of the expansion / contraction portion E is filled with fluid in the entire interior of the expansion / contraction portion E including the center portion of the expansion / contraction portion E along the expansion / contraction axis X of the expansion / contraction portion E. It is configured to be.

  Further, in the lifting device 10 of the present embodiment, when the seat member 2 rises from the lower position shown in FIG. 9 toward the upper position shown in FIG. 10, the seat member 2 rises and the attachment member 4 is attached. It is comprised so that it may move to a horizontal direction so that it may approach the bathtub edge Be. That is, in this embodiment, the expansion / contraction part E expands / contracts so that the expansion / contraction axis X is inclined from the vertical direction (vertical direction) V perpendicular to the bathtub bottom Bb, as shown in FIG. Is configured to do. Specifically, when the lower end side connection part C2 of the lifting / lowering device 10 is disposed on the bathtub bottom Bb, the lifting / lowering device 10 is separated from the bathtub bottom Bb so as to be inclined with respect to the vertical direction V with respect to the bathtub bottom Bb. A support member 46 extending toward the bathtub edge Be, and a guide member 47 that slides along the support member 46 in accordance with the expansion and contraction of the expansion / contraction part E, and guides the vertical behavior of the expansion / contraction part E. It has. In this embodiment, as shown in FIG. 8, the lifting device 10 has a pair of arms Ar extending from the seat member 2 toward each of the pair of support members 46, for example, extending from the base 21 of the seat member 2. The support member 46 is connected to the support member 46 via a guide member 47 provided on the arm Ar. The support member 46 has one end connected to the flat part 41 located on the upper end side of the bathtub edge Be, the other end connected to the lower end side connection part C2, and the bathtub bottom from the upper position on the bathtub upper end side. It extends over the lower position on the side. The arm Ar extends vertically upward from the end of the horizontal portion of the arm Ar opposite to the support member 46 side, and a pair of handles 23b, 23c extend horizontally from the upper end of the extended arm Ar. Yes. Also, a backrest 23e is formed between the portions of the pair of arms Ar that extend in the vertical direction. In the present embodiment, the guide member 47 is provided at the end of the arm Ar opposite to the backrest side.

  In the present embodiment, as described above, the seat member 2 moves upward and is configured to move in the horizontal direction so as to approach the bathtub edge Be to which the attachment member 4 is attached. Therefore, in this embodiment, in addition to the effect demonstrated in 1st Embodiment, when a bather gets on and off the seat member 2, it becomes easy to get on and off because the seat member 2 approaches bathtub edge Be. Moreover, when the seat member 2 descends, the seat member 2 moves in the horizontal direction toward the center portion of the bathtub B (the center portion in the left-right direction in FIGS. 9 and 10) on the bathtub bottom Bb side. Therefore, the bather can take a bath at the center side away from the wall portion of the bathtub B during bathing. Moreover, the wall part of the bathtub B is shown in FIG. 9 and FIG. 10 by extending toward the bathtub edge Be from the bathtub bottom part Bb so that the support member 46 may incline with respect to the perpendicular direction V with respect to the bathtub bottom part Bb. Even if it is the bathtub B with a level | step difference, the raising / lowering apparatus 10 can be installed easily.

  Further, as shown in FIG. 8, the lifting device 10 of the present embodiment connects between the support member 46 and at least a part of the outer periphery of the expansion / contraction part E (for example, a valley of the expansion / contraction part E). The auxiliary guide member 48 is slidably attached to the support member 46 when the expansion / contraction portion E expands and contracts. The auxiliary guide member 48 is formed in a shape that does not inhibit the contraction of the expansion / contraction part E when the expansion / contraction part E contracts. By providing the auxiliary guide member 48, the expansion / contraction part E is guided when the expansion / contraction part E is inflated and contracted, and the stable raising and lowering of the seat member 2 is assisted. 9 and 10, the auxiliary guide member 48 is not shown.

  In the present embodiment, the auxiliary base 24 is connected to the pair of fixing portions 24a fixed to the ends of the pair of arms Ar on the support member 46 side, and the pair of fixing portions 24a. And an auxiliary base body 24b provided on the bathtub edge Be. In this embodiment, the auxiliary base body 24b has a shape corresponding to the outer peripheral shape of the seat member 2 when the seat member 2 is in the upper position, and the horizontal direction between the auxiliary base body 24b and the seat member 2 is the horizontal direction. The gap is made smaller. In the present embodiment, the auxiliary base 24 includes a pair of fixing portions 24a and an auxiliary base main body 24b connected to each other by a thin hinge portion 24c so as to be swingable. Accordingly, as shown in FIGS. 9 and 10, when the seating member 2 is lowered from the upper position, the auxiliary base body 24b swings around the hinge portion 24c, so that the support member 46 and the bather can Arranged between them to prevent rubbing between a part of the bather's body and the support member 46. Further, as in the present embodiment, the auxiliary base portion 24 is formed of a thin plate such as a resin, and the hinge portion 24c is thin to enable the auxiliary base portion main body 24b to be swingable. Weight reduction is possible. Note that the auxiliary base 24 of the present embodiment is fixed only by the fixing portion 24a, and the auxiliary base main body 24b is not fixed to the support member 46 and the like, and is thus in a free state. It can be a simple configuration.

<Third Embodiment>
Next, the lifting device of the third embodiment will be described. In the lifting device of the third embodiment, the expansion / contraction part is configured to be double in the radial direction, and the inner space of the inner expansion / contraction part, the inner periphery of the outer expansion / contraction part, and the outer periphery of the inner expansion / contraction part This is different from the first and second embodiments in that fluid can be supplied to both spaces. Hereinafter, the lifting device of the third embodiment will be described with reference to FIG.

  As shown in FIG. 11, the lifting device 11 of this embodiment includes an inner expansion / contraction part E1 and an outer expansion / contraction part E2 each configured to be capable of changing between an expanded state and a contracted state. As shown in FIG. 11, the inner expansion / contraction part E1 is provided on the inner side in the radial direction of the outer expansion / contraction part E2, and has a smaller diameter than the outer expansion / contraction part E2. The inner expansion / contraction part E1 and the outer expansion / contraction part E2 are arranged substantially coaxially. The inner expansion / contraction part E1 includes a first filling part F1 capable of supplying a fluid therein. Between the inner periphery of the outer expansion / contraction part E2 and the outer periphery of the inner expansion / contraction part E1, a second filling part F2 capable of supplying a fluid is provided. The first filling part F1 and the second filling part F2 can be connected directly or indirectly to the flow pipe 32 or other flow paths so that fluid can be supplied to each. As described above, in this embodiment, the expansion / contraction part E has a double structure of the inner expansion / contraction part E1 and the outer expansion / contraction part E2, in addition to the effect described in the first embodiment, either Even when one of the expansion / contraction portions is torn or a hole is formed, the other expansion / contraction portion may cause the seat member 2 to rapidly drop while the bather is seated on the seat member 2. No (or continue to support as it is). In the present embodiment, the first filling unit F1 functions as a main drive unit, and the second filling unit F2 protects the first filling unit F1 from friction with the outside, and serves as an auxiliary drive unit that assists the lifting operation of the seating member. Function. The inner expansion / contraction part E1 and the outer expansion / contraction part E2 are formed separately if the first filling part F1 and the second filling part F2 are formed and fluid can be supplied to the respective filling parts. Alternatively, they may be formed integrally. Moreover, the lifting / lowering apparatus 11 of 3rd Embodiment should just have the part from which an expansion-contraction part becomes a double structure at least, for example, triple (for example, the 1st-3rd expansion-contraction part from which a diameter differs) or more It doesn't matter.

DESCRIPTION OF SYMBOLS 1, 10, 11 Lifting device 2 Seat member 21 Base 22 Seating part 23 Handle 23a Post 23b 1st handle 23c 2nd handle 23d Connection member 23e Backrest 24 Auxiliary base 24a Fixing part 24b Auxiliary base main body 24c Hinge Part 3 Drive unit 31 Drive part 32 Flow pipe 33 Fluid pump 33a Intake port 33b Drain port 34 Intake pipe 35 Switching valve 35a Discharge part 36 Discharge pipe 37 Switch valve 4 Mounting member 41 Flat part 42 Inclination part 43 Rising part 44 Locking part 45 Guide part 46 Support member 47 Guide member 48 Auxiliary guide member 5 Link mechanism 51a, 51b, 52a, 52b Link member 6 Interposition member 61 Disk 62 Standing part Ar Arm B Bath Be Bath tub edge Bb Bath tub bottom C1 Upper end connection part C2 Lower end side connection part E Expansion / contraction part E1 Inner expansion / contraction part E2 Outer expansion / contraction part F Filling part F1 First filling part F2 Second filling part G1, G2 Link guide I Boundary part P Communication path R Roller S1, S3 Fixed fulcrum S2, S4 Movable fulcrum Sp Space part U1, U2 Expansion / contraction part unit WF faucet V Vertical direction perpendicular to bathtub bottom X Expansion / contraction axis of expansion / contraction part

Claims (5)

A lifting device comprising a seating member on which a person can be seated and a drive device for driving the seating member,
The driving device includes:
A drive unit that is extended and contracted by a fluid;
A flow pipe connected to the drive unit and circulating the fluid to the drive unit;
The drive unit has an expansion / contraction part capable of changing between an expansion state that expands when a fluid is filled therein and a contraction state that contracts when the internal fluid is discharged;
The expansion / contraction part is configured by stacking a plurality of expansion / contraction part units having a length in the horizontal direction in the height direction,
The seat member moves up and down by expansion and contraction of the drive unit, and the seat member reciprocates between an upper position on the bathtub upper end side and a lower position on the bathtub bottom side,
Elevating device for seat member. The expansion / contraction unit is annular,
The elevating device according to claim 1, further comprising a communication path that connects the expansion / contraction units and allows fluids inside the plurality of expansion / contraction units to move relative to each other. The lifting device according to claim 1, wherein the expansion / contraction portion is configured by stacking one tubular body in a spiral shape. The ascending / descending operation according to any one of claims 1 to 3, wherein the expansion / contraction part has a space part on the inner side in the horizontal direction, and includes a link mechanism that can be moved up and down in the space part to perform an auxiliary operation of the drive part. apparatus. The raising / lowering apparatus in any one of Claims 1-4 with which the interposed member which has rigidity was distribute | arranged between the said expansion / contraction part units which adjoin.

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