JP2008201519A - Chair type stairway elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair type stairway elevator usable comfortably by reducing the occurrence of vibrations at a rail joint section and lessening a scary feeling of an aged or a handicapped user in the chair type stairway elevator adopting a rail storage device. <P>SOLUTION: The midpoint close to the end and located in the lower floor side of rails 2 arranged along the wall surface of the stairs is divided, and the upper floor side from the divided section of the rails 2 is considered as a fixed rail 2a to the stairs and the lower floor end side is considered as a movable rail 2a. The movable rail 2b is made rotatable between a position extended relative to the fixed rail 2a and the upper part storing position of the fixed rail 2a. A deceleration indicating member 34 is fixed on the exterior surface of the end on the divided side of the fixed rail 2a and the movable rail 2b, and a detection member 35 decelerating the travelling speed of the chair 4 by detecting the deceleration indicating member 34 is provided in the chair 4 moving along the rails 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a chair-type stair lift equipped with a rail storage device that can be raised and lowered while sitting on a chair and can be shortened by folding the end of the lower floor of the rail that guides the lift of the chair. The present invention relates to a chair-type stair lift that reduces the occurrence of shock when a chair passes through a joint portion of a rail in a device, so as to relieve a user's fear and improve riding comfort.

  As a welfare device for people who have difficulty climbing up and down stairs, a chair-type stair lift that allows you to go up and down just by sitting on a chair is installed in parallel with rails that incline along the walls of the stairs in the same way as the stairs. The chair is movably attached to this rail with grooved wheels, the switch is operated while sitting on the chair, the chair moves up and down along the rail by activating the lifting mechanism of the chair, and it sits on the chair The stairs can be raised and lowered in the state.

  The chair type stair climbing device as described above is installed on the lower floor side of the stairs so that the lower end of the rail can be approached to the lower floor so that the chair can be smoothly boarded and exited without hindrance. The lower end of the guide rail protrudes from the wall surface of the stairs.

  Most chair-type stair lifts are installed in ordinary households, and the lower floor of the stairs is often a corridor through which people pass, and the lower end of the rail protrudes from the wall of the stairs to the floor as described above. If there is a danger of people tripping on the rail, the lower end of the rail projects, occupies the floor space on the lower floor of the stairs, and can be opened and closed freely when there are doors etc. There is a possibility that a failure such as inability to occur or a case where a chair type stair lifting device cannot be installed may occur.

Conventionally, in order to eliminate the inconvenience as described above, the lower end of the rail is divided at a position of a predetermined length, and from the divided portion of the rail, the upper floor side is a fixed rail with respect to the staircase, and the lower floor end portion side is a movable rail. The movable rail is pivotally attached to the end of the fixed rail so that the movable rail can be changed to either an extended state of the fixed rail or a state where the fixed rail is lifted up. A rail storage device for a chair type stair lifting device has been proposed in which the protrusion of the rail to the lower floor of the stairs is eliminated by raising (see, for example, Patent Documents 1 and 2).
JP-T-2002-527324 Japanese Patent Laid-Open No. 2001-226057

  By the way, when the rail is divided into a fixed rail and a movable rail, a joint is formed in the rail, and the movable part repeats coupling and separation, so that gaps and steps are likely to occur compared to other joint parts of the rail. There is a problem that the vibration generated when the wheel of the chair passes through the joint is increased, which gives the user a feeling of fear.

  Also, for lifting the chair along the rail, a rack or rack chain is fixed to the rail along the length direction, the pinion of the lifting mechanism provided on the chair is engaged with this, and the chair is moved by rotating the pinion by the lifting mechanism. In the case of using a rack chain as an alternative to a rack, in Patent Document 2, the rack chain is not divided and the movable rail is stored while hanging the rack chain. It cannot be used for a rail having a structure that is housed in an internal groove or the like.

  As described above, the structure in which the rack chain is hung is poor in design and has problems in terms of hygiene and safety due to oil contamination.

  Furthermore, since the movable rail is not fixed to the floor or wall surface, it becomes a cantilever structure, a load is applied to the movable rail toward the opposite side of the staircase wall surface, and a twisting force is applied to the joint portion to chair the joint portion. The vibration that occurs when the is passing increases.

  Therefore, the object of the present invention is to reduce the occurrence of vibration at the rail joint in a chair type stair lift adopting a rail storage device, relieve the fear of elderly users and disabled people, and use comfortably It is to provide a chair type stair lift that can be used.

  In order to solve the problems as described above, the present invention divides the middle of the rail located on the lower floor side of the rail arranged along the wall surface of the staircase so as to guide the up-and-down movement of the chair. The upper floor side from the divided part of the above is a fixed rail for the staircase and the lower floor end side is a movable rail, and the movable rail is rotated between the extended position with respect to the fixed rail and the upper storage position of the fixed rail. In the chair type stair lift that can be made to be fixed, a deceleration instruction member is fixed to the outer surface of the end portion of the fixed rail and the movable rail on the dividing side, and the deceleration instruction member is detected on the chair that moves along the rail The structure which provided the detection member which decelerates the running speed of a chair by this is employ | adopted.

  The rack chain is fixed to the rail along the length direction, the rack chain is divided at a divided portion of the fixed rail and the movable rail, and the fixed rail side divided end portion of the rack chain is a divided end of the fixed rail. The movable rail side dividing end portion can be fixed to the movable rail dividing end portion by using a chain fixing bracket.

  In addition, a joint bracket is fixed to the divided end portion of the fixed rail and the movable rail, a protrusion protruding toward the movable rail side is provided on the joint bracket of the fixed rail, and the movable rail side joint bracket is provided with a movable rail. It is good also as a structure which provided the hook-shaped protrusion which contact | abuts on the upper surface and side surface of the said protrusion in the state which is located in an extended form with respect to a fixed rail.

  Here, the rail has a substantially cylindrical shape with an open bottom and has a cross-sectional shape in which a rack chain is provided on the lower surface of an intermediate plate provided inside, and is fixedly disposed on the stairs using a support along the wall surface of the stairs. The chair attached to the rail with groove-shaped wheels is moved up and down along the rail by engaging the pinion of the lifting mechanism with the rack chain and activating the lifting mechanism.

  The rail storage device divides a portion near the end located on the lower floor side of the rail arranged along the wall surface of the stairs so as to guide the up-and-down movement of the chair, and the upper floor from the divided portion of the rail. The side is fixed rail to the staircase, the lower floor end side is a movable rail, and the movable rail is extended to the fixed rail at the split side end of the fixed rail and the movable rail. The fixed side mounting plate and the movable side mounting plate are pivoted to a support shaft fixed at one end to the fixed side mounting plate, and the other end is pivoted to a support shaft fixed to the movable side mounting plate. The rotating arm is connected with a stationary rotating arm, and the rotating arm is undulated and swung by a rotational drive mechanism provided on the fixed side mounting plate. The movable rail pivoted on the other end of the rotating arm is extended with respect to the fixed rail. Position of the fixed rail And it is adapted to pivot between the parts storage position.

  The deceleration instructing member is formed on a long plate along the length of the rail using stainless steel, which is a different material from the aluminum forming the rail, and the outer side surface on the opposite side of the staircase wall surface of the fixed rail and the movable rail. The detection member is attached to the chair so as to face the deceleration instruction member, and is formed by a proximity switch that operates by detecting aluminum, which is a foreign material, and stainless steel.

  The above-mentioned chain fixing bracket is formed by bending a metal plate in a U-shaped cross-section downward, and is fitted by inserting a chain into a plurality of pin fitting portions provided on the side plates on both sides. The chain fixing bracket is attached to a fixed rail and a movable rail. By fixing to the intermediate plate of the divided end portion with screws, the divided end portion of the chain is held so as not to hang down.

  According to this invention, the detection instruction member which decelerates the traveling speed of the chair by fixing the deceleration instruction member to the divided side end portions of the fixed rail and the movable rail and detecting the deceleration instruction member on the chair moving along the rail. Since the chair is decelerated and passed through the joint between the fixed rail and the movable rail, it is possible to reduce the occurrence of vibration at the rail joint, and the fear of the elderly and disabled people who are users Can be used comfortably.

  In addition, the rack chain is divided at the dividing part of the fixed rail and the movable rail, and the divided end of the rack chain is fixed to the divided end of the fixed rail and the movable rail with the chain fixing bracket. It is possible to store rails that contain rack chain, and when the movable rail is extended with respect to the fixed rail, the rack chain is in a continuous arrangement, and the chair passes smoothly through the rail joint, Since the chain does not hang down, the design, hygiene and safety can be improved.

  Furthermore, the joint bracket is fixed to the split end portion of the fixed rail and the movable rail, and the movable rail is extended with respect to the fixed rail. Is made to contact the upper surface and the side surface, so that the joint portion by dividing the fixed rail and the movable rail can be made to have no step, and the hook-shaped protrusion contacts the side surface of the protrusion. The torsional force applied to the movable rail by the chair can be supported, so that there is no step or misalignment at the joint between the fixed rail and the movable rail, and the occurrence of vibration at the rail joint is reduced. Can be used comfortably, relieving the fear of the elderly and disabled people who are users.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 3, the chair-type stair lift 1 is installed in a slanted manner by attaching a pair of rails 2 that are parallel in the vertical direction along the wall surface B of the staircase A to the column 3 fixed to the staircase A. A chair 4 is attached to the upper and lower rails 2.

  As shown in FIG. 5 (b), the upper and lower rails 2 have a substantially cylindrical shape with an open lower portion and a cross-sectional shape in which a rack chain 6 is provided on the lower surface of an intermediate plate 5 provided therein. The chair 4 mounted with the groove-shaped wheel 7 is engaged with the rack chain 6 by engaging the pinion 9 of the lifting mechanism 8 that is operated by the power source provided in the chair 4, and the lifting mechanism 8 is activated to move along the rail 2. It will move up and down.

  As shown in FIGS. 6 to 8, the upper and lower rails 2 described above are divided in the middle of the end portion located on the lower floor side at a position equal to the upper and lower sides of a predetermined length from the end portion, and the upper floor side is separated from the divided portion. The fixed rail 2a fixed to the staircase A, the lower floor end portion side is a movable rail 2b, and a steel plate is used at the position on the wall surface B side of the staircase A at the divided end portion of the fixed rail 2a and the movable rail 2b. The mounting plates 10 and 11 are fixed, respectively.

  The mounting plate 10 fixed to the upper and lower fixed rails 2a is supported at both ends by columns 12 fixed on the staircase A, and the column 12 supports the load applied to the divided side end of the fixed rail 2a. At the same time, the fixed-side mounting plate 10 and the movable-side mounting plate 11 fixed to the upper and lower movable rail 2b are in a state in which the side edges abut each other at the position where the movable rail 2b extends with respect to the fixed rail 2a. An abutting side edge of the mounting plates 10 and 11 and a bracket 13 fixed to the movable side mounting plate 11 so that the movable rail 2b contacts the lower floor of the staircase A in the extended state of the fixed rail 2a. It supports the applied load.

  The fixed-side mounting plate 10 and the movable-side mounting plate 11 are connected by a rotating arm 14, a rotating drive mechanism 15 for the rotating arm 14 is mounted on the fixed-side mounting plate 10, and the rotating arm 14 is undulated by the rotating drive mechanism 15. By moving the movable rail 2b, the movable rail 2b can be rotated between a position extended with respect to the fixed rail 2a and a storage position positioned above the fixed rail 2a. In 14, a posture holding mechanism 16 for holding the movable rail 2 b rotated by swinging of the rotary arm 14 in a constant posture is housed in a concealing manner.

  The rotating arm 14 uses two steel plates, and a spacer or a reinforcing material is sandwiched between them, so that there is a gap between the opposing surfaces. As shown in FIG. It is pivotally fixed to the support shaft 17 fixed so as not to rotate by welding at a position between the upper and lower fixed rails 2a at a substantially central portion of the plate 10 via a bearing 18, and the other end is as shown in FIG. 9B. The support shaft 19 is fixed to the support shaft 19 fixed by welding at a position between the upper and lower movable rails 2b at the substantially central portion of the movable-side mounting plate 11 via a bearing 20, and the support shaft 17 of the fixed-side mounting plate 10 is swung around the fulcrum. By moving, the movable rail 2b is rotated with respect to the fixed rail 2a between the extended position of the fixed rail 2a and the upper storage position of the fixed rail 2a.

  The rotary drive mechanism 15 for swinging the rotary arm 14 fixes the geared motor 21 to the fixed side mounting plate 10 and rotates to the small-diameter drive sprocket 22 of the motor 21 and the support shaft 17 fixed to the fixed side mounting plate 10. As shown in FIG. 9A, the large-diameter sprocket 23 that is attached is interlocked by a chain 24, and the large-diameter sprocket 23 and the end of the rotary arm 14 on the fixed rail 2a side are integrally fixed by welding, so that the motor 21 By rotating the large-diameter sprocket 23 by decelerating, the rotary arm 14 is swung around the support shaft 17 on the fixed rail 2a side as a fulcrum.

  As shown in FIGS. 9A and 9B, the posture holding mechanism 16 has sprockets 25 and 26 attached to both support shafts 17 and 19 between the two rotary arms 14 with respect to the support shafts 17 and 19, respectively. By mounting the endless chain 27 between the sprockets 25 and 26 at both ends via a plurality of intermediate sprockets 28 provided between the two rotating arms 14, as shown in FIG. The endless chain 27 is also swung integrally when the rotating arm 14 is swung, and the meshing position of the endless chain 27 is changed with respect to the sprocket 25 that cannot rotate with respect to the fixed support shaft 17. By rotating the chain 27, the movable side support shaft 19 and the movable side mounting plate 11 fixed thereto are rotated, whereby the movable rail 2b is substantially replaced with the fixed rail 2a. And it is adapted to pivot in a posture in which the line.

  On the fixed side support plate 10, the movable rail 2b pushes up and supports the end of the rotating arm 14 on the fixed rail 2a side in an extended state of the fixed rail 2a, and assists the rotation of the movable rail 2b to the storage position. , A cylinder 29 that slows down, a limit switch 30 that stops the motor 21 by detecting the standing of the rotary arm 14 at the storage position of the movable rail 2b, and is movable in an extended state of the movable rail 2b with respect to the fixed rail 2a. A limit switch 31 for detecting the side edge of the side mounting plate 11 and stopping the motor 21 is provided.

  2 and 3, the rail storage device is covered and concealed by covers 32 and 33, respectively.

  At the end of the fixed rail 2a and the movable rail 2b located on the upper side, the deceleration instruction member 34 is fixed to the outer side surface opposite to the staircase wall surface, and the chair 4 moving along the rail 2 is instructed to decelerate. A detection member 35 that reduces the traveling speed of the chair 4 by detecting the member 34 is provided.

  The deceleration instructing member 34 is formed on a long plate along the length direction of the rail 2 using stainless steel, which is a heterogeneous material, with aluminum forming the rail 2, and is formed on the fixed rail 2a and the movable rail 2b located on the upper side. As shown in FIG. 5B, the detection member 35 is a proximity switch that is attached to the chair 4 so as to face the deceleration instructing member 34 and operates by detecting aluminum that is a foreign material and stainless steel. Is formed.

  The rack chain 6 is fixed to the rail 2 along the length direction. The rack chain 6 is divided at a divided portion of the fixed rail 2a and the movable rail qb, and the fixed end of the rack chain 6 on the fixed rail 2a side. Are fixed to the split end of the fixed rail 2a, and the split end of the movable rail 2b is fixed to the split end of the movable rail 2b using a chain fixing bracket 36, respectively, and the split end of the chain 6 is suspended. Not to hold.

  Also, as shown in FIG. 4, the rectangular block-shaped joint fittings 37 and 38 that fit into the upper space from the intermediate plate 5 of the fixed rail 2a and the movable rail 2b at the divided end portions of the fixed rail 2a and the movable rail 2b. Is provided, and a projection 39 protruding toward the movable rail is provided on the joint bracket 37 of the fixed rail 2a, and the movable rail 2b extends from the fixed rail 2a on the joint bracket 38 on the movable rail 2b side. In the state where it is located, a saddle-shaped projection 40 having an inverted L-shape is provided that contacts the upper surface of the projection 39 and the side surface facing the step wall surface.

  The chain fixing metal fitting 36 is formed by bending a metal plate into a U-shaped cross section downward as shown in FIG. 4D, and the pins of the chain 6 are fitted into a plurality of pin fitting portions 41 provided on both side plates. It is structured to be installed.

  The chain fixture 36 is overlapped on the lower surface of the intermediate plate 5 of the fixed rail 2a and the movable rail 2b, and the joint fixtures 37 and 38 are inserted into the upper space from the intermediate plate 5 of the fixed rail 2a and the movable rail 2a. By screwing the screw 42 from the chain fixing bracket 36 into the joint bracket 37 or 38, the chain fixing bracket 36 and the joint bracket 37 or 38 are simultaneously fixed to the fixed rail 2a or the movable rail 2b.

  The chair type stair lift of the present invention is configured as described above. When the chair type stair lift 1 is used, the movable rail 2b is extended to the tip of the fixed rail 2a as shown in the solid line of FIG. 1 and FIG. The arrangement is as follows. In each drawing, the movable rail 2b is linear, but may be curved downward depending on the staircase conditions.

  In this state, the joint between the fixed rail 2a and the movable rail 2b is such that the rear end of the movable rail 2b hits the tip of the fixed rail 2a, the side edges of both the mounting plates 10 and 11 abut, and the movable side mounting plate 11 is connected to the lower floor of the staircase, the rack chain 6 of the rail 2 is extended, and the protrusion of the joint bracket 37 fixed to the front end of the fixed rail 2a The hook-shaped protrusion 40 of the joint fitting 38 fixed to the rear end of the movable rail 2b is circumscribed, and the fixed rail 2a and the movable rail 2b are connected in an extended shape.

  Therefore, the chair 4 that moves up and down along the rail 2 can enter the movable rail 2b from the fixed rail 2a, and can be lowered to a portion on the lower floor of the stairs A.

  When the chair 4 approaches the joint between the fixed rail 2a and the movable rail 2b at a normal speed, the proximity switch 35 provided on the chair 4 detects the deceleration instruction member 34, and the lifting mechanism 8 of the chair 4 is detected by this detection signal. Is controlled to reduce the speed of the chair 4, and the chair 4 becomes low speed when passing through the joint between the fixed rail 2 a and the movable rail 2 b, so that the occurrence of shock (vibration) is reduced and the user feels fear Relieve the ride and improve the ride comfort.

  When the chair 4 passes through the joint between the fixed rail 2a and the movable rail 2b and the proximity switch 35 is separated from the deceleration instruction member 34, the lifting mechanism 8 returns to the original driving speed, and the chair 4 travels at a normal speed. It will be.

  As described above, when the chair 4 passes through the joint between the fixed rail 2a and the movable rail 2b, the separation end of the rack chain 6 provided on the fixed rail 2a and the movable rail 2b is located between the fixed rail 2a and the movable rail 2b. Since it is fixed by the chain fixing bracket 36 so that it does not hang down at the cut-off end, and the pin pitch is in a continuous state, the pinion of the lifting mechanism moves smoothly between the fixed rail and the rack chain of the movable rail 2b. The chair can pass through the joint between the fixed rail and the movable rail 2b without any trouble.

  Further, in the extended state of the movable rail 2b with respect to the fixed rail 2a, a hook-shaped protrusion 40 of the joint fitting 38 fixed to the rear end of the movable rail 2b is formed on the protrusion 39 of the joint fitting 37 fixed to the tip of the fixed rail 2a. Since it is circumscribed, there is no vertical step at the abutting end of the fixed rail 2a and the movable rail 2b, thereby generating an impact when the chair 4 passes through the joint between the fixed rail 2a and the movable rail 2b. It can be reduced, the feeling of fear felt by the user can be eased, and the riding comfort can be improved.

  The hook-shaped protrusion 40 of the joint fitting 38 fixed to the rear end of the movable rail 2b is in contact with the side face of the protrusion 39 facing the stepped wall surface with respect to the protrusion 39 of the joint fitting 37 fixed to the tip of the fixed rail 2a. Therefore, even if the load of the chair 4 acts on the movable rail 2b and a force is generated at the joint between the fixed rail 2a and the movable rail 2b to twist the movable rail 2b toward the side opposite to the staircase wall surface. It can support reliably and can suppress the generation | occurrence | production of the vibration by the twist of a joint part at the time of passage of the chair 4. FIG.

  When the chair type stair lift 1 is not used, the chair 4 is lifted along the rail 2 and moved to the standby position set on the upper floor side of the stair A as shown in FIG. When the storage switch of the operation box arranged at the appropriate position on the lower floor of the staircase A is pressed while the motor is electrically detected in the standby position, the motor 21 is activated and the rotary arm 14 is rotated upward. The movable rail 2b attached to the other end of the rotary arm 14 is lifted from the lower floor surface of the staircase A and stored in a posture substantially parallel to the upper position of the fixed rail 2a, as shown in FIGS. The protruding portion of the rail 2 from the lower floor surface B of the stairs A to the floor surface is eliminated, and safety against walking on the lower floor surface of the stairs A is ensured.

  When the chair-type stair lift 1 is used in a state where the movable rail 2b is stored in a position substantially parallel to the upper portion of the fixed rail 2a, when the use switch of the operation box arranged at the appropriate position on the lower floor of the stair A is pressed. The rotating arm 14 is rotated downward, and the movable rail 2b is rotated downward on the lower floor surface of the staircase A, so that the movable rail 2b is extended at the tip of the fixed rail 2a.

Front view of the chair-type stair lift of the present invention with the movable rail in the extended position, as viewed toward the staircase wall A perspective view of the chair-type stair lift with the movable rail in the extended position A perspective view of a folded state with the movable rails of a chair type stair lift (A) is a longitudinal sectional view in a separated state showing the end structure of the fixed rail and the movable rail, (b) is a longitudinal sectional view in a state where the fixed rail and the movable rail are similarly connected, and (c) is an exploded view of the joint bracket. (D) is a perspective view seen from below the chain fixing bracket. (A) is the enlarged front view which shows the relationship between the raising / lowering mechanism provided in the chair, and a rail, (b) is the expanded vertical side view in the arrow bb line of (a). Rear view from the staircase wall side with the movable rail in the extended position showing the rail storage device of the chair type stair lift Enlarged rear view from the staircase wall side with the movable rail showing the rail storage device in the extended position Enlarged rear view from the wall surface of the staircase in the folded state that houses the movable rail that shows the rail storage device FIG. 7 is an enlarged vertical side view taken along the line aa in FIG. 7, and FIG. 7B is an enlarged vertical side view taken along the line bb in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chair type stair-lift device 2 Rail 2a Fixed rail 2b Movable rail 3 Support column 4 Chair 5 Intermediate plate 6 Rack chain 7 Wheel 8 Lifting mechanism 9 Pinion 10 Mounting plate 11 Mounting plate 12 Supporting column 13 Bracket 14 Rotating arm 14 Rotating drive mechanism 16 Posture Holding mechanism 17 Support shaft 18 Bearing 19 Support shaft 20 Bearing 21 Geared motor 22 Small diameter drive sprocket 23 Large diameter sprocket 24 Chain 25 Sprocket 26 Sprocket 27 Endless chain 28 Intermediate sprocket 29 Cylinder 30 Limit switch 31 Limit switch 32 Cover 33 Cover 34 Deceleration instruction Member 35 Detection member 36 Chain fixing metal fitting 37 Joint metal fitting 38 Joint metal fitting 39 Protrusion 40 Hook-shaped protrusion 41 Pin fitting part 42 Screw

Claims (3)

The rail located along the wall of the stairs to guide the up and down movement of the chair is divided in the middle of the end located near the lower floor, and the upper floor from the divided portion of the rail is fixed to the stairs, In the chair type stair lift, the lower floor end side is a movable rail, and the movable rail can be rotated between a position extended with respect to the fixed rail and the upper storage position of the fixed rail.
A decelerating instruction member is fixed to the outer surface of the end of the fixed rail and the movable rail on the dividing side, and a detection member is provided on the chair that moves along the rail to decelerate the running speed of the chair by detecting the decelerating instruction member. This is a chair type stair lift.   The rack chain is fixed to the rail along the length direction, the rack chain is divided at a divided portion of the fixed rail and the movable rail, and the fixed rail side divided end portion of the rack chain is a divided end of the fixed rail. The chair-type stair lift according to claim 1, wherein the movable rail side divided end portion is fixed to the movable rail divided end portion using a chain fixing bracket.   A joint bracket is fixed to the divided end portion of the fixed rail and the movable rail, a projection protruding toward the movable rail is provided on the joint bracket of the fixed rail, and the movable rail is fixed to the joint bracket on the movable rail side. The chair-type stair lift according to claim 1 or 2, further comprising a hook-shaped protrusion that abuts on an upper surface and a side surface of the protrusion in a state of being extended with respect to the rail.

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