JPH11157764A - Stairway lift - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stairway lift which is applicable at reduced cost and using simple constitution to even a stairway which greatly changes in inclination angle in the vertical direction and which is horizontally curved in inward and outward directions, etc. SOLUTION: A large-diameter roller 7b and a hourglass-shaped roller 7c are integrally supported against the machine frame 15 of an elevating chair 9. The hourglass-shaped roller 7a is supported on an arm 13 supported in such a way as to freely oscillate about the support shaft 11 of the large diameter roller 7b, and an upper rail 3 is sandwiched between the rollers 7a, 7b. A plate 30 is supported in such a way as to freely oscillate about a roller 7c serving as the center O1 , and the hourglass-shaped roller 7c, cylinder rollers 7d, 7f, and side rollers 7e, 7h are supported on the plate 30, with the rollers 7c, 7d, 7f, 7g used to sandwich a lower rail 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stair climbing machine which moves up and down along stairs, and more particularly to a stair climbing machine having a different inclination angle in a horizontal direction and a vertical direction such as a predetermined gradient depending on a landing, and the like. The present invention relates to a stair climber having a curved guide rail.

[0002]

2. Description of the Related Art Conventionally, a chain rack is formed by enclosing a flexible chain on a guide rail, and a driving sprocket provided on an elevating chair is meshed with the rack, and the elevating chair is attached to the rail by a guide roller. A stair climber that moves up and down by being guided has been devised by the present applicant (see Japanese Patent Publication No. 6-57587). The stair climber lifts the chain by a predetermined amount when the drive sprocket meshes with the chain by arranging the flexible chain and the chain with a predetermined play in the holding portion of the guide rail, thereby maintaining a normal meshing relationship. However, this allows the vehicle to bend while traveling at a predetermined curvature in the vertical direction and the horizontal direction, and can be used for stairs that change to some extent in three dimensions. Also, rail flanges are provided at predetermined intervals in the vertical direction, and guide rollers are arranged on the rail flanges so that a predetermined moment from the lifting chair acts thereon, and a certain degree of inclination angle of the rails in the vertical direction The lifting chair is held in a horizontal state due to the difference.

[0003]

The above-mentioned prior art is applicable to, for example, those in which a guide rail is arranged on the outer side of a staircase having a 90-degree bent portion in the middle or those having a gentle curvature such as a spiral staircase. It is possible, for example, if there is a landing on the way and there is a horizontal guide,
A guide rail is arranged on a complicated stairway or an inner part of the staircase such as a bend which is bent at 0 ° and further bent at an angle of 90 ° in the opposite direction on the upper floor (having a curved portion inside and outside in the horizontal direction). It cannot be applied to those requiring a guide rail with a small curvature due to the above.

[0004] The present applicant also provides front and rear guide rollers so as to be vertically movable along the rails, and is also free to move by the same amount in the horizontal direction, so as to move along the guide rails that change in the vertical and horizontal directions. A stair climber that guides the elevating body has been devised (Japanese Patent Application No. 8-232311, not disclosed at the time of filing).

This device is suitable for a large-scale stair climbing machine that moves up and down with an electric wheelchair in a public facility such as a train station. However, a device for homes or the like that requires compactness and simplicity is used. However, since it is large and expensive, its application is difficult.

Therefore, the present invention can be applied to a staircase having a landing, a large change in the inclination angle in the vertical direction, and a curve having inward and outward turns in the horizontal direction with an inexpensive and compact configuration. It is an object to provide a possible stair climber.

[0007]

According to the first aspect of the present invention, there are provided first and second guide rails (3) and (4) installed vertically along a stair (2), and these guide rails. (7 ...) and the driving device (1)
0, 12), the stair lift (1) for transferring the lift along the guide rails based on the driving of the driving device. A first roller (7c) that is integrally supported by the machine frame (15, 15 ₁ ) of the elevating body and rolls above the second guide rail (4); and is integrally supported by the machine frame. And a second roller (7b) that rolls below the first guide (3) and is supported by an arm (13) swingably supported by a support shaft (11) of the second roller. And a third roller (7a) that sandwiches the first guide rail (3) with the second roller (7b), and further comprises a support shaft (7) for the first roller (7c). 2
A fourth roller (7d) supported by a support member (30) swingably supported around 9) and holding the second guide rail (4) with the first roller (7c); When,
Fifth and sixth rollers (7f) and (7g), which hold the second guide rail at a position separated by a predetermined distance from the first and fourth rollers, and a second guide rail (4). Side rollers (7e, 7h) rolling on the side
And the guide rails (3) and (4) have portions having different inclination angles in the vertical direction, have portions (A, B) curved in the horizontal direction, and have the first and second guide rails. Second
The line (O ₁ -O ₃ ) connecting the centers of the rollers is a constant angle (θ)
, The distance between the first and second guide rails (3) and (4) is set so as to hold the stairs.

According to a second aspect of the present invention, the guide rails (3) and (4) are circular in cross section, and the first roller (7c) and the fifth roller (7f) are drum-shaped rollers. The fourth roller (7d) and the sixth roller (7
2. The stair lift of claim 1, wherein g) comprises a cylindrical roller.

According to a third aspect of the present invention, in the first or second aspect, the first roller (7c) is arranged in the vicinity of a line of gravity (G) of the lifting body (9). Located on the stair climber.

According to a fourth aspect of the present invention, the distance (Pa) between the axes of the first and fifth rollers (7c) and (7f) is equal to that of the fourth and sixth rollers (7d) and (7g). The stair lift according to claim 1 or 2, wherein the stair lift is set to be larger than the center distance (Pb).

[Action] Based on the above structure, the lifting body (9)
The guide means (7...) Are driven by first and second guide rails (3) (4) based on the driving of the driving devices (10, 12).
It is transported by being guided and supported by. At this time, even if there is a landing or the like in the middle of the stairs (2) and the vertical direction has a predetermined inclination and a different inclination angle such as a horizontal part, the machine frame (15)
The first roller (7c) integrally supported on the first roller (7c) rolls over the second (for example, lower) guide rail (4), and the second roller (7b) is in contact with the third roller (7a). The elevating body (9) is transported while maintaining a predetermined posture by rolling and contacting with the first (for example, upper) guide rail (3) in cooperation.

Further, even if the guide rails (3) and (4) have a portion which is curved in the horizontal direction together with the above-mentioned different inclination angles in the vertical direction, the fourth roller (7d) can be used as the first roller (7c). By holding the second guide rail (4) between the second guide rail (4) and the fifth and sixth rollers (7f) (7g) holding the second guide rail (4) at different positions, the lifting body ( 9) is transferred stably.

At this time, even if the side rollers (7e, 7h) are disengaged from the rolling contact on the side surface of the second guide rail (4) in the curved portion in the horizontal direction, the first and fifth rollers (7c ) (7f) consists of a drum-shaped roller and
And the sixth roller (7d) (7g) is a cylindrical roller, so that the opposed rollers (7c and 7d), (7f and 7g)
g), the rollers are slightly moved in the left-right direction while being deformed in the direction of elastically expanding the inter-axis distance, so that the rollers are moved to the guide rails (4) at the shoulders of the drum-shaped rollers (7c) and (7f). The rolling contact (9) securely supports the elevating body (9) and smoothly guides and transports it.

The reference numerals in the parentheses are for comparison with the drawings, but do not limit the configuration of the present invention.

[0015]

According to the first aspect of the present invention, even if the guide rail changes the inclination angle in the vertical direction, the elevating body can be transported while always maintaining the predetermined posture. Since the second guide rail is pinched at different positions by the fourth roller and the fifth and sixth rollers, even if the guide rail has curved portions in the vertical and horizontal directions, the elevating body can be stabilized. Can be transported.

According to the second aspect of the present invention, the shoulder portions of the first and fifth drum-shaped rollers are elastic even when the side roller is disengaged from the rolling contact with the guide rail in the horizontal curved portion. By rolling contact with the guide roller, the moment load acting on the elevating body can be reliably supported, and the elevating body can be transported smoothly without any play.

According to the third aspect of the present invention, since the weight acting on the elevating body acts substantially directly on the first roller, the guide can be smoothly guided even in the curved portion of the guide rail. it can.

According to the fourth aspect of the present invention, in the curved portion of the guide rail, the elastic deformation of the distance between the shafts of the opposing rollers is facilitated so that the first and second rollers can be elastically guided. And the lifting body can be transported smoothly.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a stair climber according to the present invention.

The stair climber 1 has upper and lower two guide rails 3, 4 arranged in parallel along the side of the stairs 2. These rails have a circular cross section and one of them, for example, A rack device 5 is fixed to the lower surface of the upper (first) rail 3. The guide rails 3 and 4 have a vertical inclination angle different from each other due to the stairs having a landing 2a and the like, and have a curved portion at a connecting portion thereof, and also have different horizontal directions due to the bending of the stairs. (Inner portion A and outer portion B).

As shown in FIGS. 2 and 3, a plurality of guide rollers (guide means) 7a, 7b, 7c, 7d, 7e, 7f, 7g, 7
h (see FIGS. 6 and 7), the elevating chair 9 is always maintained in a horizontal state regardless of the change of the inclination angle and the bending of the guide rails 3 and 4 in the vertical direction. In addition, the guide is smoothly guided along the guide rail regardless of the horizontal curvature (to be described in detail later). Further, the lifting chair 9 has a motor 10 with a speed reducer.
, And a transmission shaft 11 is fixed to an output shaft 10a of the motor.

A rotating body 12 is integrally fixed to the transmission shaft 11 by a key, and collars 14 are provided on both sides thereof.
A large-diameter (second) guide roller 7b is rotatably supported, and the rotating body 12 is positioned in the axial direction. Further, an upper arm 13 is rotatably supported on the transmission shaft 11 on the machine frame 15 side of the lift chair, and a lower arm 17 is rotatably supported on the support frame 16 side of the rails 3 and 4. . That is, the transmission shaft 11 is mounted on the lifting chair machine frame 15.
Is rotatably supported by a lower arm 17 integrally fixed to the arm. A drum-shaped (third) tip of the upper arm 13
A guide roller 7a is rotatably supported, and at the tip of the lower arm 17, a drum-shaped (first) guide roller 7c and a guide roller unit 18 are supported to be swingable about the axis of the roller 7c. Have been.

On the other hand, a rack device 5 is welded along the lower surface of the upper rail 3. Flanges 12a, 12a are formed on both sides of the outer periphery of the rotating body 12 so as to protrude. Roller pins 19 are arranged and fixed at equal intervals on the circumference of the flanges. 2 and 4,
As shown in FIG. 5, these pins 19 are provided with rollers 20.
Are supported rotatably. These rollers 20 have a width of 2 to 2 times the tooth width (plate thickness) t (see FIG. 5) of the rack device 5.
Three or more times as long and the two flanges 1
It is retained at 2a and 12a.

As shown in FIG. 5, the roller 20 is formed in a middle-high (drum-shaped) cross section.
That is, the center hole into which the pin 19 of the roller 20 is inserted has the same diameter, but its outer diameter surface is formed in an elliptical shape (crown shape) such that its center is thicker and thinner toward both ends.
On the other hand, as shown in detail in FIG. 4, the rack device 5 is configured such that a number of rack units 5a having a predetermined length L are fixed to the lower surface of the rail 3 so as to be continuous in the longitudinal direction. Sprocket teeth 2 are provided on the lower surface of each unit 5a.
1 is formed. And these sprocket teeth 2
Each roller 20 provided on the rotating body 12 meshes sequentially with 1 as a rack tooth.

The rack units 5a are bent by a bending machine along the rails 3 that are curved in the vertical and horizontal directions. At this time, each rack unit 5a is bent in a state in which the sprocket teeth 21 are formed. Therefore, although the tooth gap is slightly narrowed (inwardly bent) or expanded (outwardly bent) by the vertical bending, the pitch line p-shaped is formed. The distance between the teeth and the distance between the roots, that is, the pitch, hardly changes, and the roller 20 is smoothly received and engaged by the rounded tapered shape of the tooth tip. Further, the sprocket teeth 21 change so as to have different intervals in the width direction of the sprocket due to the horizontal bending, but the interval (pitch) on the pitch line p in the width direction center line 1 hardly changes. The shape of the roller 20 enables smooth meshing.

Next, with reference to FIGS. 2, 3 and 6, and 7, a description will be given of a supporting device for supporting a lifting chair (elevating body) by a number of guide rollers.

[0027] The transmission shaft lower arm 17 which is rotatably supported through a bearing 25 to 11, the frame member 27 projecting from the rail side 15 ₁ of the elevator chair machine frame 15 by a screw 26 at its intermediate portion It is fixed to. Therefore, the lower arm 17 and the machine frame 15 are integrated,
The transmission shaft 11, the rotating body 12 supported by the transmission shaft 11, and the large-diameter roller 7b are supported by a machine frame 15. Also, the transmission shaft 11
The upper drum-shaped roller 7a provided on the upper arm 13 which is swingably supported at the center position of the upper drum 13 changes its center position relative to the machine frame 15.

Further, the lower drum-shaped (first) roller 7c is rotatably supported on the shaft 29 which is fixed to the machine frame 15 ₁ and its integral of the lower arm 17. And the shaft 2
9, the support plate 30 is rotatably supported between the machine frame side plate 15 ₁ and the roller 7c. A similar drum-shaped (fifth) guide roller 7f is rotatably supported on the upper end of the support plate 30 at its upper end, and further faces the lower drum-shaped guide roller 7c and the lower end drum-shaped 7f, respectively. Cylindrical (fourth and sixth) guide rollers 7d and 7g each having a predetermined length are rotatably supported. Side rollers 7e and 7h are rotatably supported between the guide rollers facing each other on the support plate 30 so that the rotation axis is orthogonal to the rollers 7d and 7g.

Each of the rollers 7c to 7h is supported by the guide roller unit 18 which is swingably supported about a shaft 29.
The drum-shaped rollers and cylindrical rollers 7c and 7d, 7f and 7g facing each other are rolled and contacted so as to clamp the lower (second) guide rail 4 from the upper and lower surfaces thereof at predetermined intervals, The two side rollers 7e and 7f roll on the side surface of the guide rail 4 so as to receive a moment based on the weight of the lift chair.

The center O _{1 of} the guide roller 7 c on which the weight of the lift chair 9 directly acts on the lower guide rail 4.
Is the substantially center position in the width direction of the elevating chair, that is, the center of gravity action line G
Although it is arranged in the vicinity and differs depending on the inclination angle of the guide rails 3 and 4, the weight of the lift chair 9 is
The center O ₂ of the upper guide roller 7a acting on the upper guide rail 3 through the center line ₂ is disposed at a position that does not greatly deviate from the center-of-gravity action line G. Further, the center O _{3 of the} transmission shaft 11 whose position with respect to the upper rail 3 is defined by the large-diameter roller 7b.
And the distance between the upper and lower guide rails 3 and 4 so that the angle θ between the horizontal line and the straight line connecting the center O _{1 of the} roller 7 c whose position with the lower rail 4 is defined by the guide roller 7 c is always constant. Is set.

As shown in FIG. 6, the interval Pa between the two drum-shaped (upper) rollers 7c and 7f of the guide unit 18 is
Than the interval Pb between the two cylindrical (lower) rollers 7d and 7g,
It is set to be relatively small by a predetermined amount (P
a> Pb).

Next, the operation of the above embodiment will be described. When the motor 10 is rotated by the switch-on, the rotation of the output shaft 10a via the reduction gear
Is transmitted to the rotating body 12 via the And the rotating body 1
2 is engaged with the sprocket teeth 21 of the rack device 5 so that the rotating body 12
Move along. At this time, the round surface b of the large-diameter guide roller 7b contacts one side of the lower surface of the rail 3 (the contact surface is indicated by oblique lines in FIG. 4), and the drum-shaped guide roller 7
a and the moment acting on the plane of FIG. 2 based on the weight of the elevating chair, the large-diameter guide roller 7b makes the round surface b contact the rail 3 and the side roller 7
e, 7h act in the direction of contact with the rail 4, and the distance between the rotating body 12 and the rack device 5 is kept constant based on the large diameter roller 7b and the drum-shaped guide roller 7a sandwiching the rail 3. And the sprocket teeth 21 of the roller 12
Accurately maintain the meshing relationship.

The weight acting on the lift chair 9 when a person gets on the seat 9a acts directly on the lower guide rail 4 from the machine frame 15 via the guide roller 7c. Further, an upper drum-shaped guide roller 7a whose distance is defined by the large-diameter roller 7b and the upper arm 13 is provided with the roller 7a,
Based on the fact that the position of the upper guide roller 7a is defined such that the line connecting the centers O ₂ -O ₃ of the guide rails 7 is orthogonal to the center line mm of the guide rail 3, a part of the weight of the lift chair 9 is reduced. , And is supported by the upper guide rail 3 via the upper guide roller 7a.

[0034] Then, the guide roller 7c provided in machine frame 15 _1, 7b, as described above, are surely rolling contact with the respective lower guide rail 4 and the upper guide rail 3 and the upper and lower guide rails 3 and 4, since the line O ₃ -O ₁ connecting the centers of the rollers 7b and 7c is set to maintain the predetermined angle θ, the solid line in FIG.
As shown in FIG. 3, even when the upper and lower rails 3 and 4 are at a predetermined gradient, and as shown in the dotted line of FIG. 3 and FIG. Face 9
a is held in a horizontal state. It should be noted that the elevating chair 9 is, of course, held in a horizontal state even when the guide rail is at a predetermined gradient or between the horizontal state.

Further, as shown in FIG. 8, the guide roller unit 18 has a support shaft 29 of the guide roller 7c at the center O.
Because it is swingably supported to _1, be different gradient in the vertical direction of the guide rails 4 as described above (predetermined tilt angle and a horizontal, etc.), also even during bending state, respectively facing The drum-shaped roller and the cylindrical rollers 7c and 7d, 7f and 7g securely and accurately hold the lower guide rail 4 from the upper and lower surfaces thereof, and particularly, play even when the guide rail 4 is curved in a vertical plane. Guide and move without pinching.

The upper drum-shaped guide roller 7a and the large-diameter roller 7b move based on the swing of the upper arm 13 irrespective of the gradient (predetermined angle or horizontal state) and curvature of the upper guide rail 3 in the vertical direction. The center line O ₂ −
Since O ₃ is arranged so as to be orthogonal to the center line mm of the upper rail 3, the upper rail 3 is pinched and guided without causing backlash. Thereby, even if there is a horizontal state in the middle of the stairs due to a landing or the like and a curved portion of a vertical plane connected thereto, the lift chair 9 moves smoothly while maintaining the horizontal state.

When the guide rails 3 and 4 are in the direct state in the horizontal direction, as shown in FIG. 9, both upper drum-shaped guide rollers 7c and 7f of the guide unit 18
Approximately the center part in the width direction is the center line m of the lower guide rail 4.
-M on a vertical plane, the two guide rollers 7c and 7f
Both side rollers 7 are aligned with the guide rail 4 and acted on by the moment acting in parallel with the plane of FIG.
e and 7h are pressed against the side surface of the guide rail 4. In this state, the weight of the elevating chair 9 is carried on the guide rails 3 and 4 via the guide rollers 7... And the elevating chair is smoothly moved.

Further, as shown in FIG. 5, in the horizontal linear portions of the guide rails 3 and 4,
The rotation plane 2 is parallel to the center line l-l of the rack device 5, and a substantially central portion of the roller 20 having a middle and high profile meshes with the sprocket teeth 21. In this state, the middle and high portions of the roller 20 are substantially aligned with the arcuate portion c (see FIG. 4) at the root of the sprocket teeth 21, and the movement proceeds in an accurate meshing state.

In the horizontal direction, when the guide rails 3 and 4 are curved inwardly A (FIG. 10) or outwardly B (FIG. 11), they have a relatively short but predetermined length in the axial direction of the rails. Each of the guide rollers 7 slightly deviates from the above-mentioned alignment state in the straight line, and a state in which both or one of the two side rollers 7e and 7h does not roll on the side surface of the guide rail appears. Even when the guide rails 3 and 4 are curved in the horizontal direction, the upper rollers 7c and 7f of the guide roller unit 18 are drum-shaped rollers and the lower rollers 7d and 7g are cylindrical rollers. some reason, (refer to C _2, C ₃₎ of FIG. as shown in 12, drum-shaped roller 7c, contact portion of the rail 4 of 7f is to slightly deviate in the width direction. Thereby, the opposing rollers 7c, 7d, 7f
The distance between the shafts 7g and 7g is slightly changed elastically, and the biasing force accompanying the elastic deformation is applied to the shoulders of the upper drum-shaped rollers 7c and 7d in contact with the rails (shown by hatching in FIGS. 10 and 11). ) To support and guide the elevating chair 9 without causing any obstacles such as razors.

At this time, as shown in FIGS. 6 and 7, the distance Pb between the lower guide rollers 7d and 7g is set smaller than the distance Pa between the upper guide rollers 7c and 7f (Pa> Pb). The above-described elastic deformation of the center distance between the rollers 7c and 7d, 7f and 7g that sandwich the rail 4 facing each other is relatively easily permitted, and the rollers 7c, 7f, and 7f of the guide roller unit 18 at the curved portion are relatively easy. Rolling of 7d and 7g is smoothed.

More specifically, the roller 7c is located near the line of action of the center of gravity G of the lift chair 9, and the weight of the lift chair can be substantially directly adjusted without exerting a large moment.
, The drum-shaped roller 7c on which the weight acts is exclusively used as the center, and the rail 4 is sandwiched between the roller 4c and the cylindrical roller 7d even in the horizontal curved portion. The drum-shaped roller 7f and the cylindrical roller 7g, which move and guide and are at the tip, are moved right and left with respect to the rail center line by the urging force based on the bending of the plate 30 in a state where no load is applied from the lifting chair 9. While moving in the direction shown in FIG.
As shown in (1), the rails 4 are deformed in a direction in which the inter-axis distance is elastically expanded, and the rails 4 are moved and guided by holding the rails 4 in order to carry a moment in the plane of the paper of FIG. The deflection of the plate 30 also acts on the base-side roller 7c due to the reaction, and the roller 7c also moves in the direction opposite to the roller 7d with respect to the rail center line, and the center distance between the roller 7d and the roller 7d. And the deformation amounts of the base side rollers 7c and 7d and the front side rollers 7f and 7g are
Distribute and balance.

In the guide rollers 7a and 7b guided by the upper rail 3, the line O ₂ -O ₃ connecting the centers of the rails is located at the center line m− Since the drum-shaped roller 7a is held at a position orthogonal to m, the center of the drum-shaped roller 7a in the width direction is held in an aligned state that is substantially positioned in a vertical plane of the rail center, and smoothly moves and guides.

Thus, even if the side rollers 7e and 7h are out of contact with the rails 4 in the portions where the rails 3 and 4 are curved in the horizontal direction, each of the guide rollers 7
a, 7b, 7c, 7d, 7h, 7g are guide rails 3,
The guide 4 is accurately guided and supported without rattling of the chair 4, and the lift chair 9 is transported smoothly and reliably.

When the guide rails 3 and 4 are located at the curved portions A and B in the horizontal direction, particularly at the portions where the guide rails 3 and 4 enter and exit the curved portions, the rotation plane of the rotating body 12 and the center line of the rack device 5 are arranged. are not parallel to each other, and the center of the roller 20 in the longitudinal direction is the center line l of the rack device 5.
-L. Even in this state, the roller 20 has a sprocket tooth 21 due to the middle-high shape.
, The movement is progressed while maintaining a secure meshing relationship, and the lift chair 9 is guided by a large number of guide rollers 7 so as to follow the horizontal curve of the rail. The rotation center of the rotator 12 is deflected so as to be directed to the center of curvature of the horizontal curve, and the roller 20 is rotated.
And the sprocket teeth 21 maintain an accurate meshing relationship.

In the above-described embodiment, a case has been described in which the present invention is applied to a home stair climber.
However, the present invention is not limited to this, and can be similarly applied to a public stair climbing machine at a station or the like that can carry the electric wheelchair up and down. In addition, the lifting chair is driven by the rack device 5 having the sprocket teeth 21 and the rotating body 12 having the rollers 20, but the present invention is not limited to this, and other driving means such as a chain rack may be used.
Of course, it is equally applicable.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a stair climber to which the present invention is applied.

FIG. 2 is a front sectional view showing a driving portion of the stair climber.

FIG. 3 is a side view showing the driving portion.

FIG. 4 is a side view showing the linear moving device.

FIG. 5 is a bottom view showing the linear moving device.

FIG. 6 is a side view of a guide rail inclined portion showing a support device for the elevating chair (body).

FIG. 7 is a side view of a horizontal portion of the guide rail.

FIG. 8 is a perspective view showing a guide roller unit.

FIG. 9 is a plan view showing a support state in a guide rail linear portion in a horizontal direction.

FIG. 10 is a plan view of an inner curve portion.

FIG. 11 is a plan view of an outer curve portion.

FIG. 12 is a front view showing a relationship between a guide rail and a guide roller.

[Explanation of symbols]

 Reference Signs List 1 stair lift 2 stairs 3 first (upper) guide rail 4 second (lower) guide rail 7 ... guide means 7a third roller 7b second roller 7c first roller 7d fourth roller 7h fifth Roller 7g Sixth roller 7e, h Side roller 9 Lifting body (chair) 10,12 Driving device (motor, rotating body) 11 Support shaft (transmission shaft) 15 Machine frame 18 Guide roller unit 29 Support shaft 30 Support member ( Plate) A, B Curved part θ Constant angle

Claims (4)

[Claims] 1. A first device installed vertically along a staircase
And a second guide rail, and an elevating body having a guide means and a driving device guided by these guide rails, and transporting the elevating body along the guide rail based on driving of the driving device. In the stair climbing machine, the guide means is integrally supported by the machine frame of the elevating body and is in contact with a first roller that rolls above the second guide rail, and is integrally supported by the machine frame, and A second roller rotatably contacting a lower side of the first guide, and the first guide rail supported by an arm supported by a support shaft of the second roller to be swingable and the second roller. And a third roller that sandwiches the second roller. The third roller is supported by a support member that is swingably supported around a support shaft of the first roller. The fourth that clamps the guide rail Rollers, fifth and sixth rollers for nipping the second guide rail at a predetermined distance from the first and fourth rollers, and side rolls which come into contact with the side surfaces of the second guide rail. And the guide rail has a portion having a different inclination angle in a vertical direction, a portion curved in a horizontal direction, and a line connecting the centers of the first and second rollers is constant. A stair climber, wherein an interval between the first and second guide rails is set so as to maintain a corner. 2. The guide rail has a circular cross section,
The stair climber according to claim 1, wherein the first roller and the fifth roller comprise a drum-shaped roller, and the fourth roller and the sixth roller comprise a cylindrical roller. 3. The stair climbing machine according to claim 1, wherein the first roller is arranged near a line of action of the center of gravity of the lifting body. 4. The stair climber according to claim 1, wherein an inter-axis distance between the first and fifth rollers is set to be larger than an inter-axis distance between the fourth and sixth rollers.