JPH06171864A - Chair type staircase elevator - Google Patents

Abstract

PURPOSE:To perform sure braking in a chair type staircase elevator of which a chair main body is elevately moved by rotation of a driving rotor threadedly engaged with a chain in a rail provided on the side part of a staircase by bringing a brake piece in face-contact with the brake groove provided on the rail. CONSTITUTION:Both ends of a chain 30 received in a rail arranged along the side part of a staircase are connected stopping bodies 60a, 60b provided on the upper and lower parts of the staircase. A chair main body is elevated in the condition of pulling the chain 30 of which the middle part is wound around a main sprocket 36, by driving a rotational driving body 35 provided on the chair main body movable along the rail so as to rotate the main sprocket 36. In this case, if abnormality such as cut-off of the chain is generated so as to lose tension of the chain 30, a catch puller 57 is rotationally moved clockwise by the force of a brake elastic body 53, the trapezoidal part on the extreme end of a brake piece 50 is engaged with the slope part 48a of a brake groove 45 in face contact, and hence the chair main body is immediately stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair type stair lift, and more particularly to an emergency stop mechanism.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 1, a chair-type stair lift moves up and down via a main sprocket that is rotated by a driving rotating body on a chain 30 in a rail 22 attached to an end of a stair 27. It is necessary to stop the elevator when the chain of the elevator is cut or the chain is loosened for some reason. Therefore, as an emergency stop device that operates by using the tension of the chain, a brake piece is attached to the catch puller hanging around the chain, and the balance between the catch puller force received from the chain and the elastic force of the brake elastic body is balanced. Therefore, the brake piece is operated. That is, when the elevator is normal, the brake elastic body is compressed by the tension of the chain and the brake piece 5 is pressed.
0a does not contact the groove 43 formed in the rail 22 (FIG. 7). On the other hand, when the chain of the elevator is loosened or cut for some reason, the chain loses its tension, so that the elastic force of the brake elastic body causes the brake piece 50a having a sharp tip to contact the groove 43 of the rail. Stop the elevator by contact resistance.

[0003]

However, in the conventional stop mechanism, as shown in FIG. 7, the groove 43 is formed flat. Therefore, when the elevator stops suddenly, the brake piece 50a comes into contact with the flat groove 43 and stops, but the tip of the brake piece 50a and the groove 43 of the rail make a line contact. Therefore, there are cases where the stop is not sufficient and a so-called slip phenomenon occurs, which makes it impossible to stop immediately. Therefore, the present invention provides a chair-type stair lift that eliminates the above problems.

[0004]

A chair-type stair lift according to the present invention is a chair main body attached via a pair of rollers rotating in guide grooves formed at both ends of a rail, and is attached to the chair main body. Rotation drive body, a main sprocket attached to the rotation drive body that is screwed into the chain to rotate, a brake piece rotatably attached to the chair body, and the chain rotatably attached to the brake piece. It has a catch puller that is wound around, a brake elastic body that presses the catch puller toward the chain side, and a brake groove formed in the rail so as to engage with the tip end portion of the brake piece.

[0005]

When the chair-type stair lift is normally moving, the brake elastic body is compressed by the chain tension due to the tension of the chain, and the brake piece does not come into contact with the rail. On the other hand, when the chain is cut or the chain is loosened for some reason, the brake piece is brought into contact with the rail by the action of the brake elastic body. The tip of the brake piece engages with and contacts a brake groove formed in the rail. That is, the brake piece comes into surface contact with the brake groove, the contact area increases, and the brake piece can be quickly stopped.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows a chair-type stair lift 20 including a stair 2
It moves up and down by a mechanism which will be described later through a chain 30 attached to the rail 22 fixed to the end of 7 by a support 28. 23
Is a chair body, 24 is a seat fixed on a rotatable chair body 23, 29 is a backrest and a pair of armrests attached to both sides of the back 21, 26a is a start button, 26b is an emergency stop button, and 25 is a rotation. It is a possible footstep. FIG. 2 shows a state in which the armrest 29, the seat 24, and the footrest 25 which are rotatable are bent to the wall side.
Can be stored without disturbing the stairs. Figure 3 shows the chair body 2
3 is a front sectional view when the cover of FIG. 3 is removed, and FIG. 4 is a side sectional view of FIG. A pair of chassis frames 31a, 31
A chassis plate 32 is provided on the upper side of b, and a base 33 for attaching the rotary drive body is provided on the lower side thereof. The rotary driving member 35 attached to the base 33 has a structure shown in FIG. 5, 1 is a case, 2 is a gear, 3 is a pinion shaft, 6 is a hypoid pinion shaft, 7 and 8 are bearings,
9 is a hypoid gear, 10 is a main sprocket 3 described later.
An output shaft connected to 6, an oil case 11 and a cover 12. The rotation of the hypoid pinion shaft 6 rotates the pinion shaft 6 fixed to the hypoid gear 9 to rotate the gear 4. The rotation of the gear 4 rotates the gear 2 to reduce the number of rotations and rotate the output shaft 10 to improve efficiency. The rotary drive 35 is equipped with a brake. The rail 22 is integrally formed with aluminum or the like in the sectional shape shown in FIG. 4, and guide grooves 39 for guiding the rollers 38 are formed at both ends. Further, in the groove 40 formed in the central portion, a horizontally rotatable guide roller 41 in FIG. 4 is attached to the chair body. Further, 42 is a chain groove for internally mounting the chain 30, 43 is a brake groove 45.
The brake groove 45 is formed by a pair of bank 48 having an inclined portion 48a having a shape to be engaged with a tip end of a brake piece 50 described later. That is, it is a structure in which it comes into surface contact with the brake piece 50. The pair of rollers 38,
38 rotates at both ends of a main shaft 46 pivotally supported by the chassis frames 31a and 31b.

Reference numeral 55 is an auxiliary sprocket, which is rotatably attached by a rotary shaft 52 pivotally supported by the chair body 23 and guides the chain 30. Also, 50 is "ku".
It is a character-like brake piece having a front end with an acute angle when viewed from the front (see FIG. 3) and a trapezoidal shape when viewed from the side (see FIG. 6), and is provided with a catch puller 57 that is rotatable by a rotating shaft 51a at the end. . The catch puller 57 maintains the state in which it is pressed toward the chain 30 side by the brake elastic body 53, but the elastic force of the brake elastic body 53 causes the brake piece 50 to brake when the tension of the chain 30 is normal. Groove 4
Selected as one that does not come into contact with 5. On the other hand, when the chain 30 is loosened or cut for some reason, the elastic force of the brake elastic body 53 causes the brake piece 50 to come into contact with the brake groove 45 and make an emergency stop. Further, the power is cut off by the operation of the catch switch 54 which detects the operation of the catch puller 57. 60a and 60b are provided at the top and bottom of the stairs,
A stop body for stopping the chair body 23, and the stop body 6
0a is a tension member 6 that absorbs the vibration of the chain 30 and the like.
The end portion of the chain 30 is fixed via 1a. The chain 30 includes a guide roller 64 and a main sprocket 3
6, the catch puller 57, the auxiliary sprocket 55, and the guide roller 65. Further, a different diameter roller 49 for guiding the chain 30 is attached to the side portion of the main sprocket 36. Further, 66 is a lower flap, which is attached so that the down-limit switch 66b operates by maintaining a state in which it is constantly projected by a spring 66a and abutting against a stop body 60a. By operating this down-limit switch 66b, Rotary drive 3
5 stops. On the other hand, 67 is an up flap, which is not always operated by the spring 67a,
0b, the up-limit switch 67b is actuated, and the rotary driver 35 stops. In addition, considering safety,
The up-final limit switch 68 is attached to a position that operates later than the up-limit switch 67b, and when the up-final limit switch 68 operates, the power is shut off as an abnormality occurs.

Next, the operation of the above configuration will be described. When the start button 26a is pressed, the main sprocket 36 rotates via the output shaft 10 of the rotary drive body 35, and the elevator 20 descends when it is in a stopped state at the upper portion and starts to rise when it is in a stopped state at the lower portion. However, the chain 30 maintains a specific tension via the guide rollers 64 and 65 and the auxiliary sprocket 55. Then, when the elevator 20 descends, the lower flap 66 comes into contact with the stop body 60a and the down limit switch 66b operates, the rotary drive body 35 stops. On the other hand, the elevator 20 moves up and the up flap 67
When hits the stop body 60b, the up-limit switch 67b operates to stop the rotary drive body 35. When the up limit switch 67b does not operate for some reason, the up final limit switch 68 operates and shuts off the power. On the other hand, when an abnormality occurs due to the chain 30 being cut or loosened, the tension of the chain 30 disappears. As a result, catch puller 57
Is rotated clockwise by the elastic force of the brake elastic body 53 as shown in FIG.
Engage with. The trapezoidal shape of the tip of the brake piece 50 and the inclined portion 48a on the upper portion of the brake groove 45 engage with each other (in a surface contact state) and stop due to frictional resistance. At the same time, the catch switch 54 operates to shut off the power supply. For this reason, at the same time when an emergency occurs, the elevator can be stopped immediately and the safety of the person on board can be secured. Although a trapezoidal shape is selected as the tip shape of the brake piece, it is also possible to form a brake groove that engages with such shape in a shape such as a saw shape that increases the contact area.

[0009]

Since the chair type stair lift according to the present invention is formed so that the brake pieces are in surface contact with the brake groove,
In an emergency, it can be stopped immediately without slipping.

[Brief description of drawings]

FIG. 1 is a view showing a chair type stair lift.

FIG. 2 is a view showing a state in which the chair type stair lift is folded.

FIG. 3 is a front sectional view of a chair body.

FIG. 4 is a side sectional view of a chair body.

FIG. 5 is a diagram showing a rotary drive body.

FIG. 6 is an enlarged view of a stop mechanism.

FIG. 7 is a view showing a conventional stop mechanism.

[Explanation of symbols]

 20 Chair type stair lift 22 Rail 23 Chair body 30 Chain 35 Rotational drive 36 Main sprocket 38 Roller 39 Guide groove 50 Brake piece 53 Brake elastic 54 Catch switch 55 Sub sprocket 57 Catch puller

Claims (1)

[Claims] 1. A chair body mounted via a pair of rollers that rotate in guide grooves formed at both ends of a rail, a rotation driving body mounted on the chair body, and screwed to a chain. The main sprocket attached to the rotating rotary drive, the brake piece rotatably attached to the chair body, the catch puller rotatably attached to the brake piece and hung around the chain, and the catch puller. A chair-type stair lift, comprising: a brake elastic body that is pressed toward the chain side; and a brake groove that is formed in the rail so as to engage with a tip end portion of a brake piece.