JPS6351955B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a rail fixedly installed on a staircase, an elevating body movably attached to the rail and supporting a platform, and a drive device that moves the elevating body up and down the rail track. The present invention relates to a stair lifting device having a stair lifting device.

In the stair lifting device of the above type, if the platform is a chair, which is mainly used by people who have difficulty going up and down stairs, such as the elderly or the physically disabled, the wire There is a need for a safety device that can reliably stop the elevating body in the event of an accident such as the rope becoming slack or breaking.

SUMMARY OF THE INVENTION An object of the present invention is to provide a stair lifting device that can reliably stop a platform even if the above-mentioned accident occurs, and is equipped with a simple and inexpensive safety device.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 and 2, a rail 2 is installed on a staircase 1, and the rail 2 is provided along one side edge of the staircase 1 as shown in FIG. rail 2
An elevating body 3 is movably attached to the. In this case, as shown in FIG. 3, the rail 2 consists of a flat plate 2a and rail parts 2b that are erected and fixed near both sides of the flat plate 2a. Roller 3a is rotatably installed,
This roller 3a is loosely fitted within the frame of the rail portion 2b and is in contact with the flat plate 2a.

In FIGS. 2 and 4, a platform configured as a chair 5 is supported on the elevating body 3 via a support plate 4. As shown in FIGS. The support plate 4 is formed in a dogleg shape, and one end is fixed to the elevating body 3 with bolts, etc., and a disk 6 is fixed to the other end, and the support shaft 7 of the chair 5 is fixed to the center hole of this disk. It is rotatably inserted and fitted. A suitable number of small holes 6a are formed on the circumferential surface of the disc 6.
is formed. Further, on the back of the chair 5, a lever 8 for fixing the position is provided, which is pivotally connected to the chair 5 with a pivot pin 8a. One end of the lever 8 protrudes slightly from the chair 5, and the other end is bent at a nearly right angle to form a circular shape. It is fitted into the small hole 6a of the plate 6. This lever 8 has
The other end of the tension spring 9, which has one end fixed, is locked, giving the lever 8 a clockwise rotation movement in FIG. 4 about the pivot pin 8a. The action of the tension spring 9 ensures that the lever 8 is fitted into the small hole 6a.

In the chair 5 constructed in this manner, when the lever 8 is moved in the direction of the arrow P in FIG.
The direction of the chair 5 can be changed freely, and the rotation of the chair 5 can be prevented by fitting the small hole 6a and the lever 8 during elevation and descent, which is advantageous in terms of safety.

The support shaft 7 of the chair 5 passes through the disc 6 and reaches into the receiving member 10 provided at the bottom of the disc 6. At least the part of this support shaft 7 that enters into the receiving member 10, that is, the lower part of the support shaft 7 is the fifth
As shown in the figure, a missing part 7a where a part of the circumferential surface is missing
is formed. Further, a hole 10a is formed in a part of the receiving member 10, and this hole 10a is formed at a position opposite to the missing portion 7a when the chair 5 faces forward. A brake rod 11 of a switch (not shown) is fitted into this hole 10a, and this terminal 11 is constantly pressed in the direction of the support shaft 7 by a pressing spring 12. In this case, the switch is, for example, a limit switch, and when the actuating rod 11 comes into contact with the missing portion 7a shown by the solid line, the switch is turned on by actuating the actuator, and the chair 5 rotates and is pushed by the circumferential surface of the support shaft 7. It is configured to turn OFF when

According to this configuration, when the chair 5 faces forward, the switch is turned on and the drive device described later can be driven. Also, if the chair is facing other than the front, the switch will naturally turn off, so it will not be moved up or down.

In this example, a drive device 13 for moving the elevating body 3 up and down on the track of the rail 2 is provided on the uppermost side of the rail 2, as shown in FIG. This drive device 13 has a casing 14, in which a drive motor 15, a reduction gear 16, and a wire reel 17 around which a wire 18 is wound are provided. The tip of a wire 18 wound around the wire reel 17 is fixed to a predetermined position of the elevating body 3, and the elevating body 3 moves up and down via this wire 18. Note that the wire 18 is made of a very durable material.

In the drive device 13, a drive motor 15 and a reducer 16 connected to the output shaft of the drive motor are arranged side by side under the rail 2, and a wire reel 17 is arranged above the reducer. The wire reel 17 is drivingly connected to a drive motor 15 via a reduction gear 16. This wire reel 17 is fixed to the output shaft 16a of the reducer 16 as shown in FIG.
A leaf spring member 19 is attached to this reel. The elastic action of the leaf spring member 19 is biased in the direction of the arrow in FIG.
A contact piece 20 that comes into contact with 8 is provided. A limit switch 21 is disposed adjacent to the leaf spring member 19, and this switch can drive the drive device when the actuator 21a is pushed by the leaf spring member 19. When the wire 18 is cut or loosened, the leaf spring member 19
moves to the position shown by the chain line, and the switch is turned off. That is, the drive device stops.

The elevating body 3 includes a first safety device that can immediately stop the wire 18 when it becomes loose or breaks, and when the elevating body 3 suddenly descends while the wire 18 itself is under tension due to a failure of the reducer or the like, for example. It is equipped with a second safety device that can immediately stop this.

In FIG. 7, the elevating body 3 has a braking means 22 that is rotatable between a movable position where the elevating body 3 is movable and a braking position where the elevating body 3 is stopped. In this embodiment, the braking means is constituted by a shaft 23 that passes through both side plates of the elevating body 3 and is rotatably attached to the both side plates, and an eccentric roller 24 that is eccentrically fixed to both ends of this shaft. It includes a braking member and an actuating member 25 fixed to the shaft 23 inside the elevating body 3. In this case, the actuating member 25 has one end fixed to the shaft 23 and the other end being a free end, to which the actuating rod 26 is attached. In the movable position shown by the solid line in FIG. 8, the eccentric roller 24 is located slightly above the upper surface of the rail portion 2b of the rail 2, and in the braking position,
As shown by the chain line in FIG. 8, the circumferential surface of the eccentric roller 24 comes into contact with the upper surface of the rail portion 2b, and the eccentric roller 24 is positioned in a non-rotatable state. In addition, an elastic means configured as a coil spring 27 whose one end is locked to the lifting body 3 and the other end is locked to the shaft 23 is provided in the lifting body 3, and this coil spring 27 is connected to the eccentric roller 24.
It is biased in the direction of movement to the braking position, that is, the clockwise rotation in FIG.

A wire 18 drivingly connecting the drive device 13 and the elevating body 3 enters the elevating body 3 and is fixed at a predetermined position relatively deep therein, that is, below the elevating body 3 in FIG. The elevating body 3 is supported by the wire 18, and therefore the wire 18 is always under tension. This tensioned wire 18 pushes up the actuating rod 26 and causes the actuating member 25 to move upward.
By rotating the shaft 23 through a predetermined angle, the eccentric roller 24 of the braking means 22 is held at a movable position away from the rail portion 2b.

According to the above configuration, if the wire 18 becomes loose or breaks due to some accident, the braking means 22 is actuated by the action of the coil spring 27, and the elevating body 3 is immediately stopped. That is, due to the action of the coil spring 27, the actuating member 25 rotates, and along with this, the eccentric roller 24 connected to the actuating member 25 via the shaft 23 rotates from the movable position to the braking position, and the eccentric roller 24 rotates. It comes into contact with the rail portion 2b and is stopped. Note that it is convenient to provide the circumferential surface of the eccentric roller 24 and the upper surface of the rail portion 2b with which this circumferential surface comes into contact with, for example, a notch so as to increase the frictional force.

As mentioned above, when the wire 18 becomes loose or breaks, the elevating body 3 immediately stops.
Alternatively, even if the wire 18 is under tension due to a failure of the motor 15, the elevating body 3 may suddenly descend. In such a case, the present invention can be immediately stopped by a second safety device, which will be described below.

7 and 9, a circular tube 28 is rotatably mounted on the shaft 23, and a cylindrical member 29 is fixed to this circular tube. Near the circumferential surface of the cylindrical member 29 is provided a centrifugal separation member configured as a lever 31 rotatably mounted at one end via a pin 30 . In this case, the lever 31 is pivotally mounted with a pin 30 so that the other end, which is the free end, lies forward in the downward rotation direction. This lever 31
A claw portion 31a is formed at the free end of the actuating member 25, and an engaging portion 25a is formed on the operating member 25. This claw portion 31a is inserted into the actuating member 25 when the lever 31 is opened at a predetermined angle or more about the pin 30.
It engages with the engaging portion 25a of. Note that a spring 31b biased in the opening direction by centrifugal force is attached to the lever 31.

The cylindrical member 29 is rotationally driven by contacting the rail 2 directly or indirectly, and in this example, is indirectly rotationally driven as described below. As shown in FIG. 7, a shaft 32 is rotatably mounted inside the elevating body 3, and a driven roller 33 that is driven by contacting the flat plate 2a of the rail 2 is fixed to the shaft 32. A relatively large-diameter sprocket 34 is fixed to the shaft 32, and this sprocket 34 is fixed to the circular tube 28 via a chain 35 and is wound around a relatively small-diameter sprocket 36. Note that the reference numeral 37 is a presser plate that prevents the chain 35 from loosening.

The operation mode of the second safety device configured in this way is as follows.

When the elevating body 3 descends to a predetermined speed or higher due to some kind of accident, the driven roller 33 rotates at a high speed, and this rotation is transmitted to the circular pipe 28 via the sprocket 34, chain 35, and sprocket 36. Due to the rotation of this circular tube, the cylindrical member 29
rotates. In this case, since the sprocket 36 on the cylindrical member 29 side has a smaller diameter than the sprocket 34 on the driven roller 33 side, the cylindrical member 29 rotates at a higher speed than the driven roller 33. As the cylindrical member 29 rotates, the lever 31 eventually opens by a predetermined angle or more about the pin 30, as shown by the chain line in FIG.
That is, the free end is lifted up by a predetermined amount or more. Note that this opening is facilitated by the spring 31a. When the lever 31 is opened by a predetermined angle or more, its tip claw portion 31a engages with the engaging portion 25a of the actuating member 25 fixed via the eccentric roller 24 and the shaft 23, and at this time, the lever 31 is opened by the rotational force of the cylindrical member 29. Hand actuating member 25
Rotate clockwise in Fig. 8. This results in
The eccentric roller 24 comes into contact with the rail portion 2b of the rail 2, and the elevating body 3 is thus stopped.

As described above, the second safety device operates, and it is advantageous that the elevating body can be reliably stopped by either the first safety device or the second safety device, no matter what kind of accident occurs during the ascent or descent.

Note that even if the lever opens due to centrifugal force when ascending, the second safety device does not open more than a predetermined angle, and even if it opens more than that, the operating member 25
This corresponds to the back side of the engaging portion 25a.

Next, although it is not the gist of the present invention, the electric circuit of the above-mentioned lifting device will be briefly explained using FIGS. 10 and 11.

FIG. 10 is an explanatory view showing each switch of the lifting device in its installed position, and the operating switch SW1, which is directly operated by the user, is attached to the side of the chair 5. In addition, on rail 2, switch SW2 is located near the downstairs position, switch SW3 is located near the upstairs position,
Then, switch slightly above switch SW3.
SW4 is fixedly installed. These switches
SW2, SW3, and SW4 are constituted by limit switches, for example, and the actuators of the switches are pressed by an actuating plate 37' provided on the side plate of the elevating body 3 to operate.

Furthermore, a switch SW5 (switch 21) provided on the wire reel portion described above and a switch SW6 operated by the rotation of the chair 5 are provided. During normal operation, SW5 is ON and SW6 is ON.
Since it is ON, the supply point of the forward rotation coil L1 and the reverse rotation coil L2 of the motor 15 is always connected to the power supply line A.

Assuming that the chair is currently in the downstairs position, SW
2 is OFF and SW3 is ON, so by selecting the B line with the hand-operated switch SW1, the coil R1 of the forward/reverse switching relay R is energized. This allows relay contacts 1-2, 4-
5 are connected, the normal rotation coil L1 is energized and at the same time, the capacitor connection relay K is energized and the capacitor C is inserted. Therefore, the motor 15 rotates normally and the chair rises. At that time, SW2 returns to the ON state. Further, when the chair 5 reaches SW3, the SW3 is turned off and the rotation of the motor 15 is stopped.

Then, when the C line is selected with the operation switch, coil R2 of the reversing relay is energized through SW2, and the relay is switched and contacts 2-3, 5-
6 are connected. Therefore, the reversing coil L2 of the motor M is energized and the capacitor connection relay K is turned on to connect the capacitor C, so that the motor is reversed and the chair 5 is lowered.

When the chair 5 reaches SW2, SW2 is turned off and the motor stops rotating. Therefore, the chair 5 can be raised or lowered arbitrarily using the hand-operated switch.

If the motor does not stop even if the chair rises to SW3, the chair will come into contact with the final SW4, which will turn off the power path, and motor 1 will
5 is brought to an emergency stop. On the other hand, if the motor 15 does not stop even after reaching SW2, the wire becomes slack and SW5 is turned off, so the power supply path is similarly turned off and the motor 15 is brought to an emergency stop.

In addition, if the direction of the chair 5 is rotated by a predetermined angle from the normal direction, for safety reasons, the operation SW at hand should be
1 common line is cut by the SW 6 installed on the chair 5, so that the motor 15 cannot be started.

In addition, in FIGS. 10 and 11, the reference numeral 3
8 is a cord reel provided on the chair 5, code 39
is a cord wound on the cord reel 38.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be modified in various ways.
For example, the platform is not limited to a chair, but may also be a wheelchair or a platform that allows a person to go up and down while standing.Also, the safety device is a drive device installed in the chair itself, and a reel installed at the top of the rail. It can also be applied to a type of lifting device that lifts and lowers via.

[Brief explanation of the drawing]

FIG. 1 is a side view of the lifting device according to the present invention, and FIG.
The figure is a front view of Figure 1, Figure 3 is a cross-sectional view of the rail,
Figure 4 is an explanatory diagram of the chair seen from the back side, Figure 5 is
6 is a plan view of the reel portion of the drive device; FIG. 7 is a perspective view of the safety device; FIG. 8 is an explanatory side view showing the operation of the first safety device; FIG.
10 is an explanatory side view showing the operation of the second safety device, FIG. 10 is an explanatory side view showing the arrangement of each switch, and FIG. 11 is a circuit of the lifting device. DESCRIPTION OF SYMBOLS 1... Stairs, 2... Rail, 3... Elevating body, 13... Drive device, 18... Wire, 22... Braking means, 24...
Eccentric roller, 27... Coil spring, 29... Cylindrical member,
31...Lever.

Claims (1)

[Claims] 1. A stair lifting device comprising a rail fixedly installed on a staircase, a lifting body movably attached to the rail, and a drive device that moves the lifting body up and down the rail via a wire, in which a braking member rotatable between a movable position where the brake member is moved away from the rail and a braking position where the brake member is in contact with the rail; and a braking means that holds the brake member in the movable position by the wire; a cylindrical member that rotates as a result of the movement of the elevating body; a centrifugal separation member that has one end pivotally connected to the cylindrical member and whose other end floats as the cylindrical member rotates; and an engaging portion with which the other end of the centrifugal separation member that has floated is engaged, and when the other end of the centrifugal separation member engages with the engaging portion, the braking member rotates from the movable position to the braking position. A lifting device characterized by: