JPH0676261U - Stair lift - Google Patents

Abstract

(57) [Summary] [Purpose] Adjust the tension of the cord transmission member such as a belt or chain without trouble at a position where the elevator can be installed low, and use the mechanism to lift the elevator when cutting the cord transmission member. To stop safely. [Structure] A speed reducer 4 is connected to a motor 3 via a belt 7. A pinion 9 is attached to the output shaft 8 of the speed reducer 4, and the pinion 9 is meshed with the rack 11 of the rail 10. An electromagnetic brake is provided coaxially with the input shaft of the speed reducer 4. A tension roller 16 and a tension bolt 17 are provided on the tensioner 15.
Tension is applied by the roller 16 from the intersecting direction orthogonal to the belt 7. Belt tensioner 15 with spring 7
Energize to the side. When cutting the belt 7, the tensioner 1
5, the safety switch is activated, the power is cut off, the motor 3 is stopped, and the electromagnetic brake is activated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stair lift for lifting people or luggage on stairs, and more particularly to an improved technique of a drive mechanism in which a motor and a speed reducer are connected by a cord transmission member such as a belt or a chain.

[0002]

[Prior art]

 Conventionally, as a drive mechanism for stair lifts, a technique has been known in which tension is applied to the cord transmission member from above and below. According to this technique, it is necessary to provide a space for tension adjustment in the vertical direction. Not only did the position of the seat become higher and the stability deteriorated, but the seat position was higher, which made it difficult to sit down. Therefore, conventionally, for example, as shown in FIG. 5, a motor 31 is installed on an oscillating plate 32, and a belt 36 is diagonally hung between a pulley 33 of the motor 31 and a pulley 35 of a speed reducer 34. A technique has been proposed in which the tension adjusting stroke of the belt 36 can be shortened by swinging the motor 31 with the tension bolt 37 via the swing plate 32.

Further, as shown in FIG. 6, the geared motor 40 and the sprocket wheel 41 are obliquely arranged, the elevator 42 is set low, and the geared motor 40 drives the sprocket wheel 41 via the chain 43. However, there is also known a technique in which the elevator 42 is moved up and down along a guide chain 44 with which the sprocket wheel 41 meshes.

[0004]

[Problems to be solved by the device]

 However, according to the former drive mechanism, since the motor 31 is oscillated to apply tension to the belt 36, the belt 36 and the pulleys 33 and 35 rotate in an oblique state, which causes abrasion and damage on both sides. However, there is a problem in that Further, according to the latter drive mechanism, when the chain 43 is cut, the sprocket wheel 41 freely rotates, and there is a risk that the lift table 42 may drop.

Therefore, an object of the present invention is to adjust the tension of the cord transmission member without trouble at a position where the lifting table can be installed low, and furthermore, the mechanism can be used to cut the cord transmission member. At times, it is to provide a stair lift that can safely stop the lift.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention relates to a stair elevator that connects a motor and a speed reducer by a cord transmission member to form a drive mechanism, and the drive mechanism raises and lowers a lift along an inclined guide. A brake that brakes the reducer, a tensioner that applies tension to the rope transmission member in a direction intersecting with the tension transmission member, and a safety that operates the tensioner to stop the motor and operate the brake when the rope transmission member is cut. And a switch.

[0007]

[Action]

 According to the stair lift of the present invention, the tensioner applies tension to the rope transmission member from the direction intersecting with the tension transmission member, so that the tension adjustment stroke can be provided in the lateral direction, and the climbing platform can be set low and the rope can be installed. Since the transmission member intersects the motor and the reducer at a right angle, reliability is improved. Also, when the cord transmission member is cut, the tensioner activates the safety switch, which stops the motor and simultaneously activates the brake of the speed reducer. Therefore, with a simple structure in which the tensioner has two functions, the elevator can be stopped safely in an emergency.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 and 2, the stair climber includes a lift 1 and a drive mechanism 2. A motor 3 and a speed reducer 4 are vertically installed inside the machine case 2a of the drive mechanism 2, and a motor 3 and a speed reducer 4 are installed between the toothed pulley 5 of the motor 3 and the toothed pulley 6 of the speed reducer 4 as a line transmission member. The toothed belt 7 is wrapped around. In this embodiment, a worm reducer having a large reduction ratio is used as the reducer 4.

A pinion 9 is attached to the output shaft 8 of the speed reducer 4, and a rail 11 as an inclined guide laid along the stairs is provided with a rack 11 that meshes with the pinion 9. Then, the motor 3 drives the speed reducer 4 via the toothed belt 7, and the elevator 1 is moved up and down along the rail 10 through the meshing of the pinion 9 and the rack 11.

The reduction gear 4 is provided with an electromagnetic brake 13 on the opposite side of the input shaft 12 and coaxially. The electromagnetic brake 13 is of a negative actuation type that releases the input shaft 12 when energized and brakes the input shaft 12 when shut off. A tensioner 15 is rotatably supported by a shaft 14 inside the machine case 2a, and a tension roller 16 which applies a tension to the toothed belt 7 from a direction intersecting the toothed belt 7 at a right angle to the lower portion thereof, and a tension roller 16 for tension adjustment. Tension bolts 17 and are provided.

As shown in FIGS. 3 and 4, a spring 18 for urging the tension roller 16 toward the toothed belt 7 side is stretched between the machine case 2 a and the tensioner 15. Further, a safety switch 19 such as a micro switch is installed inside the machine case 2a in the biasing direction of the spring 18, and a contact 20 of the safety switch 19 is arranged to face the tensioner 15. The safety switch 19 is configured to be operated by the tensioner 15 when the toothed belt 7 is cut off to shut off the power supply, stop the motor 3 and operate the electromagnetic brake 13.

In the stair lift configured as described above, when the tension bolt 17 is tightened, the tension roller 16 is pressed against the toothed belt 7 as shown in FIG. Tension is applied. At this time, since the tension roller 16 applies tension to the toothed belt 7 in a direction orthogonal to the tensioned belt 7, the tension adjusting stroke can be provided in the lateral direction to install the lifting table 1 at a low position, and at the same time, the toothed belt 7 It is possible to prevent the trouble by properly inserting the gear between the toothed pulleys 5 and 6.

Then, when an operation switch (not shown) is operated in this state, the electromagnetic brake 13 is opened, the motor 3 is activated, and the lift 1 is moved up and down along the rail 10. When a stop switch (not shown) is operated, the motor 3 stops, and at the same time, the electromagnetic brake 13 operates to stop the lift base 1. In this case, since the worm speed reducer is used as the speed reducer 4 and is braked by the electromagnetic brake 13, in response to the operation of the stop switch, the elevating table 1 is instantaneously stopped without slipping.

When the toothed belt 7 is cut for some reason during the ascending / descending operation, the tensioner 15 is rotated by the urging force of the spring 18 and the safety switch 19 is activated, as shown in FIG. . As a result, the power is cut off and the motor 3 is stopped, and at the same time, the electromagnetic brake 13 is operated, and the lift 1 is immediately stopped. Therefore, the tensioner 15 can be safely stopped in an emergency with a simple structure in which the tensioner 15 has two functions of tension adjustment and switch operation.

Note that the present invention is not limited to the above-described embodiment, and for example, the direction in which tension is applied to the toothed belt by the tension roller does not have to intersect at a right angle, and the speed reducer can be used. It is possible to embody by appropriately changing the shape and configuration of each part without departing from the gist of the present invention, such as connecting with a chain or using a chain roller as an inclination guide.

[0016]

[Effect of device]

 As described above in detail, according to the present invention, a brake that brakes the speed reducer, a tensioner that applies tension to the line transmission member in the cross direction, and a safety that is operated by the tensioner when the line transmission member is cut. Since it is configured with a switch, it is possible to adjust the tension of the cord transmission member without any trouble at a position where the lifting platform can be installed low, and the mechanism is used to raise or lower when the cord transmission member is cut. It has an excellent effect that the platform can be stopped safely.

[Brief description of drawings]

FIG. 1 is a front view of a stair lift according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a drive mechanism of the stair lift of FIG.

FIG. 3 is a detailed view of the drive mechanism of FIG.

FIG. 4 is an explanatory diagram illustrating an operation of the drive mechanism in FIG.

FIG. 5 is a schematic view showing a drive mechanism of a conventional stair lift.

FIG. 6 is a schematic view showing another conventional drive mechanism.

[Explanation of symbols]

1 ... Elevating platform 2. Drive mechanism 3. Motor 4.
Speed reducer, 5, 6 ... Toothed pulley, 7 ... Toothed belt, 9
..Pinions, 10 .., rails, 11 .., racks, 13
..Electromagnetic brakes, 15 ... Tensioners, 16 ... Tension rollers, 17 ... Tension bolts, 18 ...
Spring, 19 ... Safety switch.

Claims (1)

[Scope of utility model registration request] 1. In a stair climber in which a motor and a reducer are connected by a cord transmission member to form a drive mechanism, and the drive mechanism raises and lowers an elevator along an inclined guide, a brake for braking the reducer and a rope. A staircase characterized by being provided with a tensioner for applying tension to the line transmission member in a direction intersecting with the line transmission member, and a safety switch which is actuated by the tensioner when the line transmission member is cut to stop the motor and operate the brake. Elevator.