JPH061171A - Automatic rotation device for rotary seat for vehicle - Google Patents

Abstract

PURPOSE:To obtain an output easily change to an output suitable each action from a single motor by disposing follower bodies at two prime bodies rotated by the single motor simultaneously through clutches respectively, and interlocking a transmission wheel of one follower body with a counter wheel of a rotary base frame, and the other follower body with a stopper operation member. CONSTITUTION:A motor 15 is rotated, a solenoid 39 is energized, and a gear 24 and a boss 35 are connected to each other through a pin 28 and a pin hole 34 to rotate a cam 41. A pedal 9 is operated through wire to release lock to a base frame 2 and let a seat back 4 stand, and the solenoid 39 once becomes off to keep a stopper pin removed from a cut. A solenoid 31 is then energized, a rotating gear 23 is connected through the pin 28 and the pin hole 34 to rotate the base frame 2. The solenoid 39 is then energized to rotate a cam 41, the solenoid 39 becomes off when the lowest lift position gets in contact with a lever 42, and the stopper pin is protruded into the cut at a rotation completing position of the base frame 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic rotating device which is installed mainly in a railway passenger car and is not capable of changing direction, and more particularly to an electric automatic rotating device which can change direction by remote control.

[0002]

2. Description of the Related Art An electric automatic rotating device for a vehicle wheelchair is known, for example, from Japanese Utility Model Laid-Open No. 61-155232. In this known automatic rotating device, a motor with a reduction gear is attached to the side of a rotating frame of a chair, and a sprocket integral with the shaft of the motor is meshed with a large gear fixed to the upper surface of a leg stand to rotate the sprocket by the motor. It is a structure that changes the direction of the chair rotating on the orbit. Further, a rotation stopper releasing solenoid which is interlocked with the turning on of the motor start switch or which is operated by another switch is provided. That is, when the remote control switch is closed when changing the direction of the chair, the solenoid works to disengage the stopper and the sprocket rotates to rotate the underframe.

[0003]

Generally, a wheelchair for a vehicle is provided with at least a reclining device as the vehicle becomes more sophisticated, and some of them further include footrests, a back table and the like. If each of the above devices is attached to the swivel chair,
Before automatically rotating the chair, it is necessary to return the backrest, leg rests and back table to a position that does not hinder the rotation.If this returning operation is done manually for each chair, the rotation of the chair is automated. There is no effect.

Therefore, there is one in which the rotation stopper for the underframe is released, the backrest is raised, and other necessary operations are performed by different motors from the underframe rotation motor, but basically one operation is performed. Because each uses one motor with reduction gear, the weight per one chair increases,
As a result, the weight of the vehicle is increased, and the specifications of individual motors must be changed according to their functions, resulting in high manufacturing costs and complicated maintenance.

The present invention has been proposed in view of the above-mentioned conventional problems in the electric automatic rotating device for a wheelchair for a vehicle, and the rotation stopper required from one motor to rotate the chair and prior to the rotation. The purpose is to release the output for lifting the backrest, raising the backrest, storing the back table, causing the footrest, etc., and to obtain an output that can be easily converted into an output suitable for each operation. And

[0006]

In order to achieve the above object, an automatic rotating apparatus for a vehicle wheel chair according to the present invention has at least two motors which are simultaneously rotated by one motor mounted on a footrest.
There are individual prime movers, and the followers that can transmit rotational power through the clutch are arranged corresponding to each prime mover, and the follower integrated with one follower is integrated with the rotating frame of the wheelchair. The other driven body is interlocked with the driven vehicle, and the other driven body is interlocked with a stopper operating member for the rotary underframe, so that the plurality of driven bodies operate in such a manner as to be in mutual contact with each other. Further, it is characterized in that the above-mentioned mechanism, which is a combination of a motor, a driving body, a clutch, a driven body, and the like, is unitized and mounted on the upper part of the leg stand.

[0007]

When the automatic rotation start switch is closed, the rotation of the motor rotates all of the driving bodies, and at the same time, the clutch of the driven body linked to the stopper is connected to the corresponding driving body and the driven body also rotates. With the rotation output, the stopper operation member operates in the same manner as when the pedal is operated, and the stopper is released. Then, the clutch of the driven body with the driven wheel that is linked to the driven vehicle integrated with the rotating underframe is connected to the corresponding driving body to rotate the driven body, and the rotation of the driven body is interlocked with each other. When it reaches the underframe rotation end position, the stopper works and the clutch is disengaged at the same time, and the motor is not energized, and the automatic rotation operation ends.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an automatic rotating apparatus for a wheelchair for a vehicle according to the present invention will be described with reference to the drawings. FIG. 8 is a perspective view of a wheelchair for a two-seater vehicle provided with the device of the present invention as seen from the front side, and FIG. 9 is a perspective view as seen from the back side, on a pedestal 1 fixed to the floor of the vehicle. An underframe 2 is rotatably attached with a vertical axis 3 arranged in the center thereof. And the backrest 4 on the underframe 2
-The armrest 5 is attached and the seat cushion 6 is placed and fixed. The backrest 4 can be erected by a reclining device incorporated in the armrest 5. Further, a table 7 and a footrest 8 for persons in the rear seats are foldably attached to the back of the chair.

The pedal 9 is retracted by depressing the pedal 9 provided on the side surface of the footrest 1 on the side of the passage, but as shown in FIG.
The stopper pin 12 is provided to stop the rotation of the rotary underframe 2 by engaging with a hole or notch 11 which is projected by the extension action of the spring 10 and is opened in the rotary underframe 2. When the tip of the stopper pin 12 is pulled out from the notch 11 by stepping on the pedal 9, the lock action of the rotary underframe 2 with respect to the leg stand 1 is released, and the underframe 2 can be pushed and rotated by hand. Chair orientation is 180
The pin engaging notch on the opposite side of the underframe 2 arrives in front of the stopper pin 12 at a changed position, and the stopper pin 12 projects into the notch on the opposite side to fix the underframe 2.

Prior to the rotation of the underframe 2, that is, the depression of the pedal 9, if the backrest 4 is tilted, it is completely raised.
If there is the table 7 and the footrest 8 in the use position, these are stored. The standing of the backrest 4 and the storage of the table 7 and the footrest 6 may be performed individually, but by connecting the release operation member of the reclining mechanism and each release operation member of the table / footrest to the pedal 9,
The backrest 4 may be erected and the table 7 and the footrest 8 may be stored in association with the release operation of the stopper pin 12 by the pedal 9.

As shown in detail in FIGS. 1 and 2, one substrate 13A of the base frame 13 in which two substrates 13A and 13B arranged facing each other on the left and right sides are assembled by inserting a space holding pillar 14 between the two plates A geared motor (electric motor with a speed reducer, hereinafter referred to as a motor) 15 is fixed to the outer surface of the substrate at a right angle to the substrate surface so as to keep horizontal. A gear 17 is integrally attached by a key 18 to a motor output shaft 15A which penetrates the substrate 13A and is supported by a bearing 16 on the other substrate 13B. The base frame 13 is, as shown in FIG. 4, a box frame 1 at the center of the footrest 1 at both ends of a board 13A on the motor mounting side.
It is fixed to the side of 9.

A plurality of (three in the figure) shafts 20, 21 and 22 parallel to the motor output shaft 15A are respectively bearings 1.
6 are supported by the base plates 13A and 13B via 6 so as to be able to advance and retreat in the axial direction along with the rotation, and their shafts 20, 21 and 22 are supported.
Further, gears 23, 24, 25, which are kept in mesh with the gear 17 on the motor output shaft 15A, are supported.
That is, the above-mentioned gears 23, 24, 25 are prime movers that rotate simultaneously when the motor 15 rotates.

A gear 23 on the first shaft 20 is fixed to the shaft 20 by a key 26, and this gear 23 is used for the motor output shaft 1
It directly meshes with the gear 17 on 5A. On the other hand, the first axis 2
The boss 27 is loosely fitted to the gear 23 at a constant distance and is supported so as not to move in the axial direction.
A plurality of pins 28 project at eccentric positions on the surface of the boss 27 facing the gear 23, and a sprocket 29 is integrally provided on the outer peripheral surface of the boss 27. The sprocket 29 meshes with a disc gear 30 (which forms a row of small holes along which the teeth of the sprocket engage with each other) fixed to the vertical axis 3 of rotation of the underframe 2.

The end of the first shaft 20 on the boss side is the substrate 13.
Solenoid 3 mounted on the outer surface of A in parallel with the motor 15
It is connected to one core 31A. Further, the end of the first shaft 20 on the gear side projects outside the substrate 13B on the opposite side, and a return spring 32 is provided around the projecting end of the shaft 20. The return spring 32 is contracted between a washer 33 fixed to the end surface of the shaft 20 and the bearing 16.

When the solenoid 31 is energized, the gear 31 integrated with the shaft 20 is pulled toward the boss side while compressing and biasing the return spring 32 by retracting the core 31A, and the pin hole 34 opened in the gear 23 forms the pin hole of the boss 27. When the pin 28 and the hole 34 are fitted to each other and the pin 28 is fitted, the rotation of the gear 23 is changed to the boss 2
7 or sprocket 29. The pin hole 34
The gear 23 with a pin and the boss 27 with a pin 28 constitute a take-out clutch, and the gear 23 with a pin hole 34 serves as a prime mover and a pin 2
The boss 27 with 8 acts as a follower. Solenoid 31
When the power supply to the gear 23 is cut off, the force of the return spring 32 causes the gear 23
The clutch engagement of the boss 27 is released, and the transmission of torque to the sprocket 29 is cut off.

Each gear 2 on the second shaft 21 and the third shaft 22
4 and 25 are loosely fitted together and their gears 24 and 25
The bosses 35 and 36, which are arranged at regular intervals, are fixed to the shafts 21 and 22 with the keys 37 and 38. As in the case of the gear 23 and the boss 27 on the first shaft 20, the bosses 35 and 36 are provided with the clutch pin 28 and the gear 24.2.
5 is provided with a pin hole 34 for receiving the clutch pin 28. The second shaft 21 and the third shaft 22 are connected to respective cores 39A and 40A of solenoids 39 and 40 mounted on the outer surface of the substrate 13B on the side opposite to the motor mounting side,
At the ends of the shafts 21 and 22 opposite to the solenoids, return springs 32 are provided in the same manner as the first shaft 20.

In the case of the second shaft 21 and the third shaft 22, when the solenoids 39 and 40 are energized, the cores 39A and 40A are retracted so that the bosses 35 and 36 integral with the shafts 21 and 22 respectively compress the return spring 32. While being pulled toward the gear side, the boss 35 is inserted into the pin hole 34 opened in the gear 24/25.
・ The pins 28 of 36 correspond to the corresponding pins 28.
When the holes 34 are fitted together, the rotations of the gears 24 and 25 are transmitted to the second shaft 21 and the third shaft 22, respectively. When the energization of the solenoids 39 and 40 is cut off, the clutches of the gear 24 and the boss 35 and the gear 25 and the boss 36 are disengaged by the force of the return spring 32, and the transmission of the rotational torque to the shafts 21 and 22 is cut off.

As shown in FIGS. 1 and 5, a cam 41 is fixed to the outside of the return spring 32 at the end of the second shaft 21 on the side opposite to the solenoid. The lever 42, which is mounted so as to swing in a plane parallel to the plane, is in contact with the lever 42 so as to act in the direction of pushing it up. That is, the rotation output of the cam 41 is converted into a pulling motion in one direction.

As shown in FIGS. 5 and 6A and FIG. 7, the minimum lift portion 41A of the cam 41 is the lever 42 in the normal state.
Is in contact with the lower surface of the roller via rollers 42A, and the inner end of the Bowden wire 43 is connected to the free end of the lever 42.
A is connected. The opposite end of the Bowden wire 43 is connected to the arm of the pedal 9 as shown in FIG. Further, the release operation member 45 of the reclining mechanism 44
The end of the interlocking wire 47, which is separately connected to the manual wire 46, is connected to the arm of the pedal 9 in common with the wire 43, as shown in FIG. Reference numeral 48 is a push button for reclining manual operation.

The third shaft 22 has a cam 4 like the second shaft 21.
Although it is idle without the lever 42 corresponding to 1 and the cam, a lever corresponding to the cam and the cam can be provided to wire with other necessary operation parts such as a table and a footrest. Further, it is also possible to add fourth and fifth shafts to the base frame 13 to which gears and bosses that connect and disconnect with each other by a clutch mechanism are installed, and to take out rotational torque from each shaft for use.

The automatic rotation device of the illustrated example has a base frame 1 thereof.
3 is arranged horizontally so as to extend between the horizontal girders 1A and 1B before and after the pedestal 1, and a pair of front and rear sheathed heaters are attached along the inside of each of the horizontal girders 1A and 1B.
Further, in the case of an eccentric rotation type chair whose rotation center axis moves in a direction parallel to the cross beam when the underframe 2 rotates, the base frame 1
It is advisable to make 3 vertically long and to arrange it in the central portion between the front and rear cross girders 1A and 1B. There is no space for placing the base frame 13 near the rotation center axis 3 of the underframe 2 in the chair in which the hanging heater is assembled along the ceiling surface of the base 1, so that the base frame should be placed away from the hanging heater. It is possible to transmit the rotational torque to the underframe by mounting it on a foot stand and by wrapping a chain around the output gear on the base frame side and the driven gear on the underframe side.

The automatic rotation device of the present invention operates by, for example, sequence control. When the automatic rotation start switch is closed, the motor 15 rotates and all the gears 23, 24 are rotated.
At the same time that 25 rotates, the underframe rotation unlocking and reclining mechanism standing up operation solenoid 39 is excited, and the gear 24 and the boss 35 are connected via the clutch (pin 28 and pin hole 34) to connect the second shaft 21. That is, the cam 41 starts to rotate. As shown in FIGS. 6A to 6B, when the cam 41 rotates to the maximum lift position and the wire pull amount of the lever 42 becomes maximum, the pedal 9 is operated via the wire 43 in the same manner as when operated by the foot. As a result, the lock for the underframe 2 is released and the backrest 4 stands up. At this point, the solenoid 39 is once turned off by the action of a sensor such as a limit switch, and the wire 43 is kept in a pulled state by the maximum amount. That is, the state in which the stopper pin 12 is pulled out from the notch 11 is maintained.

Next, the solenoid 31 for rotating the underframe is excited, and the rotating gear 23 turns the boss 2 with the sprocket.
7 and a clutch (pin 28 and pin hole 34), and rotation of the sprocket-equipped boss 27 causes the disc gear 3 to rotate.
It is transmitted to 0 and underframe 2 turns. Immediately after the rotation of the underframe 2 is started, the solenoid 39 is excited again, the cam 41 starts to rotate, and the solenoid 39 is cut off when the lowest lift position comes into contact with the lever 42. When the notch on the opposite side and the stopper pin 12 match at the rotation end position of the underframe 2, the stopper pin rushes into the notch, and at the same time, the solenoid 31 for underframe rotation is turned off and the motor 15 is turned off. The automatic rotation operation ends.

[0024]

As described above, the automatic rotating device for the vehicle wheelchair according to the present invention is provided with at least two prime movers which are simultaneously rotated by one motor mounted on the footrest, and each of which is provided with a clutch. A driven body capable of transmitting rotational power is arranged corresponding to each driving body, and a transmission wheel integrally provided on one driven body is interlocked with a driven vehicle integrated with a rotating frame of a chair, and another one is Since the driven body is interlocked with the stopper operating member for the rotary frame and the plurality of driven bodies are operated in such a manner as to be in opposition to each other, a plurality of operating systems required for automatic rotation of the chair by one motor are provided. On the other hand, the operation power can be transmitted in a timely manner.

Since the basic output branched and transmitted to each operation system is rotational power, and since it is also possible to sequentially increase the number of sets of the prime mover and the follower, the rotary output can be directly rotated. It can be transmitted as motion, and can be easily and freely converted and transmitted to reciprocating linear motion and other motions, and can be applied to chairs with different motions of the operation part for automatic rotation and chairs with different numbers of operation systems. There are advantages.

By using one motor as a prime mover, the weight of the entire chair as well as the mechanical portion is reduced as compared with the case where a motor is provided for each operation system, and there is an effect of cost reduction. Also, if there is only one motor as a prime mover,
The electric wiring system and the sequence control system are simplified compared to the case where one motor is used for the operation system, and the design is easy.

Further, since the automatic rotation device of the present invention has a simple structure and is easy to put together, it can be unitized and installed on the upper part of the foot stand, and a wide leg space can be secured under the foot stand. The effect is that you can get a chair that is comfortable to sit in. In particular, when a heater is attached to the ceiling of the footrest, there is an advantage that the automatic rotation device unit can be installed without being affected by the heater.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view of an automatic rotation device of the present invention.

FIG. 2 is a side view showing the automatic rotation device of the present invention with one substrate removed.

FIG. 3 is a partial vertical sectional front view of a main part of a chair for assembling the automatic rotation device of the present invention.

FIG. 4 is a plan view of a central portion of a chair to which the automatic rotation device of the present invention is attached.

FIG. 5 is a partially cut side view of a chair to which the automatic rotation device of the present invention is attached.

FIG. 6 is a front view for explaining the operation of the wire operation cam in the automatic rotation device of the present invention.

FIG. 7 is a side view showing a mounted state of the wire operation cam and the lever.

FIG. 8 is a perspective view of a vehicle wheelchair to which the automatic rotation device of the present invention is applied.

FIG. 9 is a perspective view of the chair as seen from the back side.

[Explanation of symbols]

 1 Leg base 2 Base frame 3 Vertical axis (rotation center axis) 9 Pedal 12 Stopper pin 13 Base frame 15 Motor (motor with reduction gear) 17 Gears fixed to the motor shaft 20, 21, 22 Shafts 23, 24, 25 Driving body (Gear) 27, 35, 36 Driven body (boss) 28 Clutch pin 29 Transmission vehicle (sprocket) 30 Driven vehicle (disk gear) 31, 39, 40 Solenoid 34 Pin hole 41 Cam 42 Lever 43, 46, 47 Wire 44 Reclining mechanism

Claims (2)

[Claims] 1. There are at least two driving bodies that are simultaneously rotated by one motor mounted on a footrest, and a driven body to which rotational power is transmitted via a clutch is arranged corresponding to each driving body. , A driven wheel integrally provided on one driven body interlocks with a driven wheel integrated with a rotating frame of the chair, and another one driven body interlocks with a stopper operating member for the rotating frame, An automatic rotating device for a wheelchair for a vehicle, characterized in that the followers are arranged so as to operate with a space between them. 2. An automatic rotation of a rotary chair for a vehicle, characterized in that the mechanism comprising a combination of the motor, the prime mover, the clutch, and the follower according to claim 1 is unitized and attached to the upper part of the leg stand. apparatus.