JP2012095810A - Wheelchair fixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheelchair fixing device wherein safety is secured by fixing a wheelchair to a vehicle when the vehicle starts to move even if a fixing operation to fix the wheelchair, carried in the vehicle, to the vehicle is not performed.SOLUTION: A control part 51 is provided with a dangerous state decision part 52 and an avoidance control part 53. The dangerous state decision part 52 decides that it is a dangerous state by wire drawing-out information that a wire from a limit switch 37 is drawn out, wheelchair non-fixing information indicating that the wheelchair is not fixed because the wire drawn out from an operation switch 12 is not wound, and closing information indicating a closing state of a back door from a limit switch 13 for a door. When the dangerous state decision part 52 decides that it is the dangerous state, the dangerous state decision part 52 controls the avoidance control part 53, and the avoidance control part 53 performs drive control of a motor drive circuit 58 to drive a motor 30, and performs control to wind up the wire.

Description

  The present invention relates to a wheelchair fixing device for fixing a wheelchair to a floor of a vehicle so that the wheelchair carried into the vehicle does not move while the vehicle is traveling.

  As a device for carrying a wheelchair into the vehicle from the rear of the vehicle using a lift or the like and fixing the wheelchair in the vehicle compartment, a wire, a drum for winding the wire, and a drive device for rotating the drum are provided. There is a known wheelchair fixing device (for example, Patent Document 1).

JP 2010-82051 A

However, the wheelchair fixing device in Patent Document 1 generally pulls out the wire from the drum, and after the wire tip is attached to the wheelchair, the drive device is actuated to wind the wire so that the wheelchair is immovably fixed by the tension of the wire. Therefore, when the vehicle is started without forgetting to drive the drive device, the vehicle is started in a state where the wheelchair is not fixed.
In this case, when the wheelchair is braked, a force that moves forward due to inertia acts on the wheelchair, so that the wheelchair may move greatly in the vehicle and become in a dangerous state. Even when the drive device is operated, the wheelchair is in a dangerous state at the time of braking, as described above, even when the wire is not pulled out from the drum and attached to the wheelchair.

  The present invention has been provided in view of the above-mentioned problems, and even when a fixing operation for fixing the wheelchair carried into the vehicle to the vehicle is not performed, the wheelchair is attached to the vehicle when the vehicle starts. An object of the present invention is to provide a wheelchair fixing device that is fixed and secures safety.

Therefore, in the wheelchair fixing device of the present invention, the drum 24, the wire 22 that is wound and pulled out with respect to the drum 24, the tip 22 is attached to the wheelchair 10, and the drum 24 is rotated to rotate the A driving device 27 that performs a winding drive, a wire drawing detection unit that detects that the wire 22 has been pulled out of the drum 24, and a wheelchair unfixed state detection that detects that the wheelchair 10 is not being fixed. A wheelchair fixing device comprising means 12, a closed state detecting means 13 for detecting a closed state of the wheelchair loading door 4, an avoidance operating means for avoiding a dangerous state, and a control unit 51,
The control unit 51 includes a dangerous state determination unit 52 and an avoidance control unit 53,
The dangerous state determination unit 52 determines whether the wheelchair 10 is based on the wire pull-out information indicating that the wire 22 detected by the wire pull-out detection unit is pulled out and the wire 22 detected by the wheelchair unfixed state detection unit 12. When the wheelchair unfixed information indicating that the wheelchair is not fixed and the closing information indicating the closed state of the wheelchair loading door 4 detected by the closing state detection means 13 are input, it is determined as a dangerous state, The avoidance control unit 53 is characterized in that the avoidance actuating means is operated by the determination of the dangerous state by the dangerous state determination unit 52.

  (1) According to the wheelchair fixing device of the present invention, the dangerous state determination unit 52 includes wire pull-out information indicating that the wire 22 detected by the wire pull-out detecting means is pulled out, and the wheelchair unfixed state detection. Wheelchair unfixed information indicating that the wheelchair 10 is not fixed by the wire 22 detected by the means 12, and closing information indicating the closed state of the wheelchair loading door 4 detected by the closed state detecting means 13 When the input is made, it is determined as a dangerous state, and the avoidance control unit 53 operates the avoidance operation means according to the determination of the dangerous state by the dangerous state determination unit 52. It is possible to prevent a dangerous state in which the vehicle 1 starts and the wheelchair 10 moves.

  (2) According to the wheelchair fixing device of the present invention, the avoidance operation by the avoidance operation means is a warning or an operation of driving the drive device 27 to drive the winding of the wire 22, so that a warning is generated. The vehicle 1 can prevent the vehicle 1 from starting, and when the vehicle 1 starts, the wheelchair 10 can be moved even when the fixing operation for fixing the wheelchair 10 to the vehicle 1 is not performed. It is automatically fixed to the vehicle 1 to ensure safety.

  (3) According to the wheelchair fixing device of the present invention, the wire pull-out detecting means includes the nipple 41 fixed at a predetermined position of the wire 22 and the movement of the nipple 41 by attaching the wire 22 to the wheelchair 10. By including the limit switch 37 for detecting the above, the wire drawing detection means can be configured at low cost, and an increase in the cost of the wheelchair fixing device can be suppressed.

It is a figure which shows the state which has fixed the wheelchair carried in in the vehicle in embodiment of this invention. It is a figure which shows the arrangement configuration of the wheelchair fixing device in embodiment of this invention. It is a figure which shows the inside of the wheelchair fixing device in embodiment of this invention. It is a figure which shows the drawer state of the hook in embodiment of this invention. It is a figure which shows the accommodation state of the hook in embodiment of this invention. It is a functional block diagram corresponding to the claim in the embodiment of the present invention. It is a block diagram in an embodiment of the invention. It is a flowchart which shows the control action in embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a state in which a wheelchair 10 is carried into a vehicle 1 by a lift and the wheelchair 10 is fixed by a wheelchair fixing device 20, and FIG. 2 shows a wheelchair fixed below the floor 2 of the vehicle 1. The arrangement | positioning state of the apparatus 20 is shown.

  As shown in FIG. 1, this type of vehicle 1 that travels with the wheelchair 10 being carried in and fixed in the vehicle has a structure in which the wheelchair 10 is put in and out by opening and closing a back door 4 that can be opened and closed at the rear of the roof 3. ing. And the wheelchair fixing device 20 is respectively arrange | positioned before and behind the floor 2, The wire 22 which attached the hook 21 to the front-end | tip from the both sides of the wheelchair fixing device 20 pulls out, and the hole 5 drilled in the floor 2 so that winding is possible. Has been derived through.

  After the wheelchair 10 is carried into the vehicle 1, the wires 22 of the front and rear wheelchair fixing devices 20 are pulled out, the hooks 21 are hooked on predetermined positions of the wheelchair 10, and the operation switch provided in the vehicle is operated to wind the wires 22. By taking it, the wheelchair 10 is fixed. And even if the back door 4 is closed and the vehicle 1 is started, the wheelchair 10 can travel safely without moving back and forth on the floor 2.

FIG. 3 shows a plan view of the wheelchair fixing device 20 and shows a state where the cover is removed. In addition, since this kind of wheelchair fixing device 20 itself is a well-known structure, for example, since it describes in detail in the said patent document 1, it demonstrates easily.
The wheelchair fixing device 20 includes a plate-like base 23, left and right drums 24 rotatably disposed on the base 23, wires 22 wound around these drums 24, and these wires 22. The two pulleys 25 that change the direction of the drum, the two intermediate gears 26 provided between the two drums 24, and the drum 24 is rotated in the direction of winding the wire 22 through the intermediate gears 26 and the like. It is comprised by the drive device 27 etc. to drive.

  The driving device 27 includes a motor 30 and a speed reducer. A pinion (not shown) is connected to the output shaft of the speed reducer, and an idle gear 31 is engaged with the pinion. The intermediate gear 26 has a toothless portion having no teeth in a part of the upper half, and the wire 22 can be pulled out by the toothless portion as is well known. The intermediate gear 26 that meshes with the idle gear 31 meshes with the gear of the left drum 24 and the upper intermediate gear 26, and the intermediate gear 26 meshes with the gear of the right drum 24.

When the wheelchair 10 is carried into the vehicle 1, the wire 22 is pulled out from the wheelchair fixing device 20 and the hook 21 at the tip is hooked on the wheelchair 10. Then, the drive device 27 is driven by the operation of the operation switch, and the idle gear 31 is rotationally driven in the clockwise direction.
When the idle gear 31 is driven to rotate clockwise, the left intermediate gear 26 rotates counterclockwise. When the intermediate gear 26 rotates counterclockwise, the left drum 24 rotates clockwise to wind up the left wire 22. At the same time, the upper intermediate gear 26 rotates clockwise, so that the right drum 24 rotates counterclockwise and winds up the right wire 22. This operation is performed simultaneously on the left and right, and the left and right wires 22 are wound up at the same time, whereby the wheelchair 10 is fixed on the floor 2.

  Next, means for detecting the state in which the wire 22, that is, the hook 21 is pulled out (wire drawing detection means) will be described with reference to FIGS. 4 and 5. A pair of support pieces 33 is formed on the upper surface of the base 23, and a lever 35 is rotatably provided between the support pieces 33 by a shaft 34. A spring 36 is interposed between the lever 35 and the base 23, and the lever 35 is biased counterclockwise about the shaft 34 by the pulling force of the spring 36.

  A limit switch 37 is arranged on the left side of the lever 35, and the actuator 40 of the limit switch 37 is pressed against one end of the lever 35 biased counterclockwise. Further, the nipple 41 is attached to the wire 22, and when the wire 22 is wound up, that is, when the hook 21 is stored, the end surface of the nipple 41 is the other end of the lever 35 as shown in FIG. The lever 35 is rotated in the clockwise direction against the spring force of the spring 36. When the lever 35 rotates clockwise, one end side of the lever 35 moves away from the actuator 40 of the limit switch 37 and turns off the limit switch 37.

  As shown in FIG. 4, when the wire 22 is pulled out with the hook 21, the nipple 41 is separated from the contact piece 42 of the lever 35, so that the lever 35 rotates counterclockwise by the pulling force of the spring 36. . As the lever 35 rotates (returns), one end of the lever 35 pushes the actuator 40 of the limit switch 37 to turn on the limit switch 37.

FIG. 6 is a functional block diagram corresponding to the scope of the claims. After pulling the wire 22 into the wheelchair 10 carried into the vehicle 1 and hooking the hook 21, the wheelchair fixing device 20 is driven to wind the wire 22. When the operation is not performed, the control unit 51 that drives the “avoidance operation unit” that automatically winds the wire 22 includes a dangerous state determination unit 52 and an avoidance control unit 53.
The “wire drawing detection means” detects that the wire 22 has been drawn from the drum 24 as described above, and the “wheelchair unfixed state detection means” locks the hook 21 on the wheelchair 10. Thus, it is detected that the fixing operation of the wheelchair 10 is not performed without winding the wire 22. Further, the “closed state detection means” detects a state in which the back door 4 that is a wheelchair entry door is closed.

The dangerous state determination unit 52 of the control unit 51 receives the wire withdrawal information from the wire withdrawal detection unit, the wheelchair unfixed information from the wheelchair unfixed state detection unit, and the closing information from the closed state detection unit. Is done. The danger state determination unit 52 determines that the wheelchair 10 is in a dangerous state when the wheelchair 10 is not fixed by the wire 22 and the back door 4 is closed.
When the dangerous state determination unit 52 determines that the state is a dangerous state, the avoidance control unit 53 is driven to operate the avoidance operation unit. In other words, the wheelchair 10 is fixed by automatically winding the wire 22 to avoid the danger of the wheelchair 10 moving while the vehicle 1 is starting and traveling.

  FIG. 7 is a block diagram concretely showing FIG. 6, and is a block diagram of a portion related to the present invention. The “wire drawing detection means” includes the nipple 41, the lever 35, the limit switch 37, and the like. The “wheelchair unfixed state detection means” includes the operation switch 12 that is a switch for winding the wire 22. Further, it is a door limit switch 13 provided at the rear portion of the vehicle 1 as “closed state detecting means” and detecting opening and closing of the back door 4.

The CPU 50 to which wire drawing information and the like from the limit switch 37 are input is composed of a microcomputer and includes the control unit 51 and the storage unit 56. The control unit 51 controls the wheelchair fixing device 20 according to the procedure of the program, and the storage unit 56 includes a ROM storing the program, the limit switch 37, the operation switch 12, and the door. It is comprised from RAM which memorize | stores the signal data from the limit switch 13 temporarily.
Further, the CPU 50 controls the rotation of the motor 30 via the motor drive circuit 58 in order to receive the signal from the operation switch 12 and wind the wire 22. The “avoidance operation means” shown in FIG. 6 includes the motor drive circuit 58 and the motor 30 shown in FIG.
In the present embodiment, the CPU 50 is used. However, the present invention is not limited to the use of the CPU, and a circuit capable of the same control as that using the CPU, such as control by a relay circuit, is used. It goes without saying that it can be done.

  Next, the control of the present invention will be described with reference to the flowchart shown in FIG. First, after carrying the wheelchair 10 into the vehicle 1, the wire 22 is pulled out and the hook 21 is hooked on the wheelchair 10 (see step S1). After the hook 21 is hooked on the wheelchair 10, the process proceeds to step S <b> 2, and when the assistant operates the operation switch 12 to wind the wire 22, the wheelchair 10 is fixed, so the back door 4 is closed. After that, the vehicle 1 is ready to start (see step S6).

In step S2, if the operation switch 12 is not operated to wind the wire 22, the wire 22 is pulled out, and therefore, as shown in FIG. 4, wire pull-out information that is an ON signal from the limit switch 37, and the operation The wheelchair unfixed information that the wheelchair 10 is not fixed because the switch 12 is not operated is input to the CPU 50.
Next, when the process proceeds from step S2 to step S3 and the back door 4 is closed, closing information indicating that the back door 4 is closed is input to the CPU 50 from the door limit switch 13.

  In step S4, the dangerous state determination unit 52 of the control unit 51 of the CPU 50 does not wind the wire drawing information that the wire 22 is drawn from the limit switch 37 and the wire 22 drawn from the operation switch 12. Based on wheelchair unfixed information indicating that the wheelchair 10 is not fixed and closing information indicating the closed state of the back door 4 from the door limit switch 13, it is determined to be a dangerous state. If the dangerous state determination unit 52 determines that it is in a dangerous state, the process proceeds to step S5, where the dangerous state determination unit 52 controls the avoidance control unit 53, and the avoidance control unit 53 controls the motor drive circuit 58 to control the motor 30. Drive and control to wind up the wire 22 is performed. When the wire 22 is wound, the control unit 51 that detects an overload of the motor 30 locks and stops the motor 30 to fix the wheelchair 10. As a result, the vehicle 1 can start and run (see step S6).

  As described above, in this embodiment, when the wire 22 is not wound up and the wheelchair 10 is in the dangerous state and the dangerous state determination unit 52 determines, the avoidance control unit 53 controls to wind up the wire 22. Thus, it is possible to prevent a dangerous state in which the vehicle 1 starts and the wheelchair 10 moves. That is, by winding the wire 22, the wheelchair 10 is automatically fixed to the vehicle 1 when the vehicle 1 starts, even if the fixing operation for fixing the wheelchair 10 to the vehicle 1 is not performed. Can be secured.

In step S4, if the danger state determination unit 52 determines that the danger is dangerous, a warning may be issued to the assistant that the winding operation of the wire 22 is not performed by emitting sound or light. good. Even if the assistant who has received this warning forgets to wind up the wire 22, the operator can immediately wind up the wire 22 by the warning and fix the wheelchair 10 to ensure safety. Therefore, it is possible to prevent the vehicle 1 from starting before the wheelchair 10 is fixed by a warning.
Moreover, you may make it alert | report a warning with a sound simultaneously with the winding-up operation | movement of the wire 22 when the dangerous state determination part 52 of the control part 51 determines with said dangerous state.

  Here, the wire pull-out detection means includes a nipple 41 fixed at a predetermined position of the wire 22 and a limit switch 37 for detecting movement of the nipple 41 due to the attachment of the wire 22 to the wheelchair 10. As a result, the wire pull-out detection means can be configured at low cost, and an increase in the cost of the wheelchair fixing device can be suppressed.

  In the above description, the signal from the limit switch 37 is used as the wire drawing information, but a method that does not use the limit switch 37 may be used. For example, the drum 24 is provided with a rotation sensor composed of a hall element and a magnet, and the number of pulses output from the rotation sensor is counted to detect whether the hook 21 is housed or pulled out. Thus, it can be used as wire drawing information.

  Further, although the state where the operation switch 12 is operated is used as the wheelchair non-fixed information, information other than the presence / absence of the operation of the operation switch 12 itself may be used. For example, since the motor 30 that operates the operation switch 12 is driven and the drum 24 rotates, a change in motor current, the presence or absence of rotation of the drum 24, and the like are detected and used as wheelchair unfixed information. May be.

1 Vehicle 4 Back door (wheelchair entry door)
10 Wheelchair 12 Operation switch (Wheelchair unfixed state detection means)
13 Door limit switch (closed state detection means)
DESCRIPTION OF SYMBOLS 20 Wheelchair fixing device 21 Hook 22 Wire 24 Drum 27 Drive device 37 Limit switch 41 Nipple 51 Control part 52 Danger state determination part 53 Avoidance control part

Claims (3)

A drum (24);
A wire (22) which is wound and pulled out with respect to the drum (24) and whose tip is attached to the wheelchair (10);
A drive device (27) for rotating the drum (24) to drive the wire (22);
Wire drawing detection means for detecting that the wire (22) is drawn from the drum (24);
A wheelchair unfixed state detecting means (12) for detecting that the wheelchair (10) is not fixed;
Closed state detecting means (13) for detecting the closed state of the wheelchair loading door (4);
Avoidance actuating means to avoid dangerous conditions;
A wheelchair fixing device including a control unit (51),
The control unit (51) includes a dangerous state determination unit (52) and an avoidance control unit (53),
The dangerous state determination unit (52) includes wire pull-out information indicating that the wire (22) detected by the wire pull-out detection unit has been pulled out, and the wheelchair unfixed state detection unit (12). Wheelchair unfixed information indicating that the wheelchair (10) is not fixed by the wire (22), and closing information indicating the closed state of the wheelchair loading door (4) detected by the closed state detecting means (13) Is entered as a dangerous condition when
The avoidance control unit (53) operates the avoidance operation means according to the determination of the dangerous state by the dangerous state determination unit (52).   The wheelchair fixing device according to claim 1, wherein the avoidance operation by the avoidance operation means is an operation for driving the winding of the wire (22) by driving a warning or the driving device (27).   The wire pull-out detection means detects the movement of the nipple (41) fixed to a predetermined position of the wire (22) and the nipple (41) due to the attachment of the wire (22) to the wheelchair (10). The wheelchair fixing device according to claim 1 or 2, further comprising a limit switch (37).

Images