JP3138742U - Wheelchair safety device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a wheelchair from easily moving even when a user unconsciously stands up from a seat surface of the wheelchair.
SOLUTION: A seating band that is stretched over a seat surface of a wheelchair; a piston rod that is attached to at least one of left and right end portions of the seating band and abuts on a wheel of the wheelchair to bear a braking action; A rod holder that holds the piston rod in a state where it can be projected and retracted in the width direction of the wheelchair, and a biasing means that is accommodated in the rod holder and biases the piston rod in the protruding direction. By seating, the seating band is urged, and the piston rod is retracted into the rod holder against the urging force of the urging means to release the brake action, while the wheelchair user stands. The urging of the seating band is released, and the piston rod protrudes by the urging force of the urging means to exert a braking action. What is configured to be.
[Selection] Figure 4

Description

  The present invention relates to a wheelchair safety device, and in particular, it has been devised to prevent the wheelchair user from inadvertently moving even if the wheelchair user forgets to operate the safety brake device and stands up unconsciously. About things.

Self-propelled wheelchairs are widely used because they are lightweight, compact and easy to carry. However, because of its light weight, it can easily move due to slight inclination of the ground or floor and a slight impact. Therefore, many of such wheelchairs are provided with a safety brake device, and by operating the safety brake device, the rotation of the wheel is locked to prevent the wheelchair from being moved carelessly.
For example, Patent Literature 1 discloses such a brake device.
JP 2006-289005 A

However, there are cases where the user forgets to operate the safety brake device and unconsciously stands up from the wheelchair, and in such a case, a part of the user's body is caused by the impact of the user standing up or when standing up. When the wheelchair is touched, the wheelchair may be moved rearward, for example, against the user's intention.
When a user who does not know that the wheelchair has moved tries to sit down on the wheelchair again at that position, there is an accident such as a fall because the wheelchair is not in the original position. In particular, this is a serious problem in using a wheelchair for a user who does not have freedom of body such as cerebral infarction.

  The present invention has been made on the basis of these points, and the purpose of the invention is that even if the user forgets to operate the safety brake device and stands up unconsciously, the wheelchair does not move easily due to a small impact. It is to provide a wheelchair safety device.

In order to achieve the above object, a wheelchair safety device according to claim 1 of the present invention is attached to at least one of a seating band spanned on a seating seat of a wheelchair and left and right ends of the seating band. A piston rod that bears the braking action by abutting the wheel, a rod holder that holds the piston rod in a state where it can protrude and retract in the width direction of the wheelchair, and a piston rod that is accommodated in the rod holder and attaches the piston rod in the protruding direction An urging means for urging, and when the wheelchair user is seated, the seating band is urged and the piston rod is retracted into the rod holder against the urging force of the urging means. On the other hand, when the wheelchair user stands, the urging force to the seating band is released and the piston rod is It is characterized in that the braking action projects by the urging force of the energizing means are configured to be exhibited.
A wheelchair safety device according to a second aspect is the wheelchair safety device according to the first aspect, wherein the seating band is configured to be adjustable in length.
The wheelchair safety device according to claim 3 is the wheelchair safety device according to claim 1 or 2, wherein the rod holder is provided with an attachment that can be attached using a wheelchair frame. It is characterized by being.
A wheelchair safety device according to claim 4 is the wheelchair safety device according to claim 1 or 2, wherein the rod holder is provided with respect to a wheelchair frame. .
A wheelchair safety device according to claim 5 is the wheelchair safety device according to any one of claims 1 to 4, wherein the biasing means is provided between the piston rod and the rod holder. It is a compression coil spring.
A wheelchair safety device according to claim 6 is the wheelchair safety device according to any one of claims 1 to 5, wherein the piston rod is provided with an engagement pin, and the rod holder is provided with the engagement pin. An engagement groove for holding the retracted posture of the piston rod by engaging with the engagement pin is provided.
According to a seventh aspect of the present invention, a safety device for a wheelchair includes a piston rod that bears a brake action by contacting a wheel of a wheelchair, a solenoid mechanism that operates the piston rod, and a load sensor that is installed on a seat surface seat of the wheelchair. The load sensor detects that the wheelchair user is seated, and moves the piston rod via the solenoid mechanism based on the detection signal to release the brake action, while the wheelchair user stands. This is detected by the load sensor, and the piston rod is moved via the solenoid mechanism on the basis of the detection signal so as to exert a braking action.

Therefore, according to the safety device for a wheelchair according to the present invention, the seating band spanned on the seat surface seat of the wheelchair and the wheel attached to at least one of the left and right ends of the seating band A piston rod that bears a braking action, a rod holder that holds the piston rod in a state where it can protrude and retract in the width direction of a wheelchair, and a biasing means that is housed in the rod holder and biases the piston rod in a protruding direction; When the wheelchair user is seated, the seating band is urged and the piston rod is retracted into the rod holder against the urging force of the urging means, and the braking action is released. When the wheelchair user stands, the biasing of the seating band is released and the piston rod is biased by the biasing means. Therefore, it is configured so that the brake action can be exerted by protruding, so that even if the user forgets to operate the safety brake device and unconsciously stands up from the wheelchair, the piston rod faces outward as soon as it stands up Since it protrudes and abuts against the wheel of a wheelchair, it is prevented that the wheelchair moves without permission. Therefore, it is possible to prevent the occurrence of a fall accident associated with the movement of the wheelchair.
Moreover, when the length of the said seating band is comprised so that adjustment is possible, it becomes applicable to the wheelchair of various sizes from which the width dimension of a seat surface sheet differs.
In addition, when a mounting attachment that can be attached to the rod holder using a wheelchair frame is provided, a wheelchair safety device can be directly attached to an existing wheelchair, and only the wheelchair safety device is carried around. Therefore, it can be used for various wheelchairs.
Further, when the rod holder is provided on the wheelchair frame, it is not necessary to attach the rod holder to the wheelchair frame, and the wheelchair safety device can be easily mounted on the wheelchair.
Further, when the urging means is constituted by a compression coil spring that is contracted between the piston rod and the rod holder, the structure of the urging means can be simplified and the cost of parts can be reduced. Also, the biasing force can be adjusted by adjusting the spring constant of the compression coil spring.
If the piston rod is provided with an engagement pin, and the rod holder is provided with an engagement groove for retaining the piston rod by engaging the engagement pin, a wheelchair safety device is used. It is possible to lock the movement of the piston rod by releasing the engagement between the engagement pin and the engagement groove when engaging, and engaging the engagement pin with the engagement groove when the wheelchair safety device is not used. become.
The wheelchair user is seated with a piston rod that bears a braking action by contacting the wheel of the wheelchair, a solenoid mechanism that operates the piston rod, and a load sensor that is installed on a seat surface seat of the wheelchair. This is detected by the load sensor, and based on the detection signal, the piston rod is moved via the solenoid mechanism to release the braking action. On the other hand, the fact that the wheelchair user is standing is detected by the load sensor. When the piston rod is moved via the solenoid mechanism based on the detection signal so as to exert a braking action, finer operation control of the piston rod suitable for the user's weight and use form is performed. It becomes possible.

Hereinafter, a first embodiment of the wheelchair safety device 1 according to the present invention will be described with reference to FIGS. 1 to 8.
(1) 1st Embodiment (refer FIGS. 1-8)
FIG. 1 is a perspective view showing a use state at the time of sitting of a wheelchair to which the wheelchair safety device according to the first embodiment of the present invention is applied, and FIG. 2 is a perspective view showing the state at the time of standing up from a sitting posture. FIGS. 3 and 3 are perspective views showing the operating mode of the wheelchair safety device when sitting, and FIG. 4 is a perspective view showing the operating mode of the wheelchair safety device when standing.
FIG. 5 is a perspective view showing the wheelchair safety device according to the first embodiment of the present invention. FIG. 6 is an exploded perspective view showing the left side fitting, piston rod, rod holder and biasing means. 7 is a perspective view showing the state in which the engagement pin and the engagement groove are released, and FIG. 8 is a perspective view showing the state in which the engagement pin is engaged with the engagement groove. It is.

First, the wheelchair 3 to which the wheelchair safety device 1 according to the present embodiment is applied will be briefly described. The wheelchair 3 is a self-propelled wheelchair that travels by turning the hand rim 7 while the user A is sitting on the seat surface 5.
Specifically, as shown in FIGS. 1 and 2, a frame 9 forming a skeleton of the wheelchair 3, a pair of left and right large-diameter wheels 11, 11 provided on the frame 9, and the outside of the wheels 11, 11 A pair of left and right hand rims 7, 7 that rotate integrally with the wheels 11, 11, small-diameter casters 13, 13 provided in front of the wheels 11, 11, and the seat sheet on which the user A sits 5, a pair of left and right legrests 15 and 15 and footrests 17 and 17 that support the user A's foot, a foot support sheet 19 stretched between the left and right legrests 15 and 15, and the back of the user A The back sheet 21 that supports the user, the armrests 23 and 23 that support the elbow of the user A, the hand grips 25 and 25 and the hand brakes 27 and 27 that are operated by the assistant, and the left and right used when parking the wheelchair 3 It is wheelchair 3 by providing a are safety brake apparatus 29 and 29 is constructed.
The wheelchair safety device 1 according to this embodiment is attached using the frame 9 below the armrest 23 of the wheelchair 3.

The wheelchair safety device 1 according to the present embodiment includes a seating band 31 laid over the seat surface sheet 5 of the wheelchair 3, fixtures 33, 33 connected to the left and right ends of the seating band 31, and the attachment Piston rods 35, 35 that are integrally connected to the tools 33, 33, rod holders 37, 37 that hold the piston rods 35, 35 in a state where they can protrude and retract in the width direction W of the wheelchair 3, and the piston rod It is comprised by providing the compression coil springs 39 and 39 as an urging means which gives the tension state to the said seating band 31 by urging | biasing 35 and 35 to the protrusion direction P. As shown in FIG.

As an example, the seating band 31 is formed of a belt-like member made of cloth or chemical fiber having a width of about 20 mm and a length of about 90 cm. Further, both ends of the seating band 31 in the unfolded state are folded back in a loop shape and stitched together, and one of them is directly locked to a locking ring portion 41 of one mounting tool 33 described later. The other end of the seating band 31 is further folded back into a loop through the locking ring portion 41 of the other fixture 33, and the length adjusting buckle passed through the intermediate part of the seating band 31. 43 is locked.
Therefore, the length of the seating band 31 can be adjusted by changing the operating position of the buckle 43.

The fixture 33 is formed, for example, by bending a stainless steel round bar, and one end thereof is the above-described locking ring portion 41 bent in a triangle shape.
Further, the other part of the fixture 33 extends straight, and a male thread part 47 that is screwed into a female thread part 45 engraved on the piston rod 35 described below is engraved at the end part thereof. Yes.

The piston rod 35 is a member that bears a braking action by contacting the tire of the wheel 11 of the wheelchair 3 or the circumferential surface of the wheel. The piston rod 35 is a round bar-shaped member as shown in the figure, and is formed of hard synthetic resin, metal, wood, or the like.
In the center of the base end surface of the piston rod 35, the above-described female screw portion 45 having a predetermined depth is engraved toward the distal end portion 49 of the piston rod 35. Also, the tip 49 of the piston rod 35 is somewhat larger in diameter than the sliding part 51, which is another part.
An engagement pin 53 having a predetermined height is provided in a protruding state in a part of the sliding portion 51 in a direction orthogonal to the width direction of the piston rod 35.

The rod holder 37 is a cylindrical member whose one end surface fitted to the sliding portion 51 of the piston rod 35 is opened and whose other end surface is closed.
The rod holder 37 is formed of a stainless steel material as an example, and a through hole 55 for receiving a shaft portion on which the male screw portion 47 of the fixture 33 is formed is formed at the center of the closed other end surface. .
Further, an engagement groove 57 bent in a hook shape communicating with the one end surface is formed on the peripheral surface on the one end surface side where the rod holder 37 is opened.
The engaging groove 57 is a member that maintains the retracted posture of the piston rod 35 by engaging with the engaging pin 53, and in the protruding direction P or the retracting direction Q of the piston rod 35 together with the engaging pin 53. It has a role as a stopper that regulates the sliding of the.

  The compression coil spring 39 is provided as an example of an urging means for urging the piston rod 35 in the protruding direction P as described above. The compression coil spring 39 is contracted in the rod holder 37 between the base end surface of the piston rod 35 and the end surface of the rod holder 37 in which the through hole 55 is formed.

In this embodiment, a mounting attachment 59 is attached to the rod holder 37. The attachment 59 is attached using the frame 9 of the wheelchair 3. In the present embodiment, as an example, a cylindrical attachment 59 having both ends is opened and made of stainless steel is used.
The attachment attachment 59 is applied from a direction orthogonal to the rod holder 37 as shown in the figure, and is fixed to the rod holder 37 by welding as an example.

Next, the operation mode of the wheelchair safety device 1 configured as described above is such that the user A sits on the seat surface sheet 5 of the wheelchair 3 (1) in the sitting position and the user A sits on the wheelchair 3. (2) Standing up from the face sheet 5 will be described separately.
(1) In the sitting position (see FIGS. 1 and 3)
When the user A sits on the seat surface 5 of the wheelchair 3, the user A sits on the seat band 31 so as to be sandwiched between the seat surface 5 and the seat band 31.
In this state, since the weight of the user A is applied to the seating band 31, as shown in FIG. 3, the middle part of the seating band 31 is bent downward, and both ends of the seating band 31 are pulled inward.

As a result, the fittings 33, 33 locked to the seating band 31 move inward, so that the left and right piston rods 35, 35 connected integrally with the fittings 33, 33 are also compressed coil springs 39, Each moves in the retreat direction Q against the urging force of 39.
Accordingly, since the contact state between the piston rods 35 and 35 and the wheels 11 and 11 is released (release of the brake action), the user A freely moves the wheelchair 3 to a desired place while sitting on the wheelchair 3. It becomes possible to make it.

(2) Standing posture (See Figs. 2 and 4)
When the user A stands up on the seat surface 5 of the wheelchair 3 without operating the safety brake device 29, the weight of the user A on the seating band 31 is lost, so the seating band 31 is pulled outward by the urging force of the compression coil springs 39, 39, and is again in the initial tension state. That is, the left and right piston rods 35 and 35, the mounting brackets 33 and 33, and the seating band 31 are urged and moved outward, and the left and right piston rods 35 and 35 move in the protruding direction P, respectively, to move the wheel 11. , 11.

Therefore, according to the wheelchair safety device 1 according to the first embodiment of the present invention, the piston rods 35 and 35 come into contact with the peripheral surfaces of the wheels 11 and 11 again regardless of the operation of the safety brake device 29. Therefore, the wheels 11 and 11 cannot be rotated by the frictional force with the piston rods 35 and 35, and the wheelchair 3 is prevented from being carelessly moved.
And even if the user A tries to sit on the seat surface seat 5 in this state, the wheelchair A remains in its original position, and the seat surface seat 5 also exists in the original position, so that the user A falls down. Such a problem does not occur.
Further, when the user A leaves the wheelchair 3, the safety brake devices 29 and 29 are operated to completely stop the movement of the wheelchair 3, thereby further enhancing the safety.

(2) Second embodiment (see FIG. 9)
FIG. 9: is a front view which shows the use condition at the time of the standing posture of the safety device for wheelchairs concerning the 2nd Embodiment of this invention. The wheelchair safety device 100 according to the second embodiment of the present invention is the first device of the present invention in that the rod holders 37 and 37 are provided directly to the frame 9 of the wheelchair 3 without providing the attachment attachment 59. This is different from the wheelchair safety device 1 according to the embodiment.
Therefore, since the other configuration is the same as that of the wheelchair safety device 1 according to the first embodiment of the present invention, detailed description thereof is omitted here.

Also, the wheelchair safety device 100 according to the second embodiment of the present invention provides the same operations and effects as the wheelchair safety device 1 according to the first embodiment of the present invention. The wheelchair safety device 100 can be easily attached to the wheelchair 3 by the amount that does not require the attachment attachment 59 to be attached.
Further, since the attachment 59 is not required, the number of parts is reduced, and the part cost can be reduced.

(2) Third embodiment (see FIG. 10)
FIG. 10: is a front view which shows the use condition at the time of the sitting posture of the safety device for wheelchairs concerning the 3rd Embodiment of this invention. A wheelchair safety device 200 according to the third embodiment of the present invention uses a solenoid mechanism 201 as an urging means, and based on a detection signal of a load sensor 203 installed on a seat surface seat 5 of the wheelchair 3, the solenoid mechanism The piston rod 35 attached to the slider 205 of 201 is projected and retracted.
Therefore, in this embodiment, the seating band 31 and the fixture 33 provided in the wheelchair safety device 1 according to the first embodiment of the present invention are not provided. Further, in this embodiment, the rod holder 37 provided in the first embodiment of the present invention is not provided, but the function of the rod holder 37 is performed by the housing 207 of the solenoid mechanism 201.

In this embodiment, the battery 209 that supplies power to the load sensor 203 and the solenoid mechanism 201, the control device 211 that determines the detection load of the load sensor 203 and the operation timing of the solenoid 201, the battery 209, the control device, and the like. 211, a wiring 213 for connecting the solenoid mechanism 201 and the load sensor 203 is provided.
The configuration of the piston rod 35, the mounting position, and the action on the wheel 11 are the same as those in the first embodiment, and a detailed description thereof will be omitted here.

  When the wheelchair safety device 200 according to the third embodiment of the present invention is used, the load sensor 203 is in a sitting posture in which the user A is seated on the seat surface sheet 5 of the wheelchair 3. The weight of the user A is detected, it is confirmed that the user A is seated on the seat sheet 5, the solenoid mechanism 201 is excited, and the slider 205 is resisted against the spring force of a coil spring (not shown). Retreat into housing 207. Along with this, the piston rod 35 attached to the slider 205 also moves in the retreat direction Q and the contact state with the wheel 11 is released, so that the wheelchair 3 is movable.

  On the other hand, when the user A shifts from the above-mentioned sitting posture to the standing posture where the safety brake device 29 is not operated, the load sensor 203 does not detect the weight of the user A, and the user A is in the standing posture. Therefore, the excitation of the solenoid mechanism 201 is released. As a result, the slider 205 is projected out of the housing 207 by a coil spring (not shown). Along with this, the piston rod 35 attached to the slider 205 moves in the protruding direction P and abuts against the peripheral surface of the wheel 11 to prevent the wheelchair 3 from being inadvertently moved.

  The wheelchair safety device 200 according to the third embodiment of the present invention can provide the same functions and effects as those of the wheelchair safety device 1 according to the first embodiment of the present invention. Further, it is possible to control the operation of the piston rod 35 more finely according to the weight and usage pattern of the user A.

The present invention is not limited to the above-described three embodiments.
For example, the contact surface of the piston rod 35 with respect to the wheel 11 may be the end surface of the tip portion 49 in addition to the sliding surface 51 and the peripheral surface of the tip portion 49 of the piston rod 35. Further, the material or shape of the contact portion of the piston rod 35 with respect to the wheel 11 can be changed so as to increase the friction coefficient.
In addition, an air damper or the like can also be adopted as the urging means, and the shape of the mounting attachment 59 may be a flat plate or the like, and the mounting structure for the frame 9 is a clamp type, a screw fixing type, etc. Various mounting structures can be selected.
Moreover, in the case of each said embodiment, although the structure which attached the piston rod 35 etc. to the both ends of the seating band 31 was shown, the structure provided only in either one is also considered.
Further, the installation location and installation state of the seating band 31 and the like are not limited to those illustrated.
In addition, various modifications can be considered for the configuration of each part.

  The present invention relates to a wheelchair safety device, and in particular, it has been devised to prevent the wheelchair user from inadvertently moving even if the wheelchair user forgets to operate the safety brake device and stands up unconsciously. For example, it can be used in the manufacture and use of self-propelled wheelchairs, and is particularly applicable to wheelchairs used by users who are inconvenient and cannot cope with inadvertent movement of wheelchairs.

It is a figure which shows the 1st Embodiment of this invention, and is a perspective view which shows the use condition at the time of the seating which applied the safety device for wheelchairs to the wheelchair. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows 1st Embodiment of this invention, and is a perspective view which shows the use condition at the time of standing which applied the wheelchair safety device to the wheelchair. It is a figure which shows the 1st Embodiment of this invention, and is a perspective view which shows the operation | movement aspect of the safety device for wheelchairs at the time of sitting. It is a figure which shows the 1st Embodiment of this invention, and is a perspective view which shows the operation | movement aspect of the safety device for wheelchairs at the time of standing. It is a figure which shows 1st Embodiment of this invention, and is a perspective view which shows the safety device for wheelchairs. It is a figure which shows the 1st Embodiment of this invention, and is a perspective view which decomposes | disassembles and shows a part of wheelchair safety device. It is a figure which shows the 1st Embodiment of this invention, and is a perspective view which shows the state by which the engagement of an engaging pin and an engaging groove is cancelled | released. It is a figure which shows the 1st Embodiment of this invention, and is a perspective view which shows the state which the engagement pin has engaged with the engagement groove | channel. It is a figure which shows the 2nd Embodiment of this invention, and is a front view which shows the use condition at the time of standing up of the safety device for wheelchairs. It is a figure which shows the 3rd Embodiment of this invention, and is a front view which shows the use condition at the time of seating of the safety device for wheelchairs.

Explanation of symbols

1 Wheelchair Safety Equipment, 3 Wheelchair, 5 Seat Seat, 7 Hand Rim, 9 Frame, 11 Wheel, 13 Caster, 15 Legrest, 17 Footrest, 19 Foot Support Seat, 21 Back Seat, 23 Armrest, 25 Handgrip, 27 Hand brake, 29 safety brake device, 31 seating band,
33 Mounting tool, 35 Piston rod, 37 Rod holder, 39 Compression coil spring, 41 Lock ring part, 43 Buckle, 45 Female thread part, 47 Male thread part,
49 distal end portion, 51 sliding portion, 53 engaging pin, 55 through hole, 57 engaging groove,
59 Mounting attachment, 100 Wheelchair safety device, 200 Wheelchair safety device, 201 Solenoid mechanism, 203 Load sensor, 205 Slider, 207 Housing, 209 Battery, 211 Control device, 213 Wiring, A user, W width direction, P projecting direction, Q leaving direction

Claims (7)

A seating band laid over a wheelchair seat,
A piston rod which is attached to at least one of the left and right ends of the seating band and bears a braking action by contacting the wheel of the wheelchair;
A rod holder for holding the piston rod in a state where it can appear and retract in the width direction of the wheelchair;
Biasing means accommodated in the rod holder and biasing the piston rod in the protruding direction;
When the wheelchair user is seated, the seating band is urged, and the piston rod is retracted into the rod holder against the urging force of the urging means to release the brake action, while the wheelchair user is released. The wheelchair safety device is configured such that the urging of the seating band is released by standing, and the piston rod projects by the urging force of the urging means to exert a braking action. The wheelchair safety device according to claim 1,
The safety device for wheelchairs characterized in that the seating band is configured to be adjustable in length. In the wheelchair safety device according to claim 1 or 2,
A safety device for a wheelchair, wherein the rod holder is provided with an attachment that can be attached using a wheelchair frame. In the wheelchair safety device according to claim 1 or 2,
A safety device for a wheelchair, wherein the rod holder is provided with respect to a frame of the wheelchair. In the wheelchair safety device according to any one of claims 1 to 4,
The wheelchair safety device according to claim 1, wherein the biasing means is a compression coil spring that is contracted between the piston rod and the rod holder. In the wheelchair safety device according to any one of claims 1 to 5,
The piston rod is provided with an engaging pin, and the rod holder is provided with an engaging groove for holding the retracted posture of the piston rod by engaging with the engaging pin. Wheelchair safety device. A piston rod responsible for the braking action by contacting the wheelchair wheel,
A solenoid mechanism for operating the piston rod;
A load sensor installed on a wheelchair seat,
It is detected by the load sensor that the wheelchair user is seated, the piston rod is moved via the solenoid mechanism based on the detection signal to release the brake action, while the wheelchair user is standing A safety device for a wheelchair, which is detected by a load sensor and moves the piston rod via the solenoid mechanism based on the detection signal to exert a braking action.

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