JP5665219B2 - Wheelchair footrest mounting structure - Google Patents

Description

The present invention relates to a footrest mounting structure for a wheelchair.

  In recent years, passengers have been carefully inspected by metal detectors at airports to prevent hijacking and terrorism when using airplanes.

  In this passenger inspection, when a wheelchair user such as a disabled person or an elderly person who is forced to use a wheelchair is inspected, the metal used in the wheelchair reacts with the metal detector and is accurate. There is a problem that inspection cannot be performed.

  In such cases, caregivers such as airport guards are currently handling wheelchair users, taking into account the caregiver's labor and the psychological distress of wheelchair users. In some cases, the adoption of new means to solve these problems is urgent.

  As one means for solving such a situation, wheelchairs using all non-metallic materials that do not use any metallic materials have been developed.

  This wheelchair made of all non-metallic materials uses natural materials such as wood, bamboo, etc. for the frame, such as seats, backrests, armrests, etc. The parts that are difficult to be molded are made of fiber reinforced plastic or the like, and the bearings are manufactured using ceramic ball bearings or the like.

  This wheelchair made of all non-metallic materials is very useful in that it can be accurately inspected by metal detectors at airports without misdetection, and also uses a lot of natural materials. Thus, a warm and ergonomic wheelchair can be obtained.

  However, since there are limited conditions for adopting the constituent materials, there are still many problems to be investigated regarding the strength, durability, and shape of the material subjected to the impact.

By the way, as shown in FIG. 6, the footrest which is one of the important components in a wheelchair generally includes a plastic spacer 3 fitted on a footrest shaft 2 fixed to a front frame 1 of the wheelchair. And a footrest support portion 4 having a cylindrical through-hole, in which a spacer 3 is rotatably inserted into the through-hole, and a footrest body 5 provided integrally or coupled with the footrest support portion 4. In addition, as shown in FIG. 7, it is structured to be flipped up and fixed and stored and held by the frictional force of the footrest support 4 and the spacer 3.

  Further, in order to secure the effect of holding the footrest body 5 by such a frictional force, a spacer 3 as shown in FIG. 8 incorporating a leaf spring 6 to forcibly increase the frictional force, The thing which employ | adopted the stop member as a part of part is proposed (for example, refer patent document 1).

In such a method of holding the footrest during storage by the frictional force of the footrest support part and the spacer, wear of the material due to friction occurs, and the footrest holding effect decreases when used for a long period of time. There is.

  In particular, when this method is used for the above-mentioned wheelchair footrest holding structure made of all non-metallic materials, the non-metallic material is heavily worn, and in the case of incorporating a leaf spring, the leaf spring is metal. This makes it difficult to achieve the intended purpose.

  In order to solve such problems and to ensure the effect of holding the footrest, a structure having a stopper 7 for holding the footrest body 5 on the front frame 1 as shown in FIG. A mechanism for storing the footrest body by lever operation by a mechanism has been proposed (see, for example, Patent Document 2).

  Although these footrest body holding structures have a certain effect on prevention of deterioration of the holding function due to wear of the members, the stopper protrudes from the front frame and becomes obstructive during use, and the footrest body mounting structure There is a problem of complexity.

  In particular, in a wheelchair made of all non-metallic materials, there is a problem in terms of manufacturing, ease of use, etc. in adopting a complicated structure, and the conventional footrest body mounting structure used in ordinary wheelchairs Is hard to adopt as it is.

As another method for holding the footrest body that does not have the above-described structure, there is a method of holding the footrest body 5 and the front frame 1 of the wheelchair while interfering with each other in a state in which the footrest body is flipped up and stored as shown in FIG. .

  In a wheelchair made of all non-metallic materials, the outer diameter of the front frame has to be increased in order to ensure strength, and considering the ease of placing the foot on the footrest body, as shown in FIG. It is necessary to arrange the front frame 1 at a certain angle from the vertical direction with respect to the horizontal footrest shaft 2, and the configuration in which the footrest body is held by interference with the arranged front frame is maintained. If it is adopted, the footrest body interferes with the front frame having a large outer diameter before reaching the position where the footrest body is stabilized by its own weight during storage when the footrest body is flipped up.

  In order to solve this problem, a method can be considered in which the footrest shaft is provided rearwardly with respect to the front frame and the footrest body is disposed behind the front frame. It leaves away from the lowered position, impairing the ease of placing the foot, and a new problem arises that the heel portion floats greatly when the foot is placed.

JP 2001-238918 A Japanese Patent No. 4444110

  The present invention solves the above problems and provides a footrest mounting structure for a wheelchair that can realize utilization in inspections at airports, ease of placing a foot, and stability of holding a footrest body by a simpler mechanism. It is an object to do.

  The footrest mounting structure of the wheelchair of the present invention is characterized by the following.

Footrest mounting structure of the wheelchair of the present invention, a footrest shaft, a spacer fixed thickness which are fitted to the outer peripheral portion of the footrest shaft and the footrest main body for placing the feet, provided at one end of the footrest main body, the front and rear a footrest mounting structure of the wheelchair having a footrest support portion having a through hole in a direction, footrest pair, are symmetrically arranged, a pair of left and right front frame disposed to be inclined forward from both sides of the wheelchair The footrest support part has a through-hole penetrating in the front-rear direction, and a spacer is provided on the outer peripheral surface of the spacer. longitudinally spiral guide groove is formed on, the through-hole of the footrest support inner wall thereof The pin-shaped member inwardly protrudes from, and pin-shaped member is more guided by the guide grooves engaged with the guide groove, a spiral shape of the guide grooves formed in the spacer, right footrest body The spacer of the left footrest body is formed in the right-handed direction toward the front, and the spacer on the left footrest body is formed in the left-handed direction toward the front, and when using the footrest, one end of the footrest body on the footrest support side Comes into contact with the lower end of the front frame from below, the footrest body is held horizontally, and when the footrest is stored , the pin-shaped member is guided by the guide groove and the footrest body rotates around the footrest shaft. And move one end of the footrest body closer to the lower end of the front frame. In contact with the portion of the side, it is held in the accommodated state footrest body stood vertically.

According to the present invention, the position of the footrest body can be moved between the state of using the footrest of the wheelchair and the state of storing the footrest, and the moving direction of the footrest body is set to the position when the footrest is stored. since footrest in use position is configured so as to move to the front frame side of the wheelchair for, in a state at the time when the state and the footrest housing using the footrest relative to the wheelchair front frame canted The footrest body can be brought into contact with and held at an appropriate position.

It is the schematic explaining the inclination state of the front frame with respect to a footrest shaft. It is the schematic of the spacer which formed the guide groove. (A) is the schematic when the angle of a guide groove is formed suddenly, (b) is the schematic when the angle of a guide groove is formed gently. It is the schematic of the footrest of this invention, (a) is the schematic which shows the pin-shaped member provided in the through-hole inner wall part of the footrest support part, (b) attached the footrest support part to the spacer which formed the guide groove. It is the schematic which shows a state. It is the schematic which shows the time of use of the footrest of this invention, (a) is a schematic side view, (b) is a schematic top view. It is the schematic which shows the time of footrest accommodation of this invention. It is a perspective view which shows the footrest structure of a general wheelchair. It is the schematic seen from the front for demonstrating the holding means by the friction with a spacer and a footrest holding | maintenance part. It is the schematic seen from the front for demonstrating the holding means which interposed the leaf | plate spring in the spacer. It is the schematic seen from the front for demonstrating the holding means using a stopper. It is the schematic for demonstrating the holding means by contact | abutting of a front part frame and a footrest main body, (a) is the schematic seen from the front, (b) is the schematic seen from the side.

  Hereinafter, an embodiment of a footrest mounting structure for a wheelchair according to the present invention will be described in detail.

  The drawings for explaining the present invention all show the right footrest for easy understanding of the explanation, but in actuality, it is composed of a pair with the left footrest and is designed symmetrically. .

The footrest mounting structure of the wheelchair of the present invention includes a footrest shaft, a spacer, and a footrest main body for putting a foot on the pair of left and right front frames provided to be inclined forward from both sides of the wheelchair . It is provided at one end of the footrest body, and is constituted by a footrest support portion having a through hole in the front-rear direction.

The footrest body is attached to the outer periphery of a spacer fitted to a footrest shaft attached to the front frame of the wheelchair via a footrest support portion that is rotatably attached. Are provided symmetrically in one set for the left foot (left side) and for the right foot (right side).

  The spacer fitted to the footrest shaft is provided with a spiral guide groove 8 as shown in FIG. 2, and is rotatably attached to the outer periphery thereof as shown in FIG. A pin-like member 9 is provided on the inner wall portion of the through hole of the footrest support portion 4 so as to enter the guide groove 8 with play.

  In the case of the right footrest, the guide groove 8 is formed in a right-handed direction toward the front of the wheelchair, and in the case of the left footrest, the guide groove is formed in a left-handed direction toward the front of the wheelchair. Has been.

  When the footrest is used, as shown in FIG. 4, the contact portion 10 when using the footrest interferes with an appropriate position of the lower end portion of the front frame 1, and is stable in the use position when the footrest is placed on the footrest body 5. When the footrest is stored, as shown in FIG. 5, the footrest storage contact portion 11 interferes with an appropriate position of the front frame 1, and the footrest body 5 is stably held in the storage position. The

  Below, operation | movement of the footrest attachment structure of the wheelchair of this invention is demonstrated.

  As shown in FIG. 4, the state when the footrest is used is a state where the footrest surface of the footrest body 5 is horizontal with respect to the ground, and the contact portion 10 when the footrest is used is an appropriate position of the front frame. It is in a state of interfering with the position.

  The appropriate interference position when using the footrest means a position where the contact portion 10 when using the footrest interferes with a sufficient surface on the inner side surface of the front frame 1, and by using this interference position, any situation Thus, even when the footrest body 5 is placed on the footrest body, a stable state of the footrest body can be maintained.

  Further, as shown in FIG. 5, the footrest storage state is such that the footrest main body 5 has a footrest surface standing in a vertical direction with respect to the ground, and the footrest storage contact portion 11 is in an appropriate position of the front frame 1. It is in a state of interfering with.

  The appropriate interference position at the time of storing the footrest means a position where the footrest body 5 is stably stored and held by its own weight in a state where the inner surface of the front frame 1 interferes with the contact portion 11 at the time of storing the footrest.

According to the footrest mounting structure of the wheelchair of the present invention, in order to change from the state when the footrest is used as shown in FIG. 4 to the state when the footrest is stored as shown in FIG. When the pin-shaped member 9 provided on the inner wall portion of the through hole of the footrest support portion 4 is guided and moved by the guide groove 8 when rotated from the horizontal direction to the vertical direction with respect to the ground, the footrest body 5 Moves forward of the wheelchair according to the rotation.

  Here, the position and shape of the spiral guide groove 8 formed in the spacer 3 are very important for determining the position and moving direction when the footrest body 5 is used with respect to the front frame 1 and when the footrest is stored. Become.

  The formation position of the guide groove 8 is based on the positional relationship with the pin-like member 9 provided on the inner wall portion of the through hole of the footrest support portion 4, and when the footrest is used, that is, as shown in FIG. 10 is set to interfere with the appropriate position of the front frame 1.

  Further, as shown in FIG. 5, the spiral shape of the guide groove 8 is set so that the contact portion 11 when the footrest is stored interferes with an appropriate position of the front frame 1.

  The setting of the interference position at the time of storing the footrest can be adjusted to an appropriate interference position by changing the inclination of the spiral shape of the guide groove 8. That is, as shown in FIG. 2 (a), the moving distance of the footrest body 5 can be shortened by making the spiral shape steep, and conversely, as shown in FIG. 2 (b), the inclination is moderated. By making it, the movement distance of the footrest main body 5 can be lengthened.

  The purpose of the spiral guide groove 8 formed in the spacer is achieved if it is formed by the amount of movement between the position where the fitrest is used and when the footrest is stored. Can be formed with a margin.

  In addition, the guide groove 8 is formed in a spiral shape with a constant pitch so that the movement of the footrest body can be made uniform with respect to the rotation angle of the footrest body. The movement operation can be changed by changing the pitch or by combining a part of a constant pitch and an irregular pitch.

  Further, by forming a hooking portion or the like at an intermediate position of the guide groove 8, the rotation angle of the footrest body can be set to be temporarily maintained.

  The meaning of the spiral shape used in the present invention is that the spiral formed within one round with respect to the cross-sectional circumference of the spacer, for example, a half or a quarter, is formed by extending it. It shall include what becomes spiral shape by this.

  In addition, the pin-shaped member provided on the inner wall of the through hole of the footrest support part may be directly formed on the inner wall of the through hole, but a screw or the like is screwed from the outside of the footrest support part toward the center of the through hole. It is good also as a pin-shaped member.

  Of course, when the footrest mounting structure of the present invention is used for a wheelchair made of all non-metallic materials, all the constituent materials are other than metal. Examples of these include wood, plastic, fiber reinforced plastic, ceramics, hard rubber, and composite materials thereof.

In the above description of the present invention, the description has been made on the assumption that the footrest mounting structure of the wheelchair is made of all non-metallic materials, but the footrest mounting structure of the present invention is not limited to this, for example, a heavy wheelchair user For a strong metal wheelchair or the like intended for the above, it is possible to sufficiently adopt the construction material when a material larger than the usual design is used. In such a case, a metal material can be positively used as a constituent material.

  The footrest mounting structure of the wheelchair is the above-described footrest mounting structure of the present invention, and by using this structure, it is possible to use it for inspections at airports, etc., and to ensure the ease of getting on the foot and the stability of holding the footrest body. Can be realized simultaneously.

DESCRIPTION OF SYMBOLS 1 Front frame 2 Footrest shaft 3 Spacer 4 Footrest support part 5 Footrest main body 6 Leaf spring 7 Stopper 8 Guide groove 9 Pin-shaped member 10 Contact part 11 when using the footrest 11 Contact part when storing the footrest

Claims (1)

And footrest shaft, a spacer fixed thickness which are fitted to the outer peripheral portion of the footrest shaft and the footrest main body for placing the feet, provided at one end of the footrest main body, a footrest support part having a longitudinal direction in the through hole A footrest mounting structure for a wheelchair equipped with
The pair of footrests are arranged symmetrically on the left and right sides, and attached to a pair of left and right front frames that are inclined forward from both sides of the wheelchair via a footrest shaft that is attached to extend forward. It is and,
The footrest support part has a through-hole penetrating in the front-rear direction,
An outer peripheral surface of the spacer, spiral guide groove is formed in the longitudinal direction of the spacer, into the through hole of the footrest support portion protrudes is pin-like member toward the inner side from the inner wall, and the pin-like member is more guided by the guide grooves engaged with the guide grooves,
In the spacer of the right footrest body , the spiral shape of the guide groove formed in the spacer is formed in the right-handed direction toward the front, and in the spacer of the left footrest body , it is formed in the left-handed direction toward the front. And, when using the footrest , one end of the footrest body on the footrest support part side comes into contact with the lower end of the front frame from below, the footrest body is held horizontally, and when the footrest is stored , the pin-shaped member Is guided by the guide groove, the footrest body moves forward along the footrest shaft while rotating around the footrest shaft, and the one end portion of the footrest body is closer to the lower end portion of the front frame. contact of the inner part, yield of the footrest main body stood vertically Footrest mounting structure of the wheelchair, characterized in that it is held in the state.

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