JP2012065745A - Chair with wheels - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such programs that a chair with wheels such as a wheelchair and a baby carrier occupies a very large space and gives large influence to getting on and off and moving in a car of a surrounding passengers, there is a few placing spaces and a few trains where placing spaces are arranged exclusively for the wheelchair or the baby carrier, and it have been very disadvantage to use them, although the chair with wheels is stopped in a vacant space in front of the seat of a train or the space exclusively for the chair with the wheels are used when infants or adults who hardly walk use the chair with wheels in a public transport facility such as the train when going out.SOLUTION: The height of the seat part of the chair with wheels is set in a position higher than the seat of the train and the size and shape of the rear wheels and the frame supporting the same are changed thereby they can be received in the upper and lower spaces of the seat of the train, because the conventional chair with the wheels has a structure in which the height of the seat part has a height equal to the seat of the train or lower and the rear wheels and the frame supporting the same of the chair with the wheels come into contact with the seat of the train.

Description

The present invention relates to a wheeled chair used by infants and adults who have difficulty walking, such as a baby carriage and a wheelchair.

Conventionally, when using public transportation such as trains with wheeled chairs, wheelchairs are stopped in front of railroad seats or in the space next to the doors, or wheelchairs and prams dedicated to seats are removed. I was using it.

Japanese Laid-Open Patent Publication No. 2007-195774 JP 2009-106692 PR JP 2010-99160 PR

When the wheeled chair is stopped in front of the railroad seat, the passage is extremely narrowed by the wheeled chair, which greatly affects getting on and off the surrounding passengers and moving in the vehicle.
For this reason, an increasing number of railcars and the like are provided with wheelchair and baby carriage space by removing seats, but there are still few trains installed.
Even if it is installed, there is only a limited place in the train, so it was difficult to find and move to that place.
In particular, baby carriages were often stopped in front of railroad seats or in spaces beside doors.
The present invention has been made to solve the above problems.

The conventional wheeled chair is installed at a position where the height of the stool is the same as or lower than that of the railway seat stool, and the rear wheel of the wheeled chair and the frame that supports it (hereinafter referred to as the rear wheel). Is called a railway seat and equipment under the seat (hereinafter referred to as a railway seat part).
Therefore, in the present invention, the height of the seat portion of the wheeled chair is set higher than the seat seat portion, and the size and shape of the rear wheel portion are configured not to contact the train seat portion.

With these devices, the seat and the rear wheel of the wheeled chair can be positioned in the space directly above and below the railroad seat, respectively, so that a person sitting on the wheelchair of the present invention sits on the railroad seat. I can take the state.
In addition, this does not occupy a large passage in front of the railroad seat, so that it does not hinder the surrounding passengers getting on and off and moving in the car.

It is the perspective view which showed the fundamental structure and characteristic of this invention. It is the front view which showed embodiment of this invention. Example 1 It is the side view which showed the positional relationship of this invention and a railroad seat. Example 1 It is the front view which showed another embodiment of this invention. Example 1 It is the side view which showed another embodiment of this invention. Example 1 It is the front view which showed embodiment of this invention. (Example 2) It is the side view which showed the positional relationship of this invention and a railroad seat. (Example 2) It is the front view which showed embodiment of this invention. (Example 2) It is the side view which showed the positional relationship of this invention and a railroad seat. (Example 2) It is the front view which showed embodiment of this invention. (Example 3) It is the side view which showed embodiment of this invention. (Example 3) It is the side view which showed the positional relationship with the railroad seat before a rear-wheel part bending | flexion. It is the side view which showed the positional relationship with the railroad seat in the middle of a rear-wheel part bending. It is the side view which showed the positional relationship with the railroad seat after a rear-wheel part bending | flexion. It is the top view which showed the state of the wheel part of a rear-wheel part bending process. It is the top view which showed the state of the wheel part of the rear-wheel part bending process in another embodiment. It is the top view which showed the positional relationship of a seat part back auxiliary wheel and a railroad seat. It is the side view which showed the example of use with the railroad seat which does not require a seat part back auxiliary wheel. It is the side view which showed the state at the time of use of the seat part back auxiliary wheel, and unused. It is the side view which showed one Example of the state folded in the height direction. It is the side view which showed one Example of the state folded in the depth direction. It is the front view which showed one Example of the state folded in the width direction.

Embodiments of the present invention will be described below.
FIG. 1 is a perspective view showing the basic structure and features of the invention of claim 1.
A stool part 20 provided so that the height from the floor surface to the lower end of the stool part is about 40 to 50 cm, a wheel part 10 having a front wheel 11 and a rear wheel 12 having a diameter of about 17 cm or less, and a stool; A frame structure portion 40 (not shown) including a front frame 42 that transmits the weight applied to the seat portion by connecting the portion 20 and the wheel portion 10 to the floor surface via the wheel portion 10 and a seat from the upper end of the rear wheel 12 The wheel chair is characterized in that a space for accommodating the rail seat seat 102 and the rail seat lower device 104 is provided in a range reaching the lower end of the section 20.
Here, the frame structure portion 40 is a general term for a series of parts including a wheel portion frame 41, a front frame 42, a stool portion frame 43, and a backrest portion frame 44.

First, the reason for providing the stool portion 20 so that the height from the floor surface to the lower end of the stool portion is about 40 to 50 cm during use is that the person being assisted sits at a position higher than the height of the rail seat stool portion 102. Because.
The height differs slightly depending on the railway vehicle used, and the rail seat stool 102 from the floor surface is used for JR and private railway company rail seats (hereinafter referred to as the new standard seats) manufactured based on the JR 209 series. The height to the upper surface is about 42 to about 43 cm.
A feature of the new reference seat is that it is not necessary to provide a footrest or the like on the floor for its installation, and is directly attached to the side wall of the vehicle.
Conventionally, equipment such as a heating device installed on the floor under the railroad seat is attached so as to hang under the seat, so that the floor directly under the railroad seat is completely free of obstacles.
In addition, as shown in FIG. 3, in almost all new reference sheets, the space underneath has a structure that the height decreases from the front to the back, and the vicinity from about 10 to about 15 cm from the back is the lowest. There are many things.

On the other hand, the rail seat manufactured before the new standard seat (hereinafter referred to as the old model rail seat) has a height of about 40 cm from the floor surface to the upper surface of the rail seat stool 102. It is about 3 cm lower than 42 to about 43 cm.
Therefore, in order to accommodate more railway seats, it is desirable to adjust the height of the lower end of the stool 20 to the highest height of about 43 cm, taking into account the sinking of the stool 20 and the bending of the frame structure 40 during use. Then, it is safe to keep the height about 3 cm higher in the unused state.

Next, in the frame structure portion 40 for transmitting the weight of the person being assisted to the floor, the front frame 42 in contact with the front surface of the rail seat stool portion 102 needs to be provided only at least forward from the center of the stool portion 20. If possible, it is desirable to be located near the front surface of the stool portion 20.
And in order to realize it, it is necessary to select the material which comprises the frame structure part 40 appropriately, and considering the safety | security and durability, the amount of bending at the time of use shall be less than several mm as a standard. Is desirable.
It has been found that the deflection of several millimeters is surprisingly important.
The bending of the frame structure part 40 not only absorbs vibrations from the floor, but also has an effect of dispersing the weight applied to the stool part.

Furthermore, the reason why the diameter of the rear wheel is about 17 cm or less is that the gap between the floor surface of the new reference sheet and the under-seat device 104 is about 17 to about 20 cm. In order to enter under the sheet without obstruction, the diameter needs to be at least about 17 cm or less.
However, in order to cope with all the new reference seats, it is necessary to further reduce the height of the rear wheel 12 and the wheel portion frame 41.
For example, in the future main vehicle E233 series of JR East, the height from the floor surface to the equipment under the rail seat 104 is about 10 cm, and in order to cope with this, the rear wheel 12 and the wheel portion The height of the frame 41 needs to be about 10 cm or less.
Therefore, the rear wheel 12 may have a diameter of about 9.5 cm or less. However, if the rear wheel is made too small, the stability at the time of running is lowered. For example, a large wheel having a diameter of about 10.5 cm or more is used. However, it is possible to adopt a mechanism in which the rear wheel 12 moves forward or the rear wheel 12 turns to have a height of about 10 cm or less when it comes into contact with the equipment 104 under the railway seat, depending on the railway used. It is also possible to adopt a mechanism that allows the rear wheels to be replaced when necessary.

By adapting the above three points, that is, the height of the lower end of the seat 20, the shape of the frame structure 40, and the diameter (height) of the rear wheel 12 to the new standard seat of the railway vehicle, It can be used in a state where a person being assisted is sitting on a chair, as if the person being assisted is sitting on a railroad seat.
As a result, the wheeled chair of the present invention can be easily used without affecting other passengers getting on and off or moving in the vehicle.
In order to reduce the influence on other passengers, it is desirable to reduce the width of the wheeled chair of the present invention to about 44 cm or less.
The reason is that the seating width per person is about 46 to 48 cm as standard in the latest railcars, so it is necessary to make the width narrower in order not to affect the seating of the next passenger. Because there is.

The wheeled chair of the present embodiment has the appearance and structure shown in FIG. 1 and includes a pair of left and right frame structure portions 40 (not shown), and is provided with a front wheel 11 and a rear wheel 12 having a diameter of about 16 cm. The wheel part 10 is provided at the lower part of both the left and right frame structure parts 40 (not shown).
Here, the frame structure part 40 includes a wheel part frame 41, a front frame 42, a stool part frame 43 covered with the stool member 21, a backrest part frame 44 covered with the backrest member 31, and its attached parts. The generic name of a series of each site is shown.
Further, a stool portion 20 for a caretaker to sit on is provided so that its lower end is positioned at a height of about 45 cm from the floor surface.
By using a member selected so that the sum of the amount of deflection of the frame structure portion 40 due to its body weight and the sinking amount of the stool 20 falls within about 2 cm when the person being assisted is seated, the stool 20 from the floor surface is used. The height to the lower end is set to about 43 cm when used from about 45 cm.
This is the height at which the person being assisted sits slightly on the upper surface of almost all the railway seat stool parts 102 in the state where the person is sitting on the stool part 20 or has a gap of about 3 cm at most.

For the frame structure 40, for example, it is desirable to use a round pipe having an outer diameter of about 16 mm of aluminum alloy A6063 and a wall thickness of about 1 mm or an equivalent square pipe from the relationship between the overall weight, strength, and deflection amount. Of course, materials of other alloys and sizes may be used.
This is because the required standards differ depending on the difference in strength caused by the presence and type of reinforcement structure and the purpose of use such as the age of application and application target, and the optimal one can be selected accordingly. .
Further, the left and right frame structure portions 40 are firmly connected by the left and right connecting rods 45 provided in the vicinity of the rear wheel 12, the vicinity of the front wheel 11, the vicinity of the front and rear of the seat 20 and the hand grip.

The front wheel 11 and the rear wheel 12 each have a diameter of about 16 cm consisting of two wheels, and a footrest 27 for a person being assisted was provided slightly above the left and right front wheels 11.
The stool portion 20 and the backrest portion 30 are made of a plurality of materials including a low resilience material, and are attached so that the stool portion frame 43 and the backrest portion frame 44 are wrapped together with a cloth having a thickness and strength.
Further, the hand grip 46 is made of a slightly hard and cushioning material such as hard urethane, and is attached near both ends of the left and right connecting rods 45.
In addition, seat belts and hoods may be attached.
In FIG. 1 to FIG. 4, the illustration is omitted because it is difficult to understand.

2 and 3 are a front view and a side view of the wheeled chair according to the present embodiment, respectively.
Although the railroad seat 100 is shown in the side view so that the positional relationship can be understood, the stool portion 20 (not shown) covered with the stool member 21 is positioned in a space slightly higher than the railroad seat stool portion 102, and the front frame 42 Is located in the vicinity of the rail seat portion 102, and the rear wheel 12 and the wheel frame 41 do not come into contact with the rail seat lower device 104 and enter the space below it.
Accordingly, the person being assisted can use the train seat 100 as if sitting on the railroad seat 100.

4 and 5 are a front view and a side view showing another embodiment of the invention described in claim 1.
In the present embodiment, a structure mainly intended for adult use is used, and a material suitable for the structure is used.
Specifically, the person's footrest 27 was placed at a height near the axis of the front wheel 11 so as to approach the height from the adult knee to the heel.
In addition, the left and right ends of the stool member 21 are made of a round material, so that a wide support person can be seated without widening the stool portion 20.
This is to reduce the influence on other passengers as described above, and the width of the wheel chair of the present invention is about 44 cm, and the seating width per person is about 46 to about 48 cm. This is because it is necessary to match the latest railway vehicles.
This point is also different from the conventional wheelchair and is one of the merits of the present invention.

Furthermore, by making the material used for the frame structure part 20 stronger, such as an aluminum alloy square pipe A6063 of about 20 mm both vertically and horizontally, it can sufficiently withstand the weight of an adult, and the amount of bending during use can be reduced. It can be accommodated within about 1 cm, and safety and durability can be ensured.
In this embodiment, an extruded square pipe made of a typical aluminum / magnesium / silicon-based aluminum alloy A6063 having good strength and corrosion resistance was selected. However, the present invention is not limited to this.
In view of strength, workability, availability, etc., materials of other alloys and dimensions may be used.

The wheeled chair of the present embodiment has the appearance and structure shown in FIGS.
Although the basic structure and characteristics of the wheeled chair of the first embodiment are almost the same, the object to be assisted is limited to infants and equipped with suitable materials and accessories.
The most characteristic difference from the invention of Example 1 is that the person being assisted by the stool portion of the present embodiment is placed on the knee of the assistant in the railway vehicle.

In order to realize this, the seat frame 43 is made to be about 12 cm higher than the height of the rail seat stool portion 102 and the seat portion 20 is suspended by the seat fishing member 23.
The reason why the height is about 12 cm is that when the assistant sits on the railroad seat, the difference in height between the rail seat stool 102 and the knee or thigh of the assistant is about 12 cm.
As a result, the stool part frame 43 serves as an armrest in a normal state, so that the person being assisted alone can be kept sitting on the railroad seat 100 as in the first embodiment. It has become.

Furthermore, as a merit peculiar to the present embodiment, as shown in FIGS. 8 and 9, since the sitting portion 20 can be brought on the knee of the assistant sitting on the railroad seat 100, the assistant can select the person being assisted. You can take a posture like holding on your lap.
In this connection, the awning hood upper side connecting portion 34 is removed, the awning hood lower side connecting portion 35 is used as a fulcrum, the awning hood 33 is lowered, and the backrest frame 44 is raised to a near vertical position so that the assistant and the person being assisted Since the person's field of view expands and the person can more closely contact each other, the caregiver can further reduce the uncomfortable feeling of holding the person being assisted on the knee.

And, in order to maintain this state stably without the risk of unexpected falls or movements, it is very effective for the assistant to put at least one foot, preferably both feet, on the assistant's footrest 14 provided on the wheeled chair. is there.
Here, when the assistant's heel is in contact with the floor and any part from the base of the toe to the arch is placed on the assistant's footrest 14, it can be easily performed without moving the knee almost up and down. desirable.
For this purpose, an assistant's footrest 14 is provided in the vicinity of the position of the foot when the assistant normally sits on the rail seat stool 102, and the height thereof is less than half the length of the foot, up to about 10 cm. It is desirable to make it.
In the invention of the present embodiment, an assistant footrest 14 having a length of about 8 to about 10 cm corresponding to the assistant's foot width is provided inside the left and right front wheels 11.

Thereby, there is no danger of an unexpected fall and a movement start, and it is possible to keep the position of a wheeled chair stable.
In order to prevent the left and right assisting footrests 14 from becoming an obstacle when folded in the width direction, the left and right positions of the assisting footrests 14 are slightly shifted or the left and right sides can be fitted with a hollow structure or the like. Also good.

The wheeled chair of the present embodiment has the appearance and structure shown in FIGS.
The structure is based on the form of Example 2, and is devised so that it can be applied to almost all railway seats including old railway seats as well as new standard seats.
As shown in FIG. 12, the old railway seat has a rail seat lower device 104 (not shown) installed under the rail seat stool 102 and covered with a rail seat lower cover 105. A feature is that there is no space for the rear wheel 12 and the wheel frame 41 to enter under the seat 102.
Moreover, the height of the upper surface of the railway seat stool portion 102 is about 40 cm in most cases, which is about 3 cm compared with the height of about 42 to about 43 cm of the new standard seat adopted in recent railway vehicles. The level is low.

In the present embodiment, in order to cope with these differences, as shown in FIGS. 11 and 19, the seat portion rear telescopic frame 24, the seat portion rear turning frame 25, and the seat portion rear assist at the front end of the seat portion 20, as shown in FIGS. A ring 26 was provided.
Further, the wheel portion 10 has a structure in which the wheel portion frame 41 can be expanded and contracted or bent, and the rear wheel moves forward as necessary.

Here, a mechanism in which this structure corresponds to the old railway seat will be described.
FIG. 12 is a side view showing a positional relationship with the railroad seat 100 before the rear wheel portion is bent.
In order to correspond to the old type railway seat, the seat portion rear telescopic frame 24 is extended rearward, and the seat portion rear auxiliary wheel 26 functions in place of the rear wheel 12 moving forward.
Further, the seat portion rear turning frame 25 is turned downward so that a step between the seat portion rear auxiliary wheel 26 and the railroad seat seat portion 102 at the tip thereof is not generated.
In this state, the seat portion rear auxiliary wheel 26 comes into contact with the railroad seat stool portion 102 before the rear wheel 12 comes into contact with the rail seat lower cover 105. Functions in place of the rear wheel 12 to prevent the vehicle from falling backward.

FIG. 13 is a side view showing the positional relationship with the railroad seat 100 during the bending of the rear wheel portion.
At this time, with the rear wheel 12 slightly moved forward, the seat portion rear auxiliary wheel 26 reliably acts as a substitute for the rear wheel 12 to prevent the vehicle from falling backward.

FIG. 14 is a side view showing a positional relationship with the railroad seat 100 in a state where the rear wheel portion is completely bent.
In this state, as in the case of the new reference seat, the seat 20 is positioned directly above the rail seat 102.
12 to 14, the auxiliary wheel 13 is provided between the front wheel 11 and the rear wheel 12, but the auxiliary wheel 13 is not necessarily required and may be recognized as necessary depending on the bent shape or structure of the wheel portion 10. Should be provided.

Next, a state in which the entire wheel unit 10 is bent and the rear wheel 12 moves forward will be described.
FIG. 15 shows, from above, a state before the wheel portion 10 is bent, a state in the middle of bending, and a state after bending.
In the present embodiment, the wheel frame 41 is composed of three components, and each component connection portion is bent in the horizontal direction. At the same time, the wheel frame 41 is usually naturally extended by a spring.
Moreover, the wheel part frame 41 is not fully extended even in the extended state, and is slightly bent.
This is to facilitate bending when the rear wheel 12 is pushed forward.
As the rear wheel 12 is pushed forward, the left and right rear wheels 12 gradually approach each other, and the left and right wheel portion frame components 41a closest to the rear wheel are in complete contact.
When the rear wheel 12 is further pushed, the fronts of the left and right wheel part frame components 41a are separated and come into contact only at the rear corners.
As a result, the wheel frame 41 having a length of about 64 cm before bending is shortened to about 28 cm, so that it is possible to deal with an old type railroad seat having the railroad seat lower cover 105.

FIG. 16 is a plan view showing a state of the wheel part in the bending process of the rear wheel part in another embodiment.
In the embodiment shown in FIG. 15, the wheel part frame 41 is composed of three wheel part frame components, and there are two bent parts. In the embodiment of FIG. It consists of elements and has three bent parts.
In this regard, either embodiment may be selected as long as the required function is satisfied. Regardless of this, the wheel frame 41 may be a simple structure such as a telescopic type or a sliding type. .
In the wheeled chair of the present embodiment, the dimensional difference required before and after bending is large, so the telescopic type and the sliding type cannot be adopted, and the embodiment shown in FIGS. 15 and 16 is more preferable. It has become.

FIG. 17 is a plan view showing the positional relationship between the seat rear auxiliary wheel 26 and the railroad seat in the rear wheel bending process.
These correspond to FIGS. 12 to 14 and FIG. 15 or FIG. 16, respectively.
In any case and state, it is obvious that the seat rear auxiliary wheel 26 remains on the rail seat stool 102 and functions in place of the rear wheel 12.

Here, the case where the rail vehicle of a new standard seat is used in the wheeled chair of the present embodiment will be described.
FIG. 18 is a side view showing a use state with a new standard seat that does not require the seat rear auxiliary wheel 26.
At this time, the seat portion rear telescopic frame 24 is slid forward and stored in the seat member frame 22, and the seat portion rear turning frame 25 is turned rearward.
Further, the seat rear auxiliary wheel 26 is positioned slightly above without being in contact with the railroad seat stool 102.

The seat part rear turning frame 25 can be moved not only backward but also downward and forward.
FIG. 19 shows three states of the seat portion rear turning frame 25.
In addition to the state in which the seat portion rearward turning frame 25 is turned downward, the state of turning backward and the state of turning forward are indicated by dotted lines.
Among them, when the seat portion rear turning frame 25 is turned downward, the lower end of the seat portion rear auxiliary wheel 26 becomes lower by about 3 cm than in the other two states. It can be used for both railway seats.

In the present embodiment, as in Example 2, it is possible to place the person being assisted on the knee of the assistant while the assistant is sitting on the railroad seat 100.
In this case, as shown in FIG. 18, the seat part rear telescopic frame 24 is slid forward and stored in the seat member frame 22, and the seat part rear turning frame 25 is used while being turned rearward.
At this time, the seat portion rear auxiliary wheel 26 supports the weight applied rearward not on the railroad seat stool portion 102 but on the assistant's knees and thighs.
For this reason, the seat rear auxiliary wheel 26 is wide like the hand grip 46 so that the knee position of the caregiver can be shifted from side to side.

Finally, the folding mechanism of the present embodiment will be described.
20 and 21 show an example of folding in the front-rear direction, and FIG. 22 shows an example of folding in the width direction.
20 shows a state in which the frame is bent forward between the seat frame 43 and the back frame 44 with the wheel frame 41 bent, and in FIG. 21, the seat frame 43 and the front frame 42 are further bent. The state bent between them is shown.
The state of FIG. 20 is preferable when it is desired to suppress the height, and the state of FIG. 21 is preferable when the dimension in the front-rear direction is desired.

In FIG. 22, the legrest 27 for the person being assisted and the backrest member 31 are bent, while the stool member 21 is not bent, so that the left and right ends of the stool member 21 protrude slightly.
However, it is not always necessary to be concerned with this, and the form can be freely selected.

The present invention can be applied to wheelchairs, baby carriages for infants and the like that do not occupy a large space in a vehicle such as a railway vehicle, and are convenient for both a caregiver and a caregiver and surrounding passengers.

DESCRIPTION OF SYMBOLS 10 Wheel part 11 Front wheel 12 Rear wheel 13 Auxiliary wheel 14 Assistant's footrest 20 Seat part 21 Seat member 22 Seat member frame 23 Seat fishing member 24 Seat part back telescopic frame 25 Seat part back turning frame 26 Seat part back auxiliary wheel 27 Auxiliary footrest 30 Backrest part 31 Backrest member 33 Awning hood 34 Awning hood upper connection part 35 Awning hood lower side connection part 40 Frame part 41 Wheel part frame 41a, 41b, 41c, 41d Wheel part frame component 42 Front frame 43 Seat frame 44 Backrest frame 45 Left and right connecting rod 46 Assistant hand grip 100 Rail seat 102 Rail seat seat 103 Rail seat back 104 Rail seat lower device 105 Rail seat lower cover 106 Rail vehicle floor 107 Rail vehicle inner wall

Claims (3)

A stool provided so that the height from the floor surface to the lower end of the stool is about 40 to about 50 cm when in use, and a wheel part having a height from the floor of at least about 17 cm or less in the vicinity of the rear wheel part; A frame structure part that connects the seat part and the wheel part and transmits the weight applied to the seat part to the floor through the wheel, and the seat of the railway vehicle in the range from the upper end of the rear wheel or wheel part to the lower end of the seat part, A wheeled chair characterized by having a space in which the under-seat equipment can be accommodated. The wheeled chair according to claim 1, wherein the chair has a function of raising the stool and positioning the stool in a space above the knee of an assistant sitting on a seat of a railway vehicle. It has an auxiliary wheel behind the seat and a rear wheel that can move forward, and when the rear wheel is moved forward, the auxiliary wheel functions in place of the rear wheel and supports the load applied to the rear. The wheeled chair according to claim 1 and 2.