WO2020184717A1 - Carrier, and method for using same - Google Patents

Abstract

The problem to be solved by the present invention is to obtain a carrier that can ascend and descend level differences such as stairs, while carrying luggage or a person. This carrier 100 can ascend and descend level differences, and includes: a back frame 110; a seat frame 120 attached to the back frame so as to be pivotable around a lateral axis; an extension frame 130 disposed on a lower section of the seat frame 120; at least one first wheel 10 on a lower section of the back frame 110; at least one second wheel 20 on the lower section of the seat frame 120; and at least one third wheel 30 on a lower section of the extension frame 130.

Description

Carrier and how to use it

The present invention relates to a carrier and its usage, and more particularly to a carrier capable of raising and lowering a step and its usage.

Conventionally, human-powered carriers include trolleys for transporting luggage and wheelchairs for transporting people, but the movement routes of these carriers need to be substantially flat.

Therefore, for example, in facilities such as hospitals and nursing homes, when evacuating a person who has difficulty walking in an emergency, he / she cannot put it on a wheelchair and go down the stairs, and the person who has difficulty walking is carried on his / her back or on a stretcher. The evacuation method of going down the stairs was adopted.

However, with this method, a person who has difficulty walking must be removed from the wheelchair or transferred to a stretcher in front of the stairs, and the person who has difficulty walking cannot be efficiently lowered on the stairs.

Therefore, a device that allows a person who has difficulty walking to go down the stairs while being placed on a wheelchair has also been developed. For example, Patent Document 1 discloses a sitting descent device for stairs evacuation as such a device. ..

JP-A-2007-210525

By the way, the device disclosed in Patent Document 1 includes front wheels, rear wheels, and endless belts wound around front and rear pulleys, and travels on flat surfaces with front wheels and rear wheels, and when descending stairs, the endless belts are used. It is configured to move downward along the slope of the stairs. In this device, the descent speed can be adjusted by the tension of the endless belt so that the caregiver can lower the device carrying a person who has difficulty walking by pushing it with a small force.

Therefore, the device disclosed in Patent Document 1 has a problem that it is possible to carry a person who has difficulty walking and go down the stairs, but not to go up the stairs.

An object of the present invention is to obtain a carrier capable of ascending and descending steps such as stairs without labor while carrying luggage and people, and a method of using the same.

The present invention provides, for example, the following items.
(Item 1)
A carrier that can move up and down steps
With the back frame
A seat frame that can be pivotally attached to the back frame around an axis in the left-right direction,
It has an extension frame provided at the bottom of the seat frame.
The lower part of the back frame has at least one first wheel.
The lower part of the seat frame has at least one second wheel.
A carrier having at least one third wheel at the bottom of the extension frame.
(Item 2)
The first wheel and the third wheel are in contact with each other when moving on a plane, and the first wheel and the second wheel are in contact with each other when moving up and down a step. The carrier according to item 1.
(Item 3)
The carrier according to item 2, wherein the second wheel is used as a fulcrum, and the step can be raised and lowered by moving the first wheel according to the principle of leverage.
(Item 4)
The carrier according to any one of items 1 to 3, wherein the extension frame is pivotally attached to the seat frame around an axis in the left-right direction.
(Item 5)
The carrier according to any one of items 1 to 4, wherein the back frame includes a first grip at the upper part.
(Item 6)
The carrier according to any one of items 1 to 5, wherein a second grip is provided on at least one of the back frame and the seat frame.
(Item 7)
The carrier according to item 6, wherein the second grip has an adjustable length of protrusion in a forward direction or a backward direction.
(Item 8)
The carrier is
The first braking that switches between a braking state in which braking is applied only to the rotation of the first wheel in one of the forward and backward directions and a non-braking state in which braking is not applied to the rotation of the first wheel. Switching means and
A second braking state that switches between a braking state in which braking is applied only in one of the forward and backward rotations of the second wheel and a non-braking state in which braking is not applied to the rotation of the second wheel. The carrier according to any one of items 1 to 7, which is provided with a switching means.
(Item 9)
The first braking switching means is
The first axle that supports the first wheel and
Including the first braking means for braking the first axle,
The second braking switching means is
A second axle that supports the second wheel,
Item 8. The carrier according to item 8, which includes a second braking means for applying a brake to the second axle.
(Item 10)
The first and second braking switching means can rotate the first wheel and the second wheel in the backward direction while the first axle and the second axle are braked, respectively. Item 9. The carrier according to item 9, further comprising a one-way clutch mechanism that prevents rotation in the forward direction.
(Item 11)
The first grip includes an item 8 subordinate to item 5 and an item subordinate to item 8 subordinate to item 5, further comprising a brake lever capable of operating the first braking switching means and the second braking switching means. 9. The carrier according to any one of item 10.
(Item 12)
The second grip includes an item 8 dependent on item 6 and an item 7 dependent on item 6, further comprising a brake lever capable of operating the first braking switching means and the second braking switching means. 8. The carrier according to any one of item 9 or item 10 dependent on item 8 subordinate to item 6, item 9 or item 10 subordinate to item 8 subordinate to item 6, and item 7 subordinate to item 6.
(Item 13)
The carrier according to any one of items 1 to 12, which carries a person or luggage.
(Item 14)
It is a method of using a carrier that can move up and down steps.
The carrier is
With the back frame
Seat frame and
It has an extension frame provided at the bottom of the seat frame.
The lower part of the back frame has at least one first wheel.
The lower part of the seat frame has at least one second wheel.
The lower part of the extension frame has at least one third wheel.
The method is
Switching between the first posture in which the first wheel and the third wheel touch the ground and the second posture in which the first wheel and the second wheel touch the ground
To translate the carrier in the first posture and
By rotating the frame with one of the first wheel and the second wheel as a fulcrum so that the carrier moves up and down the step in the second posture, the other wheel is made of the step. A method that includes raising the wheel or lowering it below the step.
(Item 15)
The carrier is
The first braking that switches between a braking state in which braking is applied only to the rotation of the first wheel in one of the forward and backward directions and a non-braking state in which braking is not applied to the rotation of the first wheel. Switching means and
A second braking state that switches between a braking state in which braking is applied only in one of the forward and backward rotations of the second wheel and a non-braking state in which braking is not applied to the rotation of the second wheel. Equipped with a switching means,
When the step is raised by moving the carrier in the backward direction, the first wheel can be moved only in the backward direction of the forward direction and the backward direction of the carrier. The method according to item 14, wherein the second wheel is brought into the braking state by the first braking switching means and the second braking switching means, respectively.
(Item 16)
A carrier that can move up and down steps
With the back frame
Seat frame and
Have,
The lower part of the back frame has at least one first wheel.
The lower part of the seat frame has at least one second wheel.
The back frame is pivotally attached to the seat frame around an axis in the left-right direction.
A carrier whose distance between the left-right axis and the first wheel is longer than the distance between the left-right axis and the second wheel.
(Item 17)
The ratio of the distance between the left-right axis and the first wheel and the distance between the left-right axis and the second wheel is about 1.2: 1 to about 2.4: 1. The carrier according to 16.
(Item 18)
Item 16. The carrier according to item 16 or item 17, wherein the intersection angle between the back frame and the seat frame on the axis in the left-right direction is about 90 ° ± 5 °.
(Item 19)
The carrier according to any one of items 16 to 18, which is configured so that a step can be raised and lowered by moving the first wheel by using the second wheel as a fulcrum based on the principle of leverage. ..
(Item 20)
The carrier is
The first braking that switches between a braking state in which braking is applied only to the rotation of the first wheel in one of the forward and backward directions and a non-braking state in which braking is not applied to the rotation of the first wheel. Switching means and
A second braking state that switches between a braking state in which braking is applied only in one of the forward and backward rotations of the second wheel and a non-braking state in which braking is not applied to the rotation of the second wheel. The carrier according to any one of items 16 to 19, further comprising a switching means.

According to the present invention, it is possible to obtain a carrier capable of ascending and descending steps such as stairs without labor while carrying luggage and people, and a method of using the same.

FIG. 1 is a perspective view for explaining the carrier 100 according to the first embodiment of the present invention, and shows the appearance of the carrier 100. FIG. 2 is a perspective view showing a part of the carrier 100 shown in FIG. 1 as a perspective view. FIG. 3 is a plan view showing a structure of the carrier 100 shown in FIG. 1 as viewed from the A direction. 4A and 4B are perspective views for explaining the carrier 100 shown in FIG. 1 in detail. FIG. 4A shows a back frame 110, FIG. 4B shows a seat frame 120, and FIG. c) shows the extension frame 130, and FIG. 4D shows a state in which the seat frame 120 and the extension frame 130 are combined. FIG. 4A is a schematic view for explaining the brake lever 116b, and shows the detailed structure of the brake lever 116b (part D in FIG. 1). FIG. 4B is a diagram for explaining how to use the brake lever 116b, and shows a state in which the brake lever 116b is operated so that braking is applied to the first axle (front axle 11) from the state shown in FIG. 4A. There is. FIG. 4C is a diagram for explaining how to use the brake lever 116b, and shows a state in which the brake lever 116b is locked in the state shown in FIG. 4B. 5A and 5B are views for explaining a state in which the carrier 100 shown in FIG. 1 is deformed from the state shown in FIG. 3, FIG. 5A shows a state when ascending and descending, and FIG. 5B is a diagram. Indicates the folded state. FIG. 6 is a plan view showing a procedure for transforming the carrier 100 from the state of horizontal movement to the state of raising and lowering, and FIGS. 6 (a) and 6 (b) show how the extension frame 130 is retracted. And the state where the second wheel 20 touches the ground is shown. FIG. 7 is a plan view showing a procedure for folding the carrier 100, and FIG. 7 (a) shows a state in which the back frame 110 of the carrier 100 shown in FIG. 5 (a) is erected, and FIG. 7 (b) is shown. Shows how the seat frame 120 is rotated so as to overlap the back frame 110. FIG. 8 is a diagram for explaining the lifting principle of the carrier, and FIGS. 8 (a) to 8 (d) show a second wheel 10 (front wheel 10a) of the carrier 100 as a fulcrum. It shows how the wheel 20 (rear wheel 20a for raising and lowering) is moved onto the first step of the stairs St. FIG. 9 is a diagram for explaining the lifting principle of the carrier, and FIGS. 9 (e) to 9 (h) show the second wheel 10 (front wheel 10a) of the carrier 100 as a fulcrum. It shows how the wheel 20 (rear wheel 20a for raising and lowering) is moved onto the second step. FIG. 10 is a diagram for explaining the lifting principle of the carrier 100, and FIGS. 10 (i) to 10 (l) are fulcrums of the second wheel 20 (rear wheel 20a for raising and lowering) of the carrier 100. The first wheel 10 (front wheel 10a) is moved onto the first step. FIG. 11 is a diagram for explaining a state of the horizontally moving carrier 100, and FIGS. 11 (a) and 11 (b) show the first wheel 10 ( front wheels 10a and 10b) and the third wheel. It is a side view and the front view which show the state which 30 (the rear wheels 30a, 30b for horizontal movement) are in contact with the ground. FIG. 12 is a diagram for explaining an operation method of the carrier 100 when two caregivers Cp1 and Cp2 climb the stairs by placing the care recipient Cr on the carrier 100, and FIG. 12A and FIG. FIG. 12B shows how the carrier 100 lifts the first wheel 10 (right front wheel 10a) from the ground contact surface of the stairs with the second wheel 20 (elevating rear wheel 20a) as a fulcrum. FIG. 13 is a diagram for explaining an operation method of the carrier 100 when the care recipient Cr is placed on the carrier 100 and the two caregivers Cp1 and Cp2 climb the stairs, and FIG. 13 (c) and FIG. FIG. 13D shows a state in which the first wheel 10 (front wheel 10a) is pulled up one step above the stairs with the second wheel 20 (rear wheel 20a for raising and lowering) of the carrier 100 as a fulcrum. .. FIG. 14 is a diagram for explaining an operation method of the carrier 100 when the care recipient Cr is placed on the carrier 100 and the two caregivers Cp1 and Cp2 climb the stairs. FIG. 14 (f) shows a state in which the second wheel 20 (rear wheel 20a for raising and lowering) is pulled up one step above the stairs with the first wheel 10 (front wheel 10a) of the carrier 100 as a fulcrum. .. FIG. 15 is a diagram for explaining an operation method of the carrier 100 when the care recipient Cr is placed on the carrier 100 and the two caregivers Cp1 and Cp2 go down the stairs. In FIG. 15B, the carrier 100 is used as a fulcrum with the first wheel 10 (front wheel 10a) as a fulcrum, and the second wheel 20 (elevating rear wheel 20a) is placed one step below a predetermined step of the stairs. Show how to lower it. FIG. 16 is a diagram for explaining an operation method of the carrier 100 when the care recipient Cr is placed on the carrier 100 and the two caregivers Cp1 and Cp2 go down the stairs. FIG. 16D shows a state in which the first wheel 10 (front wheel 10a) is lowered one step below the stairs with the second wheel 20 (rear wheel 20a for raising and lowering) of the carrier 100 as a fulcrum. There is. FIG. 17 is a diagram for explaining an operation method of the carrier 100 when the care recipient Cr is placed on the carrier 100 and the two caregivers Cp1 and Cp2 go down the stairs. FIG. 17F shows a state in which the first wheel 10 (front wheel 10a) is grounded on the step one step below the stairs with the second wheel 20 (rear wheel 20a for raising and lowering) of the carrier 100 as a fulcrum. ing. FIG. 18 is a perspective view for explaining another example of the second grip (U-shaped grip 119) and the carrier 200 using the second grip, and the structure of the U-shaped grip 119 (FIG. 18 (FIG. 18). a)), A state in which the U-shaped grip 119 is projected in the forward direction by the carrier 200 (FIG. 18 (b)), and a state in which the U-shaped grip 119 is projected in the backward direction by the carrier 200. (Fig. 18 (c)) is shown. FIG. 19 is a plan view for explaining a carrier 300, which is a modified example of the carrier 100 shown in FIG. 1, and FIG. 19 (a) shows a state of the carrier when moving in a plane, and FIG. 19 (b) ) Indicates the state of the carrier when ascending and descending.

Hereinafter, the present invention will be described with reference to the accompanying drawings, if necessary, by examples.

In the present specification, "about" means within ± 10% of the number following.

An object of the present invention is to provide a carrier capable of ascending and descending steps such as stairs without labor while carrying the above-mentioned luggage and people.
A carrier that can move up and down steps
With the back frame
Seat frame and
It has an extension frame provided at the bottom of the seat frame.
The lower part of the back frame has at least one first wheel.
The lower part of the seat frame has at least one second wheel.
The above problem is solved by providing a carrier having at least one third wheel in the lower part of the extension frame.

Therefore, the carrier of the present invention has at least one first wheel, at least one second wheel, and at least one third wheel, and has a lower part of the back frame, a lower part of the seat frame, and an extension frame. As long as these wheels are provided at the lower part, the present invention is not particularly limited.

In addition, the method of using the carrier of the present invention is as follows.
It is a method of using a carrier that can move up and down steps.
The carrier is
With the back frame
Seat frame and
It has an extension frame provided at the bottom of the seat frame.
The lower part of the back frame has at least one first wheel.
The lower part of the seat frame has at least one second wheel.
The lower part of the extension frame has at least one third wheel.
The method is
Switching between the first posture in which the first wheel and the third wheel touch the ground and the second posture in which the first wheel and the second wheel touch the ground
To translate the carrier in the first posture and
By rotating the frame with the carrier in the second posture and one of the first wheel and the second wheel as a fulcrum, the other wheel is raised on the step. The above-mentioned problems are solved by providing a method including lowering under the step.

Therefore, in the method of using the carrier of the present invention, by rotating the back frame with one of the first wheel and the second wheel as a fulcrum, the other wheel is raised on the step, or the step is raised. It is not particularly limited as long as it can be lowered.

The number of the first wheel, the second wheel and the third wheel can be arbitrary. By increasing the number of wheels, stable running and ascending / descending are possible. As one preferred embodiment, a pair of the first wheel, the second wheel, and the third wheel are provided on both sides in the left-right direction of each frame, but the present invention is not limited thereto.

In one embodiment, the first wheel and the third wheel are grounded when moving on a plane, and the first wheel and the second wheel are grounded when going up and down a step. In this way, it is possible to put the carrier in an appropriate posture by changing the wheels to be grounded according to the case of moving on a flat surface and the case of moving on a step. However, the present invention is not limited to this. For example, the third wheel may not be provided, and the second wheel may be used for both moving the plane and raising and lowering the step.

Further, when ascending or descending a step, one of the first wheel and the second wheel may be used as a fulcrum. By doing so, the other wheel can be easily lifted by the principle of leverage with a part of the back frame or the seat frame as the emphasis point, which makes it possible to easily raise and lower the carrier without labor. Become.

Further, it is preferable that the extension frame is pivotally attached to the seat frame around the axis in the left-right direction. By doing so, the state of the third wheel provided at the lower part of the extension frame is changed to the state where the second wheel attached to the lower part of the seat frame touches the ground, and the third wheel becomes the third wheel. It is possible to easily switch between the state where the wheels are grounded instead of the two wheels by rotating the extension frame. However, if the wheel to be grounded can be switched between the third wheel and the second wheel, the means for switching the wheel to be grounded can be any means. For example, this means may be a slide mechanism that allows the extension frame to move forward and backward with respect to the seat frame, or may be a detachable mechanism that allows the extension frame to be attached to and detached from the seat frame.

Further, in one embodiment, the seat frame is pivotally attached to the back frame around an axis in the left-right direction. By doing so, the carrier can be compactly folded by rotating the seat frame to a position where both are substantially parallel to the back frame.

Further, in one embodiment, the carrier is in a braking state in which braking is applied only to one of the forward and backward rotations of the first wheel, and no braking is applied to the rotation of the first wheel. A first braking switching means for switching between a non-braking state, a braking state in which braking is applied only to one of the forward and backward rotations of the second wheel, and braking with respect to the rotation of the second wheel. It is provided with a second braking switching means for switching between a non-braking state and a non-braking state. In this case, when climbing a step with the carrier, braking is applied only to the rotation of the wheels in the downward direction, so that the carrier can be safely used while avoiding the movement of the carrier in the direction of falling down the step. You can climb steps. In addition, when the carrier goes down a step, it is possible to move smoothly by making sure that the wheels are not braked.

Further, in one embodiment, the first braking switching means includes a first axle supporting the first wheel and a first braking means for braking the first axle, the second braking. The switching means include a second axle that supports the second wheel and a second braking means that brakes the second axle, and the upper part of the back frame includes a first grip and a first. The grip has a plurality of levers for operating the first braking switching means and the second braking switching means (first and second braking means). In this case, by handling a plurality of levers provided on the first grip to operate the first braking switching means and the second braking switching means (first and second braking means), the first axle And the brake operation of the second axle can be easily performed. Further, since it is possible to apply the brakes to the first axle and the second axle, when the operation of lifting the other with one of the first wheel and the second wheel as the fulcrum is performed, the fulcrum is used. The wheels can be stabilized, and the wheels can be lifted stably using a lever.

Here, the braking means can be in any form. For example, mechanical brakes such as band brakes, servo brakes, disc brakes and drum brakes used in automobiles, which are generally used in bicycles, can be used, but the present invention is not limited thereto.

Further, in one embodiment, the first and second braking switching means move the first wheel and the second wheel in the backward direction with the first axle and the second axle braked, respectively. Is equipped with a one-way clutch mechanism that is rotatable and non-rotatable in the forward direction. In this case, if the brake is applied when the carrier is moved in the backward direction so that the carrier goes up the stairs from the back side, the movement in the downward direction (forward direction) of the carrier is restricted. Due to the function of the one-way clutch mechanism, the movement of the carrier in the direction of climbing the steps is not restricted. Therefore, if the brake is applied when the carrier is retracted so as to climb the step, for example, it is possible to prevent the carrier from moving forward and falling from the stairs, and it is possible to safely go up and down. It becomes. In this case, the carrier can be moved so that the carrier climbs the stairs little by little, and the carrier can be reliably moved to climb the stairs little by little.

Further, in one embodiment, at least one of the back frame and the seat frame is provided with a second grip protruding in the forward direction. By using the second grip, the carrier can be operated not only from the back side of the carrier provided with the first grip on the back frame, but also from the front side of the carrier with the second grip protruding. A person can operate the carrier, and two operators can operate the carrier. A heavy object to be carried can be placed on the carrier for better workability, and the person can go up and down stairs or move on a flat surface. It becomes possible. Here, the transported object to be placed on the carrier may be either a baggage or a person. Further, the case where the first grip is not provided and only the second grip is provided may be provided. In that case, the second grip is projected in the backward direction.

The second grip may be adjustable in length with respect to the forward or backward direction. The second grip may be detachably attached to at least one of the back frame and the seat frame, or may be fixed. If the second grip is detachably attached, the second grip can be removed out of the way when not needed. Further, when the second grip is fixed, the risk of losing the second grip can be eliminated.

Further, the second grip may be attached so as to be able to move relative to the back frame or the seat frame (linear movement or rotational movement), or may be attached so as not to move relative to the back frame or the seat frame. Good. If the second grip is relatively movable, the second grip can be adjusted to an easy-to-use position, and if the second grip does not move relatively, the second grip can be attached to the back frame or the like. It is possible to have a simple structure.

However, in the following embodiments, in addition to the back frame, the first wheel and the second wheel of the seat frame, which are essential configurations of the carrier of the present invention, a carrier having the above-mentioned preferable configuration will be mentioned. That is, the carrier of the embodiment is provided with an extension frame and a third wheel in addition to the above-mentioned essential configuration, the extension frame is pivotally attached to the seat frame, and the seat is seated to the back frame. A structure in which a face frame is pivotally attached, first and second braking means for braking the first and second axles, clutch mechanisms provided on the first and second wheels, and a first It has a mechanism that allows the 2 grips to be attached and detached. Further, in the following embodiment, the carrier is a mode in which the caregiver carries a person who has difficulty walking (referred to as a care recipient), but the carrier of the present invention is not limited to a person but is carried by luggage or the like. There may be. For example, when carrying a load or the like that does not need to consider the riding comfort of the carrier, the carrier does not need to be provided with an extension frame and a third wheel.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a perspective view for explaining the carrier 100 according to the first embodiment of the present invention, and shows the appearance of the carrier 100. FIG. 2 is a perspective view showing a part of the carrier 100 shown in FIG. 1 as a perspective view, and FIG. 3 is a plan view showing a structure of the carrier 100 shown in FIG. 1 as viewed from the A direction.

The carrier 100 of the first embodiment is a carrier capable of raising and lowering a step, and has a back frame 110, a seat frame 120, and an extension frame 130 provided below the seat frame 120. .. At least one first wheel 10 is provided in the lower part of the back frame 110, at least one second wheel 20 is provided in the lower part of the seat frame 120, and at least one second wheel 20 is provided in the lower part of the extension frame 130. One third wheel 30 is provided.

Here, at least one first wheel 10 is a pair of front wheels 10a and 10b (also referred to as a right front wheel 10a and a left front wheel 10b) provided on both left and right sides of the lower portion of the back frame 110. The at least one second wheel 20 is a pair of elevating rear wheels 20a and 20b provided on both left and right sides of the lower portion of the seat frame 120 (also referred to as elevating right rear wheel 20a and elevating left rear wheel 20b). Is. The at least one third wheel 30 is a pair of rear wheels 30a and 30b for plane movement provided on the left and right sides of the extension frame 130 (also referred to as a right rear wheel 30a for plane movement and a left rear wheel 30b for plane movement). Is. The carrier 100 includes a first axle 11 that supports the first wheel 10, a second axle 21 that supports the second wheel 20, and a first braking means 40 that brakes the first axle 11. And a second braking means 50 that brakes the second axle 21.

Further, the seat frame 120 is pivotally attached to the back frame 110 around the left-right axis (111e) of the carrier 100, and the seat frame 120 is pivotally attached around the left-right axis of the carrier 100. An extension frame 130 is attached so as to be pivotable.

In the carrier 100, a seat surface seat Ss that forms a seat surface on which the care recipient Cr (see FIG. 11) sits is attached straddling the back frame 110 and the seat surface frame 120, and the back frame 110 A back sheet Bs that serves as a backrest for the care recipient Cr (see FIG. 11) is attached to the upper part.

From the safety aspect of the care recipient Cr, a headband for fixing the head of the care recipient Cr may be provided on the upper part of the back frame 110, and the seat surface frame 120 or the back frame 110 may be provided. May be provided with a waistband for fixing the waist of the care recipient Cr.

The distance from the shaft 111e that makes the seat frame 120 and the rear frame 110 pivotable to the center of the first wheel 10a and the distance from the shaft 111e to the center of the second wheel 20a can be of any length. However, the relationship that the distance from the shaft 111e to the center of the first wheel 10a is longer than the distance from the shaft 111e to the second wheel 20a is maintained. In one embodiment, for example, the distance from the shaft 111e to the center of the first wheel 10a is about 370 mm to about 470 mm, and the distance from the shaft 111e to the center of the second wheel 20a is about 200 mm to about 300 mm.

In one embodiment, for example, the relationship between the distance from the shaft 111e to the center of the first wheel 10a and the distance from the shaft 111e to the center of the second wheel 20a is about 1.2: 1 to about 2.4. It is 1.

Further, the carrier 100 has an angle formed by the side frame pieces 111a and 111b of the back frame 110 and the side frame pieces 121a and 121b of the seat frame 120 when the seat frame 120 is spread with respect to the back frame 110. (Frame intersection angle) is about 90 °. However, the present invention is not limited to this. It can be adjusted to an appropriate frame crossing angle in consideration of the ride comfort of the person being carried and the stability of the luggage.

Further, in the embodiment shown in FIG. 11, the object to be transported is a care recipient (person), but the present invention is not limited to this. It may be an object.

1 to 3 show the state of the carrier 100 when the carrier 100 moves on a flat surface, and the front wheels 10a and 10b and the right rear wheels 30a and 30b for moving the flat surface are ground surfaces such as the ground and the floor. The state of being grounded to GL is shown.

Hereinafter, the back frame 110, the seat frame 120, and the extension frame 130 in the carrier 100 will be described in detail.

4A and 4B are perspective views for explaining the carrier 100 shown in FIG. 1 in detail. FIG. 4A shows a back frame 110, FIG. 4B shows a seat frame 120, and FIG. c) shows the extension frame 130, and FIG. 4D shows a state in which the seat frame 120 and the extension frame 130 are combined.

[Back frame 110]
As shown in FIG. 4A, the back frame 110 includes a pair of side frame pieces 111a and 111b, an upper frame piece 112, an intermediate frame piece 113, and a lower frame piece 114. In the embodiment shown in FIG. 4, in the back frame 110, each frame piece is composed of a separate component, but the present invention is not limited thereto. For example, the back frame 110 may be composed of all or a part of each frame piece as one member.

The upper frame piece 112 is a grip portion (first grip portion) of the back frame 110, and both ends of the upper frame piece 112 are made of a pair of side frame pieces 111a and 111b by the left and right connecting members 112a and 112b. It is connected to the top edge. Brake levers 116a and 116b are attached to the upper frame piece 112.

The lower frame piece 114 is a member that connects the lower ends of the pair of left and right side frame pieces 111a and 111b, and both ends of the lower frame piece 114 are left and right pair of side frame pieces by the left and right component fixtures 114a and 114b. It is fixed to the lower ends of 111a and 111b.

The intermediate frame piece 113 is a member that connects an intermediate portion between the upper end and the lower end of the right side frame piece 111a and an intermediate portion between the upper end and the lower end of the left side frame piece 111b, and is an intermediate frame. Both ends of the piece 113 are fixed to the intermediate portion of the pair of side frame pieces 111a and 111b by the left and right component fixtures 113a and 113b. The intermediate frame piece 113 is a portion to which one end side of the seat surface seat Ss is attached.

In order to rotatably support the side frame piece 111a to the side frame piece 121a constituting the seat frame 120 in the portion of the side frame piece 111a between the component fixture 113a and the component fixture 114a. A pin insertion hole 111c for inserting the support pin 111e of the above is formed, and the side frame piece 111b is also inserted into the seat frame in the portion between the component fixture 113b and the component fixture 114b in the side frame piece 111b. A pin insertion hole 111d for inserting a support pin 111f for rotatably supporting the side frame piece 121b constituting the 120 is formed.

Further, in the portions of the side frame pieces 111a and 111b between the pin insertion holes 111c and 111d and the component fixtures 113a and 113b, the seat surface frame 120 is supported at a predetermined relative position with respect to the back frame 110, respectively. One ends of the frame support members 115a and 115b of the above are rotatably attached. Here, the frame support members 115a and 115b have a structure in which the second grips 118a and 118b can be attached.

Further, a pair of front bearings 11a and 11b are attached to the lower ends of the pair of left and right side frame pieces 111a and 111b, respectively. A front axle (first axle) 11 is rotatably supported on the front axles 11a and 11b, and right front wheels 10a and left front wheels 10b are fixed to both ends of the front axle 11 via bearings.

Here, the front wheel brake 40 is attached to the lower frame piece 114, and the brake wire 116d from the brake lever 116b attached to the upper frame piece 112 is connected to the front wheel brake (first braking means) 40. The front wheel brake 40 is configured to brake the front axle 11 that supports the right front wheel 10a and the left front wheel 10b in response to the operation of the brake lever 116b. Further, the right front wheel 10a and the left front wheel 10b have a one-way clutch mechanism 12 that allows the right front wheel 10a and the left front wheel 10b to rotate in the direction in which the carrier 100 retracts while the brake is applied to the front axle 11. Have.

Therefore, when the brake lever 116b is braked so that the front wheel brake 40 applies braking to the front axle 11, braking is performed against the rotation of the right front wheel 10a and the left front wheel 10b in the direction in which the carrier 100 advances. With respect to the rotation of the right front wheel 10a and the left front wheel 10b in the direction in which the carrier 100 retracts, the one-way clutch mechanism operates to bring about a braking state in which braking is not applied. Further, when the braking on the front axle 11 by the front wheel brake 40 is released by releasing the braking operation of the brake lever 116b, the right front wheel 10a and the left front wheel 10b are in a non-braking state in which braking is not applied in any rotation direction.

When the brake lever 116b is not operated, the front wheel brake 40 is not applied. In this state, the front wheel axle 11 is freely rotatable, and therefore the front wheel 10b connected to the front wheel axle 11 via the one-way clutch mechanism 12 is also freely rotatable.

On the other hand, when the brake lever 116b is operated, the front wheel axle 11 is braked and the front wheel axle 11 does not rotate. However, the front wheel 10b can rotate in the direction in which the carrier 100 retracts with respect to the front wheel shaft 11 by the function of the one-way clutch mechanism 12. Therefore, the carrier 100 can freely move in the backward direction even when the front wheel axle 11 is braked.

Further, the brake lever 116b may have a lock function for locking the braking state in which the front wheel shaft 11 is braked, and a function for adjusting the strength of the brake in the locked braking state.

FIG. 4A is a schematic view for explaining the brake lever 116b, and shows the detailed structure of the brake lever 116b (part D in FIG. 1).

The brake lever 116b is a lock member 63 that locks the relative positions of the operating lever piece 61 for human operation, the lever piece support 62 that supports the operating lever piece 61, and the operating lever piece 61 with respect to the lever piece supporting member 62. And have.

The lever piece support 62 has a support body 621, a fixing band 622 and a fixing screw 623 for fixing the support body 621 to the upper frame piece 112, and a fixing cam 624 attached to the support body 621. Here, the operation lever piece 61 is rotatably attached to the support main body 621 by the connection pin 625, and the portion of the fixed cam 624 facing the operation lever piece 61 is along the outer peripheral edge of the arc. A saw blade-shaped portion in which a plurality of saw blade-shaped convex portions 624a are lined up is included.

The end of the outer wire 116d2 constituting the brake wire 116c is attached to the wire receiving portion 621a of the support main body 621, and the end of the inner wire 116d1 constituting the brake wire 116c is operated by the wire connecting pin 116d3. It is connected to the piece 61.

The lock member 63 is fixed to the rotating piece 631 rotatably attached to the operating lever piece 61 by the connecting pin 61a and the rotating piece 631, and the saw blade-shaped convex portion 624a of the saw blade-shaped portion of the fixed cam 624. Has an engaging piece 632 that engages with.

In the brake lever 116b having such a configuration, the engaging piece 632 of the lock member 63 engages with the saw blade-shaped convex portion 624a of any of the fixed cams 624, so that the front wheel shaft 11 is braked in a braking state. The brake lever 116b will be locked. In this locked state, the braking state in which the front wheel axle 11 is braked is maintained even if the operator releases the brake lever 116b. Further, the strength of the braking force in the locked state can be adjusted by changing the position where the brake lever 116b is locked.

The one-way clutch mechanism 12 of the front wheels 10a and 10b does not have to work when the brake lever 116b is operated, and the one-way clutch mechanism 12 of the front wheels 10a and 10b does not necessarily work when the brake lever 116b is operated. It may be possible to set it so that it does not work. Further, the front wheels 10a and 10b may not have the one-way clutch mechanism 12.

[Seat frame 120]
As shown in FIGS. 4B and 4D, the seat frame 120 includes a pair of side frame pieces 121a and 121b, an upper frame piece 122, and a lower frame piece 123. In the embodiment shown in FIG. 4, in the seat frame 120, like the back frame 110, each frame piece is composed of separate parts, but the present invention is not limited thereto. For example, all or part of each frame piece may be composed of one member.

Here, the slide holders 70a and 70b are rotatably attached to the side frame pieces 121a and 121b, and the slide holders 70a and 70b have the other ends of the frame support members 115a and 115b attached to the slide holders 70a. , 70b is configured to be slidably held. Further, the slide holder 70a has a lock pin (not shown) at a position (predetermined relative position) where the side frame piece 111a of the back frame 110 and the side frame piece 121a of the seat frame 120 form a predetermined angle. It has a locking function of fixing the frame support member 115a to the slide holder 70a with a lock pin. Similarly, the slide holder 70b also has a lock pin (not shown), and a position where the side frame piece 111b of the back frame 110 and the side frame piece 121b of the seat frame 120 form a predetermined angle (predetermined relative position). It has a locking function of fixing the frame support member 115b to the slide holder 70b with a lock pin. The means for locking the side frame piece of the back frame 110 and the side frame piece of the seat frame 120 at a predetermined angle is limited to the above-mentioned frame support member and slide holder. is not.

Here, the position where the side frame pieces 111a and 111b of the back frame 110 and the side frame pieces 121a and 121b of the seat frame 120 form a predetermined angle is, for example, a state in which the care recipient Cr can ride on the carrier 100. The first position in which the seat surface frame 120 is spread out with respect to the back frame 110 so as to be, and the second position in which the seat surface frame 120 is superposed on the back frame 110 so that the carrier 100 can be compactly stored. Including the position of.

The upper frame piece 122 is a member that connects the upper ends of the pair of left and right side frame pieces 121a and 121b, and both ends of the upper frame piece 122 are formed by the left and right connecting members 122a and 122b to connect the pair of side frame pieces 121a and 121b. It is connected to the top of the. The upper frame piece 122 is a portion of the seat surface frame 120 to which the other end side of the seat surface seat Ss is attached.

The lower frame piece 123 is a member that connects the lower ends of a pair of left and right side frame pieces 121a and 121b, and both ends of the lower frame piece 123 are formed by a pair of left and right side frame pieces by left and right component fixtures 123a and 123b. It is fixed at the locations 121a and 121b.

Further, a pair of rear bearings 21a and 21b are attached to the lower ends of the pair of left and right side frame pieces 121a and 121b, respectively, and a second axle (elevating axle 21) can be rotated on the rear bearings 21a and 21b. It is supported, and right rear wheels 20a for raising and lowering and left rear wheels 20b for raising and lowering are attached to both ends of the second axle (lifting axle 21). Here, like the front wheels 10a and 10b, a one-way clutch mechanism (not shown) is attached to the elevating rear wheels 20a and 20b by press fitting or the like, and both ends of the elevating axle 21 are after elevating. The wheels 20a and 20b are connected to a one-way clutch mechanism (not shown).

Here, the rear wheel brake 50 is attached to the lower frame piece 123, and the brake wire 116c from the brake lever 116a attached to the upper frame piece 112 of the back frame 110 is connected to the rear wheel brake 50. The rear wheel brake 50 is configured to brake the elevating axle 21 that supports the elevating right rear wheel 20a and the elevating left rear wheel 20b in response to the operation of the brake lever 116a. Further, the elevating right rear wheel 20a and the elevating left rear wheel 20b, like the right front wheel 10a and the left front wheel 10b, move up and down in the direction in which the carrier 100 retracts with the brake applied to the elevating axle 21. It has a one-way clutch mechanism that allows the rotation of the right rear wheel 20a for lifting and the left rear wheel 20b for raising and lowering.

Therefore, when the brake lever 116a is operated so that the rear wheel brake 50 brakes the elevating axle 21, the rotation of the elevating right rear wheel 20a and the elevating left rear wheel 20b in the direction in which the carrier 100 moves forward. The one-way clutch mechanism works and braking is not applied to the rotation of the right rear wheel 20a for raising and lowering and the left rear wheel 20b for raising and lowering in the direction in which the carrier 100 retracts. Become. Further, when the braking of the elevating axle 21 by the rear wheel brake 50 is released by releasing the braking operation of the brake lever 116a, the right rear wheel 20a for elevating and the left rear wheel 20b for elevating are braked in any rotation direction. It will be in a non-braking state without braking.

As described above, in the carrier 100, the elevating axle 21, the rear wheel brake 50, and the one-way clutch mechanism (not shown) are used in the forward and backward directions of the elevating right rear wheel 20a and the elevating left rear wheel 20b. A second braking switching means for switching between a braking state in which braking is applied only to the rotation in the forward direction and a non-braking state in which braking is not applied to the rotation of the elevating right rear wheel 20a and the elevating left rear wheel 20b. It is configured.

The one-way clutch mechanism of the elevating right rear wheel 20a and the elevating left rear wheel 20b does not necessarily have to work when the brake lever 116a is operated, and the elevating right rear wheel 20a and the elevating left rear wheel 20a do not necessarily work. The one-way clutch mechanism of the wheel 20b may be set so as not to work when the brake lever 116a is operated. Further, the elevating right rear wheel 20a and the elevating left rear wheel 20b may not have a one-way clutch mechanism.

Further, a pair of left and right frame holding plates 60a and 60b are attached to the lower frame piece 123, and the elevating axle 21 rotatably penetrates the frame holding plates 60a and 60b. The frame holding plate 60a holds the axle support plate 131a constituting the extension frame 130 in a constant posture. Similarly, the frame holding plate 60b also holds the axle support plate 131b constituting the extension frame 130 in a constant posture.

Axle support plates 131a and 131b constituting the extension frame 130 are rotatably attached to the elevating axle 21, and the axle support plates 131a and 131b are held in a fixed posture (when moving in a plane) by the frame holding plates 60a and 60b. The extension frame 130 is held in an upright state with respect to the ground contact surface, and the plane moving rear wheels 30a and 30b supported by the extension frame 130 are in a state of being in contact with the ground contact surface. The axle support plates 131a and 131b are held by the frame holding plates 60a and 60b in another fixed posture (posture when ascending or descending a step), so that the extension frame 130 is stored in the seat frame 120. ..

[Extension frame 130]
As shown in FIGS. 4C and 4D, the extension frame 130 has a pair of axle support plates 131a and 131b and a plane moving axle 31. Here, the pair of axle support plates 131a and 131b are rotatably attached to the elevating axle 21. That is, axle through holes 32a and 32b for penetrating the lifting axle 21 are formed at the roots of the pair of axle support plates 131a and 131b, and the pair of axle support plates 131a and 131b have axle through holes. It is rotatably supported by an elevating axle 21 inserted into 32a and 32b. Axle through holes 31a and 31b are formed at the tips of the pair of axle support plates 131a and 131b. Both ends of the plane moving axle 31 are inserted into the axle through holes 31a and 31b of the pair of axle support plates 131a and 131b, respectively, and are rotatably supported. The right rear wheel 30a for plane movement and the left rear wheel 30b for plane movement, which form the third wheel 30, are attached to both ends of the plane movement axle 31.

Therefore, in the extension frame 130 having such a structure, the position around the lifting axle 21 is retracted from the position when the third wheel 30 touches the ground together with the first wheel 10 and the position when the third wheel 30 is in contact with the ground. Then, instead of the third wheel 30, the second wheel 20 can move to and from the position at the time of step up and down where the second wheel 20 comes into contact with the first wheel 10.

Here, the extension frame 130 has a structure that cannot be removed from the seat frame 120, but the extension frame 130 may have a structure that can be attached to and detached from the seat frame 120 together with the third wheel 30.

In the carrier 100 of the first embodiment, the members constituting the above-mentioned frame pieces, plates, axles, connecting members 112a and 112b, and component fixtures 113a, 113b, 114a and 114b are made of any material. Can be formed. For example, it may be a metal member such as steel or stainless steel, a resin member or a wooden member, or a composite member such as a metal member, a resin member or a wooden member.

[Transformation of carrier 100]
The carrier 100 of the first embodiment having such a structure can be deformed into a shape suitable for each case when moving on a flat surface, when raising and lowering a step, and when storing.

5A and 5B are views for explaining a state in which the carrier 100 shown in FIG. 1 is deformed from the state shown in FIG. 3, FIG. 5A shows a state when ascending and descending, and FIG. 5B is a diagram. Indicates the folded state.

When moving on a flat surface, the carrier 100 is in a state where the first wheel 10 and the third wheel 30 are in contact with each other as shown in FIG. 3, and when moving up and down a step, the carrier 100 is shown in FIG. 5A. As shown, the first wheel 10 and the second wheel 20 are in a state of being in contact with the ground, and when they are stored, they are in a compactly folded state as shown in FIG. 5 (b).

Next, a procedure for changing the carrier 100 from the state when moving in a plane to the state when moving up and down a step will be described.

FIG. 6 is a plan view showing a procedure for transforming the carrier 100 from a state when moving in a plane to a state when moving up and down, and FIGS. 6 (a) and 6 (b) show how the extension frame 130 is retracted. And the state where the second wheel 20 touches the ground is shown.

In a state where the carrier 100 is moved in a plane, the left and right axle support plates 131a and 131b constituting the extension frame 130 are the left and right frame holding plates 60a so that the extension frame 130 stands up and the third wheel 30 touches the ground. It is in a state of being held by 60b.

Therefore, when the carrier 100 is deformed into a state where the step is raised and lowered, first, as shown in FIG. 6A, the holding state of the axle support plates 131a and 131b by the frame holding plates 60a and 60b is released and extended. The frame 130 is tilted from the upright state, and the second wheel 20 is brought into contact with the ground as shown in FIG. 6 (b). After that, the left and right axle support plates 131a and 131b are rotated to the retracted position and held by the left and right frame holding plates 60a and 60b at the retracted position, so that the extension frame 130 does not interfere with the step up and down of the carrier 100. Hold in place. Here, as shown in FIG. 5A, the retracted position is a position where the left and right axle support plates 131a and 131b substantially overlap the side frame pieces 121a and 121b of the seat frame 120.

Next, the procedure for changing the carrier 100 from the step-up / down state to the folded state will be described.

FIG. 7 is a plan view showing a procedure for folding the carrier 100, and FIG. 7 (a) shows a state in which the back frame 110 of the carrier 100 shown in FIG. 5 (a) is erected, and FIG. 7 (b) is shown. Shows how the seat frame 120 is rotated so as to overlap the back frame 110.

In order to bring the carrier 100 into the folded state, when the carrier 100 is in the state of being moved in a plane as shown in FIG. 3, first, the carrier 100 is set as shown in FIGS. 6A and 6B. After rotating the extension frame 130 to transform it into a state when it is raised and lowered, the lock pins (not shown) of the slide support members 70a and 70b release the lock of the seat frame 120 with respect to the back frame 110, for example, FIG. As shown in (a), with the back frame 110 of the carrier 100 upright, the lower end portion (the portion on the second wheel 20 side) of the seat frame 120 is pressed downward. As a result, the portion where the seat frame 120 and the back frame 110 are pivotally supported so that the seat frame 120 overlaps the back frame 110 (support pins 111e inserted into the bolt insertion holes 111c, 111d, 121c, 121d) is formed. Rotating around the center, the carrier 100 is in the folded state shown in FIG. 5 (b).

When the carrier 100 is in the state of ascending / descending a step as shown in FIG. 5A, the seat frame 120 is rotated with respect to the back frame 110 as shown in FIGS. 7A and 7B. The carrier 100 can be put into a folded state just by moving it.

Further, the carrier 100 may have an adjusting means for adjusting the distance between the first wheel 10 and the second wheel 20.

By providing such an adjusting means, depending on the dimensions of the stairs, specifically, the tread dimensions (the dimensions in the depth direction of the portion on which the feet of each step of the stairs are placed) and the rise dimensions (the height of one step of the stairs). It is possible to avoid the case where the first wheel 10 and the second wheel 20 of the carrier 100 have to be lifted up or down the stairs at the same time.

The adjusting means for adjusting the distance between the first wheel 10 and the second wheel 20 may be in any form.

In one embodiment, the carrier 100 is positioned to pivotally support the side frame pieces 121a, 121b of the seat frame 120 of the side frame pieces 111a, 111b constituting the back frame 110 (pin insertion holes 111c, A portion closer to the wheel side (wheel side portion) than the position of 111d) may be configured to be expandable and contractible. Even in the carrier 100 having such a configuration, the distance between the first wheel 10 and the second wheel 20 can be adjusted.

In yet another embodiment, the carrier 100 is located at a position (pin insertion hole 121c) that pivotally supports the side frame pieces 111a, 111b of the back frame 110 of the side frame pieces 121a, 121b constituting the seat frame 120. , 121d position) may be configured so that the portion closer to the wheel side (wheel side portion) can be expanded and contracted. Even in the carrier 100 having such a configuration, the distance between the first wheel 10 and the second wheel 20 can be adjusted.

Further, in another embodiment, when the seat frame 120 is expanded with respect to the back frame 110, the carrier 100 has side frame pieces 111a and 111b of the back frame 110 and side frame pieces 121a of the seat frame 120. , 121b may be configured so that the angle formed by (frame crossing angle) can be fixed to a desired angle. With such a configuration, it is possible to change the distance between the first wheel 10 and the second wheel 20. For example, in one embodiment, the frame crossing angle can be fixed at any angle in the range of at least about 90 ° ± 2 to 5 °. However, the present invention is not limited to this.

In still another embodiment, the carrier 100 adjusts the wheel-side portion of the back frame 110, the wheel-side portion of the seat frame 120, and the frame crossing angle. It may have at least two of the possible configurations.

[Principle of step up and down using lever]
Next, the principle that the carrier 100 of the present invention moves up and down a step will be described.

8 to 10 are diagrams for explaining the principle of raising and lowering the carrier.

The carrier 100 goes up the step in a state where the second wheel moves forward of the first wheel in the traveling direction (hereinafter referred to as “backward”) when going up the step, and goes up the step when going down the step. The wheel is designed to go down the step in a state where the wheel moves in the front side in the traveling direction with respect to the second wheel (hereinafter, forward). Further, the carrier 100 uses one of the first wheel 10 (right front wheel 10a and left front wheel 10b) and the second wheel 20 (elevating right rear wheel 20a and elevating left rear wheel 20b) as fulcrums and stairs with the other as a fulcrum. It is configured to be pulled up to the upper step of the stairs or pulled down to the lower step of the stairs.

8 (a) to 8 (d) show that the first wheel 10 (right front wheel 10a) of the carrier 100 is used as a fulcrum, and the second wheel 20 (right rear wheel 20a for raising and lowering) is the first staircase St. It shows how to move it to the top of the step. In the following description, since only the right front wheel 10a is shown as the first wheel 10 and only the elevating right rear wheel 20a is shown as the second wheel 20 in FIGS. 8 to 10, the first wheel is shown. The right front wheel 10a and the left front wheel 10b as the wheels 10 are referred to as the front wheels 10a, and the elevating right rear wheel 20a and the elevating left rear wheel 20b as the second wheel 20 are referred to as the elevating rear wheel 20a. However, it goes without saying that the left front wheel 10b and the elevating left rear wheel 20b move in the same manner as the right front wheel 10a and the elevating right rear wheel 20a.

As shown in FIG. 8A, when the operator moves the carrier 100 backward toward the stairs St and climbs the stairs St, the brake lever 116b is operated on the front wheel axle 11 as shown in FIG. 4B. The brake is applied, similarly, the elevating axle 21 is braked by operating the brake lever 116a, and further, as shown in FIG. 4C, the locking member 63 is operated to engage the predetermined saw blade-shaped convex portion 624a of the fixed cam 624. Engage the plaque 632.

As a result, as shown in FIG. 4A (d), the brake shoes 42a and 42b are in pressure contact with the brake drum 41 fixed to the front wheel shaft 11, and the brake drum 41 cannot rotate. In this state, the front wheel axle 11 is braked, but the front wheels 10a and 10b are in the direction in which the carrier 100 moves rearward with respect to the front wheel axle 11 due to the action of the one-way clutch mechanism 12 inside. Rotates. Similarly, the elevating axle 21 is braked, but the elevating rear wheels 20a and 20b have the carrier 100 with respect to the elevating axle 21 due to the action of the one-way clutch mechanism (not shown) inside the elevating axle 21. It rotates in the direction of moving backward.

Therefore, by operating the brake levers 116b and 116a, the carrier 100 can move in the direction of going up the stairs St, but cannot move in the direction of going down the stairs St.

Here, the strength of the braking force when the brake levers 116b and 116a are locked with the front axle 11 and the elevating axle 21 braked is determined by the locking member 63 of the operating lever piece 61 as shown in FIG. 4C. The engagement piece 632 of the lock member 63 can be adjusted by operating which of the plurality of saw blade-shaped convex portions 624a of the fixed cam 624 of the lever piece support 62 is engaged. At that time, the strength of the braking force can be adjusted between a plurality of levels of strength such as large, medium and small according to the amount of tension of the inner wire 116d1 by the operating lever piece 61.

The operation of the carrier 100 going up the stairs is performed while maintaining the locks of the brake levers 116a and 116b as described above. By such an operation, the front axle 11 and the elevating axle 21 can be kept braked, and the carrier 100 can be prevented from moving down the stairs.

When the operator moves the carrier 100 backward so that the rear wheel 20a for raising and lowering the carrier 100 comes to the front of the stairs St as shown in FIG. 8B, the operator moves the upper end of the back frame 110. Lift the grip portion 112 of the stairs upward. As a result, as shown in FIG. 8C, the front wheel 10a serves as a fulcrum (center) and the force for rotating the carrier 100 acts on the carrier 100 to lift the rear wheel 20a for raising and lowering, and further, the operation is performed. When a person pulls the grip portion 112 at the upper end of the back frame 110 toward the stairs, the front wheel 10a, which is the fulcrum (center), moves backward, and the rear wheel 20a for raising and lowering the stairs as shown in FIG. Placed on one step (step) of St. Subsequently, the operation of mounting the elevating rear wheel 20a on the next higher stage is performed.

9 (e) to 9 (h) show that the first wheel 10 (right front wheel 10a) of the carrier 100 is used as a fulcrum, and the second wheel 20 (elevating right rear wheel 20a) is used as a fulcrum in the second stage. It shows how to move it up.

While maintaining the locked state of the brake levers 116a and 116b, as shown in FIGS. 9 (e) to 9 (f), the operator moves the carrier 100 further backward toward the stairs St and moves up and down. When the rear wheel 20a comes to the front of the second step of the stairs St, the operator raises the grip portion (first grip) 112 at the upper end of the back frame 110 as shown in FIG. 9 (f). lift. At this time, since the front axle 11 and the elevating axle 21 are in the braked state, the carrier 100 does not unexpectedly move forward and fall down the stairs St. As a result, the carrier 100 of the present invention can safely and securely move up and down stairs.

With the elevating rear wheel 20a lifted to the height of the second step, the operator pulls the carrier 100 toward the stairs as shown in FIG. 9 (g), as shown in FIG. 9 (h). As described above, the rear wheel 20a for raising and lowering is placed on another step above the stairs St. Subsequently, the operation of placing the front wheel 10a on the first step of the stairs is performed.

10 (i) to 10 (l) show the first wheel 10 (front wheel 10a) of the stairs St with the second wheel 20 (rear wheel 20a for raising and lowering) of the carrier 100 as a fulcrum. It shows how to move it up.

While maintaining the locked state of the brake levers 116a and 116b, as shown in FIG. 9H, the operator operates the carrier with the rear wheels 20a for raising and lowering the carrier 100 mounted on the second step. When the front wheel 10a comes to the front of the first step of the stairs St by moving the 100 backward, the operator moves the grip portion 112 of the back frame 110 backward as shown in FIG. 10 (i). By pulling, the front wheel 10a is lifted by the force for rotating the carrier 100 acting on the carrier 100 based on the principle of the lever with the elevating rear wheel 20a as the fulcrum (center). Further, when the operator pulls the grip portion 112 at the upper end of the back frame 110 rearward, the front wheel 10a is placed on the first step of the stairs St as shown in FIG. 10 (j). In this way, the force for rotating the carrier 100 acts on the carrier 100 based on the principle of the lever with the elevating rear wheel 20a as the fulcrum (center), so that the carrier can be raised without labor.

After that, when the operator moves the carrier 100 backward and the rear wheel 20a for raising and lowering comes to the front of the third step of the stairs St, the operator moves the back frame as shown in FIG. 10 (k). Lift the grip portion 112 at the upper end of 110 upward. As a result, the force that rotates the carrier 100 with the front wheel 10a as a fulcrum acts on the carrier 100, so that the rear wheel 20a for raising and lowering is lifted, and further, as shown in FIG. 10 (l), the operator moves the back. By pulling the grip portion 112 at the upper end of the frame 110 rearward, the front wheel 10a serving as a fulcrum moves rearward, and the rear wheel 20a for raising and lowering is placed on the third step of the stairs St.

By repeating such an operation, the stairs St can be safely raised to the carrier 100 while the front wheels 10a and the rear wheels 20a for raising and lowering are braked.

Further, in order to cause the carrier 100 to move down the stairs St, the operator may perform FIGS. 8 (a) to 8 (d) and 9 (FIG. 9) with the brakes on the front axle 11 and the elevating axle 21 released. By performing an operation opposite to the operations shown in e) to FIGS. 9 (h) and 10 (i) to 10 (l), the carrier 100 can be lowered to the stairs St.

That is, as shown in FIG. 10 (l), the operator carries the vehicle with the front wheels 10a of the carrier 100 located above the first step of the stairs and the rear wheels 20a for raising and lowering located at the third step of the stairs. When the tool 100 is moved forward (a state in which the first wheel is moved to the front side in the traveling direction with respect to the second wheel and is moved to the right on the paper surface of FIGS. 8 to 10), the rear wheel for raising and lowering is moved. When 20a lands on the second step of the stairs (FIG. 10 (k)) and the operator advances the carrier 100, the front wheels 10a move on the stairs as shown in FIGS. 10 (j) and 10 (i). It comes down to the ground plane under St. Then, when the operator further advances the carrier 100, the elevating rear wheel 20a descends from the second step to the first step of the stairs St as shown in FIGS. 9 (h) to 9 (e), and further. By advancing the carrier 100, as shown in FIGS. 8 (d) to 8 (a), the ascending / descending rear wheel 20a descends from the first step of the stairs St to the ground contact surface under the stairs St.

The operation of descending the stairs St to the carrier 100 is basically performed with the brakes on the front bearing 11a and the elevating axle 21 released, but the first wheel or the second wheel is moved from the upper step of the stairs. The brakes may be activated when lowering the stairs to prevent the carrier from inadvertently descending the stairs.

For example, by operating the brake levers 116b and 116a, the brake levers 116a and 116b are locked with respect to the front bearing 11a and the elevating axle 21 in a half-brake state (brake with a weak braking force), and the front bearing 11a and the elevating axle 21 are locked. The carrier may be lowered on the stairs while giving resistance to the rotation of the bearing. By doing so, it becomes possible to lower the carrier more safely.

In the method of using the carrier 100 described above, when the carrier 100 is to climb the stairs St, the brake levers 116b and 116a are pressed with the brakes applied to the first axle 11 and the second axle 21. It remains locked, but the invention is not limited to this. It may be a case where the brake levers 116b and 116a are moved up and down without being locked.

Hereinafter, a case where the care recipient Cr is actually placed on the carrier 100 to move horizontally and move up and down stairs will be described.

FIG. 11 is a diagram for explaining an operation in which the care recipient Cr is placed on the carrier 100 and moves in a plane, and FIGS. 11 (a) and 11 (b) are views of the first wheel 10 of the carrier 100. It is a side view and the front view which show the state which the 3rd wheel 30 and a 3rd wheel 30 are in contact with each other.

First, as shown in FIGS. 11A and 11B, the movement of the plane of the carrier 100 is the plane of the right front wheel 10a and the left front wheel 10b as the first wheel 10 and the third wheel 30. This is performed with the right rear wheel 30a for movement and the left rear wheel 30b for plane movement in contact with each other.

In reality, the carrier 100 on which the care recipient Cr is placed moves forward when the caregiver Cp1 located behind the carrier 100 pushes the carrier 100 as shown in FIG. 11A, and the caregiver Cp1 Retreats by pulling.

Next, when the carrier 100 moves in a plane as shown in FIG. 11 (a) and then the stairs St located in front of the carrier 100 is moved up and down, as shown in FIGS. 6 (a) and 6 (b). In the carrier 100, the extension frame 130 is released from the state of being held by the frame holding plates 60a and 60b, the extension frame 130 is moved to the retracted position, and the right rear wheel for plane movement as the third wheel 30 is released. Instead of the 30a and the left rear wheel 30b for moving in a plane, the right rear wheel 20a for raising and lowering and the left rear wheel 20b for raising and lowering as the second wheel 20 are brought into contact with the ground.

After that, the care recipient Cr is placed on the carrier 100 and the stairs St are moved up and down. Here, when the carrier 100 is lowered on the stairs St, the two caregivers Cp1 and Cp2 jointly operate the carrier 100 so that the impact transmitted to the care recipient Cr is reduced and the carrier 100 is operated smoothly. Shall be done. One caregiver Cp1 is located after the carrier 100 and the other caregiver Cp2 is located in front of the carrier 100 and jointly operates the carrier 100. Therefore, the caregiver Cp2 located in front of the carrier 100 operates the carrier 100 by using the second grips 118a and 118b attached to the frame support members 115a and 115b of the carrier 100.

Hereinafter, the operation of the carrier 100 climbing the stairs in collaboration with the two caregivers Cp1 and Cp2 will be specifically described.

12 to 14 are diagrams for explaining the operation method of the carrier 100 when the care recipient Cr is placed on the carrier 100 and the two caregivers Cp1 and Cp2 climb the stairs. Here, in FIGS. 12A and 12B, the carrier 100 is used as a fulcrum with the second wheel 20 (rear wheel 20a for raising and lowering) as a fulcrum, and the first wheel 10 (right front wheel 10a) is used as a ground contact surface of the stairs. 13 (c) and 13 (d) show how the first wheel 10 (front wheel 10a) is lifted from the stairs with the second wheel 20 (rear wheel 20a for raising and lowering) of the carrier 100 as a fulcrum. It shows how to pull it up one step.

Even when the care recipient Cr is placed on the carrier 100 and carried by two caregivers Cp1 and Cp2, when climbing the stairs, the brake levers 116b and 116a are operated on the front axle 11 and the elevating axle 21 of the carrier 100. Apply the brakes and keep the brake levers 116b, 116a locked. In this case, the braking force is such that the wheels do not rotate even if the carrier 100 is pushed forward.

As shown in FIG. 12A, the rear wheel 20a for raising and lowering the carrier 100 is located on the second step from the top of the stairs St, and the front wheel 10a of the carrier 100 is the fourth step from the top of the stairs St. The first caregiver Cp1 behind the carrier 100 pulls the grip (upper frame piece) 112 at the upper end of the back frame 110 toward the front and is in front of the carrier 100 while being located on the step. When the caregiver Cp2 of 2 lifts the tip of the second grip 118a, the carrier 100 is placed at the center of gravity of the carrier 100 in a state where the care recipient Cr is placed on the lever principle, with the elevating rear wheel 20a as a fulcrum. The lifting force works. As a result, a counterclockwise moment acts around the fulcrum, and the front wheel 10a rises as shown in FIGS. 12 (b) and 13 (c).

Then, when the front wheel 10a reaches the height of the third step from the top of the stairs St, the force of the first caregiver Cp1 pulling the grip of the back frame 110 and the force of the second caregiver Cp2 pushing up the second grip 118a. As a result, the carrier 100 moves rearward as shown in FIG. 13 (d) by rotating the front wheels 10a and the elevating rear wheels 20a by the action of the one-way clutch mechanism 12 in a state where the brake levers 116a and 116b are locked. The front wheel 10a is placed on the third step from the top of the stairs St.

Then, as shown in FIG. 14 (e), the first caregiver Cp1 behind the carrier 100 lifts the grip at the upper end of the back frame 110, and the second caregiver Cp2 in front of the carrier 100. Pushes down the tip of the second grip 118a, so that a force for lifting the carrier 100 acts on the center of gravity of the carrier 100 with the care recipient Cr mounted on the lever principle with the front wheel 10a as a fulcrum. As a result, a clockwise moment acts around the front wheel 10a, which is a fulcrum, and as shown in FIG. 14E, the rear wheel 20a for raising and lowering rises from the step above the stairs St.

Then, when the elevating rear wheel 20a reaches the height of the first step from the top of the stairs St, the first caregiver Cp1 pulls the grip of the back frame 110 backward and the second caregiver Cp2 becomes the second. As shown in FIG. 14 (f), the front wheel 10a, which is a fulcrum, avoids moving in the forward direction due to the action of the one-way clutch mechanism 12 in a state where the brake levers 116a and 116b are locked by the force pushing the grip 118a. In this state, the rear wheel 20a for raising and lowering moves in the backward direction and is placed on the first step from the top of the stairs St.

By such a series of operations, the front wheel 10a of the carrier 100 is located on the fourth step from the top of the stairs St, and the front wheel 10a of the carrier 100 climbs over one step from the top of the stairs St. It is in a state of being located on the third step, and the carrier 100 has climbed one step up the stairs St.

Next, the operation of the carrier 100 going down the stairs in collaboration with the two caregivers Cp1 and Cp2 will be specifically described.

15 to 17 are diagrams for explaining the operation method of the carrier 100 when the care recipient Cr is placed on the carrier 100 and the two caregivers Cp1 and Cp2 go down the stairs.

Here, in FIGS. 15A and 15B, the carrier 100 is used as a fulcrum with the first wheel 10 (front wheel 10a) as a fulcrum, and the second wheel 20 (rear wheel 20a for raising and lowering) is used as a predetermined step of the stairs. It shows how to lower it one step down from the top. 16 (c) and 16 (d) show that the first wheel 10 (front wheel 10a) is one step below the stairs with the second wheel 20 (rear wheel 20a for raising and lowering) of the carrier 100 as a fulcrum. Shows how to lower it to. 17 (e) and 17 (f) show that the first wheel 10 (front wheel 10a) is one step below the stairs with the second wheel 20 (rear wheel 20a for raising and lowering) of the carrier 100 as a fulcrum. Shows how to lower it to.

When going down the stairs St with the carrier 100, the carrier 100 will be moved forward, so the brakes on the front axle 11 and the elevating axle 21 should be released. However, if necessary, the first caregiver Cp1 located behind the carrier 100 may operate the brake levers 116a and 116b to adjust the speed of forward movement of the carrier 100. Further, the brakes on the front axle 11 and the elevating axle 21 are not released, but the brakes are set to a half-brake state so that a weak braking force acts on the front wheel axle 11 and the elevating axle 21, and the front bearing 11a and the elevating axle 21 are released. A resistance may be generated in the rotation of the 21 in the forward direction.

As shown in FIG. 15A, the elevating rear wheel 20a of the carrier 100 is located on the first step from the top of the stairs St, and the front wheel 10a of the carrier 100 is the third step from the top of the stairs St. The first caregiver Cp1 behind the carrier 100 pushes the grip at the upper end of the back frame 110 forward, and the second caregiver Cp2 in front of the carrier 100 is located on the step. By pulling the second grip 118a toward you, the carrier 100 moves forward. Then, when the carrier 100 further moves forward and the elevating rear wheel 20a exceeds the end of the first step from the top of the stairs St, the elevating rear wheel 20a is stairs as shown in FIG. 15 (b). It descends from the top of the st to the top of the second step, and as shown in FIG. 16C, the elevating rear wheel 20a lands on the second step from the top of the stairs St.

After that, the first caregiver Cp1 pushes the grip at the upper end of the back frame 110 forward, and the second caregiver Cp2 pulls the second grip 118a toward the front, so that the front wheel 10a is 3 from the top of the stairs St. Beyond the end of the step, the front wheel 10a descends from the top of the stairs St toward the top of the fourth step as shown in FIGS. 16 (d) and 17 (e), and FIG. 17 (f). ), The front wheel 10a lands on the fourth step from the top of the stairs St.

By such a series of operations, the front wheel 10a of the carrier 100 is located on the third step from the top of the stairs St, and the front wheel 10a of the carrier 100 gets over one step and is from the top of the stairs St. It will be located on the 4th step, and the carrier 100 will go down the stairs St by one step.

As described above, the carrier 100 of the first embodiment has the first wheel 10, the second wheel 20, and the third wheel 30, and these wheels are the back frame 110 and the seat frame 120, respectively. Since it is provided at the lower part of the extension frame 130, the first wheel 10 and the third wheel 30 come into contact with each other when moving on a plane, and the first wheel 10 and the second wheel 30 when moving up and down a step. It is possible for the wheel 20 to come into contact with the ground.

The posture when the first wheel 10 and the third wheel 30 come into contact with each other can be different from the posture when the first wheel 10 and the second wheel 20 come into contact with each other. It is possible to set the posture of the carrier to an appropriate posture when moving and when moving up and down a step.

Further, when the first wheel 10 and the second wheel 20 come into contact with each other, one of the first wheel 10 and the second wheel 20 should be used as a fulcrum when ascending and descending the step. Therefore, the other wheel can be easily lifted by the principle of leverage with a part of the back frame 110 or the seat frame 120 as a fulcrum, and the carrier can be raised and lowered without labor.

Further, since the extension frame 130 is pivotally attached to the seat frame 120 around the axis in the left-right direction, the second wheel 20 attached to the lower part of the seat frame 120 touches the ground. The state in which the third wheel 30 provided at the lower part of the extension frame 130 touches the ground instead of the second wheel 20 can be easily switched by rotating the extension frame.

Since the seat frame 120 is pivotally attached to the back frame 110 around the axis in the left-right direction, the seat frame 120 can be rotated to a position where both are substantially parallel to the back frame 110. , The carrier 100 can be folded compactly.

Further, the carrier 100 includes a first braking means 40 that brakes the front axle 11 of the first wheel 10 and a second braking means 50 that brakes the elevating axle 21 of the second wheel 20. Brake of the front axle 11 and the elevating axle 21 because the upper part of the back frame 110 includes the grip 112 and the grip 112 has a plurality of brake levers 116a, 116b for operating the first and second braking means. Since the operation can be easily performed and the front axle 11 and the elevating axle 21 can be braked, one of the first wheel 10 and the second wheel 20 can be used as a fulcrum for the other. When performing the lifting operation, the wheel serving as a fulcrum can be stably fixed, and the wheel can be stably lifted using the lever.

Further, the first wheel 10 and the second wheel 20 are the first wheel 10 and the first wheel 20 in a state where the front axle 11 and the elevating axle 21 are braked by the first and second braking means 40 and 50. Since it is equipped with a one-way clutch mechanism that rotates the wheels 20 of 2 in the backward direction, if a carrier that goes up the stairs while moving in the backward direction brakes the front axle 11 and the elevating axle 21, the brake will be applied. The forward movement (downhill) is blocked by the action of, and the backward movement (uphill) is not blocked by the action of the one-way clutch. Therefore, when the carrier 100 is retracted and climbs the stairs, it is possible to prevent the carrier 100 from advancing and falling from the stairs, and moreover, the movement of the carrier 100 for causing the carrier to climb the stairs is carried. It can be surely performed by retracting the tool 100 little by little.

Further, since the back frame 110 is provided with the second grips 118a and 118b protruding in the forward direction, the carrier 100 is provided with the first grip (upper frame piece) 112 on the back frame 110. The carrier can be operated not only from the back side of the carrier but also from the front side of the carrier on which the second grips 118a and 118b protrude, and the carrier can be operated by two operators (caregivers Cp1 and Cp2). It is possible to carry a heavy body such as a care recipient Cr on a carrier with good workability, and to move up and down stairs or move on a horizontal ground.

In the carrier 100 of the first embodiment, the second grips 118a and 118b protruding in the forward direction are attached to the back frame 110, but the second grips 118a and 118b protruding in the forward direction are the back portions. It may be mounted on the seat frame 120 instead of the frame 110, or may be mounted on the seat frame 120 in addition to the back frame 110.

Further, the second grips 118a and 118b may project in the retracting direction (second wheel 20 side) of the carrier 100, and the second grips 118a and 118b may project in the forward direction of the carrier 100. It may be possible to select whether to project in the (first wheel 10 side) or in the backward direction (second wheel 20 side).

FIG. 18 is a perspective view for explaining another example of the second grip (U-shaped grip 119) and the carrier 200 using the second grip, and the structure of the U-shaped grip 119 (FIG. 18 (FIG. 18). a)), A state in which the U-shaped grip 119 is projected in the forward direction by the carrier 200 (FIG. 18 (b)), and a state in which the U-shaped grip 119 is projected in the backward direction by the carrier 200. (Fig. 18 (c)) is shown.

The carrier 200 shown in FIGS. 18 (b) and 18 (c) slidably supports a U-shaped grip 119 instead of the frame support members 115a and 115b in the carrier 100 of the first embodiment shown in FIG. The frame support members 215a and 215b are provided, and other configurations are the same as those of the carrier 100 of the first embodiment.

Here, the frame support members 215a and 215b are specifically formed of a tubular body that slidably accommodates both side portions of the U-shaped second grip 119, with respect to the tubular body. It has a locking mechanism (not shown) that fixes the side side portion of the U-shaped second grip 119 at an arbitrary relative position between the two.

In the carrier 200 having such a configuration, the U-shaped second grip 119 can be projected by a predetermined length in the forward direction or the backward direction of the carrier 200 as shown in FIG. 18A. .. Therefore, as the carrier 200, by adjusting the length or the protruding direction of the second grip 119 according to the size and weight of the object to be transported, it is possible to carry a person or luggage only with the second grip 119. What can be realized can be realized, and in this case, the back frame 110 and the seat frame 120 can have a simple structure.

Further, in the carrier 200, the frame support members 215a and 215b may have a structure for detachably supporting the U-shaped second grip 119, but the U-shaped second grip 119 cannot be removed. The structure may be a support, in which case there is no risk of losing the second grip 119. In the embodiment shown in FIG. 18, the U-shaped second grip 119 is arranged so that the opening faces the forward direction, whereas the U-shaped second grip 119 has the opening facing the backward direction. It may be the case that it is arranged in such a manner. Further, in the embodiment shown in FIG. 18, the second grip 119 is U-shaped, but the present invention is not limited to this, and may be V-shaped, square-shaped, concave-shaped, or the like.

(Embodiment 2)
In the first embodiment, as the carrier 100, the extension frame 130 is rotatably attached to the seat frame 120 or detachably attached, but the carrier of the present invention is the extension frame 130. The second wheel 20 which does not have the third wheel and is used as the rear wheel when ascending or descending a step may be used as the rear wheel even when moving in a plane.

FIG. 19 is a plan view showing the carrier 300 having such a configuration, FIG. 19 (a) shows the state of the carrier when moving in a plane, and FIG. 19 (b) shows the state of the carrier when moving up and down. Shown.

This carrier 300 is a modified example of the carrier 100 of the first embodiment, and the third wheel 30, the extension frame 130, and the like in the carrier 100 are removed. Other than that, the structure is the same as that of the carrier 100 of the first embodiment. Therefore, the same components as those shown in FIGS. 1 to 18 are given the same reference numbers, and the description thereof will be omitted.

In such a carrier 300, the second wheel 20, which is used as the rear wheel when ascending or descending a step, is used as the rear wheel when moving in a plane (FIG. 19A). As shown in FIG. 19A, since there is no third wheel as compared with the first embodiment, the rear frame 110 and the seat frame 120 during the plane movement are larger in the rear than in the state in the first embodiment. It is tilted. The state of the carrier when ascending and descending (FIG. 19 (b)) is the same as the state of the carrier in the first embodiment. Therefore, the posture of the object placed on the carrier changes significantly when moving from the plane to the ascending / descending or from the ascending / descending to the plane, and the carrier of the first embodiment is superior in terms of riding comfort. ing. However, the carrier of the second embodiment does not require an extension frame 130, a third wheel 30, and a member for supporting the extension frame 130, and is excellent in that the structure can be simplified, and it is necessary to consider riding comfort and the like. It is suitable for carrying luggage without a wheel.

In the carrier 300 having such a configuration, the portion of the side frame pieces 111a and 111b of the back frame 110 that is closer to the wheel side than the position where the side frame pieces 121a and 121b of the seat surface frame 120 are pivotally supported. The part closer to the wheel side than the position where the side frame pieces 111a and 111b of the back frame 110 of the side frame pieces 121a and 121b of the seat surface frame 120 are pivotally supported can be expanded and contracted. With this configuration, the posture of the carrier 300 can be set to a posture suitable for step up and down when going up and down a step, and a posture suitable for flat movement when moving in a plane.

As described above, the present invention has been illustrated using the preferred embodiment of the present invention, but the present invention should not be construed as being limited to this embodiment. It is understood that the invention should be construed only by the claims. It will be understood by those skilled in the art that from the description of specific preferred embodiments of the present invention, an equivalent range can be implemented based on the description of the present invention and common general technical knowledge. It is understood that the references cited herein should be incorporated as reference to the present specification in the same manner that the content itself is specifically described herein.

INDUSTRIAL APPLICABILITY The present invention is useful in the field of a carrier and its usage, as it is possible to obtain a carrier and its usage that can move up and down steps such as stairs without labor while carrying luggage or a person. ..

10 First wheel (front wheel)
20 Second wheel (rear wheel for raising and lowering and / or rear wheel for plane movement)
30 Third wheel (rear wheel for plane movement)
40 Front wheel brake (first braking means)
50 Rear wheel brake (second braking means)
100 Carrier 110 Back frame 120 Seat frame 130 Extension frame

Claims (20)

1. A carrier that can move up and down steps
   With the back frame
   A seat frame that can be pivotally attached to the back frame around an axis in the left-right direction,
   It has an extension frame provided at the bottom of the seat frame.
   The lower part of the back frame has at least one first wheel.
   The lower part of the seat frame has at least one second wheel.
   A carrier having at least one third wheel at the bottom of the extension frame.
2. The first wheel and the third wheel are in contact with each other when moving on a plane, and the first wheel and the second wheel are in contact with each other when moving up and down a step. The carrier according to claim 1.
3. The carrier according to claim 2, wherein the second wheel is used as a fulcrum, and the step can be raised and lowered by moving the first wheel according to the principle of leverage.
4. The carrier according to any one of claims 1 to 3, wherein the extension frame is pivotally attached to the seat frame around an axis in the left-right direction.
5. The carrier according to any one of claims 1 to 4, wherein the back frame includes a first grip at the upper part.
6. The carrier according to any one of claims 1 to 5, wherein a second grip is provided on at least one of the back frame and the seat frame.
7. The carrier according to claim 6, wherein the second grip can adjust the length of protrusion in the forward direction or the backward direction.
8. The carrier is
   The first braking that switches between a braking state in which braking is applied only to the rotation of the first wheel in one of the forward and backward directions and a non-braking state in which braking is not applied to the rotation of the first wheel. Switching means and
   A second braking state that switches between a braking state in which braking is applied only to the rotation of the second wheel in one of the forward and backward directions and a non-braking state in which braking is not applied to the rotation of the second wheel. The carrier according to any one of claims 1 to 7, further comprising a switching means.
9. The first braking switching means is
   The first axle that supports the first wheel and
   Including the first braking means for braking the first axle,
   The second braking switching means is
   A second axle that supports the second wheel,
   The carrier according to claim 8, further comprising a second braking means for braking the second axle.
10. The first and second braking switching means can rotate the first wheel and the second wheel in the backward direction while the first axle and the second axle are braked, respectively. The carrier according to claim 9, further comprising a one-way clutch mechanism that prevents rotation in the forward direction.
11. A claim 8 subordinate to claim 5 and a claim 8 subordinate to claim 5, wherein the first grip includes the first braking switching means and a brake lever capable of operating the second braking switching means. The carrier according to any one of claims 9 and 10, which is subordinate to the above.
12. The second grip includes the first braking switching means and the brake lever capable of operating the second braking switching means, claim 8 according to claim 6 and claim 7 depending on claim 6. 8 subordinate to claim 8, claim 9 or 10 subordinate to claim 8 subordinate to claim 6, claim 9 or claim subordinate to claim 8 subordinate to claim 6 Item 2. The carrier according to any one of items 10.
13. The carrier according to any one of claims 1 to 12, which carries a person or luggage.
14. It is a method of using a carrier that can move up and down steps.
    The carrier is
    With the back frame
    Seat frame and
    It has an extension frame provided at the bottom of the seat frame.
    The lower part of the back frame has at least one first wheel.
    The lower part of the seat frame has at least one second wheel.
    The lower part of the extension frame has at least one third wheel.
    The method is
    Switching between the first posture in which the first wheel and the third wheel touch the ground and the second posture in which the first wheel and the second wheel touch the ground
    To translate the carrier in the first posture and
    By rotating the frame with one of the first wheel and the second wheel as a fulcrum so that the carrier moves up and down the step in the second posture, the other wheel is made of the step. A method that includes raising the wheel or lowering it below the step.
15. The carrier is
    The first braking that switches between a braking state in which braking is applied only to the rotation of the first wheel in one of the forward and backward directions and a non-braking state in which braking is not applied to the rotation of the first wheel. Switching means and
    A second braking state that switches between a braking state in which braking is applied only in one of the forward and backward rotations of the second wheel and a non-braking state in which braking is not applied to the rotation of the second wheel. Equipped with a switching means,
    When the step is raised by moving the carrier in the backward direction, the first wheel can be moved only in the backward direction of the forward direction and the backward direction of the carrier. The method according to claim 14, wherein the second wheel is brought into the braking state by the first braking switching means and the second braking switching means, respectively.
16. A carrier that can move up and down steps
    With the back frame
    Seat frame and
    Have,
    The lower part of the back frame has at least one first wheel.
    The lower part of the seat frame has at least one second wheel.
    The back frame is pivotally attached to the seat frame around an axis in the left-right direction.
    A carrier whose distance between the left-right axis and the first wheel is longer than the distance between the left-right axis and the second wheel.
17. The ratio of the distance between the left-right axis and the first wheel and the distance between the left-right axis and the second wheel is about 1.2: 1 to about 2.4: 1. Item 16. The carrier according to item 16.
18. The carrier according to claim 16 or 17, wherein the intersection angle between the back frame and the seat frame on the axis in the left-right direction is about 90 ° ± 5 °.
19. The invention according to any one of claims 16 to 18, wherein the step can be raised and lowered by moving the first wheel by using the second wheel as a fulcrum and moving the first wheel according to the principle of leverage. Carrier.
20. The carrier is
    The first braking that switches between a braking state in which braking is applied only to the rotation of the first wheel in one of the forward and backward directions and a non-braking state in which braking is not applied to the rotation of the first wheel. Switching means and
    A second braking state that switches between a braking state in which braking is applied only to the rotation of the second wheel in one of the forward and backward directions and a non-braking state in which braking is not applied to the rotation of the second wheel. The carrier according to any one of claims 16 to 19, further comprising a switching means.

Images