JP2001178778A - Frame of stretcher and connecting structure therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve rigidity of a bending place, and improve durability. SOLUTION: This frame is provided with a single core material 17 penetrating through a bending place 12 and sleeves 18 to 20 rotatably fitted in the core material 17, a vertical pipe 2a of a back part is fixed to the sleeve 18, a vertical pipe 3a of a waist part is fixed to the sleeve 19, and a vertical pipe 6a of an armrest part is fixed to the sleeve 20 so that the back part, the waist part and the armrest part can be bent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a frame connecting structure of a bendable stretcher. Also, the present invention
The present invention relates to a stretcher frame that can be transformed into a chair.

[0002]

2. Description of the Related Art There are a stretcher which can raise a back portion in accordance with a posture of a user and a stretcher which can be transformed into a chair with wheels by raising a back portion and bending a leg portion. The frame of the stretcher is formed by assembling pipes, and the waist portion, the knee portion, and the like can be bent.

[0003] In a conventional stretcher frame, pipes to be connected are rotatably connected to each other by pins or the like. For example, at the waist portion of the frame, the right side pipe on the upper body side and the right side pipe on the lower body side, and the left side pipe on the upper body side and the left side pipe on the lower body side are separately rotatably connected by pins.

In a stretcher that can be transformed into a chair with wheels, an armrest that is unnecessary in the bed state is required in the chair state. Therefore, the armrest of another member removed in the bed state is transformed into a chair. The armrests, which had been lowered below the frame so that they would not be in the way of the bed, were deformed into chairs so that they would be lifted up.

[0005]

However, in the above-mentioned frame connecting structure, the right and left pipes and the left and right pipes are connected at the bent portion of the frame because the left and right pipes constituting the frame are separately and rotatably connected. The pipe was not connected and the rigidity of the frame was insufficient. Also, when connecting pipes with pins, holes are drilled at predetermined positions in the pipe and the pins are made to penetrate, so there is a risk that the holes may be enlarged and bent parts may be rattled by use, resulting in poor durability. I was

On the other hand, in a stretcher that can be transformed into a chair, it is necessary to use the armrest as a separate member after it has been transformed into a chair, or lift the armrest that has been lowered out of the way. Therefore, the work was troublesome and the usability was poor. In addition, if the part which becomes the armrest in the chair state can be used even in the bed state, the bed surface is widened and the usability as a stretcher is improved.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stretcher frame connecting structure which can improve the rigidity of a bent portion and has excellent durability.

Another object of the present invention is to provide a stretcher frame which is excellent in usability and allows a wider bed surface.

[0009]

In order to achieve the above object, according to the first aspect of the present invention, a plurality of spaced apart members are rotatable with respect to a plurality of spaced apart members. In a frame connecting structure of a stretcher which can be connected and bendable at a bending portion where these connecting positions are coaxially arranged, one core material penetrating the bending portion and rotatably fitted into the core material And a bent portion is fixed to the sleeve.

[0010] Therefore, the rotation of the sleeve around the core material causes a bent portion such as a back or leg portion to be caused or fallen down. For example, the back and leg portions have members arranged to be separated from each other in the left and right directions. In a structure in which these components are separately connected to each other, the right and left sides are independent, so the rigidity of the frame is insufficient. On the other hand, in the present invention, since the core material passes through the bent portion of the frame, deformation such as twisting is prevented.

Further, in the frame connecting structure of the stretcher according to the present invention, a plurality of sleeves are rotatably fitted to a core material, and a plurality of bent portions are fixed to different sleeves.

Therefore, a plurality of bent portions can be bent around the core material. For example, the back, waist, and armrests of the frame can be flexibly connected to each other.

Further, in the frame connecting structure of the stretcher according to the third aspect, the total length of all the sleeves fitted to the core material is set to substantially the same value as the entire length of the core material, and the flange member for retaining the sleeve is provided. It is attached to the end face of the core material.

Therefore, after the sleeve is fitted to the core material at the time of assembling the frame, by attaching flange members to both ends of the core material, the portions to be bent are connected. The sleeve is supported by the flange member and does not come off the core material. Since the entire length of all the sleeves and the entire length of the core are substantially the same, the sleeve does not rattle in the axial direction of the core.

According to a fourth aspect of the present invention, a chair can be deformed into a chair shape by being attached to a trolley, being divided into an upper knee portion, a waist portion, an armrest portion, and a link portion, and changing the positional relationship between them. In the stretcher frame,
A part of the waist part and a part of the link part are swingably connected to the bogie, and in side view, a connecting part of the waist part and the armrest part, a connecting part of the armrest part and the link part, and a connecting part of the link part and the bogie. And a parallelogram having four vertices at the connection point between the bogie and the waist portion, while the parallelogram is collapsed by tilting the waist portion backward, and the four portions are arranged on the same plane, By raising the waist part forward, the parallelogram is restored and the armrest part is lifted.

Therefore, when the waist is tilted backward,
Since the parallelogram is crushed into a straight line, the whole including the armrest is flat. On the other hand, when the waist is raised forward, the collapsed parallelogram is restored, and the armrest is automatically lifted in conjunction with the movement of the waist.

The frame of the stretcher according to the fifth aspect is provided with a lock mechanism for fixing the shape of the parallelogram.

Therefore, when the waist is raised or tilted in a state where the lock mechanism is released, the shape of the parallelogram changes, and the parallelogram can be transformed into a stretcher state or a chair state. When the locking mechanism is locked, the shape of the parallelogram is fixed, and the angle of the frame is locked.

Further, in the frame of the stretcher according to the present invention, the support member and the lock mechanism are respectively arranged on the left and right sides of the bogie, and a luggage accommodation space is provided between the above-knee portion and the waist portion and the bogie. . A tray, a basket, and the like can be installed in the luggage storage space, and nursing care articles and the like can be carried and carried.

Further, according to the present invention, there is provided a stretcher frame which is supported on a bogie so that an angle can be adjusted, and wherein the adjusted angle can be fixed by a lock mechanism.
A plurality of lock mechanisms are provided, each of which is mounted at a different mounting angle with respect to the ground plane.

When the lock mechanism is extended, the rigidity for fixing the angle of the frame tends to be weak.
By installing a plurality of lock mechanisms at different angles, all the lock mechanisms do not extend simultaneously, and rigidity for fixing the angle of the frame is always ensured.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail based on the best mode shown in the drawings.

FIGS. 1 to 5 show an example of a stretcher frame to which the frame connection structure of the present invention is applied. A cushion material 27 is attached to the frame 1.
This stretcher can be transformed into a chair with wheels by folding, and the frame 1 has four wheels 1
1b.

In the frame 1, for example, a back portion 2, a waist portion 3, an upper knee portion 4, a lower knee portion 5, and an armrest portion 6 can be bent together. The back portion 2 includes two vertical pipes 2a to which the headrest 7 is attached, and these vertical pipes 2a.
a are connected to each other.
The waist portion 3 includes two vertical pipes 3a and these vertical pipes 3a.
and a horizontal pipe 3b that connects the pipes a and b. The above-knee portion 4 is composed of a U-shaped pipe 4a bent into a U-shape. The lower knee portion 5 includes two vertical pipes 5a to which the footrest 8 is attached, and these vertical pipes 5a.
And a U-shaped pipe 5c fixed on a sleeve 29 which supports the vertical pipe 5a from below and is coaxially arranged with the sleeve 28. The armrest part 6 is constituted by vertical pipes 6a provided one by one on the left and right. Brackets 9 and 10 are fixed to the lateral pipe 3b of the waist portion 3 and the U-shaped pipe 5c of the lower knee portion 5, respectively.
10 is rotatably connected to the support arm 11a of the cart 11.

The back portion 2, the waist portion 3 and the armrest portion 6 are connected by a first bent portion 12 so as to be bendable. Here, the first bent portion 12 is composed of a plurality of members arranged apart from each other, in this embodiment, the right vertical pipes 2a, 3a, 6a.
And the connection position of the left vertical pipes 2a, 3a, 6a are coaxially arranged.

The waist portion 3 and the above-knee portion 4 are connected by a second bent portion 13 so as to be bendable. here,
The second bent portion 13 includes a plurality of members that are separated from each other,
In the present embodiment, the right vertical pipe 3a and the U-shaped pipe 4a
Is a position where the connection position between the right end of the left side and the left end of the left vertical pipe 3a and the left end of the U-shaped pipe 4a is coaxially arranged. The second bent portion 13 is connected to the support arm 11a of the carriage 11 by a lock device 15.

Further, the vertical pipe 6a of the armrest portion 6 and the U-shaped pipe 5c of the below-knee portion 5 are connected to a joint 14 which can be bent.
Are linked by The U-shaped pipe 4a of the upper knee portion 4 is mounted on and supported by a horizontal pipe 5b above the lower knee portion 5. A guard 16 for preventing falling is attached to the vertical pipe 6a of the armrest 6 so as to be able to raise and lower.

FIG. 6 shows the frame connection structure at the first bent portion 12 in detail. The first bent portion 12 connects a plurality of bent portions, that is, the back portion 2, the waist portion 3, and the armrest portion 6 so as to be able to be bent.
And a first to third sleeves 18 to 20 rotatably fitted into the core material 17. The back portion 2 is attached to the first sleeve 18, and the second sleeve 19 to the waist portion 3 and the third sleeve 20 to the armrest portion 6
Are respectively fixed.

At the first bent portion 12, one first sleeve 18, a second sleeve 19 and a third sleeve 20
Are provided two by two, and a first sleeve 18 is provided at the center of the core 17.
On both sides of the first sleeve 18.
The third sleeve 20 is arranged on both sides of the second sleeve 19. The vertical pipe 2a of the back part 2 is welded to the first sleeve 18, the vertical pipe 3a of the waist part 3 is welded to the second sleeve 19, and the vertical pipe 6a of the armrest part 6 is welded to the third sleeve 20. Has been fixed by. The total length of all these sleeves 18 to 20 is substantially the same as the total length of the core 17. In the present embodiment, the total length of all the sleeves 18 to 20 is made slightly shorter than the entire length of the core member 17 to make the rotation of the sleeves 18 to 20 smooth.

The core member 17 is, for example, a pipe (hereinafter referred to as a core pipe 17), and a sleeve 1 is provided on both end faces 17a.
Eight to twenty retaining flange members 21 are attached. That is, the nut 22 is, for example, plug-welded to the inner peripheral surface of the end of the core pipe 17. End face 1 of core pipe 17
After the flange member 21 is fitted into 7a, the bolt 23 is passed through the flange member 21 and fastened to the nut 22, thereby fixing the flange member 21. Flange member 2
Reference numeral 1 is formed to have a slightly larger diameter than the core pipe 17 and functions as a stopper for preventing the sleeves 18 to 20 from coming off.

Since the sleeves 18 to 20 are rotatably fitted into the core pipe 17, the vertical pipes 2
a, the vertical pipe 3a of the waist portion 3 and the vertical pipe 6a of the armrest portion 6 rotate around the core pipe 17. Thereby, the back part 2, the waist part 3, and the armrest part 6 can be bent. Since the structure is such that the sleeves 18 to 20 are rotated with respect to the core pipe 17, the portions 2, 3, and 6 are smoothly bent. Also, depending on the use, the sleeve 18-2
There is no danger that the diameter of 0 will increase, and the structure that bends each portion 2, 3, 6 has excellent durability. In addition, core pipe 1
7 penetrates through the first bent portion 12, so that the portions 2, 3, and 6 are connected to each other in a bendable manner, and the right vertical pipes 2a, 3a, 6a and the left vertical pipe 2
Since a, 3a, and 6a are connected, rigidity near the first bent portion 12 is increased, and deformation of the frame 1 such as twisting can be prevented. In particular, since it is possible to use a somewhat thick core pipe 17, it is easy to secure the rigidity required for the frame 1.

The second bent portion 13 can be bent in the same structure as the first bent portion 12. That is, although not shown, one core pipe also penetrates through the second bent portion 13, and a sleeve 24 to which the vertical pipe 3 a of the waist portion 3 is fixed is attached to the core pipe, and a portion above the knee. A sleeve 25 to which the fourth U-shaped pipe 4a is fixed is rotatably fitted. A sleeve 26 to which the lock device 15 is rotatably mounted is also rotatably fitted into the core pipe. Therefore, similarly to the first bent portion 12, the second bent portion 13 is smoothly bent, and is excellent in durability and rigidity.

The sleeve 28 and the sleeve 29 of the below-knee portion 5 are rotatably fitted in a core pipe (not shown) like the first and second bent portions 12 and 13, and the vertical pipe 5a is It can be bent upward with respect to the character pipe 5c.

This stretcher can be transformed into a chair with wheels by bending the frame 1 as shown in FIGS.

The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the gist of the present invention. For example, in the above description, the first and second bent portions 12 and 13 having a plurality of bent portions are taken as an example, but the number of bent portions may be one. For example, the relationship between the back portion 2 and the waist portion 3 of the first bent portion 12 will be described as an example. Assuming that the core pipe 17 is fixed to the waist portion 3, the first sleeve 18 is attached to the core pipe 17. By fitting, the back portion 2 can be bent with respect to the waist portion 3.

In the first bent portion 12, the core pipe 1
Although the three parts 2, 3, and 6 were bent around the center 7, the two parts may be bent.
Further, four or more portions may be bent.

Further, the core pipe 17 is made to penetrate in the width direction of the frame 1 and the portions (the back portion 2, the waist portion 3, and the armrest portion 6 at the first bending portion 12) disposed before and after the core pipe 17 are bent. However, it goes without saying that the core pipe 17 may be arranged in the front-rear direction of the frame 1 and the left and right portions thereof may be bent.

Furthermore, although a description has been given of an example in which a stretcher is transformed into a chair with wheels as a stretcher, it is needless to say that the present invention may be applied to a stretcher other than a stretcher transformed into a chair with wheels.

Next, the frame of the stretcher of the present invention will be further described with reference to FIGS. FIG.
FIG. 10 shows the frame of the stretcher shown in FIGS. 1 to 5 in a simplified form for the sake of explanation. The description of the cushion member 27 and the like is omitted, and the same members are denoted by the same reference numerals. is there.

The stretcher frame 1 shown in FIGS. 7 to 10 has a structure in which the back portion 2 and the waist portion 3 are not bent in order to make the description easy to understand. 2 c and the vertical pipe 3 a of the waist portion 3 are fixed to the same sleeve 33. The lock devices 15 provided on the left and right are installed at different angles from each other. Furthermore, the left and right sleeves 26 provided at the second bent portion 13 are not rotatable with respect to the left and right sleeves 25, respectively, and are above the knee with respect to the core pipe at the second bent portion 13. The U-shaped pipe 4a of the portion 4 and the sleeve 26 are integrally rotated.

The frame 1 has an upper knee portion 4 and an upper knee portion 4.
A waist portion 3 connected to the waist portion 3 so as to be bendable, an armrest portion 6 connected to the waist portion 3 so as to be able to bend, and a U-shaped pipe 5c which is a link portion connected to the armrest portion 6 so as to be bendable. Have. That is, in the present embodiment, the U-shaped pipe 5c of the below-knee portion 5 is a link portion. The connection point between the above-knee portion 4 and the waist portion 3 is a second bent portion 13. The connection between the waist portion 3 and the armrest portion 6 is a first bent portion 12. The joint between the U-shaped pipe 5c and the armrest 6 is a joint 14. Further, the U-shaped pipe 4a of the upper knee portion 4 is slidable in the front-rear direction with respect to the sleeves 28 and 29 of the lower knee portion 5. That is, the sleeve 28 on which the U-shaped pipe 4a is placed,
Point 32 on 29 is a slidable connection point.

The frame 1 has a first bent portion 12 which is a connecting portion between the waist portion 3 and the armrest portion 6, and an armrest portion 6 and a U-shaped portion viewed from the side, that is, from the direction shown in FIG.
A parallelogram having four vertices, a joint 14 which is a connection point of the U-shaped pipe 5c, a fulcrum B which is a connection point of the U-shaped pipe 5c and the trolley 11, and a fulcrum A which is a connection point of the trolley 11 and the waist portion 3. Make up the shape.

The waist portion 3 and the U-shaped pipe 5c are swingably connected to a support arm 11a, which is a support member provided on the carriage 11, and the angle adjusted by swinging is fixed, that is, as described above. The lock device 15 is provided as a lock mechanism for fixing the shape of the parallelogram. That is, the shape of the frame 1 is kept constant by the lock device 15 as a lock mechanism.

As shown in FIGS. 11 and 12, the support arms 11a are provided on the left and right sides of the carriage 11. Further, the lock devices 15 are also arranged on the left and right sides of the cart 11. Therefore, the space between the upper knee portion 4 and the waist portion 3 and the cart 11 becomes the luggage accommodation space 31. This storage space 3
By installing a tray, a basket, and the like (not shown) in 1, it is possible to carry change of clothes, nursing care articles, and the like.

Of the two lock devices 15, the distal end of the left lock device 15 is rotatable with respect to the extension 11c formed on the support arm 11a, and the base end is the second bent portion 1
3 is rotatably attached to an extension 26a formed on the left sleeve 26. Further, the tip of the right locking device 15 is located at the second sleeve 13 at the second bent position 13.
A bracket 36 pivotally attached to the carriage 11 at a base end thereof so as to be rotatable with respect to the extension portion 26 a formed at the base 6.
It is fixed to. That is, the left locking device 15 is mounted substantially horizontally, and the right locking device 15 is mounted substantially vertically. By making the mounting angles of the left and right locking devices 15 largely different in this way, even if the angle of the frame 1 is changed, the two locking devices 15 will not be fully extended at the same time. The other locking device 15 can always be reduced to some extent.

The lock device 15 is a so-called mechanical lock device. The lock device 15 restrains the rod by tightening a coil spring wound around the rod, and positions the rod. The operation is performed by operating a lever connected to the coil by a wire. By operating the lever, the expansion and contraction of the two lock devices 15 can be simultaneously prohibited or enabled.

In the frame 1, when the waist portion 3 is tilted backward, the above-described parallelogram is crushed and the four portions 3, 4,
5c and 6 are arranged on the same plane, while raising the waist portion 3 forward, the above-described parallelogram is restored and the armrest portion 6 is lifted. Therefore, as shown in FIG. 7, the stretcher can be used as a chair with armrests.

From this state, as shown in FIG.
When the is folded backward, the above-described parallelogram is crushed, and when the waist portion 3 is laid down as shown in FIG. 9, the upper knee portion 4 is aligned with the waist portion 3 in a straight line when viewed from the side, The armrest portion 6 and the U-shaped pipe 5c are also aligned and overlap the waist portion 3 and the above-knee portion 4. Because of this, the bed surface is
And a flat stretcher. Further, since the armrest portions 6 are located on both sides of the waist portion 3 and the above-knee portion 4, the bed surface of the stretcher can be widened.

From this state, the waist portion 3 and the back portion 2
Is raised forward, the above-described parallelogram is restored, and the armrest portion 6 is lifted almost horizontally, and is transformed into a chair with armrests.

Here, the swing center of the waist portion 3 with respect to the support arm 11a is defined as a fulcrum A, and the swing center of the U pipe 5c with respect to the support arm 11a is defined as a fulcrum B. If the distance from the point A to the second bent portion 13 is L1, and the distance from the point A to the tip of the back portion 2 is L2, the ratio of the distance between L1 and L2 is, for example, 1: 5. . When the waist portion 3 and the back portion 2 are raised forward, usually, the tip of the back portion 2 is grasped and lifted. Distance L2 is distance L
Because it is about five times longer than 1, the lever principle allows the waist portion 3 and the back portion 2 to be raised with relatively light force even if a person is lying on the stretcher.

When the waist portion 3 and the back portion 2 are raised to a certain height and the waist portion 3 is bent with respect to the above-knee portion 4, the positions of the second bent portions 13 are point A and point B. , The waist portion 3 and the above-knee portion 4 are inclined. For this reason, the body of the person sleeping on the stretcher is bent so as to fall toward the second bent portion 13 from a state where the body is stretched horizontally and straight, and its weight acts in a direction to lower the second bent portion 13. I do. For this reason, after raising the waist portion 3 and the back portion 2 to a certain height, the waist portion 3 and the back portion 2 can be raised with a lighter force.

The angle adjustment of the frame 1 is performed in an unlocked state in which the two lock devices 15 can be expanded and contracted by lever operation. After swinging the waist portion 3 and the back portion 2 to a desired height, the angle of the frame 1 is fixed, that is, the frame 1 is locked by prohibiting expansion and contraction of the two lock devices 15 by lever operation. be able to.

In the state of the chair shown in FIG. 7, the lock device 15 on the left side is extended. When the lock device 15 is extended, it is difficult to obtain a large rigidity with respect to the lock of the frame 1. On the other hand, if the lock device 15 is contracted, the frame 1
It is easy to obtain great rigidity for the lock. In the state of the chair shown in FIG. 7, the lock device 15 on the left side is extended, but the lock device 15 on the right side is contracted, so that sufficient rigidity to lock the frame 1 can be obtained. Similarly, in the state of the stretcher shown in FIG. 9, the right lock device 15 is extended, but the left lock device 1 is extended.
Since 5 is contracted, sufficient rigidity to lock the frame 1 can be obtained. That is, two lock devices 1
By changing the mounting angle of 5, a sufficient lock rigidity can always be obtained.

Further, by providing two locking devices 15, the reliability of locking the frame 1 is improved as compared with the case of one locking device. That is, since the lock device 15 can secure a certain degree of lock rigidity even if it is extended, the frame 1 includes two lock devices 15 that can perform frame lock. And
Since it is unlikely that the two lock devices 15 fail at the same time, the reliability against the failure is improved.

The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the gist of the present invention. For example, the supporting arm 11a is provided on the cart 11, and the frame 1 is swingably supported at two points A and B by the supporting arm 11a. However, as shown in FIGS. The frame 1 may be swingably supported at two points A and B by the eleventh frame 11d.

Further, the frame 1 may be tilted as a whole. For example, as shown in FIG. 15, the support shaft 34 and the crank lever 35 may be attached to the main body of the bogie 11 at a predetermined interval, and the support arm 11a may be attached to the tip of the support shaft 34 and the crank lever 35.

The crank lever 35 is swingable with respect to the main body of the cart 11. Also, the crank lever 35
A connecting pin 36 that penetrates a long hole 38 formed in the support arm 11a is fixed to the tip of the support arm 11a. On the other hand, the base end of the crank lever 35 is connected to a damper 37 that is swingably attached to the main body of the cart 11. Therefore, the support arm 11a swings the crank lever 35 while expanding and contracting the damper 37, and swings about the support shaft 34. In the example of FIG. 15, the support arm 11a swings so as to lower the point A and raise the point B from the horizontal state. That is, when the frame 1 is transformed into a chair state, the entire frame 1 can be slightly inclined rearward. Therefore, the stability of the body of the person sitting on the stretcher in the chair state is improved. In addition, you can sit down with your entire body, so you can relax more.

[0058]

As described above, the frame connecting structure of the stretcher according to the first aspect includes one core material penetrating the bent portion, and a sleeve rotatably fitted to the core material. Since the portion to be bent is fixed to the sleeve, the rigidity of the bent portion can be improved.
Also, since there is no danger of the sleeve expanding due to its use,
The durability is improved. That is, the rigidity and durability of the frame can be improved while ensuring a smooth bending operation of the bent portion.

Further, in the frame connecting structure of the stretcher according to the second aspect, a plurality of sleeves are rotatably fitted to the core material and a plurality of bent portions are fixed to different sleeves. The rigidity and durability of the frame can be improved while smoothly bending a plurality of bent portions such as a portion, a waist portion, and an armrest portion.

Further, in the frame connecting structure of the stretcher according to the third aspect, the total length of all the sleeves fitted to the core material is set to substantially the same value as the entire length of the core material, and the flange member for preventing the sleeve from coming off is provided. Since it is attached to the end face of the core material, it is possible to connect the parts to be bent simply by fitting the sleeve into the core material and attaching the flange member. For this reason, productivity can be improved and costs can be suppressed. Further, since the total length of the sleeve and the total length of the core material are substantially the same value, the axial positioning of the sleeve can be performed only by attaching the flange member, and the play at the bent portion can be suppressed. .

Further, in the stretcher frame according to the fourth aspect, the midway of the waist portion and the midway of the link portion are swingably connected to the bogie, and the connecting portion of the waist portion and the armrest portion, and the armrest portion in side view. And the linking part of the link part,
Construct a parallelogram with four vertices at the connection point between the link part and the bogie, and the connection point between the bogie and the waist part. When the waist part is tilted backward, the parallelogram is crushed and the four parts are in the same plane. While being placed on the upper side, raising the waist part forwards restores the parallelogram and raises the armrest, so in the stretcher state, the entire bed surface including the armrest part can be flat, and the bed surface Can be widened. In addition, since the armrest can be lifted almost horizontally just by raising the waist forward, there is no need to lift or attach the armrest separately from the operation of raising the waist, a stretcher that can be transformed into a chair Usability is improved.

In the stretcher frame according to the fifth aspect, since the lock mechanism for fixing the shape of the parallelogram is provided, the frame can be fixed at an arbitrary angle by operating the lock mechanism.

In the frame of the stretcher according to the sixth aspect, the support member and the lock mechanism are respectively disposed on the left and right sides of the cart, and the luggage accommodation space is provided between the above-knee portion and the waist portion and the cart. This makes it possible to load care products and the like on the stretcher, eliminating the need to carry the device separately and improving usability.

Furthermore, in the tretcher frame according to the seventh aspect, a plurality of lock mechanisms are provided, and are mounted at different mounting angles with respect to the grounding surface, so that all the lock mechanisms do not extend at the same time. Stiffness sufficient to always lock the frame can be ensured regardless of the angle of the frame.

[Brief description of the drawings]

FIG. 1 is a side view showing a frame of a stretcher to which a frame connection structure of the present invention is applied.

FIG. 2 is a view of the frame as viewed from a headrest side.

FIG. 3 is a bottom view of the frame.

FIG. 4 is a side view showing a state where the frame is transformed into a chair with wheels.

FIG. 5 is a rear view of the state where the frame is transformed into a chair with wheels.

FIG. 6 is an enlarged sectional view showing a frame connection structure of the present invention.

FIG. 7 is a side view showing a frame of the stretcher to which the present invention is applied, which is deformed into a chair with wheels.

FIG. 8 is a side view showing a state in which the frame is being transformed from a chair with wheels state to a stretcher state.

FIG. 9 is a side view showing a stretcher state of the frame.

FIG. 10 is a plan view showing a stretcher state of the frame.

FIG. 11 is a plan view showing a cart supporting the frame.

FIG. 12 is a side view showing a truck supporting the frame.

FIG. 13 is a side view showing a modified example of a truck supporting the frame.

FIG. 14 is a plan view showing a modified example of a truck supporting the frame.

FIG. 15 is a conceptual diagram showing another modified example of the cart supporting the frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 2 Back part (part to be bent) 3 Waist part (part to be bent) 4 Above knee (part to be bent) 5c U-shaped pipe (link part) 6 Armrest part (part to be bent) 11 dolly 11a Support arm (support member) 12, 13 Bending point 15 Lock device (lock mechanism) 17 Core pipe (Core material) 18-20, 24-26 Sleeve 21 Flange member 31 Luggage storage space

Claims (7)

[Claims] 1. A plurality of spaced apart members are rotatably connected to a plurality of spaced apart members, and these connecting positions are folded at coaxially arranged bending points. In the frame connecting structure of the bendable stretcher, it is provided that one core material penetrating the bent portion and a sleeve rotatably fitted to the core material, and a portion to be bent is fixed to the sleeve. Characteristic stretcher frame connection structure. 2. The stretcher frame connection structure according to claim 1, wherein a plurality of sleeves are rotatably fitted in the core material, and a plurality of bent portions are fixed to different sleeves. 3. The total length of all the sleeves fitted in the core material is set to substantially the same value as the entire length of the core material, and a flange member for preventing the sleeve from coming off is attached to an end face of the core material. The frame connection structure for a stretcher according to claim 1 or 2, wherein: 4. A stretcher frame attached to a trolley, which is divided into an upper knee portion, a waist portion, an armrest portion, and a link portion and which can be deformed into a chair shape by changing their positional relationship, wherein the waist portion is provided. And the middle of the link portion are swingably connected to the bogie, and in a side view, the connecting portion of the waist portion and the armrest portion, the connecting portion of the armrest portion and the link portion, and the connecting portion of the link portion and the bogie. The connection point and the connection point of the bogie and the waist portion constitute a parallelogram having four vertices, and the parallelogram is crushed by tilting the waist portion backward, so that the four portions are on the same plane. A frame for a stretcher, wherein the parallelogram is restored by raising the waist portion forward, and the armrest portion is lifted. 5. The stretcher frame according to claim 4, further comprising a lock mechanism for fixing the shape of the parallelogram. 6. The vehicle according to claim 5, wherein the support member and the lock mechanism are respectively disposed on both left and right sides of the truck, and a luggage accommodation space is provided between the above-knee portion and the waist portion and the truck. Stretcher frame. 7. A stretcher frame supported on a cart so that the angle can be adjusted and the adjusted angle can be fixed by a lock mechanism, wherein a plurality of the lock mechanisms are provided, and each of the lock mechanisms is attached to a ground contact surface at a different attachment angle. A stretcher frame, characterized in that: