JP2000024037A - Folding stretcher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stretcher which can be easily assembled and folded and has no fear of pinching a finger in use. SOLUTION: A cloth is stretched between two rod support frames, each rod frame rotatably connects each one end of a pair of support rods 3, 4 to make both folded in only one direction at the connecting member 5 part respectively. In a folding stretcher made by such a manner, dent parts 3b, 4b are formed on at least mutually facing end faces of a pair of support rods 3, 4 and a lock member 6 which is slidable in the axial direction and can be protruded toward the dent part 4b of one support rod 4 is equipped on the dent part 3b of the other support rod 3. When the support rods 3, 4 are rotated around the connecting member 5 and linearly extended, the lock member 6 is protruded to be inserted into the dent part 4b of one support rod 4 to bridge the lock member 6 across both support rods 3, 4. Thus both support rods 3, 4 are integrated so as to constitute the rod support frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable stretcher. More specifically, the present invention relates to an improvement of a folding structure in a folding stretcher.

[0002]

2. Description of the Related Art As a stretcher 101 which can be stored compactly when not in use, there is, for example, a stretcher as shown in FIG. In this stretcher 101, the two pipes 10 on the left and right
The two pipes 102 and 102 have a structure that can be separated substantially in the middle, and are provided so that the end of one pipe 102 is inserted into the end of the other pipe 102 to be integrated when used.

[0003] The stretcher 101 which can be separated in this way has a simple structure, but has a face that it takes time to insert the pipe 102 during assembly, and the inserted pipe 102 does not come off when using the stretcher. Thus, a mechanism for preventing detachment for integrally fixing is also required.

[0004] Therefore, in order to eliminate such trouble, a foldable stretcher 111 capable of bending the pipe 112 substantially in the middle as shown in FIG. 9 has been developed. In this foldable stretcher 111, pipes 112a and 112b divided into half lengths are respectively attached to connecting members 114 with connecting pins 113, and the respective pipes 112a and 112b are connected to each other via the connecting members 114 so as to be rotatable with each other. Have been. Therefore, when not in use, the pipe 112
By folding the pipes a and 112b, the pipes 112a and 112b can be made usable as the stretcher 111 only by extending the pipes 112a and 112b in a straight line, and there is no need to insert the pipes.

[0005]

However, the stretcher 111 that can be folded in this way has a problem that a finger may be pinched during assembly or use depending on the folding structure. For example, since the pair of pipes 112a and 112b are connected at the connecting member 114 so as to be bent only in one direction, the pipe 112
If two people hold the stretcher by holding the grips 115, 115 at both ends of the pipe 112, the pipe 112 will be kept in a straight line, but if another person tries to lift by grabbing the middle connecting portion 114, the connecting member 114 The pipe 112 may bend and pinch a finger.

Accordingly, the present invention is compact and foldable and easy to assemble and fold.
Another object of the present invention is to provide a foldable stretcher in which fingers are not pinched during use or folding.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a fabric is stretched between two rod-shaped support frames, and each rod-shaped support frame has a pair of support members. In a foldable stretcher in which one end of each rod is rotatably connected to a connecting member so that the connecting member can be bent in only one direction, a concave portion is formed on at least the opposite end surfaces of the pair of support bars, and A lock member slidable in the axial direction in the concave portion of the support rod and protruding toward the concave portion of the other support rod, and locked when the support rods are respectively rotated around the connecting members and extended in a straight line. By projecting the member, inserting it into the recess of the other support rod, and arranging the lock member over both support rods,
The support rods are integrated to form a rod-shaped support frame.

In this case, when the lock member is not inserted into the recess of the other support rod and is in the unlocked position within the recess of its own support rod, each support rod is rotatable. When the lock members are inserted into the concave portions of the support rods on the other side and moved to the lock position where they are engaged when the rods are aligned, the two support rods are directly connected to each other for the lock member straddling between them, and are integrally formed. Can no longer be rotated. By maintaining such a locked state, it is possible to keep the rod-shaped support frame in a straight line, and to keep its shape during use. Therefore, even if the connecting member is lifted by mistake, the rod-shaped support frame does not bend.

According to a second aspect of the present invention, in the foldable stretcher according to the first aspect, a long hole extending in an axial direction is provided on a peripheral surface of one of the support rods, and the lock member passes through the long hole. A knob is provided, and the lock member is slid by operating the knob. In this case, the lock member can be easily moved in and out of the concave portion of the support rod by operating the knob.

According to a third aspect of the present invention, in the foldable stretcher according to the second aspect, a notch groove for turning the knob in the circumferential direction is provided on a tip end side of the end face of the long hole near the concave portion, and the knob is provided. By inserting the lock member into the notch groove, the lock member is prevented from sliding in the axial direction. In this case, the knob is slid into the notch groove in a state where the lock member is arranged so as to straddle between both support rods,
The movement of the lock member in the axial direction can be restricted. Moreover, in order to release the lock, two operations of rotating the lock member in the circumferential direction and then sliding the lock member in the axial direction must be performed sequentially, so that the lock is not accidentally released.

According to a fourth aspect of the present invention, there is provided the foldable stretcher according to any one of the first to third aspects, wherein the other end of the support rod is slidable inside the support rod and unlocked when the lock is unlocked. A cover member for closing the end is provided, and the cover member is constantly urged toward one of the support rods by a built-in urging means. Therefore, when the stretcher is not used, the lid member closes the opening at the end of the other support bar to prevent a finger or the like from being accidentally inserted, and allows the lock member to enter when the stretcher is used. Moreover, when the fixing of the lock member is released, the lock member is pushed back by the return of the lid member to the original position and is pushed out of the concave portion, so that the lock member is automatically removed.

According to a fifth aspect of the present invention, there is provided the folding stretcher according to any one of the first to fourth aspects.
The two rod-shaped support frames are connected to each other by a pair of support bars by a foldable horizontal connection frame, and when the horizontal connection frame extends the rod-shaped support frame in a straight line, the rod-shaped support frames are bent in the same direction and connected to each other. From each other. In this case, if the horizontal connecting frame is folded and the rod-shaped support frame is folded, the stretcher can be folded not only in the length direction but also in the width direction to be compact. In addition, since the folded horizontal connection frames face in opposite directions to each other, they can be stored with a minimum volume without interference.

According to a sixth aspect of the present invention, in the foldable stretcher according to any one of the first to fifth aspects, the rod-shaped support frame is provided with a leg for each support rod,
The positions of the legs are shifted from each other when the pair of support bars are bent at the connecting member. In this case, when the stretcher is folded, when the leg portions face each other between the bent rod-shaped support frames, they can be stored in a minimum volume without interference.

[0014]

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

1 to 7 show one embodiment of the foldable stretcher 1 of the present invention. As shown in FIG. 7, the foldable stretcher 1 includes a mounting portion (hereinafter, referred to as a cloth portion) 18 made of a cloth or the like on which a person to be conveyed is placed, and two supporting members, which support the left and right sides of the cloth portion 18, respectively. Rod-shaped support frame 2,
In the case of the present embodiment, the horizontal connecting frame 20 for connecting the left and right rod-shaped support frames 2, 2 and the legs 15 for floating the cloth portion 18 from the floor are necessary. It is provided.

As shown in FIG. 5, each of the rod-shaped support frames 2 has a pair of support rods 3 and 4 of the same length, and one end of each of the support rods 3 and 4 is rotatable so as to be bent only in one direction. And a connecting member 5 connected to the connecting member 5 so that the connecting member 5 can be bent or extended around the connecting member 5. The material and size of the support rods 3 and 4 are not particularly limited as long as the strength required for the stretcher can be secured. For example, in the case of the present embodiment, an aluminum pipe is used. However, the present invention is not limited to this, and a steel pipe, a wooden rod, or the like may be employed.

At least opposing end surfaces 3a, 4a of the support rods 3, 4 are provided with recesses 3b, 4b for incorporating the lock member 6. If pipe materials are used for the support rods 3 and 4 as in the present embodiment, the end openings can be used as recesses as they are.
There is an advantage that processing for forming b and 4b and preparation of separate members are not required. When a solid bar such as a wooden bar is used as a support bar, a cylindrical end fitting (not shown) for forming a recess for accommodating the lock member 6 is attached, When a hole is formed in the hole, a concave portion is formed.

As shown in FIGS. 1 to 3, one end of each of the support rods 3 and 4 is rotatably connected to the connecting member 5 by a connecting pin 10 made of, for example, a rivet. Are provided so as to be swingable. Here, the connecting member 5 has a U-shaped cross section as shown in FIG. 4 and arcuate cuts 5b, 5b for allowing the support rod to swing at both ends are provided as shown in FIG. . And each support rod 3, 4 and the connection member 5
When the connecting members 4 are rotated about the connecting pins 10 and 10 and extend in a straight line on the connecting member 5, the two ends are connected with an appropriate gap without opposing each other without interference. At this time, the pair of support rods 3, 4 extending in a straight line has their rotation range limited because the portions ahead of the connection pins 10, 10 abut against the bottom 5 a of the connection member 5. Each can be bent only in one direction. The means for fastening each of the support rods 3, 4 and the connecting member 5 is not limited to the above-mentioned rivet, and a detachable fastening means such as a combination of a bolt and a nut may be employed.

A lock member 6 for fixing these support rods 3 and 4 in a straight line is provided in one support rod, for example, a concave portion 3b at the end of the support rod 3. As shown in FIGS. 1 and 2, the lock member 6 is a rod-shaped member that is slidably accommodated in the concave portion 3b of one of the support rods 3 in the axial direction. , 4) may be solid or hollow as long as it can withstand the bending stress applied thereto, and the material is not particularly limited. The lock member 6 in the present embodiment is slidable manually without being urged particularly in the axial direction. However, the present invention is not limited to this. You may make it urge so that it may protrude. The beveling or partial tapering of the distal end surface of the lock member 6 facilitates the insertion of the other support rod 4 into the concave portion 4b, and inadvertent injury to the user's finger or the like. This is a preferred process because it reduces the risk of incurring the following.

A sliding groove 6c as shown in FIG. 1 is provided at the rear end of the lock member 6, that is, at a portion which comes into contact with the connecting pin 10 which is the center of rotation. The sliding groove 6c engages with the connecting pin 10 to function as a guide when the locking member 6 is slid in the axial direction, and to prevent the locking member 6 from being pulled further deeper than the unlocked position. Regulating.

The lock member 6 is provided with a knob 9. The knob 9 is screwed into the lock member 6 housed in the concave portion 3b so as to pass through the elongated hole 7 from outside the support rod 3. For example, a screw hole (not shown) is provided in the lock member 6, and the knob 9 is attached by screwing a male screw at the lower part of the neck of the knob 9 into the screw hole. The knob 9 has a slot 7 under the neck.
The position of the lock member 6 is regulated by contacting the edge of the lock member 6. However, in some cases, the support rod 3 may be sandwiched and fixed between the lock member 6 and the knob 9 by tightening a screw. . When the lock member 6 is fixed by screwing the knob 9, the lock member 6 can be fixed at any position, not limited to the locked position or the unlocked position.

A long hole 7 formed in the peripheral surface of the support rod 3
In the case of the present embodiment, has a length in the axial direction corresponding to the stroke length of the lock member 6 and has a front end or end surface 3.
A notch groove 8 for turning the knob 9 in the circumferential direction is provided at the end closer to a. That is, the long hole 7 and the cutout groove 8 form an L-shaped groove as a whole. Therefore, by moving the knob 9 to the end of the long hole 7 and then inserting the knob 9 into the notch groove 8, the sliding of the lock member 6 in the axial direction is restricted, and the locked lock member 6 is unexpectedly locked. Can be avoided. In addition,
When the folding stretcher 1 is used, the long hole 7 is provided with the knob 9 shown in FIG.
And the knob 9 can be moved without interfering with the connecting member 5.

The lock member 6 is preferably provided so as not to move in the axial direction even in the unlocked position. For example, a notch groove (not shown) in the circumferential direction similar to the notch groove 8 is also provided at the far end of the long hole 7, and the knob 9 is engaged with the notch groove to make it impossible to slide, or the lock is not locked. A method of turning the knob 9 in the position and tightening it to prevent the movement may be used.

As shown in FIG. 2, a cover member 13 slidable in the recess 4b and a biasing means 14 for biasing the cover 13 are provided in the recess 4b at the end of the other support rod 4. . The lid member 13 has a cylindrical shape with a bottom having a diameter slightly smaller than the inner diameter of the support rod 4, and except when the lock member is inserted.
And the bottom of the lid member 13 are flush with each other by the biasing means 14 so that the recess 4b is closed. In this embodiment, when the urging means 14 has a natural length,
3 is provided so that the surface thereof substantially coincides with the end surface 4a, but a projection or the like is provided around the cover member 13 or inside the support rod 4 so that the cover member 13 stops at the end surface 4a. You may. By closing the concave portion 4b at the end of the support rod 4 with the lid member 13 in this way, the appearance is improved and an accident such as a finger being pinched when the lock member 6 is inserted is prevented beforehand. Like that. Further, when the lock member 6 is abutted against the end surface 4a in such a state, the lid member 13 is retracted while being pushed by the end surface 6a of the lock member 6, and moves to the back side of the support rod 4. Here, the spring force of the urging means 14 may be weak enough to push the lid member 13 back to the end face 4a, or may be sufficient to push the lock member 6 back to the unlocked position via the lid member 13. It may be a strong one.

Further, the two rod-shaped support frames 2, 2 arranged on both sides of the cloth portion 18 are foldable.
The pair of support bars 3 and 4 are connected to each other by a pair of horizontal connection frames 20 and 20. Horizontal connection frame 20
Are respectively connected to two connecting rods 21 and 2 as shown in FIG.
1 and one hinge member 23 that connects them are provided so as to form a toggle mechanism. That is,
Connect one end of each of the two connecting rods 21 to the supporting rod 3 or 4 respectively.
And the other end of each connecting rod is connected to a hinge member 23 by connecting pins 22, 22.
The connecting rods 21 are provided so as to function as a toggle mechanism by swinging the connecting rods 21 around the pins 22 and 24 at both ends.

In the present embodiment, when the horizontal connecting frame 20 is changed from the bent state shown by the solid line in FIG. Of the connecting rods 21 and 21 at positions beyond the connecting pins 24 and
5 or the wall of the hinge member 23 so that it cannot swing any more. Therefore, even if an inward force that closes the stretcher 1 is applied to the stretched stretcher 1 in the left and right direction, the direction of the reaction force is reversed, and the contact with the hinge member 23 causes the connecting rod to move further. Because there is no (self-lock), there is no such thing as closing. As shown in FIG. 6, a handle 25 is formed integrally with the hinge member 23. When the handle 25 is pulled, the hinge member 23 exceeds the dead center.
The horizontal connection frames 20 are bent and folded by rotating the first and second frames 21. The outer ends of the connecting rods 21 and 21 are attached to the supporting rods 3 and 4 as shown in FIG. In this case, the leg portion 15 is provided with a notch groove capable of determining the movable range of the connecting rod 21 with respect to the support rods 3 and 4, thereby setting the maximum rotation range of the connecting rod 21.

The horizontal connecting frames 20, 20 are bent in the same direction when the rod supporting frames 2, 2 are linearly extended, in other words, when the rod supporting frames 2, 2 are folded, they are opposite to each other. It is arranged to bend in the direction. Moreover, the installation positions are arranged at different positions from the connecting member 5, and are provided so that the horizontal connecting frames 20 do not interfere with each other when the rod-shaped support frames 2, 2 are folded.

The horizontal connecting frames 20, 20 are arranged on the back side of the stretcher 1 as shown in FIG. 7, and swell downward so that a human body above the cloth portion 18 does not touch during use. It is curved. Specifically, the connecting rods 21 and 21
Has a slightly curved shape as shown in FIG.
The two end portions are rotatably connected to the hinge member 23 by 2.

In the foldable stretcher 1 of the present embodiment, four legs 15 are provided as shown in FIG.
This is convenient for placing the stretcher 1 in use on the ground or the like. The shape and mounting method of the leg 15 are not particularly limited as long as it can withstand a load. For example, as shown in FIG. 7, a trapezoidal aluminum material or the like is employed. The leg 15 is fixed to the support rods 3 and 4 using rivets, for example, or is fixed by welding or the like. In this embodiment, the legs 15 are arranged at different distances from the connecting member 5 so that the legs 15 do not interfere with each other when the stretcher 1 is folded as shown in FIG.

The left and right rod-shaped support frames 2, 2
A grip 17 is provided at an end portion of the stretcher 1 to facilitate carrying the stretcher 1. In this embodiment, in addition to the ease of grasping, when the folded stretcher 1 is leaned, it is considered that the grip 17 is often lowered as shown in FIG. 6, so that the floor is not damaged. A non-slip rubber grip 17 is used.

In this embodiment, as a member for forming the cloth portion 18 for holding a human body between the left and right rod-shaped support frames 2 and 2, a similar or similar canvas such as No. 9 canvas is used. . Although both sides of the canvas are folded and sewn to form a loop through which the rod-shaped support frames 2 and 2 pass, no loop is formed around the connecting member 5 to expose it as shown in FIG. . Note that a shoulder strap (not shown) provided along with the stretcher 1 can also be used as a fixed string wound around the stretcher 1 so as not to open when the stretcher 1 is folded.

The foldable stretcher 1 configured as described above is used as follows. First, the left and right rod-shaped support frames 2, 2 in the folded state are fully spread, and the lock member 6 is inserted into the recess 4b of the other support rod 4, so that the left and right rod-shaped support frames 2, 2 are inserted.
Is fixed in a straight line. Next, the horizontal connection frame 2
The 0 hinge member 23 is pushed or pulled out to the stop position to widen the interval between the left and right rod-shaped support frames 2 and 2 to a constant width and to connect them to each other. Thereby, the stretcher 1 having necessary and sufficient strength can be obtained. In this case, the one support rod 3 and the other support rod 4 are provided so as to be in a straight line when the two support rods 3 and 4 are turned to a position where they are no longer moved. Therefore, when the two support rods 3 and 4 are aligned, the lock member 6
Can be inserted into the recess 4b of the other support rod 4 as it is. In this way, the left and right rod-shaped support frames 2 and 2 are fixed and the knob 9 is also fixed so as not to move. There is no such thing as bending. Further, since the hinge member 23 has moved to the position where it stops beyond the dead center, the hinge member 23 and the support rods 3 and 4 on both sides do not move and the stretcher 1 does not close during use.

On the other hand, to fold the stretcher 1, first, the hinge members 2 of the two lateral connection frames 20 on the back side of the stretcher 1 are to be folded.
3 is moved by grasping its handle 25 and pulling or pushing it. Due to the movement of the hinge member 23, the angle between the connecting rods 21 and 21 on both sides is reduced, and the width of the left and right rod-shaped support frames 2 and 2 is reduced accordingly. Then, the knob 9 that keeps the lock member 6 from moving is loosened, and when the knob 9 is located in the cutout groove 8, the knob 9 is returned to the long hole 7, and the knob 9 is moved along the long hole 7. Then, the lock member 6 is retracted. As a result, the lock member 6 is pulled out from the concave portion 4b of the other support rod 4, and the engagement between the support rods 3, 4 is released.
After that, the left and right rod-shaped support frames 2 and 2 are bent at the center thereof, that is, at the connecting member 5, so that the stretcher 1
Just fold it. As shown in FIG. 6, the length of the folded stretcher 1 is reduced to about half the length in use, and the width is reduced to a fraction of that in use.

In the foldable stretcher 1 constructed as described above, the necessary and sufficient strength is ensured while having a relatively simple structure, and since the sliding lock member 6 is used, the operation required for folding or the like is performed. Less and simpler.
Moreover, if the support rods 3 and 4 are fixed in a straight line by the lock member 6, the knob 9 can be fixed so that the lock member 6 does not move, so that the stretcher 1 in use may be unexpectedly bent. Therefore, there is no possibility of an accident such as a finger being pinched during use. Further, the configuration of the lock member 6 itself is simple, and a high security is ensured without a finger being pinched when the lock member 6 is slid.

The above embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention. For example, in the present embodiment, the urging means is not particularly provided on the lock member 6 itself. However, in some cases, the lock member 6 is always urged in the direction of projecting or retracting between the lock member 6 and the support rod 3 that accommodates the lock member. A spring or the like may be provided. For example, if a compression coil spring is provided inside one of the support rods 3, the lock member 6 can be constantly urged in the direction in which the lock member 6 protrudes. Conversely, if a tension spring is provided, the lock member 6 can be constantly urged in the retracted direction. Can also. By doing so, it is possible to return the lock member 6 to the predetermined position (the locked position or the unlocked position) by the urging force without manually sliding the lock member 6. When the lock member 6 is urged to the lock position side, it becomes easy to maintain the locked state while the lock member 6 is inserted into the concave portion 4b of the other support rod 4, and when the lock member 6 is urged to the non-lock position side. Has a stretcher 1
When the lock member 6 is not in use, the lock member 6 is always connected to the one support rod 3.
Can be located within.

In the present embodiment, the notch 8 in the circumferential direction provided at the tip of the long hole 7 is for engaging the knob 9 to prevent the lock member 6 from moving in the axial direction. Therefore, as long as the knob 9 can be engaged, it is needless to say that the shape is not particularly limited to this. For example, although not shown, the shape may be a re-shape or a J-shape. Here, when the lock member 6 is urged in the retracting direction by the tension spring or the like as described above, the lock member 6 is once projected, and then the knob 9 is hooked on the notch groove 8 to lock the lock member 6. The member 6 can be held in this state. In addition, a long hole 7 and a notch groove 8
The knob 9 can provide resistance when it moves here by closing the boundary. According to this, the knob 9 does not easily return from the notch groove 8 to the long hole 7 without turning and tightening the knob 9.

[0037]

As is apparent from the above description, according to the foldable stretcher according to the first aspect of the present invention, when the rod-shaped support frame is extended and aligned, the lock member moves between the two support rods. It is arranged so as to straddle and integrates a pair of support rods against the load, so it has the necessary and sufficient strength as a stretcher, and even if you lift near the connecting member during use, it will bend and fingers will be pinched Nothing. Moreover, since the fixing relation is released only by sliding the lock member, the stretcher can be easily assembled and folded.

According to the foldable stretcher according to the second aspect of the present invention, the operation for locking the support rod is easy.

Further, according to the foldable stretcher of the invention according to the third aspect, the elongated hole is provided with a notch groove in the circumferential direction, and
Because of the shape, the knob can be positioned in the notch groove to prevent the lock member from sliding in the axial direction. Therefore, the lock member does not unexpectedly retract, and the stretcher during use does not bend.

According to the foldable stretcher of the present invention, when the stretcher is used, the lock member is allowed to enter the recess, but when the stretcher is not used, the lid member is connected to the end of the other support rod. By closing the recess, erroneous insertion of a finger or the like can be prevented. Moreover, when the fixing of the lock member is released, the lock member is pushed back by the return of the lid member to the original position and is pushed out of the concave portion, so that the lock member is automatically removed.

According to the foldable stretcher according to the fifth aspect of the present invention, if the horizontal connecting frame is bent and the rod-shaped support frame is folded, the stretcher can be folded not only in the length direction but also in the width direction to be compact. In addition, since the folded horizontal connection frames face in opposite directions to each other, they can be stored with a minimum volume without interference.

Further, according to the foldable stretcher of the invention, when the stretcher is folded, when the legs are opposed to each other between the bent rod-shaped support frames, they do not interfere with each other and can be minimized. It can be stored in volume.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a structure around a connecting member of a foldable stretcher according to the present invention, showing a position of a lock member and a knob in a state immediately before being inserted into a cutout groove.

FIG. 2 is a plan view of FIG. 1 showing a structure around a connecting member.

FIG. 3 is a bottom view of FIG. 1 showing a structure around a connecting member;

FIG. 4 is a cross-sectional view taken along line IV-IV when the lock member is at an unlock position in FIG.

FIG. 5 is an overall view of the foldable stretcher of the present invention, showing a state in which it is opened in the width direction and a state in which it is folded, as viewed from the back side.

FIG. 6 is a side view showing a state where a stretcher on which a cloth portion is not provided is folded.

FIG. 7 is a view showing a state where the stretcher is viewed from above in FIG. 5;

FIG. 8 is a plan view showing a conventional separable stretcher.

FIG. 9 is a side view showing a conventional foldable stretcher.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foldable stretcher 2 Rod-shaped support frame 3 One support rod 3b The concave part of the end 4 The other support rod 4b The concave part of the end 5 Connecting member 6 Lock member 7 Long hole 8 Notch groove 9 Knob 13 Cover member 14 Energizing Means 18 Cloth

Claims (6)

[Claims] 1. A connecting member portion, wherein a fabric is stretched between two rod-shaped supporting frames, and each of the rod-shaped supporting frames rotatably connects one end of a pair of supporting rods to a connecting member. In a foldable stretcher that can be bent only in one direction, a concave portion is formed on at least opposing end surfaces of the pair of support rods, and the other support member is slidable in the axial direction in the concave portion of one of the support rods. A lock member protruding toward the concave portion of the rod is provided, and when the support rods are respectively rotated about the connecting members and extended in a straight line, the lock member is protruded and inserted into the concave portion of the other support rod. A foldable stretcher, wherein the two support bars are integrated to form a rod-shaped support frame by arranging the lock member between the two support bars. 2. An elongated hole extending in the axial direction is provided on a peripheral surface of the one support rod, and a knob is provided on the lock member through the elongated hole, and the lock member is slid by operating the knob. The foldable stretcher according to claim 1, wherein the stretcher is moved. 3. A notch groove for turning the knob in the circumferential direction is provided on a tip end side of the end face of the end face near the concave portion, and the knob is inserted into the notch groove so that the lock member is fixed. 3. The foldable stretcher according to claim 2, wherein the sliding in the axial direction is restrained. 4. An end opening of the other support rod is provided with a lid member slidable in the inside and closing the end when unlocked, and the lid member is provided by a built-in urging means. The foldable stretcher according to any one of claims 1 to 3, wherein the stretcher is constantly biased toward the support rod side. 5. The two rod-shaped support frames are connected to each other by a foldable horizontal connection frame for each of the pair of support rods, and the horizontal connection frame extends the rod-shaped support frame in a straight line. The foldable stretcher according to any one of claims 1 to 4, wherein the foldable stretcher is bent in the same direction as each other and arranged at different positions from the connecting member. 6. The rod-shaped support frame is provided with legs for each support rod, and the positions of the legs are shifted from each other when the pair of support rods are bent at the connecting member. A foldable stretcher according to any one of claims 1 to 5, characterized in that: