JP2015009129A - Twist prevention structure of stretcher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sectional self-standing stretcher, allowing an ordinary person to easily assemble the stretcher and to safely convey a sick or wounded person at ease.SOLUTION: Two foldable pipes provided in right and left wheels and stands are changed into stretcher bar joints 5 so as to impart stability to a stretcher, each stretcher bar joint 5 is provided with stretcher bar joint link trusses 6 such that the stretcher is made to have a truss structure to be stabilized, and furthermore, wheels 7 and the stands 8 are respectively provided with stand crossbars 9 to be stabilized. Because an end part of the stand crossbar 9 close to the stretcher is released such that the stand crossbar 9 does not hinder stretcher storage, stand crossbar fixing pins and the stand crossbars 9 are fitted when using the stretcher, and the stretcher is fixed by stand crossbar fixing hooks (on fixing part sides) and stand crossbar hooks (on the stand crossbar sides).

Description

  The present invention relates to the prevention of bending of a self-supporting stretcher with a folding wheel that can easily and easily convey a sick person alone or by a woman or girl.

  Conventional stretcher transports one or two victims with two to four people, and the weight of the victim is distributed to the carrier's hand, but if the victim is an adult, four transporters per person It had to have more than 10kg, which was hard work for the general public. Therefore, we have developed a self-supporting stretcher with folding wheels that can be used by a single carrier.

JP 2011-156328 A

The self-supporting stretcher with wheels of Patent Document 1 is an assembly type, and is easy to carry and assemble.
Even if the carrier is a woman or a child, it can be easily prepared and transported.

  However, it was found that if the ground is undulated, the stretcher itself bends according to the undulation of the ground, and the patient feels anxiety.

  Since Patent Document 1 is fixed with a stay so that there is no wobbling between the wheel and the stand, there is no play in the front-rear direction with respect to the traveling direction, so that it is stable. In the lateral direction, the bi-fold pipes were spread and fixed on the left and right wheels and stand, so it was possible to stabilize a little.

  However, this makes it difficult to stabilize against the twist of the stretcher, and the stretcher is twisted due to the influence of the wobbling in the lateral direction.

  In order to prevent twisting of the stretcher, the folded pipes provided on the left and right wheels and the stand are changed to stretcher bar joints (5), and each stretcher bar joint (5) has a truss structure so that the stretcher is stable. A bar joint link truss (6) was provided.

  Furthermore, the wheel (7) and the stand (8) were each provided with a stand cross bar (9) for stabilization.

  The stand cross bar (9) has an open end close to the stretcher so as not to disturb the stretcher. When using the stretcher, fit the stand crossbar fixing pin (12) and the stand crossbar (9), and the stand crossbar stop hook (stop side) (15) and stand crossbar stop hook (stand crossbar side) Fix with (16).

  Explanatory drawing of the frame structure (when stored) of a conventional folding stretcher   Explanatory drawing of frame structure (under development) of a conventional folding stretcher   Explanatory drawing of frame structure (when unfolding) of a conventional folding stretcher   Explanatory drawing of twist of conventional folding stretcher   Explanatory drawing of twist of conventional folding stretcher   Explanatory drawing of twist of conventional folding stretcher   Explanatory drawing of twist of conventional folding stretcher   Schematic diagram of the structure around the stand   Illustration of the structure of the back of the stretcher   Illustration of the structure around the stand and wheels   Explanatory drawing of folding structure of stretcher bar joint   Explanatory drawing of each part operation when folding the stretcher bar joint   Explanatory drawing of the operation of each part when the stretcher is stored   Explanatory drawing of twist prevention structure (truss) during stretcher assembly and storage   Explanatory drawing seen from before and after storing the stretcher   Illustration of the fixing structure of the stand crossbar   Illustration of the stand crossbar fixing structure (before fixing)   Illustration of stand crossbar fixing structure (when fixed)   Explanatory drawing of preparation for assembling a self-supporting stretcher with folding wheels   Explanatory drawing showing the stand of a self-supporting stretcher with folding wheels and the direction to raise the wheels   Explanatory drawing which shows the state which raised the stand and wheel of a self-supporting stretcher with a folding wheel   Explanatory drawing showing positioning of stand and wheel of self-supporting stretcher with folding wheel   Explanatory drawing of victim transport after positioning the stand and wheels   Illustration of transport with the stand and wheels stored   Illustration of fixing the stand when the stand stands   Illustration of injury prevention operation when the stand is stored

1 and 2 show a frame structure of a conventional folding stretcher.
In this configuration, when the patient is placed on the victim and started to be transported, the twist as shown in FIG. 4 occurs. 5 to 7 show the state of twisting as seen from the front or rear direction with respect to the transport direction.

  Patent document 1 incorporates the structure of a wheel, a stand, and folding in this structure.

  In the case of Patent Document 1, when one or two carriers grab the stretcher bar (2) and lift it, the stand is separated from the ground while only one set of left and right wheels are grounded. When the movement starts in this state, the stretcher twists as shown in FIGS. 4 to 7 if there is a difference in the height of the carrier or if breathing does not match. Even if there is only one carrier, the same twist occurs if the carrier hurries or if the scaffolding is bad and the carrier's body shakes. This twist is easily deformed depending on how the stretcher bar (2) is held, and the difference between the left and right when the injured person is placed may be 10 to 15 cm, and the injured person may be shaken off. It is extremely dangerous.

  Therefore, as shown in FIG. 8, the left and right stretcher bar joints (5) are provided with stretcher bar joint link trusses (6) so as to be stable with a truss structure. Furthermore, the wheel (7) and the stand (8) were each provided with a stand cross bar (9) for stabilization. This can ensure lateral stability.

  FIG. 9 shows a situation in which a truss structure is provided on a stretcher with the wheels and the stand folded. The stretcher bar joint (5) is provided with a stretcher bar joint link truss (6), and the wheel (7) and the stand (8) are each provided with a stand cross bar (9) for stabilization.

  FIG. 10 shows an outline of the stretcher upon completion of assembly. By making each frame a truss structure in all directions, front and rear, left and right, and top and bottom, it was possible to prevent twisting in all directions. Here, the stand front-rear link truss (11) ensures the stability in the front-rear direction.

  FIG. 11 shows the movement of the stretcher bar joint (5) and the stretcher bar joint link truss (6) in a state where the stretcher is assembled, and FIG. 12 shows the state when the stretcher is stored. The stretcher bar joint link truss (6) can fold the stretcher bar joint (5) by sliding the stretcher bar joint link truss storage groove (18). FIG. 13 includes a stand cross bar (9) provided on the stand and the wheel, and can be folded by being released from the stand cross bar fixing pin (19) provided on the stand (8) and the wheel (7). it can.

FIG. 14 shows the details of the truss structure for preventing torsion.
FIG. 14 shows the trajectories of the stretcher bar joint (5) and the stretcher bar joint link truss (6) when the stretcher is stored and assembled.
The two left and right stretcher bars (2) are configured to be kept parallel by a stretcher bar joint (5).
The range indicated by (A) in the figure is a state where the stretcher is assembled, and the range indicated by (B) is a state where the stretcher is housed.

In the state where the stretcher is assembled, one end of the stretcher bar joint (5) is locked by the stretcher bar joint connection pin (22), and the other end is the stretcher bar joint support pin (right) (23) and the stretcher bar joint. It is supported by a support pin (left) (24).
Between the stretcher bar joint (5), the stretcher bar joint support pin (right) (23), and the stretcher bar joint support pin (left) (24), one end of the stretcher bar joint link truss (6) is a stretcher bar joint. The other end is supported by the link truss connecting pin (25), and the other end is stretched in the stretcher bar joint link truss storage groove (18) in the stretch bar joint link truss storage (17) fixed to the stretcher bar (2). The bar joint link truss sliding pin (26) is engaged.

The stretcher bar joint link truss slide pin (26) in a state where the stretcher is assembled is in a position indicated by E and G in the drawing, and corresponds to the “assembly lower limit position” described in FIGS. The link truss (6) reaches the stroke end of the stretcher bar joint link truss housing groove (18).
At this time, a regular rectangle is formed between the stands (8) at the portions indicated by B, C, H, and I.
This means that the four left and right stretcher bars (2) are held in a triangular truss structure consisting of a stretcher bar joint (5) and a stretcher bar joint link truss (6) with the four B, C, H and I as fulcrums. This prevents the transition from a regular rectangle to a parallelogram due to external forces.

  At present, the state is as shown in FIG. 9. When the stand (8) is raised and the stand crossbar (9) is assembled as shown in FIGS. 15 and 16, the stand (8) is also tilted by the truss structure triangle. Can be prevented.

  When the stretcher is housed, the range shown in FIG. 14 (b) is obtained. In this case, the stretcher bar joint connection pin (22) is also supported by the stretcher bar joint support pin (right) (23) and the stretcher bar joint support pin (left) ( 24) is used as a fulcrum and rotates in an arc from the position of A to the position of A '. The two left and right stretcher bars (2) are supported by B, C', H, and I ' Each triangle is held by a truss structure, and it does not change from a regular rectangle to a parallelogram.

  The stretcher bar joint link truss (6), as shown by (c) in the figure, in the state where the stretcher shown in (a) is assembled and in the state where the stretcher shown in (b) is stored, 26) moves the stretcher bar joint link truss storage groove (18) from the position indicated by E to E ′ and from the position indicated by G to G ′, and reaches the stroke end at the stretcher bar joint link truss storage groove (18). . Thus, a regular rectangle can be held with a structure in which the triangles of the truss portions of B, C, H, I or B, C ', H, I' have the same size.

  The movement of the two left and right stretcher bars (2) during the storage of the stretcher has been described in the direction from the position indicated by (A) to the position indicated by (B).

15 to 18 show a fixing configuration of the stand cross bar (9).
The stand (8) for assembling the stretcher is assembled as shown in FIGS.
Raise the folded stand, insert the stand cross bar fixing pin (19) into the stand cross bar hole (20) at the end of the stand cross bar (9), and stand on the stand cross bar stop (14). Insert the stop hook (stop side) (15) into the stand crossbar stop hook (stand crossbar side) (16).
This completes the fixing of the stand (8). The same applies to the wheels.

FIG. 19 shows an attempt to assemble a self-supporting stretcher with folding wheels.
It can be assembled easily when leaning against a wall or the like as shown in the figure or when an assistant supports it instead of a wall, but it is also possible to assemble the stand (8) and wheels (7) while leaving them laid down. It is.
Normally, when the seat (3) of the stretcher body (1) is expanded in such a leaning state, the wheels (7) and the stand (8) also expand.

When the seat (3) is expanded to the maximum extent, the stand cross bar (9) spreads to the fixed position as shown in FIG. 17, so it is fixed with the stand cross bar fixing pin (19) and completely with the stand cross bar stopper (14). Secure to.
At this time, the positional relationship between the stretcher bar joint (5) and the stretcher bar joint link truss (6) is as shown in FIG. 11, and the stretcher bar joint link truss slide at the end of the stretcher bar joint link truss (6). The moving pin (26) is in the assembly lower limit position, that is, the position shown in FIG. 14 (E), and the complete truss structure is completed, so that twisting can be prevented.

  Next, as shown in FIG. 20, the stand (8) and the wheel (7) are raised and the stand fixing knob (21) is tightened to fix the stand front and rear link truss (11).

  FIG. 21 shows a state where assembly is completed. If it is lowered to the ground, it can be used immediately as shown in FIGS.

FIG. 22 shows the positioning of the stand (8) and the wheel (7).
The stand (8) and the wheel (7) are located at about a half of the front and rear directions from the center of the stretcher body (1) and support the weight of the victim by half.
In order to reduce the heavy burden on the carrier, there is a method in which the wheel (7) is moved toward the center.
When the wheel (7) is brought close to about ¼ from the center, the burden on the carrier can be reduced to about ５ of the patient's weight.
However, in this case, since the carrier becomes extremely unstable when the carrier is released during the pause, the position of the wheel (7) should be determined in consideration of the lightness during the carriage and the stability / safety during the pause. .
When the wheel (7) is positioned and conveyed in this manner, the result is as shown in FIG.

FIG. 24 shows an example in which the stand (8) and the wheel (7) are conveyed without being raised.
In the case where it is difficult to stand the stand (8) or the wheel (7) due to rubble or mud, the scaffold can be transported with the stand (8) and the wheel (7) stored.
If the sheet (3) is expanded to the maximum and the stand cross bar (9) is fixed, it can be conveyed with the stand (8) and the wheels (7) stored as shown in FIG.
Of course, it is necessary to fix the stand (8) and the wheel (7) with the stand fixing knob (21).

  (L) in the figure shows the distance between the stretcher bar (2) and the ground, which is largely related to the positioning of the wheel (7) described above. Can avoid contact.

  FIG. 25 shows the vicinity of the stand front and rear link truss (11) of the stand (8) and the wheel (7). The stand opening lever (27) is for safely storing the stand (8) and the wheel (7).

  To store the stand (8) and wheels (7), loosen the stand fixing knob (21) at the end of the stand front and rear link truss (11), hold the stand (8), and press the stand release lever (27) When the stand is tilted in the folding direction, the stand fixing knob (21) can be folded while sliding in the stand front / rear link truss storage groove (30) in the stand front / rear link truss storage (29). ), The front / rear link truss (11) and the front / rear link truss storage section (29), and can be safely stored.

1 Stretcher body 2 Stretcher bar 2 'Stretcher bar (when the stretcher is stored)
3 Seat 4 Feet 5 Stretcher bar joint 5 'Stretcher bar joint (when the stretcher is stored)
6 Stretcher bar joint link truss 6 'Stretcher bar joint link truss (when the stretcher is stored)
7 Wheel 8 Stand 9 Stand cross bar 9 'Stand cross bar (when the stretcher is stored)
10 Stand crossbar hole 11 Stand front / rear link truss 12 Stand crossbar fixing pin 13 Stand crossbar 14 Stand crossbar stop 15 Stand crossbar stop hook (stop side)
16 Stand crossbar stop hook (stand crossbar side)
17 Strut bar joint link truss storage part 18 Strut bar joint link truss storage part groove 19 Stand cross bar fixing pin 20 Stand cross bar hole 21 Stand fixing knob 22 Strut bar joint connection pin 23 Strut bar joint support pin (right)
24 Stretcher bar joint support pin (left)
25 Strut bar joint link truss connection pin 26 Strut bar joint link truss sliding pin 27 Stand release lever 28 Stand front / rear link truss support pin 29 Stand front / rear link truss storage section 30 Stand front / rear link truss storage section groove

Claims (3)

  Folding characterized in that a stand cross bar and a stand front and rear link truss are provided to prevent twisting of the stretcher in a self-supporting stretcher with a folding wheel in which a stand, a wheel, and a stretcher bar joint are incorporated in the stretcher Self-supporting stretcher with type wheels.   A stretcher bar joint, a stretcher bar joint link truss, a stretcher bar joint link truss storage part, and a stretcher bar joint link truss storage groove are provided on the stretcher, and a stand cross bar, a stand front and rear link truss, and a stand cross bar are provided on the stand and wheels. It is possible to easily fold or assemble a stretcher by providing a fixing pin, a stand crossbar stopper, a stand crossbar stopper hook, a stand crossbar fixing pin, and a stand crossbar hole. The self-supporting stretcher with a folding wheel according to claim 1.   The self-supporting stretcher with folding wheels includes a stretcher bar joint, a stretcher bar joint link truss, a stretcher bar joint link truss storage part, a stretcher bar joint link truss storage groove, a stand cross bar, a stand cross bar fixing pin, Stand crossbar stopper, stand crossbar stopper hook, stand crossbar fixing pin, stand crossbar hole and stand fixing knob are provided so that the stand and wheels can be attached even in a state where the scaffolding is bad. The self-supporting stretcher with a foldable wheel according to claim 1 or 2, characterized in that it can be used as a stretcher.

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