JPH0365978B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lashing and releasing device for a stretcher mounted on an ambulance.

[Conventional technology]

Ambulances are equipped with stretchers for lying down emergency patients. This stretcher is provided with casters at its lower part so that it can be moved, so that the stretcher can be quickly and easily loaded into or unloaded from an ambulance while the patient is lying down.

[Problem to be solved by the invention]

It is hard work for the team members to load and unload the frames while waiting for the stretcher tanka. It is better to attach and detach the wheels to the frame by placing the wheels on the stretcher and moving them forward and backward. For this purpose, a stretcher with casters is used, and in order to easily load and unload the stretcher onto the ambulance, guide rails are provided on the floor of the ambulance to guide the stretcher while regulating the direction of the casters. Providing a guide rail for guiding the wheels protruding from the side of the frame or the floor increases the weight and reduces work efficiency for the crew. Furthermore, since the wheels are casters, it is necessary to increase the width of the guide rail in consideration of caster rotation.

[Means to solve the problem]

An elevating frame is freely installed on a base fixed on the floor via a swinging arm, and the elevating frame supports the stretcher mounted in the ambulance by lifting its lower part, and the arm and base A compression spring for absorbing vibrations and a shock absorber are provided between the stretcher and the stretcher, and by simply moving the stretcher on the floor, the stretcher can be lowered and secured to and released from the frame at the lowest position.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The securing and releasing device for a vibration-proof stretcher according to the present invention will be explained below based on the illustrated embodiments.

In the figure, F is the floor of the ambulance, S is a stretcher that can be mounted inside the ambulance, and V is a vibration isolator that is installed on the ambulance side and supports the stretcher so as not to transmit the vibrations of the ambulance to the stretcher.

Ambulances are conventionally used one-box or station wagons.

The stretcher S has a commonly used configuration, which includes a bed having a required size and casters C at the bottom thereof.

As shown in Figure 1 and below, the vibration isolator V includes a base 1 fixed at a predetermined position on the floor of the ambulance, an elevating frame 2 disposed on the base 1 and supporting the stretcher S, the base 1, and an elevating frame 2. An arm 3 connecting frames 2 and swinging this arm 3,
It also includes a drive device 4 that absorbs vibrations. On the base 1, two arms 3, 3 are swingably supported on one shaft 6 which is supported by bearings 5, 5, and this arm 3 is L-shaped, and its bent part is supported pivotably. , and the tips of the two arms 3, 3 are made to protrude obliquely upward in opposite directions, but the base ends are located below the shaft 6 and are arranged to face each other laterally. And the base end side 3a of this arm 3
A compression spring 7 is disposed between the arm base end 3a and the base 1 on the outer side of the arm 3, and a hydraulic cylinder 8 is disposed between the arm base end 3a and the base 1 on the inner side of the arm 3. The action of the spring 7 and the action of the hydraulic cylinder 8 are provided so as to repel each other. Similarly, on the other arm 3, a compression spring 7 and a hydraulic cylinder 8 are disposed on both sides of the base end of the arm so as to repel each other. The arrangement of the two shall be different from each other. Therefore, the tips 3b, 3 of the arms 3, 3
The load applied to b is simultaneously applied to a compression spring or a hydraulic cylinder, and the two arms are simultaneously swung in the same direction about the shaft 6 by operating the hydraulic cylinder.

A shock absorber 9 is disposed between a part of the arms 3, 3, for example, an intermediate part and the base 1. This shock absorber 9 has one end locked to the base 1 side and the other end locked to the arm 3 side, so as to absorb vibrations between the base and the lifting frame applied to the arm 3.

The elevating frame 2 is a frame-shaped frame having an appropriate size to support the stretcher S. Guide rails 10, 10 are provided on both sides of the elevating frame 2, and guide rollers 12, 12 are provided on the opposing guide rails.
As a result, when the arms 3 and 3 swing, even if the arm tip position moves in an arc shape around the shaft 6, the guide roller moves along the guide rail. The elevating frame 2 is smoothly raised and lowered by the tilting movement.

One link 13 is bridged between one of the arms and the lifting frame, and preferably one end of the link 13 is pivotally supported on the lifting frame at a position perpendicular to the shaft 6, and the other end of the link is a part of the arm. The link 13 is pivotally supported so that the span between both ends of the link 13 and the shaft 6 form an isosceles triangle shape. As a result, when the elevating frame 2 moves up and down due to the swinging (tilting movement) of the arms 3, 3, the elevating frame 2 is regulated by the link 13 and moves up and down on the same vertical line. Movement in this direction can be prevented.

Further, one or two pairs of fixed hooks 14 and movable hooks 15 for locking the stretcher S are provided on the upper surface of both front and rear ends of the elevating frame 2 in the front and rear direction. As shown in FIG. 6, the fixing hooks 14 are always open in the direction in which the stretcher S is inserted, and are fixed to both left and right sides of the upper surface of the lifting frame 2 with bolts. This locks the locking rod _S1 protruding from the side of the vertical frame of the stretcher S, thereby locking the stretcher S in the vertical and depth directions, but not in the opposite direction of insertion of the stretcher S. is not locked and becomes free. Then, with the stretcher placed on the floor surface F of the ambulance and the elevating frame lowered, the locking rods are automatically inserted into the fixing hooks by pushing the stretcher.

The movable hook 15 has a hook main body 1 that opens in the same direction as the fixed hook 14, as shown in FIG.
5a are fixed to both left and right ends of the upper rear end of the lifting frame 2, and both left and right hook bodies 15
A shaft 15b is rotatably installed between the shafts 15a and 15a, a lock spring 15e is attached to this shaft, and movable hook pieces 15c are provided adjacent to the hook main body 15a at both ends of the shaft. 15b, both movable hook pieces 15c, 15c are made to rotate about the shaft 15b. Movable hook piece 15
c closes the opening of the hook body 15a as shown by the solid line in FIG. Make it fully open. This movable hook piece 15c
The tip of the hook body 15a engages a locking rod _S2 projecting from the side of the vertical frame of the stretcher S fitted into the hook body 15a, so as to prevent the stretcher from coming off.

One end of a wire 16 for opening and closing the hook is fixed to the bracket 15d, and the tip of the wire 16 is guided along the elevating frame 2 to the front part of the frame, and an operating handle 17 is provided thereon. Therefore, the movable hook piece 15c always opens the hook body 15a by the tightening spring 15e, but by pulling the operation handle 17, the wire 16,
The movable hook piece 15c is attached via the bracket 15d.
is swung to fully open the hook body 15a.

In the stretcher constructed as described above, when the stretcher S with the patient lying down is loaded onto an ambulance, the arm 3 is first swung by operating the hydraulic cylinders 8, 8, and the elevating frame 2 is stopped in a lowered state. At this time, the elevating frame position is below the bed surface of the stretcher S,
In addition, the locking rods S ₁ and S ₂ that are projected from the stretcher as it moves forward are positioned so that they can be locked to the fixed/movable hooks as they are.

The stretcher is then inserted into the ambulance at the designated position using its casters. This can be done by the lower caster C.

When the stretcher S is pushed to a predetermined position, locking rods S ₁ and S ₂ at the front and rear of the stretcher are engaged with the fixed hook 14 and the movable hook 15, respectively. Then, when the hydraulic pump is driven and the hydraulic cylinder 8 is driven to swing the arms 3, 3 and raise the ends of the arms, the elevating frame 2 rises by pushing up the lower surface of the stretcher S. , the entire load of the Stretcher S is supported by the lifting frame. When the elevating frame rises to a fixed position, the swinging of the arm 3 is stopped. The ambulance is driven in this state, and even if the ambulance vibrates at this time, the impact force is absorbed by the cooperative action of the spring 7 provided on the arm, the hydraulic cylinder 8, and the shock absorber 9.

〔Effect of the invention〕

Since the present invention is constructed as described above, there is no need to lift the stretcher and place it on and off the ambulance, and moreover, the stretcher placed on the floor without a guide rail can be pushed and moved by the casters at the bottom of the stretcher. It has the advantage of being able to be placed on a lifting frame and lashed and released, greatly reducing the labor involved in loading and unloading the stretcher.

[Brief explanation of drawings]

Fig. 1 is a front view of the lashing and release device of the anti-vibration stretcher of the present invention, Fig. 2 is a front view when the elevating frame is raised, Fig. 3 is a cross-sectional view, Fig. 4 is a plan view, and Fig. 5 is a front view.
The figure is a front view of the stretcher lock, FIG. 6 is a plan view of the fixing hook, and FIG. 7 is a side view. F is the floor of the ambulance, S is the stretcher, C is the caster, V is the vibration isolator, 1 is the base, 2 is the lifting frame, 3 is the arm, 6 is the shaft, 7 is the compression spring, 8 is the hydraulic cylinder, 9 is the A shock absorber, 14 is a fixed hook, 15 is a movable hook, and 16 is a wire.

Claims (1)

[Claims] 1 The bent portions of two L-shaped arms are supported on the same axis so as to be able to swing freely on the base, and the tips of the two arms are provided so as to protrude diagonally upward in opposite directions. A compression spring is disposed between one side of the proximal end of each arm and the base, and a hydraulic cylinder is disposed between the other side and the base, and the compression spring and the hydraulic cylinder repel each other. In a stretching device in which cylinders and compression springs are arranged differently and a lifting frame is provided at the tip of the arm, a fixed hook and a movable hook for locking the stretcher are provided as a pair in the front and back direction on the lifting frame and fixed. The hook has a shape that is always open in the direction of insertion of the stretcher, and the movable hook has a hook body that is always open in the direction of insertion of the stretcher, similar to the fixed hook, and a movable hook that is pivotally supported on the hook body by spring pressure so that it can swing freely. A lashing and releasing device for a vibration-proof stretcher, which is made up of two pieces and has horizontal bars at the front and rear of the stretcher so as to be simultaneously locked to both fixed and movable hooks at the lowering fixed position of an elevating frame.