JPH0344182Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lashing and releasing device for a stretcher mounted on an ambulance.

[Conventional technology]

A stretcher for lying down emergency patients is made transportable and mounted on an ambulance. This stretcher is equipped with casters at the bottom so that it can be easily moved within a hospital, etc., so that the stretcher can be quickly and easily loaded into or unloaded into an ambulance while the patient is lying down.

[The problem that the idea attempts to solve]

It is hard work for the team members to lift the stretcher tanka while loading and unloading the frame. Place the wheels on the stretcher and
It is better to be able to attach and detach it from the frame by moving it forward and backward. For this reason, a stretcher with casters is used, and in order to easily load and unload the stretcher onto the ambulance, a guide rail is provided on the floor of the ambulance to guide the stretcher while regulating the direction of the casters. In this way, a guide rail for guiding the wheels is provided protruding from the floor surface on the side of the frame, and the stretcher is moved and placed on the elevating frame using this guide rail, but if this is done as it is, as the ambulance runs,
This is dangerous as the stretcher may be displaced from the position on the lifting frame. For this reason, it is necessary to provide a stopper device, and heretofore, opening and closing of this stopper has been done manually, which is time-consuming.

The present invention was developed in view of this.

[Means to solve the problem]

An elevating frame is provided on a base fixed on the floor so that it can be raised and lowered via a swinging arm, and the elevating frame supports the stretcher mounted on the ambulance by lifting its lower part. , the lifting frame is at the lowered position and the stretcher is locked so that the locking rod protruding from the stretcher moving on the floor is locked to the fixed hook and movable hook provided on the frame at the lowest position of the lifting frame. In the stretcher in which the rod position is determined, the movable hook is attached to an elevating frame mounted on an ambulance, and the movable hook is composed of a hook body having a U-shaped opening and a movable hook piece having a hook piece at the tip, This movable hook piece is swingably provided on the hook body via a shaft, a connecting link is provided on the movable hook piece, a swinging link that swings by pulling a wire is connected to the connecting link, and the connecting link The gist of the present invention is to provide a return lever that swings when the stretcher swings to prevent the locking rod provided on the stretcher from coming off.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The securing and releasing device for a 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 FIG. 2 and below, the vibration isolator V includes a base 1 fixed at a predetermined position on the floor of an ambulance, an elevating frame 2 supporting a stretcher S disposed on the base 1, and a base 1. , an arm 3 that connects the lifting frames 2, and a drive device 4 that swings the arm 3 and absorbs vibrations.
The base 1 has a single shaft 6 supported by bearings 5, 5.
The two arms 3, 3 are swingably supported, and the arm 3 is L-shaped, and its bent portion is supported pivotally, and the tips of the two arms 3, 3 are tilted in opposite directions. It is made to protrude so as to extend upward, but the base end side is located below the shaft 6 and is disposed so as to face left and right. The arm base end 3a is attached to the outer surface side of the base end side 3a of each arm 3.
A compression spring 7 is disposed between the arm base end 3a and the base 1, and a hydraulic cylinder 8 is disposed between the arm base end 3a and the base 1 on the opposite inner surface side, and the action of the compression spring 7 and the action of the hydraulic cylinder 8 on the arm 3. and are provided so that they repel each other. Similarly, the other arm 3 has a compression spring 7 and a hydraulic cylinder 8 on both sides of the arm base end.
The hydraulic cylinders and compression springs of the two arms 3, 3 are arranged so that they repel each other, but the arrangements of the hydraulic cylinders and compression springs are different from each other. Therefore arm 3,3
The load applied to the tips 3b and 3b of the arms is simultaneously applied to a compression spring or a hydraulic cylinder, and the two arms are made to simultaneously swing in the same direction about the shaft 6 as a fulcrum 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 spanned 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 above the vertical line of the shaft 6, and the other end of the link is connected to a part of the arm. The link 13 and the shaft 6 have an isosceles triangular 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. The hooks 14, 14 lock the locking rod S1 projecting from the side of the vertical frame of the stretcher S, thereby locking the stretcher S in the vertical direction and the depth direction. It is designed to be free in any direction without being locked. 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.

As shown in FIG. 1, the movable hook 15 for fixing or releasing the stretcher to the lifting frame 2 faces the direction in which the stretcher enters the lifting frame 2, and has a U-shaped opening in the same direction as the fixed hook 14 and in the vertical direction. The hook body 20 is fixed directly or via the base plate B on the lifting frame. The hook bodies 20 are fixed on the rear end side of the lifting frame 2 so as to face each other on both left and right sides.
1 is installed so that it can rotate freely. Therefore, this shaft 21
is rotatably supported by bearings provided on the hook bodies 20, 20. A slide plate P is provided on the U-shaped opening of the hook body 20, and a slide plate P having an inclined upper surface Pa is provided, and a movable hook piece 22 is fixed to the shaft 21 so as to be vertically opposed to the slide plate P. , and the movable hook piece 22 and the hook body 20 are adjacent to each other. The movable hook piece 22 has its proximal end fixed to the shaft 21, and its distal end side integrally forms a hook 22b with an inclined surface 22a, and the slide plate P and the inclined surface Pa of the movable hook piece 22, The stretchers 22a face each other vertically, and the stretcher S has a wide end on the entry side and a narrow end on the back end.

A link 23 is provided protruding from the base end side of the movable hook piece 22, and a connecting link 25 is pivotally supported at the tip of this link via a shaft 24. The distal end of the connecting link 25 is connected via a shaft 26 to the distal end of a swing link 28 which is swingably supported on the elevating frame 2 via a shaft 27 . One end of a wire 29 disposed along the lifting frame 2 and supported by wire mounting brackets 34 and 35 is fixed to a part of this swing link 28, and a handle 37 is attached to the other end of the wire 29. By rotating or pulling the handle 37, the wire 29 is pulled, and the swing link 28 is caused to swing back and forth about the shaft 27. Note that the lower end of a return lever 30 pivotably pivoted to the elevating frame 2 via a shaft 31 is brought into contact with one side of the connecting link 25, and the tip of the lever is positioned forward of the tip of the slide plate P. By swinging this lever, the tip of the lever is placed above or below the top surface of the plate P, and a bracket 33 is attached to the return lever 30.
The tip of the tension spring 32 is locked so that the tip of the lever 30 is always on standby at a position lower than the top surface of the slide plate.

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,
The locking rods S1 and S2, which are projected as the stretcher moves forward, are at positions where 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, the locking rods S at the front and rear of the stretcher
1 and S2 are engaged with the fixed hook 14 and the movable hook 15, respectively.

At this time, the movable hook 15 is in the solid line position in FIG. Push the inclined surface 22a. As a result, the movable hook piece 22 swings upward about the shaft 21, that is, in the direction of the chain line in FIG. As a result, the connecting link 25 and the swinging link 28 are arranged substantially in a straight line as shown by the chain line in the figure by the swinging of the movable hook piece. As a result, the lower end of the return lever 30 is pushed by the connecting link against the tension spring, and the tip end of the lever projects upward from the slide plate P. As a result, the movable hook piece swings upward, and when it is opened, the locking rod S2 is prevented from coming off by the tip of the return lever which is designed to spring up, thereby ensuring safety. and locking rod S
2 reaches the innermost end of the opening of the hook main body, the locking rod S2 passes through the hook piece 22b, and when the return lever returns to the solid line position by the action of the tension spring 33, the connecting link is closed at the lower end of this lever. Press to return the movable hook piece 22 to its original position, whereby the locking rod S2 inserted into the opening of the hook body is locked by the hook piece 22b, preventing it from coming off, and is in a completely fixed state. becomes.

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, this causes the elevating frame 2
is raised to push up the lower surface of the stretcher S, and 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 swings 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.

Also, to lower the stretcher, first lower the lifting frame to the specified position in the opposite manner to the above, and then
Next, when the wire 29 is pulled by pulling or turning the handle 37, the swinging link 28 swings in the direction of the chain line in FIG. 20 is in an open state. When the stretcher is pulled out in this state, the locking rod S2 is completely pulled out from the movable hook by pressing the tip of the return lever, and the lock is released. Locking rod S2 from movable hook 15
Once removed, the stretcher can be pulled out freely.

After the stretcher is pulled out, the return lever 30 and movable hook piece 22 are moved by the action of the tension spring.
returns to its original state as shown by the solid line in Figure 1.

[Effect of idea]

According to the present invention, a movable hook provided on a frame that moves up and down is locked after swinging freely when the stretcher is pushed in by a locking rod protruding from the stretcher, and this wire is only pulled when the wire is pulled to release the lock. Since the swing link is swung through the lever, the lock is released by swinging the lever, and once the lock is released, there is no need to keep pulling the wire, and the stretcher can be unfastened easily and reliably. Moreover, the movable lock is returned and locked simply by pushing the stretcher into the predetermined position of the elevating frame using the return lever, which has the advantage of improving safety.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing the main parts of the stretcher locking release device, Figure 2 is a front view of the stretcher placed on the lifting frame, Figure 3 is a front view of the lifting frame when it is raised, Figure 4 5 is a plan view of the same figure, and FIG. 6 is a plan view of the fixing hook. 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 buffer, 14 is a fixed hook, 15 is a movable hook, 20 is a hook body,
22 is a movable hook piece, 25 is a connecting link, 28 is a swing link, 29 is a wire, 30 is a return lever, and 37 is a handle.

Claims (1)

[Scope of utility model registration request] In a stretcher mounted on an ambulance, a movable hook is attached to an elevating frame mounted on the ambulance, and this movable hook consists of a hook main body with a U-shaped opening, and a movable hook piece with a hook piece at the tip. A movable hook piece is provided on the hook body via a shaft so as to be swingable, a connecting link is provided on the movable hook piece, a swinging link that swings by pulling a wire is connected to the connecting link, and A lashing and releasing device for a stretcher, which is provided with a return lever that swings when oscillated to prevent a locking rod provided on the stretcher from coming off.