JP2001129023A - Locking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reliable and all-purpose locking device by performing locking and its cancellation easily and rapidly with one hand. SOLUTION: An operation handle 6 is rotatably mounted to a mounting frame 2, and hook 8 is rotatably connected to the mounting frame 2 via an eccentricity cam 12. Also, by operating the operation handle 6, the hook 8 is rocked between a locking position and a locking cancellation position. Also, by rotating the eccentricity cam 12 via a linking mechanism, the rotary center of the hook 8 located at the locking position is lowered from the rotary center of the lock cancellation position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device which is mounted on a truck bed or an ambulance for transporting a patient or the like, and is suitable for fixing luggage on the bed or a stretcher for transporting the patient into the ambulance or the like. .

[0002]

2. Description of the Related Art A stretcher is used for transporting a patient to an ambulance, and after being transported into the ambulance, the stretcher is placed on an anti-vibration table or the like. Is common.

[0003]

The conventional stretcher locking device generally employs a ratchet mechanism. When locking the stretcher, the hook is raised and advanced to lock the ratchet mechanism while releasing the lock. In this case, it was necessary to remove the claws and retract the hook.

[0004] Therefore, it is necessary to use both hands inevitably, and not only operation is troublesome, but also locking and unlocking cannot be performed quickly.

Various lock devices have also been proposed for fixing loads loaded on a truck bed. However, there have been few general-purpose lock devices capable of fixing a stretcher or another device.

The present invention has been made in view of the above-mentioned problems of the prior art, and provides a highly reliable and versatile locking device which can perform locking and unlocking easily and quickly with one hand. It is intended to provide.

[0007]

In order to achieve the above object, according to the present invention, an invention according to claim 1 includes a mounting frame, an operation handle rotatably mounted on the mounting frame, and A hook rotatably connected to the mounting frame via an eccentric cam, and operating the operation handle to swing the hook between a lock position and an unlock position, thereby causing the eccentric cam to move. A lock device wherein a rotation center of a hook at a lock position is lowered from a rotation center of a lock release position by rotating through a link mechanism.

According to a second aspect of the present invention, a long hole is formed in the hook, and a swing shaft connected to the operation handle via an arm is loosely inserted into the long hole. And

Further, according to a third aspect of the present invention, the hook is locked by forming a concave portion in the arm and fitting a lock pin slidably attached to the operation handle into the concave portion. The lock is released by detaching the lock pin from the recess.

According to a fourth aspect of the present invention, there is provided an unlocking handle slidable with respect to the operating handle,
The lock pin is projected from the lock release handle.

According to a fifth aspect of the present invention, an elastic member is locked to the operation handle, and the urging force of the elastic member is applied in the opposite direction to the hook at the unlocked position and the hook at the locked position. It is characterized by having acted.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A lock device according to the present invention will be described below with reference to the drawings, taking as an example a case in which the lock device is mounted in an ambulance and used to fix a stretcher for transporting a patient.

FIG. 1 and FIG. 2 show a stretcher anti-vibration table mounted in an ambulance. The stretcher on which the patient is placed is mounted, and the vibration input to the stretcher is absorbed (vibrated). And reduce the burden on the victim.

As shown in FIGS. 1 and 2, the stretcher anti-vibration table includes a front locking device FL and a rear locking device R.
L, and after placing the stretcher on which the patient is placed in the unlocked state shown in FIG. 1, as shown in FIG. 2, the front part and the rear part of the stretcher are connected to the front locking device FL and the rear part. The stretcher is fixed by locking with the lock device RL.

The lock device L according to the present invention can be used, for example, as the above-mentioned rear lock device RL.

As shown in FIGS. 3 to 8, the lock device L is provided with a mounting frame 2 mounted on a stretcher anti-vibration table.
A substantially U-shaped operation handle 6 rotatably mounted via a rotating shaft 5 to a pair of substantially parallel mounting portions 4 provided at the center of the mounting frame 2 and a stretcher. And a hook 8 for locking.

The hook 8 is rotatably mounted on a bracket 10 screwed to the mounting portions 4 and 4 via an eccentric cam 12, and an elongated hole 8a is formed in an intermediate portion thereof. A swing shaft 14 is loosely inserted into the elongated hole 8a. Both ends of the swing shaft 14 are pivotally connected to one ends of the first arms 16, 16, and the other ends of the first arms 16, 16 are It is pivotally attached to the operation handle 6 by mounting bolts 19, 19 together with one ends of the second arms 18, 18. Second arm 1
The other ends of the first and second arms 8 and 18 are pivotally connected to one ends of the third arms 20 and 20, respectively.
Is fixed to a connecting shaft 22 connected to the connecting shaft.

Further, concave portions 16a, 16a into which lock pins (described later) are fitted are formed in the outer peripheral portions of the first arms 16, 16 in the vicinity of the mounting bolts 19, 19, respectively.

Further, the hook 8 near the eccentric cam 12 is provided with a spring locking portion 24, and the torsion spring 2 having one end locked to the spring locking portion 24.
The other end of 6 is locked to the mounting frame 2. The hook 8 is urged in the direction of arrow A at the unlocked position by the elastic force of the torsion spring 26, and is urged in the direction opposite to arrow A at the locked position.

Reference numerals 28 and 30 denote spacers, respectively.

A substantially U-shaped unlocking handle 32 is provided inside the operating handle 6, and the mounting bolt 1 is provided.
9 and 19 are loosely inserted into long holes (not shown) formed in the unlocking handle 32, and lock pins 3 are provided near the long holes.
4, 34 protrude inward. The lock release handle 32 is further provided with other long holes 32a, 32a. The lock release handle 32 slides on the operation handle 6 through the pins 36, 36 loosely inserted into the long holes 32a, 32a. It is movably mounted.

The grip portion 32b of the unlocking handle 32 extends substantially parallel to the grip portion 6a of the operating handle 6, and the lower end portions 32c, 32c of the unlocking handle 32 (opposite to the grip portion 32b). Side end)
, One end of a coil spring (not shown) is locked, and the other end of the coil spring is locked to pins 38, 38 implanted at the lower end of the operation handle 6.

Adjustment bolts 40, 40 are provided on both sides of the mounting frame 2, and elongated holes 2 extending parallel to the adjusting bolts 40, 40 are provided in the mounting frame 2 inside the mounting bolts.
a, 2a are drilled. Further, the long holes 2a, 2
The fixing bolts 42, 42 loosely inserted in “a” are held by mounting tabs 44, 44 screwed with the adjusting bolts 40, 40.

The operation of the lock device L according to the present invention having the above configuration will be described below with reference to FIGS. 9 and 10 in addition to FIGS.

When the lock of the stretcher is released, as shown in FIG. 1, the entire lock device L is housed below the upper surface of the stretcher anti-vibration table so as not to hinder the taking in and out of the stretcher. I have.

At the time of unlocking, as shown in FIGS. 3 to 5, the operating handle 6 is depressed, and the unlocking handle 32 is lowered together with the operating handle 6,
The grip portion 32b is a grip portion 6 of the operation handle 6.
a. At this time, hook 8 is
The first arms 16, 16 are held substantially horizontally via link mechanisms such as the arms 16, and the side portions of the first arms 16, 16 are in contact with the lock pins 34, 34.

The center of rotation of the eccentric cam 12 (the connecting shaft 2)
2 (a in FIG. 10) is lower than the center of rotation of the hook 8 (center of the circular hole in which the eccentric cam 12 is loosely inserted (b in FIG. 10)). The hook 8 is urged in the direction of arrow A by the elastic force of the torsion spring 26 as an elastic member in a state where the hook 8 is located above the long hole 8a.

When the stretcher carrying the patient is transported into the ambulance and placed on the anti-vibration table, and the stretcher is locked, the grip 6a of the operation handle 6 is lifted as shown in FIG. And unlock handle 3
2 lifts at the same time. At this time, since the swing shaft 14 loosely inserted in the intermediate portion of the hook 8 rotates in the direction of arrow B, the hook 8 rotates toward the lock position (standing position).

FIG. 9 shows the state immediately before the idea point.
The elastic force of the torsion spring 26 acts on the rotation center of the hook 8 at the thought point, and the elastic force of the torsion spring 26 acts in the direction of the arrow A on the unlocked position side from the thought point, while the locking position moves from the thought point. Arrow A on the side
In the opposite direction (B direction).

Therefore, when the operating handle 6 is further lifted and the hook 8 passes through the conceivable point, the elastic force of the torsion spring 26 acts in the direction of arrow B as described above, and the swing shaft 14 further extends the length of the hook 8. Hole 8a
The hook 8 rotates rapidly in the direction of arrow B, and the tip (lock portion) of the hook 8 comes into contact with the locked portion of the stretcher. At this time, the swing shaft 14 is located at the end of the elongated hole 8a on the grip 6a side.

When the operating handle 6 is further lifted from this state, the swing shaft 14 moves along the long hole 8a to the locked position shown in FIG. Recesses 16a, 1 formed on the side
The lock pins 34, 34 are fitted into 6a. At this time, the unlocking handle 32 is moved and held by the urging force of the coil spring locked at its lower end to the position furthest away from the grip portion 6a of the operation handle 6.

The operation handle 6 moves from the unlocked position (the state shown in FIGS. 3 to 5) to the locked position (the state shown in FIGS. 6 to 8 or 10) via the state shown in FIG. In addition, the eccentric cam 12 includes the second and third arms 1.
The motor rotates approximately half a revolution through 8, 18, 20, and 20. Therefore, the rotation center of the eccentric cam 12 located below the rotation center of the hook 8 at the lock release position is located above the rotation center of the hook 8 at the lock position. 8 is gradually lowered by the action of the eccentric cam 12 to securely lock the locked portion (not shown) of the stretcher,
The lock is not released by external vibration due to the fitting of the lock pins 34, 34 into the recesses 16a, 16a.

In order to release the lock of the stretcher, the user grips the grip 6a of the operation handle 6 and the grip 32a of the unlock handle 32, and moves the grip 32a closer to the grip 6a against the urging force of the coil spring. Then, the lock pins 34, 34
6 and 16 are removed from the concave portions 16a.

Thereafter, when the operation handle 6 is lowered together with the lock release handle 32, the hook 8 rotates around the eccentric cam 12 via the link mechanism, and reaches the lock release position.

The lock device L is fixed to the stretcher anti-vibration table by fixing bolts 42, 42. The fixing bolts 42, 42 are elongated holes 2a, 2a of the mounting frame 2.
Adjustment bolts 40, 4
By rotating 0, the front-rear position can be appropriately adjusted, and the variation of the stretcher can be absorbed, and the stretcher can be reliably locked.

In the above embodiment, the lock release handle 32 is biased toward the lock position by the tension spring. However, the grip 6a of the operation handle 6 and the lock release handle 32 are replaced with the tension spring. A compression spring may be provided between the grip portion 32b and the grip portion 32b.

[0037]

Since the present invention is configured as described above, it has the following effects. According to the first aspect of the present invention, the hook is swung between the lock position and the unlock position by operating the operation handle, and the eccentric cam is rotated via the link mechanism. As a result, the rotation center of the hook at the lock position is lowered from the rotation center of the unlock position, so that the lock can be reliably performed.

According to the second aspect of the present invention, a long hole is formed in the hook, and the swing shaft connected to the operation handle via the arm is loosely inserted into the long hole. The hook can be quickly moved toward the lock position.

According to the third aspect of the present invention,
The lock is hooked by inserting a lock pin slidably attached to the operation handle into a recess formed in the arm, while the lock is released by removing the lock pin from the recess. Locking or unlocking can be quickly performed by a simple operation.

According to the fourth aspect of the present invention, since the lock pin protrudes from the lock release handle slidably provided on the operation handle, the lock release handle can be operated with only one hand. Locking or unlocking can be performed with a simple operation.

According to the fifth aspect of the present invention, the urging force of the elastic member locked by the operation handle is applied to the hook at the unlock position and the hook at the lock position in opposite directions. As a result, locking or unlocking can be quickly performed, and the hook can be reliably held at the unlocked position or the locked position.

[Brief description of the drawings]

FIG. 1 is a perspective view of a stretcher anti-vibration table to which a lock device according to the present invention is applied, when a lock is released.

FIG. 2 is a perspective view of the stretcher anti-vibration table of FIG. 1 when locked.

FIG. 3 is a perspective view of the lock device when the lock is released.

FIG. 4 is a perspective view of a part of the lock device of FIG. 3 cut away;

5 is another perspective view in which a part of the lock device of FIG. 3 is cut away.

FIG. 6 is a perspective view of the lock device when locked.

FIG. 7 is a perspective view of the lock device of FIG. 6 with a part cut away.

FIG. 8 is a plan view of the lock device of FIG. 6;

FIG. 9 is a side view with a part cut away for explaining the operation of the lock device.

FIG. 10 is another side view, partly cut away, for explaining the operation of the lock device.

[Explanation of symbols]

 Reference Signs List 2 mounting frame 2a long hole 4 mounting portion 5 rotating shaft 6 operating handle 6a grip portion 8 hook 10 bracket 12 eccentric cam 14 swing shaft 16 first arm 16a recess 18 second arm 19 mounting bolt 20 third arm 22 connecting shaft 24 Spring locking portion 26 Torsion spring 28, 30 Spacer 32 Lock release handle 32a Long hole 32b Grip portion 34 Lock pin 36, 38 pin 40 Adjust bolt 42 Fixing bolt 44 Mounting tab L Lock device

Claims (5)

[Claims] An operating handle rotatably attached to the mounting frame; and a hook rotatably connected to the mounting frame via an eccentric cam, wherein the operating handle is operated. By rotating the hook between the lock position and the unlock position by rotating the eccentric cam via the link mechanism, the rotation center of the hook at the lock position is lowered from the rotation center of the unlock position. A locking device characterized by having been made. 2. The lock device according to claim 1, wherein an elongated hole is formed in the hook, and a swing shaft connected to the operation handle via an arm is loosely inserted into the elongated hole. 3. A recess is formed in the arm, and the hook is locked by fitting a lock pin slidably attached to the operation handle into the recess, while removing the lock pin from the recess. The lock device according to claim 2, wherein the lock is released by causing the lock to be released. 4. The lock device according to claim 3, wherein a lock release handle slidable with respect to the operation handle is provided, and the lock pin projects from the lock release handle. 5. An elastic member is locked to the operation handle,
The lock device according to any one of claims 1 to 4, wherein the urging force of the elastic member is applied to the hook at the unlock position and the hook at the lock position in opposite directions.