JPH0454065Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to an improvement of a locking fitting in a device for vertically holding and fixing the swing of a truck loading platform.

(Prior Art) A conventional lock device will be explained with reference to FIG. FIG. 2 shows a locking device c for fixing the swing b to the torii gate a of the truck bed. A locking device c to which a hook d is fixed is provided on the side of the torii gate a, and a backing plate f having a notch e is protruded on the side of the tilt b. When tilt b is rotated, the notch e of the backing plate f is placed on the hook d, and the latch 5 of the locking device c is placed on the hook d.
Tighten and lock.

By the way, in the conventional locking device c, when the swing b is not tightened and fixed, that is, when the swing b is open, the ring hook 5a of the latch 5 rotates outward and becomes in a protruding state. It was dangerous to get caught in it during cargo handling work.

Before explaining the present invention, the conventional type which is the basis thereof will be explained in more detail with reference to FIG. 3 and subsequent figures.

As shown in Figure 3, the lock fitting L is
It consists of a pedestal 3 to which a mold hook 1 is fixed, a support piece 2 slightly lower than the base 3, a handle 4 pivotally supported by the support piece 2, and a latch 5.

The latch 5 includes a ring hook 5a and a ring hook 5a.
It consists of a spring 5b inserted into the shaft portion of the spring and a spring receiver 5c. The spring receiver 5c is provided with a pair of protrusions 5d on the left and right sides of a rectangular plate, and these protrusions 5d are fitted into elongated holes 6a provided in the bracket 6. The protrusion 5d is the latch 5
acts as a guide. A hole 5e into which the shaft of the ring hook 5a loosely fits is formed in the center of the spring receiver 5c.

A pin 5f is driven into the shaft portion passing through the spring receiver 5c to prevent it from coming off the rectangular plate.

The bracket 6 is formed by bending a steel plate into an elongated U-shape, and its open end is narrow enough to hold the handle 4. The tip of the handle 4 is pivotally supported on the branch 2 of the base 3 by a pin 7, and is pivotally connected to a bracket 6 at a position slightly apart from the pin 7 by a pin 8.

As shown in FIG. 3, the lock fitting L has a gap of distance X between the upper end of the handle 4 and the lower end of the shaft of the ring hook 5a. Therefore, the locked state of the latch 5, that is, the L-shaped hook 1 and the ring hook 5a.
The handle 4 is rotated upward from the engaged and tightened fixed state (solid line position in Fig. 4) to the unlocked state in which the L-shaped hook 1 and the ring hook 5a are disengaged (Fig. 4). When the handle 4 is pushed down after the handle 4 is in the position 1), the latch 5 also shifts its position, rotates downward, and comes to rest diagonally downward (the position shown in FIG. 4). In this state, the latch 5 protrudes from the side edge of the loading platform, making it dangerous to get caught in it during cargo handling operations.

(Problems to be Solved by the Invention) The present invention attempts to eliminate the above-mentioned problems of the prior art and the associated dangers, and the latch 5 of the locking fitting L is not fixed even when the tilt b is open. To provide a lock fitting that does not protrude laterally from the side end of a loading platform.

(Solution by invention) A pedestal with an L-shaped hook fixed to the upper part and a branch piece fixed to the lower part, and a U-shaped bracket which is pivotally attached to the branch piece with a pin and is further attached to a U-shaped bracket at a position slightly apart from the pin. A handle pivotally connected with a pin, a ring hook whose shaft passes through the top of the U-shaped bracket, a spring attached to the shaft of the ring hook, and an end of the shaft of the ring hook that supports the handle. In a locking device comprising a latch made of a spring receiver whose protrusion is loosely fitted into a long hole of the bracket, the latch is rotated above the handle to position the handle substantially in a straight line. When this is done, the upper end of the handle and the lower end of the shaft of the latch are held in contact with each other under the force of the spring.

(Embodiment of the invention) In order to prevent the latch 5 from protruding outward even when the lock is not locked, the latch 5 is arranged so that it is approximately in a straight line with the handle 4 at the final stage of rest. The structure has been improved so that it rests upward and does not protrude from the side edge of the loading platform.

To explain with reference to FIG. 1, in the conventional structure, even when the handle 4 and the hook 5 are placed in a substantially straight line, the upper end of the handle 4 and the ring hook 5a
There was a gap of distance X from the lower end of the axis,
In this invention, it is set to zero. This makes it possible to prevent the latch 5 from protruding.

That is, in the unlocking stage of the lock fitting L, 1) the handle 4 is rotated upward to disengage the L-shaped hook 1 and the ring hook 5a; 2) When the handle 4 is returned downward, the latch 5 is also rotated downward and comes to rest diagonally downward (position a in FIG. 1).

Therefore, when the latch 5 is held and rotated upward, the ring hook 5a is attached to the upper end of the handle 4 in the final stage.
The lower end P of the shaft is engaged. At this time, a downward spring force is applied to press the upper end of the handle 4 to ensure engagement. For this reason, the latch 5 is positioned above the handle 4 in a substantially straight line with the handle 4.
is held at rest, so it does not protrude outward.

(How to improve the conventional structure) The handle 4 is improved without making any modifications to the shaft of the ring hook 5a. In other words, the distance from the rotation center O of the handle 4 to the tip of the handle 4 Y'+X
The tip of the handle 4 may be improved so that (Y': the distance from the center of rotation to the tip of the handle in the conventional type, X: the gap between the lower end of the shaft of the ring hook and the tip of the handle). The tip of the handle 4 and the lower end of the shaft of the ring hook 5a are both formed flat so that they can come into surface contact.

(Effect) After disengaging the L-shaped hook 1 and ring hook 5a and letting the handle 4 hang down, the latch 5 is rotated above the handle 4 so that it is positioned approximately in a straight line with the handle 4. When this is done, the upper end of the handle 4 and the lower end of the shaft of the latch 5 are brought into contact under the action of a spring force, so that the latch 5 is prevented from falling forward. As a result, the latch 5 does not protrude from the side edge of the loading platform at all, thereby preventing danger during cargo handling.

[Brief explanation of drawings]

FIG. 1 shows the locking device of the present invention. FIG. 2 is a perspective view of a conventional locking device. Figure 3 is a front view of a conventional lock fitting. Figure 4 is also a side view. FIG. 5 is a perspective view of the spring receiver and its guide mechanism. FIG. 6 also shows the relationship between the upper end of the handle and the lower end of the shaft of the latch. In the diagram, a... Torii, b... Aori, c...
...Lock device, d...Hook, e...Notch, L
... Lock fitting, 1 ... Hook, 2 ... Branch piece, 3
...Pedestal, 4...Handle, 5...Latch,
5a...ring hook, 5b...spring, 5c...
...Spring holder, 5d... Protrusion, 5e... Hole, 5
f...Pin, 6...Bracket, 7...Pin, 8
……pin.

Claims (1)

[Scope of utility model registration request] An L-shaped hook 1 is fixed to the upper part, and a support piece 2 is attached to the lower part.
a handle 4 which is pivotally connected to the support piece 2 with a pin 7, and further pivoted with a pin 8 to a U-shaped bracket 6 at a position slightly apart from the pin 7; A ring hook 5a having a shaft 5g passing through the top of the bracket 6, a spring 5b attached to the shaft 5g of the ring hook 5a, supporting the end of the shaft 5g of the ring hook 5a, 6, the latch 5 comprises a spring receiver 5c whose protrusion 5d is loosely fitted into an elongated hole 6a of the locking device 6;
When the handle 4 is rotated above the handle 4 so that it is positioned substantially in line with the handle 4, the upper end of the handle 4 and the lower end of the shaft of the latch 5 are held in contact with each other under the force of the spring. A locking metal fitting for a tilting mechanism.