JPH0529312Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is designed to prevent damage to the square shaft of the lock case when an excessively shocking torque is applied to the lever handle. This invention relates to a lever handle device that includes an impact force absorption mechanism for preventing damage between the lever handle and the shaft.

[Conventional technology]

In conventional lever handle devices, the square shaft of the lock case is directly connected to the lever handle, and the torque applied to the lever handle is directly transmitted to the square shaft of the lock case.

[Problem that the invention attempts to solve]

When the door is unlocked, the square shaft of the lock case is in a state where it can rotate together with the lever handle, and when torque is applied to the lever handle, the square shaft rotates with an extremely light load and locks the latch bolt etc. into the door. This prevents overload from being applied to the corner parts of the lock case, but when the door is locked, the corner shaft is prevented from rotating, and in such a case, a person attempting to open the door would have to press the lever. When the handle is operated violently, the excessive impact load applied to the lever handle is directly applied to the square shaft and the parts of the lock that restrict the movement of the square shaft, and there is a risk that the lock will be damaged.

The present invention has been made to solve these problems.

[Means for solving problems]

The main purpose of this invention is to make the lever handle compact between the square shaft and to provide a shock absorbing function that operates smoothly and reliably.The cam lock case is housed in the rose and rotates together with the lever handle. A side surface spring locking piece is provided protrudingly, and a spring is mounted on both sides of the spring locking piece to clamp the both sides with both legs, and the lever is attached to the cam plate fitted on the square shaft. A spring engaging portion protruding toward the handle is provided, and the spring engaging portion is configured to be inserted into a space formed by both legs of the spring and the spring locking piece.

[Effect]

With the above configuration, the lever handle device moves as follows.

(When unlocking) When the lever handle is turned, the cam rotates together with the lever handle, and the spring that clamps the spring locking piece of the cam rotates together with the cam, and the spring locking piece is engaged with the spring legs and the spring locking piece. The rotational torque is transmitted to a cam plate having a spring engaging portion inserted into the space formed,
Since the square shaft rotates together with the cam plate, no shocking excessive load is applied to the square shaft.

(When locked) Since the square shaft cannot be rotated, the cam plate fitted to the square shaft cannot also be rotated.

When a shocking excessive rotational torque is applied to the lever handle in such a state, the rotational torque is transmitted to the cam, and the spring locking piece of the cam presses one leg of the spring.

The other leg of the spring is restrained by the spring engagement part of the cam plate, so the spring expands the gap between both legs to absorb the impact force and protect the square shaft inside the lock case from the impact force. .

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

The first is a horizontal sectional view of the lever handle device, the second
The figures are a XX sectional view of FIG. 1, FIG. 3 is a side view, and FIG. 4 is a perspective view of the main components.

In FIG. 1, the lever handle 1 has a shaft portion 1a.
is inserted into the center hole 2a of the rose 2 attached to the side of the door D.

The rose 2 has a cam accommodating chamber 3 formed in a circular recess on the surface facing the door D, and two stoppers 4 are protruded from the inner peripheral surface of the cam accommodating chamber 3 to face each other. Two spring bearings 5 are protruded from approximately the middle of the lever handle 1 (see Fig. 2).The tip of the shaft portion 1a of the lever handle 1 is carved with mutually parallel flat portions 1b at opposing positions on the outer circumferential surface. A cam 6 having a hole 6a of the same shape is fitted into the tip thereof.

As shown in FIGS. 2 and 4, the cam 6 has a ring-shaped peripheral wall 7 and a vertical wall 8 attached to one end of the peripheral wall 7, and has opposing positions on the outer peripheral surface of the peripheral wall 7. A spring receiver 9 is provided on the inner peripheral surface of the peripheral wall 7, and a spring locking piece 10 is provided on the inner peripheral surface of the peripheral wall 7.

The cam 6 is housed in the cam housing chamber 3, and is fixed to the shaft portion 1a by a snap ring 12 that fits into a groove 11 carved in the outer peripheral surface of the shaft portion 1a of the lever handle 1.

Then, the cam pressing spring 13 is inserted between the two spring receivers 9 and the two spring receivers 5.

Therefore, the cam 6 is housed in the cam housing chamber 3,
It is rotatable together with the lever handle 1, and is biased by a cam pressing spring 13 in a direction in which the spring receiver 9 comes into contact with the stopper 4.

Both legs 14a, 1 are provided on both sides of the spring locking piece 10.
A spring 14 is attached to clamp both sides at 4b.

The spring 14 is wound into a ring shape and has both ends protruding outward to form both leg portions 14a and 14b. A small space is formed between them.

In FIG. 1, a cam plate 16 having a square hole is fitted into a square shaft 15 that is fitted into a square hole in a hub A of a lock case C shown by a dashed line (see FIGS. 1 and 4).
(see figure).

As shown in FIG. 4, the square shaft 15 has the shape of a square prism, and has a disk-shaped spring support portion 1 on one end surface.
5a, and a cam plate stopper 15b is provided to protrude from the edge of the side surface on the side of the spring support portion 15a.

Therefore, the cam plate 16 is connected to the cam plate stopper 15b.
Movement in the direction of the spring support portion 15a is restricted by this.

The cam plate 16 has a spring engaging portion 1 on the outer circumferential surface of a disk shape.
7 is bent and extended.

The bending direction of the spring engaging portion 17 is directed toward the cam 6, and the tip of the spring engaging portion 17 is inserted into the space between the stopper 4 and both legs 14a, 14b (see Figs. 2 and 3). reference).

A square shaft pressing spring 18 is sandwiched between the bottomed hole 1c provided in the end surface of the shaft portion 1a and the square shaft 15.
The square shaft 15 pressed by the square shaft pressing spring 18 is designed to maintain a small gap between the end surface of the shaft portion 1a of the lever handle 1 and the cam plate 16.

A female screw 19 is screwed into each of the two stoppers 4 provided on the rose 2, and a male screw 20a screwed onto one end of a screw rod 20 for tightening the rose is screwed into the female screw 19 to tighten the rose plate 21. Assemble to Rose 2.

The other end of the rose tightening threaded rod 20 has a female thread 20.
A bolt (not shown) screwed into the internal thread 20b is adapted to tighten a rose E attached to the opposite side of the door.

The operation of the lever handle device configured as above will be explained.

(When unlocked) When in the unlocked state, the square shaft 15 is rotatable.

Further, the spring receiver 9 of the cam 6 is pressed by the cam pressing spring 13 and comes into contact with the stopper 4, and the lever handle 1 that engages with the cam 6 is in a position where the grip portion is peeled off in the horizontal direction.

In this state, when the lever handle 1 is pushed down and rotated, the spring receiver 9 of the cam 6 rotates in the direction of the spring receiver 5 against the pressing force of the cam pressing spring 13, and the spring locking piece 10 of the cam 6 rotates. presses the leg portion 14b of the spring 14 in the rotating direction.

Since the spring 14 clamps the spring locking piece 10, the remaining leg portion 14a rotates together with the spring locking piece 10, and the spring engaging portion 17 of the cam plate 16 is pressed by the leg portion 14a, causing the cam plate to close. 16 rotates together with the square shaft 15 in the same direction as the lever handle 1, and the hub A in the lock case C forces the latch bolt into the door, making it possible to open the door.

As described above, since the square shaft 15 is rotatable when unlocking, no impact load is applied to the square shaft 15.

(When locked) The square shaft 15 is restrained so as not to rotate, and the grip of the lever handle 1 is oriented horizontally.

In this state, when the lever handle is pushed down violently, the spring receiver 9 of the cam 6 rotates against the cam pressing spring 13, but the pressing force of the cam pressing spring 13 is weak and absorbs the impact force applied to the lever handle 1. It is not possible to do so, and a shockingly excessive torque is transmitted to the cam 6.

The spring locking piece 10 of the cam 6 presses the leg portion 14b in the rotational direction, but since the leg portion 14a is restrained by the spring engaging portion 17, the distance between the two leg portions 14a and 14b increases.

That is, the impulsive excessive torque of the lever handle 1 is absorbed by the spring 14 .

Thus, the square shaft 15 in the lock case and the square shaft 15
The parts that restrain the parts are prevented from being damaged.

〔effect〕

The present invention has the following effects.

(a) With the lever handle device of the present invention, conventional
Since parts such as the square shaft that are at high risk of breakage are protected from breakage, the lifespan of the locking/unlocking device is extended and its reliability is improved.

(b) The lever handle device has a simple structure and can be compactly packed inside the rose.

Furthermore, since the structure is simple, the lever handle mechanism is robust and has the advantage of being less likely to break down, and is also low in cost.

[Brief explanation of the drawing]

1 to 4 show embodiments of the present invention.
2 is a horizontal sectional view of the lever handle device, FIG. 2 is a XX sectional view of FIG. 1, FIG. 3 is a partially cutaway side view of the lever handle device, and FIG. 4 is a perspective view of the main components. A...Hub, C...Lock case, D...Door, 1
... Lever handle, 1a ... Shaft section, 2 ... Rose, 3 ... Cam accommodation chamber, 4 ... Stopper, 5 ...
...Spring holder, 6...Cam, 9...Spring holder, 10...
Spring locking piece, 13... Cam pressing spring, 14... Spring, 14a, 14b... Leg portion, 15... Square shaft, 1
6...Cam plate, 17...Spring engaging portion, 18...Square shaft pressing spring, 20...Rose tightening threaded rod, 21
...Rose plate.

Claims (1)

[Scope of utility model registration request] In a lever handle device that allows a door to be opened by rotating a square shaft fitted to a hub in a lock case using a lever handle into which a door rose is inserted, the lever handle is housed in the rose and rotates together with the lever handle. A spring locking piece is provided protrudingly on the lock case side surface of the moving cam, and springs are attached to both sides of the spring locking piece to clamp and press both sides with both legs, and the spring is fitted onto the square shaft. A spring engaging portion protruding toward the lever handle is provided on the cam plate, and the spring engaging portion is inserted into a space formed by both legs of the spring and the spring locking piece. A lever handle device consisting of.