JP2003176655A - Crescent lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crescent lock capable of increasing the effect of crime prevention resulting from a double lock, e.g. for the crescent lock provided to a sash window frame in a general house, an office or the like. <P>SOLUTION: In the crescent lock 1 having an auxiliary lock 4, an unlocking position in the auxiliary lock is located on a position separated from a mounting position of the crescent lock, and the auxiliary lock 4 is held in the unlocking position by hands and, the crescent lock 1 can not be unlocked unless an unlocking operation of a crescent 3 is made. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crescent lock provided on a window frame for a sash in, for example, a general house or an office.

[0002]

2. Description of the Related Art Conventionally, as a crescent lock generally used as a locking device for a sliding sash window, a crescent lock with a lock as shown in FIG. 7 or a crescent lock with a lock as shown in FIG. In addition, a latched crescent lock, or an interlocking type crescent lock as shown in FIG. 9B is known.

In the crescent lock with lock, as shown in FIGS. 7 to 8, a pedestal 21 is fixed by a mounting screw to a vertical frame 20 of an inner window of a dressing frame, and a locking member 22 is rotated on the pedestal 21. A crescent is attached so that it can move freely. On the other hand, a hook that engages with the lock member 22 is fixed to a vertical frame (not shown) of the outer window. Then, the lock member 2 is attached to the pedestal 21.
A knob 23 is provided to prevent the rotation of 2.

Since the crescent shown in FIG. 8 only engages and locks with a hook provided on the vertical frame of the outer window, if a part of the window glass is broken, the lever of the locking member 22 is driven by the driver 24 or the like. The lockable crescent lock is known as a double lock mechanism for preventing such fraud, because it is easily unlocked by pushing and rotating the portion 22a.

Further, the crescent lock 25 with the latch is provided.
At the summoning part in the draw sash window,
It is locked by the latch 26. Further, the interlocking type crescent lock 27 has a switch 29 on the vertical frame distant from the mounting position of the crescent 28, and the rotation of the crescent 28 is released by the operation of the switch 29 to rotate the crescent 28 in the unlocking direction. It can be done.

[0006]

However, in the above-described conventional crescent lock, for example, in the lock-type crescent lock, since the knob 23 is located in the immediate vicinity of the lock member 22, the glass is broken and the hand is inserted to easily release it. There is the inconvenience of being locked. Further, since the latched crescent lock 25 and the interlocking type crescent lock 27 have the mechanical parts and electric parts for the crescent inside the frame of the window frame,
There is a problem that it is difficult to easily replace the conventional crescent lock shown in FIG. 8 due to repair or the like. The crescent tablet according to the present invention has been proposed to solve such a problem.

[0007]

SUMMARY OF THE INVENTION The gist of the present invention to solve the above problems is to provide a crescent lock provided with an auxiliary lock, wherein the unlocking position of the auxiliary lock is the mounting of the crescent lock. That is, the lock cannot be unlocked unless it is at a position distant from the position and the crescent is unlocked by holding the auxiliary lock at the unlock position by hand.

The auxiliary lock includes an operating member provided at a position apart from a pedestal for supporting the crescent, and stopper means provided on the pedestal for preventing the crescent from rotating.
The connecting means for interlocking the operating portion and the stopper means, and the biasing means for biasing the stopper means in the rotation preventing direction of the crescent; and the auxiliary lock, the crescent. A reel that is provided inside a supporting pedestal and that is wound around a drum provided inside the pedestal and is pulled out from the pedestal to the indoor side, and the reel that is engaged with the reel and is pulled out. And at least engaging means for permitting rotation of the crescent in the unlocking direction.

According to the crescent lock of the present invention, in order to enable the unlocking operation of the crescent with the auxiliary lock,
It is necessary to operate the auxiliary lock with one hand (for example, the left hand) to bring it to the unlocked position, and hold the unlocked position. Therefore, the crescent must be unlocked by the other one hand (right hand), so that the crescent lock is unlocked by using both hands at the same time. In this way, even if you try to unlock the crescent by breaking the glass near the crescent lock with a special tool etc., you cannot insert both hands through the narrow hole, so it becomes difficult to unlock illegally from the outside of the window. Is. Moreover, since the unlocking position of this auxiliary lock is far from the mounting position of the crescent lock,
The hand must be inserted deeply into the room from the outside of the window, and in particular, unauthorized unlocking operation is difficult.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a crescent lock 1 according to the present invention will be described with reference to the drawings. To facilitate understanding of the invention, portions corresponding to those of the conventional example will be described with the same reference numerals as those of the conventional example.

A first embodiment of the crescent lock 1 is shown in FIG.
As shown in FIG. 2, a crescent 3 is provided on the side surface of the vertical frame 2 of the window on the indoor side, and the auxiliary lock 4 is provided at a position a below the crescent 3 and which is not directly visible from the outside of the window.
Is provided. A hook (not shown) that engages with the arcuate flange 3a (see FIG. 2A) of the crescent 3 is provided on the vertical frame 5 on the outside of the window.

Inside the vertical frame 2, as shown in FIG.
As shown in (B), a shaft 4b of a knob 4a which is an operation member of the auxiliary lock 4 is rotatably provided, and the shaft 4b has a rod-shaped or plate-shaped lever 4c which is rotated integrally with the shaft 4b.
Is projected.

One end of a rod-shaped or string-shaped connecting bar 4d, which is a connecting means, is connected to the tip of the lever 4c. As shown in FIG. 2B, the other end on the upper side of the connecting bar 4d is loosely fitted in an engaging hole provided at one end of a metal stopper 4e which is stopper means.

The stopper 4e is slidable in a cylindrical hole 3c provided in the pedestal 3b, and the other end 4
g is biased by the coil spring 4f, which is a biasing means, so as to project outward (rotational stop direction).

The other end 4g of the stopper 4e is shown in FIG.
As shown in (B), when the crescent lock is locked, it is inserted into the recess 7a provided in the cam 7 fixed to the rotation support shaft 3c of the crescent 3 to prevent the crescent 3 from rotating in the locking direction. is doing. The mechanism for preventing the rotation of the crescent 3 in the unlocking direction is not limited to the illustrated example, and various known mechanisms can be adopted.

In the auxiliary lock 4 according to the first embodiment, the stopper 4e is inserted into the cylindrical hole 3c only when the knob 4a is rotated in the unlocking direction, and the crescent 3 is rotated in the unlocking direction. Is acceptable. In other cases, the coil spring 4f always causes the stopper 4e to protrude from the cylindrical hole 3c, and the stopper 4e is biased in the direction in which the rotation of the cam 7 is blocked. The end 4g is fitted into the recess 7a and double-locked.

Therefore, in the method of using the crescent lock 1, first, when locking, the crescent 3 is simply rotated in the locking direction and is automatically double-locked by the coil spring 4f. When unlocking, turn the knob 4a with one hand in the unlocking direction, and while holding the knob 4a in the unlocking position, rotate the crescent 3 in the unlocking direction with the other hand to remove the flange 3a from the hook. To unlock. Since the knob 4a is not locked at the unlocked position, it is necessary to use both hands to unlock the crescent lock 1 of the sash window.

Thus, even if the glass near the crescent lock is torn from the outside of the window by a small amount to try to unlock it illegally,
Since the knob 4a of the auxiliary lock 4 cannot be seen from the outside, it cannot be easily unlocked. Even if the presence of the knob 4a is known, it is difficult to operate because it is located at the position a away from the crescent 3, and since both hands cannot be inserted, an unauthorized unlocking operation cannot be performed.

In the second embodiment of the present invention, as shown in FIGS. 4 to 6, the auxiliary lock 8 of the crescent lock 1a is provided inside the pedestal 3b for supporting the crescent 3, and the pedestal is described above. 3b is a flat plate type reel 8b which is wound around a drum 8a provided inside the pedestal 3b and is drawn out substantially horizontally from the pedestal 3b to the indoor side 9 and when the reel 8b is drawn out by engaging with the reel 8b. There is an engaging rod 8c which is an engaging means that allows the crescent 3 to rotate in the unlocking direction.

On the drum 8a, as shown in FIG.
There is a drum rotation shaft 8d that is directly or indirectly driven and transmitted from the drum 8a, a gear 8e is provided on the drum rotation shaft 8d, and a rack 8f that meshes with the gear 8e is provided on an engagement rod 8c. ing.

A recess 8g is provided at the lower end of the engagement rod 8c, and the recess 8g is provided with an engagement pin 8h and a coil spring 8i for biasing the engagement pin 8h downward.
A lid member 8j is screwed into the recess 8g so as to penetrate the engaging pin 8h downward, and is covered.

The engaging pin 8h projects downward from the recess 8g and contacts the step 7c of the cam 7b. When the reel 8b is pulled out to the room 9 side, the gear 8e rotates in the direction of the arrow in FIG. 6 via the drum rotation shaft 8d, and the engaging rack 8f raises the engaging rod 8c. .

As a result, even if the engagement pin 8h projects downward due to the urging force of the coil spring 8i, it does not contact the stepped portion 7c, and the unlocking direction of the cam 7b (the direction of the arrow in the figure). Is allowed to rotate. The mechanism that allows the rotation of the cam 7b by pulling out the reel 8b toward the room 9 side and rotating the drum 8a is not limited to the illustrated example, and other known methods are adopted. . When the reel 8b is pulled out, the reel 8b is automatically wound around the drum 8a.

In this auxiliary lock 8, the pedestal 3b is provided with the auxiliary lock 8, and the distance between the auxiliary lock 8 and the crescent 3 is almost the same, but the reel 8b.
Is pulled out toward the room 9 side and the cam 7b is pulled out until it can be rotated in the unlocking direction, the distance b from the crescent 3 to the reel unlocking position greatly increases. The reel 8b is a flat plate type and can be pulled out substantially horizontally. For example, even if the reel 8b is pulled out to the outside of the window, it is caught by the edge of the reel opening and cannot be pulled out.

In the method of using the crescent lock 1a according to the second embodiment, first, the crescent 3 is rotated in the locking direction regardless of whether the reel 8b is wound around the drum 8a. It can be locked by itself. Since the reel 8b is wound around the drum 8a, the engagement rod 8c is moved downward, and the engagement pin 8
h comes into contact with the stepped portion 7c, and rotation of the cam 7b in the unlocking direction is blocked. This brings you to the double lock state.

Next, for unlocking, as shown in FIG. 4, the reel 8b is pulled out substantially horizontally toward the room 9 with one hand.
In that state, rotate the crescent 3 in the unlocking direction with the other hand. Thus, using both hands, crescent lock 1
It unlocks a. Since the reel 8b is automatically wound around the drum 8a when the hand is released, it is necessary to hold the reel 8b with one hand in order to unlock the reel 8b.

Therefore, similarly to the first embodiment, even if the glass near the crescent lock 1a is torn from the outside of the window by a small amount to illegally unlock the auxiliary lock 8, the unlocking position of the reel 8b of the auxiliary lock 8 is changed to the crescent. Since it is located at a position b away from 3, it is difficult to operate, and since both hands cannot be inserted,
Unauthorized unlocking operation cannot be performed. Further, the crime prevention effect can be enhanced by simply replacing the conventional crescent lock and replacing the crescent lock 1a of the second embodiment without modifying the window frame.

[0028]

As described above, in the crescent lock according to the present invention, in the crescent lock provided with the auxiliary lock, the unlocking position of the auxiliary lock is at a position apart from the mounting position of the crescent lock. In addition, the auxiliary lock cannot be unlocked without manually holding the auxiliary lock at the unlocked position and at the same time the crescent is unlocked, which makes it difficult to unlock illegally and improves the crime prevention effect.

The auxiliary lock includes an operating portion provided at a position apart from a pedestal for supporting the crescent, a stopper means provided on the pedestal for preventing rotation of the crescent, and the operating portion and the stopper means interlocking with each other. The connecting means and the biasing means for biasing the stopper means in the rotation preventing direction of the crescent make it difficult to find the operating portion from the outside of the window, and the locked state of the crescent is released with only one hand. It is difficult and time-consuming to improve the crime prevention effect.

Further, the auxiliary lock is provided inside a pedestal for supporting the crescent, and the reel is wound around a drum provided inside the pedestal and pulled out from the pedestal to the indoor side, Since it has at least an engaging rod that engages with the reel and allows rotation of the crescent in the unlocking direction when the reel is pulled out, the crime prevention effect is improved and the conventional crescent lock is provided with the crescent lock according to the present invention. Can be easily replaced with a lock.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a usage state of a crescent lock 1 according to a first embodiment of the present invention.

FIG. 2 shows a crescent lock 1 according to the first embodiment of the present invention. FIG. 3 is a partially broken sectional view (A) showing the structure of the auxiliary lock 4 and an explanatory view (B) showing a schematic structure of the stopper means.

FIG. 3 is a front view (A) of a knob 4 of the crescent lock 1 according to the first embodiment of the present invention and a rear side detailed internal view (B).

FIG. 4 is explanatory views (A) and (B) of a usage state of the crescent lock 1a according to the second embodiment of the present invention.

FIG. 5 is a crescent lock 1a according to a second embodiment of the present invention.
2 is an internal schematic configuration diagram of FIG.

FIG. 6 is a crescent lock 1a according to a second embodiment of the present invention.
FIG. 3 is a schematic configuration diagram showing a schematic configuration of stopper means.

FIG. 7 is a perspective view of a conventional example of a crescent lock with an auxiliary lock in a use state.

FIG. 8 is an explanatory diagram showing an unauthorized unlocking operation for the crescent lock according to the conventional example.

FIG. 9 is an explanatory view (A) of a crescent lock according to the conventional example.
(B).

[Explanation of symbols]

1,1a Crescent tablet, 2 vertical frame,
3 Crescent, 3a flange,
3b pedestal, 3c cylindrical hole, 4
Auxiliary lock, 4a pick, 4b shaft, 4
c lever, 4d connecting bar, 4
e Stopper, 4f Coil spring,
4g other end, 7,7b cam, 7
a recessed portion, 7c stepped portion, 8 auxiliary lock, 8a drum, 8b reel, 8
c engagement rod, 8d drum rotation shaft, 8e gear, 8f rack, 8g recess, 8h engagement pin,
8i coil spring, 8j lid member,
9 indoors, 20 vertical frames,
21 pedestal, 22 lock member, 22
a lever part, 23 knobs, 24
Driver, 25 latched crescent tablets, 26 interlocking crescent tablets.

Continued front page    (72) Inventor Toshio Yamaguchi             1-21-11 Shinjuku, Chuo-ku, Chiba Toda Construction Co., Ltd.             Ceremony Company Chiba Branch (72) Inventor Masaru Yamashita             1-21-11 Shinjuku, Chuo-ku, Chiba Toda Construction Co., Ltd.             Ceremony Company Chiba Branch (72) Inventor Eiji Sato             1-21-11 Shinjuku, Chuo-ku, Chiba Toda Construction Co., Ltd.             Ceremony Company Chiba Branch (72) Inventor Takuto Nishimura             1-21-11 Shinjuku, Chuo-ku, Chiba Toda Construction Co., Ltd.             Ceremony Company Chiba Branch (72) Inventor Hajime Noguchi             1-21-11 Shinjuku, Chuo-ku, Chiba Toda Construction Co., Ltd.             Ceremony Company Chiba Branch (72) Inventor Hideki Saito             1-21-11 Shinjuku, Chuo-ku, Chiba Toda Construction Co., Ltd.             Ceremony Company Chiba Branch (72) Inventor Ichiro Yamamoto             1-21-11 Shinjuku, Chuo-ku, Chiba Toda Construction Co., Ltd.             Ceremony Company Chiba Branch

Claims (3)

[Claims] 1. A crescent lock provided with an auxiliary lock, wherein the unlocking position of the auxiliary lock is apart from the mounting position of the crescent lock, and the auxiliary lock is manually held at the unlocking position. At the same time, the crescent lock cannot be unlocked without unlocking the crescent. 2. An auxiliary lock comprises an operating member provided at a position apart from a pedestal for supporting a crescent, a stopper means provided on the pedestal for preventing rotation of the crescent, the operating portion and the stopper means. The crescent lock according to claim 1, wherein the crescent lock is composed of a coupling means for interlocking with each other and a biasing means for biasing the stopper means in a rotation blocking direction. 3. The auxiliary lock is provided inside a pedestal that supports the crescent, and is a reel that is wound around a drum provided inside the pedestal and is pulled out from the pedestal to the indoor side, and the reel. 2. The crescent lock according to claim 1, further comprising: an engaging unit that engages with and allows rotation of the crescent in an unlocking direction when the reel is pulled out.