JPH08158718A - Double lock for sash - Google Patents

Abstract

PURPOSE: To improve burglarproofness by pivotally attaching a cam with a main lever to a pedestal while mounting a locking mechanism consisting of a combination lock and inhibiting the revolution of the cam with the main lever at the time of locking. CONSTITUTION: A cam 3 with a main lever is composed of a cam heightened towards the right, and engaged with a catch on the opposite side at the time of the locking of a sash. The projecting section 21 of a sliding piece 20 is fitted simultaneously into three notched engaging sections 13A, 13B, 13C under a locked state. A sign display board 15 and a counter mark are conformed and operated to a predetermined numeric or mark of three columns under the state, and selecting pieces 12A, 12B, 12C are rotated and displayed through three engaging projections 11A-11C. At least one engaging section does not permit the fitting of the projecting section 21, and the sliding piece 20 is retained at a specified place. Since a retaining section 22 is fixed into a cam groove, the cam 3 is not revolved even when the main lever 4 intends to be tuned, thus resulting in a release-impossible state. Accordingly, the release of an intruder can be made remarkably difficult.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a double lock for sashes,
More specifically, the present invention relates to a double lock for a sash that an intruder cannot easily unlock, while a family member can easily handle it.

[0002]

2. Description of the Related Art Conventionally, a so-called crescent lock having a pair of a cam with a lever and a catch is often used to lock a window sash mainly made of plastic such as steel, Al, Al alloy or hard PVC. ing.
The simplest of these is a pedestal, a lever-equipped cam pivotally attached to the pedestal by a caulked shaft, and a catch. Since it depends only on the frictional force, there is a risk of unlocking due to repeated stress from the outside if there is a slight gap.

As a countermeasure, various double locks for sashes have been developed. All of these are Crescent locks that can be unlocked for the first time by double action.For example, a push button is provided on the shaft part, and when unlocking the lock that is automatically double-locked, be sure to push the push button manually. It was able to be unlocked by rotating the cam with lever by pushing. As another conventional example, a slide protrusion is provided on the side surface of the pedestal and double locked by manual action (double action). There was also a rotating type. In addition, instead of the sliding protrusion, there is also one provided with a tubular knob that can be locked / unlocked by rotating forward / reverse a few times.

However, these conventional double locks do not have a sufficient counter force when an intruder such as a sneak-thief tries to open a window from the outside. In other words, this kind of conventional lock is supposed to be operated only from the inside, so if you break the glass near the lock from the outside and insert your hand, you can easily operate it even if you double-lock it. Since it can be locked, you can easily open the window in a very short time and can sneak in quickly, so it lacks the effect of deterring crime such as burglars, and there was a problem with the crime prevention effect.

According to the present invention, the crescent lock has a lock function and is used as needed when going out so that no one other than the related persons such as family members can easily unlock the lock.
A criminal with a criminal intention such as a burglary dramatically extends the time required to open a window from the outside, gives the criminal a feeling of frustration and fear of finding the crime, suppresses the crime in advance, and enhances the crime prevention effect. To do.

[0006]

OBJECT OF THE INVENTION It is an object of the present invention to provide a sash double lock which makes it more difficult for an intruder to unlock.

Another object of the present invention is to provide a sash double lock which improves the reliability and safety of the sash lock.

[0008]

According to the present invention, there is provided a double lock for a sash provided with a pedestal, a cam with a main lever, a shaft pivotally mounting the cam with the main lever on the pedestal, and a lock mechanism for stopping rotation of the cam with the main lever when locked. , A double lock for a sash (claim 1) characterized in that the lock mechanism is a combination lock, and the combination lock is 1
A double lock for a sash (claim 2) according to claim 1 which is a combination lock comprising at least one intermittently interlocking mechanism-equipped selection piece and a locking piece, and the axial direction and / or which are intermittently interlocked by the operation of the code display panel. Alternatively, by interlocking with a selection piece having a meshing portion that is overlapped in the radial direction and an auxiliary lever that is operated from the outside, or a locking piece that locks or releases the cam with the main lever by the initial rotation of the cam with the main lever. A double lock for a sash (claim 3) according to claim 2, further comprising: a sliding piece having a protrusion that is detachable with respect to the meshing portion of the selection piece.

The present invention will be described in detail below with reference to examples.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partial side sectional view of an embodiment (1) of the present invention, FIG. 2 is a sectional view taken along the line AA of the same embodiment (1), and FIG. 3 is a perspective view showing the action of a combination lock. 4 is a partial side sectional view of another embodiment (2), FIG. 5 is a bottom view of the same embodiment (2), FIG. 6 is a partial side sectional view of the embodiment (3), and FIG. 7 is another embodiment. Partial side sectional view of Example (4), FIG. 8 is a sectional view taken along line BB of FIG. 7,
FIG. 9 is a bottom perspective view of FIG.

1, 2, 3, 4, 5, 6, 7, 8, and 9, 1 is a base, 2 is a screw hole, 3 is a cam with a main lever, 4 is a main lever, 6 is a main shaft, and 7 Is an inner shaft, 8 is a locking mechanism, 9 is a C-shaped pin, 10 is a combination lock, 11A, 11B,
11C is a locking protrusion, 12A, 12B and 12C are selection pieces,
13A, 13B and 13C are meshing parts, 14 is an auxiliary lever,
Reference numeral 15 is a code display board, 16 is a knob, 17B and 17C are through holes, 20 is a sliding piece, 21 is a protruding portion, 22 is a locking portion, 2
3 is a long hole, 24 is a cam groove for driving the sliding piece, and 25 is a separator.

First, in FIG. 1, the base 1 is normally fixed by a screw which is bent 90 ° so as to be parallel to the side wall of the sash and is screwed through the screw holes 2 and 2. On the lever side when unlocking the base 1, there is provided a sliding piece driving cam groove 24 that opens to the upper surface, and the sliding piece 20 of the sliding piece 20 is held until the cam 3 with the main lever is rotated in the unlocking direction. The locking portion 22 is fitted. A cam 3 with a main lever is pivotally mounted via a shaft 6 at the center of the base 1. Further, at the center of the spindle 6, the spindle 6
And the upper selection pieces 12A, which penetrate the selection pieces 12B, 12C.
An inner shaft 7, which is extended and fixed to a code display board 15 and a knob (these are integrated), is pivotally mounted. The lower end of the inner shaft 7 is rotatably locked to the main shaft 7 by a C-shaped pin 9. The selection pieces 12A, 12
Between B and 12C, spring washer-shaped separators 25 and 25 are fitted in the groove 3A of the cam with the main lever so as to be vertically movable in order to prevent slipping around.

The sliding piece 20 is a hook-shaped metal plate in FIG. 1 and a whiskey bottle-shaped metal plate in FIG. 2, one end of which is a protrusion 21 and the other end of which is a locking portion 22. An elongated hole 23 is formed in the portion. Therefore, since the protrusion 21 and the locking portion 22 are integrated, they can slide in the horizontal direction (vertical direction when used) in FIGS. In FIGS. 1 and 2, the cam 3 with the main lever forms a cam that becomes higher toward the right side, and is integral with the main lever 4 and the main shaft 6 on the right side. This is usually made by die casting of Al, Al alloy, stainless steel or the like. The cam 3 engages with a catch (not shown) on the other side when the sash is locked.

Next, the lock mechanism, that is, the combination lock will be described in detail below.

In FIG. 3, a selection piece 12A (only this is integrated with the knob 16 and the code display board 15), 1
2B and 12C have notch-shaped engaging portions 13A, 13B,
13C is bored, and through holes 17B, 17C through which the inner shaft 7 fixed to the top of the selection piece 12A penetrates are bored in the center of the selection pieces 12B, 12C. The lower surface of the selection piece 12A has an engaging projection 11A and a through hole 17B.
To the through hole 17C and the engaging projection 11B to the through hole 17C.
C is provided for each. .

The operation of the combination tablet according to the present invention will be further described below.

First, in the unlocked state, the protrusion 21 of the sliding piece 20 is used.
Is only possible when they are simultaneously fitted into the three notch-shaped engaging portions 13A, 13B, 13C.

In this state, the engaging projections 11A, 11 are respectively operated by operating the code display board 15 and the matching mark (not shown) in accordance with a predetermined three-digit number or symbol.
The selection pieces 12A, 12B, and 12C appear as a result of each rotation via B and 11C. Normally, if there are 10 digit numbers or symbols and 3 digit combinations are used, almost 10 ³ combinations will appear.
The probability from the state to unlocking is about 1/1000, and it is virtually impossible to unlock in a short time unless the crescent tablet is broken. In the RANDOM state, at least one meshing portion does not allow the protrusion 21 to be fitted therein, so that the sliding piece 20 is stopped at the leftmost end in FIG.
Therefore, since the locking portion 22 is fixed to the left rear portion of the cam groove 24, the cam 3 with the main lever does not rotate even if the main lever 4 is rotated clockwise, and is unlocked. There is nothing.

When locking, the locking portion 22 is engaged with the cam groove 2 at the final stage of rotating the cam 3 with the main lever counterclockwise.
It is inserted in 4 and is introduced to the deepest part. Therefore, if the code display board 15 is appropriately turned clockwise or counterclockwise with the knob 16, the RANDOM state appears, and it is locked securely. FIGS. 4, 5, 6, 7 and 8 show other embodiments. FIG. 4 and 5 show an embodiment (2), and in FIG. 3 (embodiment (1)), the disc-shaped selection pieces 12A, 12B, 12C are cylindrical selection pieces, and sliding pieces are shown. The only difference is that the sliding direction of 20 is along the main axis direction. However, in this case, the cam groove 24 is not provided in the base 1, and the locking action is performed in the state of FIG. That is, in the RANDOM state, as shown in FIG. 9, the tongue-shaped engaging portion 22A, which is constantly hung by the coil spring 30 along the inner axis direction, is engaged with the pair of fixing members 33 fixed to the main shaft 6. This is done by stopping rotation. In principle, the unlocking prevention function is stronger than that of the embodiment (1), although it is structurally the same as that of the embodiment (1). In FIG. 4, the vertical sliding piece 20A having a key-shaped cross section is not allowed to freely rotate due to the spline or the key groove 36, and is only movable around the main shaft 6 in the vertical direction. For unlocking in this embodiment, after the combination lock is previously unlocked, the auxiliary lever 14 is manually operated in the unlocking direction,
In response to this, the cam 35 is executed by resisting the elastic force for hoisting and urging the coil spring 30. Locking is the opposite.

6 and 7 show another embodiment (3). These differ from the embodiment (2) in the vertical sliding piece 2
The 0A spline or keyway 36 has been eliminated, and the selection piece 12
The rotation of the selection piece 12B is stopped by integrating B with the cam 3 with the main lever, and the rotation is changed by the sliding piece 20A.
The rotation of the selection piece 12B is changed to the protrusion 21 of FIG. 4 and the operation is the same as that of the embodiment (2) of FIGS.

In the case of the embodiments (2) and (3), the memory number is 2.
Although it is a digit, it is the embodiment (4) shown in FIGS. This is one in which the selection piece 12B in FIG. 6 is made rotatable, and the one for CR is similar to the embodiment (2) in FIGS. In this case, since the protrusion 21 floats every time the numbers are matched, there are a plurality of recitation numbers, which is an advantage that any recitation number can be selected.

[0022]

By carrying out the present invention, all of the above objects can be achieved. That is, the unlocking operation by the intruder becomes more difficult, and the crescent lock that requires a long time is provided by the cordless unlocking, so that the safety is increased.

[Brief description of drawings]

FIG. 1 is a partial side sectional view of an embodiment (1) of the present invention.

FIG. 2 is a sectional view taken along line AA of the same embodiment (1).

FIG. 3 is a perspective view showing the action of the combination lock.

FIG. 4 is a partial side sectional view of another embodiment (2).

FIG. 5 is a bottom view of the embodiment (2).

FIG. 6 is a partial side sectional view of the embodiment (3).

FIG. 7 is a partial side sectional view of another embodiment (4).

8 is a sectional view taken along line BB of FIG.

9 is a bottom perspective view of FIG.

[Explanation of symbols]

 1 Base 2 Screw hole 3 Cam with main lever 4 Main lever 6 Main shaft 7 Inner shaft 8 Lock mechanism 9 C-type pin 10 Combination lock 11A Locking protrusion 11B Locking protrusion 11C Locking protrusion 12A Selection piece 12B Selection piece 12C Selection piece 13A Engagement part 13B Engagement part 13C Engagement part 14 Auxiliary lever 15 Code display board 16 Knob 17B Through hole 17C Through hole 20 Sliding piece 21 Projection 22 Locking part 23 Long hole 24 Sliding piece drive cam groove 25 Separator

Claims (3)

[Claims] 1. A double lock for a sash, comprising: a pedestal, a cam with a main lever, a shaft pivotally mounting the cam with the main lever on the pedestal, and a lock mechanism for stopping rotation of the cam with the main lever when locked, wherein a lock mechanism is provided. Double lock for sash, which is a combination lock. 2. The double lock for a sash according to claim 1, wherein the combination lock is a combination lock including one or more selection pieces with an intermittent interlocking mechanism and locking pieces. 3. A selection piece having a meshing portion overlappingly arranged in the axial direction and / or the radial direction, which is intermittently interlocked with the operation of the code display board, and an auxiliary lever operated from the outside.
Alternatively, the main lever-equipped cam is provided with a sliding piece that has a protrusion that is detachable with respect to the meshing portion of the selection piece in conjunction with a locking piece that locks or releases the main-lever cam by initial rotation. The double lock for sashes according to claim 2.