JP4171089B2 - Locking device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a door locking device. More specifically, the present invention relates to an improvement of a type of locking device in which a sickle piece is provided on a dead bolt in order to prevent unauthorized unlocking more reliably.
[0002]
[Prior art]
As a conventional locking device of this type, a dead bolt that is guided in a horizontal direction and a sickle piece that is pivotally supported in the lock box are provided so as to be able to be engaged together in the engagement hole of the strike. The bolt is supported in the lock box and its tip is projected from the front plate of the lock box as the dead cam is turned by the cylinder lock or thumb turn. The space between the two can be linked by a linkage means composed of a set of an operating pin protruding from a dead bolt and a long hole provided in a sickle piece.
[0003]
And in the type of locking device in which such a dead bolt and sickle piece are provided side by side, when a click spring or a thought spring is provided as a dead cam positioning means, those springs provided between the dead cam and the lock box are: Usually, it is provided at a position sufficiently away from the cam portion so as not to interfere with the sickle piece that swings in a positional relationship that overlaps with the dead bolt.
[0004]
For this reason, the conventional lock device as described above has problems such as a problem in effectively using a limited space in the lock box, and a large lock box.
[0005]
[Problems to be solved by the invention]
The locking device of the present invention has been proposed for the purpose of incorporating dead cam positioning means into a dead bolt to reduce the overall size and to effectively use the space in the lock box.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a locking device according to the present invention includes a dead bolt guided so as to be movable in the horizontal direction in the lock box, and one end pivotally supported in the lock box. The dead bolt is fixed in the lock with the operation of the dead cam supported in the lock box and rotated by the cylinder lock or thumb turn. The dead bolt and the sickle piece are projected from the front plate of the box, and the dead bolt and the sickle piece are linked by a linkage means consisting of a pair of operating pins protruding from the dead bolt and a long hole provided in the sickle piece. A projecting piece is provided in the portion adjacent to the dead bolt, and on the other hand, a torsion spring having a loop at the center is engaged with one end of the dead bolt and the other end is brought into contact with the projecting piece of the dead cam. The loop so as to wound the locking pin serves as the actuation pin, than Te, characterized in that as the localization means Deddokamu can space effectively utilized in the lock box incorporating the deadbolt.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the drawings.
1 and 2, reference numeral 10 denotes a door, and 20 denotes a door frame facing the open side end of the door 10 or another pair of doors.
[0008]
Reference numeral 1 denotes a lock box fixed to the open side end of the door 10 with screws 91 or the like by imposition or engraving. The upper part in the lock box 1 is provided with a main fastening mechanism 30 which is a main part of the present invention. In addition, a temporary fastening mechanism 40 is provided in the lower portion.
[0009]
As is well known, the temporary fastening mechanism 40 includes a latch bolt 40a, a latch spring 40b, a retractor 40c with which a handle shaft (not shown) is linked, a return spring 40d, and the like. However, the temporary fastening mechanism 40 is not essential for the present invention. That is, the locking device according to the present invention may be the main tightening mechanism 40 alone.
[0010]
The main fastening mechanism 30 which is the main part of the locking device according to the present invention will be described. In the lock box 1, a common engagement of the strike 2 fixed to the door frame or other paired door 20 with screws 92 or the like is provided. A dead bolt 3 and a sickle piece 4 which are two locking members that are engaged with each other at the time of protrusion are provided along the entrance hole 21.
[0011]
The dead bolt 3 has a U-shaped cross section formed by bending a single plate material (see FIG. 3), and is guided linearly in a horizontal direction by an arbitrary guide means in the lock box 1. It is.
[0012]
The dead bolt 3 in the illustrated example is guided by a guide means 31 including a pair of protruding pieces and long holes, a protruding guide portion 32 in the lock box 1, a guide piece 33 fixed to the lock box 1, and the like.
[0013]
The sickle piece 4 is formed by superposing two plate materials, one end of which is pivotally supported by a pivot 41 in the lock box 1, and the other end of the sickle piece 4 is pivoted forward by the sickle piece 4. It is engaged with the dead bolt 3 which protrudes from the opening 11 of 1 and protrudes into the engaging hole 21 of the strike 2 at the same time.
[0014]
Most of the sickle piece 4 is fitted in the space 34 of the dead bolt 3 having a U-shaped cross section, and the operating pin 51 and the sickle projecting on the dead bolt 3 are provided between the dead bolt 3 and the sickle piece 4. They are linked by linkage means 5 consisting of a set of elongated holes 52 provided in the piece 4.
[0015]
Reference numeral 6 denotes a dead cam supported on the rear part in the lock box 1, and a cam part 61 at the tip thereof is engaged with a driven notch 35 having a V shape of the dead bolt 3. The dead cam 6 swings between a pair of stoppers 62 and 62 before and after protruding from the side plate of the lock box 1.
[0016]
Further, the dead cam 6 is linked to the inner cylinder and thumb turn (both not shown) of the cylinder lock mounted on the lock box 1, and rotates the key or thumb turn inserted into the cylinder lock clockwise or counterclockwise. Then, the dead cam 6 swings as indicated by an arrow P.
[0017]
As the dead cam 6 swings, the dead bolt 3 is linearly slid and displaced with respect to the lock box 1 as indicated by an arrow Q, and the tip of the dead bolt 3 protrudes from the front plate of the lock box 1.
[0018]
At the same time, the lock piece 4 linked to the dead bolt 3 by the linkage means 5 is oscillated and displaced as indicated by an arrow R about the pivot 41, and the other end (front end) similarly projects from the front plate of the lock box 1. Let them enter.
[0019]
In the present invention, a projecting piece 63 having a semicircular tip, for example, is provided integrally or separately at a portion of the dead cam 6 adjacent to the dead bolt 3.
[0020]
In the illustrated dead cam 6, as clearly shown in FIG. 5, a projecting piece 63 is formed integrally with a cam portion 61 extended in the radial direction so as to form a step.
[0021]
In addition, this locking device is provided with a torsion spring 7 having a loop at the center such as a torsion coil spring so as to correspond to the protruding piece 63 on the dead cam 6.
[0022]
The torsion spring 7 has one end locked in a locking groove 36 or the like formed in the dead bolt 3, the other end is brought into contact with the tip of the projecting piece 63 of the dead cam 6, and the loop is connected to the above-described linking means. 5, the dead cam 6 is mounted as a positioning means for clicking and localizing in the locking position or the unlocking position.
[0023]
【The invention's effect】
According to the locking device of the present invention described above, the torsion spring as a positioning means that clickably determines the locking position and the unlocking position of the dead cam regardless of the type in which the dead bolt and the sickle piece are provided side by side. However, one end is locked to the dead bolt, the other end is brought into contact with the dead cam protrusion, and the center loop is fitted into the locking pin that also serves as the operating pin, thereby making the dead bolt compact. Since it is mounted in a form to be attached, the limited space in the lock box is effectively used with the downsizing of the dead cam positioning means, and the enlargement of the lock box can be avoided. There is an effect.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of the locking device of the present invention with a cover plate as one side plate removed in a locked state.
FIG. 2 is a front view thereof.
3A and 3B are views showing a dead bolt removed from the lock device of FIG. 1, wherein FIG. 3A is a plan view, FIG. 3B is a side view, and FIG.
4A and 4B are diagrams showing a sickle piece removed from the locking device of FIG. 1, wherein FIG. 4A is a side view and FIG. 4B is a rear view.
5A and 5B are views showing a dead cam removed from the lock device of FIG. 1, in which FIG. 5A is a side view and FIG. 5B is a rear view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lock box 2 Strike 3 Dead bolt 4 Sickle piece 5 Coupling means 51 Pin 52 which also serves as an operation pin Long hole 6 Dead cam 63 Projection piece 7 Torsion spring

Claims (1)

It has a dead bolt guided so as to be movable in the horizontal direction in the lock box, and a sickle piece which is pivotally supported at one end in the lock box and installed together with the dead bolt so as to be able to be engaged together in the engagement hole of the strike. In this case, the dead bolt is supported in the lock box, and the tip of the dead bolt protrudes from the front plate of the lock box as the dead cam is rotated by a cylinder lock or thumb turn. The piece is linked by a linkage means consisting of a pair of operating pins protruding from the dead bolt and a long hole provided in the sickle piece. On the other hand, a protruding piece is provided at a portion close to the dead bolt of the dead cam, A torsion spring having a loop in the center is engaged with a dead bolt at one end, and the other end is brought into contact with a projecting piece of a dead cam, and the loop is wound around an engaging pin that also serves as the operating pin. To so that, following Te, the lock device being characterized in that as the localization means Deddokamu effectively utilizing the space in the lock box incorporating the deadbolt.

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