JP4438105B2 - Crime prevention device for this lock - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a security device for a lock lock.
[0002]
[Prior art]
A cam that is pivotally supported by the lock box so that it can be rotated by a thumb turn on the indoor side or a cylinder lock on the outdoor side, so that the dead bolt provided in the lock box attached to the door can be moved in and out of the front plate. A conventional lock formed by engaging the dead bolt with the dead bolt is well known.
[0003]
In such a lock, if a glass window is provided at or near the door itself to which the lock is attached, the window glass is broken during locking, and the thumb turn is rotated by the hand inserted from there. The door may be opened by correct unlocking.
[0004]
[Problems to be solved by the invention]
The crime prevention device for the present lock according to the present invention has been proposed in order to eliminate the unauthorized unlocking due to the thumb turn as described above.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention can be rotated by a thumb turn on the indoor side or a cylinder lock on the outdoor side in order to make a dead bolt provided in a lock box attached to the door appear and disappear from the front plate. In the final lock formed by engaging the dead bolt with a cam pivotally supported on the lock box, a clutch cylinder with a thumb turn shaft inserted into the inner end and a tail piece inserted into the outer end is provided. The cam is guided so that it can move relatively only in the axial direction, while the cross-sectional shape of the tail end of the tail piece is the same as that of the thumb turn shaft, and the outer end of the clutch cylinder is normally engaged with the tip of the tail piece. The clutch cylinder is biased toward the non-operating position, and the clutch cylinder is horizontally disposed in the lock box so that the outer end occupies an operating position where the outer end engages with the base end of the tailpiece. Movable A moving member is provided, and one end of the actuating member is made to face the opening provided in the front plate so that it can be operated directly or indirectly with fingers, and the other end side where the inclined cam is formed is connected to the clutch cylinder. It is characterized by being linked.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the drawings.
1 to 4, reference numeral 1 denotes a lock box attached to the door 10, 11 denotes a front plate of the lock box 1, 12 denotes a back plate thereof, and 2 denotes a strike plate attached to the door frame 20 or another door in the double door. , 21 respectively indicate engaging holes provided in the strike plate 2 for engaging the dead bolt 3.
[0007]
The dead bolt 3 provided in the lock box 1 is guided so as to be movable in the horizontal direction by the through-hole 13 of the strike plate 11 or an arbitrary guide means 31 and guided so as to be displaceable between the storage position and the protruding position. Has been.
[0008]
As shown in FIG. 1, the guide means 31 in the illustrated example is composed of a pair of a pin also serving as a support fixed to the lock box 1 and a long hole provided in the dead bolt 3, and the pin and the long hole are strokes of the dead bolt 3. Also plays a role as a stopper at both ends.
[0009]
A driven notch 33 with which an arm piece 42 of a cam 4 described later is engaged is formed at the rear portion of the side plate 32 constituting one side of the dead bolt 3.
[0010]
As shown in FIGS. 1 and 3, a cylinder portion 41 is formed at the center of the cam 4, and a clutch cylinder 5 in which a known clutch hole 53 is formed along the axis is slid in the cylinder portion 41. It is movably fitted.
[0011]
Both ends of the clutch cylinder 5 are rotatably supported on both side plates of the lock box 1, and at least one (three in the illustrated embodiment) passive pins 51 are implanted on the outer peripheral surface thereof. Yes.
[0012]
Each passive pin 51 is slidably passed through a long hole 46 (see FIG. 3) formed in the cylindrical portion 41 of the cam 4 along the generatrix direction . It is engaged in a movable state.
[0013]
Each set of the passive pin 51 and the long hole 46 also serves as a stopper for limiting the range of movement of the clutch piece 5 in the length direction (axial direction).
[0014]
The three passive pins 51 in the illustrated example are implanted in the clutch piece 5 at an appropriate angle in relation to the shape and position of an operation portion 84 in an operation member 8 described later corresponding thereto.
[0015]
With the configuration described above, the cam 4 is rotatably supported on the side plate of the lock box 1 via the clutch cylinder 5, and the clutch cylinder 5 slides with respect to the cam 4 in the axial direction for a certain distance. Relative movement is possible, but they are mutually restrained in the circumferential direction.
[0016]
In the illustrated embodiment, the above-described configuration is adopted in order not to make the cam 4 large. However, the cylindrical portion 41 is made thicker to form small-diameter step portions at both ends thereof, and the small-diameter step portions are formed on the lock box 1. The side plate may be pivotally supported.
[0017]
An integral arm piece 42 extending in the radial direction from the cylindrical portion 41, which should be called the body portion of the cam 4, is engaged with the driven notch 33 of the dead bolt 3.
[0018]
On the other hand, as shown in FIGS. 1 and 3, a thumb turn shaft 6 having a generally cross-shaped cross shape is fitted into the clutch hole 53 at the inner end of the clutch cylinder 5.
[0019]
Further, as shown in FIGS. 2 and 3, a tail piece 7 connected to an inner cylinder of a cylinder lock (not shown) is fitted into the clutch hole 53 in the outer end portion of the clutch cylinder 5.
[0020]
As shown in FIGS. 2 and 5, the base portion of the tail piece 7 is formed in a cross-shaped cross section like the thumb turn shaft 6.
[0021]
In FIG. 1B and FIG. 3, reference numeral 45 denotes a cam click means that is brought into contact with a triangular protrusion 44 integrally protruding on the cam 4, and the click means 45 has a cross section. A U-shaped swinging piece and a torsion spring for pressing the U-shaped swinging piece against the protrusion 44 of the cam 4 are configured.
[0022]
As shown in FIGS. 1 to 3, the characteristic configuration of the present invention is such that the tube portion 41 of the cam 4 is rotated in the rotational direction so that the base portion of the thumb turn shaft 6 and the tail piece 7 is connected or disconnected. Is that the clutch cylinder 5 which is restrained and movable only in the axial direction is mounted.
[0023]
The clutch cylinder 5 is biased by a compression coil spring or the like so as not to engage with the cross-shaped base of the cross section of the tailpiece 7 in a normal state in which the security device of the present invention is inactive (see FIG. 3). 54 is biased away from the tailpiece 7 (leftward in FIG. 3).
[0024]
On the other hand, the actuating member 8 for moving and displacing the clutch cylinder 5 between the engagement position and the non-engagement position with the base of the tail piece 7 is suitable guide means indicated by reference numeral 85 in the lock box 1, for example. It is provided so that it can be slidably displaced in the horizontal direction (front-rear direction).
[0025]
As shown in FIGS. 1, 4 and 6, the actuating member 8 is formed, for example, by bending a single plate material so as to be horizontally long, and an opening provided in the front plate 11 on one end side (front end side). 14 has a head portion 81 bent in a box shape so that it can be sealed in a normal state, and a sleeve 9 fixed to the lock box 1 and a cylindrical portion of the cam 4 so that a calling bolt can be passed through the other end. In order to allow the portion 41 to escape, it has leg portions 82 and 82 formed in a U shape.
[0026]
In the illustrated actuating member 8, reference numeral 83 indicates an operation hole for the operator to insert a finger, and reference numeral 84 indicates each leg 82 for displacing the clutch piece 5 via the passive pin 51. The operation | movement part which makes | forms the slope cam formed by bending the center part of the length direction of this to the inward mountain shape is shown.
[0027]
More specifically, the guide means of the actuating member 8 is a pair of the guide means 85 and the actuating member 8 consisting of a set of a guide long hole provided in the actuating member 8 and a pin fixed to the lock box 1 in the illustrated example. Although the guide means in which the inner sides of the leg portions 82 and 82 are in sliding contact with the body portion (shaft portion) 41 of the cam 4 is used, it goes without saying that other known guide means may be used. .
[0028]
Further, in the illustrated operating member 8, a finger is inserted into an operation hole 83 provided in the head 81 to directly operate the operating member 8, but a changeover switch or push button is provided at the opening portion 14 of the front plate 11. Etc., and the operating member 8 may be operated indirectly by linking the operating member 8 to the operating part piece.
[0029]
Next, the operation of the security device according to the present invention will be described based on the illustrated example.
FIGS. 1 and 3 both show a normal state in which the apparatus is in an inoperative state. As shown in FIG. 3, a thumb turn shaft 6 having a cross-shaped cross section is formed at the inner end of the clutch hole 53. Only the tip end portion of the tail piece 7 having an I-shaped cross section is fitted into the outer end portion.
[0030]
Since this state is the same as the engagement relationship of the thumb turn shaft, tail piece, and clutch hole in a normal locking lock, the locking and unlocking can be performed by either the thumb turn or the key inserted into the cylinder lock as in the conventional locking lock. It can be carried out.
[0031]
In order to put the crime prevention device according to the present invention into an operation state, as shown in FIG. 6, the door 10 is opened and a finger is placed on the front end of the operation member 8 through the opening portion 14 of the front plate 11 to operate the crime prevention device. The member 8 is pushed in as indicated by an arrow A.
[0032]
In this case, the actuating portion 84 forming a chevron actuation member 8 is, as shown in FIG. 8, in sliding contact with the small cloud one passive pins 51, the passive pin 51 together with the clutch cylinder 5 to which it is fixed In FIG. 8, the outer end of the clutch cylinder 5 is engaged with the base of the tail piece 7 having a cross-shaped cross section because it is pushed against the urging force of the urging means 7 into the right uncoupled position.
[0033]
In this operating state, the thumb turn shaft 6 and the tail piece 7 are integrally connected via the clutch cylinder 5, so that the inner cylinder of the cylinder lock does not move even if the thumb turn is turned by hand. Become.
[0034]
However, a resident or the like can lock the cam 4 by rotating the cam 4 by a predetermined angle (for example, 90 °) with a key inserted into the cylinder lock outside the room when going out (see FIG. 7). Of course, it can be unlocked.
[0035]
In this case, the thumb turn shaft 6 is connected to the inner cylinder of the cylinder lock via the clutch cylinder 5 and the tail piece 7, so that the thumb turn rotates every time the cylinder lock is operated. is there.
[0036]
In this operating state, as shown in FIG. 6, the passive pins 51, 51 at the angular positions of 12 o'clock and 6 o'clock in terms of the clock face first ride on the operating portion 84 of the operating member.
[0037]
If the cam 4 is rotated 90 ° with a key inserted into the cylinder lock in this state, the passive pins 51 and 51 are disengaged from the operating member 8 as shown in FIG. In this case, the clutch cylinder 5 returns to the non-engagement position with the base of the tail piece 7 shown in FIG.
[0038]
However, in the illustrated embodiment, another passive pin 51 is implanted at an angle of 4:30 in terms of the clock face in FIG. 1, and when the cam 4 is rotated by 90 °, FIG. 7, the passive pin 51 rides on the operating portion 84 of the operating member, so that the operating state is maintained.
[0039]
This extra passive pin 51 is attached according to a specific operating angle of the cam 4, and it is clear that the operating angle of the cam 4 is not necessary for a locking mechanism of 45 °, for example. It is not a component.
[0040]
On the other hand, even if a resident or the like is out, a person who intends to steal or the like breaks the window glass provided near the door itself or near the door and inserts his hand through the hole to rotate the thumb turn. Is locked by the cylinder lock as described above, so that unauthorized unlocking by thumb turn is impossible.
[0041]
In addition, in order for a resident etc. to return from going out and to return this crime prevention apparatus to the normal state which is a non-operation state, the operation member 8 pushed into the rear position in the state which opened the door 10 through the opening part 14 of the front board 11 Pull it out to the front position.
[0042]
At that time, the clutch cylinder 5 returns from the engagement position with the base of the tail piece shown in FIG. 8 to the non-engagement position shown in FIG. 3, so that the clutch cylinder 5 returns to the normal locking / unlocking mechanism.
[0043]
【The invention's effect】
According to the security device in the present locking lock according to the present invention described above, even if the user tries to rotate the thumb turn by breaking the window glass provided in or near the door itself, Since the thumb turn shaft can be locked with a cylinder lock when going out, etc., it is extremely effective in preventing unauthorized unlocking due to the thumb turn.
[0044]
Further, since the operation state of the crime prevention device of the present invention cannot be released unless the door is opened, there is an effect that a high degree of safety can be maintained in terms of crime prevention.
[Brief description of the drawings]
FIG. 1 is a view showing an embodiment of a security device in a lock according to the present invention in a non-operating state, in which (A) is a front view and (B) is a partially longitudinal side view.
2 is a side view of the cam and clutch cylinder assembly removed from the embodiment of FIG. 1 with the biasing means omitted. FIG.
FIG. 3 is a rear cross-sectional view taken along line III-III in FIG.
4A and 4B are views showing an operation member removed from the embodiment of FIG. 1, in which FIG. 4A is a side view and FIG. 4B is a plan view.
FIG. 5 is a perspective view showing a tip portion of a tail piece.
6 is a partially longitudinal side view showing the embodiment of FIG. 1 in an activated state and shown in an unlocked state.
7 is a partially longitudinal side view showing the embodiment of FIG. 1 in an activated state and shown in a locked state.
[8] The horizontal cross-sectional partial rear view simply by the line VIII-VIII of FIG.

Claims (1)

A cam that is pivotally supported by the lock box so that it can be rotated by a thumb turn on the indoor side or a cylinder lock on the outdoor side, so that the dead bolt provided in the lock box attached to the door can be moved in and out of the front plate. In this lock, which is engaged with the dead bolt, a clutch cylinder having a thumb turn shaft inserted into the inner end portion and a tail piece inserted into the outer end portion can be relatively moved only in the axial direction on the cam. The cross-sectional shape of the tail end of the tail piece is the same as that of the thumb turn shaft, and the clutch cylinder is normally urged toward the inoperative position where the outer end engages with the tip of the tail piece. Furthermore, in order to occupy the operating position where the outer end of the clutch cylinder engages with the base end of the tailpiece, an operating member that can move in the horizontal direction is provided in the lock box. One end is a hand In the present locking lock characterized in that it faces the opening provided in the front plate so that it can be operated directly or indirectly, and the other end side on which the inclined cam is formed is linked to the clutch cylinder. Security device.

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