JPH09256711A - Locking device of latch bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking device which is covenient to handle by energizing a cam member with a spring device. SOLUTION: A thumb-turn shaft 19 which is connected to a control cam which controls taking in and out of a latch bolt which serves as a dead bolt and a knob for the operation of the thumb-turn shaft provided in the indoor side are connected to each other coaxially and turnably in a relative manner. Furthermore, a first cam 26 having a notched area 25 in the circumferential direction, which is united with a knob at the outer periphery and a second cam 27, which is projectingly provided with an engagement projection 29 slidably engageable with the aforesaid notched area 25 in the circumferential direction at the tip are coaxially and integrally united with the thumb-turn shaft 19. The first cam 26 united with the knob is energized with a spring device 35 having a consideration position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for a latch bolt (hereinafter, simply referred to as a latch bolt) also serving as a dead bolt, which is used for a lock of an automatic lock used in a hotel guest room or the like, and is particularly easy to operate. The present invention relates to a latch bolt locking device that can keep a latch bolt retracted.

[0002]

2. Description of the Related Art Locks used, for example, in hotel rooms and in doors of research laboratories of companies are used to improve safety.
In many cases, a so-called automatic lock is adopted.

An example of the lock of this automatic locking will be described later. When the latch bolt is inserted into the strike hole of the door frame when the door is closed, the member for fixing the latch bolt at the projecting position automatically operates, It is possible to lock the door without locking the lock with the combination key after closing the door.

However, when the lock of this automatic locking is installed at, for example, a doorway of a laboratory or an entrance / exit of an employee of a financial institution, it is good during the daytime when few people come in and out, but at the time of leaving / entering the office. In the morning and evening when there are many people, it is troublesome to operate the secret code input panel of the key combination and electric lock every time a person goes in and out.

[0005] Therefore, a latch bolt locking device that holds an automatically locked latch bolt temporarily immersed in a lock box and makes it an empty lock has been proposed and put into practical use.

This latch bolt locking device is, for example, as shown in FIG. 1, a locking body 4 which moves integrally with a latch bolt 2 in a lock box 1 in the front-back direction (the thickness direction of the front plate 3). The control rod 5 has a slivers formed on the outer end face of the front plate 3 and a stopper 6 attached to the inner end of the control rod 5.

In the normal state where the latch bolt locking device does not operate, the stopper 6 is in an angular position where it does not interfere with the movement locus of the locking body 4, as shown in FIG. With the latch bolt 2 pulled into the lock box 1 by the inner handle, the control rod 5 is rotated counterclockwise, for example, by 90 degrees with a screwdriver or the like.

Then, as shown in FIG. 2, the stopper 6
Comes to interfere with the movement locus of the locking body 4, and the former blocks the latter from the front side (front side), so that the latch bolt 2 integrated with the locking body 4 remains in the locked state in the lock box 1. Be stopped.

[0009]

Of course, the latch bolt locking device described above has its intended function and is in practical use. However, in order to operate the locking device, the door is once opened to expose the control rod 5. In addition, since I have to search for the driver and bring it to the door, I still have the resentment that the operation is a little troublesome.

Therefore, an object of the present invention is to provide a latch bolt locking device which can be operated with fingers while the door is closed and which is of course easy to operate without using a driver or the like.

[0011]

In order to achieve the above object, the present invention provides a thumb turn shaft connected to a control cam for controlling the taking in and out of a latch bolt which also serves as a dead bolt, and a thumb turn shaft provided on the indoor side. A first cam body that is coaxially and relatively rotatably connected to the operating knob, and has a notch along the circumferential direction on the outer circumference, and an engagement that engages with the notch at the tip end so as to be freely movable in the circumferential direction. One of the second cam bodies provided with the protrusion is coaxially and integrally coupled to the thumb turn shaft and the other to the knob, and the cam body coupled to the knob is biased by a spring device having a thought position. Characterize.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. In FIG. 3, reference numeral 7 is a door,
Reference numerals 8 and 9 represent outer and inner escations, respectively,
The lock box 1 for automatic locking is installed in the door 7 between these outer and inner escutcheons.

The structure of a lock box for automatic locking is well known and is not the gist of the present invention. However, as a precaution, an example of the structure is shown in FIG. 4, which is connected to an inner cylinder of a cylinder lock or a thumb turn shaft. A sector gear 12 is formed on the outer peripheral portion of the control cam 11.

The sector gear 12 is guided so as to be movable in the front-rear direction and meshes with a rack formed on a part of the unlocking board 13 biased in the forward direction.
The unlocking pin 14 planted on the unlocking board 13 is in contact with the inclined portion of the locking lever 15 from the front.

With the above structure, when the thumb turn shaft is rotated counterclockwise in FIG. 4, the unlocking pin 14 moves rearward, so that the locking lever 15 rotates clockwise and the latch bolt 2 is locked. Solve

When the thumb turn shaft is further rotated counterclockwise,
The unlocking board 13 is connected to the latch board 17 via the connecting piece 16.
Is moved rearward, so that the latch bolt 2 mounted on the latch board 17 sinks into the lock box 1.

The lock equipped with the latch bolt locking device of the present invention shown in FIG. 3 is an electric lock to be installed in a guest room of a hotel. In addition to the structure of the lock box shown in FIG. Not attached to the cylinder lock cavity 18 of
The structure is such that the latch bolt can be taken in and out by a cylinder lock that is not coaxial with the thumb turn shaft 19, but since the structure is not the gist of the present invention, further detailed description will be omitted.

The thumb-turn shaft 19 passes through a control cam (11 in FIG. 4) of an automatic locking type lock box (not shown), and the outer end (left end in FIG. 3) is rotatable on the inner surface of the outer escutcheon 8. Is supported by.

On the other hand, the inner end of the thumb turn shaft 19 is coaxially and relatively rotatably connected to a knob 22 rotatably protruding from the inner surface of the inner escutcheon 9 via a coupler 21. .

That is, as shown in FIG. 5, a stepped receiving hole 21a is formed in the outer end surface (left end surface in FIGS. 3 and 5) of the coupler 21 so as to be fitted with the inner end portion of the coupler 21. ,
The inner end portion of the thumb turn shaft 19 that fits into the receiving hole 21a is integrally coupled to the coupler 21 by a pin 23 (see FIG. 3) that penetrates the coupler 21.

Also, as shown in FIG. 5, the inner end surface of the coupler 21 has an oval-shaped mounting step portion 21b and a connecting shaft 21c.
And are arranged coaxially.

On the other hand, as shown in FIG. 5, the retaining ring groove 2 is formed substantially at the center of the small-diameter portion 22a continuously provided on the outer end surface of the knob 22.
2b is formed, and the cross section outside the retaining ring groove 22b (on the left side in FIG. 5) has an arrow-shaped oval shape,
This oval-shaped section has a cam attachment portion 22c.

The connecting shaft 2 is attached to the small-diameter step portion 22a.
A connecting hole 22d that rotatably fits with 1c is provided.

Returning to FIG. 3, the knob 22 having the above structure is shown.
Is rotatably supported by the inner escutcheon 9 with the small-diameter step portion 22a facing outward, and is prevented from coming off by a retaining ring 24.

As shown in FIGS. 3 and 6, the cam mounting portion 22c of the knob is roughly dish-shaped and has a notch formed at an angle of about 90 degrees on the outer periphery, and the cam mounting portion 22c is mounted at the center. Part 2
Oval mounting hole (not shown) with the same shape as the cross section of 2c
The first cam body 26 having the opening is attached.

On the other hand, in the connecting hole of the knob 22 attached to the inner escutcheon 9 as described above, the connecting shaft 21c at the inner end of the coupler 21 to which the thumb turn shaft 19 is connected at the outer end.
(See FIG. 5) is rotatably fitted.

In this way, the thumb turn shaft 9 and the knob 2
2 is coaxially and relatively rotatably connected to each other via a coupler 21.

The mounting step portion 21b of the coupler 21
In the second cam body 27 (see FIG. 5), an oval-shaped mounting hole (not shown) having the same shape as the cross-sectional shape is opened in the center.
However, the washer 28 is inserted between the first cam body 26 and the first cam body 26.

The second cam body 27 in the illustrated embodiment is
As shown in FIG. 6, the whole shape is a teardrop-shaped plate-like member, and the tip end, which is the pointed end thereof, faces the first cam member 26 (see FIG. 3) and is pin-like engaged. The protrusion 29 is provided so as to project.

As shown in FIG. 6, the engaging projection 29 is engaged with the notch 25 of the first cam body so as to be movable at a fixed angle (90 degrees in the illustrated embodiment).

As shown in FIGS. 3 and 6, one end of a spring rod 31 is rotatably coupled to the end of the first cam body 26 opposite to the notch 25, The other end of the spring rod 31 is loosely fitted in a slit 33 of a horizontal support plate 32 attached to the inner escutcheon 9.

Furthermore, a biasing spring 34 as a compression coil spring is wound around the spring rod 31.

In the spring device composed of the spring rod 31, the support plate 32, the biasing spring 34, etc., the angular position at which the spring rod 31 is vertical in FIG. 6 is one where one end can swing to the left or right. A spring device (hereinafter simply referred to as a spring device) 35 having a thought position is configured.

In FIG. 6, reference numeral 36 denotes a stop pin, and this stop pin 36 defines the angular position of the first cam body 26 biased by the spring device 35.

In the latch bolt locking device according to the embodiment of the present invention constructed as described above, in the normal state having the original function of the lock for the automatic locking, as shown in FIG. 6, for example, the first cam is used. It is assumed that the body cutout 25 is in the first quadrant of the XY coordinate axes.

At this time, the engaging projection 29 integral with the thumb-turn shaft 19 is urged by the urging force that constantly urges the thumb-turn shaft 19 (for example, the spring for urging the unlocking board 13 in FIG. 4 forward). It is assumed that the engaging projection 29 is biased in the clockwise direction, is locked to one end edge of the notch 25, and is in the angular position of 3 o'clock in terms of the clock face.

In the normal state of the lock described above and shown in FIG. 6, the spring device 35 includes the spring rod 31 and the first cam body 2.
The angle position of 6 is kept stable, and the thumb turn shaft 19 is elastically locked at the constant angle position.

In this normal state, by operating an external operating member such as a key and / or a knob from the outside of the room or an internal operating member such as a handle and a knob from the inside of the room, a known latch bolt operating mechanism inside the lock box is operated. The latch bolt is driven so as to be pulled into the lock box by the thumb turn shaft 19 and the engaging projection 29 which are integrally connected to the latch bolt at this time.
6 rotates 90 degrees counterclockwise in FIG. 6, so that the engagement protrusion 29 floats in the notch 25 of the first cam body.

In order to operate the latch bolt locking device according to the present invention, the thumb knob 22 on the indoor side of the thumb turn is viewed clockwise from the indoor side, that is, the first cam body 26 in FIG.
Rotate with your fingers to drive counterclockwise.

Then, the knob 2 is resisted against the biasing force applied to the thumb turn shaft 19 and the elastic force of the spring device 35.
The first cam body 26 integral with 2 starts rotating counterclockwise in FIG.

In the initial stage of the rotation, the force of the finger acts in the direction of compressing the biasing spring 34 of the spring device, pushing the other end of the spring rod 31 into the slit 33 of the support plate 32, and The cam body 26 is driven so as to rotate counterclockwise.

When the spring rod 31 has passed the position where it is almost vertical, the elastic force of the biasing spring 34 causes the first cam body 2 to move.
6 rapidly rotates counterclockwise and abuts one stop pin 36, and the notch 25 stops at an angular position aligned with the fourth quadrant of the XY coordinate axes.

At this time, one edge of the cutout 25 is
The engaging projection 29 integrated with the thumb-turn shaft 19 is elastically and permanently locked at the 12 o'clock position in opposition to the urging force of the thumb-turn shaft 19 by converting it into a clock face.

Therefore, the latch bolt connected to the thumb turn shaft 19 also stably keeps the position retracted in the lock box.
In this way, the lock is in an empty state.

To release the latch bolt locking device, the first cam body 26 integrated with the knob 22 may be simply rotated in the opposite direction, that is, clockwise in FIG.

By rotating the knob 22 in the releasing direction, each member constituting the latch bolt locking device operates in the opposite direction to the above and returns to the normal state shown in FIG.

The present invention is not limited to the above-mentioned embodiments, but can be modified in various ways.

For example, as shown in FIG. 8, the spring device 35.
A well-known open leg spring is employed, and one end thereof is rotatably wound around a spring hooking pin of the first cam body 26 and the other end is rotatably wound around a fixed spring hooking pin 37 implanted in the inner escutcheon. .

Then, the opening leg spring 35 is elastically deformed by the rotation of the first cam body 26 so as to narrow the gap between the opening legs, and the entire body rotates about the other end as the rotation center. A thoughtful position occurs.

In the illustrated embodiment, the first cam body 26 is connected to the knob 22 and the second cam body 27 is connected to the thumb turn shaft 19, respectively. However, the first and second cam bodies 26 and 2 are connected.
Since 7 is essentially a coupler with a floating mechanism, these may be combined in the opposite manner.

[0051]

As is apparent from the above description, the latch bolt locking device according to the present invention can be operated and released by fingers without using a tool such as a screwdriver, and with the door closed. Since it can be performed, there is an effect that the usability of the latch bolt locking device can be significantly improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a lock box provided with a conventional latch bolt locking device, showing a normal state in which the latch bolt locking device is not operating.

FIG. 2 is a partially cutaway front view of a lock box provided with a conventional latch bolt locking device, showing a state in which the latch bolt locking device is operating.

FIG. 3 is a sectional view of an essential part of a latch bolt locking device according to an embodiment of the present invention.

FIG. 4 is a partial sectional side view showing an example of a lock box having an automatic locking mechanism.

FIG. 5 is a side view showing a configuration of a coupler and a knob.

6 is a partial cross-sectional view taken along line VI-VI of FIG. 3, showing a normal state in which a latch bolt locking device is not operating.

7 is a partial cross-sectional view taken along the line VII-VII of FIG.
The operation state of the latch bolt locking device is shown.

FIG. 8 is a front view of a latch bolt locking device similar to FIG. 7, showing another embodiment of the present invention.

[Explanation of symbols]

 2 Latch Bolt 11 Control Cam 19 Thumb Turn Shaft 22 Pick 25 Notch 26 First Cam Body 27 Second Cam Body 29 Engagement Protrusion 35 Spring Device

Claims (1)

[Claims] 1. A thumb turn shaft connected to a control cam for controlling the taking in and out of a latch bolt which also serves as a dead bolt, and a thumb turn shaft operating knob provided on the indoor side are coaxially and relatively rotatably connected to each other. , A first cam body having a notch along the circumferential direction on the outer circumference, and a second cam body having an engaging protrusion projectingly engaged with the notch at the tip end so as to be freely movable in the circumferential direction. A latch bolt locking device, wherein the other is coaxially and integrally coupled to the knob, and the cam body coupled to the knob is biased by a spring device having a thought position.