JPH05306587A - Guard arm interlocking mechanism of guard arm lock - Google Patents

Abstract

PURPOSE:To make it possible to constitute a guard arm of a thin plate member in a guard arm lock bearing one end of the guard arm on a strike side of a door frame in a turnable manner and interlocking a free end with the front end of a dead-bolt to give a function of a door chain. CONSTITUTION:A dead bolt 6 forming a groove interlocking with a guard arm 12 on the front end is borne on a slider guided in the direction of front and rear perpendicular to the front plate in a lock box and selectively placed to an unlocking position, locking position and guard arm operating position by a thumb turn in a vertical direction movably. A dead bolt hole 25 longer in a vertical direction is opened in the front plate in order to avoid an intervention with the dead bolt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guard arm locking mechanism (hereinafter simply referred to as a locking mechanism) of a guard arm lock, and in particular, a so-called guard arm is thinned to be dust (the free side edge of the door and the door). The present invention relates to a locking mechanism that can be stored in a space between the frame and the frame.

[0002]

2. Description of the Related Art In recent years, a so-called guard arm lock having the function of a conventional door chain has been proposed and put into practical use.
This guard arm lock is disclosed, for example, in Japanese Examined Patent Publication No. 61-2235, Japanese Utility Model Laid-Open No. 60-61364, or Japanese Utility Model Laid-Open No. 6-6.
As described in Japanese Unexamined Patent Publication No. 0-104556, a groove engaging with a guard arm is formed at the tip of a dead bolt having a modified cross section that projects from the free side edge of the door toward the door frame, and The amount of protrusion can be set in two steps, large and small. On the other hand, one end of the guard arm is swingably supported on the door frame side facing the free side edge of the door when the door is closed, and
At the other end of the guard arm that aligns with the dead bolt when the door is closed, a deformed engagement hole that can fit with the tip of the dead bolt is opened.

When the guard arm device is actuated, a small amount of dead bolt is projected by the operation of the thumb turn inside the room, and the tip of the dead bolt does not go into the bolt insertion hole of the strike opened in the door frame. The groove at the tip of the is engaged with the engaging hole of the guard arm.

When the door is opened in this state, the guard arm tilts with the tip of the dead bolt and the other end of the guard arm engaged with each other, and the opening angle of the door becomes a constant value determined by the length of the guard arm. In that case, the door cannot be opened any more, and thus the guard arm device functions like a door chain.

[0005]

However, in such a guard arm lock, the guard arm follows the movement of the dead bolt so that the door chain allows a certain opening angle of the door by converting the slack into tension. It must be possible structure.

For this reason, in the conventional guard arm lock, for example, in the device disclosed in Japanese Utility Model Laid-Open No. 60-61364, the guard arm is constructed so as to be foldable. In the invention disclosed in Japanese Patent Laid-Open No. 104556, a guard arm is configured to be extendable / contractible like a blade and a sheath.

However, when the guard arm is constructed in this way, the guard arm becomes thick and cannot be housed in dust. Therefore, the door frame side is normally cut away to house the guard arm. However, in this case, not only the processing of the door frame becomes complicated, but also the door frame is cut out, so that the strength of the door frame decreases.

On the other hand, in the invention disclosed in Japanese Patent Publication No. 61-2235, the guard arm is made of a thin plate material, and the other end (free end) of the guard arm oscillated at one end is supported. Part), and the tip of the deadbolt is engaged with this slot, and the tip of the deadbolt slides toward the free end of the guard arm as the opening angle of the door increases. is doing.

However, in this way, when the door is opened, the dead bolt moves horizontally, whereas the guard arm swings about one end supported on the door frame side, and the dead bolt moves. Since the free end of the guard arm moves more than the free end, if the door has a meeting part, the free end of the guard arm interferes with the meeting part and the door cannot be opened. Inconvenience occurs.

The above-mentioned inconvenience of the conventional guard arm lock is caused only once, and the dead bolt forming a part of the guard arm locking mechanism does not move. It is due to the fact that it must be resolved by the side.

It is an object of the present invention to provide a guard arm locking mechanism which is constructed of a thin plate material and can be housed in dust while avoiding the above-mentioned inconvenience.

[0012]

In order to achieve the above object, the invention according to claim 1 is guided in a lock box such that the lock box is movable in the front-rear direction perpendicular to the front plate of the lock box. By the thumb turn, a slider selectively placed in an unlocked position, a locked position and a guard arm actuating position intermediate between these, and a slider which is carried by the slider and engages with a free end of the guard arm are formed. The slider has a dead bolt that is vertically movable, and the front plate is provided with a vertically long dead bolt hole in order to avoid interference with the vertically moving dead bolt. Is characterized by.

The invention according to claim 2 is guided in the lock box so as to be movable in the front-rear direction perpendicular to the front plate of the lock box, and by the thumb turn, the unlocked position, the locked position and the lock position. A slider selectively placed at an intermediate guard arm operating position, and a groove which is carried by the slider and engages with a free end of the guard arm are formed at a front end of the slider, and the slider is vertically movably guided. A dead bolt and a spring member for urging the dead bolt in the vertical direction toward a normal position aligned with the dead bolt insertion hole of the strike of the door frame. The feature is that a long deadbolt hole is opened in the vertical direction to avoid interference with the deadbolt that moves in the direction.

Further, in the invention according to claim 3, in the lock box, the lock box is guided so as to be movable in the front-rear direction perpendicular to the front plate of the lock box. A slider selectively placed in an intermediate guard arm operating position of, and a groove that is carried by the slider and engages with the free end of the guard arm at the front end,
A dead bolt guided vertically in the slider, a T-shaped guide groove fixed in the lock box and extending in a plane parallel to the lock box side, and a side surface of the dead bolt. Is provided with a guide pin that engages with the guide groove, and the guide pin engages with the lateral bar portion of the guide groove when the dead bolt is vertically aligned with the dead bolt insertion hole in the normal position. A guide mechanism that allows the guide pin to engage with the vertical rod portion of the guide groove when the slider is in the guard arm operating position in the front-rear direction, and moves vertically in the front plate. The feature is that a long deadbolt hole is opened vertically to avoid interference with the deadbolt.

Further, in the invention according to claim 4, in the lock box, the lock box is guided so as to be movable in the front-rear direction vertical to the front plate of the lock box, and by the thumb turn, the unlocked position, the locked position, and these lock positions A slider selectively placed at an intermediate guard arm operating position, and a groove which is carried by the slider and engages with a free end of the guard arm are formed at a front end of the slider, and the slider is vertically movably guided. A dead bolt, a T-shaped guide groove that is fixed in the lock box and extends in a plane parallel to the lock box side, and a side surface of the dead bolt that projects and engages with the guide groove. With the guide pin, when the dead bolt is in the normal position vertically aligned with the dead bolt insertion hole, the guide pin engages the lateral bar portion of the guide groove, and the slider operates the guard arm in the front-back direction. Rank , The guide mechanism that allows the guide pin to engage with the vertical bar portion of the guide groove, and the dead bolt in the vertical position are aligned with the dead bolt insertion hole of the strike of the door frame in the normal position. The front plate has a spring member that is biased in the direction toward which it is directed, and a dead bolt hole that is long in the vertical direction is opened in the front plate to avoid interference with the dead bolt that moves in the vertical direction.

[0016]

In the locking mechanism according to the first aspect of the present invention configured as described above, the dead bolt is urged downward by utilizing the acceleration due to gravity, and the dead bolt is moved downward in the vertical direction. Seat in a normal position. That is, the invention described in claim 1 can be applied only when the normal position where the dead bolt is aligned with the dead bolt insertion hole of the door frame is at the lower end of the vertical movement range of the slider.

In this locking mechanism, the dead bolt is retracted into the lock box when the slider is in the unlocked position.

However, when the slider is placed in the guard arm operating position by the thumb turn when the door is closed, the groove at the front end of the dead bolt engages with the deformed hole opened at the free end of the guard arm, but is opened in the door frame. Does not hang on the deadbolt insertion hole.

The deformed hole at the free end of the guard arm is usually a rectangular hole that can be loosely fitted in the dead bolt, and the cross-sectional shape of the groove at the front end of the dead bolt is usually circular, or at least part of a circle. The guard arm can be tilted with the front end of the dead bolt and the guard arm engaged.

Further, when the door is slightly opened and the guard arm is tilted, the rectangular cross section in front of the groove of the dead bolt obliquely intersects with the deformed hole of the guard arm, so that the dead bolt and the guard arm are engaged. Can't be solved.

On the other hand, when the door is opened with the front end of the dead bolt engaged with the free end of the guard arm, the distance between the bearing point of the guard arm and the dead bolt does not change, but the door does not change. As the distance between the frame and the dead bolt increases, the dead bolt slides upward in the slider.

Since the front plate has a vertically long dead bolt hole, the front plate is forward (outward) from the front plate.
Even if the dead bolt protruding to the side slides up, it does not interfere with the front plate. Thus, claim 1
The locking mechanism described in (1) can prevent the guard arm from being gouged by the movement of the dead bolt, thus ensuring the operation of the guard arm device.

When the slider is placed in the locked position after the door is closed, the tip of the dead bolt is inserted into the dead bolt insertion hole of the door frame with the guard arm pierced through, and the state of locking is the same as that of the conventional guard arm lock. The same as in.

The locking mechanism according to the second aspect of the invention is
A spring member urges the dead bolt in the vertical direction toward the normal position. In other words, the dead bolt is elastically pressed to the upper or lower end position of its moving range in the slider.

If the dead bolt is elastically pressed to the lower end position, the operation of the locking mechanism is the same as that of the invention described in claim 1 above, except that the dead bolt is dead as the door is opened. The only point is that when the bolt slides up, the dead bolt slides up against the elasticity of the spring in addition to gravity.

When the dead bolt is elastically pressed to the upper end position of the moving range of the slider, the support point of the guard arm is set downward and the deformed hole engaging with the dead bolt is arranged above. It is possible to ensure the operation of the guard arm device.

The locking mechanism according to the third aspect of the invention is
A guide pin protruding from the side surface of the dead bolt engages with a T-shaped guide groove fixed in the lock box. Even if the lateral bar portion of this guide groove is located above or below, Even (so-called inverted T shape), the dead bolt is movable in the front-rear direction only when it is in the normal position in the vertical direction.
Further, the dead bolt can move up and down only when the slider is in the guard arm operating position in the front-rear direction.

Therefore, even if the dead bolt is not biased toward the normal position by the spring member, the dead bolt is normally seated in the normal position, and when the slider is in the locked position and the unlocked position, Even if the dead bolt cannot be moved up and down with fingers, the dead bolt cannot be moved, and any malfunction caused by the dead bolt being mischievously prevented is effectively prevented.

Furthermore, the normal position of the dead bolt may be the upper end of the moving range of the slider.

The function of the locking mechanism according to the invention of claim 4 is, in addition to the function of the locking mechanism according to the invention of claim 3 described above, the function of the locking mechanism according to the invention of claim 2. Similarly, in the vertical direction, the dead bolt is constantly urged in the direction toward the normal position by the elastic force of the spring member, so that even when the slider is in the guard arm operating position, the dead bolt is applied to the vertical bar portion of the guide groove. Do not fall along.

The other functions are the same as those of the locking mechanism according to the invention described in claim 3, and therefore a more detailed description will be omitted.

[0032]

Embodiments of the present invention will be described below with reference to the drawings. For convenience of explanation, the invention described in claim 4 will be described. The invention described in claims 1 to 3 may be considered by omitting the spring member, the guide mechanism, or both from the invention described in claim 4.

In FIG. 1, reference numeral 1 indicates a lock box, and the lock box 1 is embedded in the free side edge of the door. In the lock box 1, a slider indicated by reference numeral 2 is guided so as to be movable in the front-rear direction (the left-right direction in FIG. 1) perpendicular to the front plate 3 of the lock box 1.

The slider 2 in the illustrated embodiment has a first
The second slider plates 4 and 5 are integrally connected to each other through a gap for holding the dead bolt 6 to form a frame body having a substantially T-shaped lateral shape.

The slider 2 in the illustrated embodiment is held in the lock box by sliding the outer surface of a rectangular frame having a flat cross section to the inner surface of the lock box 1, and moves in the front-rear direction. It is possible to be guided.

Further, the slider 2 is engaged with the dead cam 7 and the auxiliary dead cam 8 connected to the thumb turn on the indoor side, and is unlocked as shown in FIG. 1, the guard arm operating position as shown in FIG. 3, and as shown in FIG. It is configured to be selectively placed in the locking position shown.

That is, in the slider 2 of FIG. 1, a substantially rectangular driven notch 11 continuous with the stop edge 9 is formed at the upper end edge of the inner end portion of the front side first slider plate 4. And turn the thumb turn to move the dead cam 7 clockwise 90 in FIG.
By rotating the dead cam 7, the dead cam 7 engages with the follower cutout 11 to project the slider 2 to the left (forward), and the tip of the dead bolt 6 carried by the dead cam 7 is moved to the door frame as shown in FIG. The guard arm 12, which will be described later, mounted on the side is pierced and inserted into the dead bolt insertion hole 14 opened in the strike 13 to lock the door. At the same time, the tip of the dead cam 7 rides on the above-mentioned butt 9 of the first strike plate 4.

On the other hand, when operating the guard arm device, as shown in FIG. 3, the thumb turn is turned from the inside of the door to rotate the auxiliary dead cam 8 having a shape forming a part of the loop of the snake clockwise by 45 degrees. Let

Then, the tip of the auxiliary dead cam 8 pushes the operating edge 15 formed on the second slider plate 5 of the slider forward, and the front end of the dead bolt 6 is opened to the lower end (free end) of the guard arm 12. It is put into the engaged hole 16 (see FIG. 4).

The unlocked position (FIG. 1), the guard arm operating position (FIG. 3) and the locked position (FIG. 2) of the dead cam 7 and the slider 2 described above are respectively held metastable by a known click device 17. With click device 17
The operation of the thumb gives a crisp click feeling to the human hand operating the thumb turn.

Incidentally, it is manually operated through the thumb turn,
The slider drive mechanism for selectively placing the slider 2 in the unlocking position, the guard arm operating position and the locking position is not limited to the one shown in the drawings, but is a known dead type of various guard arm locks that have been proposed or already used. A bolt drive mechanism can be adopted.

On the other hand, a dead bolt 6 is movably carried between the first and second slider plates 4 and 5 constituting the slider 2 in the vertical direction.

The dead bolt 6 in the illustrated embodiment is
As shown in FIG. 2, FIG. 3 and FIG. 5, it is a rectangular block body having a flat cross section, and the front end (left end in FIG. 2 and FIG. 3) of the block body is opened at the free end of the guard arm 12. A groove 18 that engages with the engagement hole 16 (see FIG. 4) is formed.

As shown in FIG. 5, the cross-sectional shape of this groove portion is, for example, an oval shape or a circular shape, and when the groove 18 and the engagement hole 16 of the guard arm are engaged, the guard arm is formed. 12 can be tilted.

Further, as shown in FIG. 3, a guide rod 19 is vertically provided between the first and second slider plates 4 and 5 so as to penetrate the dead bolt 6 in the vertical direction. In addition, as shown in FIG. 2, a guide pin 21 protruding from the side surface of the dead bolt 6 is slidably engaged with a vertically long guide hole 22 opened in the first slider plate 4.

With the above structure, the dead bolt 6 is guided by the slider 2 so as to be movable in the vertical direction.

A dead spring 23 as a compression coil spring is provided at a portion of the guide rod 19 above the dead bolt 6.
Is wrapped around. The dead bolt 6 is in the normal position (the slider 2 shown in FIGS. 1 to 3) aligned with the dead bolt insertion hole 14 (see FIGS. 2 and 4) of the strike 13 in the vertical direction by the elasticity of the dead spring 23. (The lowest end position in the).

On the other hand, the tip end portion of the guide pin 21 projecting from the side surface of the dead bolt 6 projects outside the slider 2 so as to penetrate the first slide plate 4 from the inside, and the lock box 1 shown in FIGS. It is slidably engaged with an inverted T-shaped guide groove 24 that is opened in the other side plate (a side plate that is in sliding contact with the first slider plate 4) not shown in FIG.

The vertical position of the lateral bar portion of the guide groove 24 is set so that it can be engaged with the guide pin 21 when the dead bolt 6 is in the normal position as shown in FIGS. There is.

As shown in FIG. 3, the position of the vertical bar portion of the guide groove 24 in the front-rear direction is aligned with the guide pin 21 when the slider 2 is placed in the guard arm operating position. It is set.

The front plate 3 of the lock box 1 has a structure shown in FIG.
As shown in, a dead bolt hole 25 that is long in the vertical direction is opened.

Further, in FIGS. 1 to 3 and 5, reference numerals 26 and 27 denote first and second shutters, respectively, and these first and second shutters 26 and 27 are not shown in the side edges. It is a plate-like member having a protruding piece, and is guided so as to be movable in the vertical direction by slidably engaging this ear piece with an elongated shutter guide groove (not shown) opened in the side plate of the lock box 1. Be present.

These shutters 26 and 27 are urged downward by the acceleration of gravity, and when the dead bolt is in the normal position, they are lowered to the lowermost position as shown in the figure,
Although it operates so as to close the portion of the dead bolt hole 25 above the dead bolt 6, it is not an essential constituent element of the present invention.

The locking mechanism according to the embodiment of the present invention constructed as described above is used when the guard arm device is not operated, that is, when the slider 2 is in the unlocked position (see FIG. 1).
Further, when in the locked position (see FIG. 2), the dead bolt 6 and the slider 2 are integrally coupled in the front-rear direction, so that they operate in the same manner as a normal lock mechanism of a lock.

Since the locking mechanism according to the first and second aspects of the present invention does not have the T-shaped guide groove, the dead bolt can be moved upward when the slider 2 is in the unlocked position. However, when unlocking, it has no adverse effect on the lock.

The slider 2 is moved to the guard arm operating position (see FIG. 3).
(See), the groove 18 at the front end portion of the dead bolt 6 engages with the engagement hole 16 opened at the free end portion of the guard arm as described above.

When the door is opened in this state, as shown in FIG. 6, the dead bolt 6 slides up in the dead bolt hole 25 to prevent the dead bolt 6 and the guard arm 12 from being gouged.

[0058]

As is apparent from the above description, according to the present invention, the dead bolt is carried on the slider, and the dead bolt can be moved in the vertical direction relative to the slider when the guard arm is operated. It is possible to absorb the gouging between the dead bolt and the guard arm in the form of vertical movement of the guard arm. Therefore, it is not necessary to provide the guard arm with a mechanism to absorb the gouging. Can be composed of

The fact that the guard arm can be made of a thin plate material allows the guard arm to be housed in the dust without making a large cutout in the door frame, and simplifies the processing of the door frame of the door opening. In other words, various effects such as the strength of the door frame can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a guard arm lock provided with a locking mechanism according to an embodiment of the present invention, showing a state where a slider is in an unlocked position.

FIG. 2 is a sectional view of a guard arm lock provided with a locking mechanism according to an embodiment of the present invention, showing a state where a slider is in a locking position.

FIG. 3 is a sectional view of a guard arm lock provided with a locking mechanism according to an embodiment of the present invention, showing a state where the slider is in a guard arm operating position.

FIG. 4 is a front view of a strike equipped with a guard arm.

FIG. 5 is a front view of the front plate of the lock box.

FIG. 6 is a front view of a strike showing an operating state of the guard arm device, and a front plate of the lock box is indicated by a chain line.

[Explanation of symbols]

 1 Lock Box 2 Slider 3 Front Plate 6 Dead Bolt 7 Dead Cam 8 Auxiliary Dead Cam 12 Guard Arm 13 Strike 14 Dead Bolt Insertion Hole 16 Engagement Hole 18 Groove 19 Guide Rod 23 Dead Spring 24 Guide Groove 25 Dead Bolt Hole

Claims (4)

[Claims] 1. A lock box is guided so as to be movable in the front-rear direction perpendicular to the front plate of the lock box, and is selectively moved to an unlocking position, a locking position and a guard arm actuating position intermediate therebetween by a thumb turn. And a dead bolt carried by the slider and having a groove formed at the front end to engage with the free end of the guard arm and guided in the slider so as to be vertically movable. A guard arm locking mechanism for a guard arm lock, characterized in that a long dead bolt hole is opened in the vertical direction to avoid interference with the dead bolt that moves in the vertical direction. 2. Inside the lock box, the lock box is guided so as to be movable in the front-rear direction perpendicular to the front plate of the lock box, and is selectively moved to an unlocked position, a locked position and a guard arm actuating position intermediate between these by a thumb turn. And a deadbolt carried by the slider and having a groove for engaging with the free end of the guard arm formed at the front end thereof and guided in the slider so as to be vertically movable, and the deadbolt. In the vertical direction, it has a spring member that biases in the direction toward the normal position aligned with the dead bolt insertion hole of the strike of the door frame, and the front plate interferes with the dead bolt that moves in the vertical direction. The guard arm locking mechanism of the guard arm lock is characterized by opening a long dead bolt hole vertically to avoid 3. In the lock box, the lock box is guided so as to be movable in the front-rear direction perpendicular to the front plate of the lock box, and is selectively moved to an unlocked position, a locked position and a guard arm actuating position intermediate therebetween by a thumb turn. And a dead bolt that is carried by the slider and that has a groove at its front end that engages with the free end of the guard arm, and that is guided vertically in the slider so that it can move in the lock box. Fixed,
Equipped with a T-shaped guide groove extending in a plane parallel to the lock box side and a guide pin protruding from the side surface of the dead bolt and engaging with this guide groove, the dead bolt is vertically movable. The guide pin engages the horizontal bar portion of the guide groove when it is in the normal position aligned with the deadbolt insertion hole, and when the slider is in the guard arm operating position in the front-rear direction, the guide pin is the vertical bar of the guide groove. A guard having a guide mechanism adapted to be engaged with a part, and a front plate is provided with a vertically long dead bolt hole to avoid interference with a vertically moving dead bolt. Guard arm locking mechanism for arm locks. 4. The lock box is guided so as to be movable in the front-rear direction perpendicular to the front plate of the lock box, and is selectively moved by a thumb turn to an unlocked position, a locked position and a guard arm operating position intermediate between these positions. And a dead bolt that is carried by the slider and that has a groove at its front end that engages with the free end of the guard arm, and that is guided vertically in the slider so that it can move in the lock box. Fixed,
Equipped with a T-shaped guide groove extending in a plane parallel to the lock box side and a guide pin protruding from the side surface of the dead bolt and engaging with this guide groove, the dead bolt is vertically movable. The guide pin engages the horizontal bar portion of the guide groove when it is in the normal position aligned with the deadbolt insertion hole, and when the slider is in the guard arm operating position in the front-rear direction, the guide pin is the vertical bar of the guide groove. And a spring member for urging the dead bolt in the vertical direction toward a normal position aligned with the dead bolt insertion hole of the strike of the door frame. , A guard arm locking mechanism for a guard arm lock, characterized in that a dead bolt hole that is long in the vertical direction is opened in the front plate to avoid interference with the dead bolt that moves in the vertical direction.