JP2580076Y2 - Guard arm device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guard arm device, and more particularly to a guard having a so-called guard arm which is thinned and can be housed in dust (a gap between a free side edge of a door and a door frame). Related to an arm device.

[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 JP-B-61-8235, JP-A-60-61364, or JP-A-62-16364.
As described in Japanese Patent Application Laid-Open No. 0-104556, a groove for engaging with a guard arm is formed at the tip of a dead bolt having a modified cross section that protrudes from the free side edge of the door toward the door frame, and the dead bolt is formed. The projecting amount can be set in two stages, large and small. On the other hand, one end of a guard arm is swingably supported on the door frame side facing the free side edge of the door when the door is closed.
At the other end of the guard arm that is aligned with the dead bolt when the door is closed, an odd-shaped engagement hole that can be fitted to the tip of the dead bolt is opened.

When the guard arm device is operated, the dead bolt is protruded by a small amount by operating the thumb turn on the indoor side, and the tip of the dead bolt does not catch on the bolt input hole of the strike opened in the door frame. The groove at the tip of the bolt is engaged with the engagement hole of the guard arm.

When the door is opened in this state, the guard arm tilts in a state where the tip of the dead bolt is engaged with the other end of the guard arm, and the opening angle of the door becomes a constant value determined by the length of the guard arm. No further opening of the door is possible, and in this way the guard arm device functions like a door chain.

[0005]

However, the guard arm lock follows the movement of the dead bolt so that the door chain converts the slack into tension to allow a certain opening angle of the door. The structure must be able to do so.

For this reason, a conventional guard arm lock is constructed such that the guard arm is foldable in the invention described in, for example, Japanese Utility Model Application Laid-Open No. 60-61364. In the device described in JP-A-104556, the guard arm is configured to be extendable and contractable like a blade and a sheath.

However, when the guard arm is configured in this manner, the guard arm becomes thick and cannot be stored in dust. Therefore, the guard arm is usually cut away on the door frame side to store the guard arm. However, in this case, not only the processing of the door frame is complicated, but also the strength of the door frame is reduced due to the cutout of the door frame.

On the other hand, in the invention described in Japanese Patent Publication No. 61-8235, the guard arm is formed of a thin plate, and the other end (free end) of the guard arm having one end swingably supported. Part), a long hole is opened, the tip of the dead bolt is engaged with this long hole, and the tip of the dead bolt slides toward the free end of the guard arm as the opening angle of the door increases. doing.

However, when the door is opened, the dead bolt moves horizontally when the door is opened, whereas the guard arm swings about one end supported on the door frame side. When the door has a mating part, the free end of the guard arm interferes with the mating part, and the door cannot be opened because the moving amount of the free end of the guard arm is larger than the moving amount of the guard arm. , Occurs.

The above-mentioned disadvantage of the conventional guard arm lock is partly because the dead bolt forming a part of the guard arm device does not move, so that the guard arm gouge caused by the rotation of the door is eliminated on the guard arm side. Due to what must be done.

An object of the present invention is to provide a guard arm device which does not cause the above-mentioned inconvenience while the guard arm is made of a thin plate material and can be stored in dust.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, a device according to a first aspect of the present invention has a guard in which a door frame is pivotally supported at one end and an odd-shaped receiving hole is opened at the other end. An arm, a slider which 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 which is selectively placed in one of an operation position and a non-operation position by a thumb turn; carried on, to form a small diameter portion for receiving hole engaging guard arm to the front end, and a engagement shaft that is movably guided in the vertical direction at the slider, the front plate, vertical A vertically long engaging shaft hole is opened to avoid interference with the engaging shaft moving in the vertical direction.

According to a second aspect of the present invention, there is provided a guard arm having one end swingably supported by a door frame and an odd-shaped receiving hole opened at the other end, and a lock box inside the lock box. front plate movably guided perpendicular longitudinal direction, the thumb-turn, a slider which is selectively placed in one of the operating position and the inoperative position, is supported on the slider receiving hole of the guard arm at a front end portion to form a small diameter portion which engages with the engagement shaft that is movably guided in the vertical direction at the slider, the engagement shaft, in the vertical direction, the guard arm of the door frame side receiving hole A spring member that urges in a direction toward a normal position that is aligned with the front plate, and a vertically long engagement shaft hole is opened in the front plate to avoid interference with the engagement shaft that moves in the vertical direction. It is characterized by the following.

[0014]

In the guard arm device according to the first aspect of the present invention, the engagement shaft is urged downward by utilizing the acceleration due to gravity, and the engagement shaft is moved downward in the vertical direction. To a normal position. That is, the invention of claim 1 is applicable only when the normal position where the engagement shaft is aligned with the receiving hole of the guard arm is at the lower end of the vertical movement range of the slider.

In this guard arm device, when the slider is at the inoperative position, the engagement shaft is retracted into the lock box.

When the slider is moved to the guard arm device operating position by the thumb turn when the door is closed, the small diameter portion at the front end of the engagement shaft engages with the irregularly shaped receiving hole opened at the free end of the guard arm.

Usually, the irregularly shaped receiving hole at the free end of the guard arm is a rectangular hole that can be loosely fitted to the engaging shaft, and the cross section of the small diameter portion at the front end of the engaging shaft is usually circular, at least one circular. The guard arm can be tilted while the front end of the engagement shaft and the guard arm are engaged.

[0018] Also, when the door tilts guard arms open, because the front of the rectangular shape portion than the small diameter portion of the engagement shaft is a receiving hole and obliquely intersect rectangular guard arm, the engaging shaft and the guard arm Cannot be disengaged.

On the other hand, when the door is opened with the front end of the engagement shaft engaged with the free end of the guard arm, the distance between the support point of the guard arm and the engagement shaft does not change. Since the distance between the door frame and the engagement shaft increases, the engagement shaft slides upward on the slider.

Since the front plate has a vertically long engaging shaft hole, even if the engaging shaft protruding forward (outward) from the front plate slides up, it does not interfere with the front plate. Absent. Thus, the guard arm device according to the first aspect can prevent the guard arm from digging due to the movement of the engagement shaft, and secures the function as the guard arm device.

It is needless to say that the guard arm device is released by placing the slider in the inoperative position after the door is closed.

In the guard arm device according to the second aspect of the present invention, the spring member urges the engagement shaft in the vertical direction toward the normal position. In other words, the engagement shaft is resiliently pressed to the upper or lower end of its movement range on the slider.

If the engagement shaft is pressed to the lower end position, the operation of the guard arm device is the same as that according to the first aspect of the present invention, and the difference is as the door opens. The only point at which the engagement shaft slides up against the elasticity of the spring in addition to gravity when it slides up.

When the engaging shaft is pressed to the upper end position of the moving range of the slider, if the support point of the guard arm is located below and the receiving hole engaging with the engaging shaft is located above, The operation of the guard arm device described above can be ensured.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Note that, for convenience of explanation, the invention described in claim 2 will be described. The device according to the first aspect may be considered by omitting the spring member from the device according to the second aspect.

In FIGS. 1 and 2, reference numeral 1 denotes a strike plate mounted on a door frame. The upper end of the strike plate 1 is rotatably supported at the upper end of a thin plate-like guard arm 2. I have.

At the center of the strike plate 1 and the guard arm 2 which overlaps the strike plate 1, first and second dead bolt insertion holes 1a into which dead bolts 3 to be described later are inserted when locking.
And 2a are open.

At the lower ends of the strike plate 1 and the guard arm 2, an engagement shaft 4 which will be described later when the guard arm device is operated.
Are inserted into the escape hole 1b and the receiving hole 2b.

The receiving hole 2b in the illustrated embodiment is
A vertically elongated rectangular hole (see FIG. 3) of the engagement shaft 4 has a vertically elongated hole so that it can be loosely fitted and inserted. Although the engaging shaft 4 in the illustrated embodiment has a shape in which a vertically long rectangular flange is integrally connected to the tip of a shaft portion having a circular cross section, in principle, it is shown in FIG. when the guard arm device actuation indicated by the chain line, only the portion to be engaged with receiving hole 2b of the guard arm is not more of it is sufficient that the groove as a circular cross section of the small diameter portion, the whole shank section except the tip It need not be a circular axis.

The strike plate 1 in the embodiment shown in FIG.
The right side edge in FIG. 1 is bent toward the free side edge side (the front side in FIG. 1) of the door to serve as a stopper for the guard arm 2, and FIGS. As shown in FIG. 2, the lower end of the left side edge, including the portion where the wide escape hole 1b is opened, is bent in the opposite direction to the right side edge. 2, the guard arm can be tilted while the engagement shaft 4 is engaged with the escape hole 1b, but this is not an essential component of the present invention.

On the other hand, in FIG. 2, reference numeral 5 denotes a lock box buried at the free side edge of the door. Inside the lock box 5, a front-rear direction perpendicular to the front plate 6 (see FIG. (In the left-right direction).

The slider 7 in the illustrated embodiment is a member obtained by bending a plate material having an inverted L-shape as a whole, as can be clearly seen from FIG. 2 and the left end in FIG. 3) are bent into a U-shape in cross section to form a guide groove of a slide shoe 8 described later.
Further, the upper end edge and the rear end edge of the slider 7 are bent into an L-shaped cross section to increase the overall rigidity.

The slider 7 configured as described above is used in FIG.
As shown in FIG. 6, guide pins 9, 9 (FIG. 4) implanted on the outer surfaces of both ends of the lock box 5 with the front end bent in a U-shape being sandwiched between both side plates of the lock box 5. Lock box 5)
Guide holes 11, 11 formed in the side plate
(See FIG. 2) so as to be slidably engaged with each other, thereby being guided in the lock box 5 so as to be movable in the front-rear direction perpendicular to the front plate 6.

A slide shoe 8 having an L-shaped cross section is slidably guided in a guide groove having a U-shaped cross section formed at the front end of the slider 7.

As shown in FIGS. 5 and 6, a vertically long guide hole 12 is provided in the bottom surface of the guide groove having the U-shaped cross section of the slider 7, and the guide hole 12 is formed in the guide hole 12. minimum <br/> diameter the rear end of the engagement shaft 4 with stages slidably engaged with (right end in FIG. 2) is coupled together by caulking to the sliding Doshu 8.

[0036] With the above configuration, the slide shoe 8, which is integrally connected to the engagement shaft 4 and which, so as to sandwich the guide groove bottom surface of the slider 7 by the small-diameter portion and the slide shoe 8 of the engagement shaft 4 In addition to being coupled to the slider 7, the shape engagement between the slide shoe 8 and the guide groove of the slider prevents rotation about the axis of the engagement shaft 4, and is guided movably up and down along the guide groove. Will be.

At the lower end of the guide groove of the slider 7, a spring hooking pin 13 is swaged as shown in FIGS. 2 and 6, and between the spring hooking pin 13 and the bent piece of the slide shoe 8. The slide shoe 8 and the engaging shaft 4 integral with the slide shoe 8 are urged downward by the elastic force of the slide shoe spring 14 as a tension coil spring elastically provided in the normal state in which no other external force is applied to the engaging shaft. In this case, the engaging shaft 4 is pressed to the lower end position where it is aligned with the receiving hole 2b of the guard arm.

As shown in FIG. 4, a U-shaped first driven notch 15 and a first stop edge 16
Are connected to each other.

The slider 7 configured as described above is connected to the thumb turn on the indoor side, and the first driven notch 15
And driven by an auxiliary dead cam 17 engaged with the first stop edge 16.

The auxiliary dead cam 17 in the illustrated embodiment
Is a hook-shaped member having an outer peripheral edge which forms a part of an arc as shown in FIG. 2, and a dead cam for driving the dead bolt 3 in the thickness direction of the lock box 5 (the direction of the paper surface of FIG. 2). 18 and are integrally connected.

On the other hand, although not a member directly related to the present invention, as shown in FIG. 2, a deadbolt 3 is disposed above the space in the lock box. This deadbolt 3
Is the same as a normal lock dead bolt.
The dead cam 18 is movably guided in the front-rear direction perpendicular to the dead box 18 and has the same elevation as the dead cam 18 in the thickness direction of the lock box. A second driven notch 19 and a second stop edge 21 are continuously provided.

The dead bolt 3 in the embodiment shown in FIG.
The anti-shake lever 22, which has a V-shaped overall shape and is urged in a counterclockwise direction, is provided on a side surface of the dead bolt 3. From the front.

As shown in FIG. 3, the front plate 6 has an engagement shaft hole 24 which is long in the vertical direction so as not to interfere with the engagement shaft 4 which moves upward.

Since the lock provided with the guard arm device according to one embodiment of the present invention is constructed as described above, when the guard arm device shown in FIG. 2 is not operated and the lock is in the unlocked state, the slider is used. 7 and the dead bolt 3 are located at positions shown by solid lines in the figure. At this time, the front ends of the dead bolt 3 and the engagement shaft 4 are flush with the front plate 6, so that the door can be freely opened and closed.

When the auxiliary dead cam 17 and the integral dead cam 18 are rotated, for example, 45 degrees in the counterclockwise direction in FIG. 2 by operating the thumb turn on the indoor side, as shown in FIG. The leading end engages with the first driven notch 15 of the slider to protrude the slider 7 forward and ride on the first stop edge 16. Therefore,
The slider 7 is stopped by the auxiliary dead cam 17 to stably maintain a forwardly projecting position, that is, an operating position.

The guard arm device operating angle position of the auxiliary dead cam 17 shown in FIG. 7 and the locking angle position of the dead cam 18 shown in FIG. The actuation of the click device 25 gives a crisp click feeling to a person who operates the thumb turn.

Also, the slider 7 is moved through the thumb turn in FIG.
The slider driving mechanism selectively placed in the operating position shown in FIG. 2 and the inoperative position shown in FIG. 2 is not limited to the combination of the auxiliary dead cam 17 and the first driven notch shown in the slider, but is conventionally proposed or already used. Various lock deadbolt drive mechanisms that have been used can be employed.

[0048] When the slider 7 as shown in FIG. 7 protrudes to the operative position, projects into a position where the engagement shaft 4 is integrally therewith shown in chain lines in Figure 2, a small diameter portion of the distal end portion of the engagement shaft 4 (shown In this embodiment, the right side of the rectangular flange portion) engages with the rectangular receiving hole 2b (see FIG. 1) opened at the lower end of the guard arm 2.

When the door is opened in this state, as shown in FIGS. 7 and 8, with the small diameter portion of the engagement shaft 4 engaged with the receiving hole 2b of the guard arm 2, the guard arm 2 is moved to FIG. Tilting clockwise to allow the door to open,
Slides up in the engagement shaft hole 24 to prevent the guard arm 2 and the engagement shaft 4 from digging.

When the engagement shaft 4 reaches the uppermost position of the engagement shaft hole 24 as shown in FIG. 8, the door can no longer be opened.

At the maximum opening angle position of this door, of course,
When the door is opened even by one dimension, the tip of the modified engagement shaft 4 is inclined relatively to the receiving hole 2b of the modified guard arm, so that the engagement between the engagement shaft 4 and the guard arm 2 is released. This is the same as the conventional guard arm device.

When locking the lock, the thumb turn is operated after the door is closed, and the dead cam 18 and the auxiliary dead cam 17 integrated therewith are further moved from the angular position shown in FIG.
Turn counterclockwise.

[0053] Then, the distal end portion of Deddokamu 18, protrudes forward dead bolt 3 from the front plate 6 engaged with the second driven cutout 19 of the dead bolt 3, as shown in FIG. 9, the dead The front end of bolt 3 is guard arm 2
Is inserted into the first dead bolt input hole 1a of the strike plate 1 through the second dead bolt input hole 2a (see FIG. 8), and the door is locked to the door frame.

At the same time, the tip of the dead cam 18 rides on the second stop edge 21 of the dead bolt 3, and the dead bolt 3
Is stopped by the dead cam 18 and cannot be retracted into the lock box.

In the illustrated embodiment, the anti-shake lever 22 presses the dead bolt 3 against the tip of the dead cam 18 via the pin 23, so that the dead bolt 3 does not rattle.

In the locked state of the lock shown in FIG. 9, when the auxiliary dead cam 17 and the integral dead cam 18 are rotated clockwise by 45 degrees by operating the thumb turn, the dead bolt 3 stopped by the dead cam 18 is rotated. Is retracted into the lock box by the elasticity of the anti-shake lever 22, and returns to the state of FIG.

When the auxiliary dead cam 17 is further rotated clockwise by 45 degrees by operating the thumb turn, the auxiliary dead cam 17 engages with the rear edge of the first driven notch 15 (see FIG. 4) and 7 is returned to the inoperative position shown in FIG.

[0058]

As is apparent from the above description, in the present invention, the slider carries the engaging shaft for engaging with the guard arm, and the engaging shaft is vertically moved relative to the slider when the guard arm device is operated. Direction, the gouge between the engaging shaft and the guard arm can be absorbed in the form of vertical movement of the engaging shaft. Therefore, the guard arm has no mechanism for absorbing the gore. Therefore, the guard arm can be made of a simple thin plate.

The fact that the guard arm can be made of a thin plate material allows the guard arm to be housed in the dust even if the door frame is not largely notched, and simplifies the processing of the door frame of the door opening. In addition, various effects such as the strength of the door frame can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a strike plate and a guard arm mounted on a door frame side.

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

FIG. 3 is a front view of a front plate of the lock box.

FIG. 4 is a side view of the slider.

FIG. 5 is a partial cross-sectional view taken along line VV of FIG. 2;

FIG. 6 is a partial cross-sectional view taken along line VI-VI of FIG. 2;

FIG. 7 is a sectional view of a guard arm lock provided with a guard arm device according to an embodiment of the present invention, showing a state where the slider is in a guard arm operating position and the guard arm device is operating.

FIG. 8 is a front view of a strike showing an operating state of the guard arm device, and shows a front plate of the lock box by a chain line.

FIG. 9 is a sectional view of a guard arm lock provided with a guard arm device according to an embodiment of the present invention, showing a locked state of the lock;

[Explanation of symbols]

 Reference Signs List 1 strike plate 2 guard arm 2b receiving hole 4 engaging shaft 5 lock box 6 front plate 7 slider 14 slide shoe spring 15 first driven cutout 17 auxiliary dead cam 24 engaging shaft hole

Claims (2)

(57) [Scope of request for utility model registration] 1. A lock arm having one end swingably supported by a door frame and having a modified receiving hole opened at the other end, and a lock arm within the lock box, which is provided in a front-rear direction perpendicular to a front plate of the lock box. It is movably guided, by thumb turn, and a slider which is selectively placed in one of the operating position and the inoperative position, is supported on the slider, to form the small diameter portion for receiving hole engaging guard arm at a front end portion And an engagement shaft guided vertically movably in the slider, and an engagement shaft hole formed in the front plate to be long in the vertical direction in order to avoid interference with the engagement shaft moving in the vertical direction. A guard arm device characterized by having an opening. 2. A guard arm having one end swingably supported by a door frame and having a modified receiving hole opened at the other end, and a front and rear direction perpendicular to a front plate of the lock box in the lock box. It is movably guided, by thumb turn, and a slider which is selectively placed in one of the operating position and the inoperative position, is supported on the slider, to form the small diameter portion for receiving hole engaging guard arm at a front end portion At the same time, an engagement shaft guided vertically movably on the slider, and the engagement shaft is moved in the vertical direction toward a normal position aligned with the receiving hole of the guard arm on the door frame side. A guard arm device comprising: a spring member for urging; and a front plate having a vertically long engaging shaft hole formed in the front plate to avoid interference with the engaging shaft moving in the vertical direction.