JP3205761B2 - Guard arm lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel guard arm lock capable of restricting the opening angle of a door so that a visitor can be confirmed or mail can be delivered.

[0002]

2. Description of the Related Art A guard arm lock of the type in which one or a plurality of arms have a base end pivotally connected to a door frame and a front end side thereof can be selectively engaged with a deadbolt of a door side lock is known. It is more well known and is under active development recently.

However, in the conventional guard arm lock of this type, the guard arm is housed in the gap (dust) between the free side edge of the door and the door frame. Chile dimensions must always be considered for mounting, and the pivoting of the guard arm proximal end is made on the horizontal axis (horizontal axis), and the distal side is horizontal (horizontal direction)
Since the dead bolt that projects into
As the guard arm opens when the door is opened, the torsion action is exhibited on the guard arm, and the torsion action is exhibited between the guard arm and the horizontal pivot, and between the guard arm and the dead bolt, causing problems such as wear and failure. There is a problem that it is easy and that a digging portion for attaching the lock box and the strike to the door and the door frame must be prepared, so that the attaching work is troublesome.

[0004]

SUMMARY OF THE INVENTION The guard arm lock of the present invention solves all of the above-mentioned problems so that it is not affected by the size of the dust in mounting, and the operation of the guard arm is free from twisting or gouging. The purpose of the present invention is to provide a smooth and easy attachment of the lock box and the strike to the door and the door frame.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a method of forming an outer door on an inner free side edge.
Open the notch on the free edge of the door on the side of the lock box
The part of the lock box that is formed and faces up and down with this notch
One of which can be moved up and down along its length
In addition to the unlocked position in the stored state, the guard arm operating position in the semi-projected state into the cutout, and the locked position in the maximum projected state, through the linkage mechanism, by operating the thumb turn on the indoor side. Providing a deadbolt driven by
On the other hand, the strike being fixed to the door frame, collision horizontally
With a protruding piece that has an opening for locking
A guard arm assembly consisting of a front arm and a connecting arm linked in a foldable manner is connected vertically.
And turn the base end of the connecting arm in a strike through the mounting piece.
Movably pivoted and the free end via a vertical pivot
Connects to the proximal end of the forearm and also the free end of the forearm
Has an opening for engaging the guard arm, while
Due to the elasticity of the spring applied to both ends of the arm, the guard arm
The assembly is folded, and the connecting arm is turned indoors.
Energize in the direction of movement, assemble projecting pieces and guard arms
Close the body and deadbolt specifications and mutual
Door protruding piece and free end of front arm loosely fit into cutout of lock box
Engagement holes for locking, locking holes for guard arm operation
And dead bolts are aligned in the horizontal projection plane.
And the deadbolt is in the guard arm operating position
When its tip engages only the forearm, dead bolt
Is in the locked position, the front arm guard arm is activated
Through the locking hole of the projection to engage with the locking hole of the projection.
Is set .

[0006]

[Function] In normal times when the door is freely opened and closed, the length is within the lock box.
Deadbolt that is displaced guided longitudinally (lead straight direction) is the direction, as shown in FIGS. 3-6, in unlocked position of the stored state. Therefore, when the door is closed, not only the tip of the dead bolt but also the locking engagement hole on the strike projection located in the notch of the lock box and the guard arm operation engagement hole of the front arm in the guard arm assembly. Not matched.

Therefore, the thumb turn on the indoor side is for example 45
When the dead bolt is protruded to the guard arm operating position in a half-projected state via the linkage mechanism, the dead bolt is inserted into the guard arm operating engagement hole of the front arm in the guard arm assembly, as shown in FIG. The tip of the deadbolt engages.

[0008] When the door is opened in this state, the door frame side opens as shown in FIG.
As shown in FIGS. 5 to 5, the guard arm assembly which has been folded in the horizontal direction (horizontal direction) with the vertical pivots resists the urging force of the spring due to the mutual swing (rotation) of the arms about the pivots. As shown in FIGS. 1 and 2, the door opening angle is limited to a required amount at the time of maximum extension as shown in FIGS. Here, confirmation of visitors, delivery of mail, and the like are performed.

[0009] To lock the door, the interior and exterior of the key or the indoor-side thumb, for example, 90 degrees to the dynamic operation, as shown in FIG. 8, the engagement of the forearms in the notch portion of the dead bolt lock box in hole a maximum protruding state on through interpolation to be engaged in the locking latching entry apertures on projecting piece of the strike which is fixed to the door frame. Here, the door is held in a locked state that is immovable with respect to the door frame.

It is needless to say that in order to unlock the guard arm operating state of the door or the locked state of the door, the thumb turn or the key may be operated in the opposite direction to the above.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A guard arm lock according to the present invention will be described below with reference to an embodiment shown in the drawings. In the drawings, FIG.
2 and 7 show the operating state of the guard arm assembly, FIGS. 3 to 6 show the closed state at normal times (when unlocked) when the door is freely opened and closed, and FIG. 8 shows the locked state of the door. Is shown.

1 to 5, reference numeral 1 denotes an outward opening door,
11 is the outside of the door 1, 12 is the inside of the door 1, and 13 is the door 1.
2, a fixed door frame 2 and a step 21 with which the door 1 contacts when closed.

The lock box 3, which is fixed to the indoor side 12 of the exterior door 1 by imposing with screws 91, is, for example, a rectangular parallelepiped formed in the lateral direction (horizontal direction) at the free side edge of the door 1. It has a notch 31 that is shaped to fit .

The lock box 3 has a cylinder lock 41 on the outdoor side into which a key (not shown) is inserted and a thumb turn 42 on the indoor side.
And they are associated with the dharma assembly 51.

Referring to FIGS. 6 to 8, reference numeral 61 denotes a dead board integrally connected to the dead bolt 6 by a stud 62 or the like. To slide. As guide means for sliding the dead board 61, well-known guide means such as a combination of a long hole 33 or a long groove provided in the side plate 32 of the lock box 3 and a pin 63 fixed to the dead board 61 can be adopted.

The advance of the dead board 61 in the vertical direction is caused by the first cam 5 mounted on the dharma assembly 51 described above.
The second and third cams 53 are achieved by contacting the first contact portion and the second contact portion 65 of the dead board 61 having a U-shaped cross section, respectively. This is achieved by the first cam 52 abutting on the third contact portion 66 at the rear portion.

In short, the dead bolt 6 including the dead board 61 is rotated by the thumb turn 42 or the key.
The unlocked position in the stowed state (FIG. 6) and the guard arm operating position in the semi-extended state (FIG. 7) via the linkage mechanism 5 including the dharma assembly 51, the first cam 52, the second cam 53, and the like.
It is operated in the vertical direction (vertical direction) over three positions of the locking position (FIG. 8) in the maximum protruding state.

Reference numeral 34 denotes a cut end of the dead bolt 6.
Reference numeral 35 denotes a through hole provided in the lock box 3 for projecting toward the notch 31, and reference numeral 35 denotes a receiving hole provided in the lock box 3 into which the tip of the dead bolt 6 is fitted when the dead bolt 6 is maximally protruded.

The first contact portion 64 is formed on one side plate of the dead board 61 having a U-shaped cross section, and the second contact portion 65 is formed on the other side plate of the dead board 61. In the space of the dead board 61, a stopping means 10 for preventing the dead bolt 6 from being intentionally pulled out at the guard arm operating position (FIG. 7) is provided.

The stop means 10 is provided with a rocking plate 101 urged by a torsion spring 102 in a direction in which the locking portion 103 is engaged with the corresponding portion 36 of the lock box 3 on the horizontal axis 10 of the dead board 61.
In the guard arm operating position, the locking portion 103 of the swing plate 101 is engaged with the corresponding portion 36, and when the dead board 61 further advances toward the locking position, Before the second cam 52 comes into contact with the second contact portion 65 of the dead board 61, the second cam 52 comes into contact with the swing plate 101 to release the engagement of the stopping means 10.

The thumb turn 42 is used for both forward and backward sliding at the storage position of the dead board 61 carrying the dead bolt 6, backward sliding at the guard arm operating position, and forward and backward sliding at the locking position. Unless operated, each can be blocked and held at each position because of the abutment at the start or end of the guide means and the abutment of the dead board 61 of the first cam 52 or the second cam 53. This is because the contact with 64, 65 or 66 acts as a stopper.

The unlocking position, guard arm operating position and locking position of the dead board 61 including the first cam 52 or the second cam 53 and the dead bolt 6 are located near the dharma assembly 51 and near the tip of the dead board 61. Publicly-known click means 50, 60 provided respectively for
Is stably held by Then, the click means 50 and 60 inform the fingers grasping the thumb turn 42 of each position tactilely.

The linking mechanism 5 for displacing the dead bolt 6 in three directions by operating the thumb turn is not limited to the illustrated example. If various conventional linkage mechanisms used for bolts are set by changing the direction by 90 degrees, the lock mechanism can be adopted for the guard arm lock of the present invention.

On the indoor side of the door frame 2, a plate-shaped strike 7 integrally and separately provided with a protruding piece 71 protruding in a horizontal direction (horizontal direction) is fixed by imposing with screws 92. I do. The strike 7 is a door frame 2 in which the protruding piece 71 is loosely fitted in the cutout 31 of the lock box 3 when the door 1 is closed.
Attach any position in.

The projecting piece 71 is provided with a vertical locking engagement hole 72 with which the dead bolt 6 can be engaged in a maximum projecting state when the door is closed.

On the indoor side of the door frame 2, a front arm 81 is further provided.
At least one connecting arm 82 is attached, and a telescopic guard arm assembly 8 that is linearly folded in the horizontal direction when the door is closed is attached.

A vertical guard arm, which is aligned with the locking engagement hole 72 of the strike 7 when the door is closed on the horizontal projection plane, and which can selectively engage with the dead bolt 6 in a semi-projected state, is provided at the distal end side of the front arm 81. An operation engagement hole 83 is open.

When the dead bolt 6 is protruded to the maximum projecting state, it engages with both the engaging holes 72 and 83, and the door 1 is locked to the projecting piece 71 of the strike 7 via the dead bolt 6. Will be. At this time, the guard arm assembly 8 cannot of course operate.

Between the base end side of the front arm 81 and the guard arm mounting portion of the door frame 2, a longitudinal pivot 8 is provided at both ends.
At least one linking arm 82 with
And a torsion spring or any other spring 8 biasing the guard arm assembly 8 in a direction in which the guard arm assembly 8 is folded.
We mount 5.

As shown in FIGS. 3 to 6, when the door is closed in the unlocked state in which the dead bolt 6 is stored, the guard arm assembly 8 is linearly formed along the strike 7 by the bias of the spring 85. Folds automatically.

At this time, the distal end side of the front arm 81 is vertically positioned between the projecting piece 71 of the strike 7 in the notch 31 of the lock box 3 and the through hole 34 (or the distal end of the dead bolt 6) of the lock box 3. And the guard arm actuation engagement hole 83 of the front arm 81 is aligned with the locking engagement hole 72 of the strike 7 on the horizontal projection plane.

In the illustrated example (see FIGS. 2 to 5), the base end side of the guard arm assembly 8, that is, the base end side of the rearmost connecting arm 82 is a mounting piece that also serves as the projecting piece 71 of the strike 7. Although it is pivotally mounted with the pivot 84, it is needless to say that the mounting piece (71) may be provided separately from the strike 7 at another location of the door frame 2.

The shape of the guard arm operating engagement hole 83 of the front arm 81 is circular or oblong, and the semi-projecting dead bolt 6 is engaged with the engagement hole 83 when the guard arm assembly 8 is operated. It is desirable that at least a portion abutting on the engagement hole 83 has a circular cross section. This configuration is adopted to smooth the displacement of the front arm 81 that swings or moves with respect to the dead bolt 6 according to the opening and closing of the door.

The dead bolt 6 in the illustrated example is formed by cutting the lock box 3.
The guard arm operating position or the locking position can be projected by displacing the notch 31 upward. However, the guard bolt operating position can be reduced by displacing the deadbolt downward by changing the design slightly. Or it can be made to be able to protrude into the locking device.

[0035]

According to the guard arm lock of the present invention described above, the guard arm assembly is not provided along the dust between the door and the door frame, but is provided horizontally on the indoor side of the door and the door frame. Since it is provided so that it can be folded in the direction,
In the mounting, there is no need to consider the dust size at all, and the operation of the guard arm can be made extremely smooth without twisting or digging.

Further, since the mounting of the lock box to the door and the installation of the strike to the door frame can be performed without requiring any dug portion, the work of mounting the entire guard arm lock at the site is significantly improved. I will do it.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a guard arm operating state in an embodiment of a guard arm lock of the present invention.

FIG. 2 is a plan view of the lock box with the position of the lock box cut away in the guard arm operating state.

FIG. 3 is a plan view of the lock box when the door is closed and the position of the lock box is cut away in an unlocked state.

FIG. 4 is a side view of the unlocked state when the door is closed.

FIG. 5 is a front view of the strike and guard arm assembly taken along line VV of FIG. 4;

FIG. 6 is an enlarged partial longitudinal side view showing the relationship between the locking mechanism when the door is closed in the unlocked state, the engagement hole of the strike projection, and the engagement hole of the front arm.

7 is an enlarged partial longitudinal side view showing the same relationship as in FIG. 6 when the door is closed in the guard arm operating state.

FIG. 8 is an enlarged partial vertical cross-sectional side view showing a relationship similar to that of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Door 12 Indoor door 13 Free side edge 2 Door frame 3 Lock box 31 Notch 42 Thumb turn 5 Linking mechanism 6 Dead bolt 7 Strike 71 Protrusion piece (mounting piece) 72 Locking hole 8 Guard arm assembly 81 Front arm 82 Connecting Arm 83 Guard Arm Actuating Entrance Hole 84 Axis 85 Spring

Claims (2)

(57) [Claims] An exterior door is provided on an inner free side edge thereof.
Form a notch on the side of the lock box that opens to the free edge of the door.
Of the lock box part facing up and down with this notch
On the other hand, it can be moved up and down along its length
At the same time, by operating the thumb turn on the indoor side, through the interlocking mechanism, the unlocked position in the stored state, the guard arm operating position in the semi-projected state into the cutout portion, and the locked position in the maximum projected state are provided. Provide a driven dead bolt,
The strike fixed to the door frame protrudes horizontally
And the protruding piece with the locking engagement hole
A guard arm assembly consisting of a front arm and a connecting arm that are foldably linked and connected in a vertical direction,
The base end of the connecting arm can be turned in a strike through the mounting piece
With the free end forward through a vertical pivot
Connected to the base end of the arm, and to the free end of the forearm
Open the engagement hole for guard arm operation, and on the other hand,
Guard arm assembly by the elasticity of the springs applied to both ends of the arm
Body folded and the connecting arm pivots indoors.
And guard arm assembly
When the specifications of the dead bolt and the mutual positional relationship are closed,
The protruding piece and the free end of the forearm are loosely fitted into the cutouts in the lock box.
Engagement, locking engagement holes, guard arm activation engagement holes and
Dead bolts must be aligned in the horizontal projection plane.
When the dead bolt is in the guard arm operating position,
Tip engages only with forearm, dead bolt is locked
Engagement for front arm guard arm activation when in position
Set so that the hole is inserted and engages with the locking hole of the protruding piece
Guard arm lock, characterized in that it was. 2. The guard arm lock according to claim 1, wherein a strike piece of the strike and a mounting piece for the guard arm assembly are integrally formed.