JPH09291741A - Auxiliary lock for door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of part items and miniaturize a guard arm by providing a magnetic body in the base end part of the guard arm and automatically protruding a spring bolt housed by a spring force when a locking position is set. SOLUTION: A plurality of magnetic bodies 9 and 9 to be contacted with a front wall 12 when closed are provided in the base end part of a guard arm 5 and pivotally supported by a fixing piece 6 so as to be placed opposite a housing body 11. A locking oblong hole part 8 for guiding a receiving stick 14 is communicated to an insertion part 7. A sliding body 13 formed to be a sectional lip groove shape steel and housed to be advanced/retreated, the spring bolt 14 having a rear end part 14b fixed to the sliding body 13 and a return spring 15 are disposed in the housing body 11 fixed in a vertical frame 1a. Thus, when locking, the sliding body 13 is attracted by the magnetic bodies 9 and 9 and protruded by opposing the guard arm 5 and the front wall 12 to each other, the spring bolt 14 is inserted into the insertion part 7 and then inserted into the locking long hole 8 and locked. Thus, the number of constituting part items is reduced.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an auxiliary lock for a door. This auxiliary lock is used when the resident partially opens the door to confirm the visitor.

[0002]

2. Description of the Related Art Conventionally, an auxiliary lock for this door is fixedly provided, for example, on a vertical frame of an opening frame, and a receiving rod device for accommodating a receiving rod that appears and disappears in a horizontal direction, and a free opening / closing door. The guard rod is attached to an end portion and is manually rotated to the receiving rod device side when the opening / closing door is closed, and then comprises a guard arm engageable with the receiving rod, and the receiving rod rotates the guard arm to a locked position. At times, it is characterized in that it is inserted into the insertion portion of the guard arm through the interlocking lever and the operating projection on the receiving rod device side that is pushed against the inner wall surface of the guard arm.

Such an embodiment has the advantage that the receiving rod automatically projects when the guard arm is rotated to the locked position, but on the other hand, the guard arm must be pressed against the front wall of the rod device. There was a drawback that the head of the receiving rod did not completely penetrate the insertion part of the guard arm. In addition, because of the combination of the actuating protrusion and the interlocking lever that are pressed against the guard arm, the upper and lower widths of the guard arm must be widened, and it is difficult to reduce the size of the guard arm. There was a flaw. Further, there is a problem that the head portion of the receiving rod and the operating projection are projected from the front wall of the receiving rod device except when locked.

[0004]

SUMMARY OF THE INVENTION The first object of the present invention is to achieve the conventional advantage that the receiving rod automatically projects when the guard arm is rotated to the locked position with a small number of components. It is possible. The second aspect of the present invention
The purpose of is that it is easy to reduce the size of the guard arm. Further, a third object of the present invention is that a part of the members forming the receiving rod device does not protrude from the front wall except when locked.

[0005]

The auxiliary lock of the door according to the present invention comprises:
In an auxiliary lock for a door, a guard arm pivotally attached to a free end portion of the opening / closing door engages with a receiving rod of a receiving rod device fixedly provided in the opening frame to limit an opening angle of the opening / closing door. A magnetic material is fixed to the guard arm, while the guard rod has a guard arm separated from the front wall of the guard rod,
The receiving rod retracts via a metal sliding body that slides in the storage body by the spring force of the spring member, while when the guard arm rotates to the locked position, the sliding body springs due to the magnetic force of the magnetic body. The receiving rod is sucked against the spring force of the member, and is inserted into the insertion portion of the guard arm.

Further, in the auxiliary lock of the door of the present invention, the guard arm pivotally attached to the free end of the opening / closing door engages with the receiving rod of the receiving rod device fixedly provided in the opening frame to open / close the opening / closing door. In the auxiliary lock of the door for limiting the opening angle, the first magnetic member is fixed to the guard arm, while the guard rod is separated from the front wall of the guard rod device by The receiving rod retreats through a sliding body that slides in the storage body by the spring force of the spring member, and when the guard arm is rotated to the locked position, the second magnetic body that opposes the first magnetic body. The sliding body having is attracted against the spring force of the spring member by the attraction force of these magnetic substances, and the receiving rod is inserted into the insertion portion of the guard arm.

In each of the above inventions, the receiving body of the receiving rod device comprises a front wall having a fitting recess and a guide box fixedly attached to the front wall, and the guard arm has the receiving rod. When separated from the front wall of the device, the head of the receiving rod is fitted into the fitting recess via a sliding body that slides in the housing.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention shown in the drawings will be described with reference to a relationship between an opening / closing door of an entrance / exit of a building and an opening / closing door.
1 to 7 show the first embodiment. Reference numeral 1 is an opening frame at the entrance of the building. Reference numeral 2 is an opening / closing door provided for the opening frame 1. Reference numeral 3 is an auxiliary lock in which combined constituent members are attached to the opening frame 1 and the opening / closing door 2, respectively, and limits the opening degree of the opening / closing door 2 for the safety of the occupants. Therefore, a main locking device (not shown) is attached to the opening / closing door 2.

The auxiliary lock 3 is fixedly provided on the vertical frame 1a of the opening frame 1 and a receiving rod device 4 for accommodating a receiving rod which appears and retracts in the horizontal direction, and on the other hand, on the free end portion of the opening / closing door 2. It comprises a guard arm 5 which is attached and can be engaged with the receiving rod after being manually rotated to the receiving rod device side (locking position) when the opening / closing door is closed. The auxiliary lock 3 of the present invention is characterized by both the receiving rod device 4 and the guard arm 5.

Therefore, the guard arm 5 will be described first. The guard arm 5 has its base end pivotally supported by a fixed piece 6 screwed to the inner wall surface of the free end of the opening / closing door 2 and rotates horizontally so as to face the storage body of the receiving rod device 4.
Then, 7 is an insertion portion through which the head of the receiving rod can be inserted, and a locking elongated hole portion 8 for guiding the sliding receiving rod is inserted into this insertion portion 7.
Are in communication.

Reference numeral 9 denotes a plurality of magnetic bodies provided at a portion of the guard arm 5 near the base end. These magnetic materials 9
As shown in FIG. 5 to FIG. 7, they are fixed by crimping in the guard arm 5, respectively, and a pair of upper and lower parts are provided. When the guard arm 5 rotates toward the receiving rod device 4 side when the opening / closing door 2 is closed, these magnetic bodies 9 and 9 are located vertically above and below the receiving rod device 4, and in front of the receiving body of the receiving rod device 4. Opposed so that it can touch the wall.

Next, the receiving rod device 4 will be described. The receiving rod device 4 is fixedly provided in the vertical frame 1a of the opening frame 1 as described above, and the front wall 1 of the box-shaped storage body 11 thereof is provided.
2 preferably does not project from the vertical frame 1a as shown in FIG. 1 or FIG.

The receiving rod device 4 is a box-shaped storage body 1.
1, a metal sliding body 13 housed in the housing 11 so as to be movable back and forth, and a head 14a project from the front wall 12 of the housing 11, and a rear end 14b is fixed to the sliding body 13. The receiving rod 14 and the return rod 15 for the receiving rod, which is housed in the housing 11 and has a smaller spring force than the attraction force of the magnetic body 9 on the guard arm 5 side.

Therefore, the box-shaped storage body 11 is
A front wall 12 having a hat-shaped cross-section that is a non-magnetic material (made of steel, aluminum, etc.), upper and lower vertical fixing portions 16a, 16a fixedly attached to the inner wall surface of the front wall 12, and these vertical fixing portions. 16a, a rectangular tube portion 16 that is connected to 16a
b and a guide box 16 each having a vertical rear end portion 16c for closing the rectangular tubular portion. In this embodiment, a fitting recess 17 into which the head 14a of the receiving rod 14 is fitted is formed in the center of the front wall 12, and the neck of the receiving rod 14 is formed in the center of the inner surface of the fitting recess 17. Is provided with a through hole 18 for guiding. When the receiving rod 14 is returned by the return spring 15, the head 14 a of the receiving rod 14 just enters the fitting recess and does not project from the front wall 12.

The sliding body 13 is formed in a lip-grooved steel cross section. Further, a mounting hole 20 located coaxially with the through hole 18 is formed in the central portion of the vertical rear end portion 13a. Further, horizontal portions 13b, 13b extending forward from the upper and lower ends of the vertical rear end portion 13a, respectively.
Each of the front end portions is bent inward by approximately 90 degrees, and is a contact portion 21, 21 that is in surface contact with the upper and lower inner surfaces of the front wall 12.

Further, in the present embodiment, the receiving rod return spring 15 is located between the front wall 12 and the sliding member 13, and the receiving rod 14 is provided.
Is wrapped around the neck. Reference numeral 22 is a projection for preventing backlash and fixing on the rear end portion 14b of the neck of the receiving rod 14 for fixing the receiving rod, and reference numeral 23 is a ring for preventing removal.

In the above structure, when the guard arm 5 is separated from the front wall 12 of the receiving rod device 4 as shown in FIG.
As shown in FIG. 2, the receiving rod 14 of the receiving rod device 4 is automatically retracted to the inside of the storage body 11 by the spring force of the return spring 15, and its head 14 a is inside the fitting recess 17 of the front wall 12. To fit. In this case, the head 14a of the receiving rod 14 does not protrude from the front wall 12 or the vertical frame 1a.

On the other hand, when the guard arm 5 is located on the front wall 12 of the storage body 11 of the receiving rod device 4 as shown in FIG.
That is, when the resident manually rotates the guard arm 5 to the lock position to lock the auxiliary lock 3,
As shown in FIGS. 5 and 6, the upper and lower magnetic bodies 9, 9 of the guard arm 5 face the front wall 12 of the receiving rod device 4. Then, the sliding body 13 located at the back of the storage body 11
Immediately, it is attracted by the magnetic force of these magnetic bodies 9, 9 and moves forward while sliding in the guide box 16 against the spring force of the return spring 15.

Then, the receiving rod 14 which is integral with the sliding body 13 projects from the fitting recess 17 of the front wall 12 and automatically enters the insertion portion 7 of the guard arm 5. At this time, the head portion 14a of the receiving rod 14 penetrates the insertion portion 7 with some margin, and the contact portion 2 of the sliding body 13
1, 21 are in surface contact with the inner surface of the front wall 12.

Therefore, when the opening / closing door 2 is opened, the guard arm 5 moves together with the opening / closing door 2, but at this time, as soon as the neck portion of the receiving rod 14 enters the locking elongated hole portion 8 of the guard arm 5, the receiving arm 14 is received. The head 14a of the rod 14 is securely locked to the locking elongated hole 8 side of the guard arm 5. That is, in this case, the opening / closing door 2 is opened, and as a result, the magnetic bodies 9, 9 of the guard arm 5 are opened.
Is separated from the sliding body 13 in the storage box 11, the receiving rod 14
Is slightly retracted by the spring force of the return spring 15, and its head 1
4a is securely locked to the locking elongated hole 8 side of the guard arm 5.

[0021]

EXAMPLE A magnet is used as the magnetic body 9 in the first example described in the embodiment of the invention. Although the magnetic body 9 is embedded inside the guard arm 5 near the base end, it is not always necessary to embed it. For example, a plate-like magnetic body may be fixed to the inner wall surface of the guard arm 5 near the base end. It may be provided. Further, two magnetic bodies 9 are provided on the guard arm 5 in total, but one magnetic body 9 may be provided as long as the sliding body 13 can be attracted. Further, although the storage body 11 is formed in a box shape, it may be formed in a cylindrical shape. In this case, it is necessary to change the design of the sliding body 13 to the shape of the inner cylinder with respect to the housing 11 as the outer cylinder, but preferably the cylinder should have a rectangular cross section so as not to rotate. Further, the return spring 15 as an example of the spring member is located between the front wall 12 and the sliding body 13, but may be a tension spring located between the sliding body 13 and the vertical rear end portion 16c of the guide box 16. good. Further, the base end of the guard arm 5 may be curved to some extent.

Next, a second embodiment will be described with reference to FIGS. In the description of this example, the same parts as those in the first example described in the embodiment of the invention will be denoted by the same or similar reference numerals and redundant description will be omitted.

The second embodiment differs from the first embodiment in that the magnetic body 30 is provided on the sliding body 13A. That is, the first
Similar to the embodiment, the first magnetic bodies 9A and 9A are embedded in the portion of the guard arm 5A near the base end. On the other hand, on the front surfaces of the upper and lower abutting portions 21A, 21A of the sliding body 13A, the second magnetic bodies 30, 30 opposite to the first magnetic bodies 9A, 9A of the guard arm 5A are fixedly provided, respectively. Has been. In addition, 11A is a storage body and 12A is a front wall.

With this structure, the guard arm 5A
Since the first magnetic bodies 9A, 9A on the side of the slider and the second magnetic bodies 30, 30 on the side of the sliding body 13A attract each other, the sliding body 13A can be moved by a stronger attraction force than in the first embodiment. it can.

[0025]

As is clear from the above description, the present invention has the following effects. (1) With a small number of components, the receiving rod automatically projects when the guard arm is rotated to the locked position. (2) Since the guard arm is provided with the magnetic material, it is easy to reduce the size of the guard arm. (3) Part of the members constituting the receiving rod device does not protrude from the front wall except when locked. Therefore, the projection (member) on the receiving rod device side does not get in the way.

[Brief description of drawings]

1 to 7 are explanatory views for explaining an embodiment of the present invention using a first embodiment. 8 and 9 are explanatory views showing a second embodiment of the present invention. Each explanatory view.

FIG. 1 is a perspective view showing a state in which a guard arm is separated from a front wall of a receiving rod device.

FIG. 2 is a schematic cross-sectional explanatory view of the receiving rod device in FIG.

FIG. 3 is an exploded perspective view of a main part.

FIG. 4 is a perspective view of a state in which the guard arm is rotated to a locked position.

5 is a schematic cross-sectional explanatory view of the receiving rod device in FIG.

FIG. 6 is an explanatory view from the front showing the relationship between the guard arm and the receiving rod device.

FIG. 7 is a schematic sectional explanatory view of a main part.

FIG. 8 is an exploded perspective view of a main part.

FIG. 9 is a schematic cross-sectional explanatory view similar to FIG. 5 when the guard arm is rotated to the locked position.

[Explanation of symbols]

1 ... Opening frame, 2 ... Opening / closing door, 3 ... Auxiliary lock, 4 ... Receiving device,
5, 5A ... Guard arm, 7 ... Insertion portion, 8 ... Locking long hole portion, 9, 9A, 30 ... Magnetic body, 11, 11A ... Storage body,
12, 12A ... front wall, 13, 13A ... sliding body, 14 ... receiving rod, 14a ... head, 15 ... spring member, 16 ... guide box,
21, 21A ... Abutting part.

Claims (6)

[Claims] 1. A door assist for restricting an opening angle of an opening / closing door by engaging a guard arm pivotally attached to a free end portion of the opening / closing door with a receiving rod of a receiving rod device fixedly provided in the opening frame. In the lock, a magnetic material is fixed to the guard arm, while in the receiving rod device, when the guard arm is separated from the front wall of the receiving rod device, the receiving rod is housed in the storage body by the spring force of the spring member. When the guard arm is rotated to the locking position by retracting through the metal sliding body that slides, the sliding body is attracted by the magnetic force of the magnetic body against the spring force of the spring member. Auxiliary lock for the door, characterized in that the receiving rod is inserted into the insertion part of the guard arm. 2. The housing 11 of the receiving rod device 4 according to claim 1, comprising a front wall 12 having a fitting recess 17, and a guide box 16 fixedly attached to the front wall. When the guard arm 5 is separated from the front wall of the receiving rod device, the head portion 14a of the receiving rod 14 is fitted into the fitting recess via the sliding body 13 that slides in the storage body. Auxiliary lock for the door. 3. The door auxiliary lock according to claim 1 or 2, wherein the sliding body 13 is formed into a lip-grooved steel section. 4. A door assist for restricting an opening angle of an opening / closing door by engaging a guard arm pivotally attached to a free end of the opening / closing door with a receiving rod of a receiving rod device fixedly provided in the opening frame. In the lock, the first magnetic body is fixed to the guard arm, while the guard rod has a spring force of a spring member when the guard arm is separated from the front wall of the guard rod device. When the guard arm is rotated to the locked position by retracting through the slide body that slides in the storage body by the above, the slide body having the second magnetic body that opposes the first magnetic body is An auxiliary lock for a door, characterized in that it is sucked against the spring force of a spring member by the suction force of the magnetic body, and the receiving rod is inserted into the insertion portion of the guard arm. 5. The housing 11A of the receiving rod device 4 according to claim 4, further comprising: a front wall 12A having a fitting recess 17;
When the guard arm 5A is separated from the front wall 12A of the receiving rod device, the head 14a of the receiving rod 14A slides in the storage body 13A. An auxiliary lock for the door, which is fitted into the fitting recess via the. 6. The sliding body 13A according to claim 4 or 5, wherein the sliding body 13A is formed in a lip-grooved steel section, and the second magnetic body 30 opposite to the first magnetic body 9A of the guard arm 5A is formed. , The sliding body 1 that comes into contact with the front wall 12A of the storage body 11A
An auxiliary lock for the door, which is fixed to the contact portion 21 of 3A.