JP2533391Y2 - Locking 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 lock device for locking a door, a drawer, and the like that opens and closes on a fixed frame.

[0002]

2. Description of the Related Art Conventionally, for example, in order to lock a door to a fixed frame or the like, a spring-loaded latch bolt is incorporated in the door, and when the door is closed, the latch bolt is automatically inserted into a bolt hole provided on the fixed frame side. 2. Description of the Related Art A lock device having a structure that can be unlocked by operating a knob integral with a latch bolt and moving the latch bolt against an urging spring when the lock device is inserted and locked and opened is widely used.

[0003]

In such a lock device, when trying to open the door, hands are held on knobs such as levers and knobs, and the latch bolt is held at a position retracted from the bolt hole. Must be kept. If the door is tall, it is desirable to lock it in several places.However, if this kind of locking device is used in more than one place, it is necessary to put your hands on In addition, there is a problem that this lock device cannot be used.

In this invention, a stopper member is provided on the lock device so that once the latch bolt is retracted from the bolt hole, the stopper can prevent the latch bolt from advancing toward the bolt hole. Accordingly, it is an object of the present invention to solve the problem of the related art.

[0005]

In the present invention , the invention
Attachment to the opening / closing plate to lock the closing plate to the fixed frame
Housing with mounting means and slidably mounted on the housing
The housing end is housed under the action of the first urging means, and
A latch bolt extending from the latch and engageable with the fixed frame.
It is assumed that the lock device has the following.

The feature of this invention is that the rack
Tibolts, from the housing to the outside of the open / close plate
With a knob for operating the extending latch bolt,
, The first end of which is pivotally supported and the second end opposite thereto is pivotable
A stopper member, and the stopper member is
The second end is turned by a second urging means provided at the
Can be turned toward the engagement end of the latch bolt.
And a distance from the pivoted position to the second end.
The separation is formed longer than the distance to the engagement end.
And to exist.

[0007]

The opening and closing plate to which the lock device according to the present invention is attached is
When this is closed, for example, the latch bolt urged by the first urging means enters the bolt hole provided on the fixed frame side, and at the same time, the stopper is provided on the peripheral edge of the fixed frame against the second urging means. So that it fits in the groove. In the lock device in this state, when the knob is pressed to retract the latch bolt from the bolt hole, the stopper comes off the concave groove and the second lock is released.
It turns by the action of the urging means, and is lined up with the latch bolt along the sliding direction. Next, when the pressing force applied to the knob is released and the latch bolt is advanced again by the action of the first urging means, the stopper made longer than the latch bolt comes into contact with a part of the fixing frame. Thereby, further advance of the latch bolt can be stopped, and entry into the bolt hole can be prevented.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of this invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of a switchboard 1 using a lock device 4 according to the present invention. The switchboard 1 is tall, and a door (opening / closing plate) 3 which is attached to the fixed frame 2 so as to open and close by turning is provided with lock devices 4 at two upper and lower positions. The door 3 may be locked at only one place in the middle of its height to the fixing frame 2, but it is desirable to lock it at at least two places as shown in the figure because of its high height. The lock device 4 is particularly convenient when used in such a case.

FIG. 2 is a partial perspective view of the switchboard 1 showing a state in which the door 3 closed with respect to the fixed frame 2 is locked by the lock device 4, and a part thereof is cut away. The locking device 4 includes a housing 8 having a top plate 7, a groove-type fixing metal 9 and a screw 10 for attaching the housing 8 to a door, a latch bolt 11 housed in the housing 8, and a stopper 1.
2. It is composed of a knob 13 for operating a latch bolt 11 extending outside the housing 8. The fixed frame 2 is provided with an inner wall 18 having a concave groove 14 formed by cutting off an edge and a bolt hole 15, and the concave groove 14 has a stopper 1.
The second free end 12 </ b> B is housed therein, and the engagement end 16 of the latch bolt 11 enters the bolt hole 15. The door 3 is locked to the fixed frame 2 by this approach. The top plate 7 projects outward from the outer periphery of the housing 8 to form a flange portion. Therefore, the lock device 4 can be attached by fitting it into a mounting hole (not shown) provided on the outer surface of the door 3 and clamping the door 3 in the thickness direction between the flange portion and the fixing metal 9.

FIG. 3 is a sectional view taken along line XX of FIG. In this figure, the lock device 4 is in a locked state in which the latch bolt 11 is inserted into the bolt hole 15 of the fixed frame 2. The top plate 7 of the housing 8 has a through hole 21 through which a knob 13 integral with the latch bolt 11 projects to the outer surface of the door 3.
In the through hole 21, the knob 13 is located at a position on the right side, and is in contact with a contact plate 22 that stands on the top plate 7. By pushing the knob 13 in the direction of the arrow 17, the inside of the through hole 21 can be slid leftward and the latch bolt 11 can be retracted from the bolt hole 15. This is because the latch bolt 11 is in sliding contact with the top plate 7 and the bottom plate 23 inside the housing 8 and is movable in the left-right direction. A first urging spring 26 is provided between the side wall 24 of the housing 8 and the rear end 25 of the latch bolt 11.
Interposes the latch bolt 11 to the right,
Biased to move forward. The latch bolt 11 has a hollow portion 11C whose front and rear end surfaces are open. A stopper 12 is pivotally supported at the rear end portion of the hollow portion 11C by a pivot pin 27 perpendicular to the plane of the drawing. A second biasing spring 28 that biases the stopper 12 clockwise is provided between the upper inner wall of the latch bolt 11 and the stopper 12.

FIG. 4 is a sectional view when the lock device 4 of FIG. 3 is in an unlocked state. In FIG.
When the latch bolt 11 is retracted to the left against the first biasing spring 26 until the stopper 12 and the latch bolt 11 are disengaged from the concave groove 14 and the bolt hole 15 respectively, the unlocked state is obtained. become. The stopper 12 pivots clockwise by the action of the second biasing spring 28, and the latch bolt 11
The stopper 12 and the latch bolt 11 come into contact with each other in the sliding direction of the latch bolt 11 so as to be substantially parallel to each other. Distance L ₁ from the center of the pivotally supporting pin 27 to the engagement end 16 are smaller than the distance L ₂ to the stopper free end 12A. Accordingly, when the pressing force of the knob 13 is released, the latch bolt 11 which is going to move rightward due to the action of the first biasing spring 26 moves the stopper 12 between the recessed groove and the bolt hole 15 to the inner wall 18. Upon impact, further forward movement is hindered, and the engagement end 16 stops before being inserted into the bolt hole 15. The door 3 in which the lock device 4 is in such a state can be opened without supporting the knob 13 by hand. When the door 3 is opened, the contact of the stopper 12 with the inner wall 18 is released, and the latch bolt 11 moves rightward until the knob 13 contacts the contact plate 22. When the latch bolt 11 when closing the door 3 is retracted once after the oblique side 11A abuts against the edge of the inner wall 18, for example, the edge of the bottom of the concave groove 14, when the latch bolt 11 comes to a position facing the bolt hole 15 again, It moves forward to the locked state shown in FIG. On the other hand, the stopper 12 fits into the concave groove 14 from above, and is in the state shown in FIG.

FIGS. 5 and 6 show a first urging spring 26 and a second urging spring 26.
FIG. 6 is a sectional view (FIG. 5) and a partially exploded view (FIG. 6) similar to FIG. 4 illustrating another embodiment of the biasing spring 28.
As is clear from these figures, the first biasing spring 26 provided on the bottom of the housing has one end supported from the inside by a support pin 24A provided on the side wall 24, and the opposite end provided on the housing groove provided on the latch bolt 11. 40, latch bolt 11
Is urged toward the bolt hole 15. The second biasing spring 28 is a coil spring whose both free ends are open in a V-shape.
One of the free ends is locked to the inner side wall 11B of the latch bolt 11, and the other end is bent in an inverted V-shape, locked to the locking projection 12A of the stopper 12, and pivots the stopper 12 clockwise. You are urging you to. A push nut 41 is press-fitted into the free end of the pivot pin 27 so that the stopper 12 and the second biasing spring 28 do not fall out of the pivot pin 27.

FIG. 7 is a sectional view similar to FIG. 3, but showing still another embodiment of the lock device 4. As shown in FIG. In this figure, the biasing spring 2
6A also functions as the first urging spring 26 and the second urging spring 28 in FIG. The urging spring 26A is interposed between the rear wall 24 of the housing 8 and the rear end 32 of the stopper 12, urges the stopper 12 to rotate clockwise, and latches the latch bolt 11 via the pivot pin 27. To the right.

In each of the illustrated examples, as shown in FIG.
By providing the wires 5 and 36, connecting them, and inserting and fastening a wire or the like, it is possible to prevent the knob 13 from being accidentally operated.

[0015]

[Effect of the Invention] Since the latch bolt once retracted from the bolt hole is prevented from re-entering the bolt hole by the stopper interlocking with the retraction of the latch bolt, the locking device in the unlocked state needs to be manually operated. You can open the door even if you do not support it.

[Brief description of the drawings]

FIG. 1 is a perspective view of a switchboard using a lock device according to the present invention.

FIG. 2 is a perspective view showing a cut-away surface of a switchboard to which a lock device is attached.

FIG. 3 is a sectional view taken along line XX of FIG. 2;

FIG. 4 is a sectional view similar to FIG. 3, with the locking device in an unlocked state;

FIG. 5 is a sectional view similar to FIG. 4, showing another embodiment.

FIG. 6 is an exploded view of the latch bolt in FIG. 5;

FIG. 7 is a sectional view similar to FIG. 3, showing still another embodiment.

[Explanation of symbols]

 2 Fixed frame 3 Movable plate 4 Locking device 8 Housing 11 Latch bolt 12 Stopper member (Stopper) 12A Free end 13 Knob 16 Engagement end 26 First urging means 28 Second urging means 30 Second end

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Creator Seiji Takahashi 184-1, Maiokacho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside Nifco Co., Ltd. (72) Yasushi Ueki 184 Maiokacho, Totsuka-ku, Yokohama-shi, Kanagawa Nifco, Inc. (72) Inventor Tsuyoshi Asai 2-1-1, Uchikanda, Chiyoda-ku, Tokyo Tochigi Indoor Co., Ltd.

Claims (2)

(57) [Scope of request for utility model registration] (1)The opening for locking the opening / closing plate to the fixed frame
Housing with mounting means for closing plate and housing
The engagement end is slidably housed in the housing under the action of the first biasing means.
Can extend from the housing and engage with the fixed frame.
A locking device having a latch bolt. The latch bolt is provided with the opening / closing plate from the housing.
Provide a knob for operating the latch bolt that extends outside the
At the same time, the first end is pivotally supported and the opposing second end is pivoted.
A rotatable stopper member is provided, and the stopper member is
The second urging means provided in the locking device is turned to
Orienting the second end toward the engagement end of the latch bolt
And from the pivoted position to the second end
Is formed longer than the distance to the engagement end.
The lock device described above. 2. The first urging means also serves as the second urging means.
The locking device according to claim 1, wherein the locking device is provided .