JPH0436368Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is a locking device for keeping a door closed;
In particular, the present invention relates to a door locking device that can automatically lock a door at the same time as the door is closed.

(Prior Art) Conventional door locking devices have a large number of parts and a complicated structure, making it difficult to reduce manufacturing costs. In addition, the handle, which is the means for opening and closing the door, protrudes significantly from the front of the door, which obstructs traffic.

(Problems to be Solved by the Invention) Therefore, the purpose of the invention is to have a simplified structure with a relatively small number of parts, so that manufacturing costs can be reduced, and the means for opening and closing the door can be reduced. Since it does not protrude much beyond the front of the door, it does not obstruct traffic, etc., and the door can be accurately maintained in a locked state, making it suitable for use in operation panels and control panels for electrical equipment where access by unauthorized persons is discouraged. An object of the present invention is to provide a door locking device.

(Means for Solving the Problems) As explained below using the reference numerals in the attached drawings, in the door locking device of the present invention, the rear surface 18 of the flat handle 7 embedded in the door 1 is fixed to the left and right sides. A pair of bearing plates 2, 2 are provided in a protruding manner, and each bearing plate 2 is provided with a receiving groove 16 in the front-rear direction into which a lock rod 9 fixed to the fixed frame enters from the rear side.

A latch 6, which has an inverted L-shape in side view and has a horizontal arm part 17 connected to the rear side of the upper end of the vertical arm part 5, is housed between the bearing plates 2, 2, and a latch 6 is placed in a position close to the front end of the receiving groove 16. The upper end of the vertical arm part 5 is pivotally connected to the bearing plates 2, 2 by a horizontal pivot 10 parallel to the rear surface 18 of the handle 7, and the horizontal pivot 10 is disposed at a position forward of the center of gravity of the latch 6.

A lock bar 9 is attached to the lower surface of the rear end of the horizontal arm portion 17.
The rear surface 3a of the cam projection 3 is formed into an inclined surface that approaches the rear surface 18 of the handle toward the tip, and the rear surface 3a of the cam projection 3 is formed into an inclined surface that approaches the rear surface 18 of the handle toward the tip, and the rear surface 3a of the cam projection 3 is formed as an inclined surface closer to the rear surface 18 of the handle, and the rear surface 3a of the cam projection 3 is formed as an inclined surface that approaches the rear surface 18 of the handle toward the tip. A recess 4 is provided in which the lock rod 9 engages and disengages, and a passive slope 5a is provided on the front side of the lower end of the vertical arm 5.

A push button 8 is inserted into the through hole 19 in the front and back direction of the handle 7.
is inserted, the push button 8 is urged back forward by the spring 12, and a drive slope 8a that contacts the passive slope 5a of the latch 6 is provided on the upper surface side of the rear end of the push button 8, and the drive slope 8a is brought close to the push button 8. The lock unit 13 is housed and fixed in the handle 7, and a stop plate 14 that engages and disengages from the rear surface of the lower end of the vertical arm 5 of the latch 6 is fixed to the rear end of the rotor 15 of the lock unit 13.

(Embodiment) In the illustrated embodiment, the main body portion of the handle 7 is fitted into the mounting hole 21 of the door 1 and fixed, and only the front edge frame portion 22 protrudes from the front of the door 1. The push button 8 and the lock unit 13 are installed in the upper half of the handle 7, and the lower half of the handle 7 is provided with a pull-type recess 11 into which the operator's fingertip is inserted.

The spring 12 is composed of a compression coil spring,
The spring receiving protrusion 23 on the upper surface of the push button 8 is in contact with the stepped shoulder surface 24 of the through hole 19. Lock bar 9
is fixed to a fixed frame (not shown) such as the main body of the control panel storage box.

(Function) When the door 1 is closed, the locking rod 9, which has apparently approached from the rear side of the handle 7, moves into the receiving groove 1 of the bearing plate 2.
6 and comes into contact with the cam projection 3 of the horizontal arm portion 17 of the latch 6. When the door 1 continues to be closed further, the circumferential surface of the locking rod 9 pushes against the inclined rear surface 3a of the cam protrusion 3, so that the latch 6 is pushed up and rotated counterclockwise in FIG. 3 about the horizontal pivot 10. It will be done.

When the locking rod 9 passes the tip of the cam projection 3 at the end of the closing operation of the door 1, the latch 6 rotates clockwise about the horizontal pivot 10, since the horizontal pivot 10 is located forward of the center of gravity of the latch 6. direction, the latch 6 rotates under its own weight in the direction shown in FIG.
It engages with the locking rod 9 at.

This locks the door 1 to the fixed frame. At this time, the passive slope 5a of the vertical arm 5 of the latch 6 comes into contact with the drive slope 8a of the push button 8, as shown in FIG.

When the key is inserted into the lock unit 13 and the rotor 15 is turned in a predetermined direction to engage the catch plate 14 with the rear surface of the lower end of the vertical arm portion 5 of the latch 6, the latch rotates around the horizontal pivot 10. Since rotation in the clockwise direction is prevented, unauthorized opening of the door 1 by an unauthorized person who does not have the key is prevented.

When the push button 8 is pushed along the through hole 19 in the locked state shown in FIG. 4, the driving slope 8a of the push button 8 pushes the passive slope 5a of the latch 6, so that the latch 6 is locked as shown in FIG. Horizontal axis 1 as shown
0 in the counterclockwise direction, and the engagement between the recess 4 of the latch 6 and the lock rod 9 is released.
Therefore, by pulling the handle 7 while pushing the push button 8, the door 1 is opened.

(Effects of the invention) As described above, the door locking device of the present invention includes a handle 7 that is embedded and fixed in the door 1, and a pair of left and right handles that protrude from the rear surface of the handle 7 and have receiving grooves 16 in the front and back direction. The bearing plates 2, 2, the latch 6 which is housed between the bearing plates 2, 2 and has an inverted L-shape in side view and is pivoted at a position forward of the center of gravity by a horizontal pivot 10, and is fixed to a fixed frame, A lock rod 9 contacts the cam protrusion 3 of the latch 6 and engages with the recess 4, a push button 8 rotates the latch 6 in the unlocking direction, and a push button 8 fits into the through hole 19 of the handle 7 to rotate the latch 6. It consists of a lock unit 13 that locks the lock unit 13, and has a relatively small number of parts and a simplified structure, so that manufacturing costs can be reduced.

In addition, the door 1 is operated by means for opening/closing the door 1, such as a flat handle 7 and a push button 8 installed close to the handle 7.
Since it does not protrude much beyond the front of the vehicle, it does not obstruct traffic, and can be used in narrow passages without any problems.

Furthermore, a lock unit 13 is provided on the handle 7 in close proximity to the push button 8, and rotation of the latch 6 in the unlocking direction is prevented by the stop plate 14 fixed to the rotor 15 of the lock unit 13. It is possible to accurately maintain the locked state of the door 1, and it is suitable for operation panels and control panels related to electrical equipment where access by unauthorized persons is discouraged.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a door locking device according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view of the door locking device. FIG. 3 is an enlarged cross-sectional view of the main part when the lock rod is in contact with the latch, and FIG. 4 is an enlarged cross-sectional view of the main part when the lock rod is engaged with the latch.
FIG. 5 is an enlarged cross-sectional view of the main part when the latch and lock bar are disengaged. 1...Door, 2...Bearing plate, 3...Cam protrusion, 4
... recess, 5 ... vertical arm section, 6 ... latch,
7... Handle, 8... Push button, 9... Lock bar, 10... Horizontal pivot, 11... Pull-type recess, 1
2... Spring, 13... Lock unit, 14... Stop plate, 15... Rotor, 16... Receiving groove, 17...
...Horizontal arm section.

Claims (1)

[Scope of utility model registration request] A flat handle 7 that is embedded and fixed in the door 1
A pair of left and right bearing plates 2, 2 are protruded from the rear surface 18 of the
A receiving groove 16 is provided in each bearing plate 2 in the front-rear direction, into which the lock rod 9 fixed to the fixed frame enters from the rear side.
Horizontal arm part 1 is located on the rear side of the upper end of vertical arm part 5.
A latch 6 having an inverted L-shape when viewed from the side and having a latch 7 connected thereto is housed between the bearing plates 2, 2, and the upper end of the vertical arm 5 is connected to the rear surface 18 of the handle 7 at a portion close to the front end of the receiving groove 16. The horizontal pivot 10 is parallel to the bearing plates 2, 2, and the horizontal pivot 10 is located in front of the center of gravity of the latch 6. Contacting cam protrusion 3
The rear surface 3a of the cam protrusion 3 is formed into an inclined surface that approaches the rear surface 18 of the handle toward the tip,
A recess 4 is provided between the rear surface of the upper end of the vertical arm portion 5 and the front surface of the downward protrusion 3, in which the lock rod 9 is engaged and disengaged.
A passive slope 5a is provided on the front side of the lower end of the vertical arm portion 5, the push button 8 is inserted into the through hole 19 in the front and back direction of the handle 7, the push button 8 is returned forwardly biased by the spring 12, and is pressed. A drive slope 8a is provided on the upper surface side of the rear end of the button 8 to contact the passive slope 5a of the latch 6, and the lock unit 13
is housed and fixed in a handle 7, and a stop plate 14 that engages and disengages from the rear surface of the lower end of the vertical arm part 5 of the latch 6 is fixed to the rear end of the rotor 15 of the lock unit 13.