JP2724452B2 - Lock handle device for waterproof door - 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 handle device for a door, which is used in a switchboard storage box or the like, and in which a stopper plate is detached from a receiving portion on a fixed frame side by rotating a handle by a predetermined angle. .

[0002]

2. Description of the Related Art In a door lock handle device disclosed in Japanese Utility Model Publication No. 43-8300, an operation shaft portion of a handle is rotatably inserted into a shaft hole of a receiving body fixed to a door.
A stopper plate that is engaged with and disengaged from the receiving portion on the fixed frame side is connected to the tip of the operating shaft portion, and a receiving hole that opens to the front side is provided on the operating shaft portion,
A latch that engages with the inner surface recess of the shaft hole from the inner wall through hole of the receiving hole and locks the operation shaft portion so that it cannot rotate with respect to the receiving body is accommodated at the distal end of the receiving hole, and the front end of the receiving hole. The lock unit is housed and fixed to the operation shaft part, and a joint member provided at the tip end with a cam part for driving the latch to protrude and retract from the inner through hole is rotatably housed in the intermediate part of the receiving hole, and The front end is operably connected to the rotor of the lock unit.

A problem when such a door lock handle device is applied to a switchboard storage box or the like installed outdoors is that rainwater that has entered through a keyhole of a rotor of the lock unit fixes the lock unit. It penetrates into the receiving hole of the operation shaft portion from the gap between the main body and the rotor, reaches the inside of the receiving hole through the inner wall through hole and the gap through the inner wall of the receiving hole along the inner surface of the receiving hole,
Furthermore, by entering the box through the gap between the shaft hole and the operating shaft portion along the inner surface of the shaft hole, it may cause corrosion of the internal electric equipment or cause an electric leakage accident.

As a waterproof measure, it has been proposed to provide an annular groove on the outer peripheral surface of the operation shaft portion and fit an O-ring which presses against the inner surface of the shaft hole into the annular groove. In order to prevent the movement of rainwater transmitted from the gap, it is necessary to provide the annular groove in a small-diameter portion closer to the distal end than the inner wall through hole.

However, providing the annular groove in the small-diameter portion of the operation shaft portion in this way means to further reduce the cross-sectional area of the portion. Since an external force such as a rotational force or an impact force caused by contact with another object directly acts, the reduction of the cross-sectional area is disadvantageous in that the strength characteristic of the operation shaft portion against torsion and bending is reduced.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to accurately prevent rainwater from entering through a gap between an inner wall through hole and a latch without lowering the torsional strength and bending strength of the operating shaft. An object of the present invention is to provide a lock handle device for a waterproof door that can be prevented.

[0007]

Means for Solving the Problems Hereinafter, a lock handle device for a door will be described with reference numerals in the accompanying drawings.
The operating shaft portion 5 of the handle 4 is rotatably inserted into the shaft hole 3 of the receiving main body 2 fixed to the door 1, and the metal receiving portion 7 on the side of the fixed frame 6.
A stopper plate 8 which engages with and disengages from the front end of the operating shaft portion 5 is provided with a receiving hole 9 opened on the front side of the operating shaft portion 5. Latch 1 that locks operation shaft 5 so that it cannot rotate with respect to seat body 2 by engaging with
2 is housed in the front end of the receiving hole 9, and the lock unit 13 is housed in the front end of the receiving hole 9 and fixed to the operation shaft 5,
2 is rotatably housed in a middle portion of the receiving hole 9 with a cam member 14 for driving the 2 from the inner wall through hole 10 at the front end thereof, and the front end of the joint member 15 is attached to the rotor 16 of the lock unit 13. They are linked so that they can be linked. In the present invention, an annular groove 17 is provided on the outer peripheral surface of the joint member 15, and an O-ring 18 that presses against the inner surface of the receiving hole 9 of the operation shaft 5 is fitted into the annular groove 17.

In the closed state, the door 1 is locked so that it cannot be opened relative to the fixed frame 6 by the engagement of the stopper plate 8 with the receiving portion 7. The tip of the latch 12 is the seat body 2
Is engaged with the inner recessed portion 11 of FIG. To open door 1,
A predetermined key 2 is inserted into the keyhole 19 of the rotor 16 of the lock unit 13.
0, and the lock of the rotor 16 with respect to the fixed body 13a of the lock unit 13 is released.
6 is rotated in a predetermined direction.

The joint member 15 is linked with the rotor 16.
The tip of the latch 12 driven by the cam portion 14 escapes from the concave portion 11 on the inner surface of the seat body 2 and is pulled into the through-hole 10 on the inner wall of the operation shaft portion 5. As a result, the locking of the operation shaft 5 with respect to the receiving main body 2 is released, so that the handle 4 is rotatable, and by turning the handle 4 in a predetermined direction, the stopper plate 8 is connected to the metal receiving portion on the fixed frame body 6 side. Leave 7 Therefore, door 1 is handle 4
Is released by pulling it toward you.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, a cylinder lock incorporating a known pin tumbler lock mechanism or a disk tumbler lock mechanism is used as the lock unit 13, and a fixed main body of the lock unit 13 is operated by an operation. Only the rotor 16 integrally formed with the shaft portion 5 and mounted with a disk tumbler is inserted into the receiving hole 9 of the operation shaft portion 5, and a retaining ring 41 is fitted to the tip of the rotor 16. The interlocking shaft portion 16a of the rotor 16 having an oval cross section is fitted into the split groove portion 21 at the front end of the cylindrical joint member 15. The cam portion 14 of the joint member 15 is eccentrically protruded from the distal end surface, and is inserted into the passive groove 22 at the base end of the latch 12.

The stopper plate 8 is fitted to the distal end corner shaft portion 5a of the operation shaft portion 5 through the square hole 23 at the base end portion, and is connected to the operation shaft portion 5 by the fastening bolt 25 via the washer 24. . A cap 26 for closing the front surface of the lock unit 10 is pivotally attached to the handle 4. A shaft portion 27 of the cap 26 is inserted into a through hole 28 of the handle 4, and a retaining screw 29 is screwed into the shaft portion 27, and the cap 26 is inserted between the washer 30 of the screw 29 and the handle 4 on the handle side. A compression coil spring 31 that draws similar is inserted.

An annular receiving groove 32 is provided on the inner surface of the front end portion of the shaft hole 3 of the receiving body 2, and an O-ring 33 which is pressed against the outer peripheral surface of the operating shaft portion 5 is fitted into the annular receiving groove 32. . The O-ring 33 prevents rainwater from entering from the joint between the seat main body 2 and the handle 4. The bearing body 2 has the bearing cylinder 35 inserted into the mounting hole 34 of the door 1, the rear projection 37 of the intermediate flange 36 is inserted into the rotation stopping hole 38 of the door 1, and the nut is screwed to the bearing cylinder 35. By 39, it is fastened and fixed to the door 1. A circular packing 40 is inserted between the intermediate flange 36 and the door 1, and the packing 4
Numeral 0 prevents rainwater from entering through the mounting hole 34 and the rotation stopping hole 38.

[0013]

As described above, in the present invention, the annular groove 17 is provided on the outer peripheral surface of the joint member 15, and the O-ring 18 that is pressed against the inner surface of the receiving hole 9 of the operation shaft 5 is fitted into the annular groove 17. Therefore, the keyhole 1 of the rotor 16 of the lock unit 13
The rainwater that has entered from the inside 9 enters the receiving hole 9 of the operation shaft portion 5 from the gap between the tumbler of the rotor 16 and the tumbler receiving groove, and travels along the inner surface of the receiving hole 9 to pass through the inner wall through hole 10 and the latch 12. The shaft reaches the middle of the shaft hole 3 of the seat body 2 from the gap between them, but thereafter the movement is completely prevented by the O-ring 18, so it is fixed from the gap between the shaft hole 3 and the operation shaft portion 5. It does not enter the frame 6 and has a high waterproof function against rainwater from the keyhole 19.

In the present invention, since the O-ring annular groove is not provided in the operating shaft 5 of the handle 4, there is no danger that the strength of the operating shaft 5 against torsion or bending will be reduced. The member 15 transmits the rotational force of the rotor 16 to the latch 12 and is not a member to which a large torsional force or bending force is originally applied.
Even if the annular groove 17 is provided in 5, there is no problem in strength.

[Brief description of the drawings]

FIG. 1 is a front view of a locked state of a lock handle device for a waterproof door according to an embodiment of the present invention.

FIG. 2 is a right side view showing a main portion of the door lock handle device in a longitudinal section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door 2 Receiving main body 3 Shaft hole of receiving main body 4 Handle 5 Operating shaft part of handle 6 Fixed frame 7 Metal receiving part of fixed frame 8 Stopper plate 9 Receiving hole of operating shaft part 10 Inner wall of operating shaft part Through hole 11 Inner surface recess of seat body 12 Latch 13 Lock unit 14 Latch cam part 15 Joint member 16 Rotor of lock unit 17 Ring groove of joint member 18 O-ring 19 Rotor keyhole 20 Key

Claims (1)

(57) [Claims] An operating shaft portion of a handle is rotatably inserted into a shaft hole of a receiving body fixed to a door, and a latch engaging and disengaging from a metal receiving portion of a fixed frame body. The plate 8 is connected to the distal end of the operating shaft 5, and the operating shaft 5 is provided with a receiving hole 9 opened to the front side, and the inner wall through hole 10 of the receiving hole 9 is engaged with the inner concave portion 11 of the shaft hole 3. A latch 12 for locking the operating shaft 5 so that it cannot be rotated with respect to the receiving body 2 is accommodated in the distal end of the receiving hole 9, and a lock unit 13 is accommodated in the front end of the receiving hole 9, and the operating shaft 5 is A cam member 14 for driving the latch 12 out of the through-hole 10 through the inner wall is fixedly accommodated rotatably in a middle portion of the receiving hole 9, and a front end of the joint member 15 is connected to the lock unit 13. In the lock handle device for a door, which is operably connected to the rotor 16 of FIG.
An annular groove 17 is provided on the outer peripheral surface of the lock 5, and an O-ring 18 that presses against the inner surface of the receiving hole 9 of the operation shaft portion 5 is fitted into the annular groove 17.