JPH08189243A - Locking device of door - Google Patents

Abstract

PURPOSE: To reduce the number of parts, to simplify assembling, and to exhibit the function equal to that of the conventional device. CONSTITUTION: The back of a handle main body 1 is integrally provided with a projecting part 5 having a stopper part 7 projected in the radial direction at a part of a disc, and with a non-circular part 6 projected further to the back side over the projecting part 5. A handle main body 1 is fitted in a through hole 8 with a rotation regulating groove 9 formed on a door 2, and a non- circular hole 10 of a locking plate 3 is fitted to the non-circular part 6 and fixed by a set screw 4. If the handle main body 1 is rotated, the locking plate 3 is rotated in a body to lock the door 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door locking device for a box for storing electric equipment.

[0002]

2. Description of the Related Art Conventionally, as a locking device for a door of a box for storing electrical equipment such as a switchboard or a switchboard, a device having a structure as shown in FIG. 3 has been used. To use this locking device, first, the screw 32 on the back surface of the main body 31 is fitted into the through hole (not shown) of the door and the main body 31 is fixed to the door by the nut 33. Inside this body 32 is a rotary shaft with a non-circular portion 34
35 is provided and can be rotated by a separate handle 36. And the non-circular portion 34 of this rotating shaft 35
The non-circular hole 38 of the locking plate 37 is fitted to the back side of the plate and fixed by the nut 39. Incidentally, a protrusion 40 is provided on a part of the locking plate 37, and by engaging the protrusion 40 with a rotation regulating groove 41 formed on the back surface of the main body 32 over about 90 degrees,
The rotation angles of the rotary shaft 35 and the lock plate 37 are regulated. The details of the locking device of FIG. 3 are described in Japanese Utility Model Publication 58-23890.
No., published in Japanese Unexamined Patent Publication No.

However, such a conventional door locking device includes a main body 31, a rotary shaft 35, a handle 36, a nut 33, and a locking plate.
Since it was composed of many parts such as 37 and nut 39, there was a problem that the manufacturing cost was high and the assembly was troublesome.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, has a small number of parts, is easy to assemble, and is capable of exhibiting a function equivalent to that of a conventional product. Has been completed in order to provide.

[0005]

SUMMARY OF THE INVENTION The present invention, which has been made to solve the above-mentioned problems, has a protrusion provided on a back surface of a handle, which has a stopper portion protruding in a radial direction on a part of a disk, and the protrusion. A non-circular portion that projects further to the back side than the portion is integrally provided, and this projection is fitted into a through hole with a rotation-regulating groove formed in the door. It is characterized in that the non-circular holes are fitted and fixed by a set screw.

[0006]

Since the door locking device of the present invention comprises only three parts, the handle body, the locking plate, and the set screw, the number of parts is halved compared to the conventional product, and the manufacturing cost is reduced. And the assembly can be facilitated. Moreover, the rotation angle of the locking plate can be regulated as in the conventional case by utilizing the through hole with the rotation regulation groove formed in the door, which is functionally inferior to the conventional product.

[0007]

The present invention will be described in more detail below with reference to the embodiments shown in FIGS. In the embodiment of FIG. 1, 1
Is a handle body, 2 is a door, 3 is a locking plate, and 4 is a set screw. The handle body 1 is called an arrow-shaped handle in the industry, and has a protrusion 5 on its back surface and the protrusion 5
Further, the non-circular portion 6 protruding further to the back surface side is integrally provided. In this embodiment, the handle body 1 is an integrally cast product.

As shown in FIG. 1, the projecting portion 5 is provided with a stopper portion 7 projecting in a radial direction on a part of a disk. The door 2 is provided with a through hole 8 slightly larger than the diameter of the disc of the protruding portion 5. In addition, a rotation restricting groove 9 that allows the stopper portion 7 to rotate about 90 degrees is formed in a part of the through hole 8. Then, when the handle body 1 is fitted into the through hole 8 from the front surface of the door 2, the stopper portion 7 of the handle body 1 is just fitted into the rotation restricting groove 9 of the door 2 and the handle body 1 can be rotated by about 90 degrees. You can do it.

The locking plate 3 is a non-circular portion 6 of the handle body 1.
Is provided with a non-circular hole 10 corresponding to. Then, as shown in FIG. 2, the locking plate 3 is fitted to the non-circular portion 6 of the handle body 1,
If fixed with the set screw 4, the handle body 1 will be the door 2
And the locking plate 3 is also fixed to the handle body 1. An O-ring 11 is fitted inside the annular groove on the back surface of the handle body 1. This O-ring
11 prevents rattling between the door 2 and the handle body 1, and prevents the handle body 1 from rotating inadvertently.
Further, it has a role of preventing water from entering the inside through the through hole 8. In addition, as shown in FIG.
Engages with the locking body 12 provided inside the box when rotated to the horizontal position, and prevents the door 2 from opening.

The door locking device of the embodiment thus constructed has a small number of parts, so that the manufacturing cost is low, and the handle body 1 is fitted into the through hole 8 of the door 2 and the locking plate 4 is locked by the locking screw 4. Assembling work is extremely simple because it is only necessary to attach 3. Moreover, like the conventional product, the locking plate 3
The rotation angle can be regulated, and the door 2 can be locked securely.

[0011]

As described above, the door locking device of the present invention has a small number of parts, is easy to assemble, and has the same function as the conventional product. It is highly valuable as a locking device that solves the above problem.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a door locking device of the present invention.

FIG. 2 is a horizontal sectional view of FIG.

FIG. 3 is an exploded perspective view showing a conventional example.

[Explanation of symbols]

 1 Handle Main Body 2 Door 3 Lock Plate 4 Set Screw 5 Projection Part 6 Non-Circular Part 7 Stopper Part 8 Through Hole 9 Rotation Restriction Groove 10 Non-Circular Hole 11 O-Ring 12 Locking Body

Claims (1)

[Claims] 1. A handle body is integrally provided on a back surface thereof with a projection portion provided with a stopper portion projecting in a radial direction on a part of a disc and a non-circular portion further projecting to the back surface side than the projection portion. At the same time, the protrusion is fitted into a through hole with a rotation-regulating groove formed in the door, and the non-circular hole of the locking plate is fitted into the non-circular part and fixed by a set screw. Door locking device.