JPH0538240U - Locking device for doors, etc. - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] The present invention relates to a device for locking the door of an inspection box such as communication equipment, power supply equipment, and water distribution piping equipment in a building. [Structure] A screw shaft portion 2 provided with a notch is rotatably incorporated in an outer cylinder portion 3 in which a rotation stop pin 4 is slidably incorporated, and the rotation stopper pin is engaged with the notch of the screw shaft portion to form a screw shaft. Part that can be operated only in the screwing direction, and the rotation stop pin can be magnetically disengaged from the notch to release the lock in the screw return direction. A lock opening and closing metal fitting for a lock screw body, in which a rotatable shaft 8 that enables the rotation shaft 8 is mounted in the cap 7, and the rotation stop pin in the outer cylinder portion can be removed from the notch by cutting in the cap.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for locking the door of an inspection box such as communication equipment, power equipment, and water distribution piping equipment in a building.

[0002]

[Prior Art]

 Conventionally, this type of inspection box is covered with a metal plate door, which is fastened and fixed to the box body with a Phillips screw and hexagon socket bolt, and is usually in a closed state, for example, once a month for regular inspection. It was opened by a staff member to inspect or repair the inside so that safety was always maintained.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional fixing method, anyone can easily loosen the plus screw, hexagon socket head bolt, etc. with a single screwdriver and open the door, causing mischief or disassembly, which causes a failure or accident. It could be a friend. As a means for preventing this, if the door is welded or a complicated lock is attached, the above-mentioned periodic inspection cannot be easily performed. In view of the above-mentioned various problems, the present invention has been made in order to solve the problems. The conventional screw hole can be used as it is, and only a special person such as a staff member can open and close the door. There is a need to obtain a simple and inexpensive locking device that can prevent the door from being opened and closed easily and can be prevented from being tampered with or disassembled.

[0004]

[Means for Solving the Problems]

 As a means for achieving this, the present invention rotatably incorporates a threaded shaft portion having a notch into an outer cylinder portion in which a rotation stopper pin is slidably incorporated, and the rotation stopper pin is engaged in the notch of the screw shaft portion. Together, the screw shaft can be operated only in the screw-in direction, and the lock pin can be magnetically disengaged from the notch to release the lock in the screw return direction. Install a lock device such as a door that locks the door to the inspection box with the body, and a rotation shaft that engages with the screw shaft portion of the lock screw body and is rotatable, in the cap. A lock screw opening / closing fitting for a lock screw body, wherein a magnet body is mounted in the cap, and the rotation stop pin provided on the outer cylinder of the lock screw body can be removed from the notch by the magnet body.

[0005]

【Example】

 A specific configuration of the present invention will be described in detail below with reference to an embodiment shown in the drawings. The lock screw body 1 is composed of a screw shaft portion 2 made of a non-magnetic material, an outer cylinder portion 3 and a rotation stop pin 4 made of a magnetic material. The head portion 21 of the screw shaft portion 2 has a flange 23 on the outer end side, the outer end surface 22 is provided with a triangular recess 23 for rotating operation, and the peripheral surface portion of the head portion 21 has the flange 23. A notch 24 having a step portion 25 is formed so as to be inclined in the direction of loosening (screw return direction), and a ring groove 26 is bored on the inner end side. Further, a ring groove 28 is bored on the base end side of the screw portion 27, and a screw 29 is engraved on the tip end side thereof. The outer cylindrical portion 3 is formed in a cylindrical shape, and the screw shaft portion 2 is inserted into the inner hole 31 of the outer cylindrical portion 3 to engage the flange 23 of the screw shaft portion 2 with the large diameter portion 32 on the outer end side. The snap ring 51 is elastically attached to the ring groove 26 of the screw shaft portion 2 exposed in the annular groove 33 on the inner end surface, and the screw shaft portion 2 is rotatably mounted in the outer cylinder portion 3. Further, a blind hole 34 is bored through the rotary sliding contact surface between the inner hole 31 of the outer cylinder 3 and the screw shaft portion 2 and in the cutting line direction, and the rotation stop pin 4 is slidable in the blind hole 34. The screw shaft portion 2 exposed in the blind hole 34 is engaged with and disengaged from the rotation stop pin 4, and the outer cylindrical portion 3 has an outer peripheral surface for positioning the blind hole 34. The engaging pin 35 is provided so as to project. Then, the lock screw body 1 in which the screw shaft portion 2 is incorporated into the outer cylinder portion 3 is fitted into the mounting hole B of the door A, and the door fixing pin 36 protruding from the back surface side of the outer cylinder portion 3 is attached to the door A. Of the snap ring 52 is fitted into the ring groove 28 of the screw shaft portion 2 protruding from the mounting hole B of the door A, while being fitted into a pin hole (not shown) formed in the vicinity of the mounting hole B of the same. Install the lock screw body 1 to the door A. The lock opening / closing fitting 6 includes a cap 7, a rotating shaft, and a magnet body. The cap 7 has a bottomed cylindrical shape, and the skirt portion 71 is formed with a cut groove 72 into which the engagement pin 35 of the lock screw body 1 can be engaged, and the rotation shaft 8 is rotated at the center of the bottom portion 73. In addition to being freely mounted, a recess 74 is provided in the inner surface of the bottom portion 73, and the magnet body 9 is fitted and fixed thereto, and the surface thereof is covered with the sheet 75. The rotary shaft 8 engages with a concave portion 23 for rotation operation formed on the head portion 21 of the screw shaft portion 2 of the lock screw body 1 on the tip surface facing the inner surface of the bottom portion 73 of the cap 7. A convex portion 81 having a shape is formed, and a knob 82 is provided at the rear end. In addition, 10 is a ring for connecting the holder, C is an inspection box, and a screw hole D for attaching the lock screw body 1 is screwed.

With this structure, the door fixing pin 36 protruding from the outer cylinder portion 3 of the lock screw body 1 is fitted into the pin hole of the door A, and the mounting hole B of the door A is screwed. The lock screw body 1 is attached to the door A by inserting the shaft portion 2 and elastically mounting the snap ring 52 in the ring groove 28, and then mounting the lock screw body 1 in the screw hole D of the inspection box C. Of the lock screw body 1 and the cap 7 of the lock opening / closing fitting 6 are fitted to the outer shaft portion 3 of the lock screw body 1. At that time, when the cut groove 72 of the cap 7 is engaged with the engagement pin 35 of the outer cylinder portion 3, the cap 7 and the outer cylinder portion 3 are integrally fixed in the rotational direction. At the same time, when the rotary shaft 8 is slightly rotated to the left and right, the convex portion 81 fits into the concave portion 23 of the screw shaft portion 2 of the lock screw body 1, and the rotary shaft 8 and the screw shaft portion 2 are integrated. Link. In this state, the magnet body 9 in the cap 7 attracts the rotation stop pin 4 in the outer cylindrical body 3 upward as shown by the chain line in FIG. 5 and engages with the notch 24 in the screw shaft portion 2. To release. Therefore, when the knob 82 of the lock opening / closing fitting 6 is rotated in the screwing direction (indicated by the solid line arrow in FIG. 5), the notch 24 of the screw shaft portion 2 can freely rotate without being blocked by the rotation stopping pin 4, The tip screw 29 of the shaft portion 2 is screwed into the screw hole D. Therefore, the opening of the inspection box C can be surely closed by the lock screw 1 of the door A. Further, when removing the door A from the inspection box C, the knob 82 of the lock opening / closing fitting 6 is rotated in the screw return direction (the arrow indicated by a chain line in FIG. 5) in the opposite manner to the above, and the magnet body 9 causes the rotation stopper pin 4 to be cut. Since it slides out of the rotation locus, the screw shaft portion 2 can be easily unscrewed, and the door A can be removed from the inspection box C. However, if the lock screw body 1 is screwed in by the lock opening / closing fitting 6 and the door A is fixed to the inspection box C and then the lock opening / closing fitting 6 is detached from the lock screw body 1, the rotation stop pin 4 in the lock screw body 1 is released. Moves to the bottom because the magnetic body 9 loses its attractive force, and falls within the rotation locus of the notch 24 as shown by the solid line in FIG. In this state, when the driver or the like is engaged with the recess 23 of the screw shaft portion 2 and rotated in the screw return direction (the chain line arrow in FIG. 5), the notch 24 is rotated into the stepped portion 25 as shown in FIG. 5 (a). When the stop pin 4 is placed, it slightly rotates as shown in FIG. 5 (b), but even if the stop pin 4 is further rotated, the notch 24 abuts against the stop pin 4 as shown in FIG. In order to prevent the rotation, the screw shaft portion 2 is locked, the lock screw body 1 cannot be disengaged from the inspection box C, the door A is held in a closed state, and the inspection box C is opened by someone else. It can be reliably prevented from being tampered with. However, when the screw shaft portion 2 is rotated in the screwing direction by a screwdriver or the like, the rotation stop pin 4 is moved by the step portion 25 of the notch 24 as shown in FIGS. 5 (c) to (b) and (b) to (a). Since it is pushed upwards, the screw shaft 2 can be freely rotated and screwed.

The recess 23 provided in the head portion 21 of the screw shaft portion 2 is not limited to the triangular shape of this embodiment, but may be a cross groove, a plurality of small holes, or the like.

As described above in detail with respect to the various embodiments, according to the present invention, since the rotation stop pin is incorporated in the notch formed in the screw shaft portion of the lock screw body in the engaged state, the lock opening / closing fitting is provided. Even if someone other than a specific person such as a staff member tries to remove the lock screw body with a screwdriver, etc., the rotation stop pin engages with the notch of the screw shaft and it is locked so that the door is never opened. It is possible to reliably prevent mischief. On the other hand, if the lock opening / closing fitting is connected to the lock screw body, the rotation stop pin is detached from the cut by the magnet body, the lock is surely released and the door can be freely opened, and the inspection box etc. are inspected and repaired. It has various effects that are inexpensive and excellent in usability.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of the present invention.

FIG. 2 is a vertical sectional view showing the upper half of the screw shaft portion 2 of the present invention in a side view.

FIG. 3 is a front view of the lock screw body 1 and the lock opening / closing fitting 6 of the present invention, viewed from the fitting surface direction to each other.

FIG. 4 is an exploded perspective view of the lock screw body 1 of the present invention seen from the back side.

FIG. 5 is a vertical sectional front view showing an operating state of the lock screw body 1 of the present invention.

[Explanation of symbols]

 1 Lock Screw Body 2 Screw Shaft Part 3 Outer Cylinder Part 4 Rotation Stop Pin 6 Lock Opening / Closing Metal Fitting 7 Cap 8 Rotating Shaft 9 Magnet Body 23 Recess 24 Cut Notch 29 Screw 34 Blind Hole 35 Engaging Pin 72 Notch Groove 81 Convex 82 Pick

Claims (2)

[Scope of utility model registration request] 1. A screw shaft portion provided with a notch is rotatably incorporated in an outer cylinder portion in which a rotation stop pin is slidably incorporated, and the rotation stopper pin is engaged with the notch of the screw shaft portion to form a screw shaft portion. To operate only in the screwing direction and magnetically disengage the anti-rotation pin from the notch to release the lock in the screw return direction. Locking device for doors, etc., which is installed in a locked state. 2. A rotating shaft, which is engaged and coupled with a screw shaft portion of a lock screw body to be rotatable, is mounted in a cap, a magnet body is mounted in the cap, and the magnet body is mounted outside the lock screw body. 2. A lock opening / closing fitting for a lock screw body of a lock device for a door or the like according to claim 1, wherein a rotation stop pin provided on the cylindrical portion is configured to be detachable from the notch.