JPH0524771Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a lid locking device.

[Prior art] In order to close the upper end opening of a box or cylinder with a lid, the lid is fitted or screwed together, but it is difficult to close the upper end opening of a case or cylinder by fitting or screwing the lid. In some cases, it is necessary to lock the lid so that it cannot be opened without permission. Conventionally, a plug-in type key is used for such locking, and a key hole is provided in the lid and the key is inserted into the hole to unlock the door. It had been.

[Problems that the invention aims to solve] In the conventional key-insertion type lock as described above, the key hole is opened in the lid, so if you look at it, you can see that important parts or equipment are installed inside. In addition, if the locking mechanism is simple, there is a risk that the lock may be unlocked with a wire or the like even without a key, which poses a problem in terms of safety.

Therefore, the present invention provides a locking device that does not require a key hole.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the circular lid locking device of the present invention includes a cylindrical body 20 having an open top end, a locking lid 1 made of a non-magnetic material that is attached to the top opening. The locking lid 1 has a screw 5 carved into the outer peripheral surface of the ring wall 3 on the lower side of the circular lid plate 2 which has a key locking recess 4 on the periphery, and the bottom plate 6 of the ring wall 3 and the lid. A space 8 is provided between the plates 2, a magnetic movable disk 10 with an operating rod 11 protruding from the bottom surface is installed in the space 8, and the bottom plate 6
A movable locking piece 13 is pivotally supported on the lower surface of the movable locking piece 13, and the rear surface 15 of this movable locking piece 13 is pressed by the operating rod 11 to cause the locking piece tip 16 to protrude laterally. It is configured to be locked by being engaged with a protrusion on the inner circumferential surface of the cylindrical body 20.

[Function] The locking piece tip 16 of the movable locking piece 13 is held in a state of protruding laterally by the operating rod 11 of the magnetic movable disc 10 pressing the locking piece rear surface 15, and When the movable magnetic disc 10 is pulled upward by a magnet from outside the locking lid 1 and the holding of the movable locking piece 13 by the operating rod 11 is released, the tip 16 of the locking piece rotates downward. . This locking piece tip 16 locks by locking the protrusion on the circumferential surface of the cylindrical body when it is in a state of protruding in the lateral direction, and releases the lock when it is in a state of being rotated downward. be.

[Examples] Examples of the present invention will be described below with reference to the drawings. Fig. 1 shows a longitudinal section of one embodiment of the circular lid locking device of the present invention, Fig. 2 shows the top surface of the locking lid, Fig. 3 shows a part of it in longitudinal section, and Fig. 4 shows the top surface of the locking lid. 5 shows a vertical section of the cylindrical body, FIG. 6 shows a partial vertical section of the unlocking key lever, and FIG. 7 shows the bottom surface.

In the figure, reference numeral 1 denotes a circular locking lid made of a non-magnetic material such as brass, and 20 denotes a cylindrical body with an open top. This locking lid 1 covers the top opening of the cylindrical body 20 and locks it.

As shown in FIGS. 2 to 4, the locking lid 1 has an annular wall 3 on the lower surface of a circular lid plate 2, a recess 4 for locking a key on the periphery of the upper surface of the circular lid plate 2, and a ring wall 3 on the lower surface of the circular lid plate 2. A screw 5 is carved on the outer peripheral surface of the ring wall 3, and a bottom plate 6 made of a non-magnetic material is screwed into the inner periphery of the lower end of the ring wall 3 with a threaded portion 7.
A space 8 is formed between the bottom plate 6 and the bottom plate 6, and a hole 9 is provided in the center of the bottom plate 6.

Reference numeral 10 denotes a magnetic movable disc made of magnetic material, which has an operating rod 11 projecting from its lower surface, and this movable disc 10 is installed in the space 8 described above. To install this in the space 8, before screwing the bottom plate 6 to the ring wall 3, fit the movable disk 10 into the space 8 in advance, and insert the operating rod 11 into the center hole 9 of the bottom plate 6. Then, the bottom plate 6 is screwed onto the ring wall 3.

This magnetic movable disc 10 is normally located at the bottom of the cavity 8 as shown in the figure due to its own weight, but when a magnet is placed on the top surface of the circular cover plate 2, its magnetic force causes the cavity to become empty. 8 is sucked upward and pulled up, and at the same time, the operating rod 11 is also pulled up inside the center hole 9 of the bottom plate 6.

A supporting piece 12 is provided protrudingly from the lower surface of the bottom body 6, and a movable locking piece 13 made of a non-magnetic material is attached to the supporting piece 12 on the shaft 1.
4, so that the rear surface 15 of this movable locking piece 13 can come into contact with the side surface of the operating rod 11 of the magnetic movable disc 10 as shown in the figure. The locking piece tip 16 is configured to protrude laterally by contacting and pressing the rear surface 15 of the locking piece.

In order to configure the movable locking piece 13 in this way,
The tip 16 side is made heavier than the rear surface 15 side with respect to the pivot shaft 14 to make it eccentric, and when the operating rod 11 is in the position shown in the figure and is in contact with and holding down the rear surface 15 of the locking piece, it is locked. One tip 16 maintains a state of protruding laterally as shown in the figure, and when the operating rod 11 rises in the direction of the arrow, it separates from the rear face 15 of the locking piece, so the movable locking piece 13 becomes free. The tip 16 is configured to rotate downward in the direction of the arrow and hang down due to its own weight. In order to pull up the operating rod 11 in this way, a magnet is placed on the top surface of the circular cover plate 2, and the magnetic movable disk 10 is attracted and pulled up by magnetic force.

As shown in FIG. 5, the cylindrical body 20 is provided with a female threaded portion 21 on the inner peripheral surface of the upper end opening, a stepped protrusion 22 on the lower inner peripheral surface, and a locking piece stopper on the inner peripheral surface of the cylinder. A protrusion 23 is provided.

The locking lid 1 and the cylindrical body 20 are assembled by screwing the screw 5 on the outer circumferential surface of the ring wall 3 of the locking lid 1 into the female screw portion 21 on the inner circumferential surface of the upper end opening of the cylindrical body 20, as shown in the first diagram. The upper end opening of the cylindrical body 20 is covered with the locking lid 1. When the locking lid 1 is inserted into the cylindrical body 20 in this manner, if the locking piece tip 16 of the movable locking piece 13 protrudes laterally as shown in the figure, this locking piece tip 16 will not fit into the cylindrical body. 20 and cannot be inserted, so a magnet is applied to the top surface of the circular cover plate 2 of the locking lid 1, and the magnetic movable disc 10 is attracted upward by the magnetic attraction force, and the operating rod 11 is pulled upward. The retainer on the rear surface 15 of the locking piece is released and the tip 16 of the locking piece is rotated downward. By preventing the locking piece tip 16 from protruding laterally in this way, it becomes possible to fit the locking lid 1 into the upper end opening of the cylindrical body 20.

As described above, the magnet used to attract the magnetic movable disc 10 upward by applying it to the upper surface of the circular cover plate 2 of the locking lid 1 is a magnetic key lever 30 as shown in FIGS. 6 and 7. This magnetic key lever 30
In this example, a circular magnet 31 is held in a case 32, protrusions 33, 33 are protruded from the periphery of the lower surface of the case 32, and a lever 34 is provided. When the magnet 31 is fitted into the recesses 4, 4 on the top surface of the lid plate 2 and brought into contact with the top surface of the circular lid plate 2, the magnetic movable disk 10 is pulled upward in the space 8 by the attractive force of the magnet 31, and is pulled up along with the magnetic movable disk 10. The operating rod 11 is also pulled upward.

The locking lid 1 fitted into the upper opening of the cylindrical body 20 as described above is turned by turning the magnetic key lever 30, which has protrusions 33, 33 fitted into the recesses 4, 4 on the top surface of the circular lid plate. The lid is screwed onto the upper opening of the cylindrical body 20.

As described above, the locking lid 1 that covers the upper opening of the cylindrical body 20 is attached to the magnetic key lever 3 that is placed on the upper surface of the locking lid 1.
If 0 is removed, the magnetic attraction force of the magnetic movable disc 10 is eliminated, and the magnetic movable disc 10 falls downward in the space 8 due to its own weight and reaches the position shown in the figure. As this movable disc 10 falls, the operating rod 11
The movable locking piece 13 also falls downward, which pushes the locking piece rear surface 15 of the movable locking piece 13, so that the locking piece tip 16 moves again.
protrudes laterally and extends to the lower side of the stepped protrusion 22 on the inner peripheral surface of the cylindrical body 20, resulting in the state shown in the figure.

In this state in which the locking piece tip 16 protrudes laterally, even if the locking lid 1 is turned and removed in this state, it will be locked in the locking piece stopper protrusion 23 protruding from the inner peripheral surface of the cylindrical body 20. Since one tip 16 hits and prevents rotation, the locking lid 1 cannot be turned and removed. In this state, the locking lid 1 covering the upper opening of the cylindrical body 20 is locked so that it cannot be removed.

To unscrew the locking lid 1 locked to the cylindrical body 20 as described above, the protrusions 33, 33 of the magnetic key lever 30 are inserted into the recesses 4, 4 on the top surface of the circular lid plate 2 of the locking lid 1, as described above. When the magnet 31 is applied to the top surface of the circular cover plate 2, the magnetic movable disc 10 is attracted upward, the operating rod 11 is pulled up, and the retainer on the rear surface 15 of the locking piece is released, so that the tip 16 of the locking piece rotates downward. If the locking lid 1 is turned in this state, the locking piece tip 16 will no longer touch the locking piece stopper protrusion 23, and the lock screwed into the upper end opening of the cylindrical body 20 will eventually fall. It becomes possible to turn the lid 1 and remove it.

Note that even if the locking piece stopper protrusion 23 on the inner peripheral surface of the cylindrical body 20 is omitted as described above, the movable locking piece 13
The locking piece tip 16 protrudes laterally to lock the cylindrical body 20.
Since it extends to the lower side of the stepped protrusion 22 on the inner circumferential surface of the locking lid 1, it is impossible to remove the locking lid 1 by pulling it upward in this state. A locked state will be obtained so that it cannot be removed.

As described above, the locking lid 1 that covers the upper end opening of the cylindrical body 20 can be locked and unlocked so that it cannot be removed.

[Effects of the invention] As mentioned above, the present invention provides a locking lid attached to the upper end opening of the cylindrical body with a magnetic movable disk and a movable locking piece, and moves the magnetic movable disk with a magnetic key to engage the movable locking piece. Since it is locked by rotating it, safety can be ensured since there is no key hole in the lid unlike in the conventional case.Moreover, the locking lid has a recess for locking the key in the circular lid plate. Since the locking lid can be rotated by a magnetic key lever, it is impossible to remove the locking lid without permission, and a safe and secure locking device can be obtained.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of one embodiment of the present invention, Fig. 2 is a top view of the locking lid, Fig. 3 is a partial longitudinal sectional view thereof,
4 is a bottom view thereof, FIG. 5 is a vertical sectional view of the cylindrical body, FIG. 6 is a vertical sectional view of a portion of the unlocking key, and FIG. 7 is a bottom view thereof. 1... Locking lid, 2... Circular lid plate, 3... Ring wall,
4... Key locking recess, 5... Screw, 6... Bottom plate, 8... Blank space, 10... Magnetic movable disk, 11...
...Operating rod, 13...Movable locking piece, 15...Rear surface,
16... Tip of the locking piece.

Claims (1)

[Scope of utility model registration request] The locking lid 1 includes a locking lid 1 made of a non-magnetic material and a cylindrical body 20 with an open upper end.
A screw 5 is carved on the outer peripheral surface of the ring wall, a space 8 is provided between the bottom plate 6 of the ring wall and the circular cover plate, and the operating rod 11 on the lower surface of the magnetic movable disk 10 installed in the space is The rear surface 15 of the movable locking piece 13, which projects downward from the bottom plate 6 and is pivotally supported on the lower surface of the bottom plate, is pressed by the operating rod to cause the locking piece tip 16 to protrude laterally, and the locking piece tip is inserted into the cylindrical body. A circular lid locking device that locks onto a protrusion on the periphery.