JPH0421967Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a floor inspection port that is attached to the floor of a building and used as an entrance to the underfloor area when inspecting underground piping and wiring. In particular, the present invention relates to a floor inspection door equipped with a locking device that restricts opening and closing of the inner lid.

[Prior art]

Conventionally, this type of floor inspection port with a locking device was
JP-A No. 56-139352 discloses a locking device in which a locking piece is rotatably provided on a floor cover provided on the inner frame side of an inner and outer frame body framed in a rectangular shape. Attachment: A keyed handle is detachably and rotatably inserted into this locking device, and the rotation of this keyed handle rotates the latch piece of the locking device, thereby removing this latch piece. A device is described in which the lock is locked by being hooked to a hook receiver formed on the frame, and the lock is unlocked by detaching from the hook receiver. Fig. 9 shows an example in which the locking device of this configuration is installed near two opposing sides of the inner frame, and Fig. 9 shows an example in which the locking device with this configuration is installed in the center of the inner frame. Are listed.

However, in such a floor inspection port with a locking device, if the locking device is installed near two opposing sides of the inner frame, both sides must be locked when opening and closing the floor inspection port. In addition to having to operate the key to lock and unlock the locking device, there is the problem of poor operability when opening and closing the floor inspection door. If either of them fails, the floor inspection port cannot be opened or closed, which increases the number of causes of failure, making it more likely to occur.
In addition, if the locking device is installed in the center of the inner frame, a pair of rods with a length exceeding 1/2 of the length of one side of the floor inspection opening is required as a hook. Moreover, since the rotational movement of the keyed handle is converted into the sliding movement of these pair of rods via the crank, these rods may be accidentally deformed when the floor cover is opened, causing malfunction of the locking device. It had become a serious cause.

Moreover, in the locking device described in JP-A-56-139352, the latch piece is exposed on the underside of the floor cover, and the latch piece can be rotated from under the floor. There is also the problem that it is not possible to completely prevent intrusion from under the floor, and if the building is designed to allow access from outside to the floor, this floor inspection hole may be pried open from under the floor and used as a means of entering indoors. There is a possibility that

[Purpose of invention]

This invention was devised in view of this point of view, and its purpose is to securely lock the floor inspection door so that it cannot be pried open when it is not necessary, and to have a simple structure that prevents failure. To provide a floor inspection port with a locking device which has a small amount of damage and can be easily opened and closed with a single key operation when necessary.

[Structure of the idea]

That is, the present invention consists of an outer frame that is fixed to the opening edge of a floor opening opened in the floor surface, and an inner lid that is removably fitted into the outer frame to open and close the floor opening. In a floor inspection door equipped with a locking means for regulating opening and closing of the inner cover, one side wall of the inner frame forming the inner cover has a locking pin that engages and disengages from a locking receptacle on the opposing side wall of the outer frame. At the same time, a locking pin protrudes from the side wall of the inner frame located on the opposite side to the side wall where the locking pin is provided, and a locking pin moves in and out with a predetermined stroke by key operation to lock the opposite side wall of the outer frame. This is a floor inspection port with a locking device in which a locking device that engages and disengages is attached to the receiving part, and the side wall of the outer frame body and the side wall of the inner frame body are locked by these locking pins and the locking pins of the locking device.

In the present invention, the lock device used is one that cannot be operated without a key, such as a cylinder lock, for example.

Therefore, in the floor inspection port with a locking device of the present invention, by locking the locking device using a key, the side wall of the inner frame body and the side wall of the outer frame body constituting the inner lid are located on substantially opposite sides of each other. The floor inspection door cannot be opened unless a key is used.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The floor inspection port with a locking device of the present invention will be explained in detail below based on the embodiments shown in the accompanying drawings.

1 to 4, a floor inspection port A with a locking device according to an embodiment of the present invention is shown.
In this embodiment, the floor inspection opening A is removably fitted into an outer frame body 4 fixed to an opening edge 3 of a floor opening 2 opened in a floor surface 1. The inner cover 5 is configured with an inner cover 5 that opens and closes the floor opening 2, and the inner cover 5 is connected to the outer frame 4 at at least two locations on the periphery of the inner cover 5 at positions substantially opposite to each other. A locking means 6 is installed to stop the locking.

In this embodiment, the inner lid 5 has an inner frame body 7 formed by framing four inner frame pieces 8 into a rectangular shape.
, a bottom plate 9 attached to the lower part of the inner frame 7 , a mortar 10 filled on the bottom plate 9 inside the inner frame 7 , and a mortar 10 installed on the mortar 10 and placed on the upper end surface of the inner frame 7 . , the upper end surface of the outer frame body 4 and the floor material 11 forming substantially the same plane as the surrounding floor surface 1, and the inner cover 5 has an inner cover 5 along its approximate center line. A pair of handles 12 are provided for opening and closing.

The locking means 6 is a locking device consisting of a bracket 13 having a substantially L-shaped cross section fixed to one inner frame piece 8 of the inner frame body 7 with means such as screws, and a cylinder lock fixed to this bracket 13. 14 and
A locking pin 15 is attached to the inner frame piece 8 facing oppositely to the inner frame piece 8 to which this locking device 14 is fixed.
It is made up of.

The bracket 13 is attached so that one wing piece 13a is fixed to the inner frame piece 8, and the other wing piece 13b forms approximately the same plane as the floor material 11 of the inner cover 5, and also has a lock. The device 14 is fixed to one of the blades 13a by screws or the like so as to be located within the angle formed by the pair of blades 13a and 13b, and its keyhole 16 is fixed to the other blade 13b of the bracket 13. It is exposed to the outside through the formed through hole 17. Further, the through hole 17 has a convex line 18 formed along its inner circumferential surface, and a cap 20 made of soft synthetic resin, rubber, or other suitable material having a concave line 19 on the outer circumferential surface is inserted through the hole 17. Fits into the hole 17 and the concave line 1
By fitting 9 into the protruding strip 18, the keyhole 16 of the locking device 14 can be covered and protected. A pair of inclined grooves 21 formed on the peripheral wing pieces 13b of the through hole 17 are grooves into which a screwdriver or the like is inserted when removing the cap 20 from the inside of the through hole 17.

The lock device 14 has a lock pin 22 that appears and retracts in a constant stroke when the key is operated.
The locking pin 22 slidably passes through the wing piece 13a of the bracket 13 and the inner frame piece 8 of the inner frame body 7, and locks into a locking receiving portion 23a formed on the outer frame body 4. The locking pin 15 of the locking means 6 is attached to the inner frame piece 8 facing opposite to the inner frame piece 8 to which the locking device 14 is attached. It protrudes outward and is adapted to be removably locked in a locking receiving portion 23b formed on the outer frame body 4. In addition, each of the locking receivers 23a and 23b formed on the outer frame 4 is provided with a receiver cover 2 from the outside.
4 is attached, thereby protecting each of the locking receivers 23a, 23b when the outer frame 4 is attached to the opening edge 3 of the floor opening 2.

Therefore, the floor inspection port A with the locking device of this embodiment
According to , when opening the inner cover 5 to open the floor opening 2, first remove the cap 20 from the through hole 17 using a screwdriver or the like, insert the key into the keyhole 16 of the locking device 14, and rotate it. , thereby unlocking the locking pin 22 of the locking device 14 from the locking receiver 23a of the outer frame 4, and holding the handle 12 of the inner lid 5, the locking pin 15 is inserted into the locking receiver of the outer frame 4. The inner cover 5 is removed from the outer frame body 4 by pulling it out from 23b. On the other hand, when the inner cover 5 is fitted into the outer frame 4 to close the floor opening 2, the locking pin 15 is
The inner lid 5 is fitted into the outer frame 4 so that it is locked to the locking receiver 23b of the outer frame 4, and then the key is inserted into the keyhole 16 of the lock device 14 and rotated to lock the lock pin. 22 is the locking receiving part 23a of the outer frame body 4
The through hole 17 of the bracket 13
Insert the cap 20 into the locking device 14.
The keyhole 16 of the keyhole 16 may be covered and protected.

In FIG. 3, reference numeral 25 is a mounting base for the handle 12, and reference numeral 26 is a reinforcing member attached to the bottom plate 9.

[Effects of the Invention] The floor inspection port with a locking device of the present invention has the above-mentioned configuration, and therefore has the following effects.

A locking pin is provided protrudingly on one side wall of the inner frame body, and is engaged with and disengaged from a locking receptacle on the opposing side wall of the outer frame body, and the locking pin is locked on the side wall at a position opposite to the side wall where the locking pin is provided. Once the device is installed, the locking pin of the locking device can be engaged and disengaged from the locking receptacle on the side wall of the outer frame by operating the key.
Easy to open and close with just one keystroke, offering excellent operability.

Since the locking pin and the locking device are directly attached to the side wall of the inner frame constituting the inner lid, there is no risk of deformation of the locking pin or the locking pin of the locking device, and there is extremely little chance of failure.

An outer frame body in which a locking pin and a locking device are directly attached to a side wall of an inner frame body constituting the inner cover, and are firmly fixed to an opening edge of a floor opening at a position close to the side wall of the inner frame body. Since it is locked to the side wall of the outer frame, the length of the locking pin or locking pin can be minimized, thereby improving the locking strength and ensuring locking to the outer frame.

The locking pin and the locking pin of the locking device are not exposed on the underside of the inner cover of the floor inspection door, so even if the building is a building where it is possible to enter under the floor from outside, the locking device cannot be removed from the underside of the inner cover. Since it cannot be locked, it is impossible to open this floor inspection door and enter the house.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a floor inspection port with a locking device according to the first embodiment of the present invention, Fig. 2 is a side view of Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. This figure is a partial perspective view showing the state in which the locking device shown in FIG. 3 is installed. Explanation of symbols, A...Floor inspection port, 1...Floor surface, 2
... Floor opening, 3 ... Opening edge, 4 ... Outer frame body, 5
...Inner lid, 6...Lock means, 7...Inner frame body, 1
4... Locking device, 15... Locking pin, 22...
Lock pin.

Claims (1)

[Scope of utility model registration request] It consists of an outer frame body fixed to the opening edge of a floor opening opened in the floor surface, and an inner lid that is removably fitted into the outer frame body to open and close the floor opening. In the floor inspection port provided with a locking means for regulating, a locking pin is protrudingly provided on one side wall of the inner frame forming the inner cover to be engaged with and disengaged from a locking receptacle on the opposing side wall of the outer frame; On the side wall of the inner frame located on the opposite side to the side wall where this locking pin is provided, the locking pin moves in and out with a predetermined stroke by key operation, and engages and disengages from the locking receiver on the opposing sidewall of the outer frame. A floor inspection port with a locking device, characterized in that a locking device is attached, and a side wall of an outer frame body and a side wall of an inner frame body are locked by these locking pins and the locking pins of the locking device.