JPS594140B2 - Opening/closing device for floor metal fittings for supporting pillars in gymnasiums, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an opening/closing device for floor metal fittings for holding columns in gymnasiums, etc., on which nets are stretched when playing volleyball, tennis, badminton, etc. This invention relates to an opening/closing device for a floor metal fitting that allows the upper part of a column-fitting pipe buried in a foundation under the floor to be in a used or unused state.

BACKGROUND ART Conventionally, as this type of floor metal fitting, there have been used one in which a cover plate is attached to the main body of the floor metal fitting with a hinge, and the other type in which a cover plate is fitted into the main body of the floor metal fitting.

However, in the former case, when the cover plate is opened, a recess may occur in the floor metal fitting body at the hinge part, or the cover plate may naturally fall on the floor when it is in an upright or fallen position. (Note: Dust naturally accumulates or adheres to the recesses and hinges, and if this accumulates many times and is left unattended, it may impede the opening/closing function.) There were other inconveniences such as the danger of the exposed lid plate.

) Also, it is necessary to form a recess in the floor metal body for the finger to open the lid, so the floor surface is not completely flush with the floor metal, whether in use or not. It was something I couldn't get.

Furthermore, in the latter case, when the floor is not in use (when the pillars are not fitted), the floor surface can be made flush, but since it is flush, when it is opened, Insertion hooks for metal wires, etc. require holes for use, and there are disadvantages such as dust entering and adhering to these holes, and cleaning liquid flowing into the column fitting tube through the holes during cleaning. It is something that was given.

The present invention was made by focusing on the diagonal point, and its purpose is to fit the perforated cover and the blind cover for the support column flush with the floor surface, and to raise them using electromagnetic force. To provide an opening/closing device for floor metal fittings for supporting pillars in gymnasiums, etc., which can be easily removed by hand.

Another object of the present invention is that the perforated cover and blind cover for pillars have no recessed portions, and in some cases eliminates the need for a floor metal fitting body that is fixed to the floorboard, and when this is used, Another object of the present invention is to provide an opening/closing device for floor metal fittings for supporting pillars in gymnasiums, etc., which does not produce recesses or protrusions like the previously mentioned known devices.

Still another object of the present invention is to enable a plurality of perforated supports and blind covers to be made removable by hand by remote control;
Therefore, it is an object of the present invention to provide a floor metal fitting for holding columns in a gymnasium, etc., which can save time and labor, and is free from failure, that is, has a long lifespan.

Next, an embodiment of the present invention capable of achieving the above object will be described in detail with reference to the accompanying drawings.

Reference numeral 1 indicates a floor plate, and 2 indicates a floor metal fitting body screwed to the floor plate 1. The floor metal fitting body 2 is made of a non-magnetic material (for example, brass, reinforced plastic, etc.), and has an annular recessed step portion 2a on the inner circumferential side.
is formed.

Reference numeral 3 indicates a perforated cover for the column having an annular flange 3a and a column insertion hole 3b, and 4 indicates a blind cover having an annular flange 4a, both of which are made of non-magnetic material.

5 is a cylindrical portion 3c at the lower part of the annular collar 3a of the perforated support cover 3.
An annular permanent magnet fixed to the outer periphery of the blind lid 4, and 6 indicates an annular permanent magnet fixed to the main body 4b at the lower part of the annular collar 4a of the blind lid 4. For example, use of , pinning from the outer circumferential side, etc.

) The bottom surfaces 5a and 6a of both the permanent magnets 5 and 6 are fixed so as to protrude slightly from the bottom surfaces of the cylindrical portion 3c and the main body portion 4b.

γ is a column fitting tube, 8 is a cylindrical body made of electromagnetic material, and 9 is an electromagnetic coil wound around the outer periphery of the tube 8. Other parts except the upper part of the column fitting tube γ are as follows. Like the conventional one, it is buried in the foundation, and the upper outer peripheral side cylindrical body 8 is fixed.

(For example, in the same way as the fixing means for the permanent magnets 5 and 6 described above) Also, even if the column fitting tube γ is made of a non-magnetic material,
It can be made of magnetic materials such as iron or any of the above, but
In the latter case, it goes without saying that it is necessary to fix the cylindrical body 8 through a material for blocking lines of magnetic force.

Furthermore, the upper surface 8a of the cylindrical body 8 is provided in a state that protrudes slightly from the upper surface of the column fitting tube 1, so that when the perforated column cover 3 and the blind cover 4 for the column are fitted to the floor metal fitting main body 2, The lower surfaces 5a, 6a of the permanent magnets 5, 6 provided on the upper surface 8a are configured to abut on the upper surface 8a.

Further, when the magnetic poles N and S of the permanent magnets 4 and 5 are magnetized as shown in the drawing, an S pole is generated at the upper part of the cylindrical body 8.

Note that 9a and 9b are lead wires, E is a power supply, and S is a switch.

In the diagonal configuration, in the state shown in Fig. 1, a net tensioning post for volleyball, tennis, badminton, etc. is fitted into the post fitting tube body 1 via the post hole cover 3, and after the game 1. Later, the switch S is turned on via the ONL electromagnetic coil 9 to generate a magnetic force such that the upper part of the cylindrical body 8 becomes the S pole.

In such a case, the lower part of the permanent magnet 5 of the perforated cover 3 for the column
In relation to the poles, the poles repel each other, so that the column perforation 3 can be pushed up, ie easily removed by hand.

(Note: When mating, of course turn switch S to
Set it to FF.

) Also, the blind cover 4 is fitted and removed in the same manner as described above.

Although one embodiment of the present invention has been described above, the present invention is not limited to this, and the design may be changed, for example, as follows.

(1) Instead of using the floor metal fitting main body 2, an opening having an annular recessed step is bored in the floor plate 1, and the post hole cover 3 and the blind cover 4 may be directly fitted into this part.

(The lower surfaces 5a and 6a of the two permanent magnets 5 and 6 and the upper surface 8a of the cylindrical body 8 may be flush with the cylindrical portion 3c and the main body portion 4b.

(3) S poles and N poles may be alternately generated in the upper part of the cylindrical body 8.

Accordingly, in the present invention, a cylindrical body made of electromagnetic material is fitted and fixed to the upper part of the outer periphery of a column fitting tube whose lower part is buried and fixed in the foundation, and an electromagnetic coil is attached to the outer periphery of this cylindrical body. At the same time, the lead wires are connected to the power supply and switch, and a perforated cover and a blind cover for the pillar are made to fit flush against the floorboard on top of these, and the above-mentioned Since the gist is an opening/closing device for floor fittings for supporting pillars in gymnasiums, etc., which consists of permanent magnets fixed to each other so as to repel magnetic force generated in a cylindrical body, the above-mentioned desired It can achieve its purpose and effects for a long time.

[Brief explanation of the drawing]

The drawings show an embodiment of the floor metal fitting for supporting columns in a gymnasium, etc. according to the present invention, and FIG. 1 is a longitudinal cross-sectional side view when a hole-cover for a column is used, and FIG. 2 is a longitudinal cross-section of the hole-cover for a column. Side view, FIG. 3 is a longitudinal sectional side view of the blind lid. 1... Floor board, 3... Perforated cover for pillar, 4... Blind cover,
5゜6...Permanent magnet, 7...Plumbing tube for fitting, 8.
... Cylindrical body, 9... Electromagnetic coil, 9 a t 9 b
...Lead wire, E...power supply, S...switch.

Claims (1)

[Claims] 1. A cylindrical body made of electromagnetic material is fitted and fixed to the upper part of the outer periphery of the column fitting tube whose lower part is buried and fixed in the foundation, and an electromagnetic coil is wrapped around the outer periphery of this circular body, and its leads are Connect the wires to the power source and switch, and make a hole cover and a blind cover for the pillars that fit flush against the floorboard on top of these, and make sure that the magnetic force is applied to the cylindrical body. An opening/closing device for floor metal fittings for supporting pillars in gymnasiums, etc., which is made by fixing permanent magnets so as to repel each other when a magnet is generated.