JPH0516825Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention consists of floor outlets, floor plates,
The present invention relates to a structure for preventing loosening of a floor wiring device such as a telephone rotary tensioner when the floor wiring device is installed on a floor covered with a cushioned rug such as a carpet.

(Prior art) Conventionally, for example, a floor plate installed on the upper floor panel of a double-layered floor has an upper flange protruding from the upper end of a cylindrical case with a male screw on the outer circumferential surface. To bury it in a floor panel, insert the cylindrical case into the hole drilled in the carpeted floor panel, touch the upper flange to the carpet surface, and then insert a nut into the male thread of the case from the bottom of the floor panel. A means is adopted for screwing together and fastening it to the floor panel between the upper flange and the nut.

(Problem to be solved by the invention) However, with conventional fastening means, the entire floor plate is fixed in place due to the elastic restoring force of the carpet when it is first fastened, but as time passes, the upper part of the carpet The part fastened by the flange gradually loses its elastic restoring force, and eventually the fastened part deforms plastically into a concave state.As a result, the fastening of the entire floor plate becomes loose, causing it to shift vertically or rotate. This often caused various electrical problems.

The purpose of this project is to maintain the tightness of floor wiring devices buried in floors covered with carpets, etc., for a long period of time.

(Means for Solving the Problems) As a means for solving the above problems, the loosening prevention structure of the present invention is such that a floor wiring device having an upper flange is buried in a floor covered with a cushioned rug, and the upper flange is attached to a cushioned rug. In the configuration where the rug is fastened to the upper surface of the rug, there is a base plate that is in contact with the rug between the upper flange portion and the rug, and a base plate that is located between the base plate and the upper flange portion and springs both in opposite directions. The base plate is a flat annular plate with a plurality of triangular claws raised from the lower surface, and the base plate bites the claws into the rug to prevent rotation, and the base plate is a cushionable rug. A flat washer receiving surface is formed when placed on the base plate, and the elastic washer is held between the flat surface of the base plate and the upper flange. Hereinafter, an example in which the present invention is applied to a floor plate buried in a floor with a double structure will be described with reference to the drawings.

(Example) In FIG. 1, a male screw 2 is provided on the outer peripheral surface of a cylindrical case 1 whose upper end is closed and whose lower end is open. A cap 4 is screwed to the closed upper end surface of the case 1 so as to be openable and closable, and the case 1 is inserted into a hole 7 made in an upper floor panel 5 covered with a carpet 6 of a double structure floor, and the upper flange 3 is inserted facing upward, and at this time, an annular base plate 8 in contact with the carpet 6 and an annular elastic washer 9 located thereon are interposed between the upper flange 3 and the carpet 6, and then a floor panel is inserted. A nut 10 is screwed onto the male screw 2 of the case 1 via a washer 11, and is fastened to the carpet floor panel 5 between the nut 10 and the upper flange 3.

As shown in Figures 3 and 3a, the annular base plate 8 is a flat annular plate made of metal, synthetic resin, etc., and has an outer diameter approximately equal to the outer diameter of the upper flange 3 and an inner diameter of the case. The outer diameter of the base plate is slightly larger than that of the base plate 1, and triangular claws 12 (four in the figure) are set up on one side of the base plate at equal intervals. It is fixed to the top surface of the tongue 6.

The elastic washer 9 is an annular plate made of a corrugated steel plate as shown in FIGS. 2 and 2a, and has the same diameter as the base plate 8.

When the floor plate is fastened to the floor panel 5 as described above, and the upper flange 3 is fastened by sandwiching the base plate 8 and the elastic washer 9 and recessing the carpet 6, as shown in the first figure. First, the base plate 8 bites its claws 12 into the six surfaces of the carpet to prevent rotation and becomes a stable flat elastic washer receiving surface when it rests on the cushioned mat. The elastic washer 9, which is held between the flat receiving surface of the base plate 8 and the upper flange 3, constantly pushes the upper flange 3 upward, and cooperates with the elastic restoring force of the carpet 6 to tighten the floor plate. If the upper flange 3 of the carpet 6 becomes depressed and plastically deforms over time,
The resilient force continues to spring the upper flange 3 upward, thereby maintaining the fastening of the floor plate.

In addition to the above examples, the elastic washers used in the present invention include those having substantially the same structure as ordinary spring washers, and those having various other structures.

(Effect of the invention) According to the loosening prevention structure of the floor wiring device of the present invention, since the base plate rests on the cushioned rug with its claws as legs, the cushioned rug in that part cannot be strongly crushed. The upper flange can be maintained without loosening for a long time. Since the resilient washer is sandwiched between the flat surface of the base plate and the upper flange, the upper flange can continue to spring back to maintain the floor wiring fixture securely attached to the floor.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a longitudinal sectional view of the floor plate buried in the floor, Fig. 2 is a plan view of the elastic washer, Fig. 2a is a front view of the same, and Fig. 3 is a diagram of the base plate. The plan view and FIG. 3a are front views of the same. 3... Upper flange, 5... Upper floor panel, 6
...Jiyutan, 8...Base plate, 9...Elastic washers, 12...Claws.

Claims (1)

[Scope of Claim for Utility Model Registration] In a structure in which a floor wiring device having an upper flange portion is buried in a floor covered with a cushioned rug, and the upper flange portion is fastened to the upper surface of the cushioned rug, the above-mentioned upper flange A base plate that is in contact with the rug and an elastic washer that is located between the base plate and the upper flange and springs them in opposite directions are interposed between the base plate and the rug, and the base plate is flat. An annular plate with a plurality of triangular claws raised on the lower surface, and the base plate bites the claws into the rug to prevent rotation and forms a flat washer receiving surface when resting on the cushioned rug. and a locking structure for a floor wiring device, wherein the elastic washer is sandwiched between the flat surface of the base plate and the upper flange.