JPH041580Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a sealing device for preventing electricity theft by sealing a screw stopper head with a lid fastened to a frame housing of an electric meter, etc. It is about improvement.

[Conventional technology]

Conventionally, this type of sealing tool was the
There is one described in Publication No. 43417. This idea is the 6th
As shown in the figure, a downward wedge part B formed on the outer periphery of the wedge inner cylinder A made of an elastic material, and an upward stepped part C that engages with the wedge part B on the inner periphery are provided, and the lower end part is made thinner. It consists of a bell-shaped mantle (2) formed on an inclined surface (E) that expands downward. Even if one tries to forcefully grip the outer periphery of the bell-shaped mantle and rotate and loosen the wedge inner tube and the screw plug for the purpose of power theft, etc., the sloped surface of the bell-shaped mantle and the wedge There is a space between the inner circumferential surfaces of the cylinder A, and since they are in line contact, a slip occurs and does not rotate.If you forcibly press the bell-shaped body N and rotate it, it will become bell-shaped. The lower end of the envelope was damaged so that the fact of power theft could be detected.

[Problem that the invention attempts to solve]

However, in this sealing device, since the tip of the bell-shaped sleeve 2 is thin and sharp, there is little engagement surface with the wedge inner tube 2, and the tightening is not strong and loosens, leading to power theft. I was afraid. Furthermore, even if the lower end of the bell-shaped mantle is damaged when the bell-shaped mantle is rotated, it cannot be easily confirmed because only the tip is visible and the detection of fraud is delayed.

This invention solves these problems,
By integrally forming a protective short cylinder on the outer circumferential surface of the bell-shaped case via a connecting piece, it is sturdy and has a strong fastening, and there is no risk of loosening. The purpose of the present invention is to provide a sealing device that prevents power theft unless it is destroyed.

[Means for solving problems]

In order to achieve the above object, the sealing device of the present invention has a plurality of longitudinal grooves 2 on the outer periphery of a bottomed cylindrical body 1 having a central hole 5, and has an inclined head as shown in the drawings corresponding to the embodiments. A bell-shaped mantle comprising a wedge inner cylinder A made of an elastic material having a downward wedge part 4 connected thereto, and an upward step part 7 that can engage with the wedge part 4 on the inner peripheral surface. In the sealing device which is adapted to fit the body B and the body B, one end portion of the plurality of connecting pieces 8 provided radially on the inner wall surface of the protective short cylinder body C integrally formed with the bell-shaped body B is bell-shaped. They are connected in the tangential direction of the outer circumferential surface of the mantle B.

[Effect]

When the bell-shaped mantle B, which is formed integrally with the protective short cylinder C via the easily damaged connecting piece 8, is placed over the wedge inner cylinder A and pressed, the inclined head 3 narrows the vertical groove 2 and moves inward. The stepped portion 7 of the bell-shaped mantle B passes through the wedge portion 4 of the wedge-inner tube A, and after passing through, the diameter of the inclined head 3 is restored and expanded, and the wedge portion 4 and the stepped portion 7 are engages to produce a non-returning effect and seal the screw head Sa. When the protective short cylinder C is rotated, the connecting piece 8 connected in the direction of the outer circumferential surface of the bell-shaped mantle B is easily broken, and the rotation is not transmitted to the bell-shaped mantle B, preventing tampering.

〔Example〕

To explain the drawings showing the embodiments of the present invention, the wedge inner cylinder A is made of an elastic material such as synthetic resin or rubber.
A plurality of longitudinal grooves 2 are provided at predetermined intervals on the outer circumferential surface of the bottomed cylindrical body 1, and an inclined head 3 and a downwardly directed wedge portion 4 connected thereto are formed, and a screw plug S is provided at the center of the bottom surface.
A center hole 5 is bored through which the hole is inserted. The bell-shaped mantle B made of synthetic resin such as acrylic resin has an upward step 7 on the inner peripheral surface of the cylindrical body 6 that can engage with the wedge part 4.
has been formed. 8 is a bell-shaped mantle B, a protective short cylinder C
A plurality of connecting pieces are connected integrally to each other, and one end is radially arranged from the inner wall surface of the protective short cylindrical body C to the tangential direction of the outer peripheral surface of the cylindrical body 6 at regular intervals. . Reference numeral 9 denotes an upwardly facing stepped portion for receiving the top cover 10 provided at the upper part of the cylinder body 6. The top cover 10 is fitted from the upper end opening of the cylinder body 6, and the upper edge 11 of the cylinder body 6 is subjected to heat processing or the like. It is curved inwards, and the upper circumferential edge 10a of the top cover 10 is hugged and fastened between it and the stepped part 9 to form a bell shape.

To seal electrical meters using the sealing tool shown in the above embodiment, first align the mounting holes of the instrument housing D and its lid E, and place the wedge inner cylinder A on the lid E. Then, as shown in Fig. 1, insert the screw S into the wedge inner tube A from its tip, pass through the body of the screw S, and screw it into the housing D with a screwdriver, and insert it into the chin Sb of the head Sa. The upper surface of the periphery of the center hole 5 is pressed, and the lid body E is tightened against the wedge inner cylinder A at the lower surface of the bottom. The head Sa of the screw S is screwed into the inner cavity of the wedge inner cylinder A to tighten the lid E to the frame housing D.

Next, when the bell-shaped mantle B integrally formed with the protective short cylinder C is placed over the wedge inner cylinder A and pressed, the inclined head 3 narrows the vertical groove 2 and reduces the diameter inward, causing the bell The stepped portion 7 of the shaped mantle B passes through the wedge portion 4 of the wedge inner cylinder A, and when the passage is completed, the diameter of the inclined head 3 is restored and expanded, and the wedge portion 4 and the stepped portion 7 are engaged to prevent return. It does not work and seals the screw head Sa.

〔effect〕

The present invention is a wedge made of an elastic material, in which a plurality of longitudinal grooves 2 are provided on the outer periphery of a bottomed cylindrical body 1 having a central hole 5, and an inclined head part 3 and a downward wedge part 4 connected thereto are formed. In a sealing device in which an inner cylinder A and a bell-shaped sleeve B having an upward step 7 on the inner peripheral surface that can engage with the wedge portion 4 are fitted together, the bell-shaped sleeve B and Since this is a sealing device in which one end of the connecting piece 8 provided on the inner wall surface of the integrally formed protective short cylinder body C is connected in the tangential direction of the outer peripheral surface of the bell-shaped mantle B, the inside of the wedge The bell-shaped sleeve B that fits into the tube A is integrally formed with the protective short tube C via the connecting piece 8, so that
It is sturdy and can be tightly fastened, so there is no risk of loosening and the sealing operation is simple and easy. After sealing, if the protective short cylinder C is rotated in an attempt to remove the seal for the purpose of power theft, the connecting piece 8 connected to the bell-shaped mantle B
Since they are connected in the tangential direction, they are easily broken and the rotation is not transmitted to the bell-shaped mantle B, so there is no room for unauthorized use, and the connecting pieces 8 can always be checked from the plane, making it easier to detect fraudulent activities. .

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a longitudinal cross-sectional view of the state in use, Fig. 2 is a plan view of the short protective cylinder integrally attached to the bell-shaped mantle, and Fig. 3 2 is a longitudinal sectional view taken along the line A-A in FIG. 2, FIG. 4 is a longitudinal sectional view of the wedge inner cylinder, FIG. 5 is a plan view thereof, and FIG. 6 is a conventional longitudinal sectional view. DESCRIPTION OF SYMBOLS 1... Bottomed cylindrical body, 2... Vertical groove, 3... Inclined head, 4... Wedge part, 5... Center hole, 7... Step part,
8...Connecting piece, A...Wedge cylinder, B...bell-shaped mantle,
C...Protective short cylinder.

Claims (1)

[Scope of utility model registration request] A wedge inner cylinder A made of an elastic material, in which a plurality of longitudinal grooves 2 are provided on the outer periphery of a bottomed cylindrical body 1 having a center hole 5, and an inclined head part 3 and a downward wedge part 4 connected thereto are formed. and a bell-shaped mantle B having an upward step 7 on the inner circumferential surface that can engage with the wedge part 4 are fitted together. A sealing device formed by connecting one end of a plurality of connecting pieces 8 radially provided on the inner wall surface of a short protective cylinder C formed in a tangential direction to the outer circumferential surface of a bell-shaped envelope B.