JPH0210547Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention seals the fixing fittings such as bolts and screws that screw and fix the closed part of the opening/closing lid in order to prevent the inside of the electricity meter etc. from being opened. The present invention relates to an improved structure of a sealing device that prevents fraudulent acts, and is particularly suitable for use in large instruments for large-scale customers.

[Prior art and its problems] Various sealing devices of this type have been known in the past, but
For example, the device described in Japanese Utility Model Publication No. 47-24311 and No. 24312, which was invented by the applicant, has projecting pieces on both sides of a vertical cylinder part, and a fitting horizontal hole extending horizontally on the center line of the projecting pieces. and a crown body provided with a communicating horizontal hole that matches the fitting horizontal hole in the closed-head tube to be fitted into the vertical cylinder portion so that the fitting horizontal hole and the communicating horizontal hole match each other. , the crown body is placed over the head of a screw that screws and fixes the opening/closing lid of the instrument, and is locked in the horizontal hole penetrating the head of the screw, the fitting horizontal hole, and the communicating horizontal hole. By threading the pin through, they are joined together so that the screw head cannot be directly rotated with a screwdriver, etc., and against the act of attempting to unthread the screw by rotating the main body. teeth,
The protruding piece hits against the side wall of the instrument or the opening/closing lid, making it impossible to rotate the main body, thereby preventing fraudulent activity.

However, as is clear from the usage examples illustrated in the publication, all of these sealing devices are relatively small and are effective for instruments or devices where the side wall of the opening/closing lid forms a standing wall and blocks the projecting piece. However, if the surface of the opening/closing lid is a wide flat surface, such as a large electricity meter for large-scale consumers, and there is no standing wall to block it, the rotation of the main body cannot be prevented. However, there is a serious problem of not being able to prevent fraudulent activities.

[Purpose of the invention] An object of the invention is to provide a sealing device that can completely prevent fraudulent acts performed by opening the opening/closing lid of a particularly large electric energy meter.

[Structure of the invention] A projecting piece is provided on one side of the outer surface of a closed-head cylinder that is attached to the head of a tightening screw, and a hanging piece is provided extending from the tip of the projecting piece. An opening groove is formed in the top of the closed-head cylinder body, horizontal holes are bored in the side wall at a position communicating with the overhang piece, and a position opposite thereto, and the inside of the closed-head cylinder body and the overhang piece is bored. A cut groove is provided in the wall surface in a direction perpendicular to the direction of the horizontal hole to form a weak point.

[Example] In the figure, 1 is a closed-head cylinder that is attached to the head of a tightening screw, and a projecting piece 2 is provided protruding from one side of the outer surface of the closed-head cylinder 1. A hanging piece part 3 that is vertically bent downward is extended from the tip of the protruding piece part 2. As shown in FIG. 3, the inner side of the overhang piece part 2 is thinned, but a thick part 4 is provided at the connection part with the closed-head cylinder 1, and the side wall of the closed-head cylinder 1 is also thickened. is provided with a thick wall portion 5 in a portion facing the overhanging piece portion 2,
A horizontal hole 6 is bored from this thick portion 5 to the thick portion 4, and a locking pin 7 is inserted through this horizontal hole 6.

Further, cut grooves 8 and 9 having a V-shaped cross section are provided in the inner wall surfaces of the closed-head cylinder body 1 and the overhang piece part 2 in a direction perpendicular to the insertion direction of the locking pin 7 to form weak points. An opening groove 10 is provided at the top of the cylindrical body 1 in the same line as the cut groove 9.

Next, the use of the sealing device A of the present invention constructed as described above will be explained. 11 in Figures 4 to 6
is an instrument box; 12 is an opening/closing lid of the instrument box 11; a screw catch 13 is fixed to the instrument box 11;
A screw insertion hole 14 is opened opposite the screw hole 13a of the screw holder 13, and the screw insertion hole 14
Cut a part of the opening/closing lid 12 and raise it next to the
It forms an insertion part 15 for the sealing string. Reference numeral 16 denotes a tightening screw that is inserted through the screw insertion hole 14 and fastened to the screw receiver 13, and has a horizontal hole 17 communicating with the horizontal hole 6 passed through the head.

Then, as shown in FIG. 4, the closed-head cylindrical body 1 of the sealing device A is attached to the head of the tightening screw 16 that has been tightened, and the lower surface of the overhanging piece 2 is attached to the surface of the opening/closing lid 12. The side wall surface 18 of the opening/closing lid 12 along with the hanging piece 3
In the locked state, the locking pin 7 is driven through the communicating horizontal holes 6 and 17.

The seal A installed in this manner hides the head of the tightening screw 16 as shown in FIG. , it is possible to make people realize that it is extremely difficult to commit fraudulent acts.

Even beyond this recognition, fraud is still being committed,
If an attempt is made to move the overhanging piece 2 or the hanging piece 3, the tip of the overhanging piece 2 will be cut off along with the hanging piece 3 by the cut groove 8, and from the appearance shape, there will be no chance of tampering. It can be clearly seen that However, in this state, the tightening screw 16 cannot be removed from the screw holder 13, and the fraudulent act will not be successful, so it is necessary to try to rotate the seal A in order to succeed in the fraudulent act. If the remaining overhang piece 2
is the insertion part 1 of the sealing string that protrudes from the surface of the opening/closing lid 12.
5, the rotation is blocked and the tightening screw 16 cannot be removed from the screw holder 13, and as a result, the opening/closing lid 12 cannot be opened, resulting in a fraudulent act. There isn't.

In this way, the sealing device A of the present invention not only prevents fraudulent acts, but also allows the opening groove 1 provided at the top of the closed-head cylinder body 1 to
By inserting a screwdriver into the hole and twisting the screwdriver, the closed-head cylinder body 1 is easily destroyed by the cut groove 9 and the locking pin 7 is exposed, so the locking pin 7 is pulled out from the through holes 6 and 17. The tightening screw 16 can be unscrewed.

[Effects of the invention] As mentioned above, the sealing device of the present invention has the effect of discouraging fraudulent acts due to its external shape, and even if fraudulent acts are carried out, it can be easily destroyed due to the weak points and the appearance will be damaged. The shape changes noticeably, making it possible to recognize that a fraudulent act has been committed. Moreover, even in this state, the tightening screw will not be prevented from coming off and the fraudulent act will not be successful.

It also has many advantages, such as the fact that it can be easily destroyed and removed during full inspection and replacement.

[Brief explanation of the drawing]

The figures relate to an embodiment of the present invention, and FIG. 1 is a perspective view, FIG. 2 is a bottom view, FIG. 3 is a sectional view, and FIGS. 4 and 5 are perspective views for explaining usage examples. FIG. 6 is a sectional view of the device in use. DESCRIPTION OF SYMBOLS 1... Closed-head cylindrical body, 2... Overhang piece part, 3... Hanging piece part, 6... Horizontal hole, 8, 9... Cut groove, 10...
Opening groove.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A projecting piece is provided on one side of the outer surface of a closed-head cylinder that is attached to the head of a tightening screw, and a hanging piece is provided at the tip of the projecting piece. The side wall of the closed-head cylindrical body is provided with horizontal holes at a position communicating with the overhanging piece and at a position opposite thereto, and the inner wall surface of the closed-head cylindrical body and the overhanging piece. A sealing device in which a weak point is formed by providing a cut groove in a direction perpendicular to the direction of the horizontal hole. 2. The sealing device according to claim 1 of the utility model registration claim, characterized in that an opening groove is provided at the top of the closed-head cylinder.