JPH071665Y2 - Meter sealing structure - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) The present invention relates to a sealing structure for a gas meter or the like.

(Prior Art) In a gas meter or the like, a verification seal for sealing a meter case and its lid at the time of verification is performed.

Conventionally, the sealing structure of this meter has been as shown in FIGS. That is, as shown in FIG. 5, an upper case 2 which is a meter case is attached on a lower case 1 which constitutes a measuring chamber. A counter (not shown) for displaying the measurement result is built in the upper case 2, and the front surface is opened so that the counter can be visually recognized. A lid 4 having a transparent window 3 in the center is attached to the opening, and the periphery of the lid 4 is fixed to the upper case 2 by four screws 5.

As shown in FIG. 6, one of the four screws 5 is provided with a sealing bracket 6 formed in the shape of a strip of a metal thin plate through a hole 7 provided at the substantially central portion thereof, as shown in FIG. It is mounted as shown and is fastened together with the lid 4 to the upper case 2. After the sealing bracket 6 is bent, both ends are integrally inserted into the hole 9 of the sealing lead 8 and fixed under pressure to perform sealing. At this time, the certification mark and the certification date are simultaneously engraved on the front and back of the sealed lead 8.

(Problems to be solved by the invention) However, according to the above-mentioned conventional sealing structure, the screw 5 is inserted into the hole 7 of the sealing bracket 6, and the sealing bracket 6 and the lid 4 are fastened to the upper case 2 together with the screw 5. However, it is necessary to attach the sealing lead 8 after the sealing bracket 6 is bent, and these operations are difficult to automate. Therefore, there is a problem that automation of the assembly line becomes difficult.

The present invention has been made in view of the above points, and an object thereof is to provide a meter sealing structure capable of automating a meter sealing operation and facilitating automation of an assembly line.

[Constitution of device]

(Means for Solving the Problem) In order to achieve the above-mentioned object, the present invention has a lid mounted on the front surface of a meter case having a built-in counter, and a plurality of peripheral edges of the lid are provided in the meter case. In a sealing structure of a meter that seals at least one of these screws when fixing with a screw, a screw mounting seat having a substantially hemispherical concave surface is formed in the lid body, and the head of the screw is formed. And a screw part are formed on the outer periphery between the screw mounting seat and the screw mounting seat, and a sealing member is pressure-filled in the screw mounting seat to seal the screw head mounted on the screw mounting seat. At the same time when the sealing is stopped, a verification marking is made on the outer surface of the sealing member.

(Operation) According to the above configuration, after the lid body is fixed to the meter case with the screw having the protruding portion formed on the outer periphery, the sealing member is pressure-filled in the screw mounting seat, so that the sealing member is the head of the screw. And the protrusion, and covers the screw head. As a result, the screw is integrated with the lid through the sealing member and is firmly sealed. This operation can be easily automated because the sealing member is only pressure-filled in the screw mounting seat at the predetermined position. Further, since the verification marking can be performed at the same time, the marking work can be easily automated.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 to 3 show one embodiment of the present invention. In these figures, the same or equivalent parts as those of the conventional example shown in FIGS. 5 and 7 are designated by the same reference numerals.

In FIG. 2, an opening (not shown) for visually recognizing a counter (not shown) provided inside is formed on the front surface of the upper case 2 which is a meter case, and a transparent window 3 is formed in the center of this opening. The provided lid body 4 is attached. The lid body 4 is fixed to the upper case 2 by four screws 5 provided near the four corners, and one of these four screws 5 is a head 10a as shown in FIG. Screw part 10b
It has a special shape in which a protruding portion 10c is formed on the outer periphery between and.

On the other hand, a screw mounting seat 11 having a substantially hemispherical concave surface is provided on the surface of a portion of the four corners of the lid body 4 through which the screw 10 penetrates. When the lid 4 is fixed to the upper case 2 with the screws 5 and 10, the protruding portion 10c of the screw 10 has the screw mounting seat 11
And the head 10a of the screw 10 projects into the screw mounting seat 11. Further, the sealing lead 12, which is a sealing member, is formed in a cylindrical shape with a bottom as shown in FIG. 3, and the outer periphery of the sealing lead 12 can be fitted into the inner periphery of the screw mounting seat 11. The inner circumference of is sized so that the head 10a of the screw 10 can be fitted therein.

Next, the operation of this embodiment will be described. After fixing the lid 4 to the upper case 2 with the screws 5 and 10, seal the lead in the screw mounting seat 11.
The bottom portion 12a is fitted with the bottom portion 12a on the front side, and the bottom portion 12a is pressed by a pressure means (not shown) and press-fitted into the screw mounting seat 11. As a result, the sealing lead 12 is in close contact with the outer circumference of the head 10a and the protruding portion 10c of the screw 10 and, at the same time, in close contact with the inner peripheral surface of the screw mounting seat 11 to firmly seal the screw 10. In addition, the bottom surface 12a of the sealed lead 12 is provided by providing a character or numeral pattern to be engraved on the pressurizing means side.
On the surface of the, for example, as shown in FIG.
The certification date 13 can be marked on the lower row.

According to this embodiment, the screw 10 can be sealed and engraved at the same time by simply press-fitting the sealing lead 12 into the screw mounting seat 11, so that the sealing operation can be easily automated. Also, automation of the assembly line becomes easy.

Although the sealing structure of the gas meter has been described in the above embodiment, the same effect can be obtained by applying it to an electricity or water meter.

[Effect of device]

As described above, according to the present invention, the screw can be sealed and engraved at the same time by simply press-filling the screw mounting seat formed on the lid with the sealing member. Can be automated and the assembly line can be automated easily.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an essential part of an embodiment of the present invention, FIG. 2 is a front view showing a meter case to which an embodiment of the present invention is applied, and FIG. 3 is a perspective view showing a sealed lead. Figure, 4th
Similarly, the figure is a front view showing an example of marking of sealed lead, FIG. 5 is a front view showing a gas meter having a conventional sealing structure, FIG. 6 is a perspective view showing a conventional sealing bracket, and FIG. 7 is a conventional sealing structure. FIG. 2 ... Meter case (upper case) 4 ... Lid 5,10 ... Screw 10a ... Head 10b ... Thread 10c ... Projection 11 ... Screw mounting seat 12 ... Sealing member (sealing lead) 13 ... Engraving

Claims (1)

[Scope of utility model registration request] 1. When a lid is mounted on the front surface of a meter case having a built-in counter and the peripheral edge of the lid is fixed to the meter case by a plurality of screws, at least one of these screws is used. In a sealing structure of a meter for sealing a screw, a screw mounting seat having a substantially hemispherical concave surface is formed on the lid, and the screw mounting seat is brought into contact with an outer circumference between a head portion and a screw portion of the screw. A protrusion is formed, and a sealing member is pressure-filled in the screw mounting seat to seal the screw head mounted on the screw mounting seat, and at the same time, a verification marking is performed on the outer surface of the sealing member. The sealed structure of the meter characterized by the above.