JPH076495Y2 - Gas meter air supply / exhaust structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a gas supply / exhaust structure for a gas meter.

(Prior Art) The air supply / exhaust ports of a gas meter are formed to connect an outer measuring chamber, which is separated from an inner measuring chamber by a membrane, to a distribution chamber for the outer measuring chamber, as is well known. However, it is necessary to seal around the air supply / exhaust port to prevent gas from leaking to the inner measuring chamber.

As for the structure of the air supply / exhaust port, as shown in FIG. 3 (a), the air supply / exhaust port opened in the body A at a part of the outer periphery of the sac membrane 1 for fixing the peripheral rim 1a inside the body A is conventionally used. The packing 3 attached to the periphery of 2 is integrally formed, or as shown in FIG. 3 (b), the air supply / exhaust port packing 4 independent of the above-mentioned membrane is fixed to the periphery of the air supply / exhaust port 2. Either structure is taken.

In addition, the membrane 1 between the air supply and exhaust port 2 and the periphery of the membrane 1
A capsular bridge is required for the seal between the two metering chambers separated by.

For this reason, conventionally, as shown in FIG.
And, on the back surface side of the abdominal plate 5 having the projecting portion 5a in which the air supply / exhaust port 2 is continuous, the both ends of the pre-membrane membrane bridge 6 are adhered and fixed along the boundary portion between the air supply / exhaust port 2 and the membrane 1. In addition, with the abdominal plate 5 fixed to the body A, the sac bridge 6 is sandwiched at the boundary portion, whereby the measurement chambers are sealed.

(Problems to be solved by the invention) However, in this structure, the sacral bridge 6 is adhered to the back surface of the abdominal plate 5, so that the workability is poor, and a sealing failure due to a position error or internal leakage may occur. In addition, there is a fall of the scleral bridge 6 during assembly,
There is a risk of forgetting to bond them, etc., and all of these were factors that reduced the yield.

Therefore, the present invention provides a gas meter supply / exhaust structure in which the scleral bridge can be arranged at the boundary between the air supply / exhaust port and the peripheral edge of the sclera without adhering the capsular bridge to the abdominal plate. The purpose is to do.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention relates to an outer measuring chamber which is partitioned from an inner measuring chamber by a membrane provided in a body of a gas meter, and a distribution for the outer measuring chamber. An independent air supply / exhaust port packing is arranged on the periphery of the air supply / exhaust port that communicates with the chamber, and the air supply / exhaust port packing faces the upper surface of the outer peripheral edge portion of the membrane that is disposed adjacent to the air supply / exhaust port packing. Arc-shaped acacia bridge is integrally extended, and the acacia bridge is clamped and fixed by the abdominal plate fixed to the opening surface of the body, and the measurement chambers are hermetically sealed. To do.

Further, in the present invention, a sac membrane bridge may be integrally provided on the peripheral portion of the sac membrane toward the arc portion of the air supply / exhaust port packing.

(Operation) According to the above configuration, if the membrane is fixed to the body and then the air supply / exhaust port packing is fixed to the peripheral edge of the air supply / exhaust port, the membrane bridge inevitably integrated therewith is formed. Accurately overlaps the peripheral edge of the scapula, and then by fixing the abdominal plate to the body, the acacia bridge is sandwiched between the abdominal plate and the peripheral sac of the abdominal plate, and the space between the air supply / exhaust port and the measuring chamber is fixed. Seal it.

In the second aspect, the attachment procedure is the reverse of the above, so that the scleral bridge also overlaps the boundary portion with high accuracy.

(Embodiment) An embodiment of the present invention will be described in detail below with reference to the drawings. Note that the same parts as those of the related art will be denoted by the same reference numerals, and different parts will be described by using different reference numerals.

1 (a) and 1 (b) show an air supply / exhaust port packing 10 according to the present invention, and FIG. 2 shows an assembled state using the packing 10.

The air supply / exhaust port packing 10 in the figure is a rubber-like molded body separate from the sac membrane 1, and is formed in an elliptic diameter whose inner side is curved in an arc shape along the shape of the air supply / exhaust port 2.

An upper part of the curved part 10a of the air supply / exhaust port packing 10 has an arcuate shape similar to this, and a sac bridge 12 which overlaps the rim 1a at the periphery of the sac 1 having an inverted L-shaped cross section is overhung. It is integrally molded into a shape.

In the above-mentioned structure, the peripheral portion of the primal membrane 1 is attached to the body A.
When the air supply / exhaust port packing 10 is fixed to the periphery of the air supply / exhaust port 2, the capsule bridge 12 accurately overlaps the upper part of the peripheral rim 1a of the capsule 1 along the arc thereof. It will be.

Therefore, if the abdominal plate 5 is adhered to the body A in this state, the alveolar bridge 12 is sandwiched between the abdominal plate 6 and the body A, and the measurement chambers are sealed.

It should be noted that in the case of the packing-integrated sac membrane shown in FIG. 3 (a), since the sac membrane bridge has an overhang shape and vulcanization is less likely to proceed as compared with other portions, this invention Does not apply.

However, contrary to the embodiment, it is also possible to integrally form the scleral bridge 12 on the outer peripheral rim portion 1a of the sclera 1 except for the above-mentioned disadvantageous conditions. On the contrary, fix the air supply / exhaust port packing 10 to the body A first,
Then, the membrane 1 may be fixed.

(Effects of the Invention) As described in detail with reference to the embodiments above, in the gas meter air supply / exhaust structure according to the present invention, the bonding work of the membrane bridge to the abdominal plate can be omitted as compared with the conventional structure.
It is possible to simplify the assembly, improve the positional accuracy of the uraca bridge, and prevent a decrease in yield due to mistakes such as falling out and forgetting to adhere.

[Brief description of drawings]

1 (a) and 1 (b) are explanatory views of the air supply / exhaust port packing according to the present invention, FIG. 2 is an explanatory view of an assembled state using the packing, and FIGS. 3 (a) to 3 (c) are conventional drawings. It is explanatory drawing which shows an air supply / exhaust port structure. A ... Body 1 ... Scaacia 1a ... Rim (peripheral part) 2 ... Air supply / exhaust port 5 ... Abdominal plate 10 ... Air supply / exhaust port packing 12 ... Scalyx bridge

Claims (2)

[Scope of utility model registration request] 1. An outer shape measuring chamber which is partitioned from an inner measuring chamber by a membrane provided on the body of a gas meter, and a distribution chamber for the outer measuring chamber which communicates with each other, has an independent shape at the periphery of an air supply / exhaust port. In addition to arranging the air supply / exhaust port packing, an arcuate sac membrane bridge is integrally extended to the air supply / exhaust port packing toward the upper surface of the outer peripheral edge of the sac membrane disposed adjacent thereto. A gas meter air supply / exhaust structure, characterized in that the abdominal plate fixed to the opening surface of the body clamps and fixes the capsular bridge to hermetically seal between the respective measuring chambers. 2. The air supply / exhaust structure for a gas meter according to claim 1, wherein a capsular bridge is integrally provided on the peripheral edge of the capsular membrane toward the arc portion of the air supply / exhaust port packing. .