JP4699903B2 - Sealing tool - Google Patents

Description

  The present invention relates to a sealing tool used for a meter such as a watt hour meter.

Conventionally, the applicant has applied for a sealing device for a watt hour meter, which is a meter, having the following configuration. That is, the sealing tool is made of synthetic resin, and has an inner hole that is attached to the head of the sealing screw on the lower surface of one side of the main body, and the base end of the main body is outside along the longitudinal direction inside the main body. A press-fitting hole that opens and communicates with the inner hole at the front end side is formed. Then, the inner hole is attached to the head of the sealing screw screwed to the terminal lid of the watt-hour meter, and in this state, the metal sealing pin is inserted into the press-fitting hole of the main body from the base end side of the sealing screw head And press-fitted so as to reach the opposite side of the internal hole (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 63-76876 (page 4-7, FIGS. 6 to 8)

  As described above, the sealing device of Patent Document 1 presses the sealing pin into the press-fitting hole established in the main body and inserts it into the lateral hole of the sealing screw, and in general, the sealing pin is made of metal, sealing. The tool is formed of a synthetic resin. By the way, although the outer diameter of the sealing pin and the inner diameter of the press-fitting hole are set to predetermined dimensions in terms of the fitting, the shrinkage rate at the time of cooling particularly in synthetic resin molding such as a sealing tool If the inner diameter of the press-fitting hole is smaller than the outer diameter of the sealing pin, it is very difficult to press-fit the sealing pin into the press-fitting hole. On the other hand, if the inner diameter of the press-fitting hole is larger than the outer diameter of the sealing pin, the sealing pin will come out from the press-fitting hole without any function. For this reason, it is very difficult to select the design dimensions of the press-fitting hole from the viewpoint of suppressing defective products as much as possible, and as described above, the sealing pin does not fit into the press-fitting hole or loosely slips out even if fitted. At present, it is difficult to design and produce so-called defective products.

  Moreover, it is troublesome to press the sealing pin into the press-fitting hole, and the workability is not good. In particular, since the resin becomes hard due to a decrease in temperature in cold regions, for example, even if the inner diameter of the press-fitting hole is approximately the same as the outer diameter of the sealing pin, it is difficult to insert the sealing pin into the press-fitting hole. It may take.

  On the other hand, the relationship between the sealing pin and the sealing screw is both made of metal, and the inner diameter of the lateral hole is relatively large with respect to the outer diameter of the sealing pin, and it is needless to consider errors. That is, it is easy to insert the sealing pin into the horizontal hole.

  Accordingly, the present invention has been made in view of the above problems, and provides a sealing tool that can be easily designed and manufactured without a conventional press-fitting hole, and that sealing work is facilitated and workability is remarkably improved. It is intended.

Sealing device according to the present invention for achieving the above object, an outer frame member of flat, substantially oval that one upper and lower end faces are opened is narrower than the outer frame member lower end surface is opened with the upper end face is closed A flat , oblong inner frame member that fits into the outer frame member so as not to be opened , and has a support projection that protrudes inwardly on the inner surface of the outer frame member on the large-diameter side. One end is supported by the support protrusion, and a sealing pin inserted into a lateral hole of the sealing screw head is arranged and fixed, and the inner surface of the inner frame member extends to the larger diameter side of the inner frame member . a stop for the tip facing position provided, when the inner frame member is fitted so as not to open to the outer frame in the member while inserting the sealing pin into transverse bore of the sealing screw head, wherein said stop the sealing pin spacing between the sealing pin tip inserted through the transverse hole from the lateral hole Characterized in that it is set in pulled out not to size.

  The present invention provides a sealing pin that is disposed and fixed inside an outer frame member, and that the sealing pin is inserted into a lateral hole of a sealing screw head and the inner frame member is fitted to the outer frame member so as not to be opened. Since it can be sealed in a state where it cannot be removed from the side hole, the press-fitting hole is eliminated as in the prior art, and design and production can be performed easily. In addition, since there is no need to press-fit the sealing pin into the press-fitting hole, the sealing work can be facilitated and workability can be improved. In particular, there is an effect that it can be easily sealed even in a cold region.

  Hereinafter, embodiments of a sealing device according to the present invention will be described in detail with reference to the drawings. 1 is a perspective view of a sealing device according to the present invention, FIG. 2 is an exploded perspective view thereof, FIG. 3 is an exploded perspective view seen from the other side, and FIG. 4 is a perspective view of the assembled state. The sealing device A according to the present invention is formed of a synthetic resin material, and is a flat, generally oval outer frame member 1 that is narrowed on one side. The inner frame member 2 is fitted to the outer frame member 1.

  The outer frame member 1 has a predetermined height and is open at both upper and lower end surfaces. A support protrusion 3 that protrudes inward is provided on the inner surface of the large diameter side, and one end is supported by the support protrusion 3 so that the metal sealing pin 4 is the center line in the longitudinal direction inside the outer frame member 1. Is horizontally arranged and fixed so as to extend to the small diameter side. The sealing pin 4 is inserted into a horizontal hole 29 provided at a predetermined height and penetrating through a head 24a of a sealing screw 24 described later. The length of the sealing pin 4 is set to be slightly longer than the diameter of the head 24a of the sealing screw 24.

  Engagement protrusions 5 and 5 project from the inner peripheral surface of the outer frame member 1 at two locations on both sides of the upper end portion so as to face each other. Each locking protrusion 5 has elasticity and is inclined so as to approach the inside as it advances toward the tip (downward). This is because the inner frame member 2 cannot be temporarily fixed or cannot be opened to the outer frame member 1 by engaging the respective locking projections 5 with the respective engagement holes 10a and 10b on the inner frame member 2 side described later. It is for making it fit in. A thin portion 6 is provided at an appropriate position on the inner peripheral surface of the outer frame member 1 by cutting a V-groove in the vertical direction. This is because it was easily broken at the part, and when trying to remove the sealing tool A for fraud, the sealing tool A was fraudulently caused to break apart from each thin portion 6. This is to make it easier to understand.

  The inner frame member 2 also has substantially the same height as the outer frame member 1, and the upper end surface is closed by the top plate 7 and the lower end surface is open. A stop plate portion 8 as a stop portion is provided integrally with the inner frame member 2 on the inner surface on the small diameter side. The stop plate portion 8 extends toward the large diameter side along the center line in the longitudinal direction inside the inner frame member 2. However, there is a space that can be attached to the head 24a of the sealing screw 24 between the front end surface 8a of the stop plate portion 8 and the inner peripheral surface on the large diameter side. Further, since the inner frame member 2 is fitted into the outer frame member 1 on the large diameter side, a recessed portion 9 into which the support protrusion 3 is fitted is provided.

  On both side surfaces of the inner frame member 2, upper and lower engagement holes with which the respective locking protrusions 5 are engaged with the upper and lower positions thereof corresponding to the respective locking protrusions 5 of the outer frame member 1. 10a and 10b are established. In addition, a V-groove is formed on the peripheral side surface including the top plate portion 7 to provide a thin portion 6.

  The sealing tool A according to the present invention has the above-described configuration, and when shipped from a factory, the inner frame member 2 is disposed on the upper surface of the outer frame member 1 as shown in FIG. The engagement protrusions 5 are engaged with each other and temporarily engaged with the engagement holes 10b in the lower portions. In this state, since the tip of each locking projection 5 is inclined inward, the inner frame member 2 cannot be removed from the outer frame member 1 when engaged at one end as described above. . Therefore, only one of the outer frame / inner frame members 1 and 2 is lost and cannot be used.

  FIG. 5 shows a use state of the sealing tool A, and 20 is a watt hour meter as a meter. The watt-hour meter 20 has a transparent cover member 22 attached to the front surface of the meter body 21. Moreover, the lower end of the meter main body 21 is a terminal portion 21a, and a terminal lid 23 is attached to the front surface thereof. Sealing screws 24 are screwed to the terminal lid 23 at two locations on the left and right.

  As shown in FIG. 6, each of the sealing screws 24 is inserted through a screw insertion hole 25 provided in the terminal lid 23, and a screw hole 27 provided in a mounting piece 26 fixed in the terminal portion 21a. It is designed to be screwed on. As a result, the terminal lid 23 is fixedly attached to the terminal portion 21a. Further, a lateral hole 29 through which the sealing pin 4 is inserted is provided in the head 24 a of the sealing screw 24. On the surface of the terminal lid 23, protruding portions 28 formed by cutting and raising the terminal lid 23 by pressing are formed in the vicinity of the screwed sealing screws 24, respectively. This has a function to prevent the sealing tool A from rotating around the sealing screw 24 on the surface of the terminal lid 23.

  Therefore, first, the sealing tool A temporarily fixing the inner frame member 2 is attached to the head 24a of the sealing screw 24 as shown in FIG. At this time, adjustment is made so that the lateral hole 29 of the head 24a and the sealing pin 4 are arranged substantially in a straight line. In this state, the sealing tool A is slid in a predetermined direction along the surface of the terminal lid 23, and the sealing pin 4 is inserted into the lateral hole 29 of the head 24a of the sealing screw 24 as shown in FIG.

  Further, the inner frame member 2 is pushed into the outer frame member 1 in this state. As a result, as shown in FIGS. 8 and 9, the locking protrusions 5 on the outer frame member 1 side are fitted into the upper engagement holes 10 a on the inner member 2 side, so that the inner frame member 2 is The frame member 1 is fitted so as not to be opened. Moreover, the front end surface 8a of the stop plate portion 8 and the front end surface 4a of the sealing pin 4 facing the stop plate portion 8 are close to each other. In this state, the sealing pin 4 is removed from the lateral hole 29 no matter how much the sealing tool A is slid. It can no longer be removed, and it performs a sealing function. That is, the distance between the front end surface 8 a of the stop plate 8 and the front end surface 4 a of the sealing pin 4 inserted through the horizontal hole 29 is set to a dimension that the sealing pin 4 cannot be removed from the horizontal hole 29. become.

  Thus, in the present invention, the sealing pin 4 is disposed and fixed inside the outer frame member 1, the sealing pin 4 is inserted into the lateral hole 29 of the head 24 a of the sealing screw 24, and the inner frame member 2 is used as the outer frame member. The sealing pin 4 can be sealed in a state where the sealing pin 4 cannot be removed from the lateral hole 29 only by being fitted to 1 in a manner that cannot be opened. Therefore, the conventional press-fitting hole is eliminated, and the design and production of the sealing screw and the sealing tool can be performed easily. In addition, quality control becomes easier with fewer defective products.

  Further, the sealing pin 4 and the sealing screw 24 are both made of metal, and the molding error is smaller than that of resin. Therefore, since the selection of the outer diameter of the sealing pin 4 with respect to the lateral hole 29 of the sealing screw 24 is simple, the sealing pin 4 can be easily inserted into the lateral hole 29 in the field. Therefore, there is no need to press-fit the sealing pin into the press-fitting hole as in the prior art, so that no effort is required and the sealing work is facilitated, and the work efficiency is improved. In particular, it can be easily sealed even in cold regions.

  In the present invention, the stop plate portion 8 is provided integrally with the inner frame member 2 on the inner peripheral surface of the inner frame member 2 as a stop portion, but is not limited to this shape. For example, the thickness of the side wall of the inner frame member 2 may be increased as it is.

The perspective view of the sealing tool which concerns on this invention. The exploded perspective view. The exploded perspective view seen from the other side. FIG. The perspective view of the watt-hour meter which shows the use condition of the sealing tool which concerns on this invention. Sectional drawing of the principal part explaining the procedure of sealing. Sectional drawing of the principal part explaining the procedure of sealing. Sectional drawing of the principal part explaining the procedure of sealing. XX sectional drawing of FIG.

Explanation of symbols

1 outer frame member 2 inner frame member
3 Supporting protrusion 4 Sealing pin 8 Stop part (stop plate part)
24 sealing screw 24a head 29 side hole A sealing tool

Claims (1)

A planar substantially oval outer frame member whose upper and lower end faces are open and one side is narrowed ;
And inner frame member lower end face is opened in flat, substantially oval to non-openable fitted in the outer frame member from the slightly smaller outer frame within member with the upper end face is closed, consists of,
A support protrusion protruding inwardly is provided on the inner surface on the large diameter side of the outer frame member, and one end is supported on the support protrusion, and a sealing pin inserted into a lateral hole of the sealing screw head is disposed and fixed.
Provided on the inner surface of the inner frame member is a stop portion that extends to the large diameter side of the inner frame member and is positioned opposite the tip of the sealing pin;
The inner frame when the member is fitted so as not to open to the outer frame member, the sealing pin tip which is inserted through the transverse hole and the stop while inserting the sealing pin into transverse bore of the sealing screw head Is set to such a dimension that the sealing pin cannot be removed from the lateral hole .

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