JP4087417B2 - Duct detector for ventilation - Google Patents

Description

  The present invention relates to a ventilation duct detection tool that is embedded in a wall surface of a building and covered with a decorative board or the like, and that allows the position of the ventilation duct to be embedded easily and quickly with a detector.

Conventionally, in order to find out the buried position of a ventilation duct covered with a decorative board or the like buried in the wall surface of a building, the dimensions of the building are measured based on the design drawing.

For this reason, it takes a lot of time and effort to find the buried ventilation duct, and there is a disadvantage that the ventilation duct is not buried as shown in the design drawing. There is a drawback that it is necessary to carry out a re-covering operation of a decorative board or the like.
Japanese Patent No. 3136283

    In view of the above-described conventional drawbacks, the present invention can easily and quickly find the embedded position of an embedded ventilation duct covered with a decorative plate or the like, and has an inner diameter dimension. It is an object of the present invention to provide a ventilation duct detector that can be easily and accurately attached to different ventilation ducts.

The above and other objects and novel features of the present invention will become more fully apparent when the following description is read in conjunction with the accompanying drawings.
However, the drawings are for explanation only and do not limit the technical scope of the present invention.

In order to achieve the above object, the present invention provides a disk-shaped sensor support that can be accommodated in a ventilation duct embedded in a wall of a building so as to have play, and the center of the sensor support is coincident with the sensor support. A ring-shaped resonance circuit as a sensor provided with a condenser, and a ventilating duct in which a portion near the center is attached to the sensor support body so as to be slidable in the radial direction. A central support plate supported at approximately 120 degree intervals on the wall surface and a support portion formed at a location near both ends, a central sustaining plate that is always given elastic force in the expanding direction, and near both end portions of this central maintaining plate The center portion of the center maintaining plate and the support portions near the both ends are formed on the center support plate and a guide member that guides the center circumference of the sensor support body to form a ventilation duct detector. .

  As is clear from the above description, the present invention has the following effects.

(1) A disk-shaped sensor support that can be accommodated in a ventilation duct embedded in the wall of a building so as to have play, and a condenser that is attached so that its center coincides with the sensor support A ring-shaped resonance circuit as a sensor provided with a sensor, and a portion near the center of the sensor support body, which is slidably mounted in a radial direction, at approximately 120-degree intervals on the inner wall surface of the ventilation duct. A center maintaining plate that is provided with elastic force in the normally expanding direction in which a support portion is formed in a portion near the center and both ends to be supported, and the center maintaining plate formed in a portion near both ends of the center maintaining plate, Since the support part at the center part of the center maintenance plate and the part near both ends is composed of a guide member that guides on the center circumference of the sensor support body, by installing it in the ventilation duct Even if it is covered with a decorative panel and the position of the buried plate cannot be determined, the embedded position of the buried ventilation duct can be easily detected in a short time by detecting the ring-shaped resonance circuit attached to the sensor support with the detector. Can be found and opened without forming unnecessary holes in the decorative board or the like.

(2) According to the above (1), since the center maintaining plate to which the elastic force is always applied in the expanding direction is used, it can be securely attached to the ventilation ducts having different inner diameters.
Therefore, one can be used for the inside diameter of the ventilation duct, and cost can be reduced and workability can be improved.

(3) According to the above (1), the center maintaining plate can be slidably moved in the radial direction on the sensor support body and guided by the guide member. It can be positioned in a state that substantially coincides with the central portion of.
Therefore, it is possible to always install the center portion of the ring-shaped resonance circuit as a sensor so as to be surely positioned at the stop portion of the ventilation duct, so that the detection by the detector can be performed more accurately.

(4) In claim 2, the same effects as in the above (1) to (3) can be obtained.

  Hereinafter, the present invention will be described in detail with reference to the best mode for carrying out the invention shown in the drawings.

  In the best mode for carrying out the present invention shown in FIGS. 1 to 10, reference numeral 1 is embedded in a wall 3 of a building 2 and attached to a ventilation duct 5 covered with a base material, a decorative board 4 or the like. In the ventilation duct detector of the present invention, the ventilation duct detector 1 is a shallow dish-shaped sensor support 7 having a cylindrical peripheral wall 6 that can be accommodated in the ventilation duct 5 so as to have play. A ring-like resonance circuit 10 in which a capacitor 9 is attached to a ring-like conductor 8 attached to the inner wall surface 6a of the sensor support 7 and a portion near the center of the sensor support 7 in the radial direction. A spring 12, which is slidably attached and is provided with support portions 11, 11, 11 formed at the central portion and the portions near both ends of the inner wall surface 5 a of the ventilation duct 5 that are supported at intervals of approximately 120 degrees. The central sustaining plate 13 to which an elastic force is applied in the time-expanding direction, and the support portions of the central portion of the central maintaining plate 13 and the portions near the both ends formed at the portions near the both end portions of the central maintaining plate 13 11, 11, 11 are constituted by guide members 14, 14 that guide on the circumference of the center of the sensor support 7.

  The sensor support 7 includes a disc-shaped bottom plate 15, a cylindrical peripheral wall 6 integrally formed on the outer periphery of the bottom plate 15, and a knob 16 formed so as to protrude from a substantially central portion of the inner surface of the bottom plate 15. A U-shaped support piece 17 integrally formed on the inner surface of the bottom plate 15, and radial guide holes 18, 18, 18 formed in the central support piece 17 a of the support piece 17 and the peripheral wall 6, 18, guide grooves 19, 19 formed in a portion of the support piece 17 near the tip of both side support pieces 17 b, 17 b, and a ring-shaped conductor of the resonance circuit 10 formed on the inner wall surface of the peripheral wall 6. 8 and a plurality of support portions 20 that support 8.

  The center maintaining plate 13 includes a center maintaining plate main body 21 having a projecting support portion 11 at the outer central portion formed in an arc having a larger diameter than the arc of the outer diameter of the sensor support 7, and the center maintaining plate. It protrudes inward to the lower part near the center of the main body 21, and is supported by the support holes 22, 22 supported so as to be slidable in the guide holes 18, 18, 18, 18, and both ends of the center maintaining plate main body 21. The formed connecting plates 24 and 24 having the recesses 23 and 23 into which the fingertips can be inserted are formed, and a plurality of protrusions 25 and 25 are formed on the outer surface integrally formed at the distal ends of the connecting plates 24 and 24. The support plates 11 and 11, the springs 12 whose both ends are attached to the inner wall surfaces of the connection plates 24 and 24, and the connection plates 24 and 24 are always biased in the opening direction, and the connection plates 24 and 24 Arc shape from the lower part on the tip side Protrude inward, while being guided by the guide groove 19, 19 of the sensor support body 7, and a guide member 14, 14 stopper piece 26 is formed to be stopped at the maximum open position.

The ventilating duct detector 1 having the above-described structure is connected to the connecting plate 24 of the center maintaining plate 13 when the wall surface 3 of the building 2 is formed or in the ventilation duct 5 before the wall surface 3 is covered with the base material, the decorative plate 4 or the like. , 24 parts are pressed and inserted, and the pressures of the connecting plates 24 and 24 are released at the part near the opening end, so that the support parts 11, 11, 11 of the center maintaining plate 13 are inside the ventilation duct 5. The wall surface is pressed by the urging force of the spring 12 to be in a locked state.
In this locked state, the center maintaining plate 13 brings the center of the sensor support 7 into the center of the ventilation duct 5.

By locking the ventilation duct detector 1 in the ventilation duct 5 in this way, even if the ventilation duct 5 is covered with the base material or the decorative board 4 and the position of the ventilation duct 5 is not known from the outside, resonance occurs. The position 28 is detected by the detector 27 of Japanese Patent No. 3136283 developed by the present inventor capable of detecting the circuit 10, and the hole 28 communicating with the ventilation duct 5 to the base material, the decorative board 4, etc. of the part. Can be formed using the drilling jig 29 of Japanese Patent No. 3732106 developed by the present inventors.
Further, by reducing the diameter of the center maintaining plate 13, the center maintaining plate 13 can be attached to the ventilation duct 5 having a different diameter in a state where the center of the ventilation duct 5 and the center of the sensor support 7 are aligned.
[Different forms for carrying out the invention]

  Next, different modes for carrying out the present invention shown in FIGS. 11 to 16 will be described. In the description of these different modes for carrying out the present invention, the same components as those in the best mode for carrying out the present invention are designated by the same reference numerals and redundant description is omitted. To do.

  The second embodiment for carrying out the present invention shown in FIG. 11 to FIG. 13 is mainly different from the best first embodiment for carrying out the present invention in that the opening 30 side is always elastic in the opening direction. The present invention is also applied to the ventilation duct detector 1A configured using the center maintaining plate 13A formed in this way in that the center maintaining plate 13A formed using an elastic material on which a force acts is used. The same effect as that of the first embodiment is obtained.

  The third embodiment for carrying out the present invention shown in FIGS. 14 to 16 is mainly different from the best first embodiment for carrying out the present invention in that the thick peripheral wall 6A does not use a bottom plate. And the sensor support 7A formed in this way in that the sensor support 7A in which the guide holes 18, 18 and the support portions 31, 31 of the guide members 14, 14 are formed on the inner wall surface of the peripheral wall 6A is used. Even in the ventilation duct detector 1B configured using 7A, the same effects as those of the best first embodiment for carrying out the present invention can be obtained.

  The present invention is utilized in the industry for manufacturing ventilation duct detectors.

1 is a front view of the best first embodiment for carrying out the present invention. The rear view of the best 1st form for implementing this invention. The side view of the best 1st form for implementing this invention. Sectional drawing in alignment with line 4-4 in FIG. 1 is a perspective view of the best first embodiment for carrying out the present invention. Explanatory drawing of the state which diameter-reduced the center maintenance board of the best 1st form for implementing this invention. The front view of the state attached to the ventilation duct of the best 1st form for implementing this invention. Sectional drawing which follows the 8-8 line of FIG. Explanatory drawing of the detection state in the detector of the best 1st form for implementing this invention. Explanatory drawing of the drilling state in the drilling jig | tool of the best 1st form for implementing this invention. The front view of the 2nd form for carrying out the present invention. The side view of the 2nd form for carrying out the present invention. Sectional drawing in alignment with line 13-13 in FIG. The front view of the 3rd form for carrying out the present invention. The side view of the 3rd form for carrying out the present invention. Sectional drawing which follows the 16-16 line of FIG.

Explanation of symbols

1, 1A, 1B: ventilation duct detection tool,
2: building, 3: wall,
4: Base material and decorative board, 5: Duct for ventilation,
6, 6A: peripheral wall, 7, 7A: sensor support,
8: Ring-shaped conductor, 9: Capacitor,
10: resonance circuit, 11: support part,
12: Spring, 13, 13A: Center maintaining plate,
14: Guide member, 15: Bottom plate,
16: Pick piece, 17: Support piece,
18: Guide hole, 19: Guide groove,
20: support part, 21: center maintaining plate body,
22: Support bar, 23: Recess,
24: connecting plate, 25: ridge,
26: Stopper piece, 27: Detector,
28: Hole, 29: Drilling jig,
30: Opening part, 31: Support part.

Claims (2)

A disk-shaped sensor support that can be housed in a ventilation duct embedded in the wall of the building so as to have play, and a condenser that is attached so that the center coincides with the sensor support. A ring-shaped resonance circuit as a sensor and a portion near the center of the sensor support body are slidably mounted in the radial direction, and are supported at approximately 120 degree intervals on the inner wall surface of the ventilation duct. A center maintaining plate that is provided with a support portion at a portion near the center and both ends, and is provided with an elastic force in the normally expanding direction, and the center maintaining plate formed at a portion near both ends of the center maintaining plate The ventilating duct detector according to claim 1, wherein a support part at a position near the center and both ends of the sensor comprises a guide member that guides on a center circumference of the sensor support. A shallow dish-shaped sensor support body having a cylindrical peripheral wall that can be stored in a ventilation duct embedded in the wall surface of the building so as to have play, and a capacitor attached to the inner wall surface of the sensor support body And a ring-shaped resonance circuit provided with a ring-shaped resonance circuit, and a portion near the center portion attached to the sensor support body so as to be slidable in the radial direction. A center maintaining plate that is provided with an elastic force in the expansion direction at all times by a spring having support portions formed in the central portion and portions near both ends, and the center formed in the portions near both ends of the center maintaining plate. A ventilating duct detector according to the present invention, characterized in that the central portion of the maintenance plate and the support portions near the both ends are formed of a guide member that guides the circumference of the center of the sensor support.

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