JP5379260B2 - Detection device for magnetic materials such as studs - Google Patents

Description

  The present invention relates to a detection apparatus that can easily detect a magnetic material striking a pillar, a stud, etc. hidden behind a wall surface or a ceiling using a magnet.

  In recent constructions of houses, etc., inter-columns are provided between the main columns, plasterboards, etc. are fixed between the columns with nails or screws, and a decorative cloth is applied on top of them to finish the wall surface. Yes. When attaching a device such as an air conditioner to this wall or attaching a watch or forehead, it is necessary to drive nails or screws directly into the pillar hidden inside due to strength problems. It was extremely difficult to tell the location of the pillars behind.

  Therefore, as the most primitive method, the change of sound when hitting the wall with a hand or a hammer is recognized and the existence of a pillar behind is also confirmed, but there is a thickness of plasterboard etc. In the case of using wall materials, it took skill to recognize the change in the sound.

  For this reason, as shown in Patent Document 1, for example, a detector that uses the fact that the dielectric constant varies depending on whether or not there is a pillar behind the wall has been used in recent years. This is because an electric field is generated by an electrode plate that moves along the wall, a change in dielectric constant is captured by the electrode plate as a change in capacitance, and if there is a change in capacitance, a light emitting diode or the like is illuminated, It is determined that there is a pillar at that position.

  Further, as a simpler one, for example, as disclosed in Patent Documents 2 and 3, a magnet is known. In these cases, the presence of iron such as a nail or a screw fixing a gypsum board, that is, the presence of a magnetic material is detected using a magnet, and it is determined that there is a column in the portion by the movement of the magnet.

Japanese Patent Publication No. 7-46142 Japanese Patent Publication No.54-35504 Japanese Patent Laid-Open No. 10-48343

  However, an apparatus for detecting a change in dielectric constant as shown in Patent Document 1 has a complicated structure and is expensive, is generally used for business purposes, and is difficult for an individual to use. On the other hand, since magnets are relatively simple in structure and can be manufactured at low cost, they can be owned by individuals and are widely used.

  The above-described detection device using a magnet generally employs a structure in which a bar-shaped magnet swings like a pendulum, and a metal base hidden behind a wall, or a head such as a nail or screw. The magnet reacts to this, and the movement of the magnet is visually confirmed to determine its position. That is, a single magnet is usually used and the reaction to a single nail or screw is observed. However, since nails and screws are driven at a considerable distance from each other, in order to find the head of a single nail or screw, first, the detection device is used by tracing the wall surface vertically and horizontally. It was necessary to see the reaction of the time from time to time, and it was an extremely troublesome task. Furthermore, in order to know the interval between the studs, it was necessary to repeat the same operation.

  The present invention solves such a problem, by using a plurality of magnets to search a wall surface over a wide area at a time, detecting a magnetic material such as a nail, and simultaneously detecting the position and interval of a stud, etc. It is a thing.

  In order to solve the above-mentioned problems, the present invention is a horizontally long front plate and a back plate having a predetermined vertical width as a detecting device for a magnetic body such as a stud, and at least the front plate is transparent. The internal space of the case, which is configured by sealing the four sides, is used as a flat magnet storage part. In this storage part, a plurality of flat magnets with magnetism in the front and back directions have the same polarity on the front surface (back surface). We adopted a means of storing them at a distance from each other.

  And the storage part of this flat magnet had a vertical width a little larger than the magnitude | size of the said flat magnet to store, and the said flat magnet shall be movable to a surface direction.

  According to this configuration, when the detection device is moved along the wall surface, the flat plate magnet reacts to a magnetic body such as a screw on the wall surface, and only the flat plate magnet in the portion with the screw moves in the direction of the screw in the storage portion. Thus, the presence of a screw, that is, the presence of a stud is detected.

  Moreover, it is preferable that each flat magnet is circular.

  Furthermore, the means of providing a scale on one side or both sides in the length direction of the front plate and / or the back plate was adopted.

  Using this scale as a guide, mark the wall surface and check the position and spacing of the studs.

  The present invention describes the case where the wall surface is applied to this as a representative example in the description in the text, but it goes without saying that it can also be used on, for example, the floor surface, etc., provided that the function of the present invention described is exerted. Yes.

  The magnetic body detecting device such as a stud according to the present invention having the above configuration has a magnetic material such as a screw on the wall surface by storing a plurality of flat magnets side by side in a long transparent case and moving the magnet along the wall surface. In this case, since it is possible to detect the position of a magnetic body such as a screw by confirming that only the flat magnet moves only in that portion, the wall surface can be detected at a time corresponding to the length of the device at a time. It is expected that an excellent effect that the position of the screw over a wide range, that is, the position and interval of the studs can be detected at the same time by one operation.

  Therefore, as compared with the conventional one using a single magnet, the working efficiency is greatly increased and the detection accuracy is also improved.

  Furthermore, since it can be composed of only a transparent case and a plurality of flat plate magnets and has an extremely simple structure, it can be manufactured at low cost and can be widely spread.

  Furthermore, it can be used by anyone with an extremely simple operation and can easily detect the studs.

BRIEF DESCRIPTION OF THE DRAWINGS Embodiment of the detection apparatus of magnetic bodies, such as a stud which concerns on this invention, (A) is the front view, (B) is a bottom view, (C) is the elements on larger scale of (A). (A) is a perspective view showing the detection device with a part cut away, and (B) is an explanatory view of the arrangement of flat magnets to be housed. It is explanatory drawing of the usage method of this detection apparatus.

  Hereinafter, preferred embodiments of a detection device for a magnetic body such as a stud according to the present invention will be described with reference to the accompanying drawings.

  1 and 2, reference numeral 1 denotes a hollow case made of a transparent plate. That is, it comprises a horizontally long front plate 1a and a back plate 1b having a predetermined vertical width, and narrow side plates 1c, 1c,... Sandwiched along the respective four sides, and the four sides are side plates 1c. A flat magnet storage portion 1d is formed in the internal space sealed in step (b). Although the length is not particularly limited, since the interval between the spacers is generally set to 455 mm, it is preferable to make the length about 500 mm slightly longer than that. It should be noted that at least the front plate 1a only needs to be transparent and the back plate need not be transparent. However, if both plates are transparent, they can be used without considering the front and back.

  2, 2... Are a large number of flat magnets housed in the housing 1d of the case 1, each having magnetism in the front and back directions. For example, as shown in FIG. Is the S pole. The number thereof is not particularly limited, but for example, the number is arranged so that the mutual interval is about 50 mm. The flat magnets 2 are stored side by side in the storage portion 1d so that the polarities of the front surfaces (back surfaces) of all the flat plate magnets 2 that are stored are the same (for example, N poles). The size is smaller than the vertical width of the portion 1d so that the inside of the storage portion 1d can be freely moved in the surface direction. Therefore, the flat magnets 2 are not attracted to each other, and are arranged at equal intervals in the storage portion 1d while repelling each other. The shape of the magnet is not particularly limited, but is preferably circular as shown.

  Reference numeral 3 denotes a scale provided on one side or both sides of the length direction of the case 1, and is used as a guideline for knowing the position and interval of the studs by marking the wall surface using this scale.

  Next, a method of using this detection device will be described with reference to FIG. Basically, the apparatus is used in such a manner that the apparatus is held horizontally horizontally and moved up and down along the wall surface.

  In general construction, since the studs (H) are provided in the vertical direction, the screws (S) for stopping the gypsum board (B) are also arranged at equal intervals in the vertical direction. Further, since the interval between the studs is the same, the screws (S) are also arranged at equal intervals in the horizontal direction. Since the screw (S) is usually made of a magnetic material such as iron, the magnet is attracted. Therefore, when the detection device is moved from the bottom to the top along the wall surface, the flat magnets 2, 2,. And it is lined up horizontally along the lower side. When the detection device approaches the part with the screw (S), only a part of the flat magnet 2 near the screw (S) is attracted to the head of the screw (S) and moves upward against the gravity. (State shown). Therefore, it is detected that the head of the screw (S) is present in the moving direction of the flat magnet 2, and it is possible to detect the presence of the stud (H) on the back side of the part. Actually, by moving the detection device little by little vertically and horizontally at the detection portion, the exact position of the screw (S) can be detected by looking at the movement of the flat magnet 2. Then, the detected position is marked with a pencil or the like using the scale 3. In this case, since the detection device is used horizontally, a plurality of plate magnets 2 react and move at a predetermined interval. Thereby, the interval between the studs can be detected at the same time.

  Therefore, according to the present detection device, since the predetermined width can be detected at a time, unlike the conventional case, it is possible to know the positions and intervals of the studs at the same time, which is very convenient. In addition, the structure is simple and anyone can easily operate.

  The apparatus of the present invention can be applied to the wall surface described in the embodiment, and can also be used for detecting a magnetic material on a floor surface or the like on the condition that the function is exerted, and the application range is wide.

DESCRIPTION OF SYMBOLS 1 Case 1a Front plate 1b Back plate 1c Side plate 1d Storage part 2 Flat magnet 3 Scale

Claims (4)

  An internal space of a case formed by sealing the four sides of a horizontally long front plate and a back plate having a predetermined vertical width and at least the front plate is transparent is used as a flat magnet storage unit. An apparatus for detecting a magnetic material such as a stud, wherein a plurality of flat magnets having magnetism in the front and back directions are housed in the section with a space between each other so that the polarities of the front surface (back surface) are all the same.   2. A device for detecting a magnetic body such as a stud, according to claim 1, wherein the storage portion of the flat magnet has a vertical width slightly larger than the size of the flat magnet to be stored, and the flat magnet is movable in the surface direction.   The apparatus for detecting a magnetic material such as a stud, according to claim 1 or 2, wherein each flat magnet is circular.   The detection apparatus of magnetic bodies, such as a pillar, of any one of Claims 1-3 which provided the scale in the one side or both sides of the length direction of a surface board or / and a back surface board.

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