JP7326181B2 - Position search method for long materials - Google Patents

Description

INDUSTRIAL APPLICABILITY The present invention is applied to a building in which long members that support the face member are arranged side by side on the back side of the face member. The present invention relates to a method of searching for the position of a length of material.

Buildings such as houses are provided with various surface materials such as floor materials, ceiling materials, and wall materials. A backing material for supporting the face material is provided on the back side of the face material. The base material has a plurality of elongated materials arranged at predetermined intervals.

In a building, processing such as perforation processing may be applied to the face material due to renovation or the like. In this case, it is necessary to process the face material at a position avoiding the elongated material arranged on the back side of the face material. Therefore, when processing the face material, it is necessary to confirm in advance the arrangement position where the elongated material is arranged.

Since the long material is provided on the back side of the face material, it is necessary to remove the face material to confirm the position of the long material. However, the task of removing the face material requires a great deal of labor. Therefore, Patent Literature 1 proposes a method of searching for long metal braces arranged on the back side of a facing material from the front side of the facing material using an electromagnetic induction type searching device. According to the method disclosed in Patent Document 1, the position of the elongated member can be confirmed without removing the face member, so that the position of the elongated member can be confirmed relatively easily.

Japanese Patent Application Laid-Open No. 2010-60402

However, since the method of Patent Literature 1 uses electromagnetic induction, it cannot search unless the long material to be searched is made of metal that responds to magnetism. In addition, if there is a metal member that responds to magnetism around the long material, there is a risk that the member will be mistakenly searched for as a long material. Can not do it.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and the main object of the present invention is to provide a method for searching the position of a long material that can suitably search for the position of the long material arranged on the back side of the face material. It is intended.

In order to solve the above problems, a method for searching for the position of a long member according to a first aspect of the present invention is provided in a building in which a plurality of long members supporting the face member are arranged side by side at predetermined intervals on the back side of the face member. A method for searching the position of the elongated material, which is applied and searches for the position of the elongated material from the surface side of the face material using a search tool, wherein the face material has the elongated material and the elongated material in the thickness direction There is an overlapping portion that overlaps and a non-overlapping portion that does not overlap with the elongated material, and the searching tool resonates when vibration of the same frequency as the predetermined natural frequency of the overlapping portion is applied. An arranging step of arranging the searching tool having a vibrating body in contact with the surface of the face material, and applying an impact to the face material in the arrangement state of the searching tool in the arranging step. a vibration generation step of generating vibration in the surface material; and confirmation of confirming whether or not the vibrator of the search tool placed on the surface material resonates due to the vibration generated in the surface material by the vibration generation step. and searching for the position of the elongated member based on the position of the searching tool on the face member when resonance of the vibrating body is confirmed in the confirming step.

In a configuration in which a plurality of elongated members are arranged side by side on the back side of the facing member, the facing member has an overlapping portion that overlaps with the elongated member and a non-overlapping portion that does not overlap with the elongated member. In such a configuration, when the face material vibrates, it is considered that the overlapping part has a higher natural frequency than the non-overlapping part due to the overlapping relationship with the long material.

Further, in the case where a panel having a face member and a plurality of elongated members is standardized in advance, the natural frequencies of the overlapping and non-overlapping portions of the face members in the panel become clear. Therefore, in such a case, if a standardized panel is prepared at a factory or the like, the natural frequency of the overlapping portion and the non-overlapping portion can be obtained in advance by performing a vibration test or the like using the panel. .

Therefore, in the first invention, in view of such a point, the natural frequency of the overlapping portion of the face material in the building to be searched is obtained in advance, and the same frequency as the obtained natural frequency of the overlapping portion The position of the elongated material is searched using a searching tool having a vibrating body that resonates when the vibration is applied.

When searching for the position of a long material using a search tool, first, the search tool is placed in contact with the surface of the face material, and the face material is vibrated by applying an impact to the face material in that state. give rise to In this case, the vibrating body of the searching tool arranged on the face material vibrates due to the vibration generated in the face material. Here, when the searching tool is arranged in the overlapping portion of the surface material, the vibrating body resonates because vibration is applied to the vibrating body at the natural frequency of the overlapping portion. On the other hand, when the searching tool is arranged in the non-overlapping portion of the surface material, the vibration is applied to the vibrating body at the natural frequency of the non-overlapping portion, so that the vibrating body does not resonate.

Therefore, after vibrating the face material, it is confirmed whether or not the vibrating body resonates due to the vibration generated in the face material. In this case, if the resonance of the vibrator is confirmed by this confirmation, it means that the search tool is arranged in the overlapping portion of the face material. Therefore, in this case, the position of the search tool on the surface material is the same as the position of the long material in the direction in which the long materials are arranged. Therefore, in this case, it is possible to search (identify) the position of the elongated material based on the position of the search tool on the face material.

According to the position search method described above, the position of the long material can be searched for regardless of the material of the long material. Therefore, even if the long material is not made of metal, the position of the long material can be searched. In addition, the position of the elongated material can be searched regardless of the materials of the members existing around the elongated material. Therefore, it is possible to search for the position of the long material even if there are metal members around the long material. Therefore, from the above, the position of the elongated material can be preferably searched from the surface side of the face material.

A method for searching the position of a long material according to a second aspect of the invention is the first aspect, wherein the searching tool is a first searching tool having a first vibrating body as the vibrating body, and the first searching tool and the first 2 search tools, wherein the second search tool has the same frequency as the natural frequency of the non-overlapping portion obtained in advance. a second vibrating body that resonates when a vibration of is applied, and in the arranging step, the first searching tool and the second searching tool are arranged at the same position in the direction in which the long materials are arranged, and the surface material In the vibration generation step, vibration is generated in the face material in the arrangement state of each searching tool in the placement step, and in the confirmation step, the face material is vibrated confirming whether or not the first vibrating body and the second vibrating body of each of the searching tools arranged on the surface material resonate due to vibration, and confirming the resonance of the first vibrating body in the confirming step; The position of the long material is searched based on the positions of the search tools on the face material when resonance of the second vibrating body is not confirmed.

In the second invention, a second searching tool is used in addition to the first searching tool. The second searching device comprises a second vibrating body that resonates when vibrated at the same frequency as the pre-determined natural frequency of the non-overlapping portion. When searching for the position of the long material using the first search tool and the second search tool, each of these search tools is placed in contact with the surface of the face material at the same position in the direction in which the long material is arranged. Then, an impact is applied to the face material in the arranged state to cause the face material to vibrate. In this case, the vibrating bodies of the search tools arranged on the face material vibrate due to the vibration generated in the face material. Here, when each searching tool is arranged in an overlapping portion of the surface material, the first vibrating body of the first searching tool resonates, while the second vibrating body of the second searching tool does not resonate. . Further, when each searching tool is arranged in a non-overlapping portion of the surface material, the second vibrating body of the second searching tool resonates, while the first vibrating body of the first searching tool does not resonate. .

Therefore, after causing the face material to vibrate, it is confirmed whether or not the first vibrating body and the second vibrating body respectively resonate due to the vibration. By this confirmation, if the first vibrating body resonates and the second vibrating body does not resonate, it means that the searching tools are arranged in overlapping portions of the face material. In this case, it is possible to search for the position of the elongated material based on the position of each search tool on the face material. In this position searching method, since the position of the elongated material is searched using two types of vibrating bodies having different natural frequencies, it is possible to more reliably search (specify) the position of the elongated material. Become.

A method for searching for the position of a long material according to a third aspect of the invention is characterized in that, in the first or second aspect, the searching tool comprises a support and a diaphragm as the vibrating body cantilevered on the support. characterized in that, in the arranging step, the searching tool is arranged in a state in which the support portion is in contact with the surface of the face member.

According to the third invention, the searching tool is configured to have a support portion and a vibration plate cantilevered by the support portion. In this case, the projection dimension of the diaphragm projecting from the supporting portion depends on the natural frequency of the diaphragm. Therefore, it is possible to set the natural frequency of the diaphragm to the same frequency as the natural frequency of the overlapping portion by adjusting the extension dimension. This makes it relatively easy to obtain the search tool.

A fourth aspect of the present invention is a method for searching for the position of a long member, which is applied to a building in which a plurality of long members supporting the member are arranged at predetermined intervals on the back side of the member. A method of searching for the position of a long material from the surface side using a pair of search tools, wherein each of the search tools is arranged in a predetermined direction and has a plurality of different natural frequencies. and an arrangement step of arranging each of the search tools in contact with the surface of the face member in a direction in which the respective vibrators are aligned in the longitudinal direction of the elongated member. and in the arranging step, the searching tools are arranged so that the intervals between the searching tools on the face member are smaller than the predetermined interval in the direction in which the long materials are arranged, and the arranging is performed. a vibration generation step of applying an impact to the surface material to generate vibration in the surface material in the arranged state of each of the searching tools according to the step; Which one of the vibrating bodies resonates in each of the arranged searching tools is specified as a resonant vibrating body, and the resonant vibrating bodies of the specified searching tools have different natural frequencies. and a confirmation step of confirming whether or not each of the resonance oscillators has a different natural frequency. The position of the elongated member is searched based on the position of the search tool having a resonant vibrating body with a higher natural frequency among the vibrating bodies on the surface member.

In a configuration in which a plurality of long members are arranged side by side on the back side of the face member, it is assumed that the natural frequency of the overlapping portion (and non-overlapping portion) of the face member is unknown. In that case, the position searching method of the first invention, in which the position of the elongated material is searched for using a vibrating body that resonates at the natural frequency of the overlapping portion, cannot construct a searching tool having such a vibrating body. , as a result, it is impossible to search for the position of the elongated material. Therefore, in the fourth invention, a search tool different from the first invention is used to search for the position of the long material so that the position of the long material can be searched even when the natural frequency of the overlapping portion is unknown. I have to.

In the fourth invention, a pair of search tools are used as search tools. Each of these search tools is configured with a plurality of vibrating bodies having different natural frequencies. In this case, in each searching tool, a vibrating body having the same natural frequency as that of the overlapping portion (in other words, a vibrating body that resonates at the natural frequency of the overlapping portion) and a natural vibration of the non-overlapping portion vibrating bodies having the same natural frequency as the number (in other words, vibrating bodies that resonate at the natural frequency of the non-overlapping portion).

When searching for the position of the elongated material using each of the search tools described above, first, each of the search tools is brought into contact with the surface of the face material such that each vibrating body is aligned in the longitudinal direction of the elongated material. to place. In this arrangement, the searching tools are arranged so that the spacing between the searching tools on the surface material is smaller than the spacing (predetermined spacing) between the long materials in the direction in which the long materials are arranged. When the search tools are arranged on the face in this manner, either all of the search tools are arranged in non-overlapping portions of the face, or one of the search tools is arranged in the overlapping portion of the face and the other is arranged in the overlapping portion of the face. will be placed in the non-overlapping portion. Hereinafter, the pattern in which the search tools are arranged in the former manner will be referred to as the first arrangement pattern, and the pattern in which the search tools will be arranged in the latter manner will be referred to as the second arrangement pattern.

After arranging each searching tool on the face material, an impact is applied to the face material while the face material is arranged, thereby causing the face material to vibrate. As a result, the vibrating bodies of the search tools arranged on the face material vibrate due to the vibration generated in the face material. Here, when each search tool is arranged on the panel in the first arrangement pattern, that is, when each search tool is arranged in a non-overlapping portion, each search tool has a unique non-overlapping portion. A vibrating body having the same natural frequency as the vibration frequency will resonate. Therefore, in this case, vibrating bodies having the same natural frequency resonate in each searching tool.

On the other hand, if the search tools are arranged on the panel in a second arrangement pattern, that is, if one of the search tools is arranged in the overlapping portion and the other is arranged in the non-overlapping portion, In one of the search tools, a vibrating body having the same natural frequency as the natural frequency of the overlapping portion resonates, and in the other searching tool, a vibrating body having the same natural frequency as the natural frequency of the non-overlapping portion will resonate. Therefore, in this case, vibrating bodies having different natural frequencies resonate in each searching device.

Therefore, in view of the above points, after vibrating the face material, a resonant vibrating body that resonates among the plurality of vibrating bodies in each search tool arranged on the face material by the vibration is specified, and each specified search It is confirmed whether or not the resonant vibrating bodies of the tools have different natural frequencies. By this confirmation, it can be grasped that the search tools are arranged in the second arrangement pattern on the face material when the resonant vibrators of the search tools have different natural frequencies. That is, in this case, it can be understood that one of the search tools is arranged in the overlapping portion of the face material.

Here, in the face material, the natural frequency of the overlapping portion is higher than the natural frequency of the non-overlapping portion. Therefore, when the search tools are arranged in the second arrangement pattern, the search tool has a resonant oscillator with a higher natural frequency among the resonant oscillators that resonate in each search tool (hereinafter referred to as the natural frequency The searching tool on the high side) is arranged in the overlapping portion of the face material, and the searching tool having the resonant vibrating body on the low natural frequency side is arranged in the non-overlapping portion of the face material. Therefore, in this case, the position of the search tool on the side of the surface material with the higher natural frequency is the same as the position of the long material in the direction in which the long materials are arranged. Therefore, in this case, it is possible to search for the position of the elongated material based on the position of the search tool.

According to the position searching method described above, as in the position searching method of the first invention, regardless of the material of the elongated member and the material of the members existing around the elongated member, the position of the elongated member can be explored. Therefore, the position of the elongated material can be suitably searched from the surface side of the face material. Further, in the position searching method described above, even if the natural frequencies of the overlapping portion and the non-overlapping portion are unknown, it is possible to suitably search for the position of the elongated material.

A method for searching for a position of a long material according to a fifth aspect of the invention is the method according to the fourth aspect, wherein each of the searching tools has an elongated support extending in the predetermined direction, and the support has a A plurality of cantilever-supported diaphragms are respectively provided as the vibrating bodies, and in the arranging step, when the respective searching tools are arranged on the surface member, the supporting bodies of the respective searching tools are aligned with the long lengths of the supporting bodies. The supports are arranged in contact with the surface of the face member in the direction extending in the longitudinal direction of the material, and the distance between the supports of the search tools in the arrangement direction of the elongated materials is the above. The diaphragms are arranged at intervals different from the predetermined interval, and in each of the search tools, the diaphragms project from the supporting body with different projecting dimensions, and the difference makes the diaphragms unique to each other. It is characterized in that the frequencies are different from each other.

According to the fifth invention, each searching tool is configured to have an elongated support and a plurality of diaphragms cantilevered on the support. When each searching tool is arranged on the face member, the support of each searching device is arranged in a direction extending in the longitudinal direction of the elongated member, and in a state in which each of the supporting members is in contact with the face member. Further, each diaphragm is cantilever-supported by a support, and the projection dimension from the support is different from each other. Due to the difference in the extension dimension, the respective diaphragms have different natural frequencies. In this case, by adjusting the extension dimension of each diaphragm, each diaphragm having a different natural frequency can be obtained. Therefore, the searching tool of the fourth invention can be obtained relatively easily.

In addition, when confirming whether or not the diaphragms (resonant oscillators) that resonate in each searching tool have mutually different natural frequencies, it is confirmed by comparing the projecting dimensions of the resonant oscillators. be able to. Therefore, there is also the advantage that such confirmation can be facilitated.

A method for searching the position of a long material according to a sixth aspect of the invention is characterized in that, in the fourth or fifth aspect, in each of the searching tools, each of the vibrating bodies moves from one side to the other side in the predetermined direction. They are arranged in order such that the natural frequency becomes higher, and in the arrangement step, when arranging each of the searching tools on the surface material, each of the searching tools is arranged from one side in the longitudinal direction of the elongated material to the other side. It is characterized by arranging the vibrating bodies oriented in the same order.

According to the sixth invention, in each searching tool, each vibrating body is arranged in order of the height of the natural frequency. When each searching tool is arranged on the surface material, each searching tool is arranged so that the vibrating bodies are arranged in the same order from one side to the other in the longitudinal direction of the elongated material. be. In this case, in each searching tool, since the height order of the natural frequencies of the vibrating bodies from one side to the other in the longitudinal direction is the same, the resonant vibrating bodies of the searching tools have different natural vibrations. When confirming whether or not an object has a number, the confirmation can be facilitated.

FIG. 2 is a perspective view showing the configuration of building units that constitute a unit-type building; FIG. 4 is a longitudinal sectional view showing the configuration of the floor of the building unit; FIG. 2 is a perspective view showing the configuration of each searching tool in the first embodiment; The figure for demonstrating the position searching method of a floor beam. The figure for demonstrating the position searching method of a floor beam. The perspective view which shows the structure of the searching tool in 2nd Embodiment. The figure for demonstrating the position searching method of a floor beam. The figure which shows the structure of the searching tool in other embodiment.

[First Embodiment]
An embodiment embodying the present invention will be described below with reference to the drawings. In this embodiment, the present invention is embodied as a method for searching the position of floor beams arranged side by side on the back side of the floor surface material in the floor of a unit-type building. First, the configuration of the floor of the unit building will be described below with reference to FIGS. 1 and 2. FIG. FIG. 1 is a perspective view showing the configuration of a building unit that constitutes a unit-type building, and FIG. 2 is a longitudinal sectional view showing the configuration of the floor of the building unit. Although not shown, the unit-type building is constructed by combining a plurality of rectangular parallelepiped building units with each other.

As shown in FIG. 1, the building unit 20 includes four pillars 21 arranged at its four corners, and four ceiling girders 22 and four floor girders 23 connecting the upper end and lower end of each pillar 21, respectively. and In the building unit 20, the columns 21, the ceiling girders 22, and the floor girders 23 form a rectangular parallelepiped skeleton (frame). The pillar 21 is made of rectangular steel in the shape of a square cylinder. The ceiling girders 22 and the floor girders 23 are made of channel steel with a U-shaped cross section, and are installed so that their openings face each other.

Between the ceiling girders 22 on the long side facing each other, a plurality of ceiling girders 25 are bridged at predetermined intervals (more specifically, equal intervals). In addition, a plurality of small floor beams 26 are bridged at predetermined intervals (specifically, equal intervals) between the floor girders 23 on the long side facing each other. For example, the ceiling girders 25 are made of lip channel steel and the floor girders 26 are made of square steel. A ceiling panel member 27 is supported from above by the ceiling girders 25, and a floor panel member 28 is supported by the floor girders 26 from below.

Next, the configuration of the floor of the building unit 20 will be described.

As shown in FIG. 2, on the floor of the building unit 20, a plurality of floor beams 26 are arranged side by side in parallel. The top surfaces of these small floor beams 26 are set at the same height position. A floor surface material 28 is provided on the upper surface of each floor joist 26 . The floor material 28 is provided in a state of being placed on the upper surface of each small floor beam 26 . The floor material 28 is made of particle board and fixed to the small floor beams 26 with screws or the like. Note that the floor beam 26 corresponds to a long member, and the floor member 28 corresponds to a face member. Further, a floor panel is configured by having the floor surface material 28 and each floor joist 26 .

An underfloor heat insulating material 29 is provided on the lower surface side (rear surface side) of the floor material 28 . The underfloor heat insulating material 29 is composed of a fiber heat insulating material such as glass wool or a foam heat insulating material such as urethane foam. there is The underfloor heat insulating material 29 is formed in a plate shape having a predetermined thickness, and is arranged between the adjacent floor small beams 26 .

The floor member 28 includes an overlapping portion 28a that overlaps the small floor beam 26 in its thickness direction and a non-overlapping portion 28b that does not overlap the small floor beam 26. - 特許庁The overlapping portions 28a and the non-overlapping portions 28b alternately exist in the beam alignment direction in which the small floor beams 26 are aligned. The floor panel 28 is fixed to the floor girders 26 at each overlapping portion 28a.

Here, when the floor member 28 vibrates due to an impact or the like, the overlapping portion 28a and the non-overlapping portion 28b may vibrate at different frequencies (natural frequencies). Specifically, since the overlapping portion 28a overlaps the small floor beam 26, it is considered that the rigidity is higher than that of the non-overlapping portion 28b. It is thought that vibration occurs at a certain number (eigenfrequency). That is, it is considered that the overlapping portion 28a has a higher natural frequency during vibration than the non-overlapping portion 28b.

Therefore, in the present embodiment, focusing on the difference in natural frequency between the overlapping portion 28a and the non-overlapping portion 28b, the position of the floor beam 26 is determined using a search tool having a vibrating body. I plan to explore. Therefore, a method for searching the position of the floor beam 26 using such a searching tool will be described below. In this embodiment, two types of searching tools 30 and 40 are used as searching tools, and the configuration of each of the searching tools 30 and 40 will first be described below with reference to FIG. 3 is a perspective view showing the configuration of each of the searching tools 30 and 40. As shown in FIG. Further, each of the searching tools 30 and 40 has basically the same configuration, and therefore the configuration of each of the searching tools 30 and 40 will be collectively described below.

As shown in FIG. 3, each of the search tools 30 and 40 has a support portion 31 and 41 and a diaphragm 32 and 42 cantilevered on the support portion 31 and 41 . The support portions 31 and 41 are formed in a rectangular parallelepiped shape by steel square bars, and in this embodiment, the support portions 31 and 41 have the same configuration (size and shape). Note that the support portions 31 and 41 may be made of other materials such as wood or resin.

The diaphragms 32 and 42 are made of flat steel plates with a small thickness, and are formed in a strip shape. The vibration plates 32 and 42 are fixed to the support portions 31 and 41 by screws 33 and 43 at one ends in the longitudinal direction. The diaphragms 32 and 42 are fixed to the support portions 31 and 41 with their longitudinal directions orthogonal to the longitudinal directions of the support portions 31 and 41 . In addition to the screws 33, 43, the diaphragms 32, 42 may be fixed to the supports 31, 41 using double-sided tape or an adhesive in order to increase the fixing strength to the supports 31, 41.

The diaphragms 32 and 42 are provided with the other ends in the longitudinal direction protruding from the support portions 31 and 41 . In this case, the diaphragms 32 and 42 are provided in a cantilevered state with respect to the support portions 31 and 41, so that the other end side (free end side) projecting from the support portions 31 and 41 can vibrate in the thickness direction. (swingable).

The diaphragms 32 and 42 have the same width (specifically, the length in the lateral direction), but have different lengths (specifically, the length in the longitudinal direction). The length of the diaphragm 32 is shorter than the length of the diaphragm 42, so that the projection dimension H1 of the diaphragm 32 from the support portion 31 is larger than the projection dimension H2 of the diaphragm 42 from the support portion 41. is also shorter (H1<H2).

Since the overhang dimension H1 of the diaphragm 32 is shorter than the overhang dimension H2 of the diaphragm 42, the natural frequency E1 of the diaphragm 32 is higher than the natural frequency E2 of the diaphragm 42 ( E1>E2). Specifically, the natural frequency E1 of the diaphragm 32 is set to the same value as the natural frequency Ea of the overlapping portion 28a of the floor material 28, and the natural frequency E2 of the diaphragm 42 is set to the non-overlapping portion 28b of the floor material 28. is set to the same value as the natural frequency Eb of .

Here, in this building, the floor panel having the floor surface material 28 and each floor joist 26 is standardized in advance with a certain size. In such a standardized floor panel, the natural frequency of the overlapping portion 28a and the natural frequency of the non-overlapping portion 28b are clearly defined. Therefore, in the present embodiment, this standardized floor panel is prepared in a factory, and a vibration test is performed on the floor panel to determine the natural frequency Ea of the overlapping portion 28a and the natural frequency Eb of the non-overlapping portion 28b. is requested in advance. Then, the projecting dimension H1 of the diaphragm 32 is adjusted so that the natural frequency Ea of the overlapping portion 28a and the natural frequency E1 of the diaphragm 32 obtained in this way are the same, and the searching tool 30 is constructed. there is Similarly, the projecting dimension H2 of the diaphragm 42 is adjusted so that the obtained natural frequency Eb of the non-overlapping portion 28b and the natural frequency E2 of the diaphragm 42 are the same, and the search tool 40 is moved. Configure.

In determining the natural frequencies of the overlapping and non-overlapping parts by the vibration test of the floor panel, for example, the vibration acceleration of the floor surface material is measured by an accelerometer in each of the overlapping and non-overlapping parts. It is conceivable to obtain the natural frequency of the overlapping portion and the non-overlapping portion by performing frequency spectrum analysis of the vibration acceleration.

Further, in this embodiment, the diaphragm 32 corresponds to the first vibrating body, and the diaphragm 42 corresponds to the second vibrating body. Further, the searching tool 30 corresponds to the first searching tool, and the searching tool 40 corresponds to the second searching tool.

Next, FIG. 4 and FIG. 5 show a method for searching the position of the floor beam 26 from the surface side (upper surface side) of the floor material 28 using the search tools 30 and 40 described above. I will explain based on. 4 and 5 are diagrams for explaining a method of searching for the position of the floor beam 26. FIG. 4 shows a state in which the search tools 30 and 40 are arranged on the non-overlapping portion 28b of the floor member 28, and FIG. 28a is shown. Also, when searching for the position of the small floor beam 26, it is assumed that the direction in which the small floor beams 26 are arranged is known in advance. Therefore, it is assumed that the longitudinal direction of each small floor beam 26 orthogonal to the beam alignment direction is also known in advance.

When searching for the position of the floor beam 26 using the search tools 30 and 40, first, the search tools 30 and 40 are placed on the floor material 28 as shown in FIG. An arrangement step of arranging is performed. In this placement step, the search tools 30 and 40 are placed on the surface (upper surface) of the floor member 28 (in other words, in contact) so that the search tools 30 and 40 are placed. It is placed on the floor material 28 . Also, during this arrangement, the support portions 31 and 41 of the search tools 30 and 40 are placed on the floor member 28 at the same position in the beam alignment direction. As a result, the support portions 31 and 41 are arranged side by side in the longitudinal direction of the floor beam 26 .

In the placement step, the support portions 31 and 41 of the search tools 30 and 40 are placed on the floor member 28 so that their longitudinal directions are the same as the longitudinal directions of the floor beams 26 . In this case, the support portions 31 and 41 have a width smaller than the width of the small floor beam 26 in such a placed state. In addition, the diaphragms 32 and 42 of the search tools 30 and 40 are spaced upward from the floor member 28 by the placement process, so that they can vibrate up and down.

In addition, in the arrangement step, the support portions 31 and 41 may be temporarily fixed to the surface of the floor member 28 using double-sided tape.

After the arranging step, a vibration generation step is performed to generate vibration in the floor member 28 by applying an impact to the floor member 28 with the search tools 30 and 40 arranged on the floor member 28 (Fig. 4 ( b), etc.). In the vibration generation process, vibration is generated by applying an impact force F to the floor material 28 from the surface side of the floor material 28 with a hand or foot. 4(b) and 4(c) both show the impact force F. (The same applies to FIGS. 5(b) and 5(c)). Moreover, when applying impact to the floor surface material 28, a tool such as a plastic hammer may be used to apply the impact.

When the floor material 28 is vibrated by the vibration generation process, the overlapping portion 28a of the floor material 28 vibrates at the natural frequency Ea, and the non-overlapping portion 28b vibrates at the natural frequency Eb. Further, the vibrations generated in the floor member 28 vibrate the diaphragms 32 and 42 of the search tools 30 and 40 arranged on the floor member 28, respectively.

Here, as shown in FIG. 4(a), when the search tools 30 and 40 are arranged in the non-overlapping portion 28b of the floor member 28, the natural frequency Eb of the non-overlapping portion 28b Vibration is applied to the diaphragms 32 and 42 . In this case, the diaphragm 42 having the same natural frequency E2 as the natural frequency Eb of the non-overlapping portion 28b resonates (see FIG. 4(c)), and the natural frequency E1 different from the natural frequency Eb of the non-overlapping portion 28b resonates. will not resonate (see FIG. 4(b)).

On the other hand, as shown in FIG. 5(a), when the search tools 30 and 40 are arranged in the overlapping portion 28a of the floor member 28, each diaphragm 32 vibrates at the natural frequency Ea of the overlapping portion 28a. , 42 will be oscillated. In this case, the diaphragm 32 having the same natural frequency E1 as the natural frequency Ea of the overlapping portion 28a resonates (see FIG. 5B) and has a natural frequency E2 different from the natural frequency Ea of the overlapping portion 28a. The diaphragm 42 does not resonate (see FIG. 5(c)).

Therefore, after the vibration generation process, a confirmation process is performed to confirm whether or not the diaphragms 32 and 42 of the search tools 30 and 40 respectively resonate due to the vibration generated in the floor member 28 by the vibration generation process. In this confirmation step, if resonance of the diaphragm 42 is confirmed and resonance of the diaphragm 32 is not confirmed, as shown in FIGS. It can be grasped that it is arranged in the non-overlapping portion 28b of the floor material 28 . On the other hand, when resonance of the diaphragm 32 is confirmed in the confirmation process and resonance of the diaphragm 42 is not confirmed, as shown in FIGS. is arranged in the overlapping portion 28a of the floor member 28. As shown in FIG. Therefore, in this case, the positions of the search tools 30 and 40 (specifically, the positions of the support portions 31 and 41) on the floor member 28 are the same as the positions of the small floor beams 26 in the beam alignment direction. I understand. Therefore, in this case, the position of the floor beam 26 can be searched (specified) based on the positions of the search tools 30 and 40 on the floor material 28 .

In the series of steps including the above-described placement step, vibration generation step, and confirmation step, the positions of the search tools 30 and 40 on the floor member 28 are confirmed by the confirmation step, and the resonance of the diaphragm 32 is confirmed. This is repeated while changing the positions of the search tools 30 and 40 in the direction in which the beams are arranged until the resonance is not confirmed. Then, when the positions of the search tools 30 and 40 on the floor member 28 are the positions where the resonance of the diaphragm 32 is confirmed and the resonance of the diaphragm 42 is not confirmed, based on the positions of the search tools 30 and 40 The position of the floor beam 26 is searched (identified). When changing the positions of the search tools 30 and 40 in the beam alignment direction, for example, the search tools 30 and 40 are placed on the floor member 28 and then slid in the beam alignment direction to change the positions. .

The placement step, the vibration generation step, and the confirmation step described above correspond to the "placement step," the "vibration generation step," and the "confirmation step," respectively.

According to the configuration of the present embodiment described in detail above, the following excellent effects are obtained.

In the method for searching the position of the floor beam 26 described above, it is confirmed whether or not the diaphragm 32 of the search tool 30 placed on the floor material 28 resonates due to the vibration generated in the floor material 28, and the result of the confirmation The position of the floor beam 26 is searched based on. According to this position search method, the position of the floor beam 26 can be searched regardless of the material of the floor beam 26 . In addition, the position of the floor beam 26 can be searched regardless of the materials of the members existing around the floor beam 26 . Therefore, the position of the floor beam 26 can be searched even in the configuration in which the underfloor heat insulating material 29 with the skin material 29a made of aluminum sheet is provided around the floor beam 26. FIG. Therefore, from the above, the position of the floor beam 26 can be suitably searched from the surface side of the floor material 28 .

As the searching tools 30 and 40, the searching tool 30 having the diaphragm 32 resonating at the natural frequency Ea of the overlapping portion 28a and the searching tool 40 having the diaphragm 42 resonating at the natural frequency Eb of the non-overlapping portion 28b. Using. Then, it is confirmed whether or not the diaphragms 32 and 42 of the search tools 30 and 40 placed on the floor member 28 resonate due to the vibration generated in the floor member 28. The position of the small beam 26 is searched. In this case, since the position of the small floor beam 26 is searched using two types of diaphragms 32 and 42 having different natural frequencies, the position of the small floor beam 26 can be searched (identified) more reliably. becomes.

The search tools 30 and 40 are configured to have supporting portions 31 and 41 and diaphragms 32 and 42 cantilevered on the supporting portions 31 and 41 . In such a configuration, the projection dimensions of the diaphragms 32 and 42 projecting from the support portions 31 and 41 depend on the natural frequencies of the diaphragms 32 and 42 . Therefore, by adjusting the extension dimension of the diaphragm 32, it is possible to set the natural frequency E1 of the diaphragm 32 to the same frequency as the natural frequency Ea of the overlapping portion 28a. Further, by adjusting the extension dimension of the diaphragm 42, it is possible to set the natural frequency E2 of the diaphragm 42 to the same frequency as the natural frequency Eb of the non-overlapping portion 28b. Thereby, each of the searching tools 30 and 40 can be obtained relatively easily.

[Second embodiment]
In the first embodiment, the natural frequency Ea of the overlapping portion 28a and the natural frequency Eb of the non-overlapping portion 28b of the floor material 28 are obtained in advance, and the obtained natural frequency Ea of the overlapping portion 28a is used. A search tool 30 including a resonating diaphragm 32 was constructed, and a searching tool 40 including a diaphragm 42 resonating at the determined natural frequency Eb of the non-overlapping portion 28b was constructed. However, it is conceivable that the natural frequency Ea of the overlapping portion 28a and the natural frequency Eb of the non-overlapping portion 28b cannot be determined in advance. and the natural frequency Eb of are unknown. Therefore, in this case, the position of the floor beam 26 cannot be searched by the position searching method using the searching tools 30 and 40 in the first embodiment.

Therefore, in the present embodiment, even when the natural frequency Ea of the overlapping portion 28a and the natural frequency Eb of the non-overlapping portion 28b are unknown, the position of the floor beam 26 can be searched. A search tool 50 different from the search tools 30 and 40 in the embodiment is used to search for the position of the floor beam 26 . Therefore, a method for searching the position of the floor beam 26 in this embodiment will be described below.

First, the configuration of the searching tool 50 in this embodiment will be described with reference to FIG. FIG. 6 is a perspective view showing the configuration of the searching tool 50 in this embodiment. In this embodiment, a pair of searching tools 50 are used as the searching tools 50, but each of these searching tools 50 has the same configuration.

As shown in FIG. 6, each searching tool 50 has a support 51 and a plurality of diaphragms 52 cantilevered on the support 51 . The support body 51 is formed in a bar shape (square bar shape) by a square bar made of steel. Note that the support 51 may be made of other material such as wood or resin. Each searching tool 50 corresponds to a "pair of searching tools", and each diaphragm 52 corresponds to a "plurality of vibrating bodies".

Each diaphragm 52 is made of a flat steel plate with a small thickness, and is formed in a strip shape. In this embodiment, ten diaphragms 52 are used as the diaphragms 52 . Each vibration plate 52 is arranged side by side in the longitudinal direction of the support 51 with its longitudinal direction oriented in a direction perpendicular to the longitudinal direction of the support 51 . is fixed by Thereby, each diaphragm 52 is fixed to the support 51 in a cantilevered state. Further, each diaphragm 52 is in such a cantilevered state, and all project to the same side with respect to the support 51 . Each diaphragm 52 may be fixed to the support 51 by using double-faced tape or an adhesive in addition to the screws 53 in order to increase the fixing strength to the support 51 .

Each diaphragm 52 has the same width (specifically, the length in the lateral direction). On the other hand, the diaphragms 52 have different lengths (specifically, lengths in the longitudinal direction). In this embodiment, the reference numerals 52 of the diaphragms 52 having different lengths are assigned a to j to distinguish the diaphragms 52a to 52j. The diaphragms 52a to 52j increase in length in the order of diaphragm 52a→diaphragm 52b→ . . . →diaphragm 52i→diaphragm 52j. Therefore, the length of diaphragm 52a is the shortest, and the length of diaphragm 52j is the longest.

The vibrating plates 52a to 52j are arranged so that their lengths increase (longer) in order from one side to the other side in the longitudinal direction of the support 51. As shown in FIG. Due to this arrangement, each diaphragm 52a to 52j has a projecting dimension H from the support 51 that increases in order from one side to the other in the longitudinal direction of the support 51. As shown in FIG. As a result, the natural frequencies of the diaphragms 52a to 52j decrease in order from one side to the other side in the longitudinal direction of the support 51. As shown in FIG. In this case, among the diaphragms 52a to 52j, the diaphragm 52a has the highest natural frequency and the diaphragm 52j has the lowest natural frequency.

Each diaphragm 52a to 52j is set so that the natural frequency decreases by a predetermined value from one side to the other side in the longitudinal direction of the support 51. As shown in FIG. In this embodiment, the predetermined value is a fixed value. Therefore, in each of the diaphragms 52a to 52j, the natural frequency decreases at equal intervals from one side to the other side in the longitudinal direction of the support 51. As shown in FIG.

In this way, in the search tool 50, the natural frequencies of the diaphragms 52a to 52j are set to differ in magnitude, so that each of the diaphragms 52a to 52j has the same natural frequency as that of the overlapping portion 28a. It is possible to include a diaphragm 52 having a natural frequency and a diaphragm 52 having the same natural frequency as the natural frequency of the non-overlapping portion 28b.

Next, a position search method for searching the position of the floor beam 26 using a pair of search tools 50 will be described with reference to FIG. FIG. 7 is a diagram for explaining a method of searching for the position of the floor beam 26. As shown in FIG. 7(a) shows a state in which each searching tool 50 is arranged in the non-overlapping portion 28b of the floor member 28, and FIG. 7(b) shows a state in which one of the searching tools 50 overlaps 28a and the other in the non-overlapping portion 28b.

Also in this embodiment, when searching for the position of the small floor beam 26, it is assumed that the direction in which the small floor beams 26 are arranged is known in advance. The small floor beams 26 are arranged at predetermined intervals W (equal intervals) in the beam alignment direction, and the interval W between the small floor beams 26 (more specifically, the interval W between adjacent small floor beams 26) is also known in advance. shall be

When searching for the position of the floor beam 26 using a pair of search tools 50, first, as shown in FIG. An arranging step is performed in which the small beams 26 are arranged on the floor member 28 so as to be lined up in the longitudinal direction. In this placement step, in other words, each search tool 50 is placed on the floor member 28 in such a direction that the respective supports 51 extend parallel to each other in the longitudinal direction of the floor beam 26 . In the placement step, each searching tool 50 is placed on the floor member 28 so that each support 51 is at the same position in the longitudinal direction.

In the placement step, each searching tool 50 is placed on the flooring material 28 by placing the support 51 of each searching tool 50 on the surface of the flooring material 28 (in other words, in a contact state). In this case, the width of the support 51 of each searching tool 50 is smaller than the width of the floor beam 26 in such a mounted state. In addition, the diaphragms 52a to 52j of each searching tool 50 are arranged to be spaced apart from the floor member 28 by the arrangement step, thereby being able to vibrate up and down. Note that each support 51 may be temporarily fixed to the surface of the flooring material 28 using a double-faced tape during the placement process.

In the arranging step, each searching tool 50 is arranged so that the vibrating plates 52a to 52j from one side to the other side in the longitudinal direction of the floor beam 26 are arranged in the same order. Due to the arrangement of the search tools 50, the size order of the overhang dimension H of each of the diaphragms 52a to 52j from one side to the other in the longitudinal direction of each search tool 50 is the same. The height order of the natural frequencies of the diaphragms 52a to 52j is the same.

In the placement step, the interval L between the supports 51 of the search tools 50 (in other words, the interval L between the search tools 50 on the floor member 28) is smaller than the interval W between the floor beams 26 in the beam arrangement direction. Each searching tool 50 is arranged so that Specifically, the searching tools 50 are arranged so that the spacing L between the supports 51 of each searching tool 50 is half (1/2) the spacing W between the floor beams 26 .

Here, when each searching tool 50 is arranged on the floor member 28 with the spacing L between the supports 51 of each searching tool 50 as described above, each searching tool 50 will eventually are arranged in the non-overlapping portion 28b of the flooring material 28, or, as shown in FIG. The other will be placed in the non-overlapping portion 28b. Therefore, in the following description, the arrangement pattern in which the search tools 50 are arranged on the floor member 28 as shown in FIG. The arrangement pattern in which the fixtures 50 are arranged on the floor member 28 is called a second arrangement pattern.

After the arranging step, a vibration generation step is performed in which the floor member 28 is vibrated by applying an impact to the floor member 28 with the search tools 50 arranged on the floor member 28 . Since this vibration generation step is the same as the vibration generation step in the first embodiment, the description thereof is omitted here.

Due to the vibration generated in the floor member 28 by the vibration generating process, the diaphragms 52a to 52j of the search tools 50 placed on the floor member 28 vibrate. Here, when each searching tool 50 is arranged on the floor member 28 in the above-described first arrangement pattern (see FIG. 7A), that is, each searching tool 50 is arranged on the non-overlapping portion 28b. If so, each diaphragm 52a-52j of each searching tool 50 will be vibrated at the natural frequency Eb of the non-overlapping portion 28b. In this case, in each searching tool 50, the diaphragm 52 having the same natural frequency as the natural frequency Eb of the non-overlapping portion 28b resonates. Therefore, in this case, the diaphragm 52 having the same natural frequency resonates in each searching device 50 . In the example of FIG. 7(a), the same diaphragm 52i resonates in each searching device 50, and each diaphragm 52 that resonates is indicated by dot hatching.

On the other hand, when the search tools 50 are arranged on the floor member 28 in the second arrangement pattern (see FIG. 7(b)), one of the search tools 50 is arranged in the overlapping portion 28a. However, when the other searching tool 50 is arranged in the non-overlapping portion 28b, one of the searching tools 50 vibrates at the natural frequency Ea of the overlapping portion 28a with the diaphragms 52a to 52j. Vibration is applied to each of the diaphragms 52a to 52j in the other searching tool 50 at the natural frequency Eb of the non-overlapping portion 28b. In this case, in one searching tool 50, the diaphragm 52 having the same natural frequency as the natural frequency Ea of the overlapping portion 28a resonates, and in the other searching tool 50, the natural frequency Eb of the non-overlapping portion 28b is the same. A diaphragm 52 having a frequency will resonate. Therefore, in this case, the diaphragms 52 having different natural frequencies resonate in each searching device 50 . In the example of FIG. 7B, the diaphragm 52b of one of the searching tools 50 resonates, and the diaphragm 52i of the other searching tool 50 resonates. Further, in FIG. 7(b), these resonating diaphragms 52b and 52i are indicated by dot hatching.

As described above, the vibrating plate 52 that resonates in each searching tool 50 due to the vibration generating process differs depending on the layout pattern of each searching tool 50 on the floor member 28 . Therefore, in view of such a point, after the vibration generation process, vibrations generated in the floor surface material 28 by the vibration generation process cause the vibration plates 52a to 52j of the search tools 50 arranged on the floor surface material 28 to vibrate. Which one of them resonates is specified, and the resonant vibration plate 52 (hereinafter referred to as the resonant vibration plate 52A) is specified, and whether or not the specified resonant vibration plates 52A of the searching tools 50 have mutually different natural frequencies. A confirmation process is performed to confirm whether

When it is confirmed by the confirmation step that the resonant diaphragms 52A of the searching tools 50 have the same natural frequency, the searching tools 50 are arranged in the first arrangement pattern on the floor member 28. It can be understood that there is In other words, in this case, it can be understood that each searching tool 50 is arranged in the non-overlapping portion 28b of the floor member 28 . In the example of FIG. 7(a), the resonant diaphragm 52A of each searching tool 50 is a diaphragm 52i.

On the other hand, if the confirmation step confirms that the resonant diaphragm 52A of each searching tool 50 has a different natural frequency, then each searching tool 50 is arranged in the second arrangement pattern on the flooring 28. It can be grasped that it is arranged in . In other words, in this case, one of the searching tools 50 is arranged in the overlapping portion 28a of the floor member 28, and the other searching tool 50 is arranged in the non-overlapping portion 28b. be able to. In the example of FIG. 7B, one of the resonance diaphragms 52A of each searching tool 50 is a diaphragm 52b, and the other is a diaphragm 52i.

Here, in the floor material 28, the natural frequency Ea of the overlapping portion 28a is higher than the natural frequency Eb of the non-overlapping portion 28b. Therefore, when the search tools 50 are arranged in the second arrangement pattern, among the resonance diaphragms 52A that resonate in the search tools 50, the resonance diaphragm 52A on the side with the higher natural frequency (Fig. 7(b) ), the diaphragm 52b) resonates at the natural frequency Ea of the overlapping portion 28a, and the resonant diaphragm 52A (diaphragm 52i in the example of FIG. 7B) having a lower natural frequency resonates at the non-overlapping portion 28b. will resonate at the natural frequency Eb of . Therefore, in this case, the searching tool 50 having the resonant diaphragm 52A with the higher natural frequency (hereinafter referred to as the searching tool 50 with the higher natural frequency) is arranged in the overlapping portion 28a of the floor member 28, The searching tool 50 having the resonance diaphragm 52A on the lower frequency side (hereinafter referred to as the searching tool 50 on the lower natural frequency side) is arranged in the non-overlapping portion 28b of the floor member 28. FIG. Therefore, in this case, the position of the search tool 50 on the side of the floor member 28 having the higher natural frequency is the same as the position of the small floor beam 26 in the beam alignment direction. Therefore, in this case, it is possible to search (specify) the position of the floor beam 26 based on the position of the search tool 50 .

In the series of steps including the placement step, vibration generation step, and confirmation step described above, the position of each search tool 50 on the floor member 28 is determined by the confirmation process so that the resonance diaphragm 52A of each search tool 50 has a different natural frequency. This is repeated while changing the position of each searching tool 50 in the beam alignment direction until it reaches a position where it is confirmed that it has one. Then, when the position of each searching tool 50 on the floor member 28 becomes a position where it is confirmed that the resonance diaphragm 52A of each searching tool 50 has a different natural frequency, the natural frequency of each searching tool 50 The position of the floor beam 26 is searched (specified) based on the position of the search tool 50 having the resonance diaphragm 52A on the higher side. When changing the position of each searching tool 50 in the beam-arranging direction, for example, each searching tool 50 is placed on the floor member 28 and then slid in the beam-arranging direction to change the position.

The placement step, the vibration generation step, and the confirmation step described above correspond to the "placement step," the "vibration generation step," and the "confirmation step," respectively.

According to the configuration of the present embodiment described in detail above, the following excellent effects are obtained.

According to the method for searching the position of the small floor beam 26 in the above-described embodiment, as in the method for searching the position in the first embodiment, regardless of the material of the small floor beam 26, The position of the floor beam 26 can be searched regardless of the material of the member. Therefore, the position of the floor beam 26 can be searched favorably. Further, in the position search method of this embodiment, even if the natural frequencies of the overlapping portion 28a and the non-overlapping portion 28b of the floor material 28 are unknown, the position of the floor beam 26 can be preferably searched.

Each searching tool 50 is configured with an elongated support 51 and a plurality of diaphragms 52a to 52j cantilevered on the support 51. As shown in FIG. In addition, the diaphragms 52a to 52j have different projection dimensions from the support 51, so that the diaphragms 52a to 52j have different natural frequencies. In this case, diaphragms 52a to 52j having different natural frequencies can be obtained by adjusting the projection dimensions of diaphragms 52a to 52j. Therefore, it is possible to obtain the searching tool 50 in this embodiment relatively easily.

Also, when confirming whether or not the resonant diaphragms 52 (resonant diaphragms 52A) in each searching tool 50 have mutually different natural frequencies, the projecting dimensions of the resonant diaphragms 52A are compared. can be confirmed by Therefore, there is also the advantage that such confirmation can be facilitated.

In each searching tool 50, the respective diaphragms 52a to 52j are arranged in order of the height of the natural frequency. When arranging each search tool 50 on the floor member 28, in each search tool 50, the arrangement order of the vibration plates 52a to 52j from one side to the other side in the longitudinal direction of the floor beam 26 is arranged to be the same. In this case, in each searching tool 50, since the height order of the natural frequencies of the diaphragms 52a to 52j from one side to the other in the longitudinal direction is the same, the resonance diaphragm of each searching tool 50 When confirming whether 52A has mutually different natural frequencies, the confirmation can be facilitated.

[Other embodiments]
The present invention is not limited to the above embodiments, and may be implemented as follows, for example.

(1) In the first embodiment, two types of search tools 30 and 40 were used to search for the position of the floor beam 26. Of these search tools 30 and 40, the search tool 30 (the first search tool) equivalent) may be used to search for the position of the floor beam 26 only. In this case, in the placement step, the searching tool 30 (only) is placed on the floor material 28, and in the vibration generating step, the flooring material 28 is subjected to impact while the searching tool 30 is placed, and the floor material 28 vibrates. give rise to Then, in the confirmation step, it is confirmed whether or not the diaphragm 32 of the searching tool 30 arranged on the floor surface material 28 resonates due to the vibration generated in the floor surface material 28. is confirmed, the position of the floor beam 26 is searched based on the position of the search tool 30 (specifically, the position of the support portion 31) on the floor surface material 28. In this case as well, the position of the floor beam 26 can be suitably searched from the surface side of the floor material 28 .

(2) In the first embodiment, the vibration plates 32 and 42 are used as the vibrating bodies of the searching tools 30 and 40 (corresponding to the first searching tool and the second searching tool). Anything other than the plates 32, 42 may be used. For example, it is conceivable to use a tuning fork as the diaphragm. In this case, for the first searching tool, a first tuning fork that resonates (resonates) at the natural frequency of the overlapping portion 28a is used, and for the second searching tool, a second tuning fork that resonates (resonates) at the natural frequency of the non-overlapping portion 28b is used. It is conceivable to use a tuning fork.

(3) In the second embodiment, the diaphragm 52 is used as the vibrating body of the searching tool 50, but it is also possible to use something other than the diaphragm as the vibrating body of the searching tool. For example, it is conceivable to use a liquid contained in a cylindrical container as the vibrator. Specifically, in this case, as shown in FIG. 8, a searching tool 60 having a plurality of cylindrical containers 61 arranged in a line and connected to each other and a liquid 63 contained in each cylindrical container 61 is provided. It is conceivable to configure In this case, the depths of the liquids 63 in the cylindrical containers 61 are different from each other, and due to the difference, the natural frequencies of the liquids 63 are different from each other. Therefore, in the searching tool 60, the liquid 63 has the same natural frequency as the natural frequency Ea of the overlapping portion 28a, and the liquid 63 having the same natural frequency as the natural frequency Eb of the non-overlapping portion 28b. can be included. As a result, even with the searching tool 60, it is possible to search for the position of the floor beam 26 when the natural frequency Ea of the overlapping portion 28a is unknown.

(4) In each of the above embodiments, when searching for the position of the floor girders 26 (corresponding to long members) arranged side by side on the back side of the floor panel 28 (corresponding to the panel), the position search of the present invention Although the method is used, the position searching method of the present invention can also be applied when searching for a long member other than the floor beam 26 . For example, in the ceiling portion of the building unit 20 , a plurality of ceiling beams 25 are arranged side by side on the back side (top side) of the ceiling panel 27 . Therefore, the position search method of the present invention may be used when searching for the position of the ceiling girders 25 (corresponding to long members) from the surface side (lower surface side) of the ceiling panel 27 (corresponding to the panel).

When searching for the position of the ceiling beam 25, for example, searching using the search tools 30 and 40 in the first embodiment can be considered. In this case, the search tools 30 and 40 are arranged on the surface of the ceiling panel 27 in the arrangement step. In this arrangement, the support portions 31 and 41 of the search tools 30 and 40 are arranged on the surface of the ceiling panel 27 (in contact with each other), and the support portions 31 and 41 are temporarily attached to the ceiling panel 27 in that arrangement state. fixed. In this case, it is conceivable that the support portions 31 and 41 are made of light wooden rectangular timbers and that the support portions 31 and 41 are temporarily fixed using double-sided tape or the like. Then, in the vibration generating step, impact is applied to the ceiling panel 27 while the search tools 30 and 40 are arranged to cause the ceiling panel 27 to vibrate. Then, it is confirmed whether or not the diaphragms 32 and 42 of the search tools 30 and 40 arranged on the ceiling panel 27 resonate due to the vibration generated in the ceiling panel 27. The position of the beam 25 is searched.

(5) In some cases, on the side surface of the building unit 20, a plurality of vertical members for supporting the wall surface material are arranged side by side on the back side of the wall surface material. Therefore, in such a case, the position searching method of the present invention may be used when searching for the position of the vertical member (corresponding to the long member) from the surface side of the wall member (corresponding to the face member).

(6) In (4) above, when searching for the position of the ceiling girders 25, the case of searching using the search tools 30 and 40 in the first embodiment was described, but the position of the ceiling girders 25 may be searched using the search tool 50 in the second embodiment. When searching for the position of the ceiling beam 25 using the position searching method of the second embodiment, a pendulum-type searching tool having a pendulum as a vibrating body may be used instead of the searching tool 50. .

When using a pendulum-type search tool, the pendulum-type search tool consists of a long support arranged on the ceiling panel 27 and a plurality of pendulums suspended from the support and arranged in the longitudinal direction of the support. and The plurality of pendulums have different suspension lengths from the support, and due to this difference, the natural frequencies during vibration are different from each other. When searching for the position of the ceiling beam 25 using such a pendulum-type search tool, each pendulum-type search tool is placed with its support temporarily fixed to the surface of the ceiling panel 27, and the Vibration is generated in the ceiling surface material 27 in the arranged state. Then, by the vibration, which of the pendulums in each pendulum type searching tool resonates is specified, and the resonating pendulum (hereinafter referred to as a resonant pendulum) is specified, and the resonant pendulums of the specified pendulum type searching tools are unique Check whether or not it has a vibration frequency. Then, based on the confirmation result, the position of the ceiling beam 25 is searched. Therefore, even with such a configuration, the position of the ceiling girders 25 can be searched favorably.

(7) In the second embodiment, in the searching tool 50, the extension dimension H of each diaphragm 52 from the support 51 is made different from each other, so that the natural frequency of each diaphragm 52 is made different from each other. However, even if this is changed, for example, the width dimension of each diaphragm 52 is made different from each other, or the thickness of each diaphragm 52 is made different from each other, and the natural frequency of each diaphragm 52 is made different from each other. good.

(8) In each of the above-described embodiments, the case where the position search method of the present invention is applied to a unit-type building has been described, but the position search method of the present invention can be applied to a building constructed by a steel frame construction method or a conventional wooden structure. It can also be applied to buildings constructed by other construction methods, such as buildings constructed by construction methods. For example, in buildings constructed using conventional construction methods, there are cases where multiple long wooden members are arranged side by side on the back side of the facing material. When searching, the position search method of the present invention may be used. According to the position search method of the present invention, the position of the elongated member can be searched for regardless of the material of the elongated member. can.

20... Building unit 26... Floor beam as long member 28... Floor member as face member 28a... Overlapping portion 28b... Non-overlapping portion 30... Search tool as first search tool 31... Supporting part 32... Diaphragm as first vibrating body 40... Searching tool as second searching tool 41... Supporting part 42... Diaphragm as second vibrating body 50... Searching tool 51... Support body , 52 . . . a diaphragm as a vibrating body.

Claims (2)

Applied to a building in which a plurality of long members supporting the face member are arranged at predetermined intervals on the back side of the face member, and the position of the long members is detected from the front side of the face member by a first search tool. and a method for searching the position of a long material using a second searching tool ,
The face material has an overlapping portion that overlaps with the elongated member in its thickness direction and a non-overlapping portion that does not overlap with the elongated member,
The first searching tool has a first vibrating body that resonates when vibration of the same frequency as the predetermined natural frequency of the overlapping portion is applied,
The second searching tool has a second vibrating body that resonates when vibration of the same frequency as the predetermined natural frequency of the non-overlapping portion is applied,
an arrangement step of arranging the first search tool and the second search tool in contact with the surface of the face material at the same position in the direction in which the long materials are arranged ;
a vibration generation step of applying an impact to the face member to cause vibration in the face member in the arrangement state of each of the searching tools in the arrangement step;
a confirming step of confirming whether or not the first vibrating body and the second vibrating body of each of the searching tools arranged on the facing material resonate due to the vibration generated in the facing material by the vibration generating step. ,
If the confirming step confirms the resonance of the first vibrating body and does not confirm the resonance of the second vibrating body , search for the position of the elongated material based on the positions of the search tools on the face material. A method of searching for a position of a long material, characterized by: Each of the search tools has a support and a diaphragm cantilevered on the support,
The diaphragm of the first searching tool corresponds to the first vibrating body,
the diaphragm of the second searching tool corresponds to the second vibrating body,
In the arranging step, the first searching tool is arranged with the support part of the first searching tool in contact with the surface of the face material , and the supporting part of the second searching tool is placed on the surface of the face material. 2. The method of searching for a position of a long material according to claim 1, wherein said second searching tool is placed in contact with the .

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