JP2021127995A - Position search method of long-sized member - Google Patents

Abstract

To provide a position search method of a long-sized member that can suitably search for the position of the long-sized member arranged on the back surface side of the surface member.SOLUTION: In the floor of the building, a plurality of floor beams 26 are provided side by side at predetermined intervals on the back surface side of a floor member 28. When searching for the position of the floor beam 26 from the surface side of the floor member 28, a search tool 30 is used. The search tool 30 has a diaphragm 32 that resonates when a vibration having the same frequency as the natural frequency of an overlapping portion 28a overlapping the floor beam 26 is applied to the floor member 28. When searching for the position of the floor beam 26, the search tool 30 is arranged on the surface of the floor surface material 28, and in the arranged state, an impact is applied to the floor surface material 28 to cause vibration in the floor surface member 28. Then, it is confirmed whether or not the diaphragm 32 of the search tool 30 arranged on the floor surface member 28 resonates due to the vibration generated on the floor surface member 28. As a result, when the resonance of the diaphragm 32 is confirmed, the position of the floor beam 26 is searched based on the position of the search tool 30 on the floor surface member 28.SELECTED DRAWING: Figure 5

Description

The present invention is applied to a building in which long timbers supporting the face timber are arranged side by side on the back surface side of the face timber, and a length for searching the position of the long timber from the front surface side of the face timber using a search tool. It relates to a method for searching the position of a scale material.

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

In buildings, the face material may be drilled or otherwise processed by remodeling or the like. In this case, the processing of the face material needs to be performed at a position avoiding the long material arranged on the back surface side of the face material. Therefore, when processing the face material, it is necessary to confirm the arrangement position where the long material is arranged in advance.

Since the long material is provided on the back side of the face material, it is necessary to remove the face material and check the position of the long material. However, the work of removing the face material requires a great deal of labor. Therefore, Patent Document 1 proposes a method of exploring a long metal brace arranged on the back surface of a face material from the front surface side of the face material by using an electromagnetic induction type exploration device. According to the method of Patent Document 1, since the position of the long material can be confirmed without removing the face material, the position of the long material can be confirmed relatively easily.

JP-A-2010-60402

However, since the method of Patent Document 1 uses electromagnetic induction, the search cannot be performed unless the long material to be searched is made of a metal that reacts with magnetism. Further, if there is a metal member that reacts to magnetism around the long lumber, there is a risk that the member may be mistakenly searched for the long lumber. In that case, the position of the long lumber is searched. Can not do it.

The present invention has been made in view of the above circumstances, and mainly provides a method for searching the position of long timbers, which can suitably search for the positions of long timbers arranged on the back surface side of the face member. It is the purpose.

In order to solve the above problem, the method for searching the position of a long material according to the first invention is applied to a building in which a plurality of long materials supporting the face material are arranged side by side at predetermined intervals on the back surface side of the face material. It is a method of searching for the position of the long material from the surface side of the face material by using a search tool, and the face material has the same as the long material in the thickness direction. There is an overlapping portion and a non-overlapping portion that does not overlap with the long material, and the search tool resonates when a vibration having the same frequency as the inherent frequency of the overlapping portion obtained in advance is applied. By having a vibrating body and applying an impact to the face material in the arrangement step of arranging the search tool in contact with the surface of the face material and in the arrangement state of the search tool by the arrangement step. Confirmation to confirm whether or not the vibration body of the search tool arranged on the face material resonates due to the vibration generation step of causing the face material to vibrate and the vibration generated on the face material by the vibration generation step. It is characterized in that, when the resonance of the vibrating body is confirmed by the confirmation step, the position of the long member is searched based on the position of the search tool in the face material.

In the configuration in which a plurality of long lumbers are arranged side by side on the back surface side of the face material, there are an overlapping portion that overlaps with the long lumber and a non-overlapping portion that does not overlap with the long lumber in the face material. In such a configuration, when vibration occurs in the face material, it is considered that the natural frequency of the overlapping portion is higher than that of the non-overlapping portion because it overlaps with the long member.

Further, when the panel having the face material and the plurality of long materials is standardized in advance, the natural frequencies of the overlapping portion and the non-overlapping portion of the face material are clarified in the panel. Therefore, in such a case, if a standardized panel is prepared at a factory or the like, the natural frequencies 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 frequency is the same as the natural frequency of the obtained overlapping portion. The position of the long material is searched for by using a search tool having a vibrating body that resonates when the vibration of the above is applied.

When searching for the position of a long lumber 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 position. Give rise. In this case, the vibrating body of the search tool arranged on the face material vibrates due to the vibration generated on the face material. Here, when the search tool is arranged at the overlapping portion in the face material, the vibrating body resonates because the vibrating body is vibrated at the natural frequency of the overlapping portion. On the other hand, when the search tool is arranged in the non-overlapping portion in the face material, the vibrating body does not resonate because the vibrating body is vibrated at the natural frequency of the non-overlapping portion.

Therefore, after the face material is vibrated, 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 vibrating body is confirmed by this confirmation, the search tool is arranged at the overlapping portion in the face material. Therefore, in this case, the position of the search tool on the face material is the same as the position of the long lumber and the arrangement direction of the long lumber. Therefore, in this case, it is possible to search (specify) the position of the long lumber based on the position of the search tool on the face material.

According to the above position search method, the position of the long lumber can be searched regardless of the material of the long lumber. Therefore, the position of the long lumber can be searched even if the long lumber is not made of metal. In addition, the position of the long lumber can be searched regardless of the material of the member existing around the long lumber. Therefore, even if a metal member exists around the long lumber, the position of the long lumber can be searched. Therefore, from the above, the position of the long material can be preferably searched from the surface side of the face material.

In the first invention, the method for searching the position of a long material according to the second invention is that the search tool is a first search tool having a first vibrating body as the vibrating body, and the first searching tool and the first searching tool thereof. This is a method for searching the position of the long material using the two search tools, wherein the second search tool has the same frequency as the inherent frequency of the non-overlapping portion obtained in advance. It has a second vibrating body that resonates when the vibration of In the vibration generation step, vibration was generated in the face material in the placement state of each of the search tools by the placement step, and in the confirmation step, the face material was generated. It is confirmed whether or not the first vibrating body and the second vibrating body of each of the search tools arranged on the face material resonate due to vibration, and the resonance of the first vibrating body is confirmed by the confirmation step. When the resonance of the second vibrating body is not confirmed, the position of the long member is searched based on the position of each search tool on the face material.

In the second invention, as the search tool, a second search tool is used in addition to the first search tool. The second search tool is configured to have a second vibrating body that resonates when vibration is applied at the same frequency as the natural frequency of the non-overlapping portion obtained in advance. When searching for the position of a long lumber 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 arrangement direction of the long lumber. Then, in that arrangement state, an impact is applied to the face material to cause vibration in the face material. In this case, the vibrating body of each search tool arranged on the face material vibrates due to the vibration generated on the face material. Here, when each search tool is arranged in the overlapping portion in the face 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 search tool is arranged in a non-overlapping portion in the face 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 the face material is vibrated, it is confirmed whether or not the first vibrating body and the second vibrating body resonate due to the vibration. According to this confirmation, when the first vibrating body resonates and the second vibrating body does not resonate, each search tool is arranged at the overlapping portion in the face material. In this case, it is possible to search for the position of the long lumber based on the position of each search tool on the face material. In such a position search method, the position of the long material is searched using two types of vibrating bodies having different natural frequencies, so that the position of the long material can be searched (specified) more reliably. Become.

In the first or second invention, the method for searching the position of a long lumber of the third invention is that the search tool has a support portion and a diaphragm as a vibrating body that is cantilevered and supported by the support portion. The search tool is characterized in that the search tool is placed in a state where the support portion is in contact with the surface of the face material.

According to the third invention, the search tool is configured to have a support portion and a diaphragm that is cantilevered and supported by the support portion. In this case, the overhanging dimension of the diaphragm protruding from the support portion depends on the natural frequency of the diaphragm. Therefore, by adjusting the overhanging dimension, it is possible to set the natural frequency of the diaphragm to the same frequency as the natural frequency of the overlapping portion. Thereby, the search tool can be obtained relatively easily.

The method for searching the position of a long material of the fourth invention is applied to a building in which a plurality of long materials supporting the face material are arranged side by side at predetermined intervals on the back surface side of the face material, and the face material is A method for searching the position of a long material from the surface side using a pair of search tools, wherein the search tools are arranged in a predetermined direction and have different natural frequencies. It has a vibrating body, and includes an arranging step of arranging each of the searching tools in a direction in which each of the vibrating bodies is arranged in the longitudinal direction of the long member and in contact with the surface of the face member. In the arrangement step, the search tools are arranged so that the distance between the search tools in the face material is smaller than the predetermined distance in the arrangement direction in which the long members are lined up. In the arrangement state of each of the search tools by the process, a vibration generation step of causing the face material to vibrate by applying an impact to the face material, and a vibration generated in the face material by the vibration generation step cause the face material to vibrate. Which of the vibrating bodies resonates in each of the arranged search tools is specified as a resonating vibrating body, and the resonating vibrating bodies of the specified searching tools have different natural frequencies. When it is confirmed by the confirmation step that the resonance vibrating body of each of the search tools has a different natural frequency, each resonance is provided. It is characterized in that the position of the long member is searched based on the position of the search tool having the resonance vibrating body on the side of the vibrating body having a higher natural frequency in the face material.

In a configuration in which a plurality of long lumbers are arranged side by side on the back surface side of the face material, it is assumed that the natural frequency of the overlapping portion (and the non-overlapping portion) in the face material is unknown. In that case, the position search method of the first invention for searching the position of a long member using a vibrating body that resonates at the natural frequency of the overlapping portion cannot construct a search tool having such a vibrating body. As a result, the position of the long material cannot be searched. Therefore, in the fourth invention, the position of the long lumber is searched by using a search tool different from that of the first invention so that the position of the long lumber 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 is used as the search tool. Each of these search tools is configured to have a plurality of vibrating bodies having different natural frequencies. In this case, in each search tool, as a vibrating body, a vibrating body having the same natural frequency as the natural frequency of the overlapping part (in other words, a vibrating body resonating at the natural frequency of the overlapping part) and the natural vibration of the non-overlapping part. It is possible to include a vibrating body having the same natural frequency as the number (in other words, a vibrating body that resonates at the natural frequency of the non-overlapping portion).

When searching for the position of a long lumber using each of the above-mentioned search tools, first, each search tool is in contact with the surface of the face material in a direction in which each vibrating body is aligned in the longitudinal direction of the long lumber. Place with. Further, in this arrangement, each search tool is arranged so that the interval between the search tools in the face material is smaller than the interval (predetermined interval) of the long timbers in the arrangement direction of the long timbers. When each search tool is arranged on the face material in this way, each search tool is arranged on the non-overlapping portion in the face material, or one of the search tools is arranged on the overlapping portion on the face material and the other. Will be placed in the non-overlapping part. Hereinafter, the pattern in which each search tool is arranged as in the former is referred to as a first arrangement pattern, and the pattern in which each search tool is arranged as in the latter is referred to as a second arrangement pattern.

After arranging each search tool on the face material, an impact is applied to the face material in the arranged state to cause vibration in the face material. As a result, the vibration generated in the face material causes each vibrating body of each search tool arranged on the face material to vibrate. Here, when each search tool is arranged on the face material in the first arrangement pattern, that is, when all the search tools are arranged in the non-overlapping portion, the non-overlapping portion is unique in each search tool. A vibrating body having the same natural frequency as the frequency will resonate. Therefore, in this case, the vibrating body having the same natural frequency resonates in each search tool.

On the other hand, when each search tool is arranged on the face material in the second arrangement pattern, that is, when 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 part resonates, and in the other search tool, a vibrating body having the same natural frequency as the natural frequency of the non-overlapping part. Will resonate. Therefore, in this case, the vibrating bodies having different natural frequencies resonate in each search tool.

Therefore, in view of the above points, after the face material is vibrated, the resonating resonant vibrating body is specified among the plurality of vibrating bodies in each search tool arranged on the face material by the vibration, and each specified search is performed. It is to be confirmed whether or not the resonant oscillators of the tool have natural frequencies different from each other. By this confirmation, when the resonant vibrating body of each search tool has a different natural frequency, it can be grasped that each search tool is arranged in the second arrangement pattern on the face material. That is, in this case, it can be grasped that one of the search tools is arranged in the overlapping portion in 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 each search tool is arranged in the second arrangement pattern, the search tool having the resonance vibrating body on the side having the higher natural frequency among the resonating vibrating bodies resonating in each searching tool (hereinafter, natural frequency). The search tool on the high side is arranged in the overlapping portion in the face material, and the search tool having the resonance vibrating body on the side having the low natural frequency is arranged in the non-overlapping part in the face material. Therefore, in this case, the position of the search tool on the side where the natural frequency of the face material is high is the same as the position of the long lumber and the arrangement direction of the long lumber. Therefore, in this case, it is possible to search for the position of the long lumber based on the position of the search tool.

According to the above-mentioned position search method, as in the position search method of the first invention, the position of the long material is not limited to the material of the long material and the material of the member existing around the long material. Can be searched. Therefore, the position of the long material can be suitably searched from the surface side of the face material. Further, in the above position search method, even if the natural frequencies of the overlapping portion and the non-overlapping portion are unknown, the position of the long lumber can be preferably searched.

In the fourth invention, the method for searching the position of a long member of the fifth invention is that each of the search tools has a long support extending in a predetermined direction, and the support has a long support. Each of a plurality of cantilevered diaphragms is provided as the vibrating body, and in the arranging step, when the searching tools are arranged on the face material, the supporting body of the searching tools is long. The supports are arranged in a state of being in contact with the surface of the face material in a direction extending in the longitudinal direction of the material, and the distance between the supports of the search tool is the distance in the arrangement direction of the long materials. Arranged at intervals different from the predetermined intervals, in each of the search tools, each of the diaphragms has a different overhanging dimension from the support, and the difference causes the unique characteristics of each of the diaphragms. It is characterized in that the frequencies are different from each other.

According to the fifth invention, each search tool is configured to have a long support and a plurality of diaphragms that are cantilevered and supported by the support. When each search tool is arranged on the face material, the support of each search tool is arranged in a direction extending in the longitudinal direction of the long member, and each support is arranged in contact with the face material. Further, each diaphragm is cantilevered by a support, and the overhanging dimensions from the support are different from each other. The natural frequencies of the diaphragms are different from each other due to the difference in the overhanging dimensions. In this case, by adjusting the overhanging dimensions of each diaphragm, it is possible to obtain each diaphragm having a different natural frequency. Therefore, the search tool of the fourth invention can be obtained relatively easily.

Further, when confirming whether or not the resonating diaphragms (resonant diaphragms) in each search tool have different natural frequencies, it is confirmed by comparing the overhanging dimensions of the resonant diaphragms. be able to. Therefore, there is an advantage that such confirmation can be facilitated.

In the fourth or fifth invention, the method for searching the position of a long member of the sixth invention is that in each of the search tools, the vibrating bodies are directed from one side to the other in the predetermined direction. They are arranged in order so that the natural frequency becomes higher. In the arrangement step, when each of the search tools is arranged on the face material, in each of the search tools, one side to the other side in the longitudinal direction of the long material is used. It is characterized in that the vibrating bodies are arranged so that the arrangement order of the vibrating bodies is the same.

According to the sixth invention, in each search tool, each vibrating body is arranged in the order of height of the natural frequency. When each of the search tools is arranged on the face material, the vibrating bodies are arranged so that the arrangement order of the vibrating bodies from one side to the other side in the longitudinal direction of the long material is the same in each search tool. NS. In this case, in each search tool, the height order of the natural frequencies of each vibrating body from one side to the other side in the longitudinal direction is the same, so that the resonant vibrating bodies of each searching tool have different natural vibrations. When confirming whether or not the item has a number, it is possible to facilitate the confirmation.

The perspective view which shows the structure of the building unit which constitutes a unit type building. The vertical sectional view which shows the structure of the floor part of a building unit. The perspective view which shows the structure of each search tool in 1st Embodiment. The figure for demonstrating the position search method of a floor beam. The figure for demonstrating the position search method of a floor beam. The perspective view which shows the structure of the search tool in 2nd Embodiment. The figure for demonstrating the position search method of a floor beam. The figure which shows the structure of the search tool in another embodiment.

[First Embodiment]
Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In the present embodiment, the present invention is embodied as a method for searching the position of floor beams arranged side by side on the back surface side of the floor surface material in the floor portion of a unit type building. In the following, first, the configuration of the floor of the unit type building will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing the configuration of a building unit constituting a unit-type building, and FIG. 2 is a vertical cross-sectional view showing the configuration of a floor portion of the building unit. Although not shown, the unit type building is composed of a plurality of rectangular parallelepiped building units combined with each other.

As shown in FIG. 1, the building unit 20 has four pillars 21 arranged at its four corners, and four ceiling girders 22 and floor girders 23 connecting the upper ends and lower ends of the pillars 21, respectively. And have. In the building unit 20, a rectangular parallelepiped skeleton (frame) is formed by the pillars 21, the ceiling girder 22, and the floor girder 23. The pillar 21 is made of square tubular steel. The ceiling girder 22 and the floor girder 23 are made of channel steel having a U-shaped cross section, and are installed so that their openings face each other.

A plurality of ceiling beams 25 are bridged between the ceiling beams 22 on the long sides facing each other at predetermined intervals (specifically, at equal intervals). Further, a plurality of floor beams 26 are bridged between the floor beams 23 on the long side facing each other at predetermined intervals (specifically, at equal intervals). For example, the ceiling beam 25 is made of lip channel steel and the floor beam 26 is made of square steel. The ceiling surface member 27 is supported from above by the ceiling beam 25, and the floor surface material 28 is supported from below by the floor beam 26.

Subsequently, the configuration of the floor portion 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 with each other. The upper surfaces of each of these floor beams 26 are set at the same height position. A floor material 28 is provided on the upper surface of each floor beam 26. The floor surface material 28 is provided in a state of being placed on the upper surface of each floor beam 26. The floor surface material 28 is configured to have a particle board, and is fixed to the floor beam 26 with screws or the like. The floor beam 26 corresponds to a long lumber, and the floor surface material 28 corresponds to a face material. Further, the floor panel is composed of the floor surface material 28 and each floor beam 26.

An underfloor heat insulating material 29 is provided on the lower surface side (back surface side) of the floor surface material 28. The underfloor heat insulating material 29 is composed of a fiber-based heat insulating material such as glass wool or a foam-based heat insulating material such as urethane foam, and a skin material 29a made of an aluminum sheet is attached to the surface of any of the heat insulating materials. There is. The underfloor heat insulating material 29 is formed in a plate shape having a predetermined thickness, and is arranged between adjacent floor beams 26.

The floor surface material 28 includes an overlapping portion 28a that overlaps with the floor beam 26 in the thickness direction thereof and a non-overlapping portion 28b that does not overlap with the floor beam 26. The overlapping portion 28a and the non-overlapping portion 28b are alternately present in the beam arrangement direction in which the floor beams 26 are lined up. The floor surface material 28 is fixed to the floor beam 26 at each overlapping portion 28a.

Here, in the floor surface material 28, when vibration is generated due to an impact or the like, it is considered that the overlapping portion 28a and the non-overlapping portion 28b are vibrated at different frequencies (natural frequencies). Specifically, it is considered that the overlapping portion 28a has a higher rigidity than the non-overlapping portion 28b because it overlaps with the floor beam 26. Therefore, the overlapping portion 28a vibrates higher than the non-overlapping portion 28b. It is considered that vibration occurs at a number (natural frequency). That is, it is considered that the natural frequency at the time of vibration is higher in the overlapping portion 28a than in the non-overlapping portion 28b.

Therefore, in the present embodiment, paying attention to the difference in the natural frequency between the overlapping portion 28a and the non-overlapping portion 28b, the position of the floor beam 26 is determined by using a search tool having a vibrating body. I am going to search. Therefore, in the following, a method of searching for the position of the floor beam 26 using such a search tool will be described. In the present embodiment, two types of search tools 30 and 40 are used as the search tools. First, the configurations of the search tools 30 and 40 will be described below with reference to FIG. Note that FIG. 3 is a perspective view showing the configurations of the search tools 30 and 40. Further, the search tools 30 and 40 basically have the same configuration, and therefore, the configurations of the search tools 30 and 40 will be collectively described below.

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

The diaphragms 32 and 42 are made of a flat plate-shaped steel plate having a small thickness, and are formed in a strip shape. One end of the diaphragms 32 and 42 in the longitudinal direction is fixed to the support portions 31 and 41 by screws 33 and 43. The diaphragms 32, 42 are fixed to the support portions 31, 41 in a direction in which the longitudinal direction thereof is orthogonal to the longitudinal direction of the support portions 31, 41. The diaphragms 32 and 42 may be fixed to the support portions 31 and 41 by using double-sided tape or an adhesive in addition to the screws 33 and 43 in order to increase the fixing strength to the support portions 31 and 41.

The diaphragms 32 and 42 are provided with the other end side 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, whereby the other end side (free end side) protruding from the support portions 31 and 41 can vibrate in the thickness direction. (Can swing).

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

Since the overhanging dimension H1 of the diaphragm 32 is shorter than the overhanging 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 vibrating plate 32 is set to the same value as the natural frequency Ea of the overlapping portion 28a of the floor surface material 28, and the natural frequency E2 of the vibrating plate 42 is set to the non-overlapping portion 28b of the floor surface material 28. It 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 beam 26 is standardized in advance in a fixed 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 clarified. Therefore, in the present embodiment, this standardized floor panel is prepared at the factory, and a vibration test is performed on the floor panel to obtain 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 search tool 30 is configured by adjusting the overhanging dimension H1 of the diaphragm 32 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. There is. Further, similarly to this, the search tool 40 is adjusted by adjusting the overhanging dimension H2 of the diaphragm 42 so that the natural frequency Eb of the non-overlapping portion 28b and the natural frequency E2 of the diaphragm 42 are the same. It is configured.

When 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 was measured by an accelerometer at each of the overlapping and non-overlapping parts, and these were measured. It is conceivable to obtain the natural frequencies of the overlapping and non-overlapping parts by analyzing the vibration acceleration in a frequency spectrum.

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

Next, the position search method of the floor beam 26 for searching the position of the floor beam 26 from the surface side (upper surface side) of the floor surface material 28 using the above-mentioned search tools 30 and 40 is shown in FIGS. 4 and 5. It will be explained based on. 4 and 5 are diagrams for explaining the position search method of the floor beam 26. Note that FIG. 4 shows a state in which the search tools 30 and 40 are arranged on the non-overlapping portion 28b on the floor surface material 28, and FIG. 5 shows the overlapped portions of the search tools 30 and 40 on the floor surface material 28. It shows the state of being arranged at 28a. Further, when searching for the position of the floor beams 26, it is assumed that the beam arrangement direction in which the floor beams 26 are lined up is known in advance. Therefore, it is assumed that the longitudinal direction of each floor beam 26 orthogonal to the beam arrangement direction is also known in advance.

When searching for the position of the floor beam 26 using the search tools 30 and 40, first, as shown in FIG. 4A or FIG. 5A, the search tools 30 and 40 are used on the floor surface material 28. Perform the placement process. In this arrangement step, the support portions 31, 41 of the search tools 30 and 40 are placed on the surface (upper surface) of the floor surface material 28 (in other words, in a state of being in contact with each other), so that the search tools 30 and 40 are placed in contact with each other. It is arranged on the floor material 28. Further, in this arrangement, the support portions 31 and 41 of the search tools 30 and 40 are placed on the floor surface material 28 at the same positions in the beam arrangement direction. As a result, the support portions 31 and 41 are arranged side by side in the longitudinal direction of the floor beam 26.

Further, in the arranging step, the support portions 31 and 41 of the search tools 30 and 40 are placed on the floor surface material 28 so that the longitudinal direction thereof is the same as the longitudinal direction of the floor beam 26. In this case, the width of each of the support portions 31 and 41 is smaller than the width of the floor beam 26 in such a mounted state. Further, depending on the arrangement process, the diaphragms 32 and 42 of the search tools 30 and 40 are arranged so as to be separated upward from the floor surface material 28, whereby the diaphragms 32 and 42 can vibrate up and down.

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

After the arrangement step, in a state where the search tools 30 and 40 are arranged on the floor surface material 28, a vibration generation step is performed in which the floor surface material 28 is vibrated by applying an impact to the floor surface material 28 (FIG. 4 (FIG. 4). b) etc.). In the vibration generation step, vibration is generated by applying an impact force F to the floor surface material 28 from the surface side of the floor surface material 28 by hand or foot. Although the impact force F is shown in both FIGS. 4 (b) and 4 (c), in reality, an impact is applied to a predetermined location (1 location) on the floor material 28. (The same applies to FIGS. 5 (b) and 5 (c)). Further, when applying an impact to the floor surface material 28, the impact may be applied using a tool such as a plastic hammer.

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

Here, as shown in FIG. 4A, when the search tools 30 and 40 are arranged on the non-overlapping portion 28b on the floor surface material 28, the natural frequencies Eb of the non-overlapping portion 28b are used. Vibration is applied to the diaphragms 32 and 42. In this case, the vibrating plate 42 having the same natural frequency E2 as the natural frequency Eb of the non-overlapping portion 28b resonates (see FIG. 4C), and the natural frequency E1 different from the natural frequency Eb of the non-overlapping portion 28b. The vibrating plate 32 having the above will not resonate (see FIG. 4B).

On the other hand, as shown in FIG. 5A, when the search tools 30 and 40 are arranged on the overlapping portion 28a on the floor surface material 28, each diaphragm 32 has the natural frequency Ea of the overlapping portion 28a. , 42 will be vibrated. In this case, the vibrating plate 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 vibrating plate 42 does not resonate (see FIG. 5C).

Therefore, after the vibration generation step, a confirmation step is performed to confirm whether or not the diaphragms 32 and 42 of the search tools 30 and 40 resonate due to the vibration generated in the floor surface material 28 by the vibration generation step. When the resonance of the diaphragm 42 is confirmed and the resonance of the diaphragm 32 is not confirmed by this confirmation step, as shown in FIGS. 4A to 4C, the search tools 30 and 40 are used. It can be grasped that the floor surface material 28 is arranged in the non-overlapping portion 28b. On the other hand, when the resonance of the diaphragm 32 is confirmed and the resonance of the diaphragm 42 is not confirmed by the confirmation step, as shown in FIGS. Can be grasped as being arranged in the overlapping portion 28a in the floor surface material 28. 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 surface material 28 are the same as the positions of the floor beams 26 in the beam arrangement direction. You can see that. 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 lumber 28.

In the series of steps including the arrangement step, the vibration generation step, and the confirmation step described above, the position of each of the search tools 30 and 40 on the floor surface material 28 is confirmed by the confirmation step, and the resonance of the diaphragm 32 is confirmed, and the vibration plate 42 The process is repeated while changing the positions of the search tools 30 and 40 in the beam arrangement direction until the position where resonance is not confirmed is reached. Then, when the positions of the search tools 30 and 40 on the floor surface material 28 are at positions where the resonance of the diaphragm 32 is confirmed and the resonance of the diaphragm 42 is not confirmed, the positions of the search tools 30 and 40 are based on the positions. The position of the floor beam 26 is searched (specified). When changing the positions of the search tools 30 and 40 in the beam arrangement direction, for example, the positions are changed by sliding the search tools 30 and 40 in the beam arrangement direction while arranging the search tools 30 and 40 on the floor surface material 28. ..

The above-mentioned arrangement step, vibration generation process, and confirmation step correspond to the "arrangement process", "vibration generation process", and "confirmation process" according to claim 1, respectively.

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

In the position search method of the floor beam 26 described above, it is confirmed whether or not the diaphragm 32 of the search tool 30 arranged on the floor surface material 28 resonates due to the vibration generated in the floor surface material 28, and the result of the confirmation is confirmed. The position of the floor beam 26 was searched based on the above. According to such a position search method, the position of the floor beam 26 can be searched regardless of the material of the floor beam 26. Further, the position of the floor beam 26 can be searched regardless of the material of the member existing around the floor beam 26. Therefore, the position of the floor beam 26 can be searched even if the underfloor heat insulating material 29 with the skin material 29a made of an aluminum sheet is provided around the floor beam 26. 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 search tools 30 and 40, a search tool 30 having a diaphragm 32 that resonates at the natural frequency Ea of the overlapping portion 28a and a search tool 40 having a diaphragm 42 that resonates at the natural frequency Eb of the non-overlapping portion 28b are used. Using. Then, it is confirmed whether or not the diaphragms 32 and 42 of the search tools 30 and 40 arranged on the floor surface material 28 resonate with each other due to the vibration generated in the floor surface material 28, and the floor is based on the result of the confirmation. The position of the beam 26 is searched. In this case, since the position of the floor beam 26 is searched for using two types of diaphragms 32 and 42 having different natural frequencies, the position of the floor beam 26 can be searched (specified) more reliably. It becomes.

The search tools 30 and 40 are configured to include the support portions 31, 41 and the diaphragms 32, 42 cantilevered by the support portions 31, 41. In such a configuration, the overhanging dimensions of the diaphragms 32 and 42 protruding from the support portions 31 and 41 depend on the natural frequencies of the diaphragms 32 and 42. Therefore, by adjusting the overhanging 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 overhanging 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, the search 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 surface 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 vibrating plate 32 that resonates was constructed, and a search tool 40 including a vibrating plate 42 that resonates at the obtained natural frequency Eb of the non-overlapping portion 28b was constructed. However, it is assumed that the natural frequency Ea of the overlapping portion 28a and the natural frequency Eb of the non-overlapping portion 28b cannot be obtained in advance. In that case, the natural frequency Ea of the overlapping portion 28a and the non-overlapping portion 28b may not be obtained. The natural frequency Eb of is unknown. Therefore, in this case, the position of the floor beam 26 cannot be searched by the position search method using the search 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 so that the position of the floor beam 26 can be searched. The position of the floor beam 26 is searched by using a search tool 50 different from the search tools 30 and 40 in the embodiment. Therefore, the position search method of the floor beam 26 in the present embodiment will be described below.

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

As shown in FIG. 6, each search tool 50 has a support 51 and a plurality of diaphragms 52 cantilevered and supported by the support 51. The support 51 is formed in a rod shape (square rod shape) by a steel square lumber. The support 51 may be made of another material such as wood or resin. Further, each search tool 50 corresponds to the "pair of search tools" according to claim 4, and each diaphragm 52 corresponds to the "plurality of vibrating bodies" according to claim 4.

Each diaphragm 52 is made of a flat plate-shaped steel plate having a small thickness, and is formed in a strip shape. In this embodiment, 10 diaphragms 52 are used as the diaphragms 52. The diaphragms 52 are arranged side by side in the longitudinal direction of the support 51 so that the longitudinal direction thereof is orthogonal to the longitudinal direction of the support 51, and in the arranged state, one end in the longitudinal direction is screwed 53 to the support 51. Is fixed by. As a result, each diaphragm 52 is fixed to the support 51 in a cantilever state. Further, each diaphragm 52 projects to the same side with respect to the support 51 in such a cantilever state. In addition, each diaphragm 52 may be fixed to the support 51 by using double-sided tape or an adhesive in addition to the screw 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 lengths (specifically, the lengths in the longitudinal direction) of the diaphragms 52 are different from each other. In the present embodiment, a to j are attached to the reference numerals 52 of the diaphragms 52 having different lengths, thereby distinguishing the diaphragms 52a to 52j. The lengths of the diaphragms 52a to 52j are increasing in the order of the diaphragm 52a → the diaphragm 52b → ... → the diaphragm 52i → the diaphragm 52j. Therefore, the length of the diaphragm 52a is the shortest, and the length of the diaphragm 52j is the longest.

The diaphragms 52a to 52j are arranged side by side so as to increase in length (longer) in order from the one on one side to the one on the other side in the longitudinal direction of the support 51. With this arrangement, the overhanging dimensions H from the support 51 of each of the diaphragms 52a to 52j increase in order from the one on one side to the one on the other side in the longitudinal direction of the support 51. As a result, the natural frequencies of the diaphragms 52a to 52j decrease in order from the one on one side to the one on the other side in the longitudinal direction of the support 51. In this case, among the diaphragms 52a to 52j, the natural frequency of the diaphragm 52a is the highest, and the natural frequency of the diaphragm 52j is the lowest.

Each of the diaphragms 52a to 52j is set so that the natural frequency decreases by a predetermined value from the one on one side to the one on the other side in the longitudinal direction of the support 51. In the present embodiment, the above-mentioned predetermined value is a fixed value. Therefore, in each of the diaphragms 52a to 52j, the natural frequencies of the support 51 in the longitudinal direction are reduced at equal intervals from one side to the other side.

As described above, in the search tool 50, since the natural frequencies of the vibrating plates 52a to 52j are set to different natural frequencies, the natural frequencies of the overlapping portions 28a are the same as those of the vibrating plates 52a to 52j. It is possible to include a vibrating plate 52 having a natural frequency and a vibrating plate 52 having the same natural frequency as the natural frequency of the non-overlapping portion 28b, respectively.

Next, a position search method for searching the position of the floor beam 26 using the pair of search tools 50 will be described with reference to FIG. 7. FIG. 7 is a diagram for explaining a method of searching for the position of the floor beam 26. Note that FIG. 7A shows a state in which each search tool 50 is arranged on the non-overlapping portion 28b on the floor surface material 28, and FIG. 7B shows a state in which one of the search tools 50 overlaps. It shows a state in which the other is arranged at 28a and the other is arranged at the non-overlapping portion 28b.

Further, also in the present embodiment, when searching for the position of the floor beams 26, it is assumed that the beam arrangement direction in which the floor beams 26 are lined up is known in advance. Further, the floor beams 26 are arranged at predetermined intervals W (equal intervals) in the beam arrangement direction, and the interval W of the floor beams 26 (specifically, the interval W of the adjacent floor beams 26) is also known in advance. It is assumed that

When searching for the position of the floor beam 26 using the pair of search tools 50, first, as shown in FIGS. 7 (a) or 7 (b), each search tool 50 is placed on the floor by each diaphragm 52. The arrangement step of arranging the beam 26 in the direction of arranging in the longitudinal direction on the floor material 28 is performed. In this arrangement step, in other words, each search tool 50 is arranged on the floor surface material 28 in a direction in which each support 51 extends parallel to each other in the longitudinal direction of the floor beam 26. Further, in the arrangement step, each search tool 50 is arranged on the floor surface material 28 so that each support 51 is at the same position in the longitudinal direction.

In the arranging step, the support 51 of each search tool 50 is placed on the surface of the floor surface material 28 (in other words, in a state of being in contact with each other), so that each search tool 50 is arranged on the floor surface material 28. In this case, the width of the support 51 of each search tool 50 is smaller than the width of the floor beam 26 in such a mounted state. Further, by the arrangement step, the diaphragms 52a to 52j in each search tool 50 are arranged apart from the floor surface material 28 upward, whereby the diaphragms 52a to 52j can vibrate up and down. At the time of the arrangement step, each support 51 may be temporarily fixed to the surface of the floor surface material 28 by using double-sided tape.

In the arranging step, in each search tool 50, each search tool 50 is arranged so that the arrangement order of the diaphragms 52a to 52j from one side to the other side in the longitudinal direction of the floor beam 26 is the same. Due to the arrangement of the search tools 50, the search tools 50 have the same size order of the overhanging dimensions H of the diaphragms 52a to 52j from one side to the other in the longitudinal direction, and thus each of them. The height order of the natural frequencies of the diaphragms 52a to 52j is the same.

Further, in the arrangement step, the interval L of the supports 51 of each search tool 50 (in other words, the interval L of each search tool 50 in the floor lumber 28) is smaller than the interval W of the floor beams 26 in the beam arrangement direction. Each search tool 50 is arranged so as to be. Specifically, each search tool 50 is arranged so that the distance L between the supports 51 of each search tool 50 is half (1/2) of the distance W of the floor beams 26.

Here, when each search tool 50 is arranged on the floor surface material 28 with the distance L between the supports 51 of each search tool 50 as described above, as shown in FIG. 7A, each search tool 50 will eventually be used. Is also arranged on the floor material 28 at the non-overlapping portion 28b, or as shown in FIG. 7B, one of the search tools 50 is arranged on the floor material 28 at the overlapping portion 28a. The other will be placed in the non-overlapping portion 28b. Therefore, in the following description, the arrangement pattern in which each search tool 50 is arranged on the floor surface material 28 as shown in FIG. 7A is referred to as a first arrangement pattern, and each search as shown in FIG. 7B. The arrangement pattern in which the tool 50 is arranged on the floor surface material 28 is called a second arrangement pattern.

After the arranging step, in a state where each search tool 50 is arranged on the floor surface material 28, a vibration generation step is performed in which the floor surface material 28 is vibrated by applying an impact to the floor surface material 28. Since this vibration generating step is the same step as the vibration generating step in the first embodiment, the description thereof is omitted here.

The vibration plates 52a to 52j of each of the search tools 50 arranged on the floor surface material 28 vibrate due to the vibration generated in the floor surface material 28 by the vibration generation step. Here, when each of the search tools 50 is arranged on the floor surface material 28 in the first arrangement pattern (see FIG. 7A) described above, that is, each of the search tools 50 is arranged on the non-overlapping portion 28b. In this case, vibration is applied to the diaphragms 52a to 52j of each search tool 50 at the natural frequency Eb of the non-overlapping portion 28b. In this case, the diaphragm 52 having the same natural frequency as the natural frequency Eb of the non-overlapping portion 28b resonates in each search tool 50. Therefore, in this case, the diaphragm 52 having the same natural frequency resonates in each search tool 50. In the example of FIG. 7A, the same diaphragm 52i resonates in each of the search tools 50, and each of the resonating diaphragms 52 is shown with a dot hatch.

On the other hand, when each search tool 50 is arranged on the floor surface material 28 in the second arrangement pattern (see FIG. 7B), that is, one of the search tools 50 is arranged in the overlapping portion 28a. When the other search tool 50 is arranged in the non-overlapping portion 28b, in one of the search tools 50, the vibration occurs at the natural frequency Ea of the overlapping portion 28a overlapping with the diaphragms 52a to 52j. In addition, in the other search tool 50, vibration is applied to the diaphragms 52a to 52j at the natural frequency Eb of the non-overlapping portion 28b. In this case, in one search tool 50, the vibrating plate 52 having the same natural frequency Ea as the natural frequency Ea of the overlapping portion 28a resonates, and in the other search tool 50, the same natural frequency Eb as the natural frequency Eb of the non-overlapping portion 28b. The vibrating plate 52 having a frequency will resonate. Therefore, in this case, the diaphragm 52 having a different natural frequency resonates in each search tool 50. In the example of FIG. 7B, the diaphragm 52b resonates in one of the search tools 50, and the diaphragm 52i resonates in the other search tool 50. Further, in FIG. 7B, dot hatches are attached to the resonating diaphragms 52b and 52i.

As described above, the diaphragm 52 that resonates in each search tool 50 due to the vibration generation process differs depending on the arrangement pattern of each search tool 50 in the floor surface material 28. Therefore, in view of these points, after the vibration generation step, the vibrations generated in the floor surface material 28 by the vibration generation step cause the vibration plates 52a to 52j in each of the search tools 50 arranged on the floor surface material 28. Which of them resonates, the resonating vibrating plate 52 (hereinafter referred to as the resonating vibrating plate 52A) is specified, and whether or not the resonating vibrating plate 52A of each of the specified search tools 50 has different natural frequencies. Perform a confirmation process to confirm whether or not.

When it is confirmed by the confirmation step that the resonance diaphragm 52A of each search tool 50 has the same natural frequency, each search tool 50 is arranged in the floor surface material 28 in the first arrangement pattern. It can be grasped that there is. That is, in this case, it can be grasped that each of the search tools 50 is arranged on the non-overlapping portion 28b on the floor surface material 28. In the example of FIG. 7A, the resonance diaphragm 52A of each search tool 50 is the diaphragm 52i.

On the other hand, when it is confirmed by the confirmation step that the resonance diaphragm 52A of each search tool 50 has a different natural frequency, each search tool 50 has a second arrangement pattern on the floor surface material 28. It can be grasped that it is arranged in. That is, in this case, it is understood that one of the search tools 50 is arranged on the overlapping portion 28a on the floor surface material 28, and the other search tool 50 is arranged on the non-overlapping portion 28b. be able to. In the example of FIG. 7B, one of the resonance diaphragms 52A of each search tool 50 is the diaphragm 52b, and the other is the diaphragm 52i.

Here, in the floor surface 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 each of the search tools 50 is arranged in the second arrangement pattern, the resonance vibration plate 52A of the resonance vibration plate 52A that resonates with each search tool 50 has a higher natural frequency (FIG. 7 (b)). In the example of), the vibrating plate 52b) resonates at the natural frequency Ea of the overlapping portion 28a, and the resonance vibrating plate 52A on the side where the natural frequency is low (the vibrating plate 52i in the example of FIG. 7B) does not overlap the non-overlapping portion 28b. It will resonate at the natural frequency Eb of. Therefore, in this case, the search tool 50 having the resonance vibrating plate 52A on the high natural frequency side (hereinafter referred to as the search tool 50 on the high natural frequency side) is arranged on the overlapping portion 28a on the floor surface material 28 and is unique. The search tool 50 having the resonance vibration plate 52A on the low frequency side (hereinafter referred to as the search tool 50 on the low natural frequency side) is arranged in the non-overlapping portion 28b of the floor surface material 28. Therefore, in this case, the position of the search tool 50 on the floor surface material 28 on the side where the natural frequency is high is the same as the position of the floor beam 26 in the beam arrangement 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 arrangement step, the vibration generation step, and the confirmation step described above, the position of each search tool 50 on the floor surface material 28 is different depending on the confirmation step, and the resonance vibration plate 52A of each search tool 50 has a different natural frequency. The process is repeated while changing the position of each search tool 50 in the beam arrangement direction until the position is confirmed to be possessed. Then, when the position of each search tool 50 on the floor surface material 28 is a position where it is confirmed that the resonance vibration plate 52A of each search tool 50 has a different natural frequency, the natural frequency of each of the search tools 50 is confirmed. The position of the floor beam 26 is searched (specified) based on the position of the search tool 50 having the resonance vibrating plate 52A on the higher side. When changing the position of each search tool 50 in the beam arrangement direction, for example, the position is changed by sliding each search tool 50 in the beam arrangement direction while being arranged on the floor surface material 28.

The above-mentioned arrangement step, vibration generation step, and confirmation step correspond to the “arrangement step”, “vibration generation step”, and “confirmation step” according to claim 4, respectively.

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

According to the position search method of the floor beam 26 in the present embodiment described above, as in the position search method in the first embodiment, the floor beam 26 exists regardless of the material of the floor beam 26 and around the 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 preferably searched. Further, in the position search method of the present embodiment, the position of the floor beam 26 can be suitably searched even if the natural frequencies of the overlapping portion 28a and the non-overlapping portion 28b in the floor surface material 28 are unknown.

Each search tool 50 includes a long support 51 and a plurality of diaphragms 52a to 52j that are cantilevered and supported by the support 51. Further, the natural frequencies of the diaphragms 52a to 52j are made different from each other by making the overhanging dimensions from the support 51 different from each other in the diaphragms 52a to 52j. In this case, by adjusting the overhanging dimensions of the diaphragms 52a to 52j, the diaphragms 52a to 52j having different natural frequencies can be obtained. Therefore, the search tool 50 according to the present embodiment can be obtained relatively easily.

Further, when confirming whether or not the resonating diaphragm 52 (resonant diaphragm 52A) in each search tool 50 has different natural frequencies, the overhanging dimensions of the resonance diaphragm 52A are compared. It can be confirmed by. Therefore, there is an advantage that such confirmation can be facilitated.

In each search tool 50, the diaphragms 52a to 52j were arranged side by side in the order of the height of the natural frequency. Then, when each of the search tools 50 is arranged on the floor surface material 28, in each of the search tools 50, the arrangement order of the diaphragms 52a to 52j from one side to the other side in the longitudinal direction of the floor beam 26 is arranged. Arranged so that they are the same. In this case, in each of the search tools 50, the order of the natural frequencies of the diaphragms 52a to 52j from one side to the other in the longitudinal direction is the same, so that the resonance diaphragm of each search tool 50 is used. When confirming whether or not 52A has natural frequencies different from each other, it is possible to facilitate the confirmation.

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

(1) In the first embodiment, the positions of the floor beams 26 are searched using two types of search tools 30 and 40. Of these search tools 30 and 40, the search tool 30 (in the first search tool) The position of the floor beam 26 may be searched using only (corresponding). In this case, in the arrangement process, the search tool 30 (only) is arranged on the floor surface material 28, and in the vibration generation process, an impact is applied to the floor surface material 28 in the arranged state of the search tool 30 to vibrate the floor surface material 28. Give rise. Then, in the confirmation step, it is confirmed whether or not the vibration plate 32 of the search tool 30 arranged on the floor surface material 28 resonates due to the vibration generated in the floor surface material 28, and the resonance of the diaphragm 32 is confirmed by the confirmation step. When 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. Also in this case, the position of the floor beam 26 can be preferably searched from the surface side of the floor material 28.

(2) In the first embodiment, the diaphragms 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), but vibration is performed as the vibrating body of the searching tool. Those other than the plates 32 and 42 may be used. For example, it is conceivable to use a tuning fork as a diaphragm. In this case, the first tuning fork that resonates (resonates) with the natural frequency of the overlapping portion 28a is used for the first search tool, and the second tuning fork that resonates (resonates) with the natural frequency of the non-overlapping portion 28b for the second search tool. It is conceivable to use a tuning fork.

(3) In the second embodiment, the diaphragm 52 is used as the vibrating body of the search tool 50, but a vibrating body other than the diaphragm may be used as the vibrating body of the search tool. For example, it is conceivable to use a liquid contained in a tubular container as the vibrating body. Specifically, in this case, as shown in FIG. 8, a search tool 60 having a plurality of tubular containers 61 arranged in a row and connected to each other and a liquid 63 contained in each tubular container 61 is provided. It is conceivable to configure. In this case, the depths of the liquids 63 in the tubular containers 61 are different from each other, and the natural frequencies of the liquids 63 are different from each other due to the difference. Therefore, in the search tool 60, as the liquid 63, the liquid 63 having 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 if the search tool 60 is used, the position of the floor beam 26 can be searched 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 beam 26 (corresponding to a long member) juxtaposed on the back surface side of the floor surface material 28 (corresponding to the face material), the position search of the present invention is performed. Although the method was used, the position search method of the present invention can also be applied when searching for a long lumber 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 surface side (upper surface side) of the ceiling surface material 27. Therefore, when searching for the position of the ceiling beam 25 (corresponding to a long material) from the surface side (lower surface side) of the ceiling surface material 27 (corresponding to the face material), the position search method of the present invention may be used.

When searching for the position of the ceiling beam 25, for example, it is conceivable to search using the search tools 30 and 40 in the first embodiment. In this case, in the arrangement step, the search tools 30 and 40 are arranged on the surface of the ceiling surface material 27. In this arrangement, the support portions 31, 41 of the search tools 30 and 40 are arranged on the surface of the ceiling surface material 27 (in contact with each other), and the support portions 31, 41 are temporarily attached to the ceiling surface material 27 in the arranged state. Fix it. In this case, it is conceivable that the support portions 31 and 41 are formed of a small wooden square timber, and the support portions 31 and 41 are temporarily fixed by using, for example, double-sided tape. Then, in the vibration generation step, an impact is applied to the ceiling surface material 27 in the arranged state of the search tools 30 and 40 to generate vibration in the ceiling surface material 27. Then, it is confirmed whether or not the diaphragms 32 and 42 of the search tools 30 and 40 arranged on the ceiling surface material 27 resonate due to the vibration generated in the ceiling surface material 27, and based on the result of the confirmation, the ceiling is small. The position of the beam 25 is searched.

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

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

When a pendulum type search tool is used, the pendulum type search tool includes a long support arranged on the ceiling surface material 27 and a plurality of pendulums suspended from the support and arranged in the longitudinal direction of the support. It is composed of and. The suspension lengths from the supports of the plurality of pendulums are different from each other, and the natural frequencies at the time of vibration are different from each other due to the difference. When searching for the position of the ceiling beam 25 using such a pendulum type search tool, each pendulum type search tool is arranged with its support temporarily fixed to the surface of the ceiling surface material 27, and the support thereof is arranged. The ceiling surface material 27 is vibrated in the arranged state. Then, by the vibration, which of the pendulums resonates in each pendulum type search tool is specified, and the resonating pendulum (hereinafter referred to as a resonance pendulum) is specified, and the resonance pendulums of the specified pendulum type search tools are different from each other. Make sure that you have a 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 beam 25 can be preferably searched.

(7) In the second embodiment, in the search tool 50, the natural frequencies of the diaphragms 52 are made different from each other by making the overhanging dimensions H of the diaphragms 52 from the support 51 different from each other. However, by changing this, for example, the width dimensions of the diaphragms 52 may be different from each other, or the thickness of the diaphragms 52 may be different from each other, so that the natural frequencies of the diaphragms 52 may be different from each other. good.

(8) In each of the above 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 is a building constructed by a steel frame construction method or a conventional wooden structure. It can also be applied to buildings with other construction methods, such as buildings constructed with the construction method. For example, in a building constructed by the conventional method, a plurality of long wooden timbers may be arranged side by side on the back side of the face material, and the position of these long wooden timbers is from the front side of the face 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 long lumber can be searched regardless of the material of the long lumber. Therefore, even if the long lumber is made of wood, the position can be preferably searched. can.

20 ... Building unit, 26 ... Floor beam as a long material, 28 ... Floor surface material as a face material, 28a ... Overlapping part, 28b ... Non-overlapping part, 30 ... Search tool as a first search tool, 31 ... Support part, 32 ... diaphragm as first vibrating body, 40 ... search tool as second search tool, 41 ... support part, 42 ... diaphragm as second vibrating body, 50 ... search tool, 51 ... support , 52 ... A diaphragm as a vibrating body.

Claims (6)

It is applied to a building in which a plurality of long materials supporting the face material are arranged side by side at predetermined intervals on the back surface side of the face material, and a search tool is used to search the position of the long material from the front surface side of the face material. It is a method of searching for the position of long lumber.
The face material has an overlapping portion that overlaps with the long material and a non-overlapping portion that does not overlap with the long material in the thickness direction.
The search tool has a vibrating body that resonates when a vibration having the same frequency as the natural frequency of the overlapping portion obtained in advance is applied.
An arrangement step of arranging the search tool in contact with the surface of the face material, and
In the arrangement state of the search tool by the arrangement step, a vibration generation step of causing vibration in the face material by applying an impact to the face material, and a vibration generation step.
It is provided with a confirmation step of confirming whether or not the vibrating body of the search tool arranged on the face material resonates due to the vibration generated on the face material by the vibration generation step.
A method for searching the position of a long material, which comprises searching for the position of the long material based on the position of the search tool on the face material when the resonance of the vibrating body is confirmed by the confirmation step. The search tool is a first search tool having a first vibrating body as the vibrating body.
It is a position search method for a long lumber that searches for the position of the long lumber using the first search tool and the second search tool.
The second search tool has a second vibrating body that resonates when a vibration having the same frequency as the natural frequency of the non-overlapping portion obtained in advance is applied.
In the arrangement step, the first search tool and the second search tool are arranged in a state of being in contact with the surface of the face material at the same position in the arrangement direction in which the long lumbers are lined up.
In the vibration generation step, vibration is generated in the face material in the arrangement state of each search tool by the arrangement step.
In the confirmation step, it is confirmed whether or not the first vibrating body and the second vibrating body of each of the search tools arranged on the face material resonate due to the vibration generated in the face material.
When the resonance of the first vibrating body is confirmed and the resonance of the second vibrating body is not confirmed by the confirmation step, the position of the long member is determined based on the position of each search tool in the face material. The method for finding the position of a long material according to claim 1, wherein the search is performed. The search tool has a support portion and a diaphragm as the vibrating body that is cantilevered and supported by the support portion.
The position search method for a long member according to claim 1 or 2, wherein in the placement step, the search tool is placed in a state where the support portion is in contact with the surface of the face material. A pair of search tools are applied to a building in which a plurality of long timbers supporting the face timber are arranged side by side at predetermined intervals on the back surface side of the face timber, and the position of the long timber is found from the front surface side of the face timber. It is a method of searching for the position of a long lumber to be searched using.
Each of the search tools has a plurality of vibrating bodies arranged in a predetermined direction and having different natural frequencies.
The search tool is provided with an arrangement step of arranging each of the search tools in a direction in which each of the vibrating bodies is arranged in the longitudinal direction of the long member and in contact with the surface of the face member.
In the arrangement step, the search tools are arranged so that the distance between the search tools in the face material is smaller than the predetermined distance in the arrangement direction in which the long lumbers are lined up.
In the arrangement state of each search tool by the arrangement step, a vibration generation step of causing vibration in the face material by applying an impact to the face material, and a vibration generation step.
In each of the search tools arranged on the face material due to the vibration generated on the face material by the vibration generation step, which of the vibrating bodies resonates is specified as the resonating vibrating body, and the resonating vibrating body is specified as the resonating vibrating body. It is provided with a confirmation step of confirming whether or not the resonant vibrating bodies of the identified search tools have different natural frequencies.
When it is confirmed by the confirmation step that the resonant vibrating body of each of the search tools has a different natural frequency, the resonant vibrating body having the resonance vibrating body on the higher natural frequency side of the resonant vibrating bodies is provided. A method for searching the position of a long material, which comprises searching the position of the long material based on the position of the search tool on the face material. Each of the search tools has a long support extending in the predetermined direction, and has a plurality of diaphragms cantilevered and supported by the support as the vibrating body.
In the arrangement step, when the search tools are arranged on the face material, the supports of the search tools come into contact with the surface of the face material in a direction extending in the longitudinal direction of the long member. In addition to arranging the long timbers in such a state, the intervals of the supports of the respective search tools are arranged so as to be different from the predetermined intervals in the arrangement direction of the long timbers.
The claim is characterized in that, in each of the search tools, the overhanging dimensions of the diaphragms are different from each other, and the natural frequencies of the diaphragms are different from each other due to the difference. Item 4. The method for searching the position of a long material according to Item 4. In each of the search tools, the vibrating bodies are arranged so that the natural frequency increases in order from the one on one side to the one on the other side in the predetermined direction.
In the arrangement step, when the search tools are arranged on the face material, the arrangement order of the vibrating bodies from one side to the other side in the longitudinal direction of the long member is the same in each search tool. The method for finding the position of a long lumber according to claim 4 or 5, wherein the lumber is arranged so as to be.

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