JP6150659B2 - Roof deterioration judgment method - Google Patents

Description

  The present invention relates to a technique of a roof deterioration determination method, and more particularly to a technique of a method for determining the degree of deterioration of a field plate constituting a roof.

  Conventionally, the technique of the roof deterioration determination method has been publicly known. For example, as described in Patent Document 1.

In the technique described in Patent Document 1, images of roofs taken from above the roof at different times can be compared, and the degree of roof deterioration (such as the occurrence of rust) can be determined from changes in pixel values.
However, although the technique described in Patent Document 1 can be applied to a building using a steel plate or a plated steel plate as a roofing material in a factory or a warehouse, it is difficult to apply to other buildings. .

  In particular, as shown in FIG. 6, in the roof in which roofing 102 is laid on the field board 101 and the rooftop 103 is covered with the tile 103 (tile roof), the degree of deterioration is determined from the appearance of the roof as described below. It is difficult to do.

  In such a tiled roof, when the roofing 102 deteriorates (hardens) and the waterproofness of the portion where the nail 104 fixing the roof tile 103 is lowered decreases, rainwater flows along the roof 102 and the roof 102. It penetrates between the main plate 101. The rainwater gradually enters the base plate 101 and deteriorates the base plate 101. When the field board 101 deteriorates in this way, the upper part of the field board 101 is covered with the tile 103, and therefore the degree of deterioration of the field board 101 is determined from the appearance of the roof (viewing from the top, photographing, etc.). It is difficult.

  Further, a method of observing the field plate from the back of the hut (below the roof) and determining the degree of deterioration of the field plate from the trace of water remaining on the field plate (water penetration) is also conceivable. However, since the trace of water is confirmed on the base plate for the first time in a state in which the deterioration has progressed considerably, it is difficult to determine the degree of early deterioration by this method. Therefore, it is conceivable to measure the moisture content of the field plate from the back of the hut using a measuring instrument (moisture meter), and estimate the degree of deterioration from the measured moisture content. Since the moisture content of the main plate increases, it is difficult to accurately determine the degree of deterioration.

Japanese Patent No. 5090062

  The present invention has been made in view of the above situation, and a problem to be solved is to provide a roof deterioration determination method capable of easily determining the degree of deterioration of a field board. .

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, according to claim 1, there is provided a roof deterioration determination method for determining a degree of deterioration of a field plate, a detection step of detecting a rebound speed ratio of the field plate, and a degree of deterioration of the field plate from the rebound speed ratio. And a determination step for determining.

  According to a second aspect of the present invention, the rebound rate ratio of the field board is detected at the time of rafters that support the field board.

  According to a third aspect of the present invention, the rebound speed ratio of the field board is detected at a portion excluding an end of the field board.

  According to a fourth aspect of the present invention, the rebound speed ratio of the field board is detected at a plurality of locations on the field board.

  According to a fifth aspect of the present invention, the determination step uses the first map showing the relationship between the repulsion speed ratio of the field plate and the holding force of the nail, which is created in advance, and the rebound of the field plate detected in the detection step. It includes a holding force determination step of determining the nail holding force from the speed ratio.

  In Claim 6, the said determination process uses the 2nd map which shows the mode of aged deterioration of the holding power of the nail | claw of the said field board under the normal conditions created beforehand, and the actual building age of the roof and the said It includes a deterioration comparison step of determining the actual degree of deterioration of the field board relative to the deterioration of the field board under normal conditions from the holding force of the nail determined in the holding force determination process.

  As effects of the present invention, the following effects can be obtained.

  In claim 1, the degree of deterioration of the base plate can be easily determined.

  According to the second aspect of the present invention, it is possible to reduce the deflection of the base plate when measuring the repulsion speed ratio as much as possible, and more accurately determine the degree of deterioration of the base plate.

  According to the third aspect of the present invention, it is possible to minimize the deflection of the base plate when measuring the repulsion speed ratio, and more accurately determine the degree of deterioration of the base plate.

  According to the fourth aspect of the present invention, it is possible to more accurately determine the degree of deterioration of the field board by using the detection results at a plurality of locations.

  According to the fifth aspect, the degree of deterioration of the base plate can be determined using the holding force of the nail.

  According to the sixth aspect of the present invention, it is possible to determine how much the field base plate to be determined has deteriorated compared to the deterioration of the field base plate assumed under normal conditions.

The perspective view which showed schematic structure of the roof used as the object of determination of deterioration. (A) The figure which showed the process of the deterioration determination method of the roof which concerns on this embodiment. (B) The figure which showed the content of the determination process in detail. The figure which looked at the field plate from the hut back side (A arrow line view in FIG. 1). (A) The figure which showed the 1st map. (B) The figure which showed the 2nd map. The figure which showed the 1st map with which the 1st reference value and the 2nd reference value were described. The cross-sectional schematic diagram which showed the mode of flooding of the conventional roof of a tiled roof.

  First, the outline of the structure of the roof 1 will be described with reference to FIG.

  The roof 1 includes a purlin 2, a large girder 4, a rafter 6, and a base plate 8. A plurality of rafters 6 are attached so as to extend from the purlin 2 spanned in the horizontal direction at the highest position of the roof 1 to the large girder 4 spanned in parallel with the purlin 2 on the outermost side of the roof 1. The rafters 6 are arranged at a predetermined interval from each other. On the rafter 6, a field board 8 that is the foundation of the roof 1 is spread. The field plate 8 is fixed to the rafter 6 by hitting nails (not shown) at appropriate locations. A roofing for roofing (asphalt roofing) (not shown) is laid on the field board 8 laid in this way, and a tiled roof 1 is constructed by spreading a tile (not shown) from above. .

  Next, the deterioration determination method for the roof 1 according to the present embodiment will be described with reference to FIGS.

  As shown to Fig.2 (a), the deterioration determination method of the roof 1 is comprised from detection process S100 and determination process S200.

  The detection step S100 is a step of detecting the repulsion speed ratio of the field board 8. Below, the said detection process S100 is demonstrated concretely.

  In the detection step S100, the repulsion speed ratio of the field board 8 is detected using the measuring device 10 from the back of the shed (downward).

  Here, the measuring device 10 is a device that can detect the repulsion speed ratio of the object to be measured (in this embodiment, the base plate 8). In addition, the repulsion speed ratio means that the detection body of the measuring device 10 strikes the surface of the field plate 8 and the detection body strikes the surface of the field plate 8, and the detection body of the field plate 8 It is the ratio of the speed when rebounding from the surface. The measuring device 10 can hit the base plate 8 with the detection body and detect the repulsion speed ratio of the base plate 8.

  As shown in FIG. 3, the repulsion speed ratio of the field board 8 is detected at the position P1, the position P2, and the position P3 of the rafter 6 of the field board 8 (position as close as possible to the rafter 6). That is, in the field plate 8, the rebound speed ratio of the field plate 8 is not detected in the region T <b> 1 near the middle portion of the adjacent rafters 6. This is because the farther away from the rafter 6 to which the field plate 8 is fixed, the easier it is for the field plate 8 to bend when the repulsion speed ratio is detected by the measuring device 10, and the detection accuracy is lowered.

  For the same reason (the bending of the base plate 8 is likely to occur), the rebound speed ratio of the base plate 8 is not detected in the region T2 near the end of the base plate 8.

  Moreover, the repulsion speed ratio of the field plate 8 is detected at each of a plurality of positions (in the present embodiment, three positions of position P1, position P2, and position P3). By detecting at a plurality of positions in this way, it can be easily found that a detection error has occurred. Specifically, if only one of the three detection values is significantly different, the detection is considered a mistake. Similarly, a detection error can be found when four or more repulsion speed ratios are detected. Furthermore, even if the rebound rate ratio is detected at two locations, if detection values that differ greatly from each other are obtained, it is considered that one of them is a detection error. Can be obtained.

  In addition, the rebound speed ratio of the base plate 8 is detected at a plurality of positions, and the average value thereof is used as a detection value, thereby averaging the measurement error occurring at the time of detection at each position and increasing the accuracy of the detection value It can also be increased. In the present embodiment, one value (average value) obtained by averaging the resilience speed ratios detected at three locations is used as the detection value (device value M).

  In the detection step S100, after detecting the repulsion speed ratio of the target base plate 8, the process proceeds to the determination step S200.

  The determination step S200 is a step of determining the degree of deterioration of the base plate 8 from the device value M (repulsion speed ratio) detected in the detection step S100. As shown in FIG. 2B, the determination step S200 further includes a holding force determination step S201 and a deterioration comparison step S202.

  The holding force determination step S201 is a step of determining the nail holding force H of the base plate 8. Below, the said holding power determination process S201 is demonstrated concretely.

  In the holding force determination step S201, the nail holding force H of the field plate 8 is determined from the device value M (repulsion speed ratio) of the field plate 8 detected in the detection step S100 using the first map created in advance. Determined.

  Here, the holding force H of the nail is a value of a force necessary for pulling out the nail driven into the field board. The holding force H of the nail indicates one of the performances of the field board, and takes different values depending on the material of the field board and the degree of deterioration.

  In addition, as shown in FIG. 4A, the first map shows the relationship between the device value M (repulsion speed ratio) of the field board and the nail holding force H of the field board. The first map is obtained by performing a test (nail pull-out test) for detecting the nail holding force H on the base plate from which the device value M is detected using the measuring device 10 (or simulation analysis). Etc.), can be created. The first map is created in advance.

  As shown in the first map, there is a certain relationship between the device value M (repulsion speed ratio) of the base plate and the holding force H of the nail. Therefore, the holding power H of the nail of the field board 8 can be determined by applying the device value M detected in the detection step S100 of the present embodiment to the first map.

  In the holding force determination step S201, the nail holding force H of the base plate 8 is determined from the device value M, and then the process proceeds to the deterioration comparison step S202.

  The deterioration comparison step S202 is a step of determining the actual degree of deterioration of the field board 8 relative to the deterioration of the field board under normal conditions. Below, the said deterioration comparison process S202 is demonstrated concretely.

  In the deterioration comparison step S202, the degree of deterioration of the field board 8 is determined from the age Y of the roof 1 and the nail holding force H determined in the holding force determination step S201 using a second map created in advance. Is done.

  Here, as shown in FIG. 4 (b), the second map shows the state of aging deterioration of the holding power H of the baseboard nail under normal conditions. “Normal conditions” means the general environment (weather, temperature, etc.), and special factors that have a special effect on the degradation of field boards (eg extremely high temperatures or extremely strong) It means conditions without wind and rain (abnormal weather etc.). The second map can be created by calculating the state of aging deterioration of the holding power H of the baseboard nail in a general environment using simulation analysis (or by performing a test).

  In the present embodiment, it is assumed that the main factor for degrading the field board is the temperature, and the second map shows the state of the aging degradation of the holding power H of the field board nail at a predetermined temperature (normal conditions). It shall be shown.

  As the second map shows, the field board deteriorates with the passage of years, so that the holding power H of the nail of the field board also decreases (age deterioration) with the passage of years. Aged deterioration (curve L) of the holding force H of the nail shown in the second map is assumed under normal conditions. For this reason, when the holding power H of the actual nail of the field board 8 is located (larger) above the curve L of the second map in the age of the field board 8, the degree of deterioration of the field board 8 is It can be determined that it is smaller than normal. In addition, when the actual holding power H of the nail of the field base plate 8 is located lower (smaller) than the curve L of the second map in the age of the field base plate 8, the degree of deterioration of the field base plate 8 is normal. It can be determined that it is greater than

  Below, holding power determination process S201 and deterioration comparison process S202 are demonstrated using a specific example.

  As shown in FIG. 4 (a), the rebound speed ratio of one field plate 8 (hereinafter simply referred to as “first field plate 8”) is detected on the roof 1 of the building age Y1 (detection step S100). As a result, it is assumed that M1 is obtained as the device value M. Further, as a result of detecting the repulsion speed ratio of another field plate 8 (hereinafter simply referred to as “second field plate 8”), it is assumed that M2 (M1 <M2) is obtained as the device value M.

  In the holding force determination step S201, it is determined that the holding force H of the nail corresponding to the device value M1 of the first field board 8 is H1, using the first map shown in FIG. Further, it is determined that the nail holding force H corresponding to the device value M2 of the second field board 8 is H2 (H2 <H1).

  Next, in the deterioration comparison step S202, the nail holding force H1 of the first field board 8 and the second field board 8 at the building age Y1 of the roof 1 using the second map shown in FIG. The holding force H2 is compared with the curve L.

In the present embodiment, the value of the holding force H on the curve L at the building age Y1 is Ht.
The nail holding force H1 of the first base plate 8 is larger than the holding force Ht. Therefore, it can be determined that the deterioration of the first base plate 8 is not progressing more than the deterioration under normal conditions, that is, in a good state.
On the other hand, the nail holding force H2 of the second base plate 8 is smaller than the holding force Ht. Therefore, it can be determined that the deterioration of the second base plate 8 is more advanced than the deterioration under normal conditions, that is, a poor state.

As described above, the deterioration determination method for the roof 1 according to the present embodiment is as follows.
A method for determining the deterioration of the roof 1 for determining the degree of deterioration of the field plate 8,
A detection step S100 for detecting the repulsion rate ratio of the base plate 8 from the back of the hut;
A determination step S200 for determining the degree of deterioration of the base plate 8 from the repulsion rate ratio;
It comprises.
By configuring in this way, the degree of deterioration of the field board 8 can be easily determined.

The rebound speed ratio of the field board 8 is detected at the time of the rafter 6 that supports the field board 8.
By comprising in this way, the deflection of the baseplate 8 at the time of measuring a repulsion speed ratio can be decreased as much as possible, and the extent of deterioration of the baseplate 8 can be determined more correctly by extension.

Further, the repulsion speed ratio of the field board 8 is detected in a portion excluding the end part of the field board 8.
By comprising in this way, the deflection of the baseplate 8 at the time of measuring a repulsion speed ratio can be decreased as much as possible, and the extent of deterioration of the baseplate 8 can be determined more correctly by extension.

Further, the repulsion speed ratio of the field board 8 is detected at a plurality of locations on the field board 8.
By comprising in this way, the grade of deterioration of the field board 8 can be determined more correctly by using the detection result of several places. For example, when a detection result extremely different from other detection results (detection values) is obtained, it can be determined that the detection is a mistake. Moreover, the accuracy of a detection value can also be improved by using the average value of the detection result of several places as a detection value.

In addition, the determination step S200 includes:
Using the first map showing the relationship between the rebound speed ratio of the field board 8 and the nail holding force H, which is created in advance, the nail holding force H is calculated from the rebound speed ratio of the field board 8 detected in the detection step S100. It includes a holding force determination step S201 for determination.
With this configuration, the degree of deterioration of the base plate 8 can be determined using the nail holding force H.

In addition, the determination step S200 includes:
It was determined in the actual building age Y of the roof 1 and the holding force determination step S201 using the second map showing the state of aging deterioration of the holding force H of the nail of the baseboard 8 under normal conditions created in advance. It includes a deterioration comparison step S202 for determining the actual degree of deterioration of the field board 8 relative to the deterioration of the field board 8 under normal conditions from the nail holding force H.
By comprising in this way, it can be determined how much the field board 8 used as a judgment object has deteriorated compared with the deterioration of the field board 8 assumed on normal conditions. Thereby, it is possible to determine whether or not the deterioration of the base plate 8 to be determined is an appropriate deterioration in light of the building age Y.

  In the present embodiment, in the detection step S100, the rebound speed ratio of the base plate 8 is detected at three locations, but the present invention is not limited to this. That is, it is possible to detect at two places or four or more places. Although it is possible to detect at one place, it is desirable to detect at a plurality of places in order to improve detection accuracy.

  Moreover, in this embodiment, when detecting the repulsion speed ratio of the field board 8 in the detection step S100, it is detected only on the left and right sides of one rafter 6. However, the present invention is not limited to this. is not. That is, detection can be performed on both the left and right sides, and the detection location can be arbitrarily selected.

Further, in the present embodiment, after determining the holding power H of the nail of the base plate 8 in the holding power determination step S201, it is further determined whether or not the deterioration is appropriate in light of the building age Y in the deterioration comparison step S202. Although the determination is made, the present invention is not limited to this. That is, it is also possible to determine the degree of deterioration simply using the nail holding force H of the base plate 8 determined in the holding force determination step S201.
In this case, for example, as shown in FIG. 5, a first reference value Ha and a second reference value Hb that serve as a reference when determining the degree of deterioration are determined in advance, and the nail holding force H is equal to or greater than the first reference value Ha. When there is no abnormality, the nail holding force H is greater than or equal to the second reference value Hb and less than the first reference value Ha, “deterioration has occurred”, and the nail holding force H is the second reference value. When it is less than Hb, it is possible to determine the degree of deterioration of the base plate 8 step by step, such as “remarkably deteriorated”.

  Various determinations in each process (for example, determination of the nail holding force H based on the device value M in the holding force determination step S201) are automatically performed using a control device (such as a personal computer). Also good.

1 Roof 2 Purlin 4 Large girder 6 Rafter 8 Field plate 10 Measuring instrument

Claims (6)

A roof deterioration judging method for judging the degree of deterioration of a field board,
A detection process for detecting the rebound speed ratio of the field plate,
A determination step of determining the degree of deterioration of the base plate from the rebound speed ratio;
A method for determining deterioration of a roof comprising: The rebound speed ratio of the field plate is detected at the rafter supporting the field plate,
The roof deterioration determination method according to claim 1. The rebound speed ratio of the field plate is detected at a portion excluding an end of the field plate.
The roof deterioration determination method according to claim 1 or 2. The rebound speed ratio of the field plate is detected at a plurality of locations of the field plate.
The method for determining deterioration of a roof according to any one of claims 1 to 3. The determination step includes
Retaining the nail holding force based on the repelling speed ratio of the field plate detected in the detection step using a first map showing the relationship between the repelling speed ratio of the field plate and the nail holding force prepared in advance. Including force judgment process,
The method for determining deterioration of a roof according to any one of claims 1 to 4. The determination step includes
The nail retention determined in the step of determining the actual age of the roof and the retention force using the second map showing the state of aging degradation of the retention strength of the nail of the baseboard under normal conditions prepared in advance From a force, including a deterioration comparison step of determining the actual degree of deterioration of the field board relative to the deterioration of the field board under normal conditions,
The roof deterioration determination method according to claim 5.

Images