Fixture for measurement pin installation and measurement pin installation method

Abstract

To easily install a measurement pin without using a stepladder nor a portable workbench even if the measurement pin used to measure a thickness of a coating material should be installed at a high place in installing the measurement pin on an object surface.SOLUTION: As a fixture for installing a measurement pin 60, used to measure a thickness of a coating material constructed on an object surface, on the object surface, there is provided a fixture 10 for measurement pin installation which has a perch part 11 and a holding part 20 which is provided atop of the perch part and can hold the measurement pin with magnetic force.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a jig and a method for installing a measurement pin used for measuring the thickness of a coating material applied to a target surface such as a wall or a ceiling on the target surface.

Background Art

[0002] As a method for providing a heat insulating material on a wall or a ceiling of a building, there is known a method in which an operator sprays a foam stock solution obtained by adding a foaming agent to a main raw material onto a target surface and causes it to foam and solidify. Since the heat insulating effect of such a heat insulating material greatly depends on its thickness, it is required to have a uniform thickness, and the thickness error is required to be suppressed to 0 to 20 mm, and in severe cases, 0 to 5 mm. The uniformity of the thickness of the spray-applied heat insulating material greatly depends on the skill level of the operator. Therefore, conventionally, while performing the spraying operation, a needle-shaped measurement gauge is inserted into various parts of the foam-solidified heat insulating material to measure the thickness, and the excess part is cut off at the parts that are too thick, and additional finishing treatment is performed at the parts that are too thin. The operation of checking the thickness of the heat insulating material has been a complicated operation. In addition, in this thickness checking operation, there has been a problem that only measured values at scattered positions where the measurement gauge is inserted can be obtained, and sufficient quality control cannot be performed.

[0003] On the other hand, the present applicant has installed three or more markers on the target surface after the coating material is applied, the distances from the target surface before construction of which are known and the same, three-dimensionally measures the surface of the coating material and the construction shape including the markers, and calculates the thickness of the coating material over the entire area of the target surface from a virtual plane calculated based on the surface of the coating material and the markers, and has proposed a method for measuring the thickness of the coating material (Patent Documents 1 to 4). In Patent Document 2, several measurement pins suitable for such a measurement method are proposed. Specifically, the measurement pin described in Patent Document 2 is a measurement pin having a support portion extending along a center line and a plate-shaped pressing portion provided orthogonally to the support portion at the head of the support portion, and the pressing portion is used as a marker.

Prior Art Documents

Patent Documents

[0004] Patent Document 1 International Publication No. 2020 / 179336 Patent Document 2 Japanese Unexamined Patent Application Publication No. 2020-143965 Patent Document 3 Japanese Unexamined Patent Application Publication No. 2021-152497 Patent Document 4 Japanese Unexamined Patent Application Publication No. 2021-152309 Patent Document 5 Japanese Unexamined Patent Application Publication No. 5-161424 Patent Document 6 Japanese Unexamined Patent Application Publication No. 5-227841 Patent Document 7 Japanese Unexamined Patent Application Publication No. 6-062664 Summary of the Invention Problems to be Solved by the Invention

[0005] According to the thickness measurement methods described in Patent Documents 1 to 4, the thickness distribution of the applied coating material can be obtained by a single measurement, so the burden on the operator can be significantly reduced. However, the installation of the measurement pins still had to be performed by the operator. In particular, the installation of the measurement pins at high places such as the ceiling and the upper part of the wall, which are out of reach, had to be carried out by climbing on a stepladder or a portable workbench (also called a Rikuma (registered trademark)), which was a dangerous operation with frequent falling accidents.

[0006] The present invention has been made in consideration of the above, and when installing a measurement pin used for measuring the thickness of a coating material on a target surface, even if the place where the measurement pin should be installed is at a high place, without using a stepladder or a portable workbench, an object of the present invention is to provide a jig that enables easy installation of the measurement pin. Means for Solving the Problems

[0007] The jig for installing the measurement pin of the present invention is a jig for installing a measurement pin used for measuring the thickness of a coating material applied to a target surface on the target surface, and has a handle portion and a holding portion provided at the tip of the handle portion and capable of holding the measurement pin by magnetic force.

[0008] In the above jig for installing the measurement pin, preferably, the holding portion includes a flat holding surface, and the measurement pin is adsorbed and held on the holding surface. Thereby, the structure of the jig for installing the measurement pin becomes simple, and the operation of holding the measurement pin by the jig for installing the measurement pin becomes easy.

[0009] When the holding portion of the above jig for installing the measurement pin includes a flat holding surface, more preferably, the holding portion includes a plurality of holding surfaces having different angles with the handle portion. Thereby, it becomes easy to horizontally insert and install the measurement pin, that is, vertically with respect to the wall, to the upper part of the wall or the like.

[0010] In any of the above jigs for installing the measurement pin, preferably, the holding portion is connected to the handle portion by a connecting portion whose connection angle can be adjusted. Alternatively, preferably, the handle portion is composed of a plurality of rod-shaped members connected by a connecting portion whose connection angle can be adjusted. Thereby, it becomes easy to horizontally insert and install the measurement pin to the upper part of the wall or the like.

[0011] Any of the above jigs for installing the measurement pin preferably further has a protractor attached so as to be able to measure the inclination of the handle portion. Thereby, the operator can perform the operation of installing the measurement pin while confirming the accurate angle of the inclination of the handle.

[0012] Any of the above jigs for installing the measurement pin preferably further has an operation portion at the rear portion of the handle portion for operating and releasing the holding of the measurement pin by the holding portion. Thereby, it becomes easy to release the holding after installing the measurement pin on the target surface.

[0013] In any of the above-described jigs for installing measurement pins, preferably, the paddle portion is provided with a telescopic mechanism. As a result, when storing the jig for installing measurement pins, the measurement pins can be installed at a high position while making it shorter.

[0014] The method for installing a measurement pin according to the present invention includes a step of preparing a measurement pin having a plate-shaped pressing portion and a support portion extending perpendicular to the pressing portion on one side of the pressing portion, and a step of magnetically attracting and holding the pressing portion of the measurement pin to a holding portion provided at the tip of the paddle portion of the jig for installing the measurement pin, and a step of gripping the rear portion of the paddle portion of the jig for installing the measurement pin and piercing the support portion of the measurement pin into the coating material applied to the target surface perpendicular to the target surface to install the measurement pin on the target surface.

Advantages of the Invention

[0015] According to the jig for installing a measurement pin of the present invention, when installing a measurement pin used for measuring the thickness of a coating material on a target surface, even if the place where the measurement pin should be installed is at a high place, the measurement pin can be easily installed without using a stepladder or a portable workbench.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0017] First, based on FIGS. 4 and 5, a method for measuring the thickness of a coating material and a measurement pin used for the measurement will be described.

[0018] Referring to FIG. 4, the covering material 51 for measuring the thickness is applied to the target surface 50 by an operator or the like at the site. Examples of the target surface (application surface) include the walls and ceilings of buildings. The type of the covering material is not particularly limited, and examples thereof include heat insulating materials such as on-site foaming type soft or hard urethane foams, for example, the rigid urethane foam defined in JIS A9526. Since the foaming stock solution sprayed on the target surface expands immediately to a foaming ratio of about 20 to 120 times for the urethane foam heat insulating material by spraying construction, it is difficult for even a skilled person to apply it to a uniform thickness (about 10 to 200 mm), and the applied thickness directly affects the heat insulating performance.

[0019] When measuring the thickness of the covering material 51, first, on the target surface 50 after the covering material 51 is applied, three or more markers are installed at the same known distance from the target surface 50 before construction. An example of the measurement pin 60 shown in FIG. 5 has a plate-shaped pressing portion 62 and four needle-shaped support portions 61 that project perpendicularly from the four corners thereof and have the same length. The upper surface of the pressing portion 62 (the surface opposite to the support portion) can be used as the planar marker M, and the height of the measurement pin, that is, the distance from the tip of the support portion 61 to the marker M is p.

[0020] Returning to FIG. 4, when the support portion 61 of the measurement pin 60 is inserted perpendicularly to the target surface 50 into the covering material 51, the distance from the target surface to the marker M is p. The construction shape including the surface of the covering material 51 and the marker M is three-dimensionally measured, and a virtual plane V parallel to the target surface and at a distance p from the target surface is calculated from three or more markers. If the distance between the surface of the covering material and the virtual plane is g, the thickness t of the covering material is t = p - g, and the thickness of the covering material 51 over the entire area of the target surface 50 is obtained. When the target surface 50 is large, a large number of measurement pins 60 are evenly arranged over the entire target surface to calculate a plurality of virtual planes V, and the thickness of the covering material is calculated from the surface of the covering material and the virtual plane calculated based on the measurement pins in the vicinity thereof, thereby reducing the influence of unevenness of the target surface and improving the measurement accuracy. On the other hand, if there are too many, there is a limit to the improvement of the measurement accuracy. In an experiment by the inventors, the measurement pins were about 1 m 2Sufficiently high accuracy was obtained by installing about one per area.

[0021] The first embodiment of the jig for installing the measurement pin of the present invention will be described with reference to FIGS. 1 and 2.

[0022] Referring to FIG. 1, the jig 10 for installing the measurement pin of the present embodiment includes a handle portion 11, a holding portion 20 provided at the tip of the handle portion and capable of holding the measurement pin 60, a protractor 15 provided at the rear portion of the handle portion 11 for measuring the inclination of the handle portion, and a grip 12 provided at the rear end portion of the handle portion 11.

[0023] The handle portion 11 is a long member that extends linearly. The length of the handle portion is preferably 1.5 to 3 m. Considering the floor height of a general detached house or apartment, if the length of the handle is 1.5 m or more, measurement pins can be installed on most walls and ceilings, and it is a waste if the length of the handle is too long. The handle portion 11 is made of, for example, a pipe made of aluminum or synthetic resin. Further, the handle portion 11 may be made telescopic by a known structure. Thereby, when storing or transporting, the jig 10 for installing the measurement pin can be shortened.

[0024] The holding portion 20 is provided at the tip of the handle portion 11 and can hold the measurement pin 60 by magnetic force. The holding portion 20 has a plurality of permanent magnets accommodated in a housing made of a material with a low magnetic permeability such as aluminum or plastic, and the strength of the magnetic adsorption force can be adjusted by turning a dial-type knob 22. Such a member capable of adjusting the magnetic force is well known from those manufactured by Magswitch Technology, Inc. in the United States. In addition, in order for the measurement pin 60 to be attracted and held by the holding portion 20 by magnetic force, the pressing portion 62 is formed of a material with a high magnetic permeability such as iron, or an iron foil or magnetic sheet is attached to the pressing portion.

[0025] The holding part 20 shown in Fig. 1 has a substantially trapezoidal cross-section and is in the shape of a prism with an axis in the direction perpendicular to the paper surface. The side surface of the prism forms a planar holding surface 21, and the pressing part 62 of the measuring pin 60 is adsorbed and held on this holding surface 21. The plurality of holding surfaces 21 each form a different angle with the paddle part 11. This makes it easy to install the measuring pin on various target surfaces 50. For example, if the measuring pin 60 is held on the holding surface 21 perpendicular to the paddle part 11, an operator standing on the floor can install the measuring pin on the ceiling by inserting the paddle part vertically. Also, for example, if the measuring pin 60 is held on the holding surface 21 with an angle of 30 to 60 degrees with the paddle part 11, an operator standing on the floor can horizontally install the measuring pin at a high position on the wall. The plurality of holding surfaces 21 preferably include those with angles of 90 degrees and 30 to 60 degrees with the paddle part 11, and more preferably include those with angles of 90 degrees and 45 degrees.

[0026] The holding part 20 may be connected to the paddle part 11 by a connecting part whose connection angle can be adjusted. Thereby, even when the holding part 20 has a single holding surface 21, by changing the connection angle with the paddle part 11, the angle of the measuring pin 60 held on the holding surface 21 with respect to the paddle part 11 can be adjusted. At this time, if the connecting part can adjust the angle formed by the holding surface 21 and the paddle part 11 to 90 degrees and 45 degrees, both the installation work of the measuring pin 60 on the ceiling and the installation work on a high wall will be facilitated. Also, when the holding part 20 has a plurality of holding surfaces 21, by changing the connection angle with the paddle part 11, the angle of the measuring pin 60 held on the holding surface 21 with respect to the paddle part 11 can be adjusted more finely.

[0027] Alternatively, the paddle part 11 may be constituted by a plurality of rod-shaped members connected by a connecting part whose connecting angle can be adjusted. Thereby, even when the holding part 20 has a single holding surface 21, the connecting angle between the rod-shaped members can be changed to bend the paddle part 11, and the angle formed by the measurement pin 60 held by the holding part 20 and the paddle part 11 can be changed. At this time, if the connecting part can adjust the angle formed by the holding surface 21 and the paddle part 11 to 90 degrees and 45 degrees, both the installation work of the measurement pin 60 on the ceiling and the installation work on a high wall will be facilitated. Further, when the holding part 20 has a plurality of holding surfaces 21, by changing the connecting angle of the paddle part 11, the angle of the measurement pin 60 held on the holding surface 21 with respect to the paddle part 11 can be adjusted more finely.

[0028] The protractor 15 is attached to the paddle part 11 so as to be able to measure the inclination of the paddle part 11. In order to cover the support part 61 of the measurement pin 60 with the covering material 51 and pierce it perpendicularly to the target surface 50 using the measurement pin installation jig 10, it is necessary to move the measurement pin installation jig with the inclination of the paddle part 11 set at the correct angle. However, especially when the support part 61 of the measurement pin and the paddle part 11 are not parallel, it is not easy to correctly align the inclination of the paddle part. By providing the measurement pin installation jig with a protractor, the measurement pin installation work can be performed while confirming the accurate inclination of the paddle part 11.

[0029] The protractor 15 is preferably provided at the rear part of the paddle part 11 so that an operator holding the paddle part 11 can easily check its display part 16, and more preferably provided slidably along the paddle part 11 by a mounting member 17. Further, when the detection part and the display part 16 of the protractor 15 are separable, by fixing the detection part of the protractor 15 to the paddle part and attaching the display part 16 to a flexible arm or the like fixed to the rear part of the paddle part 11, the display part 16 can be rotated to a direction in which the operator can easily check it.

[0030] In FIG. 1A, a grip 12 for an operator to hold is provided at the rear end of the paddle part 11. However, it is not essential to provide the grip 12. Even without a grip, the operator can hold an appropriate position of the paddle part 11. When providing a grip, its shape is not particularly limited. For example, it may be in the shape of a pistol grip protruding laterally from the paddle part.

[0031] Next, a method of using the measuring pin installation jig 10 of the present embodiment will be described.

[0032] First, prepare a measuring pin 60 as shown in FIG. 5. As described above, the pressing part 62 of the measuring pin is formed of a material with a high magnetic permeability such as iron, or an iron foil or a magnetic sheet is attached thereto. Rotate the knob 22 of the holding part 20 to adjust the magnetic force of the holding part to a sufficient magnitude required for attracting and holding the measuring pin, bring the pressing part 62 of the measuring pin into close contact with the holding surface 21, and attract and hold it by the magnetic force. The operator holds the rear part of the paddle part 11, inserts the measuring pin installation jig 10, and while checking the inclination of the paddle part 11 with the angle gauge 15, insert the measuring pin into the covering material 51 at a high place so that the supporting part 61 of the measuring pin is perpendicular to the target surface 50. When pulling the measuring pin installation jig 10 so that the holding surface 21 separates from the pressing part 62, due to the frictional resistance between the covering material 51 and the supporting part 61, the measuring pin 60 remains on the target surface, and the measuring pin installation jig 10 separates from the measuring pin. FIG. 2 shows the state of the measuring pin installation operation. This is a state where the operator horizontally installs the measuring pin 60 on the covering material 51 at a high place on the wall using the measuring pin installation jig 10 of the present embodiment. By holding the measuring pin on the 45-degree holding surface, the work can be carried out in a natural posture without climbing on a stepladder or the like.

[0033] Using a three-dimensional measuring instrument, measure the construction shape including the surface of the covering material 51 and the pressing part 62 of the measuring pin serving as a marker, and measure the thickness of the covering material 51.

[0034] After the measurement is completed, rotate the knob 22 of the holding part 20 to maximize the magnetic force of the holding part 20, attract and hold it on the holding surface 21 at the pressing part 62 of the measuring pin on the target surface 50, and pull the measuring pin installation jig 10 so that the holding part separates vertically from the target surface to pull out the measuring pin 60 from the covering material 51.

[0035] A second embodiment of the jig for installing a measurement pin according to the present invention will be described with reference to FIG. 3. The jig for installing a measurement pin in this embodiment is different from the first embodiment in that the holding of the measurement pin by the holding portion can be actuated and released. In the following, the parts different from the first embodiment will be described, and the description of the parts similar to the first embodiment will be omitted.

[0036] The jig 30 for installing a measurement pin in this embodiment includes a handle portion 11, a holding portion 40 provided at the tip of the handle portion and capable of holding the measurement pin 60, and a protractor 15 for measuring the inclination of the handle portion. At the rear end of the handle portion, there is a grip 32 supported by a support frame 35 and an operation piece (operation portion) 37 for releasing the holding of the measurement pin 60 by the holding portion 40.

[0037] The holding portion 40 has a magnet 42 housed in a housing 46 made of a material with a low magnetic permeability such as aluminum or plastic, and actuates and releases the holding of the measurement pin 60 by changing the distance between the holding surface 41 and the magnet 42. The magnet 42 is, for example, a flat single magnet 43 and an armature plate 44 stacked and adhered together with reference to FIG. 3B.

[0038] In a normal state, the magnet 42 is biased by a coil spring 34 sandwiched between the magnet 42 and a spring receiving portion 33 that projects inside the pipe of the handle portion 11, and is pressed against the holding surface 41. The magnet 42 is connected to the tip of a connecting member 36 inserted through the handle portion 11 via a support plate 45 made of a material with a low magnetic permeability such as aluminum or plastic, and the rear end of the connecting member 36 is connected to the operation piece 37 at the rear end of the handle portion. When an operator hooks a finger on the operation piece 37 and pulls it toward the grip 32 side, the magnet 42 moves away from the holding surface 41, and the holding of the measurement pin 60 by the holding portion 40 is released. When the handle portion 11 is to be made telescopic, the connecting member 36 can also be made telescopic according to the telescoping of the handle portion 11 by the structures described in Patent Documents 5 to 7.

[0039] The shape, structure, and arrangement of the magnet 42 within the housing 46 are not limited to those shown in Fig. 3B. As long as the magnetic field lines from the N pole to the S pole of the magnet 42 pass through the pressing portion when the pressing portion 62 of the measuring pin 60 is brought into close contact with the holding surface 41, a structure in which the pressing portion is attracted to the holding surface 41 is sufficient.

[0040] Alternatively, an electromagnet may be used instead of the permanent magnet for the magnet 42, the holding surface 41 may be joined to the core of the electromagnet, and the switch of the operating portion provided at the rear portion of the lever portion 11 may be operated to turn on and off the power supply to the coil of the electromagnet.

[0041] Also, the position of the operating portion is not limited to the rear end of the lever portion 11, and it may be at a position where an operator can operate while holding the jig 30 for installing the measuring pin. Specifically, it may be at the rear portion of the lever portion 11.

[0042] To install the measuring pin 60 on the target surface 50, the holding portion 40 is set in a state capable of holding the measuring pin and holds the measuring pin. The jig 30 for installing the measuring pin is moved, the measuring pin 60 is stabbed into the coating material 51 while being held by the holding portion 40, the operating piece 37 is operated to release the holding of the measuring pin by the holding portion, and then the jig 30 for installing the measuring pin is recovered. After completion of the three-dimensional measurement of the construction shape, the holding portion 40 is set in a state capable of holding the measuring pin, the measuring pin is adsorbed and pulled out from the coating material 51.

[0043] The present invention is not limited to the above-described embodiments and examples, and various modifications are possible within the scope of the technical idea thereof.

Explanation of Reference Numerals

[0044] 10 Jig for installing measuring pin 11 Lever portion 12 Grip 15 Protractor 16 Display portion 17 Mounting member 20 Holding portion 21 Holding surface 22 Knob 30 Jig for installing measuring pin 32 Grip 33 Spring receiving part 34 Coil spring 35 Support frame 36 Connecting member 37 Operating piece (operating part) 40 Holding part 41 Holding surface 42 Magnet 43 Single magnet 44 Armature plate 45 Support plate 46 Housing 50 Target surface 51 Coating material 60 Measuring pin 61 Support part 62 Pressing part g Distance between the coating material surface and the virtual plane M Marker p Height of the measuring pin t Thickness of the coating material V Virtual plane X Center line of the measuring pin

Claims

1. A jig for installing a measurement pin used to measure the thickness of a coating material applied to a target surface on the target surface, comprising: a handle portion; a holding portion provided at the tip of the handle portion and capable of holding the measurement pin by magnetic force; A jig for installing a measurement pin having the above.

2. The holding portion includes a flat holding surface, and adsorbs and holds the measurement pin on the holding surface. The jig for installing a measurement pin according to Claim 1.

3. The holding portion includes a plurality of holding surfaces having different angles with the handle portion. The jig for installing a measurement pin according to Claim 2.

4. The holding portion is connected to the handle portion by a connecting portion whose connection angle can be adjusted. The jig for installing a measurement pin according to any one of Claims 1 to 3.

5. The handle portion is composed of a plurality of rod-shaped members connected by a connecting portion whose connection angle can be adjusted. The jig for installing a measurement pin according to any one of Claims 1 to 3.

6. Further comprising a protractor mounted so as to be able to measure the inclination of the handle portion. The jig for installing a measurement pin according to any one of Claims 1 to 3.

7. Further comprising an operation portion at the rear of the handle portion for operating and releasing the holding of the measurement pin by the holding portion. The jig for installing a measurement pin according to any one of Claims 1 to 3.

8. The handle portion is provided with a telescopic mechanism. The jig for installing a measurement pin according to any one of Claims 1 to 3.

9. A step of preparing a measurement pin having a plate-shaped pressing portion and a support portion extending perpendicular to the pressing portion on one side of the pressing portion; A step of adsorbing and holding the pressing portion of the measurement pin on a holding portion provided at the tip of the handle portion of the jig for installing a measurement pin by magnetic force; A step of holding the rear portion of the handle portion of the jig for installing a measurement pin and piercing the support portion of the measurement pin perpendicularly to the target surface into a coating material applied to the target surface to install the measurement pin on the target surface. A method for installing a measurement pin having the above steps.

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