Construction method

Abstract

To provide a construction method using a construction tool for fixing a wall material made of non-magnetic material onto a vertically installed steel substrate via an adhesive, capable of improving work efficiency without using step ladders or scaffolding.SOLUTION: The construction method includes: step of temporarily fixing a wall material 6 to a base steel material by overlapping the wall material 6 on the base steel material via an adhesive applied to the surface; a step of magnetically attaching a magnetically attractive surface of the construction tool 1 at an initial position P1, as the height position where a worker can reach the part of the surface of the temporarily fixed wall material 6 where the base steel material exists; and a step of high-rise construction to move the magnetic attractive part up or down while holding the grip end of bar 50 at a high position P3 above the initial position P1 and out of reach of the worker.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a construction method. More specifically, it relates to a construction method using a construction tool that includes a magnetic adsorption part having a magnetic adsorption surface on one side and a handle provided on the non-magnetic adsorption surface side of the magnetic adsorption part, and that fixes a wall material made of a non-magnetic material to a base steel material erected along the vertical direction via an adhesive.

Background Art

[0002] In recent years, in interior construction of buildings, it has been common to screw a base steel plate (soft magnetic material) or wood, for example, a gypsum board (non-magnetic material). In this case, since power is drawn by a cord and construction is performed with an electric drill, it takes time to prepare them, and noise and dust are generated.

[0003] Also, in the case of laminating a gypsum board on a base steel plate using a solid adhesive, there has been a need to perform a pressing operation by applying human weight with a special roller to the solid adhesive portion for a certain period of time. In this case, there are variations in the work of individuals, and there is a lack of reliability.

[0004] As an invention for solving the above problems, the applicant of the present application has developed a construction tool described in Patent Document 1. This construction tool includes a magnetic adsorption part having a magnetic adsorption surface on one side and a handle provided on the non-magnetic adsorption surface side of the magnetic adsorption part. Specifically, it includes a casing incorporating a strong permanent magnet and a handle attached to the upper part of the casing. The handle is made of a soft magnetic material and also functions as a yoke of the permanent magnet in the casing. In this construction tool, when laminating a gypsum board on a base steel plate erected along the vertical direction via a solid adhesive, instead of pressing manually as in the prior art, by arranging the magnetic adsorption surface facing the gypsum board, a magnetic circuit can be formed between the gypsum board and the base steel plate, and a strong pressing force due to magnetic force can be obtained. In the interior construction using the above construction tool, the operation is to move the construction tool vertically in a state where the construction tool is magnetically attached to a non-magnetic material from the top to near the floor surface at several locations of the gypsum board (the locations where the base steel plate exists).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Disclosure of the Invention

Problems to be Solved by the Invention

[0006] By the way, even in ordinary houses, the ceiling height is nearly 3 m. In the interior construction using the above construction tool, in the location near the ceiling, the operation is to work on a stepladder or a scaffold platform. In this case, there is a risk of slipping and falling from the stepladder or the scaffold platform, and it also takes time to climb up and down and move the position each time. In addition, it takes the trouble to carry a stepladder or a scaffold platform to the site, and the work efficiency is not good.

[0007] The present invention has been made paying attention to such circumstances, and includes a magnetic adsorption part having a magnetic adsorption surface on one side and a handle provided on the non-magnetic adsorption surface side of the magnetic adsorption part. In a construction method using a construction tool used when fixing a wall material made of a non-magnetic material to a base steel material erected along the vertical direction via an adhesive, it is an object to provide a construction method that does not require the use of a stepladder or a scaffold platform and can improve work efficiency.

Means for Solving the Problems

[0008] The present invention takes the following means to solve the above problems. The reference numerals in parentheses attached to each constituent means in this column (the column of "Means for Solving the Problems") are for reference to show the correspondence with the specific means described in the embodiments described later, and the constituent means of the present invention are not limited thereto.

[0009] One aspect of the present invention is a construction tool (1) having a magnetic adsorption part (10, 20) with a magnetic adsorption surface (16) on one side, a handle (30) provided on the non-magnetic adsorption surface side of the magnetic adsorption part (10, 20), and a bar (50) with a maximum length of 1 m or more rotatably supported around an axis parallel to the horizontal axis of the magnetic adsorption part (10, 20) during construction and the magnetic adsorption surface (16) on a part of the magnetic adsorption part (10, 20) or the handle (30). When performing construction to fix a wall material (6) made of a non-magnetic material to a base steel material (4) erected vertically along the vertical direction via an adhesive (5), a construction method is provided. The method includes a wall material temporary fixing step of temporarily fixing the wall material (6) to the base steel material (4) by overlapping the wall material (6) on the base steel material (4) with the adhesive (5) interposed on the surface, a construction tool magnetic attachment step of magnetically attaching the magnetic adsorption surface (16) of the construction tool (1) to an initial position (P1) which is a height position within the reach of the operator's hand at a portion where the base steel material (4) exists on the surface of the temporarily fixed wall material (6), and a high-place construction step of moving the magnetic adsorption part (10, 20) upward or downward while holding the gripping end (51) of the bar (50) at a high position (P3) above the initial position (P1) where the operator's hand cannot reach.

[0010] According to this aspect, at a high position (P3) where the operator's hand cannot reach, since the magnetic adsorption part (10, 20) can be moved up and down using the bar (50) of the construction tool (1), there is no need to use a stepladder or a scaffold, and the work efficiency can be improved.

[0011] In another aspect of the present invention, in the high-place construction step, the bar (50) is inclined with respect to the vertical line.

[0012] According to this aspect, the burden on the operator can be reduced by the action of the moment determined by the vertical component of the force F (or -F) applied by the operator to the bar (50) and the product of the horizontal distance (L1) between the gripping end (51) of the bar (50) and the rotation axis (61), which is L×sinθ.

[0013] In another aspect of the present invention, the range of the angle (θ) for tilting the bar (50) with respect to the vertical line is set to 30 to 60 degrees.

[0014] According to this aspect, the effect of the moment can be effectively utilized.

[0015] In another aspect of the present invention, there is a low-position construction step of moving the magnetic adsorption parts (10, 20) upward or downward while holding the handle (30) at the initial position (P1) and at a low position within the reach of the operator's hand below the initial position (P1).

[0016] According to this aspect, a series of construction operations at high and low positions are achieved.

Effects of the Invention

[0017] According to the present invention, in a construction method using a construction tool for fixing a wall material made of a non-magnetic material to a base steel material erected along the vertical direction via an adhesive, with a magnetic adsorption part having a magnetic adsorption surface on one side and a handle provided on the non-magnetic adsorption surface side of the magnetic adsorption part, there is provided a construction method that does not require the use of a step ladder or a scaffold and can improve work efficiency.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0019] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Note that the scales and angles of the members shown in the accompanying drawings do not necessarily match the actual ones, and are adjusted to appropriate sizes for easy illustration.

[0020] FIG. 1 is an external perspective view of the construction tool 1, where (a) shows the whole and (b) shows the main part. FIG. 2 is a front sectional view of the construction tool 1 (sectional view taken along line A - A in FIG. 1(b)), FIG. 3 is a partial plan sectional view of the construction tool 1, and FIG. 4 is a partial side sectional view of the construction tool 1. FIG. 5 is a view showing the shape of the rod fixture 70, where (a) is a front sectional view, (b) is a plan sectional view, (c) is a front sectional view when the grip end 51 is inserted, and (d) is a plan sectional view when the grip end 51 is inserted.

[0021] As shown in FIG. 1, the construction tool 1 has a main body part 2 and a rod part 8. The construction tool 1 is a tool used when constructing (fixing) the gypsum board 6 to the steel frame 4 via the special adhesive 5 as shown in FIG. 6 described later.

[0022] 〔Main Body Part〕 As shown in FIGS. 2, 3, and 4, the main body part 2 includes a casing 10, a pair of permanent magnets 20, 20 disposed inside the casing 10, and a handle 30 provided integrally with the casing 10 at the upper part of the casing 10.

[0023] 〔Casing〕 The casing 10 is a hollow rectangular parallelepiped-shaped box made of a non-magnetic material such as aluminum or synthetic resin. As shown in FIG. 2, it includes a box-shaped casing body 11 with an open top and a lid 12 for closing the opening of the casing body 11. The lid 12 is provided with bolt holes 121 penetrating in the thickness direction on both sides in its longitudinal direction and screw holes 122 at the four corners. The wall thickness of the casing body 11 and the lid 12 is set to a thickness that allows the magnetic flux of the internal permanent magnet 20 to pass through sufficiently, for example, about 1 to 3 mm.

[0024] 〔Permanent Magnet〕 The permanent magnet 20 is made of a block-type neodymium magnet, has an N pole on one surface and an S pole on the opposite surface, and is provided with a bolt hole 21 penetrating in the thickness direction at the center. The permanent magnets 20 are arranged symmetrically with a space between them on both sides in the longitudinal direction within the casing body 11. One permanent magnet 20 is fixedly arranged with the N pole facing the bottom side, and the other permanent magnet 20 is fixedly arranged with the S pole facing the bottom side.

[0025] 〔Handle〕 The handle 30 has two base yokes 31, 31 and a coupling yoke 32. The base yoke 31 is a block-type medium-density body and is provided with a bolt hole 311 penetrating in the thickness direction at the center. The coupling yoke 32 is a rectangular parallelepiped-shaped medium-density body and is provided with bolt holes 321, 321 penetrating in the thickness direction on both sides in the longitudinal direction. Both are made of a magnetic metal, for example, ferrite stainless steel SUS434 or steel. The handle 30 is configured to connect the two base yokes 31, 31 with the coupling yoke 32. Specifically, the coupling yoke 32 is connected in a form that bridges the two base yokes 31, 31 arranged at intervals from each other, and its front view shape is obtained by rotating the shape of the letter "C" 90 degrees counterclockwise.

[0026] For each of the components shown above, on both the left and right sides, after arranging the permanent magnets 20, lid 12, base yoke 31, and coupling yoke 32 in this order from the bottom so that the bolt holes 21, 121, 311, and 321 are coaxial, insert socket head bolts 14 through these bolt holes and fasten them with nuts 15. Then, fix the lid 12 to the screw holes (not shown) of the casing main body 11 with screws 13 inserted into the screw holes 122 of the lid 12 for assembly. The main body 2 assembled in this way has the bottom surface of the casing 10 become a strong magnetic adsorption surface 16 by the permanent magnets 20, 20 inside the casing 10.

[0027] 〔Rod part〕 The rod part 8 is provided symmetrically on the left and right of the main body part 2 and has a telescopic rod 50 and a connecting mechanism 60. Also, as an accessory, it has a rod fixture 70.

[0028] 〔Telescopic rod〕 The telescopic rod 50 is configured by nesting a plurality of hollow round bars with different diameters, and each round bar can be locked at an arbitrary or predetermined length (each maximum length position). The locking mechanism is formed, for example, on a small cylindrical part with the center of the middle part slightly shifted, and a locking tool in which an annular body having a cylindrical hole with the center slightly shifted is rotatably fitted is fixed to the end of a small pipe (the inner round bar), or the lower end region of the inner round bar is tapered downward to a large diameter within a range where it can penetrate the inner peripheral surface other than the upper part of the outer round bar, and the diameter of the inner peripheral surface of the upper part of the outer round bar is made a small diameter that abuts against the tapered surface. Known methods such as these are used. The round bar is made of a non-magnetic metal such as aluminum or synthetic resin, and the maximum length when extended is 1 m or more and 2.5 m or less. This is a length that can reach the ceiling height of a general house when held by an operator. Also, the minimum length when contracted is, for example, 20 cm to 50 cm. By setting the minimum length within this range, it becomes easy to carry and store. One end of the telescopic rod 50 is fixed to the tip region of a connecting arm 63 described below by welding or screwing, etc., and the other end is a non-slip grip end 51 for the operator to hold.

[0029] [Linking mechanism] The linking mechanism 60 is a mechanism for pivotally supporting the telescopic rod 50 around an axis perpendicular to each side surface 31S at the center of both side surfaces 31S of one base yoke 31. Specifically, it has bolts 61, nuts 62, and a connecting arm 63. The connecting arm 63 has a rectangular shape and is made of a non-magnetic metal such as aluminum. One end thereof has a loose hole 631 that is rotatably inserted into the shaft portion of the bolt 61. The other end is fixed to the tip region of the telescopic rod 50 by welding or screwing. The connecting arm 63 is fastened and fixed to the central hole 312 of the side surface 31S of the base yoke 31 with the nut 62 interposed in a state where the bolt 61 is inserted through the loose hole 631. The connecting arm 63 is configured to have a minute gap between the nut 62 and the head of the bolt 61. Such a structure is realized by adjusting the protruding length of the head of the bolt 61 so that the space between the nut 62 and the head of the bolt 61 is slightly larger than the wall thickness of the connecting arm 63 and then fastening and fixing.

[0030] As a result, the two telescopic rods 50 provided symmetrically on the left and right of the base yoke 31 are provided so as to be independently rotatable on a pair of side plates 31S respectively. The reason for making the telescopic rod 50 and the connecting arm 63 non-magnetic is as follows. That is, the magnetic adsorption surface 16 of the construction tool 2 emits a very strong magnetic force, and magnetic lines of force also come out around the casing 10. This is to prevent the telescopic rod 50 and the connecting arm 63 from being accidentally magnetically attached and interfering with the work.

[0031] The rod fixture 70 is composed of a plate-like body having two through holes 71 arranged side by side and capable of fixing the grip ends 51 of the two left and right telescopic rods 50 in an inserted state. The through holes 71 are provided with a clamping member 72 capable of elastically clamping the grip ends 51. The clamping member 72 is made of a material rich in flexibility and elasticity such as foamed urethane, soft rubber, or sponge.

[0032] Next, the usage method of the construction tool 1 will be described. 〔Construction work〕 FIG. 6 is a perspective view for explaining the usage method of the construction tool 1 at the initial position P1 of the gypsum board 6, FIG. 7 is a side sectional view showing the magnetic circuit MF formed between the construction tool 1 and the steel frame 4, and FIG. 8 is a side view for explaining the usage method of the construction tool 1 in chronological order.

[0033] The work described below is specifically the work of attaching the gypsum board 6 as a non-magnetic body to the steel frame 4 as a base steel material using the special adhesive 5. This special adhesive 5 is an adhesive having the property of increasing the adhesive strength in a short time by applying a predetermined pressing force, and here it is of a double-sided adhesive tape type.

[0034] First, as shown in FIG. 6(a), the operator overlaps the gypsum board 6 on the steel frame 4 with the special adhesive 5 attached to its surface. As a result, the gypsum board 6 adheres closely to the special adhesive 5, and as shown in FIG. 6(b), the gypsum board 6 is in a temporarily fixed state to the steel frame 4.

[0035] In this temporarily fixed state, prepare the construction tool 1. At this time, both telescopic rods 50 are set to the shortest or short lengths (see FIG. 8(a)). Next, as shown in FIG. 6(c), bring the magnetic adsorption surface 16 of the construction tool 1 close to the gypsum board 6 and arrange it at the portion of the surface of the gypsum board 6 where the steel frame 4 exists. The height at which it is arranged is within the reach of the operator's hand, and in this description, this position is defined as the initial position P1. At this time, as shown in FIG. 7, one permanent magnet 20, one base yoke 31, coupling yoke 32, the other base yoke 31, the other permanent magnet 20, and the steel frame 4 of the construction tool 1 form a magnetic circuit MF through which magnetic flux with a high magnetic flux density passes. It is a magnetic circuit with the thickness of the gypsum board 6 as an air gap. As a result, the construction tool 1 is magnetically adsorbed to the steel frame 4 with a large force, and it becomes possible to press the gypsum board 6 against the steel frame 4 with a strong pressing force.

[0036] In this state, the operator holds the handle 30 and moves the construction tool 1 downward as indicated by the arrow in Fig. 6(c). As a result, the area where the construction tool 1 presses the gypsum board 6 against the steel frame 4 moves along the steel frame 4 (see the downward arrow in Fig. 8(a)). Consequently, the portion of the gypsum board 6 facing the steel frame 4 via the special adhesive 5 is pressed with an equal and strong pressing force, and by moving it to the lowest position P2, the lower half of the gypsum board 6 is attached to one steel frame 4 by the special adhesive 5.

[0037] After that, the operator holds the handle 30 and moves the construction tool 1 from the lowest position P2 to the initial position P1 (see the upward arrow in Fig. 8(a)). That is, the construction tool 1 is raised so that it follows the above-described downward path as a return path. This ensures the attachment of the lower half of the gypsum board 6 to the steel frame 4.

[0038] With the construction tool 1 placed at the initial position P1, the operator extends and locks the two telescopic rods 50 to their maximum length (see Fig. 8(b)). At this time, for example, while gripping the grip ends 51 of each telescopic rod 50 with both hands and facing the wall surface, i.e., the surface of the gypsum board 6, the operator retreats from the wall surface so that the angle θ formed between the two telescopic rods 50 and the vertical axis is 30 degrees to 70 degrees, preferably 40 degrees to 60 degrees (see the solid line in Fig. 8(c)). This operation is possible because the telescopic rods 50 are pivotally supported on both side surfaces 31S of one base yoke 31 via a connecting mechanism 60 so as to be rotatable about an axis perpendicular to the side surfaces 31S. Next, while advancing toward the wall surface, the operator pushes up the telescopic rods 50 toward the back in their longitudinal direction (see the dashed line in Fig. 8(c)). The vertical component of this pushing force becomes the force to raise the construction tool 1, and the construction tool 1 rises vertically upward from the initial position P1 while pressing the wall surface of the gypsum board 6 by magnetic force. As a result, the upper half of the gypsum board 6 is attached to one steel frame 4 by the special adhesive 5.

[0039] Also, by attaching the rod fixture 70 as shown in Fig. 5 to the gripping end 51 of each telescopic rod 50, the left and right telescopic rods 50 rotate synchronously, making the operation easier. Note that the rod fixture 70 may not be used. In this case, since the two telescopic rods 50 can rotate independently, it is possible to set states with different angles θ on the left and right. Also, the way of applying force to the left and right telescopic rods 50 can be changed. Thereby, delicate trajectory correction on the gypsum board 6 is possible.

[0040] When the construction tool 1 reaches the uppermost position P3, the operator stops the pushing-up operation (see Fig. 8(d)), and then performs the reverse operation. That is, while pulling down the telescopic rod 50 forward in its longitudinal direction, the operator retreats (see the solid line to the dashed line in Fig. 8(e)). The vertical component of this pulling-down force becomes the force to lower the construction tool 1, and the construction tool 1 descends to the initial position P1 vertically downward on the wall surface (see the dashed line in Fig. 8(e)). Through the above operations, the fixing work in the unreachable range is completed, and the construction work for one steel frame 4 is completed.

[0041] After that, the same operation of pressing the gypsum board 6 against the steel frame 4 located next to the steel frame 4 to which the gypsum board 6 is attached is performed. By repeating such operations, the gypsum board 6 is attached to the steel frame 4. As a result, the gypsum board 6 is attached to all the steel frames 4 by the special adhesive 5.

[0042] In this way, with the construction tool 1 equipped with the auxiliary tool 3, the fixing work in the unreachable range can be realized by pushing up and pulling down the extended telescopic rod 50, eliminating the need to use a stepladder or a scaffold, and improving the work efficiency.

[0043] Here, the forces acting during the construction at the upper position of the gypsum board 6 will be described with reference to Fig. 9. Fig. 9 is a side view for explaining the forces acting during the construction at the upper position of the gypsum board 6 by the construction tool 1, where (a) shows the upward pushing of the construction tool 1 and (b) shows the downward pulling of the construction tool 1. Note that the left sides of the following calculation formulas, namely F1, F2, F3, M1, and M2, do not appear in the figure. As shown in Fig. 9(a), when the telescopic rod 50 of the construction tool 1 is inclined at an angle θ with respect to the vertical line and the telescopic rod 50 is pushed upward with a force F in the direction of the telescopic rod 50 while holding the grip end 51, the vertical force component F1 acting on this system is as shown in the following formula (1). F1 = F×cosθ - (W - R) = F×cosθ - (W - μ×Q) ···(1) Here, W is the load of the construction tool 1, μ is the friction coefficient between the magnetic adsorption surface 16 of the construction tool 1 and the gypsum board 6, and Q is the magnetic adsorption force acting between the steel frame 4 and the magnetic adsorption surface 16 of the construction tool 1.

[0044] In formula (1), since the construction tool 1 is strongly magnetically attached to the gypsum board 6, the value of (W - R) is extremely small. Therefore, almost all of F×cosθ, which is the vertical component of the force applied by the operator, is used as the lifting force. Also, the horizontal force component F2 acting on this system is as shown in the following formula (2). F2 = Q + F×sinθ ···(2) That is, during the upward push, a greater pressing force can be obtained compared to the operation with the handle. Also, L×sinθ, which is the horizontal distance L1 between the bolt 61, which is the rotation center of the telescopic rod 50, and the grip end 51 of the telescopic rod 50, becomes the arm length of the vertical force F1, and a moment M1 based on the lever principle acts. The moment M1 is as shown in the following formula (3). M1 = F×cosθ×L×sinθ = F×L×sinθ×cosθ = F×L×sin(2θ) / 2 ···(3) Here, the value of sin(2θ) ranges from 0 to 1 between θ = 0° and 90°, particularly from 0.5 to 1 between θ = 15° and 75°, and from 0.866 to 1 between θ = 30° and 60°. Therefore, in order to effectively utilize the moment effect, it is preferable that θ is about 30° to 60° where a relatively large coefficient value can be obtained.

[0045] Also, as shown in Fig. 9(b), when the telescopic rod 50 of the construction tool 1 is pulled down with a force F in a state where the telescopic rod 50 is inclined at an angle θ with respect to the vertical line, the vertical force component F3 acting on this system is as shown in the following formula (4). F3 = -F×cosθ - (W - R) = -F×cosθ - (W - μ×Q) ··· (4) F3 is the force used for the lowering of the construction tool 1. Also, the horizontal force component F4 acting on this system is as shown in the following formula (5). F4 = Q - F×sinθ ··· (5) That is, during pulling down, only a small pressing force can be obtained compared to the operation with the handle. However, during pushing up, a large pressing force is obtained, so it does not pose a problem.

[0046] Also, L×sinθ which is the horizontal distance L1 between the bolt 61 which is the rotation center of the telescopic rod 50 and the gripping end portion 51 of the telescopic rod 50 becomes the arm length of the vertical force F3, and a moment M2 based on the lever principle acts. The moment M2 is as shown in the following formula (6). M2 = -F×cosθ×L×sinθ = -F×L×sinθ×cosθ = -F×L×sin(2θ) / 2 ··· (6) Here, the value of sin(2θ) ranges from 0 to 1 between θ = 0° and 90°, particularly from 0.278 to 1 between θ = 15° and 75°, and from 0.433 to 1 between θ = 30° and 60°. Therefore, in order to effectively utilize the moment effect, it is preferable that θ is about 30° to 60° where a relatively large coefficient value can be obtained.

[0047] That is, when the worker is performing construction work of attaching the gypsum board 6 to the steel frame 4 at a high position, in the construction tool 1 magnetically held on the gypsum board 6, while applying a force to the gripping end 51 of the telescopic rod 50 inclined at an angle θ from the vertical axis, by moving forward or backward with respect to the gypsum board 6, the construction tool 1 can be moved in the vertical direction. Further, at this time, the burden on the worker can be reduced by the action of the moment determined by the product of the vertical component of the force F (or -F) applied by the worker to the telescopic rod 50 and L×sinθ which is the horizontal distance L1 between the gripping end 51 of the telescopic rod 50 and the rotation axis 61.

[0048] 〔Modification〕 FIG. 10 is an external perspective view showing the construction tool 1A of the modification. In the construction tool 1A, there is only one telescopic rod 50, and it is rotatably attached to the base yoke 31 via the arm frame 63A in the same form as the original form.

[0049] The arm frame 63A has arm side plates 631A arranged opposite to each other and a connecting plate 632 connecting the two arm side plates 631A at their ends, and is a frame body having a substantially U-shaped space S3 inside. The ends of each arm side plate 631A are rotatably supported around an axis perpendicular to the respective side surfaces 31S at the centers of both side surfaces 31S of the base yoke 31. The space S3 is sized such that when the arm frame 63A is rotated, the arm frame 63A does not interfere with the main body portion 2. And one telescopic rod 50 is attached in the direction opposite to the arm side plate 631A at the central position of the connecting plate 632. The construction method using the construction tool 1A is basically the same as the content shown in FIG. 8. In the construction tool 1A, since there is only one telescopic rod 50, the labor of telescoping is reduced and the manufacturing cost is also reduced.

[0050] As described above, the embodiments of the present invention have been described. However, the embodiments disclosed above are merely examples, and the scope of the present invention is not limited to these embodiments. The scope of the present invention is indicated by the description in the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims. That is, the structure, shape, material, number, mounting position, application, and the order of each step during construction of the whole or part of the construction tools 1 and 1A can be appropriately changed in accordance with the gist of the present invention.

[0051] For example, in the above-described embodiment, the telescopic rod 50 is rotatably attached to one base yoke 31 in the main body 2, but it may be attached to the coupling yoke 32 or the casing 10. In the above-described embodiment, an example is shown in which after construction from the initial position P1 to the lowest position P2, construction from the initial position P1 to the highest position P3 is performed. However, after construction from the initial position P1 to the highest position P3, construction from the initial position P1 to the lowest position P2 may be performed.

Industrial Applicability

[0052] In a construction method using a construction tool including a magnetic adsorption part having a magnetic adsorption surface on one side and a handle provided on the non-magnetic adsorption surface side of the magnetic adsorption part, when constructing at a height that is out of reach, there is no need to use a stepladder or a scaffold platform, and it can be widely used as a construction method that can improve work efficiency.

Explanation of Reference Numerals

[0053] 1 Construction tool 4 Steel frame (base steel material) 5 Special adhesive (adhesive) 6 Gypsum board (wall material) 10 Casing (magnetic adsorption part) 16 Magnetic adsorption surface 20 Permanent magnet (magnetic adsorption part) 30 Handle 50 Telescopic rod (rod) 61 Bolt (shaft) P1 Initial position P3 High position

Claims

1. A construction tool having a magnetic adsorption portion having a magnetic adsorption surface on one side, a handle provided on the non-magnetic adsorption surface side of the magnetic adsorption portion, and a bar having a maximum length of 1 m or more pivotally supported around an axis parallel to the horizontal axis of the magnetic adsorption surface and the magnetic adsorption portion during construction or a part of the handle, and a construction method for fixing a wall material made of a non-magnetic material to a base steel material erected along the vertical direction via an adhesive, wherein: A wall material temporary fixing step of temporarily fixing the wall material to the base steel material by overlapping the wall material on the base steel material with an adhesive interposed on the surface; A construction tool magnetizing step of magnetizing the magnetic adsorption surface of the construction tool at an initial position which is a height position reachable by the operator's hand in a portion of the surface of the temporarily fixed wall material where the base steel material exists; A high-place construction step of moving the magnetic adsorption portion upward or downward while holding the gripping end portion of the bar at a high-place position above the initial position where the operator's hand cannot reach; The construction method characterized by comprising the above steps.

2. The construction method according to Claim 1, wherein in the high-place construction step, the bar is inclined with respect to the vertical line.

3. The construction method according to Claim 2, wherein the range of the angle of inclination of the bar with respect to the vertical line is 30 to 60 degrees.

4. The construction method according to Claim 1, further comprising a low-place construction step of moving the magnetic adsorption portion upward or downward while holding the handle at a low-place position reachable by the operator's hand at and below the initial position.

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