JP3208976U - Masking tool for shape steel painting work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a masking tool for shape steel painting work that can be easily attached and detached and can be used for various types and sizes of shape steel. SOLUTION: A flange end masking tool 1 and a web end masking tool 2 are formed of plate-like cardboard, and can be folded in half so as to cover a part of an H-shaped steel 10. ing. Magnet tapes 1e, 1f, and 2e are attached to the inside of the tip portions. The flange end masking tool 1 is provided with a slit having a width equal to or slightly larger than the thickness of the section steel in a direction perpendicular to the crease at the center of one side of the double fold. The upper surface covering portion 1a and the two lower surface covering portions 1b mask the end portion of the H-shaped steel flange 10a and the web end portion masking tool 2 masks the end portion of the web 10b. [Selection] Figure 1

Description

  The present invention is used to prevent paint from adhering to a predetermined place in painting work of H-shaped steel, I-shaped steel, angle steel, grooved steel, etc. used as structural materials for buildings, structures, etc. The present invention relates to a masking tool for shape steel painting work.

  When the shaped steel is used as a structural material, it is preliminarily coated for protection in a factory. At that time, when the connecting portion of the shaped steel is painted, the joint becomes slippery due to the coating film, and a sufficient frictional force cannot be obtained even by tightening with a bolt, so that the joint strength is weakened.

  For example, as shown in FIGS. 7 and 8, the connection of the H-shaped steel is made by piercing the end of the flange 10 a of the H-shaped steel 10 with a through hole 10 c and forming a through hole 11 a corresponding to the through hole 10 c on the upper surface. The upper surface splice plate 11 is applied, the lower surface splice plate 12 having a through hole 12a corresponding to the through hole 10c is applied to the lower surface, and the through holes 11a, 10c, 12a are tightened with bolts or rivets. Further, a through hole 10d is formed in the end portion of the web 10b of the H-shaped steel 10, and a splice plate 13 having a through hole 13a corresponding to the through hole 10d is applied to both sides of the web 10b, and the through holes 13a, 10d, 13a are applied. Tighten through bolts or rivets.

  Then, the opposite side of the upper surface splice plate 11, the lower surface splice plate 12, and the splice plate 13 is tightened to the other side to be connected through bolts or rivets. In that way, the connection of the H-section steel is made.

  In such a connection portion, if there is a coating film between the flange 10a and the upper surface splice plate 11 or the lower surface splice plate 12, or between the web 10b and the splice plates 13 and 13, the joint surface becomes slippery, and bolts or rivets are used. Even if it is tightened, a sufficient frictional force cannot be obtained, and the strength of the connecting portion becomes weak.

  Therefore, conventionally, the portions of the H-shaped steel that are in contact with the upper surface splice plate 11, the lower surface splice plate 12, the splice plate 13 and the like are masked with a gum tape or the like so that the paint does not adhere to them during the painting operation.

  Further, in masking with a gummed tape or the like, it takes time to apply the tape, or to remove the tape and dispose of it after the painting operation. Therefore, as shown in Patent Document 1, a masking tool formed of plastic or metal, As shown in Patent Document 2, a masking tool is also proposed in which a flange cover portion and a web cover portion of H-shaped steel are integrally formed of cardboard. If such a masking tool is used, it can be attached and detached with one touch, and the masking work efficiency is improved.

Japanese Utility Model Publication No. 2-121162 Registered Utility Model No. 3051646

However, among the conventional masking tools for shape steel coating work, many tools are prepared for each type and size of the shape steel to be used, as shown in Patent Document 1, for molding plastics and metals. There was a problem that it was necessary. Further, even if the H-shaped steel flange cover part and the web cover part are integrally formed of cardboard as shown in Patent Document 2, the shape steel to be used is limited to the H-shaped steel. was there.

  In view of such problems, the present invention is intended to provide a masking tool for shape steel painting work that can be easily attached and detached and can be used for various types and sizes of shape steel. .

  In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is a rectangular plate-like body that can be folded in half so as to cover a part of a shape steel, and a magnet is attached to the inner side of both ends. It is characterized by that.

  Further, the invention according to claim 2 of the present application is characterized in that, in the invention according to claim 1, a magnet tape is attached as the magnet in parallel with the leading edge of the plate-like body.

  Further, the invention according to claim 3 of the present application is the invention according to claim 1 or 2, wherein two folds are provided in parallel at the same width as the thickness of the shape steel in the intermediate bent portion of the plate-like body. It is characterized by that.

  A device according to claim 4 of the present application is characterized in that, in the device according to claim 1, 2, or 3, the plate-like body is formed of cardboard.

  Further, in the device according to claim 5 of the present application, in the device according to claim 1, 2, 3 or 4, a stopper capable of standing up in parallel with the fold of the plate-like body is provided at the intermediate portion of the plate-like body. It is characterized by that.

  Further, the invention according to claim 6 of the present application is the invention according to claim 1, 2, 3, 4 or 5, in the center of one side across the fold, in the direction perpendicular to the fold, A slit having a width equal to or slightly larger than the thickness of the section steel is provided.

  The invention according to claim 7 of the present application is characterized in that, in the invention according to claim 6, the outer edge of the plate-like body is bent inward.

The masking tool for shape steel painting work of the present invention has the following effects.
That is, in the device according to claim 1, it is made of a plate-like body that can be folded in half so as to cover a part of the shape steel, and the magnets are attached to the inner sides of both end portions thereof, so that the masking is used It can be easily attached and removed simply by fixing it with a magnet and fixing with a magnet, and can be used for various types and sizes of steel shapes.

  In the invention according to claim 2, in the masking tool for shape steel painting work according to claim 1, since the magnet tape is attached as the magnet in parallel with the leading edge of the plate-like body, it is simple and inexpensive. Depending on the material, the leading edge can be attached without gaps.

  Further, in the invention according to claim 3, in the masking tool for shape steel painting work according to claim 1 or 2, two folds are equal to the thickness of the shape steel in the intermediate bent portion of the plate-like body. Since it provided in parallel with the width | variety, a bending part can be attached to a structural steel end surface without a clearance gap.

  Further, in the invention according to claim 4, in the masking tool for shape steel painting work according to claim 1, 2, or 3, the plate-like body is formed of cardboard, so that it can be manufactured at low cost and is disposable. You will also be able to.

  Moreover, in the device concerning Claim 5, in the masking tool for shape steel coating work concerning Claim 1, 2, 3 or 4, it can stand in parallel with the crease | fold of a plate-shaped body in the intermediate part of the said plate-shaped body. Since a simple stopper is provided, the masking length can be easily changed.

  According to a sixth aspect of the present invention, in the masking tool for shape steel painting work according to the first, second, third, fourth, or fifth aspect, a right angle with respect to the fold is provided at the center of one side across the fold. Since a slit having a width equal to or slightly larger than the thickness of the section steel is provided in the direction, masking of the flange end of the H-section steel can be easily performed.

  In the invention according to claim 7, in the masking tool for shape steel painting work according to claim 6, when the outer edge of the plate-like body is bent inward, the masking tool is attached to perform the painting work. It is possible to make it difficult for the paint to enter from the side, and to prevent the paint from adhering to the side surface of the H-shaped steel flange.

It is a figure which shows the usage example of the masking tool for shape steel coating work which concerns on one Example of this invention. It is a figure which shows an example of the masking tool for flange end parts of H-section steel. It is a figure which shows another example of use of the masking tool shown in FIG. It is a figure which shows the other example of the masking tool for flange end parts of H-section steel. It is a figure which shows an example of the masking tool for web edge parts of H-section steel. It is a figure which shows another masking example. It is explanatory drawing in the case of connecting the flange end part of H-section steel. It is explanatory drawing in the case of connecting the web edge part of H-section steel.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing a usage example of a masking tool for shape steel painting work according to an embodiment of the present invention. Reference numerals 10, 10a and 10b correspond to those in FIGS. 7 and 8, wherein 1 is a masking tool for a flange end and 2 is a masking tool for a web end.

The flange end masking tool 1 is formed of rectangular cardboard. As shown in FIG. 2 (A), two folds 1d, 1d in the form of narrow grooves are formed in the middle portion so as to be easily folded. It is provided parallel to the same width W ₁ and the thickness of the flange 10a of the H-shaped steel 10. A slit 1c having a width D equal to or slightly larger than the thickness of the web 10b of the H-section steel 10 is provided in the center of one side across the folds 1d and 1d in a direction perpendicular to the folds 1d and 1d. ing. As a result, two sides of the creases 1d and 1d are sandwiched between two lower surface covering portions 1b and 1b, and the other side is an upper surface covering portion 1a made of a single plate.

Magnet tapes 1e, 1f, and 1f are attached in parallel to the folds 1d and 1d on the inner sides of the top end portions of the upper surface covering portion 1a and the lower surface covering portions 1b and 1b. With these magnetic tapes 1e, 1f, and 1f, when the flange end masking tool 1 is attached to the H-shaped steel 10, it can be firmly fixed to the steel H-shaped steel 10. Further, when removing the flange end masking tool 1 from the H-section steel 10 after the painting operation, it can be easily removed.

  Furthermore, in the middle portion of the upper surface covering portion 1a, a notch 1g is made in a U-shape so that the stopper piece 1h can be bent inward, as shown in FIG. The stopper piece 1h is pushed down with a finger so that it can be used as a stopper.

  Here, a case where a stopper is required will be described. The upper surface splice plate 11 shown in FIG. 7 has six through holes 11a for inserting bolts on the connecting side and the connecting side, but when the load applied to the connecting portion is small, The upper surface splice plate 11 provided with four through holes 11a is used. Then, the upper surface splice plate 11 is shortened by the number of the through holes 11a.

  When the upper splice plate 11 having such a short length is used, the masking length is naturally shortened. In such a case, as shown in FIG. 2 (B), the stopper piece 1h of the flange end masking tool 1 is bent inward to form a stopper, and is attached to the H-section steel 10 as shown in FIG. . When such a flange end masking tool 1 is attached to the end of the flange 10a of the H-shaped steel 10, the stopper piece 1h comes into contact with the end face of the flange 10a, and the flange end masking tool 1 is further in the H shape. The length that is masked by being covered with the masking tool 1 for the flange end is shortened because the steel 10 cannot be moved forward.

  The lateral width of the flange end masking tool 1 is projected to a certain length, for example, about 10 mm, from the side edge of the flange 10a. By doing so, when the flange end masking tool 1 is mounted and painted, it becomes difficult for the paint to enter from the opened side of the flange end masking tool 1, and the paint adheres to the side surface of the flange 10a. Can be suppressed.

  Further, as shown in a cross-sectional view in FIG. 4, the edge portions of the upper surface covering portion 1 a and the lower surface covering portion 1 b that protrude from the side edge of the flange 10 a may be bent inward to form a bent edge 1 i. By doing so, the opening on the side of the flange end masking tool 1 becomes narrower, and it becomes more difficult for the paint to enter, and adhesion of the paint to the side surface of the flange 10a can be suppressed.

  By the way, the H-shaped steel has various sizes such as height 194 mm × width 150 mm, height 198 mm × width 99 mm, height 200 mm × width 100 mm, height 244 mm × width 175 mm, height 346 mm × width 174 mm. is there. Therefore, if the width of the flange end masking tool 1 is adjusted to the maximum width of the H-shaped steel, the flange end masking tool 1 can be used to mask all H-shaped steels having a smaller width. Can also be used, and one flange end masking tool 1 can be used in combination with a plurality of H-shaped steels.

  Next, the web edge masking tool 2 will be described. FIG. 5 is a view showing an example of an H-shaped steel web edge masking tool. In FIG. 5, 2a and 2b are side surface covering portions 2a, 2b and 2c are folds, 2d and 2e are magnetic tapes, 2f is cut and 2g is a stopper piece.

Like the flange end masking tool 1, the web end masking tool 2 is formed of cardboard, and, as shown in FIG. folds 2c, and 2c, are provided in parallel with the same width W ₂ as the thickness of the web 10b of the H-beams 10. And the side surface covering parts 2a and 2b are provided on both sides of the creases 2c and 2c.

Magnet tapes 2d and 2e are attached to the inner sides of the end portions of the side surface covering portions 2a and 2b in parallel with the folds 2c and 2c and the end edges of the side surface covering portions 2a and 2b. With these magnetic tapes 2d and 2e, when the web end masking tool 2 is attached to the H-section steel 10, it can be firmly fixed. Moreover, when removing the masking tool 2 for web edge parts from the H-section steel 10 after a painting operation, it can remove easily.

  Furthermore, in the middle part of one side surface covering part 2a, cuts 2f and 2f are made in a U-shape so that the stopper pieces 2g and 2g can be bent inward, and if necessary, the stopper pieces 2g and 2g, 2g is pushed in with a finger so that it can be used as a stopper.

  Here, the stopper pieces 2g, 2g may or may not be used depending on the length of the splice plate 13 (see FIG. 8) to be applied, like the stopper piece 1g of the flange end masking tool 1. For example, when using the splice plate 13 having a short length as shown in FIG. 8, the stopper pieces 2 g and 2 g are pushed up with a finger to stand up and attached to the H-section steel 10. When such a web end masking tool 2 is attached to the end of the web 10b of the H-section steel 10, the stopper pieces 2g, 2g abut against the end surface of the web 10b, and the web end masking tool 2 is further removed. It becomes impossible to advance to the H-shaped steel 10 side, and the length that is covered and masked by the masking tool 2 for the web end is shortened.

  On the other hand, when the splice plate 13 having a large load applied to the connecting portion and a large number of the through holes 13a and a long length is used, the stopper pieces 2g and 2g are retracted and the web end masking tool 2 is attached. By doing so, the length to be masked becomes longer.

  The web end masking tool 2 having the same shape covering portions as the side surface covering portions 2a and 2b with the folds sandwiched therebetween, and having a magnetic tape provided inside the tip end portion thereof is an H-shaped steel. In addition to the end portion of the web 10b, other portions of the H-shaped steel, for example, the intermediate portion of the flange 10a or other shaped steel can be used for masking.

  When applied to a section steel other than the H-section steel, for example, an angle steel 3 as shown in FIG. 6 (A), a double-folded masking tool of a size suitable for the angle steel 3 is shown in the figure as a fastening bolt, etc. Masking can be performed simply by attaching the hatched connecting portion around the through-hole 3a for passing through.

  Further, as shown in FIG. 6B, the display symbol 10e written on the intermediate portion of the flange 10a of the H-section steel 10 will not be understood if the paint is applied. Therefore, a half-fold masking tool that is large enough to cover the entire display symbol 10e is mounted so as to sandwich the masked portion with hatching in the figure. Thereby, the entire display symbol 10e can be masked.

  Further, when the gusset plate 4 is attached to the side surface of the H-shaped steel 10 and another shape steel or the like is connected to the gusset plate 10, a half-fold masking tool of a size suitable for the connection portion of the gusset plate 4 is tightened in the figure. Masking can be performed simply by attaching the hatched connecting portion around the through-hole 4a for passing a bolt for use.

  In addition, such a half-fold type masking tool has a plate-shaped masking part and can be sandwiched between masking tools. It can also be used for masking other shaped steels. Furthermore, it can also be used when masking the connection part of a steel brace in a building seismic reinforcement.

  In the above embodiment, the case where the flange end masking tool 1 and the web end masking tool 2 are formed of cardboard has been described. However, the present invention is not limited to this. Other materials can be used if present.

DESCRIPTION OF SYMBOLS 1 Masking tool for flange edge 2 Masking tool for web edge 1a Top surface covering part 1b Bottom surface covering part 1c Slit 1d, 2c Fold 1e, 1f, 2d, 2e Magnet tape 1g, 2f Cut 1h, 2g Stopper piece 1i Bending edge 2a, 2b Side surface covering portion 3 Angle steel 3a Through hole 10 H-shaped steel 10a Flange 10b Web 10c, 10d, 11a, 12a, 13a Through hole 11 Upper surface splice plate 12 Lower surface splice plate 13 Splice plate

In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is a rectangular plate-like body that can be folded in two according to the fold so as to cover a part of the shape steel, and is formed inside both ends. A magnet is attached.

Also, it devised according to claim 3 of the present application, the invention according to claim 1 or 2, as the folds, the two folds, characterized in that arranged in parallel with the same width as the thickness of the shaped steel.

Also, devised according to claim 5 of the present application is characterized in devise according to claim 1, 2, 3 or 4, the middle portion of the plate-like body, in that a said parallel can rise stopper and folds And

In the invention according to claim 3, in claim 1 or 2 in such a shape steel paint job masking tools, as the folds, the two folds, so provided in parallel with the same width as the thickness of the shaped steel In addition, the bent portion can be attached to the end face of the shaped steel without a gap.

Moreover, in the device concerning Claim 5, in the masking tool for shape steel painting work concerning Claim 1, 2, 3 or 4, the stopper which can stand in parallel with the said crease | fold is provided in the intermediate part of the said plate-shaped object. Since it is provided, the masking length can be easily changed.

Claims (7)

  A masking tool for painting a shape steel, which is a rectangular plate-like body that can be folded in half so as to cover a part of a shape steel, and has magnets attached to the inside of both ends.   2. The masking tool for shape steel painting work according to claim 1, wherein a magnet tape is attached as the magnet in parallel with the leading edge of the plate-like body.   3. The masking tool for shape steel painting work according to claim 1, wherein two creases are provided in parallel at the same width as the thickness of the shape steel in the intermediate bent portion of the plate-like body.   The said plate-shaped object was formed with the cardboard, The masking tool for shape steel coating work of Claim 1, 2 or 3 characterized by the above-mentioned.   The masking tool for shape steel painting work according to claim 1, 2, 3, or 4, wherein a stopper capable of standing up in parallel with a fold of the plate-like body is provided at an intermediate portion of the plate-like body.   A slit having a width equal to or slightly larger than the thickness of the section steel is provided in the center of one side across the fold line in a direction perpendicular to the fold line. A masking tool for shape steel painting work according to 3, 4 or 5.   The masking tool for shape steel painting work according to claim 6, wherein an outer edge of the plate-like body is bent inward.

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