Formwork with Sheet

Abstract

To provide a sheeted formwork which makes it easy to attach and detach a crosspiece body to a sheathing board body and has a glossy or smooth resin sheet bonded thereto, allowing easier separation from concrete.SOLUTION: A sheeted formwork 1 includes a wooden formwork body 2 and a resin sheet 3. The formwork body 2 has a sheathing board body 21 and a crosspiece body 22. The resin sheet 3 has a sheathing board sheet 31 and a crosspiece sheet 32. On the surface of the sheathing board body, the sheathing board sheet 31 is bonded via a double-sided tape 4, forming a sheeted sheathing board 11. On the surface of the crosspiece body 22, a crosspiece sheet 32 is bonded via the double-sided tape 4, forming a sheeted crosspiece sheet 12. The sheeted formwork is configured by having the sheeted crosspiece 12 mounted on the sheeted sheathing board 11.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a formwork with a sheet, which includes a formwork body and a resin sheet.

Background Art

[0002] Patent Document 1 discloses a heat-insulating formwork for concrete placement. This heat-insulating formwork is configured by attaching a plastic film or sheet that covers one side thereof to one side of the foamed board forming the formwork body, which is the side facing the concrete placement surface.

[0003] On the surface of the foamed board opposite to the concrete placement side, a plurality of crossbars are provided to reinforce the strength of the foamed board and enable the use of formwork tightening fittings and the like.

[0004] Also, the peripheral edge of the plastic film or sheet is fixed to the upper, lower, left, and right end faces or the back face of the formwork body made of the foamed board by tucker pins, adhesive tapes, or sticky tapes.

[0005] In the heat-insulating formwork disclosed in Patent Document 1, since a plastic film or sheet is attached to the surface on the concrete placement side, the placed concrete does not directly contact the surface of the foamed board, and the concrete is likely to peel off from the heat-insulating formwork.

[0006] Also, when concrete is placed where the heat-insulating formworks are juxtaposed, the concrete is likely to flow into the gap between the adjacent heat-insulating formworks. Even if the concrete flows into this gap, since a plastic film or sheet is attached to a part of the upper, lower, left, and right end faces and the back face of the formwork body, the concrete that has flowed into the gap does not directly contact the surface of the foamed board or the crossbars, and the concrete is likely to peel off from the heat-insulating formwork.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0008] In such a heat-insulating formwork, since formwork clamping fittings are attached to the cross members, the cross members are more severely worn than the formwork body. It is necessary to remove the worn cross members from the formwork body and attach new cross members to the formwork body.

[0009] However, in the above-described heat-insulating formwork, in order to remove the cross members from the formwork body, it was necessary to remove the plastic film or sheet and then remove the cross members from the formwork body. Further, after attaching new cross members to the formwork body, it was necessary to attach a plastic film or sheet to the formwork body and the cross members, and it was difficult to attach and detach the cross members to and from the formwork body.

[0010] The present invention has been invented in view of the above-described conventional problems, and an object thereof is to provide a formwork with a sheet in which a cross member body can be easily attached to and detached from a weir plate body.

Means for Solving the Problems

[0011] In order to solve the above problems, a formwork with a sheet according to one aspect of the present invention includes a wooden formwork body and a resin sheet. The formwork body has a weir plate body and a cross member body. The resin sheet has a weir plate sheet and a cross member sheet. The weir plate sheet is attached to the surface of the weir plate body via a double-sided tape to form a weir plate with a sheet. The cross member sheet is attached to the surface of the cross member body via a double-sided tape to form a cross member with a sheet. The cross member with a sheet is attached to the weir plate with a sheet.

Effects of the Invention

[0012] In the formwork with a sheet according to the present invention, the crossbar body can be easily attached to and detached from the weir plate body, and by attaching a resin sheet having gloss or smoothness, the peelability from concrete is improved.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Mode for Carrying Out the Invention

[0014] The present invention relates to a formwork with a sheet, and more particularly to a formwork with a sheet including a formwork body and a resin sheet. Hereinafter, the formwork with a sheet according to the present invention will be described based on the embodiments shown in the accompanying drawings.

[0015] The formwork with a sheet 1 according to the first embodiment will be described with reference to FIGS. 1A to 8. FIGS. 1A and 1B show the formwork with a sheet 1. The formwork with a sheet 1 includes a wooden formwork body 2 and a resin sheet 3.

[0016] FIG. 2 shows the formwork body 2. The formwork body 2 is a wooden form used when placing concrete. Specifically, the formwork body 2 is preferably made of solid wood, but may be made of a woody material such as a fiberboard such as plywood or MDF (Medium Density Fiberboard).

[0017] The formwork body 2 has a weir plate body 21 and a crosspiece body 22. The weir plate body 21 is a wooden flat plate. The weir plate body 21 has a rectangular shape when viewed from the direction perpendicular to the plate surface (referred to as a front view). One plate surface of the weir plate body 21 becomes the concrete placement surface 210. The concrete placement surface 210 is a plane. The weir plate body 21 has a concrete placement surface 210, a back surface 211, and a side surface 212 where one edge is adjacent to the concrete placement surface 210 and the other edge is adjacent to the back surface 211 and intersects the concrete placement surface 210. The crosspiece body 22 is attached to the back surface 211 on the side opposite to the concrete placement surface 210 of the weir plate body 21. As will be described later, since the resin sheet 3 is attached to the concrete placement surface 210 of the weir plate body 21, the concrete placement surface 210 does not directly contact the concrete, and the concrete contacts the resin sheet 3.

[0018] The crosspiece body 22 is composed of a wooden rod-shaped member. The crosspiece body 22 is attached to the outer peripheral side ends along both the long sides and the short sides of the back surface 211 of the weir plate body 21. The crosspiece body 22 attached along the long side of the back surface 211 of the weir plate body 21 is defined as the crosspiece body 221 on the long side of the back surface 211, and the crosspiece body 22 attached along the short side of the back surface 211 of the weir plate body 21 is defined as the crosspiece body 222 on the short side of the back surface 211.

[0019] The longitudinal length of the crosspiece body 221 on the long side of the back surface 211 is formed to be equal to the length of the long side of the back surface 211 of the weir plate body 21. The longitudinal length of the crosspiece body 222 on the short side of the back surface 211 is formed to be equal to the length obtained by subtracting twice the width of the crosspiece body 221 on the long side of the back surface 211 (the length along the short side of the back surface 211 of the weir plate body 21) from the length of the short side of the back surface 211 of the weir plate body 21.

[0020] The crosspiece body 22 has a rectangular cross-section perpendicular to the longitudinal direction, and one of the four side surfaces, a flat surface, is attached to the back surface 211 of the weir plate body 21. As will be described later, since the resin sheet 3 is attached to the crosspiece body 22, the side surface of the crosspiece body 22 does not contact the back surface 211 of the weir plate body 21, and the resin sheet 3 attached to the crosspiece body 22 contacts the back surface 211.

[0021] It is preferable that the longitudinal length of the crosspiece body 221 on the long side of the back surface 211 is formed to be the same as the length of the long side of the back surface 211 of the weir plate body 21. It is preferable that the longitudinal length of the crosspiece body 222 on the short side of the back surface 211 is formed to be the same as the length of the short side of the back surface 211 of the weir plate body 21.

[0022] The resin sheet 3 is shown in FIGS. 3A to 4. The resin sheet 3 is a resin sheet that covers the surface including the concrete placement surface 210 of the formwork body 2. The resin sheet 3 is composed of, for example, a sheet made of polypropylene. The resin sheet 3 has a weir plate sheet 31 and a crosspiece sheet 32.

[0023] Figure 3A shows the sheet 31 for the weir plate. The sheet 31 for the weir plate includes a placement surface facing portion 311 and a bent portion 312. The placement surface facing portion 311 is a portion that faces the entire surface of the concrete placement surface 210. The placement surface facing portion 311 has a rectangular shape that is the same as the shape and size of the concrete placement surface 210. That is, the placement surface facing portion 311 corresponds exactly to the concrete placement surface 210.

[0024] The bent portion 312 is continuous with the placement surface facing portion 311. A ruled line 310 is formed between the bent portion 312 and the placement surface facing portion 311. The bent portion 312 is bent with respect to the placement surface facing portion 311 along the ruled line 310. The bent portion 312 is a portion that faces the side surface 212 and the back surface 211 of the weir plate body 21. The bent portion 312 has a portion that faces the side surface 212 on the long side of the back surface 211 of the weir plate body 21 (referred to as the bent portion 312 on the long side of the back surface 211) and a portion that faces the side surface 212 on the short side of the back surface 211 of the weir plate body 21. The longitudinal length of the bent portion 3121 on the long side of the back surface 211 is formed to be the same as the longitudinal length of the side surface 212 on the long side of the back surface 211 of the weir plate body 21, and the longitudinal length of the bent portion 3122 on the short side of the back surface 211 is formed to be the same as the longitudinal length of the side surface 212 on the short side of the back surface 211 of the weir plate body 21. Also, the transverse length of the bent portion 3121 on the long side of the back surface 211 and the bent portion 3122 on the short side of the back surface 211 is formed to be longer than the transverse length of the side surface 212 of the weir plate body 21 (that is, the thickness of the weir plate body 21). Intermediate ruled lines 310 are formed at the positions of the transverse length of the side surface 212 of the weir plate body 21 (that is, the thickness of the weir plate body 21) from the boundary with the placement surface facing portion 311 (the ruled line 310 located at the boundary with the placement surface facing portion 311) on the bent portion 3121 on the long side of the back surface 211 and the bent portion 3122 on the short side of the back surface 211. Of the bent portion 3121 on the long side of the back surface 211 and the bent portion 3122 on the short side of the back surface 211, the portions on the placement surface facing portion 311 side of the intermediate ruled line 310 are respectively referred to as the inner bent portions 3121A and 3122A, and the portions on the tip side of the intermediate ruled line 310 are respectively referred to as the outer bent portions 3121B and 3122B.

[0025] Fig. 3B shows a perspective view of the end of the resin sheet 3 enlarged. The resin sheet 3 has a double-sided tape 4 attached to its back surface (the side facing the formwork body 2). The double-sided tape 4 is attached to the entire back surface of the resin sheet 3. The surfaces of the wooden weir plate body 21 and the crossbar body 22 have irregularities. Therefore, when the double-sided tape 4 is attached to the surfaces of the weir plate body 21 and the crossbar body 22, the adhesive of the double-sided tape 4 bites into the concave portions on the surfaces of the weir plate body 21 and the crossbar body 22, and the double-sided tape 4 can be firmly attached to the surfaces of the weir plate body 21 and the crossbar body 22. A protective film 5 is attached to the adhesive surface on the side of the double-sided tape 4 opposite to the side to which the double-sided tape 4 is attached to the resin sheet 3 until immediately before the double-sided tape 4 is attached to the resin sheet 3.

[0026] Fig. 4 shows the crossbar sheet 32. The crossbar sheet 32 includes a long-side opposing portion 321, a short-side opposing portion 322, and an end bending portion 323. The long-side opposing portion 321 is a portion that faces the long-side surface of the back surface 211 of the crossbar body 22, and has a rectangular shape that is the same shape and size as the long-side surface of the back surface 211 of the crossbar body 22. That is, the long-side opposing portion 321 faces the long-side surface of the back surface 211 of the crossbar body 22 without excess or deficiency.

[0027] The short-side opposing portion 322 is continuous with the long-side opposing portion 321. The short-side opposing portion 322 is a portion that faces the short-side surface of the back surface 211 of the crossbar body 22, and has a rectangular shape that is the same shape and size as the short-side surface of the back surface 211 of the crossbar body 22. That is, the short-side opposing portion 322 faces the short-side surface of the back surface 211 of the crossbar body 22 without excess or deficiency.

[0028] The end bending portion 323 is continuous with the short-side opposing portion 322. The end bending portion 323 is a portion that faces the long-side surface of the back surface 211 of the crossbar body 22, but has a shorter length in the short-side direction than the length in the short-side direction of the long-side surface of the back surface 211 of the crossbar body 22. That is, both end bending portions 323 face the long-side surface of the back surface 211 of the crossbar body 22 without excess or deficiency while partially overlapping.

[0029] The above resin sheet 3 is attached to the mold body 2 to form the mold with sheet 1. Specifically, the sheet for weir plate 31 is attached to the weir plate body 21 to form the weir plate with sheet 11 (see FIGS. 7A and 7B). Also, the sheet for cross member 32 is attached to the cross member body 22 to form the cross member with sheet 12 (see FIG. 8). The cross member with sheet 12 is attached to the weir plate with sheet 11 to form the mold with sheet 1. A method for manufacturing the mold with sheet 1 will be described.

[0030] The method for manufacturing the mold with sheet 1 includes (1) a step of preparing the mold body 2, (2) a step of preparing the resin sheet 3, (3) a step of attaching the resin sheet 3 to the mold body 2, and (4) a step of attaching the cross member with sheet 12 to the weir plate with sheet 11.

[0031] (1) Step of preparing the mold body 2 The step of preparing the mold body 2 is a step of preparing the mold body 2, that is, the weir plate body 21 and the cross member body 22. Preparing the weir plate body 21 and the cross member body 22 means manufacturing the weir plate body 21 and the cross member body 22 to prepare them.

[0032] The step of preparing the weir plate body 21 is a step of cutting out and forming the weir plate body 21 from a wooden plate material into a portion having a predetermined shape and a predetermined size.

[0033] The step of preparing the cross member body 22 is configured to form the cross member body 22 by cutting a long bar-shaped member having the same cross-sectional shape as the cross-sectional shape of the cross member body 22 into a predetermined length. Note that the order of the step of preparing the weir plate body 21 and the step of preparing the cross member body 22 is arbitrary, and these steps may be performed simultaneously.

[0034] (2) Step of preparing the resin sheet 3 The step of preparing the resin sheet 3 includes (2.1) a step of attaching the double-sided tape 4 to the resin sheet 3, (2.2) a step of creating a prototype of the resin sheet 3 with the double-sided tape 4, and (2.3) a step of creating grid lines.

[0035] (2.1) Step of attaching double-sided tape 4 to resin sheet 3 Fig. 5 shows a schematic configuration diagram of the manufacturing apparatus 7 for resin sheet 3. The resin sheet 3 is wound around the first roll 71, and the double-sided tape 4 with a protective film 5 attached to one side is wound around the second roll 72. The resin sheet 3 is drawn out from the first roll 71, and the double-sided tape 4 with the protective film 5 attached is drawn out from the second roll 72. The resin sheet 3 is attached to the adhesive surface on the side where the protective film 5 of the double-sided tape 4 is not attached. Thereby, the resin sheet 3 with the double-sided tape 4 is formed and wound around the third roll 73.

[0036] (2.2) Step of creating the prototype of the resin sheet 3 with the double-sided tape 4 The step of creating the prototype is a step of cutting out and extracting portions of a predetermined shape and a predetermined size that will become the sheet 31 for the weir plate and the sheet 32 for the crossbar from the resin sheet 3 with the double-sided tape 4 wound around the third roll 73 to create portions that will become the prototypes of the sheet 31 for the weir plate and the sheet 32 for the crossbar. The step of creating the prototype is performed by Thomson processing using a Thomson blade. There are various known Thomson processing apparatuses for performing Thomson processing, and since these can be used as appropriate, the description is omitted.

[0037] The portion that will become the prototype of the sheet 31 for the weir plate is a portion that includes the portion that will become the surface facing the placement surface 311 and the portion that will become the bent portion 312. Specifically, as shown in Fig. 3A, the portion that will become the prototype of the sheet 31 for the weir plate is formed in a substantially cross shape with the bent portions 312 on each side centered on the surface facing the placement surface 311, and is formed in a rectangular shape with notches formed at the four corners.

[0038] The portion that will become the prototype of the sheet 32 for the crossbar is formed in a rectangular shape having a long-side facing portion 321, short-side facing portions 322 that are continuous with the long sides of the back surfaces 211 on both sides of the long-side facing portion 321, and end bent portions 323 that are continuous with the short-side facing portions 322, as shown in Fig. 4.

[0039] (2.3) Step of creating grid lines As shown in FIG. 3A, the ruled line forming step is a step of forming a ruled line 310 on the weir plate sheet 31 and the cross member sheet 32. In the weir plate sheet 31, the ruled line 310 is formed at the boundary between the placement surface facing portion 311 and the bending portion 312 adjacent to the placement surface facing portion 311, and at a portion corresponding to the side on the back surface 211 side of the side surface 212 (described later). In the cross member sheet 32, as shown in FIG. 4, the ruled line 310 is formed at the boundary between the long side facing portion 321 and the short side facing portion 322 and at the boundary between the short side facing portion 322 and the end bending portion 323.

[0040] The ruled line forming step is performed by Thomson processing using a special Thomson blade. The special Thomson blade has a rounded tip instead of a sharp tip. In such Thomson processing using a special Thomson blade, the portion that becomes the original shape of the resin sheet 3 is not cut, and a thin portion that becomes the ruled line 310 is formed. In the first embodiment, as shown in FIG. 3B, the protective film 5 and the double-sided tape 4 are deformed using a special Thomson blade to form a thin portion that becomes the ruled line 310. If the ruled line 310 is formed on the double-sided tape 4, since the ruled line 310 has a certain width, it is not only easy to bend, but also when the resin sheet 3 is bent, the adhesive of the double-sided tape 4 gathers in the groove of the ruled line 310, so that the resin sheet 3 can be prevented from lifting. In addition, when the resin sheet 3 is attached to the weir plate body 21 or the cross member body 22, the protective film 5 can be peeled off from the double-sided tape 4 all at once, and the working efficiency is good.

[0041] In the weir plate sheet 31, the ruled line 310 makes it easier to bend the bending portion 312 with respect to the placement surface facing portion 311. In the cross member sheet 32, the ruled line 310 makes it easier to bend the short side facing portion 322 with respect to the long side facing portion 321 and also makes it easier to bend the end bending portion 323 with respect to the short side facing portion 322.

[0042] (3) Attachment step of the resin sheet 3 to the mold body 2 The attachment step of the resin sheet 3 to the mold body 2 includes an attachment step of the weir plate sheet 31 to the weir plate body 21 and an attachment step of the cross member sheet 32 to the cross member body 22.

[0043] The step of attaching the sheet 31 for the weir plate to the weir plate body 21 first involves peeling off the protective film 5 attached to the double-sided tape 4. Next, as shown in Fig. 6, after aligning the placement surface facing portion 311 of the sheet 31 for the weir plate with the concrete placement surface 210 of the weir plate body 21, the placement surface facing portion 311 is attached to the concrete placement surface 210 via the double-sided tape 4.

[0044] Next, as shown in Fig. 7A, the bent portion 312 is bent along the ruled line 310 with respect to the placement surface facing portion 311, and the bent portion 312 is attached to the side surface 212 of the weir plate body 21. Then, it is further bent along the ruled line 310 at the side on the back surface 211 side of the side surface 212, and the remaining portion of the bent portion 312 is attached to the back surface 211. At this time, as shown in Fig. 7B, at the corner of the sheet 31 for the weir plate, the adjacent bent portions 312 overlap to form an overlapping portion 313. In the overlapping portion 313, since the resin sheets 3 overlap, it has a thickness equivalent to that of two resin sheets 3.

[0045] The overlapping portions 313 are formed at the four corners of the weir plate body 21, but no overlapping portion is formed between the overlapping portions 313 at both ends of the short side or the long side of the back surface 211, and the thickness of this portion is equivalent to that of one resin sheet 3. Therefore, a resin sheet 3 may be additionally attached between both overlapping portions 313 along the short side or the long side of the back surface 211. The additional resin sheet 3 may be attached to the back surface 211 so as to be located between the bent portion 312 and the back surface 211, or may be attached by overlapping it on the bent portion 312 attached to the back surface 211.

[0046] When the resin sheet 3 is not added, in the state where a plurality of weir plate bodies 21 are stacked, the weir plate bodies 21 are in a double-supported state supported by both overlapping portions 313, and there is a possibility that the portion between the overlapping portions 313 may bend. However, when the resin sheet 3 is added, it becomes difficult for the weir plate body 21 to bend in this way.

[0047] Also, when attaching the crosspiece body 22 to the back surface 211 of the weir plate body 21 via the resin sheet 3, the surface of the resin sheet 3 on the back surface 211 side becomes flat without steps, making it easier to firmly attach the crosspiece body 22. Also, it becomes difficult to form a gap between the crosspiece body 22 and the resin sheet 3 on the back surface 211 side, and it becomes difficult for concrete to flow in through this gap. As a result, it is possible to prevent concrete from flowing in through the gap between the crosspiece body 22 and the resin sheet 3 on the back surface 211 side, contacting the back surface 211 of the weir plate body 21, and corroding the weir plate body 21.

[0048] Since the ruled line 310 is formed at the boundary between the placement surface facing portion 311 and the bent portion 312 of the weir plate sheet 31, the weir plate sheet 31 is likely to bend at a right angle at the boundary between the placement surface facing portion 311 and the bent portion 312. The placement surface facing portion 311 is likely to follow the concrete placement surface 210, and the bent portion 312 is likely to follow the side surface 212. Also, since the ruled line 310 is formed at the portion corresponding to the side on the back surface 211 side of the side surface 212 of the weir plate sheet 31, the weir plate sheet 31 is likely to bend at a right angle along the ruled line 310 at this portion. The bent portion 312 is likely to follow the side surface 212, and the further bent portion is likely to follow the back surface 211. As a result, it becomes easier to suppress the weir plate sheet 31 from floating away from the weir plate body 21 without following the surface of the weir plate body 21.

[0049] The process of attaching the sheet for the crosspiece 32 to the crosspiece body 22 first involves peeling off the protective film 5 attached to the double-sided tape 4. Then, as shown in Fig. 8, after aligning the end bending portion 323 of the sheet for the crosspiece 32 with the side surface on the long side of the back surface 211 of the crosspiece body 22, the end bending portion 323 is attached to the side surface on the long side of the back surface 211 of the crosspiece body 22 via the double-sided tape 4. Next, the short-side opposing portion 322 is bent along the ruled line 310 with respect to the long-side opposing portion 321, and the short-side opposing portion 322 is attached to the side surface on the short side of the back surface 211 of the crosspiece body 22. Next, the long-side opposing portion 321 is further bent along the ruled line 310 with respect to the short-side opposing portion 322, and the long-side opposing portion 321 is attached to the side surface on the long side of the back surface 211 of the crosspiece body 22. After that, similarly, the short-side opposing portion 322 is attached to the side surface on the short side of the back surface 211 of the crosspiece body 22, and the end bending portion 323 is attached to the side surface on the long side of the back surface 211 of the crosspiece body 22. At this time, a part of the first-attached end bending portion 323 and the last-attached end bending portion 323 overlap.

[0050] Since the ruled line 310 is formed at the boundary between the long-side opposing portion 321 and the short-side opposing portion 322 and at the boundary between the short-side opposing portion 322 and the end bending portion 323 on the sheet for the crosspiece 32, the sheet for the crosspiece 32 is likely to bend at a right angle at these boundaries, and the sheet for the crosspiece 32 is likely to follow the side surface of the crosspiece body 22. This makes it easier to prevent the sheet for the crosspiece 32 from floating away from the crosspiece body 22 without following the surface of the crosspiece body 22.

[0051] (4) Process of attaching the crosspiece with sheet 12 to the weir plate with sheet 11 The process of attaching the crosspiece with sheet 12 to the weir plate with sheet 11 is a process of attaching the crosspiece with sheet 12 to a predetermined position on the back surface of the weir plate with sheet 11 (the surface on the side of the back surface 211 of the weir plate body 21). In this regard, nails (not shown) are driven in from the surface on the side of the concrete placement surface 210 of the weir plate with sheet 11, and the crosspiece with sheet 12 is attached to the back surface of the weir plate with sheet 11 to fix the crosspiece with sheet 12 to the weir plate with sheet 11.

[0052] The attachment of the slat 12 with a sheet is carried out as follows: First, the slat 12 with a sheet having the slat body 221 on the long side of the back surface 211 is attached along the long side of the back surface 211 of the weir plate 11 with a sheet. At this time, both end edges in the longitudinal direction of the slat 12 with a sheet having the slat body 221 on the long side of the back surface 211 respectively coincide with both end edges in the longitudinal direction of the weir plate 11 with a sheet.

[0053] Next, the slat 12 with a sheet having the slat body 222 on the short side of the back surface 211 is attached along the short side of the back surface 211 of the weir plate 11 with a sheet. At this time, if the slat 12 with a sheet having the slat body 222 on the short side of the back surface 211 is inserted between the slats 12 with a sheet having the slat body 221 on the long side of the back surface 211, no gap is formed between the slats 12 with a sheet. In particular, in the first embodiment, since there is no slat sheet 32 on the end surface of the slat 12 with a sheet, each slat 12 with a sheet can be accurately attached without a gap and at a predetermined position with respect to the weir plate 11 with a sheet.

[0054] By doing so, the outer peripheral surface of the slat 12 with a sheet is surrounded by four continuous planes, and the outer peripheral surface of the slat 12 with a sheet and the outer peripheral surface of the weir plate 11 with a sheet are flush. Through the above steps, the finished product of the formwork 1 with a sheet shown in Fig. 1A is manufactured.

[0055] In the sheet-attached formwork 1 of the first embodiment, since the bent portion 312 of the weir plate sheet 31 covers the side surface 212 of the weir plate body 21, it is possible to prevent concrete from flowing between the bent portion 312 and the side surface 212 and coming into direct contact with the side surface 212, and to prevent the concrete from being easily peeled off from the side surface 212. Further, since the crosspiece sheet 32 covers the side surface of the crosspiece body 22, it is possible to suppress the situation where concrete flows between the juxtaposed sheet-attached formworks 1 and comes into direct contact with the side surface of the crosspiece body 22, and to prevent the concrete from being easily peeled off from the side surface of the crosspiece body 22. Conventionally, when the concrete adhering to the concrete placing surface 210 and the side surface 212 of the weir plate body 21 and the side surface of the crosspiece body 22 was scraped off with a trowel, in the first embodiment, the concrete adhering to the weir plate sheet 31 and the crosspiece sheet 32 made of resin can be wiped off with a towel or the like, and since the concrete can be easily peeled off from the sheet-attached formwork 1, the chipping work can be efficiently performed and labor can be saved, and the sheet-attached formwork 1 is less likely to be damaged. Further, it is possible to prevent the moisture of the concrete from adhering to the wooden formwork body 2 and causing the wooden formwork body 2 to deteriorate (or corrode), and the formwork body 2 can be used for a long period of time.

[0056] Further, a weir plate sheet 31 is attached to the weir plate body 21 via a double-sided tape 4 to form a weir plate 11 with a sheet, and a crosspiece sheet 32 is attached to the crosspiece body 22 via a double-sided tape 4 to form a crosspiece 12 with a sheet. For this reason, it becomes difficult for the resin sheet 3 to float from the formwork body 2. That is, for example, in the method of partially fixing the resin sheet 3 to the formwork body 2 by a tacker, the portion of the resin sheet 3 that is not fixed to the formwork body 2 is likely to lift off from the formwork body 2. For example, when forming a through-hole for attaching a separator to the weir plate 11 with a sheet, a drill passing through the weir plate body 21 pushes the weir plate sheet 31 in a direction away from the weir plate body 21, making it easier for the weir plate sheet 31 to peel off from the weir plate body 21. On the other hand, by attaching the resin sheet 3 to the formwork body 2 with the double-sided tape 4, the entire surface of the resin sheet 3 (or a portion more than half in terms of area) can be easily fixed to the formwork body 2, and the resin sheet 3 can be made difficult to lift off from the formwork body 2. Further, the adhesive of the double-sided tape 4 does not flow along the surface of the double-sided tape 4 and form lumps, and it is suppressed that the resin sheet 3 is lifted by the lumps of the adhesive.

[0057] When the resin sheet 3 floats from the formwork body 2, particularly when a gap is formed between the side surface 212 of the weir plate body 21 and the bent portion 312, when concrete flows into the space between the juxtaposed formworks 1 with sheets, it will flow into the space between the side surface 212 and the bent portion 312 and is likely to adhere to the wooden side surface 212. However, in the formwork 1 with a sheet of the first embodiment, this can be suppressed. Also, when the formwork 1 with a sheet is repeatedly used, even if through-holes are formed in the formwork 1 with a sheet, since the weir plate sheet 31 is difficult to lift off from the weir plate body 21, it is possible to suppress concrete from flowing into the space between the weir plate body 21 and the lifted weir plate sheet 31 through the through-holes.

[0058] In addition, a sheet-attached formwork 1 is configured by attaching a sheet-attached crosspiece 12, in which a crosspiece sheet 32 is attached to a crosspiece body 22 via a double-sided tape 4, to a sheet-attached weir plate 11, in which a weir plate sheet 31 is attached to a weir plate body 21 via the double-sided tape 4. As a result, even when it becomes necessary to replace the sheet-attached crosspiece 12 during repeated use of the sheet-attached formwork 1, the sheet-attached crosspiece 12 can be easily removed from the sheet-attached weir plate 11 and can be easily attached to the sheet-attached weir plate 11. That is, the resin sheet 3 is separated into the weir plate sheet 31 and the crosspiece sheet 32, the weir plate sheet 31 is attached to the weir plate body 21, and the crosspiece sheet 32 is attached to the crosspiece body 22. For this reason, when the resin sheet 3 is not separated and is attached to the entire formwork body 2, if an attempt is made to remove the crosspiece body 22 from the weir plate body 21, first the resin sheet 3 is peeled off from the formwork body 2, then the crosspiece body 22 is removed from the weir plate body 21, the crosspiece body 22 is replaced and attached to the weir plate body 21 to configure the formwork body 2, and then the resin sheet 3 is attached to the formwork body 2. However, such troublesome procedures are omitted. In addition, by using the resin sheet 3, curing can be performed so that the surface of the concrete becomes flat and beautiful without using a hollow structure made of resin or the like.

[0059] Next, a second embodiment will be described with reference to FIG. 9. Since the second embodiment is mostly the same as the first embodiment, descriptions that overlap with the first embodiment will be omitted, and mainly the parts different from the first embodiment will be described.

[0060] In the first embodiment, the crosspiece sheet 32 was attached to the entire side surface of the crosspiece body 22, but the crosspiece sheet 32 was not attached to the end surface of the crosspiece body 22.

[0061] In contrast, in the second embodiment, an end surface facing portion 324 is continuously formed at the end of the long side side facing portion 321 of the crosspiece sheet 32. The end surface facing portion 324 is bent with respect to the long side side facing portion 321 and is attached to the end surface of the crosspiece body 22.

[0062] This suppresses the exposure of the end face of the pallet body 22.

[0063] Next, a third embodiment will be described with reference to FIG. 10. Since the third embodiment is mostly the same as the first embodiment, descriptions overlapping with the first embodiment will be omitted, and mainly the parts different from the first embodiment will be described.

[0064] In the first embodiment, the double-sided tape 4 is attached to the entire surface of the pallet sheet 32, and the entire surface of the pallet sheet 32 is attached to the entire side surface of the pallet body 22 via the double-sided tape 4.

[0065] In contrast, in the third embodiment, the double-sided tape 4 is attached only to a part of the pallet sheet 32. Specifically, the double-sided tape 4 is attached only to the end of the end bending portion 323 of the pallet sheet 32, and the double-sided tape 4 is not attached to the middle portion of the pallet sheet 32.

[0066] This makes it easy to peel off the pallet sheet 32 from the pallet body 22 when recycling the pallet 12 with the sheet after use.

[0067] Next, a fourth embodiment will be described with reference to FIGS. 11A and 11B. Since the fourth embodiment is mostly the same as the first embodiment, descriptions overlapping with the first embodiment will be omitted, and mainly the parts different from the first embodiment will be described.

[0068] In the first embodiment, in the overlapping portions of the end bending portions 323 of the pallet sheet 32, the ruled lines 310 were not particularly formed.

[0069] In contrast, in the fourth embodiment, two ruled lines 310 considering the thickness of the pallet sheet 32 are formed in the overlapping portions of the end bending portions 323 of the pallet sheet 32. The interval between the two ruled lines 310 is equal to the thickness of the pallet sheet 32.

[0070] As a result, in the overlapping portions of the end bent portions 323 of the sheet 32 for the pallet, it becomes difficult to form a gap.

[0071] Next, a fifth embodiment will be described with reference to FIG. 12. Since the fifth embodiment is mostly the same as the first embodiment, descriptions overlapping with the first embodiment will be omitted, and mainly the differences from the first embodiment will be described.

[0072] In the first embodiment, the sheet 31 for the weir plate was formed in a substantially cross shape. In contrast, in the fifth embodiment, the sheet 31 for the weir plate has bent portions 314 and 315 on each side around the placement surface facing portion 311, which is the same as in the first embodiment. However, a notch 3141 is formed in the bent portion 314, and a protruding piece 3151 is formed in the bent portion 315, which is different.

[0073] The lengths in the short side direction of the bent portions 314 and 315 are formed to be the same as the length in the short side direction of the side surface 212 of the weir plate body 21 (that is, the thickness of the weir plate body 21). Also, the notch 3141 and the protruding piece 3151 have the same shape and are rectangular or square with the same size. Also, a ruled line 310 is formed between the main body portion of the bent portion 315 and the protruding piece 3151.

[0074] In the fifth embodiment, the bent portion 314 is bent along the ruled line 310 with respect to the placement surface facing portion 311, and the bent portion 314 is attached to the side surface 212 of the weir plate body 21, and the attachment of the bent portion 314 is completed. That is, the bent portion 314 is not attached to the back surface 211 of the weir plate body 21. Also, at the end of the side surface 212 to which the bent portion 314 is attached, the bent portion 314 is not attached to the portion corresponding to the notch 3141.

[0075] Bend the bent portion 315 along the ruled line 310 with respect to the surface-facing portion 311 of the placement surface, and attach the bent portion 315 to the side surface 212 of the weir plate body 21. Then, bend the protruding piece 3151 along the ruled line 310, and attach the protruding piece 3151 to the side surface 212 where the bent portion 314 is not attached corresponding to the notch 3141. Thus, the attachment of the bent portion 315 (including the protruding piece 3151) is completed. The bent portion 315 is not attached to the back surface 211 of the weir plate body 21.

[0076] By attaching the protruding piece 3151 to the portion corresponding to the notch 3141, the weir plate sheet 31 is attached to the entire surface of the side surface 212. Also, in the weir plate sheet 31 attached to the side surface 212, no overlapping portion is formed.

[0077] Further, since the main body portion of the bent portion 315 and the protruding piece 3151 attached to the side surface 212 of the weir plate body 21 are continuous, no gap is formed between the main body portion of the bent portion 315 and the protruding piece 3151, and concrete does not flow in from the gap between the main body portion of the bent portion 315 and the protruding piece 3151. Also, the weir plate sheet 31 is difficult to lift off from the weir plate body 21, and it is difficult for concrete to flow in between the weir plate sheet 31 and the weir plate body 21.

[0078] In the fifth embodiment, the weir plate sheet 31 is not attached to the back surface of the configured weir plate 11 with a sheet. Therefore, it is easy to attach the timber with a sheet 12 to the back surface of the weir plate 11 with a sheet. That is, since the timber with a sheet 12 is directly attached to the back surface 211 of the weir plate body 21 constituting the weir plate 11 with a sheet, there is no intervening weir plate sheet 31 in between, and it is easy to firmly fix. For example, it is easy to attach the timber with a sheet 12 to the back surface (the back surface 211 of the weir plate body 21) of the weir plate 11 with a sheet using an adhesive.

[0079] Next, a sixth embodiment will be described with reference to FIGS. 13A and 13B. Since the sixth embodiment is mostly the same as the first embodiment, descriptions overlapping with the first embodiment will be omitted, and mainly the differences from the first embodiment will be described.

[0080] As shown in FIG. 13A, in the sixth embodiment, the sheet-attached weir plate 11 is different from the first embodiment in that a resin-made hollow structure 6 is provided between the concrete placing surface 210 of the weir plate main body 21 and the surface facing portion 311 of the sheet for the weir plate 31.

[0081] As shown in FIG. 13B, the hollow structure 6 has a core layer 61 having a honeycomb structure and skin layers 62 formed on both surfaces of the core layer 61 by welding or the like. As such a hollow structure 6, various known hollow structures can be appropriately used, and detailed description thereof is omitted. By having the hollow structure 6 in the sheet-attached formwork 1, the heat retention property of the sheet-attached formwork 1 when curing the placed concrete can be improved.

[0082] Next, a modified example will be described.

[0083] The weir plate main body 21 and the crosspiece main body 22 may include materials other than wood and woody materials.

[0084] The weir plate main body 21 (concrete placing surface 210) may not be rectangular in a front view, for example, may be square or may have a shape other than a quadrilateral, and the shape is not limited. The concrete placing surface 210 is preferably a flat surface, but does not necessarily have to be a flat surface.

[0085] The crosspiece main body 22 may be attached only to an end portion along the long side or the short side of the back surface 211 of the weir plate main body 21. The cross-sectional shape of the crosspiece main body 22 may not be rectangular, for example, may be square or may have a shape other than a quadrilateral, and the shape is not limited. The length in the longitudinal direction of the crosspiece main body 22 does not have to be formed to be the same as the length of the side of the back surface 211 of the weir plate main body 21.

[0086] The resin sheet 3 may be formed of a transparent resin, or may be formed of a translucent or opaque resin. As the material of the resin sheet 3, for example, in addition to polypropylene, polyethylene, polyethylene terephthalate, vinyl chloride, fluororesin, silicone-added resin, etc. are preferably used, but not limited thereto. The thickness of the resin sheet 3 is not particularly limited, but is preferably 0.1 mm or more and 1.0 mm or less, and more preferably 0.3 mm or more and 0.6 mm or less.

[0087] When storing or transporting the sheet 31 for the weir plate, a plurality of sheets 31 for the weir plate may be stacked, and a string or the like may be hooked on the notches (see Fig. 3A) at the diagonal positions and bundled. Further, a plurality of bundles of the sheets 31 for the weir plate thus bundled may be stacked. Since each sheet 31 for the weir plate is flat, the bundle of the sheets 31 for the weir plate can be laid so that the upper surface is substantially horizontal, and a plurality of bundles can be stacked without being easily collapsed.

[0088] The surface 311 of the sheet 31 for the weir plate facing the placement surface does not have to exactly correspond to the concrete placement surface 210 without excess or deficiency, and there may be an excess or deficiency with respect to the concrete placement surface 210. In a front view, the surface 311 facing the placement surface does not have to be rectangular, and may have, for example, a square shape or a shape other than a quadrilateral. The shape is not limited, but it suffices that the shape and size generally correspond to the concrete placement surface 210.

[0089] In a front view, the bent portion 312 of the sheet 31 for the weir plate does not have to be rectangular, and may have, for example, a square shape or a shape other than a quadrilateral. The shape is not limited.

[0090] The sheet 31 for the weir plate may be attached to the entire back surface 211 of the weir plate body 21.

[0091] In a front view, the sheet 32 for the crossbar does not have to be rectangular, and may have, for example, a square shape or a shape other than a quadrilateral. The shape is not limited.

[0092] The crosspiece sheet 32 may have a long-side opposing portion 321 on either side instead of having end bending portions 323 at both ends. That is, the crosspiece sheet 32 may successively and continuously have a long-side opposing portion 321, a short-side opposing portion 322, a long-side opposing portion 321, and a short-side opposing portion 322 in that order. Also, the crosspiece sheet 32 does not have to be attached to the entire circumference of the crosspiece body 22, and may be attached to the end face of the crosspiece body 22.

[0093] The prototype creation process does not have to be performed by Thomson processing using a Thomson blade. For example, the sheet may be punched by a press die to create a portion that becomes the prototype of the resin sheet 3.

[0094] The portion that becomes the prototype of the weir plate sheet 31 may be formed larger than the weir plate body 21 that is assumed to be used so as to be able to correspond to weir plate bodies 21 of various shapes and sizes.

[0095] The ruled line creation process does not have to be performed by Thomson processing using a Thomson blade, and may be performed by other methods. The cross-sectional shape of the thin portion that becomes the ruled line 310 may be a V shape, a semi-circular shape, etc., and is not particularly limited. Also, the ruled line 310 may of course be formed on the resin sheet 3.

[0096] The protective film 5 may be partially cut and the double-sided tape 4 may be partially incised. Thereby, when the protective film 5 is attached to the weir plate body 21 or the crosspiece body 22, it can be peeled off for each portion to be attached, and the double-sided tape 4 does not adhere to an unintended portion during the attaching operation.

[0097] The double-sided tape 4 does not necessarily need to be attached to the entire surface of the resin sheet 3. In particular, a gripping portion that can be gripped with a finger may be formed at the end of the resin sheet 3 without attaching the double-sided tape 4, and the double-sided tape 4 may be attached to the entire surface of the intermediate portion of the resin sheet 3. Thereby, when peeling the resin sheet 3 from the weir plate body 21 or the crosspiece body 22 for recycling or the like, it is easy to peel the resin sheet 3 by gripping the gripping portion. Also, the double-sided tape 4 and the protective film 5 may be attached to the entire surface of the resin sheet 3, and the protective film 5 at the end of the resin sheet 3 may be left without being peeled off, and the protective film 5 of other portions may be peeled off. Thereby, when peeling the resin sheet 3 from the weir plate body 21 or the crosspiece body 22 for recycling or the like, it is easy to peel the resin sheet 3.

[0098] The attachment of the sheeted crosspiece 12 to the sheeted weir plate 11 is not limited to nailing from the side of the concrete placement surface 210 or using an adhesive. For example, a nail may be driven into the surface on the back surface 211 side of the sheeted weir plate 11 through the sheeted crosspiece 12 to fix the sheeted crosspiece 12 to the sheeted weir plate 11.

[0099] The manufacturing method of the sheeted formwork 1 described above is an example, and the manufacturing method of the sheeted formwork 1 is not limited to the above manufacturing method.

[0100] As is clear from the above-described embodiments and modified examples, the sheeted formwork 1 of the first aspect includes a wooden formwork body 2 and a resin sheet 3. The formwork body 2 has a weir plate body 21 and a crosspiece body 22. The resin sheet 3 has a weir plate sheet 31 and a crosspiece sheet 32. The weir plate sheet 31 is attached to the surface of the weir plate body 21 via a double-sided tape 4 to form a sheeted weir plate 11. The crosspiece sheet 32 is attached to the surface of the crosspiece body 22 via a double-sided tape 4 to form a sheeted crosspiece 12. The sheeted crosspiece 12 is attached to the sheeted weir plate 11.

[0101] According to the first aspect, the resin sheet 3 has a weir plate sheet 31 and a crosspiece sheet 32. Since the weir plate sheet 31 is attached to the weir plate body 21 and the crosspiece sheet 32 is attached to the crosspiece body 22, the crosspiece 12 with sheet can be easily removed from the weir plate 11 with sheet, and the crosspiece 12 with sheet can be easily attached to the weir plate 11 with sheet.

[0102] The second aspect can be realized by combination with the first aspect. In the second aspect, the weir plate body 21 has a surface that becomes the concrete placement surface 210 and a back surface 211 on the side opposite to the concrete placement surface 210. In the weir plate 11 with sheet, the weir plate sheet 31 is attached to the concrete placement surface 210 and the back surface 211. The crosspiece 12 with sheet is attached to the back surface 211 of the weir plate 11 with sheet via the weir plate sheet 31.

[0103] According to the second aspect, even if the concrete flows into the back surface of the weir plate 11 with sheet, it is easy to peel off the concrete adhering to the back surface of the weir plate 11 with sheet.

Explanation of reference numerals

[0104] 1 Formwork with sheet 11 Weir plate with sheet 12 Crosspiece with sheet 2 Formwork body 21 Weir plate body 210 Concrete placement surface 211 Back surface 22 Crosspiece body 3 Resin sheet 31 Weir plate sheet 32 Crosspiece sheet 4 Double-sided tape

Claims

1. A formwork with a sheet, comprising a wooden formwork body and a first resin sheet, The formwork body has a weir plate body and a cross member body, The resin sheet has a weir plate sheet and a cross member sheet, The weir plate body has a surface that becomes the concrete placement surface and a back surface on the side opposite to the concrete placement surface, The weir plate sheet has a placement surface facing portion and a bent portion that is bent with respect to the placement surface facing portion, The weir plate sheet has a plurality of overlapping portions where adjacent bent portions overlap on the back surface at each portion corresponding to a plurality of corners of the formwork with a sheet, A second resin sheet is attached between the plurality of overlapping portions, The weir plate sheet is attached to the surface of the weir plate body via a double-sided tape to form a weir plate with a sheet, The cross member sheet is attached to the surface of the cross member body via a double-sided tape to form a cross member with a sheet, The cross member with a sheet is attached to the weir plate with a sheet to form the formwork with a sheet. Formwork with a sheet.

2. The second resin sheet is attached so as to overlap the bent portion attached to the back surface. The formwork with a sheet according to Claim 1.

3. The second resin sheet is attached to the back surface so as to be positioned between the bent portion and the back surface. The formwork with a sheet according to Claim 1.

4. A formwork with a sheet, comprising a wooden formwork body and a resin sheet, The formwork body has a weir plate body and a cross member body, The resin sheet has a weir plate sheet and a cross member sheet, The weir plate body has a surface that becomes the concrete placement surface and a back surface on the side opposite to the concrete placement surface, The sheet for the weir plate has a surface facing the placement surface and a bent portion that is bent with respect to the surface facing the placement surface. In each of the portions of the sheet for the weir plate corresponding to a plurality of corner portions of the formwork with the sheet, a notch is formed in one of a pair of adjacent bent portions, and when the sheet for the weir plate is attached to the surface of the other weir plate body, a protruding piece having the same shape and the same size as the notch is formed in the portion corresponding to the notch. The sheet for the weir plate is attached to the surface of the weir plate body via a double-sided tape to form a weir plate with a sheet. The sheet for the cross member is attached to the surface of the cross member body via a double-sided tape to form a cross member with a sheet. The cross member with a sheet is attached to the weir plate with a sheet. Formwork with a sheet.

Images