JPH0814158B2 - Abandoned formwork, its assembling method, and formwork panel used for the abandoned formwork - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discarding formwork, a method for assembling the same, and a formwork panel used in the discarding formwork.

[0002]

2. Description of the Related Art Conventionally, a mesh formwork method characterized by using a so-called rib lath as a discard formwork instead of a plywood weirboard in order to save labor in dismantling formwork and improve quality of skeleton concrete. There is a construction method called.
9 to 11 show a construction example in which a concrete foundation is constructed by the mesh formwork method.
In the figure, reference numeral 33 denotes a rib lath, which is a net-like portion 34 formed by drawing a thin sheet metal at regular intervals and stretching it.
And lateral ribs 35 that integrally connect the mesh portions 34.

As shown in FIG. 11, the rib laths 33 are vertically arranged side by side at predetermined positions on the concrete for discarding 36, and the surface is formed by vertical pipes 37 and horizontal pipes 38 arranged in a lattice. It is supported all over. That is, conventionally, the foam tie 40 is attached to the tip of the round separator 39 that penetrates the rib lath 33 from the back surface side, and the rib lath 33 is sandwiched between the washers 41 and 42 provided on the foam tie 40 on the vertical pipe 37 side. , The basic concrete formwork capable of withstanding the pressure of the frame concrete cast between the ribs 33.

After pouring and curing the concrete, the foam tie 40 is removed and the horizontal and vertical pipes 37, 3 are removed.
8 is dismantled, but the rib lath 33 is said to be buried in the concrete as it is, which saves the trouble of dismantling the formwork. In addition, 43 is a reinforcing bar that has been reinforced in advance in the formwork.

[0005]

However, in the above-mentioned prior art, since the mesh-shaped rib lath 33 that cannot stand alone is adopted as a substitute for the weir plate of the form, a large number of vertical ribs are used as described above. It is necessary to reinforce the rib lath 33 with the pipe 37 and the horizontal pipe 38.Even if the rib lath 33 is buried, the work of dismantling the formwork itself can be omitted, but on the contrary, the work of assembling and dismantling these pipes 37, 38 is troublesome. Therefore, there is a problem that the number of construction steps cannot be reduced so much as the whole formwork work.

In view of the above situation, it is an object of the present invention to significantly reduce the work of formwork as compared with the conventional case.

[0007]

In order to achieve the above object,
The present invention has taken the following technical means. That is, according to the first aspect of the invention, the support member 16 having the guide grooves 19 on both sides of the cross section is provided.
Are arranged in parallel with each other with the opening sides of the guide grooves 19 facing each other, and are bulged toward the inner side of the mold to be bent to form a reinforcing rib.
Formwork panel 1 with 3 and 4 extending along both edges in the width direction
The reinforcing ribs 3 and 4 are installed between the support members 16 such that both ends of the reinforcing ribs 3 and 4 are fitted in the guide grooves 19 and slid from one side in the longitudinal direction of the support members 16, and the support members 16 are provided.
Attach each adjacent formwork panel 1 installed between
The feature is that 3 and 4 are fitted and joined to each other in the width direction.

According to the second aspect of the present invention, the discarding mold 14 has the guide grooves 19 on both sides of the cross section, and the support members 16 are arranged in parallel with each other with the opening sides of the guide grooves 19 facing each other.
And a form panel 1 having reinforcing ribs 3 and 4 which are bulged and bent toward the inner space of the form and extended along both side edges in the width direction, and the form panel 1 includes the reinforcing ribs 3 Both end portions of the support members 16, 4 are fitted in the guide groove 19 and slid between the support members 16 so as to slide from one side in the longitudinal direction of the support members 16, and the adjacent support members 16 are installed between the support members 16. The formwork panel 1 is joined so that the reinforcing ribs 3 and 4 are fitted to each other in the width direction.

According to the third aspect of the present invention, a reinforcing member is formed on both side edges in the width direction of the panel body 2 made of a sheet metal used as a weir for the discarding form so as to bulge toward the back side of the panel body 2 and to be bent. A formwork panel in which ribs 3 and 4 extend along both side edges in the same width direction, and a reinforcing rib 3 on one side in the width direction of the formwork panel 1 is arranged adjacent to the formwork panel 1. It is characterized in that it can be externally fitted to and joined to the reinforcing rib 4 on the other side in the width direction of the other formwork panel 1 to be installed.

Further, the invention according to claim 4 is the form panel 1 according to claim 3, wherein the reinforcing rib 3 on one side in the width direction is used.
Is provided with a retaining means 13 that allows the reinforcing ribs 4 on the other side in the width direction of the other formwork panel 1 to fit into the reinforcing ribs 3 but restricts the separation from the reinforcing ribs 3 in the width direction. It is characterized by

[0011]

[Operation] Reinforcing ribs 3 and 4 extending on both side edges in the width direction of the form panel 1 are fitted to each other when the adjacent form panels 1 are joined to each other, and together with the support member 16, the lattice form is formed. A support structure is configured to support the surface pressure from the building concrete 9.
The retaining means 13 allows the reinforcing ribs 3 and 4 to be fitted to each other, but restricts their separation after the fitting.
Simplify the joining of the form panel 1 inside.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a form panel with a lath adopted in this embodiment, which is composed of a panel body 2 made of a thin sheet metal plated with zinc or the like. The panel main body 2 is provided with upper and lower reinforcing ribs 3 and 4 along both side edges thereof in the width direction (vertical direction in FIG. 1A).
Is formed by bending both width ends of the panel body 2 toward the back surface so as to form a substantially U-shaped cross section, and extends in the longitudinal direction of the panel body 2. The cross-sectional shape of the reinforcing ribs 3 and 4 is
The shape is not limited to the U-shape, but may be a semicircular shape or the like.

Reference numeral 5 is an auxiliary rib extending in the width direction of the panel body 2 between the reinforcing ribs 3 and 4, which is formed by bulging the panel body 2 toward the back side in an arcuate cross section. They are provided at regular intervals in the longitudinal direction of the main body 2 (left-right direction in FIG. 1A). Reference numeral 5a is a bottom rib provided on the bottom of the reinforcing ribs 3 and 4 and is formed by bulging the bottom toward the surface side in an arcuate cross section.

Incidentally, 6 is an insertion hole for a fixture such as a bolt 28 or a pin, and 7 is a separation hole, both of which are provided at the bottom of the reinforcing ribs 3, 4. In this embodiment, between the auxiliary ribs 5 of the panel body 2, a large number of substantially semi-elliptical through holes 8 that are long in the longitudinal direction of the panel body 2 are provided, and four through holes 8 are arranged in the same longitudinal direction. And the row of three through holes 8 side by side in the panel body 2
By arranging the holes alternately in the width direction, a total of 25 through holes 8
Are arranged between the reinforcing ribs 5.

The through hole 8 has a size such that the mortar portion of the slab concrete 9 that has not yet hardened and is placed on the back surface side of the panel body 2 leaks out (in this embodiment, 12 mm in length and 10 mm in width).
The cover member 10 is formed by cutting and raising from the peripheral edge thereof. That is, as shown in FIG. 2, the cover member 10 is formed by punching the upper side of the transverse cut provided in the panel body 2 from the front surface side of the panel body 2 with a semi-elliptical male shape. The cover member 10 is formed at the same time as the formation of the through hole 8, and thereby the cover member 10 having the opening 11 only on the lower end side in the vertical direction is formed by bulging from the peripheral edge of the through hole 8 to the back surface side.

Further, the formwork panel 1 according to the present embodiment has the upper reinforcing rib 3 among the upper and lower reinforcing ribs 3 and 4 on both sides in the width direction thereof.
Has a cross-sectional size slightly larger than that of the lower reinforcing rib 4, and the upper reinforcing rib 3 has a retaining wall 12a and an inclined wall 12a formed by folding back the upper wall portion of the upper reinforcing rib 3 toward the back side. Equipped with 13. That is, as shown in FIG. 6, when the lower reinforcing ribs 4 of the other mold panel 1 arranged in parallel adjacent to the upper reinforcing ribs 3 of the mold panel 1 are pressed from the lateral direction, Reinforcing ribs 4 ride on the inclined wall 12a and are fitted and housed in the upper reinforcing ribs 3, so that the upper and lower reinforcing ribs 3 and 4 are superposed on each other so that the mold panel 1 can be easily connected to each other. After this connection, the retaining wall 12
Engages with the corner portion of the lower reinforcing rib 4 and restricts the lower reinforcing rib 4 from separating from the upper reinforcing rib 3 in the width direction.

3 to 7 show the case where the formwork panel having the above-mentioned structure is adopted as a waste formwork for concrete foundation. This discarding formwork 14 is composed of columns (supporting members) 16 that are erected at regular intervals on discarding concrete (foundation) 15.
And the form panel 1 that is laid between the columns 16 with the longitudinal direction being the horizontal direction, and the reinforcing bars 17 are pre-arranged inside.

As shown in FIG. 5, the pillar 16 is composed of a pillar body 18 formed by bending a long steel plate on both sides in the width direction into a substantially U shape, and a bent end of the pillar body 18 outside the width direction. And a pair of guide grooves 19 and 19 formed by bending in a substantially U-shape toward one side. Separation holes 20 are formed at predetermined intervals in the longitudinal direction at the center of the column body 18 in the width direction. Reference numeral 21 is an insertion hole for a fixture such as a bolt 28 or a pin, which is provided on both sides of the column main body 18 in the width direction and a back plate 22 forming the guide groove 19.

Reference numeral 23 is a mounting base for erection of the support column 16, which is formed in an L-shape in a side view from the base plate portion 24 and the side plate portion 25. Bent ribs 26
Are formed, and the board portion 24 is provided with nail holes 27 for concrete nails. Therefore, the pillar 16 is extremely easily erected on the concrete for discarding 15 by fitting the lower end of the pillar body 18 to the side plate portion 25 of the mount 23 fixed at a predetermined position on the concrete for discarding 15 from above. You can do it.

In this embodiment, after the pillars 16 are erected, the formwork panel 1 is slid and installed between the pillars 16 from above. That is, as shown in FIG. 3, each form panel 1 has both upper and lower reinforcing ribs 3 and 4 fitted in the guide grooves 19 of the supporting column 16 while the upper reinforcing rib 3 is positioned above the supporting column 19 from above. It is installed between the columns 16 so as to slide in sequence from above. At this time, as shown in FIG. 6, since the above-mentioned retaining means 13 is provided on the upper reinforcing ribs 3 of the formwork panel 1 which was previously installed on the lower side, the newly installed formwork panel 1 is placed below it. Push it down towards the formwork panel 1 and its lower reinforcement ribs 4
Are fitted in the upper reinforcing ribs 3, whereby the upper and lower formwork panels 1 can be joined with one touch with both reinforcing ribs 3 and 4 in a superposed state.

As shown in FIG. 4, the formwork panel 1 thus arranged between the columns 16 has bolts 28 fastened to the columns 16 at both ends of the reinforcing ribs 3 and 4 so as to face each other.
By connecting 16 spaces with a round seperator 29,
Is completed. The support 16 and the reinforcing ribs 3 and 4 may be fixed with a dish-head-shaped pin.
If necessary in terms of strength, the round separators 29 may be interposed between the central portions of the mold frame panels 1 facing each other in the longitudinal direction.

After that, the skeleton concrete 9 is poured into the discarding form 14, and at this time, the form panel 1 and the support 16
Are said to be buried together, saving the labor of dismantling the formwork. As described above, in the present embodiment, the form panel 1 is slid and installed between the columns 16 sequentially from above, and the column 16 and the columns 16 are orthogonal to each other only by joining the vertically adjacent form panels 1 to each other. Since the grid-shaped formwork support structure composed of the reinforcing ribs 3 and 4 can be configured, there is no need to assemble and disassemble vertical and horizontal pipes outside the formwork as in the conventional case, and the number of construction steps can be significantly reduced.

Next, when each formwork panel 1 is erected between the columns 16, the cover member 10 is arranged toward the side of the skeleton concrete 9, and in this embodiment, the construction is performed in the summer. In the case, as shown in FIG. 7, the form panel 1 is arranged with all the opening side ends of the cover member 10 facing downward, and when the construction is in winter, as shown in FIG. The formwork panel 1 is arranged with all the side edges facing up.

That is, in the summer (FIG. 7), when the end of the cover member 10 on the opening side is directed downward, the opening 11 of the cover member 10 faces upward, so that the water content of the skeleton concrete 9 is increased by the opening 11. Unless it overflows from the outside, it does not flow to the outside, but the heat of hydration 30 of the building concrete 9 passes through the opening 11.
Since it escapes upward through 8 it is possible to prevent shrinkage cracks due to early hardening of only the concrete part near the formwork panel 1.

On the other hand, in the case of winter (FIG. 8), when the opening side end of the cover member 10 is turned up, the cover member 10 becomes a receiving port as seen from the back side, and thus the water of the skeleton concrete 9 is turned. While the Japanese heat 30 can be prevented from escaping to the outside, the moisture 31 in the mold 14 can be guided by the cover member 10 and discharged downward from the opening 11, so that the hardening of concrete in the vicinity of the mold panel 1 can be accelerated. It is possible to prevent frost damage of concrete.

Although the embodiment of the present invention has been described above, the present invention is not limited to this. For example, a supporting member is arranged as a horizontal beam, and the form panel 1 is horizontally arranged between the supporting members. By sliding and erection,
It can also be used as a discard formwork for slab concrete. In this case, in the formwork panel 1, the through hole 8 and the cover member
It is not necessary to provide 10.

[0027]

As described above, according to the present invention,
Simply slide each formwork panel 1 between the support members 16 and join them together, and the support members 16 and the reinforcing ribs 3, 4
Since it is possible to construct a lattice-shaped formwork support structure made of the above and there is no need to dismantle the structure thereafter, it is possible to greatly reduce the number of construction steps of the entire formwork work.

Further, according to the invention described in claim 4, since the joining of the respective mold panel 1 can be simplified by the retaining means 13, it is possible to further reduce the labor for assembling the mold.

[Brief description of drawings]

FIG. 1 (a) is a front view of a formwork panel, and FIG. 1 (b) is (a).
FIG. 9 is a sectional view taken along line AA of FIG.

FIG. 2 is an enlarged perspective view of a through hole and a cover member.

FIG. 3 is a perspective view of a discarding mold.

FIG. 4 is a plan view of the same.

FIG. 5 is an explanatory view of mounting a support column.

6A and 6B are views for explaining the action of the retaining means, in which FIG. 6A shows before the reinforcing ribs are fitted, and FIG.

FIG. 7 is a vertical cross-sectional view of skeleton concrete in summer.

FIG. 8 is a vertical cross-sectional view of skeleton concrete in winter.

FIG. 9A is a front view of a rib lath according to a conventional example,
(B) is the same longitudinal cross-sectional view.

FIG. 10 is a side view showing a rib lath fixing structure.

FIG. 11 is a perspective view of a discarding mold using a rib lath.

[Explanation of symbols]

 1 Formwork panel 2 Panel body 3 Reinforcing rib 4 Reinforcing rib 13 Retaining means 14 Discarding formwork 16 Supporting member (support) 19 Guide groove

Claims (4)

[Claims] 1. A support member (16) having guide grooves (19) on both sides of its cross section is disposed in parallel with each other with the opening sides of the guide grooves (19) facing each other, and expanded toward the inner side of the mold. Forming and bending the reinforcing ribs (3) and (4) along the widthwise side edges of the formwork panel (1), the reinforcing ribs (3) and (4) at both ends of the guide groove ( Each of the adjacent formwork installed between the support members (16) so as to be fitted in the support member (16) and slide from one side in the longitudinal direction of the support member (16). A method for assembling a discarding form, characterized in that the panel (1) is joined by fitting the reinforcing ribs (3) and (4) to each other in the width direction. 2. A support member (16) having guide grooves (19) on both sides of the cross section, and the guide grooves (19) are arranged in parallel with each other with their opening sides facing each other. And a form panel (1) in which reinforcing ribs (3) and (4) that are bulged toward the side and bent are extended along both side edges in the width direction, and the form panel (1) has the reinforcing ribs. (3) Both ends of (4) are fitted into the guide groove (19) and are slidably installed between the support members (16) so as to slide from one side in the longitudinal direction of the support member (16), Support member
Adjacent formwork panels (1) installed between (16) are joined so that the reinforcing ribs (3) and (4) are fitted to each other in the width direction. . 3. Reinforcing ribs (3) bent and formed on both side edges in the width direction of a panel body (2) made of a metal plate used as a weir for a discarding form and bulging toward the back side of the panel body (2). (4) is a formwork panel extending along both side edges in the same width direction, and the reinforcing rib (3) on one side in the width direction of the formwork panel (1) is the formwork panel (1). Other formwork panels juxtaposed adjacent to each other (1)
The form panel used for the discard form according to claim 2, wherein the form rib panel can be externally fitted to and joined to the reinforcing rib (4) on the other side in the width direction. 4. The reinforcing rib (3) on one side in the width direction is a reinforcing rib of the reinforcing rib (4) on the other side in the width direction of another form panel (1).
The form panel according to claim 3, further comprising a retaining means (13) for allowing the fitting to the (3) but for restricting the widthwise separation from the reinforcing rib (3). .