JP3283730B2 - Formwork panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal formwork panel, and more particularly to a disposable formwork panel.

[0002]

2. Description of the Related Art In foundation works, wall works, and the like, metal formwork panels have been used as dams for formwork forming an elevation of skeleton concrete. This metal formwork panel has a keystone plate or rib lath formed by bending a thin metal plate into an angular waveform. After the hardening of the slab concrete, it is left in a buried state without being dismantled or removed (so-called discarded panel). It is.

[0003] When forming an outer corner or an inner corner formed by the intersection of the vertical surfaces of adjacent skeleton concrete, it is conceivable to bend the formwork panel. Since it is not possible, a form panel exclusively for corners having an L-shaped cross section is prepared.

[0004]

[0005] However, the corner-dedicated formwork panel is bulky, and has problems in management, transportation, and handling of the product. Since the bending angle and the like are different, there is a problem that various kinds of panels must be prepared.

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and has as its object to eliminate the need for a dedicated formwork panel for a corner, and to provide an arbitrary formwork corner at each construction site. An object of the present invention is to provide a metal formwork panel with good workability, which can be easily and accurately bent at an angle and a dimension of the above.

[0006]

According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, the present invention relates to a metal formwork panel used as a weir plate of a formwork constituting an upright surface of skeleton concrete, wherein a rib portion extending in the longitudinal direction on the back or front side of the panel has a predetermined widthwise direction. Are provided in parallel at an interval of, and are located substantially at the center between the rib portions, and are parallel to the rib portions and extend in the longitudinal direction.
A large number of bending slits having no cut-and-raised pieces protruding from each other are provided on a straight line at predetermined intervals (claim 1).

When forming a corner portion of a formwork in the field work, first, the first or a plurality of slit rows from the width direction edge of the formwork panel are determined as the formwork corner portion in accordance with the site. Then, when the formwork panel is bent so as to coincide with the corner angle of the site around the slit row, each joint portion of the slit in a straight line is bent, a fold parallel to the rib portion is formed, and the corner portion is formed. Can be obtained easily and accurately.

[0008] Further, according to the condition of the formwork construction site, the formwork panel may be formed by bending a portion of the slit row located at the center in the width direction at a required arbitrary angle to form a formwork corner panel. it can. In the present invention, small ribs are provided on both sides of the slit of the form panel in parallel with the rib portion, and the required strength of the slit row and the form panel in the vicinity thereof is ensured. In addition, when bending around the slit row and forming the corner of the formwork, a bending force acts on the joint portion of the slit on the straight line, and the bending is reliably bent on the straight line of the slit row,
Since the bent portion does not bend, a corner portion having high accuracy and sufficient strength can be obtained (claim 2).

Further, according to the present invention, a plurality of drain holes are provided in the small ribs of the form panel at predetermined intervals in the longitudinal direction, so that the required strength of the form panel is not reduced. Excess water of concrete poured into the formwork, that is, between the formwork panels, is discharged from the drain hole to the outside facing the panel, thereby preventing a decrease in surface strength of the concrete structure. Also, when the formwork panel is bent around the slit row to form a formwork corner, since the drainage hole is located near the formwork corner, the excess water of the poured concrete does not accumulate in the corner. The concrete structure is discharged, and a decrease in strength at the corner portion surface side of the concrete structure is prevented (claim 3).

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 show an embodiment of the formwork panel 1 according to the present invention, in which a thin metal plate (for example, having a thickness of 0.35 mm) is formed into a rectangle (600 mm × 18 mm) by sheet metal processing.
00 mm) and plated with zinc or the like.

The form panel 1 has both ends 2 in the width direction.
Is bent to the back side 1A (the side on which the concrete is cast on the inner side facing the formwork) in a goby fold, thereby enhancing the panel strength and safety. In the panel 1, ribs 3 extending in the longitudinal direction of the panel are provided on the back surface side 1A in parallel at predetermined intervals in the width direction, and are provided between adjacent ribs 3 in the width direction. A cut which is located at the center and is parallel to the rib portion 3 and extends in the longitudinal direction and projects in the front and back directions.
Many slits 4 penetrating the front and back without raising pieces
(For example, about 15 mm in length)
m) on a straight line (in a dotted line).

On the back side 1A of the form panel 1, small ribs 5 for reinforcement are located on both sides of the four rows of slits.
Are provided in parallel with and continuous with the four rows of slits and the rib portion 3. The rib 3 has a C-shaped slit 6 (having a diameter of about 9.5 mm) except for one end 3A in the width direction.
A part of the circle 8 (peripherally penetrating the front and back except for a circumference of about 1 mm) (also referred to as a half hole) is formed at a predetermined interval (for example, 5 mm).
(0 mm), and a substantially circular lid 7 in the slit 6 can be bent toward the front or back surface of the panel or the remaining connection portion 8 can be cut to form a mounting hole for the separator 9 ( 1 and FIGS. 6 to 8).

Further, a separator mounting hole 10 is provided at a predetermined interval (50 mm) at a position symmetrical to the C-shaped slit 6 provided at the width direction other end rib portion 3B in the width direction one end rib portion 3A of the rib portion 3. (See FIG. 3). A plurality of joining button holes 11 are provided in the one-end rib portion 3A at a predetermined interval (for example, 200 mm) in the longitudinal direction (see FIGS. 1, 10 to 12).

The other end rib portion 3B has the button hole 1
At a position symmetrical to 1, a plurality of bottomed cylindrical joining buttons 12 are provided at a predetermined interval (200 mm) on the panel surface side (groove side forming the rib portion 11) in a punched manner.
Is provided with a rod-shaped expanding tool 13 (see FIG. 12) insertion hole 14 at the bottom. The button 12 fits into the button hole 11 (see FIGS. 11 and 12).

The small ribs 5 are provided with a large number of drain holes 15 at predetermined intervals (for example, 50 mm) in the longitudinal direction and at the center of the C-shaped slit 6.
FIG. 9 shows a case in which the form panel 20 of the above embodiment is used.
The panel support member 22 (see FIG. 13) having a substantially groove-shaped cross-section is formed on the already cast base surface 21.
) Are arranged in parallel, and a fixing nail 24 is
Is positioned and fixed, and the braided reinforcing bar 31 is disposed between the panel support members 22. Then, the longitudinal end (lower end) of the form panel 1 is placed on the member 22 and disposed opposite to each other.

Then, the cover piece 7 at the portion where the separator 9 is to be attached is pushed and bent, and the threaded portion 9A of the separator 9 is inserted. As shown in FIG. The frame panels 1, 1 are connected at predetermined intervals. At this time, the tie 25 is engaged with the form tie 25 in advance, and after the form panel 1 is connected and fixed with the form tie 25, a form support made of a square pipe is formed outside the form panel 1. The member 27 is vertically arranged horizontally, and is held and held by the metal fitting 26.

Therefore, the wedge hole 28 of the foam tie 25
Then, a wedge 29 is driven into the form panel 26 from the outside of the tying fitting 26 to fix the form supporting member 27 to the form panel 1 via the separator 9, the foam tie 25, the fitting 26 and the wedge 29. As shown in FIG. 13, the panel supporting member 22 has one side 22A higher than the other side 22B, and a part of the side 22A at a predetermined interval in the length direction. A horizontal fixing piece 23 is provided by being cut down to the outside, and a nail hole 30 is provided in the fixing piece 23 so that the fixing nail 24 which is a concrete nail can be hammered with a hand hammer.

When connecting the form panel 1 in the width direction, as shown in FIG. 10, the button panel 11 of the one end side rib 3A and the other end side rib 3B of the adjacent form panel 1 are connected. After the joining buttons 12 provided are matched with each other, as shown in FIG. 11, the joining buttons 12 are pushed into the button holes 11 to be in a fitted state, and the rib portions 3A and 3B are overlapped.
A bar-shaped expanding tool 13 is driven into the hole 14 of the button 12 to expand the button 12 as shown in FIG.
It is swaged and fixed to the periphery of the button hole 11.

Then, if necessary, the lid 7 of the overlapped rib portion 3B is pressed and bent to form a hole that penetrates the separator mounting hole 10 of the other rib portion 3A that matches with this, and then, Form panels 1, 1 opposed by a separator 9
Can be linked. Therefore, when forming the formwork corner portion in the on-site work, as shown in FIGS. 15 and 16, the formwork panel 1 is placed on the back side or the front side with a required angle centered on four rows of slits (in this example, 90 degrees). In this case, the dimension from the connection position in the panel width direction to the corner is determined according to the situation at the site, and the number of the four rows of slits from the edge of the form panel 1 is determined as the form corner, The form panel 1 is bent around the four rows of the slits so as to match the corner angle of the site.

When the form panel 1 is bent, the joints a (see FIGS. 5 and 7) of the slits 4 which are aligned in a straight line parallel to the ribs 3 and the small ribs 5 are bent.
And a fold parallel to the small rib 5 is formed.
Can be obtained easily and accurately. At this time, slit 4
The row is located at the center of the small rib 5 as the reinforcing portion, and the bending force acts intensively on each joint portion a of the slit 4, so that the fold does not bend and the fold is formed on a straight line of the four rows of the slit. Is formed.

As shown in FIG. 17, the form panel 1 of the above embodiment can be bent in a substantially arc shape to form a curved surface form, and its curvature is centered on four rows of each slit. Can be arbitrarily selected depending on the bending angle. According to the above-described embodiment, since the interval between the grooves of the ribs 3 is made narrow (16 mm) and the small ribs 5 are provided, the thickness of the panel plate can be reduced, and the strength can be increased to reduce the weight, and the cost can be reduced. Can be lowered. In addition, since both end edges 2 in the width direction of the form panel 1 are bent in a goby shape, the edge strength can be increased, and the workability and safety can be enhanced.

Further, both end rib portions 3 in the width direction of the form panel 1 are formed.
A and 3B are provided with the button holes 11 and the joining buttons 12, so that the connection between adjacent panels can be easily and securely connected, and the separator mounting hole 10 and the C-shaped slit 6 lid piece. The facing panels 1 and 1 can also be connected by the separator 9 by using the mounting holes formed by punching 7.

The ribs 3 of the form panel 1 have C
Since the mold slit 6 is provided and a large number of lid pieces 7 are formed,
The cover 7 can be punched out as appropriate to provide a mounting hole for the separator 9, or can be used for draining as needed. In addition, since the small ribs 5 are provided with a large number of drain holes 15, surplus water of the poured concrete can be positively discharged out of the formwork, and the strength of the structure can be made uniform. Can be.

Further, according to the above embodiment, the rib portion 3
The width of the groove is narrow (16mm), so the form tie 9
The conventional washer is not required when installing
Workability can be greatly improved, for example, the back plate can be attached, which was not possible conventionally. Then, a panel support member (runner guide) 22 mounted and fixed on the base surface 22
Since the fixing piece 23 is formed and the nail hole 30 is provided,
Concrete nails can be easily driven by using a hand hammer, and work efficiency can be improved.

The present invention is not limited to the above-described embodiment. For example, the projecting direction of the small rib 5 can be set to the front side, and other connecting means is used instead of the button connection. The design can be changed as appropriate, for example, two semicircular slits are arranged closer to each other and opposed to each other instead of the C-shaped slit 6.

[0026]

According to the present invention, as described above, since there is provided a no <br/> slit column cut-and-raised pieces protruding in front and back direction between <br/> rib formwork panel, each Select one of the slit rows and bend it to any angle and size according to the situation of the corner part of the site, centering on the slit row, it is possible to configure the formwork corner part on the site, the corner-only formwork panel It becomes unnecessary, and the management, transportation and handling of the product become easy, so that the cost can be significantly reduced and the formability can be improved (claim 1).

According to the second aspect of the present invention, since small ribs are provided on both sides of the slit and parallel to the rib portion, the panel strength can be increased.
When the panel is bent around the slit row, since the strength on both sides of the slit row is high, the bending force acts intensively on each joint portion of the slit, the fold is formed on a straight line of the slit row, and easily and The corner can be machined with high accuracy.

Further, according to the third aspect of the present invention, since a plurality of drain holes are provided in the small ribs, surplus water of the poured concrete can be smoothly discharged.
In the case where the corner portion is formed, the drainage hole is located at the corner, so that the drainage of the corner portion becomes good and the strength of the structure can be made uniform.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a top view of FIG.

FIG. 3 is an enlarged cross-sectional view taken along line AA of FIG. 1;

FIG. 4 is an enlarged sectional view taken along line BB of FIG. 1;

FIG. 5 is a partially omitted top plan view of FIG. 4;

FIG. 6 is an enlarged cross-sectional view taken along line CC of FIG. 1;

7 is a partially omitted top plan view of FIG. 6;

FIG. 8 is an enlarged cross-sectional view taken along line DD of FIG. 7;

FIG. 9 is a partially broken perspective view showing an assembled state of a mold using the mold panel according to the embodiment of the present invention.

FIG. 10 is an explanatory diagram of a connection status of adjacent form panels.

FIG. 11 is an explanatory diagram of the connection status of adjacent form panels.

FIG. 12 is a cross-sectional view showing a completed connection state of the adjacent form panels.

FIG. 13 is an enlarged perspective view of a fixing portion of the panel support member.

FIG. 14 is a vertical cross-sectional view showing a mounting state of a separator connecting the facing form panels.

FIG. 15 is an enlarged cross-sectional view showing an example of a form corner portion (outside) formed by the form panel according to the embodiment.

FIG. 16 is an enlarged cross-sectional view showing an example of a form corner portion (inside) formed by the form panel according to the embodiment.

FIG. 17 is a plan view showing an example of forming a formwork curved portion by the formwork panel according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Form panel 1A Back side 3 Rib part 3A Rib part 3B Rib part 4 Slit 5 Small rib 15 Drain hole

Claims (3)

(57) [Claims] 1. A metal formwork panel used as a weir plate of a formwork constituting an upright surface of skeleton concrete, wherein a rib portion extending in the longitudinal direction on the back or the front side of the panel has a predetermined widthwise direction. It is provided in parallel at intervals and is located at approximately the center between the ribs, and is parallel to the ribs and extends in the longitudinal direction.
A formwork panel characterized in that a number of bending slits having no cut-and-raised pieces protruding in the back direction are provided in a straight line at predetermined intervals. 2. The formwork panel according to claim 1, wherein small ribs are provided on both sides of the slit and are parallel to the rib portion. 3. The form panel according to claim 2, wherein a plurality of drain holes are provided at predetermined intervals in the longitudinal direction of the small rib.