JP2002201799A - Form assembling method and crosspiece fixing member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a form assembling method suitable for form using metallic form plates, and to provide a crosspiece fixing member suitable for use in the method. SOLUTION: A plurality of separators 2 are penetrated through the form plate 1 at suitable intervals, and a long crosspiece 3 formed of a pair of plate portions 3a and 3b intersecting each other like a hook in cross section, is arranged along a row of the separators 2 such that one of the plate portion 3a makes contact with an external surface of the form plate 1. Then, the plate portion 3a of the crosspiece 3, making contact with the form plate 3a is fixed to the form plate so as not to move in a direction that intersects the form plate, by using a first crosspiece fixing member 4 attached to a portion of the separator 2, which protrudes from the form plate, and the plate portion 3b intersecting the form plate is fixed to the form plate so as not to move in a direction in parallel with the form plate, by using a second crosspiece fixing member 5 fixed to a portion of the separator 2 other than the separator to which the first crosspiece fixing member is attached.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a formwork suitable for a formwork using a metal formwork plate and a crosspiece fixing member used for the method.

[0002]

2. Description of the Related Art In a conventional general formwork, a steel pipe is used as a crosspiece for reinforcement attached along the outer surface of a formwork plate. The steel pipe is attached as shown in FIG.
That is, a separator 2 is provided in a pair of opposed frame plates 1 so that both ends protrude outside the frame plate 1, and a foam is formed on a male screw portion 2 a formed at an end of the separator 2. The tie 20 is screwed. Then, the steel pipe 21 is disposed on the foam tie 20 in the lateral direction, and the fastener 22 is applied to the steel pipe from outside, and the slot 20a of the foam tie is formed.
The steel pipe 21 is fixed to the outer surface of the form plate 1 by inserting a wedge 23 into the steel pipe 21 with the fastener 22 and tightening the steel pipe 21. Note that the fastener 22 and the wedge 23 are connected by a chain 24.

[0003] After the cast concrete has hardened, the formwork assembled in this manner is subjected to a wedge 23, a fastener 22,
The steel pipe 21 and the foam tie 20 are removed and dismantled in this order. When the form plate 1 is made of plywood, the form plate 1 is also peeled off from the skeleton concrete. After that, the foundation concrete part is backfilled with soil.

[0004]

As described above, the above-mentioned conventional formwork had to be dismantled after the stiffening of the concrete of the skeleton, so that it took a long construction period from assembling the formwork to backfilling. In addition, steel pipe 21, foam tie 20,
Since the fastener 22 is heavy and bulky, a great deal of labor was required for loading and unloading the material.

[0005] If a metal form plate that can be back-filled together with the skeleton concrete is used, the crosspieces and other auxiliary members other than the form plate can be back-filled without dismantling. However, conventionally used auxiliary members such as steel pipes, foam ties, and fasteners are economically problematic because of their high unit price, and since the formwork using these has a large protrusion, there is no It was impossible.

Accordingly, the present invention is directed to a mold assembly method suitable for a mold using a metal mold plate and capable of being buried without being dismantled even after the concrete is hardened, and suitable for use therein. It is an object of the present invention to provide a simple cross member fixing member.

[0007]

First, a method of assembling a mold according to the present invention is to provide a mold plate in which a plurality of separators are penetrated at appropriate intervals on a mold plate, and a pair of flat portions intersect each other in a hook-like cross section. The crosspiece is disposed along the rows of the plurality of separators in a state in which one flat portion of the crosspiece is in contact with the outer surface of the form plate, and the flat portion of the crosspiece that contacts the form plate is formed of an arbitrary separator. A first beam fixing member attached to a portion projecting from the form plate is fixed so as not to move in a direction intersecting with the form plate, and a flat plate portion intersecting with the form plate of the beam is connected to the first beam. It is characterized in that it is fixed so as not to move in a direction parallel to the form plate by a second cross member fixing member attached to a portion of the separator protruding from the form plate other than the separator to which the fixing member is attached.

The first beam fixing member has a form plate contact surface, and a bar press surface that is located at a position retracted by a predetermined distance with respect to an extended surface of the form plate contact surface. It is preferable that the separator insertion hole communicating from the frame plate contact surface side to the opposite surface side is formed. By setting the above-mentioned predetermined distance to an appropriate value corresponding to the thickness of the crosspiece, the flat plate portion in which the formplate contact surface of the first crosspiece fixing member attached to the separator is in contact with the formplate of the crosspiece is formed by the formwork. It can be fixed so that it does not move in the direction crossing the board.

In the first cross member fixing member, the cross member holding surface is arranged such that the closer to the form plate contact surface, the greater the distance from the extension surface of the form plate contact surface. Then, the first crosspiece fixing member comes into contact with the crosspiece only at a part thereof, and the first crosspiece fixing member is cut into the crosspiece, so that the first and second crosspieces do not slip easily with each other. When the crosspiece holding surface has the above-described shape, a wire or a wire such as a wire can be held between the form plate and the first crosspiece fixing member instead of the crosspiece having a hook-shaped cross section. .

The second crosspiece fixing member includes a form plate contact surface and an opening on the side of the extension surface formed at a position retracted by a predetermined distance from the extension surface of the form plate contact surface. And a crosspiece holding groove formed therein, and a separator insertion hole communicating from the mold plate plate contact surface side to the opposite surface side is formed. By setting the above-mentioned predetermined distance to an appropriate value corresponding to the width of the form reinforcement plate, the flat plate portion in which the crosspiece holding groove of the second crosspiece fixing member attached to the separator intersects with the formwork plate of the crosspiece is formed. It can be fixed so as not to move in the direction parallel to the frame plate.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. FIG. 1 is a side sectional view of a mold according to the present invention;
FIG. 2 is a perspective view of the main part. The formwork includes a formwork plate 1, a separator 2, an angle steel 3 as a crosspiece, a first crosspiece fixing member 4, a second crosspiece fixing member 5, a nut 6, and a linear body 7 such as a wire or a wire. Are used. The form plate 1 is not particularly limited, but a metal form plate that can be back-filled together with the concrete body is suitable. A conventionally known separator is used as the separator 2. The angle steel 3 is a long steel material having a hook-shaped cross section in which a pair of flat plate portions 3a and 3b cross each other at an angle of 90 degrees, and can be generally used.

As shown in FIG. 3, the first beam fixing member 4 includes a base portion 4a having one surface serving as a frame plate contact surface F1 and an action portion 4b having one surface serving as a bar pressing surface F2. Has become. A step 4c is provided between the two portions, and the crosspiece pressing surface F2 is located at a position retracted from the extension of the form plate contact surface F1. The retreat distance corresponds to the thickness of the angle steel 3 at the tip end of the crosspiece holding surface F2, and is larger on the side closer to the form plate contact surface F1. That is, the crosspiece pressing surface F2 is inclined with respect to the extension surface of the form plate contact surface F1.

Bent edges 4d, 4d are provided at both left and right ends of the base portion 4a and the action portion 4b to improve strength.
For this reason, it is possible to reduce the thickness (for example, 1.6 mm). The base portion 4a is provided with a separator insertion hole 4e communicating from the form plate contact surface F1 side to the opposite surface side. The action portion 4b is provided with a striated body insertion hole 4f formed by extruding an interval between two parallel cuts to the side opposite to the crosspiece pressing surface F2.

As shown in FIG. 4, the second beam fixing member 5 has a base portion 5a having one surface serving as a form plate contact surface F3, and an action portion 5b extending obliquely to the base portion. The crosspiece holding groove 5c is formed at the tip of the action portion 5b. The crosspiece holding groove 5c opens to the extension surface side of the form plate contact surface F3, and the distance from the extension surface to the bottom of the crosspiece holding groove 5c corresponds to the vertical and horizontal width of the angle steel 3.

The second beam fixing member 5 is also a first beam fixing member 4.
Similarly to the above, bent edges 5d are provided at both left and right ends. A separator insertion hole 5e and a striated body insertion hole 5f similar to those of the first crosspiece fixing member 4 are provided in the base 5a and the action portion 5b, respectively.

Next, the order of assembling the formwork according to the present invention will be described. First, the form plate 1 is built on the panel base 11 fixed on the discarded concrete 10. Then
The separator 2 is inserted into the pair of form plates 1 and 1 facing each other, and the threaded portions 2 a at both ends thereof are projected out of the form plate 1. Similarly, a plurality of separators 2 are inserted into the form plates 1 and 1 at appropriate intervals in the horizontal direction.

Then, as shown in FIG. 5, an angle steel 3 is arranged above the row of the plurality of separators 2 and tightened by a first beam fixing member 4 attached to any appropriate separator 2. Fix it. In the fixing method, the separator 2 is inserted into the separator insertion hole 4e of the first crosspiece fixing member 4, the form plate contact surface F1 of the first crosspiece fixing member 4 contacts the form plate 1, and Crosspiece holding surface F2 is angle steel 3
The nut 6 is screwed onto the threaded portion 2a of the separator 2 in a state of contact with the vertical flat plate portion 3a, and the first beam fixing member 4 is tightened so as to be in close contact with the form plate 1. Thus, the angle steel 3 sandwiched between the form plate 1 and the first beam fixing member 4
Is fixed so as not to move in a direction intersecting with the form plate 1. Beam material holding surface F2 is angle steel 3
Is inclined with respect to the vertical flat plate portion 3a, so that a part of the first beam fixing member 4 bites into the angle steel 3, and the two 3 and 4 are hardly displaced in the vertical direction, and the fixing is strong. It should be noted that if the crosspiece pressing surface F2 is formed in a jagged cross section, it is more difficult to shift.

As shown in FIG. 6, the angle steel 3 is fastened and fixed by the second beam fixing member 5 attached to another separator 2. The fixing method is as follows.
Is inserted into the separator insertion hole 5e of the second beam fixing member 5, the form plate contact surface F3 of the second beam fixing member 5 contacts the frame plate 1, and the beam holding groove 5c is angled. A nut 6 is screwed onto the screw portion 2a of the separator 2 in a state where the nut 6 is engaged with the front end portion of the horizontal flat plate portion 3b of the steel 3 and tightened so that the second beam fixing member 5 comes into close contact with the form plate 1. . Thereby, the vertical movement of the horizontal flat plate portion 3b of the angle steel 3 is restricted, and the angle steel 3 is fixed so as not to move in a direction parallel to the form plate 1.

As described above, the two types of beam fixing members 4, 5
By fixing the angle steel 3 by using, the angle steel 3 can be fixed so as not to move in a direction intersecting with and parallel to the form plate 1. In the conventional form shown in FIG. 10, when a vibrator is applied to the poured concrete, the wedge 23 is lifted by vibration, and
When the steel pipe 21 is loosened, the formwork may be deformed or sometimes the formwork may be broken. The formwork according to the invention is
Since the angle steel 3 is completely fixed, the above accident can be prevented. There is no particular limitation on which part of the angle steel 3 is fixed by which of the beam fixing members 4 and 5, but the butted portion of the two angle steels 3 is fixed by using the second beam fixing member 5. (Fig. 2
), The heights of the angle steels 3 and 3 can be made uniform, and the accuracy of the formwork is increased.

Instead of using the beam fixing members 4 and 5, a method of inserting the separator into the separator insertion hole formed in the angle steel 3 and directly tightening the angle steel 3 with a nut can also be considered. However, in this method, since the work of forming a separator insertion hole in the angle steel 3 must be performed on site, it takes time and effort to assemble, and it is difficult to form the separator insertion hole at an accurate position, and the accuracy of the mold is reduced. Unrealistic because it cannot be secured.

In order to prevent the form from collapsing, it is preferable to install a pipe supporter 12 whose length can be adjusted between the form plate 1 (or the beam fixing members 4 and 5) and the ground as required. In some cases, a striated body 7 such as a wire or a wire may be stretched between the first beam fixing member 4 or the second beam fixing member 5 and the pile 13 driven into the ground. Striatum 7
Is stretched, the mold is prevented from falling down to the side opposite to the striated body 7, so that the mold has a structure that is strong against overturning due to the load of the cast concrete. As shown by the two-dot chain line in FIGS.
The striated body 7 can be connected to the first beam fixing member 4 and the second beam fixing member 5 using 5f. In addition, 7a
Is a turnbuckle mechanism for adjusting the length of the striatum 7.

As a method for fixing the angle steel 3 by the second crosspiece fixing member 5, as shown in FIG. 7, the angle steel 3 is arranged below the separator 2 and the crosspiece holding groove 5c is on the lower side. The angle steel 3 may be fixed by the second beam fixing member 5 attached to the separator 2 as described above.

As shown in FIG. 8, the first beam fixing member 4 can be used for fixing a flat bar 13 or a band. Further, the beam holding surface F of the first beam fixing member 4
Utilizing the fact that 2 is oblique, the striated body 7 can be held between the form plate 1 and the action portion 4b of the first crosspiece fixing member 4, as shown in FIG. Therefore, it is tightened to a state surrounding the formwork with a band or a striated body,
The strength of the mold can be improved.

Finally, a safety cap 14 is provided on the upper end of the form plate 1.
Is attached to complete the formwork. Then, skeleton concrete is poured into the formwork. Thereafter, the formwork is backfilled without dismantling.

The formwork assembled in this manner is different from the conventional formwork in that angle steel 3 is used instead of the steel pipe 21 as the crosspiece, and the first crosspiece is fixed instead of the fastener 22 and the wedge 23 for fixing the crosspiece. A nut 6 is used instead of the member 4, the second beam fixing member 5, and the foam tie 20. For example, angle steel of length 40mm x width 40mm x thickness 3mm and length 60mm x
When compared with a steel pipe having a width of 60 mm and a thickness of 1.6 mm, the former is about 1 / 1.6 in weight and about 1 / in volume (bulk) with respect to the latter.
1.3, about 1/3 in price. Further, when comparing the first beam fixing member and the second beam fixing member of a size suitable for fixing the angle steel and the fastener and the wedge of a size suitable for fixing the steel pipe, the former is the latter. The weight is about 1/4, the volume is about 1/6, and the price is about 1 / 2.4. In comparison between the nut and the foam tie, the former is about 1/20 in weight, about 1/25 in volume, and about 1/27 in price compared to the latter.

[0026]

As described above, the method of assembling a formwork according to the present invention allows the concrete to be backfilled without dismantling after placing the concrete body. The construction period can be significantly shortened as compared with the formwork, and the auxiliary materials other than the formwork plate are inexpensive, bulky and the transportation cost is low, so that the cost can be significantly reduced.

Further, by using the first beam fixing member and the second beam fixing member for assembling the formwork, the crosspiece having a hook-shaped cross section can be accurately and easily fixed to the outer surface of the formwork plate. This is effective in improving the accuracy of the formwork and the workability.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a mold.

FIG. 2 is a perspective view of a main part of a mold.

FIG. 3 is a perspective view of a first beam fixing member.

FIG. 4 is a perspective view of a second beam fixing member.

FIG. 5 is a side view of an angle steel mounting portion by a first beam fixing member.

FIG. 6 is a side view of an angle steel mounting portion by a second beam fixing member.

FIG. 7 is a side view showing a different mounting method of the angle steel by the second beam fixing member.

FIG. 8 is a side view showing a method of attaching a flat plate by the first beam fixing member.

FIG. 9 is a side view showing a method of attaching the umbilical member by the first beam fixing member.

FIG. 10 is a side view of a conventional reinforcing member mounting portion.

[Explanation of symbols]

 F1, F3 Form plate contact surface F2 Beam holding surface 1 Form plate 2 Separator 3 Angle steel (beam) 4 First beam fixing member 4e Separator insertion hole 5 Second beam fixing member 5c Beam holding groove 5e Separator insertion hole 6 Nut 7 Striated body

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Fujiwara Kyou 3-17-2 Miyoshi-cho, Fuchu-shi, Tokyo 21-303 F-term (reference) 2E177 HA04 JA03 KC01

Claims (4)

[Claims] A plurality of separators are provided at appropriate intervals in a form plate so as to penetrate therethrough, and a pair of flat portions are formed in such a shape that their cross sections intersect with each other in a hook shape. The first beam fixing member, which is arranged along the row of the plurality of separators in a state of being in contact with the outer surface of the separator, and a flat plate portion of the beam which is in contact with the frame plate is attached to a portion protruding from the frame plate of any separator. Along with fixing so as not to move in the direction intersecting with the formwork plate, a flat plate portion intersecting with the formwork plate of the crosspiece is separated from the formwork plate of the separator different from the separator to which the first crosspiece fixing member is attached. A method for assembling a formwork, comprising fixing a second crosspiece fixing member attached to a projecting portion so as not to move in a direction parallel to the formwork plate. 2. A mold plate contacting surface, and a beam pressing surface which is located at a position retracted by a predetermined distance with respect to an extension surface of the mold plate contacting surface. A crosspiece fixing member, wherein a separator insertion hole communicating with the opposite surface side is formed. 3. The crosspiece fixing according to claim 2, wherein a distance from the extension surface of the formplate contact surface increases as the side of the crosspiece pressing surface is closer to the formplate contact surface. Element. 4. A form plate contact surface, and a crosspiece holding groove formed at a position retracted by a predetermined distance with respect to an extension surface of the form plate contact surface and opening on the extension surface side, A crosspiece fixing member, wherein a separator insertion hole communicating from the mold plate plate contact surface side to the opposite surface side is formed.