JP4375899B2 - Form assembly method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mold assembly method suitable for a mold using a metal mold plate.
[0002]
[Prior art]
In conventional general molds, steel pipes have been used as reinforcing bars that are attached along the outer surface of the mold plate. The steel pipe is attached as shown in FIG. That is, a separator 2 is provided through a pair of opposing mold plates 1 so that both end portions protrude outward from the mold plate 1, and a foam is formed on a male screw portion 2 a formed at the end of the separator 2. Tie (registered trademark) 20 is screwed. Then, a steel pipe 21 is disposed on the foam tie 20 in the lateral direction, a fastener 22 is applied to the steel pipe from the outside, a wedge 23 is inserted into the groove 20a of the foam tie 20 , and the steel pipe 21 is tightened with the fastener 22. The steel pipe 21 is fixed to the outer surface of the mold plate 1. The fastener 22 and the wedge 23 are connected by a chain 24.
[0003]
After the cast concrete has hardened, the mold thus assembled is removed and disassembled in the order of the wedge 23, the fastener 22, the steel pipe 21, and the foam tie 20. When the formwork board 1 is made of plywood, the formwork board 1 is also peeled off from the frame concrete. After that, the foundation concrete part is backfilled with soil.
[0004]
[Problems to be solved by the invention]
As described above, the conventional formwork had to be dismantled after the hardened concrete was hardened, so it took a long period of time from assembly of the formwork to backfilling. Moreover, since the steel pipe 21, the foam tie 20, and the fastener 22 are heavy and bulky, much labor is required to carry in and out the material.
[0005]
If a metal formwork plate that can be backfilled together with the frame concrete is used, the crosspieces other than the formwork plate and other auxiliary members can be refilled as they are without being disassembled. However, the conventional auxiliary members such as steel pipes, foam ties and fasteners have a high unit price, which is economically problematic, and the formwork using these has a large bulge, so it is structurally necessary to refill as it is. It was impossible.
[0006]
Therefore, the present invention is suitable for a form using a metal form plate, and a method for assembling a form that can be refilled as it is without being dismantled after the concrete is hardened, and a crosspiece suitable for use in the form. It is an object of the present invention to provide a fixing member.
[0007]
[Means for Solving the Problems]
First, in the method for assembling a mold according to the present invention, a long crosspiece having a shape in which a plurality of separators are provided through a mold plate at an appropriate interval so that a pair of flat plate portions cross each other in a cross-sectional shape. The flat plate portion is arranged along the row of the plurality of separators in a state where the flat plate portion is in contact with the outer surface of the formwork plate, and the flat plate portion that is in contact with the formwork plate of the crosspiece is attached to a portion protruding from the formwork plate of any separator The first crosspiece fixing member is fixed so as not to move in the direction intersecting the formwork plate, and the flat plate portion intersecting the formwork plate of the crosspiece is separated from the separator to which the first crosspiece fixing member is attached. The separator is fixed so as not to move in a direction parallel to the mold plate with a second crosspiece fixing member attached to a portion protruding from the mold plate of the separator.
[0008]
The first crosspiece fixing member includes a formwork plate contact surface and a crosspiece holding surface at a position retracted by a predetermined distance with respect to an extended surface of the formwork plate contact surface. A structure having a separator insertion hole communicating from the contact surface side to the opposite surface side is preferable. By setting the predetermined distance to an appropriate value corresponding to the thickness of the crosspiece, the flat plate portion where the formwork plate contact surface of the first crosspiece fixing member attached to the separator contacts the formwork plate of the crosspiece is used as the formwork. Can be fixed so that it does not move in the direction that intersects the board.
[0009]
In the first crosspiece fixing member, when the crosspiece pressing surface is closer to the mold plate contact surface, the distance from the extended surface of the mold plate contact surface is larger. Since one crosspiece fixing member comes into contact with the crosspiece only at a part and the first crosspiece fixing member bites into the crosspiece, the two are less likely to slip each other. In addition, when the crosspiece pressing surface has the above-described shape, it is possible to hold a wire body such as a wire or a wire in place of the crosspiece-shaped crosspiece between the mold plate and the first crosspiece fixing member. .
[0010]
Further, as the second crosspiece fixing member, the crosspiece opening on the extension surface side formed at a position retracted by a predetermined distance with respect to the mold plate contact surface and the extended surface of the mold plate contact surface. A structure having a holding groove and having a separator insertion hole that communicates from the form plate contact surface side to the opposite surface side is preferable. By setting the predetermined distance to an appropriate value corresponding to the width of the formwork reinforcement plate, the flat plate portion where the crosspiece holding groove of the second crosspiece fixing member attached to the separator intersects the formwork plate of the crosspiece is molded. Can be fixed so as not to move in the direction parallel to the frame plate.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be specifically described with reference to the drawings.
FIG. 1 is a side sectional view of a mold according to the present invention, and FIG. 2 is a perspective view of an essential part thereof. The formwork includes a formwork plate 1, a separator 2, angle steel 3 as a crosspiece, a first crosspiece fixing member 4, a second crosspiece fixing member 5, a nut 6, and a wire body 7 such as a wire or a wire. Etc. are used. The form plate 1 is not particularly limited, but a metal form plate that can be backfilled together with the frame concrete is suitable. The separator 2 uses a conventionally known separator. The angle steel 3 is a long steel material having a bowl-shaped cross-section in which a pair of flat plate portions 3a and 3b cross each other at an angle of 90 degrees.
[0012]
As shown in FIG. 3, the first crosspiece fixing member 4 includes a base portion 4a having one surface serving as a formwork plate contact surface F1, and an action portion 4b having one surface serving as a crosspiece pressing surface F2. . A step 4c is provided between the two portions, and the crosspiece pressing surface F2 is in a position retracted from the extended surface of the formwork plate contact surface F1. The retreat distance corresponds to the thickness of the angle steel 3 at the front end portion of the crosspiece pressing surface F2, and is larger on the side closer to the formwork plate contact surface F1. That is, the crosspiece pressing surface F2 is inclined with respect to the extended surface of the mold plate contact surface F1.
[0013]
Bending edges 4d and 4d are provided at the left and right ends of the base portion 4a and the action portion 4b to improve the strength. For this reason, it is possible to reduce the thickness (for example, 1.6 mm). The base 4a has a separator insertion hole 4e that communicates from the form plate contact surface F1 side to the opposite surface side. Further, the action portion 4b is provided with a linear member insertion hole 4f formed by pushing out a parallel interval between two cuts to the side opposite to the crosspiece pressing surface F2.
[0014]
As shown in FIG. 4, the second crosspiece fixing member 5 includes a base portion 5 a having one surface serving as a mold plate contact surface F <b> 3 and an action portion 5 b extending obliquely with respect to the base portion. A crosspiece holding groove 5c is formed at the tip of the action portion 5b. The crosspiece holding groove 5c opens to the extended surface side of the form plate contact surface F3, and the distance from the extended surface to the bottom of the crosspiece holding groove 5c corresponds to the vertical and horizontal widths of the angle steel 3.
[0015]
Similarly to the first crosspiece fixing member 4, the second crosspiece fixing member 5 is provided with bent edges 5d and 5d at both left and right ends. Moreover, the separator insertion hole 5e and the linear body insertion hole 5f similar to the 1st crosspiece fixing member 4 are each provided in the base part 5a and the action part 5b.
[0016]
Next, the assembly sequence of the mold according to the present invention will be described.
First, the formwork plate 1 is built in the panel base 11 fixed on the discarded concrete 10. Next, the separator 2 is inserted into a pair of mold plates 1, 1 facing each other, and both-end screw portions 2 a are protruded outward from the mold plate 1. Similarly, a plurality of separators 2 are inserted through the mold plates 1 and 1 at appropriate intervals in the horizontal direction.
[0017]
Then, as shown in FIG. 5, the angle steel 3 is arranged on the upper side of the row of the plurality of separators 2, and this is fastened and fixed by the first crosspiece fixing member 4 attached to any appropriate separator 2. The fixing method is such that 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 is in contact with the form plate 1, and With the crosspiece pressing surface F2 in contact with the vertical flat plate portion 3a of the angle steel 3, a nut 6 is screwed onto the threaded portion 2a of the separator 2 so that the first crosspiece fixing member 4 comes into close contact with the mold plate 1. Tighten as follows. Thereby, the vertical flat plate portion 3 a of the angle steel 3 sandwiched between the mold plate 1 and the first crosspiece fixing member 4 is fixed so as not to move in the direction intersecting the mold plate 1. Since the crosspiece pressing surface F2 is inclined with respect to the vertical flat plate portion 3a of the angle steel 3, a part of the first crosspiece fixing member 4 is bitten into the angle steel 3, and both 3 and 4 are vertically moved. It is hard to slip and is firmly fixed. In addition, it will be hard to shift | deviate if the crosspiece pressing surface F2 is shape | molded in a cross-sectional jagged shape.
[0018]
In addition, as shown in FIG. 6, the angle steel 3 is fastened and fixed by a second crosspiece fixing member 5 attached to another separator 2. The fixing method is that the separator 2 is inserted into the separator insertion hole 5e of the second crosspiece fixing member 5, the formwork plate contact surface F3 of the second crosspiece fixing member 5 is in contact with the formwork plate 1, and In a state where the crosspiece holding groove 5c is engaged with the tip of the horizontal flat plate portion 3b of the angle steel 3, a nut 6 is screwed onto the screw portion 2a of the separator 2 so that the second crosspiece fixing member 5 is a form plate. Tighten to 1 Thereby, the vertical movement of the horizontal flat plate portion 3 b 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 mold plate 1.
[0019]
Thus, by fixing the angle steel 3 using the two kinds of crosspiece fixing members 4 and 5, the angle steel 3 is fixed so as not to move in a direction intersecting or parallel to the formwork plate 1. can do. In the conventional formwork shown in FIG. 10, when a vibrator is applied to the placed concrete, the wedge 23 is lifted by vibration, and the fasteners 22 and the steel pipe 21 are loosened, whereby the formwork is deformed or sometimes the formwork is broken. There was something to do. Since the angle steel 3 is completely fixed to the mold according to the present invention, the above accident can be prevented. There is no particular limitation as to which part of the angle steel 3 is fixed by which crosspiece fixing member 4, 5, but the butted portion of the two angle steels 3, 3 is fixed using the second crosspiece fixing member 5 If it does so (refer FIG. 2), the height of both the angle steels 3 and 3 can be arrange | equalized, and the precision of a formwork will become high.
[0020]
Of course, a method of inserting the separator into the separator insertion hole formed in the angle steel 3 and directly fastening the angle steel 3 with a nut without using the crosspiece fixing members 4 and 5 is also conceivable. However, in this method, since the work for opening the separator insertion hole in the angle steel 3 has to be performed on site, it takes time and effort to assemble, and it is difficult to make the separator insertion hole at an accurate position, which increases the accuracy of the formwork It is unrealistic because it cannot be secured.
[0021]
In order to prevent the mold from collapsing, a pipe supporter 12 having an adjustable length may be installed between the mold plate 1 (or the crosspiece fixing members 4 and 5) and the ground as necessary. In some cases, a wire 7 or a wire rod 7 may be stretched between the first crosspiece fixing member 4 or the second crosspiece fixing member 5 and the pile 13 driven into the ground. When the striate body 7 is stretched, the formwork is restricted from falling to the opposite side of the striate body 7, so that the formwork has a structure that is strong against a fall due to the load of the placed concrete. . As shown by a two-dot chain line in FIG. 5 and FIG. 6, the linear member 7 can be tied to the first cross member fixing member 4 and the second cross member fixing member 5 using the linear member insertion holes 4f and 5f. it can. In addition, 7a is a turnbuckle mechanism for adjusting the length of the filament 7.
[0022]
As shown in FIG. 7, as the method of fixing the angle steel 3 by the second crosspiece fixing member 5, the angle steel 3 is arranged on the lower side of the separator 2 so that the crosspiece holding groove 5c is on the lower side. You may fix the angle steel 3 with the 2nd crosspiece fixing member 5 attached to 2. FIG.
[0023]
Moreover, as shown in FIG. 8, the 1st crosspiece fixing member 4 can be used for fixation of the flat crosspiece 13 or a strip | belt-shaped body. Furthermore, using the fact that the crosspiece pressing surface F2 of the first crosspiece fixing member 4 is inclined, as shown in FIG. 9, the form plate 1 and the action portion 4b of the first crosspiece fixing member 4 It is also possible to hold the filament 7 between the two. Therefore, the strength of the formwork can be improved by tightening the formwork so as to surround the formwork by the belt-like body or the line body.
[0024]
Finally, a safety cap 14 is attached to the upper end of the mold plate 1 to complete the mold. Then, the concrete frame is placed in the formwork. Thereafter, the formwork is backfilled without being dismantled.
[0025]
Compared to the conventional formwork, the formwork assembled in this way is the angle steel 3 instead of the steel pipe 21 as a crosspiece, and the first crosspiece fixing member 4 instead of the clamp 22 and the wedge 23 for fixing the crosspiece. A nut 6 is used instead of the second crosspiece fixing member 5 and the foam tie 20. For example, when comparing an angle steel 40mm long x 40mm wide x 3mm thick with a steel pipe 60mm long x 60mm wide x 1.6mm thick, the former is approximately 1 / 1.6 by weight and the volume (bulk). Is about 1 / 1.3, and the price is about 1/3. In addition, when comparing the first crosspiece fixing member and the second crosspiece fixing member having a size suitable for fixing the angle steel with the fasteners and wedges having a size suitable for fixing the steel pipe, the former is the latter. In comparison, the weight is about 1/4, the volume is about 1/6 and the price is about 1 / 2.4. In comparison with the nut and the foam tie, the former is about 1/20 in weight, 1/25 in volume, and 1/27 in price with respect to the latter.
[0026]
【The invention's effect】
As described above, the formwork assembling method according to the present invention can be refilled as it is without disassembling after placing the concrete, and compared with the formwork of the conventional assembling method. The construction period can be remarkably shortened, and the auxiliary materials other than the formwork plate are inexpensive, and they are not bulky and the transportation cost is low. Therefore, the cost can be greatly reduced.
[0027]
In addition, by using the first crosspiece fixing member and the second crosspiece fixing member for assembling the formwork, the crosspiece-shaped crosspiece can be accurately and easily fixed to the outer surface of the formwork plate. It is effective to improve the accuracy of the frame and 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 formwork.
FIG. 3 is a perspective view of a first crosspiece fixing member.
FIG. 4 is a perspective view of a second crosspiece fixing member.
FIG. 5 is a side view of an angle steel mounting portion by a first crosspiece fixing member.
FIG. 6 is a side view of an angle steel mounting portion by a second crosspiece fixing member.
FIG. 7 is a side view showing different attachment methods of angle steel by a second crosspiece fixing member.
FIG. 8 is a side view showing a method of attaching a flat plate by the first crosspiece fixing member.
FIG. 9 is a side view showing a method for attaching a wire body by a first crosspiece fixing member.
FIG. 10 is a side view of a conventional reinforcing material attaching portion.
[Explanation of symbols]
F1, F3 Formwork plate contact surface F2 Crosspiece pressing surface 1 Formwork plate 2 Separator 3 Angle steel (crosspiece)
4 first crosspiece fixing member 4e separator insertion hole 5 second crosspiece fixing member 5c crosspiece holding groove 5e separator insertion hole 6 nut 7 wire

Claims (1)

  A state in which a long crosspiece is provided in which a plurality of separators are provided through a mold plate at appropriate intervals so that a pair of flat plate portions intersect each other in a cross-sectional shape, and one flat plate portion is in contact with the outer surface of the mold plate The first crosspiece fixing member is arranged along the row of the plurality of separators, and the flat plate portion in contact with the formwork plate of the crosspiece is attached to a portion protruding from the formwork plate of any separator. Fix the plate so that it does not move in the intersecting direction, and attach the flat plate that intersects the form plate of the crosspiece to the part that protrudes from the formwork plate of the separator different from the separator to which the first crosspiece fixing member is attached. A mold assembling method, wherein the second crosspiece fixing member is fixed so as not to move in a direction parallel to the mold plate.

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