JPH1046809A - Formwork clamping device for independent concrete column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the construction work easier in a narrow space when clamping from the outer periphery for reinforcing a rectangular column formworks. SOLUTION: A formwork clamp device comprises two lateral joists 11 facing each other around the rectangular column formwork 8 and two lateral joists 12 facing each other is the direction perpendicular to the joints 11. Each lateral joist 11 or 12 comprises a lever member 15 or 18 contacted to the outer surface of the column formwork 8 and a truss 17 or 20 fixed to the outer side surface of the lever member 15 or 18 in a detachable manner. Connections of these members are performed with bolts and nuts for example. The lateral joists 11 and 12 have trusses 17 or 20 in construction so that a sufficient strength can be obtained with a light weight. Also, the trusses 17 and 20 can be separated from the lever members 15 and 17, so that individual member can be made to a small size and a light weight. Therefore, even tough a working area is narrow as in the case where scaffolding for frameworks is located around it, the members can be carried in easily and the work can be performed easily. If the trusses 17 and 18 are made of a plurality of truss pieces 16 and 19 in construction, then individual member can be made much lighter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a form clamping apparatus for a concrete independent column for tightening and fixing a column form from the outer periphery for reinforcing a rectangular cylindrical column form.

[0002]

2. Description of the Related Art Generally, the above-described mold clamping apparatus is generally configured as shown in FIG.
As shown in the plan view of FIG. 1, the horizontal fluttering members 2 and 3 are horizontally applied to the four outer surfaces of the rectangular column form 1 respectively, and the mutually crossing ends of the adjacent horizontal fluttering members 2 and 3 are connected to each other. At the time of the connection, each of the transverse fluttering members 2 and 3 is connected in such a manner as to be drawn inward (that is, toward the center of the column form), and the column form 1 is tightened and fixed (Japanese Utility Model Publication No. 46-900).
No. 5). As shown in FIG. 9, this form clamp device 5 uses one horizontal fluttering member 2 in which two upper and lower channel steels are joined at an interval, and the other horizontal fluttering member 3 is a simple channel steel. The ends of the other horizontal flap material 3 are inserted between the upper and lower channel steels of one horizontal flap material 2 so that the ends of the two flaps 3 intersect. The cotter 6 is driven into the cotter holes 2a and 3a drilled near the ends of the cotter, and the horizontal flutter members 2 and 3 are drawn inward by the wedge effect and connected.

[0003]

There is no particular problem in the conventional form clamping device 5 as long as it is used for a small column form, but when it is used for a large column form, each horizontal fluttering material is used. Since it is necessary to increase the length according to the scale of the column formwork and to have sufficient strength to function as reinforcement for the large column formwork, the size of each horizontal fluttering material 2, 3 used Therefore, there is a problem that the workability of construction of the form clamp device 5 is significantly reduced.

[0004] In addition, for example, in the case where concrete is added with a predetermined thickness to the periphery of an existing concrete independent column to reinforce the existing concrete independent column, a framed scaffold is assembled around the existing concrete independent column. The space between the column and the surface of the pillar is small, and especially as described above, when the size of the horizontal
There is also a problem that it becomes difficult to carry 3 between the column formwork and the framework scaffold.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional disadvantages, and it is possible to secure sufficient strength without increasing the weight of a horizontal fluttering material, and to easily construct each component even in a narrow space. It is an object of the present invention to provide a form clamp device for a concrete independent column that can be carried into a concrete column.

[0006]

In order to solve the above-mentioned problems, the present invention is to apply a horizontal flutter material horizontally to each of four outer surfaces of a rectangular cylindrical column form, and to connect end portions of adjacent horizontal flutter materials. In the form clamping apparatus for a concrete independent column, which tightens and fixes the column form, the lateral fluttering material is detachably fixed to a rod applied to an outer surface of the column form and an outer surface of the rod. And a truss forming a truss structure in a horizontal plane.

According to a second aspect of the present invention, in the form clamping apparatus for independent concrete columns according to the first aspect, the first horizontal fluttering material on two opposite sides of the column formwork and the two first lateral fluttering members facing in a direction perpendicular to the first horizontal fluttering material. Each of the four horizontal flaps in the four horizontal flaps is made up of two pieces of rods which are vertically spaced apart from each other, and the upper and lower two Each of the two rod pieces has a step portion sandwiched between upper and lower rod pieces of the first horizontal flutter member on each side at different one end portions, and the first horizontal flutter rod has a stepped portion. The truss is detachably fixed to each of the upper and lower rod pieces of the material and the upper and lower rod pieces of the second horizontal fluttering material, and each of the upper and lower trusses is connected by a connecting member. .

In a third aspect, the truss in the first aspect is
It is characterized by comprising a plurality of detachable truss pieces divided in the longitudinal direction of the horizontal fluttering material. Claim 4 is Claim 3
The truss is characterized in that two almost right-angled triangular truss pieces having right angles at the center of the rod are combined symmetrically to form a triangular truss structure with the center of the rod at the top as a whole. And

[0009]

FIG. 1 is a block diagram showing an embodiment of the present invention.
A description will be given with reference to a form clamping device of one embodiment shown in FIGS. As shown in FIG. 1, this embodiment is applied to the reinforcement work of an existing concrete independent column 7, and a rectangular cylindrical column form 8 constructed around the concrete independent column 7 is fastened and fixed. is there. Reference numeral 9 denotes a framework scaffold assembled around the frame. The form clamping device 10 includes two opposing sides of a first horizontal flap material 11 and two sides of a second horizontal flap material 12 facing in a direction orthogonal thereto. The first horizontal fluttering member 11 is divided into a rod member 15 applied to the outer surface of the column formwork 8 and two right and left truss pieces 16.
The truss 17 is detachably fixed to the outer surface of the truss 5 and forms a truss structure in a horizontal plane. Similarly, the second horizontal fluttering member 12 is divided into a rod member 18 applied to the outer surface of the column formwork 8 and two left and right truss pieces 19 and is detachably fixed to the outer surface of the rod member 18. And a truss 20 forming a truss structure in a horizontal plane.

The details of the first horizontal fluttering member 11 will be described with reference to FIGS. In this embodiment, the first
The rod members 15 and 22 of the horizontal fluttering member 11 are arranged at intervals vertically and are fixed to each other by bolts 31 and nuts 32 with a spacer 30 interposed therebetween. The truss 17 is attached to each of the bolts 22 with bolts 33 and nuts 34. Upper rod piece 21 of the embodiment
Is made of channel steel, and small and short angle irons are welded and fixed at both ends to form wide portions 21a and 22a.
Cotter holes 21b and 22b into which the cotter 35 is driven are made in the wide portions 21a and 22a, and holes 21c and 22c through which the bolts 31 for connecting the upper and lower rod members 21 and 22 are inserted, and the truss 17 are provided in the middle portion. The holes 21d and 22d through which the bolts 33 for attaching are inserted are formed. The relative positional relationship between the upper and lower cotter holes 21b and 22b in the longitudinal direction is shown in FIG. 2B when the cotter 35 is driven with the tapered edge thereof in contact with the cotter hole edge. So that the opposite edge is vertical. The truss 17 is a rod 1
Two truss pieces 16 each having a substantially right triangle and having a right angle portion at the center of the truss 5 are symmetrically combined with each other to form a triangular truss structure in which the center of the rod 15 is a vertex as a whole. As described above, each truss piece 16 is formed in the shape of a substantially right triangle (however, one vertex as an end is chamfered) using an angle iron, and a reinforcing plate 16a is fixed by welding to the center. Each truss piece 16 has a hole 16 through which the bolt 33 for attaching to the rod piece 21 or 22 is inserted.
b, holes 16c through which bolts for integrally connecting the left and right truss pieces 16 are interposed with a central upper and lower truss connecting plate (connecting member) 25 interposed therebetween, and upper and lower truss connecting plates (connecting members) 2 on both sides
A hole 16d for passing a bolt for attaching the base 6 and a hole 16e for passing a bolt for attaching the vertex reinforcing plate 27 are provided.

The details of the second horizontal fluttering member 12 will be described with reference to FIGS. 2nd horizontal fluttering material 1
The two rods 18 are composed of two rods 41 and 42 which are arranged at an interval above and below and which are fixed to each other by bolts 31 and nuts 32 with a spacer 30 interposed therebetween in the same manner as described above. , 42 with bolts 33
It is attached with a nut 34. Upper and lower rod material pieces 41, 4
2 is a rod member of a first lateral fluttering material 11 on each side at one end on a different side using a channel steel as an intermediate portion.
A wide step portion 41 sandwiched between the upper and lower rod pieces 16 of FIG.
a, 42a, respectively, and the step portions 41a, 42a
Cotter holes 41b, 4 into which cotter 35 is driven
2b is open. Also, holes 41c and 42c for passing bolts 31 for connecting the upper and lower rod members 41 and 42 are formed in the rod members 41 and 42, and holes 41d and 42d for passing the bolts 33 for attaching the truss 20 are formed. ing. The step portions 41a and 42a are formed in a tubular shape by welding and fixing a small-sized and short angle iron, and welding and fixing a plate on the open surface side. The truss 20 is the same as the truss 17 in the first horizontal fluttering member 11, and the description thereof will not be repeated.

Next, the procedure for applying the above-described form clamp apparatus 10 will be described. At this point, the column formwork 8 and the framework scaffold 9 are already assembled. 1. Attach the right-angled right-angle holding flutter, which is not shown, to the outer surface of the four corners of the formwork 8 with hook bolts while adjusting the four sides of the formwork 8 to see the shape of the formwork 8 from above. Make the rectangle a right square. 2. A bracket 45 is attached to the assembled column formwork 8 as shown in FIGS. 3. An unillustrated steady rest member is attached to the top end of the column formwork 8. At this time, the shape of the column formwork 8 is adjusted by pushing or pulling from the surroundings. 4. The horizontal flutter members 11 and 12 are attached in the following procedure. (1) The rod piece 22 on the lower side of the rod 15 of the first horizontal fluttering material 11
On the bracket 45. (2) The lower rod member 42 of the rod 18 of the second horizontal fluttering member 12
On the bracket 45. (3) The rod piece 21 above the rod 15 of the first horizontal fluttering member 11
Is placed on the lower rod member 22 with the spacer 30 interposed therebetween. (4) The rod piece 41 above the rod 18 of the second horizontal fluttering member 12
Is put on the lower rod 42 via the spacer 30. At the time of assembling, the second horizontal fluttering material 12
As shown in FIG. 3B, each of the rod pieces 41, 42 has a stepped portion 41a, 42a at one end thereof between the upper and lower rod pieces 21, 22 of the first horizontal fluttering material 11. State. Further, the spacer 30 includes one of the rods,
For example, it may be fixed to the lower rod 42 by welding in advance. (5) The upper and lower rod members 21 and 22 of the first horizontal fluttering member 11 are tightened by bolts 31 and nuts 32 to be integrally connected. The upper and lower rod members 41 and 42 of the second horizontal fluttering member 12 are fastened together by bolts 31 and nuts 32 at the spacer 30 portion, and tightened together by bolts 31 and nuts at the step portions 41a and 42a. (6) The cotter 35 is inserted into the cotter holes 21b, 22b and 41b, 42b at both ends of the rods 15, 18 of the first horizontal flutter 11 and the second horizontal flutter 12, respectively.
Temporarily fix both ends of 5,18. 5. The trusses 15 and 18 are attached to the respective lateral flutter members 11 and 12 in the following procedure. (1) Upper and lower rod pieces 2 of the rod 15 of the first horizontal fluttering material 11
The truss 17 is fastened and fixed to each of the truss pieces 17 and the bolts 33 and nuts 34 for each truss piece 16. (2) The left and right truss pieces 16 in the upper and lower trusses 17 are respectively bolted and fixed to each other with the upper and lower portions of the central upper and lower truss connection plates 25 interposed therebetween, and thus the upper and lower trusses 17 are connected by the upper and lower truss connection plates 25. . Also,
The upper and lower trusses 17 are also connected by the upper and lower truss connection plates 26 even at the intermediate positions of the truss pieces 16. Further, a vertex reinforcing plate 27 is attached to the vertex with bolts to reinforce the vertex. (3) Each horizontal fluttering material 11 is attached to the column form 8 by using a pull-in fitting including a hook bolt 46, a washer 47, and a nut 48.
Attract 12 6. By strongly driving the cotter 35, the mutual connection of the horizontal flutter members 11 and 12 at the four corners of the form clamp device 10 is firmly connected. With the above, the work of fastening and fixing the column formwork 8 by the formwork clamp device 10 is completed.

The above operation is performed in a narrow space between the column formwork 8 and the framed scaffold 9, but as described above, each of the horizontal fluttering members 11 and 12 is made up of the rod members 15 and 18 and the trusses 17 and 2
Since it can be separated into 0 and carried in, it is easy to carry in. Further, since the trusses 17 and 20 are each divided into two truss pieces 16 and 19, the size is further reduced and the carry-in is easy. In addition, if the horizontal flaps consist only of simple rods as in the prior art, it is necessary to increase the cross section of the rods in order to provide high strength.
Although the weight increases, the present invention has a structure in which the trusses 17 and 20 are combined with the rods 15 and 18, so that it is easy to secure sufficient strength without increasing the weight.

Thereafter, the column form 8 and the concrete independent columns 7
Concrete is put between them and they are cured.
After curing, the form clamp device 10 is disassembled. The procedure in this case is generally the reverse of the procedure at the time of assembly. The dismantled member can be used repeatedly.

In the above embodiment, the rods 15, 18
Although a channel steel is used as the material of the above, a member having an arbitrary cross-sectional shape can be used without being limited to this. In the embodiment, the rod 15 of the first horizontal flutter 11 and the rod 18 of the second horizontal flutter 12 are both upper and lower rods 21, 22 or 41, 42. Butter wood 12
The rod 18 on the side may be composed of one rod, and the first horizontal fluttering material 11 may also be structured so that both ends sandwich the end on the second horizontal fluttering material 12 side. It may be one. In this case, the number of trusses is also one. Also,
Each of the trusses 17 and 20 of the embodiment is divided into two truss pieces 16 and 19 on the left and right sides, but may be an integral structure instead of a split type. In the case of a divided structure, for example, the structure may be divided into three parts, that is, a center part and a left and right part, or may be further divided into four or more parts.

[0016]

According to the form clamping device of the present invention, each lateral flap has a structure having a truss as well as a simple rod, so that even when applied to a large column form, it does not increase the weight. , It is possible to secure sufficient strength.
Also, since the truss is not detached from the rod but is fixed to the rod so that it can be attached and detached, all the individual members that make up the horizontal fluttering material are light in weight, and the work of installing the form clamp device is easy. , Workability is improved. In addition, since the horizontal fluttering material is divided into multiple members, each member is small in size, for example, it must be installed in a narrow space between the existing concrete independent column and the surrounding scaffolding scaffold Even in such a case, each member can be easily carried in,
Also in this respect, workability is improved. Further, when the truss has a divided structure, the individual members can be lighter.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a form clamp device according to an embodiment of the present invention.

2A is a detailed enlarged view of the vicinity of a lower first rod in FIG. 1, and FIG. 2B is a front view of FIG.

3A is a detailed enlarged view of the vicinity of a left second rod in FIG. 1, and FIG. 3B is a front view of FIG.

FIG. 4 is a perspective view for explaining a situation in which the form clamp device is installed.

FIG. 5 is an enlarged view of a horizontal fluttering material receiving portion attached to the formwork side in FIG. 4;

FIG. 6 is an exploded perspective view of a first horizontal flutter material in the form clamp device.

FIG. 7 is an exploded perspective view of a second horizontal flutter member in the form clamp device.

FIG. 8 is a plan view of a conventional mold clamping device.

9 is a perspective view of a main part in FIG.

[Explanation of symbols]

 8 pillar formwork 10 formwork clamp device 11 1st horizontal fluttering material 12 2nd horizontal fluttering material 15,18 rod material 16,19 truss piece 17,20 truss 21,22,41,42 rod material piece 41a, 42a step 25,26 Vertical truss connecting plate (connecting member) 35 cotters

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Teiichi Soyama 3-10-7 Iwamotocho, Chiyoda-ku, Tokyo Inside Nikken Metal Co., Ltd. (72) Inventor Masayoshi Yonezawa 3-10-7, Iwamotocho, Chiyoda-ku, Tokyo Inside Nikken Metal Co., Ltd.

Claims (4)

[Claims] 1. A concrete independent column for fastening horizontal column members to horizontal sides of a rectangular column-shaped column form by applying horizontal flaps to the four outer surfaces thereof, connecting ends of adjacent horizontal flaps to each other, and tightening and fixing the column form. In the form clamp device of the above,
A form clamp for an independent concrete column, comprising: a rod material applied to an outer surface of a column formwork; and a truss detachably fixed to an outer surface of the rod form to form a truss structure in a horizontal plane. apparatus. 2. Each of the rod members in the four horizontal flutter members, that is, the first horizontal flutter material on two opposing sides of the column formwork and the second horizontal flutter material on two sides opposing in a direction orthogonal thereto. The two upper and lower rod members, which are composed of two rod members which are vertically joined at an interval, constitute the rod member of the second horizontal fluttering member. A step portion sandwiched between upper and lower rod pieces of the horizontal fluttering rod material;
The truss is detachably fixed to the upper and lower rod pieces of the horizontal flutter rod and the upper and lower rod pieces of the second horizontal flutter rod, and the upper and lower trusses are connected by connecting members. The form clamping apparatus for a concrete independent column according to claim 1, wherein: 3. The apparatus according to claim 1, wherein the truss comprises a plurality of detachable truss pieces divided in a longitudinal direction of a horizontal fluttering material. 4. The truss structure is a triangular truss structure in which two substantially right-angled triangular truss pieces each having a right-angled portion at the center of the rod are symmetrically combined to form a vertex at the center of the rod as a whole. The form clamping apparatus for a concrete independent column according to claim 3, wherein: