Permanent formwork mounting bracket and method to fix permanent formwork to concrete structure therewith

Abstract

To provide a permanent formwork mounting bracket and a method to fix the permanent formwork to a concrete structure using it, with which a permanent can be easily fixed to any shape of concrete structure without requiring post-construction work on the concrete structure itself.SOLUTION: A metal bracket for fixing a permanent formwork to a concrete structure is disclosed. The metal bracket of the present invention includes a base body that has a flat bottom surface and a tongue-shaped rib that extends downward from a part of the bottom surface, a formwork fixing plate that is erected at one end of the base body and can mount the permanent formwork, and a rib that extends in the length direction of the base body and has a pointed portion that can press against the back surface of the concrete structure. Here, the tongue-shaped rib and the pointed portion are arranged in pairs so as to be able to clamp the concrete structure.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a residual formwork mounting fitting and a method for fixing a residual formwork to a concrete structure using the same.

Background Art

[0002] In construction work, in construction and earthwork, etc., residual formworks made of concrete may be used instead of general wooden formworks. For example, with respect to the ground surface. When constructing an embankment in the vertical direction or an inclined direction, the reinforced soil wall method is known as one of the retaining walls for retaining soil.

[0003] In the reinforced soil wall method, as the finish of the top end portion of the uppermost stage, coping concrete work (prepared concrete work) is used. Generally, wooden formworks are arranged on the front and rear surfaces of the top end block to form a frame in an arbitrary shape, and concrete is placed for height adjustment.

[0004] Here, in a part of this formwork work, a residual formwork work using a precast concrete panel (also referred to as a residual formwork) may be adopted. The main merits of this method include cases where it is adopted for reasons such as the construction period can be shortened, the formwork removal work can be omitted, and the shortage of workers can be compensated.

[0005] However, when performing the residual formwork work, depending on the specifications of the underlying concrete structure (concrete secondary product), etc., at each site, (a) The mounting method varies depending on the shape of the concrete structure; (b) Mounting may be performed using "post-construction anchors" etc. that may damage the structure body; (c) Depending on the situation, operations such as welding are performed on the main reinforcement, which may cause a cross-sectional defect of the reinforcement; (d) The work content is largely at the discretion of each site, and the construction quality is likely to vary. In some cases, concrete mill leakage may occur from the joints; Such problems have been pointed out.

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention solves the above problems, and its object is to easily fix a remaining formwork without requiring a process that damages the concrete body such as a post-construction anchor to the concrete body itself. An object of the present invention is to provide a remaining formwork attachment fitting and a method for fixing a remaining formwork to a concrete body.

Means for Solving the Problems

[0007] The present invention is a fitting for fixing a remaining formwork to a concrete body, a base body having a flat bottom surface and a tongue-shaped rib extending downward from a part of the bottom surface; a formwork fixing plate erected at one end of the base body and capable of attaching the remaining formwork; a rib extending in the length direction of the base body and having a blade tip portion capable of pressing the back surface portion of the concrete body; comprising a fitting in which the tongue-shaped rib and the blade tip portion are arranged to sandwich the concrete body.

[0008] In one embodiment, the clamping of the concrete body by the tongue-shaped rib and the blade tip portion is performed between a construction lifting fitting provided on the concrete body and the back surface portion of the concrete body.

[0009] In one embodiment, the tongue-shaped rib extends downward and obliquely from one end of the base body toward the other end.

[0010] In one embodiment, the rib is composed of a single member continuously extending along the length direction of the base body, and the blade tip portion is a blade tip bolt screwed into a fixing nut attached to the rib.

[0011] In one embodiment, a second rib extending along the length direction of the base body is provided.

[0012] The present invention also relates to a method for fixing a remaining formwork to a concrete body, comprising: a step of sandwiching the concrete body by using the metal fitting such that the tongue-shaped rib and the sword tip portion constituting the metal fitting are paired; and a step of attaching the remaining formwork to a formwork fixing plate constituting the metal fitting. This is a method including these steps.

Advantages of the Invention

[0013] According to the present invention, various remaining formworks can be easily installed on various concrete bodies without damaging the underlying concrete body. Further, during the fixing of the remaining formwork, uniform construction is possible, and it is possible to improve the construction quality and shorten the construction period.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Best Mode for Carrying Out the Invention

[0015] The present invention will be described with reference to the accompanying drawings. In all the following drawings, components with the same reference numerals are the same as those shown in other drawings.

[0016] (Residual form mounting fitting) FIG. 1 is a perspective view of a residual form mounting fitting (hereinafter, sometimes simply referred to as a “fitting”) of the present invention, which illustrates an example of the fitting.

[0017] The fitting 100 of the present invention includes a base body 120, a form fixing plate 140, and ribs 160.

[0018] The base body 120 has, for example, an elongated shape. The base body 120 also has a bottom surface 122 and a tongue-shaped rib 124 extending downward from a part of the bottom surface 122.

[0019] FIG. 2 is a side view of the residual form mounting fitting 100 of the present invention shown in FIG. 1.

[0020] The bottom surface 122 of the fitting 100 is composed of, for example, a substantially flat surface. The bottom surface 122 is a part that contacts the upper end of a concrete structure (not shown) when the fitting 100 is fixed to the concrete structure. Therefore, the bottom surface 122 may be processed to conform to the shape of the upper end of the concrete structure to be fixed.

[0021] The tongue-shaped rib 124 is a member that can engage with a lifting tool for constructing a concrete structure, and is designed, for example, by bending a part of the base body 120 to extend downward from a part of the bottom surface 122. In FIG. 2, the tongue-shaped rib 124 is preferably connected on one end 160 side of the base body 120 and extends downward and obliquely from one end 128 to the other end 130 of the base body 120.

[0022] The inclination angle θ1 of the tongue-shaped rib 124 shown in Fig. 2 (the angle formed between the bottom surface 122 of the base body 120 and the upper surface of the tongue-shaped rib 124) is, for example, 10° to 45°, or 20° to 30°. When the inclination angle θ1 of the tongue-shaped rib 124 is less than 10°, it cannot be sufficiently engaged with the construction sling provided on the concrete body during the fixation to the concrete body, and as a result, it may be difficult to firmly clamp the concrete body between the tongue-shaped rib and the sword tip portion described later.

[0023] Fig. 3 is a top view of the remaining formwork mounting fitting 100 of the present invention shown in Fig. 1.

[0024] Preferably, a notch 132 having a semi-circular shape, for example, is provided at the tip of the tongue-shaped rib 124. The notch 132 is designed to have a size capable of accommodating the construction sling provided on the concrete body described later. An example of the notch 132 accommodating the construction sling provided on the concrete body will be described in more detail with reference to Fig. 4.

[0025] Fig. 4 is an enlarged view of the tongue-shaped rib constituting the remaining formwork mounting fitting of the present invention.

[0026] Here, the tongue-shaped rib 124 shown in Fig. 4(a) corresponds to the one provided on the fitting 100 of the present invention shown in Figs. 1 to 3 above. As shown in Fig. 4(a), the tongue-shaped rib 124 extends from a part (the left side in Fig. 4(a)) of the hole 134 provided in a part of the base body 120. The notch 132 provided at the end of the tongue-shaped rib 124 is slightly larger than the diameter of the shaft portion 182 of the construction suspension fitting 180 (for example, a D-hook anchor) arranged at the upper end of the concrete body, and is designed to engage with the head portion 184 of the construction suspension fitting 180. The shape of the notch 132 is not particularly limited as long as it can accommodate the shaft portion 182 of the construction suspension fitting 180 of the concrete body and engage with the head portion 184 of the said construction suspension fitting 180, and it may have other shapes. Since the end of the tongue-shaped rib 124 has such a shape of the notch 132, the fitting 100 of the present invention can firmly hold the concrete body with the tongue-shaped rib 124 paired with the sword tip portion described later.

[0027] In addition, in the fitting of the present invention, the tongue-shaped rib may have a structure as shown in Fig. 4(b). Fig. 4(b) is an enlarged view showing an example of another tongue-shaped rib that can constitute the remaining form mounting fitting of the present invention.

[0028] In Fig. 4(b), the tongue-shaped rib 124' extends from a part (the right side in Fig. 4(b)) of the hole 134' provided in a part of the base body 120. The tongue-shaped rib 124' has a U-shaped form with a second hole 136 provided in the central part, and can engage with the construction suspension 180 of the concrete body through this second hole 136. Specifically, the second hole 136 is larger than the head portion 184 of the construction suspension 180, and the head portion 184 can pass through the inside thereof. The inner side 135 of the U-shaped tongue-shaped rib 124' can be in contact with the shaft portion 182 of the construction suspension 180, and thus, by pressing from the right side in Fig. 4(b) (specifically, pressing through the sword tip portion described later), the tongue-shaped rib 124' and the sword tip portion can be paired to firmly hold the concrete body.

[0029] Referring back to FIG. 1, a pin 138 may be provided on a part of the upper surface of the base body 120. In FIG. 1, the pin 138 is provided along a direction substantially perpendicular to the upper surface of the base body 120, but is not particularly limited to such an arrangement.

[0030] The pin 138 is a member to which the other end of a separator material having one end attached to the back surface of a remaining formwork described later is fixed (for example, welded). The pin 138 has an arbitrary shape such as a cylinder, a cylinder, a prism, or a square tube, and its length is not particularly limited, but it is preferable to adopt a length such that its upper end is higher than the upper end of a rib 160 described later. This is to prevent the above-mentioned other end of the separator material from buffering against the upper end of the rib 160. On the other hand, in the present invention, when there is no buffering with the rib 160, instead of providing the pin 138, the above-mentioned other end of the separator material may be directly welded to the upper surface of the base body 120.

[0031] In the fitting 100 shown in FIG. 1, the formwork fixing plate 140 is erected at one end 128 of the base body 120. The formwork fixing plate 140 preferably has a support surface 142 that supports the remaining formwork from its back surface, and a formwork bolt hole 144 through which a fixing bolt passes is provided at the center.

[0032] The support surface 142 has, for example, a substantially flat surface and is designed to be in close contact with the back surface of the remaining formwork. Also, the size of the formwork bolt hole 144 is not particularly limited, and any diameter can be selected by those skilled in the art according to the size of the remaining formwork to be adopted, etc.

[0033] In the embodiments shown in FIGS. 1 to 3, the support surface 142 is provided in a direction substantially perpendicular to the base body 120 (the upper surface or the bottom surface 122 thereof), but the present invention is not limited to such an arrangement. When the remaining formwork fixed to the concrete structure is arranged in a direction other than the vertical direction (for example, inclined at a predetermined angle) with the horizontal direction in order, the formwork fixing plate 140 and its support surface 142 may be inclined at an arbitrary angle according to the inclination angle.

[0034] In the fitting 100 of the present invention shown in FIG. 1, the rib 160 extends along the length direction of the base body 120, and is preferably provided along the length direction substantially perpendicular to the base body 120 (the upper surface or the bottom surface 122 thereof) and at substantially the center in the width direction of the base body 120. By having such a form of the rib 160, the strength in the plane direction of the base body 120 can be increased, and a stronger fixation can be realized.

[0035] The rib 160 also extends downward, for example, on the side of the other end 130 of the base body 120, and a sword tip portion 162 is provided at its end. In FIG. 1, the sword tip portion 162 is composed of a fixing nut 164 and a sword tip bolt 166 screwed into the fixing nut 164. Here, the tip portion 166a of the sword tip bolt 166 is directed toward the side where the tongue-shaped rib 124 is disposed.

[0036] In the fitting 100 of the present invention shown in FIG. 1, the sword tip portion 162 may be provided so as to be substantially parallel to the bottom surface 122 of the base body 120, or may be provided on the rib 160 so as to incline at a slight angle (for example, 5° to 20°) above the plane direction of the bottom surface 122 of the base body 120. By arranging the sword tip portion 162 to incline upward at the slight angle, when the tongue-shaped rib 124 and the sword tip portion 162 are clamped to the concrete body, the sword tip portion 162 can strongly and surely press the upper surface portion and the back surface portion of the concrete body, and prevent the base body 120 from lifting from the concrete body when the sword tip portion 162 is tightened, and the clamping can be made stronger.

[0037] The fitting 100 of the present invention may also be provided with a second rib 170 extending along the length direction of the base body 120. The second rib 170 preferably extends continuously along the length direction of the base body 120 and is preferably arranged substantially parallel to the rib 160.

[0038] The second rib 170 has a role of assisting the rib 160, and specifically, it is provided to further enhance the strength in the planar direction of the base body 120. In the fitting 100 shown in FIG. 1, the height of the second rib 170 extending from the base body 120 may be suppressed to be lower than, for example, the height of the rib 160.

[0039] In the present invention, the base body 120 (including the tongue-shaped rib 124), the formwork fixing plate 140, the rib 160, the sword tip portion 162, the second rib 170, and the pin 138 are all preferably made of a hard material (for example, a steel plate, stainless steel, aluminum, or other lightweight alloy). Further, the tongue-shaped rib 124, the formwork fixing plate 140, the rib 160, and the second rib 170 may be attached to the base body 120 by welding respectively, or the base body 120, the tongue-shaped rib 124, the formwork fixing plate 140, the rib 160, and the second rib 170 may be formed by bending a single plate. In addition, in order to fix the remaining formwork as described later and have sufficient strength to withstand its weight, for example, a medium plate or thick plate steel plate (preferably a steel plate having a thickness of 3 mm or more, more preferably 6 mm or more, and even more preferably 9 mm or more) may be used.

[0040] (Method for fixing the remaining formwork to the concrete structure) Using the remaining formwork attachment fitting of the present invention, the remaining formwork can be fixed to the concrete structure, for example, as follows. This method (hereinafter sometimes referred to as the fixing method of the present invention) will be described.

[0041] FIG. 5 is a partially cut-away cross-sectional view schematically illustrating a state in which the concrete structure and the remaining formwork are fixed using the remaining formwork attachment fitting of the present invention shown in FIG. 1.

[0042] In the fixing method of the present invention, first, using the remaining formwork attachment fitting 100, the tongue-shaped rib 124 and the sword tip portion 162 constituting the fitting 100 are paired to sandwich the concrete structure 188.

[0043] Specifically, first, the operator checks whether there are any irregularities on the upper end of the precast concrete body 188. If there are irregularities, finishing is performed using polishing means such as a grinder so as to be substantially smooth. Also, it is preferable to attach curing tape, butyl tape, etc. to the joints around the concrete body 188 so that there is no leakage of concrete mill from the gaps of the joints.

[0044] In this state, the tongue-shaped rib 124 of the remaining formwork mounting fitting 100 shown in FIG. 1 is engaged with the construction hoisting tool 180 (the hoisting tool 180 is a metal fitting embedded in a hemispherical recess 190, for example, at the upper end of the concrete body 188, and is generally used for hoisting when the concrete body 188 is relocated) provided in advance at the upper end of the concrete body 188. At that time, it is preferable for the operator to check for looseness between the engaged fitting 100 and the concrete body 188.

[0045] After confirming that the tongue-shaped rib 124 of the remaining formwork mounting fitting 100 is securely engaged with the head 184 of the construction hoisting tool 180 (and the tongue-shaped rib 124 and the head 184 of the construction hoisting tool 180 are welded if necessary), the sword tip bolt 166 of the sword tip portion 162 arranged behind the rib 160 constituting the fitting 100 is tightened until the tip end portion 166a of the sword tip bolt 166 is buried in the back surface 192 of the concrete body 188.

[0046] Thereby, the concrete body 188 is firmly clamped by the tongue-shaped rib 124 and the sword tip portion 162 constituting the remaining formwork mounting fitting 100.

[0047] In the fixing method of the present invention, next, the remaining formwork 186 is attached to the formwork fixing plate 140 constituting the remaining formwork mounting fitting 100.

[0048] Specifically, a remaining form 186 is disposed on the front surface of a form fixing plate 140 of the remaining form mounting fitting 100, and the remaining form 186 is temporarily fixed by passing a bolt 194a from the back surface of the form fixing plate 140 toward the remaining form 186. Further, temporary fixing of another remaining form (not shown) adjacent to the remaining form 186 is similarly performed, and it is confirmed by an operator that there is no inappropriate gap between the adjacent remaining forms. After this confirmation, the tightening operation of the bolt 194a is performed.

[0049] In the present invention, in order to more firmly attach the remaining form 186 to the remaining form mounting fitting 100, it is preferable to fix the space between the remaining form mounting fitting 100 and the remaining form 186 with a separator 196.

[0050] The separator 196 is composed of a material known in the art. The lower end of the separator 196 is fixed, for example, by welding to the upper end of a pin 138 of the remaining form mounting fitting 100. On the other hand, the upper end of the separator 196 is fixed by welding to the end of a bolt 194b screwed into the back surface of the remaining form 186.

[0051] Thereby, the remaining form 186 is firmly attached to the remaining form mounting fitting 100 of the present invention, and as a result, the remaining form 186 can be firmly fixed to the concrete body 188.

[0052] After fixing the remaining form 186 to the concrete body 188, for example, a wooden form (not shown) extending from the rear of the concrete body 188 to the rear of the remaining form 186 is disposed, and concrete mix is placed in the space portion behind the wooden form and the remaining form 186. At that time, the remaining form mounting fitting 100 and the separator 196 of the present invention are also embedded in the placed concrete mix.

[0053] In this way, the finish of the uppermost top end portion is performed.

[0054] (Other embodiments) FIG. 6 is a partial cut-away sectional view schematically illustrating a state in which a concrete body and a formwork are fixed using another formwork mounting fitting of the present invention.

[0055] The formwork mounting fitting 200 of the present invention is configured such that a base body 220 is separated into two parts, namely, a first base body 220a and a second base body 220b.

[0056] The first base body 220a is provided with a front rib 260a extending substantially perpendicularly from the first base body 220a, and a connecting nut portion 261 is attached to the front rib 220a. On the other hand, the second base body 220b is provided with a rear rib 260b extending substantially perpendicularly from the second base body 220b, and a connecting plate 264 provided with a bolt hole (not shown) is provided on the rear rib 260b.

[0057] Furthermore, a connecting bolt 266 capable of connecting the connecting nut portion 261 of the front rib 260a and the connecting plate 264 of the rear rib 260b to each other is disposed in the formwork mounting fitting 200 of the present invention. Here, the connecting bolt 266 is disposed from the side of the connecting plate 264 of the rear rib 260b toward the side of the connecting nut portion 261 of the front rib 260a, and the gap between the front rib 260a and the rear rib 260b can be adjusted by screwing the connecting bolt 266.

[0058] On the other hand, a pressing plate 270 extending in the vertical direction is provided behind the rear rib 260b, and a protruding sword tip portion 262 that faces and protrudes from the back surface 192 of the concrete body 188 is provided at an end of the pressing plate 270.

[0059] In this state, the tongue-shaped rib 124 of the remaining formwork mounting fitting 200 is engaged with the construction sling 180 disposed in the recess 190 at the upper end of the concrete body 188, and then the connecting bolt 266 for connecting the front rib 260a and the rear rib 260b constituting the fitting 200 is screwed in. As a result, the gap between the front rib 260a and the rear rib 260b gradually narrows. Consequently, the sword tip portion 262 provided on the pressing plate 270 of the rear rib 260b presses the back surface 192 of the concrete body 188, and the concrete body 188 is firmly clamped by the tongue-shaped rib 124 and the sword tip portion 262 constituting the remaining formwork mounting fitting 200.

[0060] Thereafter, in the same manner as the fixing method of the present invention using FIG. 5, the remaining formwork 186 is attached to the remaining formwork mounting fitting 200, and further, the back surface of the remaining formwork 186 and the pin 238 constituting the remaining formwork mounting fitting 200 can be fixed by welding with a separating material.

[0061] After fixing the remaining formwork 186 to the concrete body 188, the concrete mix is placed in the same manner as described above, and the finish of the top end portion at the uppermost stage of the concrete body 188 is performed.

[0062] Thus, the remaining formwork mounting fitting of the present invention is useful at a work site for forming a retaining wall using a reinforced earth wall method, large blocks, or the like.

Explanation of Reference Numerals

[0063] 100, 200 Remaining formwork mounting fitting 120, 220 Base body 122 Bottom surface 124, 124’ Tongue-shaped rib 132 Notch 134, 134’ Hole 136 Second hole 138 Pin 140 Formwork fixing plate 142 Support surface 144 Formwork bolt hole 160 Rib 162,262 Blade tip part 164 Fixing nut 166 Blade bolt 166a Tip part 170 Second rib 180 Construction hanger 182 Shaft part 184 Head part 186 Remaining form 188 Concrete body 190 Concave part 192 Back surface 194a, 194b Bolts 196 Separation material 220a First base body 220b Second base body 260a Front rib 260b Rear rib 261 Connecting nut part 264 Connecting plate 266 Connecting bolt 270 Pressing plate

Claims

1. A fitting for fixing a remaining formwork to a concrete body, having a base body with a flat bottom surface and a tongue-shaped rib extending downward from a part of the bottom surface; a formwork fixing plate erected at one end of the base body and capable of attaching the remaining formwork; a rib extending in the length direction of the base body and having a sword tip portion capable of pressing the back surface portion of the concrete body; comprising a fitting in which the tongue-shaped rib and the sword tip portion are paired and arranged so as to sandwich the concrete body.

2. The fitting according to claim 1, wherein the sandwiching of the concrete body by the tongue-shaped rib and the sword tip portion is performed between a construction hanger provided on the concrete body and the back surface portion of the concrete body.

3. The fitting according to claim 1, wherein the tongue-shaped rib extends downward and obliquely from one end of the base body toward the other end.

4. The fitting according to claim 1, wherein the rib is composed of one member continuously extending along the length direction of the base body, and the sword tip portion is a sword tip bolt screwed into a fixing nut attached to the rib.

5. The fitting according to claim 4, wherein the tip end portion of the sword tip bolt is arranged to be inclined upward with respect to the length direction of the base body.

6. The fitting according to claim 1, wherein a second rib extending along the length direction of the base body is provided.

7. A method for fixing a remaining formwork to a concrete body, using the fitting according to any one of claims 1 to 6, and a step of sandwiching the concrete body with the tongue-shaped rib and the sword tip portion constituting the fitting being paired, and The step of attaching a remaining formwork to a formwork fixing plate constituting the metal fitting, A method including this.

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