JPH11280257A - Washer for clamping concrete form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To firmly retain the shape of a form without loosening a batter angle by enabling a wedge to be strongly driven in while preventing the deviation of a stopper. SOLUTION: A stopper 6 at the end of a second-step holding surface 2 is provided by cutting a cutting line 17 in an in-plane position at a predetermined width from the end edge 16a of the second-step holding surface, and by extrusion molding its end from the cutting line 17 toward the two-stepped holding surface 2. A through hole 3 to be provided in a first-step holding surface 1 is bored in approximately the longitudinal center of the first-step holding surface 1, and a through hole 4 to be provided in the second-step holding surface 2 is bored in such a way that a parallel surface part 7 of the same height as the back 2a of the second-step holding surface is provided between the edge 18 of the through hole 4 and the first-step holding surface side terminal end 14 of the second-step holding surface 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wedge having a one-step pressing surface and a two-step pressing surface facing a flap angle along a one-step or two-step pile on a concrete formwork with a leg opened at a predetermined angle. With regard to a washer for concrete formwork tightening and fixing using, especially when a wedge is firmly driven in, a stopper is not displaced and a formwork can be firmly maintained without loosening a flutter angle. The present invention relates to a washer for fastening a concrete formwork.

[0002]

2. Description of the Related Art Conventionally, since a large number of washers for tightening a concrete form of this type are used at a time, a flap angle can be set only by driving a wedge so that the washer can be quickly set even in a site where working conditions are poor. It is provided so that it can be fixed. FIG. 8 is a cross-sectional view showing a conventional washer 100 for fastening a concrete formwork. In the figure, reference numeral 101 denotes a one-step flutter angle 11 along the outer surface of a concrete formwork 111a.
2a is a one-stage pressing surface formed so as to be able to face two pieces, and 102 is a two-step pressing face formed so as to be able to face one of the upper steps of a flap angle 112b along a two-step overlap (indicated by a chain line in the drawing). It is a step holding surface, and both holding surfaces 101 and 102 are provided by bending a steel plate material in a state where the leg is opened at a predetermined angle Q. In the figure, reference numeral 104 denotes the bending point. Since such a concrete mold clamping washer is subjected to a bending action, the first-stage pressing surface 101 and the second-stage pressing surface 102 are formed such that side edges are bent to have a substantially U-shaped cross section. Reinforcing ribs 103 are provided upright on both side edges, and the reinforcing ribs 103 are also bent in the vertical direction at the bending points (for example, Utility Model Registration No. 30175).
No. 59).

An extension shaft with a wedge set hole protruding from a concrete formwork (111a for one stage, 111b for two stages) is provided on each of the pressing surfaces 101, 102 (same as 114a, two stages for one stage). In the case 114b), it is provided so as to have the insertion holes 105 and 106 and to have stoppers 107 and 108 at the ends of the pressing surfaces to prevent the flutter angle from coming off. The insertion holes 105 and 106
Is an extension shaft 1 with a wedge set hole even if there is some displacement.
Each of the insertion holes 10a and 114b is formed in a long hole shape that is full of the width of the holding surface so that the insertion holes 10a and 114b can be quickly inserted.
5 is located substantially at the center of the one-stage pressing surface 101 and the insertion hole 106
Are arranged so that the edge of the hole coincides with the bending point 104.

The stoppers 107 and 108 are provided on both sides of the concrete form clamping washer 100, that is, the outer ends of the first-stage pressing surface 101 and the second-stage pressing surface 102, together with the reinforcing ribs 103, on the pressing surface side. It is formed by bending. In the figure, 109 and 110 are the bending points. As described above, the washer 100 for tightening the concrete form having the first-stage pressing surface 101 and the second-stage pressing surface 102 has one pressing surface facing the flutter angle and the other pressing surface during use is shown in FIG. As shown, the leg opening angle Q and the respective lengths are limited so as to be in a state of being pressed against the form panel. The extension shafts 114a and 114b with the wedge set holes are connected to the separator 117 in the mold.
A female screw portion 115 is provided at one end of the shaft for screwing with a shaft foot bolt 118 protruding from the outer surface of the formwork and having a long set hole 116 through which a wedge 119 is inserted. And sold as FormTie (trade name).

[0005]

As described above, the washer 100 for tightening the concrete formwork having the one-stage holding surface 101 and the two-stage holding surface 102 can exhibit the same performance in the single-stage holding state and the two-stage holding state. In order to limit the opening angle and the length of each leg as described above, the place (width) where the stopper is provided is naturally limited. In particular, the stopper 108 on the two-stage pressing surface side is very inward, about 5 mm inward from the end of the pressing surface. I can only get a narrow width. However, since the conventional stopper portion is formed by bending the pressing surface 102 together with the reinforcing rib 103 in the pressing surface direction, the stopper portion almost ends only at the curved portion. The sharp bends that can be made are not obtained. FIG. 9 shows a state in which the two-tiered butter angle is fixed by the washer 100 for fastening the concrete formwork, and the butter angle 112b extends along the two-tiered stacking. By the way, in order to fix the flap angle 112b, an extension shaft 114b with a wedge set hole protruding from the upper flap angle 112b is inserted into the insertion hole 106, and a long hole protruding from the back side of the two-stage pressing surface 102. The wedge 119 is inserted into the 116 from above, and the wedge 119 is driven downward with a hammer or the like, thereby narrowing and fixing the space between the mold frame 111b and the two-stage pressing surface 102. Accordingly, when driving the wedge 119 with the hammer, the wedge 119 is driven.
Presses the extension shaft 114b with a wedge setting hole downward, and presses the washer 100 for tightening the concrete formwork downward because the extension shaft 114b with the wedge setting hole easily bends easily downward. 108 is the flutter angle 1
There was a problem in that it slipped off the corner of 12b.

When driving the wedge 119 with the hammer, as shown in FIG.
That is, the wedge 11 is formed at both edges 106a and 106b of the insertion hole 106.
9 are evenly received, and finally the long side 119a of the wedge 119 presses the long back surface 102a of the two-stage pressing surface to narrow the gap.
Since the 6b side is located at the bending point 104 and receives the wedge 119 at the corner, the corner is displaced for each use, and the wedge 119 floats from the back surface 102a, and as a result, As described above, there is also a problem that the stopper 108 is lifted up and the stopper 108 slips off the flap angle 112b.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a one-step pressing surface which faces a concrete form along a one-step or two-step flap angle. And the two-step holding surface are opened at a predetermined angle, so that the wedge can be firmly driven without the stopper coming off, and the formwork can be firmly held without loosening the flutter angle. An object of the present invention is to provide a washer for clamping a concrete formwork, which can be shaped.

[0008]

According to a first aspect of the present invention, there is provided a washer for tightening a concrete form according to the present invention, wherein two parallel butter angles are provided along the outer surface of the assembled concrete form. A single-stage presser surface that can be mated, and a two-stage presser surface that can be mated to an upper stage of a flutter angle along a two-stage stack are in a state where the legs are opened at a predetermined angle, and each of the presser surfaces has concrete. In the washer for tightening a concrete form having a through hole of an extension shaft with a wedge set hole protruding from the form and having a stopper at each end of the pressing surface to prevent the flutter angle from coming off, The stopper provided at the end of the holding surface is provided by forming a cutting line at a position within a plane having a predetermined width from the edge of the two-stage holding surface, and extruding the end from the cutting line toward the two-stage holding surface. Configuration.

According to a second aspect of the present invention, there is provided a washer for fastening a concrete formwork, comprising: a one-step pressing surface which can face two parallel butter angles along a step on an outer surface of the assembled concrete form;
A wedge set hole protruding from a concrete form is provided on each of the holding surfaces, with a two-stage holding surface capable of being faced to one upper stage of a flutter angle along the two-stage stack being opened at a predetermined angle. In the washer for tightening a concrete formwork having a through hole for an extension shaft with a hole and having a stopper at each end of the pressing surface to prevent the flutter angle from coming off, the through hole provided in the one-stage pressing surface is the one-stage pressing hole. An insertion hole formed in a substantially central portion in the longitudinal direction of the holding surface and provided in the two-stage holding surface is provided with a two-stage holding member between an edge of the insertion hole and the first-stage holding surface side end of the two-stage holding surface. It was constructed so as to have a parallel surface part at the same height as the rear surface.

[0010]

In the washer for fastening the concrete formwork according to the first aspect, a cutting line is formed at the end of the two-stage pressing surface, and the end is extruded from the cutting line to form the stopper. On the contacting side, the cutting line side suddenly protrudes from the pressing surface, so that a curved portion is not formed. Therefore, the stopper can fit exactly in the flutter angle, so that it is impossible to ride on the stopper. Therefore, even if the wedge is firmly driven, the stopper does not shift, so that the form can be firmly maintained without loosening the flutter angle.

In the washer for tightening the concrete formwork according to the second aspect, both sides of the insertion hole on the back side of the two-stage pressing surface are parallel to the back of the two-stage pressing surface and the same height as the back of the two-stage pressing surface. When the wedge is driven into the extension shaft with a wedge set hole protruding from the insertion hole, since the wedge is received by the parallel surfaces on both sides of the insertion hole, the surface pressure decreases. The corner of the edge of the insertion hole does not slack. For this reason, even if the wedge is firmly driven, the stopper side does not rise, and the form can be firmly maintained without loosening the flutter angle.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a cross-sectional view showing a washer for fastening a concrete formwork according to an embodiment of the present invention, FIG. 2 is a front view of the same, FIG. 3 is a plan view of the same, FIG. 4 is a bottom view of the same, and FIG. FIG. 6 is a sectional view taken along line aa, FIG. 6 is an explanatory view showing a use state in which a single-stage flap angle is fixed, and FIG. 7 is an explanatory view showing a use state in which a two-step flap angle is fixed. 2 to 4, illustrations of the wedge are omitted. The concrete form clamping washer A according to the present embodiment includes a single-step pressing surface 1, a two-step pressing surface 2, a first-step pressing surface side insertion hole 3, a two-step pressing surface side insertion hole 4, and a one-step pressing surface side. The main configuration includes a stopper 5, a two-stage pressing surface side stopper 6, a parallel surface portion 7 of the two-stage pressing surface, and a wedge 8.

The one-stage pressing surface 1 is provided with an assembled form 11
And the two-stage pressing surface 2 faces one flutter angle 13. The belt-like steel plate is opened at a length-to-short ratio (this embodiment). About 13 in form
5 °), the long side is a one-stage pressing surface 1 and the short side is a two-stage pressing surface 2. 14 is the bending point. At this time, the reinforcing ribs 9 are erected on both sides of the pressing surface so that the side edge of the strip-shaped steel plate is bent over the entire length and has a substantially U-shaped cross section. On the side of the one-stage pressing surface 1, there is provided a one-stage pressing surface-side stopper 5 formed by bending the outer end portion to have a relatively long dimension in the one-stage pressing surface direction. 15 is the bending point. Also,
At a substantially central portion between the bending point 15 and the bending point 14, an elongated hole-shaped single-stage pressing surface side insertion hole 3 long in the pressing surface width direction is provided. The one-step holding surface 1 is formed with a sufficient length. Reference numeral 16a denotes an edge on the one-stage pressing surface side.

A bent line is not provided on the side of the two-stage pressing surface 2, and a cutting line 17 is inserted into an in-plane position having a width of about 5 mm from the edge 16b on the side of the two-stage pressing surface.
7, the end side is extruded (cut and extruded) to the two-stage press surface 2 side to provide a two-stage press surface side stopper 6. At this time, extrusion molding is performed so that the cutting line 17 projects perpendicular to the two-stage pressing surface 2. Also, between the cutting line 17 and the bending point 14, when viewed from the back surface 2 a side of the two-stage pressing surface 2, the width of the bending point 14 side is about 5 mm, and the same two-stage pressing surface side as above. An insertion hole 4 is provided. The width portion of about 5 mm becomes the parallel plane portion 7 having the same height as the back surface 2a. Then, a length having a margin slightly smaller than the surface width of the flap angle 13 is provided between the edge 18 on the stopper 6 side in the through hole 4 on the two-stage pressing surface side and the bending point 14 so that the two-stage pressing surface 2 is formed. Are formed.

In the drawing, reference numeral 20 denotes a wedge storage stopper formed by inserting a cutting line 21 into the reinforcing rib 9 on the one-stage pressing surface 1 and extruding the same on the back surface 1a of the one-stage pressing surface. And to facilitate handling before setting. 22 is a guide for setting the wedge, and 23 is the long side of the wedge. The guide 22 may be separately provided on the back side of the two-stage pressing surface.

Next, the operation of the washer A for fastening the concrete formwork of this embodiment will be described. First, when the flute angle is two-stage, as shown in FIG. 7, the extension shaft 24 with the wedge set hole protruding from the two-stage flap angle 13 is inserted into the two-stage pressing surface side insertion hole 4, The step holding surface 2 is set so as to face the flutter angle 13. At this time, the edge 16a on the one-stage pressing surface 1 side comes into contact with the formwork 11. Since a set hole 26 is exposed on the extension shaft 24 with a wedge set hole protruding from the back surface 2a of the two-step holding surface, the wedge 8 is driven into the set hole 26. In this case, since the setting hole 26 is located between the back surface 2a of the two-stage pressing surface and the parallel surface portion 7 which is parallel to the same height, the long side 23 of the wedge faces the back surface 2a and the parallel surface portion 7. In this state, the space between the two-stage pressing surface 2 and the formwork 11 is reduced, and the two-stage flutter angles 13 and the formwork 11 are integrated. When the wedge 8 is driven, since the long side 23 of the wedge is received by the parallel surfaces on both sides of the insertion hole, the surface pressure is reduced by that amount, and the corner of the edge of the insertion hole is not slackened. For this reason, even if the wedge 8 is firmly driven,
Since the stopper side of the wedge does not rise, the flap angle is 1
The mold 11 can be firmly maintained without loosening the mold 3.

When the wedge 8 is driven, the washer A for tightening the concrete form is subjected to an external force to move it downward (in the driving direction). At this time, the two-stage pressing surface side stopper 6 is in a state where the cutting line 17 side is engaged with the flat portion of the flutter angle 13 and locked. In this case, cutting line 1
Since there is no curved portion between the side 7 and the two-stage pressing surface 2, it is impossible for the stopper 6 to ride over the flutter angle 13. Therefore, even if the wedge 8 is firmly driven, the stopper 6 does not shift, so that the form 11 can be firmly maintained without loosening the flutter angle 13.

Next, when the butter angle is one step, as shown in FIG. 6, an extension shaft 24 with a wedge set hole protruding from the butter angle 12 arranged in one step is inserted into the one-step pressing surface side insertion hole 3. Then, the first pressing surface 1 is set so as to face the flutter angle 12. At this time, the edge 16a on the two-stage pressing surface 2 side is in a state of being in contact with the formwork 25. Since a set hole 27 is exposed on the extension shaft 24 with a wedge set hole protruding from the back surface 1a of the one-step pressing surface, the wedge 8 is driven into the set hole 27. In this case, the set hole 27 is located on the back surface 1a of the one-step holding surface.
, The long side 23 of the wedge faces the substantially entire surface of the back surface 1a, so that the one-step pressing surface 1 and the mold 25
And the flutter angle 12 and the formwork 25 are integrated. In this case, the wedge 8 is not lifted by the back surface 1a and the stopper 5 on the one-stage pressing surface side can be formed relatively long.
It is impossible to get over the corner of For this reason, the mold 25 can be firmly shaped without loosening the flutter angle 12.

Although the embodiment of the present invention has been described above, the specific configuration of the present invention is not limited to this embodiment, and a design change or the like may be made without departing from the gist of the present invention. If so, they are included in the present invention.

For example, the push-out shape of the stopper 6 is arbitrary.

[0021]

As described above, the washer for tightening the concrete form according to the first aspect of the present invention comprises:
Because of the above configuration, that is, a cutting line was inserted at the end of the two-stage pressing surface, and the end was extruded from the cutting line to form the stopper, so that the side in contact with the flap angle of the stopper has the cutting line side on the pressing surface. On the other hand, it suddenly protrudes and does not form a curved portion, and therefore, the stopper fits exactly in the corner of the flutter angle and cannot be climbed. Therefore, even if the wedge is firmly driven, the stopper does not shift, so that the form can be firmly maintained without loosening the flutter angle.

According to the second aspect of the present invention, the washer for fastening the concrete formwork has the above-mentioned structure, that is, both sides of the insertion hole on the back side of the two-stage pressing surface are the back of the two-stage pressing surface and the two-stage Since the pressing surface is formed by the back surface and the parallel surface portion having the same height, when the wedge is driven into the extended shaft with the wedge set hole protruding from the insertion hole, the wedge is received by the parallel surfaces on both sides of the insertion hole. However, the surface pressure is reduced by that amount, and the corner of the edge of the insertion hole is not slackened. For this reason, even if the wedge is firmly driven, the stopper side does not rise, and the form can be firmly maintained without loosening the flutter angle.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a washer for fastening a concrete formwork according to an embodiment of the present invention.

FIG. 2 is a front view showing the washer for fastening the concrete formwork of the above.

FIG. 3 is a plan view showing the washer for fastening a concrete formwork in the above.

FIG. 4 is a bottom view showing the washer for fastening the concrete formwork of the above.

FIG. 5 is a sectional view taken along line aa of FIG. 2;

FIG. 6 is an explanatory diagram showing a use state in which a one-stage butterfly angle is fixed.

FIG. 7 is an explanatory diagram showing a use state in which the two-stage flutter angle is fixed.

FIG. 8 is a front view showing a conventional concrete mold clamping washer.

FIG. 9 is an explanatory view showing a usage state of a conventional washer for fastening a concrete formwork.

FIG. 10 is an explanatory view showing a usage state of a conventional washer for fastening a concrete formwork.

[Explanation of symbols]

 A Washer for concrete formwork tightening 1 1st holding surface 2 2nd holding surface 2a Back surface of 2nd holding surface 3 1st holding surface side insertion hole 4 2nd holding surface side insertion hole 5 1st holding surface side stopper 6 2nd holding surface side Stopper 7 Parallel surface part on the back side of the two-stage press surface 8 Wedge 11, 25 Formwork 12, 13 Butter angle 14 Bend point of press surface 15 Bend point of stopper 5 16b Edge of two-stage press surface 17 Cutting line 18 Two-stage press Stopper side edge of surface side insertion hole 24 Extension shaft with wedge set hole

Claims (2)

[Claims] 1. An assembling concrete formwork having a single-step pressing surface which can be faced with two parallel flutter angles along a single step and an upper step which can face a flutter angle along a two-step stack. While having the two-step holding surface and the leg opened at a predetermined angle,
For tightening a concrete form having a through hole for an extension shaft with a wedge set hole protruding from the concrete form on each of the press surfaces, and having a stopper at each end of the press surface to prevent the flutter angle from coming off. In the washer, a stopper provided at an end of the two-stage pressing surface inserts a cutting line at an in-plane position having a predetermined width from an edge of the two-stage pressing surface, and the end side from the cutting line is a two-stage pressing surface. A washer for tightening a concrete formwork, which is provided by extrusion molding on a side. 2. A one-stage pressing surface which can be faced with two parallel butter angles along the outer surface of an assembled concrete formwork, and a one-stage pressing surface which can be faced with an upper butter angle along a two-stage stack. While having the two-step holding surface and the leg opened at a predetermined angle,
For tightening a concrete form having a through hole for an extension shaft with a wedge set hole protruding from the concrete form on each of the press surfaces, and having a stopper at each end of the press surface to prevent the flutter angle from coming off. In the washer, an insertion hole provided in the one-stage pressing surface is opened at a substantially central portion in a longitudinal direction of the one-stage pressing surface, and an insertion hole provided in the two-stage pressing surface is two steps from an edge of the insertion hole. A washer for tightening a concrete formwork, wherein the washer is opened so as to have a parallel surface portion at the same height as the back surface of the two-stage pressing surface between the pressing surface and the end of the one-stage pressing surface side.