JPH0220356Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is used to prevent the formwork from separating by installing it at the corner of a reinforced concrete formwork and using it together with a separate rope, etc. The present invention relates to a tightening aid, namely a corner lock.

[Conventional technology and issues]

Most formwork materials are installed after reinforcing bars are placed and before concrete is poured, but since heavy concrete is being poured into the formwork, various fixing members are used to install the formwork. Among these, the outside of the corner receives more force in the outward direction during concrete pouring, and some fixing members are designed specifically for corners, taking this into consideration. In this method, the ends of the separators that connect the formworks are connected and tightened using multiple chains and turnbacks, and the operation is extremely complicated, and moreover, the tightening is performed uniformly using multiple chains at once. It was difficult to tighten with sufficient force, and the tightening was often uneven.

[Means to solve the problem]

Therefore, the present inventor devised a formwork tightening aid that can be tightened uniformly and is easy to handle.The main feature of this tool is that it prevents the corner parts of the formwork installed before concrete pouring from separating. This is a corner lock that is placed vertically on the outside of the point where the horizontal flaps intersect, and a separate rope is fixed at one end and is passed over the outside of the corner lock to secure the shape of the horizontal flap. Hang it at an appropriate point on the part facing the frame, and then stretch it across the right and left sides of the horizontal butterfly in an appropriate place on the opposite side of the formwork and pull it. A rectangular base material with a square cross section and a row of male screws fixed to the diagonal outside of the square shape along one ridgeline, and a separate body from the base material. A tightening base material having an L-shaped cross section and having a hole at a location facing the male screw of the base material, and a thread groove is carved inside the base material so that it can be screwed into the male screw, and one end thereof The fastener has a flange edge large enough to prevent passage through the hole.

〔Example〕

The present invention will be described in detail below based on embodiments shown in the drawings.

FIG. 1 shows an example of the present invention. The corner lock 1 consists of a square pipe-shaped base material 2 with a square cross section and an L-shaped tightening base material 3, and the base material 2 is provided with a plurality of screws 4. Furthermore, one tightening element 5 is screwed onto each screw 4. A hole 6 in the shape of a keyhole, that is, a combination of a circular hole and a rectangular hole, is formed in the tightening base material 3 at a location facing the screw 4.

FIG. 2a is an enlarged view of the tightener 5. FIG. As is clear from the figure, the tightener 5 has a nut-like structure, and is provided with a thread groove so that it can be fitted and screwed into the screw 4.

Further, the tightener 5 has a flange 51 on the outermost side and an L-shaped branch 52 near the center, and the flange 51 passes through the circular hole portion of the hole 6 but has a rectangular portion. is large enough not to pass through.

FIG. 2b is also a longitudinal cross-sectional view of the tightener 5, showing the thread groove 7 and the like.

Next, how to use the corner lock of this invention.
The following explanation will be made using the example corner lock 1 shown in FIG.

Figure 3 shows the most common state in which the formwork 8 is installed after reinforcing, and separators 9, vertical flaps 10, horizontal flaps 11, etc. are attached.
The separators 9 are fixed by wedges 12, respectively.

As is clear from the figure, at the orthogonal corners, the horizontal butterflies 11 intersect with each other, but when the concrete is poured, it is heavy and liquid, so it exerts a large pressure on the formwork surface. It turns out. In this case, even if the formwork 31 on the inside of the corner is pressed, it will be pushed back by the formwork 31' which is orthogonal to each other, and although it is a corner, there is no problem due to the failure, but on the outside of the corner. In the formwork 32, the formworks are pressed in a direction that separates them from each other. (Fig. 4) Therefore, the corner lock 1 of the present invention is installed with 132 one-touch lamps at the intersections of the corner horizontal flaps 11. This one-touch clamp 13
The idea is to clamp the corner lock 1 from three directions by rotating the clamping part 14 by 90 degrees with the base fixed to the flap, but this is not essential to the present invention. (Fig. 5) The installation should be done so that the tightening base material 3 is exposed and the holes 6
Do this so that the circular part is facing downward. and,
Adjust the tightening base material 3 so that the tightening element 5 passes through the rectangular portion of the hole 6. (In this state, the tightening base material 3 cannot cross the flange 51 of the tightener 5 and approach the base material 2 side.) Note that the corner locks 1 are installed at locations where they intersect at the corners of the formwork. This is the intersection of the horizontal flaps, and of course the outer part (each of the perpendicular horizontal flaps extends to the corner of the formwork and intersects beyond it, but the horizontal flaps beyond this point, that is, the formwork) The part that is sandwiched between the horizontal flaps and is not facing the outside part is called the outside part.

Next, as shown in FIG. 7, a hook 15 attached to one end of a sufficiently strong rope 16 (a wire rope in this example) is hung on the formwork side of the separator 9, and then the formwork of the separator 9 on the other side of the formwork is hung. Pass the rope 16 to the side and pass it alternately, making the rope 16 zigzag until it reaches the lower end of the formwork (or the upper end if work is started from the lower end).

A clip 17 is attached to the final end and fixed by pulling. Therefore, by tightening only the clip 17, it is possible to tighten the entire body. Therefore, even in this state, the formwork is prevented from swelling during concrete pouring (as in the conventional case), but in the case of the present invention, further tightening is performed at this point. That is, in the state up to FIG. 7, the gap between the base material 2 and the tightening base material 3 was extremely small (FIG. 8a), but after tensioning the rope 16 in that small gap, the base material The tension of the rope 16 is increased by increasing the gap between the rope 2 and the tightening base material 3. To put it simply, the method is to rotate the tightening element 5 to separate it from the base material 2 along the thread groove, and the flange edge 51 presses the tightening base material 3. The base material 2 and the tightening base material 3 are separated. (Fig. 8b) Therefore, the fixation of the formwork becomes extremely strong.

Note that the armature 52 is used to reduce the force required by using steel or the like after the tightening element 5 is rotated quickly with fingers to a certain extent, but even if it does not have the armature 52, it can be tightened. An important part of the effect of the present invention is not impaired.

Furthermore, by utilizing the fact that the hole 6 is made up of a circular part and a rectangular part, the flange edge 51 of the tightening element 5 is brought out to the outside of the tightening base material 3 when no work is being performed, and the flange edge 51 It is possible to prevent the base material 2 and the tightening base material 3 from shaking by pressing the rectangular portion of the hole 6 through which the material cannot pass. However, since the shape of this hole 6 can be various,
Various measures may be taken depending on the situation, and the present invention is not limited to these.

FIG. 9 shows one of the other embodiments of the base material 2, in which the screws 4 are not directly fixed to the base material 2 body in order to facilitate the replacement of the screws 4, but the screws and the pedestal are The screw member 41 that combines the two is screwed together. Therefore, if the screw 4 becomes bent or the thread groove is crushed, it can be easily dealt with. Further, although the base material 2 has been described as a square pipe-shaped steel material, it may of course be of other shapes and materials.

In addition, the work and effectiveness can be improved by providing irregularities on the corners of the tightening base material 3 to prevent the rope 16 from slipping.

[Effect of idea]

As explained in detail above, the corner lock of the present invention is a corner lock that is installed vertically on the outside of the area where horizontal flaps intersect in order to prevent the corner portion of the formwork installed before concrete pouring from separating. , fix one end of a separate rope, cross over the outside of the corner lock, and span it over the appropriate part of the side flap facing the formwork, and then It is stretched across appropriate parts of the part of the butterfly facing the formwork and pulled, and the tension presses the horizontal butterfly in the direction of the formwork. A square-shaped base material having male screws fixed in a row on the outside in a diagonal direction, and an L-shaped cross section that is separate from the base material and has a hole at a location facing the male screws of the base material. a tightening base material having a shape, and a tightening element having a thread groove cut therein so as to be able to be screwed onto the screw, and one end of which has a flange edge large enough to prevent passage through the hole. This method is characterized by the fact that it is very different from conventional methods, such as tightening several places using multiple chains, and only requires the use of a single rope for tightening. By extending the corner lock of the present invention installed at the intersection of the horizontal butterflies, all the horizontal butterflies can be pressed against the formwork by simply tightening the clip 17 at one location (in this specification, the clip 17). In addition, the method of tightening is uniform, and the tightening force can be further increased by rotating the tightening element and increasing the distance between the base materials and the tightening base material. This is a very simple and extremely useful idea in practice.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view including a partially enlarged view showing an example of the present invention, Figs. The figure is a perspective view showing the installation location of the present invention, and Figure 4 is a schematic diagram showing the pressure of concrete and the direction in which the formwork is pressed.
Fig. 5 is a perspective view showing an example of a one-touch clamp used in the present invention if necessary, Fig. 6 is a perspective view showing an example of a clip used in the present invention if necessary, and Fig. 7 is A perspective view showing the actual installed state of the corner lock of the present invention, Figures 8a and b
9 is a partial end view showing the function of the tightener, and FIG. 9 is a perspective view showing another embodiment of the present invention. 1... Corner lock, 2... Base material, 3... Tightening base material, 4... Screw, 41... Screw member, 5...
Tightener, 6...hole, 7...screw groove, 8...formwork,
13... One-touch clamp, 16... Rope.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A corner lock installed vertically on the outside of the intersection of horizontal flaps in order to prevent the corner parts of the formwork installed before concrete pouring from separating, and is separate from this. After fixing one end of the rope, extend it across the outside of the corner lock to the appropriate part of the horizontal butterfly facing the formwork, and then in turn face the formwork of the horizontal butterfly on the left and right opposite sides. The cross section is square in cross-section, and along one ridgeline of the horizontal butterfly is stretched across the appropriate parts of the part and pulled, and the tension presses the horizontal butterfly in the direction of the formwork. a rectangular base material to which male screws are fixed in a row; and a tightening base material that is separate from the base material and has an L-shaped cross section and has a hole at a location facing the male screws of the base material. , a tightening element having a thread groove cut inside thereof so as to be able to be screwed into the screw, and one end of which has a flange edge large enough to prevent passage through the hole; Corner lock featuring. 2. The corner lock according to claim 1, wherein the hole has a reverse keyhole shape, that is, the lower part is circular and the upper part is an elongated hole with a width smaller than the diameter of the circular shape. 3. The corner lock according to claim 1 or 2, wherein the tightener has an L-shaped branch that opens toward the end opposite to the outer flange edge.