JPS6219792Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a metal fitting used to maintain the spacing between forms when assembling concrete forms.

To maintain the spacing between concrete forms, it is common to use bolts with threaded grooves at both ends, called round separators, in combination with fastening fittings such as cons and form ties (registered trademark). This construction method is widely adopted both when using plywood formwork and when using steel formwork, but in recent years, in the case of steel formwork, it has been In some cases, a construction method has been adopted in which the formwork is connected to the frame part using special metal fittings, instead of being connected by the face plate part.

The present invention provides a new metal fitting for this construction method exclusively for steel formwork (in this specification, unless otherwise specified, "formwork" refers to steel formwork, also known as metal form). - means.).

The metal fitting according to the present invention is used in combination with the round separator widely used in the conventional construction method, and (a) has an enlarged part in the middle and is circular to the ends on both sides of the enlarged part. A round separator screw-in member made of a columnar steel bar and having a female thread for screwing in a round separator in the enlarged part; (b) A member between formworks made of a card-like steel plate having a hole in the center into which a formwork connection clip can be inserted. Insertion part; and (c) consisting of a steel plate bent into a round-bottomed flask-shaped cross section, the end of which is fixed to one end of the inter-form insertion part, and the curved part of which is inserted into the middle of the round separator screwed member. It consists of three parts: a round separator screw-in member holding part that holds the round separator screw-in member rotatably by sandwiching the columnar parts on both sides of the ampullae;

Next, the present invention will be described with reference to specific examples and drawings.

FIG. 1 is a perspective view showing an example of a metal fitting according to the present invention, and FIG. 2 is a plan view of the same metal fitting, in which 1 is a round separator screw-in member, 2 is an inter-form insertion part,
3 is a round separator screw-in member holding part.

The round separator screw-in member 1 is shown in FIGS. 3 to 5 (FIG. 3 is a perspective view, and FIG.
(The figure is a plan view, and FIG. 5 is a front view seen from the axial direction). It is rod-shaped as a whole. A female thread 6 into which a round separator is screwed is formed in the intermediate enlarged portion 4 in the manner shown in the figure.

The inter-form insertion part 2 is a card-shaped member whose length D ₀ is approximately equal to the width of the form frame, and a clip for connecting the formwork can be inserted snugly into the center. It has a hole - a clip insertion hole 21.

The round separator screw-in member holding part 3 is formed by bending a rectangular steel plate so that its longitudinal cross section has a round-bottomed flask shape (similar to the side surface 31 shown in FIG. 1). . In this case, by providing in advance a notch 32 in the holding portion forming steel plate that matches the middle expanded portion 4 of the round separator screw-in member, only the cylindrical portions 5 on both sides of the round separator screw-in member are held between the curved portions 33 of the steel plate. It is designed so that Then, near the tip 34 of the bent steel plate, it is fixed to one end of the inter-form insertion part 2 using studs 7 in such a manner that it is held therebetween.

Since the round separator screw-in member 1 is simply held between the curved portion 33 of the steel plate of the round separator screw-in member holding portion 3 as described above, it can be rotated about its longitudinal central axis Y-Y. It is possible to move. However, because there is an intermediate ampullae,
It will not fall off naturally from the holding part 3.

FIG. 6 shows another example of the metal fitting according to the present invention,
Figure B is a front view, and Figure B is a plan view. In this example, the round separator screw-in member holding portion 3a consists of two parts 3a ₁ and 3a ₂ made by bending different rectangular steel plates.

(The symbols in Fig. 6 have the same meanings as the symbols with the same numbers in Fig. 1 without attachment a.) Next, Fig. 7 shows how to assemble the formwork using the metal fittings shown in Fig. 1. This will be explained with reference to the following drawings.

In Fig. 7, 8 to 11 are formworks (frame a
and a partial view of the face plate b in the vicinity thereof). When assembling these formworks, first screw both ends of the round separator 12 into the female threads 6 of the metal fittings 13, and then insert the inter-form insertion part 2 of the metal fittings between the frames of the formworks as shown. The metal fittings and the formwork are connected by aligning the clip holes 14 of the formwork with the clip insertion holes 21 of the metal fittings and attaching the clips 15. Alternatively, after connecting the metal fitting 13 to the formwork, the round separator 12 is screwed into the female thread 6 of the metal fitting. In order to facilitate the operation of matching the formwork clip holes 14 and the clip insertion holes 21 of the metal fittings in the above operation, the clip insertion holes 21 are inserted from the end 35 of the interform insertion part of the round separator screwed member holding part of the metal fittings. The distance to the center of D ₁ (second
It is advisable to manufacture the metal fittings so that the distance (see figure) matches the distance _D2 from the surface of the face plate of the formwork to the center of the clip hole 14. After inserting the inter-form insertion part between the frame parts 8a and 9a of the form, when the end 35 is brought into contact with the face plate of the form, the clip insertion hole 21 appears at the position of the clip hole 14.

In a preferred mode of use of the metal fitting of the present invention, the profile 16 is fitted into the metal fitting 13 before the round separator 12 is screwed into the female thread 6. Mold material 1
6 is made of relatively soft plastic such as polyethylene, and its shape is as shown in Figure 8 (plan view).
Fig. 9 (A-A end face in Fig. 8) and Fig. 10 (Fig. 8
As shown in FIG.
-b and c-d are a pair). Further, there is a round separator insertion hole 18 at a position corresponding to the drainage hole of the flower pot, and the periphery thereof is thin and corrugated as shown in FIG.

FIG. 11 shows that the mold material 16 is fitted into the metal fitting 13,
Furthermore, the state in which the metal fittings 13 are connected to the formworks 8 and 9 as described above is shown in FIG. 8B-B for the formwork 16.
FIG. 3 is a cross-sectional view taken along lines. To achieve this state, the fitting pieces 17a and 17b (and 17c
and 17d), the curved part 33 of the round separator screw-in member holding part of the metal fitting is fitted by pushing strongly from the left and right directions in the same figure. The thin edge 20 at the upper end of the side wall 19 of the form is deformed to form the face plate 8b of the form,
Closely attached to 9b.

FIG. 12 shows a state in which the round separator 12 is passed through the round separator insertion hole 18 and screwed into the female thread 6 of the metal fitting (that is, the state shown in FIG. 7), and the shape material 1
6, at the position of line A-A in FIG.
FIG. 3 is a diagram showing only the formworks 8 and 9 in cross section.

In this way, the distance between the opposing formworks is fixed, and the space around the exposed part of the metal fitting 13 is surrounded by the form material 16, so even if concrete is poured after this, there will be no concrete in this part. No inflow. Therefore, when the formwork is dismantled and removed after the concrete has hardened, the tip of the round separator 12 and the metal fitting 13 will be exposed from the recess in the concrete surface formed by the form material 16. Can be removed from the separator. At this time, the shape material 16 comes off from the concrete as the metal fitting 13 rotates and is removed together with the metal fitting, or only the fitting piece 17 is destroyed. After removing the remaining part of the mold material 16, mortar is filled into the recess in the concrete surface where the tip of the round separator 12 is exposed, thereby forming a flat concrete surface.

The mold materials used in combination with the metal fittings are not limited to those mentioned above, but the point is that they can be attached to the metal fittings, and that the metal fittings can be removed from the round separator when the cast concrete has hardened and the formwork is removed. Any shape may be used as long as it can form a sufficient space around the metal fitting for rotation in order to remove it. Suitable materials include plastics such as polyethylene and polypropylene, as well as rubber.

If the above-mentioned forms are not used, when the formwork is removed after the poured concrete has hardened, the insertion part between the formworks will be exposed on the concrete wall surface, so break it off by hitting this part with a hammer, etc. do it. In order to facilitate this breaking operation, it is preferable to make a broken line stamp at the base of the exposed portion of the inter-form insertion portion.

By the way, in actual concrete formwork assembly work, as shown in Figure 7, the fixed positions of the round separators in opposing formworks are not necessarily at the same height and the formwork surfaces are not necessarily perpendicular, so the round separators are not necessarily fixed in the formwork. It often happens that it is not possible to take a posture perpendicular to the frame surface. The same thing can happen whenever the other side of a round separator screwed into a metal fitting is connected to an anchor bolt buried underground, or when one or both sides are sloped, as in various types of dam construction. Even in such cases, the metal fitting of the present invention can be used by rotating the round separator screwing member to swing the direction of the center axis of the female screw 6 by the angle required for screwing the round separator (or by rotating the round separator screwing member). After screwing the separator into the internal thread 6, the round separator threaded member may be rotated by causing the round separator to take the desired position - see FIG. 13).

Fig. 14 is a schematic diagram showing an example of an inclined formwork assembled using the metal fittings of the present invention, in which a to k are the formwork, 12' are anchor bolts, and other symbols are the same as in Fig. 7. They have the same meaning.

As is clear from the above description, when the metal fittings of the present invention are used, the fixing wall connecting the opposite end of the round separator connected to the steel formwork can be used not only when the fixed wall is a similar steel formwork. It can be applied to any wall surface such as plywood formwork, floors, concrete walls, masonry walls, etc., and has the advantage that there is no need to use special metal fittings exclusively for assembling inclined formwork.

A particular advantage of the metal fitting of the present invention is that it can be used in combination with a round separator, which has been widely used for maintaining formwork spacing, and the length of the part of the metal fitting that protrudes from the formwork surface is By aligning t (see Figure 7) with the axial length of the condenser conventionally used in combination with a round separator, the formwork can be assembled in exactly the same way as conventional concrete formwork assembly using a round separator and condenser. Can be assembled.
In that case, the formwork interval L can be changed by using round separators of various sizes, but furthermore, when using a round separator with a longer threaded part than usual and the metal fitting of the present invention, It is also possible to finely adjust the mold spacing L, if necessary. In other words, the metal fittings of the present invention are
Since the round separator screw-in member holding part is structured to hold only the columnar part 5 of the round separator screw-in member, the hole formed accordingly (the hole between the notch 32 and the enlarged part 4 in FIG. ) in the direction of the insertion part between forms, as in the hole in the example in Figure 6, the screwing amount of the round separator with a long threaded part (therefore, the formwork interval) can be adjusted from the standard value to the standard value plus. It can be adjusted within a range of several mm. By combining this method with the use of round separators of various sizes, it is possible to set the formwork spacing virtually steplessly.

The hole in the round separator screw-in member holding part by the notch 32 not only allows the round separator to be deeply screwed in as described above, but also serves as a flow path for air or mortar during concrete pouring when a profile is not used. It has the effect of preventing cavities from forming on the underside.

The metal fitting according to the present invention also has a pair of round separator threaded members with opposite threads and one with normal threads, and when using a round separator with only one thread having a reverse thread, it can be of the type shown in Fig. 7. Even after frame assembly is complete, the spacing between forms can be finely adjusted by rotating the round separator.

As described above, using the metal fittings of the present invention greatly simplifies the formwork assembly work and improves efficiency and precision.
The metal fittings of the present invention can not only be manufactured inexpensively from steel plates and steel bars, but also be used in combination with the inexpensive and easily available round separators as mentioned above. Since the mold can be removed and reused after use, this invention has made it possible to assemble the mold at an extremely low cost.

[Brief explanation of the drawing]

FIG. 1: A perspective view showing an embodiment of the present invention. Second
Figure: Plan view of the metal fittings in Figure 1. 3 to 5: The round separator screw-in member 1 in the metal fitting of FIG. 1 is shown, with FIG. 3 being a perspective view, FIG. 4 being a plan view, and FIG. 5 being a front view. Figure 6: Another embodiment of the present invention is shown, with Figure A being a front view and Figure B being a plan view. Figure 7, 1st
1 to 14: Explanatory diagrams of examples of use of the metal fittings in FIG. 1. FIG. 8: A plan view showing an example of a molded material used in combination with the metal fitting of the present invention. FIG. 9: A cutaway end view of the fitting shown in FIG. 8 along the line A-A. FIG. 10: A cut end view taken along the line BB of the mold material shown in FIG. 8. 1: Round separator screwed member, 2: Formwork insertion part, 3: Round separator screwed member holding part, 4: Ampulla, 5: Cylindrical part, 6: Female thread,
7: Studs, 8-11: Formwork, 12: Round separator, 13: Metal fittings shown in Figure 1, 15: Clips, 1
6: Model material.

Claims (1)

[Scope of Claim for Utility Model Registration] (a) A round separator made of a bar-shaped steel material that has an ampulla in the middle and is cylindrical to both ends of the ampulla, and has a female thread in the ampulla for screwing into the round separator. Screw-in member; (b) An inter-form insertion part made of a card-shaped steel plate with a hole in the center into which a clip for connecting the form can be inserted; The end portion is fixed to one end of the inter-form insertion part, and the round separator screw member is rotatably held by holding the cylindrical portions on both sides of the middle enlarged portion of the round separator screw member with its curved portion. Separator screw-in member holder: A metal fitting for assembling concrete formwork.