JPH0348378Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a method for transferring decorative patterns such as uneven patterns to the surface of concrete material being placed in contact with the surface of the concrete material being poured at construction sites such as concrete buildings. The present invention relates to a formwork connection structure for concrete pouring that is equipped with a formwork that can be used for pouring concrete.

[Conventional technology]

When constructing a concrete building on-site, the first panel is created by joining multiple concrete casting forms, and at the same time, the second panel is created by joining multiple concrete casting forms in the same way. Making,
Concrete material is flowed between the two panels and cured and hardened. In order to improve the appearance of the exterior walls of the above-mentioned concrete buildings, it is common to transfer uneven patterns, etc., and transfer such uneven patterns to the panels on the side where the external walls are formed. The mold is formed with a surface elastic layer for transferring the uneven pattern. Generally, for such decorative formwork, a liquid resin composition such as a foam-curable urethane resin is poured into a mold, a plywood serving as a substrate is placed on the liquid surface, and the liquid is poured in that state. Those manufactured by foaming and curing a resin composition are used. This decorative formwork is integrally formed with a surface elastic layer whose surface layer is formed of a relatively hard integral skin layer and whose surface has an uneven pattern or the like formed thereon.

In actual on-site construction, the above decorative formwork is
As shown in FIG. 6, a plurality of decorative formworks 20 are joined together, then the crosspieces 21 are nailed to form a panel, and a metal reinforcing pipe 22 is attached to the crosspieces 21 in order to withstand the pressure of the concrete material being placed. It is constructed by arranging it at right angles to the At that time, a connecting rod insertion hole (not shown) for fixing the reinforcing pipe 22 is opened in the decorative formwork 20, the connecting rod 23 is inserted into this hole, the reinforcing pipe 22 is then arranged, and The reinforcing pipe 22 is held with a form tie (registered trademark) 24 with a washer, and this form tie 2
4 is fixed with a wedge or the like.

[Problem that the invention attempts to solve]

However, the formwork connection structure for concrete pouring using the above-mentioned decorative formwork has the following drawbacks.

When forming decorative formwork into panels, it takes time and effort to nail crosspieces to the decorative formwork, and then drill holes through which the connecting rods are inserted, resulting in poor work efficiency.

Further, since nailing is usually performed from the surface side of the elastic board having a decorative pattern such as an uneven pattern, there is a risk of damaging the decorative pattern, which impedes speedy work.

Furthermore, the above hole has the same diameter as the connecting rod,
Repeated use creates a clearance between the hole and the connecting rod, and the concrete material to be poured may enter the clearance, making it difficult to disassemble the formwork, or the clearance may cause the decorative formwork and the connecting rod to be fixed. Looseness occurs, which also impedes on-site workability.

This invention was devised based on these circumstances, and its purpose is to provide a formwork connection structure for concrete pouring that has excellent on-site workability.

[Means for solving problems]

In order to achieve the above-mentioned purpose, the concrete pouring formwork joint structure of this invention consists of a substrate, through-holes formed in the substrate at predetermined intervals, and a rigid structure with a flange at the end fitted into the through-hole. A bush made of a material, an internal thread formed on the inner surface of the hole of the bush, a surface elastic layer for transferring an uneven pattern formed on a substrate on the side where the flange of the bush is located and covered with the bush, and A first formwork for concrete pouring is provided with a bar-shaped screw that is engaged with the bushing from the back side of the substrate so that its tip breaks through the surface elastic layer, and a connecting screw protrudes from the surface of the first concrete casting formwork. The inner threaded part is divided into two from approximately the center by a partition wall or an unthreaded part, and is faced to the second concrete casting formwork with the surfaces facing each other at a predetermined interval. The tip of the rod-shaped screw of the first formwork is attached to one of the split threaded parts of the joint nut that is
The first and second molds are connected to each other by fitting the ends of the connecting screws of the second formwork to the other split screw part.

That is, according to this invention, there is no need to nail the crosspieces or drill holes for the connecting rods to pass through, as in the past, and it is possible to connect the screws of the first and second formwork to the joint nuts. The first and second formwork can be joined by simply
Formwork work on site can be significantly simplified,
Moreover, a strong bond can be obtained. especially,
The screws of the first and second formworks are engaged with a special joint nut whose internal threaded portion is divided into two vertically from approximately the center by a partition wall or a non-threaded part. Since the second mold is connected, the threaded joint becomes strong, and the gap between the first and second molds can be kept constant. Therefore, a concrete wall or the like having uniform thickness can be formed without breaking the threaded joint in the joint nut due to the pressure of concrete material.

Next, this invention will be explained in detail based on examples.

〔Example〕

FIG. 1 shows an embodiment of this invention.
In other words, the drawing shows a first panel consisting of a plurality of first concrete casting forms and a second panel consisting of a plurality of second concrete casting forms facing each other at a predetermined interval. Shows part of the state. In the figure, reference numeral 1 denotes the first formwork for concrete pouring, and reference numeral 1a denotes its substrate made of plywood.Through holes 2 are formed in the substrate 1a at predetermined pitches in the length and width directions, respectively. . A bush 3 made of a rigid member (metal or hard resin) with an end flange is inserted into the through hole 2 with its flange 4 positioned on the surface of the substrate 1a, as shown in FIG. ing. As shown in FIG. 3, the bush 3 has an axial length equal to
a boss portion 5 having an outer diameter that is equal to the wall thickness of a and slightly larger than the outer diameter of the through hole 2;
, a flange portion 4 provided at one end of the boss portion 5 , and a cloth adhesive tape (covering member) 6 provided on the end surface of the flange portion 4 . A female thread 8' is cut on the inner circumferential surface of the boss portion 5. The flange portion 4 of the bushing 3 is positioned on the surface of the plywood as described above, and the other end surface of the bushing 3 on the side not having the flange portion 4 is connected to the substrate 1.
It is set to be flush with the back side of a. As shown in FIG. 1, on the substrate 1a into which the bush 3 is fitted, a surface elastic layer 7 for transferring an uneven pattern is formed by foaming and hardening urethane resin after the bush 3 is fitted.
are integrally formed by liquid cast molding. A relatively hard integral skin layer is formed on the surface layer of the elastic layer 7, and on the surface of the skin layer,
An uneven pattern is provided to transfer the uneven pattern to the poured concrete material. Numeral 8 is a rod-shaped screw that connects the bush 3 from the back side of the board 1a.
It is screwed in such a way that its tip passes through the surfaces of the cloth adhesive tape 6 and the elastic layer 7 provided on the bush 3. Near the rear end of the rod-shaped screw 8, a non-threaded portion 8a is formed in the circumferential direction with a predetermined width in order to make the screwing amount of the rod-shaped screw 8 constant. The rod-shaped screw 8 is always screwed in to this point. As described above, the first formwork 1 for placing concrete is composed of the base plate 1a, the bush 3 made of a rigid member with flanges at the end, the surface elastic layer 7, and the rod-shaped screws 8. A form tie 9 serving as a reinforcing material is attached to the back surface of the substrate 1a in the first concrete casting form 1 by engaging the rear end of the rod-shaped screw 8 with its own female threaded portion 9a. . Reference numeral 10 denotes a rotatable separator (connecting screw member having a threaded tip) protruding from the base plate of the second concrete casting form (not shown). Reference numeral 11 designates a hexagonal joint nut, the internal threaded portion of which is divided vertically into two parts by a partition wall 11a, forming a first divided threaded part 12 and a second divided threaded part 13. The tip of the separator 10 of the second mold frame is fitted to the part 12, and the tip of the rod-like screw 8 of the first mold frame 1 is fitted to the second divided threaded part 13, whereby the first and a second formwork are coupled together with their surfaces facing each other at a predetermined distance. Reference numeral 15 denotes a vinyl tube that covers the outer periphery of the rod-shaped screw 8 located between the joint nut 11 and the surface elastic layer 7, and prevents poured concrete material from adhering to the outer periphery of the rod-shaped screw 8.

The first and second panel assemblies using the first and second formworks are performed as follows.
That is, as shown in FIG. 2 and FIG.
A plurality of first formworks 1 each having a surface elastic layer 7 covering the surface are prepared, and a separator 10 is prepared.
A plurality of second formworks are prepared. and,
A plurality of first formworks 1 are joined to form a first panel. Next, the substrate 1a in the first formwork 1 is
A rod-shaped screw 8 is fitted to the bush 3 from the back side of the bushing 3, and its tip protrudes through the cloth adhesive tape 6 and the surface elastic layer 7.A vinyl tube 15 is fitted onto the protrusion, and then the joint nut 11 is fitted. The second divided threaded portion 13 of the partition wall 1 is intertwined with each other.
Screw in until 1a. The steel frame of the concrete building is then erected between the first and second panels before the second panel is erected. After this, multiple second
A second panel is formed by joining the formworks, a separator 10 is attached to each of the second formworks, and the threaded end of the separator 10 is screwed into the first divided threaded part 12 of the joint nut until it reaches the partition wall 11a. . In this case, the joint nut 11 is fixed with a spanner or the like to prevent it from rotating, and the joint nut 11 is screwed in this state. This allows the first and second
The formworks are connected and fixed with the specified spacing maintained,
As a result, the first and second panels are coupled and fixed with a predetermined spacing between them. In addition, the rod-shaped screw 8
A reinforcing form tie 9 is attached to the rear end by engaging its threaded portion 9a with the rear end of the rod-like screw 8.

In this way, the first and second panels can be easily assembled. In particular, in this embodiment, in order to connect the separator 10 and the bar-like screw 8 to the joint nut 11 having the central partition wall 11a, the ends of the separator 10 and the bar-like screw 8 are butted against each other at the center of the joint nut 11. This increases the connection strength. Therefore, it is possible to avoid a situation in which the connecting portion breaks due to pressure or the like during concrete material placement. Further, the presence of the partition wall 11a provides a guide for screwing, and the rod-shaped screw 8 can be safely screwed in until it comes into contact with the partition wall 11a, and a gap is created between the tip of the rod-shaped screw 8 and the tip of the separator 10. This will not lead to a situation where you are left behind. As a result, rusting caused by local variations in the spacing between the molds due to the remaining voids is prevented. In addition, the partition wall 11a
The amount of screwing in of the tip of the rod-shaped screw 8 is regulated, and thereby the joint nut 11 and the surface elastic layer 7 are
The distance between the two is now maintained properly at all times. Therefore, it is possible to prevent the occurrence of a situation in which the interval between the joint nut 11 and the elastic layer 7 becomes narrower and the vinyl tube 15 is destroyed or deformed due to the lowering of the joint nut due to excessive screwing of the tip of the rod-like screw 8. Become.

Note that the concrete material is cast between the first and second panels assembled as described above. After the concrete material hardens, the first and second panels constituting the first and second panels are removed.
By removing the formwork, structures such as concrete walls are formed. When removing the formwork, the tip of the rod-shaped screw 8 is removed from the hexagonal joint nut 11 by rotating the head screw hole of the rod-shaped screw 8 in the opposite direction. In this case, the separator 10, hexagonal joint nut 11 and vinyl tube 1
5 is left in the formed concrete wall or the like.

In the above embodiment, the joint nut 11 having the central partition wall 11a is used, but a joint nut having an unthreaded portion may be used instead of the partition wall 11a. In addition, as the end flange bushing 3, the flange portion 4 is not designed to prevent rotation, but as shown in FIG. A blade 4a formed thereon may also be used. In this way, when the rod-shaped screw 8 is screwed in, the bush 3 is prevented from rotating together, and the rod-shaped screw 8 can be screwed in properly. In addition, in the first formwork 1, there is a bush 3 that does not participate in joining with the second formwork.
Alternatively, as shown in FIG. 5, the aluminum angle 16 may be attached and fixed using head bolts 17. Furthermore, the through-hole 2 formed in the substrate 1a of the first formwork 1 is not limited to a circular cross-sectional shape, but may also have a rectangular shape such as a hexagon. Co-rotation can also be prevented by making the cross-sectional outer diameter of the portion 5 into a rectangular shape such as a hexagon. Also, Butsuyu 3
There is no problem in preventing the bushing from coming off in the axial direction since the flange part 4 of the bushing 3 is covered with the surface elastic layer 7, but a protrusion is provided on the outer surface of the boss part 5.
It is also possible to prevent it from coming off more reliably. Of course, regardless of the outer diameter shape of the boss portion 5 of the bush 3,
By adhering the bush 3 and the substrate 1a, the fixation of the two becomes reliable, and both rotation and slippage can be prevented. Further, the covering member 6 provided on the end face of the flange portion 4 of the bush 3 is not limited to the cloth tape as described above. There are no limitations as long as the tip of the rod-shaped screw 8 can be easily penetrated and the material forming the elastic layer 7 can be prevented from entering the bush 3 when forming the surface elastic layer 7. isn't it. For example, a paper adhesive tape or the like may be used.

[Effect of idea]

The formwork joining structure for concrete pouring of this invention connects the first and second formwork as described above, and in addition, as in the past, the crosspieces are nailed and the connecting rods are inserted. There is no need to drill holes in the board, making it extremely easy to install on-site. Furthermore, a stronger bond can be obtained compared to previous bonds. In addition, because a special joint nut is used to connect the screws used to connect the first and second formwork, the connection is strong and can withstand the pressure of placing concrete materials.
It becomes possible to form a constant interval between the first and second molds. As a result, it becomes possible to easily form a concrete wall or the like with a constant thickness.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of the main part of an embodiment of this invention.
Figure 2 is a plan view of the first formwork used therein,
The figure is an A-A' cross-sectional view, Figure 4 is an explanatory diagram of a modified example of the bushing, Figure 5 is an explanatory diagram of the state in which the aluminum angle is attached to the first formwork, and Figure 6 is an explanatory diagram of the conventional example. It is a partially cutaway perspective view explaining an aspect. DESCRIPTION OF SYMBOLS 1... First formwork, 1a... Substrate, 2... Through hole, 3... Bush, 4... Flange part, 5...
Boss portion, 7...Surface elastic layer, 8...Bar-shaped screw, 1
0... Separator, 11... Joint nut,
11a... Partition wall, 15... Vinyl tube.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A substrate, through holes formed in the substrate at predetermined intervals, a bushing made of a rigid member with an end flange fitted into the through hole, and the inner surface of the hole of the bushing. a surface elastic layer for transferring an uneven pattern formed on the substrate on the side where the flange of the bush is located and covering the bush, and the tip of the surface elastic layer itself breaks through the surface elastic layer. As shown in the figure, a first concrete casting form is provided with a rod-shaped screw that is engaged with the bush from the back side of the substrate, and a second concrete casting form is provided with a connecting screw protruding from the surface thereof. At one split threaded part of a joint nut, which faces the frame at a predetermined interval with its surfaces facing each other, and whose internal threaded part is divided into two from approximately the center by a partition wall or a non-threaded part. The tip of the rod-shaped screw of the first formwork is intertwined with the tip of the connecting screw of the second formwork, and the first and second formworks are combined. Characteristic formwork connection structure for concrete pouring. (2) The formwork for concrete pouring according to claim 1, wherein the part of the rod-shaped screw between the joint nut and the surface elastic layer is covered with a tube having a slightly larger diameter than the diameter of the rod-shaped screw. bond structure.