JP2566079Y2 - Connection structure of synthetic resin unit frame for building formwork - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure of unit frames made of synthetic resin to form a building formwork (including a civil work formwork) used in concrete casting work and the like.

[0002]

2. Description of the Related Art Conventionally, as a form frame of this type, a hard and thick wood plywood or steel plate is used as a face plate, and flanges (including square members) and ribs (including square members) are formed from the periphery thereof. It is a standing structure.

[0003] Therefore, conventional molds generally have a considerable weight and are not always easy to handle, and in the case of wooden ones, durability is particularly high, such as increased weight due to water absorption and early deterioration due to repeated water absorption and drying. There was also a problem. In addition, since the surface layer of the hardened concrete adheres to the steel plate or the wooden board, not only irregularities are generated on the concrete surface after removing the formwork, but also the concrete attached to the formwork surface must be removed before the next use. No.

[0004]

For this reason, some attempts have been made to extrude or draw out an aluminum material into a "harmonic" cross section in order to reduce the weight of the aluminum material. Extrusion or pulling out of irregularly shaped structural members is by no means easy, and daring to do so would lead to increased manufacturing costs. Further, aluminum has an affinity for concrete, like steel and wood, so that the problem that hardened concrete adheres to the surface of the aluminum formwork remains unsolved.

[0005] Therefore, the present invention makes it easy to integrally form a unit frame made of a synthetic resin material, which is lightweight, has sufficient strength, and has a dimension which is a fraction of the dimension of the mold, and which is connected when used. It is an object of the present invention to provide a unit frame capable of assembling a mold having a fixed size and to propose a connection structure capable of easily connecting these unit frames to solve the conventional problems at once. .

[0006]

An outline of the present invention which has been made to solve this problem will be described first with reference to the reference numerals in the drawings. Rectangular face plate having a size of 1 / integer (19)
And side plates (12) and (13) formed along the long side edge of the back surface of the face plate (19), and side plates (40) formed on the short side edge of the back surface of the face plate (19). (40), the side plate (40), a flange-shaped portion (14), (14) for mounting a square bar formed by projecting outward at the lower end portion of the (40)
And a number of convex ribs (15), (16) formed on the back surface of the face plate surrounded by the side plates (12), (13), (40), (40), and the convex ribs ( 15), a part of (16) is formed lower than the height of the side plate (40), furthermore, the long side portion side plate (1
(2) and (13) have connecting parts (11) for connecting the unit frames.
Further, the connecting portion (11) is a dovetail-shaped recess formed by an outward narrow portion (11a) and an inwardly enlarged portion (11b), and a substantially gourd-shaped key ( 20).

[0007]

The unit frame constructed as described above is connected to the side plate (12) and the side plate (13) of another adjacent unit frame by a connecting portion (11), and a plurality of, for example, six, are connected to one form frame. To form The connecting portion (11) has an outward narrow portion (11a) and an inward expanding portion.
(11b) and the substantially gourd-shaped key (20) fitted into these opposed concave portions, the unit frames can be easily connected to each other. However, this alone may cause relative displacement in the direction perpendicular to the face plate.In the present invention, the flange-shaped portion ( 1
4) and (14) are formed so as to extend, and the flange-shaped portion, which is linearly connected over a plurality of unit frames, is fixed to a common square member with a nail. That is, a wooden timber (30) is placed on the flanges (14) and (14), and is nailed with a nail (50) from a nail hole (31) made in the flange (14). The mold (K) shown in FIG. 2 is assembled. Then, at the construction site, as shown in FIG.
A long nail (51) is driven from the inside of (0) to connect adjacent formwork (K), (K).

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a unit frame (10) of the present invention for producing a rectangular fixed frame (K) having a width of 1800 mm and a length of 600 mm will be described below with reference to the drawings. As shown in (1), this unit frame is provided with a face plate (19) formed by melt-extruding a polypropylene resin, and the thickness of the face plate (19) is 4 mm as an example, which is the same as that of a conventional wood plywood. It is extremely thin compared to a thickness of 12 mm.

As is apparent from FIGS. 1 and 3, the unit frame (10)
Means that the long side is the length of the short side of the formwork (K) (600 m in this example).
m), the short side of which is the length of the long side of the formwork.
00 mm is 1 / integer, and in this case, 1/6 (300
mm).

[0010] On the back (R) of the face plate (19) of each unit frame (10),
In addition to the protruding ribs (15), (16), (17) and projections (18) to be described later being formed upright, an ant-shaped concave portion of an outward narrow portion (11a) and an inwardly expanding portion (11b) is formed. A connecting portion (11) consisting of a face plate facing from the back surface (R) to the front surface (H) and terminating short of the front surface.
(19), predetermined portions of the upper side plate (12) and the lower side plate (13) in FIG. In the case of this example, near the both ends and the center,
Is formed. The thickness of each rib is 4 mm as in the face plate, and the diameter of the projection (18) is 30 mmφ so that the hole (S) for inserting the end of the separator can be inserted.

[0011] A connecting portion in which the narrow portions (11a) of the side plates (12), (13) of the closely adjacent unit frames (10), (10) are aligned with each other and has a substantially gourd shape. A key (20) having the same shape is driven into (11) and (11), and the unit frames are connected to each other. This key has a cross-sectional shape in which two trapezoids are merged with each other on the short side. This key is an I-beam type or an H-steel type as shown in FIG. The side groove portion may be rounded, and furthermore, a pair of circular portions may be connected via a constricted portion as shown in FIG. 7, etc., and the central portion (21) is thin and both side portions (22), (22) ) May be any shape that can be said to be “substantially” a gourd-shaped shape that is symmetrical and spread.

Side plates (40), (4) projecting from the back surface of the face plate on the other opposite sides C, D sandwiched by the above-mentioned opposite sides A, B, that is, on the short side.
(0) is formed, and flanges (14), (14) are provided at the lower ends of the side plates (40), (40) and project outward and are aligned straight in a plane to which the face plate (19) belongs. Have been. And this collar
Wooden lumber (30) is placed on (14), (14), and is nailed with a nail (50) from a nail hole (31) drilled in the collar (14), as shown in FIGS. 1 and 2. The formwork (K) is assembled. Then, at the construction site, as shown in FIG. 8, a long nail (51) is driven from inside the side plate (40) to connect adjacent formwork (K), (K). .

On the back of the face plate, a straight convex rib (15), which is lower in height than the side plates (12) and (13) and is horizontal in FIG.
And the vertically oriented linear convex ribs (16) are arranged so as to reinforce each other, i.e., parallel to and intersect with either of the long and short sides. The area is provided with an area having no linear convex ribs, and in this area, six concentric convex ribs (17) and projections (18) are provided. The height of these convex ribs (15), (16) and (17) is 12 mm from the surface of the face plate in this embodiment. Face plate like this
The convex ribs formed in the middle part of the back surface of (19) are side plates (12),
(13), (40), by forming lower than (40), a long nail (51) is driven from inside the side plate (40) as shown in FIG. , (K) facilitates nailing work when connecting each other. These convex ribs (15), (16) do not necessarily need to be formed entirely lower than the side plate (40),
Wooden timber (3) placed on the collar (14) from the inside of the side plate (40)
It may be so formed that only the area where the convex rib does not interfere when the nailing is performed toward 0) is lowered.

Further, in this embodiment, a reinforcing rib (41) having the same height as the above-mentioned convex rib is formed also at the periphery and the center of the flange-shaped portion (14) formed at the outer lower portion of the side plate (40). The installation on the timber (30) is robust. Further, as shown in FIGS. 4A and 4B, one of the side plates (12) and (13), preferably both, is connected to the connection between the adjacent formwork (K) and (K). Holes used (12a),
(13a) is perforated. A C-shaped clip or the like is inserted into this hole to connect adjacent flanges. Therefore, this can be used to connect the unit frames (10).

The synthetic resin as the material of the unit frame (10) may be selected from appropriate ones having excellent releasability and durability, such as polypropylene resin, acrylic resin, polycarbonate resin or FRP. The mechanical strength characteristics of the material are also important, and from that point of view, the convex ribs (15) and (16) that are integral with the face plate extend linearly, and the convex rib (17) at the center draws a concentric circle. It is desirable that they are arranged as follows.

The unit frame has the conventional dimensions of a commonly used mold, that is, 600 mm long and 1800 mm wide (15 mm in civil engineering work).
It is desirable to have a size that is 1 / integer of (typically 00 mm). As an example, a unit frame having a length of 300 mm and a width of 600 mm and having six (or five) unit frames that can be arranged in a row and connected to each other, that is, a unit frame having a size of 1/6 (or 1/5) is advantageous. is there. This is because, in general, civil engineering works and the like often use dimensions that are multiples of 300 mm, and dimensional changes during construction are also often made in 300 mm units.

Therefore, the unit frame according to the present invention is, as described above, the connecting portion between the opposite sides in the vertical (or horizontal) direction.
(10) and fixing by means of square nails at the flanges (14) extending along the opposite sides in the horizontal (or vertical) direction and extending in a straight line over a plurality of unit frames. Is preferable. The key used in the connecting portion shown in the above embodiment is formed by cutting an appropriate metal extruded rod-shaped material such as an aluminum alloy or iron into required dimensions.

The connection between the unit frames by the connecting portion (11) is not limited to the above-described structure using the dovetail groove and the key.
For example, a flat plate-like portion of the side plates (12) and (13) can be used as a connecting portion by sandwiching the flat plate-like portion with a clip.

FIGS. 9 to 15 show unit frames in the present invention.
An embodiment in which the arrangement of the convex ribs (15) and (16) in the middle part of the back surface surrounded by the side plates (12), (13), (40), and (40) of (10) is slightly changed. In this embodiment, the ribs are formed in a substantially lattice shape by linear convex ribs. A portion of the convex ribs (15 '), (16') which are not in the way when nailing from the inside of the side plate (40) toward the wooden timber placed on the collar (14). ) Are formed at the same height as the side plates (12), (13) and (40). Of course, all convex ribs may be formed low.

Although the embodiments which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to only the structures of the embodiments, but has the constituent elements of the present invention and the object of the present invention. Is achieved, and the present invention can be implemented with appropriate modifications within a range in which the following effects can be obtained.

[0021]

[Effect of the Invention] The synthetic resin unit frame for the building formwork of the present invention is constructed as described above, so that it is lightweight, strong and durable, and various types of construction involving concrete casting work. It greatly contributes to improving the efficiency of civil engineering work.
In addition, since the synthetic resin face plate has good releasability of concrete, a beautiful concrete surface can be formed, and the conventional extra work of peeling off the adhered concrete is not required. A particularly important advantage is that, for example,
Compared to the case where a large mold such as 0 mm is integrally formed by injection molding, it is easy to manufacture because a mold of a fraction of the size is sufficient, and it is lightweight and compact, so it can be transported.
Easy to assemble and disassemble. Further, when connecting the unit frames, the connecting portion formed on the side plate has a dovetail-shaped recess formed by an outwardly narrow portion and an inwardly expanding portion, and a substantially gourd-shaped fitting which is fitted into the opposed recesses. The unit frames can be easily connected only by inserting the keys.

In addition, the normal formwork is liable to be damaged at both ends, especially at the corners by repeated use. In such a case, the entire formwork must be discarded. When combined to form a formwork,
It is economical because it is only necessary to replace the unit frame of the damaged part, and the work is easy because the size of the mold can be adjusted by the number of unit frames to be connected.

[0023] In addition, a side plate formed on the short side edge of the back surface of the face plate and a flange-like portion for mounting a wooden timber formed by projecting outward at a lower end portion of the side plate are formed. ,
When forming a formwork by combining a plurality of unit forms, a wooden piece of wood is placed on this flange and nailed and fixed, so that the entire formwork can be reinforced and a strong integrated connection can be achieved, and formed on the intermediate surface of the face plate In the area adjacent to the side plate of the short side portion, the formed convex rib is formed lower than the height of the side plate so as not to interfere when nailing from the inside of the side plate toward the wooden timber on the flange portion. Therefore, there are various effects such as an easy operation of connecting the mold frames by nailing.

[Brief description of the drawings]

FIG. 1 is an overall plan view of a mold formed by connecting unit frames according to an embodiment of the present invention.

FIG. 2 is a front view taken along the line II in FIG. 1;

FIG. 3 is an exploded perspective view showing a state in which two unit frames according to an embodiment of the present invention are butted and assembled.

4A is an enlarged plan view showing one unit frame of the embodiment, FIG. 4B is a front view taken along the line II-II in FIG. 4A, and FIG. 4) is a side view taken along line III-III in FIG.

FIGS. 5A and 5B are enlarged perspective views of main parts in a modified example.

6 (a) and 6 (b) are enlarged perspective views of main parts in a modified example.

FIGS. 7A and 7B are enlarged perspective views of main parts in a modified example.

FIG. 8 is a partially enlarged cross-sectional view when the molds are connected by nailing.

FIG. 9 is a plan view showing a second embodiment of the unit frame according to the present invention.

FIG. 10 is a front view of the second embodiment.

FIG. 11 is a side view of the second embodiment.

FIG. 12 is a sectional view taken along the line CC in FIG. 9;

FIG. 13 is a sectional view taken along the line DD in FIG. 9;

FIG. 14 is a sectional view taken along the line AA in FIG. 9;

FIG. 15 is a sectional view taken along the line BB in FIG. 9;

[Explanation of symbols]

 (10) Unit frame (11) Connecting part (11a) Narrow part (11b) Inwardly expanding part (12) Side plate (13) Side plate (14) Flange part (15) Convex rib (16) Convex rib (18 ) Protrusions (19) Face plate (20) Key (30) Wooden timber (40) Side plate (K) Synthetic resin formwork

Claims (1)

(57) [Scope of request for utility model registration] 1. An integrally molded product made of a synthetic resin material,
A rectangular face plate (19) having a size that is a fraction of the width of the formwork, and side plates (12) and (13) formed along the long side edge of the back surface of the face plate (19); Side plates (40), (40) formed on the short side edge of the back surface of the face plate (19), and a square material mounting formed by projecting outward at the lower end portions of the side plates (40), (40). Collar (1
4), (14) and a number of convex ribs (15), (16) formed on the back surface of the face plate surrounded by the side plates (12), (13), (40), (40). At least a part of the convex ribs (15), (16) is formed to be lower than the height of the side plate (40) in an area adjacent to the side plate (40) on the short side, and further, the face plate (19 The long side plates (12) and (13) are provided with connecting portions (11) for connecting the unit frames to each other, and the connecting portions (11) are further narrowed outward (11).
a) and a dovetail-shaped recess formed by the inwardly expanding portion (11b), and a substantially gourd-shaped key (20) fitted into the opposed recesses. Connection structure in unit frame.