JP2829565B2 - Plastic panel for concrete 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 concrete formwork panel used for producing a concrete structure such as an outer wall of a building by casting concrete, and more particularly to the use of a separator when assembling the formwork. And a plastic panel suitable for a concrete formwork.

[0002]

2. Description of the Related Art Conventionally, wooden panels, metal panels, and plastic panels are generally used as formwork panels used in concrete casting. Although wooden panels are lightweight and inexpensive, and are excellent in terms of ease of use, the panel surface is made of veneer plywood using tropical timber. It is a global problem from the point of view of protection and the like. Although metal panels are excellent in durability, they are easy to rust,
It is heavy and requires a great deal of labor to transport and install and remove. Therefore, in recent years, plastic panels have been used instead of wooden panels and metal panels. Plastic panels, unlike wooden panels, are less likely to rot and require less effort to repair. Moreover, it is lighter in weight than wooden panels and metal panels, and is excellent in workability.

FIG. 10 is a cross-sectional view of a principal part for explanation showing a mode of use of a conventional plastic panel. In the conventional panel, a side wall plate 3 is provided upright at four circumferential ends of a face plate 1 serving as a concrete casting surface, and a plurality of reinforcing ribs are appropriately provided inside the side wall plate 3 in parallel. At the time of assembling the formwork, the front end thread portion 9 of the separator 7 for spacing is inserted into the separator insertion hole 5 formed in a required portion of the face plate 1, and the face plate 1 side is supported by the cone 10. A base portion 13 of a fastening rod 11 is attached to a tip screw portion 9 protruding from the separator insertion hole 5.
By tightening screwed to the screw hole, the fastening rod 11
To the panel. The tip of the fastening rod 11 is passed through the through hole 17 of the backing plate 15 and the backing plate 1
5 is brought into contact with the outside of a flap material 19 disposed adjacent to the upper and lower sides of the fastening rod 11 and fastened by a nut 20 to assemble a concrete formwork.

[0004]

However, a conventionally used veneer plywood for forming a face panel of a wooden panel is a standard product having a thickness of 12 mm. On the other hand, the length of the separator distal threaded portion 9 to be used for assembly of the mold, the length of the threaded portion of the fastening lever base 13 which is screwed into the screw portion is formed in accordance with the thickness of the plywood . However, the thickness of the face plate 1 of the conventional plastic panel is 3 to 3 mm.
Since it is as thin as about 6 mm, the distal end surface of the screw portion 9 is
Cannot be tightened sufficiently. For this reason, standard products conventionally used cannot be used.

[0005] Further, since the face plate of the plastic panel is thin, if it is excessively tightened, there is a possibility that cracks may occur around the separator insertion hole 5. In particular, when the reinforcing ribs are not provided only by the four side wall plates,
Even if the reinforcing ribs are provided, if the spacing is too wide or the direction of the reinforcing ribs is different, there is a problem that the fastening is likely to be excessive. In addition, when removing the panel after the poured concrete has solidified, it must be pulled apart in parallel to the concrete surface, but it must have both sides of the panel, and because of the nature of plastic it is slippery, It cannot be held in a depressed state and cannot be pulled apart parallel to the concrete surface. Therefore, the separator insertion hole 5 was sometimes damaged by the screw portion 9 at the tip of the separator. In particular, there is a problem that the thinner the face plate 1 is, the more easily it is damaged.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of such current situation, be a thin face plate than plywood wood panels can be used in conventional separators, securely fastening the flap member by fastening rod It is an object to provide a plastic panel for concrete formwork that can be performed.

[0007]

In order to achieve the above object, a plastic panel for a concrete form according to the present invention is provided with side walls on four sides of a face plate and reinforcing ribs inside the side walls. For plastic panels,
A separator insertion hole is provided at an arbitrary position on the face plate, and the periphery of the separator insertion hole is surrounded by a frame rib,
The thickness of the face plate in the frame rib is increased, and an annular convex portion is provided on the periphery of the separator insertion hole. Preferably, the height of the frame rib is substantially the same as the height of the side wall plate. Further, the planar shape of the frame rib may be a circle, a polygon such as a square or a hexagon. That is,
The frame rib in the present invention may have a structure that continuously surrounds the periphery of the separator insertion hole.

As the plastic forming the panel, for example, polypropylene, polyester, polystyrene (PS), polycarbonate, ABS resin and the like can be used. These resins can be used alone or with a reinforcing material such as glass fiber or a filler such as talc, and are selected so as to obtain sufficient panel strength in consideration of desired bending strength, weight, and the like. Is done.

[0009]

The strength is improved by increasing the thickness of the plate inside the frame rib and providing an annular projection around the periphery of the separator insertion hole, thereby enabling the use of a separator for a wooden panel. Further, since the fluttering material comes into contact with the frame rib around the separator insertion hole, the attachment of the fluttering material by the fastening rod can be ensured.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 are plastic panels showing a first embodiment of the present invention. FIG. 1 is a plan view in which an upper half shows a side wall plate and a reinforcing rib side, and a rear view shows a lower half which shows a face plate side. 2 is a partially enlarged sectional view near the separator insertion hole. In the illustrated plastic panel, a side wall plate 23 is erected at a longitudinal side end of a rectangular face plate 21 serving as a concrete casting surface, and a side wall plate 2 is provided at a lateral side end.
5, the four peripheral edges of the face plate 21 are
A basin surrounded by 3,25 is formed. Inside the side wall plates 23 and 25, a plurality of reinforcing ribs 27 in the longitudinal direction connecting the side wall plates 25 and a plurality of reinforcing ribs 29 in the short direction connecting the side wall plates 3 are provided in parallel.

The reinforcing rib 27 at the center in the longitudinal direction and the reinforcing rib 29 are connected via a circular rib 30 as a frame rib. The height of the circular rib 30 is the reinforcing rib 27,
29 is substantially the same as that of the side walls 23 and 25. Thickness T ₁ of the face plate 21 of the panel like the thickness of conventional plastic panel, are formed in about 6 mm, the thickness T ₂ of the face plate 21 within the circular rib 30 is formed to be about 10mm ing. A separator insertion hole 31 is formed in the center of the circular rib 30, and an annular projection 33 is provided on the periphery of the separator insertion hole 31. Projection height T ₃ of the annular projection 33
Is set to about 2 mm, so that the entire thickness is formed to about 12 mm which is the same as the thickness of the veneer plywood of the conventional wooden panel (see FIG. 2).

FIG. 3 shows a second embodiment of the present invention, in which a part of a reinforcing rib is used as a frame rib. That is, the spacing between the reinforcing ribs 27 in the central portion in the longitudinal direction is reduced, the reinforcing ribs 27 are connected by parallel orthogonal ribs 35, and the reinforcing ribs 37 connecting the orthogonal ribs 35 on the opposite sides to each other; A reinforcing rib 39 for connecting the plates 25 is provided. Therefore, in this embodiment, the rectangular ribs 40, which form the frame ribs, are formed by the orthogonal ribs 35 and a part of the orthogonal ribs 35 and the reinforcing ribs 27. As described above, as long as the square rib 40 has a completely closed shape, a part of the square rib 40 and a part of another reinforcing rib may be used. The thickness of the face plate 21 inside the square rib 40 is increased, a separator insertion hole 31 is formed at the center, and an annular projection 33 is formed on the periphery of the separator insertion hole 31.
Is similar to that of the first embodiment, and a detailed description thereof will be omitted.

FIG. 4 further shows a third embodiment of the present invention. In this embodiment, a continuous polygonal shape is formed by the reinforcing ribs, and a part of the reinforcing ribs forming the polygonal shape is a frame rib surrounding the separator insertion hole. That is, in the figure, by connecting the zigzag-shaped reinforcing ribs 43 provided along the side wall plate 23 by the reinforcing ribs 45 parallel to the side wall plate 25, the hexagonal rib 47 is removed except for the portions in contact with the side wall plates 23, 25. It is formed continuously. Then, a separator insertion hole 31 is formed in the face plate 21 surrounded by an arbitrary hexagonal rib 47, and the thickness of the face plate 1 in the hexagonal rib 47 surrounding the separator insertion hole 31 is increased, and the separator An annular projection 33 is provided on the periphery of the insertion hole 31.
Is provided. Thus, the reinforcing ribs 43, 45
When the closed shape is formed continuously, any shape can be used as the frame rib in the present invention. Therefore, the closed shape of the frame rib can be an arbitrary polygon, and can be selected from any combination such as a shape obtained by combining a circle and a rhombus by connecting a circle vertically and horizontally.

Next, a method of using the panel having the above structure will be described with reference to FIG.
In the description, the front plate 21 of the panel is opposed to the front end thread portion 9 of the separator 7 for maintaining a space between the separator insertion holes 31, and the face plate 21 is supported by the cone 10. The fastening rod 11 is connected to the panel by screwing a screw hole of the base 13 of the fastening rod 11 into the tip screw part 9 protruding from the separator insertion hole 31 and tightening. At this time, the distal end surface of the base portion 13 of the fastening rod 11 comes into contact with the annular convex portion 33 having the same thickness as the conventional veneer plywood. Next, the tip of the fastening rod 11 is
Of the eyeglass washer 1
6 is brought into contact with the outside of a pipe flute 51 arranged adjacent to the upper and lower sides of the fastening rod 11 and fastened by a nut 20 to assemble a concrete formwork. Since the pipe butter 51 comes into contact with frame ribs such as the circular rib 30, the square rib 40, and the hexagonal rib 47, the pipe butter 51 is fitted with the eyeglass washer 16.
Is securely fixed.

Each of the panels in the above embodiment is provided with a non-slip member 53 and a handle portion 55. The anti-slip member 53 is buried in a cylindrical holding portion 57 formed integrally with a part of the reinforcing ribs 27, 43 and the like so that the front end thereof slightly projects from the side wall plates 23, 25 in a horizontal plane. The anti-slip member 53 is a rubber-like elastic body made of natural rubber, synthetic rubber, or elastomer.
As shown in FIG. 9, it is formed in a cylindrical body having a through hole 59 in the center. The provision of the through hole 59 at the center facilitates the embedding in the cylindrical holding portion 57 and provides a clearance when the upper surface of the non-slip member 53 is pressed, so that the upper surface is not damaged. As described above, when the anti-slip member 53 is provided, mutual slippage is prevented when the anti-slip member 53 is stored horizontally and stored, so that it does not easily slip down.

Incidentally, the number of the non-slip members 53 can be increased or decreased by changing the mounting position as required. Further, the cylindrical holding portion 57 into which the anti-slip member 53 is fitted may be formed independently, and may be provided at an appropriate position between the reinforcing ribs or between the reinforcing ribs and the side wall plate. The shape of the non-slip member is cylindrical,
It may be tape-shaped, rod-shaped, or spherical. In the case of a tape-shaped non-slip member, the reinforcing rib or the reinforcing rib may be fixed to the widened portion, and in the case of a rod-shaped or spherical anti-slip member, it may be attached by embedding in the widened portion of the reinforcing rib. Good.

The handle portion 55 has a handle hole 60 into which four fingers can be inserted by hollowing out the reinforcing rib 27 and the connecting rib 45 on the face plate 21 side.
1 (see FIG. 6). The handle portion 55 is reinforced by the convex portion 61 and can be easily held. The handle 5
Where and how many 5 are formed may be determined arbitrarily, and a single handle (not shown) independent of the reinforcing ribs may be provided. In this way, when the handle is provided, even a plastic panel which is slippery in nature can be securely held, and the work of carrying and attaching and detaching can be performed safely and easily.

On the other hand, a sealing surface 63 and a contact surface 65 are formed on the outer surfaces of the side wall plates 23 and 25. That is, as shown in FIG. 6 and FIG. 7, the reinforcing ribs 27 and 29 or the reinforcing ribs 43 are closed on the face plate 21 side and on the opposite side.
By forming the concave portion 67 open to the side, the outer edge of the outer surface on the side of the face plate 21 is a continuous sealing surface 63, and the outer surface of a horizontally adjacent portion of the concave portion 67 is a contact surface 65. A small recess 69 is formed in the contact surface 65, and a clip insertion hole 70 for inserting a pin of a fastening clip is formed in the small recess 69. The small recess 69 is also closed on the face plate 21 side. Further, the recess 67
In order to be able to use with wooden panels, nail holes 7
1 is drilled.

In the above embodiment, the recess 67 is formed to have a small width at the four corners. However, the width of the recess 67 can be arbitrarily determined, and the combination thereof is also free. Further, each of the concave portions 67 may have a closed shape on the side opposite to the face plate 21 side. In this case, the sealing surface is formed in parallel with the outer surface of the face plate 21 and the opposite side edges on the opposite side. In addition, the small recess 69 formed in the contact surface 65 may be omitted as appropriate. As described above, by forming the concave portions 67 on the outer side surfaces of the side wall plates 23 and 25, deformation during molding is prevented, and the sealing surface 63 and the contact surface 65 are formed. In addition to the above, the outer surface is pressed against the contact surface 65 at the time of connection, so that the overall sealing performance is further improved.

[0020]

As described above, in the plastic panel according to the present invention, the periphery of the separator insertion hole is surrounded by the closed frame rib, and the thickness of the inside of the frame rib is increased, and at the periphery of the separator insertion hole. Since the annular convex portion is provided, the portion where the separator insertion hole is formed is reinforced, and damage at the time of attachment and detachment is prevented. Further, since the thickness can be made equal to the thickness of the veneer plywood in the wooden panel, it is possible to use the conventional separator used in the wooden panel. Furthermore, by surrounding the separator insertion hole with the frame rib, the assembling of the flutter material is stabilized, and the fastening of the flutter material by the fastening rod can be reliably performed.

[Brief description of the drawings]

FIG. 1 is a plan view in which an upper half shows a side wall plate and a reinforcing rib side, and a lower half shows a rear view showing a face plate side.

FIG. 2 is a partially enlarged cross-sectional view near a separator insertion hole.

FIG. 3 is a partial plan view showing another embodiment.

FIG. 4 is a partial plan view showing still another embodiment.

FIG. 5 is an explanatory sectional side view showing a use state of the panel.

FIG. 6 is a cross-sectional view showing an upper half of a handle portion, and a lower half is a side view in a panel longitudinal direction.

FIG. 7 is a side view in a lateral direction.

FIG. 8 is a sectional view taken along line AA of FIG. 1;

FIG. 9 is a cross-sectional perspective view showing a mounting portion of a non-slip member.

FIG. 10 is an explanatory cross-sectional side view showing a usage state of a conventional plastic panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Face plate 23 Side wall plate 25 Side wall plate 27 Reinforcement rib 29 Reinforcement rib 30 Circular rib 31 Separator insertion hole 33 Annular convex part 35 Orthogonal rib 37 Reinforcement rib 39 Reinforcement rib 40 Square rib 43 Zigzag reinforcement rib 45 Reinforcement rib 47 Hexagonal rib 53 Sliding Stop member 55 Handle part 57 Cylindrical holding part 59 Through hole 60 Handle hole 61 Convex part 63 Seal surface 65 Contact surface 67 Recess 70 Clip insertion hole 71 Nail hole

Continued on the front page (72) Inventor Fumio Otsuka 1 Nobesawa, Kaisei-cho, Ashigara-gun, Kanagawa Prefecture Inside the Meiji Rubber Chemicals Kanagawa Plant (72) Inventor Noriyoshi Maruyama 2-9-1-1, Tobita-Kita, Chofu-shi, Tokyo Kashima Construction Co., Ltd.Technical Laboratory (72) Inventor Yoshikazu Takei 2-9-1-1, Tobita-Shi, Chofu-shi, Tokyo Kashima Construction Co., Ltd.Technical Laboratory (72) Inventor Mikao Kobayashi 2--19, Tobita-Shi, Chofu-shi, Tokyo No. 1 Kashima Construction Co., Ltd. Technical Research Institute (72) Inventor Shigeo Watanabe Kashima Construction Co., Ltd. Technical Research Laboratories 2-9-1, Tobita-shi, Chofu-shi, Tokyo No. 2-7 Kashima Construction Co., Ltd. (56) References JP-A-6-193260 (JP, A) JP-B-51-49493 (JP, B2) JP-B-59-53979 (JP, B2) (58) ) Surveyed field (Int.Cl. ⁶ , DB name) E04G 9/05

Claims (4)

(57) [Claims] 1. A plastic panel in which a side wall plate is provided on four sides of a face plate and a reinforcing rib is provided inside the side wall plate, a separator insertion hole is provided at an arbitrary position of the face plate, and a periphery of the separator insertion hole is provided. A plastic panel for a concrete formwork, wherein the panel is surrounded by a frame rib, the thickness of a face plate in the frame rib is increased, and an annular convex portion is provided on a periphery of a separator insertion hole. 2. The plastic panel for a concrete formwork according to claim 1, wherein the height of the frame rib is substantially the same as the height of the side wall plate. 3. The plastic panel for a concrete formwork according to claim 1, wherein a planar shape of the frame rib is circular. 4. The plastic panel for a concrete formwork according to claim 1, wherein a planar shape of the frame rib is a polygon.