JPH0860861A - Panel made of plastic for concrete form - Google Patents

Abstract

PURPOSE: To prevent damage at the time of mounting and dismantling by surrounding the periphery of a separator inserting hole by a closed frame rib and forming an annular projecting section to the periphery of the frame rib and reinforcing the frame rib. CONSTITUTION: Sidewall boards 23 are disposed upright at side ends in the longitudinal direction of a face board 21 and sidewall boards 25 at side ends in the short direction respectively and the four peripheries of the face board 21 are surrounded, and a plurality of reinforcing ribs 27 in the longitudinal direction and a plurality of reinforcing ribs 29 in the short direction are formed in parallel on the insides of both sidewall boards 23, 25 respectively. The reinforcing ribs 27 at central sections in the longitudinal direction and the reinforcing ribs 29 are connected through circular ribs 30 as frame ribs, and the height of the circular ribs 30 is formed approximately flush with the reinforcing ribs 27, 29, and formed in the same horizontal surface as the sidewall boards 23, 25. Separator inserting holes 31 are bored at the central sections of the circular ribs 30, and annular projecting sections 33 are formed to the peripheries of the holes 31, thus increasing strength while allowing the usage of a separator for a panel made of wood.

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 placing concrete, and more specifically, to use a separator for assembling the formwork. The present invention relates to a plastic panel suitable for concrete formwork.

[0002]

2. Description of the Related Art Conventionally, wooden panels, metal panels, and plastic panels have been generally used as formwork panels used for pouring concrete. Although wooden panels are lightweight, inexpensive, and easy to use, the panel surface is made of plywood using tropical timber, and the cutting of tropical timber prevents global warming and prevents wild animals. It has become a global problem in terms of protection of the world. Although the metal panel is excellent in durability, it easily rusts,
It is heavy and requires a great deal of labor for transportation and installation and removal. Therefore, in recent years, plastic panels have been used in place of wooden panels and metal panels. Unlike wooden panels, plastic panels do not rot easily and do not require repair. In addition, it is lighter in weight than wooden panels and metal panels and has excellent workability.

FIG. 10 is a cross-sectional view of an essential part for explaining a usage mode of a conventional plastic panel. In a conventional panel, side wall plates 3 are provided upright at four peripheral ends of a face plate 1 which is a surface for placing concrete, and a plurality of reinforcing ribs are appropriately provided in parallel inside the side wall plates 3. Then, at the time of assembling the form, the tip screw portion 9 of the separator 7 for spacing is inserted into the separator insertion hole 5 formed at a required position of the face plate 1 and the face plate 1 side is supported by the cone 10. The foam tie 11 is coupled to the panel by screwing the screw hole of the base portion 13 of the foam tie 11 into the tip screw portion 9 protruding from the separator insertion hole 5 and tightening. Form Tie 1
The tip portion of No. 1 is penetrated into the through hole 17 of the pad plate 15, and the pad plate 15 is brought into contact with the outside of the flap material 19 arranged adjacent to the upper and lower sides of the foam tie 11 and tightened with the nut 20 to concretize the concrete. Assemble the formwork.

[0004]

However, the veneer plywood which forms the face plate of the wooden panel which has been conventionally used has a standard thickness of 12 mm. On the other hand, the length of the separator tip screw portion 9 used for assembling the mold and the length of the screw portion of the foam tie base portion 13 screwed to this screw portion are formed according to the plate thickness of the veneer plywood. . However, since the face plate 1 of the conventional plastic panel has a thin plate thickness of about 3 to 6 mm, the tip end surface of the screw portion 9 abuts against the inside of the screw portion of the base portion 13 and cannot be sufficiently tightened. For this reason, it is not possible to use standard products that have been conventionally used.

Further, since the face plate of the plastic panel is thin, if it is tightened excessively, there is a possibility that cracks may occur around the separator insertion hole 5. Especially when the reinforcing ribs are not provided only on the four side wall plates,
Even if the reinforcing ribs are provided, if the spacing is too wide or the direction with respect to the flap material is different, there is a problem that tightening tends to be excessive. In addition, when removing the panel after the cast concrete has solidified, it must be pulled apart in parallel to the concrete surface, but both sides of the panel must be held, and due to the slippery nature of plastic, it is stable. It cannot be held in the closed state and cannot be separated parallel to the concrete surface. Therefore, the screw part 9 at the tip of the separator may damage the separator insertion hole 5. In particular, there is a problem that if the face plate 1 is thin, the face plate 1 is easily damaged.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is possible to use a conventional separator even if the face plate is thinner than the veneer plywood of a wooden panel, and securely tighten the butter material with a foam tie. 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 concrete formwork according to the present invention is provided with side wall plates on four sides of a face plate and reinforcing ribs inside the side wall plate. In plastic panels,
A separator insertion hole is provided at an arbitrary position of the face plate, and the periphery of the separator insertion hole is surrounded by a frame rib,
It is characterized in that the face plate in the frame rib is made thicker and an annular convex portion is provided on the peripheral edge of the separator insertion hole. It is desirable that the height of the frame rib is substantially the same as the height of the side wall plate. The planar shape of the frame rib may be circular or polygonal such as quadrangular and hexagonal. 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 or the like can be used. Then, these resins can be used alone or together 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. To be done.

[0009]

By increasing the plate thickness in the frame ribs and providing the annular projection on the peripheral edge of the separator insertion hole, the strength is improved and the separator for the wooden panel can be used. Further, since the flap material comes into contact with the frame rib around the separator insertion hole, it is possible to securely attach the flap material with the foam tie.

[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, in which the upper half is a plan view showing the side wall plate and the reinforcing rib side, and the lower half is a rear view showing the 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 side end in the longitudinal direction of a rectangular face plate 21 which is a surface for placing concrete, and a side wall plate 2 is provided at a side end in the lateral direction.
By arranging 5 vertically, the four peripheral edges of the face plate 21
It forms a basin surrounded by 3,25. Inside the side wall plates 23, 25, a plurality of longitudinal reinforcing ribs 27 connecting the side wall plates 25 and a plurality of short side reinforcing ribs 29 connecting the side wall plates 3 are provided in parallel.

The reinforcing ribs 27 and 29 at the central portion in the longitudinal direction are connected via a circular rib 30 which is a frame rib. The height of the circular rib 30 is the reinforcing rib 27,
It is substantially the same as 29 and forms the same horizontal plane as the side wall plates 23 and 25. The plate thickness T ₁ of the face plate 21 of this panel is formed to be about 6 mm like the plate thickness of the conventional plastic panel, but the plate thickness T ₂ of the face plate 21 in the circular rib 30 is formed to be about 10 mm. ing. A separator insertion hole 31 is formed at the center of the circular rib 30, and an annular convex portion 33 is provided on the peripheral edge of the separator insertion hole 31. Projection height T ₃ of the annular convex portion 33
Is about 2 mm, so that the overall thickness is 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 the reinforcing rib is used as a frame rib. That is, the space between the reinforcing ribs 27 in the central portion in the longitudinal direction is narrowed and connected by the parallel orthogonal ribs 35, and further, the reinforcing ribs 37 that connect the orthogonal ribs 35 on the opposite sides, and the orthogonal ribs 35 and the side wall. Reinforcing ribs 39 that connect the plates 25 are provided. Therefore, in this embodiment, the orthogonal ribs 35 and the rectangular ribs 40 forming frame ribs are formed by the orthogonal ribs 35 and a part of the reinforcing ribs 27. As described above, the rectangular rib 40 may use a part of the rectangular rib 40 and a part of another reinforcing rib as long as the rectangular rib 40 has a closed shape. In addition, the plate thickness of the face plate 21 inside the quadrilateral rib 40 is increased, a separator insertion hole 31 is formed in the center portion, and an annular convex portion 33 is formed on the periphery of the separator insertion hole 31.
Since the point of providing is similar to that of the first embodiment, its detailed description is omitted.

FIG. 4 further shows a third embodiment of the present invention. In this embodiment, continuous polygonal shapes are 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 reinforcing ribs 43 provided along the side wall plates 23 by the reinforcing ribs 45 parallel to the side wall plates 25, the hexagonal ribs 47 are 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 plate thickness of the face plate 1 inside the hexagonal rib 47 enclosing the separator insertion hole 31 is increased, and the separator is formed. An annular convex portion 33 is provided on the periphery of the insertion hole 31.
Is provided. In this way, the reinforcing ribs 43, 45
When the closed shape is continuously formed by, any shape therein can be used as the frame rib in the present invention. Therefore, the closed shape of the frame rib can be any polygonal shape, and can be selected from any combination such as a shape in which a circle is continuous in the vertical and horizontal directions and a combination of a circle and a rhombus.

Next, FIG. 5 shows a method of using the panel having the above structure.
In the following description, the face plate 21 of the panel is made to face each other, the tip screw portion 9 of the separator 7 for spacing is inserted into the separator insertion hole 31, and the face plate 21 side is supported by the cone 10. The form tie 11 is joined to the panel by screwing the screw hole of the base portion 13 of the foam tie 11 into the tip screw portion 9 protruding from the separator insertion hole 31 and tightening. At this time, the base 1 of the foam tie 11
The tip surface of 3 abuts on an annular convex portion 33 having the same thickness as that of a conventional plywood plywood. Then, the foam tie 11
The front end of the eyeglass washer 16 is passed through the through hole 18 of the eyeglass washer 16, and the eyeglass washer 16 is brought into contact with the outside of the pipe butter 51 arranged adjacent to the upper and lower sides of the foam tie 11 and is tightened by the nut 20 to tighten the concrete formwork. Assemble. Since the pipe butter 51 abuts on the frame ribs such as the circular rib 30, the square rib 40, and the hexagonal rib 47,
The pipe flap 51 is securely fixed by the eyeglass washer 16.

Each of the panels in the above embodiments is provided with a non-slip member 53 and a grip portion 55. The anti-slip member 53 is embedded in a cylindrical holding portion 57 that is integrally formed with a part of the reinforcing ribs 27, 43 and the like so that the tip end thereof slightly projects from the side wall plates 23, 25 in the horizontal plane. The anti-slip member 53 is a rubber-like elastic body made of natural rubber, synthetic rubber or elastomer.
And, as shown in FIG. 9, it is formed in a cylindrical body having a through hole 59 in the central portion. Providing the through hole 59 in the central portion facilitates embedding in the cylindrical holding portion 57, and serves as a clearance when the upper surface of the anti-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 sheets are horizontally stacked and stored, so that they do not easily slip off.

The anti-slip members 53 can be increased or decreased in number by changing their mounting positions as needed. 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 such as between the reinforcing ribs or between the reinforcing ribs and the side wall plate. In addition to the cylindrical shape of the anti-slip member,
It may be tape-shaped, rod-shaped, or spherical. In the case of a tape-shaped non-slip member, it may be fixed to the reinforcing rib or the widened portion of the reinforcing rib. Good.

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

On the other hand, a seal surface 63 and a contact surface 65 are formed on the outer side surfaces of the side wall plates 23 and 25. That is, as shown in FIG. 6 and FIG. 7, the reinforcing ribs 27, 29 or the reinforcing ribs 43 are closed on the side of the face plate 21 and on the opposite side.
By forming the recessed 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 the horizontally adjacent portion of the recessed 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 the pin of the binding 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
Nail holes 7 to allow the use with wooden panels
1 is provided.

In the above embodiment, the recess 67 is formed to have a small width at the four corners, but the width dimension of the recess 67 can be arbitrarily determined and the combination thereof can be freely selected. Further, each of the recesses 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 side and the opposite side edge portions on the opposite side. Further, the small recess 69 formed in the contact surface 65 may be omitted as appropriate. As described above, the recesses 67 are formed on the outer side surfaces of the side wall plates 23 and 25 to prevent deformation at the time of molding, and the sealing surface 63 and the contact surface 65 are formed, so that the edge portions on the side of the face plate 21 can be securely attached. In addition, since the outer surface is pressed against the contact surface 65 at the time of connection, the overall sealing property 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 a closed frame rib, and the plate thickness in the frame rib is increased, and the peripheral edge of the separator insertion hole is formed. Since the annular projection is provided, the portion where the separator insertion hole is formed is reinforced, and damage during attachment and detachment is prevented. Also, since the thickness of the veneer plywood in the wooden panel can be made equal, it is possible to use the conventional separator used in the wooden panel. Further, by surrounding the separator insertion hole with the frame rib, the assembly of the flap material is stabilized, and the flap material can be securely tightened by the foam tie.

[Brief description of drawings]

FIG. 1 is a plan view showing an upper half on a side wall plate and a reinforcing rib side, and a lower half is 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 another embodiment.

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

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

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

8 is a cross-sectional view taken along the line AA of FIG.

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

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

[Explanation of symbols]

 21 face plate 23 side wall plate 25 side wall plate 27 reinforcing rib 29 reinforcing rib 30 circular rib 31 separator insertion hole 33 annular convex portion 35 orthogonal rib 37 reinforcing rib 39 reinforcing rib 40 square rib 43 zigzag reinforcing rib 45 reinforcing rib 47 hexagonal rib 53 sliding Stopping member 55 Handle portion 57 Cylindrical holding portion 59 Through hole 60 Handle hole 61 Convex portion 63 Seal surface 65 Contact surface 67 Recessed portion 70 Clip insertion hole 71 Nail hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Fumio Otsuka, No. 1 Nobezawa, Kaisei-cho, Ashigarashami-gun, Kanagawa Prefecture Meiji Rubber Kasei Kanagawa Plant (72) Noriyoshi Maruyama No. 19-1, Tobita, Chofu-shi, Tokyo Kashima Construction Co., Ltd. Technical Research Institute (72) Inventor Yoshikazu Takei 2-19-1 Tobita, Chofu-shi, Tokyo Kashima Construction Co., Ltd. Technical Research Institute (72) Inventor Migameo Kobayashi Tokyo, Chofu City Tobita 19-21 No. 1 Kashima Construction Co., Ltd. Technical Research Institute (72) Inventor Shigeo Watanabe No. 19-1 Tobita, Chofu, Tokyo Metropolitan Government Kashima Construction Co., Ltd. Technical Research Institute (72) Inventor Hiroshi Kitano 1-2-2 Moto-Akasaka, Minato-ku, Tokyo No. 7 Kashima Construction Co., Ltd.

Claims (4)

[Claims] 1. A plastic panel comprising four side wall plates provided with side wall plates and reinforcing ribs inside the side wall plates, wherein 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 concrete formwork, characterized in that it is surrounded by a frame rib, the face plate in the frame rib is made thicker, and an annular convex portion is provided on the periphery of the 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 concrete formwork according to claim 1, wherein the plane shape of the frame rib is circular. 4. The plastic panel for concrete formwork according to claim 1, wherein the planar shape of the frame rib is polygonal.