JP3002702U - Retainer for concrete formwork - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a holder for a concrete form plate that is easy to hold and can be easily removed by connecting a plurality of form plates so that they can be connected vertically and horizontally. . [Structure] A gap holding piece 1 comprising a gap holding main body piece 10 having a length of concrete width to be placed and an ear piece 17, the gap holding main body piece 10 having both sides of a flat plate portion 12 having a reinforcing rib 11 in the center. Upper and lower bent pieces 13 and 14 are formed in the portion, and an ear piece 17 is connected to the center portion of both ends of the distance maintaining body piece 10 via a narrow connecting portion 15. The ear piece 17 is provided with a wedge hole 18 at the axial center at a substantially equal distance from the connecting portion 15 and the outer edge of the ear piece 17. The wedge piece 2 has abutting projections 21 and 22 projecting inward from the upper and lower portions thereof, and an inclined edge 23 so that the outer edge is narrowed downward.
Is made. The wedge piece 2 is inserted into the elongated hole 31 of the form frame plate 3 arranged opposite to the wedge hole 18 of the ear piece 17 protruding outward.
Is inserted from above and the form frame plate 3 is held.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete formwork plate holder which is inserted into elongated holes of concrete formwork plates arranged opposite to each other and holds the formwork plates mutually.

[0002]

[Prior art]

 Conventionally, this type of concrete formwork has been screwed from both sides of the formwork with spacer cones or the like, but it is well known that it is extremely troublesome. Therefore, as shown in FIG. In some cases, the ends of the gap holding pieces with the wedge holes 91 provided from the inside are projected to the outside, and then the wedge pieces 90 are inserted into the wedge holes to hold the formwork plate, but this is easy to assemble. However, there was a problem that it took a lot of time to remove the formwork plate after placing concrete.

[0003] Therefore, in order to make it easy to remove the form plate by twisting off the end ear pieces protruding to the outside of the concrete form plate after drying the concrete, Japanese Patent Application No. 6-1102 has a narrow and short width. An ear piece 93 is provided in series through a thin connecting portion 92. As a result, the ear pieces 93 can be easily removed and the form plate can be quickly removed. However, when the form plate is continuously connected vertically and horizontally, the connecting plate portion is a superposition connection of a plurality of plates. Therefore, when the wedge piece 90 is used as shown in FIG. 7, the wedge hole 91 needs to be transparently provided up to the vicinity of the connecting portion 92 as shown in FIG. It is conceivable that the ear piece 93 may sometimes be missing.

[0004]

[Problems to be solved by the device]

 In view of this, the present invention can easily prevent the strength deterioration even when the opposite mold plates are held and the mold plates are assembled, especially when a plurality of plates are connected in order to connect the mold plates vertically or horizontally so that they can be quickly connected. It is an object of the present invention to provide a concrete mold plate holder that is easy to remove and easy to remove, and is easy to operate.

[0005]

[Means for Solving the Problems]

 For this reason, the present invention is used by inserting it into the narrow holes of the concrete formwork plates arranged facing each other, and at each end of the thin-walled space maintaining main body piece having the length of the concrete width to be placed, with a narrow width. A thin ear piece is continuously connected through a short thin connecting part, and at the same time, an interval holding piece with a wedge hole provided at a position apart from the connecting part of the ear piece is contacted with the upper and lower parts. A concrete formwork having a projecting portion projecting inward and a wedge piece inserted into and locking the ear piece formed as an inclined edge so that the outer edge is narrowed downward. It is a plate holder. It is also possible to dispose connecting parts at the central portions of both ends of the space-maintaining piece and connect the ear pieces in series, and form a wedge hole along the longitudinal axis. A wedge hole may be pierced through the ear piece at approximately the same distance from the edge.

[0006]

[Action]

 According to the first aspect of the present invention, the wedge pieces are inserted into the elongated holes of the concrete formwork plates arranged opposite to each other so that the selvage-holding piece's ear pieces protrude outside the formwork board, and the wedge pieces are inserted into the wedge holes of the earpiece. The slanted edges of the wedge pieces come into contact with the holes, and the upper and lower abutting projections of the wedge pieces press into contact with the form plate, so that the spacing holding pieces are fixed and the opposite form plate is held. . At this time, even if a plurality of formwork plates are superposed for connecting vertically and horizontally, they are held by pressing the wedge pieces. In this case, since the wedge hole is transparently provided at a position apart from the connecting portion in the ear piece, the strength of the ear piece is not weakened. After the concrete is dried, remove the wedge pieces, and twist the protruding ear pieces to remove the ear pieces from the narrow joint, so the form plate may be removed.

According to the second aspect of the present invention, since the selvage-maintaining body pieces are provided with the selvages at the central portions of both ends thereof, the wedge piece can be stably mounted and the selvage-storing piece can be easily twisted. . Further, according to claim 3, the strength of the ear piece is optimized and the durability is excellent, and there is no fear that the ear piece may be lost during use.

[0008]

【Example】

 Hereinafter, details of the present invention will be described with reference to illustrated embodiments. The present example shown in FIG. 1 is a spacing holding piece 1 composed of a spacing holding body piece 10 having a length of a concrete width to be placed and an ear piece 17, and the spacing holding body piece 10 has a reinforcing rib 11 at the center. The flat plate portion 12 has vertical bending pieces 13 and 14 formed on both sides thereof, and an ear piece 17 is connected to a center portion of both ends of the spacing main body piece 10 via a connecting portion 15. .

The space-maintaining body piece 10, the connecting portion 15 and the ear piece 17 are formed by punching and bending one thin metal piece, and the space-maintaining body piece 10 has a length of about 600 mm and a width of about 20 mm. is there. In addition, a wedge hole 18 is formed in the ear piece 17 at the axial center thereof at substantially the same distance from the connecting portion 15 and the outer edge of the ear piece 17. The length of the wedge hole 18 is about 12 mm.

Reference numeral 2 is a wedge piece, and abutting projections 21 and 22 are provided on the upper and lower portions so as to project inward, and at the same time, an outer edge is formed downward and an inclined edge 23 is formed so as to be narrowed. ing. The lower end has a width of about 11 mm so that it can be inserted into the wedge hole 18, and the upper end has a width of about 25 mm, and the width between the upper and lower abutting projections 21 and 22 is an inclined shape of 9 to 12 mm.

Explaining the use of this example, as shown in FIGS. 2 and 3, the ear pieces 17 of the spacing holding piece 1 are inserted into the elongated holes 31 of the concrete formwork plates 3 arranged to face each other and the earpieces 17 of the space holding pieces 1 are respectively formed into the formwork plates 3. To project out of. Then, by inserting the wedge piece 2 into the wedge hole 18 of the ear piece 17 from above, the inclined edge 23 of the wedge piece 2 is brought into contact with the rear end of the wedge hole 18, and the upper and lower abutting protrusions of the wedge piece 2 are brought into contact. By pressing the parts 21 and 22 against the form plate 3, the space holding piece 1 is fixed, and the form plate 3 which is opposed by the rising end faces of the bent pieces 13 and 14 of the space holding body piece 10 is held. is there.

At this time, as shown in FIGS. 3 and 4, even when the two mold plates 3 are overlapped for connecting vertically and horizontally, the wedge holes 18 are exposed as shown in FIG. 2 can be inserted, and the mold plate 3 is held by pressing the wedge piece 2 against the mold plate 3 on the outside. In this case, since the wedge hole 18 is provided at a position away from the connecting portion 15 and at the same distance from the outer end edge of the ear piece 17, the strength of the ear piece 17 does not become weak, and the wedge piece 2 does not lose its strength. It does not break when inserted.

After the concrete is dried, the wedge piece 2 is removed from the wedge hole 18, and then the protruding ear piece 17 is twisted around as shown by the phantom line in FIG. After removing the piece 17, the form plate 3 may be removed.

As described above, according to this embodiment, the wedge pieces 2 are inserted into the elongated holes 31 of the concrete formwork plates 3 arranged to face each other, the ear pieces 17 at both ends thereof are projected outward, and the wedge pieces 2 are inserted into the wedge holes 18. Since it is possible to secure the space between the formwork materials 3 and hold them, even if a plurality of formwork plates 3 are overlapped because they are connected vertically and horizontally, the wedge piece 2 to the wedge hole 18 that is exposed for the entire length is It is possible to easily hold a plurality of mold materials 3 by inserting them. Then, after the concrete is dried, the ear piece 17 is twisted and turned, so that the ear piece 17 is lost, so that the mold plate 3 may be removed.

Further, since the ear pieces 17 are continuously provided at the center portions of both ends of the spacing main body piece 10, the wedge piece 2 is stably attached, and the ear pieces 17 can be easily twisted. You can. In addition, when the number of the mold members 3 to be held is one, the ear members 17 are twisted at a right angle without inserting the wedge members 2 like some of the interval holding members in FIG. May be retained by locking.

Although this example is configured as described above, the present invention is not limited to this. For example, the space maintaining body piece, the connecting portion, and the ear piece may have any shape, and may be made of metal or plastic having high strength. The connecting position of the connecting portion and the ear piece is not limited, and the penetrating position of the wedge hole may be a position apart from the connecting portion. The length and width of the concrete are also appropriate depending on the width of the concrete to be placed. Further, the shape and material of the wedge piece are not limited, but the contact projections are provided on the upper and lower parts so as to project inward, and the outer edges are inclined edges so that the width becomes narrower downward. Good. The material and composition of the concrete form board to be held are arbitrary.

[0017]

[Effect of device]

 According to claim 1 of the present invention, by inserting the wedge pieces into the wedge holes of the protruding ear pieces by inserting the wedge pieces into the elongated holes of the concrete formwork plates arranged opposite to each other, a space between the formwork materials can be secured and held. Even if multiple formwork plates are stacked due to the vertical and horizontal connection, the effect of easily holding multiple formwork materials by inserting the wedge pieces into the exposed wedge holes is great. Since it is easy to remove, the form plate can be easily removed.

In the second aspect, since the selvage-maintaining body pieces are provided with the selvages at the central portions of both ends thereof, the wedge pieces can be stably attached, and the selvage-separating pieces can be easily twisted. . According to the third aspect, the strength of the ear piece is optimized and the durability is excellent, and there is no fear that the ear piece may drop during use.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of an embodiment of the present invention.

FIG. 2 is a perspective view of an essential part of a concrete formwork according to an embodiment of the present invention in an assembled state.

FIG. 3 is a perspective view showing a state of connection to a concrete formwork assembled vertically by assembling according to an embodiment of the present invention.

FIG. 4 is an enlarged vertical cross-sectional view in which the holding state is partially cut away.

FIG. 5 is a plan view of the holding state.

FIG. 6 is a partially cutaway vertical cross-sectional view with the form plate removed.

FIG. 7 is an enlarged vertical cross-sectional view showing a wedge piece inserted by a conventional spacing member.

FIG. 8 is a plan view of an essential part showing a form in the middle of devising.

[Explanation of symbols]

 1 Interval Holding Piece 10 Interval Holding Main Body Piece 13, 14 Bending Piece 15 Connecting Part 17 Ear Piece 18 Wedge Hole 2 Wedge Piece 21, 22 Abutting Projection 23 Sloping Edge 3 Form Frame 31 Elongated Hole

Claims (3)

[Scope of utility model registration request] 1. A thin and short thin-walled piece which is inserted into narrow slots of concrete formwork plates arranged opposite to each other, and is provided at both ends of each thin-walled space maintaining main body piece having a length of concrete width to be placed. Through the connecting portion, thin ear pieces are integrally connected to each other, and a spacing holding piece having a wedge hole formed at a position apart from the connecting portion in the ear piece, and a contact protrusion on the upper and lower portions. A concrete formwork that is provided with a wedge piece that protrudes toward the inner side and that is inserted into and locked in the ear piece that is formed as an inclined edge so that the outer edge is narrowed downward. Plate holder. 2. The selvage-maintaining body piece 10 is provided with a connecting portion 15 at the center of both ends thereof, and an ear piece 17 is continuously provided, and a wedge hole 18 along the longitudinal axis is provided through the ear piece 17. Item 1. The holder of Item 1. 3. The holder according to claim 1, wherein a wedge hole 18 is provided in the ear piece 17 at substantially the same distance from the outer edge of the connecting portion 15 and the ear piece 17.