JPH0640269Y2 - Concrete formwork - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a concrete formwork.

[Prior Art] For example, a formwork used for placing cloth-based concrete has webs, ribs, and a reinforcing rod on both upper and lower edges of the face plate opposite to the concrete forming surface. For this reason, there is a problem that concrete tends to adhere to the concave portion formed by the face plate and the web and ribs of the lower casing during concrete pouring, and when it solidifies, the weight increases and handling becomes difficult. Therefore, it is necessary to remove the adhering concrete, but as described above, there is also a problem that the work of removing the concrete in the recess is naturally time-consuming.

In order to solve the above-mentioned problems, it is known that an anti-adhesion portion is bent from the edge of the rib of the lower cauldron toward the face plate, or an anti-adhesion member is fitted into the lower cauldron and fixed by welding. There is.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional mold, in which the ribs have the adhesion preventing portions bent, the thickness of the adhesion preventing portions is the same as the thickness of the face plate, and There is a problem that the weight increases. Also, since it is thick, bending work was not easy. Further, there is also a problem that the mold having the adhesion preventing member fitted therein requires a welding process, which makes the manufacturing process troublesome.

The present invention has been made to solve the above problems, and an object thereof is to provide a concrete formwork which has a concrete adhesion preventing structure, is lightweight, and can be easily manufactured.

[Means for Solving the Problems] In order to achieve the above-mentioned object, in the present invention, in the upper and lower end portions of a face plate whose outer surface is a flat concrete-molded surface,
A web facing the opposite side of the concrete forming surface and a rib bent so as to face each other vertically are provided at the tip of this web, and the upper and lower stalks are formed by these webs and ribs, and the inner surface of the lower slat is formed. In addition, a main body formed of a steel plate thinner than the face plate is provided as a whole so as to cover the inner surface of the lower shell by preventing the adhesion of concrete to the inner surface of the lower shell, which is inclined toward the rib side. The back surface of the face plate is provided for reinforcement and the like, and the lower end portion holds down the adhesion preventing member by the member having a shape corresponding to the shape of the main body of the adhesion preventing member so as not to come off from the lower stem.

[Operation] Therefore, according to this invention, the adhesion prevention member is fitted in the lower shell formed by the web and the ribs, and the columnar ribs or the support angles are welded and fixed to the predetermined positions on the back side of the face plate to prevent the adhesion. The member can be fixed to the lower shell. Further, the concrete dropped on the adhesion preventing member at the time of pouring the concrete can be easily removed, and the adhesion preventing member is surely pressed and held by the columnar ribs or the supporting angles.

[Embodiment] An embodiment embodying the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 to 8, webs 2a and 3a are formed on the upper and lower edges of the face plate 1 made of steel plate forming the concrete forming surface 1a in the opposite direction to the concrete forming surface 1a, respectively. Ribs 2b and 3b are bent at the tip of the web so as to face each other vertically, and the webs 2a and 3a and ribs 2b and 3b are bent.
Thus, a horizontal L-shaped upper sleeve 2 and a lower sleeve 3 are formed.
Then, on both left and right edges of the face plate 1, side groves 4 and 5 made of square pipes.
Is stuck.

As shown in FIGS. 1 and 3, a support angle 6 having a guide hole 6a is welded to the back surface of the face plate 1 in the vicinity of the side sleeve 4, and a through hole 4a is formed in the side sleeve 4. A pair of upper and lower connecting fittings 7 composed of a pin 7a and a holding tool 7b for connecting another formwork adjacent to each other are supported between the support angle 6 and the side wall 4. An insertion hole into which the connecting metal fitting pin 7a of another adjacent mold is connected and inserted into the other side shell 5
5a is formed. On the back surface of the face plate 1, a plurality of reinforcing columnar ribs 8 made of a steel plate having a stepped mountain cross section are fixed at equal intervals (4 in the embodiment).

As shown in FIGS. 1, 2, and 8, an adhesion preventing member 9 for preventing adhesion of concrete to the inner surface of the lower cauldron 3 is fitted between the both lateral grooves 4 and 5. As shown in FIGS. 2 and 8, the anti-adhesion member 9 is made of a steel plate thinner than the face plate 1. The adhesion preventing member 9 is composed of a main body 9a and a pair of legs 9b and 9c bent on both side edges of the main body 9a. The main body 9a has a reinforcing step formed in the substantially central portion thereof, and is inclined downward toward the rib 3b as a whole.

Further, the lower ends of the support angle 6 and the columnar rib 8 are formed in a shape corresponding to the main body portion 9a of the adhesion preventing member 9, and if the support angle 6 and the columnar rib 8 are fixed at a predetermined position, the adhesion prevention is prevented. The main body portion 9a of the member 9 is pressed in a state where the main body portion 9a of the member 9 is in close contact with the lower ends of the support angle 6 and the columnar rib 8 and the web 3a
Is pressed against.

Now, the concrete formwork of this embodiment can be assembled without welding the adhesion preventing member 9 itself only by pressing it with the support angles 6 and the columnar ribs 8 as described above, so that the welding process can be omitted. The time can be shortened. Further, the adhesion preventing member 9 can be formed of a thinner plate than the face plate 1, is light in weight, and does not significantly affect an increase in the total weight of the mold.

Then, the concrete dropped on the adhesion preventing member 9 at the time of placing can be easily removed along the slanted main body 9a. Also, the lower ends of the support angle 6 and the columnar rib 8 are the main body 9a.
Since the shape corresponds to the shape of the above, it is possible to securely press and hold the adhesion preventing member 9.

[Another Embodiment] Next, another embodiment of the present invention will be described with reference to the drawings starting from FIG.

First, in the second embodiment shown in FIG. 9, the main body 9a of the adhesion preventing member 9 is formed so as to expand upward, and
As a whole, it is inclined downward toward the rib 3b.

In the third embodiment shown in FIG. 10, the main body portion 9a of the adhesion preventing member 9 is formed so as to be recessed downward and is inclined downward to the rib 3b side as a whole as in the second embodiment.

[Effects of the Invention] As described in detail above, according to the present invention, the adhesion preventing member can be easily assembled, the overall weight of the formwork is not significantly increased, and the adhesion of the adhered concrete is prevented. It has an excellent effect that it is easy to remove and that the adhesion preventing member is surely pressed and held.

[Brief description of drawings]

1 is a front view of a first embodiment of a concrete formwork embodying the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG.
FIG. 4 is a sectional view taken along the line BB of FIG. 1, and FIG. 4 is a rear view of the same.
5 is a right side view of the same, FIG. 6 is a left side view of the same, FIG. 7 is a plan view of the same, and FIG. 8 is an enlarged sectional view of an essential part of FIG. FIG. 9 is an enlarged sectional view of the essential parts of the concrete formwork of the second embodiment. FIG. 10 is an enlarged sectional view of the essential parts of the concrete formwork of the third embodiment. 1 ... Face plate, 1a ... Concrete forming surface, 2a ... Web, 2b ... Rib, 2 ... Upper board, 3a ... Web, 3b ... Rib, 3 ... Lower board, 6 ... Support angle, 8: Columnar rib, 9: Adhesion prevention member.

Claims (1)

[Scope of utility model registration request] 1. A flat concrete molding surface (1
a) The webs (2a) and (3a) facing the opposite side of the concrete forming surface (1a) and the tips of these webs (2a) and (3a) are vertically opposed to each other at both upper and lower ends of the face plate (1). Providing bent ribs (2b) (3b) and their webs (2a)
(3a) and ribs (2b) and (3b) form an upper sleeve (2) and a lower sleeve (3), and a main body formed on the inner surface of the lower sleeve (3) with a steel plate thinner than the face plate (1). (9a) is inclined toward the rib (3b) side as a whole to cover the inner surface of the lower shell (3) with an adhesion preventing member (9) for preventing concrete from adhering to the inner surface of the lower shell (3). Is provided on the back surface of the face plate (1) for reinforcement and the like, and the lower end portion is formed by members (6) and (8) having a shape corresponding to the shape of the main body portion (9a) of the adhesion preventing member (9). A concrete formwork characterized in that the adhesion preventing member (9) is pressed so as not to come off from the lower casing (3).