JPH0195005A - Frame - Google Patents

Abstract

PURPOSE:To reduce the man-hours for release and shorten the releasing time by providing a link, one end of which is connected with a first plate, and a link operating component connected with the other end of said link and moving said first plate in the direction to make the area of an opening surface smaller. CONSTITUTION:A mounting component 128 of a lifting hole pin 126 and a long bolt 120 fixing fitting sections 66 and 114 of both frames 1 and 3 are removed after curing concrete 130. A central face plate 11 of an inner frame 1 and left and right side face plates 12 and 13 are separated from the cured concrete 130 by pivoting a link operating component 19 of the inner frame 1 in the arrow-marked direction YA. The inner frame 1 is pulled out of the concrete 130 and a clamping component 104 of the outer frame 3 is removed to release the outer frame 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a formwork for molding concrete, resin, etc.

[Prior Art] Conventionally, a formwork has been used that forms a recessed part having an open surface in a molded object using a plurality of face plates, such as an inner formwork when forming a box culvert waterway by molding a comfort. It is being

Such a formwork is constructed and used as shown below, for example, for a box culvert waterway.

(i) Attach the inner formwork within the outer formwork to construct the formwork.

(11) Concrete is poured between the outer formwork and the inner formwork.

(iii) After the concrete has cured, the inner formwork and outer formwork are demolded.

[Problems to be Solved by the Invention] However, with conventional molds, demolding requires a large number of man-hours and may not be easily performed.

In other words, when demolding a conventional formwork, the bolts etc. are first removed in the recessed part, the formwork is disassembled into a plurality of face plates, and then each face plate is taken out from the opening surface of the recessed part. As a result, there was a problem in that it was troublesome to disassemble the face plate and take it out from the opening surface.

The present invention aims to reduce and simplify the number of steps required for demolding by solving the above-mentioned problems.

[Means for Solving the Problems] As a means for achieving the above object, the formwork of the present invention is a formwork that forms a concave portion having an open surface in a molded object such as concrete or resin using a plurality of face plates. The apparatus includes a link whose one end is connected to the face plate, and a link operating member which is connected to the other end of the link and moves the face plate in a direction that reduces the area of the opening surface.

The object to be molded is, for example, concrete, foamed resin, fiber-reinforced plastic, or the like.

[Function] In the formwork of the present invention, after forming a concave portion having an opening surface on a molded object, the link operating member is operated to move the face plate connected to the link operating member by the link so that the area of the opening surface is smaller than the area of the opening surface. Move in the direction of becoming smaller.

As a result, the face plate separates from the object to be molded.

Further, for example, before the face plate is moved by the link operating member in the direction in which the area of the opening surface becomes smaller, it may be held in a predetermined state by the link operating member and the link, or it may be held in a predetermined state by another holding member. It may also be a configuration that is maintained in

[Example] Next, an example in which the formwork of the present invention is applied to an inner formwork for a box culvert waterway will be described based on the drawings.

The inner formwork 1 for a box culvert waterway of this embodiment constitutes a set of box culvert waterway formwork 5 together with the outer formwork 3, as shown in the perspective view of FIG.
It has the configuration shown below.

Inner formwork 1 of box culvert waterway formwork 5: This inner formwork 1 has the front view in Fig. 2, the DA-DA cross section in Fig. 2, and DB in Fig. 3 as main constituent members. As shown in FIG. 4, which shows the -DB cross section, and FIG. 5, which shows the DC-DC cross section of FIG. Left side plate 12
．． The right side plate 13 creates a rectangular columnar space 17 as a concave portion having an opening surface 15 in the concrete as the molded object.
One end is rotatably connected to the central face plate 11, and the other end is a link operating member 19, which will be described later.
a central link 21, 22 rotatably connected to the central link 21, 22, and a link relay member 24 whose one end is attached to the central face plate 11;
．． 25, and the other end is connected to the left side plate 12.
left side links 27, 28 rotatably connected to the left side links 27, 28, and right side link 30 whose one end is rotatably connected to the link relay member 24, 25 and the other end is rotatably connected to the right side plate 13. .31.

As a result, the operation section 33 of the link operation member 19 is moved by the arrow Y.
By rotating in the A force direction (see FIG. 2), the central link 21.22 rotatably connected to the arm portion 35.37 of the operating member 19 moves in the arrow YB force direction, and the link relay member 24. The left links 27 and 28 connected to the link operating member 19 via 25 are connected to the center links 21 and 22.
With the movement of , it first moves in the direction of arrow YC, and then moves in the opposite direction of arrow YC. Also, similarly, the right link 30°31
first moves in the direction of arrow YD force, then moves in the opposite direction of arrow YD.

The central face plate 11 is rotatably connected to the central link 21, 22, and the integral left side is rotatably connected to the left and right links 27, 28, 30, 31.

12.13 on the right side plate means that until the link operation member 19 is rotated in the arrow YA force direction, the connecting plate 39.40 of the center plate 11 and the connecting plate 4 of the left and right side plates 12.13.
2.43 are in close contact with each other to form a columnar face plate having a substantially square cross section.

When the link operation member 19 is rotated in the force direction of the arrow YA, the central face plate 11, left side plate 12, and right side plate 13 operate as shown below.

(i) When the central link 21.22 rotatably connected to the link attachment portion 51.52 of the central face plate 11 moves in the direction of the arrow YB force, the central face plate 11 moves in the direction of the arrow YB force.

(ii) As the central face plate 11 moves in the arrow YB force direction, the link attachment portions 54.5 of the left and right side plates 12.13
Left and right links 2 rotatably connected to 5, 56 and 57
7, 28, 30.31 move in the directions of arrows YC and YD, the left and right side plates 12.13 move in the directions of arrows YC and YD.

(iii) Due to (i) and (ii) above, the joint plates 42.43 of the left and right side plates 12.13 are separated from the joint plate 39.40 of the central face plate 11, and the central face plate 11 moves smoothly in the arrow YB force direction. .

(iv) By further moving the center plate 11 in the direction of arrow YB force, the joint plates 39 and 40 of the center plate 11 are moved to the left and -
The right side plate 12.13 moves to a place where it does not hit the joint plate 42.43, and the left and right side plates 12.13 move in opposite directions of arrows YC and YD.

Therefore, according to (1) to iv) above, the central face plate 11 and the left and right side plates 12 and 13 are rotated in the direction of arrow YA by rotating the link operating member 19 with a lever (not shown) or the like. Move in the direction of decreasing the cross-sectional area.

The link operating member 19 for reducing the cross-sectional area of the inner formwork 1 is rotatably held by operating member mounting portions 61 and 62 attached between the integrated left and right side plates 12 and 13. has been done. Further, the operating member mounting portion 62 includes:
A stopper 64 is provided to hold the link operating member 19 at an initial position (a position used as a formwork), and a stopper 64 is provided at the bottom of the inner formwork 1 for fitting with an outer formwork 3 to be described later. A portion 66 is provided (see FIG. 3).

Outer formwork 3: The outer formwork 3 that accommodates the inner formwork 1 is shown in the partially cutaway front view of FIG. 6 showing a state in which the inner formwork 1 is accommodated, and in FIG. 7 showing its right side. As shown in FIG. 8 showing the DD-DD cross section of FIG. 6, it is composed of iron face plates 101, 102 and a bottom plate 103. This face plate 101, 10
2 each other is a clamp member (here bolt, nut)
04, and a rib 105 for reinforcing the outer frame and a U-shaped reinforcing member 106 are attached to the outer periphery of the face plates 101 and 102. Further, an upper mold 108 forming a joint portion for fitting with another box covered waterway is attached to the upper part with bolts 110.

A floor plate 103 that holds the poured concrete within the formwork 5 by being located under the face plates 101 and 102.
A lower mold 112 forming a joint portion for fitting with another box covered waterway is attached to the lower mold 112, and a fitting portion 114 (see Fig. 8) with the inner mold frame 1 is provided below the lower mold 112. There is.

The inner formwork 1 and the outer formwork 3 described above are constructed and used as shown below.

(i) Fitting portion 114 of outer formwork 3 in fitting portion 66 of inner formwork 1
As shown in FIG. 8, the molds are fitted together and both forms are fixed with long bolts 120.

(11) The face plates 101 and 102 of the outer formwork 3 are joined together by the clamp member 104.

(iii) A large pin 126 for forming a hole between the assembled outer formwork 3 and inner formwork 1 is attached using an attachment member 128.

(iv) Concrete 13 between the outer formwork 3 and the inner formwork 1
Insert 0.

<V> After curing the concrete 130, the large quantity pin 126
The mounting member 128 and the fitting portion 66.11 of both formworks 1 and 3
Remove the long bolts 120 that were fixing 4.

(vl) Rotate the link operating member 19 of the inner formwork 1 in the direction of arrow YA force. As a result, as shown in FIG. 1, the center plate 11, left and right side plates 12 and 13 of the inner formwork 1 are separated from the hardened concrete 130.

<V> Push out the inner formwork 1 from the concrete 130,
Remove the clamp member 104 of the outer formwork 3 and
Remove the mold.

As explained above, the box culvert waterway formwork 5 of this embodiment allows the link operation member 19 of the inner formwork 1 to be operated without the complicated work of removing bolts etc. in the narrow space inside the inner formwork 1. By simply rotating in the direction of the arrow YA force, the inner formwork 1
Since the concrete can be demolded from 13 degrees of concrete, it has extremely excellent effects in that the number of man-hours for demolding can be reduced and the demolding time can be shortened. Moreover, since the inner formwork 1 can be assembled by simply rotating the link operating member 19 in the opposite direction of the arrow YA, an excellent effect is achieved in that the number of man-hours and the assembly time can be shortened.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and various embodiments can be implemented without changing the gist of the present invention, such as the shapes of the object to be molded and the mold.

[Effects of the Invention] In the formwork of the present invention, the link operation member moves the face plate in a direction that reduces the area of the opening surface of the formwork, thereby removing the formwork from the object to be molded.

Therefore, it is no longer necessary to disassemble the formwork forming the concave portion into multiple pieces through the opening surface, for example.
This has an extremely excellent effect of reducing the number of man-hours for demolding and shortening the demolding time.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment to which the formwork of the present invention is applied;
The figure is a front view of the inner formwork of the example, and Figure 3 is its DA-DA
4 is a DB-DB sectional view, FIG. 5 is the same <DC-DC sectional view, and FIG. 6 is a partially cutaway view of the combination of the inner formwork and outer formwork of the embodiment. A front view shown,
FIG. 7 is a side view thereof, and FIG. 8 is the same <DD-DD sectional view. 1...Inner formwork 3...Outer formwork 5...Box culvert waterway formwork 11...Central face plate 12...Left side plate 13...Right side plate 15...Opening face 17... - Quadrilateral columnar space 19...Link operation member 21.22...Central link 27.28...Left link 30.31...Right link 130...Concrete

Claims (1)

[Scope of Claims] A formwork for forming a concave part with an opening in a molded object such as concrete or resin by means of a plurality of face plates, the link having one end connected to the face plate, and the other link. A formwork comprising: a link operating member connected to an end and configured to move the face plate in a direction to reduce the area of the opening surface.