JPH0128189Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a beam formwork in which upper and lower molding dimensions can be freely adjusted.

The conventional beam formwork structure used to form beams in concrete buildings consists of two beam formworks set up opposite each other on both sides, the two beam formworks connected by a separator, and a bottom section between the two beam formworks. The formwork was arranged so that the outside of both beam formworks was supported by thick timbers, and at the same time the bottom formwork was supported by pipe supports.

By the way, the height dimensions of the beams of concrete buildings differ from building to building depending on the height and size of the building.

For this reason, in conventional beam formwork structures, it is necessary to prepare formwork for each beam height according to the height of the beam, which requires a large amount of expense for the formwork, and at the same time There are problems in that it is extremely troublesome to manage and requires a large storage space.

This idea was made to solve the above problems, and a single formwork can accommodate a wide range of changes in vertical and vertical dimensions, resulting in a significant reduction in equipment costs when constructing concrete buildings. The object of the present invention is to provide a beam formwork that can reduce storage space.

The structure of this invention is that the upper formwork and the lower formwork are formed to be vertically expandable so as to fit inside and outside, and vertical ribs with bolt insertion holes are fixed to the outer surfaces of the upper formwork and the lower formwork, respectively. Connecting rods with adjustment holes provided at regular intervals are arranged overlapping the vertical ribs of the upper formwork and the vertical ribs of the lower formwork, and the bolt insertion holes of both vertical ribs are connected to the adjustment holes of the connecting rod that communicate with the vertical ribs. These are connected by bolts and nuts, and the height of the connection between the upper and lower formworks can be changed by adjusting the pitch of adjustment holes provided in the connecting rods.

This invention will be explained below based on the embodiments shown in the accompanying drawings.

As shown in the diagram, the beam formwork structure consists of vertically telescopic formwork 1
, the length expansion/contraction formwork 31, the bottom formwork 51, the connecting fittings 53 for fixing the end pieces 52 for supporting lateral pressure to the vertical expansion/contraction formwork 1 and the length expansion/contraction formwork 31, and a separator for maintaining the distance. 54, and when a short length adjustment is required, an adjustment member is used auxiliary.

The vertically telescopic formwork 1 is formed of an upper formwork 2, a lower formwork 3, and a vertical adjustment mechanism 4, as shown in FIGS. 1 and 2.

First, the upper formwork 2 is constructed by connecting an opposing outer plate 7 with a gap 6 on the outside of the forming plate 5 via a connecting piece 8 at the upper end, and connecting a flat rectangular tube 9 to the upper end of the outer plate 7 and a lower end to the outer plate 7. A flange 10 is provided on the connecting piece 8, and a corner projection 11 provided on the connecting piece 8 connects the rectangular tube 9.
A support step 12 for the slab formwork 55 is formed on top. Note that the outer plate 7 may be formed in a band shape separate from the rectangular tube 9 as shown by the dashed line in FIG.

Vertical ribs 13 are provided at both ends of the upper formwork 2, and the vertical ribs 13 are provided with insertion holes for bolts and nuts 14 that connect the adjacent upper and lower telescoping formworks 1 to each other and the longitudinally telescoping formwork 21. There is.

Next, the lower formwork 3 is attached to the inner plate 1 on the upper surface of the bottom plate 15.
6 and an outer plate 17 are arranged facing each other, a flange 18 is provided protruding from the upper edge of the outer plate 17, vertical ribs 19 are provided at both ends, and plywood or the like is used between the inner plate 16 and the outer plate 17. The lower part of the plate 20 is fitted and fixed, and the vertical rib 19 is formed with holes through which bolts and nuts 21 are inserted.

The upper part of the molding plate 20 in the lower formwork 3 fits into the gap 6 in the upper formwork 2, and the upper and lower formworks 2
and 3 are combined so that the vertical height can be expanded and contracted freely within the fitting range between the molded plate 20 and the gap 6.

The vertical adjustment mechanism 4 includes a plate 23 fixed to the vertical rib 13 of the upper formwork 2 with bolts and nuts 22,
A plate 24 is fixed to the vertical rib 19 of the lower formwork 3 with bolts and nuts 21, and adjustment holes 25 are provided at regular intervals in the longitudinal direction. and a connecting rod 27 that connects 24.

The connecting rod 27 is formed using an angle material,
In addition to reinforcing the lateral pressure in the beam formwork, the interval P between the adjustment holes 25 provided above and below is set to 50 mm to accommodate changes in the vertical height depending on the type of beam.

In addition, the insertion holes 28 for the bolts and nuts 22 of the plate 23 fixed to the upper formwork 2 are bored so that the interval P' is 15 mm as shown in Fig. 2, and the vertical height can be finely adjusted in this part. is becoming possible.

The length-expandable formwork 31 is composed of a pair of side formworks 32, 32 on both sides, and a forming plate 33 interposed between the side formworks 32, 32.
2 is a forming plate 34 as shown in FIGS. 1 and 5.
A gap 36 is provided between the outer plate 35 and a rectangular tube 37 and a corner protrusion 38 on the upper part of the outer plate 35.
are provided to form the support step 39 of the slab formwork 45, and longitudinal ribs 40, 40 are provided on both sides of the outer plate 35.
A flange 41 is provided at the lower end.

Both sides of the molding plate 33 are slidably fitted into the gap 36 between the side molds 32, 32, and the molding plate 33 is fitted between the gap 36 and the molding plate 33.
The length of the telescopic formwork 31 can be adjusted freely within the range of the fitting amount, and after setting the length, the forming plate 33 and the formworks 32 on both sides are fixed by driving nails 42. It's getting old.

This length adjustment formwork 31 can only be adjusted in length, and in order to accommodate changes in height, forms with different heights are prepared according to the type of adjustment pitch in the vertical telescoping formwork 1. Each formwork may be made of aluminum, stainless steel, steel plate, synthetic resin, or the like.

As shown in FIGS. 1 and 2, connection fittings 53 for supporting lateral pressure by disposing the end pieces 52 on the outer surfaces of the vertically expandable formwork 1 and the length expandable formwork 31 are attached to the end pieces 52 as shown in FIGS. 1 and 2. Fixed frame body 53a that is removably fitted to the outside of the frame body 53a
A rising piece 53b is provided, and an insertion piece 53d is provided on the upper end of this rising piece 53b in an inclined manner. Slanted hole 56 into which piece 53d is inserted
The connection fitting 5 is provided with the insertion piece 53d and the inclined hole 56.
3 to prevent the end piece 52 from coming off in the width direction.

The beam formwork of this invention has the structure shown above.
The vertically telescoping formwork 1 is set to a desired height using the vertical adjustment mechanism 4, and this vertically telescoping formwork 1 is
Length adjustment formwork 3 with vertical dimensions according to the set height of
1 is prepared, upper and lower telescopic formworks 3 are sequentially arranged on both sides with a beam forming interval between corresponding surfaces, and a length adjustment formwork 31 is arranged at one end.

While connecting the opposing upper and lower telescopic formworks 1 to each other and the length telescopic formworks 31 to each other with a separator 54,
Adjacent upper and lower telescopic formworks 1 and the vertically telescopic formwork 1 and the longitudinally telescopic formwork 31 are connected with bolts and nuts.

The length-expandable formwork 31 is set to a predetermined length, and the bottom formwork 51 is placed below these opposing formworks and is nailed to the bottom plate 15 and flange 41. Although not shown in the drawings, the bottom formwork 51 supported with pipe supports.

Further, thick end members 52 are arranged on both outer surfaces of the formwork group facing each other on both sides, and each inclined hole 56 of the end thick material 52 is arranged.
By fixing the connecting fitting 53 at a position corresponding to , and inserting the insertion piece 53d of the connecting fitting 53 into the inclined hole 56, a beam frame structure is assembled as shown in FIGS. 3 and 4.

Although not shown, the beam formwork structure is constructed between column forms, and the end of the slab formwork 55 is connected to the support step 1.
2.39, concrete is placed after the reinforcing bars are placed, and disassembly after the concrete solidifies can be carried out in the reverse order of the assembly.

As described above, according to this invention, the upper formwork and the lower formwork are fitted so that they can expand and contract up and down,
The upper and lower formworks are connected by bolts and nuts to connecting rods with adjusting holes provided at regular intervals in the longitudinal direction, so the vertical height dimensions of the beam forming surface formed by the upper and lower formworks can be adjusted. The pitch of the holes can be changed freely, making it possible to use a single formwork to correspond to the types of vertical dimensions of beams used in concrete buildings.

In addition, since a single formwork can accommodate changes in vertical height dimensions, there is no need to prepare multiple types of formwork, making it possible to significantly reduce equipment costs required for formwork. This has the effect of reducing the storage space required to store the items.

Furthermore, since the upper and lower forms fit into each other and the connecting rod connects them on the outside, sufficient strength can be exerted against lateral pressure during concrete pouring.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the use of the beam formwork according to this invention, Fig. 2 is a vertical sectional view of the same as above, Fig. 3 is a front view of the beam formwork structure constructed, and Fig. 4 is the same. The plan view and FIG. 5 are enlarged cross-sectional views of the main parts of the same. 1 is a vertically expandable formwork, 2 is an upper formwork, 3 is a lower formwork, 4 is a vertical adjustment mechanism, 5 is a forming plate, 6 is a gap, 7 is an outer plate, 12 is a support step, 13
is a vertical rib, 14 is a bolt, nut, 15 is a bottom plate,
16 is an inner plate, 17 is an outer plate, 18 is a flange,
19 is a vertical rib, 20 is a molded plate, 21, 22, 26
are bolts and nuts, 23 and 24 are plates, 25
27 is an adjustment hole, 27 is a connecting rod, and 28 is an insertion hole.

Claims (1)

[Scope of utility model registration request] The upper and lower formworks are formed to be vertically expandable and fit inside and out, and vertical ribs with bolt insertion holes are fixed to the outer surfaces of the upper and lower formworks, respectively, and adjusted at regular intervals in the longitudinal direction. Place the connecting rod with holes overlapping the vertical ribs of the upper formwork and the lower formwork, and connect the bolt insertion holes of both vertical ribs and the adjustment holes of the connecting rod that communicate with these with bolts and nuts. Connected beam formwork.