JPH0420656A - Beam unit mold - Google Patents

Abstract

PURPOSE:To easily assemble and disassemble a beam unit mold, by suspending the bottom mold of a beam from the side mold of the beam and supporting the side molds with a column and further supporting the side molds at both sides of the bottom mold respectively to be of cantilever and by opening and closing them with the rotary movement around the supporting axis. CONSTITUTION:The bottom plate 10 of a beam is tightly put between the side plates 2 by fastening bush bolts 21 and the lower edge of the side molds 1 of the beam is pressed to a sleeper 13 by fastening bolts 17. Next, the side molds 1 are adjusted by adjusting bolts 23 to fix the rod 32 and fasten the bolts 23 to the pushing direction of the bracket 25. Next, a beam unit mold A is raised up to a specified position and the column 14 is loaded with the whole weight and further the beam unit mold is leveled by level jacks 41. When disassembling the mold, the jacks and all bolts 21, 17 are loosened. After the bolts 23 are loosened, the bracket 25 is drawn off and the mold 1 is separated by turning it around the lower edge.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a beam unit form, and more particularly to a grate unit form that effectively utilizes the area under the beam.

[Prior art] In normal beam formwork, panels are processed to the specified dimensions to produce a face plate for each floor, and after this face plate is assembled at the frame position on site, terminals, supports, etc. are installed at this location. We are trying to assemble steel pipe materials.

This conventional beam formwork construction method requires a large number of formwork engineers and carpenters, making construction difficult in terms of construction time and quality in today's labor shortage.

For this reason, in recent years, there has been a rapid increase in the use of wall/slab wall/slab construction methods for speedy construction and cost reduction. In this case, the beam formwork uses a construction method in which thick panels and the like are attached in advance to a large panel to form a unit, and the unit is moved to the construction site using heavy machinery or the like. Furthermore, this construction method tends to reduce the number of supports in order to make more effective use of the floor surface under the beams during the life of the formwork.

[Problems to be Solved by the Invention] In the conventional beam formwork, for example, the joists arranged in the longitudinal direction of the beam bottom are supported by columns at appropriate intervals through large pullers, and the concrete load causes the gaps between the columns to be reduced. The bending stress generated in the beam formwork is borne by the joists. For this reason, if the number of supports is reduced and the support spacing between the joists is increased, the cross-sectional size of the joists must be increased in order to ensure the specified bending strength and suppress distortion to an acceptable value.
Normally, this is dealt with by increasing the thickness of the joists (the longitudinal dimension of the cross section of the member).

However, if the joist material protrudes below the beam while the beam formwork is in place, the work space under the beam becomes narrow, making it difficult to carry out the actual formwork materials for columns and walls, for example.

This invention was made in view of the above circumstances, and provides a beam unit formwork that can reduce the number of supports, secure the height of the space under the beam, and facilitate assembly and disassembly of the formwork. It is intended to.

[Means for Solving the Problem] In order to solve the problem, the invention according to claim 1 allows the beam side formwork to support the beam bottom formwork, and the beam side formwork is supported by supports and/or The beam side formwork is supported by a hanging member, and the beam side formwork is cantilevered on both sides of the beam bottom formwork, and is opened and closed by rotation on a support shaft parallel to the beam axis. There is.

Further, the invention according to claim 2 is characterized in that the beam side formwork is formed by joining horizontal reinforcing members of the upper chord and lower chord, and vertical studs at predetermined intervals to the face plate.

Furthermore, the invention according to claim 3 is characterized in that the support column is independently supported by the beam side formwork and is provided with casters for horizontal movement.

Further, the invention according to claim 4 is characterized in that the support column is provided with a level variable mechanism that can be raised and lowered by a jack.

[Function] In the invention described in claim 1, the concrete load is transmitted to the beam side formwork via the beam bottom formwork, and the bending stress of the beam formwork generated between the columns and/or hanging members is transferred to the beam side formwork. Therefore, the bottom formwork does not have to bear the bending stress between the struts and/or the hanging members. Therefore, the cross-sectional size of the beam bottom formwork including the face plate, joist, etc. can be small, and the formation of the beam bottom formwork can be suppressed.

Further, since the beam side formwork has a long cross section in the load direction and is large in size, bending strength in the load direction can be easily ensured, and the spacing between the supports can be increased.

When the beam side formwork is closed, this beam unit formwork is integrated with the beam bottom formwork, and when it is opened, the beam side formwork peels off and the beam unit formwork can be demolded, but the beam side formwork It is easy to set up because it is cantilever supported, and it is easy to demold because it rotates on a support shaft parallel to the beam axis. By joining the vertical ends, the bending strength of the beam side formwork in the load direction is further improved.

In addition, in the invention as set forth in claim 3, the support column is supported independently and the casters are attached, so that the beam unit form can be horizontally moved on the floor while the beam side form and the beam bottom form are connected.

Further, in the invention as set forth in claim 4, the level variable mechanism allows the installation height of the beam unit formwork to be adjusted and the beam unit formwork to be lowered after demolding easily with a jack.

[Example] Next, an example of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a side view of the porcelain unit formwork, Figure 2 is the I of Figure 1.
I-II cross-sectional view, Figures 3 and 4 are cross-sectional views of the main parts of the beam unit formwork, and Figure 3 is a closed view of the beam side formwork.
Figure 4 is an open view of the beam side formwork.

In the face plate 2 of the beam side formwork 1 in the beam unit formwork A,
Reinforcing plates 3 are provided on the top and bottom, and horizontal reinforcing members 4 made of L-shaped steel are provided on the outside of the top chord and inside of the bottom chord, and vertical studs 5 are installed at predetermined intervals between the reinforcing plates 3, and these are joined and stocked. There is. The vertical end piece 5 is connected by a horizontal end piece 8 via a hook bolt 6 and a washer 7.

In this way, the beam side formwork 1 exhibits high bending rigidity in the load direction by joining the horizontal reinforcing members 4 and the vertical end pieces 5 to the upper and lower chords of the face plate 2. Further, the vertical end thickness 5 has an effect of preventing buckling of the face plate 2, and the reinforcing plate 3 has an effect of preventing the face plate 2 from bending outward in response to lateral pressure. For example, plywood for scaffolding boards is used as the reinforcing board 3.

The face plate 10 of the beam bottom formwork 9 is supported by joists 13 at predetermined intervals through joists 11 made of square pipes and timbers 12, and vertical end slats 5 are supported in cantilevers at both ends of the joists 13. Obiki 13
has a structure in which C-shaped steels are welded back to back at predetermined intervals with plates 1415 interposed in between. (Fig. 7) Bolt 17 and U band 1 are connected to Ohiki 13 via washer 16.
8 connects the lower ends of the vertical ends 5, and by tightening the bolts 17, the beam side mold 1 is crimped to the main drawer 13. An L piece 20 is attached to the main drawer 13 via a bolt 19, and the tip of a bushing bolt 21 screwed into the L and -s 2o is brought into contact with the outside of the lower end of the #Ei end piece 5 via a plate 22. Beam width is maintained.

Plate 15 from hole 14a of plate 14 of large pull 13
Adjustment bolt 23 inserted through hole 15a of
is rotatable, and a nut 24 is welded to prevent it from coming off.

The boss portion 25a at the lower end of the bracket 25 is screwed into the adjustment bolt 23 with the shaft 11:zsb inserted into the guide hole 13b formed in the flange 13a of the main drawer 13. The rotation of the bracket 23 causes the lower end of the bracket 25 to move in the direction of the beam width. The bracket 25 is constructed by connecting an outer cylinder 25c and an inner cylinder 25d in an expandable and retractable manner, and can be adjusted to a predetermined length with a connecting pin 26, and its upper end is connected to the center of the vertical end piece 5 via a bolt 27. Ru. A U-shaped tie 3° is connected to the anchor plate 28 at the end of the large puller 13 via a bolt 29, and the lower end of the rod 32 connected to the upper end of the vertical end 5 with the bolt 31 is connected to the U-shaped tie 30. It is attached to the folded part 318 and fixed with the wedge 33.

Therefore, by loosening the bolt 17 and the bushing bolt 21 and removing the wedge 33, the adjustment bolt 23 is rotated, and the vertical end 5 is rotated with its lower end as a supporting shaft parallel to the beam axis, thereby opening and closing. It is possible. (Fig. 4) The support column 34 installed at 2111 of the beam unit formwork A is composed of a lower frame 35 and an upper frame 36, and the vertical members 35 of the lower frame 35
a is inserted through the vertical member 368 of the upper frame 36, and the connecting hole 36b of the upper frame 36 is aligned with one of the connecting holes 35b of the lower frame and fixed with a pin 37.

The support column 34 has a structure in which the fingers 36c of the upper frame 36 are brought into contact with the horizontal reinforcing member 4 of the lower chord of the beam side formwork 1 to transmit the entire load to the beam unit formwork. By connecting the support 34 and the arm 38 at the place 39, the support 34 can stand on its own with the beam unit formwork A mounted thereon. Further, casters 40, a level jack 41, and a holder 42 for preventing the level jack 41 from falling are attached to the lower frame 35, and a hydraulic jack 43 is attached to each of the lower frame 35 and the upper frame 36.
A mounting section is provided. The level variable mechanism includes the lower frame 35 and upper frame 36 of the support column 34 and the hydraulic jack 43kJ.
The set of follower and beam unit formwork A consists of:
First, the bush bolts 21 are tightened to sandwich the beam bottom face plate 10 between the beam side face plates 2 without any gaps, and then the bolts 17 are tightened to press the lower end of the beam side formwork 1 to the drawer 13. Then, use the adjustment bolts 23 to adjust the erection of the beam side formwork 1, and when the upper part of the face plate 2 is cleared, drive the wedge 33 to fix the rod 32, and then tighten the adjustment bolt 23 in the direction that pushes the bracket 25. When tightened, a moderate compressive force is applied to the bracket 25 and at the same time a tensile force is applied to the rod 32, forming the beam I11 side formwork]
is cantilever-supported by the main puller 13 accurately and without any play.

In this way, after the tightening adjustment is completed, move it to the installation location, use heavy machinery, etc. to lift the beam unit formwork A to a predetermined level, adjust the support column 34 to the predetermined length, and then insert the pin 37 into the connecting hole. 36b (illustrated A in FIG. 2) and the upper frame 36
into the connecting holes 35b (openings shown) in contact with the lower ends of the pillars, apply the full load of the unit formwork A to the pillars 34, and adjust the level with the level jack 41. After this, concrete is poured, but immediately after pouring. If the beam side formwork 1 is deformed due to lateral pressure, adjust the adjustment bolt 2.
Readjustment is possible by tightening 3 further (Figures 1 and 2).

To remove the formwork, first loosen the level jack 41, remove the upper pin 37 (A in the figure), set it in the connecting hole 35b (C in the figure) in the middle of the lower frame 35, and insert the hydraulic jack 43 into the mounting part. Once set between 35c and 36d, remove the lower pin 37 (opening shown).

Since the level jack 41 will not be used, it should be secured with a holder 42 to prevent it from coming out.Then, remove all the wedges 33 of the rod 32 and attach them to the bracket 25, leaving only the left and right sides of the column side (2 and H in Figure 1). Remove the connecting pin 26, loosen all the bushing bolts 21 and bolts 17, and then tighten the adjustment bolt 2 at the position where the connecting pin 26 remains.
3 is loosened, the bracket 25 is pulled, and the beam side formwork 1 is peeled off while rotating around its lower end (FIG. 11).

Next, the beam unit formwork A is lowered while adjusting the level by loosening the valve of the hydraulic jack 43, so that the upper frame 36 is lower than the lower frame 3.
5, the hydraulic jack 43 is set again (Fig. 12).Finally, the pin 37 (shown c) in the middle of the lower frame is removed and the hydraulic jack 43 is replaced in the same way. Operate the beam unit formwork A to the bottom.
(Figures 13 and 14).

After the demolding is completed, the beam unit formwork A is lowered to a position lower than the frame beam, and then horizontally transported to an external stage using casters 40, and can be repurposed to another installation location using heavy machinery.

In this way, the concrete load is transmitted to the beam side formwork l via the beam bottom formwork 9, and the bending stress of the beam formwork occurring between the supports 34 is borne by the beam side formwork 1, so that the beam bottom formwork l The frame 9 does not need to bear the bending stress between the supports 34, and the cross-sectional size of the joist 11 etc. can be small, so there is less need for a portion protruding downward from the beam bottom.

In addition, since the horizontal reinforcing members 4 are joined to the upper and lower chords of the face plate 2 on the beam side, the beam side formwork 1 has high bending strength in the load direction, and the number of supports can be reduced. .

For this reason, it is possible to secure a wide working space and passage under the beams even during concrete curing, and it is possible to easily transport the preceding column and wall formwork materials, so the wall/slab separation method Ideal for

Furthermore, the beam side formwork 1 is cantilevered on both sides of the beam bottom formwork 9, and is opened and closed by rotation on a support shaft parallel to the beam axis, so that installation and removal of separators, etc. The beam formwork can be easily set and removed with high precision by repeating the above-mentioned operation. In addition, since the side formwork was supported so that it could be opened and closed, the frame was not damaged during demolding.

In addition, since the pillars 34 provide independent support, the casters 40
Therefore, it is possible to carry in and out the porcelain unit formwork A,
Work efficiency improves.

Furthermore, the level variable mechanism makes it easy to adjust the installation height of the beam unit formwork and to lower it after demolding with a jack.

In addition, in the above embodiment, the beam bottom formwork is supported by the beam side formwork, and the beam side formwork is supported by the pillars.
The beam side formwork may be supported by a hanging member, and this hanging member is configured to suspend the beam side formwork from a steel frame or the like using, for example, a hanging bolt.

[Effects of the Invention] As explained above, in the invention according to claim 1, the beam side formwork is cantilevered on both sides of the beam bottom formwork, and is opened and closed by rotation on the support shaft parallel to the beam axis. As a result, the beam formwork can be easily set and removed with high precision by simple repeated operations, without the need for separators, etc., and with a small number of supports with fewer parts protruding from the bottom of the beam. This eliminates the need to damage the body during demolding.

Furthermore, in the invention as claimed in claim 2, the beam side formwork is formed by joining the horizontal reinforcing members of the upper and lower chords and the vertical studs to the face plate, thereby achieving high bending strength with a relatively lightweight member. material can be used efficiently.

Further, in the invention as claimed in claim 3, since the support supports are self-supporting, the beam unit form can be easily transported horizontally by the casters while the beam side form and the beam bottom form are connected.

Furthermore, in the invention as set forth in claim 4, the variable level mechanism allows the beam to be used for different heights, and if the beam is lowered to a certain level after demolding, it can be easily carried out.

[Brief explanation of drawings]

Figure 341 is a side view of the beam unit formwork, Figure 2 is a cross-sectional view taken along line II-I in Figure 1, Figures 3 and 4 are cross-sectional views of the main parts of the beam unit formwork, and Figure 3 is a side view of the beam unit formwork. Figure 4 is a view with the side formwork closed, Figure 4 is a view with the beam side formwork opened, Figure 'M5 is a perspective view of the bracket, Figure 6 is a sectional view taken along Figure 8 is a cross-sectional view taken along ■-■ in Figure 3, Figure 9 is a cross-sectional view taken along
XX sectional view in the figure, FIG. 11 is a sectional view of the beam unit formwork showing the demolded state, FIG. 12 is the same sectional view showing the descending state by the slide mechanism, and FIG. 13 shows the end of the descent by the slide mechanism. Side view, Figure 14 is Xr%'-Xr in Figure 13
It is a V sectional view. In the figure, symbol A is the beam unit formwork, 1 is the beam side formwork, 2 is the face plate on the beam side, 4 is the horizontal reinforcing material, 5 is the vertical end thickness, 9 is the beam bottom formwork, 10 is the face plate on the beam bottom, 13 is the main drawer, 21 is the bush bolt, 23 is the adjustment bolt, 25 is the bracket, 3
2 is a rod, 33 is a wedge, 34 is a support, and 40 is a caster.

Claims (1)

[Scope of Claims] 1. The beam bottom formwork is suspended and supported by the beam side formwork, and the beam side formwork is supported by supports and/or hanging members, and furthermore, the beam side formwork is suspended from the beam side formwork. A beam unit formwork that is cantilevered on both sides of the bottom formwork and can be opened and closed by rotation on support shafts parallel to the beam axis. 2. The beam unit form according to claim 1, wherein the beam side form is formed by integrally joining horizontal reinforcing members on the upper and lower chords and vertical end pieces at predetermined intervals to the face plate. 3. The beam unit form according to claim 1, wherein the support is independently supported by the beam side form and is provided with casters for movement. 4. The beam unit formwork according to claim 1, wherein the support column is provided with a level variable mechanism that can be raised and lowered by a jack.