JPH0932283A - Beam form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the release and installation of a beam form, reduce the possibility of a trouble at the time of moving and tuning, and reduce the number of supports. SOLUTION: A formwork frame 4 and a panel formwork 1 constituting a beam formwork are separated, the panel formwork 1 is divided into two in the axial direction, split panel formwork units 10 are mounted in the formwork frame 4 movably in the axial direction, and the side plate 2 of the panel formwork 1 is connected to a bottom plate 3 rotatably around the axis parallel with the axis of a beam. Sufficient rigidity to resist the side pressure of beam concrete is given to the formwork frame 4 by stanchions 6 rigidly connected to the sleepers 5 of the formwork frame 4 and a tie material 7 connecting the stanchions 6, 6. Support metals 18, 18 fixed to pillars are connected at both ends in the axial direction of the sleepers 5, and the beam formwork can be supported on the pillars by the support metal fixtures 18, 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam formwork used for constructing a reinforced concrete structure or a beam of a steel frame reinforced concrete structure.

[0002]

A panel formwork having a groove-shaped cross section, which is a beam formwork weirboard used for construction of a beam in which the entire cross section of concrete is constructed by cast-in-place concrete, and a panel on the outer peripheral side thereof. It is composed of a form frame that restrains the deformation of the form.

Since the conventional beam formwork is assembled in a state in which the panel formwork and the formwork frame are integrated as shown in FIGS. 10 and 11, the panel formwork is installed and released from each formwork frame. Since it is necessary to move the mold frame at any time, it takes time to remove the mold and install it.

Since it is necessary to resist the lateral pressure of concrete acting on the panel formwork, the formwork frame has a truss-like shape with a section in its cross section, so that the formwork frame has a wide width, which is an obstacle during movement and lifting. Often.

The formwork frame bears the load of the beam concrete and a part of the slab concrete, but since the formwork frame is supported by the support as a column or as a form independent of the column formwork, it is added to the beam formwork. Since the support has to bear the entire load, the number of supports increases.

The present invention proposes a beam formwork that solves the above problems.

[0007]

According to the present invention, the form frame and the panel form are separated from each other, the panel form is divided into two, and each divided panel form unit is axially movable to the form frame. By mounting on the column, the work during demolding and installation can be simplified while coping with the difference in the distance between columns.

The panel formwork is composed of opposing side plates and a bottom plate extending between the lower ends of both side plates. The side plates are rotatably connected to the bottom plate about an axis parallel to the axis of the beam. Done by Since the mold release and installation of the panel formwork are performed independently of the formwork frame, there is no need to operate the formwork frame, and the work is simplified. Here, the installation of the side plate means that the side plate is arranged in a state in which the side plate falls from the pillar side and is removed from the mold, and then stands up to enable the placement of beam concrete.

The panel formwork is divided into two in the axial direction, and each of the divided panel formwork units is placed in the formwork frame so as to be relatively movable in the length direction with respect to the formwork frame. By dividing the panel formwork into two, it is possible to cope with the difference in the distance between the columns, and it is possible to shorten the length of the beam formwork after demolding, which reduces the possibility of obstacles during refilling.

Further, the form frame is composed of large pulls arranged side by side in the width direction of the beam, columns that are rigidly joined to the pulls, and tie members that are installed between adjacent columns, and rigidly joined to the pulls. By making the formwork frame rigid enough to resist the lateral pressure of the cast concrete by the connecting material that connects the formwork columns, the width of the formwork frame can be reduced by eliminating the need for a copy. And reduce the possibility of obstacles during refilling. The large pulls are located below the side plates of the panel formwork and are connected to each other in the width direction of the beam. The struts are arranged outside the side plate at intervals in the length direction of the large pull.

In addition, the beam formwork is formed by connecting the supporting metal objects fixed to the pillars to the side surfaces of the constructed pillars at both ends in the axial direction of the hauling, and temporarily fixing the supporting metal objects to the constructed pillars. Allows the column to bear part of the load of itself and the concrete and reduces the number of supports required.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The beam formwork according to claim 1 constitutes a concrete siding plate for placing a beam as shown in FIGS. 1 to 3, and the side plates 2 and 2 facing each other and the side plates 2 and 2 facing each other. A panel formwork 1 having a groove-shaped cross section formed of a bottom plate 3 extending between lower ends, and an outer peripheral side of the panel formwork 1 are separately assembled from the panel formwork 1,
It is composed of a form frame 4 which holds the panel form 1 which bears the lateral pressure of the poured concrete from the outer peripheral side thereof. 1 to 3 also show a beam formwork according to claim 2.

The formwork frame 4 is located below the side plate 2,
Large pulls 5, 5 connected in parallel to each other in the width direction of the beam
From the supporting member 6 located outside the side plate 2 and spaced in the lengthwise direction of the large pull 5 and rigidly joined to the large pull 5, and the connecting member 7 installed between the adjacent columns 6 and 6. Become, pillar 6
Are rigidly joined to the large pull 5 and connected to each other by the tie 7, so that they have a rigidity that does not deform with respect to the lateral pressure of the beam concrete acting on the panel formwork 1. The parallel pulls 5 and 5 are connected to each other by a connecting member 8 to maintain a distance therebetween. Since the formwork frame 4 has high rigidity,
As shown in FIG. 1, it is possible to support a floor form or a precast concrete plate 22 that also serves as a floor form. Floor formwork supports 6
Placed on top.

The side plate 2 of the panel formwork 1 is rotatably connected to the bottom plate 3 around an axis parallel to the axis of the beam by a hinge 9 or the like, and is demolded and installed by rotation. As described above, the installation of the side plate 2 refers to a state in which the side plate 2 stands upright from the demolded state to the bottom plate 3. The demolding and installation of the side plates 2 and 2 are performed by a formwork fixing bolt 11 that is installed between the formwork frame 4 and the side plate 2 of the panel formwork 1. The formwork fixing bolts 11 are attached to the tie member 7 at intervals in the lengthwise direction, one end of which is engaged with the rib plate 21 of the side plate 2, and the threaded portion of the other end penetrates the tie member 7 and the nut 12 The side plate 2 is removed from the side plate 2 or installed by adjusting the screwing length to the nut 12. Rib plates 21 and 31 for stiffening are joined to the form frame 4 side of the side plate 2 and the bottom plate 3, respectively. The form frame fixing bolt 11 is a side plate that allows the side plate 2 to bend during concrete pouring. It also has the role of adjusting the distance between 2 and 2.

The panel formwork 1 is axially divided into two parts in the axial center part, and each of the divided panel formwork units 10 is capable of relatively moving in the length direction with respect to the formwork frame 4 and is largely drawn.
Placed on top. The panel form unit 10 can be freely moved by placing the rib plate 31 of the bottom plate 3 on the large pull 5, and the rib plate 51 protruding on the large pull 5 has both ends of the rib plate 31 in the beam width direction. It is restrained against the movement in the width direction by hitting against. The movement of the panel form unit 10 at the time of installing the beam form frame and at the time of demolding is performed manually as well as the turnbuckle 13 and the jack laid across the form frame 4 and the panel form unit 10. The turnbuckle 13 is a metal piece 23 fixed to the connecting member 8 as shown in FIG. 4 showing the details of its mounting portion and FIG. 5 which is a bottom view thereof,
Hardware fixed to the bottom plate 3 or its rib plate 31
It will be installed across 24 spaces. In FIG. 4 and FIG. 5, the formwork fixing bolts 11 are attached to the connecting member 7 in a manner of being dropped from above.

The panel formwork unit 10 moves on the large pull 5, and the panel formwork 1, 1 orthogonal to the joint of the pillar and the beam.
The end portion of the side plate 2 hits against the joint portion form 14 installed so as to straddle it, and the rib plate 21 at the end portion is joined with the bolt 15 so that it is placed between columns. The pillars shown in the figure are precast concrete pillars in which concrete is cast up to the level of the bottom of the beam, leaving the joint with the beam, but if already constructed, the joint formwork
It does not have to be made of precast concrete as it allows for 14 installations.

The panel formwork 1 is a panel formwork unit 10, 10
Although it corresponds to the difference in the distance between the pillars by moving the frame form 4 to the form frame 4, the panel form unit 10 at the center of the beam form is
The gap between 10 has a length larger than the expected gap, and the adjustment panel is inscribed in the panel formwork unit 10.
Filled by 16. A support 17 supporting the beam formwork is installed below the adjustment panel 16.

The panel formwork 1 is demolded after a certain period of time has passed since the concrete was poured, and the beam formwork is moved for refilling. However, the adjustment panel 16 is demolded after the panel formwork 1 is demolded. This corresponds to a case where the beam remains attached to the concrete of the beam and the strength of the concrete is insufficiently expressed, and the support 17 is still left after the beam form is moved.

The beam formwork according to claim 2 is supported by connecting support metal pieces 18, 18 which abut against the side face of the constructed pillar to both ends of the beam formwork according to claim 1 in the axial direction of the large pull 5. In addition to 17, the support hardware 18, 18 can also support pillars. Pillars include precast concrete columns and on-site constructed columns.

The large pull 5 is shorter than the distance between the pillars, and the supporting metal parts 18, 18 are connected to the ends on the pillar side. The supporting hardware 18 is connected by bolts or the like so as to be movable in the length direction of the large drawing 5 through a long hole formed in either the large drawing 5 or the supporting metal 18, and after the beam formwork is installed between the pillars, it is moved to the pillar side. By protruding and hitting the side surface of the column, and temporarily fixed to the column, the weight of the beam formwork and part of the load of concrete are applied to the column. An insert 25 for joining the support metal 18 is embedded in advance in the pillar. The support metal 18 projects from the large pull 5 to the pillar side, and is bolted to the insert 25 to be joined to the pillar. A caster 19 is fixed under the large pull 5 for the convenience of moving the beam form.

6 to 9 show a procedure from installation of the beam form to refilling. The beam form is raised by a forklift and installed between columns as shown in FIG. After that, as shown in FIG. 7, the supporting metal pieces 18, 18 of the large pulling 5 are joined to the pillar, and the panel form unit 1 of the panel form 1 is joined.
While moving 0 and 10 to the pillar side to join the end of the side plate 2 on the pillar side to the joint part form 14, the side plate 2 is fixed to the form frame 4 with the form fixing bolts 11, and the adjustment panel 16 Support below 17
To complete the installation of the beam formwork. If support capacity other than the support 17 is required, support 17 'under the tug 5
Is installed.

When the casting of the concrete is completed and the required period has passed, the support 17 'is removed leaving the support 17 as shown in FIG. The beam formwork is lowered by a forklift, moved to a place where recasting is performed by casters 19, and further moved to an upper floor using a work platform for aerial work as shown in FIG. After the refilling of the beam form is completed, the operation returns to FIG. 6, and the operations from FIG. 7 to FIG. 9 are repeated.

[0023]

The form frame and the panel form are separated, the panel form is axially divided into two, and each panel form unit is mounted in the form frame so as to be movable in the axial direction.
Since the side plate of the panel formwork is connected to the bottom plate rotatably around the axis parallel to the axis of the beam, the demolding and installation of the side plate can be rotated independently from the formwork frame while coping with the difference in the distance between columns. It can be done only by itself, and the work of demolding and installing the panel formwork is simplified.

Further, since the formwork frame has sufficient rigidity to resist the lateral pressure of the beam concrete due to the columns and the tie members rigidly joined to each other by pulling out, the formwork frame becomes unnecessary. The width of is reduced, and the possibility of becoming an obstacle when moving or refilling is reduced.

Furthermore, since the panel formwork is divided into two,
The length of the beam form can be shortened after demolding, and the possibility of becoming an obstacle during refilling is reduced.

According to the second aspect of the present invention, since the supporting metal pieces that are fixed to the pillars are connected to the side surfaces of the constructed pillar at both ends in the axial direction of the large pull, the supporting metal pieces are temporarily fixed to the pillars. This allows the beam formwork itself and part of the concrete load to be borne by the columns, reducing the number of supports required.

[Brief description of drawings]

FIG. 1 is an elevational view showing a beam formwork.

FIG. 2 is a plan view of FIG.

FIG. 3 is a partially enlarged view of FIG. 1;

FIG. 4 is an elevation view showing details of a mounting portion of a turnbuckle.

FIG. 5 is a bottom view of FIG. 4;

FIG. 6 is an elevational view showing how the beam form is raised.

FIG. 7 is an elevational view showing a state in which a beam form is installed.

FIG. 8 is an elevational view showing how the beam form is removed from the mold and moved.

FIG. 9 is an elevational view showing how the beam form is refilled.

FIG. 10 is an elevational view showing a conventional beam formwork.

11 is a cross-sectional view of FIG.

[Explanation of symbols]

1 …… Panel formwork, 10 …… Panel formwork unit, 2 ……
Side plate, 21 ... rib plate, 3 ... bottom plate, 31 ... rib plate, 4 ... form frame, 5 ... drawing, 51 ... rib plate, 6 ... pillar, 7 ... connecting material, 8 ...... Connecting material, 9 ...... hinge, 11 ...... form frame fixing bolt, 12 ...... nut, 13 ...... turn buckle, 14 ...... joint form, 15 ......
Bolt, 16 …… Adjustment panel, 17, 17 ′ …… Support, 18
…… Supporting hardware, 19 …… Casters, 20 …… Bolts, 22 ……
Precast concrete board, 23, 24 …… Hardware, 25 ……
insert.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hisao Tanaka 4-51 Ota-cho, Naka-ku, Yokohama-shi, Kanagawa Kashima Construction Co., Ltd. Yokohama Branch (72) Inventor Masaya Fukuda 4-chome, Ota-machi, Naka-ku, Yokohama-shi, Kanagawa Address 51 Kashima Construction Co., Ltd. Yokohama Branch (72) Inventor Toshiyuki Yoshimatsu 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd.

Claims (2)

[Claims] 1. A beam-casting concrete weir comprising a side plate facing each other and a bottom plate extending between lower ends of both side plates, the side plate being rotatably connected to the bottom plate about an axis parallel to the axis of the beam. It consists of a panel formwork with a grooved section and a formwork frame that is assembled separately from the panel formwork on the outer peripheral side of the panel formwork and holds the panel formwork that bears the lateral pressure of the pouring concrete from the outer peripheral side. The panel formwork is divided into two in the axial direction, and each of the divided panel formwork units is mounted in the formwork frame so as to be movable in the length direction with respect to the formwork frame. Located below the side plate,
Large pulls that are connected to each other in parallel in the width direction of the beam, and columns that are rigidly joined to the large pulls that are arranged on the outside of the side plates at intervals in the length direction of the large pulls, and between adjacent columns. Beam formwork made of erection material erected. 2. A support metal fitting, which abuts a side surface of a constructed pillar and is fixed to the pillar, is connected to both ends in the axial direction of the large pull, and the support hardware is temporarily fixed to the pillar and supported by the pillar. The beam formwork according to claim 1, which is a thing.