JPH0144867B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In steel reinforced concrete structures, the present invention is designed to support the formwork used to form the frame of ceiling beams, floors, etc., the formwork designed to support the load of the suspended scaffold, and the load of the suspended scaffold. The present invention relates to a supporting device for carrying.

Generally, the design of formwork for concrete pouring is related to shoring, and it is necessary to ensure sufficient safety against the load until the concrete structure is completed, taking into consideration the shape and dimensional errors of the completed structure and the structure of the formwork. It must be designed firmly so that it does not go awry. The loads that formwork and shoring receive during construction include loads from the formwork itself, concrete, workers, construction equipment, etc., vertical loads due to impact, wind pressure, slope,
It is extremely difficult to construct a formwork support device that can sufficiently support the lateral loads caused by water pressure, vibrations during work, and the lateral pressure of concrete.

On the other hand, in the beam construction process for steel reinforced concrete structures, such as high-rise buildings, a suspended scaffold is temporarily erected after steel frame processing work, steel frame erection, and temporary fixing work, and this suspended scaffold is used for welding, HTB tightening work, and reinforcement work. After the work was completed, the suspended scaffolding was dismantled and removed. Next, a stepladder, a ladder,
Formwork assembly work, concrete pouring into the formwork, formwork dismantling, and finishing work are carried out in sequence using framed scaffolding. For this reason, in the above case, the suspended scaffolding for steel frame assembly and reinforcement work and the scaffolding for formwork assembly and dismantling are performed separately, resulting in poor work efficiency and a large number of parts, which is extremely costly. This is disadvantageous, and labor saving is particularly desired.

In addition, the formwork is supported by support members from both the vertical and horizontal directions in order to withstand the above loads, and the vertical support members include pipe supports and frameworks that stand up from the ground or lower floor to the bottom of the formwork. Scaffolding, a single square support, and a tie hanger are used, and the assembly and disassembly of these supporting members is extremely troublesome and difficult, and in cases where the height is 4.5 m or more, it is difficult to assemble and disassemble these supporting members. It is nearly impossible to assemble the support member, and if it shakes or tilts during use, it is not only dangerous, but also causes negative effects such as dimensional errors on the formwork. Furthermore, form ties are used as support members for tightening from the lateral direction, but the work of attaching and detaching them is cumbersome and difficult, and the number of parts is large, causing an increase in costs. development is desired.

For this purpose, suspended scaffolding is used, on which a series of beam construction operations can be carried out, from erection of the steel frame to finishing of the concrete and dismantling of the formwork, and special supporting members can be erected from the lower floor or ground surface. A framework forming apparatus has been developed that allows for the assembly and support of formwork without any hassle, is easy to install and remove, has a simple structure, and allows construction of frameworks such as beams and floors of concrete structures at a significantly low cost.

For example, as a molding device for this frame,
The one disclosed in Publication No. 9424 is known,
In this device, the mechanism that supports the load of the formwork and suspended scaffolding consists of four tightening bolts attached to the steel frame, four liner separators attached to these bolts, a cone installed at the bottom of the liner separator, and a liner. It consists of a separator and four tightening bolts that are screwed into the cone and supports the main tension member, so there are many parts, and each part is separate and independent, making it difficult to align each part. , the number of man-hours required to assemble each part is large, which significantly reduces the on-site assembly work, and even when the separator is assembled to the steel frame, this position often does not align with the axis of the bolt inserted from the main member side. The work to correct this is difficult, and if the axes of the separator and bolt are not aligned and the separator is forcibly assembled, the main part may be tilted, the bolt may become twisted, or the main part may be damaged. In order to assemble a separator to a steel frame, four holes are drilled in the steel frame and bolts are inserted through these holes, which makes hole machining difficult, and it is also difficult to center the parts with respect to other parts. There are many parts and each part is separated, making it inconvenient to carry.
This method has drawbacks such as the lack of a guide when inserting the tightening bolt, which causes poor directionality during tightening, and the bolt bending when stress is concentrated on the tightening bolt.

Therefore, the object of the present invention is to have a small number of parts, accurate and easy alignment and centering, and easy assembly.
To provide a support device for carrying the load of formwork and suspended scaffolding in a building frame forming device, which can significantly improve work and prevent bolts from bending.

In order to achieve this object, the present invention connects a large tension member to a steel beam in a removable manner, connects a suspended scaffold below the large tension member, and connects the steel frame with rivets, welding, reinforcement, and molding on the suspended scaffold. In frame forming equipment that continuously performs frame assembly, disassembly, concrete pouring, and finishing work, a fixed piece with at least two connecting rods is fixed to the bottom of a steel beam, and the connecting rods are A cone is fixed to the lower part, a collar is inserted and fixed in the vertical direction into the Ohiki member, and a bolt that supports the Ohiki member is removably inserted into this collar, and the bolt holds the Ohiki member. It is characterized in that it is screwed onto the cone.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in Fig. 1, the frame forming equipment is used to form a concrete-casting form when forming the frame of a steel-framed reinforced concrete structure, such as a high-rise building, by pouring concrete such as floors 1 and beams 2. 3, 4, and 5 are supported by a support device, and at the same time, the steel frame is assembled on a scaffold 6 suspended from this support device.
It is designed to allow reinforcement work, formwork assembly and dismantling, concrete pouring, and finishing work to be carried out continuously.

The formwork support device 7 includes a beam extension member 8 made of horizontal C-shaped channel steel, thick members 9 standing on both sides of the extension member 8, and joists extending in a direction intersecting the extension member 8. support rod 10 and end member 9
A side plate fixing member 11 that is detachably connected to the side plate, and a mounting member 1 that attaches and detaches the large pull member 8 to the steel frame 12 side.
3, and a support beam support member 14 provided on the upper part of the thick member 9.

Brackets 17 having an L-shaped cross section are attached to the upper surface of both sides of the beam extension member 8 through elongated holes 15 and bolts 16.
A socket 18 is fixed to this bracket 17 by welding or the like, and a rectangular column-shaped end member 9 is removably inserted into this socket 18 and stands upwardly, and this end The base end 19 of the support beam support member 14 is removably inserted into the upper part of the thick member 9 via a socket. A U-shaped support frame 21 is fixed to the upper part of the base end 19 of the support beam support member 14 via a beam 20, and a hook piece 23 is attached to the support frame 21 through a pin hole so that the height can be freely adjusted. The end of the supporting beam 24 that is connected and supports the floor formwork 3 is attached to this hook piece 23.
It is designed so that it can be engaged with and supported.

A U-shaped receiving member 5 is provided on the front and rear sides of the socket 18, and a hook is provided at the end of the other side plate fixing member 11. By inserting this hook into the receiving member 5, the large pull member 8 and The side plate fixing member 11 is extended and held in the right angle direction. The side plate fixing member 11 is formed with a plurality of square column-shaped support rods 26 and 27 that intersect vertically and horizontally.

One or more reinforcing plates 28 are fixed to the beam tensioning member 8, and a groove 29 is cut downward in the upper surface of the reinforcing plate 28 and the upper surface of the tensioning member 8. The support rod 10 for the joist is inserted and extends in a direction perpendicular to the main drawer 8, so as to support the lower part of the beam bottom form 5. However, the joist support rod 10 can be used even if it is brought into direct contact with the upper surface of the tension member 8 without being inserted into the groove 29. The support rod 10 may be a single pipe, a square prism or other polygonal prism, or one with a non-slip surface formed on its outer periphery.

One or more collars 30 are inserted and fixed in the vertical direction approximately in the center of the beam tension member 8, and bolts 31 are removably screwed into the collars 30.
Mounting member 13 with this collar 30 and bolt 31
is formed. However, other similar means may be used for this attachment member 13.

On the other hand, the lower surface of the steel beam 12 embedded in the beam 2 is provided with a support device for carrying the load of the formwork and suspended scaffolding according to an embodiment of the present invention. That is, a fixed piece 32 is integrally fixed to the steel beam 12 by welding or the like, and a connecting rod 33 such as a bolt, which is two attachment parts, is fixed to this fixed piece 32 by screws or welding. A cone 34 is integrally fixed to the lower part, and a bolt 31 for holding the tension member inserted into the collar 30 is attached to the cone 34.
The upper end is designed to be removably screwed on. At this time, the bolt 31 passes through a hole drilled in the beam bottom formwork 5.

However, the connecting rod 33 can be connected without using the cone 34.
It can also be used by forming a thread groove in the thread groove and directly screwing the bolt 31 into this thread groove. Next, a bracket 35 is integrally fixed to the center of the lower surface of the beam tension member 8, and a support arm 36 of the hanging scaffold 6 is detachably connected to this bracket 35 via a bolt 37. A horizontal scaffold frame 38 is fixed, and furthermore, a scaffold board 39 and a handrail 40 are fixed on this scaffold frame 38.

Next, we will discuss the process from assembly to disassembly of the frame forming equipment.

When the steel beam 12 is assembled, first, the beam bottom form 5 is placed on the beam extension member 8, and then this extension member is fixed to the cone 34 via bolts 31. At the same time, the hanging scaffold 6 is also fixed to the bracket 35 and suspended. This work can be easily done using a lifter or the like, and once this work is finished, the lifter can be removed.

On the other hand, as another method for attaching the large tension member 8 and the suspended scaffold 6, first, the large tension member 8 is connected to the steel beam 12 on the ground surface via bolts 31 and cones 34, and the large tension member 8 is The suspended scaffold 6 is connected to the bracket 35 in advance, the steel beam 12, the main pull member 8, and the suspended scaffold 6 are lifted together by a crane, etc., and the steel beam 12 is temporarily fixed in this state to form the frame. A large pull member 8 and a hanging scaffold 6 may be installed at the position.

Once the main pull member 8 and the suspended scaffolding 6 are assembled at the concrete pouring site, all subsequent work will be done on the suspended scaffolding 6.
It can be done above.

That is, the scaffolding 6 can be used to assemble the reinforcing bars 4, rivet, weld, and arrange the reinforcing bars, and also to assemble the formwork. That is, the support rod 10 for the joist is inserted into the groove 29 of the large tension member 8, the socket 18 is erected via the bracket 17, the end member 9 is erected in this socket 18, and this end member 9 is provided with a support. The beam support members 14 are connected, and the side plate fixing members 11 are laterally connected via hooks.

The end of the support beam 24 is engaged with the hook piece 23 of the support beam support member 14, the floor formwork 3 is placed on this support member 14, and the side plate fixing member 11
A beam-side formwork 4 is placed inside.

In this state, when concrete is poured on or inside the formworks 3, 4, and 5, the floor part 1 is placed on the support beam 2.
4 is supported, and the beam part 2 is supported by the longitudinal load of the concrete through the beam bottom form 5 and the side beam form by the large tension member 8, the joist support rod 10, the end thick member 9, and the side plate fixing member 11. Carrying lateral loads. And large pull member 8
The load from the formwork and the load related to the suspended scaffolding acting on the structure will be ultimately carried by the bolts 31, the cones 34, the connecting rods 33 as attachment parts, and the fixing pieces 32 together with the steel beams 12.

Next, when the concrete hardens, finishing work on the concrete is carried out on the hanging scaffold 6, and the formwork 3,
4, 5. Dismantle the support rod 10 for the joist, the end member 9, the side plate fixing member 11, etc., and then remove the bolt 31 from the cone 34 using a lifter or the like and remove the tension member 8. In this case, the steel frame 12,
The reinforcing bars 41, cone 34, etc. are buried inside the beam 2.

According to the above-mentioned frame forming equipment, a suspended scaffold is temporarily installed at the same time as the steel frame is assembled, and this scaffold performs a series of tasks such as HTB tightening work, reinforcement work, beam formwork assembly, concrete pouring, and formwork dismantling. In order to be able to perform all of
It eliminates the need for shafts, improves work efficiency, lowers costs, and significantly shortens the construction period.

In addition, compared to the conventional method of assembling scaffolding from the lower floor or the ground, it requires fewer parts, is safer, and allows the lower floor to be used more effectively. Furthermore, the merits of actual construction sites include:
Since no skill is required, it eliminates the shortage of formwork assembly carpenters, reduces the burden of planning, construction, and management on site, shortens construction time, strengthens reliability and safety, and improves the precision of concrete pouring. Achieve and save labor,
This can contribute to cost reduction.

The present invention has the following unique effects. That is, since the connecting rod 33 and the cone 34 are integrally fixed to the fixed piece 32, these supporting devices can be assembled at once by fixing the fixed piece 32 to the steel beam 12. Therefore, the number of assembly steps is significantly improved.

The connecting rod and the fixed piece 32 are integral, and the fact that the cone 34 is fixed in advance to this means that the width between the two connecting rods and the width between the two cones 34 are predetermined. This eliminates the need for positioning each time as in the conventional case.

Since the verticality and centering of the connecting rod and the cone 34 have been determined in advance, there is no need to finely adjust the centering each time as in the conventional art.

Since the position and centering of the connecting rod and cone have been done accurately in advance, the cone 34
It is easy to install the bolt 31 connected to the
As a result, the bolt 31 is always maintained in a vertical state, and at the same time, the tension member 8 is also set horizontally. Therefore, an unbalanced load is not applied to the connecting rod and cone 34, and the connecting rod and cone 34, bolt 31, and large pull member 8
damage can be prevented.

The fixed piece 32, the connecting rod and the cone 34 do not come apart, making it convenient to carry and preventing loss of parts.

Since the collar is vertically fixed through the large tension member, it is possible to center the bolt, and the bolt can be easily attached and detached. Furthermore, the collar itself reinforces the areas where stress is concentrated on the tension member, and since the collar and the tension member can be attached and removed as a unit, the workability of assembly and disassembly is improved.

The collar can be removed together with the tension member, and it is not a consumable item and can be used repeatedly. In addition, the conventional cones that cause burying make post-treatment of concrete difficult when removed alone, but the color of the present invention does not cause burying, so post-treatment of concrete can be done easily and neatly.

Since a collar is provided and the bolt is inserted into this collar, the collar guides the bolt, thereby ensuring the direction of tightening of the bolt, and at the same time preventing deformation such as bending of the bolt, and serves as a reinforcing member for the bolt. It also has benefits.

Since the fixing piece is fixed to the bottom of the steel beam, it can be connected as is without being restricted by the width or vertical length of the steel beam, and short standardized fixing pieces, connecting rods and cones can be connected. can be used.

Since a suspended scaffold is disposed below the main member, riveting, welding, reinforcement, formwork assembly, dismantling, concrete pouring, and finishing operations can be performed continuously on this suspended scaffold.

[Brief explanation of drawings]

The attached drawings relate to embodiments of a frame forming apparatus using the support device of the present invention, in which Fig. 1 is a longitudinal sectional front view of the frame forming apparatus, Fig. 2 is an enlarged perspective view, and Fig. 3 is a partially enlarged front view. , FIG. 4 is a partially cutaway side view. 6... Suspended scaffolding, 7... Formwork support device, 8... Large pull member, 12... Steel beam, 30... Collar, 31... Bolt, 32... Fixing piece, 33... Connecting rod, 34... Cone.

Claims (1)

[Scope of Claims] 1. An Ohiki member is removably connected to a steel beam, a suspended scaffold is connected below the Ohiki member, and steel rivets, welding, reinforcing, and formwork are carried out on the suspended scaffold. In frame forming equipment that continuously performs assembly, demolition, concrete pouring, and finishing work, a fixed piece with at least two connecting rods is fixed to the bottom of a steel beam, and the lower part of the connecting rod is fixed to the bottom of a steel beam. A cone is fixed to the holder, a collar is inserted and fixed in the longitudinal direction into the holder, a bolt for supporting the holder is removably inserted into the collar, and the bolt holds the holder. A support device for carrying the load of the formwork and the suspended scaffold, which is screwed onto the cone. 2. A support device for supporting the load of formwork and suspended scaffolding according to claim 1, wherein the connecting rod is composed of a bolt, and the upper end of the bolt is welded or screwed to the fixed piece. 3. A support device for carrying the load of formwork and suspended scaffolding according to claim 2, wherein the lower part of the bolt is fixed to the cone.