JP3868336B2 - Molded floor board support member and stepped floor forming method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes a first support portion that supports an end portion of the stepped molded floor plate, and a step at a position lower than the stepped molded floor plate on the end portion side of the stepped molded floor plate supported by the first support portion. Formed floor board support member provided on the main body of the beam-like support member and the second support part for supporting the end portion of the stepped floor board arranged in a step, and the stepped floor is formed using the molded floor board support member The present invention relates to a stepped floor forming method.
[0002]
[Prior art]
If the floor of the building is, for example, reinforced concrete, a formwork that matches the shape of the lower surface of the floor was previously installed from the lower floor so that the support was assembled to a predetermined height and bar arrangement was performed. Afterwards, it is common to cast concrete in the area surrounded by the formwork to form an integrated floor. However, in recent years, it has been possible to improve the efficiency of construction and omit the small beams below the slab. As a technology with the feature that it is possible to secure a wide space, by arranging factory-produced strip-shaped molded floorboards in a predetermined position on the site, placing reinforcement and concrete on it A method of forming a floor may be implemented.
According to such a construction method, when forming a flat floor, it is only necessary to arrange the shaped floor boards so as to be at the same level. For example, it is necessary to form a stepped portion on a part of the floor. In such a case, it is common to form a stepped portion by arranging a shaped floor board having a fixed shape so that a step can be formed.
Conventionally, as this type of molded floor board support member, as shown in FIG. 6, as shown in FIG. 6, the cut H-shaped steel is used as it is as the support member body 20, and the bracket 21 is attached to the lower flange 20a. At the same time, the upper surface of the bracket 21 is configured as a second support portion 7b that supports the end portion of the lower molding floor plate 4C, and the upper surface of the upper flange 20b is supported by the end portion of the upper molding floor plate 4B. In some cases, the first support portion 7a is configured (see, for example, JP-A-8-218534).
Moreover, as a different example, the support member assembled from the lower floor is used as a molded floor board support member, not the support member main body as described above, and the upper support floor board or the lower molding floor board is supported by the support work. There is a stepped floor forming method in which reinforcing bars are placed and concrete is placed thereon to form a stepped floor (see, for example, JP-A-10-317564 and JP-A-11-303284).
[0003]
[Problems to be solved by the invention]
According to the conventional stepped floor forming technology described above, when supporting the support member main body at a predetermined position, the supporting work must be assembled from the lower floor, and the formwork and the like must be assembled according to circumstances. There is a problem that it takes a lot of construction work to form the work and the work efficiency is poor.
Also, support work and positioning of the formwork required skill, and it was not something that anyone could easily carry out.
[0004]
Accordingly, an object of the present invention is to provide a stepped floor forming technique capable of solving the above problems and forming a stepped floor easily and efficiently.
[0005]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a first support portion for supporting an end portion of the stepped molded floor plate, and an end portion side of the stepped molded floor plate supported by the first support portion. In the molded floor board support member in which the beam-shaped support member main body is provided with a second support portion that supports the end of the lower molded floor board that is arranged with a step at a low position, the upper molded floor board and the lower floor A locking portion that can be locked to another molded floor plate arranged in parallel with the molded floor plate, or can be locked to a beam arranged in parallel to the upper molded floor plate and the lower molded floor plate. At the end of the support member body.
[0006]
According to the characteristic configuration of the invention of claim 1, the support member main body is provided with the locking portion, so that another molded floor plate (in parallel with the upper molded floor plate / lower molded floor plate) Alternatively, the supporting member main body can be set at a predetermined position by locking the locking portion to the beam. And the level | step-difference part of a shaping | molding floor board can be easily formed only by making the support member main body support the said upper-forming floor board and a lower-forming floor board.
That is, unlike the conventional case, it is not necessary to assemble a support work from the lower floor in order to install the support member main body in a fixed position, and it becomes possible to efficiently and quickly form a stepped floor. Furthermore, if there is no work with high precision such as height adjustment of the support work, the stepped floor forming work itself becomes simple, and it is difficult to be influenced by the presence or absence of experience.
[0007]
The characteristic configuration of the invention of claim 2 is that the locking portion is a hooking piece for hooking on the another molded floor board or the beam.
[0008]
According to the characteristic configuration of the invention of claim 2, in addition to being able to achieve the function and effect of the invention of claim 1, the support member main body is supported by the another molded floor board (or beam). It is possible to carry out the labor by simply hanging the latch piece on the other molded floor board (or beam), and it becomes possible to form the stepped floor more efficiently and quickly.
[0009]
According to a third aspect of the present invention, there is provided in the support member main body a mold part that becomes a discarded mold frame at a step part between the step-up molded floor board and the step-down molded floor board.
[0010]
According to the characteristic configuration of the invention of claim 3, in addition to being able to achieve the operational effect of the invention of claim 1 or 2, there is a large step between the upper molded floor board and the lower molded floor board. When the positional relationship is such that a gap is generated between both floor boards, the concrete placed on both floor boards can be dammed and integrated by the mold section, and bothered to form a separate mold frame. It is possible to save the time and effort of assembling.
Therefore, it becomes possible to form a stepped floor more efficiently and quickly.
[0011]
The characteristic means of the invention of claim 4 is that a pair of molded floor boards are arranged with a step, and after placing the reinforcement on the top, concrete is placed to form a stepped floor integrated with the molded floor board. In the floor formation method with a level | step difference to do, the shaping | molding floor board support member as described in any one of Claims 1-3 is prepared, and the edge part of the shaping | molding floor board support member is made into a parallel state with respect to the said pair of shaping floor boards. In a state where it is supported by another formed floor plate that is installed, or a beam that is installed in parallel with the pair of molded floor plates, the pair of molded floor plates is provided with a step on the molded floor plate support member. There is a place to support each separately.
[0012]
According to the characteristic means of the invention of claim 4, the end of the molded floor board support member is supported by another molded floor board (or the beam) installed in parallel with the pair of molded floor boards. In the state, since the step is provided on the molded floor board support member to support the pair of molded floor boards separately, as in the past, when the molded floor board support member is installed, the support work is assembled from the lower floor. There is no need to remove the supporting work after the placed concrete is hardened, and a stepped floor can be formed quickly and efficiently. A series of operations for forming a stepped portion can be easily performed, and even an inexperienced person can form a stepped floor.
Furthermore, it becomes possible not to provide a supporting work on the lower floor, and the stepped floor forming work can be advanced while using the space on the lower floor in another process.
As a result, the construction period for the entire building can be shortened.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the parts denoted by the same reference numerals as those in the conventional example indicate the same or corresponding parts.
[0014]
1 to 3 show a situation in which a stepped floor F is formed using an example product (hereinafter simply referred to as a support member) S of the molded floor board support member of the present invention.
[0015]
As shown in FIG. 3, the stepped floor F is configured as a rectangular floor, and the four outer sides are supported by the beams 1. As shown in the drawing, the outer peripheral side “U” -shaped range (hereinafter referred to as a normal portion) 2 in plan view is finished to a reference floor level, and the “U” -shaped normal portion 2 is finished. A central range 3 (hereinafter referred to as the lower section) 3 is finished lower than the reference floor level.
The stepped portion 3 is often provided in a portion that may be formed lower than other floor portions, such as each dwelling unit entrance hall in a housing complex, a bus unit installation portion, and the like.
[0016]
In addition, the stepped floor F is a perforated precast synthetic floor slab that is pre-molded in a factory in any range of the normal part 2 and the step lower part 3 (an example of a molded floor board, hereinafter simply referred to as a synthetic floor slab). 4) are arranged side by side, and as shown in FIG. 2, the composite floor slab 4 is discarded as a formwork, floor reinforcing bars 5 are arranged on it, and concrete 6 is placed to form an integral structure. is there.
[0017]
The composite floor slab 4 is formed in an elongated flat plate shape, and as shown in FIGS. 1 and 2, a plurality of PC steel wires embedded in a plate body 4a made of concrete in a tension state in the longitudinal direction. 4b is provided, and a plurality of hollow holes 4c penetrating the plate body 4a in the longitudinal direction are formed on both sides of the PC steel wire 4b. The prestress is applied by the PC steel wire 4b, so that the strength can be increased and the span can be increased. On the other hand, the hollow hole 4c can be provided to reduce the weight of the composite floor slab 4. It has become.
Of the normal portion 2, the composite floor slab 4 having a length corresponding to the beam-to-beam dimension is used for the “U” -shaped upper portion 2a and lower side portion 2b in the plan view of FIG. The synthetic floor slab 4 used for the upper side 2a and lower side 2b is hereinafter referred to as a normal synthetic floor slab (corresponding to another molded floor slab according to the claims of the present invention) 4A.
Further, the portion sandwiched between the upper side portion 2a and the lower side portion 2b has a stepped portion D configured by providing the support member S at an intermediate portion in the span direction, and the right and left sides with the stepped portion D as a boundary. In addition, composite floor slabs 4 having lengths corresponding to the respective lengths are respectively installed. The composite floor slab 4 installed on the right side of the stepped portion D at the same level as the upper side 2a and the lower side 2b is referred to as a stepped composite floor slab (corresponding to a stepped floor slab) 4B. Further, the composite floor slab 4 installed on the left side of the stepped portion D, that is, the step lower part 3 is referred to as a step-down composite floor slab (corresponding to a step-down molded floor board) 4C.
Each synthetic floor slab 4 has a large number of irregularities 4d on the upper surface (see FIG. 2), and the concrete placed on the synthetic floor slab 4 hardens along the irregularities 4d. Thus, the unity of both is improved, and an appropriate strength of the stepped floor F can be secured.
Moreover, about the said normal synthetic floor slab 4A, concrete is filled into the hollow hole 4c adjacent to the location where the edge part of the said supporting member S is mounted among each hollow hole 4c, and an effective cross-sectional area is increased. The support member S is reinforced so as to ensure the support strength (see FIG. 1).
[0018]
As shown in FIGS. 2 and 4, the support member S is composed of a support member main body 7 formed of C-shaped steel.
The support member main body 7 includes a first support portion 7a that supports an end portion of the upper composite floor slab 4B, and a lower composite floor slab that is disposed with a step at a position lower than the upper composite floor slab 4B. A second support portion 7b that supports the end portion of 4C and a locking portion 7c that can be locked to the side edge portion of each normal composite floor slab 4A facing the stepped lower portion 3 are provided.
[0019]
The first support portion 7 a is formed by welding a chevron steel 8 to the side surface of the C-shaped steel web of the support member body 7 and having one side portion of the chevron steel 8. The angle steel 8 is preferably provided over the entire length (or almost the entire length) of the support member body 7. For example, short angle steel 8 is provided at a plurality of positions spaced in the longitudinal direction of the support member body 7. 8 may be joined.
The second support portion 7 b is configured with a flange portion below the support member body 7.
Moreover, the said latching | locking part 7c is comprised by the latching piece part 9 provided in the state which extended the upper flange part along a longitudinal direction at the both ends of the supporting member main body 7. FIG. Therefore, the supporting member S is arranged on the step portion D by hooking the hooking piece portion 9 on the side edge portion of the normal composite floor slab 4A installed facing the stepped portion 3. Can do. In addition, in this embodiment, the said latching piece part 9 is formed by welding an iron plate to the upper flange part upper surface of the supporting member main body 7 (C-shaped steel).
In addition, the lower flange part, web, and angle steel of C-shaped steel become a discarded formwork of the concrete cast in the upper part, and are called the formwork part 7d.
Further, the installation position of the upper composite floor slab 4B and the lower composite floor slab 4C is several centimeters between the end surface and the web (preferably, 1.25 times the maximum size of the concrete coarse aggregate). The above dimensions are preferably set so as to be separated from each other. By doing so, the concrete is uniformly filled between each composite floor slab and the support member S, and it becomes possible to improve mutual integrity.
[0020]
Next, the procedure for forming the stepped floor F will be described.
[1] The normal composite floor slab 4A is sequentially installed across the beam 1 and the beam 1.
[2] The support member S is installed in a latched state with respect to the two normal composite floor slabs 4A facing the stepped lower portion 3.
[3] The upper composite floor slab 4B is placed in the placement state across the beam 1 and the first support portion 7a, and the lower composite floor slab 4C is placed in the placement state across the beam 1 and the second support portion 7b. To do.
[4] Arrange the floor rebar 5 on each composite floor slab 4 and attach a step-stopping formwork.
[5] Concrete is placed on the stepped lower portion 3 and the two normal portions to form a stepped floor F.
[0021]
According to the support member S of the present embodiment, the support member body 7 can be set at a predetermined position by hooking the latch piece 9 over the normal composite floor slab 4A, and the support member S can be supported. By simply supporting the upper composite floor slab 4B and the lower composite floor slab 4C on the member main body 7, it becomes possible to easily form a stepped portion between the molded floor boards, and bother from the lower floor. Therefore, it is possible to efficiently and quickly form a stepped floor.
[0022]
[Another embodiment]
Other embodiments will be described below.
[0023]
<1> In the previous embodiment, an example in which the molded floor board support member is installed over a pair of normal composite floor slabs 4A installed with the stepped portion 3 interposed therebetween is described. For example, as shown in FIG. One supported portion may be the beam 1. Moreover, the structure of the beam 1 can employ | adopt well-known structures suitably, such as a steel frame structure and a reinforced concrete structure.
Further, the formed floor board support member is not limited to the one made of C-shaped steel, and may be a shaped steel such as I-shaped steel or H-shaped steel. Accordingly, the shapes of the first support portion 7a, the second support portion 7b, the locking portion 7c, and the like can be appropriately changed.
In addition, when using the latching piece part 9 as the latching | locking part 7c, by adjusting the attachment position of the latching piece part 9 with respect to a support member main body up and down, the support member main body of ready-made (ready-made dimension) goods is obtained. While being used, the molded floor board support member can be configured so as to be able to support each step according to the step size of the upper molded floor board and the lower molded floor board. Moreover, even if it uses what comprises a bent iron plate provided with the height adjustment part instead of comprising the latching piece part 9 itself with a flat iron plate, the ready-made support member main body is similarly used. The intended step size can be secured while being used.
<2> The molded floor board is not limited to the perforated precast synthetic floor slab described in the previous embodiment. For example, a concrete synthetic floor board that forms a structure integrally with on-site cast concrete, or steel It may be a discarded formwork, a steel formwork with truss bars, etc., and these are collectively referred to as a molded floor board.
<3> The stepped floor F is not limited to each dimension / quantity relationship described in the previous embodiment, and a plan plan, a cross-sectional plan, and the like can be appropriately changed.
[0024]
In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry.
[Brief description of the drawings]
FIG. 1 is a perspective view of an essential part showing a stepped floor. FIG. 2 is a sectional view of an essential part of the stepped floor. FIG. 3 is a plan view of the stepped floor. FIG. 6 is a cross-sectional view of a main part showing a conventional stepped floor.
DESCRIPTION OF SYMBOLS 1 Beam 4 Molded floor board 4A Molded floor board 4B Upper-stage molded floor board 4C Lower-stage molded floor board 7 Support member main body 7a First support part 7b Second support part 7c Locking part 7d Forming part 9 Hanging piece part D Step part F Step part Floor S with molded floor support member

Claims (4)

A first support portion that supports an end portion of the stepped molded floor plate, and a step is disposed at a position lower than the stepped molded floor plate on the end portion side of the stepped molded floor plate supported by the first support portion. A molded floorboard support member provided on the beam-shaped support member main body with a second support portion that supports an end of the stepped floorboard,
A beam that can be locked to another molded floor plate arranged in parallel to the upper molded floor plate and the lower molded floor plate, or a beam arranged in parallel to the upper molded floor plate and the lower molded floor plate. The molded floor board support member which is provided with the latching | locking part which can be freely latched in the edge part of the said support member main body. 2. The molded floor board support member according to claim 1, wherein the locking portion is a hooking piece that is hooked on the another molded floor board or the beam. 3. The molded floor board support member according to claim 1, wherein a mold frame portion that becomes a discarded mold frame at a step portion between the upper molded floor board and the lower molded floor board is provided in the support member main body. A stepped floor forming method of placing a pair of molded floorboards with a step, placing concrete after placing a step thereon, and forming a stepped floor integrated with the molded floorboard,
The molded floor board support member as described in any one of Claims 1-3 is prepared, and another molded floor board which has installed the edge part of the molded floor board support member in the parallel state with respect to a pair of said molded floor board Or, a stepped floor formation that supports the pair of molded floorboards separately by providing a step on the molded floorboard support member in a state of being supported by a beam installed in parallel with the pair of molded floorboards. Method.

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