WO2013161065A1 - Formwork apparatus for precast concrete stairway, and casting method for precast concrete stairway - Google Patents

Formwork apparatus for precast concrete stairway, and casting method for precast concrete stairway Download PDF

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Publication number
WO2013161065A1
WO2013161065A1 PCT/JP2012/061417 JP2012061417W WO2013161065A1 WO 2013161065 A1 WO2013161065 A1 WO 2013161065A1 JP 2012061417 W JP2012061417 W JP 2012061417W WO 2013161065 A1 WO2013161065 A1 WO 2013161065A1
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WO
WIPO (PCT)
Prior art keywords
formwork
staircase
unit
precast concrete
landing
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PCT/JP2012/061417
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French (fr)
Japanese (ja)
Inventor
光宏 玉川
信人 春山
Original Assignee
前田建設工業株式会社
フジミ工研株式会社
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Application filed by 前田建設工業株式会社, フジミ工研株式会社 filed Critical 前田建設工業株式会社
Priority to PCT/JP2012/061417 priority Critical patent/WO2013161065A1/en
Publication of WO2013161065A1 publication Critical patent/WO2013161065A1/en

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/22—Moulds for making units for prefabricated buildings, i.e. units each comprising an important section of at least two limiting planes of a room or space, e.g. cells; Moulds for making prefabricated stair units
    • B28B7/225—Moulds for making units for prefabricated buildings, i.e. units each comprising an important section of at least two limiting planes of a room or space, e.g. cells; Moulds for making prefabricated stair units for making stairs or stair units comprising more than one step
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F2011/0203—Miscellaneous features of stairways not otherwise provided for
    • E04F2011/0205—Stairways characterised by the use of specific materials for the supporting structure of the treads
    • E04F2011/021—Stairways characterised by the use of specific materials for the supporting structure of the treads mainly of stone or stone like materials, e.g. concrete; mainly of glass
    • E04F2011/0212—Stairways characterised by the use of specific materials for the supporting structure of the treads mainly of stone or stone like materials, e.g. concrete; mainly of glass mainly of concrete

Definitions

  • the present invention relates to a formwork device for a precast concrete staircase and a method for forming a precast concrete staircase.
  • a precast concrete staircase construction method in which one side in the width direction of a precast concrete staircase form is an open surface, and concrete is cast from the open surface.
  • the surface of the concrete forming the precast concrete staircase, the tread (fumitsura) part, the step back part, etc. can be finished smoothly, but the formwork area increases and the formwork cost increases. Tends to be bulky.
  • a conventional precast concrete staircase formwork device one that integrally forms a stair including a landing is known.
  • the dimensions of the stairs kick-up part, tread part, etc. are different depending on the building specifications.
  • the dimensions of the stair-up part and the tread part may be changed. Therefore, if the entire formwork that forms the staircase and the landing part of the staircase is integrally formed as in the conventional formwork, the entire formwork is changed each time the design specifications of the kick-up dimensions and tread dimensions are changed. Had to be remade. As a result, there is a problem that the manufacturing cost of the mold becomes enormous, and it takes a lot of time and labor to reassemble the mold apparatus. On the other hand, the landing area of the staircase has a uniform shape and size, and it can be said that the design specifications are less likely to be changed compared to the staircase section.
  • the present invention has been made in view of the above-described conventional problems, and an object thereof is to provide design specifications such as a kick-up dimension and a tread dimension in a formwork apparatus for forming a precast concrete staircase including a landing.
  • design specifications such as a kick-up dimension and a tread dimension in a formwork apparatus for forming a precast concrete staircase including a landing.
  • the present invention is a formwork device for a precast concrete staircase comprising a gantry and a formwork member that is supported by the gantry and for forming a precast concrete staircase, wherein the formwork member is A stairs part formwork unit for forming the stairs part of the precast concrete staircase and detachably provided on the gantry, and detachably provided at at least one end of the staircase part formwork unit.
  • a landing part forming mold unit for forming the landing part.
  • the formwork apparatus configured as described above includes a staircase part formwork unit and a landing part formwork unit, and each formwork unit is detachable from each other. Furthermore, since the staircase form unit according to the present invention is also detachably fixed to the gantry, only the staircase formwork unit can be replaced as necessary.
  • the landing part when comparing the stairs part and the landing part among precast concrete stairs, the landing part is often uniform in shape, and the standard dimensions are often used for the dimensions. Therefore, even if the construction properties are different, there are many cases where the specifications of the landing are the same.
  • the staircase that includes a kick-up and tread, it is considered that specifications such as the kick-up dimensions and tread dimensions are often changed due to different construction properties or changing the floor height within the same construction property. It is done.
  • the formwork apparatus it is possible to replace only the staircase formwork unit with one having different kick-up dimensions and tread dimensions. Therefore, in the past, when the kick-up dimension, the tread surface dimension, the number of steps, etc. of the staircase portion were changed, the entire formwork member had to be reworked. Only can be replaced selectively. Therefore, it is possible to reduce the manufacturing cost of the formwork compared to the case where the entire formwork is remanufactured each time the staircase specification is changed as before, and the labor required to reassemble the formwork device. Can be reduced and the time can be shortened.
  • the staircase formwork unit removed from the formwork device by replacing the staircase formwork unit may be stocked in a stock yard or the like. According to this, when constructing a property with the same design specification of the staircase in the future, the stocked staircase formwork unit can be reused. In this way, it is economically advantageous to divert the staircase formwork unit.
  • the staircase unit mold unit not only the staircase unit mold unit but also the landing unit mold unit may be detachably attached to the frame. According to this, when the design specification of the landing part of the precast concrete staircase is changed, it becomes possible to easily replace the form unit for the landing part.
  • the landing form mold unit may be detachably connected to both ends of the staircase form unit in the longitudinal direction.
  • the gantry has a horizontal support part for horizontally supporting the landing part form unit, and the horizontal support part is configured such that a support height of the landing part form unit is adjustable. Also good.
  • the support height which supports the formwork unit for landing parts can be adjusted freely according to the floor height of a precast concrete staircase. That is, even if the floor height of the stairs to be formed by the mold apparatus is changed, it is possible to flexibly cope with the formation of the stairs having a desired floor height.
  • the present invention can be regarded as one aspect of a method for forming a precast concrete staircase. That is, the present invention is a method for forming a precast concrete staircase using a formwork device for a precast concrete staircase comprising a gantry and a formwork member supported by the gantry, wherein the formwork member includes the gantry And a stairs part mold unit for forming the stair part of the precast concrete staircase, and a detachable part at least one end of the stair part mold unit, A precast concrete staircase that replaces the staircase formwork unit with one that conforms to the specifications of the staircase portion when forming the precast concrete staircase. This is a molding method.
  • the formwork members in a formwork device for a precast concrete staircase, when forming a precast concrete staircase having different specifications such as a kick-up dimension and a tread surface dimension, the formwork members can be partially and selectively replaced.
  • the manufacturing cost of the mold reduce the labor required to reassemble the mold apparatus, and shorten the time.
  • FIG. 1 is an overall perspective view of a formwork device 1 for a precast concrete staircase according to the present embodiment.
  • FIG. 2 is an exploded view of the formwork apparatus 1 according to the present embodiment.
  • FIG. 3 is a side view of the mold apparatus 1 according to the present embodiment.
  • the formwork apparatus 1 is installed, for example, in a precast concrete (PC) factory, and is used for forming a precast concrete staircase.
  • PC precast concrete
  • the formwork apparatus 1 has a formwork member 2 for forming a precast concrete staircase by pouring concrete, and a gantry 3 for supporting the formwork member 2.
  • the gantry 3 is configured by an appropriate frame member being framed.
  • the frame member for example, a steel material such as H-shaped steel can be suitably used, but is not limited thereto.
  • the mold member 2 mainly includes a first landing part form unit 21, a second landing part form unit 22, a staircase form unit 23, and a lid member 24.
  • the first landing part form unit 21 and the second landing part form unit 22 are form unit for forming the landing part of the precast concrete staircase.
  • the staircase part formwork unit 23 is a formwork unit for forming a staircase part including a precast concrete staircase.
  • the first landing part form unit 21 and the second landing part form unit 22 are detachably connected to both ends of the staircase form unit 23, respectively.
  • the lid member 24 includes, for example, a first lid member 24A and a second lid member 24B, and is attachable to and detachable from the staircase formwork unit 23.
  • 1 and 3 show a state in which the lid member 24 is mounted on the staircase formwork unit 23 in a state where the staircase formwork unit 23 is supported and fixed to the gantry 3. As described above, when the lid member 24 is attached to the staircase formwork unit 23, the upper opening (surface) of the staircase formwork unit 23 opened upward is closed.
  • the staircase part mold unit 23 has a pair of side molds 231, 231 and a step forming metal plate 232 connecting them.
  • the step-forming metal plate 232 is a formwork surface for forming the kick-up portion and the tread portion of the precast concrete staircase, and a plurality of metal plates processed into an L shape are continuously connected. Both ends of the step forming metal plate 232 in the width direction are joined to the side molds 231 and 231 by welding or the like, for example.
  • the side molds 231 and 231 of the staircase unit mold unit 23 are composed of a mold body part 233 and a base part 234.
  • the base portion 234 is supported by being placed and fastened on the gantry 3 (specifically, a staircase portion support gantry 33 described later).
  • the formwork body 233 is formed as an upper structure of the base part 234, and the formwork body 233 and the above-described step forming metal plate 232 are joined.
  • the upper edge portion 233A of the mold body portion 233 forms an opening edge of the upper opening portion of the staircase portion mold unit 23.
  • Bolt holes and the like for fastening the first lid member 24A and the second lid member 24B are formed in the upper edge portion 233A, and the lid members 24A and 24B are formed on the upper edge of the staircase formwork unit 23, respectively. It can be attached to the part 233A.
  • the first landing part formwork unit 21 has a bottom plate 211 and a side formwork 212.
  • the bottom plate 211 is supported by being placed and fastened on the gantry 3 (specifically, a first landing stage support gantry 31 described later).
  • the side mold 212 is a three-frame formed by framing three steel materials, and is detachably connected to the pair of side molds 231, 231 in the staircase mold unit 23. Yes.
  • yen of FIG. 3 expands and represents the connection part of the mold unit 23 for staircase parts, and the mold unit 21 for 1st landing parts.
  • the staircase part formwork unit 23 and the first landing part formwork unit 21 are fastened by a fastener 4 including flanges formed on both sides thereof, such as bolts and nuts. Thereby, the mold unit 23 for staircases and the mold unit 21 for 1st landing parts can be connected (connected) removably.
  • the second landing part formwork unit 22 has substantially the same structure as the first landing part formwork unit 21.
  • the second landing part formwork unit 22 includes a bottom plate 221 and a side formwork 222.
  • the bottom plate 221 is supported by being placed and fastened to the gantry 3 (specifically, a second landing stage support gantry 32 described later).
  • the side mold 222 is a three-frame formed by framing three steel materials, and is detachably connected to the pair of side molds 231 and 231 in the staircase mold unit 23. Yes.
  • the 2nd connection part enclosed with the broken-line circle of FIG. 3 expands and shows the connection part of the mold unit 23 for staircase parts, and the mold unit 22 for 2nd landing parts.
  • the staircase part formwork unit 23 and the second landing part formwork unit 22 are fastened by a fastener 5 including flanges formed on both sides thereof, such as bolts and nuts. Thereby, the mold unit 23 for staircase parts and the mold unit 22 for 2nd landing parts can be connected (connected) removably.
  • a precast concrete staircase including a landing is provided by detachably connecting three formwork units such as a first landing part form unit 21, a second landing part form unit 22, and a staircase form unit 23.
  • the formwork member 2 that defines the entire shape is configured.
  • the formwork member 2 according to the present embodiment has a so-called counter-strike specification in which the tread surface of the stairs faces downward when the mold member 2 is supported and fixed to the gantry 3.
  • the gantry 3 mainly includes a first landing part support gantry 31, a second landing part support gantry 32, a staircase part support gantry 33, and a base frame 34.
  • the base frame 34 is a member located in the lowermost layer among the frame members constituting the gantry 3, and is configured by framing a plurality of horizontal members.
  • the base frame 34 is placed or fastened at a horizontal installation location such as the ground, a concrete surface, a floor slab or the like.
  • the first landing part support base 31, the second landing part support base 32, and the stair part support base 33 are each erected from the base frame 34, and from one end side of the base frame 34 in the long side direction,
  • the first landing part support base 32, the staircase part support base 33, and the second landing part support base 32 are arranged in this order.
  • the first landing part support base 31, the second landing part support base 32, and the staircase support base 33 are respectively the first landing part form unit 21 and the second landing part form unit 22 described above.
  • the first landing stage support pedestal 31 has a horizontal support frame 311 that is stretched horizontally so as to connect the upper ends of a plurality of support columns standing upright with respect to the base frame 34.
  • the horizontal support frame 311 is framed, and the bottom plate 211 of the first landing part form unit 21 is placed and fastened thereon.
  • the staircase support frame 33 has an oblique support frame 331 extending obliquely from the base frame 34.
  • the oblique support frame 331 is supported by, for example, a support column that stands vertically from the base frame 34.
  • a side mold 231 (base 234) in the staircase formwork unit 23 is placed and fastened to the oblique support frame 331.
  • the second landing stage support frame 32 includes a fixed support part 321 and a floor height adjustment support part 322.
  • the fixed support portion 321 includes a plurality of support columns 321A standing vertically from the base frame 34, and a horizontal member 321B joined to the support columns 321A and the oblique support frame 331.
  • the floor height adjustment support portion 322 is installed on the upper portion of the fixed support portion 321 as an upper structure of the fixed support portion 321 and includes a plurality of height adjustment pieces 322A and a horizontal support portion 322B.
  • the third connecting portion surrounded by a broken-line circle shown in FIG. 3 is an enlarged view of the connecting portion between the fixed support portion 321 and the floor height adjusting support portion 322.
  • the height adjusting piece 322A is fastened to the horizontal member 321B and the horizontal support portion 322B on the fixed support portion 321 side by a fastener 6 including bolts, nuts, and the like.
  • a joining piece 322C projects downward from a position of the horizontal support portion 322B where the height adjusting piece 322A is fastened.
  • the height adjusting piece 322 ⁇ / b> A is fastened to the horizontal member 321 ⁇ / b> B via the fastener 7.
  • the bolt hole formed on the height adjusting piece 322A side and the bolt hole formed on the joining piece 322C side are aligned, and the fastener 6 is aligned. Realized by fastening.
  • the bottom plate 221 of the second landing part part form unit 22 is placed and fastened to the horizontal support part 322B.
  • a plurality of types of height adjusting pieces 322A having different lengths are prepared.
  • the height adjustment piece 322A to be used is selected according to the floor height of the precast concrete stairs to be molded (manufactured) by the formwork apparatus 1, and the height adjustment piece 322A is replaced, By removing the height adjusting piece 322A, it is possible to flexibly cope with a change in the height of the precast concrete staircase.
  • FIG. 4 is a diagram illustrating a procedure for placing concrete into the mold member 2.
  • illustration of reinforcing bars arranged inside the mold member 2 is omitted.
  • the concrete placement procedure is as follows: second landing stage formwork unit 22 (CON1) ⁇ lower layer part (CON2) of staircase part formwork unit 23 ⁇ upper part part (CON3) of staircase part formwork unit 23 ⁇ first landing place This is performed in the order of the part mold unit 21 (CON4).
  • both the first lid member 24 ⁇ / b> A and the second lid member 24 ⁇ / b> B are removed from the staircase formwork unit 23 at the start of concrete pouring.
  • the time required for placing concrete into the second landing part form unit 22 (CON1) is, for example, about 5 minutes.
  • the first lid member 24A is attached to the stair part form unit 23, and then the stair part form unit 23 Concrete is driven into the lower layer (CON2).
  • the interval from the completion of CON1 implantation to the start of CON2 implantation is, for example, about 8 minutes.
  • the time required for placing concrete into the lower layer part (CON2) of the staircase part formwork unit 23 is, for example, about 12 minutes.
  • the concrete is placed into the above-described CON1 to CON4 while the concrete is compacted by a vibrator.
  • the concrete placing procedure described in FIG. 4 shows an example, and it is needless to say that a placing procedure different from the above may be adopted. Needless to say, the time and interval required for placing concrete into each part can be changed as appropriate.
  • the staircase part formwork unit 23 for the formwork member 2 is a first landing part formwork unit 21 and a second landing part formwork unit 22.
  • the feature is that it is detachably connected to each of the above.
  • the staircase part formwork unit 23, the first landing part formwork unit 21, and the second landing part formwork unit 22 are also detachably provided to the gantry 3. By doing in this way, it becomes possible to replace each formwork unit by a unit unit partially and selectively as needed.
  • the landing part formed by the staircase part formwork unit 23
  • the landing part part formed by the first landing part formwork unit 21 and the second landing part formwork unit 22 the landing part
  • the shape of the part is uniform, and the standard dimension is often used for the dimension.
  • the construction height is different because the construction properties are different or the floor height is changed even within the same construction property, and in that case, the staircase formwork is changed. It is necessary to change the specifications of the unit 23.
  • the formwork apparatus 1 for example, it is possible to replace only the staircase part formwork unit 23 with one having different kick-up dimensions and tread surface dimensions. Therefore, in the conventional formwork apparatus, when the kicking dimension of the staircase portion, the tread surface dimension, the number of steps, and the like are changed, the entire formwork member is forced to be remodeled. According to the formwork apparatus 1 according to the above, one or a plurality of units can be arbitrarily replaced from among the formwork units 21 to 23 as necessary. In particular, when the height of the staircase to be molded, the size of the tread surface, the number of steps, or the like is changed in the mold apparatus 1, only the staircase formwork unit 23 can be replaced, which is highly convenient.
  • the staircase part formwork unit 23 removed from the formwork device 1 by replacing the staircase part formwork unit 23 may be stocked, for example, in a stockyard.
  • the staircase formwork unit 23 thus stocked can be reused in the future when constructing a property having the same staircase design specifications. That is, according to the formwork apparatus 1 which concerns on this embodiment, it is possible to divert the step part formwork unit 23 and it is economically excellent.
  • the staircase formwork unit 23 is stocked in the stock yard, it is preferable to stock the staircase forming metal plate 232 so that the concrete placing surface is on the lower side. Thereby, it can suppress that the surface into which concrete is poured among the metal plates 232 for a step forming rusts with rain etc.
  • the formwork apparatus 1 not only the staircase part formwork unit 23 but also the first landing part formwork unit 21 and the second landing part formwork unit 22 are detachably provided to the gantry 3. Therefore, when the dimensions of the landing stage of the stairs are changed, the first landing part form unit 21 and / or the second landing part form unit 22 can be easily replaced.
  • FIG. 3 is a side view which shows the modification of the formwork apparatus 1 which concerns on embodiment.
  • a case where a staircase having a higher floor height is formed as compared with the specification shown in FIG. 3 will be described as an example.
  • the height adjusting piece 322A interposed between the fixed support portion 321 and the floor height adjusting support portion 322 is used.
  • the horizontal support 322B is directly fixed on the fixed support 321 by changing the type or removing the height adjusting piece 322A itself.
  • the height adjusting piece 322 ⁇ / b> A interposed between the horizontal member 321 ⁇ / b> B and the horizontal support 322 ⁇ / b> B is removed, and the horizontal support 322 ⁇ / b> B is directly placed on the fixed support 321. , Have concluded.
  • bottom plate height separation dimension in the vertical direction between the surface of the bottom plate 211 in the first landing part formwork unit 21 and the surface of the bottom plate 221 in the second landing part formwork unit 22 (hereinafter referred to as “bottom plate height separation dimension”).
  • the bottom plate height separation dimension matches the floor height of the stairs after molding.
  • the bottom plate height separation dimension can be freely changed according to the floor height of the precast concrete staircase, and both dimensions can be matched.
  • a plurality of bolt holes are provided in the height direction (material axis direction) of the height adjustment piece 322A and / or the joining piece 322C, and the bolt hole through which the fastener 6 is inserted is selected, thereby separating the bottom plate height.
  • a jack-up device is interposed between the horizontal support portion 322B and the horizontal member 321B, and the jack-up device is actuated to operate the horizontal support portion 322B. You may change a baseplate height separation dimension by changing the distance between the base materials 321B.
  • the staircase part formwork unit 23 if the one that matches the design specifications of the staircase part is stocked in the stock yard, it is reused. Otherwise, only the staircase part formwork unit 23 is manufactured. . Then, the staircase formwork unit 23 supported by the gantry 3 is replaced with a staircase formwork unit 23A that matches the specifications after the change in floor height. Thereafter, as described above, the structural reinforcing bars are arranged in the internal space of the mold member 2 and the concrete is driven into the mold member 2. Thereby, the precast concrete staircase from which specifications, such as a floor height, a kick-up dimension, a tread surface dimension, differ, can be fabricated.
  • the distance between the pair of side molds 231 and 231 in the staircase unit mold unit may be adjustable.
  • mold is changed, the staircase which has a desired width
  • the landing unit formwork unit is detachably connected to both ends of the staircase unit mold unit 23, but the landing unit mold is provided only at one of the ends.
  • the frame unit may be detachably connected.

Abstract

A formwork apparatus (1) for a precast concrete stairway is provided with: a base frame (3); and a formwork member (2) for casting the precast concrete stairway, said formwork member (2) being supported by the base frame (3). The formwork member (2) has: a step formwork unit (23) for casting steps of the precast concrete stairway, said step formwork unit (23) being detachably provided to the base frame (3); and landing formwork units (21, 22) for casting landings of the precast concrete stairway, said landing formwork units (21, 22) being detachably provided to at least one end of the step formwork unit (23).

Description

プレキャストコンクリート階段用の型枠装置、及びプレキャストコンクリート階段の成形方法Formwork device for precast concrete staircase and method for forming precast concrete staircase
　本発明は、プレキャストコンクリート階段用の型枠装置、及びプレキャストコンクリート階段の成形方法に関する。 The present invention relates to a formwork device for a precast concrete staircase and a method for forming a precast concrete staircase.
　従来より、予め工場等でプレキャスト（鉄筋）コンクリート部材として階段部分を製作し、製作したプレキャストコンクリート階段を施工現場に搬入して設置する工法が広く行われている。 Conventionally, a method of manufacturing a staircase portion as a precast (steel reinforced) concrete member in advance in a factory or the like, and carrying the manufactured precast concrete staircase to a construction site has been widely performed.
　例えば、プレキャストコンクリート階段用型枠の幅方向の一方側を開放面とし、この開放面からコンクリートを打設するプレキャストコンクリート階段の施工方法が公知である。この施工方法によれば、プレキャストコンクリート階段の蹴上げ部、踏面（ふみつら）部、段裏部等を形成する部分のコンクリート表面を平滑に仕上げることができるものの、型枠面積が多くなり型枠費用が嵩みやすい。また、従来におけるプレキャストコンクリート階段の型枠装置として、踊り場部を含めて階段を一体成形するものが公知である。 For example, a precast concrete staircase construction method is known in which one side in the width direction of a precast concrete staircase form is an open surface, and concrete is cast from the open surface. According to this construction method, the surface of the concrete forming the precast concrete staircase, the tread (fumitsura) part, the step back part, etc. can be finished smoothly, but the formwork area increases and the formwork cost increases. Tends to be bulky. Also, as a conventional precast concrete staircase formwork device, one that integrally forms a stair including a landing is known.
特開平５－３１１８３６号公報JP-A-5-311836
　ところで、階段の蹴上げ部、踏面部等の寸法は、建物の仕様によって夫々異なる場合が多い。また、同一建物においても階高が異なると、階段の蹴上げ部や踏面部の寸法が変更されることもある。従って、従来の型枠のように、階段の階段部と踊り場部とを成形する型枠全体を一体に構成したのでは、蹴上げ寸法や踏面寸法の設計仕様が変更される度に型枠全体を作り替えることを余儀なくされていた。その結果、型枠の製作費用が膨大となり、また、型枠装置を組み直すために多大な時間と手間が掛かるといった問題がある。一方、階段の踊り場部は、その形状や寸法が画一的であり、階段部に比べてその設計仕様が変更される機会は少ないといえる。 By the way, there are many cases in which the dimensions of the stairs kick-up part, tread part, etc. are different depending on the building specifications. In addition, even if the floor height is different in the same building, the dimensions of the stair-up part and the tread part may be changed. Therefore, if the entire formwork that forms the staircase and the landing part of the staircase is integrally formed as in the conventional formwork, the entire formwork is changed each time the design specifications of the kick-up dimensions and tread dimensions are changed. Had to be remade. As a result, there is a problem that the manufacturing cost of the mold becomes enormous, and it takes a lot of time and labor to reassemble the mold apparatus. On the other hand, the landing area of the staircase has a uniform shape and size, and it can be said that the design specifications are less likely to be changed compared to the staircase section.
　本発明は、上記した従来の問題に鑑みてなされてものであって、その目的は、踊り場を含めてプレキャストコンクリート階段を成形するための型枠装置において、蹴上げ寸法や踏面寸法等の設計仕様が異なるプレキャストコンクリート階段を成形する際に、型枠部材を部分的かつ選択的に入れ替えることを可能とし、以って型枠の製作コストの抑制、型枠装置を組み直すために要する労力の軽減や時間の短縮を可能とする技術を提供することにある。 The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide design specifications such as a kick-up dimension and a tread dimension in a formwork apparatus for forming a precast concrete staircase including a landing. When forming different precast concrete staircases, it is possible to partially and selectively replace the formwork members, thereby reducing the production cost of the formwork and reducing the labor and time required to reassemble the formwork equipment. It is to provide a technology that can shorten the time.
　本発明では、上記課題を解決するために以下の手段を採用する。すなわち、本発明は、架台と、前記架台に支持されると共にプレキャストコンクリート階段を成形するための型枠部材と、を備えるプレキャストコンクリート階段用の型枠装置であって、前記型枠部材は、前記架台に着脱自在に設けられると共に前記プレキャストコンクリート階段の階段部を成形するための階段部用型枠ユニットと、前記階段部用型枠ユニットの少なくとも一端に着脱自在に設けられ、前記プレキャストコンクリート階段の踊り場部を成形するための踊り場部成形用型枠ユニットと、を有する。 In the present invention, the following means are adopted in order to solve the above problems. That is, the present invention is a formwork device for a precast concrete staircase comprising a gantry and a formwork member that is supported by the gantry and for forming a precast concrete staircase, wherein the formwork member is A stairs part formwork unit for forming the stairs part of the precast concrete staircase and detachably provided on the gantry, and detachably provided at at least one end of the staircase part formwork unit. A landing part forming mold unit for forming the landing part.
　上記のように構成された型枠装置は、階段部用型枠ユニット及び踊り場部用型枠ユニットを含んで構成されているところ、各型枠ユニット同士は互いに着脱自在となっている。更に、本発明に係る階段部用型枠ユニットは、架台に対しても着脱自在に固定されているため、必要に応じて階段部用型枠ユニットのみを入れ替えることができる。 The formwork apparatus configured as described above includes a staircase part formwork unit and a landing part formwork unit, and each formwork unit is detachable from each other. Furthermore, since the staircase form unit according to the present invention is also detachably fixed to the gantry, only the staircase formwork unit can be replaced as necessary.
　例えば、プレキャストコンクリート階段のうち、階段部と踊り場部とを比較すると、踊り場部は形状は画一的であることが多く、その寸法についても標準寸法が用いられる場合が少なくない。よって、施工物件が異なったとしても、踊り場部の仕様が同一である場合が少なくない。一方、蹴上げや踏面を含む階段部に関しては、施工物件が異なったり或いは同じ施工物件内においても階高が変更されることで、蹴上げ寸法や踏面寸法等の仕様が変更されることが多いと考えられる。 For example, when comparing the stairs part and the landing part among precast concrete stairs, the landing part is often uniform in shape, and the standard dimensions are often used for the dimensions. Therefore, even if the construction properties are different, there are many cases where the specifications of the landing are the same. On the other hand, with regard to the staircase that includes a kick-up and tread, it is considered that specifications such as the kick-up dimensions and tread dimensions are often changed due to different construction properties or changing the floor height within the same construction property. It is done.
　これに対して、本発明に係る型枠装置によれば、階段成形用型枠ユニットのみを、蹴上げ寸法や踏面寸法が異なるものに入れ替えることが可能である。従って、従来では階段部の蹴上げ寸法、踏面寸法、段数等が変更された場合に型枠部材全体を作り替えることを余儀なくされていたのに対して、本発明によれば、階段部用型枠ユニットのみを選択的に交換することができる。従って、従来のように階段の仕様が変更される度に型枠全体を製作し直す場合に比べて、型枠の製作コストを低減することができ、また、型枠装置を組み直すために要する労力の軽減や時間の短縮を実現することができる。 On the other hand, according to the formwork apparatus according to the present invention, it is possible to replace only the staircase formwork unit with one having different kick-up dimensions and tread dimensions. Therefore, in the past, when the kick-up dimension, the tread surface dimension, the number of steps, etc. of the staircase portion were changed, the entire formwork member had to be reworked. Only can be replaced selectively. Therefore, it is possible to reduce the manufacturing cost of the formwork compared to the case where the entire formwork is remanufactured each time the staircase specification is changed as before, and the labor required to reassemble the formwork device. Can be reduced and the time can be shortened.
　なお、階段部用型枠ユニットの入れ替えによって、型枠装置から取り外された階段部用型枠ユニットはストックヤード等にストックしておいてもよい。これによれば、将来、階段部の設計仕様が同一の物件を施工する際に、ストックしておいた階段部用型枠ユニットを再利用することが可能である。このように、階段部用型枠ユニットを転用することにより、経済的に有利である。 It should be noted that the staircase formwork unit removed from the formwork device by replacing the staircase formwork unit may be stocked in a stock yard or the like. According to this, when constructing a property with the same design specification of the staircase in the future, the stocked staircase formwork unit can be reused. In this way, it is economically advantageous to divert the staircase formwork unit.
　更に、本発明においては、階段部用型枠ユニットのみならず、踊り場部用型枠ユニットも架台に対して着脱自在に設けられてもよい。これによれば、プレキャストコンクリート階段の踊り場部の設計仕様が変更された場合に、踊り場部用型枠ユニットを容易に入れ替えることが可能となる。なお、本発明に係る型枠装置においては、階段部用型枠ユニットの長手方向の両端に踊り場部用型枠ユニットが着脱自在に連結されていてもよい。 Furthermore, in the present invention, not only the staircase unit mold unit but also the landing unit mold unit may be detachably attached to the frame. According to this, when the design specification of the landing part of the precast concrete staircase is changed, it becomes possible to easily replace the form unit for the landing part. In the formwork apparatus according to the present invention, the landing form mold unit may be detachably connected to both ends of the staircase form unit in the longitudinal direction.
　また、前記架台は、前記踊り場部用型枠ユニットを水平に支持する水平支持部を有し、前記水平支持部は、前記踊り場部用型枠ユニットの支持高さが調節自在に構成されていてもよい。このように構成することにより、プレキャストコンクリート階段の階高に応じて、踊り場部用型枠ユニットを支持する支持高さを自在に調節することができる。すなわち、型枠装置によって成形する階段の階高が変更されても柔軟に対応し、所望の階高を有する階段を成形することが可能となる。 The gantry has a horizontal support part for horizontally supporting the landing part form unit, and the horizontal support part is configured such that a support height of the landing part form unit is adjustable. Also good. By comprising in this way, the support height which supports the formwork unit for landing parts can be adjusted freely according to the floor height of a precast concrete staircase. That is, even if the floor height of the stairs to be formed by the mold apparatus is changed, it is possible to flexibly cope with the formation of the stairs having a desired floor height.
　また、本発明は、プレキャストコンクリート階段の成形方法の一側面として捉えることができる。すなわち、本発明は、架台と、前記架台に支持される型枠部材とを備えるプレキャストコンクリート階段用の型枠装置を用いたプレキャストコンクリート階段の成形方法であって、前記型枠部材は、前記架台に着脱自在に設けられると共に前記プレキャストコンクリート階段の階段部を成形するための階段部用型枠ユニットと、前記階段部用型枠ユニットの少なくとも一端に着脱自在に設けられ、前記プレキャストコンクリート階段の踊り場部を成形するための踊り場部用型枠ユニットと、を有し、前記プレキャストコンクリート階段を成形する際、前記階段部用型枠ユニットを前記階段部の仕様に適合するものに入れ替えるプレキャストコンクリート階段の成形方法である。 Further, the present invention can be regarded as one aspect of a method for forming a precast concrete staircase. That is, the present invention is a method for forming a precast concrete staircase using a formwork device for a precast concrete staircase comprising a gantry and a formwork member supported by the gantry, wherein the formwork member includes the gantry And a stairs part mold unit for forming the stair part of the precast concrete staircase, and a detachable part at least one end of the stair part mold unit, A precast concrete staircase that replaces the staircase formwork unit with one that conforms to the specifications of the staircase portion when forming the precast concrete staircase. This is a molding method.
　なお、本発明における課題を解決するための手段は、可能な限り組み合わせて採用することができる。 In addition, the means for solving the problems in the present invention can be employed in combination as much as possible.
　本発明によれば、プレキャストコンクリート階段用の型枠装置において、蹴上げ寸法や踏面寸法等の仕様が異なるプレキャストコンクリート階段を成形する際に型枠部材を部分的かつ選択的に入れ替えることができ、以って型枠の製作コストの抑制、型枠装置を組み直すために要する労力の軽減や時間の短縮が可能となる。 According to the present invention, in a formwork device for a precast concrete staircase, when forming a precast concrete staircase having different specifications such as a kick-up dimension and a tread surface dimension, the formwork members can be partially and selectively replaced. Thus, it is possible to reduce the manufacturing cost of the mold, reduce the labor required to reassemble the mold apparatus, and shorten the time.
実施形態に係る型枠装置の全体斜視図である。It is a whole perspective view of the formwork apparatus concerning an embodiment. 実施形態に係る型枠装置の分解図である。It is an exploded view of the formwork apparatus concerning an embodiment. 実施形態に係る型枠装置の側面図である。It is a side view of the formwork apparatus concerning an embodiment. 型枠部材へのコンクリートの打込み手順を例示する図である。It is a figure which illustrates the placement procedure of the concrete to a formwork member. 実施形態に係る型枠装置の変形例を示す側面図である。It is a side view which shows the modification of the formwork apparatus which concerns on embodiment.
　ここで、本発明に係るプレキャストコンクリート階段を成形するための型枠装置の実施形態について、図面に基づいて説明する。本実施形態に記載されている構成要素の寸法、材質、形状、その相対配置等は、特に特定的な記載がない限りは、発明の技術的範囲をそれらのみに限定する趣旨のものではない。 Here, an embodiment of a formwork apparatus for forming a precast concrete staircase according to the present invention will be described based on the drawings. The dimensions, materials, shapes, relative arrangements, and the like of the constituent elements described in the present embodiment are not intended to limit the technical scope of the invention only to those unless otherwise specified.
　図１は、本実施形態に係るプレキャストコンクリート階段用の型枠装置１の全体斜視図である。図２は、本実施形態に係る型枠装置１の分解図である。図３は、本実施形態に係る型枠装置１の側面図である。型枠装置１は、例えばプレキャストコンクリート（ＰＣ）工場に設置されており、プレキャストコンクリート階段を成形するために用いられる。 FIG. 1 is an overall perspective view of a formwork device 1 for a precast concrete staircase according to the present embodiment. FIG. 2 is an exploded view of the formwork apparatus 1 according to the present embodiment. FIG. 3 is a side view of the mold apparatus 1 according to the present embodiment. The formwork apparatus 1 is installed, for example, in a precast concrete (PC) factory, and is used for forming a precast concrete staircase.
　型枠装置１は、コンクリートを流し込むことでプレキャストコンクリート階段を成形する型枠部材２、及びこの型枠部材２を支持するための架台３を有する。架台３は、適宜のフレーム部材が枠組みされることで構成されている。フレーム部材としては、例えばＨ型鋼などの鋼材を好適に使用することができるが、これに限定されるものではない。 The formwork apparatus 1 has a formwork member 2 for forming a precast concrete staircase by pouring concrete, and a gantry 3 for supporting the formwork member 2. The gantry 3 is configured by an appropriate frame member being framed. As the frame member, for example, a steel material such as H-shaped steel can be suitably used, but is not limited thereto.
　型枠部材２は、第１踊り場部用型枠ユニット２１、第２踊り場部用型枠ユニット２２、階段部用型枠ユニット２３、蓋部材２４を主として備える。第１踊り場部用型枠ユニット２１及び第２踊り場部用型枠ユニット２２は、プレキャストコンクリート階段の踊り場部を成形するための型枠ユニットである。階段部用型枠ユニット２３は、プレキャストコンクリート階段の段板を含む階段部を成形するための型枠ユニットである。 The mold member 2 mainly includes a first landing part form unit 21, a second landing part form unit 22, a staircase form unit 23, and a lid member 24. The first landing part form unit 21 and the second landing part form unit 22 are form unit for forming the landing part of the precast concrete staircase. The staircase part formwork unit 23 is a formwork unit for forming a staircase part including a precast concrete staircase.
　階段部用型枠ユニット２３の両端には、第１踊り場部用型枠ユニット２１及び第２踊り場部用型枠ユニット２２が夫々、着脱自在に連結されている。蓋部材２４は、例えば第１蓋部材２４Ａ及び第２蓋部材２４Ｂからなり、階段部用型枠ユニット２３に着脱することが可能である。図１及び図３においては、階段部用型枠ユニット２３が架台３に支持固定された状態において、蓋部材２４が階段部用型枠ユニット２３に装着された状態を示している。このように、階段部用型枠ユニット２３に蓋部材２４が装着されると、上方に向かって開放された階段部用型枠ユニット２３の上方開口部（面）が塞がれる。 The first landing part form unit 21 and the second landing part form unit 22 are detachably connected to both ends of the staircase form unit 23, respectively. The lid member 24 includes, for example, a first lid member 24A and a second lid member 24B, and is attachable to and detachable from the staircase formwork unit 23. 1 and 3 show a state in which the lid member 24 is mounted on the staircase formwork unit 23 in a state where the staircase formwork unit 23 is supported and fixed to the gantry 3. As described above, when the lid member 24 is attached to the staircase formwork unit 23, the upper opening (surface) of the staircase formwork unit 23 opened upward is closed.
　階段部用型枠ユニット２３は、一対の側方型枠２３１，２３１とこれらを連結する段成形用金属板２３２とを有する。段成形用金属板２３２は、プレキャストコンクリート階段の蹴上げ部及び踏面部を成形するための型枠面であり、Ｌ字形に加工された金属板が複数連続して連なっている。段成形用金属板２３２における幅方向の両端部は、例えば溶接などによって側方型枠２３１，２３１と接合されている。 The staircase part mold unit 23 has a pair of side molds 231, 231 and a step forming metal plate 232 connecting them. The step-forming metal plate 232 is a formwork surface for forming the kick-up portion and the tread portion of the precast concrete staircase, and a plurality of metal plates processed into an L shape are continuously connected. Both ends of the step forming metal plate 232 in the width direction are joined to the side molds 231 and 231 by welding or the like, for example.
　更に、階段部用型枠ユニット２３の側方型枠２３１，２３１は、型枠本体部２３３及び土台部２３４から構成されている。土台部２３４は、架台３（具体的には、後述する階段部支持用架台３３）に載置及び締結されることで支持される。型枠本体部２３３は、土台部２３４の上部構造として形成されており、この型枠本体部２３３と上述した段成形用金属板２３２とが接合されている。また、型枠本体部２３３の上縁部２３３Ａは、階段部用型枠ユニット２３の上方開口部の開口縁を形成している。上縁部２３３Ａには、第１蓋部材２４Ａ及び第２蓋部材２４Ｂを締結するためのボルト孔等が形成されており、各蓋部材２４Ａ，２４Ｂは、階段部用型枠ユニット２３の上縁部２３３Ａに取付けることができる。 Further, the side molds 231 and 231 of the staircase unit mold unit 23 are composed of a mold body part 233 and a base part 234. The base portion 234 is supported by being placed and fastened on the gantry 3 (specifically, a staircase portion support gantry 33 described later). The formwork body 233 is formed as an upper structure of the base part 234, and the formwork body 233 and the above-described step forming metal plate 232 are joined. Further, the upper edge portion 233A of the mold body portion 233 forms an opening edge of the upper opening portion of the staircase portion mold unit 23. Bolt holes and the like for fastening the first lid member 24A and the second lid member 24B are formed in the upper edge portion 233A, and the lid members 24A and 24B are formed on the upper edge of the staircase formwork unit 23, respectively. It can be attached to the part 233A.
　第１踊り場部用型枠ユニット２１は、底板２１１及び側方型枠２１２を有する。底板２１１は、架台３（具体的には、後述する第１踊り場部支持用架台３１）に載置及び締結されることで支持されている。側方型枠２１２は、３本の鋼材を枠組みして３方枠としたものであり、階段部用型枠ユニット２３における一対の側方型枠２３１，２３１に対して着脱自在に連結されている。ここで、図３の破線丸で囲まれた第１連結部は、階段部用型枠ユニット２３と第１踊り場部用型枠ユニット２１との連結部を拡大して表すものである。階段部用型枠ユニット２３と第１踊り場部用型枠ユニット２１とは、双方に形成されたフランジがボルト及びナット等を含む締結具４によって締結されている。これにより、階段部用型枠ユニット２３と第１踊り場部用型枠ユニット２１とを着脱自在に連結（接続）することができる。 The first landing part formwork unit 21 has a bottom plate 211 and a side formwork 212. The bottom plate 211 is supported by being placed and fastened on the gantry 3 (specifically, a first landing stage support gantry 31 described later). The side mold 212 is a three-frame formed by framing three steel materials, and is detachably connected to the pair of side molds 231, 231 in the staircase mold unit 23. Yes. Here, the 1st connection part enclosed with the broken-line circle | round | yen of FIG. 3 expands and represents the connection part of the mold unit 23 for staircase parts, and the mold unit 21 for 1st landing parts. The staircase part formwork unit 23 and the first landing part formwork unit 21 are fastened by a fastener 4 including flanges formed on both sides thereof, such as bolts and nuts. Thereby, the mold unit 23 for staircases and the mold unit 21 for 1st landing parts can be connected (connected) removably.
　第２踊り場部用型枠ユニット２２は、第１踊り場部用型枠ユニット２１と概ね同一構造となっている。第２踊り場部用型枠ユニット２２は、底板２２１及び側方型枠２２２を有する。底板２２１は、架台３（具体的には、後述する第２踊り場部支持用架台３２）に載置及び締結されることで支持されている。側方型枠２２２は、３本の鋼材を枠組みして３方枠としたものであり、階段部用型枠ユニット２３における一対の側方型枠２３１，２３１に対して着脱自在に連結されている。ここで、図３の破線丸で囲まれた第２連結部は、階段部用型枠ユニット２３と第２踊り場部用型枠ユニット２２との連結部を拡大して表すものである。階段部用型枠ユニット２３と第２踊り場部用型枠ユニット２２とは、双方に形成されたフランジがボルト及びナット等を含む締結具５によって締結されている。これにより、階段部用型枠ユニット２３と第２踊り場部用型枠ユニット２２とを着脱自在に連結（接続）することができる。 The second landing part formwork unit 22 has substantially the same structure as the first landing part formwork unit 21. The second landing part formwork unit 22 includes a bottom plate 221 and a side formwork 222. The bottom plate 221 is supported by being placed and fastened to the gantry 3 (specifically, a second landing stage support gantry 32 described later). The side mold 222 is a three-frame formed by framing three steel materials, and is detachably connected to the pair of side molds 231 and 231 in the staircase mold unit 23. Yes. Here, the 2nd connection part enclosed with the broken-line circle of FIG. 3 expands and shows the connection part of the mold unit 23 for staircase parts, and the mold unit 22 for 2nd landing parts. The staircase part formwork unit 23 and the second landing part formwork unit 22 are fastened by a fastener 5 including flanges formed on both sides thereof, such as bolts and nuts. Thereby, the mold unit 23 for staircase parts and the mold unit 22 for 2nd landing parts can be connected (connected) removably.
　第１踊り場部用型枠ユニット２１、第２踊り場部用型枠ユニット２２、及び階段部用型枠ユニット２３といった３つの型枠ユニットが着脱自在に連結されることによって、踊り場を含むプレキャストコンクリート階段の全形を画成する型枠部材２が構成される。なお、本実施形態における型枠部材２は、架台３に支持固定された状態において、階段の踏面が下方に向いた状態のいわゆる逆打ち仕様となっている。 A precast concrete staircase including a landing is provided by detachably connecting three formwork units such as a first landing part form unit 21, a second landing part form unit 22, and a staircase form unit 23. The formwork member 2 that defines the entire shape is configured. The formwork member 2 according to the present embodiment has a so-called counter-strike specification in which the tread surface of the stairs faces downward when the mold member 2 is supported and fixed to the gantry 3.
　次に、架台３について説明する。架台３は、第１踊り場部支持用架台３１、第２踊り場部支持用架台３２、階段部支持用架台３３、ベースフレーム３４を主として備えている。ベースフレーム３４は、架台３を構成するフレーム部材のうち最下層に位置する部材であり、複数の横架材を枠組みして構成されている。ベースフレーム３４は、地面、コンクリート面、床版等のように水平な設置箇所に載置或いは締結される。 Next, the gantry 3 will be described. The gantry 3 mainly includes a first landing part support gantry 31, a second landing part support gantry 32, a staircase part support gantry 33, and a base frame 34. The base frame 34 is a member located in the lowermost layer among the frame members constituting the gantry 3, and is configured by framing a plurality of horizontal members. The base frame 34 is placed or fastened at a horizontal installation location such as the ground, a concrete surface, a floor slab or the like.
　第１踊り場部支持用架台３１、第２踊り場部支持用架台３２、及び階段部支持用架台３３は夫々、ベースフレーム３４から立設しており、ベースフレーム３４における長辺方向の一端側から、第１踊り場部支持用架台３２、階段部支持用架台３３、第２踊り場部支持用架台３２の順に並んで設けられている。第１踊り場部支持用架台３１、第２踊り場部支持用架台３２、及び階段部支持用架台３３は夫々、上述した第１踊り場部用型枠ユニット２１、第２踊り場部用型枠ユニット２２、階段部用型枠ユニット２３を支持するための架台である。 The first landing part support base 31, the second landing part support base 32, and the stair part support base 33 are each erected from the base frame 34, and from one end side of the base frame 34 in the long side direction, The first landing part support base 32, the staircase part support base 33, and the second landing part support base 32 are arranged in this order. The first landing part support base 31, the second landing part support base 32, and the staircase support base 33 are respectively the first landing part form unit 21 and the second landing part form unit 22 described above. This is a frame for supporting the staircase unit formwork unit 23.
　第１踊り場部支持用架台３１は、ベースフレーム３４に対して垂直に立設する複数の支柱の上端同士を繋ぐように水平に掛け渡された水平支持フレーム３１１を有する。水平支持フレーム３１１は枠組みされており、その上部に第１踊り場部用型枠ユニット２１の底板２１１が載置及び締結されるようになっている。 The first landing stage support pedestal 31 has a horizontal support frame 311 that is stretched horizontally so as to connect the upper ends of a plurality of support columns standing upright with respect to the base frame 34. The horizontal support frame 311 is framed, and the bottom plate 211 of the first landing part form unit 21 is placed and fastened thereon.
　階段部支持用架台３３は、ベースフレーム３４から斜めに延びる斜め支持フレーム３３１を有する。斜め支持フレーム３３１は、例えばベースフレーム３４から垂直に立設する支柱によって支えられている。斜め支持フレーム３３１には、階段部用型枠ユニット２３における側方型枠２３１（土台部２３４）が載置及び締結されるようになっている。 The staircase support frame 33 has an oblique support frame 331 extending obliquely from the base frame 34. The oblique support frame 331 is supported by, for example, a support column that stands vertically from the base frame 34. A side mold 231 (base 234) in the staircase formwork unit 23 is placed and fastened to the oblique support frame 331.
　次に、第２踊り場部支持用架台３２について説明する。第２踊り場部支持用架台３２は、固定支持部３２１及び階高調節用支持部３２２から構成されている。固定支持部３２１は、ベースフレーム３４から垂直に立設する複数の支柱３２１Ａと、この支柱３２１Ａ及び斜め支持フレーム３３１に接合される横架材３２１Ｂとを有する。階高調節用支持部３２２は、固定支持部３２１の上部構造として固定支持部３２１の上部に設置されており、複数の高さ調節用ピース３２２Ａと、水平支持部３２２Ｂとを有している。 Next, the second landing stage support frame 32 will be described. The second landing part support base 32 includes a fixed support part 321 and a floor height adjustment support part 322. The fixed support portion 321 includes a plurality of support columns 321A standing vertically from the base frame 34, and a horizontal member 321B joined to the support columns 321A and the oblique support frame 331. The floor height adjustment support portion 322 is installed on the upper portion of the fixed support portion 321 as an upper structure of the fixed support portion 321 and includes a plurality of height adjustment pieces 322A and a horizontal support portion 322B.
　図３に示す破線丸で囲まれた第３連結部は、固定支持部３２１と階高調節用支持部３２２との連結部を拡大して表すものである。高さ調節用ピース３２２Ａは、固定支持部３２１側の横架材３２１Ｂと水平支持部３２２Ｂとにボルト及びナット等を含む締結具６によって締結されるようになっている。水平支持部３２２Ｂのうち、高さ調節用ピース３２２Ａが締結される位置には、接合片３２２Ｃが下方に向けて突設されている。高さ調節用ピース３２２Ａは、締結具７を介して、横架材３２１Ｂに締結されている。固定支持部３２１と階高調節用支持部３２２とにおける連結は、高さ調節用ピース３２２Ａ側に形成されたボルト孔と接合片３２２Ｃ側に形成されたボルト孔を位置合わせして締結具６を締結することで実現される。 The third connecting portion surrounded by a broken-line circle shown in FIG. 3 is an enlarged view of the connecting portion between the fixed support portion 321 and the floor height adjusting support portion 322. The height adjusting piece 322A is fastened to the horizontal member 321B and the horizontal support portion 322B on the fixed support portion 321 side by a fastener 6 including bolts, nuts, and the like. A joining piece 322C projects downward from a position of the horizontal support portion 322B where the height adjusting piece 322A is fastened. The height adjusting piece 322 </ b> A is fastened to the horizontal member 321 </ b> B via the fastener 7. In the connection between the fixed support portion 321 and the floor height adjusting support portion 322, the bolt hole formed on the height adjusting piece 322A side and the bolt hole formed on the joining piece 322C side are aligned, and the fastener 6 is aligned. Realized by fastening.
　水平支持部３２２Ｂには、第２踊り場部用型枠ユニット２２の底板２２１が載置及び締結されるようになっている。本実施形態に係る型枠装置１では、長さの異なる複数種の高さ調節用ピース３２２Ａが用意されている。本実施形態では、高さ調節用ピース３２２Ａの長さを変更し、或いは、高さ調節用ピース３２２Ａを取り外して固定支持部３２１における横架材３２１Ｂに直接水平支持部３２２Ｂを取り付けることによって、第２踊り場部支持用架台３２が第２踊り場部用型枠ユニット２２を支持する支持高さを調節することが可能である。詳しくは後述するが、型枠装置１によって成形（製造）するプレキャストコンクリート階段の階高に応じて、使用する高さ調節用ピース３２２Ａを選択し、高さ調節用ピース３２２Ａを交換したり、高さ調節用ピース３２２Ａを外すことにより、プレキャストコンクリート階段の階高の変更にフレキシブルに対応することができる。 The bottom plate 221 of the second landing part part form unit 22 is placed and fastened to the horizontal support part 322B. In the formwork apparatus 1 according to the present embodiment, a plurality of types of height adjusting pieces 322A having different lengths are prepared. In the present embodiment, by changing the length of the height adjustment piece 322A, or by removing the height adjustment piece 322A and attaching the horizontal support portion 322B directly to the horizontal member 321B in the fixed support portion 321, It is possible to adjust the support height at which the second landing part support base 32 supports the second landing part form unit 22. As will be described in detail later, the height adjustment piece 322A to be used is selected according to the floor height of the precast concrete stairs to be molded (manufactured) by the formwork apparatus 1, and the height adjustment piece 322A is replaced, By removing the height adjusting piece 322A, it is possible to flexibly cope with a change in the height of the precast concrete staircase.
　以上のように構成される型枠装置１においては、型枠部材２の内部空間に構造用鉄筋を配筋した後、コンクリートを打込むことで、踊り場を含むプレキャストコンクリート階段を成形する。図４は、型枠部材２へのコンクリートの打込み手順を例示する図である。図４において、型枠部材２の内部に配された鉄筋の図示を省略している。コンクリートの打込み手順は、第２踊り場部用型枠ユニット２２（ＣＯＮ１）→階段部用型枠ユニット２３の下層部（ＣＯＮ２）→階段部用型枠ユニット２３の上層部（ＣＯＮ３）→第１踊り場部用型枠ユニット２１（ＣＯＮ４）の順に行われる。 In the formwork apparatus 1 configured as described above, a structural rebar is placed in the interior space of the formwork member 2 and then concrete is driven to form a precast concrete stair including a landing. FIG. 4 is a diagram illustrating a procedure for placing concrete into the mold member 2. In FIG. 4, illustration of reinforcing bars arranged inside the mold member 2 is omitted. The concrete placement procedure is as follows: second landing stage formwork unit 22 (CON1) → lower layer part (CON2) of staircase part formwork unit 23 → upper part part (CON3) of staircase part formwork unit 23 → first landing place This is performed in the order of the part mold unit 21 (CON4).
　ここで、コンクリートの打込み開始時には第１蓋部材２４Ａ及び第２蓋部材２４Ｂは共に階段部用型枠ユニット２３から外された状態となっている。第２踊り場部用型枠ユニット２２（ＣＯＮ１）へのコンクリートの打込みの所要時間は、例えば５分程度である。次に、第２踊り場部用型枠ユニット２２内へのコンクリート打込み（ＣＯＮ１）が完了すると、第１蓋部材２４Ａを階段部用型枠ユニット２３に取付けた後、階段部用型枠ユニット２３の下層部（ＣＯＮ２）にコンクリートを打込む。ＣＯＮ１の打込みが完了してからＣＯＮ２の打込みを開始するまでのインターバルは例えば８分程度である。また、階段部用型枠ユニット２３の下層部（ＣＯＮ２）へのコンクリートの打込みの所要時間は、例えば１２分程度である。 Here, both the first lid member 24 </ b> A and the second lid member 24 </ b> B are removed from the staircase formwork unit 23 at the start of concrete pouring. The time required for placing concrete into the second landing part form unit 22 (CON1) is, for example, about 5 minutes. Next, when the concrete placement (CON1) into the second landing part form unit 22 is completed, the first lid member 24A is attached to the stair part form unit 23, and then the stair part form unit 23 Concrete is driven into the lower layer (CON2). The interval from the completion of CON1 implantation to the start of CON2 implantation is, for example, about 8 minutes. Further, the time required for placing concrete into the lower layer part (CON2) of the staircase part formwork unit 23 is, for example, about 12 minutes.
　次に、第２蓋部材２４Ｂを階段部用型枠ユニット２３に取付けた後、階段部用型枠ユニット２３の上層部（ＣＯＮ３）にコンクリートを打込む。ＣＯＮ２の打込みが完了してからＣＯＮ３の打込みを開始するまでのインターバルは、例えば５分程度である。また、階段部用型枠ユニット２３の上層部（ＣＯＮ３）へのコンクリートの打込みの所要時間は、例えば５分程度である。階段部用型枠ユニット２３の上層部（ＣＯＮ３）へのコンクリートの打込みが完了すると、第１踊り場部用型枠ユニット２１（ＣＯＮ４）へとコンクリートを打込む。これによって、プレキャストコンクリート階段のコンクリートの打込みが完了する。 Next, after attaching the second lid member 24B to the staircase formwork unit 23, concrete is driven into the upper layer part (CON3) of the staircase formwork unit 23. The interval from the completion of CON2 implantation to the start of CON3 implantation is, for example, about 5 minutes. Moreover, the time required for placing concrete into the upper layer part (CON3) of the staircase formwork unit 23 is, for example, about 5 minutes. When the concrete driving into the upper layer part (CON3) of the staircase part formwork unit 23 is completed, the concrete is driven into the first landing part formwork unit 21 (CON4). This completes the placement of the concrete in the precast concrete staircase.
　なお、上述したＣＯＮ１～ＣＯＮ４へのコンクリートの打込みは、バイブレータによってコンクリートを締め固めながら行われる。また、図４において説明したコンクリートの打込み手順は一例を示したものであり、上記とは異なる打込み手順を採用してもよいのは勿論である。また、各部位へのコンクリートの打込みに要する時間や、インターバルについても適宜変更することができるのは言うまでもない。 Note that the concrete is placed into the above-described CON1 to CON4 while the concrete is compacted by a vibrator. Further, the concrete placing procedure described in FIG. 4 shows an example, and it is needless to say that a placing procedure different from the above may be adopted. Needless to say, the time and interval required for placing concrete into each part can be changed as appropriate.
　本実施形態に係るプレキャストコンクリート階段用の型枠装置１においては、型枠部材２に関して、階段部用型枠ユニット２３が第１踊り場部用型枠ユニット２１及び第２踊り場部用型枠ユニット２２の夫々に対して着脱自在に連結されている点が特徴として挙げられる。また、階段部用型枠ユニット２３、第１踊り場部用型枠ユニット２１、及び第２踊り場部用型枠ユニット２２は、架台３に対しても着脱自在に設けられている。このようにすることで、各型枠ユニットを必要に応じて部分的かつ選択的にユニット単位で入れ替えることが可能となる。 In the precast concrete staircase formwork apparatus 1 according to this embodiment, the staircase part formwork unit 23 for the formwork member 2 is a first landing part formwork unit 21 and a second landing part formwork unit 22. The feature is that it is detachably connected to each of the above. In addition, the staircase part formwork unit 23, the first landing part formwork unit 21, and the second landing part formwork unit 22 are also detachably provided to the gantry 3. By doing in this way, it becomes possible to replace each formwork unit by a unit unit partially and selectively as needed.
　プレキャストコンクリート階段において、階段部用型枠ユニット２３により成形される階段部、第１踊り場部用型枠ユニット２１及び第２踊り場部用型枠ユニット２２によって成形される踊り場部とを比較すると、踊り場部の形状は画一的であり、その寸法についても標準寸法が用いられる場合が少なくない。一方、階段部においては、施工物件が異なったり或いは同じ施工物件内においても階高が変更されることで、蹴上げ寸法や踏面寸法が変更されることが多く、その場合には階段部用型枠ユニット２３の仕様を変更する必要がある。 In the precast concrete staircase, when comparing the staircase part formed by the staircase part formwork unit 23, the landing part part formed by the first landing part formwork unit 21 and the second landing part formwork unit 22, the landing part The shape of the part is uniform, and the standard dimension is often used for the dimension. On the other hand, in the staircase, the construction height is different because the construction properties are different or the floor height is changed even within the same construction property, and in that case, the staircase formwork is changed. It is necessary to change the specifications of the unit 23.
　これに対して本実施形態に係る型枠装置１によれば、例えば、階段部用型枠ユニット２３のみを、蹴上げ寸法や踏面寸法が異なるものに交換することが可能である。従って、従来の型枠装置においては、階段部の蹴上げ寸法、踏面寸法、段数等が変更された場合には、型枠部材の全体を作り替えることを余儀なくされていたのに対して、本実施形態に係る型枠装置１によれば、各型枠ユニット２１～２３の中から必要に応じて一又は複数のユニットを任意に入れ替えることができる。特に、型枠装置１において成形する階段の蹴上げ寸法や踏面寸法や段数等が変更された場合には、階段部用型枠ユニット２３のみを入れ替えることができるので利便性が高い。従って、従来のようにプレキャストコンクリート階段の設計仕様が変更される度に型枠部材全体を製作し直す場合に比べて、型枠部材の製作コストを低減することができ、また、型枠装置１を組み直すために要する労力や時間を軽減することが可能である。 On the other hand, according to the formwork apparatus 1 according to the present embodiment, for example, it is possible to replace only the staircase part formwork unit 23 with one having different kick-up dimensions and tread surface dimensions. Therefore, in the conventional formwork apparatus, when the kicking dimension of the staircase portion, the tread surface dimension, the number of steps, and the like are changed, the entire formwork member is forced to be remodeled. According to the formwork apparatus 1 according to the above, one or a plurality of units can be arbitrarily replaced from among the formwork units 21 to 23 as necessary. In particular, when the height of the staircase to be molded, the size of the tread surface, the number of steps, or the like is changed in the mold apparatus 1, only the staircase formwork unit 23 can be replaced, which is highly convenient. Therefore, it is possible to reduce the production cost of the formwork member as compared with the case where the entire formwork member is remanufactured each time the design specifications of the precast concrete staircase are changed as in the prior art. It is possible to reduce the labor and time required for reassembling.
　なお、階段部用型枠ユニット２３の入れ替えによって、型枠装置１から取り外された階段部用型枠ユニット２３は例えばストックヤード等にストックしておくとよい。このようにストックされている階段部用型枠ユニット２３は、将来、階段の設計仕様が同じ物件を施工する際に、再利用することが可能である。すなわち、本実施形態に係る型枠装置１によれば、階段部用型枠ユニット２３を転用することが可能であり経済的にも優れる。なお、ストックヤードに階段部用型枠ユニット２３をストックする際には、段成形用金属板２３２におけるコンクリート打込み面が下側になるようにストックしておくとよい。これにより、段成形用金属板２３２のうち、コンクリートを打込む方の面が雨等によって錆びることを抑制できる。 The staircase part formwork unit 23 removed from the formwork device 1 by replacing the staircase part formwork unit 23 may be stocked, for example, in a stockyard. The staircase formwork unit 23 thus stocked can be reused in the future when constructing a property having the same staircase design specifications. That is, according to the formwork apparatus 1 which concerns on this embodiment, it is possible to divert the step part formwork unit 23 and it is economically excellent. When the staircase formwork unit 23 is stocked in the stock yard, it is preferable to stock the staircase forming metal plate 232 so that the concrete placing surface is on the lower side. Thereby, it can suppress that the surface into which concrete is poured among the metal plates 232 for a step forming rusts with rain etc.
　更に、型枠装置１においては、階段部用型枠ユニット２３のみならず、第１踊り場部用型枠ユニット２１及び第２踊り場部用型枠ユニット２２も架台３に対して着脱自在に設けられているため、階段の踊り場の寸法が変更された場合には第１踊り場部用型枠ユニット２１及び／又は第２踊り場部用型枠ユニット２２を容易に交換することも可能である。 Furthermore, in the formwork apparatus 1, not only the staircase part formwork unit 23 but also the first landing part formwork unit 21 and the second landing part formwork unit 22 are detachably provided to the gantry 3. Therefore, when the dimensions of the landing stage of the stairs are changed, the first landing part form unit 21 and / or the second landing part form unit 22 can be easily replaced.
　次に、型枠装置１によって成形するプレキャストコンクリート階段の階高が変更された場合について、図５を参照して説明する。実施形態に係る型枠装置１の変形例を示す側面図である。ここでは、図３に示す仕様に比べて、階高の高い階段を成形する場合を例に挙げて説明する。 Next, the case where the floor height of the precast concrete staircase formed by the mold apparatus 1 is changed will be described with reference to FIG. It is a side view which shows the modification of the formwork apparatus 1 which concerns on embodiment. Here, a case where a staircase having a higher floor height is formed as compared with the specification shown in FIG. 3 will be described as an example.
　本実施形態においては、型枠装置１を用いて成形する階段の階高が変更された場合、固定支持部３２１と階高調節用支持部３２２との間に介在させる高さ調節用ピース３２２Ａの種類を変更したり、高さ調節用ピース３２２Ａ自体を取り外すことで固定支持部３２１の上に水平支持部３２２Ｂを直接固定する。図５に示す例では、横架材３２１Ｂと水平支持部３２２Ｂとの間に介装されている高さ調節用ピース３２２Ａを取り外し、固定支持部３２１の上に水平支持部３２２Ｂを直接載置し、締結している。これにより、第１踊り場部用型枠ユニット２１における底板２１１の表面と、第２踊り場部用型枠ユニット２２における底板２２１の表面との鉛直方向における離隔寸法（以下、「底板高さ離隔寸法」という）が、図３に示す構成例に比べて大きくなる。なお、底板高さ離隔寸法は、成形後における階段の階高に一致する。以上のように、本構成によれば、プレキャストコンクリート階段の階高に応じて底板高さ離隔寸法を自在に変更することができ、双方の寸法を合致させることができる。なお、高さ調節用ピース３２２Ａ及び／又は接合片３２２Ｃの高さ方向（材軸方向）にボルト孔を複数設けておき、締結具６を挿通させるボルト孔を選択することで、底板高さ離隔寸法を変更してもよい。また、高さ調節用ピース３２２Ａの代替手段として、水平支持部３２２Ｂと横架材３２１Ｂとの間に例えばジャッキアップ装置を介在させておき、ジャッキアップ装置を作動させることで水平支持部３２２Ｂと横架材３２１Ｂとの間の距離を変化させることにより、底板高さ離隔寸法を変更してもよい。 In the present embodiment, when the floor height of the stairs to be molded using the mold apparatus 1 is changed, the height adjusting piece 322A interposed between the fixed support portion 321 and the floor height adjusting support portion 322 is used. The horizontal support 322B is directly fixed on the fixed support 321 by changing the type or removing the height adjusting piece 322A itself. In the example shown in FIG. 5, the height adjusting piece 322 </ b> A interposed between the horizontal member 321 </ b> B and the horizontal support 322 </ b> B is removed, and the horizontal support 322 </ b> B is directly placed on the fixed support 321. , Have concluded. Thereby, the separation dimension in the vertical direction between the surface of the bottom plate 211 in the first landing part formwork unit 21 and the surface of the bottom plate 221 in the second landing part formwork unit 22 (hereinafter referred to as “bottom plate height separation dimension”). Is larger than the configuration example shown in FIG. The bottom plate height separation dimension matches the floor height of the stairs after molding. As described above, according to this configuration, the bottom plate height separation dimension can be freely changed according to the floor height of the precast concrete staircase, and both dimensions can be matched. A plurality of bolt holes are provided in the height direction (material axis direction) of the height adjustment piece 322A and / or the joining piece 322C, and the bolt hole through which the fastener 6 is inserted is selected, thereby separating the bottom plate height. The dimensions may be changed. Further, as an alternative to the height adjustment piece 322A, for example, a jack-up device is interposed between the horizontal support portion 322B and the horizontal member 321B, and the jack-up device is actuated to operate the horizontal support portion 322B. You may change a baseplate height separation dimension by changing the distance between the base materials 321B.
　階段部用型枠ユニット２３については、階段部の設計仕様が一致するものがストックヤードにストックされていればそれを再利用し、そうでなければ、階段部用型枠ユニット２３のみを製作する。そして、架台３に支持されていた階段部用型枠ユニット２３を、階高変更後の仕様に合致する階段部用型枠ユニット２３Ａ に入れ替える。その後、上述したように、型枠部材２の内部空間に構造用鉄筋を配筋し、型枠部材２内へのコンクリートの打込みを行う。これにより、階高、蹴上げ寸法、踏面寸法等の仕様の異なるプレキャストコンクリート階段を成形することができる。本実施形態においては、階段部用型枠ユニット２３を入れ替えるだけで成形する階段の仕様変更に対応することができるため、型枠部材２の製作コストの低減、型枠装置１を組み直すために要する労力の軽減、工期の短縮等を利益を得ることが可能である。 For the staircase part formwork unit 23, if the one that matches the design specifications of the staircase part is stocked in the stock yard, it is reused. Otherwise, only the staircase part formwork unit 23 is manufactured. . Then, the staircase formwork unit 23 supported by the gantry 3 is replaced with a staircase formwork unit 23A that matches the specifications after the change in floor height. Thereafter, as described above, the structural reinforcing bars are arranged in the internal space of the mold member 2 and the concrete is driven into the mold member 2. Thereby, the precast concrete staircase from which specifications, such as a floor height, a kick-up dimension, a tread surface dimension, differ, can be fabricated. In the present embodiment, it is possible to cope with a change in the specifications of the staircase to be formed simply by replacing the staircase portion formwork unit 23, which is required for reducing the manufacturing cost of the formwork member 2 and reassembling the formwork apparatus 1. It is possible to make a profit by reducing labor and shortening the construction period.
　以上、本発明の好適な実施形態を説明したが、上述した実施形態は本発明の本旨を逸脱しない範囲内において種々の変更を加えることができる。例えば、階段部用型枠ユニットにおける一対の側方型枠２３１，２３１の離隔寸法は、調節可能に構成されていてもよい。これにより、成形する階段の幅が変更された場合において、所望の幅を有する階段を成形することができる。また、本実施形態に係る階段装置１では、階段部用型枠ユニット２３の両端に踊り場部用型枠ユニットが着脱自在に連結されているが、何れか一方の端部のみに踊り場部用型枠ユニットが着脱自在に連結されていてもよい。 The preferred embodiments of the present invention have been described above. However, the above-described embodiments can be variously modified without departing from the spirit of the present invention. For example, the distance between the pair of side molds 231 and 231 in the staircase unit mold unit may be adjustable. Thereby, when the width | variety of the staircase to shape | mold is changed, the staircase which has a desired width | variety can be shape | molded. Further, in the staircase device 1 according to the present embodiment, the landing unit formwork unit is detachably connected to both ends of the staircase unit mold unit 23, but the landing unit mold is provided only at one of the ends. The frame unit may be detachably connected.
１・・・型枠装置
２・・・型枠部材
３・・・架台
２１・・・第１踊り場部用型枠ユニット
２２・・・第２踊り場部用型枠ユニット
２３・・・階段部用型枠ユニット
２４・・・蓋部材
２４Ａ・・・第１蓋部材
２４Ｂ・・・第２蓋部材
３１・・・第１踊り場部支持用架台
３２・・・第２踊り場部支持用架台
３３・・・階段部支持用架台
３４・・・ベースフレーム
３２２・・・階高調節用支持部
３２２Ａ・・・高さ調節用ピース DESCRIPTION OF SYMBOLS 1 ... Formwork apparatus 2 ... Formwork member 3 ... Base 21 ... Formwork unit 22 for 1st landing part ... Formwork unit 23 for 2nd landing part ... For staircase parts Formwork unit 24 ... lid member 24A ... first lid member 24B ... second lid member 31 ... first landing part support base 32 ... second landing part support base 33 ... Step support frame 34 ... Base frame 322 ... Floor height adjustment support 322A ... Height adjustment piece

Claims (3)

  1. 　架台と、
    　前記架台に支持されると共にプレキャストコンクリート階段を成形するための型枠部材と、を備えるプレキャストコンクリート階段用の型枠装置であって、
    　前記型枠部材は、
    　前記架台に着脱自在に設けられると共に前記プレキャストコンクリート階段の階段部を成形するための階段部用型枠ユニットと、
    　前記階段部用型枠ユニットの少なくとも一端に着脱自在に設けられ、前記プレキャストコンクリート階段の踊り場部を成形するための踊り場部用型枠ユニットと、
    　を有する、プレキャストコンクリート階段用の型枠装置。     A frame,
    A formwork device for a precast concrete staircase, comprising a formwork member for forming a precast concrete staircase while being supported by the gantry,
    The mold member is
    A stairs part formwork unit that is detachably provided on the gantry and for forming a stairs part of the precast concrete stairs,
    A landing unit formwork unit that is detachably provided on at least one end of the staircase unit mold unit, and for forming the landing part of the precast concrete staircase,
    A formwork apparatus for precast concrete stairs.
  2. 　前記架台は、前記踊り場部用型枠ユニットを水平に支持する水平支持部を有し、
    　前記水平支持部は、前記踊り場部用型枠ユニットの支持高さが調節自在に構成されている、
    　請求項１に記載のプレキャストコンクリート階段用の型枠装置。     The gantry has a horizontal support portion that horizontally supports the landing form part form unit,
    The horizontal support part is configured such that the support height of the landing form part unit is adjustable.
    The formwork apparatus for precast concrete stairs according to claim 1.
  3. 　架台と、前記架台に支持される型枠部材とを備えるプレキャストコンクリート階段用の型枠装置を用いたプレキャストコンクリート階段の成形方法であって、
    　前記型枠部材は、前記架台に着脱自在に設けられると共に前記プレキャストコンクリート階段の階段部を成形するための階段部用型枠ユニットと、前記階段部用型枠ユニットの少なくとも一端に着脱自在に設けられ、前記プレキャストコンクリート階段の踊り場部を成形するための踊り場部用型枠ユニットと、を有し、
    　前記プレキャストコンクリート階段を成形する際、前記階段部用型枠ユニットを前記階段部の仕様に適合するものに入れ替える、
    　プレキャストコンクリート階段の成形方法。     A method for forming a precast concrete staircase using a formwork device for a precast concrete stair including a base and a formwork member supported by the base,
    The formwork member is detachably provided on the gantry and is detachably provided on at least one end of the staircase formwork unit for forming the staircase part of the precast concrete staircase. A landing unit mold unit for molding the landing part of the precast concrete staircase,
    When forming the precast concrete staircase, replace the staircase formwork unit with one that conforms to the specifications of the staircase portion,
    Forming method for precast concrete stairs.
PCT/JP2012/061417 2012-04-27 2012-04-27 Formwork apparatus for precast concrete stairway, and casting method for precast concrete stairway WO2013161065A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104859034A (en) * 2015-05-19 2015-08-26 德州海天机电科技有限公司 Multifunctional stair mould used for forming of prefabricated parts
CN106150001A (en) * 2015-04-28 2016-11-23 重庆建工住宅建设有限公司 A kind of fabricated assembly overall stair construction method
CN106771100A (en) * 2016-12-30 2017-05-31 山东省建筑科学研究院 Precast concrete stair structure and property detection loads support
US10006269B2 (en) 2013-07-11 2018-06-26 Superior Energy Services, Llc EAP actuated valve
CN110757629A (en) * 2019-11-22 2020-02-07 江苏开放大学（江苏城市职业学院） Quality-controllable assembled stair mold and stair manufacturing method

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JPS571706A (en) * 1980-06-05 1982-01-06 Onoda Cement Co Ltd Formwork for p.c concrete stair
JPH0664813U (en) * 1991-07-03 1994-09-13 清水建設株式会社 Formwork equipment for PC stairs
JPH08258030A (en) * 1995-03-27 1996-10-08 O M C:Kk Mold frame for precast concrete step
JPH09123142A (en) * 1995-10-26 1997-05-13 Ando Corp Precast concrete stair molding machine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS571706A (en) * 1980-06-05 1982-01-06 Onoda Cement Co Ltd Formwork for p.c concrete stair
JPH0664813U (en) * 1991-07-03 1994-09-13 清水建設株式会社 Formwork equipment for PC stairs
JPH08258030A (en) * 1995-03-27 1996-10-08 O M C:Kk Mold frame for precast concrete step
JPH09123142A (en) * 1995-10-26 1997-05-13 Ando Corp Precast concrete stair molding machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10006269B2 (en) 2013-07-11 2018-06-26 Superior Energy Services, Llc EAP actuated valve
CN106150001A (en) * 2015-04-28 2016-11-23 重庆建工住宅建设有限公司 A kind of fabricated assembly overall stair construction method
CN104859034A (en) * 2015-05-19 2015-08-26 德州海天机电科技有限公司 Multifunctional stair mould used for forming of prefabricated parts
CN106771100A (en) * 2016-12-30 2017-05-31 山东省建筑科学研究院 Precast concrete stair structure and property detection loads support
CN110757629A (en) * 2019-11-22 2020-02-07 江苏开放大学（江苏城市职业学院） Quality-controllable assembled stair mold and stair manufacturing method
CN110757629B (en) * 2019-11-22 2020-11-10 江苏开放大学（江苏城市职业学院） Quality-controllable assembled stair mold and stair manufacturing method

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