JP2018096092A - Form floating support - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a form floating support for supporting a lower end of a concrete formwork for construction of a rising wall, utilizing a vertical reinforcement arranged inside a concrete placing space for constructing the rising wall.SOLUTION: A form floating support 1, composed of an attachment portion 3 for a reinforcing bar F and a form support arm 4, is provided with an engagement member 2 engaged to an upper side of the form support arm 4. The engagement member 2 has a flat form support upper surface 2a, and a concave groove portion 7 which is slidably engaged in the length direction of the form support arm 4 is provided at a lower part of the engagement member 2. The engagement member 2 has a front shape when viewed from the tip side of the form support arm 4, such that the width of a lower end is not wider than the width of an upper end, and has a side shape of a portion lower than the upper side of the form support arm 4, such that the width in the length direction of the form support arm 4 decreases at the lower end side, and a vertical hole 8 to which the tip of a bar tool T can be inserted is provided on an upper part above the concave groove portion 7 of the engagement member 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a formwork floating support for floating and supporting a concrete formwork for a rising wall, which is used when building a rising wall that rises vertically from a floor slab, above the floor slab construction space. .

  When constructing a floor slab and a rising wall that rises vertically from this floor slab, the concrete form for the rising wall placed on the corner between the floor slab is floated above the floor slab construction space. Must support. In such a case, as described in Patent Document 1, it is attached in a cantilever manner to the vertical bars in the vertical direction arranged from the floor slab construction space to the rise wall construction space, and the concrete mold for the rise wall A formwork support that supports the lower end of the frame is used. The formwork floating support described in Patent Document 1 is provided with an attachment part to a reinforcing bar and a formwork support arm horizontally provided from the attachment part, but the concrete formwork is disassembled. In order to prevent the mold support arm from being exposed on the surface of the finished floor slab after removal, the mold support arm has a synthetic resin cone whose upper end is larger in diameter than the lower end, and a lower end of the cone. A mold shaft support portion that is provided on the side of the mold support arm, and is provided on the mold support arm side, and is formed of a vertical screw hole that screw-connects the lower end portion of the screw shaft, After dismantling and removing the formwork, the cone embedded in the floor slab was removed flush with the floor slab finish surface, and the corn removal trace was filled with mortar and finished. .

JP 2012-007326 A

  In the configuration of the conventional formwork floating support described in Patent Document 1, a relatively long length projecting downward from the lower end of the cone between the formwork support arm and the cone supporting the formwork. There is a problem that a long screw shaft is present and the supported cone lacks stability against horizontal and horizontal external force, and that the overall structure is complicated, the number of parts is large, and the cost is high.

  The present invention proposes a form-floating support that can solve the conventional problems as described above, and the form-floating support according to the present invention has a relationship with the embodiments described later. For ease of understanding, when the reference numerals used in the description of the embodiment are shown in parentheses, the attachment portion (3) to a vertical member such as a reinforcing bar (F) and the attachment portion (3) A formwork floating support (1) comprising a formwork support arm (4) made of a strip-shaped plate material that is continuously connected horizontally and whose plate surface is vertically oriented, and is located above the formwork support arm (4). A fitting member (2) that is fitted to the side is provided, and this fitting member (2) has a flat upper surface (2a) for supporting the formwork. A concave groove (7) that is slidably fitted in the length direction of (4) is provided, and the fitting member (2) is viewed from the front end side of the mold support arm (4). The surface shape is a shape in which the width of the lower end is not wider than the width of the upper end, and the side surface shape of the lower side portion of the upper side of the mold support arm (4) of the fitting member (2) The width of the support arm (4) in the length direction is shorter toward the lower end side, and the upper part of the fitting member (2) above the concave groove (7) is used for supporting the flat formwork. A vertical hole (8) that opens into the upper surface (2a) and into which the tip of the rod-shaped tool (T) can be inserted is provided.

  According to the above configuration of the present invention, the formwork support arm is attached to a vertical member such as a reinforcing bar disposed in the rising wall via the attachment portion and attached to the vertical member, and extends horizontally from the vertical member. The fitting member is fitted to the upper side by utilizing the concave groove portion, and the fitting member is slid in the length direction of the mold support arm to position the fitting member at the mold support position. In this state, the lower end of the rising wall concrete mold can be placed on and supported by the surface of the fitting member. If the concrete formwork for the rising wall is disassembled and removed after the concrete is placed and cured in this state, the fitting member is buried in the finished floor slab flush with the surface thereof. For example, a Shino that performs an operation of twisting a wire, or a tip of a Shino portion formed at the free end of the handle of the ratchet wrench is inserted into a vertical hole opened on the surface of the fitting member, and the fitting member On the other hand, a force is applied so that one end portion in the length direction (the end portion on the side adjacent to the built up rising wall) is lifted upward. Since the fitting member is in the shape as described above, it is lifted from the floor slab by the operating force given from Shino etc., and then operated to be pulled out from the floor slab with a fingertip or the like, It can be removed. After this, the floor slab and the rising wall are completed by filling the mortar after finishing the fitting member and finishing the surface.

  As described above, according to the mold floating support of the present invention, the mold floating support that is not equipped with the fitting member is very simple, for example, by adding the fitting member that can be easily molded with plastic, for example. Although it is a formwork floating support that can be implemented at low cost and is very easy to handle, it can not only avoid inconvenience due to the end face of the upper side of the formwork support arm being exposed to the surface of the floor slab. Compared to a conventional structure having a shaft rod that supports a cone in the middle as in the prior art, the supported formwork is highly stable against horizontal and horizontal external forces, and a safe and highly accurate formwork can be configured. .

When carrying out the present invention, specifically,
1. The planar shape of the fitting member is a horizontally long shape that is long in the length direction of the formwork support arm.
2. The side surface shape of the lower side portion of the fitting member from the upper side of the mold support arm is an arc shape.
3. The entire side shape of the fitting member is a semicircular arc.
4). The entire front shape of the fitting member is constricted and the lower end has a protruding arc shape.
5. The entire planar shape of the fitting member is an oval.
By adding one or more of the above conditions, it is possible to further easily remove the fitting member from the finished floor slab.

FIG. 1A is a plan view showing a formwork floating support according to an embodiment of the present invention, and FIG. 1B is a vertical sectional side view of the same part. 2A is a plan view of the fitting member, FIG. 2B is a sectional view taken along line XX of FIG. 2A, and FIG. 2C is a sectional view taken along line YY of FIG. 2A. FIG. 3 is a partially longitudinal side view showing a state before placing the concrete in a usage state of the formwork floating support. FIG. 4 is a longitudinal side view for explaining the work situation when the concrete formwork is dismantled and removed from the state shown in FIG. 3 after the concrete is placed and cured.

  In FIG. 1, reference numeral 1 denotes a mold floating support, and 2 denotes a fitting member which is a plastic molded product. The formwork floating support 1 is composed of an attachment part 3 for the vertical stripe T in the vertical direction and a formwork support arm 4 provided horizontally from the attachment part 3. The attachment portion 3 is configured to press and fix the fitting portion 5 that can be fitted to the vertical stripe T from either the left or right side by turning upside down, and the vertical stripe T fitted in the fitting portion 5. And fastening bolts 6 to be configured. The fitting portion 5 is externally abutted to the vertical stripe T, and has a vertical stripe receiving portion 5a whose planar shape is recessed in a V shape, and is connected to one end of the vertical stripe receiving portion 5a. The plate portion 5b is provided with a through screw hole 5c through which the fastening bolt 6 is screwed and penetrated in the perspective direction with respect to the longitudinal bar receiving portion 5a. The fitting portion 5 is integrally formed with a reinforcing rib 5d that protrudes outward over the entire area. The mold support arm 4 is arranged so that the plate surface is vertically oriented from the free end of the plate part 5 b of the fitting part 5, and the upper side of the mold support arm 4 and the upper part of the fitting part 5. It is comprised from the strip | belt-shaped board 4a integrally bent in the direction away from the vertical streak receiving part 5a so that a side may become the same height.

  As shown in FIGS. 1A to 2C, the fitting member 2 that is a plastic molded product has a flat upper surface 2 a for supporting a formwork, and has an elliptical shape in which both ends 2 b and 2 c in the length direction project in a semicircular shape. A planar shape, a side surface shape having a semicircular circumferential surface 2d whose center is located near the center in the length direction of the upper surface 2a for supporting the formwork, and both the left and right side surfaces 2e and 2f are inclined to be constricted and The two side surfaces 2e and 2f are formed so as to have a front shape connected by the arc-shaped lower end surface 2g, and the lower half portion has the fitting member 2 at the center position in the left-right width direction. A concave groove portion 7 is formed along the length direction of the fitting member 2. The concave groove portion 7 has a bottom surface 7a parallel to the mold support upper surface 2a, and opens in an arc shape along the arc-shaped peripheral surface 2d including the arc-shaped lower end surface 2g. In addition, a vertical hole 8 is formed in the upper half of the fitting member 2 so as to open at the center position of the mold support upper surface 2a and to be perpendicular to the mold support upper surface 2a. In the upper half of the fitting member 2, concave portions 9 a and 9 b for material saving and molding distortion prevention are formed on both sides of the vertical hole 8 in the longitudinal direction of the fitting member 2.

  As shown in FIG. 3, the formwork floating support 1 having the above-described structure is used for constructing a vertical wall from a concrete placing space A for building a floor slab by receiving a vertical bar receiving portion 5 a in a fitting portion 5 of a mounting portion 3. The fastening bolt 6 is screwed in a state of being fitted from the side to the vertical reinforcing bar F arranged in the concrete placement space B, and the tip of the fastening bolt 6 and the fitting portion 5 are The vertical streak T is sandwiched between the vertical streak receiving portion 5a and attached to a predetermined height of the vertical streak T. The mounting height of the mold floating support 1 with respect to the vertical streak T rises. The vertical streak T is marked with a height obtained by subtracting the height from the bottom surface 7a of the concave groove 7 in the fitting member 2 to the top surface 2a for supporting the formwork from the lower end height of the concrete formwork K for constructing the wall. The upper side of the form support arm 4, that is, the fitting portion It can be determined by matching the upper edge to the mark. Further, when the mold floating support 1 is attached to the vertical stripe T, the orientation of the mold support arm 4 with respect to the vertical stripe T is determined before the fastening bolt 6 is completely tightened.

  Next, the concave groove portion 7 of the fitting member 2 is fitted to the upper side of the mold supporting arm 4 in the mold floating support 1 from above, and the position of the upper surface 2a for supporting the mold of the fitting member 2 is positioned. However, the fitting member 2 is slid back and forth along the upper side of the mold support arm 4 so as to be in a position suitable for supporting the lower end surface of the concrete mold K. In this state, the concrete mold K is disposed at a predetermined position, and the lower end surface of the concrete mold K is placed and supported on the mold support upper surface 2 a of the fitting member 2. In this state, after providing necessary reinforcement in the concrete placement space A for floor slab construction, the concrete is placed in the concrete placement space A for floor slab construction and the concrete placement space B for riser wall construction. The concrete surface that has been cast and placed in the concrete placing space A for building a slab is finished flush with the lower end surface of the concrete formwork K, and then cured for a predetermined period.

  When the floor slab S and the rising wall W are completed by curing for a predetermined period, the concrete formwork K is dismantled and removed, but the floor slab S whose surface is finished to the same level as the lower end surface of the concrete formwork K is used. Since the upper surface 2a for supporting the formwork of the fitting member 2 is exposed at the position corresponding to the lower end surface of the concrete formwork K, the upper surface for supporting the formwork of the fitting member 2 as shown in FIG. The tip of a rod-like tool T such as Shino is inserted into the vertical hole 8 opened in 2a and is tilted to the near side away from the rising wall W, and the fitting member 2 is lifted up.

  As a result of the lifting operation on the fitting member 2 described above, the fitting member 2 has a fulcrum at the intersection of the front end of the bottom surface 7a of the concave groove portion 7 and the upper side of the formwork supporting arm 4, A rotational force in a direction in which the back side near the rising wall W is lifted acts, and the fitting member 2 moves so that the back side rises while rotating from the recessed portion Sa formed in the floor slab S by the fitting member 2. Therefore, the fitting member 2 floating on the upper side of the floor slab S is removed from the floor slab S by actively pulling the fitting member 2 straight up with hands or tools as necessary. I can do it. When the fitting member 2 is removed, the recessed portion Sa remaining afterwards, that is, the recessed portion Sa having the same shape as the fitting member 2 is filled with mortar to finish the surface, thereby being embedded in the floor slab S. A concrete covering thickness corresponding to the height between the bottom surface 7a of the recessed groove portion 7 of the fitting member 2 and the upper surface 2a for supporting the formwork is secured on the upper side of the mold floating support 1 in the killed state. A part of the mold floating support 1 is not exposed on the surface side of the floor slab S.

  The overall shape of the fitting member 2 is optimally the shape shown in the above embodiment, but the minimum necessary condition regarding the shape of the fitting member 2 is the form of the fitting member 2. The front shape of the fitting member 2 viewed from the front end side of the support arm 4 is a shape in which the width of the lower end is not wider than the width of the upper end, and from the upper side of the mold support arm 4 of the fitting member 2 The side surface shape of the lower portion is a shape in which the width in the length direction of the mold support arm 4 is shorter toward the lower end side.

  The formwork floating support according to the present invention, when the floor slab and the rising wall rising from the floor slab are constructed integrally, the lower end of the concrete formwork for the rising wall construction is connected to the concrete casting for the rising wall construction. It can be used as a means to support the vertical bars arranged in the installation space.

DESCRIPTION OF SYMBOLS 1 Formwork floating support 2 Fitting member 2a Formwork support upper surface 2b, 2c Both ends of length direction 2d Semicircular peripheral surface 2e, 2f Left and right both sides 2g Arc-shaped lower end surface 3 Mounting part 4 Moldwork support arm DESCRIPTION OF SYMBOLS 5 Fitting part 6 Fastening bolt 7 Groove part 7a Bottom face 8 Vertical hole 9a, 9b Concave part A Concrete placement space for floor slab construction B Concrete placement space for rising wall construction F Reinforcement K Concrete formwork S Floor Plate Sa Recessed part T Shino and other stick tools W Rising wall

Claims (6)

  A formwork floating support comprising: a mounting part for a vertical member such as a reinforcing bar; and a formwork supporting arm made of a belt-like plate material which is horizontally provided continuously from the mounting part and whose plate surface is vertically oriented. A fitting member to be fitted to the upper side of the supporting arm is provided, and this fitting member has a flat upper surface for supporting the formwork, and the lower part thereof has a length direction of the arm for supporting the formwork. A concave groove that is slidably fitted is provided on the front surface of the fitting member as viewed from the front end side of the mold support arm, and the width of the lower end is not wider than the width of the upper end. The shape of the side surface of the lower part from the upper side of the mold supporting arm of the joint member is such that the width in the length direction of the mold supporting arm is shorter toward the lower end side, and the concave portion of the fitting member is In the upper part above the groove part, an opening is made in the flat upper surface for supporting the formwork The tip of Jo operating portion can be inserted perpendicular holes are provided, formwork floated support.   2. The formwork floating support according to claim 1, wherein a planar shape of the fitting member is a horizontally long shape that is long in a length direction of the formwork support arm.   The formwork floating support according to claim 1 or 2, wherein a side surface shape of the lower part of the fitting member from the upper side of the formwork support arm is an arc shape.   The formwork floating support according to any one of claims 1 to 3, wherein an overall side surface shape of the fitting member is a semicircular arc shape.   The formwork floating support according to any one of claims 1 to 4, wherein the entire front shape of the fitting member is constricted and the lower end is a protruding arc shape. The formwork floating support according to any one of claims 1 to 5, wherein the entire planar shape of the fitting member is an oval.

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