JP3209461U - Formwork holder - Google Patents

Abstract

The present invention provides a mold holder that can reliably prevent a tip end of a joint nut from protruding from a concrete wall surface after curing of the concrete even when the mold is assembled using the mold holder. A joint nut 12, a shaft foot 11, and a support member 13 are provided. The support member 13 includes a shaft foot side sleeve portion 13a into which the shaft foot 11 is inserted, and a mold frame on the lower end portion side of the shaft foot side sleeve portion. A disk-shaped flange portion 13b that supports the frame by contacting the inner surface of the disk-shaped flange portion, and a recess 13c in which the shaft foot flange portion 11b of the shaft foot fits on the back side of the disk-shaped flange portion. The nut 12 has a nut-side sleeve portion 13d that is substantially the same as the outer diameter of the nut 12 and that the joint nut fits inside, and that the tip end portion extends to abut against the nut intermediate flange portion 12b of the joint nut. [Selection] Figure 2

Description

  The present invention relates to a mold holder for fixing and holding two mold plates (companies) forming a concrete placement space at a predetermined distance from each other.

  In general, when constructing a concrete wall, a concrete placement space is formed by fixing and holding two form plates at a predetermined interval with a round separator, and ready-mixed concrete is placed in the concrete placement space. I try to set it up. As a form holder for constructing such a concrete wall body, for example, a technique disclosed in registered utility model No. 3162898 is known.

  The formwork holder described in this gazette includes a joint nut that is screwed into a male screw part formed at the shaft end part of a round separator, and a shaft leg of the joint nut that is inserted through an insertion hole formed in the formwork plate. A shaft foot that is screwed into the side female screw portion, a support member that stops by the flange portion of the shaft foot and supports the form plate (referred to as a P guard in this prior art), and the like.

Registered Utility Model No. 3162898

  By the way, in the formwork holder described in Patent Document 1, when these formwork holders are used to form a formwork, joint nuts are screwed to both sides of the separator, and joint nuts are provided from the opposite side. The shaft foot is screwed onto the support member via the support member, and the mold plate (compane) is fitted to the mold side screw portions of the left and right shaft feet.

  After that, hit the vertical single pipe or pier from the outside of the formwork panel (panel), hit the horizontal single pipe from the outside, fit the formwork binding tool such as Foam Tie (registered trademark) from the outside of the horizontal single pipe, and impact The nut of the formwork tightening tool is tightened with an electric tool such as a wrench, and fixed so that the distance between the formwork plates (panels) becomes a predetermined distance corresponding to the wall thickness.

  However, if the worker is not an expert, it is difficult to adjust the force of an electric tool such as an impact wrench. When the nut of a formwork tightening tool is tightened with an electric tool such as an impact wrench, the tightening force of the nut becomes excessive and the joint The tip of the nut sometimes pierced the support member.

  For this reason, when concrete is poured between the mold plates (companies) as it is, there is a problem that the end of the joint nut protrudes from the wall surface of the concrete after curing of the concrete.

  In particular, since power tools such as recent impact wrenches are powerful, if the worker is not an expert, it is difficult to adjust the power of the power tool, and the joint nut tip protrudes from the concrete wall after curing the concrete. There were many.

  Therefore, when the front end portion of the joint nut protrudes from the concrete wall surface, an extra work such as cutting the front end portion of the joint nut protruding from the concrete wall surface after curing of the concrete is required.

  Therefore, the present invention has been made paying attention to such problems, and even when a formwork is assembled using a formwork holder, the joint nut tip protrudes from the concrete wall after curing the concrete. It is an object of the present invention to provide a mold holder that can reliably prevent this.

In order to achieve the above object, the mold holder according to the present invention is screwed into male screw portions formed at both ends of a round separator, and holds a pair of mold plates separated by a predetermined distance. And a joint nut, a shaft foot, and a support member. The joint nut has a male threaded portion of the round separator and a male threaded portion of the shaft foot screwed on the inner surface of the joint nut body. On the other hand, a nut intermediate flange that protrudes outward in the middle in the longitudinal direction of the outer surface of the joint nut body is provided, and the shaft foot has male screw portions at both ends thereof. The shaft portion formed and a shaft foot flange portion that contacts the shaft foot side end portion of the joint nut. The support member includes a shaft foot side sleeve portion into which the shaft foot is inserted, and the shaft foot side sleeve portion. Abuts the formwork on the lower end side And has a disc-shaped flange portion that supports the formwork, and a concave portion in which the shaft foot flange portion of the shaft foot fits on the back side of the disc-shaped flange portion, and an inner diameter standing from the outer periphery of the concave portion, the outer diameter of the joint nut And a nut-side sleeve portion that extends until the joint nut is fitted inside, and the tip portion abuts against the nut intermediate flange portion of the joint nut.
Here, it is preferable that the nut intermediate flange portion is provided outward at a half point in the longitudinal direction of the outer surface of the joint nut body.
The support member may be further formed by mixing glass with synthetic resin.

The formwork holder according to the present invention includes a joint nut, a shaft foot, and a support member. The support member includes a shaft foot side sleeve portion into which the shaft foot is inserted, and a lower end portion of the shaft foot side sleeve portion. It has a disk-like flange part that contacts the formwork on the side and supports the formwork, and a recessed part in which the shaft leg flange part of the shaft foot fits on the back side of the disk-like flange part, The nut side sleeve portion has an inner diameter that is substantially the same as the outer diameter of the joint nut, the joint nut is fitted inside, and the tip end portion extends to abut against the nut intermediate flange portion of the joint nut.
As a result, even when the formwork is assembled by tightening the nut of the formwork tightening tool using an electric tool such as an impact wrench when assembling the formwork using this formwork holder, the disk shape of the support member The tip of the nut-side sleeve on the back side of the flange abuts the nut intermediate flange of the joint nut and restricts the movement of the joint nut in the mold direction relative to the support member. The end portion and the shaft foot flange portion of the shaft foot are prevented from breaking through the disc-shaped flange portion of the support member.
As a result, it is possible to reliably prevent the tip of the joint nut from protruding from the wall surface of the concrete after curing the concrete.

It is a disassembled perspective view of the formwork holder of Embodiment 1 concerning the present invention. It is sectional drawing of the formwork holder of Embodiment 1 which concerns on this invention. (A), (b) It is the perspective view and sectional drawing of the support member which respectively comprise the formwork holder of Embodiment 1. It is sectional drawing which shows an example of the concrete formwork constructed | assembled with the formwork holder of Embodiment 1, a round separator, and a pair of formwork board. (A), (b) It is a partial expanded sectional view of the mold holder vicinity of Embodiment 1 in FIG. 4, respectively, and the partially expanded sectional view which shows the state which poured concrete. (A)-(c) It is an exploded perspective view which shows the procedure until it caps, after curing concrete using the mold holder of Embodiment 1, respectively.

  Next, the mold holder 1 according to the embodiment of the present invention will be described. Note that the formwork holder 1 according to the embodiment is merely an example of the formwork holder according to the present invention, and can be appropriately changed within the scope of the technical idea of the present invention.

  As shown in FIG. 4 to be described later, the mold holder 1 according to the first embodiment of the present invention is attached to a pair of mold holders 1 and 1 at both ends of the round separator 2. 1, each holding a form plate (compane) 3 and 3, and fixing a pair of form plates 3 and 3 at a predetermined interval according to the wall thickness to form a concrete placement space. As shown in FIGS. 1 and 2, the shaft foot 11, the joint nut 12, and the support member 13 are included.

<Axis foot 11>
As shown in FIGS. 1 and 2, the shaft foot 11 has a separator-side male screw portion 11 a 1 formed on the outer periphery of the lower end portion and a mold-frame side screw portion 11 a 2 formed on the outer periphery of the upper end portion. The separator-side male screw portion 11a1 is screwed into the support member 13 so as to face the round separator 2 as shown in FIG. 2 and the like, while the mold-side screw portion 11a2 is As shown in FIG. 4 and the like, it is projected out of the mold plate (compane) 3 through the mold plate (compane) 3 and is called form tie (registered trademark) through the vertical single tube 61 and the horizontal single tube 62. The mold is fastened with the mold binding tool 5 so as to be at a predetermined interval according to the wall thickness of the mold plates (panels) 3 and 3.

  It should be noted that when tightening with the formwork binding tool 5 and adjusting the distance between the formwork plates (panels) 3, 3, the nut 52 screwed into the threaded portion 51 of the formwork connection tool 5 is impacted. It is tightened and adjusted by rotating it with a power tool 7 such as a wrench (see FIG. 6A).

  Further, as shown in FIG. 1 and the like, a shaft leg flange portion 11b erected vertically is provided at an intermediate portion where the separator-side male screw portion 11a1 and the mold-frame side screw portion 11a2 are not formed in the shaft portion 11a. Yes. Here, the outer diameter of the shaft portion 11a is R1, and the outer diameter of the shaft foot flange portion 11b is R2.

<Joint nut 12>
The joint nut 12 includes a cylindrical joint nut main body 12a having an outer diameter R3 larger than the outer diameter R2 of the shaft foot flange portion 11b of the shaft foot 11, and an outer peripheral side of the joint nut main body 12a and the joint nut main body 12a. A nut intermediate flange portion 12b having an outer diameter R4 larger than the outer diameter R3 of the joint nut body 12a projecting outward at a half point which is an intermediate point in the longitudinal direction.

  Formed on the inner periphery of the joint nut body 12a is a female screw portion 12a1 into which a male screw portion of the round separator 2 described later and a separate male screw portion 11a1 of the shaft foot 11 are screwed. The joint nut main body 12a has a through-hole and a female screw portion 12a1 formed therein, or an inner wall formed on the inner side where the nut intermediate flange portion 12b is formed. The female screw portion 12a1 in which the male screw portion of the separator 2 and the separate male screw portion 11a1 of the shaft foot 11 are screwed may be formed independently.

<Support member 13>
The support member 13 is made of, for example, a synthetic resin containing about 30% of a glass material. As shown in FIGS. 3A and 3B, the support member 13 has a predetermined length shaft having an inner diameter through which the shaft foot 11 is inserted. A foot-side sleeve portion 13a and a disk-like disc-shaped flange portion 13b that abuts the mold plate (compane) 3 and supports the mold plate (compane) 3 on the lower end side of the shaft foot-side sleeve portion 13a. .

  Here, the shaft foot side sleeve portion 13a of the support member 13 is formed such that the outer diameter gradually decreases from the base portion toward the distal end portion.

  On the back side of the disc-shaped flange portion 13b of the support member 13, as shown in FIG. 2 (a), FIG. 3 (a), (b), etc., a recess 13c into which the shaft foot flange portion 11b of the shaft foot 11 is fitted, Standing from the outer periphery of the concave portion 13c, the inner diameter is substantially the same as the outer diameter R3 of the joint nut 12, the joint nut 12 is fitted inside, and the tip portion extends until it abuts against the nut intermediate flange portion 12b of the joint nut 12. It has a nut side sleeve portion 13d which is an annular convex portion.

  Here, as shown in FIG. 3 (b), the outer diameter of the disc-shaped flange portion 13b of the support member 13 is R5, the outer diameter of the nut-side sleeve portion 13d is R6, the inner diameter of the nut-side sleeve portion 13d is R7, and the concave portion. When the outer diameter of 13c is R8, the following relationship is established.

  R5> R4 ≧ R6> R3 = R7> R8 ≧ R2> R1

  As shown in FIG. 4 to be described later, when the support member 13 is removed together with the mold plate 3 and the shaft foot 11 after curing the concrete, the support member 13 is disposed on the outer periphery of the joint nut body 12a on the shaft foot 11 side. The gap in which the nut side sleeve portion 13d is fitted remains, and the cap 8 is fitted as described later in order to close the exposed portion after removal of the nut side sleeve portion 13d.

  Here, the outer diameter of the disc-shaped lid portion of the cap 8 is substantially the same as the outer diameter R5 of the nut-side sleeve portion 13d of the support member 13.

<Operation of Form Holder 1 of Embodiment>

  Next, a procedure from the curing of the concrete 4 using the mold holder 1 of the embodiment configured as described above to the cap 8 will be described.

  First, by using a plurality of the mold holder 1, the round separator 2, the mold plate (panel) 3 and the like of the first embodiment, the mold plates (companes) 3 and 3 are attached at predetermined intervals according to the wall thickness. Deploy.

  Specifically, as shown in FIG. 5A which is an enlarged cross-sectional view of the main part in FIG. 4 and FIG. 4, female screw portions 12 a 1 of the joint nut 12 are respectively connected to the male screw portions 2 a and 2 a on both sides of the round separator 2. And a separate male screw portion 11a1 of the shaft foot 11 from the opposite side to the female screw portion 12a1 of the joint nut 12 via the support member 13 to form a frame for the left and right shaft feet 11, 11. The formwork plates (panels) 3 and 3 are fitted to the side screw portions 11a2 and 11a2. In FIG. 4, the left and right mold plates (companes) 3 and 3 are illustrated, but in FIG. 5 and subsequent figures, only one mold plate (compane) 3 is illustrated.

  When the mold plate (companies) 3 and 3 are respectively fitted to the mold side screw portions 11a2 and 11a2 of the left and right shaft legs 11 and 11, the mold plates (companies) 3 and 3 are formed in a disk shape of the support members 13 and 13, respectively. Stops in contact with the flange portions 13b, 13b.

  After that, since it is necessary to fix the mold plates 3 and 3, the vertical single pipe 61 is applied from the outside of the mold plates 3 and 3, and the horizontal single tube 62 is applied from the outside thereof. Fit the formwork binding tool 5 such as foam tie (registered trademark) from the outside of the tube 62, rotate the nut 52 of the formwork tightening tool 5 with an electric tool 7 such as an impact wrench (see FIG. 6A), Tightening is performed so that the interval between the mold plates (panels) 3 and 3 becomes a predetermined interval corresponding to the wall thickness.

  Then, the vertical single pipe 61 and the horizontal single pipe 62 push the mold plates (companes) 3 and 3 inward by the nuts 52 of the mold fastening tool 5, while joint nuts 12 and 12 are provided on both sides of the round separator 2. Since the shaft feet 11 and 11 are screwed and fixed to the opposite side of the joint nuts 12 and 12, the joint nuts 12 and 12 and the shaft are attached to the mold plates 3 and 3, respectively. The feet 11 and 11 are relatively pushed outward, and the end portion of the joint nut body 12a on the mold plate side and the shaft foot flange portion 11b of the shaft foot 12 break through the disk-like flange portion 13b of the support member 13. I will try.

  In particular, recently, an electric power tool 7 such as an impact wrench is often used for construction of a formwork, and the electric power tool 7 such as an impact wrench is powerful. It is difficult to adjust, and the end of the joint nut body 12a on the mold plate side and the shaft foot flange portion 11b of the shaft foot 12 break through the disk-like flange portion 13b of the support member 13, and after curing the concrete 4, the joint nut starts from the wall surface of the concrete 4. In many cases, the 12 tips protruded.

  However, in the mold holder 1 of the first embodiment, the tip of the nut-side sleeve portion 13d on the back side of the disc-shaped flange portion 13b of the support member 13 abuts on the nut intermediate flange portion 12b of the joint nut 12, and the support member In order to restrict the movement of the joint nut 12 in the direction of the mold plate (panel) 3 with respect to 13, the end portion of the joint nut 12 on the mold plate side and the shaft foot flange portion 11 b of the shaft foot 12 are the disc-shaped flange of the support member 13. Protruding the part 13b is prevented.

  Therefore, after adjusting the pair of mold plates (companies) 3 and 3 to a predetermined interval, as shown in FIG. 5 (b), in the concrete placement space sandwiched between the pair of mold plates 3 and 3 After pouring the concrete 4 and curing the concrete 4 after a predetermined period of time, the formwork binding tool 5 is removed, and then the shaft foot as shown in FIG. 11, even when the support member 13 is pulled out, it is possible to reliably prevent the tip end portion of the joint nut 12 from protruding from the wall surface of the concrete 4, that is, the mold plate side end portion of the joint nut body 12 a.

  When the shaft foot 11 and the support member 13 are removed from the wall surface of the hardened concrete 4, the nut side sleeve of the support member 13 is placed on the surface of the hardened concrete 4 as shown in FIGS. 6 (a) and 6 (b). A recess from which the portion 13d and the like are removed is formed.

  Therefore, as shown in FIGS. 6 (b) and 6 (c), the operator removes the recess after removing the nut-side sleeve portion 13 d of the nut intermediate flange portion 12 b of the joint nut 12 with a cap 8 made of synthetic resin or concrete. Plug with.

  As described above, the mold holder 1 of the present embodiment includes the shaft foot 11, the joint nut 12, and the support member 13, and the support member 13 is a shaft foot side sleeve into which the shaft foot 11 is inserted. And a disc-shaped flange 13b that supports the mold by contacting the mold on the lower end side of the shaft-foot-side sleeve 13a, and a shaft of the shaft foot 11 on the back side of the disc-shaped flange 13b. A recess 13c into which the foot flange portion 11b fits, a standup from the outer periphery of the recess 13c, the inner diameter is substantially the same as the outer diameter of the joint nut 12, the joint nut 12 fits inward, and the tip is a nut of the joint nut 12 The nut-side sleeve portion 13d extends until it comes into contact with the intermediate flange portion 12b.

  Therefore, even when the formwork is constructed by tightening the nut 52 of the formwork tightening tool 5 using the electric tool 7 such as an impact wrench when the formwork is assembled using the formwork holder 1 of the embodiment, The tip of the nut-side sleeve portion 13c on the back side of the disc-like flange portion 13b of the support member 13 abuts on the nut intermediate flange portion 12b of the joint nut 12, and the joint nut 12 moves relative to the support member 13 in the mold direction. Therefore, the end of the joint nut body 12a and the shaft foot flange portion 11b of the shaft foot 11 are prevented from breaking through the disk-like flange portion 13b of the support member 13.

  As a result, it is possible to reliably prevent the end of the joint nut 12 from protruding from the wall surface of the concrete 4 after curing of the concrete 4, that is, the end of the joint nut main body 12a on the mold plate side.

  Further, in the formwork holder 1 of the embodiment, the joint nut 12 protrudes outward at a half point in the longitudinal direction of the joint nut body 12a on the outer peripheral side of the joint nut body 12a. A nut intermediate flange portion 12b is provided. However, the position where the nut intermediate flange portion 12b is provided is not limited to a half point in the longitudinal direction of the joint nut body 12a, and may be an intermediate point such as 1/3, 1/4, or 2/5. May not be at both ends in the longitudinal direction of the joint nut body 12a.

  For this reason, the nut-side sleeve portion 13d of the support member 13 only needs to be secured for approximately ½ of the longitudinal direction of the joint nut body 12a, so that the length for the entire length of the joint nut body 12a in the longitudinal direction is secured. In addition, the member cost of the support member 13 and the cap 8 can be reduced, and the nut-side sleeve portion 13d of the support member 13 is not too short. Workability can be improved while securely fitting 8 so as not to come off.

  Further, since the nut intermediate flange portion 12b of the joint nut 12 is provided at a half point which is an intermediate point in the longitudinal direction of the joint nut body 12a, the joint nut 12 has either the upper or lower end or the left or right end on the round separator 2 side. This eliminates the need to worry about whether to use the shaft foot 11 or not, and this also improves workability.

  Further, in the mold holder 1 of the embodiment, since the support member 13 is made of a synthetic resin containing about 30% glass material, the support member 13 is more rigid than the case where the glass material is not included, and the mold of the joint nut body 12a. It is possible to further prevent the plate-side end portion or the like from breaking through the disc-shaped flange portion 13b of the support member 13.

DESCRIPTION OF SYMBOLS 1 Formwork holder 11 Shaft foot 11a Shaft part 11b Shaft foot flange part 12 Joint nut 12a Joint nut main body 12a1 Female thread part 12b Nut intermediate flange part 13 Support member 13a Shaft leg side sleeve part 13b Disc-shaped flange part 13c Recessed part 13d Nut Side sleeve part 2 Round separator 3 Form plate 4 Concrete 5 Formwork binding tool 61 Vertical single pipe 62 Horizontal single pipe 7 Electric tool 8 Cap

Claims (3)

A mold holder that is screwed into male thread portions formed at both ends of a round separator, and holds a pair of mold plates separated by a predetermined distance,
It includes a joint nut, a shaft foot, and a support member.
The joint nut is provided with a female threaded portion in which the male threaded part of the round separator and the male threaded part of the shaft foot are screwed on the inner side surface of the joint nut body, while the joint nut body has a middle portion in the longitudinal direction of the outer surface of the joint nut body. A nut intermediate flange that protrudes outward is provided,
The shaft foot has a shaft portion in which male screw portions are formed at both ends thereof, and a shaft foot flange portion that contacts the shaft foot side end portion of the joint nut,
The support member has a shaft foot side sleeve portion into which the shaft foot is inserted, and a disk-like flange portion that contacts the mold frame and supports the mold frame on the lower end side of the shaft foot side sleeve portion, and the disk shape A recess where the shaft foot flange part of the shaft foot fits on the back side of the flange part, standing from the outer periphery of the recess, the inner diameter is almost the same as the outer diameter of the joint nut, the joint nut fits inside, and the tip part is the joint A mold holder having a nut-side sleeve portion extending to abut against a nut intermediate flange portion of the nut. The mold holder according to claim 1,
The said intermediate | middle intermediate | middle flange part is provided toward the outer side in the half point of the longitudinal direction of the outer surface of the said joint nut main body, The mold holder characterized by the above-mentioned. The mold holder according to claim 1 or 2,
A mold holder for the support member, wherein glass is mixed with synthetic resin.

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