JP2010261172A - Corner-tightening fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a conventional corner-tightening fitting is subjected to be used in a case only when an equal concrete placing pressure is applied to a horizontal batten on one side and other side of a corner portion, and thus is not practical as a premise. <P>SOLUTION: Of the corner tightening fittings 1, each of a pair (of corner tightening fittings 1A and 1B) includes: an insertion portion 1Aa for inserting the batten; a connecting portion 1Ab which is provided one end of the insertion portion 1Aa in the height-direction, in which a pivoted hole 1Ac is formed on one end side of the insertion portion 1Aa in the batten-insertion-direction as well as in a position near the insertion portion 1Aa, and in which a corner-tightening hole 1Ad is formed on other end side of the insertion portion 1Aa in the batten-insertion-direction as well as in a position far from the insertion portion 1Aa; and a reinforcing portion 1Ae which is provided across the connecting portion 1Ab and the insertion portion 1Aa. Additionally, the corner-tightening fitting also includes: a pivoted member Y which is inserted into the pivoted holes 1Ac and 1Bc when the backside of one of the pair of the connecting portions 1Ab and the front side of the other connecting portion 1Bb are overlapped with each other; and a corner tightening member W to be inserted into the corner tightening holes 1Ad and 1Bd. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a square fastener for easily and surely fixing and supporting a formwork used when a corner portion having a corner portion exposed in a space is made of concrete with a horizontal end.

  In order to construct a structure with concrete, it is necessary to arrange a formwork so as to have the shape of the structure at the site before placing the concrete. For example, when building a wall surface, the mold frames are arranged opposite to each other, and between the mold frames, a steel material for binding between the mold frames called a separator is provided, and the space between the mold frames is opened by the concrete placing pressure. (Or close the formwork before placing concrete). The end thickness is provided on the outer side of the mold, and the end thickness is fixed or supported from the outside to further fix the mold.

  In the case of a structure in which a separator can be provided between the molds, such as the above wall surface, the mold can be securely fixed by the separator and the end thickness, but the corners are exposed in the space. For example, in the corner part comprised by the edge parts of a wall surface, fixation of a formwork is not easy.

  The reason for this is, for example, in the case where a right-angled corner is constructed. As described above, the formwork is arranged opposite to the inside and outside of the corner as described above, but the “outside” of the corner should be configured. At the end of each of the orthogonal molds provided from one and the other, there is no inner mold facing the ends of both outer molds by the thickness of the wall, and therefore the separator It cannot be provided.

  It should be noted that at the ends of both orthogonal molds provided from one and the other constituting the “inner side” of the corner part, the outer part (from the corner part to the corner part) facing the end parts of both inner molds Since a formwork exists, a separator can be provided.

  Therefore, only the corner portion is not fixed with a normal mold using a separator, and the mold is fixed by a fixing technique called so-called square clamping using only a thick end. In the corner fastening, on the outside of the formwork, the horizontal end thickness is provided by vertically intersecting from one and the other toward the corner portion at the corner portion, and the vertical end thickness is provided outside the intersecting portion. Is pulled evenly from one and the other by a chain with a turnbuckle or a linear steel material.

  According to the above-mentioned corner tightening method, the vertical end thickness is pulled from one side and the other side, so that the vertical side is resisted against the pouring pressure at the time of placing concrete to open one and the other formwork outside the corner portion. Since the outward movement of the corner portion of the end is prohibited, one and the other formwork outside the corner portion are fixed (corner tightening is performed).

  However, in the above-mentioned angle-clamping method, it is necessary to pull the vertical edge equally from one and the other, and even if it tries to pull it evenly, it will require at least 2 workers. In addition, there is a problem that it takes time and labor, for example, when one worker is going to perform the adjustment while reciprocating one and the other many times in a small site.

  Therefore, in the following Patent Documents 1 and 2, in order to solve the problem of the above-described corner tightening method, one and the other horizontal end thickness provided in a cross shape outside the corner portion are fixed to each other. Square fasteners have been proposed.

Japanese Patent Laid-Open No. 11-293916 No. 7-6352

  Patent Document 1 discloses a first support portion in which a lower surface and two side surfaces adjacent to the lower surface are opened, and a hole for inserting a wedge-shaped fastener is formed in a lower portion of two opposite side surfaces that are not opened, The first support portion extends perpendicularly to the upper surface adjacent to one of the two open side surfaces, and a hook-shaped portion is formed at the end of the extended portion opposite to the upper surface. In addition, a square fastener having an integrated second support portion is shown.

  The square metal fitting of Patent Document 1 is inserted in the open space of the first support portion (for example, one of the horizontal end thicknesses below one of the horizontal end thicknesses of one and the other) and positioned above (for example, the other side) The horizontal end of the second support part is engaged with the hook-like part of the second support part, and a fastener is inserted into the holes on the two side surfaces of the first support part that are not opened, The other horizontal end thickness is fixed to each other.

  In Patent Document 2, there are three surfaces in which a straight main body frame and holes at both ends of the main body frame are formed parallel to the straight direction of the main body frame and into which pins can be inserted at the ends in the straight direction. The upper and lower two-stage fitting portions are formed by the above, and a frame member provided so as to open to the outside at an angle of 45 ° with respect to the main body frame, and a screwing member is screwed into the linear center of the main body frame. A square fastener having a screw hole and an abutment for pushing a vertical end thickness provided in the corner portion (inward in the corner portion) by the screwing member is shown.

  The square fastener of Patent Document 2 has one horizontal end thickness at the corner portion at the upper fitting portion of one frame member and the other horizontal end thickness at the corner portion at the lower fitting portion of the other frame member. Insert and insert a pin into the hole in the fitting part so that one and the other horizontal end do not jump out of the fitting part, and then apply the gold to the vertical end, By screwing the screwing member into the plate and pressing the vertical member through the abutment, one and the other horizontal end thicknesses intersecting each other at the corner are fixed to each other.

  However, in the square fastener of Patent Document 1, the movement in the longitudinal direction of one horizontal end of the first support portion is restricted by inserting a fastener, but the other horizontal end of the second support portion is restricted. Since the thickness is freely movable in the longitudinal direction, when the concrete placement pressure is applied to one horizontal end thickness of the corner portion, that is, when an unequal force is generated, the other horizontal end thickness in the second support portion Has a problem that the formwork cannot be fixed.

  In addition to the above-described configuration, Patent Document 1 shows a configuration in which a pin is inserted into the other horizontal end from a hole formed on the upper surface of the upper portion of the second support portion. There is a problem in that it is necessary to open a hole in the other horizontal end thicker for each corner tightening operation, which is troublesome.

  In addition, when the square fastener of Patent Document 2 is screwed into the corner portion at the center of the linear body frame, the square fastener is against the horizontal end thickness at the fitting portion of one and the other frame member. Therefore, when the concrete placement pressure is evenly applied, the movement in the longitudinal direction is restricted by the contact between the screwing member and the horizontal end.

  However, the square fasteners of Patent Document 2 are also unequally applied to one and the other horizontal end thickness when force is applied unevenly as in Patent Document 1 or when the screw-in member is excessively screwed. The force appears prominently, and as a result, there is a problem in that the horizontal end thickness moves due to the uneven concrete placing pressure and the problem of mounting the square fastener, and the mold cannot be fixed securely.

  The problem to be solved is that the square metal fittings of Patent Document 1 and Patent Document 2 can be used only when a uniform concrete placing pressure is applied to one of the corner portions and the other horizontal end thickness, In the situation of constructing a corner part, there is almost no such concrete casting pressure, and it is not practical.

  In order to solve the above problems, the corner fastener of the present invention is a corner for fixing one end and the other end thickness for supporting a mold outside the corner when the corner is constructed. It is a clamp, provided in each of a pair of cylindrical insertion portions into which end thickness is inserted, and one end portion in the height direction of the insertion portion, on one end side of the insertion portion in the end thickness insertion direction. A flat coupling portion in which a pivot hole is formed at a position close to the insertion portion and a square fastening hole is formed at the other end side in the end insertion direction of the insertion portion and at a position far from the insertion portion, and the coupling portion And a reinforcing portion provided across the insertion portion, and when the back surface of one of the paired coupling portions and the surface of the other coupling portion overlap each other, A pivot support member to be inserted and a corner fastening member to be inserted into the corner fastening hole are provided.

  The corner fastener of the present invention has a pivotal support hole in which a pair of end inserts are inserted into each insertion portion, the back surface of one coupling portion is overlapped with the surface of the other coupling portion, and the overlapping coupling portions communicate with each other. The pivot support member is inserted into the corner fastening member and the corner fastening member is inserted into the corner fastening hole to fix one end and the other end thickness constituting the corner portion.

  The pivot member inserted into the pivot hole is configured such that one end thickness is applied to the outside in the longitudinal direction of the other end thickness through the mold on the outer side of the corner portion, and the other end thickness is set to one end thickness. The force applied to the outside in the longitudinal direction is converted into the rotational motion of the end portion on the corner portion side of one and the other end thickness, respectively.

  For example, the unequal force applied to one end thickness is a movement that rotates around the pivot member in the direction of increasing the angle outside the corner when the corner fastening member is not inserted into the corner fastening hole. At this time, the end of the corner portion of one end thickness tends to be inclined to the end portion side opposite to the corner portion of the other end thickness. By this action, the end portion of the corner portion of one mold frame constituting the outside of the corner portion tends to move in an inclined manner in the joining direction with the other mold frame.

  And when the corner fastening member is inserted into the corner fastening hole, even if an uneven force is applied to one or the other end thickness, the end on the corner portion side does not rotate around the pivotal support member. Even if an unequal force is applied, the end of the corner of one mold forming the outside of the corner does not move in an inclined manner in the joining direction with the other mold as described above. On the other hand, it is prohibited to open one of the molds outside the corner portion.

  In other words, the square fastener of the present invention is such that the linear movement of the end thickness at the corner portion that attempts to open the mold frame outward by the concrete placing pressure is equal to or not equal to one and the other. Although it is converted into a rotational motion that exerts a cornering force outside the corner part centering on the material, the cornering member prohibits the rotational movement, so that the mold can open even if cornering is overly performed. Without any problem, the corners can be securely tightened in an appropriate state.

1A and 1B show a square fastener according to the present invention, in which FIG. 1A is an overall perspective view and FIG. 1B is an exploded perspective view. (Example 1) 2 (a) to 2 (f) are views of one of the corner fasteners of the present invention as viewed from directions A to F in FIG. (Example 1) FIG. 3 shows a corner fastening member used in the corner fastening bracket of the present invention, wherein (a) is a front view and (b) is a side view. (Example 1) FIG. 4 shows a procedure for using the square fastener of the present invention, and is a diagram for explaining a form installation state in a corner portion. (Example 1) FIG. 5 shows a procedure for using the corner fastener of the present invention, and is a diagram for explaining a situation in which a thick end is inserted into the corner fastener of the present invention. (Example 1) FIG. 6 shows a procedure for using the corner fastener of the present invention, and is a view for explaining a situation in which the corner fastener of the present invention with a thick end inserted is arranged. (Example 1) FIG. 7 shows a procedure for using the corner clamp of the present invention, and is a diagram for explaining a situation in which a pivot member and a corner clamp member are provided on the corner clamp of the present invention. (Example 1) FIG. 8 shows a procedure for using the corner fastener of the present invention, and is a diagram for explaining a situation in which corner fastening is performed by the corner fastener of the present invention. (Example 1) FIG. 9 is a view for explaining the operation of the square fastener of the present invention. (Example 1) FIG. 10 is a view for explaining another use situation of the square fastener of the present invention. (Example 2)

  In the present invention, the point that can be used only when the concrete pouring pressure is equally applied to one end and the other end thickness of the corner portion, the movement of the end thicknesses in the longitudinal direction is centered on the pivot member. It is converted to a rotational motion that exhibits the corner clamping force, and this rotational motion is prohibited by the corner fastening member, so that even if the force applied to the end thickness is equal or uneven, The formwork can be properly fixed by the end thickness.

  The square fastener of the present invention will be described with reference to Embodiment 1 with reference to FIGS. 1 to 9 and Embodiment 2 with reference to FIG. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  When the corner fastener X is constructed of the end portions of the wall surface so that the corner portion is exposed in the space as shown in FIG. , T2 for fixing one and the other horizontal end thicknesses P1 and P2 (hereinafter referred to as horizontal end thicknesses P1 and P2) to each other. In addition, when naming generically, it shall write with the formwork T and the horizontal end thick P.

  The square clamp 1 is composed of a pair of square clamps 1A and 1B having the same configuration. In the following, the generic description will be referred to as a square fastener 1. Hereinafter, in order to describe the configuration, the description will be given using one of the square fasteners 1A. One square clamp 1A has an insertion portion 1Aa for inserting one horizontal end thickness P1. In the case of this example, the insertion portion 1 </ b> Aa is similarly cylindrical because one horizontal end thick P <b> 1 uses a rectangular tube. The inner surface dimension of the insertion portion 1Aa is slightly larger than the outer surface dimension of the horizontal end thick P1. By doing so, the insertion workability of the horizontal edge thickness P1 is improved.

  Further, the square metal fitting 1A is provided with a flat coupling portion 1Ab in one end portion in the height direction of the insertion portion 1Aa, for example, at the lower end portion in the state shown in FIG. It has been. In this example, the coupling portion 1Ab is, for example, a square having four sides that are equal in length in the insertion direction of the insertion portion 1Aa.

  A pivot hole 1Ac is formed on the surface of the coupling portion 1Ab at one end side in the insertion direction of one horizontal end thick P1 of the insertion portion 1Aa and at a corner near the insertion portion 1Aa, and the insertion portion 1Aa A corner fastening hole 1Ad is formed at the other end side in the insertion direction of one horizontal end thick P1 and at a corner portion far from the insertion portion 1Aa. That is, the pivot hole 1Ac and the corner fastening hole 1Ad are respectively formed at diagonal positions in the coupling portion 1Ab.

  A bolt Y as a pivot member is inserted into the pivot hole 1Ac, and a wedge W shown in FIG. 3 as a corner clamp member is inserted into the corner clamp hole 1Ad. The wedge W is formed with an inclined portion Wa that gradually increases in width from one tip portion, and lock portions Wb that are slightly narrowed at portions beyond the maximum wide portion of the inclined portion Wa at both ends in the width direction.

  Furthermore, the corner clamp 1A is provided with a reinforcing portion 1Ae on the edge of the side perpendicular to the insertion portion 1Aa on the side where the corner fastening hole 1Ad is formed in the coupling portion 1 and in the entire height direction of the insertion portion 1Aa. ing. The reinforcing portion 1Ae supports the force applied to the end in the height direction where the coupling portion 1Ab of the insertion portion 1Aa is not provided, and reinforces the insertion portion 1Aa so as not to be deformed with respect to the coupling portion 1Ab. Is for.

  As described above, the structure of the square fastener 1B provided on the other horizontal end thick P2 that supports the other mold T2 is the same as that of the square fastener 1A, with the insertion portion 1Ba, the coupling portion 1Bb, and the pivot hole 1Bc. , A square fastening hole 1Bd and a reinforcing part 1Be.

  And, for example, the square fastener 1A and the square fastener 1B are obtained by inverting the square fastener 1B with respect to the square fastener 1A and reversing the sides of the coupling portions 1Ab, 1Bb provided with the insertion portions 1Aa, 1Ba, respectively. In addition, the pivot holes 1Ac and 1Bc and the square holes 1Ad and 1Bd are overlapped and used so as to communicate with each other.

  A usage example of the corner fastener 1 having the above-described configuration will be described with reference to FIGS. As shown in FIG. 4, the formwork T is arrange | positioned inside and outside so that the corner part X may be comprised. 4 to 7, only the outer mold T is used as a mold T1 (one) and a mold T2 (the other) to distinguish one from the other.

  In the inner mold frame T and the outer mold frames T1, T2, for the straight portions other than the corner portions, a separator S is provided to fix the inner mold frame Ti and the outer mold frames T1, T2. The inside of the corner portion X in this example is fixed with a separator S as shown in FIG.

  On the other hand, since the separator S cannot be provided at the end where the molds T1 and T2 are joined to each other outside the corner portion as shown in FIG. 4, the square fastener 1 of the present invention is used. As shown in FIG. 5, the insertion end 1Aa of one square clamp 1A is inserted into one horizontal end thick P1 supporting one mold T1, and the other horizontal end thick supporting the other mold T2 in the same manner. In P2, for example, in this example, the insertion portions 1Ba of the other square fastener 1B that are reversed with respect to one square fastener 1A are inserted.

  Next, as shown in FIG. 6, the corner fasteners 1A and 1B are brought close to the intersecting portion of the horizontal end thicknesses P1 and P2 in the corner portion X, and the pivot holes 1Ac and 1Bc and the corners in the coupling portions 1Ab and 1Bb. Positioning of the fastening holes 1Ad, 1Bd is performed.

  In the case of FIG. 6, first, if the pivot holes 1Ac and 1Bc can be aligned, the bolt Y is barely inserted at that stage as shown in FIG. A nut (no reference number) is barely attached to Y, and the square fasteners 1A and 1B are temporarily fixed via the coupling portions 1Ab and 1Bb.

  In FIG. 7, after temporarily fixing the corner fasteners 1A and 1B, the wedges W are inserted toward the corner fastening holes 1Ad and 1Bd in the communication state of the corner fasteners 1A and 1B, as shown in FIG. The molds T1 and T2 at the corner portion X are supported and fixed by the horizontal end thicknesses P1 and P2.

  Here, the effect | action of the square fastener 1 of this invention is demonstrated using FIG. In FIG. 9, for example, the concrete placement pressure in the corner portion X is not uniform such that one mold T1> the other mold T2, and the wedges W are not inserted into the square holes 1Ad, 1Bd. Explains. The two-dot chain line is exaggerated for easy understanding.

  In FIG. 9, the force F1 applied to one formwork T1 at the corner portion X to open it is applied to one horizontal end thickness P1 along the longitudinal direction of the other horizontal end thickness P2. Try to move towards the edge. At this time, the end portion of the corner portion X of one horizontal end thick P1 is a direction in which the end portion becomes larger from the angle outside the corner portion X around the bolt Y (because the wedge W is not inserted) (> (90 °).

  The rotation of the end portion of the corner portion X of the one horizontal end thickness P1 is performed at the corner of one mold frame T1, as indicated by the two-dot chain line, inside the intersection of one and the other horizontal end thickness P1, P2. The end of the portion X acts so as to incline to the opposite end of the corner of the other mold T2 and X. As a result, in the case of one mold frame T1> the other mold frame T2, one mold frame T1 to which an unevenly large force is applied is directed toward the other mold frame T2.

  Under the above conditions, the action that occurs in one mold T1 in FIG. 9A is that the end opposite to the corner X of one horizontal end P1 is fixed, or the corner of one mold T1 is fixed. Since the portion excluding the portion X is fixed by the separator S, it does not appear as an exaggerated two-dot chain line, but if the wedge W is not inserted, one mold T1 is the other mold A force to move in the joining direction with T2 is applied, and it is certain that corner fastening can be performed so that one mold T1 at the corner portion X does not open.

  Then, the wedges W are inserted into the corner fastening holes 1Ad and 1Bd, and the insertion portions 1Aa and 1Ba are not moved by the rotation of the end portions of the one and the other horizontal end thicknesses P1 and P2 by the reinforcing portions 1Ae and 1Be. Therefore, even if one end of the corner X of the horizontal end P1 around the bolt Y tries to rotate under the condition of one mold T1> the other mold T2, this rotation is allowed. There is no.

  Therefore, the square fastener 1 of the present invention does not tilt the mold T even when an equal force is applied or an uneven force is applied (as indicated by a two-dot chain line). As a result, the molds T1 and T2 outside the corner portion X can be fixed by the one and the other horizontal end thicknesses P1 and P2 without being inclined in the opening direction of the mold T.

  Although FIG. 1-9 demonstrated the situation where the corner part X comprised by the wall surface was exposed to space, as shown in FIG. 10, the square fastener 1 of this invention is a type | mold which builds a prismatic column, for example. It is also suitable for use when the frame T is fixedly supported by the horizontal end thickness P.

  In FIG. 10, the horizontal edge thickness P in the horizontal direction of the paper surface is positioned in front of the horizontal edge thickness P in the vertical direction of the paper surface. Therefore, the square fastener 1 shown in FIGS. The lower right corner X can be used as it is.

  The corner clamp 1 'at the corner X at the upper right and the lower left of FIG. 10 will be described as a corner clamp 1A' representing the corner clamp 1B '. The corner clamp 1Ae' shown in FIG. The reinforcing part 1Ae in the flat part 1Aa of the metal fitting 1A is provided at the end opposite to the insertion direction of the horizontal end thick P1 of the insertion part 1Aa, and the pivotal support hole 1Ac 'and the corner fastening hole 1Ad' are shown in FIG. The pivot hole 1Ac and the square hole 1Ad of the square clamp 1A are located on another diagonal line in the flat portion 1Aa.

  By using the corner fastener 1B ′ having the same configuration as the corner fastener 1A ′, corner fastening can be performed at the corner portion X on the upper right side and the lower left side of the paper surface in FIG. In addition, the formwork T in the case where the prismatic column is constructed of concrete can be fixedly supported by the horizontal end thickness P.

1 1 'square fastener 1A 1A' square fastener (one of a pair)
1Aa Insertion part 1Ab Coupling part 1Ac 1Ac 'Pivot hole 1Ad 1Ad' Square fastening hole 1Ae 1Ae 'Reinforcement part 1B 1B' Square fastening bracket (the other pair)
1Ba Insertion part 1Bb Coupling part 1Bc 1Bc 'Pivot hole 1Bd 1Bd' Square fastening hole 1Be 1Be 'Reinforcement part Y bolt (Pivot member)
W wedge (square fastening member)
X Corner part T Formwork T1 Formwork (one side outside the corner part)
T2 formwork (one side of the outside of the corner)
P Horizontal edge P1 Horizontal edge (one)
P2 Horizontal edge (other side)
S separator

Claims (1)

  A corner clamp for fixing one end and the other end thickness to support a formwork outside the corner portion when constructing the corner portion, and inserting the end thickness into each pair A cylindrical insertion portion and an end of the insertion portion provided at one end portion in the height direction of the insertion portion and at one end side in the end insertion direction of the insertion portion and close to the insertion portion. A flat coupling portion in which a square fastening hole is formed on the other end side in the thick insertion direction and at a position far from the insertion portion, and a reinforcing portion provided between the coupling portion and the insertion portion. Furthermore, a pivot member inserted into the pivot support hole when the back surface of one of the coupling portions and the surface of the other coupling portion that form a pair overlap each other, and a corner clamping member inserted into the corner clamping hole And a square fastener.

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