JP2022026097A - Support for floating form - Google Patents

Abstract

To prevent a form support member from being removed from an arm for form support even when a horizontal force acts on the form support member, and facilitates mounting of the form support member on the arm for form support.SOLUTION: A support for a floating form includes an arm 11 for form support having an arm part 11b formed with a both-ends blocking unit 11b1, and a form support member 12 that is slidably fit to the both-ends blocking unit 11b1 and supports a floating form 3, in which the form support member 12 has an upper side arm part insertion groove part 12b to which an upper side arm part 11b2 above the both-ends blocking unit 11b1 is inserted, and has a long sandwiching piece 12c and a short sandwiching piece 12d that sandwich astride the upper side arm part 11b2 and have different lengths in a vertical direction, the long sandwiching piece 12c is provided with a side projection fit-in part 12c1 inserted to the both-ends blocking slit 11b1 from the side part, and in a state where the side projection fit-in part 12c1 is fit-in to the both-ends blocking unit 11b1, a ceiling surface of the upper side arm part insertion groove part 12b is separated from an upper side face of the upper side arm part 11b2, and a space part is formed therebetween.SELECTED DRAWING: Figure 1

Description

The present invention relates to a support for a floating formwork that is fixed to a vertical bar and supports a concrete floating formwork (hereinafter, abbreviated as a floating formwork) from below.

As a support for floating formwork that is fixed to vertical bars and supports the floating formwork from below, for example, a mounting portion for a vertical member such as a vertical bar is connected horizontally from the mounting portion, and the plate surface is oriented vertically. It is composed of a formwork support arm made of a strip-shaped plate material, and a fitting member that floats on the formwork support arm and supports the formwork from below is supported. The fitting member is formed with a groove portion penetrating in the front-rear length direction for externally fitting and supporting the arm, and the upper end formwork support surface of the fitting member in a state of being supported by the arm through this groove portion. It has been proposed that the height between the arm and the upper end surface of the arm is not less than the concrete covering thickness with respect to the arm (see, for example, Patent Document 1).

In addition, it consists of a vertical bar fixing part that is fixed to the vertical bar by fastening a tightening bolt, and an arm part that extends from the other end of the vertical bar fixing part. A support for a floating formwork has also been proposed in which both end closure slits are formed in the longitudinal direction of the arm portion and the formwork support member is slidably engaged with the both end occlusion slits (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2019-163589 Japanese Unexamined Patent Publication No. 2020-2556

By the way, in such a support for a floating formwork, not only the vertical load due to the weight of the floating formwork and the concrete to be filled, but also the lateral pressure at the time of filling the concrete and the horizontal to the formwork support member at the time of mounting the formwork support member. Horizontal force in the direction acts.

However, in the conventional floating formwork support described in Patent Documents 1 and 2 described above, the groove portion of the formwork support member (in Patent Document 1, although it is a fitting member, hereinafter referred to as a formwork support member) is molded. Since it is only slidably fitted to the frame support arm, when the lateral pressure during concrete filling or the horizontal horizontal force acting on the formwork support member when the formwork support member is attached, the formwork There is a problem that the support member may rotate or come off, and the floating formwork may not be reliably supported.

Further, when a horizontal force is generated in the formwork support member, a horizontal force such as a frictional force is generated in the opposite direction to the contact surface where the formwork support member and the formwork support arm are in contact as the reaction force. Formwork support because the bending moment obtained by multiplying the length (interval) between the contact surface and the fixing point where the formwork support arm is fixed to the vertical bar and the horizontal force acts on the formwork support member. There is also a problem that the formwork support member is easily detached from the arm and the frame support member may not be supported.

Further, in the floating formwork support tool described in Patent Document 2 described above, there is also a problem that it is difficult to attach to the arm portion because the pair of engaging portions of the formwork support member is attached to the arm portion of the formwork support arm. rice field.

Therefore, the present invention has been made in view of such problems, and even if a horizontal force acts on the formwork support member, the formwork support member is made difficult to come off from the formwork support arm, and the floating formwork is ensured. It is an object of the present invention to provide a floating formwork support tool that can be supported by the formwork and that can easily attach a formwork support member to the formwork support arm.

In order to solve the above problem, the support for the floating formwork according to the present invention is bent so that one end side can be attached to the vertical bar, and is fixed to the vertical bar by fastening the tightening bolt. , A formwork support arm extending from the other end of the vertical bar fixing portion, extending in the longitudinal direction thereof, and having an arm portion formed with both end obstruction slits in which both ends in the longitudinal direction are closed, and the arm portion. It is provided with a formwork support member that is slidably fitted to both end closure slits and supports a floating formwork. The formwork support member has a formwork support member, and the formwork support member is provided with a formwork contact surface that floats on the upper end portion and comes into contact with the formwork. A long holding piece and a short holding piece having different lengths in the vertical direction are provided so as to form an upper arm insertion groove into which the upper arm is inserted and sandwiched so as to straddle the upper arm. However, the long holding piece is provided with a lateral projecting fitting portion to be inserted from the side into the both end closing slits, and the lateral projecting fitting portion is inserted into the both end closing slits. The lower end of the long holding piece reaches at least the lower arm portion, while the lower end portion of the short holding piece reaches the upper arm portion and does not reach the both end obstruction slits. Therefore, a space portion is formed so as to be separated from the ceiling surface of the upper arm portion insertion groove portion and the upper side surface of the upper arm portion.
Further, in the floating formwork support according to the present invention, the vertical straight line downward from the center of the formwork contact surface of the formwork support portion is on the long holding piece side of the center of the formwork support member. It is also characterized by being located in.
Further, in the support for a floating formwork according to the present invention, a chamfered portion whose corner portion is chamfered on the upper side surface facing the lower side surface of the upper arm portion in the laterally protruding insertion portion of the long holding piece. It is also characterized by being provided with.

In the floating formwork support according to the present invention, a space is provided between the ceiling surface of the upper arm insertion groove and the upper side surface of the upper arm, and the arm of the formwork support arm is provided. The formwork support member is mounted by inserting the laterally projecting fitting portion of the formwork support member from the side into the both end closure slits provided in the above.
Therefore, the horizontal force generated from the formwork support member can be brought closer to the axis of the formwork support (= the axis in the longitudinal direction of the fixed portion of the formwork support), and the support force of the formwork support can be increased. It can be suppressed from decreasing.
Further, since the side protruding fitting portion of the formwork support member is inserted and mounted in the both end closing slits, the upper side surface and the lower side surface of the side protruding fitting portion are on the ceiling surface and the bottom surface of the both end closing slits, respectively. Since it is abutted and supported, it also prevents the formwork support member from rotating even when a horizontal force is generated on the formwork contact surface of the formwork support member during lateral pressure during concrete filling or when the formwork is attached. The formwork support member can be made difficult to come off from the frame support arm, and the frame support member can be reliably supported.

It is a front view which shows the use state of the support for a floating formwork of embodiment which concerns on this invention. It is a perspective view which shows the state which fixed the support for a floating formwork of this embodiment to a vertical streak. (A) to (c) are a plan view, a front view, and a rear view showing a state in which a fastening bolt is screwed into a formwork support arm constituting the floating formwork support tool of the present embodiment, respectively. (A) and (b) are a right-side view and a left-side view showing a state in which a fastening bolt is screwed into a formwork support arm constituting the floating formwork support tool of the present embodiment, respectively. (A) and (b) are perspective views of the formwork support member constituting the floating formwork support tool of this embodiment, respectively. (A) and (b) are the back surface (side surface on one side of a long holding) view of the formwork support member constituting the floating formwork support tool of the present embodiment, and the cross-sectional view taken along the line AA. It is explanatory drawing which shows the procedure when the formwork support member is attached to the formwork support arm which constitutes the floating formwork support tool of this embodiment, respectively (a) to (c). (A), (b) An enlarged cross section of a main part showing a state in which a laterally projecting fitting portion of a formwork support member is inserted into a formwork support arm constituting the floating formwork support tool of the present embodiment, respectively. The figure is an enlarged front view of a main part. It is explanatory drawing which shows the rotational moment which acts on the formwork support arm when a load is applied to the formwork support member of the floating formwork support tool of this embodiment.

Hereinafter, embodiments of the floating formwork support according to the present invention will be described. The embodiments described below are merely examples of the present invention, and the present invention is not limited to the following embodiments, and can be appropriately modified within the scope of creation of the technical idea of the present invention.

<Structure of support 1 for floating formwork of embodiment>
The floating formwork support 1 of the embodiment is fixed to the vertical line 2 to support the floating formwork 3, as shown in FIG. 1, and is fixed to the vertical line 2 as shown in FIG. It is composed of a formwork support arm 11 to be slidably attached to the formwork support arm 11, a formwork support member 12 slidably attached to support the floating formwork 3, a fastening bolt 13, and the like. In addition, in FIG. 1, the floating formwork 3 is composed of plywood 3b to which a crosspiece 3a or the like is fixed, and the lower surface of the crosspiece 3a abuts on the upper end of the formwork support member 12 and is supported.

(Formwork support arm 11)
As shown in FIGS. 3 and 4, the formwork support arm 11 is made of a flat steel plate having a thickness of W1 (see FIG. 3A), and is substantially 5 so that one end side can be fixed to the vertical bar 2. It is provided with a vertical bar fixing portion 11a that is bent into a square shape and fixed to the vertical bar 2 by fastening a tightening bolt 13, and a long arm portion 11b extending from the other end of the vertical bar fixing portion 11a. It is composed of.

As shown in FIGS. 3A to 3C, the vertical bar fixing portion 11a is bent into a substantially pentagonal shape so that it can be fixed to the vertical bar 2, and the first bent portion 11a1 to the fourth bent portion 11a1 to 4 are bent. The outer peripheral surface of the reinforcing bar 2 between the tip of the fastening bolt 13 forming the portion 11a4 and screwing into the female screw hole formed in the fourth bent portion 11a4, the first bent portion 11a1 and the second bent portion 11a2. Is configured to be pressed and pinched to be fixed to the reinforcing bar 2.

Here, in the vertical bar fixing portion 11a, as shown in FIG. 3A, the fourth bent portion 11a4 is bent at an angle of 90 degrees with respect to the third bent portion 11a3, and the fourth bent portion 11a4 is bent. The axis a of the fastening bolt 13 screwed into the female screw hole of No. 1 is configured to pass through a bending point (bending boundary line) between the first bending portion 11a1 and the second bending portion 11a2. There is.

Further, the vertical bar fixing portion 11a is formed with an extruded reinforcing portion 11a5 whose central portion is extruded from the inside to the outside over the first bent portion 11a1 to the fourth bent portion 11a4 so as to improve the strength. The shape of the vertical bar fixing portion 11a in a plan view is not limited to a substantially pentagonal shape, and a substantially triangular shape or a curved shape is sufficient if it can be fixed to the reinforcing bar 2.

The arm portion 11b is a long portion extending from the other end of the vertical streak fixing portion 11a, that is, the fourth bent portion 11a4, and is a long portion extending from the fourth bent portion 11a4. An elongated hole-shaped closed end slit 11b1 having a width in the vertical direction of h1 and extending in the longitudinal direction thereof is formed. The upper side of the both end closing slits 11b1 is referred to as an upper arm portion 11b2, and the lower side of the both end closing slits 11b1 is referred to as a lower arm portion 11b3. The width from the upper end of the arm portion 11b to the upper end of the both end closing slits 11b1 is defined as h2.

(Formwork support member 12)
The formwork support member 12 is formed of a synthetic resin, a metal member, or the like, and as shown in FIGS. 1 and 2, is slidably inserted into both end closing slits 11b1 of the arm portion 11b of the formwork support arm 11 and floats. It supports the formwork 3, and as shown in FIGS. 5 and 6, it is provided below the formwork support portion 12a and the formwork support portion 12a, and the upper arm portion 11b2 of the arm portion 11b is inserted. The upper arm portion insertion groove portion 12b is formed, and the long holding piece 12c and the short holding piece 12d that are sandwiched so as to straddle the upper arm portion 11b2 are provided.

As shown in FIG. 1, the formwork supporting portion 12a is a portion that supports the floating formwork 3 by abutting the formwork contact surface 12a1 at the upper end against the lower surface of the crosspiece 3a or the plywood 3b constituting the floating formwork 3. As is clear from FIGS. 5 (a) and 5 (b) and FIG. 6 (b), the trapezoid is formed with the side view and the formwork contact surface 12a1 as the upper bottom.

However, as shown in FIG. 9, which will be described later, in the formwork support portion 12a, the vertical straight line VL1 downward from the center of the formwork contact surface 12a1 in the width direction is the center of the formwork support member 12 in the width direction, and The formwork support member 12 is fitted and is formed so as to be located on the long holding piece 12c side of the center of the formwork support arm 11 in the width direction.

Therefore, as shown in FIG. 9, the trapezoid having the formwork contact surface 12a1 as the upper base in the side view of the formwork support portion 12a is from the center of the lower bottom of the trapezoid and the formwork contact surface 12a1 in the width direction. When the intersection with the downward vertical straight line VL1 is the center, the length a from the intersection to the outer surface of the long holding piece 12c is smaller than the length b from the same intersection to the outer surface of the short holding piece 12d. That is, it is formed in a shape such that a <b.

The upper arm insertion groove portion 12b is a groove into which the upper arm portion 11b2 of the arm portion 11b is inserted, and is formed between the inner side surface of the long holding piece 12c and the short holding piece 12d below the formwork support portion 12a. The width W1 is the same as the thickness W2 (see FIG. 9) of the arm portion 11b of the formwork support arm 11.

Further, the height h3 of the upper arm portion insertion groove portion 12b is the height h2 of the upper arm portion 11b2 of the formwork support arm 11 (FIG. 3 (b)) as shown in FIGS. 8 (a) and 9 (9) and the like described later. ), Which is larger than () and is formed in h3> h2, and when the upper arm portion 11b2 is inserted into the upper arm portion insertion groove portion 12b, the upper arm portion is shown in FIGS. 8 (a) and 9 to be described later. The ceiling surface 12b1 of the insertion groove portion 12b and the upper side surface 11b22 of the upper arm portion 11b2 are separated from each other so that a space portion is formed.

The long holding piece 12c projects toward the short holding piece 12d side, and is provided with a laterally protruding insertion portion 12c1 that is inserted from the side into the both end closing slits 11b1 of the arm portion 11b. The long holding piece 12c has a lower end portion 12c2 of the long holding piece 12c, as shown in FIGS. Is extended until it reaches at least the lower arm portion 11b3.

Here, the height h4 of the laterally projecting fitting portion 12c1 (see FIG. 6B) is the same as the vertical height h1 of the both end closing slits 11b1 (see FIG. 3B). As shown in FIGS. 8A and 9 described later, the upper side surface 12c11 and the lower side surface 12c12 of the laterally projecting fitting portion 12c1 form the lower side surface 11b21 and the lower side surface 11b21 of the upper arm portion 11b2 forming the both end closing slits 11b1, respectively. It is inserted so as to be in close contact with the upper side surface 11b31 of the lower arm portion 11b3.

Further, the lateral projecting fitting portion 12c1 chamfered the corner portion of the upper side surface 12c11 facing the lower side surface 11b21 of the upper arm portion 11b2 in order to facilitate the fitting into the both end closing slits 11b1 of the form support arm 11. A chamfered portion 12c13 is provided.

In the short holding piece 12d, as shown in FIGS. 7 (c), 8 (a), 9 and the like described later, the laterally projecting fitting portion 12c1 of the long holding piece 12c is inserted into the both ends closing slit 11b1. In the state, the lower end portion 12d1 of the short holding piece 12d reaches the upper arm portion 11b2 of the form support arm 11, but is formed to have a length that does not reach the both end closing slits 11b1 and the lower arm portion 11b3. There is.

<How to attach the floating formwork support 1 of the embodiment>
Next, a method of mounting the formwork support member 12 on the formwork support arm 11 in the floating formwork support tool 1 of the embodiment as described above will be described with reference to FIG. 7.

First, as shown in FIG. 7A, the chamfered portion 12c13 formed on the upper side surface of the laterally projecting fitting portion 12c1 of the long holding piece 12c is attached to the side surface of the upper arm portion 11b2 of the formwork supporting arm 11. While tilting the formwork support member 12 with respect to the formwork support arm 11 in the abutting state, bring the upper arm portion 11b2 of the formwork support arm 11 closer from below on the short holding piece 12d side of the formwork support member 12. , The upper arm portion 11b2 of the formwork support arm 11 is inserted into the upper arm portion insertion groove portion 12b of the formwork support member 12.

Then, as shown in FIG. 7B, the formwork support member 12 is raised counterclockwise so as to move the chamfered portion 12c13 of the laterally protruding insertion portion 12c1 toward the both side closing slits 11b1. The upper arm portion 11b2 is inserted into the upper arm portion insertion groove portion 12b.

At that time, since the chamfered portion 12c13 is formed on the upper surface of the laterally projecting insertion portion 12c1 of the long holding piece 12c, the upper arm portion 11b2 of the formwork support arm 11 is on the upper side of the formwork support member 12. The arm portion insertion groove portion 12b can be easily inserted, and the laterally projecting fitting portion 12c1 can be easily inserted into the both end closing slits 11b1 of the arm portion 11b from the side, so that the work efficiency can be improved.

Then, as shown in FIG. 7 (c), the laterally projecting fitting portion 12c1 of the long holding piece 12c is inserted into the both end closing slits 11b1 of the arm portion 11b, and the formwork support member 12 is inserted into the formwork support arm 11. Will be able to be installed.

The upper side surface 12c11 and the lower side surface 12c12 of the side projecting fitting portion 12c1 of the formwork support member 12 form the lower side surface 11b21 and the lower side surface portion 11b2 of the upper side arm portion 11b2 constituting the both end closing slits 11b1 of the formwork support arm 11, respectively. Since it is in close contact with the upper side surface 11b31 of 11b3, even when a horizontal force is generated on the formwork contact surface 12a1 of the formwork support member 12 during lateral pressure during concrete filling or when the formwork is attached, the formwork support member Since the rotation of the formwork 12 is prevented, the formwork support member 12 can be made difficult to come off from the formwork support arm 11 at this point as well, and the formwork support member 12 can be reliably supported.

Further, a space portion is provided between the ceiling side of the upper arm portion insertion groove portion 12b and the upper side surface of the upper arm portion 11b2, and the lateral projecting insertion portion 12c1 of the formwork support member 12 is provided in the both end closing slits 11b1. Since it is inserted and mounted, a horizontal force is generated on the laterally projecting fitting portion 12c1 of the formwork support member 12, and the position of this horizontal force is lifted in the longitudinal direction of the arm portion 11b of the formwork support member 1. It becomes close to the axis, and it is possible to suppress a decrease in the supporting force of the floating formwork support 1.

Then, after the formwork support member 12 is attached to the formwork support arm 11, the formwork support member 12 receives a load N such as a floating formwork 3 or concrete filled in the floating formwork 3 as shown in FIG. If so, the load N is applied to the formwork support member 12 and the formwork support arm 11 along the vertical line VL1 downward from the center of the formwork contact surface 12a1 in the width direction, as shown in FIG. Be transmitted.

Here, in the floating formwork support 1 of the present embodiment, the side view of the formwork support portion 12a and the trapezoid having the formwork contact surface 12a1 as the upper bottom are the centers in the width direction of the formwork contact surface 12a1. The length a from the intersection to the outer surface of the long holding piece 12c centered on the intersection of the vertical straight line VL1 descending from the bottom of the trapezoid is larger than the length b from the intersection to the outer surface of the short holding piece 12d. It is formed in a small shape, that is, a <b, and the vertical line VL1 is longer than the vertical line VL2 downward from the center of the arm portion 11b of the formwork support arm 11. It is eccentric to the 12c side of the formwork holding piece.

Therefore, assuming that the eccentric distance between the vertical straight line VL1 and the vertical straight line VL2 is e, the formwork support member 12 of the floating formwork support 1 of the present embodiment is a floating formwork 3 or a floating formwork as shown in FIG. When a load N such as concrete filled in 3 is applied, a counterclockwise rotation moment Mb = N · e acts on the formwork support arm 11 and the formwork support member 12.

As a result, as shown in FIG. 9, a horizontal force Ph acts on the formwork support member 12 from the long holding piece 12c side toward the short holding piece 12d side, and the formwork support member 12 is inserted laterally. Even if the portion 12c1 tries to come off from the both ends closing slit 11b1 of the arm portion 11b, the counterclockwise rotation moment Mb = N · e opposes, so that the laterally projecting fitting portion 12c1 of the formwork support member 12 is the arm portion 11b. The formwork support member 12 can reliably receive the load N of the formwork 3 and the concrete filled in the floating formwork 3 by preventing the formwork support member 12 from coming off from the both end closing slits 11b1.

<Summary of support 1 for floating formwork of the embodiment>
As described above, the floating formwork support tool 1 of the embodiment according to the present invention is not the upper side surface of the formwork support arm 11, but both ends closing slits provided in the arm portion 11b of the formwork support arm 11. In a state where the side protruding fitting portion 12c1 of the formwork support member 12 is inserted into 11b1 and the side protruding fitting portion 12c1 is inserted into the both end closing slits 11b1, the lower end portion of the long holding piece 12c. While 12c2 extends at least until it reaches the lower arm portion 11b3, the short holding piece 12d is formed to a length in which the lower end portion 12d1 reaches the upper arm portion 11b2 and does not reach the both end obstruction slits 11b1. In the formwork support arm 11, both ends are closed slits 11b1 so that a space is formed so as to be separated from the ceiling surface 12b1 of the upper arm insertion groove 12b and the upper side surface 11b22 of the upper arm 11b2. The side protruding fitting portion 12c1 is inserted, and the formwork support member 12 is mounted on the formwork support arm 11.

Therefore, in the formwork support member 12, the side protruding fitting portion 12c1 of the formwork support member 12 is inserted into the both end blockage slits 11b1 provided on the arm portion 12b of the formwork support arm 11 in which both ends in the longitudinal direction are closed. Since it is fitted and mounted, even if a horizontal force acts on the formwork support member 12, the formwork support member 12 can be made difficult to come off from the formwork support arm 11, and the formwork support member 12 is reliably supported. In addition, the formwork support member 12 can be easily attached to the formwork support arm 11.

In particular, since the side protruding fitting portion 12c1 of the formwork support member 12 is inserted and mounted in the both end closing slits 11b1, the upper side surface 12c11 and the lower side surface 12c12 of the side protruding fitting portion 12c1 support the formwork, respectively. It is supported by abutting against the lower side surface 11b21 of the upper arm portion 11b2 and the upper side surface 11b31 of the lower arm portion 11b3 constituting the both end closing slits 11b1 of the arm 11, and is supported by the side pressure during concrete filling and when the formwork is attached. Even when a horizontal force is generated on the formwork contact surface 12a of the support member 12, the formwork support member 12 is prevented from rotating, so that the formwork support member 12 cannot be easily removed from the formwork support arm 11. The frame support member 12 can be reliably supported.

Further, since the laterally projecting fitting portion 12c1 of the formwork support member 12 is inserted and mounted in the both end closing slits 11b1, the horizontal force generated in the formwork support member 12 is floated and the axial center of the formwork supporter 1 is floated. (= The axis in the longitudinal direction of the fixed portion 11a) can be approached, and it is possible to suppress a decrease in the bearing capacity of the floating formwork support 1.

Further, in the floating formwork support 1 according to the present invention, the vertical line VL1 downward from the center of the formwork contact surface 12a1 of the formwork support member 12 is the arm of the formwork support arm 11. It is eccentric to the long holding piece 12c side with respect to the vertical straight line VL2 which is downward from the center of the portion 11b.

Therefore, as shown in FIG. 9, a horizontal force Ph acts on the formwork support member 12 from the long holding piece 12c side toward the short holding piece 12d side, and the laterally projecting insertion portion of the formwork support member 12 is inserted. Even if the 12c1 tries to come off from the both ends closing slit 11b1 of the arm portion 11b, it is countered by the counterclockwise rotation moment Mb = N. It is possible to prevent the formwork support member 12 from coming off the both ends closing slit 11b1 and reliably receive the load N of the formwork 3 and the concrete filled in the floating formwork 3.

Further, in the floating formwork support 1 of the embodiment according to the present invention, the angle of the upper side surface of the long holding piece 12c facing the lower side surface 11b21 of the upper arm portion 11b2 in the laterally protruding insertion portion 12c1. A chamfered portion 12c13 is provided.

Therefore, the laterally projecting fitting portion 12c1 of the long holding piece 12c can be easily inserted into the both end closing slits 11b1 of the arm portion 11b from the side, and the work efficiency can be improved in this respect as well.

1 ... Floating formwork support, 11 ... Formwork support arm, 11a ... Vertical streak fixing part, 11a1 to 11a4 ... 1st bent part 11a1 to 4th bent part 11a4, 11b ... Arm part, 11b1 ... Both ends Closing slit, 11b2 ... upper arm, 11b3 ... lower arm, 12 ... formwork support member, 12a ... formwork support, 12a1 ... formwork contact surface, 12b ... upper arm insertion groove, 12c ... long Holding piece, 12c1 ... Lateral protruding fitting part, 12c11 ... Upper side surface, 12c12 ... Lower side surface, 12c13 ... Chamfered part, 12d ... Short holding piece, 13 ... Fastening bolt, 3 ... Floating formwork, 3a ... Cross, 3b ... plywood.

Claims (3)

One end side is bent so that it can be attached to the vertical bar, and it extends from the other end of the vertical bar fixing part that is fixed to the vertical bar by fastening the tightening bolt and the vertical bar fixing part, and extends in the longitudinal direction. A formwork support arm provided with an arm having a slit for blocking both ends in the longitudinal direction, and an arm for supporting the formwork.
It is provided with a formwork support member that is slidably fitted to both end closure slits of the arm portion and supports the floating formwork.
The arm portion has an upper arm portion on the upper side of the both end obstruction slit and a lower arm portion on the lower side of the end obstruction slit.
The formwork support member is
A formwork contact surface that floats and comes into contact with the formwork is provided at the upper end, and a formwork support part that supports the formwork and a formwork support part.
A long sandwiching portion provided on the lower side of the mold support portion, forming an upper arm portion insertion groove portion into which the upper arm portion is inserted, and sandwiching the upper arm portion so as to straddle the upper arm portion and having different lengths in the vertical direction. It has a piece and a short holding piece,
The long holding piece is provided with a laterally projecting fitting portion to be inserted from the side into the both end closing slits, and the laterally protruding fitting portion is inserted into the both end closing slits. The lower end of the long holding piece reaches at least the lower arm, while the short holding piece has a length such that the lower end reaches the upper arm and does not reach the both end occlusion slits. , A support for a floating mold, characterized in that a space portion is formed so as to be separated from the ceiling surface of the upper arm portion insertion groove portion and the upper side surface of the upper arm portion. In the support for floating formwork according to claim 1,
A support for a floating formwork, characterized in that a vertical straight line downward from the center of the formwork contact surface of the formwork support portion is located on one side of the long holding member with respect to the center of the formwork support member. .. In the floating formwork support according to claim 1 or 2.
For a floating formwork, the upper side surface of the laterally projecting fitting portion of the long holding piece facing the lower side surface of the upper arm portion is provided with a chamfered portion having a chamfered corner portion thereof. Support.

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