JP2023123184A - Form support member and form set - Google Patents

Abstract

To provide a form support member and a form set that can be installed at low cost and with excellent workability.SOLUTION: A form support member 11 holds intermediate forms 26 constituting a rise part 16 of a mat foundation. The form support member 11 comprises: a plurality of engagement parts 44 engaging with two auxiliary reinforcement bars 20b of slab reinforcement bars 20 arranged in a pressure slab part 14, respectively; a first beam part 48 connecting the pair of the engagement parts 44; and a form receiving part 52 supported on the first beam part 48 at a low cost and with excellent workablity to support a lower surface of the intermediate forms 26. The form support member 11 has a lower structural body 40 and an upper structural body 42. The upper structural body 42 is positioned at a height corresponding to the first beam part 48 based on a mating position of an adjustment nut 60, and is allowed to be separated from the lower structural body 40 by pulling out a height adjustment screw 56 from a screw hole 48a.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a formwork support member for holding a formwork forming a raised portion of a slab foundation, and a formwork set including the formwork support member.

The slab foundation has a pressure-resistant board portion and a rising portion. Slab reinforcing bars arranged vertically and horizontally are arranged in the pressure-resistant board. The rising portion has an outer peripheral portion and a central portion. In the method of constructing the pressure plate and rising portion of the slab foundation by pouring concrete once, it is necessary to throw away the formwork that constitutes the middle passage portion and place it in a state of floating from the upper surface of the base such as concrete. Basically the same applies to the inner surface side formwork in the outer peripheral portion.

For this reason, the conventionally used formwork supporting member has a mounting table to be placed on the base and a formwork receiving portion for supporting the lower surface of the formwork. are connected by struts (see, for example, Patent Document 1). The struts connect the mounting table and the formwork receiver through the squares formed by the slab reinforcement, and the formwork can be placed above the slab reinforcement by a specified height. Become.

Japanese Utility Model Publication No. 63-7649

By the way, the rooting depth of the foundation is not formed uniformly, and a deep excavation is sometimes provided in part to secure seismic strength and prevent frost heaving. Formwork support members applied to deep excavations require longer pillars than those applied to shallow locations, and the structure itself needs to be changed in order to achieve stability, making common use difficult and costly. . The formwork support member is not basically responsible for the strength of the foundation, and it is sufficient to support the formwork only when concrete is poured, and it is desirable that the cost be low. In addition, slab reinforcement is added to the deep excavation, and it is not easy to install formwork support members at the bottom of the deep excavation. Furthermore, it is not always easy to install the formwork support member on the base under the slab reinforcement after the slab reinforcement is installed even in the shallow part, and it is a burden on the operator.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a form support member and a form set which are low in cost and excellent in installation workability.

In order to solve the above-described problems and achieve the object, a formwork support member according to the present invention is a formwork support member for holding a formwork that constitutes a rising portion of a slab foundation, and a pair of engaging portions that respectively engage with two parallel slab reinforcements arranged in a board portion; a first beam portion that connects the pair of engaging portions; and a form receiving part that is supported and supports the lower surface of the form.

Further, the formwork set according to the present invention includes the formwork and two slab reinforcements, and a plurality of the formwork support members are provided for the two slab reinforcements. characterized by

Since the present invention is constructed such that the formwork support member is engaged with the slab reinforcement rather than the base portion, it is applicable regardless of whether or not there is a deep dug portion, is low cost, and is excellent in installation workability.

1 is a schematic exploded perspective view of a mold set according to an embodiment of the present invention; FIG. It is a cross-sectional side view of a formwork set. FIG. 4 is a plan view showing part of the formwork set in the process of being assembled; FIG. 4 is a schematic plan view of a foundation that is placed and formed by a formwork set; FIG. 2 is a perspective view of a form support member; FIG. 4 is an exploded side view of the form support member; FIG. 4 is a schematic plan view showing how the lower structure of the form support member is attached to the auxiliary reinforcement. It is a cross-sectional side view of a form support member and its surroundings when auxiliary reinforcements are arranged on upper reinforcements. It is a cross-sectional side view of the form support member and its surroundings in a state in which the slab reinforcing bars are bent.

EMBODIMENT OF THE INVENTION Below, embodiment of the formwork support member and formwork set concerning this invention is described in detail based on drawing. In addition, this invention is not limited by this embodiment.

FIG. 1 is a schematic exploded perspective view of a mold set 10 according to an embodiment of the present invention. The formwork set 10 includes a formwork support member 11 according to an embodiment of the invention. FIG. 2 is a cross-sectional side view of the mold set 10. As shown in FIG. FIG. 3 is a plan view showing a portion of the formwork set 10 during assembly. FIG. 4 is a schematic plan view of the foundation 12 cast and formed by the formwork set 10. FIG. The formwork set 10 and the formwork support member 11 according to the present embodiment are used for construction of the foundation 12 .

First, the foundation 12 will be explained.
As shown in FIG. 4, the foundation 12 is a flat foundation, and has a pressure-resistant board portion 14 that spreads in a plane and a wall-like rising portion 16 that rises vertically. The rising portion 16 is divided into an outer peripheral portion 16a along the edge of the pressure-resistant board portion 14, and a central passage portion 16b provided on the pressure-resistant board portion 14 in a range surrounded by the outer peripheral portion 16a. The middle section 16b is also called a partition. The intermediate portion 16b may be discontinuously formed to form the through hole 18. As shown in FIG. In FIG. 4, one through the through hole 18 is denoted by 16ba, and the other is denoted by 16bb.

Next, the mold set 10 will be described.
As shown in FIGS. 1, 2, and 3, the formwork set 10 includes a plurality of formwork support members 11, a slab reinforcement 20 arranged in a plane, and a riser part of which protrudes upward. It has a reinforcement arrangement 22 , an outer surface side formwork 24 a , an inner surface side formwork 24b , and a pair of intermediate formwork forms 26 . Each mold may be provided with a frame member for reinforcement. Each mold may be a single piece corresponding to the length of the rising portion 16, or a predetermined number of divided molds may be connected. The slab bar arrangement 20 is arranged inside the pressure-resistant board portion 14 . The slab bar arrangement 20 is divided into a main bar arrangement 20a arranged in a grid pattern at predetermined intervals and an auxiliary bar arrangement 20b provided in addition to the main bar arrangement 20a.

The main bar arrangement 20a is arranged vertically and horizontally in the shape of a grid. In FIG. 1, of the main reinforcements 20a, the one extending in the horizontal direction is the lower side, and the one extending in the vertical direction is the upper side. In the following description, the lower bar is called the lower bar 20aa, and the upper bar is called the upper bar 20ab. The auxiliary bar arrangement 20b in this embodiment is provided as a set of two parallel bars at a predetermined interval. In the example of FIG. 1, the auxiliary bar arrangement 20b is placed on the lower bar arrangement 20aa and is parallel to the upper bar arrangement 20ab. The slab reinforcement 20 is supported by blocks 28 (see FIG. 2) arranged at appropriate intervals. Block 28 rests on base 30 . Although the foundation 30 is basically sanitary concrete, the sanitary concrete may be omitted if the condition of the site is good. A moisture-proof sheet may be attached to the base 30 .

The rising bar arrangement 22 has a horizontal portion 22a arranged horizontally along the slab bar arrangement 20, and a vertical portion 22b bent and protruding upward from the horizontal portion 22a. The vertical portion 22 b is disposed within the rising portion 16 , and a plurality of vertical portions 22 b are provided along the rising portion 16 . In FIG. 1, the rising bar arrangement 22 and the like are omitted for simplification. Corner reinforcements 32, which are L-shaped in a plan view, are provided at the corners where the center-street portions 16b intersect in a T-shape to ensure strength. The corner reinforcement 32 is provided on the vertical portion 22b via the extension 29 (see FIG. 2). The plurality of rising bar arrangements 22 are supported by supporting bar arrangements 33, respectively. Each reinforcement basically has the same diameter (for example, about 13 mm), but different diameters may be used depending on the conditions. Each reinforcing bar is, for example, a reinforcing bar.

The outer surface side formwork 24a forms a mold on the outer peripheral side of the outer peripheral portion 16a. Although illustration is omitted, the outer surface side formwork 24a is fixed to the foundation or the ground by a support member so as not to incline to the outer peripheral side. A plurality of inner mold support members 34 projecting inward are provided on the outer mold 24a. The inner mold frame 24b faces the outer mold frame 24a and forms an inner mold for the outer peripheral portion 16a. The lower surface of the inner formwork 24b is supported by an inner formwork support member 34, and is in a floating state according to the height of the slab to be placed.

A pair of intermediate mold frames 26 face each other and form molds on both sides of the intermediate portion 16b. One end of the pair of intermediate formwork 26, that is, one end that is interrupted for forming the through hole 18, is closed by an end plate 36 (see FIG. 1). The other ends of the pair of intermediate formwork 26 are connected to the inner surface side formwork 24b.

Next, the form support member 11 will be described. FIG. 5 is a perspective view of the form support member 11. FIG. FIG. 6 is an exploded side view of the form support member 11. FIG.
As shown in FIGS. 5 and 6, the form support member 11 in this embodiment has a symmetrical structure. The form support member 11 can be separated into a lower construction 40 and an upper construction 42 . The lower structure 40 has a pair of engaging portions 44 that engage with the auxiliary bar arrangement 20b, and first beam portions 48 that connect the pair of engaging portions 44 via raising pieces 46 at both ends. The width of the lower structure 40 in the depth direction in FIG. 6 is the same as or slightly longer than the diameter of the auxiliary bar arrangement 20b.

The engaging portion 44 includes a side wall portion 44a arranged on the side of the auxiliary bar arrangement 20b, an upper fin portion 44b protruding outward from the side wall portion 44a and arranged above the auxiliary bar arrangement 20b, and the side wall portion 44a. It has a lower fin portion 44c that protrudes outward and is arranged below the auxiliary bar arrangement 20b. The upper fin portion 44b and the lower fin portion 44c of the pair of engaging portions 44 protrude in opposite directions, that is, in directions away from each other.

The engaging portion 44 is engaged with the auxiliary reinforcement 20b so that the lower structure 40 cannot move in the vertical direction and in the direction perpendicular to the extending direction of the auxiliary reinforcement 20b (that is, the horizontal direction in FIGS. 2 and 6). The extension direction of the auxiliary bar arrangement 20b is not constrained. Specifically, the upper fin portion 44b and the lower fin portion 44c are made immovable in the vertical direction, and the side wall portion 44a is made immovable in the horizontal direction in FIG.

The side wall portion 44 a serves as a downward extension of the raised piece 46 . The pair of side wall portions 44a are spaced so as to abut against the opposing surfaces of the pair of auxiliary reinforcements 20b. Conversely, the spacing between the pair of auxiliary reinforcements 20b is set so that each of them contacts the side wall portion 44a. The side wall portion 44a is a vertical wall, but may be slightly inclined. The upper fin portion 44b protrudes longer than the lower fin portion 44c. Specifically, the projection length of the upper fin portion 44b is slightly longer than the diameter of the auxiliary reinforcement arrangement 20b, and the projection length of the lower fin portion 44c is shorter than the diameter of the auxiliary reinforcement arrangement 20b and longer than the radius. ing. The first beam portion 48 is held at a position slightly higher than the engaging portion 44 by the raising piece 46 . Screw holes 48 a are formed in the vicinity of both ends of the first beam portion 48 .

The lower structure 40 has a main portion (a first beam portion 48, a pair of upper fin portions 44b, and a pair of raised pieces 46) formed by bending a metal plate, for example, and a raised piece 46, a side wall portion 44a and a lower portion. It is formed by joining a pair of L-shaped auxiliary sheet metals 49 each having a fin portion 44c. In other words, two sheet metals are joined at the raised piece 46 . The lower structure 40 may be made of resin.

The upper structure 42 includes a pair of formwork receiving portions 52 that support the lower surface of the middle-street formwork 26, a second beam portion 54 that connects the pair of formwork receiving portions 52, and downward from the second beam portion 54. It has a pair of height adjustment screws 56 that protrude. The second beam portion 54 and the frame receiving portion 52 are integrally formed by bending a metal plate, but may be formed of resin. The width of the second beam portion 54 and the mold receiving portion 52 in the depth direction in FIG.

The formwork receiving portion 52 includes an inner wall 52a projecting slightly downward from the end of the second beam portion 54, a bottom wall 52b projecting outward from the inner wall 52a, and an outer surface projecting upward from the bottom wall 52b. wall 52c. The outer wall 52c is higher than the inner wall 52a, which is about twice as high in this embodiment. A fixing hole 52ca is formed in the vicinity of the upper end of the outer wall 52c. The width of the bottom wall 52b in the left-right direction in FIG. 6 is slightly wider than that of the intermediate formwork 26 and the rails 64 attached thereto (see FIG. 2).

A pair of holes 54a are formed in the second beam portion 54 at spaced apart positions. A pair of height adjusting screws 56 are inserted through the holes 54a and protrude downward. An adjusting nut 60 is screwed onto the height adjusting screw 56 . The fixing nut 58 and the adjusting nut 60 are general-purpose products, and the same ones can be applied, but are given different names for easy understanding of their functions.

The pair of height adjusting screws 56 are spaced apart so as to be inserted through screw holes 48 a formed in the first beam portion 48 . The height of the second beam portion 54 is set by the contact of the adjusting nut 60 with the first beam portion 48 . The height of the second beam portion 54 can be adjusted by adjusting the screwing position of the adjustment nut 60 . The height adjusting screw 56 is appropriately long, and the second beam portion 54 can be set at a position higher than the lower structure 40 to some extent. Two height adjusting screws 56 are provided in the vicinity of both ends of the second beam portion 54 so as to easily support the first beam portion 48 and the second beam portion 54 in parallel. has a detent effect on the lower structure 40 of the .

The height adjusting screw 56 can be fixed by providing another nut on the portion of the height adjusting screw 56 below the first beam portion 48 and holding the second beam portion 54 between the adjusting nut 60. , in this embodiment, the height adjusting screw 56 is not fixed and is in an unrestrained state. That is, the upper component 42 can be freely displaced upward from the lower component 40 . However, the height adjusting screw 56 projects moderately downward from the first beam portion 48 so that it cannot be removed from the screw hole 48a unless it is pulled considerably upward.

A cylindrical spacer 62 is inserted through the height adjusting screw 56 . A spacer 62 is provided between the adjusting nut 60 and the first beam portion 48 . The height of the spacer 62 is about the same as the diameter of the auxiliary bar arrangement 20b. The spacer 62 is not limited to a cylindrical body, and may be, for example, a columnar body having a C-shaped cross section that can elastically widen the opening width. Such a column can be attached and detached from the side of the height adjusting screw 56 .

Next, a method of using the formwork support member 11 in the formwork set 10 will be described. FIG. 7 is a schematic plan view showing how the lower structural body 40 of the form support member 11 is attached to the auxiliary bar arrangement 20b. At this point, it is assumed that the main reinforcement 20a is assembled in a grid pattern, and two auxiliary reinforcements 20b are installed on the lower reinforcement 20aa in parallel with the upper reinforcement 20ab at a predetermined interval. It is assumed that the rising bar arrangement 22 and the like have already been installed.

As shown in FIG. 7, first, the lower structural body 40 is obliquely inserted so as to enter the grid formed by the main reinforcing bars 20a and the auxiliary reinforcing bars 20b. At this time, the upper structural body 42 is pulled out so that it does not interfere with the surrounding standing bar arrangement 22 or the like. Further, the lower structure 40 is rotated as indicated by the arrow, and the first beam portion 48 is oriented perpendicular to the auxiliary bar arrangement 20b as indicated by the phantom line. As a result, the state shown in FIG. 3 is obtained, and the pair of engaging portions 44 are engaged with the auxiliary bar arrangement 20b. A plurality of lower structures 40 are installed at predetermined intervals. The upper fin portion 44b protrudes longer than the lower fin portion 44c, and even if the lower structure 40 is slightly tilted, the contact state between the upper fin portion 44b and the auxiliary bar arrangement 20b is maintained and does not fall off. .

As shown in FIG. 2 , the first beam portion 48 of the lower structure 40 is positioned slightly upward by the raising piece 46 , so that the first beam portion 48 does not interfere with the support arrangement 33 . Next, the upper component 42 is attached to the lower component 40 that is engaged with the auxiliary bar arrangement 20b at the engaging portion 44 . An adjusting nut 60 is screwed onto the height adjusting screw 56 of the upper structure 42, and a spacer 62 is inserted. The upper structure 42 is combined with the lower structure 40 by inserting the two height adjusting screws 56 into the screw holes 48a of the first beam portion 48, respectively.

At this time, the approximate screwing depth L of the adjustment nut 60 is set so that the height H from the base 30 to the bottom wall 52b of the mold receiving portion 52 is a predetermined slab height H. The height of the second beam portion 54 may be finely adjusted with the adjustment nut 60 after the upper structure 42 is assembled.

Then, the intermediate formwork 26 is arranged on the pair of formwork receiving parts 52 via the rails 64, and the screws 68 are screwed from the fixing holes 52ca to attach the rails 64 and the intermediate formwork 26 to the formwork receiving parts 52. fixed. Furthermore, the upper ends of the pair of intermediate formwork 26 are fixed by width stopper members 66 . Thus, the formwork set 10 is assembled. The rail 64 may be omitted depending on construction conditions.

FIG. 8 is a cross-sectional side view of the form support member 11 and its periphery when the auxiliary reinforcement 20b is arranged on the upper reinforcement 20ab. The center line portion 16b may be oriented vertically or horizontally (see FIG. 4), and the auxiliary bar arrangement 20b installed along the center line portion 16b may also be installed vertically or horizontally. Therefore, in the example shown in FIG. 2, the auxiliary reinforcement 20b is arranged above the lower reinforcement 20aa. may be placed.

In this case, it is preferable to assemble the upper structure 42 to the lower structure 40 by omitting the spacer 62 . Since the height of the spacer 62 is about the same as the diameter of the auxiliary bar arrangement 20b, the slab height H to the bottom wall 52b is maintained after all. That is, the height adjustment screw 56 is positioned at a constant screwing depth L regardless of whether the auxiliary reinforcement 20b is arranged on the lower reinforcement 20aa or the upper reinforcement 20ab. , it becomes possible to cope with the presence or absence of the spacer 62 .

In some cases, the base 30 is partially provided with a deep dug portion 70 . As mentioned above, this is to ensure seismic strength and prevent frost heaving. A general deep trench 70 consists of a bottom portion 70a and sloped haunches 70b formed on both sides of the bottom portion 70a. The deep dug portion 70 may be provided immediately below the intermediate passage portion 16b. The deep dug portion 70 is provided with a reinforcing bar 74 inclined along the haunch 70b, a plurality of reinforcing bars 74 extending along the middle passage portion 16b, and the like. Also, the vertical portion 22b of the rising bar arrangement 22 in this portion extends close to the bottom portion 70a and is further connected to the horizontal portion 22a via the inclined reinforcing bar 22c. Thus, the deep trench 70 is much deeper than the rest of the base 30 and has more obstacles such as reinforcing bars 72,74. Also, the width of the bottom portion 70a may be narrow.

In a place where such a deep dug portion 70 exists, it is difficult for the conventional formwork support member 11 to be installed on the bottom portion 70a, which is a burden on the operator. However, the cost of a sturdy structure for stabilization is high. On the other hand, since the formwork support member 11 according to the present embodiment is engaged with the auxiliary reinforcement arrangement 20b that is part of the slab reinforcement arrangement 20, it can be commonly applied regardless of the presence or absence of the deep dug portion 70. It has excellent installation workability and low cost. In addition, since the formwork support member 11 does not need to be lowered to the base 30 below the slab bar arrangement 20 and installed as in the conventional art, the installation workability is improved even in a place where the deep dug portion 70 does not exist. Excellent for

FIG. 9 is a cross-sectional side view of the form support member 11 and its surroundings in a state in which the slab reinforcement 20 is bent. The slab reinforcement 20 may be loaded with heavy objects (persons, machines, etc.) for work, and the weight of the slab reinforcement may temporarily bend downward as shown in FIG. As a result, the lower structural body 40 and the auxiliary reinforcement 20b sink together with the main reinforcement 20a around the heavy object. However, since the upper component 42 of the formwork support member 11 is not constrained in the vertical direction with respect to the lower component 40 and is relatively displaceable, it is the lower part that sinks together with the auxiliary reinforcement 20b. There is only the structure 40 and the height of the upper structure 42 is maintained. Therefore, no excessive external force is applied to the intermediate formwork 26, and the form is properly maintained. Since the height adjusting screw 56 protrudes from the screw hole 48a with a suitable length, it does not come off from the screw hole 48a even if the lower structure 40 is slightly displaced downward. When the heavy object is removed, the lower structure 40 returns to its original height.

In placing concrete using the formwork set 10, since the intermediate formwork 26 is held at the slab height H, one-time pouring is possible. Concrete is poured from between the two hollow forms 26, and the pressure-resistant plate part 14 and the rising part 16 are cast integrally, so that cold joints do not occur between them.

Although a lifting force may act on the form support member 11 due to concrete placement, the lower fin 44c of the engaging portion 44 abuts against the lower surface of the auxiliary bar arrangement 20b to prevent lifting. The lower fin portion 44c is set shorter than the upper fin portion 44b as long as it is in contact with the auxiliary bar arrangement 20b in order to prevent the lower fin portion 44c from floating up. 2 may act on the formwork support member 11 due to the pouring of concrete, the upper fin 44b and the lower fin 44c of the pair of engaging portions 44 are arranged to move away from each other. Since it protrudes, the formwork support member 11 will not come off from the auxiliary bar arrangement 20b even if a force acts in either the left or right direction. These actions are based on the engagement of the engaging portion 44 with the auxiliary bar arrangement 20b at least in the vertical direction and the horizontal direction in FIG. Since the engaging portion 44 is not fixed in the extending direction of the auxiliary bar arrangement 20b, it can be displaced. Almost none. However, depending on the conditions, the engaging portion 44 may be configured to be immovable in the extending direction of the auxiliary bar arrangement 20b.

Although a lifting force may be applied to the intermediate formwork 26 by placing concrete, it is fixed to the formwork support member 11 by the screws 68, so that it is prevented from rising. In addition, the lift acting upward on the intermediate formwork 26 is a local force generated when the concrete flows from the rising portion 16 to the slab side. (including materials, anchors, etc.), the mass of concrete deposited on the first beam portion 48 and the second beam portion 54 during placement, and the mass of concrete adhered viscously to the inside of the form work downward. The frame 26 does not substantially float. However, depending on the construction conditions and the like, it is also possible to further provide lifting prevention means such as providing an arm member extending from the outside to hold down the upper surface of the passage formwork 26 .

When concrete is poured, an outward force may act on the intermediate formwork 26, but the outer wall 52c of the pair of formwork receivers 52 is set relatively long to support the outward force. can do. The inner wall 52a is set to be shorter than the outer wall 52c as long as it is in contact with the intermediate formwork 26 to prevent slippage. Since the inner surface wall 52a is set to be relatively short, it is easy to arrange the intermediate formwork 26 on the formwork receiving portion 52 .

As shown in FIG. 1 , the intermediate formwork 26 may be partitioned by the end plate 36 to form a discontinuous portion 80 , and a plurality of pieces may be provided via the discontinuous portion 80 . This discontinuity 80 corresponds to the through hole 18 (see FIG. 4). The two auxiliary reinforcements 20b are arranged across the discontinuous portion 80 in plan view. Therefore, the strength of the through hole 18 without the raised portion 16 can be reinforced.

Although the above formwork support member 11 is engaged with the pair of auxiliary reinforcements 20b, it may be engaged with the pair of main reinforcements 20a depending on the conditions. It may be engaged with the auxiliary reinforcement 20b of the book. Depending on construction conditions, the intermediate formwork 26 supported by the formwork support members 11 may be demolded after the concrete is placed, or may be left as it is. The pair of intermediate formwork 26 supported by the formwork support member 11 may not necessarily be the same, and may have different plate thicknesses, for example. In this case, the formwork receiving portions 52 at both ends should be formed in a shape corresponding to the plate thickness of the intermediate formwork 26 to be supported. Although the form support member 11 supports the pair of inner formwork 26, it may be used instead of the inner formwork support member 34 to support one inner formwork 24b. In this case, only one formwork receiving portion 52 is required at any position on the second beam portion 54 . Since two height adjusting screws 56 are provided on the formwork support member 11, there is an effect of preventing rotation of the upper structure 42 with respect to the lower structure 40, and horizontal adjustment is facilitated. Also, in the case where horizontal setting means is provided separately, the number of height adjusting screws 56 may be one.

It goes without saying that the present invention is not limited to the above-described embodiments, and can be freely modified without departing from the gist of the present invention.

A formwork support member according to the present invention is a formwork support member that holds a formwork that constitutes a rising portion of a slab foundation, and is a slab reinforcement arranged in a pressure plate section of the slab foundation. a pair of engaging portions that respectively engage with the two, a first beam portion that connects the pair of engaging portions, and a formwork support that is supported by the first beam portion and supports the lower surface of the formwork. and a part.

Since such a form support member is engaged with a part of the slab bar arrangement, it can be commonly applied regardless of whether or not there is a deep dug portion, and is excellent in installation workability and low in cost.

The formwork supporting member according to the present invention includes a lower structure including the engaging portion and the first beam portion, the formwork receiving portion, and a threaded hole formed in the first beam portion projecting downward. a height adjusting screw to be inserted therethrough; and an upper structure provided with an adjusting nut screwed onto the height adjusting screw, wherein the upper structure is aligned with the first beam portion according to the screwing position of the adjusting nut. and can be separated from the lower structure by pulling out the height adjustment screw from the screw hole. When the lower component and the upper component are separable in this way, when the lower component is engaged with the slab reinforcement, the upper component rises and does not interfere with the reinforcement.

In the formwork support member according to the invention, the upper formation may be unrestrained upwardly displaced from the lower formation. As a result, the height of the upper structure and formwork is maintained even if the slab reinforcement temporarily sinks when a heavy load is placed on it.

In the form support member according to the present invention, a spacer having a height corresponding to the diameter of the slab reinforcement arrangement may be arranged between the adjustment nut and the first beam portion.

In the formwork support member according to the present invention, the engaging portion includes a side wall portion arranged on the side of the slab reinforcement, an upper fin portion protruding from the side wall portion and arranged above the slab reinforcement, and a lower fin portion protruding from the side wall portion and arranged below the slab reinforcement, and the upper fin portion and the lower fin portion of the pair of the engaging portions protrude in a direction away from each other good. As a result, the engaging portion engages in the left-right direction, and the formwork support member does not move even if force is applied from either the left or right direction during concrete placement.

In the form support member according to the present invention, the upper fin portion may protrude longer than the lower fin portion. By setting the upper fin portion to be long, even if the formwork support member is slightly inclined, the engagement state is maintained and the formwork support member does not come off.

In the formwork support member according to the present invention, the upper structure has a second beam, and two height adjustment screws are provided at separated positions on the second beam. may be supported on the first beam portion, and a pair of the formwork receiving portions may be provided in the vicinity of both ends of the second beam portion. Such two height adjusting screws facilitate horizontal adjustment of the upper structure and prevent rotation of the upper structure with respect to the lower structure.

A formwork set according to the present invention includes two slab reinforcements and the formwork, and is characterized in that a plurality of the formwork support members are provided for the two slab reinforcements. and

In the formwork set according to the present invention, the slab reinforcement has a main reinforcement arranged vertically and horizontally in a grid pattern, and an auxiliary reinforcement arranged in addition to the main reinforcement. The two reinforcing bars with which the form support members are engaged may be the auxiliary reinforcing bars. Such auxiliary bar arrangement increases the degree of freedom in the installation location of the formwork support member.

In the formwork set according to the present invention, a plurality of formwork forms are provided via a discontinuous portion, and two auxiliary reinforcing bars are arranged across the discontinuous portion in a plan view. good. As a result, the strength of the man-through hole without the raised portion can be reinforced.

10 formwork set, 11 formwork support member, 12 foundation, 14 pressure plate section, 16 rising section, 16b intermediate section, 18 through hole, 20 slab reinforcement arrangement, 20a main reinforcement arrangement, 20b auxiliary reinforcement arrangement, 22 riser Bar arrangement 26 Center formwork 30 Base 40 Lower component 42 Upper component 44 Engagement part 44b Upper fin part 44c Lower fin part 46 Raising piece 48 First beam part 48a Screw hole , 52 formwork receiving portion, 54 second beam portion, 58 fixing nut, 60 adjusting nut, 62 spacer, 64 rail, 68 screw, 80 discontinuous portion

Claims (10)

A formwork support member for holding a formwork that constitutes a rising portion of a raft foundation,
a pair of engaging portions that respectively engage with two parallel slab reinforcements arranged in the pressure-resistant plate portion of the raft foundation;
a first beam portion connecting the pair of engaging portions;
a formwork receiver supported by the first beam and supporting the lower surface of the formwork;
A formwork support member comprising: a lower structure comprising the engaging portion and the first beam portion;
an upper structure comprising the formwork receiving portion, a height adjusting screw that protrudes downward and is inserted through a threaded hole formed in the first beam portion, and an adjusting nut that screws together with the height adjusting screw;
has
The upper structure is positioned in height with respect to the first beam portion by the threaded position of the adjustment nut, and can be separated from the lower structure by pulling out the height adjusting screw from the screw hole. The formwork support member according to claim 1, characterized in that: 3. A formwork support according to claim 2, wherein the upper construction is unconstrained to displace upwardly from the lower construction. The formwork according to claim 2 or 3, wherein a spacer having a height corresponding to the diameter of the slab reinforcement is provided between the adjusting nut and the first beam. support member. The engaging portion includes a side wall portion disposed laterally of the slab reinforcement, an upper fin portion projecting from the side wall portion and disposed above the slab reinforcement, and a slab portion projecting from the side wall portion. Equipped with a lower fin located below the muscle,
The formwork support member according to any one of claims 2 to 4, wherein the upper fin portion and the lower fin portion of the pair of engaging portions protrude away from each other. The mold support member according to claim 5, wherein the upper fin protrudes longer than the lower fin. The upper structure has a second beam,
two of the height adjusting screws are provided at spaced apart positions on the second beam portion to support the second beam portion with respect to the first beam portion;
The formwork support member according to any one of claims 2 to 6, wherein a pair of the formwork receiving portions are provided near both ends of the second beam portion. including two slab reinforcements and the formwork,
A formwork set, further comprising a plurality of the formwork support members according to any one of claims 1 to 7, which are provided for two of the slab reinforcements. The slab reinforcement has a main reinforcement arranged vertically and horizontally in a grid pattern, and an auxiliary reinforcement arranged in addition to the main reinforcement,
The formwork set according to claim 8, characterized in that the two of the formwork support members engaged are the auxiliary reinforcing bars. A plurality of the formwork are provided via a discontinuous portion,
The formwork set according to claim 9, wherein the two auxiliary reinforcing bars are arranged across the discontinuous portion in a plan view.

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