JP7185229B2 - sleeve support - Google Patents

Description

The present invention relates to a sleeve support that is arranged around an aperture in a reinforced concrete beam and is configured to support a sleeve that is installed to form the aperture when making such a beam.

Reinforced concrete buildings and the like are provided with reinforced concrete beams (hereinafter referred to as “RC beams” as necessary) extending in the horizontal direction. This RC beam may be required to be laid out efficiently so that people can pass through the RC beam during maintenance and inspection of facility piping, and piping, wiring, etc. can pass through the RC beam. In this case, An opening is formed through the RC beam in its width direction. Such an aperture is formed by placing concrete with the sleeve installed, and at this time, the periphery of the aperture is formed corresponding to the outer periphery of the sleeve. Then, when the RC beam is manufactured, a sleeve support configured to support the sleeve (hereinafter, simply referred to as "support" if necessary) may be installed around the sleeve.

For example, the support includes an annular muscle formed of a metal rod and formed to surround the opening, and a sleeve support muscle configured to support the sleeve from below. , may be arranged to intersect the circular muscle and may be formed to protrude inwardly of the circular muscle. In such a support, the sleeve support muscle is formed integrally with the same metal rod as the circular muscle, or formed separately from the circular muscle and welded to the circular muscle. (For example, see Patent Documents 1 and 2.)

Furthermore, when concrete is placed to produce RC beams, there is a possibility that the sleeve may be displaced due to, for example, lifting of the sleeve. Therefore, in order to prevent the sleeve from slipping out of position, generally, while the sleeve is supported by the sleeve supporting muscles, the wire is wrapped around the sleeve in the middle in the longitudinal direction, and both ends of the wire are tied to the main reinforcement. is being done. However, the wire may loosen due to pressure, vibration, or the like during concrete placement, and in this case, the sleeve may still be displaced. Furthermore, due to misalignment of the sleeve, there is a risk that rework such as concrete scraping will have to be performed. Therefore, support tools have been proposed to prevent the sleeve from being displaced.

As an example of such a support, there is a support provided with two sleeve pressing muscles for pressing the sleeve from above. More specifically, in such a support, each of the two sleeve presser muscles is made of a metal rod and is formed to protrude from the circular muscle toward the inside of the circular muscle. The longitudinal proximal ends of the muscles are welded to the circular muscles, and resin tip caps are fixed to the longitudinal distal ends of the sleeve presser muscles. (For example, see Patent Document 3.)

Japanese Patent Application Laid-Open No. 2003-20755 JP 2005-180175 A Japanese Patent Application Laid-Open No. 2007-162360

In one example of the above support, the base end of each sleeve presser bar made of a metal rod is welded to the circular muscle, so that the tip end of each sleeve presser bar is fixed at a fixed position. For this reason, individual differences in the support and sleeve, and variations in installation conditions of the support and sleeve may occur. As a result, variations in the distance between the sleeve and the sleeve presser muscle may occur. Such variations affect the positional displacement of the sleeve, which is not preferable.

Furthermore, in one example of the support, the tip of the sleeve presser muscle is fixed at a fixed position corresponding to one type of sleeve having a specific size. Therefore, when using another type of sleeve having a different size from this one type of sleeve, it is necessary to prepare another support having a sleeve presser muscle corresponding to the other type of sleeve. It is troublesome to prepare various supports according to various sleeves in this way, and there is a possibility that the manufacturing efficiency of RC beams may be lowered.

In view of the above circumstances, it is desirable to prevent a decrease in the manufacturing efficiency of the reinforced concrete beam and to effectively prevent the sleeve from being displaced.

In order to solve the problem, a sleeve support according to one aspect is arranged around an opening that penetrates in the width direction of a reinforced concrete beam, and in order to form the opening, A sleeve support configured to support a sleeve during installation having a correspondingly shaped outer perimeter, the annular body configured to be positionable around the perimeter of the aperture. and a sleeve receiver formed so as to protrude from the annular body toward the inner peripheral side of the annular body, wherein the sleeve receiver is supported by the annular body; and an adjusting portion formed so as to protrude toward the inner peripheral side of the sleeve.

A sleeve support according to another aspect is arranged around an opening that penetrates in the width direction of a reinforced concrete beam, and is formed corresponding to the peripheral edge of the opening in order to form the opening. a sleeve support configured to be able to support the sleeve when installing the sleeve having an outer peripheral portion that is curved, the annular body configured to be arranged so as to surround the peripheral portion of the opening; a sleeve receiver formed so as to protrude from the body toward the inner peripheral side of the annular body, wherein the sleeve receiver is supported by the annular body; and the sleeve receiver protrudes from the support section. an adjusting portion configured to be movable in a direction; an engaging portion configured to be engageable with the adjusting portion; a urging portion configured to urge the adjustment portion to the inner peripheral side of the annular body from the support portion; and a plurality of projections spaced apart from each other in the projecting direction of the adjusting portion, wherein the engaging portion is engaged with any one of the plurality of projections of the adjusting portion by the biasing portion. It is configured to be movable with respect to the support so as to be selectively engageable while being pressed in the biasing direction.

According to the sleeve support according to each of the above one aspect and another aspect, it is possible to prevent a decrease in production efficiency in the beam of reinforced concrete, and to efficiently prevent the positional deviation of the sleeve.

FIG. 4 is a perspective view schematically showing the beam on which the sleeve support according to the first embodiment is installed, with the sleeve installed before concrete is poured; 1 is a front view schematically showing a sleeve support according to a first embodiment; FIG. (a) It is a longitudinal cross-sectional view schematically showing one side sleeve receiver of the sleeve support according to the first embodiment. (b) It is the figure seen from arrow A of Fig.3 (a). FIG. 11 is a front view schematically showing a sleeve support according to a second embodiment; FIG. 11 is a front view schematically showing a sleeve support according to a third embodiment; FIG. 11 is a front view schematically showing a sleeve support according to a fourth embodiment; FIG. 11 is a front view schematically showing a sleeve support according to a fifth embodiment; FIG. 11 is a front view schematically showing a sleeve support according to a sixth embodiment; FIG. 21 is a perspective view schematically showing one side sleeve receiver and its surroundings of a sleeve support according to a seventh embodiment; FIG. 21 is a perspective view schematically showing a support portion of one side sleeve receiver of a sleeve support according to a seventh embodiment; FIG. 21 is a perspective view schematically showing an engaging portion of one side sleeve receiver of a sleeve support according to a seventh embodiment;

A sleeve support and a beam having the sleeve support according to the first to seventh embodiments will be described. The beam according to each embodiment is a reinforced concrete beam. In addition, the beams according to the first to seventh embodiments have the same structure as each other except for the sleeve support provided thereon (hereinafter simply referred to as "support" if necessary). and Therefore, the description of such a beam structure will be described in the first embodiment, and will be omitted in the second to seventh embodiments. In addition, in each embodiment, welding shall be used when "joining" a component. However, this does not limit the present invention, and if the strength of the beam can be sufficiently ensured, or the strength of supporting the sleeve can be sufficiently ensured, when the components are "joined" together, other methods than welding can be used. means may be used.

[First embodiment]
A support according to the first embodiment and a beam having the support will be described.

[Regarding beam structure and beam fabrication process]
First, with reference to FIGS. 1 and 2, the structure of the beam 1 according to the present embodiment will be described together with the manufacturing process of the beam 1. FIG. The beam 1 according to this embodiment is arranged along the horizontal direction of the building. In particular, the beam 1 may extend substantially straight along the horizontal direction and may have a substantially square cross-section, but this does not limit the invention. The beam 1 may also be a foundation beam connecting foundations (not shown) under the columns of the building, but this is also not a limitation of the invention.

In FIG. 1, the beam 1 is in the middle of its fabrication with a sleeve S installed along the width direction (indicated by the arrow W) of the beam 1 before concrete is poured. At this time, the support 10 according to the present embodiment is arranged around the sleeve S and can support the sleeve S. As shown in FIG. After the beam 1 is in the middle of production as shown in FIG. 1, concrete is placed and then the sleeve S is pulled out along the width direction of the beam 1. As a result, as shown in FIG. 2, the beam 1 is formed so as to have an opening 2 penetrating in its width direction. In addition to FIG. 2, in FIGS. 4 to 8 used for explanation later, the openings 2 are indicated by imaginary lines.

As shown in FIG. 2, the beam 1 has a portion 3 made of concrete (hereinafter referred to as "concrete portion"), and the opening 2 penetrates the concrete portion 3 in the width direction. As shown in FIG. 1, the outer peripheral portion s1 of the sleeve S used for forming the aperture 2 is formed corresponding to the peripheral edge portion 2a of the aperture 2. As shown in FIG. The sleeve S is arranged so that its center axis s2 substantially coincides with the center axis 2b of the aperture 2 when it is installed on the beam 1 (hereinafter referred to as "sleeve installed state"). A support 10 is arranged around the aperture 2 inside the concrete portion 3 . In FIG. 1, as an example, two supports 10 are spaced apart from each other in the direction along the central axis s2 of the sleeve S, but this does not limit the present invention.

As shown in FIG. 2 again, the cross section at the peripheral edge 2a of the opening 2 is formed in a substantially circular shape. The opening 2 is preferably formed in a size that allows equipment pipes, people, equipment, etc. to pass through. Good to have. However, the cross section at the periphery of the aperture is not limited to this, and may be formed, for example, in a substantially polygonal shape. In this case, the diameter of the circumscribed circle of the cross section is defined as the diameter of the aperture.

[About the sleeve support]
The sleeve support 10 according to this embodiment will be described with reference to FIGS. 2, 3(a) and 3(b). As shown in FIG. 2 , the support 10 has an annular body 20 that can be arranged to surround the peripheral edge 2 a of the aperture 2 . The support 10 has three sleeve receptacles 30 and 40 formed so as to protrude from the annular body 20 toward its inner circumference. One sleeve receiver 30 out of the three sleeve receivers 30 and 40 is defined as one positioned on one side of a horizontal reference line 20b substantially perpendicular to the central axis 20a of the annular body 20. The receiver 30 is called a one-side sleeve receiver 30 . The remaining two sleeve receivers 40 out of the three sleeve receivers 30 and 40 are defined as those located on the other side of the horizontal reference line 20b. call.

As shown in FIGS. 3A and 3B, the one-side sleeve receiver 30 includes a support portion 31 supported by the annular body 20 and protruding from the support portion 31 toward the inner peripheral side of the annular body 20. and an adjustment portion 32 formed as follows. The adjustment portion 32 is screwed into the support portion 31 so that the protrusion amount of the one-side sleeve receiver 30 can be changed. In this specification, a sleeve receiver configured to be able to change the protrusion amount like the one-side sleeve receiver 30 is referred to as a "movable sleeve receiver". On the other hand, the sleeve receiver 40 on the other side is fixed so that the amount of protrusion thereof is constant. In this specification, a sleeve receiver that is fixed with a constant protrusion amount like the sleeve receiver 40 on the other side is referred to as a "fixed sleeve receiver". The one-side and the other-side sleeve receivers 30 and 40 are misaligned at least in the vertical direction of the radial direction of the sleeve S, preferably in the vertical direction of the radial direction of the sleeve S, when concrete is placed in a state where the sleeves are installed. and horizontal misalignment.

However, the support can have more than one unilateral sleeve receiver. Also, the support can have one or more other sleeve receivers. Some of these configurations will be described later in third to fifth embodiments.

Regarding the specific positional relationship between the sleeve receivers 30 and 40 on one side and the other side, as shown in FIG. , “supporting device installed state”), the horizontal reference line 20b of the annular body 20 is arranged substantially along the horizontal direction. The sleeve receiver 30 on one side is arranged above the horizontal reference line 20b, and the sleeve receiver 40 on the other side is arranged below the horizontal reference line 20b.

Then, in the state where the support is installed, the one-side sleeve receiver 30, particularly the adjusting portion 32 thereof, is arranged on or along the arrangement axis L substantially perpendicular to the center axis 2b of the aperture 2. As shown in FIG. Furthermore, the one-side sleeve receiver 30, particularly its adjustment portion 32, is arranged on or along a vertical reference line 20c substantially perpendicular to the central axis 20a of the annular body 20 and the horizontal reference line 20b. Good. More specifically, the one-side sleeve receiver 30 , particularly its adjusting portion 32 , is preferably oriented such that its projecting direction is directed vertically, and is arranged directly above the central axis 2 b of the aperture 2 .

The two other-side sleeve receivers 40 are positioned within a predetermined other-side arrangement range Q. As shown in FIG. In the other-side arrangement range Q, two other-side boundary lines q1 and q2 linearly extending from the central axis 20a of the annular body 20 toward the outer peripheral side of the annular body 20 form an annular shape with the central axis 20a of the annular body 20 as a reference. It is set so as to sandwich the body 20 at a predetermined angle θ1 in the circumferential direction. For example, from the viewpoint of preventing positional displacement of the sleeve S in both the vertical direction and the horizontal direction among the radial directions of the sleeve S in the installed state, the angle θ1 is preferably about 110 degrees.

Further, the two other-side sleeve receivers 40 are arranged on both sides of the other-side center line q3 located in the center between the two other-side boundary lines q1 and q2 in the circumferential direction of the annular body 20, respectively. Preferably, the two other-side sleeve receivers 40 are arranged substantially line-symmetrically with respect to the other-side center line q3. The other side center line q3 is arranged to extend downward in the vertical direction from the center axis 2b of the opening 2. As shown in FIG.

However, the present invention is not limited to this, and as long as it is possible to effectively prevent the positional displacement of the sleeve, in the state in which the support is installed, the one-side sleeve receiver can be placed relative to the horizontal reference line substantially in the horizontal direction. It is also possible to arrange the other sleeve receiver above this horizontal reference line while disposing it below the horizontal reference line. In addition to this, the support can be configured to be upside down.

[Details of the toroid]
Details of the annular body 20 will be described with reference to FIG. The annular body 20 includes an inner ring muscle 21 formed so as to surround the peripheral portion 2a of the aperture 2 and an outer ring muscle 21 positioned on the outer peripheral side of the inner ring muscle 21 so as to surround the inner ring muscle 21. 22. The inner and outer ring muscles 21, 22 are separate. Each of the inner and outer ring muscles 21, 22 is preferably made of a metal material. In this case, the type of metal material for the inner and outer ring bars 21, 22 should be such that the inner and outer ring bars 21, 22 can be welded together.

Each of the inner and outer ring muscles 21, 22 has a plurality of corners 21a, 22a which are spaced from each other in the circumferential direction thereof and which are curved or bent. Each of the inner and outer ring muscles 21, 22 also has a plurality of sides 21b, 22b, each side 21b, 22b extending between adjacent corners 21a, 22a in the circumferential direction thereof. Each of the side portions 21b and 22b preferably extends linearly, but it is also possible to extend while curving. The inner ring muscle 21 is preferably formed in a substantially polygonal shape having four or more corners 21a. The outer ring muscle 22 is also preferably formed in a substantially polygonal shape having four or more corners 22a. The number of corners 22a of the outer ring muscle 22 is preferably greater than or equal to the number of corners 21a of the inner ring muscle 21, but is not limited to this. A corner portion 21a of the inner ring muscle 21 abuts and is joined to a side portion 22b of the outer ring muscle 22 corresponding to the corner portion 21a in the circumferential direction of the annular body 20 .

Both the central axes 21c, 22c of the inner and outer ring muscles 21, 22 are defined as the central axis 20a of the annular body 20. As shown in FIG. The central axes 21c, 22c of the inner and outer ring muscles 21, 22 may substantially coincide with each other when viewed along the central axis 2b of the aperture 2, and these central axes 21c, 22c are substantially aligned with the aperture 2. is preferably arranged on the central axis 2b of the . However, if sleeve misalignment could be effectively prevented, the central axes of the inner and outer ring muscles would be offset from each other so that only one of the central axes of the inner and outer ring muscles would be aligned with the central axis of the annulus. may be defined as

In FIG. 2, as an example, the inner ring muscle 21 is formed in a substantially square shape, more specifically in a substantially square shape, and the outer ring muscle 22 is formed in a substantially octagonal shape, more specifically in a substantially regular shape. It is formed in an octagonal shape. However, this does not limit the inner and outer ring muscles.

In addition, in the annular body, the inner and outer ring muscles can be integrally formed using one metal material, and the inner and outer ring muscles are preferably formed continuously in a unicursal shape. In this case, one of the plurality of corners of the inner ring muscle connects a plurality of side portions of the outer ring muscle corresponding to that corner in the circumferential direction of the annular body to one material. be formed integrally with the Further, the remainder of the corners of the inner ring muscle are preferably abutted and joined to the side parts of the outer ring muscle corresponding to the corners in the circumferential direction of the toroid.

[Details of one side sleeve holder]
The details of the one-side sleeve receiver 30 will be described with reference to FIGS. 2, 3(a) and 3(b). As shown in FIG. 2 , the support portion 31 of the one-side sleeve receiver 30 has a joint area 31 a that is joined to the annular body 20 . Furthermore, the joint area 31a extends across both the inner and outer ring muscles 21,22 of the toroid 20 and is joined to both the inner and outer ring muscles 21,22. More specifically, the joint area 31 a is joined to the joint between the corner 21 a of the inner ring bar 21 and the side 22 b of the outer ring bar 22 .

As shown in FIGS. 3(a) and 3(b), the support portion 31 also has a male threaded section 31b that protrudes substantially linearly from the joint section 31a toward the inner peripheral side of the annular body 20. As shown in FIG. A helical thread is cut on the outer peripheral surface of the male thread section 31b. The support portion 31 is preferably configured using a metal material. In this case, the kind of metal material of the support part 31 should be one that can be welded to the inner and outer ring bars 21 and 22 .

The tip of the one-side sleeve receiver 30 in the projecting direction of the adjustment portion 32 constitutes the tip of the one-side sleeve receiver 30 in the projecting direction. The adjustment part 32 is preferably made of plastic. The adjustment portion 32 is formed to extend along the male threaded section 31 b of the support portion 31 . The adjustment portion 32 has a female threaded area 32a recessed corresponding to the male threaded area 31b. Threads corresponding to the threads of the male threaded section 31b are cut on the inner peripheral surface of the female threaded section 32a.

In the one-side sleeve receiver 30 , the male threaded section 31 b of the support section 31 can be screwed into the female threaded section 32 a of the adjustment section 32 . Therefore, by rotating the adjusting portion 32, the amount of projection of the one-side sleeve receiver 30 can be adjusted. Specifically, the tip position of the adjusting portion 32 in the protruding direction of the one-side sleeve receiver 30 can be adjusted. Then, as shown in FIG. 2, in the sleeve installed state, the adjusting portion 32 can be adjusted so that the tip of the adjusting portion 32 can receive the sleeve S to prevent the sleeve S from being displaced.

However, the one-side sleeve receiver of the present invention is not limited to this, and the support portion may have the female threaded section and the adjusting portion may have the male threaded section.

[Details of the sleeve receiver on the other side]
Details of the other sleeve receiver 40 will be described with reference to FIG. The other-side sleeve receiver 40 has a main body portion 41 extending along the projecting direction thereof, and a cap portion 42 attached to the tip region of the main body portion 41 in the projecting direction. A base end section of the body portion 41 in the projecting direction is joined to the inner ring bar 21 . The main body part 41 is preferably configured using a metal material. In this case, the metal material of the main body portion 41 should preferably be one that can be welded to the inner ring bar 21 . The cap part 42 is preferably made of plastic, but is not limited to this.

The base end regions of the body portions 41 of the two other sleeve receivers 40 can be connected by a connecting body 43 . The connecting body 43 is preferably made of a metal material, and in this case, the metal material of the connecting body 43 is preferably one that can be welded to the inner ring bar 21 . The two main body portions 41 and the connecting body 43 are preferably integrally formed using one metal material, but are not limited to this.

As described above, according to the support 10 according to the present embodiment, the one-side sleeve receiver 30 is a movable sleeve receiver whose protrusion amount can be adjusted. Also, the adjusting portion 32 of the one-side sleeve receiver 30 can be made of plastic. Therefore, the distance between the tip of the one-side sleeve receiver 30 and the sleeve S can be appropriately set so as to prevent the sleeve S from being displaced when the support tool is installed and the sleeve is installed before concrete is poured. For example, after the support 10 is placed around the sleeve S, the distance between the tip of the one-side sleeve receiver 30 and the sleeve S can be changed by adjusting the position of the adjustment portion 32 in the protruding direction. can be set more appropriately according to the individual and specific positional relationship of Also, the amount of protrusion of the one-side sleeve receiver 30 can be adjusted so as to correspond to various sleeves S having different sizes. As a result, for example, it is sufficient to prepare one type of support 10 for each of a plurality of types of sleeves S having different sizes. Therefore, it is possible to prevent the production efficiency of the beam 1 from being lowered. Therefore, the production efficiency of the beam 1 can be prevented from being lowered, and the displacement of the sleeve S can be efficiently prevented.

According to the support 10 according to the present embodiment, after the support 10 is installed around the sleeve S, if the position of the adjusting portion 32 in the projecting direction is adjusted so that the adjusting portion 32 is brought into contact with the sleeve S, The sleeve S can be reliably supported by the support 10 .

According to the support 10 according to the present embodiment, when the support 10 is installed before concrete is placed and the sleeve is installed, the adjusting portion 32 of the one-side sleeve receiver 30 is arranged such that the protruding direction thereof is oriented vertically. oriented and located directly above the center axis 2b of the aperture 2, the sleeve S can be efficiently received by the adjusting portion 32 even if the sleeve S tries to float upward. As a result, the lifting of the sleeve S can be effectively prevented. Therefore, the displacement of the sleeve S can be efficiently prevented.

[Second embodiment]
A support according to the second embodiment will be described. Unless otherwise specified, the support according to this embodiment is the same as the support according to the first embodiment. If the components of this embodiment are the same as the components of the first embodiment, they are given the same names and symbols unless otherwise specified.

As shown in FIG. 4, the annular body 60 of the support 50 according to this embodiment includes inner and outer ring muscles 61, 62 similar to the inner and outer ring muscles 21, 22 according to the first embodiment, respectively. , a mounting member 63 . The mounting member 63 extends so as to bridge adjacent side portions 61 b of the inner ring muscle 61 . The mounting member 63 is arranged above the aperture 2 . The mounting member 63 is joined to adjacent side portions 61 b of the inner ring muscle 61 . The mounting member 63 is preferably constructed using a metal material, and the type of such metal material is preferably one that can be welded to the inner ring bar 61 .

The support 50 has one one-sided sleeve receiver 70 configured as a movable sleeve receiver. The support 50 also has two other sleeve receptacles 40 according to the first embodiment which are configured as fixed sleeve receptacles. The one-side sleeve receiver 70 includes a support portion 71 configured in the same manner as the support portion 31 of the first embodiment except for the following points, and an adjustment portion 72 configured in the same manner as the adjustment portion 32 of the first embodiment. and The support portion 71 is supported by the mounting member 63 of the annular body 60 .

As in the first embodiment, the one-side sleeve receiver 70 , particularly its adjusting portion 72 , is arranged on or along the arrangement axis L substantially orthogonal to the central axis 2 b of the aperture 2 . Furthermore, the one-side sleeve receiver 70, particularly its adjustment portion 72, is arranged on or along a vertical reference line 60c substantially perpendicular to the central axis 60a of the annular body 60 and the horizontal reference line 60b. Good.

The support portion 71 has a joint area 71a that is joined to the mounting member 63, and an externally threaded area 71b configured similarly to the externally threaded area 31b of the first embodiment. Adjacent side portions 61b of the inner ring bar 61 and joint areas 71a of the support portions 71 of the one-side sleeve receiver 70 are joined to the mounting member 63 from the same side in the direction along the center axis 2b of the opening 2. Good. The joint area 71a is spaced apart from the corner portion 61a located between the adjacent side portions 61b of the inner ring bar 61 to which the mounting member 63 is joined. The support portion 71 is preferably configured using a metal material. In this case, the metal material of the support portion 71 should preferably be one that can be welded to the inner ring bar 61 .

As described above, according to the support 50 according to the present embodiment, the same effects as those of the support 10 according to the first embodiment can be obtained. Furthermore, the mounting of the one-side sleeve receiver 70 can be facilitated.

[Third embodiment]
A support according to the third embodiment will be described. Unless otherwise specified, the support according to this embodiment is the same as the support according to the first embodiment. If the components of this embodiment are the same as the components of the first embodiment, they are given the same names and symbols unless otherwise specified.

As shown in FIG. 5, the support 80 according to the present embodiment includes two one-side sleeve receivers 90 configured as movable sleeve receivers and two sleeve receivers according to the first embodiment configured as fixed sleeve receivers. and a sleeve receiver 40 on the other side. Each one-side sleeve receiver 90 includes a support portion 91 constructed in the same manner as the support portion 31 of the first embodiment except for the following points, and an adjustment portion constructed in the same manner as the adjustment portion 32 of the first embodiment. 92. The support 91 has a joint area 91a which is similar to the joint area 31a of the first embodiment in that it is joined to the inner and outer ring bars 21,22. However, the joint area 91a is joined to the sides 21b, 22b of the inner and outer ring bars 21, 22 and differs from the joint area 31a of the first embodiment in this respect. The support 91 also has an externally threaded section 91b configured similarly to the externally threaded section 31b of the first embodiment.

The two one-sided sleeve receptacles 90, in particular, their adjusting portions 92, are located within a predetermined one-sided arrangement range P. As shown in FIG. In the one-side arrangement range P, two one-side boundary lines p1 and p2 linearly extending from the central axis 20a of the annular body 20 toward the outer peripheral side of the annular body 20 are circular with the central axis 20a of the annular body 20 as a reference. It is set so as to sandwich the body 20 at a predetermined angle θ2 in the circumferential direction. For example, the angle θ2 is preferably about 110 degrees from the viewpoint of preventing the sleeve S from being displaced in both the vertical direction and the horizontal direction among the radial directions when the support is installed.

Further, the two one-side sleeve receivers 90 are respectively arranged on both sides of the one-side center line p3 located in the center between the two one-side boundary lines p1 and p2 in the circumferential direction of the annular body 20 . Preferably, the two one-side sleeve receivers 90 are arranged substantially symmetrically with respect to the one-side center line p3. Each one-sided sleeve receiver 90 , particularly its adjustment portion 92 , may also be arranged on or along an alignment axis L substantially perpendicular to the central axis 2 b of the aperture 2 . The one-side center line p3 is arranged to extend upward in the vertical direction from the center axis 2b of the opening 2. As shown in FIG.

As described above, the support 80 according to the present embodiment has the same effects as the support 10 according to the first embodiment, except for the effect based on the provision of one one-side sleeve receiver 30 according to the first embodiment. Obtainable. In addition, according to the support 80 according to the present embodiment, even when the two one-side sleeve receivers 90 come into contact with the sleeve S during the work of removing the sleeve S, the load from the sleeve S is The sleeve S can be smoothly slid against the two one-side sleeve receivers 90 because of the efficient distribution by the side sleeve receivers 90 . Further, even if the sleeve S tries to float upward, the sleeve S can be efficiently received while dispersing the force from the sleeve S by the two one-side sleeve receivers 90 .

[Fourth Embodiment]
A support according to the fourth embodiment will be described. Unless otherwise specified, the support according to this embodiment is the same as the support according to the first embodiment. If the components of this embodiment are the same as the components of the first embodiment, they are given the same names and symbols unless otherwise specified.

As shown in FIG. 6, the support 100 according to this embodiment also has one one-sided sleeve receiver 30 configured as a movable sleeve receiver. Such a support 100 also has two other sleeve receivers 110 configured as movable sleeve receivers instead of the two other sleeve receivers 40 according to the first embodiment configured as fixed sleeve receivers.

In such a support 100, the two other sleeve receivers 110 are support sections configured in the same manner as the support section 91 and adjustment section 92 of the one sleeve receiver 90 of the third embodiment, except for their orientation directions. 111 and an adjustment unit 112 . The support 111 has a joint area 111a and an externally threaded area 111b configured similarly to the joint area 91a and the externally threaded area 91b of the third embodiment, respectively. The two other-side sleeve receivers 110, particularly their adjusting portions 112, are located in the other-side arrangement range Q, like the two other-side sleeve receivers 40 according to the first embodiment. Furthermore, each of the other sleeve receivers 110, particularly the adjusting portion 112 thereof, has the same arrangement relationship as the two other sleeve receivers 40 according to the first embodiment, and is substantially aligned with the central axis 2b of the opening 2. It may be arranged on or along an orthogonal arrangement axis L.

In addition, the support described above can also be applied to the support according to the second embodiment instead of the support according to the first embodiment.

As described above, the support 100 according to the present embodiment can obtain the same effects as the support 10 according to the first embodiment. In addition, in the support 100 according to the present embodiment, even when the sleeve S is about to sink downward, the two other-side sleeve receivers 110 disperse the force from the sleeve S and support the sleeve S. It can be received efficiently, and the sleeve S can be efficiently supported from below. In the sleeve installed state, the adjustment portion 32 of one sleeve receiver 30 that can receive the sleeve S from above and the adjustment portions 112 of the two other sleeve receivers 110 that can receive the sleeve S from below. By appropriately adjusting the position, it is possible to effectively prevent the sleeve S from being dislocated.

[Fifth embodiment]
A support according to the fifth embodiment will be described. The support according to this embodiment is the same as the support according to the third embodiment unless otherwise specified. If the components of this embodiment are the same as those of the third embodiment, they will be given the same names and symbols unless otherwise specified.

As shown in FIG. 7, the support 120 according to this embodiment has two one-sided sleeve receivers 90 according to the third embodiment configured as movable sleeve receivers. The support 120 according to this embodiment is also configured as movable sleeve receivers according to the fourth embodiment instead of the two other sleeve receivers 40 according to the third embodiment which are configured as fixed sleeve receivers. It has two sleeve receivers 110 on the other side. Preferably, the support 120 is substantially symmetrical with respect to the horizontal reference line 20b of the annular body 20 . In this case, the support 120 is configured to be capable of being turned upside down so as to be particularly suitable for effectively preventing the sleeve S from being displaced.

As described above, the support 120 according to the present embodiment can obtain the same effect as the support 80 according to the third embodiment and the same effect as the other sleeve receiver 110 according to the fourth embodiment. . In the sleeve installed state, two adjusting portions 92 of one side sleeve receiver 90 that can receive the sleeve S from above and two adjusting portions 112 of the other side sleeve receiver 110 that can receive the sleeve S from below. By appropriately adjusting the position, it is possible to effectively prevent the sleeve S from being dislocated.

[Sixth embodiment]
A support according to the sixth embodiment will be described. The support according to this embodiment is the same as the support according to the fourth embodiment unless otherwise specified. If the components of this embodiment are the same as those of the fourth embodiment, they will be given the same names and symbols unless otherwise specified.

As shown in FIG. 8, the support 130 according to this embodiment has two sleeve receivers 110 on the other side according to the fourth embodiment, and one sleeve receiver 30 on the other side according to the fourth embodiment. It is configured not to According to the supporting member 130 according to this embodiment, it is possible to obtain the same effects as those based on the other side sleeve receiver 110 according to the fourth embodiment.

[Seventh Embodiment]
A support according to the seventh embodiment will be described. The support according to this embodiment is similar to the support according to the first embodiment, except for the movable sleeve receiver. If the components of this embodiment are the same as the components of the first embodiment, they are given the same names and symbols unless otherwise specified.

A sleeve support 140 according to the present embodiment will be described with reference to FIGS. 9 to 11. FIG. As shown in FIG. 9, the support 140 has one one-side sleeve receiver 150 configured as a movable sleeve receiver instead of the one-side sleeve receiver 30 according to the first embodiment. The one-side sleeve receiver 150 is formed so as to protrude from the annular body 20 toward its inner peripheral side. The one-side sleeve receiver 150 is arranged in the same manner as the one-side sleeve receiver 30 according to the first embodiment.

Note that the support can also have two or more one-sided sleeve receivers. Further, a movable sleeve receiver configured in the same manner as the one-side sleeve receiver 150 according to this embodiment can also be applied in place of the movable sleeve receiver described above in the second to sixth embodiments.

The one-side sleeve receiver 150 has a support portion 151 supported by the annular body 20 and an adjustment portion 152 configured to be movable with respect to the support portion 151 in the projecting direction of the sleeve receiver 150 . The adjustment portion 152 has a tip section 152a that protrudes from the support portion 151 toward the inner circumference of the annular body 20 . The adjusting portion 152 also has a plurality of protrusions 152c that protrude from its outer peripheral surface 152b and are spaced apart from each other in the direction in which the adjusting portion 152 protrudes.

The one-side sleeve receiver 150 has an engaging portion 153 configured to be engageable with the adjusting portion 152 . The one-side sleeve receiver 150 also has a compression coil spring 154 that is a biasing portion configured to bias the engaging portion 153 in a biasing direction from the distal end of the adjustment portion 152 in the protruding direction toward the proximal end thereof. However, the biasing portion is not limited to the compression coil spring. The engagement portion 153 is movable with respect to the support portion 151 so as to be selectively engaged with any one of the plurality of projections 152c of the adjustment portion 152 while being pressed in the urging direction by the compression coil spring 154. is configured to

Further, the one-side sleeve receiver 150 may be configured in detail as follows. As shown in FIGS. 9 and 10 , the support portion 151 of the one-side sleeve receiver 150 has an attachment area 151 a attached to the annular body 20 . The mounting area 151 a is located on the base end side of the support portion 151 in the projecting direction of the one-side sleeve receiver 150 . The attachment area 151 a is formed in a substantially U-shape that opens toward the inner peripheral side of the annular body 20 .

As shown in FIG. 9, in this embodiment, the attachment area 151a is formed to hold both the inner and outer ring muscles 21, 22 of the annular body 20, and both the inner and outer ring muscles 21, 22 are spliced. More specifically, the attachment area 151a is joined to the joining portion between the corner portion 21a of the inner ring bar 21 and the side portion 22b of the outer ring bar 22 . The support portion 151 is preferably configured using a metal material. In this case, the type of metal material for the support portion 151 should be one that can be welded to the inner and outer ring bars 21 and 22 . However, the material of the support may be a material other than a metallic material that allows the support to be rigidly attached to the annular body.

Note that when a movable sleeve receiver configured in the same manner as the one-side sleeve receiver 150 according to the present embodiment is applied in place of the above-described movable sleeve receiver in each of the second to sixth embodiments, mounting The section may be formed so as to be able to hold the component to which the joint section of the movable sleeve receiver according to each of the second to sixth embodiments was attached, and may be joined with the same component.

As shown in FIGS. 9 and 10 , the support portion 151 has a support area 151 b configured to support the adjustment portion 152 . The support area 151b is positioned on the distal end side of the support portion 151 in the projecting direction of the sleeve receiver 150 on one side. The support area 151b has a support hole 151c penetrating in the projection direction of the adjustment part 152 so that the adjustment part 152 can be inserted. Further, the support hole 151c may be formed to support the adjustment part 152 while allowing the adjustment part 152 to move relative to the support area 151b in the projecting direction of the adjustment part 152 .

The support portion 151 has an intermediate section 151d extending between the attachment section 151a and the support section 151b in the projecting direction of the sleeve receiver 150 on one side. The support area 151b is preferably formed so as to stand up from the intermediate area 151d in the direction along the center axis 2b of the aperture 2. As shown in FIG. The intermediate section 151d has a retaining hole 151e therethrough so that the engaging portion 153 can be retained.

As shown in FIG. 10, the retaining hole 151e may pass through the intermediate section 151d in a direction along the central axis 2b of the aperture 2. As shown in FIG. The width of the holding hole 151e is preferably tapered from the base end side to the tip side of the support portion 151 in the direction along the center axis 2b of the opening 2. As shown in FIG. The maximum length of the holding hole 151e in the direction along the central axis 2b of the opening 2 is preferably larger than the maximum width of the holding hole 151e.

As shown in FIG. 9, the adjustment portion 152 has a body section 152d extending in the direction in which the one-side sleeve receiver 150 protrudes. The tip section 152a of the adjusting portion 152 is preferably attached to the tip of the body section 152d in the projecting direction of the sleeve receiver 150 on one side. Tip section 152a may be made of plastic. In addition, the material of the area other than the tip area 152a is preferably a metal material. However, the material of the area other than the tip area may be a material other than a metal material that can stably support the sleeve and stably engage with the engaging portion.

The outer peripheral surface of the main body section 152d is preferably the outer peripheral surface 152b provided with the projections 152c in the adjustment portion 152. As shown in FIG. The protrusion 152c of the adjusting portion 152 extends over the entire circumferential direction of the outer peripheral surface 152b. However, the protrusion may extend along a part of the outer peripheral surface in the circumferential direction. A plurality of protrusions 152c are provided independently of each other. However, multiple projections may be connected to each other by intermediate elements extending between adjacent projections. For example, the plurality of protrusions and the intermediate element may be integrally formed in a helical shape.

As shown in FIGS. 9 and 11, the engagement portion 153 has a body section 153a configured to be engageable with the adjustment portion 152. As shown in FIGS. As shown in FIG. 11, the body section 153a has an engagement hole 153b penetrating in the projection direction of the adjusting portion 152 so that the adjusting portion 152 can be inserted. The body section 153a also has an engaging edge 153c located around the perimeter of the engaging hole 153b. The engaging edge 153c can selectively engage with any one of the plurality of projections 152c. It is preferable that the engaging portion 153 is made of a metal material. However, the material of the engaging portion may be a material other than a metal material that can be stably used with the adjusting portion.

The engaging portion 153 has a holding area 153 d held by the support portion 151 . Specifically, the holding section 153d is held by the intermediate section 151d of the support portion 151 while being inserted into the holding hole 151e. The holding area 153d is formed in a substantially T shape.

The holding section 153d has a proximal end 153e directly connected to the body section 153a and a distal end 153f wider than the proximal end 153e. Distal end 153f is connected to body section 153a via proximal end 153e. The width of the tip 153f is preferably smaller than the maximum length of the holding hole 151e and larger than the maximum width of the holding hole 151e. The width of the proximal end 153e is preferably smaller than the maximum length and maximum width of the holding hole 151e.

When attaching the engaging portion 153 to the support portion 151, the holding area 153d is inserted into the holding hole 151e with the width direction of the tip 153f of the holding area 153d along the longitudinal direction of the holding hole 151e. It is preferable to rotate the engaging portion 153 so that the width direction of the tip 153f of the section 153d is aligned with the width direction of the holding hole 151e. When the engaging portion 153 is attached to the support portion 151, the tip 153f of the holding area 153d serves as a retainer to prevent the holding area 153d from coming off from the holding hole 151e.

Further, the holding area 153d of the engaging portion 153 is preferably inserted into the holding hole 151e with play in the direction in which the adjusting portion 152 protrudes. When the engaging portion 153 is attached to the support portion 151, the body section 153a of the engaging portion 153 is movable in the direction in which the adjusting portion 152 protrudes. In particular, it is preferable that the engaging portion 153 can swing in the projecting direction of the adjusting portion 152 with the holding hole 151e of the supporting portion 151 as a reference.

As shown in FIG. 9, the compression coil spring 154 is spirally wound. The inner diameter of such a compression coil spring 154 is defined to allow the adjustment portion 152, and in particular its body section 152d, to be inserted. The compression coil spring 154 is arranged between the support section 151b of the support section 151 and the body section 153a of the engagement section 153 with the adjustment section 152 inserted therein. Therefore, the compression coil spring 154 can bias the body section 153a of the engaging portion 153 in the biasing direction.

As described above, according to the support 140 according to the present embodiment, the one-side sleeve receiver 150 is a movable sleeve receiver whose protrusion amount can be adjusted. Also, the tip section 152a of the adjustment portion 152 of the one-side sleeve receiver 150 can be made of plastic. Therefore, the distance between the tip of the one-side sleeve receiver 150 and the sleeve S can be appropriately set so as to prevent the sleeve S from being displaced when the support tool is installed and the sleeve is installed before concrete is placed. For example, after setting the support 140 around the sleeve S, the distance between the tip of the one-side sleeve receiver 150 and the sleeve S can be changed by adjusting the position of the adjusting portion 152 in the protruding direction. can be set more appropriately according to the individual and specific positional relationship. Also, the amount of protrusion of the one-side sleeve receiver 150 can be adjusted so as to correspond to various sleeves S having different sizes. As a result, for example, it is sufficient to prepare one type of support 140 for each of a plurality of types of sleeves S having different sizes. Therefore, it is possible to prevent the production efficiency of the beam 1 from being lowered. Therefore, the production efficiency of the beam 1 can be prevented from being lowered, and the displacement of the sleeve S can be efficiently prevented.

Although the embodiments have been described so far, the present invention is not limited to the above-described embodiments, and the present invention can be modified and changed based on its technical ideas.

DESCRIPTION OF SYMBOLS 1... Beam, 2... Opening, 2a... Periphery, 2b... Center axis, S... Sleeve, s1... Periphery 10, 50, 80, 100, 120, 130, 140... Sleeve support (support), 20 , 60... Annular body 20a... Central axis line 30, 70, 90, 150... One side sleeve receiver 31, 71, 91, 151... Support part 32, 72, 92, 152... Adjusting part 153... Engagement Part 154... Compression coil spring (biasing part) 110... Other side sleeve receiver 111... Support part 112... Adjustment part P... One side arrangement range p1, p2... One side boundary line p3... One side center line, Q: arrangement range on the other side, q1, q2: boundary line on the other side, q3: center line on the other side, θ1, θ2: angle

Claims (3)

When installing a sleeve that is arranged around an opening penetrating in the width direction of a reinforced concrete beam and has an outer peripheral portion that is formed corresponding to the peripheral edge of the opening in order to form the opening. A sleeve support configured to support the sleeve in
an annular body configured to be arranged so as to surround the periphery of the aperture;
a sleeve receiver formed to protrude from the annular body toward the inner peripheral side of the annular body,
The sleeve receiver
a support portion supported by the annular body;
an adjusting portion configured to be movable in a direction in which the sleeve receiver protrudes with respect to the supporting portion;
an engaging portion configured to be engageable with the adjustment portion;
a biasing portion configured to bias the engaging portion in a biasing direction from a distal end of the adjusting portion in a protruding direction toward a proximal end thereof;
The adjustment part has a tip section protruding from the support part toward the inner circumference of the ring-shaped body, and a plurality of tip sections projecting from the outer peripheral surface of the adjustment part and spaced apart from each other in the direction in which the adjustment part protrudes. a protrusion;
The engaging portion is attached to the support portion so as to be selectively engaged with one of the plurality of protrusions of the adjustment portion while being pressed in the urging direction by the urging portion. A sleeve support configured to be movable. In an installed state in which the annular body is arranged to surround the opening, the adjusting portion of the sleeve receiver is oriented such that its projecting direction is directed vertically and directly above or below the central axis of the opening. 2. The sleeve support of claim 1 , wherein the sleeve support is located at . comprising two said sleeve receivers,
In the two sleeve receivers, two boundary lines extending linearly from the central axis of the annular body toward the outer peripheral side of the annular body are aligned with each other in the circumferential direction of the annular body with the central axis of the annular body as a reference. It is located within an arrangement range that is set to be sandwiched at an angle of 110 degrees,
Further, the two sleeve receivers are located on both sides of a center line located in the middle between the two boundary lines in the circumferential direction of the annular body,
2. The method according to claim 1 , wherein the central line extends vertically upward or downward from the central axis of the aperture in an installed state in which the annular body surrounds the aperture. Sleeve support as described.

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