JP2018021406A - Concrete-embedded member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a rise of a manufacturing cost, to reduce the manufacturing cost, to suppress the immersion of liquid immersing from a clearance between a concrete structure and a concrete-embedded member from the outside of the concrete structure into the concrete structure, or to suppress the ooze-out of the liquid to the outside of the concrete structure from the clearance between the concrete structure and the concrete-embedded member.SOLUTION: A concrete-embedded member 1 has a cylindrical main body part 10, and a connecting part 20 arranged at the main body part 10, and connected to an interval holding member 100 while being screwed thereto. The main body part 10 comprises a flange part 11 which is arranged along a peripheral direction, protrudes to the outside, and is embedded in a construction structure 600.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a concrete burying member that is connected to a space holding member that holds a space between concrete form plates and supports the space holding member on the concrete form plate and at least a part of which is embedded in a concrete structure.

  Conventionally, a concrete structure is made through a process of laying a concrete form plate, placing concrete, curing, and demolding. In these series of steps, in order to prevent the deformation of the concrete mold plate, the interval holding member for holding the interval between the concrete mold plates and the interval holding member are connected to the concrete mold plate. And a cone for mounting. The spacing member and the cone are embedded in the concrete structure.

  Conventionally, in a concrete structure made using such a spacing member and a cone, a gap is generated between the spacing member and the cone embedded in the concrete structure and the concrete structure, and this gap is formed between the water channel and the concrete structure. As a result, water enters the inside of the concrete structure from the outside and corrodes metals such as spacing members, or water containing rust leaks from the inside of the concrete structure to the outside and the appearance of the concrete structure It was causing the harmful effect of damaging.

  On the other hand, in Patent Document 1, a water swelling agent layer is provided on the outer peripheral surface of a sleeve embedded in a concrete structure, and water such as rainwater entering a gap formed between the concrete structure and the sleeve is drained. A concrete embedding instrument is disclosed in which water is absorbed by the swelling agent layer, whereby the water swelling agent layer expands and exhibits a water stop function. Such a water swelling agent layer is provided by being applied or applied to the outer peripheral surface of the sleeve.

JP 2003-253882 A

  According to the inventor's study, gravel, stones, sand, and the like contained in the ready-mixed concrete move downward due to gravity during the curing period of the concrete structure, while moisture contained in the ready-mixed concrete causes the spacing member and the concrete burying. It moves upward to the position of the member, resulting in bleeding that separates the ready-mixed concrete. And when this water | moisture content evaporates, a clearance gap will be produced between a concrete structure, a space | interval holding member, and a concrete burying member. The gap caused by such bleeding is larger than the gap caused by the difference in coefficient of thermal expansion between the concrete structure and the concrete embedded member.

  A conventional concrete burying member does not have a water stop structure considering bleeding, and has a problem that it is necessary to reliably close a gap between a concrete structure generated by bleeding and the concrete burying member.

  In addition, the device disclosed in Patent Document 1 requires an operation process for applying a water swelling agent layer, which causes an increase in manufacturing cost, and uses a water swelling agent having high water absorption and bleeding. Since it is necessary to use many water swelling agents in order to close the generated gap, there is a problem that the cost of the product is increased.

  It is an object of the present invention to suppress an increase in manufacturing cost and to reduce the cost, and to allow liquid that enters the gap between the concrete structure and the concrete embedded member from the outside of the concrete structure to the concrete. A concrete burying member that can be prevented from entering the inside of the structure, or can prevent liquid from oozing out of the concrete structure from the gap between the concrete structure and the concrete burying member. Is to provide.

  A concrete embedding member according to the present invention is connected to a spacing member that retains the spacing of a concrete mold plate so that the spacing member is supported by the concrete mold plate and at least a part thereof is buried in a concrete structure. A concrete embedding member having a cylindrical main body portion and a connection portion provided on the main body portion and screwed to and connected to the spacing member, the main body portion extending along a circumferential direction It is provided with a collar portion that protrudes outward and is embedded in the concrete structure.

  Without using a material having a high water absorption property, the gap generated around the main body is blocked by the buttock so that the liquid flowing through the gap is blocked by the buttock.

  According to the present invention, an increase in manufacturing cost can be suppressed and the cost can be reduced, and the liquid that enters the gap between the concrete structure and the concrete burying member from the outside of the concrete structure is supplied to the concrete. The inside of the structure can be prevented from entering, or the liquid can be prevented from exuding to the outside of the concrete structure from the gap between the concrete structure and the concrete burying member.

It is a perspective view of the concrete embedding member which concerns on embodiment of this invention. It is sectional drawing of the concrete embedding member which concerns on embodiment of this invention. It is a figure which shows the usage method of the concrete embedding member which concerns on embodiment of this invention. It is a front view of the concrete structure with which the concrete burying member concerning the embodiment of the present invention was laid. It is sectional drawing of the concrete structure by which the concrete embedding member which concerns on embodiment of this invention was embed | buried. It is a side view of the 1st modification of the concrete embedding member which concerns on embodiment of this invention. It is a side view of the 2nd modification of the concrete embedding member which concerns on embodiment of this invention.

  Hereinafter, a concrete embedding member according to an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the figure, the x-axis, y-axis, and z-axis form a three-axis orthogonal coordinate system. The positive direction of the y-axis is the forward direction, the negative direction of the y-axis is the backward direction, the x-axis direction is the left-right direction, and the z-axis is A description will be given assuming that the positive direction is upward and the negative direction of the z-axis is downward.

<Construction of concrete buried member>
The configuration of the concrete embedding member 1 according to the embodiment of the present invention will be described in detail below with reference to FIGS. 1 and 2. In addition to the concrete embedding member 1, FIG. 2 shows the spacing member 100, the water stop ring 200, and the embedding plug 300. Moreover, in FIG. 2, only the concrete embedding member 1 is described with sectional drawing for convenience of explanation.

  The concrete embedding member 1 is connected to a spacing member 100 that holds the spacing between the concrete mold plates to support the spacing member 100 on the concrete mold plate, and at least a part thereof is buried in the concrete structure. 10 and the connecting portion 20.

  The main body 10 has a cylindrical shape extending in the front-rear direction, and is attached to a concrete mold plate. The main body 10 is typically made of a composite resin. Here, the composite resin forming the main body 10 is exemplified by a resin composed of carbon fiber, glass fiber, and nylon resin. The main body portion 10 includes a flange portion 11, an insertion hole 12, and an inclined surface 13.

  The collar portion 11 is provided integrally with the main body portion 10, is provided along the circumferential direction of the main body portion 10, and protrudes laterally from the main body portion 10. The protruding length of the flange portion 11 from the main body portion 10 is a length that can block a gap generated between the main body portion 10 and the concrete structure by bleeding. The protruding length of the flange portion 11 from the main body portion 10 is typically longer than 2 mm between the main body portion 10 and the concrete structure due to bleeding.

  The flange portion 11 is composed of a plurality of flange portions 11 a, 11 b, 11 c provided at equal intervals in the front-rear direction of the main body portion 10. The flange portions 11a, 11b, and 11c may be provided at different intervals in the front-rear direction of the main body portion 10, respectively.

  The eaves part 11a is provided in front of the eaves part 11b, and is provided in a position away from the front end part, which is an end part in the attaching direction of the main body part 10 with respect to the concrete formwork plate. The collar part 11b is provided behind the collar part 11a and is provided in front of the collar part 11c. The collar part 11 c is provided behind the collar part 11 a and the collar part 11 b and is provided at the rear end of the main body part 10. The flange part 11a, the flange part 11b, and the flange part 11c have a shape in which the tips in the protruding direction are pointed toward the protruding direction.

  The insertion hole 12 has a front end open to the outside and a rear end communicating with the through hole 23 of the connection portion 20. A shaft foot bolt or an embedded plug 300 (not shown) is press-fitted into the insertion hole 12.

  The inclined surface 13 is provided at the front end of the inner wall of the insertion hole 12 and is inclined so that the inner diameter of the insertion hole 12 gradually increases toward the front.

  The connecting portion 20 is provided at the rear end of the main body portion 10 and is attached to the main body portion 10 by integral molding. The surface of the connection part 20 is covered with a rust prevention layer. Here, the antirust layer is exemplified by an epoxy resin. The connecting portion 20 is made of metal and can be connected to the spacing member 100. In addition, the connection part 20 does not need to be covered with the antirust layer. Further, the connecting portion 20 may be provided by being press-fitted into the rear end of the main body portion 10.

  The connecting portion 20 includes a flange portion 21, an internal screw portion 22, and a through hole 23.

  The flange portion 21 is provided at the front end of the connection portion 20, is provided along the circumferential direction, and is provided so as to protrude outward to the side. The flange portion 21 is in contact with the front end of the flange portion 11c.

  The inner screw portion 22 can be screwed with the outer screw portion 101 of the spacing member 100.

  The through hole 23 is provided so as to penetrate the connecting portion 20 in the front-rear direction and communicates with the insertion hole 12 of the main body portion 10. An inner screw portion 22 is formed on the inner wall of the through hole 23.

  The water stop ring 200 is press-fitted into the interval holding member 100 and stops the liquid flowing through the gap generated around the interval holding member 100. The embedded plug 300 is formed of a material having a predetermined elastic force and is press-fitted into the insertion hole 12.

<Usage method of concrete embedded member>
The method for using the concrete burying member 1 according to the embodiment of the present invention will be described in detail below with reference to FIGS. 3 to 5.

  3, FIG. 3 (a) is a side view of the state before connecting the spacing member 100 to the concrete burying member 1, and FIG. 3 (b) shows the concrete burying member 1 attached to the concrete mold plate 400. FIG. 3 (c) is a side view of the state, and FIG. 3 (c) is a sectional view of the state in which the concrete form plate 400 is removed and the embedding plug 300 is attached to the concrete embedding member 1 after the concrete is hardened. It is sectional drawing of a state. In FIG. 3, the description of the water stop ring 200 is omitted, but the water stop ring 200 may not be provided.

  First, as shown in FIG. 3A, the outer screw portion 101 of the spacing member 100 is screwed into the inner screw portion 22 of the connecting portion 20 of the concrete embedding member 1, and the concrete is attached to both ends of the spacing member 100. The embedded member 1 is connected.

  Next, as shown in FIG. 3 (b), a through hole 401 for allowing the shaft foot bolt 500 to penetrate the concrete mold plate 400 is formed.

  Next, the shaft foot bolt 500 is passed through the through-hole 401 formed in the concrete mold plate 400 so that one end of the shaft foot bolt 500 protrudes from the outer surface of the concrete mold plate 400 to the outside. The other end of 500 is press-fitted into the insertion hole 12 of the main body portion 10 of the concrete embedding member 1, and the concrete embedding member 1 is attached to the concrete mold plate 400. Thereby, the concrete embedding member 1 and the space | interval holding member 100 can hold | maintain the space | interval of the concrete formwork board 400. FIG.

  Next, as shown in FIG. 3B, ready-mixed concrete is poured between the concrete mold plates 400.

  Next, as shown in FIG. 3C, when the ready-mixed concrete poured between the concrete mold plates 400 is hardened to form the concrete structure 600, the shaft foot bolts 500 and the concrete mold plates are formed. Remove 400. As a result, the front end of the insertion hole 12 is opened to the outside.

  Next, the embedding plug 300 is press-fitted into the insertion hole 12 of the main body 10 of the concrete embedding member 1 using the jig 700, and the construction shown in FIG. 3D is completed. By forming the embedded plug 300 from a material having a predetermined elastic force, the embedded plug 300 can be easily inserted into the insertion hole 12 and the adhesion of the embedded plug 300 to the inner wall of the insertion hole 12 is good. Therefore, it is possible to prevent liquid from entering the insertion hole 12.

  By providing the flange portion 11a behind the front end of the main body portion 10, the flange portion 11a is not exposed to the outer surface of the concrete structure 600 after the completion of construction as shown in FIG. Even if the outer surface of the object 600 is somewhat broken, it is not exposed to the outer surface of the concrete structure 600. Thereby, it is possible not to expose the flange portion 11a on the outer surface of the concrete structure 600, and to prevent the appearance of the concrete structure 600 from being impaired.

  The concrete structure 600 creates a gap between the concrete embedding member 1 and the concrete structure 600 by bleeding. By blocking the gap with the flange 11a, the flange 11b, and the flange 11c, a gap P1, a gap P2, and a gap P3 are generated between the lower end of the main body 10 and the concrete structure 600 as shown in FIG. . Here, the gap P1 is a gap generated in front of the flange 11a, the gap P2 is a gap generated between the flange 11a and the flange 11b, and the gap P3 is a gap between the flange 11b and the flange 11c. It is a gap created between them.

  In this state, when a liquid such as rainwater enters the gap P1 from the outside, the liquid that is about to flow from the gap P1 to the gap P2 is blocked by the flange portion 11a, and the liquid flowing backward from the flange portion 11a is blocked. Intrusion can be prevented. Thereby, corrosion of metals, such as the space | interval holding member 100, by the liquid which penetrate | invaded the clearance gap P1 from the outside can be suppressed. Further, it is possible to prevent the concrete structure 600 from being cracked or peeled off due to expansion due to corrosion of metals.

  Further, when the liquid oozes out from the inside of the concrete structure 600 into the gap P2, the liquid that tries to flow from the gap P2 to the gap P3 is blocked by the flange portion 11b, and the liquid flows backward from the flange portion 11b. Intrusion of the liquid can be prevented, and the liquid about to flow from the gap P2 to the gap P1 is blocked by the flange 11a, so that the liquid can be prevented from exuding further forward than the flange 11a. Thereby, corrosion of metals, such as the spacing member 100, caused by the liquid that has oozed into the gap P2 can be suppressed, and cracking or peeling off of the concrete structure 600 due to expansion due to corrosion of the metals can be prevented. it can. In addition, it is possible to prevent the appearance of the concrete structure 600 from being damaged by the liquid containing rust and the like that has oozed into the gap P2 oozing out to the outer surface of the concrete structure 600.

  Further, when moisture oozes out from the inside of the concrete structure 600 into the gap P3, the liquid that tries to flow from the gap P3 to the gap P4 is blocked by the flange 11c, and the liquid flows backward from the flange 11c. Intrusion of liquid can be prevented, and the liquid that is about to flow from the gap P3 to the gap P2 is blocked by the flange 11b, so that the liquid can be prevented from exuding further forward than the flange 11b. Thereby, it is possible to prevent the liquid including rust and the like that has oozed into the gap P3 from being oozed out on the outer surface of the concrete structure 600 and thereby impairing the appearance of the concrete structure 600. Moreover, corrosion of metals, such as the space | interval holding member 100, by the liquid which oozes out to the clearance gap P3 can be suppressed, and it can prevent that the concrete structure 600 is cracked or peeled off by expansion | swelling by corrosion of metals. .

  The tips of the flanges 11a, 11b, and 11c in the protruding direction and the concrete structure are formed by sharpening the tips of the flanges 11a, 11b, and 11c in the protruding direction. When a gap is generated by bleeding from the gap 600, the length of the gap in the front-rear direction can be made extremely small. Therefore, the amount of liquid in the gap and the gap to the gap P1, the gap P2, or the gap P3 The amount of liquid flowing in can be minimized. Moreover, the liquid of the clearance gap P1, the clearance gap P2, or the clearance gap P3 is made into the shape which sharpened the front-end | tip of the protrusion direction of the collar part 11a, the collar part 11b, and the collar part 11c toward the protrusion direction, and the collar part 11a, the collar part It takes time to cross 11b or flange 11c, and penetrates into concrete structure 600 before exceeding flange 11a, flange 11b or flange 11c, so that it penetrates into the interior of concrete structure 600. It is possible to prevent oozing out of the concrete structure 600.

  As described above, according to the present embodiment, the cylindrical main body portion 10 and the connection portion 20 that is provided on the main body portion 10 and is screwed into and connected to the interval holding member 100 are provided. By providing the flange 11 provided along the circumferential direction and projecting outward and embedded in the concrete structure 600, an increase in manufacturing cost can be suppressed and the cost can be reduced. Moisture that enters the gap between the concrete structure and the concrete embedded member from the outside of the object can be prevented from entering the inside of the concrete structure, or between the concrete structure and the concrete embedded member It is possible to prevent moisture from oozing out of the concrete structure through the gap.

  Further, according to the present embodiment, the surface of the connecting portion 20 is covered with the rust prevention layer, thereby suppressing the liquid containing rust from leaking into the gap between the concrete structure 600 and the concrete burying member 1. be able to.

  Further, according to the present embodiment, the main body portion 10 is formed of a resin such as a composite resin, so that the strength can be increased as compared with the case of forming the main body portion 10 with ceramic or mortar, and it is inexpensive and can be mass-produced. Therefore, the productivity can be improved and the weight can be reduced, so that the workability during construction can be improved.

  In addition, according to the present embodiment, by preventing the liquid containing rust that oozes into the gap between the concrete structure and the concrete burying member from leaking to the outer surface of the concrete structure at the flange portion 11, Even when the length of the main body 10 in the front-rear direction is shortened compared to the conventional case, it is possible to prevent the liquid containing rust from leaking out to the outer surface of the concrete structure. Further, the length of the main body 10 in the front-rear direction can be shortened and reduced in size compared to the conventional one, and the cost can be reduced.

  Moreover, according to this embodiment, the strength of the collar part 11 can be improved by providing the collar part 11 integrally with the main body part 10 as compared with the case where the main body part and the collar part are separated. In addition, construction can be facilitated.

  Moreover, according to this embodiment, the protrusion length from the main body part 10 of the collar part 11 is made into the length which can block the gap which arises between the main body part 10 and a concrete structure by bleeding. It is possible to prevent the liquid flowing through the gap generated by bleeding from entering the inside of the concrete structure, or the liquid flowing through the gap generated by bleeding from exuding from the inside of the concrete structure to the outside.

  In the present invention, the type, arrangement, number, and the like of the members are not limited to the above-described embodiments, and the constituent elements thereof are appropriately replaced with those having the same effects and the like, without departing from the spirit of the invention. Of course, it can be changed appropriately.

  Specifically, in the above-described embodiment, the tips of the protruding portions of the flange portion 11a, the flange portion 11b, and the flange portion 11c are pointed toward the protruding direction, but the flange portion 11d, the flange portion 11e, and the flange portion 11f are formed. As shown in FIG. 6, the tip in the protruding direction may be curved so that the thickness decreases in the protruding direction. By projecting the tips in the protruding direction of the flange portion 11d, the flange portion 11e, and the flange portion 11f so that the thickness decreases toward the protruding direction shown in FIG. It is possible to obtain the same effect as when the shape is sharpened in the protruding direction. The configuration of the concrete embedded member 1a and the main body portion 10a shown in FIG. 6 is the same as that of the concrete embedded member 1 and the main body portion 10 except for the flange portion 11d, the flange portion 11e, and the flange portion 11f. Is omitted.

  Moreover, in the said embodiment, although the front-end | tip of the protrusion direction of the collar part 11a, the collar part 11b, and the collar part 11c was made into the shape sharp toward the protrusion direction, as shown in FIG. 7, the collar part 11g and the collar part 11h And you may make the outer peripheral side surface of the collar part 11i flat along the front-back direction. In addition, since the structure of the concrete burying member 1b and the main-body part 10b shown in FIG. 7 is the same structure as the structure of the concrete burying member 1 and the main-body part 10 except the collar part 11g, the collar part 11h, and the collar part 11i, the description Is omitted.

  Moreover, in the said embodiment, although the three collar parts were provided in the main-body part, you may provide multiple other than one or three collar parts in a main-body part.

  Moreover, in the said embodiment, although the shape of the front-end | tip of the protrusion direction of the collar part 11a, the collar part 11b, and the collar part 11c was made into the same shape, some of the collar parts 11a, the collar part 11b, and the collar part 11c are used. You may make the shape of the front-end | tip of a protrusion direction different from the shape of the front-end | tip of the other protrusion direction among the collar part 11a, the collar part 11b, and the collar part 11c.

  Further, in the above-described embodiment, the shape in which the tip in the protruding direction of the buttock is pointed in the protruding direction, the shape in which the tip in the protruding direction of the buttock is curved so as to be thin, or the outer peripheral side surface of the buttock Flattened along the direction, but the tip of the buttock protruding direction is pointed toward the protruding direction, the tip of the buttock protruding direction is curved so that the thickness is thin, or the outer peripheral side surface of the buttock It can be made into shapes other than flattening along the front-back direction.

  Moreover, in the said embodiment, although the main-body part 10 was formed with composite resin, you may form the main-body part 10 with one type of resin. As one kind of resin, AES resin, ASA resin, ABS resin, etc. are illustrated here.

  Moreover, in the said embodiment, the liquid which flows into the insertion hole 12 from the concrete structure 600 through the through-hole 23 near the center part of the front-back direction of the internal thread part 22 of the connection part 20, or the through-hole 23 from the insertion hole 12 A water blocking wall may be provided to stop liquid entering the concrete structure 600 through the water.

  In the above embodiment, the flange portion 11 is provided integrally with the main body portion 10, but the main body portion and the flange portion are formed as separate bodies, and the flange portion is attached to the main body portion by press-fitting or bonding. May be.

  Moreover, in the said embodiment, although the main-body part 10 was formed with resin, such as a composite resin, you may form with materials other than resin, such as a ceramic or mortar.

  Moreover, in the said embodiment, although the collar part 11 was provided in the perimeter along the circumferential direction of the main-body part 10, a collar part is provided from the side to the downward direction along the circumferential direction of the main-body part 10, and the collar is upward. The portion may not be provided. Even if it is this structure, when bleeding arises, it can stop reliably with the collar part formed from the side to the downward | lower direction.

  Moreover, in the said embodiment, although the concrete embedding member 1 was attached to the concrete formwork board 400, other members are interposed between a concrete embedding member and a concrete formwork board, and a concrete embedding member is made into a concrete formwork board. It may be supported.

  INDUSTRIAL APPLICABILITY The present invention is suitable for a concrete burying member that is connected to a space holding member that holds a space between concrete mold plates and supports the space holding member on the concrete mold plate and at least a part of which is embedded in a concrete structure. .

DESCRIPTION OF SYMBOLS 1 Concrete embedding member 10 Main-body part 10a Main-body part 11 ridge part 11a ridge part 11b ridge part 11c ridge part 11d ridge part 11e ridge part 11f ridge part 11g ridge part 11h ridge part 11i ridge part 12 insertion hole 13 inclined surface 20 connection part 21 Flange portion 22 Internal screw portion 23 Through hole 100 Spacing holding member 101 External screw portion 200 Water stop ring 300 Embedded plug 400 Concrete mold plate 401 Through hole 500 Bolt for shaft leg 600 Concrete structure 700 Jig

Claims (5)

A concrete burying member connected to a spacing member that holds the spacing of the concrete mold plate and supporting the spacing member on the concrete mold plate and at least a part of which is buried in the concrete structure;
A cylindrical main body extending in the front-rear direction;
A connecting portion provided at a rear end of the main body portion and screwed to and connected to the spacing member;
Have
The main body is
Provided along the circumferential direction and projecting outward, comprising a collar portion embedded in the concrete structure;
A concrete embedded member characterized by that. The buttocks
The tip in the protruding direction has a sharp shape toward the protruding direction or a curved shape so that the thickness is thin.
The concrete burying member according to claim 1. The buttocks
Provided integrally with the main body,
The concrete embedding member according to claim 1 or 2, characterized by the above. The main body is
Formed of resin,
The concrete embedding member according to any one of claims 1 to 3, wherein The main body is
Attached to the concrete formwork plate,
The buttocks
Provided at a position away from the end of the main body portion in the mounting direction with respect to the concrete formwork plate,
The concrete embedding member according to any one of claims 1 to 4, wherein the member is embedded in concrete.

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