WO1995013436A1 - Dispositif encastre dans du beton - Google Patents

Dispositif encastre dans du beton Download PDF

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Publication number
WO1995013436A1
WO1995013436A1 PCT/JP1994/001893 JP9401893W WO9513436A1 WO 1995013436 A1 WO1995013436 A1 WO 1995013436A1 JP 9401893 W JP9401893 W JP 9401893W WO 9513436 A1 WO9513436 A1 WO 9513436A1
Authority
WO
WIPO (PCT)
Prior art keywords
concrete
insert
projection
main body
mold
Prior art date
Application number
PCT/JP1994/001893
Other languages
English (en)
Japanese (ja)
Inventor
Etsuji Oike
Original Assignee
Oike Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oike Co., Ltd. filed Critical Oike Co., Ltd.
Publication of WO1995013436A1 publication Critical patent/WO1995013436A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
    • E04B1/4114—Elements with sockets
    • E04B1/4121—Elements with sockets with internal threads or non-adjustable captive nuts

Definitions

  • the present invention relates to an insert, a sleeve, an insert holder buried together with the insert, or an insert buried in the concrete product, or inserted into the opening of the insert to form a mold. It relates to a concrete buried object having a cylindrical body such as a plug to be mounted. Background art
  • Inserts should be buried in advance for concrete boxes, such as handholes used when burying electric wires in the ground and common trenches for burying gas and water in common. Many. These inserts are used for installing cable racks and pipe racks.
  • Fig. 24 shows an example of a method that has been conventionally adopted when inserting an insert into a formwork and burying it in a box.
  • the insert 6 is formed by screwing the bolt 5 inserted from the back of the outer mold 1 or the inner mold 3 into the insert 6. Attach in place. Therefore, it is necessary to make a hole larger than the inner diameter of the insert so that the setting bolt 5 can be passed through the formwork 1 or 3 where the opening of the insert 6 is located.
  • inserts 6 are installed from the surface of formwork 1 or 3, and inserts are set by inserting bolts 5 from the backside. One person cannot install the insert.
  • FIG. 26 shows the boss 4 and the hollow plug 7 on an enlarged scale.
  • the plug 7 is screwed into the opening of the insert for the boss 4 that has been screwed in place in the mold beforehand, and the plug 7 is inserted into the boss 4 to set the insert 6 .
  • the plug 7 is removed from the boss 4 with the plug 7 still attached to the insert 6.
  • remove the plug 7 attached to the insert 6 by operating the groove 7d provided on the bottom with a jig such as a screwdriver.
  • a male thread 7b corresponding to the female thread of the insert 6 is provided on the outer peripheral surface of the body 7a of the plug 7, and the plug body 7a is hollow so that it can be fitted into the boss 4. ing.
  • a portion 7c where the groove 7d is provided protrudes from the back of the main body 7a.
  • the insert 6 is set on the form using the boss 4 and the plug 7 as described above, even one worker can set the insert at a predetermined position on the form. There is no need to remove the boss when performing the operation, so less work is required. However, this method must be removed in the direction in which the boss 4 extends, and therefore can be applied only to a formwork that is removed perpendicular to the surface of the concrete product, such as the base plate 8. .
  • the boss and the concrete product are not suitable for the formwork that turns and removes like the outer formwork 1 or the formwork that slides on the inner surface of the concrete product when removing it like the inner formwork 3. Because of the interference, you cannot set up an insert with such a boss.
  • Providing a large hole in a durable mold to penetrate a thick bolt as described above has a problem in securing the dimensional accuracy of the mold.
  • the formwork tends to be distorted or uneven, and the inner formwork cannot be removed smoothly, or the concrete box The dimensional accuracy of is deteriorated.
  • the work of closing the hole formed in the formwork by welding to change the mounting position of the insert also causes distortion or the like in the formwork, so that the same problem as described above occurs. Repairing is difficult for a formwork that removes a concrete product by sliding it on the inner surface, such as the inner formwork 3, because particularly high precision is required.
  • a concrete buried object that can be easily set on a formwork by one worker without using a setting bolt or a boss is provided, and furthermore, a concrete buried object is provided as it is.
  • the purpose is to provide concrete buried objects that can be removed from the frame. Whether removing the formwork by sliding the formwork like the inner formwork, or removing the formwork by swiveling it, there is no impact on the concrete product and the component without any buried objects It is also self-sufficient to provide concrete buried objects that can be removed with the same effort as for concrete products.
  • the diameter of the hole preliminarily formed in the formwork for setting the concrete buried object of the present invention is reduced to prevent the formwork from being distorted, and to change the position of the buried object. It also aims to provide concrete buried objects that can be easily constructed. Since such concrete buried objects are buried for each concrete product, the purpose is to provide them at low cost.
  • the concrete product having the concrete buried object of the present invention can be manufactured in a short period of time and with as little labor as possible, and the cost associated therewith is reduced. Be able to ship. Disclosure of the invention
  • a thin resin protrusion protruding to the opposite side of the body. If one or a plurality of protrusions are provided, the concrete buried object can be set in the mold by inserting these protrusions into holes formed in the mold. When setting, the projection can be inserted into the hole of the formwork from one side of the formwork. In addition, since the setting hole opened at a predetermined position of the formwork is used, the embedding position does not change.
  • the setting hole to be formed in the formwork may have a small diameter corresponding to the protrusion, no distortion occurs in the formwork when the hole is formed. Furthermore, if the hole has a small diameter, even if no concrete buried object is set in the hole, there is no leakage of the concrete, and there is no leakage of the concrete to the surface of the concrete product. No effect. For this reason, these holes do not have to be closed by welding or the like, and even for a durable formwork, the setting holes can be easily changed, and the position of a concrete buried object can be flexibly changed. Can respond.
  • the center of the protrusion should be placed outside this opening.
  • a projection with a diameter smaller than the opening can be installed.
  • a protrusion can be projected from the flanged surface, and the flanged surface can be tightly attached to the inner surface of the mold to prevent entry of concrete.
  • the flange surface and the formwork can be formed. Even if there is a gap between them, the intrusion of concrete can be prevented. If the other end of the concrete buried object is also open so that the buried insert can be inserted, the end with the protrusion is closed with a thin film, so that the connection to the buried insert can be made. It is possible to completely prevent the intrusion of the cartridge.
  • one end of the main body on which the projection is provided is closed, and a substantially flat surface that contacts the inner surface of the formwork If the setting surface is provided, it is possible to provide a thin projection without being affected by the diameter and configuration of the main body inserted into the buried insert, or to appropriately arrange them.
  • the main body side inserted into the insert becomes hollow with the side opposite to the protrusion protruding, and molding with resin becomes easy.
  • this plug If this plug is to be screwed into the insert, retract the-part of the setting surface to the inside of the main body so that the jig can be inserted into that part when removing the plug from the insert. It is desirable to keep it. Since the setting surface is exposed on the surface of the concrete product, it is easy to operate with a jig. Similarly, if a seal is provided along the edge of the setting surface to prevent the intrusion of concrete, the concrete does not go around the setting surface and the setting surface is clear. In addition, it appears on the surface of concrete products, and the parts to be operated are not buried with concrete.
  • the protrusion is cut from this connection.
  • the vicinity of the connection portion may be made thicker toward the tip of the protrusion, or a dent or cut may be provided in the connection portion.
  • a projection that fits into the setting hole or a projection that is substantially elastically deformed in accordance with the setting hole can be adopted.
  • the main body can be set to the mold by simply inserting the protrusion into the setting hole.
  • the projection is inserted substantially elastically according to the shape of the setting hole, that is, with elastic deformation and some plastic deformation, the main body is formed by the elastic force or frictional force.
  • the property of being substantially elastically deformed can be obtained not only from the properties of the material but also from the cross-sectional shape of the projection, such as extending a plurality of ribs from the columnar portion in the radial direction.
  • the cross-sectional shape of the projection such as extending a plurality of ribs from the columnar portion in the radial direction.
  • projections such as crescent-shaped, half-moon-shaped, star-shaped, and polygonal projections, and projections that periodically repeat irregularities in the radial direction or the longitudinal direction of the projections.
  • the substantially elastically deformable pillar part penetrates the setting hole and appears on the back side of the formwork, the part tries to return to the original form, so it presses on the backside of the formwork and is even higher Adhesive force can be obtained.
  • the main body is set to the mold by pressing the mold from the back side with the spread part. Adhesive force can be obtained.
  • the protrusion is cut during removal from the mold, if the portion that is in contact with the back of the mold is thicker toward the tip, the cut portion of the protrusion is pulled toward the back of the mold, Easy to remove.
  • the contact force can be obtained by providing these protrusions with a diameter, a shape, and an appropriate number of protrusions.
  • a sheath tube or the like can be provided on the back surface of the mold to lengthen the setting hole to increase the adhesive force with the projection. Furthermore, even if multiple protrusions are inserted into the setting hole and the inner surface of the setting hole or the back surface of the mold is pressed so that the mold is sandwiched by the plurality of protrusions, the main body is set to the mold. Is obtained.
  • these projections may be inserted into setting holes that have been opened in the mold in advance, they do not need to have a spire shape like a needle.
  • the tips of the projections be non-spirated, such as semicircular or hemispherical.
  • the projection be gradually tapered toward the tip.
  • FIG. 1 is a developed view showing a state in which an insert is set on a mold using the insert holder according to the first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing the configuration of the insert holder shown in FIG.
  • FIG. 3 is a side view showing a state in which an insert is set on a mold using the insert holder shown in FIG. 1 with a partial cross section.
  • FIG. 4 is a side view showing, with a partial cross section, a state in which the concrete product in which the insert holder shown in FIG. 1 is embedded is removed.
  • FIG. 5 is a diagram showing a state in which a member for closing the opening of the insert holder shown in FIG. 4 is removed.
  • FIG. 6 is an exploded view showing a manner in which a hexagonal nut insert is set on a form using the insert holder of a different example according to the first embodiment. ⁇ & ⁇
  • FIG. 7 is a side view showing, with partial cross sections, a state in which the projection of the insert holder shown in FIG. 6 is set and a state in which the projection is cut off.
  • FIG. 8 is a side view showing an example of a different projection using a partial cross section.
  • FIG. 9 is a perspective view showing an insert according to the second embodiment of the present invention.
  • FIG. 10 is an enlarged perspective view of the protrusion shown in FIG.
  • FIG. 11 is a developed view showing a state in which the insert shown in FIG. 9 is set in a formwork.
  • FIG. 12 is a side view showing, using a partial cross section, a state in which the concrete product in which the insert shown in FIG. 9 is embedded is removed.
  • FIG. 13 is a perspective view showing a different example of the insert according to the second embodiment of the present invention.
  • FIG. 14 is an enlarged perspective view showing the protrusion of FIG.
  • FIG. 15 is a diagram showing the relationship between the protrusions shown in FIG. 13 and the setting holes.
  • FIG. 16 is a cross-sectional view showing a configuration of a sleeve according to the third embodiment of the present invention.
  • FIG. 17 is a schematic view of a concrete product in which the sleeve shown in FIG. 16 is embedded. It is sectional drawing which shows a mode that it molds.
  • FIG. 18 is a perspective view and a sectional view showing a plug according to a fourth embodiment of the present invention.
  • FIG. 19 is a developed view showing a state where an insert is set in a mold using the plug shown in FIG.
  • FIG. 20 is a side view showing, with a partial cross section, the removal of a concrete product with embedded inserts using the plug shown in Fig. 18.
  • FIG. 4 is a diagram showing a state in which a plug is removed from an embedded insert. 1 c
  • FIG. 22 is a perspective view and a sectional view showing a modified example of the plug according to the fourth embodiment of the present invention.
  • FIG. 23 is a diagram showing a state in which the plug shown in FIG. 22 is removed from the inserted insert.
  • FIG. 24 is a cross-sectional view illustrating a conventional insert setting method.
  • FIG. 25 is an enlarged view of a part of FIG.
  • Fig. 26 is an exploded view showing a conventional method of setting an insert using a plug.
  • FIG. 1 shows an embodiment of the present invention in which an insert holder 6 is used to set a buried insert 6 in a formwork 40.
  • FIG. 2 shows the structure of the insert holder 10 according to the present invention using a cross section.
  • the insert holder 10 of this example has a cylindrical main body 11 having both ends open, and a flange-like shape extending from the main body to the outer peripheral side with one opening 14 as a center.
  • a flange section 16 is provided. From the opening 13 at the other end of the main body 11, the insert 6 can be fitted and held, and a few streaks that protrude slightly into the inner surface of the insert 6 so that a slight difference in outer diameter can be absorbed.
  • the insert holder 10 is integrally formed of a resin such as polypropylene, reinforced polyethylene, or ABS, and the strength can be increased by adding glass fiber or the like depending on the application. These materials have some degree of elasticity to some extent, and if the inner surface of the holding side 13 is provided with a mountain 13a, the outer diameter of the insert 6 and the inner diameter of the holding side 13 will be reduced. The insert 6 can be reliably held even if there is a slight difference between the two.
  • a resin such as polypropylene, reinforced polyethylene, or ABS
  • the inside of the body 1 1 is hollow, and the side facing the formwork, that is, the setting side 1
  • the inner diameter of the opening 14 is slightly smaller than the inner diameter of the main body 11 so that the end of the insert 6 does not protrude from 5.
  • the end of the insert inserted into the holding side 13 is covered by the insert holder 10 and is not exposed on the surface of the concrete product.
  • the insert holder 10 of this example not only serves to set the insert in the formwork, but also protects the end of the metal insert from ivy, so that it can be It also protects the surface of concrete products from contamination. .
  • a substantially flat surface 17 is formed by the flange portion 16 and this surface 17 is in contact with the inner surface 40a of the form 40, so that the insert 6 can be set perpendicular to the form. In addition, the intrusion of concrete can be prevented. For this reason, the above-mentioned elastic synthetic resin is suitable for forming the flange portion 16.
  • the flange portion 16 does not need to be disk-shaped as in this example, but may be polygonal. Alternatively, if the wall thickness of the setting side 15 of the main body 11 is to some extent, a flat surface 17 can be obtained within the thickness range.
  • a thin film seal 31 is inserted between the flange surface 1 1 and the mold surface 40a.
  • the seal 31 is made of a foamed plastic such as a polyurethane foam cut in a ring shape, and has a thickness of about 0.5 to 2 mm. It is. Seal 3
  • the opening 14 extending from the insert 6 is closed by a thin-film member 32 extending from the main body 11 to almost completely prevent the intrusion of concrete into the insert. ing.
  • the sealing member 3 2 ′ of this thin film is It is supported by a beam 3 2a from the side, closing the entire opening 14. After removal from the mold, the closing member 32 prevents entry of dust and rainwater into the insert. When using an insert, this member 32 can be easily removed with a pair of pliers.
  • Three projections 20 project from the surface 17 of the flange portion 16 to the opposite side of the body 11 substantially perpendicular to the flange surface 17. These three projections 20 are centered outside the opening 14 and are evenly spaced along the periphery of the opening 14. Therefore, these protrusions 20 do not interfere with the opening 14, and the cuts of these protrusions 20 or the protrusions do not hinder the use of the insert 6.
  • the diameter of the projection 20 does not need to be adjusted to the inner diameter of the opening 14, and the shape can be freely selected.
  • the insert can be used through the inside of the projection, but since the diameter of the projection is large, the diameter of the setting hole to be opened in the mold will be equal to or larger than before. .
  • the projections 20 are disposed away from the openings 14, the projections do not need to be hollow, and the diameters do not need to match the openings 14. Therefore, in this example, a plurality of thin projections 20 having the following shapes are provided. The number of the projections 20, the shape of the projection, or the cross-sectional shape can be appropriately selected according to the buried object in consideration of the required adhesive force and the like.
  • the projections 20 of the present example are composed of four ribs 25 each extending in the radial direction from the central axis 24, and these form the projections 20 extending in a columnar shape as a whole.
  • the projection has an outer diameter of about 5 mm as a whole and protrudes about 12 mm from the flange surface 17.
  • these projections 20 are arranged such that their central axes 24 are equally spaced along the periphery of the opening 14.
  • Each rib 25 is generally flanged
  • the connecting part 27 connected to the surface 17 gradually narrows toward the tip 23, and the tip 23 of the rib 25 is rounded so that the tip of the projection 20 is not sharp. It is processed into a shape.
  • the width of the rib 25 slightly increases toward the tip 23, contrary to the vicinity of the tip, and the cross-sectional area near the connection portion 27 is reduced to be closer to the surface 17
  • the strength of the part is slightly reduced.
  • the width of the rib is increased from the connection portion 27 to a length approximately equal to the thickness of the form 40, for example, at a point 25a where the head is approaching the tip 23 by about 3.2 mm.
  • this portion 25a reaches the rear surface 40b of the mold 40 and spreads out, so that the rear surface 40b can be pressed to pull the protrusion 20.
  • the width of the projections 2 in this example is also increased by 25 b.
  • the width corresponding to a formwork having a different thickness is again increased by at least 2 mm. It is a shape that can be set for any type of formwork.
  • the protrusion length is about 6 mm or more. If it is sufficient to have a small thickness, the length may be approximately the same as the thickness of the mold.
  • the insert 6 is large and a large load is applied, for example, when injecting concrete, increase the diameter of the projection 20 or add a sheath tube or the like to the setting hole 41 to add the projection 2. It is also possible to increase the adhesion area between 0 and the setting hole 41.
  • the length of the protrusion 20 can be selected according to the condition of the mold, such as a sheath tube.
  • the projection 20 having such a shape may be integrally formed with the main body 11 including the flange portion 16 by using a mold, or the projection 20 may be cut out, or the flange portion 16 may be formed. It may be attached using an adhesive or the like.
  • the formwork 40 has an area 42 that is to face the insert, that is, an area that faces the opening 14 of the insert holder.
  • a setting hole 41 of substantially the same small diameter is formed in advance at the same interval as the protrusion 20. Therefore, in the durable mold 40 of this example, a plurality of setting holes 41 are opened outside the region 42, and no holes are formed in the region 42 where the insert opening is located.
  • the tip 23 of the projection 20 has a spire shape like a needle or a nail.
  • the protrusions 20 are gradually thinned in order to smoothly guide them into the holes 41.
  • the edges should be dropped, hemispherical, or semicircular as in this example. Desirable.
  • the setting hole 41 formed in the mold 40 may be very small in accordance with the protrusion 20. It is desirable that the size of the setting hole 41 be such that it is naturally clogged with the back of concrete, for example, a diameter of about 8 mm or less.
  • the outer diameter of the projection 20 is about 2 mm or more, desirably about 3 mm or more, and the inner diameter of the setting hole 41 is also protruded. A total of about 2 mm or more is good, and a thickness of about 3 mm or more is desirable. Even if the diameter is about 1 Omm, it can be easily closed by a process such as applying tape instead of welding, so up to this point, even if the insert position changes, the formwork will be affected. No need to give.
  • FIG. 3 shows a state in which the insert 6 is set to the formwork 40 using the insert holder 10 of the present example.
  • the protrusion 20 of the insert holder 10 of this example has a shape in which the rib 25 is combined with a cross, and can be substantially elastically deformed in accordance with the inner diameter of the setting hole 41. Therefore, the protrusion 20 is relatively simple: for example, it can be inserted into the setting hole 41 only by an operator pushing by hand or tapping lightly with a hammer.
  • the tip 23 of the projection 20 in this example is rounded and thin, if the projection 20 is located near the setting hole 41, it fits into the setting hole 41 itself, so that it takes no trouble. Work in tight spaces.
  • the insert holder 10 of the present example can be set by simply inserting it from the side of the surface 40a of the formwork, so that one person can work.
  • the projection 20 When the projection 20 is inserted into the setting hole 41, it deforms substantially elastically inside the setting hole 41, and presses the inner surface of the setting hole 41 to insert the insert including the insert. In order to set the holder 10, sufficient adhesive force can be obtained. Further, since the projections 20 are made of resin, they do not damage the mold 40 or the setting holes 41 formed in the mold, so that the durability of the mold is not impaired. Therefore, the insert holder can be set any number of times using the same setting hole 41. Further, the protrusion 20 of the present example spreads when the portion 25a corresponding to the thickness of the mold 40 passes through the setting hole 41, and presses the mold 40 from the back side 4 Ob. For this reason, the insert holder 10 is set sufficiently firmly in the formwork 40 by the projections 20, and the insert 6 is displaced from the predetermined position even if concrete is poured into the formwork 40. There is no.
  • the flange surface 1 ⁇ hits the surface 40a of the formwork to prevent concrete from entering the inside of the flange surface 17 .
  • Minute irregularities on the surface of the formwork or flange surface There may be a small gap 43 between the mold surface 40a and the flange surface 17 due to the slight inclination of the set angle of the insert holder. .
  • the seal 31 is sandwiched between the surface 40a of the formwork and the flange surface 17, even if such a gap 43 occurs, the concrete is still there. There is no intrusion.
  • the sealing material 31 is made of an elastic foamed plastic, it can absorb minute irregularities on the surface 40a and the flange surface 17 of the formwork, and can also shield minute gaps generated partially. Further, since the sealing material 31 is a thin film, even if it is between the flange surface 17 and the formwork 40, it does not change the adhesive force of the insert holder 10 and a new gap is generated. No cause. Also, since the seal 31 is processed into a ring shape, it only needs to be hooked around the protrusion 20, and the installation is not troublesome.
  • the insert holder 10 of the present example can easily insert the insert 6 into the mold frame 40 simply by inserting the projection 20 into the setting hole 41 prepared in the mold frame 40 in advance. Can be set to Further, no bolt is required to attach the insert 6 to the formwork 40, and even one operator can easily set the insert in a short time. A mounting jig such as a boss is attached to the formwork side (there is no need to cut it, and it is only necessary to prepare the small diameter setting hole 41).
  • the cross section of the protrusion 20 is deformed in accordance with the setting hole 41, the adhesive force is obtained, so that even if the surface of the mold 40 is coated with a fat or oil, a release agent or the like, there is little effect. Furthermore, since the number and diameter of the protrusions can be adjusted depending on factors such as the size of the insert, it is possible to provide an insert holder that reliably sets the insert in the formwork. Demolition of concrete products
  • FIG. 4 shows a state in which the concrete product 2 in which the insert holder 10 and the insert 6 of this example are embedded is removed.
  • Concrete The inner formwork that forms the inner surface of the lock and the like is suspended together with the concrete block 2 after the outer formwork is removed, and the concrete form is formed using impact, vibration, air pressure, or the like. -Removed from the inside of block 2.
  • the force when the formwork 40 is removed from the concrete product 2 acts on the connecting portion 27 of the protrusion 20,
  • the protrusion 20 is cut off.
  • the weight of the inner form acts with the shearing force and the projection is cut off. Accordingly, in the demolded concrete product 2, the flange surface 17 of the insert holder 10 is exposed on the surface thereof, and the cut trace 29 of the protrusion is formed on the flange surface. Remains.
  • the cut protrusions 28 left in the setting holes 4 1 of the formwork are formed by the wide part 25b of the rib that presses the backside 40b of the formwork, and the connection part 27 Since it becomes thicker toward the tip, it is in a state where it can be easily extracted to the back 40b side of the mold. Therefore, when a jig such as a wire pushes the mold from the surface 40a side or inserts a protrusion of the next insert holder, the protrusion remaining in the setting hole is easily removed. The processing of such cut projections is also easy.
  • the mold in addition to the mold being removed so as to slide on the surface of the concrete product, the mold may be swiveled and removed. At this time, a sufficient force acts on the formwork to separate the formwork from the concrete product, and when this force acts on the contact portion 27 of the protrusion 20, the connection is made in the same manner as above.
  • the protrusion is cut from the part. In some cases, the protrusion 20 may be pulled out of the setting hole 41 in the opposite direction.
  • the insert holder 10 is released from the mold 40 by the force acting upon removal from the mold. As described above, if the insert is buried using the insert holder of this example, an extra step of removing the setting bolt is not required, and the insert or insert is not required.
  • FIG. 5 shows a state when the insert 6 embedded in the concrete product 2 is used.
  • This member 3 2 can be easily combined with the beam 3 2 a supporting the member 3 2 by pushing a tapered jig such as pliers 39 into the boundary between the member 3 2 and the flange surface 17. Can be removed.
  • the insert 6 and the open opening 14 appear, and the insert 6 can be used therethrough.
  • the seal 31 is provided at the edge of the flange surface 17, the member 32 covering the opening 14 is not buried in the concrete. Since the inserts protect the insert from dust and rainwater during transportation and storage, it is desirable to remove the insert immediately before using the insert.
  • the flange surface 17 has only traces 29 of the cut projections, and no special work such as mortar filling is required. Even when the projections 20 are left without being divided, these projections can be easily treated with cutters, scissors and the like.
  • the protrusion having a shape that is substantially elastically deformed is not limited to this example.
  • an approximately crescent, polygonal, star, or other elastically deforming material that touches the inner surface of the setting hole at two or more points, or deforms along the shape of the setting hole with some plastic deformation A protrusion can be adopted.
  • the protrusion may have a shape such that the protrusions and depressions are periodically repeated in the longitudinal direction and the circumferential direction of the protrusion, or a hollow cylindrical protrusion may be used.
  • a high adhesive force can be obtained by using a material having a high elasticity such as rubber or soft vinyl chloride as the material forming the projections.
  • the shape of the setting hole opened in the formwork is not limited to the circular shape as in this example, and the shape of the projection corresponds to the shape of the hole having a polygonal cross section, along the thickness direction of the mold. Those with varying hole sizes can be used.
  • FIG. 6 shows a different example of the insert holder of the present invention.
  • the insert holder 10 of the present example has a disk-shaped flange portion 16, and three projections 7 from the side of the surface 17 facing the formwork 40 of the flange portion 16. 0 is protruding. Also, three protrusions from the back surface 19 of the flange section 16 The protrusion 79 protrudes to the opposite side of the protrusion 70.
  • projections 70 and 79 are arranged outside the opening 14 formed in the center of the flange portion 16, and there is no interference between the opening 14 and the projection 70 or 79. Further, an adhesive layer 33 is provided along the outer periphery of the surface 17 of the flange portion.
  • the insert holder 10 of the present example can be used in combination with the insert holder 90 conventionally used in a construction site.
  • This conventional insert holder 90 has three holes 99 formed in a flange portion 96 so that it can be attached to a plywood formwork with a nail.
  • the cross section of the cylindrical body 91 is hexagonal so that it can be inserted and supported from one end 93.
  • a buried metal part is formed by using a hexagonal nut 9 and a U-shaped reinforcing bar 9a inserted at one end of the nut 9. It is.
  • FIG. 7A shows a state in which the insert 9, the insert holder 90, and the insert holder 10 are combined to form a mold 40.
  • the projection 70 used here has an upper half 72 extending substantially conically from the tip 73 and a lower half of a cylindrical shape thinner than the upper half 72. 7 and 5.
  • the upper half 7 2 of the projection has a so-called Mine-ya shape, and the widened base 7 4 of the upper half 7 2 is the part where the upper half 72 and the lower half 75 are connected. 6 on the insert holder side.
  • the length of the lower half 75 is approximately the same as or slightly longer than the thickness of the mold 40.
  • a notch 78 is provided in a portion connected to the flange portion 16.
  • Fig. 7 (b) shows how the concrete product 2 is released.
  • the force acting when removing the mold is applied to the lower half 75 of the projection 70, particularly to the notch 78, so that the projection 70 is cut therefrom.
  • traces 29 of the projections remain on the insert holder as in the above embodiment. Note that the strength of the upper half 72 may be slightly reduced so that the skirt portion is broken by the force when the mold is removed, and the protrusion 70 may be pulled out together with the insert holder.
  • FIG. 8 illustrates a projection having a shape different from the above.
  • the rough shape of the projection 70 shown in FIGS. 8A and 8B is such that the upper half 72 expands in a truncated cone shape from the tip 73 and the lower half 75 gradually narrows.
  • the protrusion 70 shown in FIG. 8 (a) is composed of a support 101 protruding from the insert holder 10 toward the tip 73 and a support 101 at the tip 73, as described above. It is composed of a member 102 having a side surface extending from the upper half to the lower half, and a gap is provided between the column 101 and the member 102. Further, the protrusion 70 shown in FIG.
  • each of the members constituting such a projection moves elastically, it is suitable for forming the projection using a hard plastic having excellent moldability, for example, ABS resin, PPO or the like.
  • FIG. 9 shows an insert embedded in a concrete product as a second embodiment of the present invention.
  • the insert 60 of the present example is formed of a plastic such as reinforced polyethylene, and a projection 20 is provided on the side of the opening 65 of the insert.
  • the insert 60 is provided with a substantially cylindrical insert body 61, and the main body 61 has a closed side 63 like the commercially available insert and has a hollow body.
  • a female screw 67 is formed inside the housing, and a stopper 64 extending outward from the main body is provided.
  • the setting side having the opening 65 has a disk-shaped flange portion 66 extending outward from the insert body 61, and the flange portion 66 and the stopper 64 are provided.
  • FIG. 10 shows the protrusion 20 of the present example in an enlarged manner.
  • the protrusion 20 in this example has a hollow cylindrical shape inside, and the tip 23 of the protrusion is cut off so that it can be easily inserted into the setting hole, and also does not hurt workers or work clothes.
  • a connecting portion 27 between the projection 20 and the surface 67 of the flange is provided with a recess 26 in the circumferential direction so as to reduce the cross section of the portion. Therefore, when the mold is released, the projection 20 is cut from the recess 26.
  • An adhesive tape 33 is further attached to the surface 62 of the flange portion.
  • the adhesive tape 33 covers almost the entire surface from the edge of the surface 62 of the flange portion to the periphery of the projection 20 except for the opening 65.
  • the surface of the adhesive tape 33 is covered with a protective film 35, and the protective film 35 is divided across the protrusions 2.0 so that even a worker wearing gloves can easily separate the protective film 35, and furthermore, each of the protective films 35 is further separated.
  • An outer piece 36 extending outward from the flange portion 66 is provided.
  • Fig. 11 shows how the insert 60 of this example is set in the formwork 40.
  • the protective film 35 is removed by holding the outer piece 36, and the projections 20 are fitted into the setting holes 41 prepared in the mold 40 in advance.
  • This Insert 60 is then set to formwork 40.
  • the adhesive tape 33 hits the mold surface 40a, the adhesive tape 33 closely adheres to the mold surface 40a, so that the flange surface 62 and the mold surface 40a There is no gap between them, and it is possible to prevent the concrete from entering the openings 65 and the setting holes 41.
  • the projection 20 is disposed on both sides of the opening 65, avoiding the opening 65, and the projection 20 and the opening 65 do not interfere with each other. Therefore, also in the insert of the present embodiment, the protrusion 20 is not affected by the diameter of the opening 65 as in the above embodiment, and a protrusion having an appropriate diameter can be integrally formed with the insert.
  • the protrusion 20 in this example is cylindrical and has a size that can be fitted in a set hole 41 formed in the formwork 41 in a tight fit or a fit fit. Therefore, even if the protrusion 20 has a small diameter, a sufficient adhesive force for setting the insert 60 in the mold can be obtained.
  • the hollow projections 20 are fitted into these setting holes 41 while slightly deforming, and the insert 60 can be easily mounted. Since the setting hole 41 formed in the mold 40 may be small in accordance with the protrusion 20, it is easy to change the place where the insert is set, as in the above embodiment.
  • FIG. 12 shows a state in which the embedded concrete product 2 of the insert 60 of the present example is removed from the mold.
  • the cylindrical projection 20 is cut from the recess 26 by the force applied when the mold is released. Therefore, the insert 60 of this embodiment can remove the mold in as few steps as in the case of the concrete product having no buried object, similarly to the above embodiment.
  • the diameter of the protrusion can be selected regardless of the dimensions of the insert opening 65, the outer diameter of the protrusion is set to about 10 mm or less, preferably, about 3 to 8 mm. It is possible. Therefore, the protrusions are beautiful There is no such worry as it is cut.
  • FIG. 13 shows an insert 60 provided with a projection having a shape different from that described above.
  • FIG. 14 shows an enlarged view of the protrusion 20
  • FIG. 15 shows a state in which the protrusion 20 is inserted into the setting hole 41 of the formwork.
  • the common parts of the insert 60 of this example are denoted by the same reference numerals, and description thereof will be omitted.
  • the cross section of the protrusion 20 in this example is substantially crescent-shaped, and the width L 0 of the crescent-shaped protrusion differs depending on the position, but the inner diameter of the setting hole 41 provided in the formwork 40 at the maximum. It is slightly wider.
  • the tip 23 of the projection 20 gradually changes from a crescent-shaped cross section to a half-moon-shaped cross section in order to smoothly guide the projection 20 to the setting hole 41, and further toward the tip, a hemisphere. It is thin.
  • the protrusion 20 having a cross section that contacts at least two points with such a setting hole is elastically deformed along the setting hole 41 of the formwork 40, and therefore, similarly to the above insert,
  • the insert 60 in this example can be set to the formwork 41.
  • the molds can be removed by the same process as a concrete product having no embedded insert.
  • FIG. 16 and FIG. 17 show a state in which a sleeve 120 whose length can be adjusted is buried as a third embodiment of the present invention.
  • the sleeve 120 of this example is provided with a cylindrical main body 121 and a cylindrical slide portion 123 that expands and contracts while being in contact with the inner surface 122 of the main body 121.
  • the leading end 124 of the slide portion 123 extends in a flange shape and can be applied to another formwork, for example, the outer formwork 45.
  • a stopper 125 is provided inside the main body 122 so that the slide portion 123 does not protrude from the surface 127 on the setting side.
  • An outwardly extending flange 1 26 is formed on the setting side of the main body 1 2 1.
  • the flange 126 and the mold 40 are in contact with the wide flat surface 127 to prevent leakage of concrete into the sleeve.
  • two projections 70 protrude from this surface 117 on the side opposite to the main body
  • the two projections 70 protruding from the sleeve 120 of the present example are elongated, and are located outside the opening 127 of the sleeve as in the above-described embodiment.
  • Each projection 70 comprises an elongated column 105 and a hook-like portion 106 extending inward at its tip, the hook-like portion 106 facing each other.
  • the distance L 2 between the columns 105 is smaller than the distance L 1 between the centers of the setting holes 41. For this reason, when the protrusion 50 of the sleeve 120 of this example is inserted into the setting hole 41 of the formwork, the surface facing the inside of the support post 105 hits the setting hole 41, and the mold is formed at this part. Insert frame 40.
  • the tip of the projection 70 is formed at the end of the formwork.
  • the mold 40 is sandwiched between the tip of the projection 70 and the flange surface 127 of the main body.
  • the two projections 70 provide sufficient adhesion to set the sleeve 120 of the present example.
  • the relationship between the distance L2 between the columns and the distance L1 between the setting holes 41 may be opposite to that in this example, and the hook-shaped portion may extend outward.
  • the adhesive force may be obtained by changing the pitch circle diameter of the projections and the pitch circle diameter of the setting hole.
  • Figure 17 shows the removal of a concrete product with embedded sleeves.
  • the protrusions used in this example are also automatically cut off from the sleeve 120 by the force applied when removing the mold, so there is no need to perform any work before removing the formwork, and the position where the sleeve is embedded is limited.
  • FIG. 18 shows a plug 50 according to a fourth embodiment of the present invention, in which an insert is set in a mold while being inserted into an opening of the insert.
  • This plug 0 is an integrally molded product made of a synthetic resin as in the above-described embodiment, and has a hollow cylindrical body 51 screwed into the opening of the insert 6, and an opposite side from the body 51. And a projection 20 protruding in the direction of the mold 40.
  • a substantially flat setting surface 52 is formed on the side of the main body 51 facing the mold 40, and a projection 20 projects from substantially the center of the setting surface 52.
  • a pair of depressions 80 are formed on the setting surface 52 with the projections 20 interposed therebetween. As described later, the jig is inserted into these depressions 80 and turned to turn the body 51 into an sensor. Can be removed from the bird.
  • the main body 51 has an external thread formed on an outer peripheral surface 53, and has a flange portion 55 extending to the outside of the main body 51 on the side that comes into contact with the mold 40.
  • the side of the flange portion 55 facing the formwork 40 is the setting surface 52.
  • the outer peripheral surface 56 of the flange portion 55 is narrowed in a substantially truncated conical shape in a direction away from the setting surface 52, and from the sensor 6 buried in the concrete product to the main body.
  • the flange section 55 does not interfere with the concrete product when removing it.
  • a thin film 37 extends from the flange portion 55 like a scar.
  • the projection 20 employed in the plug 50 of this example is substantially cylindrical, and the tip 23 of the projection is smoothly narrowed with a corner dropped. Further, four ribs 25 extending substantially in a triangular shape in the radial direction of the protrusion 20 are provided on the outer periphery of the protrusion 20. The surface 22 a of the rib 22 facing the tip extends radially from the tip 23 toward the setting surface 52, while the surface 22 b facing the setting surface 52 is reversed.
  • the connecting portion 27 of the protruding portion '20 is gradually narrowed toward the setting surface 52, and is cut off from the connecting portion 27 by a force when the mold is released.
  • the plug 50 of the present example has a cylindrical shape opened on the opposite side to the projection 20 with respect to the setting surface 52, and the inside 57 is hollow. It is. Further, a projection 20 that is thinner than the inside of the main body 51 extends from the setting surface 52 to the side opposite to the main body 51.
  • the plug 50 having such a configuration can be molded from each side by using a mold formed by each of the projection 20 and the main body 51 with the setting surface 52 interposed therebetween. That is, the side of the mold 40 from the setting surface 52 can be formed by using a mold for forming the projections 20, and the opposite side can be manufactured by a mold for forming the main body 51. Therefore, it can be easily formed integrally using a plastic material such as polyethylene or polypropylene.
  • the main body 51 often has an outer diameter of 8 to 5 O mm or more in accordance with the inner diameter of the insert.
  • a thicker wall will increase the cooling time, causing sink marks and bubbles.
  • the wall thickness exceeds about 4 mm, distortion occurs due to sink Therefore, the dimensional accuracy of the main body 51 is deteriorated.
  • the projection 20 and the main body 51 can be designed and molded, respectively, so that the wall thickness of the main body 51 can be appropriately selected. Therefore, it is possible to form a small projection on a main body having a large outer diameter and a thin wall like the plug of this example.
  • the mold 40 is provided with one setting hole 41 where the opening of the insert 6 'is to be set.
  • the setting hole 41 may have a small diameter in accordance with the protrusion 20 and can flexibly respond to a change in the insert setting position as in the above-described embodiment.
  • the insert 6 can be attached by a male screw provided on the outer periphery 53 of the plug body 51. If the protrusion 20 is inserted into the setting hole 41, the insert 6 can be molded through the plug 50. It is set at a predetermined position in the frame 40.
  • the protrusion 20 is designed to fit into the setting hole 41, and when the protrusion is pushed in as described above, the rib 22 comes out on the side of the rear surface 40b of the form and expands to form the form 4. Since 0 is pressed, a high adhesive force is obtained.
  • the work for setting the insert can be done by one person from the side of the formwork surface 40a, and the insert can be set by the hand of the worker, so there is no need for a large work space.
  • using the plug 50 of the present example simplifies the work of setting the insert.
  • a thin-film member 37 extending in a constructive shape from the setting surface 52 toward the mold is brought into close contact with the surface of the mold, and the periphery of the setting surface 52 is Is sealed from concrete.
  • the protrusion 20 Be cut off. Therefore, when the plug 50 of this example is used, even if the insert is set at any place of the formwork, the surface of the concrete plate can be damaged without trouble as in the related art. This makes it possible to remove the mold smoothly without giving any trouble.
  • the cut projections can be easily removed because the back surface 4 Ob of the form is pressed by the surface 22b of the rib 22.
  • the setting surface 52 appears on the surface of the concrete product, and the recessed operation unit 80 appears on the setting surface 52. Since the protrusion 20 has been cut off at, there is only a mark 29 cut off. Since the operation unit 80 is located on the surface of the concrete product, the jig 85 can be easily inserted, and the main body 51 can be easily removed by rotating the inserted jig 85. In this example, since the periphery of the setting surface 52 is sealed from the concrete by the scar-shaped member 37, the setting surface 52 clearly appears on the surface of the concrete and the insert Position is easy to understand. Further, since the concrete does not solidify on the setting surface 52, the operation of the operation unit 80 can be performed reliably. The plug 50 may be removed just before using the insert 6, and the insert 50 can prevent the insert from being clogged with dust or rainwater.
  • FIGS. 22 and 23 show examples of a plug 50 different from the above.
  • the plug 50 of this example three protrusions 20 protrude from the setting surface 52.
  • the shape of each projection 20 is substantially the same as that of the first embodiment described with reference to FIG.
  • a single groove 84 is formed substantially at the center of the setting surface 52 of the present example as an operation unit 80.
  • the projection since the projection is formed so as to be separated from the main body 51 by the setting surface .52, a plurality of projections 20 are provided, and the arrangement and size thereof can be freely selected.
  • three or more projections can be provided, and the diameter of the projections and the diameter of the setting hole can be reduced by reducing the adhesive force that can be obtained in one step.
  • the shape of the dent for operating with the jig is Not only a single groove as in the example, but also a variety of things such as a cross-shaped groove and a recess for a hexagon wrench can be formed.
  • using the concrete buried object according to the present invention does not limit the method of demolding or the turning radius of the mold, etc.
  • buried objects such as insert sleeves can be set.
  • no matter where the concrete insert, such as an insert, is set the same process as for a concrete product without the insert is performed without the hassle, and the risk It can be removed without performing expensive operations.
  • the protrusion for mounting the concrete buried object of the present invention on the formwork can be made thin, the setting hole formed in the formwork can be small. For this reason, it is possible to flexibly respond to changes in the buried position, etc., and it is not necessary to newly construct a formwork or to repeatedly repair the formwork each time it is changed. Inserts can be buried anywhere without compromising the life of the durable formwork. Therefore, for factory prefabricated products, where demand will increase in the future, products with embedded products, such as inserts, can be inexpensively installed at the location requested by the customer without restricting the location of the inserts, etc. In addition, it can be supplied in a short time.
  • the concrete buried object of the present invention can be integrally molded with a resin such as plastic and can be mass-produced at low cost, so that a large number of inserts or inserts buried in the inner wall of a common groove, etc. Ideal for holding tools.
  • the concrete buried object of the present invention is set at a predetermined position of a mold, such as an insert, and is buried in a concrete product.
  • a mold such as an insert
  • it can be easily used in places where it was conventionally difficult to embed inserts and other buried objects, such as inside formwork that cannot be reached by workers, or places with small turning radii when removing molds.
  • This is a concrete buried structure that can be set and removed without any hassle.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Abstract

Une pluralité de parties saillantes (20) minces faisant saillie sur la face opposée d'un corps (11) sont placées sur une surface (17) de bride d'un dispositif de retenue (10) d'élément d'insertion et un élément d'insertion (6) est placé sur une forme par insertion des parties saillantes (20) dans des trous (41) formés dans la forme (40). Lesdites parties saillantes (20) sont automatiquement sectionnées du dispositif de retenue (10) d'élément d'insertion par une force qui agit sur elles lorsque la forme est retirée, si bien que toute opération telle que le démontage de vis n'est pas du tout nécessaire lorsque l'on retire la forme, ladite forme pouvant être retirée facilement sans provoquer de rupture latérale sur des surfaces d'un produit en béton. En outre, lesdites parties saillantes (20) sont placées à l'extérieur d'une ouverture (14), ce qui permet de réduire leur diamètre et de garder petits les trous (41) d'encastrage formés dans la forme. En conséquence, il est possible de répondre avec souplesse à une situation dans laquelle une position d'installation d'un élément d'insertion est modifiée.
PCT/JP1994/001893 1993-11-12 1994-11-09 Dispositif encastre dans du beton WO1995013436A1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP30722993 1993-11-12
JP5/307229 1993-11-12
JP5/325958 1993-11-29
JP32595893 1993-11-29
JP5/325957 1993-11-29
JP32595793 1993-11-29
JP5/343703 1993-12-15
JP34370393 1993-12-15

Publications (1)

Publication Number Publication Date
WO1995013436A1 true WO1995013436A1 (fr) 1995-05-18

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PCT/JP1994/001893 WO1995013436A1 (fr) 1993-11-12 1994-11-09 Dispositif encastre dans du beton

Country Status (2)

Country Link
TW (1) TW271454B (fr)
WO (1) WO1995013436A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999061716A1 (fr) * 1998-05-28 1999-12-02 Brian Donohoe Procede et dispositif d'ancrage destines a fournir un point d'ancrage dans une structure en beton
EP3208397A1 (fr) * 2016-02-22 2017-08-23 Black & Decker Inc. Ensemble d'ancrage et élément de base associé
EP3693521A1 (fr) * 2019-02-06 2020-08-12 Pino Albanese Tourillon de montage pour dispositif d'ancrage et procédé d'extension de tourillon de montage
CN111677163A (zh) * 2020-06-19 2020-09-18 中建富林集团有限公司 一种玻璃幕墙及其施工方法
CN114379112A (zh) * 2022-01-16 2022-04-22 华南农业大学 具有缓冲部的木塑重组竹多元复合建筑部品及制造方法
US11578492B2 (en) * 2009-02-04 2023-02-14 Centres Holdings, Llc Concrete anchor
US11692342B2 (en) * 2016-02-11 2023-07-04 Cetres Holdings, Llc Concrete anchor bodies and plugs

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Publication number Priority date Publication date Assignee Title
JPS4423168Y1 (fr) * 1964-12-15 1969-09-30
JPS5263907U (fr) * 1975-11-07 1977-05-11
JPS52102111U (fr) * 1976-01-30 1977-08-03
JPH0523685Y2 (fr) * 1988-04-01 1993-06-17

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4423168Y1 (fr) * 1964-12-15 1969-09-30
JPS5263907U (fr) * 1975-11-07 1977-05-11
JPS52102111U (fr) * 1976-01-30 1977-08-03
JPH0523685Y2 (fr) * 1988-04-01 1993-06-17

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999061716A1 (fr) * 1998-05-28 1999-12-02 Brian Donohoe Procede et dispositif d'ancrage destines a fournir un point d'ancrage dans une structure en beton
US11578492B2 (en) * 2009-02-04 2023-02-14 Centres Holdings, Llc Concrete anchor
US11692342B2 (en) * 2016-02-11 2023-07-04 Cetres Holdings, Llc Concrete anchor bodies and plugs
EP3208397A1 (fr) * 2016-02-22 2017-08-23 Black & Decker Inc. Ensemble d'ancrage et élément de base associé
EP3208398A1 (fr) * 2016-02-22 2017-08-23 Black & Decker Inc. Élément de base pour un ensemble d'ancrage et procédé d'utilisation
US10151102B2 (en) 2016-02-22 2018-12-11 Black & Decker, Inc. Base member for an anchor assembly and method of use
USRE50116E1 (en) 2016-02-22 2024-09-10 Black & Decker Inc. Base member for an anchor assembly and method of use
EP3693521A1 (fr) * 2019-02-06 2020-08-12 Pino Albanese Tourillon de montage pour dispositif d'ancrage et procédé d'extension de tourillon de montage
EP4223958A1 (fr) * 2019-02-06 2023-08-09 Pino Albanese Tourillon de montage pour un dispositif d'ancrage et procédé d'extraction de tourillon de montage
CN111677163A (zh) * 2020-06-19 2020-09-18 中建富林集团有限公司 一种玻璃幕墙及其施工方法
CN114379112A (zh) * 2022-01-16 2022-04-22 华南农业大学 具有缓冲部的木塑重组竹多元复合建筑部品及制造方法
CN114379112B (zh) * 2022-01-16 2023-01-31 华南农业大学 具有缓冲部的木塑重组竹多元复合建筑部品及制造方法

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