Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G15/00—Forms or shutterings for making openings, cavities, slits, or channels
  • E04G15/04—Cores for anchor holes or the like around anchors embedded in the concrete
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G15/00—Forms or shutterings for making openings, cavities, slits, or channels
  • E04G15/06—Forms or shutterings for making openings, cavities, slits, or channels for cavities or channels in walls of floors, e.g. for making chimneys
  • E04G15/061—Non-reusable forms
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
  • E04G21/14—Conveying or assembling building elements
  • E04G21/142—Means in or on the elements for connecting same to handling apparatus
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
  • E04G21/14—Conveying or assembling building elements
  • E04G21/16—Tools or apparatus
  • E04G21/18—Adjusting tools; Templates
  • E04G21/1841—Means for positioning building parts or elements
  • E04G21/185—Means for positioning building parts or elements for anchoring elements or elements to be incorporated in the structure

Definitions

• the present invention relates to an insert, a sleeve, an insert holder to be embedded together with an insert, and a formwork inserted into an opening of the insert, the insert being embedded in a concrete product.
• the concrete buried object having a cylindrical body such as a plug to be mounted on a concrete body, and the structure of a setting tool suitable for setting this concrete buried object on a formwork Things.
• inserts For concrete boxes such as handholes used when burying electric wires in the ground and common trenches for burying gas and water, etc., inserts should be buried in advance. And many. This insert will be used to carry boxes and to install cable and pipe racks.
• Such concrete boxes are mass-produced in factories using a durable formwork made of iron plate or the like.
• a hole that penetrates the formwork 3 is made at the place where the insert 1 is set, and a bolt 5 is inserted into the hole from the outside of the formwork 3 to insert the sensor. It is fixed using the female screw prepared inside the turret 1. Thereafter, the small concrete 4 is poured into the formwork 3 to produce a concrete product in which the insert is buried.
• most of the outer formwork 3 is attached so as to be able to turn with respect to the base plate 6, and when the mold is removed, the outer formwork 3 is turned outward. If the inner form 7 also has a space to turn inside the form, remove the form. It is designed to be able to turn with respect to the platform 6 for easy operation. Conventionally, it is necessary to remove the bolt 5 holding the insert 1 on the outer mold before rotating and removing the outer mold 3. For this reason, the work of attaching and detaching the bolt 5 for setting the insert 1 to the formwork 3 must be repeated each time a secondary concrete product is manufactured.
• the jig 10 for installing the insert shown in Fig. 17 passes through the hollow plastic boss 11 inserted into the insert 1 and the hole 8 provided in the formwork 3. Insert a through bolt 12 for setting the lever boss 11, a rubber washer 13 mounted on the outside of the formwork 3, and an appropriate washer 13. A washer cover 14 is pressed against the formwork 3 with pressure, and a nut 15 is provided for fixing the washers.
• the plastic boss 11 is smooth and tapered toward the tip so that the insert 1 can be easily attached and detached.
• the mold is removed, when the formwork turns and the boss 11 is tilted with respect to the insert 1, the hollow boss 11 is deformed and detaches from the insert 1. Therefore, Figure 1
• the chip around the insert will be chipped if it is at or above the specified turning radius. It can be removed without the need.
• the mounting device 10 Since the boss 11 and the washer 13 are made of plastic and the like, the mounting device 10 is not oil or heat resistant, and is made of a steel plate or the like. The service life is shorter than that of a rigid formwork. Therefore, this fitting 10 is considered as a consumable in the process of manufacturing a concrete product. It is expensive because it is handled and has complicated mechanisms. In addition, the gap L0 between the cover 14 and the formwork 3 must be properly maintained each time it is replaced, and this gap must be adjusted each time the fitting 10 is replaced. O
• the conventional boss including the boss 11 of the mounting device 10, is long and has a contact area with the insert, so that concrete can be injected and compacted afterwards.
• the insert does not come off even if it receives the shock of time. For this reason, when setting up an insert to the boss, it is necessary to give a great deal of power to the boss, for example. Therefore, a large work space is required, and if the work space inside the formwork is small, it is difficult to fit the insert into the boss, and it takes time to set. Insufficient fitting may cause the insert to come off during molding of the concrete product.In this way, the embedded concrete product with the insert is It takes a lot of time to manufacture the product, and at that time, it is necessary to take great care to prevent the insert from falling off.
• the present invention provides a concrete buried object that can be easily and reliably set on a formwork even in a narrow work space, and can reduce the time and labor required for the concrete, and a setting tool therefor. It is intended to do so.
• a long-life, simple setting tool and a concrete buried object to set it, maintenance and replacement of the setting tool, and adjustment Eliminates work and can reduce manufacturing costs
• the purpose is.
• it can be easily set even in places where the turning radius of the formwork for manufacturing concrete products is small, without having to remove and insert the bolts, and even without removing the setting tool.
• Another object of the present invention is to provide a concrete buried object and a setting tool in which the concrete poured into the mold does not leak inside. Disclosure of the invention
• protrusions provided on the formwork are short, the area where the concrete buried object contacts the protrusions is reduced, and the adhesive force is reduced. Therefore, in the present invention, projections and recesses are provided on the protrusions and the concrete buried object so that the concrete buried objects can be reliably set for the short protrusions. They are trying to meet each other.
• the substantially cylindrical main body is provided with a resin-made mounting portion, and the mounting portion is provided with a part of the protrusion.
• a mating portion is provided, and the mating portion is arranged near the tip of the mounting portion corresponding to the low protrusion.
• the projections for setting are substantially disc-shaped and the outer periphery is combined with at least one part of the concrete buried object. It can be configured by attaching the boss body having the following shape to the inner surface of the formwork with a bolt or the like.
• At least a part of the outer periphery of the disk-shaped boss body may be provided with protrusions or depressions, or the tip of the boss body may be extended outward.
• the projections or dents may be formed by at least one continuous or intermittent peak or groove along the outer peripheral surface in the circumferential direction of the boss body, or may be formed by a plurality of concave and convex portions. You may.
• a projecting portion is provided on the outer peripheral surface, it is also effective to form an angular portion on the side of the formwork of the projecting portion. Even if a protruding part with a rounded corner is provided on the side of the formwork, this part does not hinder the insertion of concrete buried objects. Then, when the concrete buried object is fitted at one end, the squared part hits the resin mounting part, and it is cut or close to this part. The buried objects will not come off easily.
• the mounting part of the concrete buried object is made of resin, it can be easily inserted into the boss body having a mating portion. It becomes difficult to slip out.
• the resin mounting part will be deformed, and the boss body will be short. The buried object comes off the boss body. At this time, since the boss body is short and there is little interference with the surface of the concrete product, even if the concrete buried object is set at a place where the turning radius of the formwork is relatively small, -There is no chipping on the surface.
• the space between the outer shell and the inner shell can be formed by extending the substantially cylindrical inner shell inside the substantially cylindrical outer shell extending from the body of the concrete buried object. It can be used as a compressible area where concrete does not enter.
• the elastic band may be made a compressible area by covering the inner shell with an elastic band such as rubber, sponge, or cardboard.
• the space inside the outer shell can be used as a compressible region.
• the outer shell prevents the intrusion of concrete by ensuring the strength as an embedded object and the area that comes into contact with the inner surface of the formwork. It can be held at a predetermined angle, and can have the function of clearly delineating the buried object on the surface of the concrete product.
• the inner shell and the part protruding from the outer shell that make up the mounting part can be fitted easily to the boss body, not easily come off, and can be designed to be suitable for easy removal.
• the inner shell does not require strength as a buried object, so the wall thickness can be reduced.
• the tip of the exterior part is placed forward of the tip of the mounting part, that is, closer to the inner surface of the formwork, the tip of the exterior part will come ahead of the tip of the mounting part. Since it comes into close contact with the inner surface, intrusion of concrete into the concrete buried object can be reliably prevented.
• FIG. 1 is a perspective view showing an outline of an insert holder according to a first embodiment of the present invention. It is.
• FIG. 2 is an exploded view showing, using a partial cross section, how the insert holder shown in FIG. 1 is set on a mold using the boss of the present invention.
• Fig. 3 (a) is an enlarged cross-sectional view showing the place where the insert holder shown in Fig. 1 is set
• Fig. 3 (b) is an enlarged sectional view showing the place where the insert is removed.
• FIG. 4 is an exploded view showing, using a partial cross section, how to set an insert of a hexagon bolt using an insert holder of a different example of the first embodiment.
• FIG. 5 is a view of the insert holder shown in FIG. 4 as viewed from the setting side.
• FIG. 6 is a perspective view showing an outline of an insert according to the second embodiment of the present invention.
• FIG. 7 is a diagram showing a state where the insert shown in FIG. 6 is set on a mold using the boss of the present invention. It is a development view shown using a partial section.
• Fig. 8 (a) is an enlarged cross-sectional view showing the place where the insert shown in Fig. 6 is set
• Fig. 8 (b) is an enlarged cross-sectional view showing the place where the mold is removed. .
• FIG. 9 is a developed view showing, using a cross section, how to set an insert of a different example from the second embodiment in a mold.
• FIG. 10 is a cross-sectional view showing a state where the insert shown in FIG. 9 is set in a mold.
• FIG. 11 is a developed view showing, using a partial cross section, how to set the sleeve of the third embodiment of the present invention on a mold.
• FIG. 12 is a cross-sectional view showing a state where the sleeve shown in FIG. 11 is buried.
• FIG. 13 is a developed view showing, by using a partial cross section, how to set the plug of the fourth embodiment of the present invention to a mold.
• FIG. 14 is a perspective view showing a state where the plug shown in FIG. 13 is removed from an insert embedded in a compact product.
• FIG. 15 is a diagram illustrating a conventional method of setting an insert in a mold using a bolt, using a partial cross section.
• FIG. 16 is a cross-sectional view showing a state in which the mold is removed from the concrete product in which the insert is buried in FIG.
• FIG. 17 is a diagram illustrating, with reference to a partial cross section, how to set an insert in a mold using a conventional boss.
• FIG. 18 is a cross-sectional view showing a state where the formwork is removed from the concrete product in which the insert is buried in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
• FIG. 1 shows a concrete buried object according to the first embodiment of the present invention.
• the concrete buried object of this example is an insert holder 40 for inserting the insert 1 and setting the insert in the formwork.
• the insert holder 40 of this example has a substantially cylindrical shape with both ends open, one end is a holding side 41 into which a cylindrical insert can be inserted, and the other end is a mold.
• Setting side 30 for setting The setting side 30 and the holding side 41 are separated by a stop part 42 protruding into the insert holder 40, and the insert 1 inserted into the holding side 41 becomes the setting side 3. It does not reach 0.
• the inner surface of the holding side 41 is provided with four protrusions 43 extending at equal intervals in the longitudinal direction, so that even if the outer diameter of the insert 1 is slightly changed, the holding side 4 1 So that it can fit into
• the outer diameter of Insert 1 differs from manufacturer to manufacturer even for inserts with the same inner diameter, or slightly fluctuates within the range of manufacturing errors.
• the insert holder 40 is integrally molded from resin such as polypropylene, reinforced polyethylene, or ABS. Depending on the application, the strength can be increased by adding glass fiber or the like. These materials have some degree of elasticity to some extent, and the difference in the outer diameter of the sensor can be absorbed by the protrusion 43 slightly protruding from the inner surface of the holding side 41.
• the setting side 30 of the insert holder 40 is connected to the outer side of the insert holder 40 continuously with the outer side of the holding side 41, and the cylindrical outer cylindrical portion 35, which constitutes the outer side of the insert holder 40, and the insert holder
• the inner cylindrical part 31 has a cylindrical shape smaller than the outer cylindrical part 35 and is formed continuously with the stop part 42 formed inside the tool 40.
• a gap 34 is provided between the outer cylinder 35 and the outer cylinder 35.
• the outer cylinder portion 35 has almost the same wall thickness as the holding side 41, and the inner cylinder portion 31 has a smaller wall thickness than the outer cylinder portion 35. Further, the tip 32 of the inner cylinder 31 facing the mold 60 is located at a position retracted from the tip 36 of the outer cylinder 35, that is, at a position away from the mold 60.
• the inside of the inner cylindrical portion 31 is a mounting portion 39, and this mounting portion 39 is fitted into the boss 50 mounted on the formwork 60. Set insert holder 40 to formwork 60 with. Therefore, a groove 33 is provided inside the inner cylinder portion 31 near the tip 32.
• the boss 50 of this example includes a thin disk-shaped boss body 51 made of metal and a bolt 55 extending from one end thereof.
• the bolt 55 has a smaller diameter than the boss body 51, and passes the boss body 51 with the nut 59 through the small-diameter hole 61 provided in the form 60 in advance to form the inner surface 62 of the form 60.
• the boss body 51 and the bolt 55 are formed integrally.However, a hole is made in the boss body 51 and a bolt is passed therethrough, or a female screw is cut into the boss body 51. Of course, it can be attached to the formwork. If a bolt 55 with a smaller diameter than the boss body 51 is used, the hole 61 provided in the formwork can be smaller.
• a single projection 52 is provided along the outer periphery of the boss body 51 so that the projection 52 engages the groove 33 of the inner cylindrical portion 31 of the insert holder 40.
• the protrusion 52 is provided near the boss 53 of the boss body 51, and the position thereof is determined when the boss 50 is attached to the formwork 60 and the protrusion 52 of the boss body and the formwork.
• the distance L 1 from the inner surface 62 is a position slightly shorter than the distance L 2 between the groove 33 of the inner cylinder of the insert holder 40 and the tip 36 of the outer cylinder.
• the difference in these distances causes the tip 36 of the outer cylinder to be pressed against the inner surface 62 of the form.
• the tip 36 of the outer cylinder is connected to the tip 3 2 of the inner cylinder. It hits the inner surface 62 of the form earlier, and all the forces due to these differences in distance are applied to the tip 36 of the outer cylinder.
• the reaction causes the groove 33 and the protrusion 52 to be pressed against each other.
• Frictional force acts between the two. Due to these frictional forces, the insert holder 40 does not run idle when the concrete is injected or compacted, and the insert holder 40 does not rotate at these times. Does not fall off the formwork. In particular, in recent years, in table-by-breaks used for compaction in factories, setting with a conventional bolt may cause the insert to rotate and fall off. This is not a concern with the example insert holder. In this way, a considerable force is applied in the direction of pulling the insert holder from the mold until the concrete is filled and the concrete product is completed.
• the difference between the distance L1 and the distance L2 may be about 0.2 to 0.5 mm.
• the insert holder 40 can be attached to the boss 50 with sufficient adhesion.
• the mounting portion 39 that is, the entire inner surface of the inner cylinder portion 31 does not have to be in close contact with the boss body 51. Therefore, it is not necessary to control the manufacturing errors of the inner cylinder portion 31 and the boss main body 51 so strictly, so that the manufacturing cost can be reduced.
• the insert holder 40 is set by aligning the projection 52 of the boss body with the groove 33 of the insert holder, so that the boss body 51 and the inner cylinder 31 are connected. Even if the contact area is small, the insert holder 40 can be reliably set on the formwork 60. Therefore, even if the boss body 51 in this example is thin and the height protruding from the inner surface 62 of the formwork is low, the boss body is sufficiently strong. The site holder can be set. If the boss body 51 is thin, even if the formwork is turned while the boss body 51 is attached, there is little interference with the surface of the concrete product, and it will not be an obstacle when removing the mold. . Furthermore, the setting side 30 of the insert holder 40 is shortened, and the entire insert holder 40 is also shortened, so that the manufacturing cost can be reduced.
• the inner diameter of the inner cylinder portion 31 may be slightly larger than the outer diameter of the boss body.
• An insert holder with a large inner diameter does not require a large mosquito to be mounted, and can be easily operated. For example, it is possible for an operator to manually insert the holder.
• the insert holder can be easily set even in a place where there is no space for swinging a hammer or the like. You can use a hammer, of course, but you don't have to beat it with strong force.
• the fit of the insert holder 40 can be determined based on the feeling that the protrusion 52 and the groove 33 are fitted, so that the insert holder 40 can be easily and securely connected to the formwork. Can be set to 60. Since the insert holder 40 of this example employs the inner cylindrical portion 31 having a thin wall with respect to the outer cylindrical portion 35, it is possible to more easily and reliably set the mold. That is, since the strength of the insert holder 40 can be ensured by the outer cylindrical portion 35, the inner cylindrical portion 31 can be made thinner, and a structure utilized for the elasticity of the resin can be adopted. Further, since there is a gap 34 between the outer cylinder part 35 and the inner cylinder part 31, the inner cylinder part 31 is easily deformed.
• the outer cylinder 35 has a relatively high hardness and is not easily deformed, so that the outer cylinder 35 holds the insert at a predetermined installation angle against the inner surface 62 of the formwork. Performs the function of preventing the intrusion of the filter.
• the inner cylinder portion 35 is relatively flexible, it can be easily fitted when fitted to the boss 50 having the projection 52, and is detached when the projection 52 and the groove 33 engage with one end.
• Fig. 3 (a) shows a state where the insert holder 40 is set to the mold 60 and the concrete is injected
• Fig. 3 (b) shows a state where the mold is removed from the mold. And is shown enlarged.
• the insert holder 40 When the insert holder 40 is mounted on the boss 50, the projection 52 and the groove 33 of the inner cylinder 31 engage with each other, and the insert holder 40 has a sufficient adhesive force. Is set to 60. At this time, the distal end 36 of the outer cylinder of the insert holder 40 is in close contact with the inner surface 62 of the formwork to prevent the concrete from entering the outer cylinder 35 inside. I do.
• the projection 52 provided on the boss body of this example has a substantially semicircular cross section, and the side of the projection 52 opposite to ⁇ 53 of the boss body is cut substantially perpendicular to the outer peripheral surface of the boss body. 5 4 It has been confirmed that there is a slight change in the strength of the insert holder 40 adhering to the formwork depending on the position where the cutting is performed. Higher adhesive strength can be obtained by cutting slightly on the inner surface 62 side of the mold. On the other hand, the edge 53 of the projection 52 keeps a semicircular cross-section, and the ⁇ 53 of the boss body 51 has an angled corner. It is easy to insert 0.
• FIG. 3 (b) shows a state in which the mold 60 is turned to the left on the drawing to remove the mold.
• the center axis of the boss 50 and the center axis of the insert holder 40 intersect and become in an angled state.
• the insert holder 40 is set at a location with a small turning radius, the inner cylindrical portion 31 is pushed toward the gap 34 by the movement of the edge 53 of the boss body 51 and deformed. .
• the inner cylinder 31 deforms only inside the gap 34, and the outer cylinder 31 does not interfere with the boss body 51, so that the boss body 51 hits the surface of the concrete product 4. And not.
• the inner cylindrical portion 31 of this example is made of resin, and has a small wall thickness, so that it is easily deformed by interference with the boss body, which becomes an obstacle for removing the formwork or burying an insert. It does not affect the state. Therefore, even if the insert is buried by the insert holder in a small turning radius of the formwork, the boss 50 remains attached to the formwork io60 with normal force. It can be removed from the mold and no chipping occurs on the surface of the concrete. In other words, even a concrete product in which an insert is buried using a boss can be demolded in the same process as a concrete product in which no insert is buried. The quality of concrete products does not deteriorate.
• Such a state, or a state close to this, that is, a state in which the mounting portion is deformed due to the angular portion even though the angular portion is not cut, is as follows. Since the insert retainer is firmly attached to the boss, concrete can be poured into the formwork or vibrated by the vibrator.
• the insert holder 40 of this example is made of resin and used together with the insert 1 while being buried in a concrete product. However, it does not matter that a part of the insert holder 40 is scraped off at the time of demolding. Even if the insert holder is made of resin and a part of it is cut off, the insert holder can be installed in the opening of the insert to prevent the insertion of the insert, and the insert holder The outer cylinder allows the contour of the opening of the insert to be clearly defined, and also prevents the chipping.
• a gap 34 is provided on the insert holder 40 where a new product is buried for each concrete product, where the concrete can easily be clogged. Therefore, even if the slack of the concrete enters through the minute gap between the tip 36 of the outer cylinder and the inner surface 62 of the mold, it does not accumulate in the gap 34. For this reason, a reliable and stable effect of the present invention can be expected without troublesome cleaning.
• the boss to which the insert holder is attached is structured so that it can be easily fixed to a durable formwork by using bolt nuts.
• the same metal as the durable formwork can be used. Therefore, the boss of the present invention is highly durable as a setting tool, can maintain the same life as the form once it is mounted on the form, and does not require maintenance such as troublesome adjustment. In addition, since a complicated mechanism is unnecessary, it can be provided at low cost.
• an insert holder having an outer cylinder portion and an inner cylinder portion, and further having a portion that mates with the boss in the inner cylinder portion is described as an example. Even if the inner surface of the inner cylinder part is set in close contact with the boss body, the clearance between the inner cylinder part and the boss and concrete product can be removed by providing a gap outside the inner cylinder part. Interference can be suppressed. In addition, even if an outer cylinder is not provided, a concrete buried object that has a portion that engages with the boss can be set using the short boss body. There is little dryness. If the insert is buried at a smaller turning radius than before, for example, up to about 20 cm, these types of concrete buried objects can be used for simple demolding work.
• the insert holder has both the outer cylinder and the mating part as in this example, it can be installed in a place with a smaller turning radius, for example, near the base plate. Even if an insert is set, demolding work can be performed without any special work without problems such as chipping, and high-quality concrete products can be easily manufactured.
• the insert holder 40 of this example is also substantially cylindrical in its entirety, and can hold a hexagonal high nut 120 with an anchor 125 attached to one end as an insert. Meanwhile, the inner surface of the holding side 41 is hexagonal.
• the setting side 30 connected to the holding side 41 via the stop part 42 protruding inside has an outer cylinder part 35 also serving as the body of the insert holder 40, and the outer cylinder part 35. It is composed of four projections 80 projecting inside the insert holder.
• FIG. 5 shows a state in which the insert holder 40 of the present example is viewed from the distal end side 36 of the outer cylindrical portion 35.
• the four projections 80 are arranged at substantially equal intervals inside the outer cylinder 35, and the outer cylinder 3 narrows toward the tip 32 and the stop 42 of the projection 80.
• the inner surface of No. 5 forms a recess 33 whose shape matches the projection of the boss body described later.
• These projections 80 are formed so as to be retracted from the distal end 36 of the outer cylindrical portion, and these constitute the mounting portion 39.
• the boss 50 of this example is provided with a thin disk-shaped boss body 51 similarly to the above example, and the boss body 51 is provided with a projection 52.
• the protrusion 52 in this example is a truncated cone that gradually spreads from the edge 53 toward the mold frame 60, and is substantially perpendicular to the outer periphery of the boss body at almost the center in the thickness direction of the boss body 51. It is thin.
• a groove 56 is formed between the projection 52 and the inner surface 62 of the mold, and the groove 56 and the projection 8 of the sensor holder are formed. 0 interlocks.
• a so-called Mine-ya type in which a vertical surface 54 has a reverse slope and a surface inclined from the protrusion 52 toward the edge 53, is provided. There is something.
• the protrusion 80 that protrudes inward from the outer cylinder 35 serves as an attachment portion, and the boss 50 is sandwiched from all sides
• the insert 80 is set in the mold 60 by fitting the projection 80 into the groove 56 between the projection 52 and the inner surface of the mold.
• the distance between the groove 56 and the surface 62 of the mold is shorter than the distance between the protrusion 80 and the tip 36 of the outer cylinder.
• the surface 62 of the formwork is pressed, and concrete does not enter from this part. As a result, a space in which the concrete does not enter can be maintained inside the outer cylindrical portion, and the projecting portion 80 projects into the space.
• the protrusion 80 of this example is designed so that its thickness and shape have elasticity, and the insert holder is made of resin as in the above example. It is easy to fit in and hard to come off.
• a deformable space is provided around the protruding portion 80 by the outer cylindrical portion 35, so that the protruding portion 80 changes without interfering with the concrete.
• the boss 50 comes off without interfering with the surface of the concrete product. For this reason, similarly to the above example, even if the insert is set in a place with a small turning radius, the concrete product can be easily removed without damaging it. Also, since the boss 50 is tapered toward the tip, the interference when turning is small.
• bosses 80 are used to sandwich the boss, but the number of projections is not limited to four.
• the inside of the outer cylinder 35 is required. A sponge may be packed.
• FIG. 6 shows a concrete buried object according to the second embodiment of the present invention.
• the concrete buried object in this example is a resin insert 20 to be buried in a concrete product.
• the insert 20 of this example is provided with a main body 22 having a female screw portion 21 formed in a substantially cylindrical hollow inside, and one end of the main body 22 extends to the outside of the main body. It is closed by the widened bottom wall 23.
• a plurality of ribs 24 which reinforce from the main body 22 to the bottom wall 23 and prevent the insert 20 from idling in the concrete product. Have been.
• the other end of the insert body 22 is a setting side 30 for setting the insert 20 to the formwork 60.
• a substantially cylindrical outer cylindrical portion 35 extending from the main body 22 and a substantially cylindrical outer portion 35 extending inside the outer cylindrical portion 35 are provided.
• An inner cylinder portion 31 is provided.
• the inner cylinder portion 31 of this example is provided with a single projection 38 extending in the circumferential direction inside the inner cylinder portion, and the inside of the inner cylinder portion serves as a mounting portion 39.
• the boss 50 in this example is provided with a thin disk-shaped metal boss body 51, and the boss body 51 is an inverted truncated cone whose entire width is reduced from ⁇ 53 toward the formwork 60. It is. And a small-diameter bolt 55 is attached to the narrow side.
• a spring washer 58 is inserted between the nut 59 and the rear surface 63 of the mold 60, and the spring washer 58 can be deformed with elasticity.
• Fig. 8 (a) with the nut 59 tightened up to this point shows the state where the insert 20 of this example is installed on the formwork
• Fig. 8 (b) shows the state where the insert 20 is removed. is there.
• the tip 36 of the outer cylindrical portion of the insert 20 is in close contact with the inner surface 62 of the formwork to prevent the concrete from entering through the outer cylindrical portion 35.
• the configuration on the setting side of the insert 20 of this example is almost the same as that of the above-described embodiment, and as with the insert holder described above, even a single worker can easily and reliably insert.
• G 20 can be mounted on the formwork 60.
• the insert 20 since the insert 20 is set with sufficient adhesive strength, the insert does not drop off or tilt as in the above example because the engagement with the boss body is loose. .
• the boss 50 is attached to the formwork 60 via the spring washer 58 as in this example, and the spring washer 58 has elasticity. Otherwise, when the mold 60 is turned, the boss 50 swings. For this reason, the inclination between the center axis of the boss body 50 and the center axis of the insert 20 becomes small, and troubles during detachment are less likely to occur.
• the insert 20 is of a type in which a gap 34 is provided outside the inner cylindrical portion 31 as in this example, it can be used together with a setting tool having a thin boss body as in this example. Thus, the insert can be set in a region having a small turning radius without inserting the spring washer 58.
• the boss body 51 is long even if there are gaps on the outside of the setting section and there is a gap, use a spring washer as shown in this figure to further rotate
• the range in which the insert can be set to a region with a small radius can be extended.
• the spring washer may be inserted into the front side 62 of the formwork instead of being inserted into the backside 63 of the formwork as in this example.
• the boss body 51 When the boss body 51 is attached to the formwork by a bolt penetrating itself, the boss body 51 may be inserted into the edge 53 side.
• a plurality of spring washers may be inserted using these positions in combination.
• the insert is not buried even if the insert is set in a place where the turning radius of the formwork is small, such as near the baseboard.
• demolding work can be performed without problems such as chipping of the concrete surface, and high-quality concrete products can be easily manufactured.
• FIGS. 9 and 10 show different examples of the insert according to this embodiment.
• the insert main body 22 and the outer cylinder 35 are manufactured as separate parts, and these are set when setting the formwork 60. They are assembled.
• the outer cylinder part 35 is provided with an upper wall 37 extending inward at the end opposite to the distal end 36, and an insert 20 is provided at the center of the upper wall 37. A hole approximately equal to the outer diameter is drilled.
• an outwardly extending projection or flange-like stopper 25 is prepared on the outer peripheral surface of the setting side 30 of the insert main body 22.
• the stopper 25 may be formed over the entire outer peripheral surface of the insert main body 22 or may be formed at regular intervals along the outer peripheral surface of the insert main body 22.
• the insert main body 22 extends to the setting side 30 to form an inner cylindrical portion 31.
• a straight groove 3 3 is formed inside the inner cylindrical portion 31.
• the insert body 22 provided with the inner cylinder part 31 and the outer cylinder part 35 have the relation of the position of the front end and the position of the front end and the groove when these are combined in the above embodiment. Is the same as Therefore, the insert 20 of this example can also be easily and reliably set by one worker, and when the insert 20 is set on the mold, the tip 36 of the outer cylindrical portion 35 comes into close contact with the mold 60.
• the protrusion 52 of the boss body 51 in this example is a chevron that gradually spreads outward from the edge 53 of the tip of the boss 50, and is further separated into multiple pieces along the outer periphery of the boss body. It is.
• the shape of the groove 33 provided in the inner cylindrical portion 31 of the insert 20 is also mountain-shaped.
• the portion 57 where the projection 52 is cut is drawn laterally for the sake of illustration, but as in the previous embodiment, the formwork 60 extends from above about a pivot axis perpendicular to the drawing. When turning downward, it is desirable to attach the boss body so that the cut portion 57 is oriented vertically in the drawing.
• a gap 34 can be formed between the outer cylinder section 35 and the inner cylinder section 31, and concrete does not enter the gap 34. Therefore, in the case of the insert of the present embodiment, even if the mold 60 is turned and removed from the mold in the same manner as in the above-described embodiment, the insert 20 does not become an obstacle to the removal of the insert, and the insert 20 may be broken. No trouble occurs. Further, since the boss 50 of the present example is tapered toward the front end, it is easy to insert the insert. On the other hand, when the boss 50 turns, there is little interference with the tip 3 2 of the inner cylindrical portion 3 1, so that the boss 50 can easily come off. Therefore, trouble such as chipping can be easily prevented, which is suitable for setting an insert at a place where the turning radius is small.
• FIGS. 11 and 12 show, as a third embodiment of the present invention, a concrete embedded sleeve 100 of adjustable length.
• the sleeve 100 of this example is provided with a cylindrical main body 101 made of resin, and one end of the main body 101 can be expanded and contracted while being in contact with the inner surface 102 of the main body 101. It has a cylindrical slide part 103.
• the leading end 104 of the slide portion 103 extends in a flange shape so that it can be applied to another formwork 69.
• a stopper 105 is provided inside the main body 101 so that the slide portion 103 does not protrude toward the mounting portion 30.
• the other end of the main body 101 is the setting side 30.
• a sponge 70 is wound around the outside of the main body 101 in a belt shape to form an exterior.
• a single groove 33 is provided on the inner surface of the setting side 30 of the main body 101, and the inner surface of the main body 101 serves as a mounting portion.
• the tip 3 6 of the strip-shaped sponge 70 is --
• the sponge 70 When the sleeve 100 is set to the formwork 60 when the sleeve 100 is set to the formwork 60, the sponge 70 is pressed against the inner surface 62 of the formwork. The slant of the concrete is prevented from entering the inside of the sleeve 100. Also, concrete does not enter the sponge 70. Therefore, when removing the formwork, the tip 32 of the main body 101 deforms to compress the sponge 70, preventing interference between the boss and the concrete product. I do. Instead of the sponge 70, an elastic body such as rubber or cardboard may be wrapped to form a region where the tip of the main body 101 can be deformed so that the concrete does not enter. .
• an elastic body such as rubber or cardboard may be wrapped to form a region where the tip of the main body 101 can be deformed so that the concrete does not enter. .
• the boss body 51 of this example is made of metal, and is attached to the formwork 60 by a bolt 55 penetrating therethrough.
• the shape of the boss body 51 is an inverted frustoconical shape that extends from the side of the formwork 60 toward the edge 53 of the tip, and the edge 53 is a groove provided on the inner surface of the sleeve 100.
• the sleeve 100 can be set to the formwork 60 in combination with 33.
• the bolt 55 is attached via two spring washers 58, one of which is located at the end 53 of the boss body 51, and the other one is the same as in the second embodiment. It is inserted into the backside 63 of the formwork.
• the boss body 51 is attached from the outside of the spring washers 58 by nuts 59, and at this time, the plurality of spring washers 58 have elasticity respectively. Nut 5 9 is tightened.
• the diameter of the hole 61 provided in the formwork 60 is slightly larger than the diameter of the bolt 55 so that the inclination of the bolt 55 changes when the mold is removed. .
• the hole 61 is small when compared to the inner diameter of the sleeve 100, so that the concrete does not leak even if the boss 50 is removed, as in the above example, or tape. It is a hole with a diameter that can be easily closed by such as
• the sleeve 100 When the sleeve 100 is set for such a boss 50, the groove 53 of the sleeve 100 and the groove 53 of the boss body 51 are engaged with each other. Same as The sleeve 100 is set on the inner surface 62 of the form with sufficient adhesive force as described above. When the mold 60 is swiveled and removed, the tip 32 of the sleeve 100 is deformed inside the sponge 70, so that the boss may interfere with the concrete product. Instead, the sleeve can be set even in a place where the turning radius of the formwork is small. Then, as in the case of concrete products without embedded sleeves, demolding work can be performed without any trouble. Products can be manufactured.
• Figure 12 shows a cross section of a concrete product in which the sleeve 100 is embedded.
• the sleeve of this example can be easily installed on the formwork, and a hole for penetrating the concrete product can be easily prepared at a predetermined position. And, as mentioned above, even if the sleeve is set on the formwork, it will not be an obstacle for demolding. Therefore, it is possible to manufacture a concrete product with holes inexpensively in a small number of manufacturing steps. In addition, since the length of the sleeve can be easily adjusted by the sliding part 103, even when manufacturing concrete products with different wall thicknesses, the types of sleeves that are prepared in advance are different. Fewer is good.
• FIGS. 14 and 15 show a plug 90 for setting the insert 1 as a third embodiment of the present invention.
• the plug 90 is made of plastic or other resin, is inserted through the opening 2 of the insert 1 embedded in the concrete product, and uses the female screw 2a prepared inside the hollow. It can be installed in opening 2. For this reason, a male screw 91 is provided on the surface of the plug 90 from the substantially center to one end.
• This male screw 9 1 is a hollow 9 0--
• the other end of the plug 90 is on the setting side 30 and forms a cylindrical space 95 separated by a hollow portion 98 and a partition wall 92.
• the partition wall 92 is provided with a groove 93 into which a jig such as a screwdriver can be fitted, so that the plug 90 can be easily removed when using an insert as described later.
• a cylindrical inner cylindrical portion 31 protrudes from the partition wall 92 toward the formwork 60, and a gap 34 is formed outside the inner cylindrical portion 31.
• the setting side 30 of the plug 90 becomes the outer cylinder portion 35, and the inner cylinder portion 31 is formed therein.
• a groove 33 is formed on the inner surface of the inner cylinder portion 31, and this inner surface serves as a mounting portion 39.
• the groove 33 in this example is divided into a plurality of portions, and each groove is formed so as to slightly protrude from the inner surface of the inner cylindrical portion 31.
• the outer peripheral surface 94 of the plug 90 that becomes the outer cylindrical portion 35 is narrowed in a truncated cone shape from the mold frame 60 toward the insert 1, and the plug 90 is inserted from the insert 1. When extracting, it does not interfere with concrete products.
• a plug with a hollow on the setting side and the insertion side can be designed according to the inner diameter of the insert and the diameter of the boss body, and the wall thickness of the plug is also molded. It can be designed to have an appropriate thickness in consideration of distortion at the time. Further, since the height of the boss body is low, the partition wall 92 can be formed relatively close to the surface of the concrete product, and the groove 93 for the driver can be easily used.
• the boss 50 of the present example includes a thin disk-shaped boss main body 51, and a straight projection 52 is formed along the outer periphery of the boss main body. Therefore, when the boss 50 is attached to the mold frame 60 with the nut 59, and the plug 90 is fitted into the boss 50, the protrusion 52 of the boss body and the groove 33 of the plug 90 are opened. Together, there is enough additional information to set Insert 1 as in the previous example. Strength is obtained. At this time, since the relationship between the distal end 32 of the inner cylindrical portion 31, the distal end 36 of the outer cylindrical portion 35, and the groove 33 is set in the same manner as in the above embodiment, the outer cylindrical portion 31 The tip 36 of the mold comes into close contact with the back surface 62 of the form, and the gap 34 is secured. When the mold is removed, the inner cylindrical portion 31 of the plug 90 is deformed inside the gap 34, so that there is no interference between the boss 50 and the concrete product. It can be removed smoothly without removing 50.
• Figure 14 shows the removal of plug 90 to use insert 1 embedded in a concrete product.
• insert 1 is set as a mold using plug 90, and when the mold is removed, concrete product with plug 90 attached to embedded insert 1 is attached. Is manufactured. By keeping the concrete product with the plug 90 attached and transporting it to the site, it is possible to prevent rainwater and dust from entering the interior of the insert 1.
• a jig such as a screwdriver 96 can be inserted from the setting side 30 into the groove 93 provided in the partition wall 92 of the plug 90.
• the concrete embedded object and the setting tool according to the present invention can be used even in a place where the turning radius of the form when the mold is removed is small. Concrete buried objects such as inserts can be set, and concrete products without chipping can be provided at low cost.
• the buried object of the present invention When setting the concrete buried object of the present invention, a large space such as swinging a hammer is not required, and the buried object can be set at a place close to the base of the formwork. There is no need to limit the embedding location for factory prefabricated products. Also, since the setting position can be easily changed, it is possible to flexibly respond to changes in design and embedding in a location suitable for individual products. Furthermore, even one worker can efficiently set concrete buried objects, and even when removing the concrete, there is no concrete buried object It takes the same time and effort as products. Accordingly, high value-added concrete products can be provided at low cost.
• the structure of buried objects such as inserts and bosses are simple, and especially, bosses do not need to be replaced or adjusted and are highly durable. It is suitable for producing concrete products.
• the concrete buried object and the setting tool of the present invention are suitable for manufacturing a buried product such as an insert using a durable formwork. It can provide high-quality concrete products with inserts buried in places.

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
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• Structural Engineering (AREA)
• Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
• Joining Of Building Structures In Genera (AREA)

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Cited By (6)

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• 1994
  • 1994-12-02 TW TW83111211A patent/TW258772B/zh active
  • 1994-12-02 WO PCT/JP1994/002037 patent/WO1995016140A1/ja active Application Filing

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