WO2004094745A1 - Pc鋼材の定着用ウェッジ - Google Patents
Pc鋼材の定着用ウェッジ Download PDFInfo
- Publication number
- WO2004094745A1 WO2004094745A1 PCT/JP2004/000784 JP2004000784W WO2004094745A1 WO 2004094745 A1 WO2004094745 A1 WO 2004094745A1 JP 2004000784 W JP2004000784 W JP 2004000784W WO 2004094745 A1 WO2004094745 A1 WO 2004094745A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- edge
- annular portion
- fixing
- steel material
- projection
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
- E04C5/122—Anchoring devices the tensile members are anchored by wedge-action
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- 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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
- F16G11/04—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with wedging action, e.g. friction clamps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
- F16G11/04—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with wedging action, e.g. friction clamps
- F16G11/044—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with wedging action, e.g. friction clamps friction clamps deforming the cable, wire, rope or cord
- F16G11/048—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with wedging action, e.g. friction clamps friction clamps deforming the cable, wire, rope or cord by moving a surface into the cable
Definitions
- the present invention relates to an edge used for fixing an end of a PC steel material in a PC structure.
- a structure using an edge and an anchor disk is known (for example, Japanese Patent Application Laid-Open No. 8-68158 (FIG. 4)). reference).
- this anchoring structure as shown in FIG. 20, for example, the outer circumference of a plurality of PC steel strands 30 is covered with inner and outer trunks 41 and 42, and a rib cast is provided on the end face side of the concrete structure 60. This is the arrangement of Toanka 43.
- An anchor disc 46 is arranged on the rib cast anchor 43.
- the anchor disk 46 is a disk-shaped one having a plurality of through-holes of the PC steel strand 30, and a part of the through-hole is formed in a tapered shape so that a wedge 10 described later is fitted therein. .
- the edge 10 of the PC stranded wire 30 is attached with the edge 10. ⁇ ⁇ ⁇
- the edge 10 is formed into a truncated cone by combining a plurality of divided pieces 11. In the state where the divided pieces 11 are combined, a circular hole extending in the axial direction is formed at the center of the edge 10.
- the PC steel stranded wire 30 is gripped by the lower edge 10 in this circular hole.
- the divided pieces 11 are united by a rubber or steel restraining ring 20 so as not to be separated.
- the constraining ring 20 is, for example, a frusto-conical combination. It is.
- PC steel stranded wire with the edge attached is given a predetermined tension with a jack, and the edge is fixed by inserting the edge into the through hole of the anchor disc under this tension. Disclosure of the invention
- the edge is composed of a combination of a plurality of divided pieces. ⁇ After fixing the edge, (1) uniform in the longitudinal direction,
- the edges of the split pieces are fixed after the edges of the split pieces are uniformly aligned by the additional force of the fixing plate of the jack during the tensioning operation, so the edges are arranged substantially uniformly in the longitudinal direction.
- the edges are arranged substantially uniformly in the longitudinal direction.
- it is difficult to arrange them evenly after fixing. This is because the edge once rises from the anchor disk during tension.
- the split piece 11 may shift in the circumferential direction by moving inside the binding ring 40 fitted on the outer periphery of the outer ring, and may remain in the shifted state after fixing as shown in FIG. Even if the divided pieces are evenly arranged using a tool such as a screwdriver before tensioning, it is difficult to maintain a uniform arrangement shape because the edge once rises during tensioning.
- the main object of the present invention is to fix the PC steel material by uniformly distributing the divided pieces on the outer periphery of the PC steel material, thereby preventing bias of the applied stress applied to the PC steel material. ⁇ ⁇ To provide an edge.
- the present invention achieves the above object by devising a form of a restraining ring for retaining a divided piece of an edge.
- the fixing edge of the PC steel material of the present invention is a fixed edge of the PC steel material that is formed in a conical shape by combining a plurality of divided pieces and grips the PC steel material, wherein the divided pieces are conical. It is provided with a restraining ring for holding, and the restraining ring is characterized in that it has a projection that fits into a gap between the divided pieces.
- a gap is formed between the divided pieces.
- each divided piece can move in the circumferential direction of the PC steel by the amount of this gap, resulting in uneven arrangement.
- a projection is formed on a restraining ring that holds the divided piece in a conical shape, and the projection is configured to fit into the gap between the divided pieces.
- this ⁇ edge is formed into a truncated cone when the divided pieces are combined. That is, each of the divided pieces has a fan-shaped cross section orthogonal to the axial direction of the edge.
- the divided pieces when they are combined, they form a circular hole inside to form the contact surface with the PC steel.
- an angled tooth is formed on the inner surface of the split piece and the PC steel material is tensioned and fixed, the tooth bites into the PC steel material to bear the load introduced into the PC steel material.
- the number of divided pieces is not particularly limited. Generally, it is about 2 to 3 pieces.
- An annular groove is formed on the outer periphery of the large diameter side of each divided piece, and the constraining ring is held at the edge using the annular groove.
- the restraining ring usually includes an annular portion and a projection protruding from the annular portion. Have. Both closed and open rings are available. Further, the annular portion may be disposed on the outer peripheral surface of the edge, or may be disposed on the large-diameter end surface of the edge.
- the closed ring examples include a ring made of an elastic body such as a rubber ring, a metal ring, and the like.
- a rubber ring insert it into the annular groove on the outer edge of the edge with the diameter of the rubber ring expanded so that it can be expanded.
- the projection is formed so as to project toward the inner peripheral side of the annular portion.
- the projection may have the same thickness as the annular portion.
- a protrusion may be formed by integrally forming a block portion on the large-diameter side of the circular portion and projecting a part of the block portion toward the inner peripheral side of the circular portion. In the case of forming the block, the contact area with the divided piece can be increased by this block, and the arrangement of the divided pieces in the circumferential direction can be more reliably and evenly maintained.
- the annular part is fitted into the annular groove on the outer periphery of the edge.
- the annular portion is formed into an annular shape while being bent in a bellows shape. It is mentioned.
- the annular portion is preferably formed into an annular shape using a band-shaped metal plate.
- the metal ring Since the metal ring has a spring effect due to the bellows portion, (1) it can be inserted from the small diameter portion of the edge, and (2) can be fitted into the annular groove on the outer periphery of the edge while the diameter of the metal ring is expanded.
- the metal ring When the metal ring is formed in a bellows shape, a part of the bent portion can be largely bent toward the inner peripheral side of the ring portion to form a projection.
- the metal ring is provided with an engaging portion for holding the annular portion on the end face on the large diameter side of the edge.
- a specific example of the engaging portion is an elastic protruding piece that extends substantially in the axial direction from the outer peripheral edge of the annular portion and has elasticity in the radial direction of the annular portion.
- the closed annular portion when configured to be held on the large-diameter end surface of the edge, a hole through which the holding pin is inserted is formed in the annular portion, and the annular portion is formed on the edge with the hole. It may be an engaging portion for engaging.
- the retaining pin is passed through the engaging portion, and the retaining pin is fixed to the large-diameter side end surface of the left edge, whereby the engaging portion is retained on the wedge via the retaining pin.
- the annular portion may be a metal ring or a plate-like rubber ring.
- the protrusion can be formed by a protrusion formed on the annular portion by protruding toward the ⁇ edge thinner side. This projection is fitted into the gap between the divided pieces.
- This protruding body may have a cylindrical shape or a cylindrical shape.
- the protruding body must be deformed between the split pieces at the time of edge fixing. Therefore, it is preferable that the protruding body is formed of a deformable metal such as aluminum when forming a cylindrical shape, and is formed of an elastic material when forming a cylindrical shape.
- examples of the open annular portion include those obtained by forming a long body such as a linear body or a band into an annular shape.
- a long body having one end and the other end may be formed in an annular shape, and a projection that fits into a gap between the divided pieces may be formed continuously with the long body.
- the long body is a linear body such as a metal wire, and this linear body is bent.
- the linear body is bent to form an annular shape such that one end and the other end are overlapped, and a projection that fits into the gap between the divided pieces is formed by bending the linear body.
- the elongated body is a belt-like body, and this belt-like body is formed into an annular shape with one end and the other end spaced apart from each other, and a projection that fits into the gap between the divided pieces is also integrally formed with the aforementioned belt-like body. May be.
- a jig mounting portion for opening and closing the both ends at one end and the other end of the strip.
- the long body is formed of a strip and formed into an open annular portion
- two strips may be attached to the annular groove of the divided piece so that the ends do not overlap.
- the constraining ring becomes an annular state that is closed in the circumferential direction as a whole, and the divided pieces can be more reliably and evenly arranged. Can be.
- a belt-like body is formed into a ring shape, and a block body made of an elastic material is formed so as to protrude toward the large-diameter side of the edge of the belt-like body.
- a projection that fits into the projection may be formed.
- the annular portion is formed of a long body having one end and the other end, and since both end portions are not continuous with each other, the diameter of the annular portion is increased.
- a restraining ring can be attached to the annular groove of the edge.
- the shape of the projection is not particularly limited.
- the number of protrusions is provided according to the number of divided pieces. For example, if there are three divided pieces, three gaps can be formed between the divided pieces, and therefore the number of protrusions is also three.
- the arrangement of the protrusions is It is performed so as to be even in the circumferential direction of the ring.
- the protrusion may be formed so as to protrude toward the inner peripheral side of the annular portion, or may be formed so as to project obliquely from the outer periphery of the annular portion toward the center direction, It may be formed so as to protrude from the annular portion in the axial direction.
- the restraining ring As a constituent material of the restraining ring, a flexible material such as rubber is suitable. When the PC steel is fixed, the protrusions are deformed due to the gap between the divided pieces, but the arrangement of the divided pieces in the circumferential direction is maintained evenly.
- the restraining ring may be made of metal or plastic.
- the edge of the present invention can be applied not only to bare PC steel strands but also to PC steel strands provided with a resin coating such as epoxy resin.
- the divided pieces can be uniformly arranged on the outer periphery of the PC steel material and uniformly in the longitudinal direction only by changing the specification of the restraining ring. Therefore, the PC steel material can be held evenly, and the performance of the fixing portion can be improved. Also, the tensioning work for PC steel is no different from the conventional method using a ⁇ edge, and there is no need to tension using special tools or equipment.
- FIG. 1 (A) is an end view of an edge of the present invention
- FIG. 1 (B) is a side view thereof
- FIG. 2 is a plan view of a restraining ring according to a first embodiment used for an edge of the present invention
- FIGS. 3A and 3B are explanatory views showing a holding state of the PC steel strand by the edge of the present invention.
- FIG. 3A shows a state before the tension of the PC steel strand
- FIG. 3B shows a state during the tension
- FIG. 4 (A) is a plan view of a restraining ring made of an elastic material according to the second embodiment, (B) is a cross-sectional view taken along line AA, and (C) is a cross-sectional view taken along line BB.
- FIG. 5 is an explanatory view showing a state where the restraining ring of FIG. 4 is attached to a ⁇ edge.
- FIG. 6A is a plan view of the clip-shaped restraining ring according to the third embodiment, and FIG. Is a front view, and (C) is a right side view.
- FIG. 7 is an explanatory view showing a state in which the restraining ring of FIG. 6 is attached to an edge.
- FIG. 8A is a plan view of the plate-shaped restraining ring according to the fourth embodiment
- FIG. 8B is a cross-sectional view
- FIG. 9 is an explanatory view showing a state in which the restraining ring of FIG. 8 is attached to a ⁇ edge
- FIG. 11B is a cross-sectional view
- FIG. 12 is an explanatory view showing a state in which the restraining ring of FIG. 11 is attached to a lower edge.
- FIG. 13 (A) is a plan view of the bellows-like restraining ring according to the sixth embodiment
- FIG. 13 (B) is a cross-sectional view
- FIG. 14 is an explanatory view showing a state in which the restraining ring of FIG. 13 is attached to a ⁇ edge
- FIG. 15 is an explanatory diagram showing a state in which the restraining ring of FIG. 13 is attached to an edge.
- FIG. 16 (A) is a plan view of a restraining ring which can be mounted from the end face side of the edge according to the seventh embodiment
- (B) is a cross-sectional view along AA
- (C) is a cross-sectional view along BB.
- FIG. 17 is an explanatory diagram showing a state in which the restraining ring of FIG. 16 is attached to the left edge.
- FIG. 18 (A) is a plan view of a plate-shaped restraining ring according to Example 8, and FIG. 18 (B) is a cross-sectional view.
- FIG. 19 is an explanatory diagram showing a state in which the restraining ring of FIG. 18 is attached to an edge.
- FIG. 20 (A) is a cross-sectional view showing the anchoring structure of the PC steel strand
- FIG. 20 (B) is an enlarged view of the broken line portion in FIG.
- Fig. 21 is an explanatory view showing the conventional holding state of the PC steel strand by the ⁇ edge.
- (A) shows the state before tension of the PC strand
- (B) shows the state during tension
- (C) shows the state after fixing. .
- the edge 10 is composed of three divided pieces 11 as shown in FIG. I'm wearing
- Each of the divided pieces 11 has a substantially fan-shaped cross section, and one end is formed in a tapered shape having a large diameter and the other end having a small diameter. Combining the three split pieces 1 1 forms a nearly truncated cone.
- the divided piece 11 has a sectoral section having an arc surface.
- the inner surface of this split piece will be the contact surface with the PC stranded wire, and by combining the split pieces 11, a circular hole for holding the PC stranded wire will be formed. Further, the split pieces were formed with chevron-shaped teeth 14 on the inner surface so that the strands of PC steel could be held more firmly.
- annular groove 15 is formed on the outer periphery on the large diameter side of the edge 10.
- a constraint ring described later is fitted into the annular groove 15.
- FIG. 2 shows a plan view of the restraining ring 20.
- the restraining ring 20 is a rubber O-ring having three protrusions 21 on the inner circumference.
- the restraining ring 20 is formed in a plate shape so as to have the same thickness as a whole including the protrusion 21.
- Each protrusion 21 is fitted between the divided pieces when the divided pieces 11 (see FIG. 1) are combined.
- the restraining ring 20 is fitted into the annular groove 15 of the ⁇ edge (see the same figure), and the projection 21 is simultaneously fitted between the divided pieces 11.
- each split piece is evenly arranged by the projection 21 of the restraining ring 20 before the tension of the PC steel stranded wire 30.
- the uniform arrangement of the divided pieces 11 can be maintained as it is.
- the protrusions are compressed and deformed, but the arrangement of the split pieces is maintained uniformly (see (C)). Therefore, a uniform additional stress can be applied to the PC strand.
- the above-mentioned ⁇ edge is also common to the conventional ⁇ edge in that it is used for the fixing structure in FIG. 20 (A) and the like.
- this anchoring structure the outer periphery of a plurality of PC steel strands 30 is covered with inner and outer trumpet bodies 41 and 42, and concrete
- the rib cast anchor 43 is arranged on the end face side of the structure 60.
- Recess tubes 44 are attached to the ends of the inner and outer trumpet bodies 41, 42.
- Spiral streaks 45 are arranged on the outer peripheries of the inner and outer transit bodies 41 and 42 and the rib cast anchor 43.
- An anchor disc 46 is arranged on the rib cast anchor 43.
- the anchor disk 46 is a disk having a plurality of through-holes of the PC steel strand 30. A part of the through-hole is formed in a tapered shape so that the above-mentioned edge 10 is fitted therein. I have. Then, the ends of the anchor disc and the PC strand are covered with a grout cap 47.
- Tension and anchorage of the PC steel strand are performed, for example, by the following procedure.
- the fixing structure shown in FIG. 20 (A) is an example of a fixing structure using a ⁇ edge.
- a restraining ring also composed of a rubber ring, was used based on Fig. 4. Will be described.
- Fig. 4 (A) is a plan view of the restraining ring, (B) is a cross-sectional view of AA in (A), and (C) is a cross-sectional view of BB.
- the constraining ring 20 has an annular portion 22 and a block portion 51 integrally formed on the large-diameter side of the edge of the annular portion 22, and a part of the block portion 51 is formed on the inner peripheral side of the annular portion 22.
- a projection 21 To form a projection 21.
- Three block portions 51 are formed in the annular portion 22 at equal intervals. In this example, three block portions 51 were formed at 120 ° intervals.
- a projection 21 is formed on the inner peripheral side of the annular portion 22 of the block portion 51.
- FIG. 5 shows a state in which the restraining ring 20 is attached to the edge 10.
- the restraining ring 20 is mounted by fitting the annular portion 22 into an annular groove 15 provided on the outer periphery of the large diameter side of the ⁇ edge.
- Each projection 21 is fitted between the divided pieces by the attachment of the annular portion 22 to the annular groove 15.
- This restraining ring can also prevent the non-uniform arrangement of the divided pieces in the circumferential direction, as in the first embodiment shown in FIG. Furthermore, since the contact area with the divided pieces can be increased by the block portion 51, the arrangement of the divided pieces in the circumferential direction can be more reliably and uniformly maintained.
- FIG. Fig. 6 (A) is a plan view of the clip-shaped restraining ring, (B) is a front view, and (C) is a right side view.
- This restraining ring bends one metal wire to form an annular restraining ring. That is, the metal wire is bent in a circular shape so that one end and the other end of the metal wire overlap each other to form an annular portion 22, and further, the middle of the annular portion 22 is bent into a U-shape to form the center of the annular portion ⁇ .
- a projection 21 is formed toward the side. In this example, three protrusions 21 were formed at 120 ° intervals.
- FIG. 7 shows a state in which the restricting ring 20 is attached to the edge 10.
- This ⁇ is attached by fitting into the annular groove 15 provided on the outer periphery of the large diameter side of the edge.
- One end and the other end of the metal wire forming the restraining ring 20 are merely overlapped without being continuous. Therefore, by expanding the annular portion 22 toward the outer circumferential side, the restraining ring 20 is mounted on the outer circumference of the edge 10. You can wear it.
- the annular portion 22 is fitted into the annular groove 15 of the ⁇ edge, and the projection 21 is interposed between the divided pieces.
- This restraining ring can also prevent the non-uniform arrangement of the divided pieces in the circumferential direction, as in the first embodiment shown in FIG.
- FIG. 8 (A) is a plan view of the restraining ring
- FIG. 8 (B) is a sectional view.
- This constraining ring is formed by stamping a metal plate and integrally forming a belt-shaped annular portion 22 and a projection 21 protruding inside the annular portion 22.
- the annular portion 22 has a space between one end and the other end of the belt-like body, and has an opening 25 at a part in the circumferential direction.
- a circular hole 26 was formed at one end and the other end of the strip.
- An appropriate jig is inserted into the circular hole 26 to be used for expanding the interval between the openings 25.
- the protrusion 21 is a tongue piece protruding from the annular portion 22 toward the center.
- three projections 22 were provided at intervals of 120 °. In the case where the interval between the openings 25 can be increased without providing the circular holes 26, the circular holes 26 may not be provided.
- FIG. 9 shows a state in which the restraining ring is attached to an edge.
- the restraining ring 20 is mounted by being fitted into an annular groove 15 provided on the outer periphery of the edge 10 on the large diameter side. Since the annular portion 22 constituting the restraining ring has the opening 25, the restraining ring 20 can be mounted on the outer circumference of the edge 10 by expanding the annular portion 22 toward the outer peripheral side. At that time, The part 20 is fitted in the annular groove 15 of the edge, and the projection 21 is interposed between the divided pieces.
- This restraining ring can also prevent the non-uniform arrangement of the divided pieces in the circumferential direction, as in the first embodiment shown in FIG.
- two restraining rings are attached to the annular groove 15 of the divided piece 11 by overlapping them at their ends, that is, so that the openings 25 do not overlap. You may do so.
- each end is closed by the other band, so that the constraining ring as a whole is closed in the circumferential direction and the split piece is It can be ensured that they are evenly arranged.
- FIG. 11 (A) is a plan view of the constraint ring
- FIG. 11 (B) is a cross-sectional view.
- This constraining ring is formed by stamping a metal plate and integrally forming a belt-shaped annular portion 22 and a protruding portion 27 protruding inside the annular portion 22.
- a block 52 made of an elastic material is fixed on the portion 22.
- the block body 52 is configured so as to protrude toward the large diameter side of the annular portion 22 when the annular portion 22 is attached to the ⁇ edge, and the projecting portion 27 formed on the block body 52 and the annular portion 22 is formed. This forms a projection 21 that fits into the gap between the divided pieces.
- three protrusions 21 are provided at 120 ° intervals.
- the annular portion 22 is provided with a space between one end and the other end of the belt-shaped body, and an opening 25 is formed in a part in the circumferential direction.
- FIG. 12 shows a state in which the restraining ring is attached to an edge.
- the binding ring 20 is mounted by fitting the annular portion 22 into an annular groove 15 provided on the outer periphery of the large diameter side of the edge 10. Since the annular portion 22 constituting the restraining ring has an opening 25, the annular portion 22 is expanded toward the outer peripheral side so that the restraining ring 20 can be attached to the outer circumference of the edge 10. Can be.
- the projection 21 is interposed between the respective split pieces.
- This restraining ring can also prevent the non-uniform arrangement of the divided pieces in the circumferential direction, as in the first embodiment shown in FIG. Further, since the block body is formed, the contact area with the divided piece can be increased by the block body, and the arrangement of the divided pieces in the circumferential direction can be more reliably and uniformly maintained.
- FIG. 13 (A) is a plan view of the constraint ring
- FIG. 13 (B) is a cross-sectional view.
- This constraining ring is formed by bending a metal band into an annular shape while bending it in a bellows shape. In this manner, a closed annular portion is formed by forming an annular shape. Then, a part of the bent portion of the annular portion is largely bent to the inner peripheral side to form the projection 21.
- FIGS. 14 and 15 show a state in which the restraining ring is attached to an edge.
- the restraining ring 20 is mounted by inserting the annular portion 22 from the small diameter side of the edge 10 and fitting it into the annular groove 15 provided on the outer circumference of the large diameter side. Since the annular portion 22 has a spring effect due to the bellows portion, the annular portion 22 can be fitted into the annular groove 15 on the outer periphery of the edge while the diameter of the annular portion 22 is extended.
- the protrusion 21 is interposed between the divided pieces.
- This restraining ring can also prevent the non-uniform arrangement of the divided pieces in the circumferential direction, as in the first embodiment shown in FIG. Furthermore, since the protrusion 21 is formed of a band having a predetermined width, the contact area of the protrusion 21 with the divided piece is smaller than that of the protrusion formed with the same thickness as the plate-like ring member as in the first embodiment. Can be larger. As a result, the arrangement of the divided pieces in the circumferential direction can be reliably and evenly maintained.
- FIG. 16 (A) is a plan view of the restraining ring, (B) is a cross-sectional view along AA, and (C) is a cross-sectional view along BB.
- the constraining ring 20 includes an annular portion 22, an engaging portion ⁇ for holding the annular portion 22 on the end face of the edge, a projection 21 interposed between the divided pieces of the edge, and And a positioning part 24 to be formed.
- Each of these components is made of a metal plate, and the engaging portion 23, the protrusion 21, and the positioning portion 24 are configured by bending a continuous protruding piece from the annular portion 22.
- the engaging portion 23 is a protruding piece that is protruded substantially in the axial direction from the outer peripheral edge of the annular portion 22 and that has a distal end bent in a V shape.
- the portion bent into the V shape is fitted into the annular groove 15 on the outer periphery of the edge, thereby holding the annular portion on the end surface on the large-diameter side of the edge.
- six engaging portions 23 are provided at 60 ° intervals.
- the protrusion 21 is a linear protrusion that projects obliquely from the outer peripheral edge of the annular portion 22 toward the center. This protruding piece is interposed between each of the pieces constituting the edge 10. In this example, three projections 21 were provided at 120 ° intervals.
- the positioning portion 24 is a linear protruding piece that forms a substantially rectangular notch in the inner peripheral edge of the annular portion 22, and extends substantially in the axial direction from the depth of the notch. The positioning portion 24 is inserted into a positioning hole 16 provided on the large-diameter end face of the edge, and holds the restraining ring 20 at an appropriate position with respect to the edge 10. In this example, three positioning portions 24 are provided at positions corresponding to the middle of each projection 21 at intervals of 120 °.
- FIG. 17 shows a state in which the restraining ring is attached to an edge.
- This restraint ring is attached from the end face on the large diameter side of the edge. That is, the positioning portion 24 is inserted into the positioning hole 16 on the edge surface of the ⁇ edge, and the engagement portion 23 is fitted into the annular groove 15 provided on the outer periphery of the ⁇ edge. At that time, the protrusion 21 is interposed between the divided pieces.
- This restraining ring can also prevent the non-uniform arrangement of the divided pieces in the circumferential direction, as in the first embodiment shown in FIG.
- FIG. 18 (A) is a plan view of the restraining ring
- FIG. 18 (B) is a sectional view.
- the constraining ring includes a donut plate-shaped annular portion 22 made of an elastic material, and a protruding body 53 formed by projecting the annular portion 22 toward the small diameter side of the edge.
- a hole 28 through which the holding pin 54 is inserted is formed in the annular portion 22.
- the hole 28 serves as an engagement portion that is held on the large-diameter end surface of the edge via a holding pin 54.
- the protrusion 53 is formed in a cylindrical shape, and fixes the cylindrical body to the annular portion 22.
- the projections 53 form projections 21 that fit into the gaps between the divided pieces.
- the protrusions need to be crushed and deformed when the gap between the # 1 pieces becomes small during edge fixing. There is.
- the protruding body 53 is formed in a cylindrical shape from a deformable metal material such as aluminum.
- three protrusions 21 were provided at intervals of 120 °, and holes 28 were formed between these protrusions 21.
- the retaining pin 54 After passing through the hole 28 of the annular portion 22, the retaining pin 54 is inserted into the positioning hole 16 provided on the large-diameter end face of the edge, and is restrained by fixing the retaining pin 54 to the edge. Hold ring 20 in proper position with respect to edge 10.
- Fig. 19 shows the state of attachment of this restraining ring to the ⁇ edge.
- This restraint ring is attached from the end face on the large diameter side of the edge.
- the hole 28 formed in the annular portion 22 is aligned with the positioning hole 16 on the edge of the ⁇ edge, and the retaining pin 54 is inserted into these holes 28 and the positioning hole 16 and fixed, so that the restraining ring is aligned with the ⁇ edge.
- the projection 53 serving as the projection ⁇ ⁇ is interposed between the divided pieces.
- This restraining ring can also prevent the non-uniform arrangement of the divided pieces in the circumferential direction, as in the first embodiment shown in FIG. Moreover, the contact area with the divided pieces can be increased by the cylindrical projecting body 53, and the arrangement of the divided pieces in the circumferential direction can be more reliably and evenly maintained.
- the edge of the present invention is suitable for a fixing edge in which the divided pieces of the edge can be arranged evenly in the circumferential direction of the PC steel material, and the divided pieces can be arranged uniformly in the longitudinal direction.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04705891A EP1630316A4 (en) | 2003-04-18 | 2004-01-28 | WEDGE FOR FIXING PC STEEL |
HK06111553.0A HK1090968A1 (en) | 2003-04-18 | 2006-10-19 | Wedge for fixing pc steel pc |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-115083 | 2003-04-18 | ||
JP2003115083A JP3565348B2 (ja) | 2002-05-08 | 2003-04-18 | Pc鋼材の定着用ウェッジ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004094745A1 true WO2004094745A1 (ja) | 2004-11-04 |
Family
ID=33307943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/000784 WO2004094745A1 (ja) | 2003-04-18 | 2004-01-28 | Pc鋼材の定着用ウェッジ |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1630316A4 (ja) |
KR (1) | KR101037258B1 (ja) |
CN (1) | CN100545397C (ja) |
HK (1) | HK1090968A1 (ja) |
WO (1) | WO2004094745A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9874016B2 (en) * | 2015-07-17 | 2018-01-23 | Felix Sorkin | Wedge for post tensioning tendon |
CN113513338A (zh) * | 2021-08-04 | 2021-10-19 | 华东交通大学 | 一种适用于盾构隧道集水井施工的环形支架及工作方法 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102188103B1 (ko) * | 2019-04-26 | 2020-12-07 | 휴인 주식회사 | 슬라이딩 체결형 기둥과 보의 구조물 |
KR102188106B1 (ko) * | 2019-04-26 | 2020-12-07 | 휴인 주식회사 | 기둥과 보의 구조물 |
KR102188085B1 (ko) * | 2019-04-26 | 2020-12-07 | 휴인 주식회사 | 이중 긴장재 도입형 기둥과 보의 구조물 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3843288A (en) * | 1969-04-16 | 1974-10-22 | Conenco Int Ltd | Tendon anchorage with threaded support element |
US3999418A (en) * | 1974-01-25 | 1976-12-28 | Juan Coll Morell | Method of making a tapered wedge |
US4362421A (en) * | 1980-03-17 | 1982-12-07 | Kelly William F | Anchor for use in the post-tensioning of prestressed concrete |
EP0108558A2 (en) * | 1982-11-02 | 1984-05-16 | Ccl Systems Limited | Wedge type anchorage device |
JPH055938U (ja) * | 1991-07-09 | 1993-01-29 | 住友電気工業株式会社 | プレテンシヨニンググリツプ用楔止め具 |
JPH06117054A (ja) * | 1992-10-09 | 1994-04-26 | Mitsubishi Kasei Corp | Frp製緊張材の緊張定着方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4059931A (en) * | 1976-01-29 | 1977-11-29 | Mongan William T | Building framing system for post-tensioned modular building structures |
JPH0531135Y2 (ja) | 1985-03-28 | 1993-08-10 | ||
FR2582767A1 (fr) * | 1985-05-30 | 1986-12-05 | Freyssinet Int Stup | Perfectionnements aux mors tronconiques d'ancrage |
JPS6214021U (ja) | 1985-07-12 | 1987-01-28 | ||
FR2586076B1 (fr) * | 1985-08-12 | 1987-12-04 | Freyssinet Int Stup | Perfectionnements aux mors tronconiques d'ancrage pour cables et a leurs procedes de fabrication |
JPH11210163A (ja) | 1998-01-28 | 1999-08-03 | Ps:Kk | Frp緊張材の定着具 |
-
2004
- 2004-01-28 WO PCT/JP2004/000784 patent/WO2004094745A1/ja active Application Filing
- 2004-01-28 CN CNB2004800103958A patent/CN100545397C/zh not_active Expired - Fee Related
- 2004-01-28 KR KR1020057019322A patent/KR101037258B1/ko active IP Right Grant
- 2004-01-28 EP EP04705891A patent/EP1630316A4/en not_active Withdrawn
-
2006
- 2006-10-19 HK HK06111553.0A patent/HK1090968A1/xx not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3843288A (en) * | 1969-04-16 | 1974-10-22 | Conenco Int Ltd | Tendon anchorage with threaded support element |
US3999418A (en) * | 1974-01-25 | 1976-12-28 | Juan Coll Morell | Method of making a tapered wedge |
US4362421A (en) * | 1980-03-17 | 1982-12-07 | Kelly William F | Anchor for use in the post-tensioning of prestressed concrete |
EP0108558A2 (en) * | 1982-11-02 | 1984-05-16 | Ccl Systems Limited | Wedge type anchorage device |
JPH055938U (ja) * | 1991-07-09 | 1993-01-29 | 住友電気工業株式会社 | プレテンシヨニンググリツプ用楔止め具 |
JPH06117054A (ja) * | 1992-10-09 | 1994-04-26 | Mitsubishi Kasei Corp | Frp製緊張材の緊張定着方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1630316A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9874016B2 (en) * | 2015-07-17 | 2018-01-23 | Felix Sorkin | Wedge for post tensioning tendon |
US9909315B2 (en) * | 2015-07-17 | 2018-03-06 | Felix Sorkin | Wedge for post tensioning tendon |
CN113513338A (zh) * | 2021-08-04 | 2021-10-19 | 华东交通大学 | 一种适用于盾构隧道集水井施工的环形支架及工作方法 |
Also Published As
Publication number | Publication date |
---|---|
CN1774550A (zh) | 2006-05-17 |
KR101037258B1 (ko) | 2011-05-26 |
EP1630316A4 (en) | 2009-09-23 |
EP1630316A1 (en) | 2006-03-01 |
CN100545397C (zh) | 2009-09-30 |
KR20060004664A (ko) | 2006-01-12 |
HK1090968A1 (en) | 2007-01-05 |
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