WO2010018615A1 - Sleeve for anchor bolt and its manufacturing method - Google Patents
Sleeve for anchor bolt and its manufacturing method Download PDFInfo
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- WO2010018615A1 WO2010018615A1 PCT/JP2008/064406 JP2008064406W WO2010018615A1 WO 2010018615 A1 WO2010018615 A1 WO 2010018615A1 JP 2008064406 W JP2008064406 W JP 2008064406W WO 2010018615 A1 WO2010018615 A1 WO 2010018615A1
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- hole
- diameter
- sleeve body
- diameter hole
- small
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- 238000004519 manufacturing process Methods 0.000 title description 8
- 238000005096 rolling process Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 25
- 238000000465 moulding Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 5
- 235000013372 meat Nutrition 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000004567 concrete Substances 0.000 abstract description 9
- 230000037431 insertion Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 description 4
- 239000011381 foam concrete Substances 0.000 description 3
- 102000010029 Homer Scaffolding Proteins Human genes 0.000 description 2
- 108010077223 Homer Scaffolding Proteins Proteins 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 1
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Classifications
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
Definitions
- the present invention relates to an anchor bolt sleeve fixed in a prepared hole formed in concrete or cellular concrete, and a method for manufacturing the anchor bolt sleeve.
- sleeve body having a slit extending in the axial direction at the tip, and a truncated cone-shaped wedge body incorporated in the sleeve body, and the slit is formed by driving the wedge body toward the tip of the sleeve body.
- An anchor bolt sleeve that fixes the sleeve body by expanding the diameter of the tip of the sleeve body in a pilot hole formed in concrete or lightweight cellular concrete (hereinafter, concrete or lightweight cellular concrete is simply referred to as concrete) are known.
- the sleeve body and the wedge body are separate parts, it is necessary to manufacture the sleeve body and the wedge body separately, which increases the cost. Also, the wedge body has a small diameter end first, and the sleeve body. Since it is necessary to insert the inside of the sleeve, it takes time for the combination, and the wedge body may come out of the sleeve body in the combined state, so that handling becomes difficult.
- An object of the present invention is to provide a sleeve for an anchor bolt capable of fixing the sleeve body with a relatively small driving force and a method for manufacturing the sleeve for the anchor bolt.
- a sleeve main body having a large-diameter hole extending in the axial direction from one end surface and a small-diameter hole extending in the axial direction from the other end surface; By hitting the pin inserted into the small-diameter hole in the axial direction, the circular intersection edge where the cylindrical inner surface of the large-diameter hole intersects the closed end surface and the circular intersection edge where the cylindrical inner surface of the small-diameter hole intersects the closed end surface are connected.
- the first material having a circular cross section is inserted into the molding hole formed in the mold and inserted into the molding hole through the opening.
- the extruded material is inserted into the forming hole with one end face first, and a second press-fitting punch having a circular cross section inserted into the inside from the opening of the forming hole is pressed against the center of the other end face of the material.
- a configuration comprising a step of cutting in the axial direction from the other end surface of the main body and forming a slit in the other end portion of the sleeve main body and the small diameter side end portion of the wedge body is adopted.
- the sleeve body When fixing the anchor bolt sleeve having the above-described structure, the sleeve body is inserted into the lower hole formed in the concrete with the other end having the small-diameter hole formed first, and the sleeve body is inserted into the lower hole. In the accommodated state, a rod is inserted into the large-diameter hole, and the wedge body is caused to enter the small-diameter hole by driving the rear end of the rod.
- the wedge body smoothly enters the small-diameter hole while reducing the diameter, and the large-diameter side end of the wedge body enters the small-diameter hole.
- the other end of the sleeve body is expanded in diameter, and the split piece formed between the slits is strongly pressed against the inner surface of the lower hole, and the sleeve main body is fixed by pressure contact with the inner surface of the lower hole of the split piece.
- the wedge body since the wedge body is formed by breaking and separating from the sleeve body, the outer diameter surface is a rough surface. For this reason, when the wedge body enters the small-diameter hole by driving, the wedge body becomes a shrink-fitted state and is integrated with the sleeve body due to the frictional heat of the contact portion with the sleeve body. As a result, the wedge body does not become slack, and a stable fixed state can be obtained in the sleeve body.
- the wedge body is formed by fracture separation, the separation surfaces are engaged with each other, and the inner diameter of the female screw formed by rolling on the inner diameter surface of the large-diameter hole is smaller than the large-diameter end surface of the wedge body. Therefore, the wedge body is securely held by the sleeve body and is not separated from the sleeve body. For this reason, the work of combining the sleeve main body and the wedge body can be eliminated, and the handling is easy.
- the small-diameter side end of the wedge body is formed with a slit that divides the small-diameter side end into a plurality in the circumferential direction.
- the wedge body smoothly enters the small-diameter hole of the sleeve body while the small-diameter side end portion is reduced in diameter, and the sleeve body can be fixed by a relatively small driving force.
- an anchor bolt sleeve since the sleeve body and the wedge body can be formed from a round shaft-shaped material, an inexpensive anchor bolt sleeve can be obtained.
- FIG. 1 The perspective view which shows embodiment of the sleeve for anchor bolts concerning this invention 1 is a longitudinal front view of FIG. (I) is a cross-sectional view showing a state in which the anchor bolt sleeve shown in FIG. 1 is inserted into a prepared hole formed in concrete, and (II) is a cross-sectional view showing a fixed state of the anchor bolt sleeve.
- Sectional view with the material set in the mold hole Sectional view showing the molded state of large-diameter hole Sectional view of the material with large diameter holes set in the mold hole Sectional view showing the molded state of the small diameter hole Sectional view of the state in which the flesh between the closed end faces of the large-diameter hole and small-diameter hole is broken and separated (I) is a longitudinal front view showing the formation of slits, (II) is a longitudinal side view of (I). Sectional drawing which shows the formation state of an internal thread
- the anchor bolt sleeve A includes a metal sleeve body 1 and a metal wedge body 11 held in the sleeve body 1.
- the sleeve body 1 has a large-diameter hole 2 extending in the axial direction from one end surface and a small-diameter hole 3 extending in the axial direction from the other end surface.
- Each of the large-diameter hole 2 and the small-diameter hole 3 is formed by a homer process to be a blind hole, and the meat portion remaining between the closed end surfaces of the large-diameter hole 2 and the small-diameter hole 3 is conical by striking from the small-diameter hole 3.
- the meat part that is broken and separated into a trapezoidal shape and is broken and separated is the wedge body 11.
- the outer diameter surface 12 of the wedge body 11 and the inner diameter surface of the hole portion between the large diameter hole 2 and the small diameter hole 3 of the sleeve body 1 are broken surfaces, and the sleeve body 1 is engaged by the engagement of minute irregularities on the broken surface.
- the wedge body 11 is held on the surface.
- a female screw 4 having an effective inner diameter surface is formed by rolling.
- the inner diameter of the female screw 4 is smaller than the outer diameter of the large end surface of the wedge body 11. It is said that.
- a plurality of slits 5 extending in the axial direction by cutting from the other end surface of the sleeve body 1 are formed in the other end portion of the sleeve body 1 and the small diameter side end portion of the wedge body 11 at intervals in the circumferential direction.
- the mold 21 used in the manufacturing method has a round hole-shaped molding hole 22, and an opening at one end of the molding hole 22 is a protruding sleeve 23 and a protruding pin 24 inserted into the protruding sleeve 23. It is blocked by
- FIG. 4 shows a state in which a round shaft-shaped material W is inserted into the molding hole 22 of the mold 21, and the material W is used as the anchor bolt sleeve A by the following first to fifth steps. .
- a first press-in punch 25 having a circular cross section is inserted from the opening of the molding hole 21 and the first press-in punch 25 is pressed against the center of one end surface of the material W.
- a large-diameter hole 2 made of a blind hole is formed on one end face of the material W by backward extrusion by pushing the first press-fitting punch 25 in the axial direction.
- FIG. 6 shows a state in which the material W in which the large-diameter hole 2 is formed is inserted into the molding hole 22.
- a second press-fit punch 26 having a circular cross section inserted into the inside from the opening of the forming hole 22 is pressed against the center of the other end surface of the material W, and the second press-fit punch 26 is As shown in FIG. 7, a small-diameter hole 3 made of a blind hole is formed in the other end surface of the material W by backward extrusion by pushing in the axial direction. At this time, it is preferable to prevent the large-diameter hole 2 from being deformed by projecting into the previously formed large-diameter hole 2 and inserting the pin 24.
- the second press-fitting punch 26 as a pin is inserted into the small-diameter hole 3 of the raw material W while the raw material W remains in the molding hole 22 of the mold 21, and the large-diameter hole 2 A circular crossing edge where the cylindrical inner surface of the large-diameter hole 2 and the closed end surface intersect with each other by inserting the protruding pin 24 into the shaft and repeatedly moving the protruding pin 24 and the second press-fitting punch 26 in the axial direction.
- the flesh portion between the large-diameter hole 2 and the closed end face of the small-diameter hole 3 is broken and separated along a virtual conical trapezoidal surface connecting the cylindrical inner surface of the small-diameter hole 3 and the circular intersection edge where the closed end face intersects.
- a sleeve main body 1 and a truncated cone-shaped wedge body 11 are formed by breaking and separating the flesh, and the wedge body 11 is formed by engagement of minute irregularities formed on the fracture surface. 1 is held.
- the flesh portion is broken and separated by a striking action in which the protruding pin 24 and the second press-fit punch 26 are alternately moved in the axial direction.
- the second press-fit punch 26 is set in the axial direction.
- the meat part may be broken and separated by repeatedly moving the second press-fitting punch 26.
- the circular blade 27 is rotated in the axial direction from the other end surface of the sleeve body 1, and the sleeve body 1 Slits 5 are formed at the other end and the small diameter side end of the wedge body 11.
- the slits 5 are cut, the other end surface of the sleeve body 1 is cut into a cross shape to form four slits 5.
- the number of slits 5 is arbitrary, and at least two or more slits 5 are formed.
- a female screw 4 having an effective diameter on the inner diameter surface of the large diameter hole 2 of the sleeve body 1 is formed by rolling.
- the anchor bolt sleeve A shown in FIGS. 1 and 2 is formed.
- the female screw 4 is formed after the slit 5 is formed.
- the slit 5 may be cut after the female screw 4 is formed.
- FIG. 3 (II) shows a fixed state of the sleeve body 1.
- the wedge body 11 enters the small diameter hole 3 of the sleeve body 1 while the small diameter side end portion is reduced in diameter. It will enter smoothly inside. For this reason, the sleeve body 1 can be fixed by a relatively small driving force.
- the wedge body 11 is formed by fracture separation from the sleeve body 1, the outer diameter surface is a rough surface. For this reason, when the wedge body 11 enters the small diameter hole 3 by driving, the wedge body 11 is in a shrink-fitted state and integrated with the sleeve body 1 by the frictional heat of the contact portion with the sleeve body 1. become. For this reason, no slack is caused by vibration or the like, and a stable fixed state can be obtained in the sleeve body 1.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dowels (AREA)
Abstract
A sleeve for an anchor bolt capable of fixing a sleeve body by relatively small driving force. A large diameter hole (2) extending axially from one end surface of the sleeve body (1) and a small diameter hole (3) axially extending from the other end surface are formed on the sleeve body (1). Driving a pin inserted into the small diameter hole (3) of the sleeve body (1) in the axial direction breaks and separates a truncated-cone-shaped wedge (11) from the sleeve body (1). A female screw (4) having an inner diameter plane of the large diameter hole (2) as the effective diameter is formed on the inner diameter plane by form-rolling. Slits (5) extending axially from the second end surface of the sleeve body (1) for circumferentially splitting a second end of the sleeve body (1) and an end on a side of the small diameter hole of the wedge (11) into a plurality of pieces are formed at the second end of the sleeve body (1) and the end on the side of the small diameter hole of the wedge (11). The sleeve body (1) is inserted into a preparatory hole (30) formed in concrete (B), a rod (31) inserted into the large diameter hole (2) is struck to insert the wedge (11) into the small diameter hole (3). At the insertion, the diameter of the wedge (11) is reduced to reduce the driving force.
Description
この発明は、コンクリートや気泡コンクリートに形成された下孔内に固定するアンカーボルト用スリーブと、そのアンカーボルト用スリーブの製造方法に関する。
The present invention relates to an anchor bolt sleeve fixed in a prepared hole formed in concrete or cellular concrete, and a method for manufacturing the anchor bolt sleeve.
軸方向に延びるスリットを先端部に有するスリーブ本体と、そのスリーブ本体内に組込まれた円すい台形の楔体からなり、上記楔体をスリーブ本体の先端に向けて打込むことにより、スリットが形成されたスリーブ本体の先端部をコンクリートや軽量気泡コンクリート（以下、コンクリートや軽量気泡コンクリートを単にコンクリートという）に形成された下孔内で拡径させて、スリーブ本体を固定するアンカーボルト用スリーブは従来から知られている。
It consists of a sleeve body having a slit extending in the axial direction at the tip, and a truncated cone-shaped wedge body incorporated in the sleeve body, and the slit is formed by driving the wedge body toward the tip of the sleeve body. An anchor bolt sleeve that fixes the sleeve body by expanding the diameter of the tip of the sleeve body in a pilot hole formed in concrete or lightweight cellular concrete (hereinafter, concrete or lightweight cellular concrete is simply referred to as concrete) Are known.
ここで、スリーブ本体と楔体とが別部品であると、スリーブ本体と楔体とを別々に製作する必要があるため、コストが高くなり、また、楔体は小径端を先にしてスリーブ本体内に挿入する必要があるため、組み合わせに手間がかかり、しかも、組み合わせ状態で楔体がスリーブ本体から抜け出す可能性があるため、取り扱いが困難となる。
Here, if the sleeve body and the wedge body are separate parts, it is necessary to manufacture the sleeve body and the wedge body separately, which increases the cost. Also, the wedge body has a small diameter end first, and the sleeve body. Since it is necessary to insert the inside of the sleeve, it takes time for the combination, and the wedge body may come out of the sleeve body in the combined state, so that handling becomes difficult.
そのような不都合を解消するため、本件の出願人においては、特許文献１において、ホーマー加工により大径孔と小径孔とを形成したスリーブ本体から楔体を破断分離させたアンカーボルト用スリーブを既に提案している。
In order to eliminate such an inconvenience, the applicant of the present application has already disclosed an anchor bolt sleeve in which a wedge body is broken and separated from a sleeve body in which a large-diameter hole and a small-diameter hole are formed by Homer processing in Patent Document 1. is suggesting.
上記のアンカーボルト用スリーブにおいては、スリーブ本体からの破断分離によって楔体を形成しているため、破断分離面は粗く、その粗面の引っ掛かりによって楔体はスリーブ本体に強固に保持されることになる。このため、スリーブ本体に楔体を組み合わせる作業を不要とすることができ、また、楔体が抜け出すおそれがないため、取り扱いが容易であるという特徴を有する。
In the above anchor bolt sleeve, since the wedge body is formed by breaking and separating from the sleeve body, the fracture separating surface is rough, and the wedge body is firmly held by the sleeve body by the catch of the rough surface. Become. For this reason, the operation | work which combines a wedge body with a sleeve main body can be made unnecessary, and since there is no possibility that a wedge body may come out, it has the characteristics that handling is easy.
ところで、上記従来のアンカーボルト用スリーブにおいては、スリーブ本体と楔体の破断分離面が粗面であって、摩擦抵抗が極めて大きいため、楔体の打込みによってスリーブ本体の先端部を拡径させるスリーブ本体の固定に際し、比較的大きな打込み力を必要とし、その打込み力の低減化を図る上において改善すべき点が残されている。
By the way, in the conventional anchor bolt sleeve, since the fracture separation surface of the sleeve body and the wedge body is rough and the frictional resistance is extremely large, the sleeve that expands the tip of the sleeve body by driving the wedge body When fixing the main body, a relatively large driving force is required, and there are still points to be improved in order to reduce the driving force.
この発明の課題は、比較的小さい打込み力によってスリーブ本体を固定することができるようにしたアンカーボルト用スリーブと、そのアンカーボルト用スリーブの製造方法を提供することである。
An object of the present invention is to provide a sleeve for an anchor bolt capable of fixing the sleeve body with a relatively small driving force and a method for manufacturing the sleeve for the anchor bolt.
上記の課題を解決するため、この発明に係るアンカーボルト用スリーブにおいては、一端面から軸方向に延びる大径孔および他端面から軸方向に延びる小径孔を有するスリーブ本体と、そのスリーブ本体の前記小径孔に挿入されたピンの軸方向への打撃により、大径孔の円筒形内面と閉塞端面とが交わる円形交差縁と小径孔の円筒形内面と閉塞端面とが交わる円形交差縁とを結ぶ仮想円すい台形面に沿ってスリーブ本体から破断分離された円すい台形の楔体とからなり、前記大径孔の内径面に、その内径面を有効径とする雌ねじを転造により成形し、前記スリーブ本体の他端部および楔体の小径側端部に、スリーブ本体の他端面から軸方向に延びてスリーブ本体の他端部および楔体の小径側端部を周方向に複数に分断するスリットを形成した構成を採用したのである。
In order to solve the above problems, in the anchor bolt sleeve according to the present invention, a sleeve main body having a large-diameter hole extending in the axial direction from one end surface and a small-diameter hole extending in the axial direction from the other end surface; By hitting the pin inserted into the small-diameter hole in the axial direction, the circular intersection edge where the cylindrical inner surface of the large-diameter hole intersects the closed end surface and the circular intersection edge where the cylindrical inner surface of the small-diameter hole intersects the closed end surface are connected. A conical wedge-shaped wedge body separated from the sleeve body along a virtual conical trapezoidal surface, and by forming a female screw having an inner diameter surface on the inner diameter surface of the large-diameter hole by rolling, the sleeve A slit extending in the axial direction from the other end surface of the sleeve body and dividing the other end portion of the sleeve body and the small diameter side end portion of the wedge body into a plurality in the circumferential direction is formed in the other end portion of the main body and the small diameter side end portion of the wedge body. Forming Than is adopted the configuration.
また、この発明に係るアンカーボルト用スリーブの製造方法においては、金型に形成された成形孔内に素材状の素材を挿入し、上記成形孔の開口から内部に挿入される断面円形の第１圧入ポンチを素材の一端面中央に押し当て、その第１圧入ポンチの軸方向への押し込みによる後方押出しにより素材の一端面に盲孔からなる大径孔を形成する第１工程と、成形孔から押し出された素材を一端面を先にして上記成形孔に挿入し、その成形孔の開口から内部に挿入される断面円形の第２圧入ポンチを素材の他端面の中央に押し当て、その第２圧入ポンチの軸方向への押し込みによる後方押出しにより素材の他端面に盲孔からなる小径孔を形成する第２工程と、上記小径孔に第２圧入ポンチを挿入し、かつ、大径孔に第１ポンチを挿入し、その第１ポンチと第２圧入ポンチのうち、少なくとも第２圧入ポンチを軸方向に繰り返し移動させる打撃作用により、大径孔と小径孔の閉塞端面間の肉部を破断分離させてスリーブ本体と円すい台形の楔体とを形成する工程と、楔体の形成後において、スリーブ本体の大径孔の内径面に、その内径面を有効径とする雌ねじを転造により形成する工程と、円形刃物の回転によりスリーブ本体の他端面から軸方向に切り込んで、そのスリーブ本体の他端部と楔体の小径側端部とにスリットを形成する工程とからなる構成を採用したのである。
In the anchor bolt sleeve manufacturing method according to the present invention, the first material having a circular cross section is inserted into the molding hole formed in the mold and inserted into the molding hole through the opening. A first step of pressing a press-fitting punch against the center of one end surface of the material, and forming a large-diameter hole consisting of a blind hole on one end surface of the material by pushing backward in the axial direction of the first press-fitting punch; The extruded material is inserted into the forming hole with one end face first, and a second press-fitting punch having a circular cross section inserted into the inside from the opening of the forming hole is pressed against the center of the other end face of the material. A second step of forming a small-diameter hole consisting of a blind hole in the other end surface of the material by backward extrusion by pushing the press-in punch in the axial direction; a second press-in punch is inserted into the small-diameter hole; Insert one punch, the second Of the punch and the second press-in punch, at least the second press-in punch is repeatedly moved in the axial direction so that the flesh portion between the closed end face of the large-diameter hole and the small-diameter hole is broken and separated, and the sleeve body and the truncated cone-shaped wedge. A step of forming a body, a step of forming a female screw having an effective diameter on the inner diameter surface of the large-diameter hole of the sleeve body by rolling, and a sleeve by rotation of a circular cutter after the formation of the wedge body A configuration comprising a step of cutting in the axial direction from the other end surface of the main body and forming a slit in the other end portion of the sleeve main body and the small diameter side end portion of the wedge body is adopted.
上記の構成からなるアンカーボルト用スリーブの固定に際しては、コンクリートに形成された下孔内にスリーブ本体を、小径孔が形成された他端を先にして挿入し、そのスリーブ本体が下孔内に納まる状態において、大径孔に棒材を挿入して、その棒材の後端の打込みにより楔体を小径孔内に侵入させるようにする。
When fixing the anchor bolt sleeve having the above-described structure, the sleeve body is inserted into the lower hole formed in the concrete with the other end having the small-diameter hole formed first, and the sleeve body is inserted into the lower hole. In the accommodated state, a rod is inserted into the large-diameter hole, and the wedge body is caused to enter the small-diameter hole by driving the rear end of the rod.
このとき、楔体の小径側端部にはスリットが形成されているため、楔体は縮径しつつ小径孔内にスムーズに侵入し、その楔体の大径側端部が小径孔に侵入することにより、スリーブ本体の他端部が拡径されて、スリット間に形成された分割片が下孔の内面に強く押し付けられ、上記分割片の下孔内径面に対する圧接によってスリーブ本体が固定される。
At this time, since the slit is formed in the small-diameter end of the wedge body, the wedge body smoothly enters the small-diameter hole while reducing the diameter, and the large-diameter side end of the wedge body enters the small-diameter hole. As a result, the other end of the sleeve body is expanded in diameter, and the split piece formed between the slits is strongly pressed against the inner surface of the lower hole, and the sleeve main body is fixed by pressure contact with the inner surface of the lower hole of the split piece. The
ここで、楔体はスリーブ本体からの破断分離によって形成されたものであるため、外径面は粗面とされている。このため、楔体が打込みによって小径孔内に侵入する際、スリーブ本体との接触部の摩擦熱により、楔体は焼ばめ状態となってスリーブ本体に一体化されることになり、振動等により楔体に弛みが生じるようなことはなく、スリーブ本体に安定した固定状態を得ることができる。
Here, since the wedge body is formed by breaking and separating from the sleeve body, the outer diameter surface is a rough surface. For this reason, when the wedge body enters the small-diameter hole by driving, the wedge body becomes a shrink-fitted state and is integrated with the sleeve body due to the frictional heat of the contact portion with the sleeve body. As a result, the wedge body does not become slack, and a stable fixed state can be obtained in the sleeve body.
また、楔体は破断分離により形成されて、その分離面は互いに係合状態にあり、しかも、大径孔の内径面に転造によって形成された雌ねじの内径は楔体の大径端面より小径であるため、楔体はスリーブ本体に確実に保持されてスリーブ本体から分離するようなことはない。このため、スリーブ本体と楔体の組み合わせ作業を不要とすることができ、取り扱いが容易である。
In addition, the wedge body is formed by fracture separation, the separation surfaces are engaged with each other, and the inner diameter of the female screw formed by rolling on the inner diameter surface of the large-diameter hole is smaller than the large-diameter end surface of the wedge body. Therefore, the wedge body is securely held by the sleeve body and is not separated from the sleeve body. For this reason, the work of combining the sleeve main body and the wedge body can be eliminated, and the handling is easy.
上記のように、この発明に係るアンカーボルト用スリーブにおいては、楔体の小径側端部に、その小径側端部を周方向に複数に分断するスリットを形成したので、楔体の打込み時、その楔体は小径側端部が縮径しつつスリーブ本体の小径孔内にスムーズに侵入することになり、比較的小さな打込み力によってスリーブ本体の固定化を図ることができる。
As described above, in the anchor bolt sleeve according to the present invention, the small-diameter side end of the wedge body is formed with a slit that divides the small-diameter side end into a plurality in the circumferential direction. The wedge body smoothly enters the small-diameter hole of the sleeve body while the small-diameter side end portion is reduced in diameter, and the sleeve body can be fixed by a relatively small driving force.
また、この発明に係るアンカーボルト用スリーブの製造方法においては、丸軸状の素材からスリーブ本体と楔体とを形成することができるため、コストの安いアンカーボルト用スリーブを得ることができる。
Further, in the method for manufacturing an anchor bolt sleeve according to the present invention, since the sleeve body and the wedge body can be formed from a round shaft-shaped material, an inexpensive anchor bolt sleeve can be obtained.
１ スリーブ本体
２ 大径孔
３ 小径孔
４ 雌ねじ
５ スリット
１１ 楔体
２１ 金型
２２ 成形孔
２５ 第１圧入ポンチ
２６ 第２圧入ポンチ
２７ 円形刃物
W 素材 DESCRIPTION OFSYMBOLS 1 Sleeve main body 2 Large diameter hole 3 Small diameter hole 4 Female screw 5 Slit 11 Wedge body 21 Mold 22 Molding hole 25 1st press-fit punch 26 2nd press-fit punch 27 Circular cutter
W material
２ 大径孔
３ 小径孔
４ 雌ねじ
５ スリット
１１ 楔体
２１ 金型
２２ 成形孔
２５ 第１圧入ポンチ
２６ 第２圧入ポンチ
２７ 円形刃物
W 素材 DESCRIPTION OF
W material
以下、この発明の実施の形態を図面に基づいて説明する。図１および図２に示すように、この発明に係るアンカーボルト用スリーブＡは、金属製のスリーブ本体１と、そのスリーブ本体１内に保持された金属製の楔体１１とからなっている。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the anchor bolt sleeve A according to the present invention includes a metal sleeve body 1 and a metal wedge body 11 held in the sleeve body 1.
スリーブ本体１は、一端面から軸方向に延びる大径孔２と、他端面から軸方向に延びる小径孔３とを有している。大径孔２と小径孔３のそれぞれはホーマー加工により形成されて盲孔とされ、その大径孔２と小径孔３の閉塞端面間に残された肉部は小径孔３からの打撃により円すい台形状に破断分離され、その破断分離された肉部が上記楔体１１とされている。
The sleeve body 1 has a large-diameter hole 2 extending in the axial direction from one end surface and a small-diameter hole 3 extending in the axial direction from the other end surface. Each of the large-diameter hole 2 and the small-diameter hole 3 is formed by a homer process to be a blind hole, and the meat portion remaining between the closed end surfaces of the large-diameter hole 2 and the small-diameter hole 3 is conical by striking from the small-diameter hole 3. The meat part that is broken and separated into a trapezoidal shape and is broken and separated is the wedge body 11.
このため、楔体１１の外径面１２およびスリーブ本体１の大径孔２と小径孔３間の孔部内径面は破断面とされ、その破断面の微小な凹凸の係合によってスリーブ本体１に楔体１１が保持されている。
For this reason, the outer diameter surface 12 of the wedge body 11 and the inner diameter surface of the hole portion between the large diameter hole 2 and the small diameter hole 3 of the sleeve body 1 are broken surfaces, and the sleeve body 1 is engaged by the engagement of minute irregularities on the broken surface. The wedge body 11 is held on the surface.
スリーブ本体１の大径孔２の内径面には、その内径面を有効径とする雌ねじ４が転造により形成されており、その雌ねじ４の内径は楔体１１の大端面の外径より小径とされている。
On the inner diameter surface of the large-diameter hole 2 of the sleeve body 1, a female screw 4 having an effective inner diameter surface is formed by rolling. The inner diameter of the female screw 4 is smaller than the outer diameter of the large end surface of the wedge body 11. It is said that.
また、スリーブ本体１の他端部および楔体１１の小径側端部には、スリーブ本体１の他端面からの切削によって軸方向に延びる複数のスリット５が周方向に間隔をおいて形成されている。
Further, a plurality of slits 5 extending in the axial direction by cutting from the other end surface of the sleeve body 1 are formed in the other end portion of the sleeve body 1 and the small diameter side end portion of the wedge body 11 at intervals in the circumferential direction. Yes.
図４乃至図１０は、上記の構成からなるアンカーボルト用スリーブＡの製造方法を示している。その製造方法に用いられる金型２１は、丸孔状の成形孔２２を有し、その成形孔２２の一端の開口は、突出しスリーブ２３と、その突出しスリーブ２３内に挿入された突出しピン２４とによって閉塞されている。
4 to 10 show a method for manufacturing the anchor bolt sleeve A having the above-described configuration. The mold 21 used in the manufacturing method has a round hole-shaped molding hole 22, and an opening at one end of the molding hole 22 is a protruding sleeve 23 and a protruding pin 24 inserted into the protruding sleeve 23. It is blocked by
図４は、上記金型２１の成形孔２２内に丸軸状の素材Ｗを挿入した状態を示し、その素材Ｗは、以下の第１工程乃至第５工程によってアンカーボルト用スリーブＡとされる。
FIG. 4 shows a state in which a round shaft-shaped material W is inserted into the molding hole 22 of the mold 21, and the material W is used as the anchor bolt sleeve A by the following first to fifth steps. .
第１工程では、図４に示すように、成形孔２１の開口から内部に断面円形の第１圧入ポンチ２５を挿入し、その第１圧入ポンチ２５を素材Ｗの一端面中央に押し当て、その第１圧入ポンチ２５の軸方向への押し込みによる後方押出しにより、図５に示すように、素材Ｗの一端面に盲孔からなる大径孔２を形成している。
In the first step, as shown in FIG. 4, a first press-in punch 25 having a circular cross section is inserted from the opening of the molding hole 21 and the first press-in punch 25 is pressed against the center of one end surface of the material W. As shown in FIG. 5, a large-diameter hole 2 made of a blind hole is formed on one end face of the material W by backward extrusion by pushing the first press-fitting punch 25 in the axial direction.
大径孔２の形成後、素材Ｗは突出しピン２４の突出しによって成形孔２２から取り出される。取り出された素材Ｗは、一端面を先にして成形孔２２内に挿入される。図６は、大径孔２が形成された素材Ｗを成形孔２２内に挿入した状態を示す。
After forming the large-diameter hole 2, the material W is taken out from the forming hole 22 by the protruding pin 24. The removed material W is inserted into the molding hole 22 with one end face first. FIG. 6 shows a state in which the material W in which the large-diameter hole 2 is formed is inserted into the molding hole 22.
第２工程では、図６に示すように、成形孔２２の開口から内部に挿入される断面円形の第２圧入ポンチ２６を素材Ｗの他端面の中央に押し当て、その第２圧入ポンチ２６の軸方向への押し込みによる後方押出しにより、図７に示すように、素材Ｗの他端面に盲孔からなる小径孔３を形成している。このとき、先に形成した大径孔２内に突出しピン２４を挿入して、大径孔２が変形するのを防止するようにしておくのが好ましい。
In the second step, as shown in FIG. 6, a second press-fit punch 26 having a circular cross section inserted into the inside from the opening of the forming hole 22 is pressed against the center of the other end surface of the material W, and the second press-fit punch 26 is As shown in FIG. 7, a small-diameter hole 3 made of a blind hole is formed in the other end surface of the material W by backward extrusion by pushing in the axial direction. At this time, it is preferable to prevent the large-diameter hole 2 from being deformed by projecting into the previously formed large-diameter hole 2 and inserting the pin 24.
第３工程では、金型２１の成形孔２２内に素材Ｗを残した状態において、その素材Ｗの小径孔３内にピンとしての第２圧入ポンチ２６を挿入し、かつ、大径孔２内に突出しピン２４を挿入し、その突出しピン２４と第２圧入ポンチ２６を軸方向に交互に繰り返し移動させることによる打撃により、大径孔２の円筒形内面と閉塞端面とが交わる円形交差縁と小径孔３の円筒形内面と閉塞端面とが交わる円形交差縁とを結ぶ仮想円すい台形面に沿って大径孔２と小径孔３の閉塞端面間の肉部を破断分離させるようにしている。その肉部の破断分離によって、図８に示すように、スリーブ本体１と円すい台形の楔体１１とが形成され、楔体１１は、破断面に形成される微小な凹凸の係合によってスリーブ本体１内に保持されている。
In the third step, the second press-fitting punch 26 as a pin is inserted into the small-diameter hole 3 of the raw material W while the raw material W remains in the molding hole 22 of the mold 21, and the large-diameter hole 2 A circular crossing edge where the cylindrical inner surface of the large-diameter hole 2 and the closed end surface intersect with each other by inserting the protruding pin 24 into the shaft and repeatedly moving the protruding pin 24 and the second press-fitting punch 26 in the axial direction. The flesh portion between the large-diameter hole 2 and the closed end face of the small-diameter hole 3 is broken and separated along a virtual conical trapezoidal surface connecting the cylindrical inner surface of the small-diameter hole 3 and the circular intersection edge where the closed end face intersects. As shown in FIG. 8, a sleeve main body 1 and a truncated cone-shaped wedge body 11 are formed by breaking and separating the flesh, and the wedge body 11 is formed by engagement of minute irregularities formed on the fracture surface. 1 is held.
なお、実施の形態では、突出しピン２４と第２圧入ポンチ２６を軸方向に交互に繰り返し移動させる打撃作用によって肉部の破断分離を行なうようにしたが、第２圧入ポンチ２６のみを軸方向に繰り返し移動させ、その第２圧入ポンチ２６の打撃によって肉部を破断分離させるようにしてもよい。
In the embodiment, the flesh portion is broken and separated by a striking action in which the protruding pin 24 and the second press-fit punch 26 are alternately moved in the axial direction. However, only the second press-fit punch 26 is set in the axial direction. The meat part may be broken and separated by repeatedly moving the second press-fitting punch 26.
楔体１１の形成後、第４工程では、図９（I）、（II）に示すように、円形刃物２７の回転によりスリーブ本体１の他端面から軸方向に切り込んで、そのスリーブ本体１の他端部と楔体１１の小径側端部とにスリット５を形成している。そのスリット５の切削に際し、ここでは、スリーブ本体１の他端面を十字状に切り込んで４本のスリット５を形成しているが、スリット５の数は任意であり、少なくとも２本以上形成する。
After the formation of the wedge body 11, in the fourth step, as shown in FIGS. 9 (I) and (II), the circular blade 27 is rotated in the axial direction from the other end surface of the sleeve body 1, and the sleeve body 1 Slits 5 are formed at the other end and the small diameter side end of the wedge body 11. Here, when the slits 5 are cut, the other end surface of the sleeve body 1 is cut into a cross shape to form four slits 5. However, the number of slits 5 is arbitrary, and at least two or more slits 5 are formed.
また、第５工程では、図１０に示すように、スリーブ本体１の大径孔２の内径面に、その内径面を有効径とする雌ねじ４を転造により形成している。その雌ねじ４の形成によって、図１および図２に示すアンカーボルト用スリーブＡが形成される。
Further, in the fifth step, as shown in FIG. 10, a female screw 4 having an effective diameter on the inner diameter surface of the large diameter hole 2 of the sleeve body 1 is formed by rolling. By forming the female screw 4, the anchor bolt sleeve A shown in FIGS. 1 and 2 is formed.
なお、実施の形態では、スリット５の形成後に雌ねじ４を形成するようにしているが、雌ねじ４の形成後にスリット５を切削してもよい。
In the embodiment, the female screw 4 is formed after the slit 5 is formed. However, the slit 5 may be cut after the female screw 4 is formed.
図１および図２に示すアンカーボルト用スリーブＡのコンクリートへの固定に際しては、図３（I）に示すように、コンクリートＢに下孔３０を形成し、その下孔３０内にスリーブ本体１を、小径孔３が形成された他端を先にして挿入し、そのスリーブ本体１が下孔３０内に納まる状態において、大径孔２内に棒材３１を挿入して、その棒材３１の後端の打込みにより楔体１１を小径孔３内に侵入させるようにする。
When the anchor bolt sleeve A shown in FIGS. 1 and 2 is fixed to the concrete, as shown in FIG. 3 (I), a pilot hole 30 is formed in the concrete B, and the sleeve body 1 is placed in the pilot hole 30. In the state where the other end where the small diameter hole 3 is formed is inserted first and the sleeve body 1 is accommodated in the lower hole 30, the bar 31 is inserted into the large diameter hole 2. The wedge body 11 is caused to enter the small diameter hole 3 by driving the rear end.
このとき、楔体１１の小径側端部にはスリット５が形成されているため、楔体１１は縮径しつつ小径孔３内にスムーズに侵入し、その楔体１１の大径側端部が小径孔３に侵入することにより、スリーブ本体１の他端部が拡径されて、スリット５間に形成された分割片６が下孔３０の内面に強く押し付けられ、上記分割片６の下孔３０内径面に対する圧接によってスリーブ本体１が固定される。図３（II）は、そのスリーブ本体１の固定状態を示している。
At this time, since the slit 5 is formed at the small-diameter end of the wedge body 11, the wedge body 11 smoothly enters the small-diameter hole 3 while reducing the diameter, and the large-diameter end of the wedge body 11 is inserted. Penetrates into the small-diameter hole 3, the other end of the sleeve body 1 is expanded in diameter, and the divided piece 6 formed between the slits 5 is strongly pressed against the inner surface of the lower hole 30, so that The sleeve body 1 is fixed by pressure contact with the inner surface of the hole 30. FIG. 3 (II) shows a fixed state of the sleeve body 1.
このように、楔体１１の打込みによるスリーブ本体１の固定時、楔体１１は小径側端部が縮径しつつスリーブ本体１の小径孔３内に侵入するため、楔体１１は小径孔３内にスムーズに侵入することになる。このため、比較的小さな打込み力によってスリーブ本体１の固定化を図ることができる。
Thus, when the sleeve body 1 is fixed by driving the wedge body 11, the wedge body 11 enters the small diameter hole 3 of the sleeve body 1 while the small diameter side end portion is reduced in diameter. It will enter smoothly inside. For this reason, the sleeve body 1 can be fixed by a relatively small driving force.
また、楔体１１はスリーブ本体１からの破断分離によって形成されたものであるため、外径面は粗面とされている。このため、楔体１１が打込みによって小径孔３内に侵入する際、スリーブ本体１との接触部の摩擦熱により、楔体１１は焼ばめ状態となってスリーブ本体１に一体化されることになる。このため、振動等により弛みが生じるようなことはなく、スリーブ本体１に安定した固定状態を得ることができる。
Further, since the wedge body 11 is formed by fracture separation from the sleeve body 1, the outer diameter surface is a rough surface. For this reason, when the wedge body 11 enters the small diameter hole 3 by driving, the wedge body 11 is in a shrink-fitted state and integrated with the sleeve body 1 by the frictional heat of the contact portion with the sleeve body 1. become. For this reason, no slack is caused by vibration or the like, and a stable fixed state can be obtained in the sleeve body 1.
Claims (2)
- 一端面から軸方向に延びる大径孔および他端面から軸方向に延びる小径孔を有するスリーブ本体と、そのスリーブ本体の前記小径孔に挿入されたピンの軸方向への打撃により、大径孔の円筒形内面と閉塞端面とが交わる円形交差縁と小径孔の円筒形内面と閉塞端面とが交わる円形交差縁とを結ぶ仮想円すい台形面に沿ってスリーブ本体から破断分離された円すい台形の楔体とからなり、前記大径孔の内径面に、その内径面を有効径とする雌ねじを転造により成形し、前記スリーブ本体の他端部および楔体の小径側端部に、スリーブ本体の他端面から軸方向に延びてスリーブ本体の他端部および楔体の小径側端部を周方向に複数に分断するスリットを形成したアンカーボルト用スリーブ。 A sleeve body having a large-diameter hole extending in the axial direction from one end surface and a small-diameter hole extending in the axial direction from the other end surface, and a pin inserted into the small-diameter hole of the sleeve body in the axial direction, A truncated cone-shaped wedge body that is fractured and separated from the sleeve body along a virtual truncated cone-shaped surface connecting a circular intersecting edge where the cylindrical inner surface and the closed end surface intersect with a circular intersecting edge where the cylindrical inner surface of the small-diameter hole and the closed end surface intersect A female screw having an effective diameter on the inner diameter surface of the large-diameter hole is formed by rolling, and the other end of the sleeve body and the small-diameter side end of the wedge body, A sleeve for an anchor bolt in which a slit extending in the axial direction from the end surface and forming a plurality of slits for dividing the other end portion of the sleeve body and the small diameter end portion of the wedge body in the circumferential direction is formed.
- 金型に形成された成形孔内に丸軸状の素材を挿入し、上記成形孔の開口から内部に挿入される断面円形の第１圧入ポンチを素材の一端面中央に押し当て、その第１圧入ポンチの軸方向への押し込みによる後方押出しにより素材の一端面に盲孔からなる大径孔を形成する第１工程と、
成形孔から押し出された素材を一端面を先にして上記成形孔に挿入し、その成形孔の開口から内部に挿入される断面円形の第２圧入ポンチを素材の他端面の中央に押し当て、その第２圧入ポンチの軸方向への押し込みによる後方押出しにより素材の他端面に盲孔からなる小径孔を形成する第２工程と、
上記小径孔に第２圧入ポンチを挿入し、かつ、大径孔に第１ポンチを挿入し、その第１ポンチと第２圧入ポンチのうち、少なくとも第２圧入ポンチを軸方向に繰り返し移動させる打撃作用により、大径孔と小径孔の閉塞端面間の肉部を破断分離させてスリーブ本体と円すい台形の楔体とを形成する工程と、
楔体の形成後において、スリーブ本体の大径孔の内径面に、その内径面を有効径とする雌ねじを転造により形成する工程と、
円形刃物の回転によりスリーブ本体の他端面から軸方向に切り込んで、そのスリーブ本体の他端部と楔体の小径側端部とにスリットを形成する工程と、
からなるアンカーボルト用スリーブの形成方法。 A round shaft-shaped material is inserted into a molding hole formed in the mold, and a first press-fitting punch having a circular cross section inserted into the inside from the opening of the molding hole is pressed against the center of one end surface of the material. A first step of forming a large-diameter hole consisting of a blind hole on one end surface of the material by backward extrusion by pushing the press-fitting punch in the axial direction;
The material extruded from the molding hole is inserted into the molding hole with one end face first, and a second press-fitting punch having a circular cross section inserted into the inside from the opening of the molding hole is pressed against the center of the other end surface of the material, A second step of forming a small-diameter hole consisting of a blind hole on the other end surface of the material by backward extrusion by pushing the second press-fitting punch in the axial direction;
Stroke in which the second press-fitting punch is inserted into the small-diameter hole, and the first punch is inserted into the large-diameter hole, and at least the second press-in punch is repeatedly moved in the axial direction of the first punch and the second press-in punch. A step of breaking and separating the meat portion between the closed end faces of the large-diameter hole and the small-diameter hole by the action to form a sleeve body and a truncated cone-shaped wedge body;
After the formation of the wedge body, on the inner diameter surface of the large-diameter hole of the sleeve body, a step of forming a female screw having the inner diameter surface as an effective diameter by rolling;
Cutting in the axial direction from the other end surface of the sleeve body by rotation of the circular cutter, and forming a slit in the other end portion of the sleeve body and the small diameter side end portion of the wedge body;
A method for forming an anchor bolt sleeve comprising:
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| PCT/JP2008/064406 WO2010018615A1 (en) | 2008-08-11 | 2008-08-11 | Sleeve for anchor bolt and its manufacturing method |
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- 2008-08-11 WO PCT/JP2008/064406 patent/WO2010018615A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0112894B2 (en) * | 1982-12-02 | 1989-03-02 | Akira Myake | |
| JPH08284263A (en) * | 1995-04-11 | 1996-10-29 | Yoshino Seiki:Kk | Anchor member |
| JP2006220161A (en) * | 2005-02-08 | 2006-08-24 | Goto Anchor:Kk | Unfolding anchor and method of manufacturing unfolding pin to be used for the same |
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