JP3229150B2 - Rubber hose sheath type for duct formation and duct formation method - Google Patents
Rubber hose sheath type for duct formation and duct formation methodInfo
- Publication number
- JP3229150B2 JP3229150B2 JP04421095A JP4421095A JP3229150B2 JP 3229150 B2 JP3229150 B2 JP 3229150B2 JP 04421095 A JP04421095 A JP 04421095A JP 4421095 A JP4421095 A JP 4421095A JP 3229150 B2 JP3229150 B2 JP 3229150B2
- Authority
- JP
- Japan
- Prior art keywords
- hose
- duct
- precast concrete
- rubber
- sheath type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Bridges Or Land Bridges (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、隣接するプレキャスト
コンクリートブロックの相対向する開口をもつ通孔間に
挿通され、プレキャストコンクリートブロックの間隙に
充填される硬化性部材の隣接する通孔間を連通するダク
トを形成する型となるダクト形成用ゴムホース製シース
型に関する。このシース型は、プレキャストコンクリー
トブロックで作られる橋、路盤等に使用される。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast concrete block which is inserted between through-holes having opposing openings and communicates between adjacent through-holes of a hardening member which is filled in a gap of the precast concrete block. TECHNICAL FIELD The present invention relates to a duct-forming rubber hose sheath mold that forms a duct to be formed. This sheath type is used for bridges, roadbeds and the like made of precast concrete blocks.
【０００２】[0002]
【従来の技術】ダクト形成用ゴムホース製シース型とし
て、従来より特開平１−１０２１９７号公報に記載され
たものが知られている。このシース型は、不通気性可撓
性材料製の膨張性チューブとこの膨張性チューブの両端
を固定するチューブ長さ保持用管体とから構成されてい
る。2. Description of the Related Art As a sheath type made of a rubber hose for forming a duct, a sheath type disclosed in JP-A-1-102197 has been conventionally known. This sheath type is composed of an inflatable tube made of an impermeable flexible material and a tube length holding tube for fixing both ends of the inflatable tube.
【０００３】[0003]
【発明が解決しようとする課題】前記従来のシース型は
ゴムまたは軟質合成樹脂で形成した膨張性チューブを使
用している。膨張性を得るため補強糸を使用するのが困
難で、膨張性チューブの機械的強度とか耐久性に問題が
ある。また、前記従来のシース型では、それ自身に剛性
がないため、ダクトを形成する際、膨張性チューブをダ
クト形成部にセットする時、予めワイヤ等をダクト形成
部に挿通した後、ワイヤを膨張性チューブに固定し、反
対側からワイヤを引っ張り膨張性チューブをダクト形成
部に導入してセットする必要があった。The conventional sheath type uses an inflatable tube formed of rubber or a soft synthetic resin. It is difficult to use a reinforcing yarn to obtain the expandability, and there is a problem in mechanical strength and durability of the expandable tube. Further, in the conventional sheath type, since there is no rigidity itself, when setting the inflatable tube in the duct forming portion when forming the duct, the wire or the like is inserted through the duct forming portion in advance, and then the wire is expanded. It was necessary to fix the tube to the flexible tube and pull the wire from the opposite side to introduce the expandable tube into the duct forming section and set it.
【０００４】本発明はかかる問題のないダクト形成用ゴ
ムホース製シース型を提供するものである。[0004] The present invention provides a rubber hose sheath type for forming a duct, which does not have such a problem.
【０００５】[0005]
【課題を解決するための手段】本発明のダクト形成用ゴ
ムホース製シース型は、隣接するプレキャストコンクリ
ートブロックの相対向する開口をもつ通孔間に挿通さ
れ、該プレキャストコンクリートブロックの間隙に充填
される硬化性部材の該通孔間を連結するダクトを形成す
る型となるダクト形成用ゴムホース製シース型であっ
て、両端部を構成し、少なくともその一方が軸方向に連
通する通孔をもつ係合部からなる一対の金具と、両端部
がそれぞれ一対の該金具に固定保持され、補強糸の編み
角度が中心軸と平行な線に対して３５度以下である補強
層と該補強層を埋設保持するゴム材からなり該係合部の
該通孔と連通する軸孔をもつホース部と、からなること
を特徴とする。The sheath type made of a rubber hose for forming a duct according to the present invention is inserted between through holes having opposing openings of adjacent precast concrete blocks, and is filled in the gaps of the precast concrete blocks. A sheath made of a rubber hose for forming a duct, which is a mold for forming a duct connecting the through holes of the curable member, wherein both ends are formed, and at least one of the engagements has a through hole communicating in the axial direction. A pair of metal fittings, and both ends are fixedly held to the pair of metal fittings, respectively, and the reinforcing layer and the reinforcing layer whose knitting angle of the reinforcing yarn is 35 degrees or less with respect to a line parallel to the central axis are embedded and held. And a hose part having a shaft hole communicating with the through hole of the engagement part.
【０００６】本発明のシース型は、一対の金具とホース
部とから構成されている。一対の金具の少なくとも一方
は軸方向に連通する通孔をもつ係合部で構成されてい
る。この係合部は、シース型を複数個線状に連結して使
用する時の連結部となったり、圧縮空気を挿入するため
のホースに連結される時に使用するものである。係合部
としてはこれらの機能をもつ通常のホースに使用される
金具を用いることが出来る。係合部以外の金具としては
一端を封止する栓となる金具を挙げることができる。一
対の金具を共に係止具とする場合は、一方が挿入先端部
を持つ係止具とし、他方がその挿入先端部を受入れ、係
合する被挿入凹部をもつ係止具とするのが好ましい。こ
れにより複数のシース型を連続した一本の長いシース型
とするのに都合がよい。The sheath type of the present invention comprises a pair of fittings and a hose. At least one of the pair of fittings is constituted by an engaging portion having a through-hole communicating in the axial direction. This engaging portion is used as a connecting portion when connecting and using a plurality of sheath types linearly, or when connecting to a hose for inserting compressed air. A fitting used for a normal hose having these functions can be used as the engaging portion. As a metal fitting other than the engaging portion, a metal fitting serving as a stopper for sealing one end can be given. When a pair of metal fittings is used as a locking tool, it is preferable that one is a locking tool having an insertion tip, and the other is a locking tool having an inserted recess to receive and engage the insertion tip. . This is convenient for making a plurality of sheath types into one continuous long sheath type.
【０００７】ホース部は両端部がそれぞれ一対の該金具
に固定保持され金具として機能する係合部の通孔と連通
する軸孔をもつ。このホース部は、補強糸の編み角度が
中心軸と平行な線に対して３５度以下である補強層とこ
の補強層を埋設保持するゴム材からなっている。補強層
が機械的強度を受持ち、耐久性を高める。補強層を形成
する補強糸の編み角度を３５度以下としている。このた
めこのホース部は径方向に膨張し易いが軸方向に変形し
にくい。さらに好ましい補強糸の編み角度は３０度以下
である。補強糸の編み角度を０度とすることにより軸方
向の変形をほぼ０とすることができる。[0007] The hose portion has a shaft hole which is fixedly held at both ends by a pair of the fittings and communicates with a through hole of an engaging portion functioning as a fitting. The hose portion is made of a reinforcing layer in which the knitting angle of the reinforcing yarn is 35 degrees or less with respect to a line parallel to the central axis, and a rubber material which buries and holds the reinforcing layer. The reinforcing layer is responsible for mechanical strength and increases durability. The knitting angle of the reinforcing yarn forming the reinforcing layer is 35 degrees or less. For this reason, the hose portion easily expands in the radial direction, but hardly deforms in the axial direction. A more preferable knitting angle of the reinforcing yarn is 30 degrees or less. By setting the knitting angle of the reinforcing yarn to 0 degree, the deformation in the axial direction can be made substantially zero.
【０００８】また、ホース部の補強層を構成する補強糸
の編み角度を一端側から他端側に編み角度が連続的に増
大するものとすることもできる。この場合には、編み角
度の小さい一端側から径方向に膨張し、径方向の膨張が
他端側に移る。これにより軸方向の変形に起因するプレ
キャストコンクリートブロックの通孔内表面との摩擦に
よるホース部の損傷を少なくすることができる。[0008] The knitting angle of the reinforcing yarn constituting the reinforcing layer of the hose portion may be continuously increased from one end to the other end. In this case, the swelling expands in the radial direction from one end where the knitting angle is small, and the expansion in the radial direction shifts to the other end. Thereby, damage to the hose portion due to friction with the inner surface of the through hole of the precast concrete block due to deformation in the axial direction can be reduced.
【０００９】また、ホース部には中心軸と平行に埋設さ
れた弾性材からなる弾性竿をもつものとすることができ
る。この弾性竿はホース部の軸方向の変形を阻止する。
本発明のダクト形成方法は、横締め孔をもつ同じ形状の
プレキャストコンクリートブロックを所定間隔を隔てて
並べるとともに形成される間隔にコンクリート打ち用型
を形成する、その後、両端部を構成し少なくともその一
方が軸方向に連通する通孔をもつ係合部からなる一対の
金具と、両端部がそれぞれ一対の該金具に固定保持さ
れ、補強糸の編み角度が中心軸と平行な線に対して３５
度以下である補強層と該補強層を埋設保持するゴム材か
らなり該係合部の該通孔と連通する軸孔をもつホース部
と、からなるダクト形成用ゴムホース製シース型を、端
側の該横締め孔開口より挿入し、配列した該プレキャス
トコンクリートブロックの各該横締め孔を一本の該シー
ス型で繋ぐ、この状態で該係止部に圧縮空気供給ホース
を取り付け、圧縮空気を該シース型内に導入し該ホース
部を各該横締め孔一杯に径方向に膨出させるとともに該
ホース部を硬い筒状とする、その後、該プレキャストコ
ンクリートブロック間の間隔にコンクリートを打設し、
この状態でコンクリートを養生してコンクリートを所定
硬さに固め、各該プレキャストコンクリートブロックが
一体的に連結されたプレキャストコンクリートブロック
とする、その後該シース型内の圧縮空気を外部に放出
し、該ホース部を元の細い形状に回復させ該シース型を
該プレキャストコンクリートブロックより引き抜き該プ
レキャストコンクリートブロックにダクトを形成するこ
とを特徴とする。The hose portion may have an elastic rod made of an elastic material embedded parallel to the central axis. This elastic rod prevents the deformation of the hose portion in the axial direction.
In the duct forming method of the present invention, a precast concrete block of the same shape having a lateral tightening hole is arranged at a predetermined interval and a concrete casting mold is formed at the formed interval, and thereafter, both ends are formed and at least one of them is formed. And a pair of fittings each having an engaging portion having a through-hole communicating with each other in the axial direction, and both ends thereof are fixed and held by the pair of fittings, respectively.
A sheath portion made of a rubber hose for duct formation, comprising a reinforcing layer having a strength of not more than a degree, and a hose portion made of a rubber material for burying and holding the reinforcing layer and having a shaft hole communicating with the through hole of the engaging portion. The lateral tightening holes of the precast concrete block that are inserted from the lateral tightening hole openings are connected by one sheath type. In this state, a compressed air supply hose is attached to the locking portion, and compressed air is supplied. Introduced into the sheath mold, the hose portion is radially swelled to fill each of the lateral tightening holes, and the hose portion is formed into a hard cylindrical shape. Then, concrete is poured into the space between the precast concrete blocks. ,
In this state, the concrete is cured to harden the concrete to a predetermined hardness to form a precast concrete block in which the precast concrete blocks are integrally connected. Thereafter, the compressed air in the sheath mold is released to the outside, and the hose is discharged. The portion is restored to its original thin shape, and the sheath is pulled out of the precast concrete block to form a duct in the precast concrete block.
【００１０】なお、本発明のダクト形成方法は、本発明
のシース型用いたことに特色が有り、他の部分は基本的
には従来のダクト形成方法と同じである。The duct forming method of the present invention is characterized by using the sheath type of the present invention, and the other parts are basically the same as the conventional duct forming method.
【００１１】[0011]
【作用・効果】本発明のダクト形成用ゴムホース製シー
ス型はそのホース部に補強層を持つ。このため機械的強
度に優れ、耐久性が高い。また、補強層を構成する補強
糸の編み角度が３５度以下となっているため、径方向に
膨張し易く軸方向には変形しにくい。このためシース型
として使用しやすい。また、両端部を構成する金具の少
なくとも一方は係合部で構成されている。この係合部
は、複数個繋いだり、圧縮空気を導入するため圧力ホー
スに結合するのに便利である。[Operation and Effect] The sheath type made of a rubber hose for forming a duct of the present invention has a reinforcing layer in the hose portion. Therefore, it has excellent mechanical strength and high durability. Further, since the knitting angle of the reinforcing yarn constituting the reinforcing layer is 35 degrees or less, the reinforcing yarn easily expands in the radial direction and hardly deforms in the axial direction. For this reason, it is easy to use as a sheath type. At least one of the metal fittings forming both ends is formed by an engaging portion. This engagement portion is convenient for connecting a plurality of portions or connecting to a pressure hose for introducing compressed air.
【００１２】本発明のダクト形成方法は使用するシース
型のホース部に補強層を持つため強度が高く、それ自身
の剛性も高い。このためダクト形成部が１０ｍとか２０
ｍの長さとなっても、片側からシース型を押し込むこと
ができ、片側からの操作でダクト形成が可能となる。ま
た、シース型のホース部の外面ゴムを厚くした場合は、
コンクリートとの擦れによる損傷が内面ゴムまで及ばな
いので、ホース部が破れる等の心配がない。このため長
期にわたって確実なダクトを形成できる。The duct forming method of the present invention has a high strength and a high rigidity because the sheath-type hose used has a reinforcing layer. For this reason, the duct formation part is 10m or 20m.
Even if the length is m, the sheath type can be pushed in from one side, and the duct can be formed by operation from one side. Also, when the outer rubber of the sheath type hose is thickened,
Since the damage due to the rubbing with the concrete does not reach the inner surface rubber, there is no fear that the hose portion is broken. For this reason, a reliable duct can be formed for a long time.
【００１３】[0013]
【実施例】本発明の実施例のダクト形成用ゴムホース製
シース型の中央部が欠損した断面図を図１に示す。この
シース型１は外径３４ｍｍ、内径２５．４ｍｍ、長さ２
０ｍの細長いチューブ状であり、栓となる金具２と係止
具３とホース部４とからなる。FIG. 1 is a cross-sectional view of a rubber hose for forming a duct according to an embodiment of the present invention. This sheath type 1 has an outer diameter of 34 mm, an inner diameter of 25.4 mm, and a length of 2
It is an elongated tube having a length of 0 m and includes a metal fitting 2 serving as a plug, a locking tool 3, and a hose 4.
【００１４】金具２は一端が閉じ他端開口の容器状の本
体部２１とこの本体部２１の一端側中央に溶接されたリ
ング２２と本体部２１と同軸的に配されホース部４の一
端部を本体部２１の外周面との間で挟持するかしめリン
グ２３とからなる。係止具３は軸孔を形成する内周面が
雌ねじとなった筒状の本体部３１とこの雌ねじに螺合し
ている雌エア金具３２および本体部３１と同軸的に配さ
れホース部４の他端部を本体部３１の外周面との間で挟
持するかしめリング３３とからなる。The metal fitting 2 has a container-shaped main body 21 having one end closed and an opening at the other end, a ring 22 welded to the center of one end of the main body 21, and one end of the hose 4 arranged coaxially with the main body 21. And a caulking ring 23 which clamps between the outer peripheral surface of the main body 21. The locking member 3 includes a cylindrical main body portion 31 having an inner peripheral surface forming a shaft hole and having a female screw, a female air fitting 32 screwed to the female screw, and a hose portion 4 coaxially arranged with the main body portion 31. And a caulking ring 33 which clamps the other end of the main body 31 with the outer peripheral surface of the main body 31.
【００１５】ホース部４はスチレン−ブタジエンゴムで
形成された厚さ１．５ｍｍの内面ゴム４１とクロロプレ
ンゴムで形成された厚さ２．０ｍｍの外面ゴム４２とこ
れら内面ゴム４１と外面ゴム４２との間に配置された第
一補強層４３および第二補強層４４とからなる。第一補
強層４３および第二補強層４４は、図２に示すように各
補強層４３、４４を形成する補強糸４５がホース部４１
の軸線と平行な線４０に対して互いに逆方向に編み角度
１５度、補強糸４５の間隔１ｍｍで織られてたものであ
る。The hose section 4 has an inner rubber 41 of 1.5 mm in thickness made of styrene-butadiene rubber, an outer rubber 42 of 2.0 mm in thickness made of chloroprene rubber, and these inner rubber 41 and outer rubber 42. The first reinforcement layer 43 and the second reinforcement layer 44 are disposed between the first reinforcement layer 43 and the second reinforcement layer 44. As shown in FIG. 2, the first reinforcing layer 43 and the second reinforcing layer 44 are formed by reinforcing yarns 45 forming the respective reinforcing layers 43 and 44 with the hose portion 41.
Are woven at a knitting angle of 15 degrees and a spacing of 1 mm between the reinforcing yarns 45 in directions opposite to each other with respect to a line 40 which is parallel to the axis.
【００１６】このホース部４は通常のゴムホースと同様
に内面ゴム４１を押し出し成形し、その外周面に第一補
強層４３を配置しさらに第二補強層４４を編み込み、最
後に外面ゴム４２をその外側に重ねて押し出し、得られ
たものを加熱加硫し、２０ｍの長さに切断したものであ
る。そしてこのホース部４の両端開口部に金具２と係止
具３との本体部２１、３１を挿入するとともにホース部
４の両端部分の外周面にかしめリング２３、３３を重ね
てはめ込み、さらにかしめ加工して金具２と係止具３と
の本体部２１、３１の外周面とかしめリング２３、３３
の内周面との間でホース部４の両端部分を挟持させたも
のである。The hose portion 4 is formed by extruding an inner rubber 41 in the same manner as a normal rubber hose, arranging a first reinforcing layer 43 on an outer peripheral surface thereof, further knitting a second reinforcing layer 44, and finally attaching the outer rubber 42 to the outer rubber 42. It was extruded on the outside, heated, vulcanized and cut to a length of 20 m. Then, the main bodies 21 and 31 of the metal fitting 2 and the locking tool 3 are inserted into the opening portions at both ends of the hose portion 4, and the caulking rings 23 and 33 are overlapped and fitted on the outer peripheral surfaces of both end portions of the hose portion 4, and further caulked. The outer peripheral surfaces of the main bodies 21 and 31 of the metal fitting 2 and the locking tool 3 and the caulking rings 23 and 33
The both ends of the hose portion 4 are sandwiched between the inner peripheral surface of the hose.
【００１７】本実施例のダクト形成用ゴムホース製シー
ス型１は前記した構成を持つ。このシース型１は内径４
６ｍｍのダクトを形成するために設計されたものであり
その係止部３の雌エア金具３２の開口に図示しない雄エ
ア金具をもつ圧縮空気供給ホースが結合され、ホース部
４の内部に圧縮空気が導入される。本実施例のシース型
１では２〜５Ｋｇ／ｃｍ2 の圧縮空気を用いる設計にな
っている。そしてこのホース部４は圧縮空気の作用で外
周径が３８ｍｍ〜５２ｍｍに膨張する。なお、この時の
ホースの長さ方向の縮み量は、初期長さの８〜１２％で
あり、実用上問題のない程度であった。The duct-forming rubber hose sheath mold 1 of this embodiment has the above-described configuration. This sheath type 1 has an inner diameter of 4
A compressed air supply hose having a male air fitting (not shown) is connected to an opening of the female air fitting 32 of the locking portion 3 and is designed to form a 6 mm duct. Is introduced. The sheath type 1 of this embodiment is designed to use compressed air of 2 to 5 kg / cm 2 . The outer diameter of the hose portion 4 expands to 38 mm to 52 mm by the action of compressed air. At this time, the amount of shrinkage in the length direction of the hose was 8 to 12% of the initial length, which was a practically acceptable level.
【００１８】このシース型１の使用方法も従来のシース
型と同じである。簡単に説明すると、まず、図３に示す
ように、横締め孔８１をもつ同じ形状のプレキャストコ
ンクリートブロック８を所定間隔を隔てて並べる。次に
この間隔の底に板を張りコンクリート打ち用型９を形成
する。そして型９内に補強鉄筋（図示せず）を組む。そ
の次に本実施例のシース型１を端側の横締め孔８１開口
より挿入し、配列したプレキャストコンクリートブロッ
ク８の横締め孔８１を一本のシース型１で繋ぐ。この状
態で係止部３の雌エア金具３２の開口に図示しない雄エ
ア金具をもつ圧縮空気供給ホースを取り付け、圧縮空気
をシース型１内に導入する。これによりシース型１のホ
ース部４が径方向に膨れ、各プレキャストコンクリート
ブロックの横締め孔の一杯に膨れる。図４はホース部４
が膨れた状態を示している。そして隣接するプレキャス
トコンクリートブロック８間の間隔に位置するホース部
４の部分も径方向に膨れ、圧縮空気の内部押圧力とこれ
に対向する第一補強層４３および第二補強層４４の反発
力で硬い筒状となる。The method of using the sheath type 1 is the same as that of the conventional sheath type. Briefly, first, as shown in FIG. 3, precast concrete blocks 8 having the same shape and having lateral tightening holes 81 are arranged at predetermined intervals. Next, a plate is stretched at the bottom of this interval to form a concrete driving die 9. Then, a reinforcing bar (not shown) is assembled in the mold 9. Next, the sheath mold 1 of this embodiment is inserted through the opening of the lateral tightening hole 81 on the end side, and the lateral tightening holes 81 of the arranged precast concrete blocks 8 are connected by one sheath mold 1. In this state, a compressed air supply hose having a male air fitting (not shown) is attached to the opening of the female air fitting 32 of the locking portion 3, and compressed air is introduced into the sheath mold 1. As a result, the hose portion 4 of the sheath mold 1 swells in the radial direction, and swells to fill the lateral tightening hole of each precast concrete block. Figure 4 shows the hose part 4
Indicates a swollen state. The portion of the hose portion 4 located at the interval between the adjacent precast concrete blocks 8 also swells in the radial direction, and the internal pressing force of the compressed air and the repulsive force of the first reinforcing layer 43 and the second reinforcing layer 44 opposed thereto. It becomes a hard cylindrical shape.
【００１９】この後、プレキャストコンクリートブロッ
ク８間の間隔にコンクリート８５を打設し、この状態で
コンクリート８５を養生し、コンクリート８５を所定硬
さに固める。これにより各プレキャストコンクリートブ
ロック８が一体的に連結されたプレキャストコンクリー
トブロックとなる。この状態でシース型１内の圧縮空気
を外部に放出し、ホース部４のゴム弾性で形状を回復さ
せ元の細い形状に戻す。これによりホース部４は横締め
孔８１を形成する内面より離れ、また、新たに打設され
たコンクリート８５からも離れる。その状態でシース型
１は形成されたプレキャストコンクリートブロックから
引き抜かれる。これにより、図５に示すように、このプ
レキャストコンクリートブロックにＰＣ鋼材挿通用のダ
クト８０が形成される。Thereafter, concrete 85 is poured into the space between the precast concrete blocks 8, and the concrete 85 is cured in this state, and the concrete 85 is hardened to a predetermined hardness. Thereby, each precast concrete block 8 becomes a precast concrete block integrally connected. In this state, the compressed air in the sheath mold 1 is released to the outside, and the shape is restored by the rubber elasticity of the hose portion 4 to return to the original thin shape. As a result, the hose portion 4 separates from the inner surface forming the lateral tightening hole 81 and also separates from the newly cast concrete 85. In this state, the sheath mold 1 is pulled out from the formed precast concrete block. Thereby, as shown in FIG. 5, the duct 80 for inserting the PC steel material is formed in the precast concrete block.
【００２０】このダクト８０は、圧縮空気で膨れたシー
ス型１と同じ形状の通孔となっている。このためＰＣ鋼
材を容易に挿通できる。本実施例のダクト形成用ゴムホ
ース製シース型１は、図１に示すように、ホース部４に
第一および第二補強層４３、４４を持つ。このため機械
的強度に優れ、耐久性が高い。また、第一および第二補
強層４３、４４はその補強糸４５が軸と平行な線に対し
て１５度となるように織られている。このため、径方向
に膨張し易く軸方向には変形しにくい。このためシース
型として使用しやすい。また、両端部を構成する金具の
一方は係合部３で構成されている。この係合部３は圧縮
空気を導入するため圧力ホースに結合するのに便利であ
る。This duct 80 is a through hole having the same shape as the sheath mold 1 swelled with compressed air. Therefore, the PC steel material can be easily inserted. As shown in FIG. 1, a hose forming sheath 1 made of a rubber hose for forming a duct has first and second reinforcing layers 43 and 44 in a hose portion 4. Therefore, it has excellent mechanical strength and high durability. Further, the first and second reinforcing layers 43 and 44 are woven so that the reinforcing threads 45 are at 15 degrees with respect to a line parallel to the axis. For this reason, it expands easily in the radial direction and is hardly deformed in the axial direction. For this reason, it is easy to use as a sheath type. One of the metal fittings forming both ends is formed by the engaging portion 3. This engaging part 3 is convenient for coupling to a pressure hose for introducing compressed air.
【００２１】本実施例のダクト形成用ゴムホース製シー
ス型１では、その一端に栓となる金具２を用いた。しか
し図６に示すように、栓となる金具２に代えて雄エア金
具５を用い、ホース部４の両端に雌エア金具３および雄
エア金具５を取り付けてもよい。この場合には、図６に
示すように、第一のシース型１の雌エア金具３に第二の
シース型１の雄エア金具５を装着し、一本の長いシース
型を形成できる。In the sheath type 1 made of a rubber hose for forming a duct of this embodiment, a metal fitting 2 serving as a stopper is used at one end thereof. However, as shown in FIG. 6, a male air fitting 5 may be used instead of the fitting 2 serving as a plug, and the female air fitting 3 and the male air fitting 5 may be attached to both ends of the hose portion 4. In this case, as shown in FIG. 6, the male air fitting 5 of the second sheath type 1 is attached to the female air fitting 3 of the first sheath type 1 to form one long sheath type.
【００２２】また、図７に示すように、補強層を構成す
る補強糸４５がホース部４１の軸線と平行な線４０に対
して平行に簾状に配置したものとすることができる。こ
れにより一層径方向に膨張し易く軸方向には変形しにく
くなる。Further, as shown in FIG. 7, the reinforcing yarns 45 constituting the reinforcing layer may be arranged in a line shape parallel to a line 40 parallel to the axis of the hose portion 41. This makes it easier to expand in the radial direction and less likely to deform in the axial direction.
【図１】本発明の実施例のダクト形成用ゴムホース製シ
ース型の中央部を欠損した断面図である。FIG. 1 is a sectional view of a sheath type made of a rubber hose for forming a duct according to an embodiment of the present invention, in which a central portion is missing.
【図２】実施例のホース部の第一および第二補強層を形
成する補強糸の配列を示す図である。FIG. 2 is a view showing an arrangement of reinforcing yarns forming first and second reinforcing layers of a hose portion of an embodiment.
【図３】横締め孔をもつプレキャストコンクリートブロ
ックを所定の位置に並べ、型枠を組み立てた状態を示す
図である。FIG. 3 is a view showing a state where precast concrete blocks having lateral tightening holes are arranged at predetermined positions and a formwork is assembled.
【図４】横締め孔内に挿入したゴムホース製シース型に
圧縮空気を導入してホース部を膨大させ、かつブロック
間にコンクリートを打設した状態を示す図である。FIG. 4 is a view showing a state in which compressed air is introduced into a sheath type made of a rubber hose inserted into a lateral tightening hole to enlarge the hose portion, and concrete is poured between blocks.
【図５】ダクトが形成された状態を示す図である。FIG. 5 is a diagram showing a state in which a duct is formed.
【図６】連結可能な２個のシース型の各端部を示す断面
図である。FIG. 6 is a cross-sectional view showing two end portions of two connectable sheath types.
【図７】補強層を形成する補強糸の他の配列を示す図で
ある。FIG. 7 is a diagram showing another arrangement of reinforcing yarns forming a reinforcing layer.
１─シース型 ２─金具 ３─係止具 ４─ホース部 ５─雄エア金具 ８─プレキャスト
コンクリート ９─型枠 ４１─内面ゴム ４２─外面ゴム ４３─第一補強層 ４４─第二補強層 ４５─補強糸 ８０─ダクト ８２─横締め孔 ８５─コンクリートDESCRIPTION OF SYMBOLS 1 << sheath type 2 >> metal fittings 3 >> locking tools 4 >> hose parts 5 >> male air fittings 8 >> precast concrete 9 >> formwork 41 >> inner surface rubber 42 >> outer surface rubber 43 >> first reinforcement layer 44 >> second reinforcement layer 45 ─Reinforcing thread 80─Duct 82─Side tightening hole 85─Concrete
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−102197（ＪＰ，Ａ) 特開 昭64−102197（ＪＰ，Ａ) 実開 昭60−58304（ＪＰ，Ｕ) 実開 平１−141895（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) E04G 21/12 104 B28B 7/32 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-102197 (JP, A) JP-A-64-102197 (JP, A) JP-A-60-58304 (JP, U) JP-A-1-102197 141895 (JP, U) (58) Field surveyed (Int. Cl. 7 , DB name) E04G 21/12 104 B28B 7/32
Claims (6)
クの相対向する開口をもつ通孔間に挿通され、該プレキ
ャストコンクリートブロックの間隙に充填される硬化性
部材の該通孔間を連結するダクトを形成する型となるダ
クト形成用ゴムホース製シース型であって、 両端部を構成し、少なくともその一方が軸方向に連通す
る通孔をもつ係合部からなる一対の金具と、 両端部がそれぞれ一対の該金具に固定保持され、補強糸
の編み角度が中心軸と平行な線に対して３５度以下であ
る補強層と該補強層を埋設保持するゴム材からなり該係
合部の該通孔と連通する軸孔をもつホース部と、からな
ることを特徴とするダクト形成用ゴムホース製シース
型。1. A mold which is inserted between through-holes having opposing openings of adjacent precast concrete blocks and forms a duct connecting between the through-holes of a hardening member filled in a gap of the precast concrete block. A pair of metal fittings, each of which has both ends, at least one of which has an engaging portion having a through hole communicating in the axial direction, and both ends of which are a pair of metal fittings. A reinforcing layer having a knitting angle of 35 degrees or less with respect to a line parallel to the central axis, and a rubber material which embeds and holds the reinforcing layer, and communicates with the through hole of the engaging portion. A sheath type made of a rubber hose for forming a duct, comprising a hose portion having a shaft hole.
編み角度は０度である請求項１記載のダクト形成用ゴム
ホース製シース型。2. The sheath type made of a rubber hose for forming a duct according to claim 1, wherein the knitting angle of the reinforcing yarn constituting the reinforcing layer of the hose portion is 0 °.
編み角度は一端側から他端側に編み角度が連続的に増大
する請求項１記載のダクト形成用ゴムホース製シース
型。3. The sheath type made of a rubber hose for forming a duct according to claim 1, wherein the knitting angle of the reinforcing yarn constituting the reinforcing layer of the hose portion continuously increases from one end to the other end.
角３５度以下で、互いに逆方向に複層に巻かれて形成さ
れ、該ゴム材は該補強層を挟持する内面ゴムと外面ゴム
とで構成され、該内面ゴムの厚みより該外面ゴムの厚み
が大である請求項１記載のダクト形成用ゴムホース製シ
ース型。4. The reinforcing layer is formed by winding a reinforcing yarn made of a chemical fiber into a plurality of layers in a direction opposite to each other at a knitting angle of 35 ° or less, and the rubber material includes an inner rubber and an outer surface which sandwich the reinforcing layer. The sheath type made of a rubber hose for forming a duct according to claim 1, wherein the outer rubber is made thicker than the inner rubber.
性材からなる弾性竿をもつ請求項１記載のダクト形成用
ゴムホース製シース型。5. A sheath type made of a rubber hose for forming a duct according to claim 1, wherein said reinforcing layer has an elastic rod made of an elastic material embedded parallel to said central axis.
ンクリートブロックを所定間隔を隔てて並べるとともに
形成される間隔にコンクリート打ち用型を形成する、 その後、両端部を構成し少なくともその一方が軸方向に
連通する通孔をもつ係合部からなる一対の金具と、両端
部がそれぞれ一対の該金具に固定保持され、補強糸の編
み角度が中心軸と平行な線に対して３５度以下である補
強層と該補強層を埋設保持するゴム材からなり該係合部
の該通孔と連通する軸孔をもつホース部と、からなるダ
クト形成用ゴムホース製シース型を、端側の該横締め孔
開口より挿入し、配列した該プレキャストコンクリート
ブロックの各該横締め孔を一本の該シース型で繋ぐ、こ
の状態で該係止部に圧縮空気供給ホースを取り付け、圧
縮空気を該シース型内に導入し該ホース部を各該横締め
孔一杯に径方向に膨出させるとともに該ホース部を硬い
筒状とする、 その後、該プレキャストコンクリートブロック間の間隔
にコンクリートを打設し、この状態でコンクリートを養
生してコンクリートを所定硬さに固め、各該プレキャス
トコンクリートブロックが一体的に連結されたプレキャ
ストコンクリートブロックとする、 その後該シース型内の圧縮空気を外部に放出し、該ホー
ス部を元の細い形状に回復させ該シース型を該プレキャ
ストコンクリートブロックより引き抜き該プレキャスト
コンクリートブロックにダクトを形成することを特徴と
するプレキャストコンクリートブロックのダクト形成方
法。6. Precast concrete blocks of the same shape having lateral tightening holes are arranged at predetermined intervals, and concrete casting dies are formed at the intervals formed. Thereafter, both ends are formed and at least one of them is formed in the axial direction. And a pair of metal fittings each having an engaging portion having a through hole communicating with the bracket, and both ends thereof are fixedly held by the pair of metal fittings, and the knitting angle of the reinforcing yarn is 35 degrees or less with respect to a line parallel to the central axis. A duct-forming rubber hose sheath type comprising a reinforcing layer and a rubber material for embedding and holding the reinforcing layer and having a shaft hole communicating with the through hole of the engaging portion, is laterally tightened on the end side. The lateral tightening holes of the precast concrete block arranged and inserted from the hole opening are connected by one sheath type. In this state, a compressed air supply hose is attached to the locking portion, and compressed air is supplied to the sheath type. And the hose portion is radially swelled to fill each of the lateral tightening holes, and the hose portion is formed into a hard cylindrical shape. Then, concrete is poured into the space between the precast concrete blocks, The concrete is cured to harden the concrete to a predetermined hardness to form a precast concrete block in which the respective precast concrete blocks are integrally connected. Thereafter, the compressed air in the sheath mold is released to the outside, and the hose portion is removed. A method for forming a duct of a precast concrete block, wherein the duct is formed in the precast concrete block by restoring the sheath mold to its original thin shape and extracting the sheath form from the precast concrete block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04421095A JP3229150B2 (en) | 1995-03-03 | 1995-03-03 | Rubber hose sheath type for duct formation and duct formation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04421095A JP3229150B2 (en) | 1995-03-03 | 1995-03-03 | Rubber hose sheath type for duct formation and duct formation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08238612A JPH08238612A (en) | 1996-09-17 |
| JP3229150B2 true JP3229150B2 (en) | 2001-11-12 |
Family
ID=12685199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04421095A Expired - Fee Related JP3229150B2 (en) | 1995-03-03 | 1995-03-03 | Rubber hose sheath type for duct formation and duct formation method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3229150B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6548546B2 (en) * | 2015-10-09 | 2019-07-24 | 鹿島建設株式会社 | Bonding method of precast block |
| JP2018017098A (en) * | 2016-07-29 | 2018-02-01 | ジャパンパイル株式会社 | Concrete pile |
-
1995
- 1995-03-03 JP JP04421095A patent/JP3229150B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08238612A (en) | 1996-09-17 |
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