JP6593829B1

JP6593829B1 - Pulley

Info

Publication number: JP6593829B1
Application number: JP2019043223A
Authority: JP
Inventors: 健二小倉
Original assignee: KENTECH SYSTEMS LIMITED
Current assignee: KENTECH SYSTEMS LIMITED
Priority date: 2019-03-08
Filing date: 2019-03-08
Publication date: 2019-10-23
Anticipated expiration: 2039-03-08
Also published as: JP2020143775A

Abstract

【課題】荷重が大きくなってもロープがプーリ中心側に寄らず、ロープが傷んだり、けん引速度が遅くなり過ぎたりし難いプーリを提供する。【解決手段】プーリ２０は、ロープ溝２１の対向する左右の内側壁面２１Ａ、２１Ｂに、周方向に放射状に配設した多数の左突起部２２Ａと右突起部２２Ｂが左右に間隔を開けて左右対称に対向して突設されており、ロープ溝２１の中の左突起部２２Ａと右突起部２２Ｂの間にけん引ロープ７を挿入して巻き掛けるものである。対向する各一対の左突起部２２Ａと右突起部２２Ｂに対応付けて、左突起部２２Ａの内周寄り端部と右突起部２２Ｂの内周寄り端部の間に凸側が外周方向を向いた外向き突起部２２Ｃを設け、一対の左突起部２２Ａと右突起部２２Ｂ及びこれらの内周寄り端部間設けた外向き突起部２２Ｃとにより、ロープ溝２１に巻かれたけん引ロープ７の断面が略コ字状または略Ｕ字状に挟まれるようにする。【選択図】図６PROBLEM TO BE SOLVED: To provide a pulley in which the rope does not approach the pulley center even when the load increases, and the rope is not easily damaged or the towing speed is not too slow. SOLUTION: A pulley 20 has a large number of left protrusions 22A and right protrusions 22B radially arranged on the left and right inner wall surfaces 21A and 21B facing the rope groove 21 in the left and right directions, and left and right. Projecting symmetrically, the tow rope 7 is inserted and wound between the left projection 22A and the right projection 22B in the rope groove 21. Corresponding to each pair of left protrusion 22A and right protrusion 22B that face each other, the convex side faces the outer peripheral direction between the inner peripheral edge of the left protrusion 22A and the inner peripheral edge of the right protrusion 22B. A cross section of the tow rope 7 wound around the rope groove 21 by the outward protruding portion 22C and the pair of the left protruding portion 22A, the right protruding portion 22B, and the outward protruding portion 22C provided between the inner peripheral ends. Is sandwiched between substantially U-shapes or U-shapes. [Selection] Figure 6

Description

本発明はプーリに係り、とくにロープ溝に放射状に多数の突起部が形成されたプーリに関する。 The present invention relates to a pulley, and more particularly to a pulley in which a large number of protrusions are formed radially in a rope groove.

電動式の登高器やロープけん引装置では、ロープを巻きかけたプーリを電動ドライバやモータ等の回転駆動手段により回転駆動し、ロープをプーリの周方向へ移動して、登高器を上昇させたり、ロープをけん引したりするようにしている。図１、図２は従来の電動式のロープけん引装置の概略構成図であり、略方形板状の本体１の中央にプーリ２が回転自在に装備されており、プーリ２の上側の左右に入り口ロープガイド３、出口ロープガイド４が装着されている。プーリ２の下側には固定ロープ５を取り付けるためのロープ取り付け孔６が形成されている。本体１に搭載された図示しない減速機構の出力側の回転軸８がプーリ２の軸孔９に嵌着されている。 In an electric climber or rope towing device, the pulley around which the rope is wound is driven to rotate by a rotational drive means such as an electric screwdriver or motor, and the rope is moved in the circumferential direction of the pulley to raise the climber, I try to tow the rope. FIG. 1 and FIG. 2 are schematic configuration diagrams of a conventional electric rope towing device. A pulley 2 is rotatably mounted at the center of a substantially rectangular plate-shaped main body 1, and entrances on the left and right sides of the upper side of the pulley 2 are shown. A rope guide 3 and an exit rope guide 4 are mounted. A rope attachment hole 6 for attaching the fixed rope 5 is formed below the pulley 2. A rotating shaft 8 on the output side of a reduction mechanism (not shown) mounted on the main body 1 is fitted in the shaft hole 9 of the pulley 2.

ロープけん引装置を使用する場合、ロープ取り付け孔６に固定ロープ５の一端側を取り付け、他端側を柱等に固定しておく。また、一端側がけん引対象物に締結されたけん引ロープ７の他端側を入り口ロープガイド３、プーリ２のロープ溝１０、出口ロープガイド４に巻きかけておく。プーリ２が装着された回転軸８を図示しない減速機構を介して電動ドライバにより反時計方向に回転させると、けん引ロープ７がプーリ２の周方向に沿って移動し、けん引対象物を装置側へけん引する。 When the rope towing device is used, one end side of the fixed rope 5 is attached to the rope attachment hole 6 and the other end side is fixed to a pillar or the like. Further, the other end of the tow rope 7 whose one end is fastened to the object to be pulled is wound around the entrance rope guide 3, the rope groove 10 of the pulley 2, and the exit rope guide 4. When the rotating shaft 8 to which the pulley 2 is attached is rotated counterclockwise by an electric driver through a speed reduction mechanism (not shown), the tow rope 7 moves along the circumferential direction of the pulley 2 and the object to be pulled is moved to the apparatus side. Tow.

ところで、プーリ２のロープ溝１０が単純なＶ字溝のままであると、けん引ロープ７に合成繊維ロープや麻ロープを用いたときにけん引ロープ７とプーリ２の間に滑りが生じ易い。このため、従来から、図１、図２に示す如くロープ溝１０の内壁面１０Ａ、１０Ｂに対向させて放射状に断面山形の多数の突起部１１Ａ、１１Ｂを突設しておき、プーリ２に巻き掛けたけん引ロープ７が対向する突起部１１Ａ、１１Ｂの間に挟まると、突起部１１Ａと１１Ｂがけん引ロープ７に食い込んで滑りにくくなるようにしている。 By the way, if the rope groove 10 of the pulley 2 remains a simple V-shaped groove, slippage is likely to occur between the tow rope 7 and the pulley 2 when a synthetic fiber rope or hemp rope is used for the tow rope 7. For this reason, conventionally, as shown in FIGS. 1 and 2, a large number of protrusions 11 A and 11 B having a mountain-shaped cross section are radially provided to face the inner wall surfaces 10 A and 10 B of the rope groove 10 and wound around the pulley 2. When the hung tow rope 7 is sandwiched between the opposing projecting portions 11A and 11B, the projecting portions 11A and 11B bite into the tow rope 7 so that it is difficult to slip.

けれども、けん引ロープ７に掛かる荷重が大きくなったとき、図３に示す如く、けん引ロープ７がプーリ２の中心側に寄ってしまい（図３の矢印Ｘ参照）、左右の突起部１１Ａ、１１Ｂ間にけん引ロープ７が強く挟圧されて傷んだり、プーリ２の中心とプーリ２に巻かれたけん引ロープ７の距離が短くなって電動ドライバの負荷が激増し、けん引速度が遅くなり過ぎたり、けん引不能になったりする問題があった。 However, when the load applied to the tow rope 7 increases, as shown in FIG. 3, the tow rope 7 moves closer to the center side of the pulley 2 (see arrow X in FIG. 3), and between the left and right projections 11A and 11B. The tow rope 7 is strongly pinched and damaged, the distance between the center of the pulley 2 and the tow rope 7 wound around the pulley 2 is shortened, and the load of the electric driver is drastically increased. There was a problem that made it impossible.

本発明は上記した従来技術の問題に鑑みなされたもので、荷重が大きくなってもロープがプーリ中心側に寄らず、ロープが傷んだり、けん引速度が遅くなり過ぎたりけん引不能になったりし難いプーリを提供することを、その目的とする。 The present invention has been made in view of the above-described problems of the prior art, and even when the load increases, the rope does not approach the pulley center side, and the rope is not easily damaged, the pulling speed is too slow, or it is difficult to pull. The purpose is to provide a pulley.

請求項１記載の発明では、
ロープ溝の対向する左右の内側壁面の各々に、周方向に放射状に配設した多数の左突起部と右突起部が左右に間隔を開けて左右対称に対向して突設されており、ロープ溝の中の左突起部と右突起部の間にロープを挿入して巻き掛けるようにしたプーリにおいて、
対向する各一対の左突起部と右突起部をプーリの左右方向の中心に向けて凸な断面山形に形成し、
対向する各一対の左突起部と右突起部に対応付けて、左突起部の内周寄り端部と右突起部の内周寄り端部の間に凸側が外周方向を向いた外向き突起部を設け、
一対の左突起部と右突起部及びこれらの左突起部と右突起部の内周寄り端部間に設けた外向き突起部とにより、ロープ溝に巻かれたロープの断面が略コ字状または略Ｕ字状に挟まれるようにしたこと、
を特徴としている。
請求項２記載の発明では、
ロープ溝の対向する左右の内側壁面の各々に、周方向に放射状に配設した多数の左突起部と右突起部が左右に間隔を開けて左右対称に対向して突設されており、ロープ溝の中の左突起部と右突起部の間にロープを挿入して巻き掛けるようにしたプーリにおいて、
対向する各一対の左突起部と右突起部に対応付けて、左突起部の内周寄り端部と右突起部の内周寄り端部の間に凸側が外周方向を向いた外向き突起部を設け、
一対の左突起部と右突起部及びこれらの左突起部と右突起部の内周寄り端部間に設けた外向き突起部とにより、ロープ溝に巻かれたロープの断面が略コ字状または略Ｕ字状に挟まれるようにし、
更に、
対向する各一対の左突起部と右突起部は、プーリ中心からの半径方向から、プーリのけん引回転方向と同じ方向に傾斜して設けたこと、
を特徴としている。
請求項３記載の発明では、
ロープ溝の対向する左右の内側壁面の各々に、周方向に放射状に配設した多数の左突起部と右突起部が左右に間隔を開けて左右対称に対向して突設されており、ロープ溝の中の左突起部と右突起部の間にロープを挿入して巻き掛けるようにしたプーリにおいて、
対向する各一対の左突起部と右突起部に対応付けて、左突起部の内周寄り端部と右突起部の内周寄り端部の間に凸側が外周方向を向いた外向き突起部を設け、
一対の左突起部と右突起部及びこれらの左突起部と右突起部の内周寄り端部間に設けた外向き突起部とにより、ロープ溝に巻かれたロープの断面が略コ字状または略Ｕ字状に挟まれるようにし、
外向き突起部のプーリ軸に垂直な断面は、外向き突起部が対応する一対の左突起部と右突起部の延びた方向に向けて山形となっていること、
を特徴としている。
請求項４記載の発明では、
外向き突起部のプーリ軸に垂直な断面は、外向き突起部が対応する一対の左突起部と右突起部の延びた方向に向けて山形となっていること、
を特徴としている。 In invention of Claim 1,
A large number of left protrusions and right protrusions arranged radially in the circumferential direction on each of the opposing left and right inner wall surfaces of the rope groove protrude in a symmetrical manner with left and right spacing. In the pulley that is inserted and wrapped around the left protrusion and the right protrusion in the groove,
Each of the pair of left and right protrusions facing each other is formed in a convex cross-sectional mountain shape toward the center in the left-right direction of the pulley,
In correspondence with each pair of left and right protrusions facing each other, an outward protrusion with the convex side facing the outer peripheral direction between the inner peripheral edge of the left protrusion and the inner peripheral edge of the right protrusion Provided,
The cross section of the rope wound in the rope groove is substantially U-shaped by the pair of left and right protrusions and the outward protrusion provided between the left and right protrusions. Or that it is sandwiched between approximately U-shapes,
It is characterized by .
In invention of Claim 2,
A large number of left protrusions and right protrusions arranged radially in the circumferential direction on each of the opposing left and right inner wall surfaces of the rope groove protrude in a symmetrical manner with left and right spacing. In the pulley that is inserted and wrapped around the left protrusion and the right protrusion in the groove,
In correspondence with each pair of left and right protrusions facing each other, an outward protrusion with the convex side facing the outer peripheral direction between the inner peripheral edge of the left protrusion and the inner peripheral edge of the right protrusion Provided,
The cross section of the rope wound in the rope groove is substantially U-shaped by the pair of left and right protrusions and the outward protrusion provided between the left and right protrusions. Or make it sandwiched in a substantially U shape,
Furthermore,
Each pair of the left protruding portion facing the right protrusions in the radial direction from the pulley center, and the kite provided obliquely in the same direction as the traction rotation direction of the pulley,
It is characterized by.
In invention of Claim 3,
A large number of left protrusions and right protrusions arranged radially in the circumferential direction on each of the opposing left and right inner wall surfaces of the rope groove protrude in a symmetrical manner with left and right spacing. In the pulley that is inserted and wrapped around the left protrusion and the right protrusion in the groove,
In correspondence with each pair of left and right protrusions facing each other, an outward protrusion with the convex side facing the outer peripheral direction between the inner peripheral edge of the left protrusion and the inner peripheral edge of the right protrusion Provided,
The cross section of the rope wound in the rope groove is substantially U-shaped by the pair of left and right protrusions and the outward protrusion provided between the left and right protrusions. Or make it sandwiched in a substantially U shape,
The cross section of the outward protrusion perpendicular to the pulley axis is chevron-shaped toward the direction in which the pair of left protrusion and right protrusion correspond to the outward protrusion,
It is characterized by.
In invention of Claim 4,
The cross section of the outward protrusion perpendicular to the pulley axis is chevron-shaped toward the direction in which the pair of left protrusion and right protrusion correspond to the outward protrusion,
It is characterized by.

本発明によれば、プーリに巻きかけたロープに掛かる荷重が大きくなって、プーリの中心寄りに移動しようとしても、外向き突起部に当接して邪魔されるので、プーリの中心側に寄ることはなく、ロープが傷んだり、けん引速度が遅くなり過ぎたりけん引不能になったりする不具合が生じ難くなる。 According to the present invention, the load applied to the rope wound around the pulley is increased, and even when trying to move closer to the center of the pulley, it is obstructed by coming into contact with the outward projection, so it approaches the center side of the pulley. There is no problem that the rope is damaged, the towing speed becomes too slow, or the tow becomes impossible.

図１は従来のロープけん引装置の概略構成図である。FIG. 1 is a schematic configuration diagram of a conventional rope towing apparatus. 図２は図１中のプーリの正面図である。FIG. 2 is a front view of the pulley in FIG. 図１中のプーリの問題点の説明図である。It is explanatory drawing of the problem of the pulley in FIG. 本発明の一実施例に係るプーリの外観斜視図である。It is an external appearance perspective view of the pulley which concerns on one Example of this invention. 図４の正面図である。FIG. 5 is a front view of FIG. 4. 図４のプーリの右側面図である。It is a right view of the pulley of FIG. 図５のＶＩＩ−ＶＩＩ’線に沿った断面図である。FIG. 7 is a cross-sectional view taken along line VII-VII ′ in FIG. 5. 図４のプーリの変形例に掛かるプーリ半体の説明図である。It is explanatory drawing of the pulley half body concerning the modification of the pulley of FIG. 図８と対を成すプーリ半体の説明図である。It is explanatory drawing of the pulley half body which makes a pair with FIG.

以下、本発明の最良の形態を実施例に基づき説明する。 Hereinafter, the best mode of the present invention will be described based on examples.

図４乃至図７を参照して本発明に係るプーリの一実施例を説明する。図４は本発明に係るプーリの外観斜視図、図５は図４の正面図、図６は図４の右側面図、図７は図５のＶＩＩ−ＶＩＩ’線に沿った断面図である。なお、図１乃至図３と同一の構成部分には同一の符号が付してある。
図４乃至図７において、２０はアルミ製のプーリであり、ここでは、図１のロープけん引装置のプーリ２に代えて用いられるものとする。プーリ２０のＶ字状のロープ溝（Ｖ字溝）２１の左内壁面２１Ａと右内壁面２１Ｂの各々には、周方向に放射状に配設した多数の左突起部２２Ａと右突起部２２Ｂが左右方向（軸方向）に間隔を開けて左右対称に対向して突設されている。プーリ２０のけん引回転方向が図６の反時計方向であるとき、対向する各一対の左突起部２２Ａ、右突起部２２Ｂは、プーリ２０の中心からの半径方向に対し（図６の符号Ａ参照）、θだけ少し反時計方向へ傾斜して配設されており、左突起部２２Ａ、右突起部２２Ｂがけん引ロープ７に食い込み易くなっている（若し、プーリ２０のけん引回転方向が図６の時計方向であるときは、対向する各一対の左突起部２２Ａ、右突起部２２Ｂを、プーリ２０の中心からの半径方向に対し、θだけ少し時計方向へ傾斜させて配設する）。 An embodiment of the pulley according to the present invention will be described with reference to FIGS. 4 is an external perspective view of the pulley according to the present invention, FIG. 5 is a front view of FIG. 4, FIG. 6 is a right side view of FIG. 4, and FIG. 7 is a cross-sectional view taken along line VII-VII ′ of FIG. . In addition, the same code | symbol is attached | subjected to the component same as FIG. 1 thru | or FIG.
4 to 7, reference numeral 20 denotes an aluminum pulley, which is used here in place of the pulley 2 of the rope traction device of FIG. Each of the left inner wall surface 21A and the right inner wall surface 21B of the V-shaped rope groove (V-shaped groove) 21 of the pulley 20 has a large number of left protrusions 22A and right protrusions 22B arranged radially in the circumferential direction. The projections are provided so as to be symmetrically opposed to each other with an interval in the left-right direction (axial direction). When the pulling rotation direction of the pulley 20 is the counterclockwise direction of FIG. 6, each pair of the left protruding portion 22A and the right protruding portion 22B facing each other is in the radial direction from the center of the pulley 20 (see reference A in FIG. 6). ), Is inclined slightly counterclockwise by θ, and the left protrusion 22A and the right protrusion 22B are easy to bite into the pulling rope 7 (the pulling rotation direction of the pulley 20 is shown in FIG. 6). The pair of opposing left protrusions 22A and right protrusions 22B are arranged so as to be slightly inclined clockwise by θ with respect to the radial direction from the center of the pulley 20).

左突起部２２Ａと右突起部２２Ｂは、断面がプーリ２０の左右方向（プーリ２０の軸方向）に見た中心に向けて凸な断面山形となっており、プーリ２０の内周側から外周側へバー状に延設されている。この実施例では対向する左突起部２２Ａと右突起部２２Ｂは、全部で１０対が設けられている。けん引ロープ７はロープ溝２１の中の左突起部２２Ａと右突起部２２Ｂの間に挿入するようにして、プーリ２０に巻き掛けることができる。 The left protruding portion 22A and the right protruding portion 22B have cross-sectional ridges that protrude toward the center when viewed in the left-right direction of the pulley 20 (the axial direction of the pulley 20), and from the inner peripheral side to the outer peripheral side of the pulley 20 It is extended in the shape of a bar. In this embodiment, a total of 10 pairs of the left protrusion 22A and the right protrusion 22B facing each other are provided. The tow rope 7 can be wound around the pulley 20 so as to be inserted between the left protrusion 22A and the right protrusion 22B in the rope groove 21.

ロープ溝２１の底部２３は、プーリ２０の軸方向に垂直な断面が略歯車（ラチェット歯車）状に形成されており（図６参照）、１０個の各歯の先端部が後述する外向き突起部（符号２２Ｃ）を成すようになっている。すなわち、ロープ溝２１の底部２３には、対向する各一対の左突起部２２Ａと右突起部２２Ｂに対応付けて、左突起部２２Ａの内周寄り端部と右突起部２２Ｂの内周寄り端部の間を軸方向に繋げるようにした外向き突起部２２Ｃが設けられている。外向き突起部２２Ｃは凸側が外周方向を向いており、ここでは、外向き突起部２２Ｃのプーリ軸に垂直な断面が、対応する一対の左突起部２２Ａと右突起部２２Ｂが内周側から外周側に延びた方向に向けて凸な山形となっている。 The bottom 23 of the rope groove 21 has a cross section perpendicular to the axial direction of the pulley 20 formed in a substantially gear (ratchet gear) shape (see FIG. 6). Part (reference numeral 22C). That is, the bottom 23 of the rope groove 21 is associated with each pair of the left protrusion 22A and the right protrusion 22B that face each other, and the end near the inner periphery of the left protrusion 22A and the end near the inner periphery of the right protrusion 22B. An outward projecting portion 22C is provided so as to connect the portions in the axial direction. The projecting side of the outward projecting portion 22C faces the outer peripheral direction, and here, the cross section perpendicular to the pulley axis of the outward projecting portion 22C is that the corresponding pair of left projecting portion 22A and right projecting portion 22B are from the inner peripheral side. It has a mountain shape that is convex in the direction extending to the outer peripheral side.

一対の左突起部２２Ａと右突起部２２Ｂ、及びこれらの左突起部２２Ａと右突起部２２Ｂの内周寄り端部間に設けた外向き突起部２２Ｃは、二股フォークまたは刺股状の形状を成し、ロープ溝２１に巻かれたけん引ロープ７の断面が略コ字状（または略Ｕ字状）に挟まれるようになっている。 The pair of left protrusions 22A and right protrusions 22B, and the outward protrusions 22C provided between the inner peripheral ends of the left protrusions 22A and right protrusions 22B have a bifurcated fork or piercing shape. And the cross section of the tow rope 7 wound around the rope groove 21 is sandwiched between substantially U-shapes (or substantially U-shapes).

次に、上記した実施例の作用を説明する。なお、プーリ２０が図１のロープけん引装置にプーリ２に代えて装着されているものとする。
ロープけん引装置を使用する場合、ロープ取り付け孔６に固定ロープ５の一端側を取り付け、他端側を柱等に固定しておく。また、一端側がけん引対象物に締結されたけん引ロープ７の他端側を入り口ロープガイド３、プーリ２０のロープ溝２１、出口ロープガイド４に巻きかけておく。プーリ２０に対してはロープ溝２１の中の左突起部２２Ａと右突起部２２Ｂの間にけん引ロープ７を挿入して巻き掛けるようにする。
プーリ２０の軸孔９に嵌着された回転軸８を図示しない減速機構を介して電動ドライバにより反時計方向に回転させると、けん引ロープ７がプーリ２０の周方向に沿って移動し、けん引対象物を装置側へけん引する。 Next, the operation of the above embodiment will be described. It is assumed that the pulley 20 is attached to the rope traction device in FIG. 1 instead of the pulley 2.
When the rope towing device is used, one end side of the fixed rope 5 is attached to the rope attachment hole 6 and the other end side is fixed to a pillar or the like. Further, the other end side of the tow rope 7 whose one end is fastened to the object to be pulled is wound around the entrance rope guide 3, the rope groove 21 of the pulley 20, and the exit rope guide 4. The pulling rope 7 is inserted and wound around the pulley 20 between the left protrusion 22A and the right protrusion 22B in the rope groove 21.
When the rotary shaft 8 fitted in the shaft hole 9 of the pulley 20 is rotated counterclockwise by an electric driver via a speed reduction mechanism (not shown), the tow rope 7 moves along the circumferential direction of the pulley 20 to be pulled. Towing an object to the equipment side.

プーリ２０に巻かれたけん引ロープ２０には、周方向の複数個所において、対向する一対の左突起部２２Ａと右突起部２２Ｂ、及びこれらの左突起部２２Ａと右突起部２２Ｂの内周寄り端部間に設けた外向き突起部２２Ｃとが、二股フォークまたは刺股状に食い込む。従って、けん引ロープ７が合成繊維ロープや麻ロープ等の天然繊維ロープであっても、滑り難くなる。 The pulling rope 20 wound around the pulley 20 has a pair of opposed left protrusions 22A and right protrusions 22B, and ends of the left protrusions 22A and right protrusions 22B near the inner periphery at a plurality of locations in the circumferential direction. The outward projecting portion 22C provided between the two parts bites into a bifurcated fork or a pierced crotch. Therefore, even if the tow rope 7 is a natural fiber rope such as a synthetic fiber rope or a hemp rope, it becomes difficult to slip.

けん引ロープ７に掛かる荷重が大きくなって、けん引ロープ７がプーリ２０の中心側に寄ろうとしたとき、周方向の複数個所で外向き突起部２２Ｃにけん引ロープ７が食い込み、中心側への移動が阻止される。従って、けん引ロープ７が一対の左突起部２２Ａと右突起部２２Ｂに強く狭圧されて傷む恐れがなくなる。また、プーリ２０の中心とプーリ２０に巻かれたけん引ロープ７の距離が短くならないので、電動ドライバの負荷が激増せず、けん引速度が遅くなり過ぎたり、けん引不能になったりする恐れもない。
けん引ロープ７に外向き突起部２２Ｃが食い込むことで、プーリ２０に対しけん引ロープ７が滑りにくくなる。とくに、外向き突起部２２Ｃが左突起部２２Ａ、右突起部２２Ｂの延設方向（プーリ２０の中心からの半径方向に対し、θだけ反時計方向へ傾斜した方向）に凸な山形となっているのでけん引ロープ７へ大きな力で食い込むことができる。
また、けん引ロープ７がプーリ２０の中心側に寄って左突起部２２Ａ、右突起部２２Ｂ間にけん引ロープ７が強く挟圧されることがないことから、出口側のけん引ロープ７が入口側に戻って巻き込まれてしまう事態も起きない。 When the load applied to the tow rope 7 increases and the tow rope 7 tries to approach the center side of the pulley 20, the tow rope 7 bites into the outward projecting portions 22C at a plurality of positions in the circumferential direction, and the movement toward the center side is performed. Be blocked. Therefore, there is no possibility that the tow rope 7 is strongly constricted by the pair of left protruding portion 22A and right protruding portion 22B and damaged. Further, since the distance between the center of the pulley 20 and the tow rope 7 wound around the pulley 20 is not shortened, the load on the electric driver does not increase drastically, and there is no fear that the towing speed becomes too slow or towable.
When the outward projection 22 C bites into the tow rope 7, the tow rope 7 is less likely to slip with respect to the pulley 20. In particular, the outward projecting portion 22C has a mountain shape that is convex in the extending direction of the left projecting portion 22A and the right projecting portion 22B (a direction that is inclined counterclockwise by θ with respect to the radial direction from the center of the pulley 20). Because it is, you can bite into the tow rope 7 with great force.
In addition, since the tow rope 7 is close to the center side of the pulley 20 and the tow rope 7 is not strongly pinched between the left protruding portion 22A and the right protruding portion 22B, the tow rope 7 on the outlet side is on the inlet side. There is no such thing as getting back and getting involved.

この実施例によれば、対向する各一対の左突起部２２Ａと右突起部２２Ｂに対応付けて、左突起部２２Ａの内周寄り端部と右突起部２２Ｂの内周寄り端部の間に凸側が外周方向を向いた外向き突起部２２Ｃを設け、一対の左突起部２２Ａと右突起部２２Ｂ及びこれらの内周寄り端部間に設けた外向き突起部２２Ｃとにより、ロープ溝２１に巻かれたけん引ロープ７の断面が略コ字状または略Ｕ字状に挟まれるようにしたことにより、プーリ２０に巻き掛けたけん引ロープ７に掛かる荷重が大きくなって、プーリ２０の中心寄りに移動しようとしても、外向き突起部２２Ｃに当接して邪魔されるので、プーリ２０の中心側に寄ることはなく、従って、けん引ロープ７が一対の左突起部２２Ａと右突起部２２Ｂに強く狭圧されて傷む恐れがなくなる。また、プーリ２０の中心とプーリ２０に巻かれたけん引ロープ７の距離が短くならないので、電動ドライバの負荷が激増せず、けん引速度が遅くなり過ぎたり、けん引不能になったりする恐れもない。
けん引ロープ７に外向き突起部２２Ｃが食い込むことで、プーリ２０に対しけん引ロープ７が滑りにくくなり、とくに、外向き突起部２２Ｃが左突起部２２Ａ、右突起部２２Ｂの延設方向（プーリ２０の中心からの半径方向に対し、θだけ反時計方向へ傾斜した方向）に凸な山形となっているのでけん引ロープ７へ大きな力で食い込むことができる。
また、けん引ロープ７がプーリ２０の中心側に寄って左突起部２２Ａ、右突起部２２Ｂ間にけん引ロープ７が強く挟圧されることがないことから、出口側のけん引ロープ７が入口側に戻って巻き込まれてしまう事態も起きない。 According to this embodiment, in correspondence with each pair of left protrusion 22A and right protrusion 22B facing each other, between the inner peripheral edge of the left protrusion 22A and the inner peripheral edge of the right protrusion 22B. An outward projecting portion 22C with the convex side facing the outer peripheral direction is provided, and the rope groove 21 is formed by a pair of left projecting portion 22A, right projecting portion 22B, and an outward projecting portion 22C provided between these inner peripheral end portions. Since the cross section of the wound tow rope 7 is sandwiched between a substantially U shape or a substantially U shape, the load applied to the tow rope 7 wound around the pulley 20 increases, and the pulley 20 is closer to the center. Even if it tries to move, it does not get close to the center side of the pulley 20 because it abuts against the outward protruding portion 22C, so the tow rope 7 is strongly narrowed between the pair of left protruding portion 22A and right protruding portion 22B. There is no fear of being damaged by being pressed . Further, since the distance between the center of the pulley 20 and the tow rope 7 wound around the pulley 20 is not shortened, the load on the electric driver does not increase drastically, and there is no fear that the towing speed becomes too slow or towable.
When the outward protrusion 22C bites into the pulling rope 7, the pulling rope 7 is less likely to slip with respect to the pulley 20. In particular, the outward protrusion 22C extends in the direction in which the left protrusion 22A and the right protrusion 22B extend (pulley 20). Since it has a mountain shape that is convex in the counterclockwise direction by θ with respect to the radial direction from the center, it can bite into the tow rope 7 with a large force.
In addition, since the tow rope 7 is close to the center side of the pulley 20 and the tow rope 7 is not strongly pinched between the left protruding portion 22A and the right protruding portion 22B, the tow rope 7 on the outlet side is on the inlet side. There is no such thing as getting back and getting involved.

なお、上記した実施例ではプーリはアルミ製としたが、本発明は何らこれに限定されず、鋼製など、他の種類の材質としても良い。
また、プーリは全体が一体物とした例を挙げて説明したが、図５のＶＩＩ−ＶＩＩ’線に沿って左右に半分ずつに分割した一対のプーリ半体（図８の符号２０Ａ、図９の２０Ｂ参照）をボルト等で一体化して構成しても良い。
また、一対の左突起部と右突起部、及びこれらの内周側端部間に設けた外向き突起部を、全部で１０組配設した場合を例に挙げて説明したが、９組以下或いは１１組以上配設するようにしても良い。
また、ロープけん引装置に用いるプーリを例に挙げて説明したが、登高器等、他の機器に用いるプーリに適用することもできる。 In the above-described embodiment, the pulley is made of aluminum, but the present invention is not limited to this, and other types of materials such as steel may be used.
Further, although the pulley has been described as an example in which the pulley is integrated as a whole, a pair of pulley halves (see reference numeral 20A in FIG. 8, FIG. 9) divided in half on the left and right along the line VII-VII ′ in FIG. 20B) may be integrated with a bolt or the like.
In addition, a case where a total of 10 pairs of left protrusions and right protrusions, and outward protrusions provided between the inner peripheral side ends are disposed has been described. Alternatively, 11 or more sets may be provided.
Moreover, although the pulley used for the rope towing apparatus has been described as an example, it can be applied to a pulley used for other equipment such as a climber.

本発明は、ロープけん引装置、登高器を初めとして各種機器に用いるプーリに適用可能である。 The present invention can be applied to pulleys used in various devices such as rope towing devices and climbers.

７けん引ロープ
２０プーリ
２１ロープ溝
２２Ａ左突起部
２２Ｂ右突起部
２２Ｃ外向き突起部 7 Towing rope 20 Pulley 21 Rope groove 22A Left protrusion 22B Right protrusion 22C Outward protrusion

Claims

A large number of left protrusions and right protrusions arranged radially in the circumferential direction on each of the opposing left and right inner wall surfaces of the rope groove protrude in a symmetrical manner with left and right spacing. In the pulley that is inserted and wrapped around the left protrusion and the right protrusion in the groove,
Each of the pair of left and right protrusions facing each other is formed in a convex cross-sectional mountain shape toward the center in the left-right direction of the pulley,
In correspondence with each pair of left and right protrusions facing each other, an outward protrusion with the convex side facing the outer peripheral direction between the inner peripheral edge of the left protrusion and the inner peripheral edge of the right protrusion Provided,
The cross section of the rope wound in the rope groove is substantially U-shaped by the pair of left and right protrusions and the outward protrusion provided between the left and right protrusions. Or that it is sandwiched between approximately U-shapes,
Pulley characterized by.

A large number of left protrusions and right protrusions arranged radially in the circumferential direction on each of the opposing left and right inner wall surfaces of the rope groove protrude in a symmetrical manner with left and right spacing. In the pulley that is inserted and wrapped around the left protrusion and the right protrusion in the groove,
In correspondence with each pair of left and right protrusions facing each other, an outward protrusion with the convex side facing the outer peripheral direction between the inner peripheral edge of the left protrusion and the inner peripheral edge of the right protrusion Provided,
The cross section of the rope wound in the rope groove is substantially U-shaped by the pair of left and right protrusions and the outward protrusion provided between the left and right protrusions. Or make it sandwiched in a substantially U shape,
Furthermore,
Each pair of the left protruding portion facing the right protrusions in the radial direction from the pulley center, and the kite provided obliquely in the same direction as the traction rotation direction of the pulley,
Features and to Help over Li a.

A large number of left protrusions and right protrusions arranged radially in the circumferential direction on each of the opposing left and right inner wall surfaces of the rope groove protrude in a symmetrical manner with left and right spacing. In the pulley that is inserted and wrapped around the left protrusion and the right protrusion in the groove,
In correspondence with each pair of left and right protrusions facing each other, an outward protrusion with the convex side facing the outer peripheral direction between the inner peripheral edge of the left protrusion and the inner peripheral edge of the right protrusion Provided,
The cross section of the rope wound in the rope groove is substantially U-shaped by the pair of left and right protrusions and the outward protrusion provided between the left and right protrusions. Or make it sandwiched in a substantially U shape,
The cross section perpendicular to the pulley axis of the outward protrusion is a mountain shape toward the direction in which the pair of left protrusion and right protrusion correspond to the outward protrusion,
Pulley characterized by.

The cross section of the outward protrusion perpendicular to the pulley axis is chevron-shaped toward the direction in which the pair of left protrusion and right protrusion correspond to the outward protrusion,
The pulley according to claim 1 or 2 .