JP5090961B2 - Belt mounting jig and belt mounting method - Google Patents

Belt mounting jig and belt mounting method Download PDF

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JP5090961B2
JP5090961B2 JP2008038912A JP2008038912A JP5090961B2 JP 5090961 B2 JP5090961 B2 JP 5090961B2 JP 2008038912 A JP2008038912 A JP 2008038912A JP 2008038912 A JP2008038912 A JP 2008038912A JP 5090961 B2 JP5090961 B2 JP 5090961B2
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pulley
belt
groove
mounting jig
belt mounting
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JP2009197864A (en
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敏史 深谷
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Gates Unitta Asia Co
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Description

本発明は、二段掛けプーリの奥側プーリに、周長方向に伸長可能なベルトを取り付けるためのベルト取付治具、及びベルト取付方法に関するものである。   The present invention relates to a belt attaching jig and a belt attaching method for attaching a belt that can be extended in the circumferential direction to a rear pulley of a two-stage pulley.

一般に、外周面にプーリ溝を有するプーリにベルトを掛巻してなるベルト伝動機構には、ベルトをプーリに取り付けてから所定のベルト張力を付与するように、テンションプーリなどの張力調整手段が設けられている。   Generally, a belt transmission mechanism in which a belt is wound around a pulley having a pulley groove on the outer peripheral surface is provided with tension adjusting means such as a tension pulley so that a predetermined belt tension is applied after the belt is attached to the pulley. It has been.

このような張力調整手段を不要にするため、プーリに取り付ける際に周方向に伸長させてプーリフランジを乗り越えさせるようにしたベルトが出現しており、さらに、特許文献１は、ベルトを周長方向に伸長させながら手前側プーリを乗り越えさせて二段掛けプーリのうちの奥側プーリに取り付けるためのベルト取付治具を開示している。   In order to eliminate the need for such tension adjusting means, a belt that has been extended in the circumferential direction so as to get over the pulley flange when attached to the pulley has emerged. A belt mounting jig is disclosed for extending over the front pulley while being extended to attach to the back pulley of the two-stage pulley.

図５に、特許文献１が開示するベルト取付治具を示す。ベルト取付治具１０１は、二段掛けプーリ１０３の手前側を通るベルト１０２を外周側に導入する導入部１０４と、導入部１０４から奥側プーリ１０５までベルト１０２を案内する差渡しガイド１０６とを備え、このベルト取付治具１０１よりもプーリ回転方向の後方のベルト１０２を奥側プーリ１０５に嵌めるようになっている。   FIG. 5 shows a belt mounting jig disclosed in Patent Document 1. The belt attachment jig 101 includes an introduction portion 104 that introduces the belt 102 that passes through the front side of the two-stage pulley 103 to the outer peripheral side, and a transfer guide 106 that guides the belt 102 from the introduction portion 104 to the back pulley 105. In addition, the rear belt 102 in the pulley rotation direction with respect to the belt mounting jig 101 is fitted into the rear pulley 105.

ベルト取付治具１０１を装着した二段掛けプーリ１０３を回転させることにより、ベルト１０２のうちの奥側プーリ１０５に嵌った範囲が徐々に広げられ、やがて、差渡しガイド１０６の表面を滑って奥側プーリ１０５に嵌まることにより、ベルト１０２の全体が奥側プーリ１０５に取り付けられる。
特開２００７−１２０６７８号公報（段落番号００２１、００３５〜００３６、図１） By rotating the two-stage pulley 103 to which the belt mounting jig 101 is attached, the range of the belt 102 fitted to the back pulley 105 is gradually expanded, and eventually the surface of the delivery guide 106 is slid to the back. The entire belt 102 is attached to the back pulley 105 by being fitted to the side pulley 105.
JP 2007-120678 A (paragraph numbers 0021, 0035 to 0036, FIG. 1)

ところが、特許文献１のベルト取付治具は、二段掛けプーリの手前側プーリと奥側プーリとが同径である場合に、その奥側プーリにベルトを取り付けるためのものであり、手前側プーリよりも大径の奥側プーリにベルトを取り付けることができない。   However, the belt attachment jig of Patent Document 1 is for attaching a belt to the rear pulley when the front pulley and the rear pulley of the two-stage hanging pulley have the same diameter. The belt cannot be attached to the rear-side pulley having a larger diameter.

本発明は、手前側プーリよりも大径の奥側プーリにベルトを取り付けることのできるベルト取付治具及びベルト取付方法の提供を目的とする。   An object of this invention is to provide the belt attachment jig | tool and belt attachment method which can attach a belt to the back side pulley larger diameter than a near side pulley.

上記目的を達成するために、本発明に係るベルト取付治具は、手前側プーリとこの手前側プーリよりも大径の奥側プーリとがプーリ軸の軸方向に並設されると共に、手前側プーリと奥側プーリとの境界にプーリフランジが設けられた二段掛けプーリのうち、奥側プーリのプーリ溝に周長方向に伸長可能なベルトを取り付けるためのものであり、手前側プーリに着脱自在とすると共に、奥側プーリのプーリ溝に取り付けたベルトが手前側に外れるのを阻止するための外れ止めを設けたものである。さらに、その外れ止めを、ベルト取付治具の装着状態で手前側プーリと奥側プーリとの境界のプーリフランジよりも半径方向外向きに突出する高さに設定したものである。 To achieve the above object, a belt attachment jig according to the present invention, than the front pulley and the front pulley and a back pulley of large diameter are arranged in parallel in the axial direction of the pulley shaft Rutotomoni, front Of two-stage pulleys with pulley flanges at the boundary between the pulley and the back pulley, this is for attaching a belt that can be extended in the circumferential direction to the pulley groove of the back pulley, and is attached to and detached from the front pulley In addition to being free, a slip-off preventing member is provided for preventing the belt attached to the pulley groove of the rear pulley from coming off to the near side. Further, the stopper is set to a height that protrudes outward in the radial direction from the pulley flange at the boundary between the front pulley and the rear pulley when the belt mounting jig is mounted.

上記構成によれば、ベルト取付治具を手前側プーリに装着し、その外れ止めによって、奥側プーリに取り付けたベルトが手前側に外れるのを阻止するので、少なくとも外れ止めの位置において、ベルトを奥側プーリに掛けた状態に保つことができる。しかも、ベルト取付治具を装着する二段掛けプーリは、その手前側プーリが奥側プーリよりも小径であり、ベルトの一部を小径の手前側プーリに掛けることにより、ベルトに張力を作用させることなく、ベルトの他の一部を大径の奥側プーリに掛けることができる。   According to the above configuration, the belt attachment jig is attached to the front pulley, and the belt attached to the back pulley is prevented from coming off by the slip-off prevention thereof. It can be kept on the back pulley. Moreover, the two-stage pulley on which the belt mounting jig is mounted has a front pulley with a smaller diameter than the rear pulley, and a tension is applied to the belt by hanging a part of the belt on the small front pulley. Without this, the other part of the belt can be hung on the large-diameter rear pulley.

これにより、ベルトに張力を作用させることなく、ベルト取付治具を境にして、プーリ回転方向前方でベルトを手前側プーリに掛けて、プーリ回転方向後方でベルトを奥側プーリに掛けることができる。さらに、この状態で、二段掛けプーリを回転させてベルト取付治具を前方に進めることにより、ベルトを伸長させながら、ベルトのうちの奥側プーリに掛けた範囲を徐々に広げて、ベルト全体を奥側プーリに取り付けることができる。   As a result, the belt can be hung on the front pulley in the front of the pulley rotation direction and the belt can be hung on the rear pulley in the rear of the pulley rotation direction without applying tension to the belt, with the belt mounting jig as a boundary. . Further, in this state, by rotating the two-stage pulley and advancing the belt mounting jig forward, while expanding the belt, gradually widen the range hung on the rear pulley of the belt, and the entire belt Can be attached to the rear pulley.

また、ベルト取付治具は、その底部を手前側プーリのプーリ溝に嵌めると共に、奥側プーリから境界のプーリフランジを跨いで手前側プーリに掛けたベルトで押さえることにより、手前側プーリに装着することもできる。   Also, the belt mounting jig is fitted to the front pulley by fitting the bottom of the belt fitting pulley into the pulley groove of the front pulley and pressing the belt with a belt that hangs on the front pulley across the boundary pulley flange from the rear pulley. You can also.

そうすれば、別の取付部を設けることなく、ベルト取付治具をプーリ溝に嵌めてベルトを掛けるだけで、手前側プーリにベルト取付治具を装着することができる。しかも、ベルトを手前側プーリからシフトさせて奥側プーリに取り付けた後は、ベルトによる押さえ付けが解除されるので、ベルト取付治具の取り外しも容易にすることができる。   By doing so, the belt attachment jig can be attached to the near-side pulley by simply fitting the belt attachment jig into the pulley groove and hooking the belt without providing a separate attachment portion. In addition, after the belt is shifted from the front pulley and attached to the rear pulley, pressing by the belt is released, so that the belt attaching jig can be easily removed.

プーリ回転方向における前端に、ベルトを手前側プーリのプーリ溝から奥側プーリのプーリ溝に案内する案内面を形成すれば、ベルトの極端な屈曲や擦れを生じることなく、スムーズにプーリフランジを乗り越えさせることができ、ベルトの損傷を防止することができる。   If a guide surface that guides the belt from the pulley groove of the front pulley to the pulley groove of the rear pulley is formed at the front end in the pulley rotation direction, the pulley flange can be smoothly overcome without causing excessive bending or rubbing of the belt. And damage to the belt can be prevented.

また、プーリ回転方向における後端に、外れ止めよりも半径方向外向きに突出する突起を形成することもできる。そうすれば、仮に、張力の作用するベルトが外れ止めを乗り越えることがあったとしても、そのベルトの外れを後端の突起で阻止することができるので、ベルトを取り付ける際の安全性を高めることができる。   In addition, a protrusion protruding outward in the radial direction with respect to the stopper can be formed at the rear end in the pulley rotation direction. Then, even if the belt on which tension is applied can get over the stopper, it is possible to prevent the belt from coming off with the protrusion at the rear end, so that the safety when attaching the belt is improved. Can do.

また、本発明は、手前側プーリとこの手前側プーリよりも大径の奥側プーリとがプーリ軸の軸方向に並設されると共に、手前側プーリと奥側プーリとの境界にプーリフランジが設けられた二段掛けプーリのうち、奥側プーリのプーリ溝に周長方向に伸長可能なベルトを取り付けるためのベルト取付方法を提供する。 Further, the present invention than the front pulley and the front pulley and a back pulley of large diameter are arranged in parallel in the axial direction of the pulley shaft Rutotomoni, the pulley flange on the boundary between the front pulley and the rear pulley of two-stage seat pulleys provided, to provide a belt mounting method for mounting a belt extendable to the pulley groove of the back side pulley circumference direction.

具体的には、まず、手前側プーリにベルト取付治具を装着し、このベルト取付治具よりもプーリ回転方向前方でベルトを手前側プーリに掛けると共に、手前側プーリと奥側プーリとの境界のプーリフランジを跨がせるようにして、ベルト取付治具よりもプーリ回転方向後方でベルトを奥側プーリに掛ける。次いで、二段掛けプーリを回転させながら、ベルトの全体を手前側プーリから奥側プーリにシフトさせる。   Specifically, first, a belt mounting jig is attached to the front pulley, and the belt is hung on the front pulley in front of the belt rotation direction than the belt mounting jig, and the boundary between the front pulley and the rear pulley is set. The belt is hung over the pulley on the back side in the pulley rotation direction behind the belt mounting jig. Next, the entire belt is shifted from the front pulley to the rear pulley while rotating the two-stage pulley.

このベルト取付方法の構成を採用すれば、上記の構成のベルト取付治具を使用することによる効果と同様の効果を得ることができる。   If the configuration of this belt mounting method is employed, the same effect as that obtained by using the belt mounting jig having the above configuration can be obtained.

以上のとおり、本発明によると、ベルト取付治具を二段掛けプーリのうちの手前側プーリに装着して、奥側プーリに取り付けたベルトが手前側に外れるのを阻止するようにしている。   As described above, according to the present invention, the belt attachment jig is attached to the front pulley of the two-stage pulleys so as to prevent the belt attached to the rear pulley from coming off to the front.

これにより、ベルト取付治具を境にして、プーリ回転方向前方でベルトを小径の手前側プーリに掛け、プーリ回転方向後方でベルトを大径の奥側プーリに掛けることができる。さらに、この状態で、二段掛けプーリを回転させることにより、ベルトを伸長させながら、ベルト全体を奥側プーリに取り付けることができる。   As a result, the belt can be hung on the small-diameter front pulley at the front of the pulley rotation direction, and the belt can be hung on the large-diameter back pulley at the rear of the pulley rotation direction, with the belt mounting jig as a boundary. Furthermore, by rotating the two-stage pulley in this state, the entire belt can be attached to the back pulley while the belt is extended.

以下、本発明に係るベルト取付治具及びベルト取付方法を実施するための最良の形態について、図面を用いて説明する。   The best mode for carrying out the belt mounting jig and the belt mounting method according to the present invention will be described below with reference to the drawings.

まず、ベルト取付治具の構成を説明する。図１は本発明に係るベルト取付治具の斜視図で、（ａ）は表面側から見た図を示し、（ｂ）は裏面側から見た図を示す。図２はプーリに装着したベルト取付治具の斜視図、図３はプーリに装着したベルト取付治具の正面図である。   First, the configuration of the belt mounting jig will be described. 1A and 1B are perspective views of a belt mounting jig according to the present invention, in which FIG. 1A shows a view seen from the front side, and FIG. 1B shows a view seen from the back side. FIG. 2 is a perspective view of a belt attachment jig attached to the pulley, and FIG. 3 is a front view of the belt attachment jig attached to the pulley.

ベルト取付治具１は、小径の手前側プーリ２ａ及び大径の奥側プーリ２ｂをプーリ軸方向に並設してなる二段掛けプーリ２のうち、奥側プーリ２ｂのプーリ溝３ｂに周長方向に伸長可能なベルト４を取り付けるためのものであり、手前側プーリ２ａに装着したベルト取付治具１を境にして、プーリ回転方向前方でベルト４を手前側プーリ２ａに掛け、プーリ回転方向後方でベルト４を奥側プーリ２ｂに掛けるようになっている。   The belt mounting jig 1 has a circumferential length in a pulley groove 3b of a back pulley 2b of a two-stage pulley 2 in which a small-diameter front pulley 2a and a large-diameter back pulley 2b are arranged side by side in the pulley axial direction. The belt 4 is attached to the front pulley 2a at the front of the pulley rotation direction with the belt mounting jig 1 attached to the front pulley 2a as a boundary. The belt 4 is hung on the back pulley 2b at the rear.

このベルト取付治具１は、手前側プーリ２ａのプーリ溝３ａに嵌まる底部５と、ベルト４が奥側プーリ２ｂから手前側に外れるのを阻止する外れ止め６と、ベルト４を手前側プーリ２ａのプーリ溝３ａから奥側プーリ２ｂのプーリ溝３ｂに案内する案内面７と、外れ止め６よりも半径方向外向きに突出する突起８とを備え、これらが例えば合成樹脂や金属で一体成形されている。   The belt mounting jig 1 includes a bottom portion 5 that fits in a pulley groove 3a of a front pulley 2a, a detachment stopper 6 that prevents the belt 4 from coming off the front pulley 2b, and a belt 4 that is connected to the front pulley 2a. The guide surface 7 that guides the pulley groove 3a of the rear pulley 2b from the pulley groove 3a of 2a and the protrusion 8 that protrudes outward in the radial direction from the stopper 6 are integrally formed of, for example, synthetic resin or metal. Has been.

底部５は、手前側プーリ２ａのプーリ溝３ａの溝底とほぼ同じ曲率に湾曲した板状とされ、プーリ溝３ａに嵌めて係止するよう、プーリ溝３ａの溝幅よりもわずかに小さな部材幅に設定される。この底部５をプーリ溝３ａに嵌めると共に、二段掛けプーリ２に掛けたベルト４で押さえてプーリ溝３ａからの浮き上がりを阻止することにより、ベルト取付治具１が手前側プーリ２ａに着脱自在に装着される。   The bottom 5 has a plate shape that is curved with substantially the same curvature as the bottom of the pulley groove 3a of the front pulley 2a, and is a member that is slightly smaller than the groove width of the pulley groove 3a so as to be fitted and locked in the pulley groove 3a. Set to width. The bottom 5 is fitted in the pulley groove 3a, and the belt mounting jig 1 is detachably attached to the front pulley 2a by holding it with the belt 4 hung on the two-stage pulley 2 to prevent the pulley from lifting up from the pulley groove 3a. Installed.

また、底部５は、手前側プーリ２ａから奥側プーリ２ｂに移行するベルト４の反力を受けるベルト取付治具１を安定して装着できるよう、例えば、プーリ溝３ａに嵌めた状態で手前側のプーリフランジ９ａの外縁と面一になる厚さ、かつ安定させるのに十分な長さに設定されている。   Further, the bottom portion 5 is, for example, the front side in a state where it is fitted in the pulley groove 3a so that the belt mounting jig 1 that receives the reaction force of the belt 4 moving from the near side pulley 2a to the far side pulley 2b can be stably mounted. The pulley flange 9a has a thickness that is flush with the outer edge of the pulley flange 9a and a length that is sufficient for stabilization.

なお、図１においては、底部５の底面を平坦面として図示しているが、底部５がプーリ溝３ａに十分に嵌合するよう、底部５の底面をプーリ溝３ａの溝形状に対応する形状に設定することもできる。例えば、ＶリブプーリにＶリブドベルトを取り付ける場合には、底部５の底面に、Ｖリブドベルトのリブ形状と同じリブ形状を形成すればよく、さらに、そのリブ形状は、底部５の全幅に形成してもよく、一つのリブ形状のみを形成するなど、底部５の一部に形成こともできる。これにより、ベルト取付治具１のプーリ軸方向の移動をより確実に規制して、ベルト取付治具１がプーリ軸方向に位置ずれするのを防止することができる。   In FIG. 1, the bottom surface of the bottom portion 5 is illustrated as a flat surface, but the bottom surface of the bottom portion 5 has a shape corresponding to the groove shape of the pulley groove 3 a so that the bottom portion 5 is sufficiently fitted into the pulley groove 3 a. Can also be set. For example, when a V-ribbed belt is attached to a V-rib pulley, the same rib shape as the rib shape of the V-ribbed belt may be formed on the bottom surface of the bottom portion 5, and the rib shape may be formed to the full width of the bottom portion 5. It is also possible to form a part of the bottom 5 such as forming only one rib shape. Thereby, the movement of the belt attachment jig 1 in the pulley axis direction can be more reliably regulated, and the belt attachment jig 1 can be prevented from being displaced in the pulley axis direction.

外れ止め６は、底部５のほぼ全長にわたって底部５の奥側半分から表面側に突出する断面略三角形とされ、ベルト取付治具１の装着状態で、手前側プーリ２ａと奥側プーリ２ｂとの境界のプーリフランジ９ｂよりも半径方向外向きに突出する高さに設定されている。   The stopper 6 has a substantially triangular cross-section projecting from the back half of the bottom portion 5 to the surface side over almost the entire length of the bottom portion 5, and when the belt mounting jig 1 is mounted, the front pulley 2 a and the back pulley 2 b The height is set so as to protrude outward in the radial direction from the boundary pulley flange 9b.

外れ止め６の頂部６ａは、プーリフランジ９ｂの奥側面まで達するようプーリフランジ９ｂの外縁を覆う形状に形成され、奥側プーリ２ｂのプーリ溝３ｂに掛けたベルト４が手前側に外れるのを阻止する。   The top portion 6a of the stopper 6 is formed to cover the outer edge of the pulley flange 9b so as to reach the back side surface of the pulley flange 9b, and prevents the belt 4 hung on the pulley groove 3b of the back pulley 2b from coming off to the near side. To do.

案内面７は、外れ止め６のプーリ回転方向前端部を前端側ほど薄くするテーパー状に設定してなり、手前側プーリ２ａのプーリ溝３ａに掛けたベルト４を滑らかに乗り上げさせて奥側プーリ２ｂのプーリ溝３ｂに案内する。この案内面７をこれに乗り上げたベルト４が押さえることにより、手前側プーリ２ａのプーリ溝３ａからのベルト取付治具１の浮き上がりが阻止される。   The guide surface 7 is set in a taper shape in which the front end portion of the pulley stopper 6 in the pulley rotation direction is made thinner toward the front end side, and the belt 4 hung on the pulley groove 3a of the front pulley 2a is smoothly ridden so that the rear pulley It guides to the pulley groove 3b of 2b. When the belt 4 riding on the guide surface 7 is pressed, the belt mounting jig 1 is prevented from being lifted from the pulley groove 3a of the front pulley 2a.

突起８は、底部５のプーリ回転方向後端部かつ奥側半分に、外れ止め６の後端部と連続して、かつ外れ止め６よりも表面側に突出して形成され、奥側から外れ止め６を乗り越えたベルト４の外れを規制する。   The protrusion 8 is formed at the rear end in the pulley rotation direction and at the back half of the bottom portion 5, continuously with the rear end portion of the locking stopper 6, and protruding to the surface side of the locking stopper 6, and prevents locking from the back side. The removal of the belt 4 over 6 is regulated.

次に、ベルト取付方法を説明する。図４はベルト取付方法を説明する図である。   Next, a belt attachment method will be described. FIG. 4 is a diagram for explaining a belt mounting method.

この方法は、二段掛けプーリ２の奥側プーリ２ｂのプーリ溝３ｂと、別プーリ１０のプーリ溝とに、ベルト４を取り付けるものである。ここで、二段掛けプーリ２は、共通のプーリに二本のベルトを掛巻するよう手前側プーリ２ａと奥側プーリ２ｂとをプーリ軸の軸方向に並設したものであり、その奥側プーリ２ｂが手前側プーリ２ａよりも大径に設定されている。   In this method, the belt 4 is attached to the pulley groove 3 b of the back pulley 2 b of the two-stage pulley 2 and the pulley groove of the separate pulley 10. Here, the two-stage pulley 2 has a front pulley 2a and a rear pulley 2b juxtaposed in the axial direction of the pulley shaft so that two belts are wound around a common pulley. The pulley 2b is set to have a larger diameter than the front pulley 2a.

また、ベルト４は、テンショナーなどの張力調整手段を不要にするよう、周長方向に伸長可能とされたものであり、例えばベルト本体にポリアミドからなる心線を埋設した構造とすることによって周長方向の伸び率を２〜３％に設定される。なお、ベルト４として、Ｖリブドベルトを例示することができるが、平ベルトなどのＶリブドベルト以外のベルトであってもよい。   The belt 4 can be extended in the circumferential direction so as not to require tension adjusting means such as a tensioner. For example, the belt 4 has a structure in which a core made of polyamide is embedded in the belt body. The elongation in the direction is set to 2-3%. The belt 4 may be a V-ribbed belt, but may be a belt other than a V-ribbed belt such as a flat belt.

ベルト取付方法を具体的に説明すると、まず、図４（ａ）に示すように、手前側プーリ２ａのプーリ溝３ａと別プーリ１０のプーリ溝にベルト４を掛巻する。このとき、手前側プーリ２ａが小径である分、ベルト４は緩やかに掛巻される。   The belt attaching method will be specifically described. First, as shown in FIG. 4A, the belt 4 is wound around the pulley groove 3a of the front pulley 2a and the pulley groove of the separate pulley 10. At this time, the belt 4 is gently wound as much as the front pulley 2a has a small diameter.

次いで、図４（ｂ）に示すように、手前側プーリ２ａのプーリ溝３ａにベルト取付治具１の底部５を嵌めると共に、ベルト取付治具１の前端の案内面７にベルト４を乗り上げさせて押さえることにより、手前側プーリ２ａにベルト取付治具１を装着する。   Next, as shown in FIG. 4B, the bottom portion 5 of the belt mounting jig 1 is fitted into the pulley groove 3a of the front pulley 2a, and the belt 4 is run on the guide surface 7 at the front end of the belt mounting jig 1. The belt attaching jig 1 is attached to the near-side pulley 2a.

さらに、ベルト４を案内面７に乗り上げさせながらベルト幅方向に曲げるようにして境界のプーリフランジ９ｂを跨がせ、このベルト４を奥側プーリ２ｂに移行させてプーリ溝３ｂに掛ける。このとき、外れ止め６で、奥側プーリ２ｂのプーリ溝３ｂに掛けたベルト４が手前側に外れるのを阻止する。   Further, the belt 4 is bent on the guide surface 7 while being bent in the belt width direction so as to straddle the boundary pulley flange 9b, and the belt 4 is transferred to the rear pulley 2b and is put on the pulley groove 3b. At this time, the detachment stop 6 prevents the belt 4 hung on the pulley groove 3b of the back pulley 2b from coming off to the near side.

これにより、ベルト取付治具１よりもプーリ回転方向前方でベルト４が手前側プーリ２ａに掛けられ、ベルト取付治具１よりもプーリ回転方向後方でベルト４が奥側プーリ２ｂに掛けられる。この状態ではベルト４に張力が作用しておらず、二段掛けプーリ２及び別プーリ１０に容易にベルト４を掛けることができる。   As a result, the belt 4 is hung on the front pulley 2a in front of the belt mounting jig 1 in the pulley rotation direction, and the belt 4 is hung on the back pulley 2b in the rear of the belt mounting jig 1 in the pulley rotation direction. In this state, no tension is applied to the belt 4, and the belt 4 can be easily hung on the two-stage pulley 2 and the other pulley 10.

図４（ｃ）に示すように、二段掛けプーリ２をそのセンターボルト１１に例えば市販の工具１２を装着して回転させる。これにより、ベルト４を伸長させながら、ベルト取付治具１がプーリ回転方向前方に進み、ベルト４のうち、奥側プーリ２ｂのプーリ溝３ｂに掛けられた範囲が広がっていく。   As shown in FIG. 4 (c), the two-stage pulley 2 is rotated by attaching a commercially available tool 12 to the center bolt 11, for example. As a result, while the belt 4 is extended, the belt mounting jig 1 advances forward in the pulley rotation direction, and the range of the belt 4 that is hung on the pulley groove 3b of the back pulley 2b is expanded.

このとき、張力の作用するベルト４が外れ止め６を乗り越えたとしても、プーリ回転方向の後端に形成した突起８がベルト４の外れを阻止するので、ベルト４を取り付ける際の安全性を高めることができる。なお、外れ止め６の手前側の面を傾斜面に形成しているので、二段掛けプーリ２をさらに回転させることにより、ベルト４を傾斜面に沿って押し上げて奥側プーリ２ｂのプーリ溝３ｂに取り付けることもできる。   At this time, even if the belt 4 acting on the tension passes over the stopper 6, the protrusion 8 formed at the rear end in the pulley rotation direction prevents the belt 4 from coming off, so that the safety when attaching the belt 4 is improved. be able to. Since the front side surface of the stopper 6 is formed as an inclined surface, the belt 4 is pushed up along the inclined surface by further rotating the two-stage pulley 2 and the pulley groove 3b of the back pulley 2b. It can also be attached to.

やがて、ベルト４の全体が手前側プーリ２ａから奥側プーリ２ｂにシフトし、図４（ｄ）に示すように、ベルト４による押さえが解除されたベルト取付治具１が手前側プーリ２ａから外れる。その後、工具１２を取り外すことにより、ベルト４の取り付けが完了する。   Eventually, the entire belt 4 shifts from the near side pulley 2a to the far side pulley 2b, and as shown in FIG. 4 (d), the belt mounting jig 1 released from pressing by the belt 4 is detached from the near side pulley 2a. . Thereafter, the attachment of the belt 4 is completed by removing the tool 12.

なお、本発明は、上記の実施の形態に限定されるものではなく、本発明の範囲内において、適宜変更を加えることができる。例えば、ベルト取付治具１に案内面７や突起８を必ずしも設ける必要はない。また、ベルト取付治具１をベルト４で押さえて装着する代わりに、ベルト取付治具１を手前側プーリ２ａに装着するための専用の取付部を設けることもできる。   In addition, this invention is not limited to said embodiment, A change can be suitably added within the scope of the present invention. For example, the guide surface 7 and the protrusion 8 are not necessarily provided on the belt mounting jig 1. Further, instead of pressing and attaching the belt attachment jig 1 with the belt 4, a dedicated attachment portion for attaching the belt attachment jig 1 to the front pulley 2a can be provided.

本発明に係るベルト取付治具の斜視図で、（ａ）は表面側から見た図を示し、（ｂ）は裏面側から見た図を示すBRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view of the belt attachment jig concerning this invention, (a) shows the figure seen from the surface side, (b) shows the figure seen from the back surface side. プーリに装着したベルト取付治具の斜視図Perspective view of belt mounting jig attached to pulley プーリに装着したベルト取付治具の正面図Front view of the belt mounting jig attached to the pulley ベルト取付方法を説明する図Diagram explaining how to attach the belt 従来のベルト取付治具を示す斜視図A perspective view showing a conventional belt mounting jig

符号の説明Explanation of symbols

１ ベルト取付治具
２ 二段掛けプーリ
２ａ 手前側プーリ
２ｂ 奥側プーリ
３ａ、３ｂ プーリ溝
４ ベルト
５ 底部
６ 外れ止め
６ａ 頂部
７ 案内面
８ 突起
９ａ、９ｂ プーリフランジ
１０ 別プーリ
１１ センターボルト
１２ 工具 DESCRIPTION OF SYMBOLS 1 Belt mounting jig 2 Two-stage pulley 2a Front side pulley 2b Back side pulley 3a, 3b Pulley groove 4 Belt 5 Bottom part 6 Detachment 6a Top part 7 Guide surface 8 Protrusion 9a, 9b Pulley flange 10 Separate pulley 11 Center bolt 12 Tool

Claims (5)

手前側プーリと該手前側プーリよりも大径の奥側プーリとがプーリ軸の軸方向に並設されると共に、手前側プーリと奥側プーリとの境界にプーリフランジが設けられた二段掛けプーリのうち、奥側プーリのプーリ溝に周長方向に伸長可能なベルトを取り付けるためのベルト取付治具であって、
手前側プーリに着脱自在とされ、奥側プーリのプーリ溝に取り付けたベルトが手前側に外れるのを阻止する外れ止めが設けられ、該外れ止めは、ベルト取付治具の装着状態で手前側プーリと奥側プーリとの境界のプーリフランジよりも半径方向外向きに突出する高さに設定されたことを特徴とするベルト取付治具。 Than the front side pulley and該手front pulley and a back pulley of large diameter are arranged in parallel in the axial direction of the pulley shaft Rutotomoni bunk hook pulley flange is provided at a boundary between the front side pulley and the rear pulley Among the pulleys, a belt mounting jig for mounting a belt that can be extended in the circumferential direction in the pulley groove of the rear pulley,
A detachable stopper that is detachably attached to the front pulley and prevents the belt attached to the pulley groove of the rear pulley from coming off to the front side is provided. A belt mounting jig characterized by being set to a height that protrudes outward in the radial direction from the pulley flange at the boundary between the rear pulley and the rear pulley. 手前側プーリのプーリ溝に底部を嵌めると共に、奥側プーリから境界のプーリフランジを跨いで手前側プーリに掛けた前記ベルトで押さえることにより、手前側プーリに装着されることを特徴とする請求項１に記載のベルト取付治具。   The bottom pulley is fitted into the pulley groove of the front pulley, and the belt is attached to the front pulley by pressing the belt on the front pulley across the boundary pulley flange from the back pulley. The belt mounting jig according to 1. プーリ回転方向における前端に、前記ベルトを手前側プーリのプーリ溝から奥側プーリのプーリ溝に案内する案内面が形成されたことを特徴とする請求項１又は２に記載のベルト取付治具。   The belt mounting jig according to claim 1 or 2, wherein a guide surface for guiding the belt from a pulley groove of a front pulley to a pulley groove of a back pulley is formed at a front end in a pulley rotation direction. プーリ回転方向における後端に、前記外れ止めよりも半径方向外向きに突出する突起が形成されたことを特徴とする請求項１、２又は３に記載のベルト取付治具。   The belt mounting jig according to claim 1, 2, or 3, wherein a protrusion protruding outward in the radial direction from the stopper is formed at a rear end in a pulley rotation direction. 手前側プーリと該手前側プーリよりも大径の奥側プーリとがプーリ軸の軸方向に並設されると共に、手前側プーリと奥側プーリとの境界にプーリフランジが設けられた二段掛けプーリのうち、奥側プーリのプーリ溝に周長方向に伸長可能なベルトを取り付けるためのベルト取付方法であって、
手前側プーリにベルト取付治具を装着し、該ベルト取付治具よりもプーリ回転方向前方で前記ベルトを手前側プーリに掛けると共に、手前側プーリと奥側プーリとの境界のプーリフランジを跨がせるようにして、ベルト取付治具よりもプーリ回転方向後方で前記ベルトを奥側プーリに掛け、二段掛けプーリを回転させながら、ベルトの全体を手前側プーリから奥側プーリにシフトさせることを特徴とするベルト取付方法。 Than the front side pulley and該手front pulley and a back pulley of large diameter are arranged in parallel in the axial direction of the pulley shaft Rutotomoni bunk hook pulley flange is provided at a boundary between the front side pulley and the rear pulley Among the pulleys, a belt mounting method for mounting a belt that can extend in the circumferential direction in the pulley groove of the back pulley,
A belt attachment jig is attached to the front pulley, and the belt is hung on the front pulley in front of the belt rotation direction with respect to the belt attachment jig, and straddles the pulley flange at the boundary between the front pulley and the rear pulley. Hang the belt on the back pulley behind the belt mounting jig and rotate the two-stage pulley while shifting the entire belt from the front pulley to the back pulley. A characteristic belt mounting method.
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