WO2018198546A1

WO2018198546A1 - One-way clutch for pulley, pulley equipped with same, and flat belt transmission system equipped with same

Info

Publication number: WO2018198546A1
Application number: PCT/JP2018/008887
Authority: WO
Inventors: 宮田　博文; 秀星田中
Original assignee: バンドー化学株式会社
Priority date: 2017-04-27
Filing date: 2018-03-08
Publication date: 2018-11-01
Also published as: CN110546404A; JPWO2018198546A1; JP6412293B1

Abstract

A one-way clutch (10) for a pulley that allows the pulley to rotate only in the forward direction, said one-way clutch for a pulley being attached to a side surface of a serpentine control pulley (5). Specifically, the one-way clutch (10) for a pulley is provided with a guide plate (11) attached to the side surface of the serpentine control pulley (5). This guide plate (11) is provided with reverse rotation prevention members (13), which prevent reverse rotation with respect to the pulley shaft (7) rotatably supporting the serpentine control pulley (5), and guide grooves (12), which house the reverse rotation prevention members (13) and guide the motion of the reverse rotation prevention members (13) between a reverse rotation prevention position that prevents reverse rotation of the serpentine control pulley (5) and a forward-rotation-allowing position that allows forward rotation of the serpentine control pulley (5).

Description

One-way clutch for pulley, pulley provided with the same, and flat belt transmission system provided with the same

The present invention relates to a one-way clutch for a pulley that is attached to a pulley and allows the pulley to rotate only in the forward direction (hereinafter referred to as forward rotation), a pulley having the pulley, and a flat belt transmission system having the pulley.

Conventionally, in a transmission system using a flat belt, the flat belt may meander while the vehicle is running, or may move slightly toward the one side of the pulley. This is because the flat belt is more sensitive to the displacement of the pulley shaft from the normal position, the deflection of the pulley shaft due to the change of the shaft load, the pulley sway, and the like than the other transmission belts. In order to prevent such meandering and offset running, a flat belt meandering control device for preventing meandering of a flat belt is known (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 2005-121205

By the way, in a flat belt transmission system having a fan such as a blower, the fan may rotate in the reverse direction (hereinafter referred to as reverse rotation) due to wind or the like. In such a case, as described above, the flat belt is easily displaced from the pulley, and when it is reversed, the flat belt moves in a meandering direction, the flat belt contacts the flange of the pulley, and the belt side surface is damaged. In some cases, the flat belt may run on the flange and fall off the pulley.

Conventionally, there is a known one-way clutch with a bearing or the like inside the pulley. However, especially in the case of rotational fluctuation, the one-way clutch itself becomes large so that it can cope with the rotational fluctuation. There is also a problem that it tends to be attached and is not easy to install.

Further, as in the conventional flat belt transmission system 101 shown in FIGS. 7A and 7B, for example, an external one-way clutch 105 is attached to the side surface of the driven pulley 102 and fixed to the fixing portion 108 by the wire 107 using the eye bolt 107a. is doing. 7A to 8B, the forward direction is indicated by an arrow F, and the reverse direction is indicated by an arrow R. During forward rotation, as shown in FIG. 8A, the ball 105a does not hinder the rotation of the driven pulley 102. On the other hand, at the time of reverse rotation, as shown in FIG. 8B, the ball 105a is engaged with the wedge portion 105b, and the external one-way clutch 105 is rotated and integrated with the rotating shaft 102a of the driven pulley 102. As a result, as shown in FIG. 7B, the wire 107 is pulled, and the driving of the flat belt 106 in the reverse direction R is prevented. In such a configuration, a space for placing the wire 107 is required, and the number of parts increases and the mass also increases. Further, the portion for fixing the eyebolt 107a needs a certain level of strength.

The wire 107 is slightly pulled in the rotational direction by the sliding resistance of the external one-way clutch 105 even during the forward rotation shown in FIGS. 7A and 8A. Since the ball 105a in the external one-way clutch 105 is always pushed by the spring 105c, the ball 105a is in contact with the internal part, and sliding resistance is generated. This also causes transmission loss.

On the other hand, as shown in FIGS. 7B and 8B, during reverse rotation, the external one-way clutch 105 is operated, the wire 107 is stretched, and the rotation of the driven pulley 102 is stopped. However, since the slack and tension of the wire 107 change in the forward and reverse directions, the wire 107 may flutter and damage surrounding equipment. At the moment when the reverse rotation stops, the wire 107 receives an impact load due to the moment of inertia of the rotation of the driven pulley 102. This also reduces the life of the wire 107, and also generates an impact sound, which causes a harmful effect of noise.

In order to avoid this, a method of stretching the wire 107 so as not to loosen is conceivable. However, as can be seen from the calculation formula of the slack f formula f = wL ² / 8H (H: horizontal tension kgf, w: unit length mass kg / m, f: slack m, L: horizontal distance m), f is In the case of 0, since the horizontal tension H is infinite, it is impossible to prevent the wire 107 from slackening in this state. For this reason, such an adverse effect caused by the external one-way clutch 105 is unavoidable.

The present invention has been made in view of such a point, and an object of the present invention is to make it possible to reliably prevent reverse rotation of the pulley with a simple structure.

In order to achieve the above object, in the present invention, a pulley one-way clutch is attached to the side surface of the pulley so that the reverse rotation of the pulley can be prevented.

More specifically, the one-way clutch for pulleys of the first invention is attached to the side surface of the pulley and allows the pulley to rotate only in the forward direction.

According to the above configuration, the pulley can be prevented from rotating in the reverse direction only by being attached to the side surface of the pulley. Since it only needs to be attached to the side surface of the pulley, the attachment is easy and the structure is simple, and in some cases, the pulley can be attached to an existing pulley. In addition, the space can be saved, the number of parts is small, and the weight can be reduced.

In the second invention, in the first invention,
A guide plate attached to the side surface of the pulley;
A reverse rotation preventing member that is provided on the guide plate and prevents reverse rotation with respect to a pulley shaft that rotatably supports the pulley;
A guide groove that accommodates the reverse blocking member and guides the movement of the reverse blocking member between a reverse rotation preventing position that prevents the pulley from rotating reversely and a forward rotation allowable position that allows the pulley to rotate forward. ing.

According to the above configuration, the reverse rotation prevention member moves in the guide groove between the reverse rotation prevention position and the forward rotation allowable position, and when the reverse rotation prevention position is in the reverse rotation prevention position, the reverse rotation of the pulley is prevented, and when in the forward rotation permission position, the pulley Allows normal rotation. Since the guide plate and the reverse rotation prevention member may be attached to the pulley, the attachment is easy and the structure is simple, and in some cases, the guide plate and the reverse rotation prevention member can be attached to an existing pulley.

In the third invention, in the second invention,
In the guide groove, the forward rotation allowable position is disposed in a direction away from the pulley shaft, and the reverse rotation prevention position is disposed in a direction approaching the pulley shaft,
At the reverse rotation prevention position, the reverse rotation prevention member is configured to be engaged between the outer peripheral surface of the pulley shaft and the inner peripheral surface of the guide groove to prevent reverse rotation of the pulley.

According to the above configuration, the reverse rotation preventive member is engaged between the outer periphery of the pulley shaft and the inner surface of the guide groove, and acts as a wedge to reliably prevent the pulley from reversing.

In the fourth invention, in the third invention,
The reverse rotation prevention member moves to the forward rotation allowable position side by rotation of the pulley when the pulley rotates forward, and prevents reverse rotation of the pulley at the reverse rotation prevention position when the pulley attempts to reverse rotation. It is configured.

According to the above configuration, when the pulley is about to rotate forward, the reverse rotation prevention member moves to the forward rotation allowable position that is not the reverse rotation prevention position, and the pulley is rotated. When the pulley is about to rotate in a non-rotatable direction, the reverse rotation prevention member stays at the reverse rotation prevention position to reliably prevent the pulley from rotating.

In a fifth invention, in any one of the second to fourth inventions,
The reverse rotation preventing member includes a magnetic body,
The guide plate and the guide groove are not magnetic materials,
A magnet for attracting the reverse rotation prevention member to the reverse rotation prevention position is provided at the end of the guide groove on the reverse rotation prevention position side.

According to the above configuration, the reverse rotation preventing member, which is a magnetic material, is reliably attracted to the magnet without being affected by the guide plate and the guide groove that are not magnetic materials. Since it is attracted by a magnet, it is not necessary to move the reverse rotation prevention member to the reverse rotation prevention position with a spring or the like that easily generates vibration.

In a sixth invention, in the fifth invention,
The reverse rotation prevention member is disc-shaped and can move between the forward rotation allowable position and the reverse rotation prevention position by rotating in the guide groove, and is not in contact with the pulley shaft by centrifugal force during forward rotation. It is comprised so that it may become.

According to the above configuration, the rotation prevention member does not hinder the rotation of the pulley other than the rotation prevention position because the rotation prevention member itself rotates and moves to a position where it does not contact the pulley shaft by centrifugal force and sticks to the guide groove. Moreover, since the reverse rotation preventing member does not contact the pulley shaft during normal rotation, it is not necessary to supply grease or the like.

In a seventh invention, in any one of the second to sixth inventions,
The guide groove is covered with a cover plate to constitute a unit.

According to the above configuration, by covering the guide groove with the cover plate and configuring the unit, the mounting becomes extremely easy and the mounting to the existing pulley becomes easy.

The eighth pulley includes the one-way clutch for pulleys according to any one of the first to seventh inventions.

According to the above configuration, a pulley that rotates reliably in only one direction can be obtained with a simple configuration.

A ninth flat belt transmission system includes the pulley of the eighth invention,
The pulley shaft;
A flat belt hung on the pulley.

According to the above configuration, since the flat belt is prevented from being driven in the reverse direction, the flat belt is reliably prevented from falling off due to the reverse rotation.

In a tenth aspect, in the ninth aspect,
The pulley is a meander control pulley that controls meandering of the flat belt,
The meander control pulley is configured to prevent the flat belt from being driven in the reverse direction.

According to the above configuration, the meandering control pulley not only reliably prevents the meandering of the flat belt in the forward direction, but also prevents the flat belt from falling off by preventing the drive in the reverse direction. .

In an eleventh aspect, in the tenth aspect,
Used for blowers without rotational fluctuation.

According to the above configuration, if the blower has no rotational fluctuation, there is no pulsation like the engine, and the one-way clutch functions reliably. Here, “no rotation fluctuation” means that there may be some fluctuation as well as no rotation fluctuation.

In a twelfth invention, in any one of the ninth to eleventh inventions,
When the flat belt is driven in the reverse direction with a force equal to or greater than a predetermined tension, the flat belt is configured to slip.

According to the above configuration, even if the rotational torque of the reverse rotation is large and the rotational torque exceeds the rotation blocking ability of the pulley one-way clutch, the flat belt slips, preventing the pulley one-way clutch from being destroyed or damaged. The flat belt can be prevented from falling off.

As described above, according to the present invention, the pulley can be rotated only in the forward direction only by being attached to the side surface of the pulley. And dropout can be prevented. In addition, a flat belt transmission system that is space-saving, has a small number of parts, and is lightweight can be obtained. Furthermore, a pulley one-way clutch can be attached to an existing pulley.

It is a front view which shows the one-way clutch for pulleys and its periphery which abbreviate | omitted the cover plate. It is a perspective view which shows the meandering control apparatus with which the one-way clutch for pulleys was attached. FIG. 3 is a sectional view taken along line III-III in FIG. 1. FIG. 2 is a view corresponding to FIG. 1 when the reverse rotation preventing member is in a reverse rotation preventing position. It is a front view which expands and shows a guide groove, a reverse rotation prevention member, and its periphery. It is a front view which shows a flat belt transmission system. It is a front view which shows the driven pulley part at the time of the normal rotation of the flat belt transmission system concerning a prior art. It is a front view which shows the driven pulley part at the time of reverse rotation of the flat belt transmission system concerning a prior art. It is a front view which partially enlarges and shows the time of forward rotation of the external one-way clutch concerning a prior art. It is a front view which partially enlarges and shows the time of reverse rotation of the external one-way clutch concerning a prior art.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 shows a meandering control device 4 having a meandering control pulley 5 as a pulley, to which a pulley one-way clutch 10 according to an embodiment of the present invention is attached. This meandering control device 4 is attached to a flat belt transmission system 1 as shown in FIG. 6, for example. In each figure, the forward direction is indicated by an arrow F, and the reverse direction is indicated by an arrow R.

Although not shown in detail, this flat belt transmission system 1 is used as a drive system for a blower, for example, and is a drive pulley 2 driven by an actuator such as an electric motor, and a driven pulley 3 connected to a rotating shaft of a fan of the blower. And a flat belt 6 hung on the meandering control pulley 5. The flat belt transmission system 1 is not limited to a blower but is also used for an air conditioner, a compressor, and the like. In particular, unlike belt transmission systems attached to the output shaft of an engine, those that have little or no rotational fluctuation are targeted. The flat belt 6 has a structure in which, for example, a core wire is provided at the center in the thickness direction, and the core wire is sandwiched between an upper rubber and a bottom rubber. However, the type of the flat belt 6 is not particularly limited, and the material and the like are not particularly limited.

As shown in FIG. 2, the meandering control device 4 includes a base portion 4a attached to a blower or the like, and a tension arm 4c that is swingably supported by an arm support shaft 4b at one end of the base portion 4a. A pulley shaft 7 that rotatably supports the meandering control pulley 5 is provided on the tension arm 4c. As shown also in FIG. 3, a collar 8 is fitted on the outer periphery of the pulley shaft 7 so as to rotate integrally. The collar 8 may be integral with the pulley shaft 7. The collar 8 is provided with a dust cap 8a (not shown in FIGS. 1 and 4). The meandering control pulley 5 is rotatably supported by the collar 8 via a bearing 9. The tension arm 4c is urged with a predetermined tensile force by a tension spring 4d provided on the other end side of the base portion 4a. By this meandering control device 4, the running position of the flat belt 6 is autonomously controlled, and the application of tension is stably maintained by the tension spring 4d. Therefore, the life of the flat belt 6 can be extended and maintenance-free can be achieved.

As a feature of the present invention, as shown in FIGS. 1 and 3, the meandering control pulley 5 is configured to prevent the flat belt from being driven in one direction (reverse direction R). That is, a pulley one-way clutch 10 that allows the meandering control pulley 5 to rotate only in the forward direction F is attached to the side surface of the meandering control pulley 5. The pulley one-way clutch 10 includes a guide plate 11 attached to a side surface of the meandering control pulley 5. The guide plate 11 is made of a nonmagnetic material, and is made of, for example, a stainless steel SUS304 disc. The guide plate 11 is not limited to SUS304 as long as it has high rigidity and is non-magnetic. The guide plate 11 has a through hole 11a through which the pulley shaft 7 is inserted in the center, and includes, for example, three guide grooves 12. The guide groove 12 accommodates a reverse rotation preventing member 13 that prevents reverse rotation with respect to the pulley shaft 7 that rotatably supports the meandering control pulley 5. The reverse rotation preventing member 13 is made of, for example, a circular steel plate. Note that the number of the guide grooves 12 may be less than 3, or 4 or more. The guide groove 12 has a reverse rotation preventing position B (shown in FIG. 4) for preventing the reverse movement of the meandering control pulley 5 from the movement of the reverse rotation preventing member 13 and a forward rotation allowable position A (for allowing the normal rotation of the meandering control pulley 5). (Shown in FIG. 1). The disc-shaped reverse rotation preventing member 13 is configured to be able to move between the forward rotation allowable position A and the reverse rotation prevention position B by rotating in the guide groove 12.

One end side of the guide groove 12 extends in a direction away from the contact point with the outer peripheral surface of the collar 8, the other end side extends to the opposite side, and the reverse rotation prevention member 13 is sucked to the reverse rotation prevention position B at the end point. A magnet 16 is provided. When the meandering control pulley 5 rotates in the forward direction F, the magnetic force of the magnet 16 is set so as not to hinder the movement of the reverse rotation preventing member 13 to the forward rotation allowable position A. In addition, since it is attracted by the magnet 16, it is not necessary to draw the reverse rotation preventing member 13 to the reverse rotation preventing position B with a spring or the like. For this reason, vibration caused by a spring or the like does not occur.

In other words, as shown in FIG. 1, when the meandering control pulley 5 rotates in the forward direction F, the reverse rotation preventing member 13 is rotated by the rotation of the meandering control pulley 5 so that the reverse rotation preventing member 13 is rotated to the normal rotation allowable position A side. As shown in FIG. 4, when the meandering control pulley 5 tries to rotate in the reverse direction R, the meandering control pulley 5 stays at the reverse rotation preventing position B and acts like a wedge so as to prevent the meandering control pulley 5 from reversing. It is configured.

2 and 3, the outer side of the guide groove 12 is covered with a disk-shaped outer cover plate 14 having substantially the same outer diameter and inner diameter as the guide plate 11. The outer cover plate 14 is also made of a nonmagnetic material, for example, SUS304. In the present embodiment, the inner side of the guide plate 11 is also covered by the inner cover plate 15. The inner cover plate 15 is also made of a nonmagnetic material, for example, SUS304. For example, when the guide groove 12 is provided through the guide plate 11, the inner cover plate 15 is required. However, for example, when the bottom surface of the guide groove 12 is formed on the guide plate 11 by cutting, The cover plate 15 is not necessary. In the present embodiment, the guide groove 12 and the reverse rotation preventing member 13 are provided in the guide plate 11, the guide plate 11 is sandwiched between the outer cover plate 14 and the inner cover plate 15, and fixed by the spring pin 17, thereby It is configurable. This unit-configured pulley one-way clutch 10 can be attached to the meandering control pulley 5 simply by fastening the fixing bolt 18 to the screw hole 5 a provided in the meandering control pulley 5. For this reason, the meandering control pulley 5 only needs to be provided with a screw hole 5a, and therefore, the pulley one-way clutch 10 can be attached to the existing meandering control pulley 5.

In the guide groove 12, as shown in an enlarged view in FIG. 5, the forward rotation allowable position A is disposed in a direction away from the pulley shaft 7, and the reverse rotation prevention position B is disposed in a direction approaching the pulley shaft 7. The distance between the outer peripheral surface of the collar 8 and the inner peripheral surface of the guide groove 12 at the forward rotation allowable position A indicated by a two-dot chain line is L1. Since the forward rotation allowable position A is other than the reverse rotation prevention position B, the magnitude of L1 varies. The distance L2 between the reverse rotation preventing member 13 at the reverse rotation preventing position B shown in FIG. 4 and the outer peripheral surface of the pulley shaft 7 and the inner peripheral surface of the guide groove 12 is smaller than L1 (L2 <L1). Therefore, at this position, the reverse rotation preventing member 13 is configured to be engaged between the outer periphery of the pulley shaft 7 and the inner surface of the guide groove 12 to prevent the meandering control pulley 5 from rotating backward.

Next, the operation of the pulley one-way clutch 10 according to this embodiment will be described.

First, as shown in FIGS. 2 and 4, when the belt transmission system 1 is stopped, the reverse rotation prevention member 13 is at the reverse rotation prevention position B by the magnetic force of the magnet 16. At this time, the reverse rotation preventing member 13 is engaged between the outer periphery of the pulley shaft 7 and the inner surface of the guide groove 12 to exert a wedge-like action and reliably prevent the meandering control pulley 5 from reversely rotating. . That is, when the fan of the blower tries to reversely rotate by receiving wind or the like, the reverse rotation prevention member 13 is in the reverse rotation prevention position B to reliably prevent reverse rotation of the meandering control pulley 5. In this embodiment, the non-magnetic guide plate 11, the outer cover plate 14, the inner cover plate 15, and the guide groove 12 are not affected by the non-magnetic guide plate 11, and the reverse rotation preventing member 13 that is a magnetic material is reliably attracted to the magnet 16. .

On the other hand, when the meandering control pulley 5 tries to rotate forward, such as when the blower is operating, the reverse rotation preventing member 13 rotates and moves to the forward rotation allowable position A that is not the reverse rotation preventing position B. Other than the reverse rotation prevention position B, the reverse rotation prevention member 13 itself rotates to move to a position where it does not contact the pulley shaft 7 (collar 8) by centrifugal force and sticks to the guide groove 12, so that the meandering control pulley 5 rotates. Does not interfere. For this reason, normal rotation of the meandering control pulley 5 is performed as usual. Further, during forward rotation, the reverse rotation preventing member 13 does not contact the pulley shaft 7 (collar 8), so that it is not necessary to supply grease or the like.

In this way, the reverse rotation prevention member 13 moves between the reverse rotation prevention position B and the forward rotation allowable position A in the guide groove 12, and when the reverse rotation prevention position B is in the reverse rotation prevention position B, the reverse rotation of the meandering control pulley 5 is prevented. When in the allowable position A, the meandering control pulley 5 is allowed to rotate forward.

In this embodiment, it is not necessary to embed a one-way clutch inside, and the guide groove 12 and the reverse rotation preventing member 13 are provided in the guide plate 11, and the guide plate 11 is provided with the outer cover plate 14 and the inner cover plate 15. And is attached to the meandering control pulley 5 with bolts or the like, so that the attachment is extremely easy and the structure is simple.

In the present embodiment, the meandering control pulley 5 not only reliably prevents the flat belt 6 from meandering in the forward direction F, but also prevents the flat belt 6 from falling off by preventing driving in the reverse direction R. It is surely prevented.

As in this embodiment, if the blower has no rotational fluctuation, the pulley one-way clutch 10 functions reliably without pulsation like the engine.

Therefore, according to the pulley one-way clutch 10 according to the present embodiment, the guide groove 12 of the guide plate 11 accommodates the reverse rotation preventing member 13 for preventing the reverse rotation with respect to the pulley shaft 7 and prevents the reverse rotation of the meandering control pulley 5. By moving between the position B and the forward rotation allowable position A that allows forward rotation of the meandering control pulley 5, the reverse rotation of the meandering control pulley 5 can be reliably prevented with a simple structure. In addition, the meandering control pulley 5 that reliably rotates only in one direction can be obtained with a simple configuration. Furthermore, in this embodiment, the flat belt transmission system 1 having a space-saving, small number of parts, and lightweight configuration that can reliably prevent the flat belt 6 from falling off due to reverse rotation can be obtained.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

That is, in the above embodiment, the example in which the pulley one-way clutch 10 is attached to the meandering control pulley 5 has been described. However, the pulley to be attached is not limited to the use of the meandering control, and is not particularly limited as long as it is a pulley for a flat belt. Not. The pulley one-way clutch 10 of the present invention is particularly suitable for the flat belt transmission system 1 having no rotational fluctuation, but can also be applied to cases where there is a slight rotational fluctuation.

Further, when the flat belt 6 is driven in the reverse direction R with a force equal to or greater than a predetermined tension, the flat belt 6 may be configured to slip. That is, even when the reverse rotation torque is large and the rotation torque exceeds the rotation blocking ability of the pulley one-way clutch 10, the flat belt 6 slips, preventing the pulley one-way clutch 10 from being destroyed or damaged. The flat belt 6 can be prevented from falling off.

In the above embodiment, the collar 8 is fitted to the outer periphery of the pulley shaft 7 so as to rotate integrally, and the reverse rotation preventing member 13 is brought into contact with the collar 8. However, the collar 8 is not provided but directly brought into contact with the pulley shaft 7. May be.

In addition, the above embodiment is an essentially preferable example, and is not intended to limit the scope of the present invention, its application, and use.

DESCRIPTION OF SYMBOLS 1 Flat belt transmission system 2 Drive pulley 3 Driven pulley 4 Meander control device 4a Base part 4b Arm support shaft

4c Tension arm

4d Tension spring 5 Meander control pulley (pulley)
6 Flat belt 7 Pulley shaft 8 Collar (pulley shaft)
9 Bearing 10 One-way clutch for pulley 11 Guide plate 12 Guide groove 13 Reverse rotation prevention member 13a Steel ball 14 Outer cover plate 15 Inner cover plate 16 Magnet 17 Spring pin 18 Fixing bolt

Claims

A one-way clutch for a pulley, which is attached to a side surface of a pulley and allows the pulley to rotate only in a positive direction.
In the one-way clutch for pulleys according to claim 1,
A guide plate attached to the side surface of the pulley;
A reverse rotation preventing member that is provided on the guide plate and prevents reverse rotation with respect to a pulley shaft that rotatably supports the pulley;
A guide groove that accommodates the reverse blocking member and guides the movement of the reverse blocking member between a reverse rotation preventing position that prevents the pulley from rotating reversely and a forward rotation allowable position that allows the pulley to rotate forward. One-way clutch for pulleys characterized by
The one-way clutch for pulleys according to claim 2,
In the guide groove, the forward rotation allowable position is disposed in a direction away from the pulley shaft, and the reverse rotation prevention position is disposed in a direction approaching the pulley shaft,
In the reverse rotation preventing position, the reverse rotation preventing member is configured to be engaged between an outer peripheral surface of the pulley shaft and an inner peripheral surface of the guide groove so as to prevent the reverse rotation of the pulley. One-way clutch for pulley.
In the one-way clutch for pulleys according to claim 3,
The reverse rotation prevention member moves to the forward rotation allowable position side by rotation of the pulley when the pulley rotates forward, and prevents reverse rotation of the pulley at the reverse rotation prevention position when the pulley attempts to reverse rotation. A one-way clutch for pulleys, characterized in that it is configured as follows.
In the one-way clutch for pulleys as described in any one of Claim 2 to 4,
The reverse rotation preventing member includes a magnetic body,
The guide plate and the guide groove are not magnetic materials,
A pulley one-way clutch, characterized in that a magnet for attracting the reverse rotation prevention member to the reverse rotation prevention position is provided at an end of the guide groove on the reverse rotation prevention position side.
The one-way clutch for a pulley according to claim 5,
The reverse rotation prevention member is disc-shaped and can move between the forward rotation allowable position and the reverse rotation prevention position by rotating in the guide groove, and is not in contact with the pulley shaft by centrifugal force during forward rotation. A one-way clutch for pulleys, characterized by being configured as follows.
In the one-way clutch for pulleys as described in any one of Claim 2 to 6,
A one-way clutch for a pulley, wherein the guide groove is covered with a cover plate to form a unit.
A pulley, wherein the one-way clutch for pulleys according to any one of claims 1 to 7 is fixed.
The pulley of claim 8;
A pulley shaft that rotatably supports the pulley;
A flat belt transmission system comprising: a flat belt hung on the pulley.
The flat belt transmission system of claim 9,
The pulley is a meander control pulley that controls meandering of the flat belt,
The flat belt transmission system, wherein the meandering control pulley is configured to prevent the flat belt from being driven in the reverse direction.
The flat belt transmission system according to claim 10,
A flat belt transmission system characterized in that it is used in a blower without rotational fluctuation.
In the flat belt transmission system according to any one of claims 9 to 11,
A flat belt transmission system, wherein the flat belt is configured to slip when the flat belt is driven in a reverse direction with a force equal to or greater than a predetermined tension.