JP5342681B2 - Belt mounting jig and belt mounting method using this belt mounting jig - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a belt mounting fixture to be more convenient by making the structure simple and compact, the belt mounting fixture being used in winding a belt while a span between pulley shafts is fixed, for a two-stage pulley having a near-side pulley and a far-side pulley arranged in line in the axial direction. <P>SOLUTION: The belt mounting fixture 9 is equipped with a cover part 10 to cover the periphery of the near-side pulley 5, and a bending guide curved face 11 located on the side nearer to the second rotating direction B than the cover part 10 and formed by rounding a corner part on a first rotation direction A side of a block body protruded to the radial outward of the pulley and on the far-side pulley side, for bending a V-ribbed belt 4 crossing on the cover part 10 and introduced to the periphery of the far-side pulley 6 to guide the V-ribbed belt to the periphery of the far-side pulley 6. The bending guide curved face 11 is extended to the pulley radial outside, longer than at least the belt width of the V-ribbed belt 4, thus prohibiting the belt 4 from getting over toward the second rotation direction B. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

  The present invention relates to a belt mounting jig and a belt mounting method using the belt mounting jig. Specifically, the present invention relates to a technique for winding a belt around a so-called two-stage pulley having a front pulley and a rear pulley.

  A belt capable of expanding and contracting in the circumferential direction between the rear pulley of the two-stage pulley provided with the front pulley and the rear pulley arranged side by side in the axial direction and the second pulley as the other pulley, As a belt mounting jig used for winding with the distance between the rear pulley and the second pulley fixed, for example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2007-120678) further discloses a front pulley flange. An introduction part for hooking the inner side of the belt on the front side, a delivery guide for covering the outer peripheral side of the front pulley and guiding the belt guided from the introduction part to the pulley groove of the rear pulley, and a pulley groove of the rear pulley A presser piece that is positioned above and presses the lift of the belt inserted through the pulley groove of the rear pulley, and an attachment part for attaching the introduction part, the transfer guide, and the presser piece to the two-stage pulley. It discloses vignetting belt mounting jig.

  Similarly, Patent Document 2 (Japanese Patent Application Laid-Open No. 2008-164053) discloses that a guide member including a pulley mounting portion and a belt guide portion that are fitted in an outer pulley groove and covers an outer pulley flange and a central pulley flange is provided by a stay. A belt mounting jig that is fixed to a pulley and used so that the V-ribbed belt is fitted and held in an inner pulley groove by this stay is disclosed.

  However, in the configuration of Patent Document 1, since the inner side of the belt is hung on the introduction portion arranged on the front side of the front side pulley flange, when the belt tension becomes high, this tension is applied to the belt mounting jig. It works to push down the front pulley flange to the near side. In order to prevent this collapse, in the configuration of Patent Document 1, an attachment portion for attaching the introduction portion, the transfer guide, and the presser piece to the two-stage pulley is indispensable. The belt mounting jig has a complicated structure and cannot be made more compact.

  On the other hand, the configuration of Patent Document 2 requires a stay that fixes the belt mounting jig to the pulley and fits and holds the belt in the inner pulley groove. However, this stay will not be easy for general users.

  The present invention has been made in view of such various points, and its main purpose is as a rear pulley of a two-stage pulley including a front pulley and a rear pulley arranged side by side in the axial direction, and other pulleys. A simple and compact belt attachment jig used to wrap a belt that can be stretched in the circumferential direction between the second pulley and the rear pulley and the second pulley with the distance between the axes fixed. It is to improve to a simple structure and easy to use.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above, and the inventors of the present invention have completed the following belt mounting jig having no mounting section and stay as a result of intensive research.

According to the aspect of the present invention, the rear pulley of the two-stage pulley having a front pulley and a rear pulley arranged side by side in the pulley axial direction and having a first rotation direction and a second rotation direction, and the like A belt mounting jig used for winding a belt that can be expanded and contracted in the circumferential direction between the second pulley and the second pulley as a pulley of the second pulley while fixing the distance between the axes of the rear pulley and the second pulley. Is configured as follows. That is, the belt mounting jig includes a cover portion that covers an outer periphery of the front pulley, a block body that is disposed on the second rotational direction side of the cover portion and protrudes outward in the pulley radial direction, The block body is formed by rounding a corner on the first rotation direction side and on the back pulley side, and is arranged on the second rotation direction side with respect to the cover portion. A bending guide portion for bending the belt introduced to the outer periphery of the rear pulley so as to bend and follow the outer periphery of the rear pulley. The back pulley side surface of the block body is orthogonal to the pulley axial direction, and the bending guide portion extends in parallel with a straight line in the pulley radial direction passing through the back pulley side surface of the block body. In addition, the belt extends outward in the pulley radial direction at least longer than the belt width of the belt, thereby prohibiting the belt from getting over in the second rotational direction.

  The belt mounting jig is used as follows. That is, first, in a state where the belt attachment jig is in contact with the outer periphery of the front pulley so that the cover portion is on the first rotational direction side when viewed from the bending guide portion, the belt is It is wound around two pulleys, crosses over the cover part, and is bent along the outer periphery of the rear pulley while being bent by the bending guide part. Next, the two-stage pulley is rotated in the first rotation direction. Then, a high tension is generated in the belt by being stretched. The tension acts as a pressing action for pressing the cover portion against the outer periphery of the near-side pulley because the belt intersects the cover portion, and the belt itself pushes the bending guide portion into the second guide portion. It works as a climbing action to try to get over in the direction of rotation. Here, since the bending guide portion extends outward in the pulley radial direction at least longer than the belt width of the belt, the belt rides over the bending guide portion in the second rotational direction. Therefore, the belt itself is prohibited from climbing over the bending guide portion in the second rotational direction. When the two-stage pulley is continuously rotated in the first rotation direction, the belt extending from the cover portion to the opposite side of the bending guide portion is close to the outer periphery of the front pulley, and soon the cover portion. The upper belt leaves the cover part and moves to the outer periphery of the rear pulley. After this movement, the belt mounting jig is recovered from the outer periphery of the front pulley.

  Here, when the belt attachment jig according to the present invention (hereinafter also referred to as the present application jig) is compared with the belt attachment jig disclosed in Patent Document 2 (hereinafter also referred to as the reference jig 2), the present application jig is compared. Does not have an essential configuration for the stay provided in the reference jig 2. Accordingly, the jig of the present application has (i) a function of holding the belt in a fitted state in the inner pulley groove, and (ii) a function of fixing the guide member to the first pulley. It appears that the functions (i) and (ii) are lacking. However, as described above, in the jig of the present application, the belt itself is prohibited from climbing over the bending guide portion in the second rotation direction. It is an alternative to the function. In addition, the above-mentioned pressing action can be exhibited without any problem by this overriding prohibiting action, and therefore the jig of the present application is sufficiently provided with the function (ii). And since the stay could be deleted in this way, the jig of the present application is simple in structure and more convenient than the reference jig 2.

  Next, when the above-mentioned jig is compared with the belt attachment jig disclosed in Patent Document 1 (hereinafter also referred to as the reference jig 1), the present application jig includes the introduction portion / attachment portion of the reference jig 1. Is not required. Therefore, the jig of the present application lacks the function of (iii) smoothly guiding the belt to the delivery guide, which the introduction portion of the reference jig 1 has. However, it seems that the presence or absence of the introduction portion does not contribute much to the smooth introduction of the belt to the delivery guide. Accordingly, although the present application jig certainly lacks the introduction part of the reference jig 1, it cannot be said that the function (iii) is also lacking. And since the said introduction part can be deleted without a problem, the attachment part made essential can also be abbreviate | omitted simultaneously, Therefore Compared with the reference jig | tool 1, this application jig | tool is simple and compact.

  In the present specification, in principle, “(the block body on which the bending guide portion is formed) is arranged closer to the second rotational direction side than the cover portion” means that “(the bending guide portion is formed). Means that the block body is arranged on the second rotational direction side rather than all of the cover part, except that “(the block body on which the bending guide part is formed) is the cover part. It is also meant that it is arranged on the second rotational direction side than at least a part of “.

  In addition, the said bending | flexion guide part is specifically comprised as follows. A block body that protrudes outward in the radial direction of the pulley is disposed on the second rotational direction side of the cover portion. The bending guide portion is formed by rounding a corner of the block body on the first rotation direction side and on the back pulley side. According to the above configuration, the belt mounting jig provided with the cover portion and the bending guide portion can have a well-structured structure.

  The belt mounting jig is further configured as follows. That is, the cover portion is formed with a bulging portion that bulges outward in the pulley radial direction on the first rotational direction side of the belt intersecting the cover portion. According to the above configuration, the belt extending from the cover portion to the opposite side of the bending guide portion is close to the outer periphery of the front pulley, and soon the belt on the cover portion leaves the cover portion and When moving to the outer periphery of the back pulley, the belt jumps slightly and moves to the outer periphery of the back pulley due to the presence of the bulging portion. Therefore, if there is a flange between the near side pulley and the far side pulley, the belt can easily jump over the flange. On the other hand, a movement in which the belt approaches slightly from above is realized.

The belt mounting jig is further configured as follows. That is, a contact portion that contacts the side surface of the two-stage pulley is provided. Thus, by providing the abutting portion that abuts on the side surface of the two-stage pulley, the posture of the belt mounting jig on the outer periphery of the front pulley is further stabilized, and the belt tension causes the belt It can suppress that a belt attachment jig remove | deviates from the outer periphery of the said near side pulley.
The belt mounting jig is further configured as follows. That is, the bending guide portion extends in parallel with a straight line in the pulley radial direction passing through the central portion in the pulley circumferential direction of the surface on the back pulley side in the block body.

  According to another aspect of the present invention, the rear pulley of the two-stage pulley comprising a front pulley and a rear pulley arranged in parallel in the pulley axial direction and having a first rotation direction and a second rotation direction; In addition, a belt that wraps a belt that can be expanded and contracted in the circumferential direction between the second pulley as the other pulley while fixing the distance between the rear pulley and the second pulley is fixed as follows: It is done by the method like this. That is, the belt mounting jig is used as follows. (A) The belt attachment jig is brought into contact with the outer periphery of the near-side pulley so that the cover portion is on the first rotation direction side when viewed from the bending guide portion. (B) The belt is wound around the second pulley, crosses over the cover portion, and is bent along the outer periphery of the rear pulley while being bent by the bending guide portion. (C) The two-stage pulley is rotated in the first rotation direction. According to the above method, the belt can be wound between the rear pulley and the second pulley without performing an esoteric operation such as a stay attaching operation required in the configuration of Patent Document 2.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The belt mounting jig according to this embodiment is used to wrap a V-ribbed belt between a crank pulley, which is a so-called two-stage pulley, and a compressor pulley of an air conditioner.

  FIG. 1 is a partial perspective view of an engine body. FIG. 2 is a cross-sectional view of the two-stage pulley. Hereinafter, the winding of the V-ribbed belt around the crank pulley and the compressor pulley will be described with reference to FIG. 1, and the structure of the crank pulley which is a two-stage pulley will be described with reference to FIG.

  As shown in FIG. 1, the engine body 1 includes a crank pulley 2 (two-stage pulley) connected to an engine crankshaft and a compressor pulley 3 (second pulley) connected to an input shaft of an air conditioner compressor. Are supported rotatably with a predetermined distance between the axes. Between the crank pulley 2 and the compressor pulley 3, a V-ribbed belt 4 schematically shown by a solid line and a two-dot chain line is hung, so that the power of the crankshaft is supplied to the crank pulley 2, the V-ribbed belt 4, and the compressor pulley 3. Are transmitted in order to the input shaft of the compressor. In the present embodiment, the inter-shaft distance between the crank pulley 2 and the compressor pulley 3 cannot be changed, and as shown in the figure, an auto tensioner (tension applying means) that applies tension to the V-ribbed belt 4 is provided. Not installed.

  The crank pulley 2 is a two-stage pulley, and includes a front pulley 5 and a rear pulley 6 having the same diameter and arranged in parallel in the pulley axial direction as shown in FIGS. The rear pulley 6 is sandwiched between the engine body 1 and the front pulley 5 in the pulley axial direction. Specifically, the V-ribbed belt 4 wound between the crank pulley 2 and the compressor pulley 3 is provided between the rear pulley 6 of the crank pulley 2 and the compressor pulley 3, as shown in FIG. It is wrapped around.

  As shown in FIG. 2, the front pulley 5 and the back pulley 6 are integrally formed, and between the front pulley groove 5 a of the front pulley 5 and the back pulley groove 6 a of the back pulley 6. A central flange 7 is provided in an annular shape, and a front pulley flange 5b is provided on the opposite side to the central flange 7 across the front pulley groove 5a, and a rear side is provided on the opposite side of the central flange 7 across the rear pulley groove 6a. The pulley flanges 6b are each provided in an annular shape. A crankshaft (not shown) of the engine is inserted into the boss portion 8 of the crank pulley 2. Reference numeral 2 a indicates a side surface of the crank pulley 2.

  The belt width of the V-ribbed belt 4 shown in FIG. 1, the pulley width of the compressor pulley 3, the pulley width of the front pulley 5 and the pulley width of the back pulley 6 shown in FIG. . Specifically, the V-ribbed belt 4 overlaps the rear pulley flange 6b, the rear pulley groove 6a, and a part of the center flange 7 as schematically indicated by a two-dot chain line in FIG. The V-ribbed belt 4 according to the present embodiment is a low modulus belt that can expand and contract in the circumferential direction.

  1 indicates the travel direction of the V-ribbed belt 4, and the rotation direction of the crank pulley 2 when the V-ribbed belt 4 travels in this travel direction is defined as a first rotation direction A (first rotation direction). A direction opposite to the first rotation direction A is defined as a second rotation direction B (second rotation direction).

  Next, the configuration of the belt mounting jig according to the present embodiment will be described with reference to FIGS. FIG. 3 is a perspective view of a belt mounting jig according to an embodiment of the present invention. 3A to 3D are perspective views of the belt attachment jig 9 as seen from different directions. FIG. 4 is a six-side view of a belt mounting jig according to an embodiment of the present invention. FIG. 4A is a front view of the belt mounting jig 9. FIG. 4B is a plan view of the belt mounting jig 9. FIG. 4C is a bottom view of the belt mounting jig 9. FIG. 4D is a left side view of the belt mounting jig 9. FIG. 4E is a right side view of the belt mounting jig 9. FIG. 4F is a rear view of the belt attachment jig 9. 5 (a) is an enlarged view of FIG. 3 (a), and FIG. 5 (b) is an enlarged view of FIG. 3 (c). 6 (a) is an enlarged view of FIG. 4 (b), and FIG. 6 (b) is an enlarged view of FIG. 4 (a).

  In FIGS. 3 to 4, a resin-made belt attachment jig 9 which is compact and well-organized and is integrally formed is drawn from various directions.

  As shown in FIGS. 5 to 6, the belt attachment jig 9 includes a cover portion 10 and a bending guide curved surface 11 (bending guide portion) as main components. The belt attachment jig 9 further includes a block body 13, a bulging portion 14, and a contact portion 15. This belt attachment jig 9 is used in contact with the outer periphery of the front pulley 5 and is substantially equal to the pulley width of the front pulley 5 shown in FIG. 1, and the block body 13 shown in FIG. On the outer periphery of the near-side pulley 5 shown in FIG. 1, the orientation is determined so as to be closer to the second rotation direction B side than the cover portion 10. Hereinafter, for convenience of explanation, the first rotation direction A and the second rotation direction B defined in FIG. That is, the symbols A and B in FIGS. 5 to 6 correspond to the first rotation direction A and the second rotation direction B of the crank pulley 2 shown in FIG.

  The cover portion 10 covers the front pulley groove 5a (outer periphery) of the front pulley 5 in a state where the belt mounting jig 9 is in contact with the outer periphery of the front pulley 5 as shown in FIG. (See also 12). In the present embodiment, the cover portion 10 covers a part of the front pulley flange 5b and the central flange 7 in addition to the front pulley groove 5a. The cover portion 10 is curved in an arc shape so as to follow the front pulley groove 5a of the front pulley 5, and has a length of at least the belt width 4w of the V-ribbed belt 4 from the block body 13 in the first rotational direction A. Extending towards. On the inner peripheral surface of the cover portion 10, a rib 10 a that can be fitted into the front pulley groove 5 a of the front pulley 5 is formed. Reference numeral 10 b in FIG. 5A denotes an end portion of the cover portion 10 on the side far from the back pulley 6.

  As shown in FIG. 5, the block body 13 is a substantially rectangular parallelepiped that protrudes outward in the pulley radial direction. A rib 13b that can be fitted to the front pulley groove 5a of the front pulley 5 is formed on the inner peripheral surface of the block body 13 (end surface in the pulley radial direction). The rib 13b is connected to the rib 10a. Reference numeral 13 c in FIG. 5A indicates an end surface of the block body 13 on the back pulley 6 side, and reference numeral 13 d indicates an end surface of the block body 13 on the cover portion 10 side. That is, the end surface 13c and the end surface 13d of the block body 13 are orthogonal to each other as shown in FIG.

  The bending guide curved surface 11 is arranged on the second rotation direction B side with respect to the cover portion 10, and crosses the cover portion 10 to be introduced into the rear pulley groove 6 a (outer periphery) of the rear pulley 6. Is a curved surface for bending along the back pulley groove 6a of the back pulley 6. The bending guide curved surface 11 is formed in the block body 13 in the present embodiment. Specifically, the bending guide curved surface 11 extends in the pulley radial direction and is rounded to the corner 13a of the block body 13 on the first rotation direction A side and on the rear pulley 6 side of the corner 13a. It is formed by attaching. The bending guide curved surface 11 extends outward in the pulley radial direction longer than at least the belt width 4w of the V-ribbed belt 4 (see FIG. 5A). That is, the identification is based on the joining position of the outer peripheral surface 10c of the cover 10 and the end surface 13d of the block body 13 when focusing on the pulley radial direction in the front view of the belt mounting jig 9 shown in FIG. The distance 11h between the possible junction P and the upper end 11t of the bending guide curved surface 11 satisfies the relationship 11h> 4w. In the present embodiment, the relationship of 11h = 4w × 1.2 is established.

  The bulging portion 14 is formed to bulge outward from the cover portion 10 in the pulley radial direction. Specifically, as shown in FIG. 5A, the bulging portion 14 is formed on the first rotational direction A side with respect to the V-ribbed belt 4 that intersects the cover portion 10. More specifically, the bulging portion 14 is formed so as to protrude from a corner portion of the cover portion 10 that is the farthest from the block body 13 and the closest side to the back pulley 6. The bulging portion 14 is formed with a downward tapered surface 14 a that descends toward the V-ribbed belt 4 intersecting the cover portion 10. The downward taper surface 14a is a plane connected to the outer peripheral surface 10c of the cover portion 10 in the present embodiment.

  When the rib 10a of the cover portion 10 is fitted in the front pulley groove 5a of the front pulley 5, the abutment portion 15 abuts or closely contacts the side surface 2a of the crank pulley 2 shown in FIG. As shown in FIG. 5B, the block body 13 extends toward the pulley shaft.

  Next, the usage method of said belt attachment jig 9 is demonstrated, referring FIGS. FIG. 7 is a first explanatory view of a method for using the belt mounting jig. FIG. 8 is a second explanatory view of a method for using the belt mounting jig. FIG. 9 is a third explanatory view of the method of using the belt mounting jig. FIG. 10 is a view taken along the arrow 10 in FIG. 9 and is a fourth explanatory view of the method of using the belt mounting jig. FIG. 11 is a fifth explanatory view of the method of using the belt mounting jig. FIG. 12 is a functional explanatory diagram of the bulging portion.

  First, as shown in FIG. 7, a cylindrical connecting portion 17a of a wrench 17 is connected to the boss portion 8 of the crank pulley 2 so that the crank pulley 2 can be manually rotated freely.

<Procedure (a)>
Next, the belt mounting jig 9 is brought into contact with the near-side pulley groove 5a of the near-side pulley 5 so that the cover portion 10 is on the first rotation direction A side when viewed from the bending guide curved surface 11 (FIG. 5A). See also). At this time, the line connecting the pulley shaft 2x of the crank pulley 2 and the pulley shaft 3x of the compressor pulley 3 and the line connecting the pulley shaft 2x of the crank pulley 2 and the belt mounting jig 9 are at a right angle so that they are at right angles. The contact position of the belt mounting jig 9 with respect to the front pulley groove 5a of the side pulley 5 is determined.

<Procedure (b)>
In this state, the V-ribbed belt 4 is wound around the compressor pulley 3 and crosses over the cover portion 10 as shown in FIG. Then, the V-ribbed belt 4 is bent along the bending guide curved surface 11 so as to be along the inner pulley groove 6 a of the inner pulley 6.

  Specifically, the V-ribbed belt 4 wound around the compressor pulley 3 is sequentially arranged in a direction opposite to the traveling direction of the V-ribbed belt 4, that is, the connecting portion 17 a of the wrench 17, the belt mounting jig 9, and the back side of the back pulley 6. It winds around the pulley groove 6a in this order. That is, the V-ribbed belt 4 is first wound around the connecting portion 17 a of the wrench 17. The twist of the V-ribbed belt 4 between the compressor pulley 3 and the connecting portion 17a is approximately zero degrees. Next, the V-ribbed belt 4 is hooked on the bending guide curved surface 11. At this time, care should be taken so that the belt attachment jig 9 does not separate from the front pulley groove 5 a of the front pulley 5. In this state, the twist of the V-ribbed belt 4 between the connecting portion 17a and the protrusion side end portion 10b of the cover portion 10 is approximately 90 degrees in the S twist direction, and the protrusion side end portion 10b of the cover portion 10 and the bending guide are bent. The twist of the V-ribbed belt 4 between the curved surface 11 is approximately 45 degrees in the Z twist direction. Further, the twist of the V-ribbed belt 4 between the bending guide curved surface 11 and the back pulley groove 6a of the back pulley 6 is approximately 45 degrees in the S twist direction.

<Procedure (c)>
Next, as shown in FIGS. 7 to 11, the crank pulley 2 is rotated in the first rotation direction A by approximately 120 degrees.

Specifically, first, the crank pulley 2 is moved about 30 degrees while holding the belt mounting jig 9 against the front pulley groove 5a of the front pulley 5 so that the state shown in FIG. Rotate in one rotation direction A. Then, high tension is generated in the V-ribbed belt 4 by being stretched. As shown in FIG. 5A, the tension acts as a pressing action that presses the cover portion 10 against the near-side pulley groove 5 a of the near-side pulley 5 because the V-ribbed belt 4 intersects the cover portion 10. At the same time, the V-ribbed belt 4 itself works as a climbing action to try to climb over the bending guide curved surface 11 in the second rotational direction B. Due to the pressing action, the belt mounting jig 9 is firmly fixed to the front pulley groove 5a of the front pulley 5, and the belt mounting jig 9 slides on the front pulley groove 5a of the front pulley 5. It becomes difficult. With regard to the above-described overcoming action, the bending guide curved surface 11 extends at least longer than the belt width 4w of the V-ribbed belt 4 outward in the pulley radial direction. There is no provision for getting over in the rotational direction B, and the V-ribbed belt 4 itself is prohibited from going over the bending guide curved surface 11 in the second rotational direction B. The above “cutting” means a state in which at least a part of the V-ribbed belt 4 reaches and exceeds the upper end 11t of the bending guide curved surface 11 so that the tension of the V-ribbed belt 4 is further converted into the above-described climbing action. In this embodiment, since the bending guide curved surface 11 extends outward in the pulley radial direction at least longer than the belt width 4w of the V-ribbed belt 4, how the posture of the V-ribbed belt 4 bent by the bending guide curved surface 11 is determined. Regardless, it is easy to maintain the separation between the upper end 11t of the bending guide curved surface 11 and the V-ribbed belt 4. When the above state is reached, it is no longer necessary to manually hold the belt mounting jig 9 against the near side pulley groove 5a of the near side pulley 5 due to the presence of the above pressing action.

  The crank pulley 2 is continuously rotated in the first rotation direction A by about 80 degrees so that the state of FIG. Then, the fitting region of the V-ribbed belt 4 with respect to the back-side pulley groove 6a of the back-side pulley 6 is gradually widened, and the V-ribbed belt 4 extending from the cover portion 10 to the opposite side to the bending guide curved surface 11 is connected to the connecting portion 17a. It moves away and approaches the near side pulley groove 5a of the near side pulley 5. In this state, the twist of the V-ribbed belt 4 between the compressor pulley 3 and the projection-side end portion 10b of the cover portion 10 is approximately 90 degrees in the S twist direction, and the side surface 2a of the crank pulley 2 It contacts two places with respect to the internal peripheral surface in which the rib was formed. 9 and FIG. 10 are exactly the same state.

  Further, the crank pulley 2 is rotated about 10 degrees in the first rotation direction A so as to change from the state of FIG. 10 to the state of FIG. Then, soon, the V-ribbed belt 4 on the cover portion 10 leaves the cover portion 10 and moves to the back-side pulley groove 6a of the back-side pulley 6 so that the elastic energy stored in the V-ribbed belt 4 is minimized. After this movement, the belt attachment jig 9 is recovered from the front pulley groove 5 a of the front pulley 5.

  Specifically, when the crank pulley 2 is rotated in the first rotational direction A from the state of FIG. 10, the V-ribbed belt 4 hooked on the side surface 2a of the crank pulley 2 is directed in a direction away from the connecting portion 17a in the pulley radial direction. As shown in FIG. 11, the V-ribbed belt 4 moves in the direction of the thick arrow as shown by the two-dot chain line and the solid line. Played well. The movement of the V-ribbed belt 4 at this time is shown in detail in FIG. In FIG. 12, the V-ribbed belt 4 is repelled from the left side to the right side of the drawing. At this time, the V-ribbed belt 4 collides with the downward taper surface 14a of the bulging portion 14, and the collision causes the V-ribbed belt 4 to jump so as to be ejected outward in the pulley radial direction. The V-ribbed belt 4 approaches the back pulley groove 6a of the back pulley 6 slightly obliquely from above, and lands on the back pulley groove 6a of the back pulley 6 as indicated by the thick arrow in the figure.

(Summary)
(Claim 1)
As described above, in the above-described embodiment, the belt attachment jig 9 is configured as follows. In other words, the belt attachment jig 9 is arranged on the cover portion 10 covering the front pulley groove 5a of the front pulley 5 and on the second rotational direction B side with respect to the cover portion 10, and crosses the cover portion 10 to the back. A bending guide curved surface 11 for bending the V-ribbed belt 4 introduced into the back pulley groove 6 a of the side pulley 6 and following the back pulley groove 6 a of the back pulley 6. The bending guide curved surface 11 extends outward in the pulley radial direction at least longer than the belt width 4w of the V-ribbed belt 4, thereby preventing the belt from getting over in the second rotational direction.

  Compared to the reference jig 2, the belt mounting jig 9 is simple in structure and more convenient because the stay can be deleted. Further, the belt mounting jig 9 is simple and compact as compared with the reference jig 1 because the introduction section can be eliminated without any problem, and at the same time, the essential mounting section can be omitted. .

  In the above-described embodiment, the bending guide curved surface 11 is arranged on the second rotational direction B side rather than all of the cover portion 10, but the cover portion 10 further extends further on the second rotational direction B side than the bending guide curved surface 11. Even if it exists, there is no particular hindrance. However, the portion of the cover portion 10 located on the second rotational direction B side with respect to the bending guide curved surface 11 applies the tension of the V-ribbed belt 4 to the front pulley groove 5 a of the front pulley 5 of the belt attachment jig 9. Does not have a function to act as a pressing action to press.

  In the above embodiment, the distance between the axes of the crank pulley 2 and the compressor pulley 3 cannot be changed. However, the distance between the axes of the crank pulley 2 and the compressor pulley 3 may be variable. Even when the distance between the shafts is variable, when the V-ribbed belt 4 is to be wound between the crank pulley 2 and the compressor pulley 3 while the distance between the shafts is fixed, the special structure described above is used. The significance of the belt mounting jig 9 is fully recognized.

  Moreover, it replaces with the bending guide curved surface 11 of the said embodiment, and the corner | angular part 13a of the cross section perpendicular | vertical of the block body 13 can also be utilized as a bending guide part as it is.

(Addition of claim 1)
The belt attaching jig 9 is further configured as follows. That is, the block body 13 that protrudes outward in the radial direction of the pulley is provided on the second rotational direction B side of the cover portion 10. A bending guide curved surface 11 is formed by rounding the corner of the block body 13 on the first rotation direction side and the rear pulley side, and the cover portion 10 is first removed from the block body 13. It is formed extending in the rotation direction A. According to the above structure, the belt attachment jig 9 provided with the cover part 10 and the bending guide curved surface 11 can be made into a well-structured structure.

(Claim 2)
The belt attaching jig 9 is further configured as follows. That is, the cover portion 10 is formed with a bulging portion 14 bulging outward in the pulley radial direction on the first rotational direction A side with respect to the V-ribbed belt 4 intersecting the cover portion 10. According to the above configuration, the V-ribbed belt 4 extending from the cover portion 10 to the opposite side of the bending guide curved surface 11 is close to the near-side pulley groove 5a of the near-side pulley 5, and soon the V-ribbed belt 4 on the cover portion 10 is covered. When moving away from the portion 10 to the rear pulley groove 6 a of the rear pulley 6, the V-ribbed belt 4 jumps slightly due to the presence of the bulging portion 14 and moves to the rear pulley groove 6 a of the rear pulley 6. Will be. Accordingly, as shown in FIG. 12, the V-ribbed belt 4 can easily jump over the center flange 7 between the front pulley 5 and the back pulley 6, and in the back pulley groove 6 a of the back pulley 6. On the other hand, the movement in which the V-ribbed belt 4 approaches slightly obliquely from above is realized. Note that these two effects result in mitigation of damage to the V-ribbed belt 4 caused by collision of the V-ribbed belt 4 with the rear pulley groove 6a of the rear pulley 6.

  The bulged portion 14 may be formed to have a curved surface that is smoothly connected to the outer peripheral surface 10c of the cover portion 10 instead of the downward tapered surface 14a. Further, the bulging height of the bulging portion 14 may be appropriately increased or decreased according to the belt width 4 w of the V-ribbed belt 4. This is because the flight distance in the pulley axis direction from the jump to the landing increases or decreases.

(Claim 3)
The belt attaching jig 9 is further configured as follows. That is, the belt mounting jig 9 includes a contact portion 15 that contacts the side surface 2 a of the crank pulley 2. By providing the contact portion 15 that contacts the side surface 2a of the crank pulley 2 in this way, the posture of the belt mounting jig 9 on the front pulley groove 5a of the front pulley 5 is further stabilized, so that the V-ribbed belt It is possible to prevent the belt mounting jig 9 from being detached from the front pulley groove 5 a of the front pulley 5 due to the tension of 4. Further, the contact portion 15 also has an effect of simplifying proper positioning of the belt attachment jig 9 with respect to the crank pulley 2.

(Claim 4)
The belt attaching jig 9 is used as follows. (A) The belt mounting jig 9 is brought into contact with the near-side pulley groove 5 a of the near-side pulley 5 so that the cover portion 10 is on the first rotation direction A side when viewed from the bending guide curved surface 11. (B) The V-ribbed belt 4 is wound around the compressor pulley 3, crosses over the cover portion 10, and is bent by the bending guide curved surface 11 so as to be along the inner pulley groove 6 a of the inner pulley 6. (C) The crank pulley 2 is rotated in the first rotation direction A. According to the above method, the V-ribbed belt 4 is wound between the rear pulley 6 and the compressor pulley 3 without performing an esoteric operation such as the stay attaching operation required in the configuration of Patent Document 2. it can.

  Although the preferred embodiment of the present invention has been described above, the above embodiment can be implemented with the following modifications.

  That is, in the said embodiment, the combination of the crank pulley 2 and the compressor pulley 3 was illustrated as a combination of a two-stage pulley and a 2nd pulley. However, instead of this, even when the V-ribbed belt 4 is wound around a combination of a combination of the crank pulley 2 and the water pump pulley, a combination of the crank pulley 2 and the alternator pulley, the belt attachment jig 9 described above is used. Good.

It is a fragmentary perspective view of an engine body. It is sectional drawing of a two-stage pulley. It is a perspective view of the belt attachment jig concerning one embodiment of the present invention. It is a 6th page figure of the belt attachment jig concerning one embodiment of the present invention. 5 (a) is an enlarged view of FIG. 3 (a), and FIG. 5 (b) is an enlarged view of FIG. 3 (c). 6 (a) is an enlarged view of FIG. 4 (b), and FIG. 6 (b) is an enlarged view of FIG. 4 (a). It is 1st explanatory drawing of the usage method of a belt attachment jig. It is a 2nd explanatory view of the usage method of a belt attachment jig. It is a 3rd explanatory view of the usage method of a belt attachment jig. FIG. 10 is a fourth explanatory view of the method of using the belt mounting jig, taken along line 10 in FIG. 9. It is a 5th explanatory view of the usage method of a belt attachment jig. It is function explanatory drawing of a bulging part.

DESCRIPTION OF SYMBOLS 1 Engine body 2 Crank pulley 3 Compressor pulley 4 V-ribbed belt 5 Crank pulley front pulley 6 Crank pulley rear pulley 9 Belt mounting jig 10 Cover portion 11 Bending guide curved surface (bending guide portion)
13 Block body 13a Corner A First rotation direction B Second rotation direction

Claims (5)

The rear pulley of the two-stage pulley having a front pulley and a rear pulley arranged side by side in the pulley axial direction and having a first rotation direction and a second rotation direction, and a second pulley as another pulley, , A belt mounting jig used for winding a belt that can be expanded and contracted in the circumferential direction while fixing a distance between the axes of the back pulley and the second pulley,
A cover portion covering the outer periphery of the front pulley;
A block body disposed on the second rotational direction side of the cover part and protruding outward in the pulley radial direction;
The block body is formed by rounding the corner on the first rotation direction side and on the back pulley side, and is introduced to the outer periphery of the back pulley across the cover portion. A bending guide for bending the belt along the outer periphery of the rear pulley;
With
The back pulley side surface of the block body is orthogonal to the pulley axial direction,
The bending guide portion extends in parallel with a straight line in the pulley radial direction passing through the surface on the back pulley side in the block body, and extends outward in the pulley radial direction at least longer than the belt width of the belt. By prohibiting the belt from getting over in the second direction of rotation,
A belt mounting jig characterized by that. The belt mounting jig according to claim 1,
The cover portion is formed with a bulging portion bulging outwardly in the pulley radial direction on the first rotational direction side of the belt intersecting the cover portion.
A belt mounting jig characterized by that. The belt mounting jig according to claim 1 or 2,
A contact portion that contacts the side surface of the two-stage pulley;
A belt mounting jig characterized by that.   The belt mounting jig according to any one of claims 1 to 3,
  The bending guide portion extends in parallel with a straight line in the pulley radial direction passing through a central portion in the pulley circumferential direction of the surface on the back pulley side in the block body.
A belt mounting jig characterized by that. The rear pulley of the two-stage pulley having a front pulley and a rear pulley arranged side by side in the pulley axial direction and having a first rotation direction and a second rotation direction, and a second pulley as another pulley, , A belt mounting method for winding a belt that can be expanded and contracted in the circumferential direction while fixing the distance between the axes of the back pulley and the second pulley,
The belt mounting jig according to any one of claims 1 to 4 is used as follows.
A belt mounting method characterized by the above.
(A) The belt attachment jig is brought into contact with the outer periphery of the near-side pulley so that the cover portion is on the first rotation direction side when viewed from the bending guide portion.
(B) The belt is wound around the second pulley, crosses over the cover portion, and is bent along the outer periphery of the rear pulley while being bent by the bending guide portion.
(C) The two-stage pulley is rotated in the first rotation direction.

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