JP4361960B1 - Belt mounting jig - Google Patents

Abstract

Provided is a belt attachment jig capable of preventing a belt from being detached or displaced from the other pulley when the belt is extended and attached while rotating a pulley.
A fixing portion 12 is provided on a belt mounting jig 1 and fixed to a pulley 2. A holding surface 9 is provided on the belt mounting jig 1. The holding surface 9 holds a part of the belt 4 in the vicinity of the pulley flange 8 and on the near side. The belt 4 is also hung on the other pulley 3. The pulley 2 is rotated. A portion of the belt 4 held by the holding surface 9 is attached to the pulley 2 by sliding in the pulley axial direction. A pressing portion 6 is provided to press the belt 4 from the holding surface 9 to the pulley 3 toward the back side. The pressing portion 6 prevents the belt 4 from coming off from the pulley 3 or being displaced.
[Selection] Figure 4

Description

  The present invention relates to a belt attachment jig for attaching a belt that can be extended in the circumferential direction to the pulley groove while rotating a pulley having a pulley groove on an outer peripheral surface.

  Generally, in a belt transmission mechanism in which a belt is wound around a plurality of pulleys having pulley grooves on the outer peripheral surface, tension such as a tension pulley is applied so that a predetermined belt tension is applied after the belt is attached to the plurality of pulleys. Adjustment means are provided.

  In order to eliminate the need for such tension adjusting means, a belt has appeared that is extended in the circumferential direction so as to get over the pulley flange when attached to the pulley. Further, Patent Document 1 discloses that the belt extends in the circumferential direction. A belt mounting jig is disclosed for extending over a pulley flange while being extended and fitting into a pulley groove.

  FIG. 5 shows a belt mounting jig disclosed in Patent Document 1. The belt attaching jig 101 is used by being attached to one pulley 102. The belt 104 is fitted in the pulley groove 103 at the rear of the pulley rotating direction than the belt attaching jig 101, and the belt 104 is attached to the holding surface 105. It is designed to be hung and held. Further, the belt 104 is wound around the other pulley, a tool is mounted on the center bolt 106 of the pulley 102 and rotated, the belt mounting jig 101 is advanced forward in the pulley rotation direction, and the pulley groove 103 in the belt 104 is rotated. The belt 104 is attached to the pulley 102 by gradually widening the range that fits into the pulley 102.

JP 2006-300192 A (paragraph numbers 0028, 0035, 0036, 0043, 0044, FIG. 6)

  However, since the belt hung on the belt mounting jig of Patent Document 1 passes through the near side of the pulley on which the belt mounting jig is mounted and reaches the other pulley, the pulley is rotated when the interval between the plurality of pulleys is narrow. However, if the belt is to be attached, the belt pulled strongly may come off the other pulley from the near side.

  An object of the present invention is to provide a belt attachment jig that can prevent a belt from being detached from the other pulley when the belt is attached while the pulley is rotated.

  In order to achieve the above object, a belt mounting jig according to the present invention is provided with a belt that is attached to one of a plurality of pulleys having a pulley groove on an outer peripheral surface, and is capable of extending in a circumferential direction. The belt is wound around the other pulley, and is hooked on the belt mounting jig. In this state, the belt is mounted on the pulley groove of the one pulley while rotating the one pulley. In addition, the belt mounting jig receives a part of the belt until the belt slides in the pulley axial direction and fits into the pulley groove of the one pulley. A holding surface that holds the outer circumferential surface of the pulley flange of the pulley in the radial direction outer side and the pulley axial direction front side. Further, in order to prevent the belt from coming off from the other pulley, it is located radially outward from the outer peripheral surface of the pulley flange of one pulley, and passes through the front side of the one pulley from the holding surface to the other pulley. A pressing part is provided to hold the belt reaching the pulley toward the back side.

  According to the above configuration, since the holding portion for pressing the belt to the back side is provided, when the belt is attached while rotating the pulley, the portion of the belt that is wound around the other pulley is disengaged or displaced. Can be prevented. In addition, since the holding part is provided on the belt mounting jig itself, there is no need to provide another member for holding the belt between the pulleys, and the distance between the pulleys is so narrow that another member cannot be provided between the pulleys. Even in such a case, it is possible to prevent the belt from being detached or displaced.

  In other words, the belt hung on the holding surface of the belt mounting jig passes through the near side of one pulley in the middle of reaching the other pulley. May come off or be displaced. In particular, when the distance between the pulleys is narrow, the belt is more likely to be detached or misaligned as the distance is narrowed. On the other hand, the belt that passes the front side of one pulley is placed between the pulleys by providing a pressing part that is positioned radially outward from the outer peripheral surface of the pulley flange with the belt mounting jig attached to the pulley. The belt can be pushed away from the other pulleys to prevent the belt from coming off or being displaced.

  Here, the holding surface is a surface located on the near side in the pulley axial direction with respect to the pulley flange, and a surface in a range located on the same plane as the outer peripheral surface of the pulley flange or on the radially outer side. With this holding surface as a boundary, a belt is fitted into the pulley groove at the rear in the pulley rotation direction, and the belt is passed forward of the pulley in the axial direction at the front in the pulley rotation direction. It can be hung on a mounting jig. Furthermore, when the pulley is rotated, the holding surface also rotates in the circumferential direction following this, so the belt passing in front of the pulley in the axial direction of the pulley in front of the holding surface moves radially outward. Then, when it reaches the outer side in the radial direction from the outer peripheral surface of the pulley flange, it slips over the pulley flange and fits into the pulley groove.

  Further, a jig main body having a holding surface and a fixing portion can be provided, and the jig main body and the pressing portion can be integrated via a connecting plate provided on the front side thereof.

  According to this configuration, the pressing portion can be provided at a position away from the jig body that is directly fixed to the pulley so as to be positioned radially outward from the pulley flange. While connecting the pressing portion, interference between the connecting member and the belt can be prevented.

  Specifically, the connecting plate can be shaped like a disc having a diameter larger than that of one pulley, and an arc-shaped pressing portion can project from a part of the inner peripheral edge.

  According to this configuration, since the arc-shaped pressing portion is provided on the periphery of the connecting plate, even if the belt mounting jig rotates as the pulley rotates, the pressing portion only moves along the longitudinal direction. Thus, the belt can be pressed at any part of the pressing portion while the belt is attached. In addition, the holding portion may be provided in a range corresponding to the rotation angle of the pulley necessary for attaching the belt. By providing the holding portion only on a part of the periphery of the connecting plate, the belt is attached to the belt mounting jig. When hanging, it can prevent that a pressing part gets in the way.

  In addition, a holding surface can be formed at one end of the jig body, and a fixing portion can be provided at the other end so that the fixing portion can be fitted to the center bolt of the pulley.

  According to this configuration, the belt mounting jig can be easily attached to the pulley by simply fitting the fixing portion to the center bolt of the pulley while setting the jig body as small as possible.

  As described above, according to the present invention, the holding portion is provided on the belt mounting jig to be attached to one pulley to hold the belt. Therefore, when the belt is attached to one pulley without providing another member between the pulleys, It is possible to prevent the pulley from being detached from or displaced from the pulley. Thereby, for example, even when the distance between the pulleys is so narrow that another member cannot be provided between the pulleys, the belt can be reliably attached to the plurality of pulleys.

The perspective view of the belt attachment jig which concerns on this invention Side view of belt mounting jig Front view of the belt mounting jig attached to the pulley The figure which shows the procedure of attaching a belt to a pair of pulleys using a belt attachment jig A perspective view showing a conventional belt mounting jig

  Hereinafter, the form for implementing the belt attachment jig concerning the present invention is explained using a drawing.

  As shown in FIGS. 1 to 3, the belt mounting jig 1 is used by being mounted on the front side in the pulley axial direction of one pulley 2 out of, for example, a pair of pulleys 2 and 3 having a pulley groove on the outer peripheral surface. The belt 4 is put on the belt mounting jig 1 and the other pulley 3, and the belt 4 is put in the pulley groove formed on the outer peripheral surface of the pulley 2 while rotating one pulley 2 together with the other pulley 3. It is designed to be attached.

  This belt attaching jig 1 includes a jig main body 5 for attaching the belt 4 to the pulley 2, and a holding part 6 for holding the belt 4 from being separated from the pulley 3 or being displaced. It is set as the structure integrated through the connection board 7 provided in the near side.

  The jig body 5 is a thick plate having an approximately elliptical shape, and the longitudinal direction is set to the radius of the pulley 2 so that one end is located near the pulley flange 8 of the pulley 2 and the other end is located near the rotation center of the pulley 2. Mounted according to the direction. Note that the belt mounting jig 1 can be selected by appropriately selecting only the shape of the resin part 5a by combining the both with the resin part 5a near the one end of the jig body 5 and the metal part 5b near the center and the other end. It can be made to correspond to each size pulley, and the metal part 5b can be shared.

  The thickness of the jig body 5 is set to a size that allows the belt 4 to be hung on the peripheral surface, and the holding surface 9 that receives and holds a part of the belt 4 on the peripheral surface of the jig body 5, and this A guide surface 10 for guiding the belt 4 from the holding surface 9 to the front side of the pulley 2 is formed.

  The holding surface 9 is set on the outer peripheral surface of the pulley flange 8 in the radial direction outside the outer peripheral surface of the pulley flange 8 or in a range that is flush with the peripheral surface of the one end portion of the jig body 5. The holding surface 9 is configured so that a part of the belt 4 is moved from the outer peripheral surface of the pulley flange 8 until the belt 4 stretched with the rotation of the pulley 2 slips in the pulley axial direction so as to get over the pulley flange 8 and fits into the pulley groove. Are also held radially outward and on the near side in the pulley axial direction.

  At the rear end in the rotation direction of the holding surface 9, a detachment stop 11 is provided so as to restrict the belt 4 hung on the belt mounting jig 1 from coming off to the front side. By hooking the belt 4 on the stopper 11, the belt 4 fits in the pulley groove of the pulley 2 behind the stopper 11, and on the front of the pulley 4 in the rotational direction than the stopper 11. Is held by the holding surface 9 across the front side.

  The guide surface 10 is formed in a curved shape that swells forward in the rotational direction of the pulley 2 continuously to the holding surface 9, and smoothly guides the belt 4 held by the holding surface 9 toward the front side of the pulley 2.

  A fixing portion 12 for fixing the belt mounting jig 1 to one pulley 2 is provided at the other end of the jig body 5. The fixing portion 12 has a tubular shape penetrating the other end portion of the jig body 5 from the back side to the near side, and the back side end portion is fitted to the center bolt 13 of the pulley 2, whereby the belt mounting jig 1. Is attached to the pulley 2. The front end of the fixed portion 12 can engage with the tool 14, and the pulley 2 is rotated via the fixed portion 12 and the center bolt 13.

  The holding part 6 is an arc-like long plate having a radius of curvature larger than that of the pulley 2 and set to a length that is about ½ of the circumferential length of the pulley 2. The pressing portion 6 is positioned radially outward from the outer peripheral surface of the pulley flange 8 of the pulley 2 and presses the belt 4 from the holding surface 9 through the near side of the pulley 2 to the pulley 3 toward the back side. As a result, the belt 4 is prevented from coming off or displaced from the other pulley 3 to the near side. The distal end surface of the pressing portion 6 is set to be flush with the inner surface of the pulley flange 8 so as to press the belt 4 until it reaches the pulley groove.

  The connecting plate 7 is disposed on the front side of the jig body 5 and the pressing portion 6, and the jig body 5 and the pressing portion 6 are screwed to the inner surface of the connecting plate 7, for example. The part 6 is integrated. The connecting plate 7 is formed in a disk shape having a diameter larger than that of the pulley 2 so that the pressing portion 6 protrudes from a part of the rear peripheral edge and is positioned on the outer side in the radial direction than the pulley flange 8. In the center of the connecting plate 7, the fixing portion 12 penetrates to the front side, and the pulley 14 is rotated by engaging the tool 14 with the fixing portion 12 from the front side of the connecting plate 7.

  The belt 4 can be extended in the circumferential direction so that tension adjusting means such as a tensioner is not required. For example, the belt 4 has a structure in which a core wire made of polyamide is embedded in the belt main body. Is set to 2-3%.

  When a V-ribbed belt is used as the belt 4, the belt attachment jig 1 is used for the attachment, thereby preventing the belt 4 from coming off from the pulley 3 and preventing the rib from being displaced. It can be correctly fitted into the corresponding rib grooves of the pulleys 2 and 3. The belt 4 may be a belt other than a V-ribbed belt such as a flat belt.

  Next, a procedure for attaching the belt 4 to the pair of pulleys 2 and 3 using the belt attaching jig 1 will be described. In FIG. 4, the connecting plate 7 of the belt mounting jig 1 is indicated by a two-dot chain line, and the pulley 2, the belt 4, the jig body 5, and the pressing portion 6 hidden by the connecting plate 7 are indicated by a solid line.

  First, as shown in FIG. 4A, the jig body 5 is passed through the inside of the belt 4, and the rear end portion of the fixing portion 12 until the inner surface of the jig body 5 contacts the pulley flange 8. Is fitted to the center bolt 13 of the pulley 2 to attach the belt mounting jig 1 to the pulley 2. Further, the pulley 2 is appropriately rotated so that the jig body 5 is positioned behind the line connecting the rotation centers of the pulleys 2 and 3 in the rotation direction.

  Further, the belt 4 is wound around the pulley 3, and the belt 4 is fitted in the pulley groove of the pulley 2 behind the jig body 5 in the pulley rotation direction. Further, the belt 4 is hung on the stopper 11 of the jig body 5, straddled on the pulley flange 8 so as to be bent in the belt width direction, and pulled out to the front side of the pulley 2.

  The belt 4 is hung on the holding surface 9 and the guide surface 10 of the jig body 5, and the belt 4 is passed in front of the jig body 5 in the pulley rotation direction and in front of the pulley 2 in the pulley axial direction. In this state, no tension is applied to the belt 4, and the belt 4 can be easily hung on the jig body 5 and the pulleys 2 and 3. In addition, since the pressing portion 6 is positioned on the opposite side of the pulley 3, the jig body 5 and the pulley 2 are not interfered with the pressing portion 6 from the front side of the pulley 2 of the belt 4 to the pulley 3. 3 and the belt 4 can be hung.

  Next, as shown in FIG. 4B, by rotating the pulley 2, the jig body 5 advances forward in the pulley rotation direction while extending the belt 4, and there is a range in which the belt 4 fits in the pulley groove. It spreads. Here, in order to rotate the pulley 2, for example, a commercially available tool 14 is attached to the front end portion of the fixing portion 12 fitted to the center bolt 13 of the pulley 2 and rotated. The pulley 3 rotates with the pulley 2 via the jig body 5 and the belt 4.

  Further, with the rotation of the pulley 2, the pressing portion 6 moves along the circumferential direction of the pulley 2 and is positioned on the side facing the pulley 3. As a result, the holding portion 6 holds the belt 4 from the front side of the pulley 2 to the pulley 3 and pushes the portion toward the back side, so that the belt 4 can be removed from the pulley 3 toward the front side. Prevent misalignment. That is, since the belt 4 passes through the front side of the pulley 2, when the belt 4 is attached to the pulley 2 while being extended, the belt 4 hung on the pulley 3 is strongly pulled obliquely toward the front side, but the pressing portion 6 is connected to the belt 4. Is pushed away from the pulley 3 to prevent the belt 4 from detaching or shifting.

  Since the belt 4 is fitted in the pulley groove behind the jig body 5 in the pulley rotation direction and the movement in the pulley axial direction is restricted, the restoring force of the belt 4 bent in the belt width direction at the front in the pulley rotation direction A force for moving the belt 4 toward the pulley groove is applied. The restoring force of the belt 4 is a thrust force as a component of belt tension or an elastic force of the belt 4.

  The belt 4 moves radially outward from the vicinity of the center of the pulley 2 in front of the jig main body 5 in the pulley rotation direction, and gradually approaches the outer edge of the pulley flange 8. Eventually, the restoring force of the belt 4 causes the belt 4 to get over the pulley flange 8 and slides on the holding surface 9 to fit into the pulley groove. As shown in FIG. It is attached. By removing the belt attachment jig 1 from the center bolt 13 of the pulley 2, the attachment of the belt 4 is completed.

DESCRIPTION OF SYMBOLS 1 Belt attachment jig 2, 3 Pulley 4 Belt 5 Jig body 5a Resin part 5b Metal part 6 Holding part 7 Connecting plate 8 Pulley flange 9 Holding surface 10 Guide surface 11 Detachment 12 Fixing part 13 Center bolt 14 Tool

Claims (4)

The belt is attached to one of a plurality of pulleys having a pulley groove on the outer peripheral surface, and a belt that can be extended in the circumferential direction is wound around the other pulleys of the plurality of belts and hung on the belt mounting jig. A belt attaching jig for attaching the belt to the pulley groove of the one pulley while rotating the pulley of the pulley,
A fixing portion for fixing the belt mounting jig to the one pulley, and receiving the part of the belt until the belt slides in the pulley axial direction and fits into a pulley groove of the one pulley. A holding surface that holds the outer circumferential surface of the pulley flange of the pulley in the radial direction outer side and the pulley axial direction front side,
The belt is positioned radially outward from the outer peripheral surface of the pulley flange of the one pulley so as to prevent the belt from coming off the other pulley, and passes through the front side of the one pulley from the holding surface. A belt mounting jig, characterized in that a pressing portion for pressing a belt reaching another pulley toward the back side is provided.   The jig main body having the holding surface and the fixing portion is provided, and the jig main body and the pressing portion are integrated via a connecting plate provided on the front side thereof. The belt mounting jig described in 1.   3. The belt according to claim 2, wherein the connecting plate has a disk shape larger in diameter than the one pulley, and an arc-shaped pressing portion protrudes from a part of a rear peripheral edge thereof. Mounting jig.   The jig body has the holding surface formed at one end thereof, the fixing portion provided at the other end, and the fixing portion being freely engageable with a center bolt of a pulley. The belt attachment jig according to claim 2 or 3.

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