JP4525226B2 - Rolling connection chain belt with pin / link partial locking means - Google Patents

Description

  The present invention relates to a chain belt, and in particular, adjacent ends of first and second links arranged adjacent to each other along the extending direction of the chain belt are overlapped with each other. The pin is passed through the first hole formed in the end portion of the first link and the second hole formed in the end portion of the second link at the overlapping portion. Accordingly, the present invention relates to an improvement in the chain belt having a structure in which the first and second links are connected to each other.

  As described above, the ends of each of the two links arranged adjacent to each other in the extending direction of the chain belt are overlapped, a hole is made in the overlapped portion, and a pin is passed through the overlapped hole and each 2 The structure connecting the two links is the most basic structure of the chain belt. Chain belts are used in various chain belt drives. When the chain belt is stretched over a pair of conical surfaces facing each other so as to be seated on the pair of conical surfaces at both ends of the pin, the pulley is changed by changing the distance between the pair of conical surfaces. The ratio of the rotational power transmitted by the chain belt between pulleys can be changed by changing the winding radius with respect to the pulley, so that it is often used to constitute a continuously variable transmission by combining with such pulleys. ing.

When a chain belt is bent by using a pair of half-moon-shaped pins that roll on each other in an arcuate surface facing each other in a circular contour instead of the fitting structure of a circular sectional pin and a circular contour hole There is known a structure in which the relative motion of the members around the pins is supported by rolling of the opposed arcuate surfaces of a pair of meniscus pins, which is shown, for example, in FIG. Has been. In the invention of this Patent Document 1, the sliding rotation between the semicircular circle of one half-moon pin and the circular hole in the above-described known technique is changed from a half-moon shape to an arcuate cross-sectional shape. This is replaced with linear sliding between the end of the pin and the straight side of the hole changed from a circular shape to a substantially square shape.
JP-A-57-51044

Further, in Patent Document 2 below, the pin has a cross-section of a pin that is constricted at the center, and the hole of the link has a contour that exhibits a convex portion facing the center of the pin. There has been proposed a structure in which rolling is performed between a pin and an auxiliary pin by interposing another spherical locking body between the portion and the convex portion.
JP-A-6-129495

  As with the structure proposed in Patent Document 2 above, many things have been done so far to incorporate the rolling structure into the engagement between the pin and the link in the rotational connection of the link by the pin. Is to interpose a third member such as the above-described spherical locking body between the pin and the hole of the link. If a third member such as a spherical locking body is interposed between the pin and the edge of the hole of the link, it is easy to incorporate rolling into the relative movement between the members that are in contact with each other. The packaging increases the complexity of the structure and increases the cost of manufacturing and assembling the parts.

  In view of the manufacturing and assembly cost disadvantages of interposing a third member in addition to the pin to incorporate rolling engagement in the pivotal connection between links in this way, In Japanese Patent Application No. 2003-024617 concerning the invention of the same person as the inventor of the present application, as a chain belt that enables rotational connection between links only by rolling without using a third member, “chain belt” Adjacent ends of the first and second links arranged adjacent to each other along the extending direction of the first and second links are overlapped with each other, and the overlapping portions are formed at the ends of the first links. The first and second links are connected to each other by passing a pin through one hole and the second hole formed at the end of the second link at the overlapping portion. A chain belt with a structure The edges of the first and second holes facing each other across the pin are cross sections of the pin along the surface of the pin when the first and second links are angularly biased relative to the pin. A chain belt characterized in that it is formed in a contour that rolls from one end to the other.

  According to the chain belt proposed above, the relative motion of the members around the pin when the chain belt is bent is the rolling motion between the edge of the hole formed entirely at the end of the link and the pin. However, when the chain belt is used as a continuously variable transmission between a pair of conical surfaces facing each other and used as a continuously variable transmission, the inventor of the present application states that there is a further improvement. Noticed. When the first and second links connected to each other through each one pin as described above are angularly biased relative to the pins, the edges of the holes of the first and second links are When the pin rolls from one end to the other end of the cross-section of the pin along the surface of the pin, the pin slightly deviates in the direction along the surface of the pin along with the rolling. The pin must be somewhat deflectable in the direction of the pin surface in the hole of the link, in other words, the pin extends between the pulleys of the chain belt in the hole of the link In the straight section, the pin must be inserted between the opposing edges of the holes of each of the two links because it must be inserted with some gap left at the other end. First, the pin is pushed in the position where the chain belt winds around the pulley. Pin position when meet is that the impact caused occurs that is irregular. However, the rolling engagement between each pin and the edge of the hole of the two links contacting both surfaces is the rolling engagement as in the examples shown in FIGS. 6 and 8 of the previous application. When the slippage is restricted by the teeth meshing with each other over the entire surface, each pin sits on the pulley at both ends, and is supported by the pulley at both ends while supporting the link at the middle portion of the pulley. When turning around, the pin will bend somewhat due to the load exerted by the link, so that the mutual slip bias between the pin and the hole in the link is restricted, which can result in power loss and undesired wear on that part. There is.

  The present invention pays attention to such a problem, and has an object to further improve the chain belt as proposed above.

In order to solve the above-mentioned problem, the present invention is such that adjacent ends of first and second links arranged adjacent to each other along the extending direction of the chain belt are overlapped with each other. The pin passes through the first hole formed at the end of the first link at the portion and the second hole formed at the end of the second link at the overlapping portion. In this way, the first and second links are connected to each other to form a chain belt, and the edges of the first and second holes facing each other across the pin are the first and second links. When the link is bent from the linearly aligned state , the portion that rolls along the surface of the pin and contacts the surface of the pin moves from one end to the other end of the cross section of the pin. an arc-shaped convex surface, said first and second link Wherein Ri state near aligned linearly first and second holes of edge the pins the first and optionally Rutoki engage each other in contact with the surface of the at the end of the cross-section of the pin Slipping in the rolling direction between the edge of the second hole and the surface of the pin, and the edge of the first and second holes rolls along the surface of the pin, pin departing from each other engagement when the contact portion between the edge of the first and second holes are moved toward the one end portion of the cross-section of the pin to the other end along the surface of the pin / The present invention proposes a chain belt characterized in that a link partial locking means is provided.

  In the chain belt as described above, the pin / link partial locking means is provided in the concave portion provided in one of the edge of the first and second holes and the surface of the pin, and the other. It may consist of convex parts. In particular, the concave portion may have a V shape, and the convex portion may have a mountain shape that is complementary to the V shape.

  In the chain belt as described above, the pin may have a substantially constant thickness from the one end portion to the other end portion as viewed in the cross section, or the pin The thickness may gradually decrease from the one end to the other end as seen in the cross section.

  Further, in the chain belt as described above, the edge of the hole of at least one of the first and second links is formed as a separate member from the other part of the link and is attached to the edge member. It may be. In this case, when at least one of the first and second links is arranged in parallel in the width direction of the chain belt, the edging member is connected to the plurality of links arranged in parallel. It may be a pin-shaped member that extends.

Adjacent ends of the first and second links arranged adjacent to each other along the extending direction of the chain belt are overlapped with each other and formed at the end of the first link at the overlapping portion. The first and second links are formed by passing a pin through the first hole formed and the second hole formed at the end of the second link at the overlapping portion. In the chain belt structured to be connected to each other, the edges of the first and second holes facing each other with the pin interposed therebetween are arcuate convex surfaces, and the first and second links are linear. When bent from the aligned state, the edges of the first and second holes facing each other across the pin roll along the surface of the pin, and the portion in contact with the surface of the pin moving Suruga from one end of the cross section toward the other end, Said first and second links that are in contact with the surface of the pin at the one end of the edge of the Ri state near aligned linearly first and second holes transverse section of the pin in this Sometimes engaged with each other to prevent sliding in the rolling direction between the edges of the first and second holes and the surface of the pin, and the first and second holes along the surface of the pin And the contact portion between the surface of the pin and the edge of the first and second holes is along the surface of the pin from the one end portion to the other end portion of the cross section of the pin. If there is provided a pin / link partial locking means that is disengaged from each other when moved , the first and second links are in the linear running portion of the chain belt and are in a linearly aligned state. In some cases, the pin / link partial locking means are engaged so that the pins are sandwiched between each other. Slip in the rolling direction between the edges of the mating first and second holes and the surface of the pin is prevented, and the lateral position along the surface of the pin relative to the first and second links is It is stably regulated at a predetermined position. Then, as the chain belt starts to wrap around the pulley and bending occurs between the first and second links, the contact portion between the edge of the hole of the first and second links and the pin is changed. When the edge of the hole of the first and second links is moved from one end of the pin cross section to the other end by rolling of the edge of the hole of the first and second links with respect to the surface of the pin, the pin / link partial locking means is released to the surface of the pin Sliding is allowed for rolling of the edges of the first and second holes along. Therefore, in the linear running portion of the chain belt, the lateral position along the surface of the pin with respect to the first and second links is stably held at a predetermined position, and all the pins are uniformly with the pulley. Even if the chain belt wraps around the pulley, and the load from the link acts on the pin supported by the pulley at both ends, the pin is bent somewhat The twist of the rolling engagement surfaces between the pin and the edge of the link hole due to the bending of the pins is easily released by the slip between the rolling engagement surfaces, which is preferable for power loss and this part. The occurrence of wear is reliably avoided.

  In this case, the pin / link partial locking means comprises a concave portion provided on one of the edge of the first and second holes and the surface of the pin and a convex portion provided on the other side. For example, the first and second links are in the straight running portion of the chain belt and are in a linearly aligned state, and the edge of the hole of the first and second links and the pin are at one end of the pin cross section. The engagement between the concave and convex portions reliably prevents slippage between the rolling engagement surfaces of the pin and the edge of the link hole, and the lateral movement along the surface of the pin with respect to the first and second links. The directional position is reliably and stably regulated at a predetermined position. Then, the first and second links are bent from the linearly aligned state, and the rolling engagement portion at the edge of the pin and the first and second holes is directed from one end to the other end of the pin cross section. When the transition is made, the engagement between the concave portion and the convex portion is easily and reliably released, and slipping is allowed between the rolling engagement surfaces of the edge of the pin and the link hole as necessary.

In particular, if the concave portion is V-shaped and the convex portion is a mountain shape complementary to the V-shape, each pin and the first and second links connected thereby are arranged around the pulley. The pin and the edge of the first and second holes facing each other across the pin are in rolling engagement at the other end of the pin cross section, and the pin / link partial locking means is released. From this state, the pin and the first and second links again move to the linear portion between the pulleys, and the engaging portion of the edge of the pin and the first and second holes transitions from the other end of the pin cross section to one end. Thus, when the pin / link partial locking means is re-engaged, even if there is a deviation in the relative position between the pin and the edge of the first and second holes, such deviation is And guided by the fitting of the convex part of the angle that complements it, When the first and second links connected to each other move to the straight part between the pulleys, the lateral position along the surface of the pin with respect to the first and second links is reliably set at a predetermined position. It will be in the state.

  If the pin has a substantially constant thickness from one end to the other end when viewed in a cross section, the pin can be manufactured by punching or the like as it is from the plate material, so the manufacturing cost is reduced accordingly. If the thickness of the pin is gradually reduced from the one end portion to the other end portion when viewed in the cross section, the first and the first and the first pin connected thereby are connected to each pin. The second link is positioned around the pulley, and the pin and the edge of the first and second holes facing each other across the pin are in rolling engagement at the other end of the pin cross-section. The pressing load acting between the pin and the edge of the first hole and the pressing load acting between the pin and the edge of the second hole are both in contact with the edge of the pin and the edge of the first hole, respectively. Mating tangent plane and pin and second hole edge Nearer perpendicular to the tangent plane of engagement, the squeezing action acting on each surface during the abutting engagement of the pin and the edge of the first and second holes is reduced, so that these abutting engagement surfaces The resulting wear is reduced.

  If the edge of at least one of the holes of the first and second links is formed of a member formed separately from and attached to the other part of the link, the separate member has high pressure strength. By being made of a material, the pressure resistance of the edge of the hole can be increased without being restricted by the selection of a material suitable for manufacturing the link body. Further, when at least one of the first and second links is arranged in parallel in the width direction of the chain belt, the edge member extends over the plurality of links arranged in parallel. If the pin-like member is present, the edge of the link hole can be easily reinforced by inserting the pin-like member.

  FIG. 1 is a side view showing a chain belt according to the present invention in an exploded view, in part, for one embodiment, and FIG. 2 is a chain belt according to a section 2-2 in FIG. It is sectional drawing which looked at the cross section of this in the arrow direction.

In the figure, 10 is a pin, 12 is a first link to pin 10, 14 is a second link to pin 10, and these first and second links are at their adjacent ends. The pins 10 are passed through holes formed in the overlapping portions so as to be pivotable to each other. That is, the half-moon shaped holes 16 are opened symmetrically with respect to the center line 18 in the longitudinal direction of the link at both ends of the first link 12. In addition, a meniscus hole 20 is opened symmetrically with respect to the longitudinal center line 22 of the link. The pin 10 is provided through the overlapping portion of the holes 16 and 20, and the edge 24 formed on the arc-shaped convex surface as illustrated in the hole 16 and the edge formed on the arc-shaped convex surface as illustrated in the hole 20 26 so that a tensile force is transmitted between the links 12 and 14.

  In FIG. 1, a similar link (not shown) is connected to the left side of the link 12 via a pin 10a. A similar link 28 is connected to the right side of the link 14 via a pin 10b, and a similar link 30 is connected to the lower right side of the link 28 via a pin 10c. A similar link (not shown) is connected via a pin 10d. Note that the contour links appearing in FIG. 1 are not only one, but a large number of the same type of links are stacked in the thickness direction of the links as shown in FIG. The power can be transmitted. The chain belt made up of these links is moving to the right in the figure as shown by the arrows, and now the link 28 is just wrapped around a pulley not shown in the figure. It's getting on.

  The chain belt shown in the figure is used in such a manner that the chain belt is stretched between pulleys and is bent in a straight line or only one side thereof. In the state shown, the first and second links 12 and 14 are in the linear extension of the chain belt and the link 14 is at the end of the linear extension. When the first and second links 12 and 14 are in the linear extension of the chain belt, the edge 24 of the hole 16 of the link 12 and the edge 26 of the hole 20 of the link 14 facing each other across the pin 10 are The pin 10 is formed so as to be in contact with the surface of the pin at one end (the lower end in FIG. 1) when viewed in a cross section. Then, the chain belt moves to the right in the drawing by one link from the state shown in the figure, and when the link 12 reaches the position of the link 14 and the link 14 reaches the position of the link 28, the link 12 Between the link 14 and 28 shown in the figure, and accordingly, the contact between the hole edge 24 of the link 12 and the hole edge 26 of the link 14 with respect to the pin 10 is It moves from one end (the lower end in FIG. 1) to the other end (the upper end in FIG. 1), and the state shown between the links 14 and 28 in the figure.

  On both sides of the pin 10, the hole edge 24 of the link 12, and the hole edge 26 of the link 14, the chain belt is in a linearly extending portion, and the edge of the hole 16 of the link 12 facing the pin 10 therebetween. 24 and the edge 26 of the hole 20 of the link 14 are located at a position where one end (the lower end in FIG. 1) of the pin 10 is in contact with the surface of the pin at a position where the concave portion 32 and the convex portion 34 are formed. A pin / link which consists of a fitting and restricts the relative positional relationship of the rolling engagement between the edge 24 of the hole 16 of the pin 10 and the link 12 and the edge 26 of the hole 20 of the link 14 against sliding in the rolling direction. Partial locking means are provided. In the example shown in FIG. 1, the concave portion 32 is provided on the pin 10 side and the convex portion 34 is provided on the edge 24 of the hole 16 of the link 12 and the edge 26 of the hole 20 of the link 14. May be reversed, i.e., similar protrusions are provided on the pin 10 side and similar recesses are provided on the edge 24 of the hole 16 of the link 12 and the edge 26 of the hole 20 of the link 14. May be provided.

  The concave / convex contours of the pin / link partial locking means are relative to each other when the pin 10 and the link 24 are engaged with each other at the edge 24 of the hole 16 of the link 12 and the edge 26 of the hole 20 of the link 14. Any concave / convex contour can be used as long as the relationship can be regulated against slippage in the rolling direction. In particular, as shown in the example shown in FIG. 1, the concave portion is V-shaped. The convex portion is preferably a chevron that complements the concave V-shape. When the concave / convex contour of the pin / link partial locking means is such a contour, the pin is shown as 10b or 10c. After the engagement between the concave portion and the convex portion is disengaged, the chain belt further advances around the pulley in this state, and the pin is disengaged from the engagement with the pulley and the chain belt is again engaged. Of the link 12 that reaches the linear extension and faces the pin 10 16 edge 24 and the edge 26 of the hole 20 in the link 14 are seen in the cross-section of the pin 10 from the one end (this time not shown in FIG. 1 but additionally shown in FIG. 1). For example, when the concave portion 32 and the convex portion 34 come into contact with each other again at the upper end portion in the drawing), the convex portion at the edge 24 of the hole 16 of the link 12 and the concave portion 32 of the link 10 is provided. 34, or even if there is a misalignment in the alignment between the concave portion 32 of the pin 10 and the convex portion 34 at the edge 26 of the hole 20 of the link 14, the V shape and the complementary shape are used. The misalignment is easily corrected by the guide action brought about by the engagement with the formed chevron, and the pin 10 is aligned again with respect to the link by the re-engagement of the concave portion 32 and the convex portion 34, and in this state It is wound around the other pulley not shown in the figure. A similar alignment effect occurs when each pin turns around the other pulley and then leaves the other pulley and proceeds to the linear extension, ie, the linear extension shown in FIG. Therefore, during the operation of the chain belt, the pins in the linear extension shown in FIG. 1 are already aligned with the link, and in that state, the pins are uniformly wound around the pulley.

  When such a pin / link partial locking means is provided, the pin 10 is slightly connected to the link according to the relative rotation between the links 12 and 14 around the pin 10. Since the pin is biased in the outward direction of the bend, the pin needs to be dimensioned to leave a gap 36 that allows the above-described bias to the edge of the link hole at one end thereof.

  The contours seen in FIG. 1 of the hole edge 24 of the link 12 and the hole edge 26 of the link 14 may be arcs, the curvature of which depends upon the bending between the links 12 and 14 as shown. The contact portion between the hole edge 24 of the link 12 and the hole edge 26 of the link 14 with respect to the pin 10 moves from the one end (the lower end in FIG. 1) to the other end (the upper end in FIG. 1). What is necessary is just to be decided to do. In this way, a pivotal connection by means of the pin 10 is achieved between the links 12 and 14, with the engagement between the link 12 and the pin 10 and the engagement between the link 14 and the pin 10 being in particular an auxiliary lock. Even if some third member such as a body is not interposed, all of them are in rolling engagement.

  In the embodiment shown in FIG. 1, the pin 10 has a uniform thickness when viewed in cross section, but the thickness of the pin 10 is such that the chain belt is straight as shown in FIG. When the chain belt is wound around the pulley from the one end that contacts the edge 24 of the hole of the link 12 and the edge 26 of the hole of the link 14 when in the extending portion, the edge 24 and 26 contact the same. The contour may be gradually reduced toward the other end. In FIG. 3, portions corresponding to the portions shown in FIG. 1 are denoted by the same reference numerals as in FIG. Thus, if the thickness of the pin 10 is a contour that gradually decreases from the one end portion toward the other end portion, the pin 10b is shown as shown for the pin 10b when the chain belt is wound around the pulley. The pressing load F1 acting between the pin 10b and the hole edge 26 of the link 14 and the pressing load F2 acting between the pin 10b and the hole edge 24 of the link 28 are both of the pin 10b and the link 14 respectively. The contact surface S1 of the contact edge of the hole 26 and the contact surface S2 of the contact edge S2 of the hole 24 of the pin 10b and the link 28 are more nearly perpendicular to each other. The ironing action acting on each surface during contact engagement is reduced, and the wear generated on these contact engagement surfaces is reduced accordingly.

  FIG. 4 is an exploded side view similar to FIG. 1 showing yet another embodiment of the present invention. Also in FIG. 4, portions corresponding to the portions shown in FIG. 1 are denoted by the same reference numerals as in FIG. In this embodiment, the hole edges 24 and 26 of at least one of the first and second links 12 and 14 (both in the illustrated example) are formed as separate members from the main body of the link. It is comprised by the edge members 38 and 40 attached to. Since the contact between the edges of the holes of the links 12 and 14 and the surface of the pin 10 is theoretically a line contact, these contact surfaces require high pressure strength. Although it is relatively easy to make the entire pin 10 resistant to bending and shearing and exhibit high surface pressure resistance, the links 12 and 14 need to be made of a material having excellent toughness as a whole. It is generally difficult to obtain high surface pressure strength at the same time. Therefore, the edge of the hole of the link in contact with the surface of the pin is formed of a material selected from the viewpoint of increasing the pressure resistance strength separately from the link body (in other words, the other part) and attached thereto. By being constituted by members, the pressure strength of the edge of the hole can be increased without being limited to the selection of a material suitable for manufacturing the link body.

  The edge members 38 and 40 may be members provided individually for each link to edge the edge in rolling contact with the pin 10 of each link hole. Alternatively, the edge members 38 and 40 are also shown in FIG. In this way, it may be provided as a pin member having an arcuate cross section extending over the whole of the same type of links 12 or 14 superposed in the lateral direction. In the former case, each edge member 40 or 42 must be fixedly attached by fixing means such as baking or welding along the edge of the hole of each link. The members 40, 42 are simply inserted into the link polymer hole with the pin 10, so that both ends do not touch the pulley and do not fall out of the link holes on both sides of the link polymer. It is only necessary that the movement in the lateral direction is restricted by a suitable locking means.

  While the present invention has been described in detail with respect to several embodiments thereof, it will be apparent to those skilled in the art that various modifications can be made to these embodiments within the scope of the present invention. .

1 is an exploded side view of one embodiment of a chain belt according to the present invention, with a portion thereof being shown. Sectional drawing which looked at the cross section of the chain belt by the cut surface 2-2 of FIG. 1 in the arrow direction. FIG. 2 is an exploded side view similar to FIG. 1 showing an example in which a part of the embodiment shown in FIG. 1 is changed. FIG. 6 is an exploded side view similar to FIG. 1 showing yet another embodiment of the present invention. Sectional drawing which looked at the cross section of the chain belt by the cut surface 5-5 of FIG. 4 in the arrow direction.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10,10a, 10b, 10c, 10d ... Pin, 12, 14 ... Link, 16 ... Hole of link 12, 18 ... Center line of longitudinal direction of link 12, 20 ... Hole of link 14, 22 ... Longitudinal direction of link 14 24 ... the edge of the hole 16 of the link 12, 26 ... the edge of the hole 20 of the link 14, 28,30 ... the link, 32 ... the recess, 34 ... the convex part, 36 ... the gap, 38, 40 ... the edging member

Claims (7)

Adjacent ends of the first and second links arranged adjacent to each other along the extending direction of the chain belt are overlapped with each other and formed at the end of the first link at the overlapping portion. The first and second links are formed by passing a pin through the first hole formed and the second hole formed at the end of the second link at the overlapping portion. The chain belts are structured to be connected to each other, and the edges of the first and second holes facing each other with the pin interposed therebetween are bent from the state in which the first and second links are linearly aligned. The portion that rolls along the surface of the pin and contacts the surface of the pin is an arcuate convex surface that moves from one end to the other end of the cross section of the pin , and the first and second link state near Ri said first and aligned to linear Second hole edge is engaged with each other Rutoki in contact with the surface of the pin at the one end of the cross-section of said pin between said first and edges and the pin of the surface of the second hole Slip in the rolling direction is prevented, the edges of the first and second holes roll along the surface of the pin, and the contact portion between the surface of the pin and the edge of the first and second holes Is provided with pin / link partial locking means that disengages from each other when moved from the one end to the other end of the cross section of the pin along the surface of the pin. Chain belt.   The pin / link partial locking means comprises a concave portion provided on one of the edge of the first and second holes, the surface of the pin, and a convex portion provided on the other side. The chain belt according to claim 1.   3. The chain belt according to claim 2, wherein the concave portion has a V shape, and the convex portion has a mountain shape which is complementary to the V shape.   The chain belt according to any one of claims 1 to 3, wherein the pin has a substantially constant thickness from the one end portion to the other end portion as viewed in the cross section. .   The chain belt according to any one of claims 1 to 3, wherein the pin has a thickness that gradually decreases from the one end to the other end as viewed in the cross section.   The edge of the hole of at least one of the first and second links is formed by a border member formed as a separate member from the other portion of the link and attached thereto. The chain belt in any one of 1-5.   A plurality of at least one of the first and second links are arranged in parallel in the width direction of the chain belt, and the edge member extends over the plurality of links arranged in parallel. The chain belt according to claim 6, wherein the chain belt is a pin-shaped member.

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