JP5959482B2 - Chain guide and base member - Google Patents

Description

  The present invention relates to a chain guide provided with a guide shoe for slidingly guiding a traveling chain, a base member having a shoe support portion for supporting the guide shoe, and at least one attachment portion for attachment to an attachment target. And a base member for the chain guide.

  Conventionally, in order to stabilize a chain traveling between sprockets and properly maintain a tension, it is commonly used to use a chain guide provided with a guide shoe for slidingly guiding the traveling chain.

  For example, as shown in FIG. 19, there is an engine timing system for running a timing chain CH such as a roller chain suspended endlessly between sprockets S1 to S3 provided on each of a crankshaft and a camshaft in an engine room. The timing chain CH is suspended endlessly between a drive sprocket S1 attached to the crankshaft in the engine room and a pair of driven sprockets S2 and S3 attached to the camshaft. A timing system guided by a dynamic guide (G) and a chain guide (fixed guide) 900 is known.

  In this known timing system, as shown in FIG. 19, the chain guide (fixed guide) 900 is fixed in the engine room by two mounting shafts B1 and B2, and the chain guide (swing guide) G is swung. It is mounted in the engine room so as to be swingable in the suspension plane of the timing chain CH around the axis B0. The tensioner T presses a chain guide (swing guide) G to appropriately maintain the tension of the timing chain CH and suppress vibrations.

  As for the chain guide used in such a known timing system, it is desirable that the travel guide portion is made of a material that is low in friction and resistant to wear, and the whole is made up of a resin material that is low in friction. However, chain guides require a certain level of strength, rigidity, and durability in order to stably guide the chain against tension and vibration. When composed of resin materials only, the required strength, rigidity, and durability are required. Therefore, it is necessary to make the material thicker and larger, and the occupied space in the engine room becomes larger. Therefore, by forming the travel guide part with a low friction resin material and reinforcing the resin material with a material having high strength, rigidity, and durability such as metal, the strength, rigidity, The thing which made the occupation space small while ensuring durability is well-known (refer patent document 1 grade | etc.,).

  For example, as shown in FIGS. 20 and 21, a chain guide (fixed guide) 900 known from Patent Document 1 and the like is made of a resin-made guide shoe 910 that slides and guides a traveling chain, and the guide shoe 910 is chain-run. And a plate-shaped metal base member 920 that reinforces along the direction. The base member 920 includes a shoe support portion 921 extending in the chain traveling direction, and attachment portions 922 extending vertically at positions separated from the chain traveling direction, and two attachment portions 922 are respectively formed from an integral metal plate. The shoe support portion 921 is bent by 90 °.

  The two attachment portions 922 are provided with attachment holes 923 through which bolts and the like are inserted, respectively. The guide shoe 910 is reinforced by the travel guide portion 911 supported by the shoe support portion 921 of the base member 920, and is provided with a plurality of end locking pieces at both ends in the chain travel direction and appropriate portions in the width direction. The side locking pieces are configured to be fitted and removed by being locked to the shoe support portion 921.

JP-A-10-89428 Japanese Patent Laid-Open No. 10-267093

  In such a known chain guide, the base member 920 bends two portions of the integral metal plate by 90 ° along the longitudinal crease line, thereby forming the shoe support portion 921 and the two attachment portions 922. Therefore, there is a problem that a large processing force is required at the time of bending at two locations, and it is difficult to perform bending with high accuracy, and that the processing cost becomes high to perform bending with high accuracy. was there.

  Further, when the accuracy of the bending angle of the mounting portion 922 is poor, when the chain guide 900 is fixed to the engine block that is the mounting target, distortion occurs in the connecting portion between the shoe support portion 921 and the mounting portion 922. There is a risk that the bolt will loosen due to engine vibration or the like, and there is a risk of delayed fracture in the connecting portion where the distortion has occurred.

  Further, in the conventional chain guide, as shown in FIG. 22, the entire mounting portion 922 protrudes in the width direction from the shoe support portion 921 in a state in which the base member 920 is expanded on a plane, and the shoe support portion in the width direction. It is necessary to ensure a dimension obtained by adding the dimension L2 of the attachment portion 922 to the dimension L1 of 921 on the plate-like material. And as shown in FIG. 22, since the part R located next to the attachment part 922 in the longitudinal direction is difficult to use and becomes a part discarded as scrap, the yield is poor and the material cost is high. There was also a problem.

  Further, for example, in a chain guide known from Patent Document 2 or the like, the end portion (base end portion 2A) of the base member (lever base 2) is bent to form an attachment portion, so that the entire width direction of the base member is bent. Although it needs to be processed and is reduced compared to the case of bending 90 ° along the crease line in the longitudinal direction as in the known chain guide, it still requires a large processing force and bends with high accuracy. There was a problem that was difficult.

  Moreover, since the end part (base end part) of the base member (lever base) is bent to form an attachment part, a large amount of material is required, resulting in an increase in manufacturing cost.

  Further, in the chain guide known from Patent Document 2 or the like, the formation position of the attachment portion is limited to the end portion of the base member, and there is a problem that the design freedom of the formation position of the attachment portion is low.

  The present invention solves these problems, and can be manufactured with high accuracy without requiring high processing costs, reduces the material used and reduces the waste of the material at the time of punching. An object of the present invention is to provide a chain guide and a base member that can be reduced and have a high degree of design freedom in the formation position of the mounting portion.

  According to the first aspect of the present invention, there is provided a guide shoe for sliding and guiding a traveling chain, a base member having a shoe support portion for supporting the guide shoe, and at least one attachment portion for attachment to an attachment target. The base member is formed of a plate material made of a metal material, and has at least one divided piece portion divided in the width direction by a slit, and the mounting portion is the divided portion The said subject is solved by being formed by the one part.

In the invention according to claim 2, in addition to the structure of the chain guide according to claim 1, the attachment portion has the tubular hole portion formed by bending the tip of the divided piece portion, thereby It is a solution.
In the invention according to claim 3, in addition to the structure of the chain guide according to claim 1 or 2, the split piece is formed at a position outside the guide shoe supported by the shoe support. This solves the problem.
In the invention according to claim 4, in addition to the structure of the chain guide according to any one of claims 1 to 3, a plurality of the divided piece portions are formed in the width direction at the same position in the longitudinal direction. The above-mentioned problem is solved.
In addition to the structure of the base member according to any one of claims 1 to 4, the invention according to claim 5 solves the above-mentioned problem by providing a meat slime portion at the end point of the slit. It is.
According to the sixth aspect of the invention, in addition to the structure of the chain guide according to any one of the first to fifth aspects, the divided piece portion is provided with at least one end portion in the longitudinal direction of the base member as a starting point. The said subject is solved by dividing | segmenting into the width direction by the formed slit.
According to the seventh aspect of the invention, in addition to the structure of the chain guide according to any one of the first to fifth aspects, the split piece portion is a slit provided with an intermediate portion in the longitudinal direction of the base member as a starting point. The problem is solved by being divided in the width direction.
The invention according to claim 8 is a base member for a chain guide having a shoe support portion for supporting a guide shoe for slidingly guiding a traveling chain, wherein the base member is made of a metal material. And at least one divided piece section divided in the width direction by a slit, and the divided piece section forms an attachment portion for attachment to an attachment target, thereby solving the problem To do.

  According to the chain guide according to the first aspect and the base member according to the eighth aspect, the split piece portion of the base member divided in the width direction by the slit is bent in a plane orthogonal to the width direction. Since an attachment portion for attachment to an attachment target such as an engine block can be formed, a large working force is not required at the time of bending, and the bending can be performed with high accuracy.

  In addition, the base member (the state in which the base member is unfolded on the plane) before forming the attachment portion is manufactured by punching from a single metal plate because the divided piece portion does not protrude in the width direction from the shoe support portion. In doing so, there is little wasted material and manufacturing costs can be reduced.

  In addition, when the attachment portion is formed by bending the divided piece portion below the shoe support portion, the width of the base member (the state developed on the plane) before forming the attachment portion is set to support the guide shoe. It is possible to fit within the width of the material, and there is less waste of materials, and the manufacturing cost can be reduced.

  In addition, by forming the mounting portion using the divided piece portion of the base member divided in the width direction by the slit, the mounting portion can be formed inside the longitudinal direction of the base member. The position is not limited to the outer end in the longitudinal direction of the base member, the degree of freedom in design of the formation position of the attachment portion is improved, and the formation position of the attachment portion is determined according to the installation environment, the required performance of the tensioner, etc. be able to.

  In addition, by forming the attachment portion using the split piece portion of the base member divided in the width direction by the slit, the attachment portion exhibits elasticity, produces a damper effect, and can suppress generation of noise. .

According to the configuration of the second aspect of the present invention, the mounting portion has a tubular hole portion formed by bending the tip of the split piece portion, whereby the mounting hole through which a bolt or the like for mounting to the mounting target is inserted. It can be formed only by bending, and the shape and position can be easily changed according to the object to be attached, compared with the case of forming by punching or the like, and the manufacturing cost can be reduced. In addition, since the length of the attachment hole is a length corresponding to the width of the divided piece portion, stability when a bolt or the like is inserted into the attachment target and attached is improved. Further, by bending and rounding the tip of the split piece, interference with the peripheral members can be avoided.
According to the configuration of the third aspect of the invention, since the divided piece portion is formed at a position outside the guide shoe supported by the shoe support portion, the divided piece portion is bent upward (guide shoe side). A mounting portion can be formed, and the degree of freedom in design according to the mounting target is improved.
According to the configuration of the fourth aspect of the present invention, the plurality of divided piece portions are formed in the width direction at the same position in the longitudinal direction, thereby forming a plurality of attachment portions in parallel with the width direction and being substantially wide. Since it becomes possible to set it as the attachment part of a width | variety, stability when attaching to an attachment object further improves.
According to the configuration of the fifth aspect of the present invention, the stress concentration and strain applied to the slit end point when the split piece is bent are alleviated by providing the meat end portion at the end point of the slit. Thus, the strength of the base member can be maintained and the durability can be improved.
According to the configuration of the sixth aspect, the divided piece portion is bent in the width direction by the slit provided from at least one end portion in the longitudinal direction of the base member, so that the divided piece portion is bent. When the attachment part is formed, the width of the shoe support part near the end part becomes narrow and elastic deformation easily occurs. In addition, when the attachment portions are provided at both ends in the longitudinal direction of the base member, the force from the chain can be uniformly received by the entire base member.
According to the configuration of the seventh aspect, the split piece portion is divided in the width direction by the slit provided from the intermediate portion in the longitudinal direction of the base member, so that at the longitudinal end portion of the base member. The width of the shoe support part can be prevented from being narrowed, and when the split piece part is bent to form the mounting part, the width of the shoe support part at the center part becomes narrow and the base member is elastic as a whole. Since it becomes easy to deform | transform, it becomes possible to elastically support the traveling chain and absorb vibrations and shocks.

The perspective view which shows the chain guide which is 1st Embodiment seeing from the upper side. The perspective view which shows the chain guide which is 1st Embodiment seeing from a lower side. Explanatory drawing which shows the state which expand | deployed the base member in 1st Embodiment on the plane. The perspective view which shows the chain guide which is 2nd Embodiment seeing from the upper side. The perspective view which shows the chain guide which is 2nd Embodiment seeing from the lower side. The perspective view which shows the chain guide which is 3rd Embodiment seeing from an upper side. The perspective view which shows the chain guide which is 3rd Embodiment seeing from the lower side. The perspective view which shows the chain guide which is 4th Embodiment seeing from an upper side. The perspective view which shows the chain guide which is 4th Embodiment seeing from the lower side. Explanatory drawing which shows the state which expand | deployed the base member in 4th Embodiment on the plane. The perspective view which shows the chain guide which is 5th Embodiment seeing from an upper side. The perspective view which shows the chain guide which is 5th Embodiment seeing from the lower side. The perspective view which shows the chain guide which is 6th Embodiment seeing from an upper side. The perspective view which shows the chain guide which is 6th Embodiment seeing from the lower side. Explanatory drawing which shows the state which expand | deployed the base member in 6th Embodiment on the plane. The perspective view which shows the chain guide which is 7th Embodiment seeing from an upper side. The perspective view which shows the chain guide which is 7th Embodiment seeing from the lower side. Explanatory drawing which shows the modification of the chain guide of this invention. Explanatory drawing of the timing system of the conventional engine. The perspective view which shows the conventional chain guide seeing from the upper side. The perspective view which shows the conventional chain guide seeing from a lower side. Explanatory drawing which shows the state which expand | deployed the base member of the conventional chain guide on the plane.

  The present invention is a chain guide provided with a guide shoe for slidingly guiding a traveling chain, a base member having a shoe support portion for supporting the guide shoe, and at least one attachment portion for attachment to an attachment target. The base member is formed of a plate material made of a metal material and has at least one divided piece portion divided in the width direction by a slit, and the attachment portion is formed by the divided piece portion, resulting in high processing costs. It is possible to manufacture with high accuracy without the need for material, and it is possible to reduce the waste of materials when punching and reduce the manufacturing cost, and the degree of freedom in designing the mounting position is high. As long as there is any specific configuration, any configuration may be used.

For example, as the base member, a known appropriate metal material may be selected according to various conditions such as rigidity, durability, formability, and cost.
Further, as the material of the guide shoe, a known appropriate material may be selected according to various conditions such as friction resistance, rigidity, durability, moldability, cost, and the like, and a synthetic resin material is particularly preferable.
Further, in the embodiments described later, the chain guide is described as being configured as a fixed guide that is fixed to an attachment target. However, the chain guide is configured as a swing guide that is swingably fixed to the attachment target. May be.

  A chain guide 100 according to a first embodiment of the present invention will be described with reference to the drawings.

  The chain guide 100 is configured as a fixed guide fixed to an engine block (not shown) to be attached, and is applied to the known timing system described above.

  As shown in FIGS. 1 and 2, the chain guide 100 reinforces the guide shoe 110 that slides and guides the traveling chain, and improves the strength, rigidity, and durability by reinforcing the guide shoe 110 along the chain traveling direction. And a base member 120.

  As shown in FIG. 1, the guide shoe 110 has a travel guide portion 111 that extends in the chain travel direction, and is formed of a synthetic resin material. The guide shoe 110 is attached to the base member 120 by engaging its engaging piece with the base member 120.

  The base member 120 is made of a metal plate, and is formed in a predetermined curved shape along the chain traveling direction as shown in FIGS. 1 and 2, and includes a plate-like shoe support portion 121 that supports the guide shoe 110. Have.

  As shown in FIGS. 1 and 2, one slit 124 is formed at each longitudinal end of the base member 120. Each slit 124 extends in the chain travel direction from the longitudinal end of the base member 120 toward the inside. As shown in FIG. 3, a meat waste portion 126 is formed at the end point portion of the slit 124.

  As shown in FIGS. 1 and 2, the base member 120 is divided in the width direction by slits 124 at both ends in the longitudinal direction, and each divided piece portion 125 extends in a cantilever shape toward the outside in the longitudinal direction. Respectively. Each divided piece portion 125 is formed at a position outside the guide shoe 110 supported by the shoe support portion 121 at one side edge of the base member 120 in the width direction. At the tip of the divided piece portion 125, a tubular hole portion 123 that is bent and rounded at the tip is provided. The tubular hole 123 is for inserting a mounting shaft (not shown) such as a bolt, and the divided piece 125 having the tubular hole 123 is an attachment for attaching the chain guide 100 to the engine block. It functions as 122.

  In this embodiment, as shown in FIGS. 1 and 2, the attachment portion 122 is formed to extend to the front surface side on the upstream side in the chain traveling direction and to the back surface side on the downstream side. 1 to 3 are the upstream side in the chain travel direction, the left direction is the downstream side in the chain travel direction, the chain travel surface side of the travel guide 111 is the front side, and the opposite side is the back side.

  In the chain guide 100 of the first embodiment obtained in this way, the engine block or the like is obtained by bending the divided piece portion 125 of the base member 120 divided in the width direction by the slit 124 in a plane orthogonal to the width direction. Since the attachment portion 122 for attachment to the attachment object can be formed, a large working force is not required at the time of bending, and the bending can be performed with high accuracy.

  Further, as shown in FIG. 3, the base member 120 before the attachment portion 122 is formed (in a state where the mounting portion 122 is unfolded on the plane) is such that the split piece portion 125 does not protrude greatly from the shoe support portion 121 in the width direction. When manufacturing from a single metal plate by punching or the like, there is little waste of material and the manufacturing cost can be reduced.

  Further, the mounting portion 122 has a tubular hole portion 123 formed by bending the tip of the split piece portion 125, so that a mounting hole through which a bolt or the like for mounting to the engine block is inserted is formed only by bending. As compared with the case of forming by punching or the like, the shape and position according to the engine block can be easily changed, and the manufacturing cost can be reduced. Further, since the length of the attachment hole (tubular hole portion 123) is a length corresponding to the width of the divided piece portion 125, stability when a bolt or the like is inserted into the engine block and attached is improved. In addition, by bending and rounding the tip of the divided piece portion 125, interference with peripheral members can be avoided.

  In addition, by forming the attachment portion 122 using the divided piece portion 125 of the base member 120 divided in the width direction by the slit 124, the attachment portion 122 exhibits elasticity and produces a damper effect, thereby generating noise. Can be suppressed.

  In addition, since the divided piece portion 125 is formed at a position outside the guide shoe 110 supported by the shoe support portion 121, the divided piece portion 125 is bent upward (toward the guide shoe 110) to form the attachment portion 122. This increases the degree of freedom in design according to the engine block.

  Further, by providing the meat thin portion 126 at the end point portion of the slit 124, it becomes possible to alleviate stress concentration and distortion applied to the end point portion of the slit 124 when the split piece portion 125 is bent. The strength of the member 120 can be maintained and the durability can be improved.

  In addition, when the divided piece portion 125 is divided in the width direction by the slit 124 provided from the end in the longitudinal direction of the base member 120, the divided piece portion 125 is bent to form the attachment portion 122. In addition, since the width of the shoe support portion 121 in the vicinity of the end portion becomes narrower and is easily elastically deformed, it is possible to elastically support the vicinity of the end portion of the guide shoe 110 that is the most easily vibrating chain contact and release position. In addition, by providing the attachment portions 122 at both ends in the longitudinal direction of the base member 120, the force from the chain can be uniformly received by the entire base member 120.

  Next, the chain guide 200 which concerns on 2nd Embodiment of this invention is demonstrated based on FIG. 4 and FIG. Here, the second embodiment is exactly the same as the first embodiment described above except for a partial configuration. Therefore, by replacing the reference numerals in the 100s shown in the specification and drawings relating to the first embodiment with the reference numerals in the 200s, the description of the configuration other than the differences will be omitted.

  In the chain guide 200 according to the second embodiment of the present invention, as shown in FIGS. 4 and 5, the split piece portion 225 (attachment portion 222) is downward on both the upstream side and the downstream side in the chain traveling direction. It is formed to bend and extend to the back side. As a result, the width of the base member 220 (in a state where the mounting portion 222 is unfolded on the plane) before forming the attachment portion 222 can be accommodated within the width for supporting the guide shoe 210, and further, there is little waste of material and manufacturing. Cost can be reduced.

  Next, the chain guide 300 which concerns on 3rd Embodiment of this invention is demonstrated based on FIG. 6 and FIG. Here, the third embodiment is exactly the same as the first embodiment described above except for a partial configuration. Therefore, by replacing the reference numerals in the 100s shown in the specification and drawings relating to the first embodiment with the reference numerals in the 300s, the description of the configuration other than the differences will be omitted.

  In the chain guide 300 according to the third embodiment of the present invention, as shown in FIGS. 6 and 7, the split piece portion 325 (attachment portion 322) is upward on both the upstream side and the downstream side in the chain traveling direction. It is formed to bend and extend to the surface side.

  Next, the chain guide 400 which concerns on 4th Embodiment of this invention is demonstrated based on FIGS. Here, the fourth embodiment is the same as the first embodiment described above except for a partial configuration. Therefore, by replacing the reference numerals in the 100th series shown in the specification and drawings relating to the first embodiment with the reference numerals in the 400th series, explanations of configurations other than the differences will be omitted.

  In the chain guide 400 according to the fourth embodiment of the present invention, a T-shaped slit 424 is formed in the base member 420 as shown in FIGS. As shown in FIG. 10, the T-shaped slit 424 includes a traveling direction slit 424a extending along the chain traveling direction and a longitudinal center portion of the traveling direction slit 424a in the middle portion of the base member 420 in the longitudinal direction. To a side edge of the base member 420 in the width direction and a width direction slit 424b extending along the width direction. As shown in FIG. 10, meat sunk portions 426 are formed at both ends (both end points) of the width direction slit 424b.

  As shown in FIGS. 8 to 10, the base member 420 is divided in the width direction by the slits 424, and has two divided piece portions 425 extending in a cantilever shape toward the center side with an intermediate portion in the longitudinal direction as a support portion. have. As shown in FIGS. 8 and 9, each divided piece portion 425 is formed at a position outside the guide shoe 410 supported by the shoe support portion 421 on one side edge of the base member 420 in the width direction. A tubular hole 423 that is bent and rounded at the tip is provided at the tip of the split piece portion 425. The tubular hole portion 423 is for inserting an attachment shaft (not shown) such as a bolt, and the split piece portion 425 having the tubular hole portion 423 is an attachment portion for attaching the chain guide 400 to the engine block. It functions as 422.

  In the present embodiment, as shown in FIGS. 8 and 9, the attachment portion 422 is formed to extend to the front surface side on the upstream side in the chain traveling direction and to the back surface side on the downstream side. 8 and 9, the right direction is the upstream side in the chain traveling direction, the left direction is the downstream side in the chain traveling direction, the chain traveling surface side of the traveling guide portion 411 is the front side, and the opposite side is the back side. .

  In the chain guide 400 according to the fourth embodiment obtained in this way, in addition to the effects of the first embodiment, the split piece portion 425 is provided with a slit 424 provided with the middle portion in the longitudinal direction of the base member 420 as a starting point. Therefore, the width of the shoe support portion 421 can be avoided from being narrowed at the longitudinal end portion of the base member 420, and the attachment portion 422 can be bent by bending the divided piece portion 425. When formed, the width of the shoe support portion 421 at the center becomes narrow and the base member 420 is easily elastically deformed as a whole, so that the traveling chain can be elastically supported to absorb vibrations and shocks. It becomes.

  Next, the chain guide 500 which concerns on 5th Embodiment of this invention is demonstrated based on FIG. 11 and FIG. Here, the fifth embodiment is exactly the same as the fourth embodiment described above except for a partial configuration. Therefore, by replacing the reference numerals in the 400th series shown in the description and drawings relating to the fourth embodiment with the reference numerals in the 500th series, the description of the configuration other than the differences will be omitted.

  In the chain guide 500 according to the fifth embodiment of the present invention, as shown in FIGS. 11 and 12, the split piece portion 525 (attachment portion 522) is downward on both the upstream side and the downstream side in the chain traveling direction. It is formed to bend and extend to the back side. As a result, the width of the base member 520 (in a state where the mounting portion 522 is unfolded on the plane) before forming the attachment portion 522 can be accommodated within the width for supporting the guide shoe 510, and the material is not wasted. Cost can be reduced.

  Next, a chain guide 600 according to a sixth embodiment of the present invention will be described with reference to FIGS. Here, the sixth embodiment is exactly the same as the first embodiment described above except for a partial configuration. Therefore, by replacing the reference numerals in the 100s shown in the specification and drawings relating to the first embodiment with the reference numerals in the 600s, the description of the configuration other than the differences will be omitted.

  In the chain guide 600 according to the sixth embodiment of the present invention, as shown in FIGS. 13 to 15, two slits 624 are formed at both ends in the longitudinal direction of the base member 620. Each slit 624 starts from the longitudinal end of the base member 620 and extends inward along the chain travel direction. As shown in FIG. 15, a meat waste portion 626 is formed at the end point portion of the slit 624.

  As shown in FIGS. 13 to 15, the base member 620 has two divided piece portions 625 that are divided in the width direction by slits 624 at both ends in the longitudinal direction. As shown in FIGS. 13 to 15, each divided piece portion 625 is formed at a position outside the guide shoe 610 supported by the shoe support portion 621 on both side edges of the base member 620 in the width direction. A tubular hole 623 that is bent and rounded at the tip is provided at the tip of the split piece 625. The tubular hole 623 is for inserting a mounting shaft (not shown) such as a bolt, and the split piece 625 having the tubular hole 623 is an attachment for attaching the chain guide 600 to the engine block. It functions as 622.

  In this embodiment, as shown in FIGS. 13 and 14, the attachment portion 622 is formed to extend to the front surface side on the upstream side in the chain traveling direction and to the back surface side on the downstream side. 13 and 14, the right direction is the upstream side of the chain traveling direction, the left direction is the downstream side of the chain traveling direction, the chain traveling surface side of the traveling guide portion 611 is the front surface side, and the opposite surface is the back surface side. .

  In the chain guide 600 of the sixth embodiment obtained in this way, in addition to the effects of the first embodiment, a plurality of divided piece portions 625 are formed in the width direction at the same position in the longitudinal direction. Since a plurality of attachment portions 622 can be formed in parallel with the direction to make the attachment portions 622 substantially wide, the stability when attached to the engine block is further improved.

  Next, the chain guide 700 which concerns on 7th Embodiment of this invention is demonstrated based on FIG. 16 and FIG. Here, the seventh embodiment is the same as the above-described sixth embodiment except for a partial configuration. Therefore, by replacing the reference numerals in the 600th series shown in the specification and drawings relating to the sixth embodiment with the reference numerals in the 700th series, the description of the configuration other than the difference will be omitted.

  In the chain guide 700 according to the seventh embodiment of the present invention, as shown in FIGS. 16 and 17, the split piece portion 725 (attachment portion 722) is downward on both the upstream side and the downstream side in the chain traveling direction. It is formed to bend and extend to the back side. As a result, the width of the base member 720 (in a state where the mounting portion 722 is unfolded on the plane) before the mounting portion 722 is formed can be accommodated within the width for supporting the guide shoe 710, and the material is not wasted. Cost can be reduced.

Each embodiment described above is a specific example of the chain guide according to the present invention, but the chain guide according to the present invention is not limited thereto, and the shape, position, dimension, arrangement relationship, etc. of each component member Various modifications are possible, and the shapes of the constituent members of the respective embodiments may be appropriately combined.
For example, various embodiments other than the first to seventh embodiments described above can be considered for the formation position of the split piece portion (attachment portion). For example, as shown in FIG. Each end of the member 820 in the longitudinal direction is divided into three pieces in the width direction, and the middle piece of the three pieces at each end is used as the divided piece portion 825 (attachment portion 822), or FIG. ), The slit 824 divides the longitudinal intermediate portion of the base member into three pieces in the width direction, and uses the outer pieces of the three pieces as divided piece portions 825 (attachment portions 822). For example, as shown in FIG. 18 (c), the longitudinal intermediate portion of the base member is divided into three pieces by the slit 824 in the width direction, and the middle piece of the three pieces is divided into pieces 825 (attachment). Part 822) And the like. Moreover, what is necessary is just to determine arbitrarily also about the direction (front surface side or back surface side) which extends a division | segmentation piece part and forms an attachment part according to embodiment.
Moreover, although each above-mentioned embodiment is provided in the engine which has a timing system, it is not limited to this but is applicable to various apparatuses.
Further, the present invention is not limited to a chain transmission mechanism, and may be applied to a similar transmission mechanism such as a belt or a rope, and can be used in various industrial fields.
Further, the chain guide may be configured by arbitrarily combining the configurations of the first to seventh embodiments described above.

100, 200, 300, 400, 500, 600, 700, 900 ... Chain guide 110, 210, 310, 410, 510, 610, 710, 910 ... Guide shoes 111, 211, 311, 411, 511, 611, 711, 911 ... travel guide part 120, 220, 320, 420, 520, 620, 720, 920 ... base member 121, 221, 321, 421, 521, 621, 721, 921 ... shoe Support part 122, 222, 322, 422, 522, 622, 722, 922 ... Mounting part 123, 223, 323, 423, 523, 623, 723, 923 ... Tubular hole (attachment hole)
124, 224, 324, 424, 524, 624, 724 ... Slit 125, 225, 325, 425, 525, 625, 725 ... Divided piece part 126, 426, 626 ... Meat meat part CH ...・ Chain B0 ・ ・ ・ Oscillating shaft B1 ・ ・ ・ Mounting shaft B2 ・ ・ ・ Mounting shaft T ・ ・ ・ Tensioner
S1-S3 ... Sprocket

Claims (8)

A chain guide comprising a guide shoe for slidingly guiding a traveling chain, a base member having a shoe support portion for supporting the guide shoe, and at least one attachment portion for attachment to an attachment object,
The base member is formed of a plate material made of a metal material, and has at least one divided piece portion divided in the width direction by a slit,
The chain guide, wherein the attachment portion is formed by the divided piece portion.   The chain guide according to claim 1, wherein the attachment portion has a tubular hole portion formed by bending a tip of the divided piece portion.   The chain guide according to claim 1 or 2, wherein the divided piece portion is formed at a position outside the guide shoe supported by the shoe support portion.   The chain guide according to any one of claims 1 to 3, wherein a plurality of the divided pieces are formed in the width direction at the same position in the longitudinal direction.   The chain guide according to any one of claims 1 to 4, wherein a meat sunk portion is provided at an end point of the slit.   The said division | segmentation piece part is divided | segmented in the width direction by the slit provided from the at least one edge part of the longitudinal direction of the said base member as the starting point. Chain guide.   The chain guide according to any one of claims 1 to 5, wherein the divided piece portion is divided in a width direction by a slit provided with an intermediate portion in a longitudinal direction of the base member as a starting point. . A base member for a chain guide having a shoe support portion for supporting a guide shoe that slides and guides a traveling chain,
The base member is formed of a plate material made of a metal material, and has at least one divided piece portion divided in the width direction by a slit,
An attachment portion for attaching to an attachment object is formed by the divided piece portion.

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