JP3470961B2 - Roller chain - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller chain and, more particularly, to a roller chain which has a better dustproof effect and a longer service life.

[0002]

2. Description of the Related Art Conventionally, this type of device is as follows.

In the structure of the conventional roller chain shown in FIG. 1, the roller chain is formed by connecting a plurality of chain units 90. Each chain unit 90 is composed of two outer plates 91, two shaft rods 92, two bushes 94 and two outer plates 91. A shaft hole 911 for drilling two shaft rods 92 is penetrated through the two outer plates 91, and a roller 93 and a bush 94 are fitted into the two shaft rods 92, so that two inner plates are provided. One roller chain is formed in 95 so that shaft holes 951 for drilling adjacent shaft rods 92 of different chain units 90 are perforated.

[0004]

The conventional roller chain thus formed is always used for transmitting power of mechanical devices. The roller chain is made of a metal material in order to enhance the rigidity and tensile strength in use. Further, in order to prevent metal corrosion or to operate smoothly, the roller chain is constantly lubricated.

However, when the roller chain coated with the lubricating oil is used by being exposed to nature for a long period of time,
Since the lubricating oil itself has tackiness, it rather collects and sticks fine particles or dust floating in the air. In this way, the minute particles or dust floating in the air enter the surface of the rod 92, the roller 93, and the bush 94 rotating together with the lubricating oil, so that not only the friction of the rotating surface is increased, but also Since the phenomenon of friction continues to exist, there is a problem that the roller chain is broken.

Further, since such a conventional roller chain is arranged between both transmission wheels with an accurate size and length, it is possible to obtain a smooth transmission power by the roller chain having an appropriate slack. It is a translation. Each chain unit 9
The outer plate 91, the inner plate 95 between 0 and the axial rod 92, the roller 93, and the bush 94 pivotally attached to the outer plate 91 and the inner plate 95, as their mutual pulling and friction phenomena become more intense,
The lubricating oil present on the surface to which the friction is applied is exuded by the tension and the friction. Further, since the lubricating oil belongs to the liquid and has volatility, the lubricating oil exuded by the above-mentioned tension and friction is gradually volatilized and disappears, whereby it becomes impossible to return to the surface to which friction is applied, Since the damage caused by the friction on the surface to which the friction is applied becomes more severe, there is a problem that the service life of the roller chain is further shortened.

Further, when the conventional roller chain is used, all the points which bear the forces of the outer plate 91 and the inner plate 95 are concentrated on the pivot points of the shaft holes 911, 951 and the shaft rod 92. Moreover, the outer plate 91 and the inner plate 9
Since the force of the roller 5 is formed into a shearing force, the outer plate 91 and the inner plate 95 of the roller chain tend to burst from the peripheral edge of the shaft holes 911 and 951 after a certain period of use, and the shaft rod is Since 92 is corroded and damaged by the outer plate 91 and the inner plate 95, there is a problem that the roller chain cannot be used.

The present invention has been made in view of the above problems, and a first object of the present invention is to project a protruding portion between the outer plate and the inner plate so as to cover each other. By doing so, it is possible to obtain a better dustproof effect and to provide a roller chain having an effect of better keeping the lubricating oil.

A second object of the present invention is that the outer tube and / or the inner plate of the roller chain are pivotally attached to the outer plate, the inner plate and the shaft rod, since the shaft tube is projectingly provided around the shaft hole of the outer plate and / or the inner plate. By forming the points in surface contact, the shearing force is diffused to provide a roller chain capable of suppressing damage to the roller chain.

[0010]

In order to achieve the above object, the roller chain according to the present invention is as follows.

That is, the roller chain of the present invention is formed by connecting a plurality of chain units, and the chain unit is composed of two outer plates, shaft rods and inner plates. Two shaft holes are formed through the two outer plates, and projecting portions projecting toward the other outer plate are provided along the edge of the outer plate. Axel is 2
A roller is fitted on the shaft rod pivotally mounted on the shaft holes of the outer plates and pivotally mounted between the two outer plates, and a bush is fitted on the shaft rod and the roller. . The inner plate is formed with two shaft holes, and the two shaft holes are used for pivotally attaching two adjacent shaft rods, respectively, and the shaft projecting toward the outer plate is provided on the periphery of the shaft hole. A pipe is provided so that the outer peripheral wall of the shaft pipe of the inner plate is accommodated inside the protrusion.

The roller chain of the present invention can also be constructed as follows. 1. The outer peripheral wall of the shaft tube of the inner plate abuts the inner peripheral wall of the protruding portion of the outer plate. 2. A roller chain is made by connecting a plurality of chain units. The chain unit consists of two outer plates,
It is composed of a rod and inner plate. Two protrusions are provided on the two outer plates, one shaft hole is formed in each of the two protrusions, the inside of the protrusion is formed hollow, and the root has an annular shape. The protruding portion is provided so as to protrude, and the protruding portion protruding toward the other outer plate is provided along the edge of the outer plate. The shaft rod is pivotally attached to the shaft holes of the two outer plates, and the shaft rod pivotally mounted between the two outer plates is fitted with a roller, and the bush is provided between the shaft rod and the roller. It is fitted. The inner plate is formed with two shaft holes, and the two shaft holes are used for pivotally attaching two adjacent shaft rods, respectively, and the shaft projecting toward the outer plate is provided on the periphery of the shaft hole. A tube is projected and the axial tube of the inner plate is housed inside the ridge of the outer plate. 3. The outer peripheral wall of the shaft tube of the inner plate abuts the inner peripheral wall of the raised portion and the protruding portion of the outer plate. 4. A roller chain is made by connecting a plurality of chain units. The chain unit consists of two outer plates,
It is composed of a rod and inner plate. Two shaft holes are formed in the two outer plates, and a shaft tube protruding toward the other outer plate is provided along the peripheral edge of the shaft holes. The shaft rod is pivotally attached to the shaft holes and the shaft tube of the two outer plates, and the shaft rod pivotally mounted between the two outer plates is fitted with a roller, and the shaft rod and the roller are mounted between the shaft rod and the roller. The bush is fitted. The inner plate is formed with two shaft holes, and the two shaft holes are used for pivotally attaching two adjacent shaft rods, respectively, and the shaft projecting toward the outer plate is provided on the periphery of the shaft hole. The tube is projected, and the inner peripheral wall of the shaft tube of the inner plate is used to accommodate the shaft tube of the outer plate. 5. The inner peripheral wall of the shaft tube of the inner plate abuts the outer peripheral wall of the shaft tube of the outer plate. 6. A roller chain is made by connecting a plurality of chain units. The chain unit consists of two outer plates,
It is composed of a rod and inner plate. Two shaft holes are formed in the two outer plates, and a shaft tube protruding toward the other outer plate is provided along the peripheral edge of the shaft holes. The shaft rod is pivotally attached to the shaft holes and the shaft tube of the two outer plates, and the shaft rod pivotally mounted between the two outer plates is fitted with a roller, and the shaft rod and the roller are mounted between the shaft rod and the roller. The bush is fitted. Two shaft holes are formed in the inner plate, and the two shaft holes are used to pivotally connect the two adjacent shaft rods. A shaft tube projecting from the shaft is projectingly provided, and an inner peripheral wall of the shaft tube of the inner plate is used to house the shaft tube of the outer plate. 7. The inner peripheral wall of the shaft tube of the inner plate abuts the outer peripheral wall of the shaft tube of the outer plate. 8. A roller chain is made by connecting a plurality of chain units. The chain unit consists of two outer plates,
It is composed of a rod and inner plate. The two outer plates are provided with two shaft holes, and a shaft tube protruding toward the other outer plate is provided along the peripheral edge of the shaft holes and along the edge of the outer plate. A projecting portion projecting in the same direction as the projecting direction of the shaft tube is provided. The shaft rod is pivotally attached to the shaft holes and the shaft tube of the two outer plates, and the shaft rod pivotally mounted between the two outer plates is fitted with a roller, and the shaft rod and the roller are mounted between the shaft rod and the roller. The bush is fitted. The inner plate is formed with two shaft holes, and the two shaft holes are used for pivotally attaching two adjacent shaft rods, respectively, and the shaft projecting toward the outer plate is provided at the periphery of the shaft hole. A tube is projectingly provided, and the axial tube of the inner plate is used to accommodate the axial tube of the outer plate. 9. The inner peripheral wall of the shaft tube of the inner plate abuts the outer peripheral wall of the shaft tube of the outer plate. 10. The roller chain is formed by connecting a plurality of chain units, and the chain unit is composed of two outer plates, shaft rods, inner plates and two protection plates. Two shaft holes are bored through the two outer plates, the shaft rod is pivotally attached to the shaft holes of the two outer plates, and a roller is attached to the shaft rod pivotally mounted between the two outer plates. While being fitted, a bush is fitted between the shaft rod and the roller.
The inner plate is formed with two shaft holes, and the two shaft holes are used for pivotally attaching two adjacent shaft rods, respectively, and the shaft projecting toward the outer plate is provided at the periphery of the shaft hole. The pipe is projected. The thickness of the two protection plates is equal to or larger than the height of the inner tube axial tube protruding from the surface of the inner plate, and the two protection plates are formed with two through holes. The through hole is used to pivotally mount the shaft tube of the inner plate. 11. The outer peripheral wall of the shaft tube of the inner plate abuts the inner peripheral wall of the through hole of the protective plate.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

[0014]

[Embodiment 1] FIG. 2 is an exploded perspective view of a roller chain according to Embodiment 1 of the present invention. The roller chain is formed by connecting a plurality of chain units 1. Each chain unit 1
Is composed of members such as two outer plates 11, a shaft rod 12, rollers 13, bushes 14 and two inner plates 15.

The two outer plates 11 form the main plate of the chain unit 1. Two shaft holes 111 are formed in each of the outer plates 11, and the two outer plates 11 correspond to each other. 2 shaft rods 1 with 1 shaft hole 111
Two are pivoted in parallel. The outer plate 11 itself is provided with a protruding portion 112 protruding in the direction of the other outer plate 11, and the protruding portion 112 is formed on the protruding wall surface and is formed so as to surround the entire outer plate 11 periphery. Is preferred.

The shaft rod 12 has two outer plates 1 at both ends.
The shaft 1 is pivotally mounted in a shaft hole 111 which is pierced in 1 and is mounted on a shaft rod 12 which is pivotally mounted between two outer plates 11.
3 is fitted and the bush 14 is fitted between the rod 12 and the roller 13, so that the roller 13 can smoothly rotate on the rod 12.

The two inner plates 15 are used to pivotally connect the two chain units 1. The inner plates 15 are respectively provided with two shaft holes 151, and the outer plates are formed around the shaft holes 151. It is preferable that the shaft tube 152 protruding in the direction of 11 is provided so as to project, and the shaft tube 152 is formed on the protruding wall surface and surrounds the entire periphery of the shaft hole 151. The shaft rod 12 can be fitted and pivotally attached to the two shaft tubes 152, or one end of the bush 14 can be fitted to the two shaft tubes 152. Then, the bush 14 is again provided with two adjacent rods 12 connected to the two chain units 1, respectively. Further, it is preferable that the outer peripheral wall of the shaft tube 152 contacts the inner peripheral wall of the protruding portion 112 of the outer plate 11.

FIG. 3 is a front view of the assembled roller chain according to the first embodiment of the present invention and a sectional view of a local portion thereof. The roller chain is formed by pivotally attaching a plurality of chain units 1 by an inner plate 15. Is. A bush 14 and a roller 13 are fitted to the shaft rod 12, both ends of the roller 13 are formed between two inner plates 15, and both ends of the bush 14 are shaft tubes of the two inner plates 15. It is pivotally attached to 152. Further, since the outer peripheral wall of the shaft tube 152 of the inner plate 15 is fitted to the inner peripheral wall of the protruding portion 112 of the outer plate 11, the outer plate 11 and its protruding portion 112 are just the rollers 13, the bush 14 and the inner plate. By covering the shaft hole 151 of 15 with the effect of blocking, dust in the air or floating fine particles do not enter the gap between the roller 13, bush 14 and the shaft hole 151. The dustproof effect can be reached. Further, the lubricating oil stored in the gap between the roller 13, the bush 14 and the shaft hole 151 becomes hard to come into direct contact with the air, and it is possible to prevent the lubricating oil from volatilizing, thereby obtaining a better lubricating effect. can do.

Further, in this embodiment, the outer peripheral wall of the shaft tube 152 of the inner plate 15 and the inner peripheral wall of the protruding portion 112 of the outer plate 11 are in contact with each other, and the inner plate 15 is connected by the shaft tube 152 to the shaft rod 12 or. Since the roller chain can support and rotate the bush 14, the roller chain takes charge of the force by increasing the contact area between the outer plate 11, the shaft rod 12 and the inner plate 15 in the process of transmitting power. Are relatively dispersed, and the shearing force of the pivot point can be reduced, and the damage due to friction can be reduced, so that the service life of the roller chain can be extended.

[0020]

Second Embodiment FIG. 4 is an exploded perspective view of a roller chain according to a second embodiment of the present invention, in which a different shape is provided for the outer plate of the first embodiment.
The roller chain is formed by connecting a plurality of chain units 10. Each chain unit 10 is composed of members such as two outer plates 16, a shaft rod 12, rollers 13, bushes 14 and two inner plates 15. Since the shaft rod 12, the roller 13, the bush 14, and the two inner plates 15 are the same as those in the first embodiment, detailed description thereof will be omitted.

Two protrusions 161 are provided on each of the two outer plates 16, and shaft holes 162 are formed in each of the protrusions 161 to form two corresponding shafts of the two outer plates 16. Through the hole 162, the two rods 12 are pivotally mounted in parallel. The inside of the raised portion 161 is formed to be hollow, and an annular protruding portion 163 is provided at the root portion so as to project.
It is preferable that 63 is formed on the protruding wall surface and surrounds the periphery of the shaft hole 162.

FIG. 5 is a front view of a roller chain according to a second embodiment of the present invention in an assembled state and a sectional view of a part thereof. The roller chain is constructed by pivotally attaching a plurality of chain units 10 by an inner plate 15. Is. A bush 14 and a roller 13 are fitted to the shaft rod 12, and both ends of the roller 13 are 2
The bush 14 is formed to be located between the inner plates 15, and both ends of the bush 14 are pivotally attached to the shaft tubes 152 of the two inner plates 15. Further, since the outer peripheral wall of the shaft tube 152 of the inner plate 15 is housed just inside the raised portion 161 of the outer plate 16, the raised portion 161 of the outer plate 16 and its protruding portion 163 are just inside the roller 13 and the bush 14. Since the shaft hole 151 of the plate 15 is completely covered and the blocking effect is produced, dust in the air or fine particles floating in the air do not enter the gap between the roller 13, bush 14 and the shaft hole 151. So, the dustproof effect can be reached. Further, the roller 13, the bush 14, and the shaft hole 15
The lubricating oil stored in the gap 1 makes it difficult for the lubricating oil to come into direct contact with the air, and it is possible to prevent the lubricating oil from volatilizing, so that a better lubricating effect can be obtained.

Also, in this embodiment, the inner plate 15
The outer peripheral wall of the shaft tube 152 and the raised portion 161 of the outer plate 16
And the inner peripheral wall of the protrusion 163 of the roller chain can contact each other, and the inner plate 15 can rotate while supporting the shaft rod 12 or the bush 14 by the shaft tube 152, so that the roller chain transmits power. In the process of performing, the contact area of the outer plate 16, the rod 12 and the inner plate 15 increases, so that the points that bear the force are relatively dispersed, and the shearing force that the pivot point bears is reduced. In addition, since the damage due to friction can be reduced, the service life of the roller chain can be extended.

[0024]

[Third Embodiment] FIG. 6 is an exploded perspective view of a roller chain according to a third embodiment of the present invention. The roller chain is formed by connecting a plurality of chain units 2. Each chain unit 2
Is composed of members such as two outer plates 21, a rod 22, rollers 23, bushes 24 and two inner plates 25.

The two outer plates 21 form the main plate of the chain unit 2. Two shaft holes 211 are formed in each of the outer plates 21, and the two outer plates 21 correspond to each other. 2 shaft rods 2 with 1 shaft hole 211
Two are pivoted in parallel. The outer plate 21 itself has the other outer plate 21 along the periphery of the two shaft holes 211.
A shaft tube 212 projecting in the direction of is protruded, and the shaft tube 212 can support the rotation of the shaft rod 22, and
Further, it can be formed so as to have a covering effect.

The shaft rod 22 has two outer plates 2 by its both ends.
1 is pivotally attached to the inner peripheral wall of the shaft hole 211 and the shaft tube 212 having a covering effect, and the roller 23 is fitted to the shaft rod 22 and the shaft rod 22 and the roller 2 are attached.
Since the bush 24 is fitted between the rollers 3, the roller 23 can smoothly rotate on the shaft rod 22.

The two inner plates 25 are used to pivotally attach the two chain units 2, and the inner plates 25 are respectively provided with two shaft holes 251. It is preferable that the shaft tube 252 projecting in the direction of 21 is provided so as to project, and the shaft tube 252 is formed on the projecting wall surface and surrounds the entire periphery of the shaft hole 251. The shaft tube 212 of the outer plate 21 and one end of the bush 24 can be fitted into the two shaft tubes 252. Then, again, the bush 24 and the shaft tube 212 are provided with two adjacent shaft rods 22 connected to the two chain units 2. Further, it is preferable that the inner peripheral wall of the shaft tube 252 of the inner plate 25 is in contact with the outer peripheral wall of the shaft tube 212 of the outer plate 21.

FIG. 7 is a front view of a roller chain in an assembled state according to a third embodiment of the present invention and a sectional view of a part thereof. The roller chain is formed by pivotally attaching a plurality of chain units 2 by an inner plate 25. Is. A bush 24 and a roller 23 are fitted to the shaft rod 22, both ends of the roller 23 are formed between two inner plates 25, and both ends of the bush 24 are shaft tubes of the two inner plates 25. 252 is pivotally attached. Further, since the shaft tubes 212 and 252 of the outer plate 21 and the inner plate 25 are formed so as to be fitted to each other, the shaft tubes 212 and 2 of the outer plate 21 and the inner plate 25 are formed.
52 is just the roller 23, the bush 24 and the inner plate 2
By covering the shaft hole 251 of No. 5 with the blocking effect, dust in the air or floating fine particles does not enter the gap between the roller 23, the bush 24 and the shaft hole 251, and thus, The dustproof effect can be reached. Further, the lubricating oil stored in the gap between the roller 23, the bush 24 and the shaft hole 251 becomes hard to come into direct contact with the air, and it is possible to prevent the lubricating oil from volatilizing, thereby obtaining a better lubricating effect. can do.

Further, in the present embodiment, the inner peripheral wall of the shaft tube 252 of the inner plate 25 and the outer peripheral wall of the shaft tube 212 of the outer plate 21 can abut each other, and further, the shaft tube 212 of the outer plate 21 and the bush. Since the shaft rod 22 can be supported and rotated by 14, the roller chain is transmitted to the outer plate 21 and the shaft rod 2 in the process of transmitting power.
By increasing the area of contact between the inner plate 25 and the inner plate 25, the points that bear the force are relatively dispersed, and the shearing force that the pivot point bears can be reduced and the damage caused by friction can be reduced. Therefore, the service life of the roller chain can be extended.

[0030]

[Embodiment 4] FIG. 8 is an exploded perspective view of a roller chain according to Embodiment 4 of the present invention. The roller chain is formed by connecting a plurality of chain units 3. Each chain unit 3
Is composed of members such as two outer plates 31, a rod 32, rollers 33, bushes 34 and two inner plates 35.

Two shaft holes 311 are formed in each of the two outer plates 31, and two shaft rods 32 are arranged in parallel with each other by the corresponding two shaft holes 311 of the two outer plates 31. Be worn. The outer plate 31 itself has two shaft holes 3
A shaft tube 312 protruding in the direction of the other outer plate 31 is provided along the peripheral edge of the shaft 11, so that the shaft tube 312 can support the rotation of the rod 32, and further, the outer plate 31 itself. Can be formed to have a covering effect.

The shaft rod 32 has two outer plates 3 depending on both ends.
1 is pivotally attached to the inner peripheral wall of the shaft hole 311 and the shaft tube 312 which are perforated into the shaft 1, and the roller 33 is fitted on the shaft rod 32, and the bush 34 is fitted between the shaft rod 32 and the roller 33. Since it is provided, the roller 33 can smoothly rotate on the rod 32.

The two inner plates 35 are used for pivotally attaching the two chain units 3, and each of the inner plates 35 has two shaft holes 351 formed therethrough. It is preferable that a shaft tube 352 protruding in the direction of the inner plate 35 is provided so as to project, and the shaft tube 352 is formed on the protruding wall surface and surrounds the entire periphery of the shaft hole 351. The shaft tube 3 of the outer plate 31 is attached to the two shaft tubes 352.
12 and one end of the bush 34 can be fitted (one end of the bush 34 need not be fitted). Then, the bush 34 and the inner peripheral wall of the shaft tube 312 are again provided with the shaft rod 32 connected to the two chain units 3. Further, it is preferable that the inner peripheral wall of the shaft tube 352 of the inner plate 35 is in contact with the outer peripheral wall of the shaft tube 312 of the outer plate 31.

FIG. 9 is a front view and a partial sectional view of an assembled state of a roller chain according to a fourth embodiment of the present invention. The roller chain is formed by pivotally attaching a plurality of chain units 3 by an inner plate 35. Is. A bush 34 and a roller 33 are fitted to the shaft rod 32, and both ends of the roller 33 are formed so as to be located between the two inner plates 35, and both ends of the bush 34 are shaft tubes of the two inner plates 35. 352 is pivotally attached. Further, since the shaft tube 312 of the outer plate 31 is formed so as to fit with the shaft tube 352 of the inner plate 35, the outer plate 31 exactly covers the shaft hole 351 and the bush 34 of the inner plate 35, and The shaft tube 352 of the inner plate 35 covers the separation line between the roller 33 and the bush 34, and the blocking effect is generated, so that dust in the air or fine particles floating in the air are transferred to the roller 33, the bush 34, and the shaft hole 351. In this way, the effect of dust protection can be reached without entering the gap of. Further, the lubricating oil stored in the gap between the roller 33, the bush 34 and the shaft hole 351 becomes hard to come into direct contact with the air, and it is possible to prevent the lubricating oil from volatilizing, so that a better lubricating effect is obtained. can do.

Further, in this embodiment, the inner peripheral wall of the shaft tube 352 of the inner plate 35 and the outer peripheral wall of the shaft tube 312 of the outer plate 31 can abut against each other, and further, the shaft tube 312 of the outer plate 31 and the bush. Since the shaft rod 32 can be supported and rotated by the roller 34, the roller chain is in the process of transmitting power, the outer plate 31 and the shaft rod 3
By increasing the area of contact between the inner plate 35 and the inner plate 35, the points that bear the force are relatively dispersed, and the shearing force that the pivot point bears can be reduced and the damage caused by friction can be reduced. Therefore, the service life of the roller chain can be extended.

[0036]

[Fifth Embodiment] FIG. 10 is an exploded perspective view of a roller chain according to a fifth embodiment of the present invention. The roller chain is formed by connecting a plurality of chain units 4. Each chain unit 4 is composed of members such as two outer plates 41, shaft rods 42, rollers 43, bushes 44 and two inner plates 45.

Two shaft holes 411 are formed in each of the two outer plates 41, and the two shaft holes 411 of the two outer plates 41 correspond to each other so that the two shaft rods 42 are pivoted in parallel with each other. Be worn. The outer plate 41 itself is provided with a projecting portion 412 and a shaft tube 413 projecting in the direction of the other outer plate 41. The projecting portion 412 is formed on the projecting wall surface and surrounds the entire outer plate 41. It is more preferable to form it. The shaft tube 413 is formed so as to project from the peripheral edges of the two shaft holes 411 toward the other outer plate 41, and the shaft tube 412 can support the rotation of the shaft rod 42.

The shaft rod 42 has two outer plates 4 by both ends.
1 is pivotally attached to the shaft tube 413, and the roller 43 is fitted on the shaft rod 42, and the bush 44 is fitted between the shaft rod 42 and the roller 43. Four
At 2, it can rotate smoothly.

The two inner plates 45 are used for pivotally attaching the two chain units 4, two shaft holes 451 are formed in each of the inner plates 45, and an outer plate is formed around the shaft holes 451. It is preferable that a shaft tube 452 projecting in the direction of 41 is provided so as to project, the shaft tube 452 is formed on a projecting wall surface and surrounds the entire periphery of the shaft hole 451. The shaft tube 413 of the outer plate 41 and one edge of the bush 44 can be fitted into the two shaft tubes 452 (both edges of the bush 44 need not be fitted). Then, again on the inner peripheral wall of the bush 44 and the shaft tube 413,
A shaft rod 42 connected to each chain unit 4 is bored. Further, it is preferable that the inner peripheral wall of the shaft tube 452 of the inner plate 45 contacts the outer peripheral wall of the shaft tube 413 of the outer plate 41.

FIG. 11 is a front view and a sectional view of a local portion of a roller chain according to a fifth embodiment of the present invention in an assembled state.
The roller chain is formed by pivotally attaching a plurality of chain units 4 by an inner plate 45. A bush 44 and a roller 43 are fitted on the shaft rod 42, and both ends of the roller 43 are 2
The bushes 44 are formed to be located between the inner plates 45, and both ends of the bush 44 are pivotally attached to the shaft tubes 452 of the two inner plates 45. Further, since the inner peripheral wall of the shaft tube 452 of the inner plate 45 is formed so as to fit with the outer peripheral wall of the shaft tube 413 of the outer plate 41, the protruding portion 412 of the outer plate 41 is exactly the bush 44 and the inner plate. 45 shaft hole 4
As a result of covering 51 with the effect of blocking, the dust in the air or floating fine particles does not enter the gap between the roller 43, the bush 44 and the shaft hole 451. Can be reached Further, the lubricating oil stored in the gap between the roller 43, the bush 44 and the shaft hole 451 becomes hard to come into direct contact with the air, and it is possible to prevent the lubricating oil from volatilizing, so that a better lubricating effect is obtained. can do.

Further, in this embodiment, the inner peripheral wall of the shaft tube 452 of the inner plate 45 and the outer peripheral wall of the shaft tube 413 of the outer plate 41 can abut each other, and further, the shaft tube 413 of the outer plate 41 and the bush. Since the shaft rod 42 can be supported and rotated by 44, the roller chain is transmitted to the outer plate 41 and the shaft rod 4 in the process of transmitting power.
By increasing the area of contact between the inner plate 45 and the inner plate 45, the points that bear the force are relatively dispersed, and the shearing force that the pivot point bears can be reduced and the damage caused by friction can be reduced. Therefore, the service life of the roller chain can be extended.

[0042]

[Sixth Embodiment] FIG. 12 is an exploded perspective view of a roller chain according to a sixth embodiment of the present invention. The roller chain is formed by connecting a plurality of chain units 5. Each chain unit 5 has two outer plates 51, shaft rods 52, rollers 53, bushes 54, two inner plates 55 and protection plates 5.
It is composed of members such as 6.

Two shaft holes 511 are formed in each of the two outer plates 51, and the two shaft holes 511 of the two outer plates 51 correspond to each other so that the two shaft rods 52 are pivoted in parallel. Be worn.

The shaft rod 52 has two outer plates 5 depending on both ends.
1 is pivotally attached to the shaft hole 511, and the roller 53 is fitted to the shaft rod 52, and the bush 54 is fitted between the shaft rod 52 and the roller 53. 5
At 2, it can rotate smoothly.

The two inner plates 55 are used for pivotally attaching the two chain units 5, and the inner plates 55 are respectively formed with two shaft holes 551, and the outer plates are formed around the shaft holes 551. It is preferable that a shaft tube 552 projecting in the direction of 51 is provided so as to project, and the shaft tube 552 is formed on the projecting wall surface and surrounds the entire periphery of the shaft hole 551. One of the ends of the rod 52 can be fitted into the two shaft tubes 552, or one end of the bush 54 can be fitted into the shaft tubes 552 as shown in the figure, and then again the bush 5 is inserted.
4 is provided with a shaft rod 52.

The protective plate 56 is fitted between the outer plate 51 and the inner plate 55, and two through holes 561 are formed in the protective plate 56, and the shaft tube 552 of the inner plate 55 is formed in the through hole 561. The thickness of the protection plate 56 itself is formed to be substantially the same as the height of the shaft tube 552 protruding from the surface of the inner plate 55.

FIG. 13 is a front view and a sectional view of a local portion of a roller chain according to a sixth embodiment of the present invention in an assembled state.
The roller chain is formed by pivotally attaching a plurality of chain units 5 by an inner plate 55. A bush 54 and a roller 53 are fitted on the shaft rod 52, and both ends of the roller 53 are 2
The bush 54 is formed so as to be located between the inner plates 55, and both ends of the bush 54 are pivotally attached to the shaft tubes 552 of the two inner plates 55. A protective plate 56 is fitted between the outer plate 51 and the inner plate 55,
Is fitted into the shaft tube 552 of the inner plate 55 through the through hole 561, so that the outer plate 51 and the protection plate 56 just cover the bush 54 and the shaft hole 551 of the inner plate 55, and the blocking effect is generated. Thus, the dust or the floating fine particles do not enter the gap between the roller 53, the bush 54 and the shaft hole 551, and thus the dustproof effect can be achieved. Further, the lubricating oil stored in the gap between the roller 53, the bush 54 and the shaft hole 551 becomes hard to come into direct contact with the air, and it is possible to prevent the lubricating oil from volatilizing, so that a better lubricating effect is obtained. can do.

Also, in this embodiment, the inner plate 55
The outer peripheral wall of the shaft tube 552 and the through hole 56 of the protective plate 56.
The peripheral wall of the outer plate 1 can contact each other, and further, the shaft hole 511 of the outer plate 51 and the shaft tube 5 of the inner plate 55
Since the roller rod 52 can support and rotate the shaft rod 52 by the bush 52 or the bush 54, the roller chain has an area where the outer plate 51, the shaft rod 52, the inner plate 55, and the protection plate 56 contact each other in the process of transmitting power. By increasing, the points that bear the force are relatively dispersed, and the shearing force that the pivot point bears can be reduced, and damage due to friction can be reduced, so the service life of the roller chain is reduced. It can be postponed.

[0049]

According to the roller chain of the first aspect of the present invention, the outer plate is provided with a protruding portion for covering the shaft tube of the inner plate. Further, according to the roller chain of the third aspect of the present invention, the outer plate is provided with the protrusion and the protrusion for covering the shaft tube of the inner plate. In addition, claim 5 of the present invention
According to the roller chain described in 7, the shaft tube of the outer plate is provided with a shaft tube protruding from the peripheral edge of the shaft hole, and the shaft tube of the outer plate is formed with the projection portion. It is fitted into the inner wall of the pipe. According to the roller chain of the ninth aspect of the present invention, a shaft tube is provided so as to project at the peripheral edge of the shaft hole of the outer plate, and a projecting portion is provided so as to project around the outer plate. The shaft tube of the plate is fitted between the outer peripheral wall of the shaft tube of the outer plate and the protrusion around the outer plate. Further, according to the roller chain of the present invention, the protective plate is fitted between the inner plate and the outer plate, and the thickness of the protective plate is a shaft tube protruding to the surface of the inner plate. Is formed to be the same as or larger than the height.

As described above, the pivot points of the shaft rod and the inner plate of each chain unit, or the pivot points of the shaft rod and the rollers and bushes fitted to the shaft rod, and the inner plate are all pivot points. Due to the good covering effect, the protrusion of each outer plate, the shaft tube or the protective plate can all prevent the ingress of dust or floating fine particles contained in the air. It is possible to avoid the phenomenon of damage due to friction caused by dust or small particles floating on the pivot point. In addition, since the lubricating oil stored at the pivot point is hard to come into direct contact with the air, the lubricating oil is less likely to volatilize, and dust or fine floating particles are not collected. Has the advantage that it can rotate more smoothly in the process of transmitting power.

According to the roller chain of the second aspect of the present invention, the outer peripheral wall of the shaft tube of the inner plate is formed so as to contact the inner peripheral wall of the protruding portion of the outer plate. Further, according to the roller chain described in claim 4 of the present invention, the shaft tube of the inner plate is formed so as to contact with the inner peripheral wall of the raised portion and the protruding portion of the outer plate. According to the roller chain of the sixth, eighth and tenth aspects of the present invention, the outer peripheral wall of the shaft tube of the outer plate is formed so as to contact the inner peripheral wall of the shaft tube of the inner plate. Further, according to the roller chain of the twelfth aspect of the present invention, the outer peripheral wall of the shaft tube of the inner plate is formed so as to contact the peripheral wall of the through hole of the protection plate. In this way, the outer plate and inner plate of each chain unit and the pivot points of the shaft rod are formed by surface contact, so that the area in contact with each other increases, so that the point that bears that force is relatively There is an advantage that the service life of the roller chain can be extended because the roller chain can be dispersed and the shearing force that the pivotal points take up can be reduced and the damage due to friction can be reduced.

The present invention may be embodied in other ways without departing from its spirit and essential characteristics. Therefore, the preferred embodiments described herein are illustrative and not limiting.

[Brief description of drawings]

FIG. 1 is a front view of a conventional roller chain and a sectional view of a local portion.

FIG. 2 is an exploded perspective view of the roller chain according to the first embodiment of the present invention.

FIG. 3 is a front view and a sectional view of a local portion of a roller chain according to a first embodiment of the present invention in an assembled state.

FIG. 4 is an exploded perspective view of a roller chain according to a second embodiment of the present invention.

FIG. 5 is a front view and a sectional view of a local portion of a roller chain according to a second embodiment of the present invention in an assembled state.

FIG. 6 is an exploded perspective view of a roller chain according to a third embodiment of the present invention.

FIG. 7 is a front view and a sectional view of a local portion of a roller chain according to a third embodiment of the present invention in an assembled state.

FIG. 8 is an exploded perspective view of a roller chain according to a fourth embodiment of the present invention.

FIG. 9 is a front view and a sectional view of a local portion of a roller chain according to a fourth embodiment of the present invention in an assembled state.

FIG. 10 is an exploded perspective view of a roller chain according to a fifth embodiment of the present invention.

FIG. 11 is a front view and a sectional view of a local portion of a roller chain according to a fifth embodiment of the present invention in an assembled state.

FIG. 12 is an exploded perspective view of a roller chain according to a sixth embodiment of the present invention.

FIG. 13 is a front view and a sectional view of a local portion of a roller chain according to a sixth embodiment of the present invention in an assembled state.

[Explanation of symbols]

1 Chain Unit 10 Chain Unit 11 Outer Plate 111 Shaft Hole 112 Projection 12 Shaft Rod 13 Roller 14 Bush 15 Inner Plate 151 Shaft Hole 152 Shaft Tube 16 Outer Plate 161 Ridge 162 Shaft Hole 163 Projection 2 Chain Unit 21 Outer Plate 211 Shaft hole 212 Shaft tube 22 Shaft rod 23 Roller 24 Bush 25 Inner plate 251 Shaft hole 252 Shaft tube 3 Chain unit 31 Outer plate 311 Shaft hole 312 Shaft tube 32 Shaft rod 33 Roller 34 Bush 35 Inner plate 351 Shaft hole 352 Shaft tube 4 Chain unit 41 Outer plate 411 Shaft hole 412 Projection 413 Shaft tube 42 Shaft rod 43 Roller 44 Bush 45 Inner plate 451 Shaft hole 452 Shaft tube 5 Chain unit 51 Outer plate 511 Shaft hole 52 Shaft rod 53 Roller 54 Bush 55 Inner plate 551 Shaft hole 55 Shaft tube 56 protective plate 561 through hole

Claims (10)

(57) [Claims] 1. A roller chain formed by connecting a plurality of chain units (1), wherein the chain unit (1) is 2
Two outer plates (11), which are composed of one outer plate (11), a rod (12) and an inner plate (15)
Two axial holes (111) are bored in the outer plate (11) along the edge of the outer plate (11).
A protrusion (112) protruding in the direction of the arrow, and the rod (12) is a shaft hole (111) of the two outer plates (11).
The roller (13) is fitted to the rod (12) pivotally mounted on the rod and pivotally mounted between the two outer plates (11), and between the rod (12) and the roller (13). The bush (1
4) is fitted, two shaft holes (151) are perforated in the inner plate (15), and the two shaft holes (151) are respectively pivotally attached to two adjacent shaft rods (12). A shaft tube (152) protruding toward the outer plate (11) is provided at the periphery of the shaft hole (151), and an outer peripheral wall of the shaft tube (151) of the inner plate (11) projects. Division (112)
A roller chain that is formed so as to be housed inside a roller chain. 2. The outer peripheral wall of the shaft tube (151) of the inner plate (15) is formed so as to contact the inner peripheral wall of the protrusion (112) of the outer plate (11). The described roller chain. 3. A roller chain formed by connecting a plurality of chain units (10), the chain unit (10)
Is constituted by two outer plates (16), a rod (12) and an inner plate (15), and two outer plates (1
6) two ridges (161) are provided in a protruding manner, one shaft hole (162) is formed in each of the two ridges (161), and the inside of the ridge (161) is hollow. At the same time, an annular protrusion (163) is provided on the root so that the other outer plate (1) extends along the edge of the outer plate (11).
A protrusion (112) protruding in the direction of (1) is provided so that the rod (12) has a shaft hole (11) of two outer plates (11).
A roller (13) is fitted to the rod (12) which is pivotally attached to 1) and is pivotally attached between two outer plates (11), and the rod (12) and the roller (13). A bush (14) is fitted between them, two shaft holes (151) are perforated in the inner plate (15), and the two shaft holes (151) respectively adjoin two adjacent shaft rods (151). 12) is used to pivotally mount, and a shaft tube (152) protruding toward the outer plate (11) is provided at the periphery of the shaft hole (151) so that the shaft tube (151) of the inner plate (11) is provided. ) Is formed so as to be housed inside the raised portion (161) of the outer plate (16). 4. The outer peripheral wall of the shaft tube (151) of the inner plate (15) is formed so as to come into contact with the inner peripheral walls of the raised portion (161) and the protruding portion (163) of the outer plate (16). The roller chain according to claim 3, which is characterized in that. 5. A roller chain formed by connecting a plurality of chain units (2), wherein the chain unit (2) comprises 2 units.
Two outer plates (21), each of which is composed of an outer plate (21), a rod (22) and an inner plate (25)
Two shaft holes (211) are pierced in the shaft hole (211), and a shaft tube (212) protruding toward the other outer plate (21) along the peripheral edge of the shaft hole (211) is projectingly provided. (2
2) is pivotally attached to the shaft holes (211) and the shaft tube (212) of the two outer plates (21), and to the shaft rod (22) pivotally mounted between the two outer plates (21). The roller (23) is fitted, the bush (24) is fitted between the shaft rod (22) and the roller (23), and the inner plate (25) is fitted with two.
Two shaft holes (251) are formed by penetrating one shaft hole (251).
Is used to pivotally attach two adjacent rods (22), and the outer plate (2) is attached to the periphery of the shaft hole (251).
A shaft tube (252) protruding in the direction of 1) is provided so as to project, and an inner peripheral wall of the shaft tube (252) of the inner plate (25) is used to house the shaft tube (212) of the outer plate (21). A roller chain characterized by that. 6. The inner peripheral wall of the shaft tube (252) of the inner plate (25) is formed so as to contact the outer peripheral wall of the shaft tube (212) of the outer plate (21).
The described roller chain. 7. A roller chain formed by connecting a plurality of chain units (4), wherein the chain unit (4) comprises 2 units.
Two outer plates (41), which are composed of the outer plate (41), the rod (42) and the inner plate (45)
Two shaft holes (411) are perforated in the shaft hole, and a shaft tube (413) protruding toward the other outer plate (41) along the peripheral edge of the shaft hole (411) is also provided. A projecting portion (412) projecting in the same direction as the projecting direction of the shaft tube (413) is provided along the edge of the outer plate (41), and the shaft rod (42) includes two outer plates (41). The shaft (42) is pivotally mounted on the shaft hole (411) and the shaft tube (412), and the roller (43) is fitted on the shaft rod (42) pivotally mounted between the two outer plates (41). A bush (44) is fitted between the rod (42) and the roller (43), two shaft holes (451) are formed in the inner plate (45), and two shaft holes (451) are formed. Two adjacent rods (4
2) used for pivoting, and a shaft tube (452) projecting toward the outer plate (41) at the periphery of the shaft hole (451).
And a shaft pipe (452) of the inner plate (45) is used to house the shaft pipe (413) of the outer plate (41). Claims inner circumferential wall of the shaft tube (452), characterized in that it is formed so as to be in contact with the outer peripheral wall of the shaft tube of the outer plates (41) (413) according to claim 8 in the plate (45) 7
The described roller chain. 9. A roller chain comprising a plurality of chain units (5) connected to each other, wherein the chain unit (5) comprises two units.
The two outer plates (51), the rod (52), the inner plate (55) and the two protection plates (56), and the two outer plates (51) have two shaft holes (51).
1) is pierced and the rod (52) has two outer plates (5
1) and the rod (52) pivotally mounted between the two outer plates (51) and the roller (5).
3) is fitted, and the rod (52) and the roller (5)
A bush (54) is fitted between the shafts 3), two shaft holes (551) are perforated in the inner plate (55), and the two shaft holes (551) are adjacent to each other. Rod (52)
Is used to pivotally attach the shaft tube (552) to the outer periphery of the shaft hole (551) in the direction of the outer plate (51), and the thickness of the two protection plates (56) is The axial tube (552) of the inner plate (55) is formed to have the same height as or a height higher than the surface of the inner plate (55) protruding, and the two protective plates (56) have two through holes ( 561) is penetrated, and the through hole (561) is used for pivotally attaching the shaft tube (552) of the inner plate (55). 10. A shaft tube (552) of an inner plate (55).
The roller chain according to claim 9 , wherein the outer peripheral wall of the roller chain is formed so as to contact the inner peripheral wall of the through hole (561) of the protection plate (56).