Chain and chain guide plate

Patent metadata

Field	Value
Publication number	US-9803720-B2
Application number	US-201414552683-A
Country	US
Kind code	B2
Filing date	Nov 25, 2014
Priority date	Nov 29, 2013
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

The invention provides a chain and a chain guide plate that suppress occurrence of noise during chain traveling while attaining a reduction in costs and also attaining space saving. A chain includes first plate rows and second late rows. Each of the first plate rows includes a guide plate including a guide slide contact section for coming into slide contact with an inner side guide. The guide slide contact section extends in a chain longitudinal direction to be asymmetrical relative to an imaginary center line. During guiding by the inner side guide, lines drawn by the guide slide contact sections of a plurality of the guide plates are continuous in the chain longitudinal direction.

First claim

What is claimed is:

1. A chain configured by alternately arranging in a shifted position by a half pitch in a chain longitudinal direction first plate rows and second plate rows, the rows including a plurality of plates arranged in parallel in a chain width direction, with the rows being movably coupled to one another, wherein
each of the plate rows includes a plurality of inner plates and each of the second plate rows includes a plurality of inner plates,
each of the first plate rows includes a plurality of guide plates each including a pair of pin holes formed side by side in the chain longitudinal direction and a guide slide contact section for coming into slide contact with an inner side guide arranged on a chain bending inner circumferential side,
each guide slide contact section extends in the chain longitudinal direction asymmetrically relative to an imaginary center line extending in a chain height direction through a center between the pair of pin holes,
the plurality of guide plates in a first row of said first plate rows includes at least two guide plates having swelling sections forming part of the respective guide slide contact section that extend reversely from one another in the chain longitudinal direction, and the plurality of guide plates in a second row of said first plate rows also includes at least two guide plates having swelling sections forming part of the respective guide slide contact section that extend reversely from one another in the chain longitudinal direction, and
during guiding by the inner side guide, a collective longitudinal span of contact surfaces, extending in the chain longitudinal direction, of the guide slide contact sections of the plurality of the guide plates in the first row of said first plate rows extends at least to a collective longitudinal span of contact surfaces, extending in the chain longitudinal direction, of the guide slide contact sections of the plurality of the guide plates in the second row of said first plate rows that is adjacent said first row of said first plate rows, whereby a combined collective longitudinal span of the contact surfaces of said first row of said first plate rows and said second row of said first plate rows together are continuous in the chain longitudinal direction when viewed in the chain width direction facing said pin holes.

2. The chain according to claim 1 , wherein each row of the first plate rows includes at least two guide plates arranged in a state in which directions of the guide plates in the chain longitudinal direction are reversed each other.

3. The chain according to claim 1 , wherein the guide plates are arranged on both outer sides, in the chain width direction, of each row of the first plate rows.

4. The chain according to claim 1 , wherein the guide slide contact section includes a plurality of curved concave surface sections having different curvature radiuses.

5. The chain according to claim 1 , wherein
the guide slide contact section includes a curved concave surface section formed in a position crossing the imaginary center line, and
a curvature center of the curved concave surface section is located on the imaginary center line.

6. The chain according to claim 5 , wherein
the guide slide contact section further includes a second curved concave surface section formed adjacent to the curved concave surface section in the chain longitudinal direction, and
a curvature radius of the second curved concave surface section is larger than a curvature radius of the curved concave surface section.

Assignees

• Tsubakimoto Chain Co

Inventors

• Ishida Hiroki
• Sugasawa Shigenobu

Classifications

• F16G13/04 Primary

  Toothed chains · CPC title

• F16G13/08 Primary

  with links closely interposed on the joint pins (F16G13/04 takes precedence) · CPC title

• F16H7/18

  Means for guiding or supporting belts, ropes, or chains (construction of pulleys F16H55/36) · CPC title

• F16G15/00

  Chain couplings, Shackles; Chain joints; Chain links; Chain bushes (making chain elements B21L) · CPC title

• F16G13/07 Primary

  the links being of identical shape, e.g. cranked · CPC title