Log positioning apparatus专利检索-抓钩装置林业机械与工程专利检索查询-专利查询网

Log positioning apparatus

阅读：219发布：2023-03-18

专利汇可以提供Log positioning apparatus专利检索，专利查询，专利分析的服务。并且A positioning apparatus for aligning wood logs along a chosen axis in preparation for sawing or other processing in a plane perpendicular to the longitudinal log axis. A pair of transversely spaced grapples are used, each gripping the log securely. One set transversely centers the log with a minimal amount of lifting. The second set also transversely centers the log, and in addition locates the elevation of the log axis along a desired plane regardless of the amount or degree of taper in the log. The first set of grapples uses separate fixed pivotal axes, the second set uses a single grapple axis which is elevationally varied as a function of the degree of closing of the first set.，下面是Log positioning apparatus专利的具体信息内容。

权利要求

1. An apparatus for positioning the central longitudinal axis of a tapered longitudinal member relative to a preselected transverse plane, comprising: a rigid supporting framework; first grapple means movably mounted to said framework for closing upon and engaging the sides of the member and having contoured surfaces for transversely centering the longitudinal axis thereof relative to said framework; second grapple means movably mounted to said framework at a location longitudinally displaced from said first grapple means for closing upon And engaging the sides of the member and having contoured surfaces for transversely centering the longitudinal axis thereof relative to said framework while simultaneously vertically positioning the longitudinal axis at a transverse reference line across said second grapple means; and means interconnecting said first and second grapple means for elevationally positioning said second grapple means relative to said framework to thereby vary the elevation of the transverse reference line as a function of the degree of closing of said first grapple means in such fashion that the central longitudinal axis of said member when engaged by both of said first and second grapple means is perpendicular to the preselected transverse plane.

2. The apparatus as set out in claim 1 further comprising: first and second hydraulic cylinder assemblies respectively connected between said framework and said first and second grapple means for selectively closing said grapple means about an object.

3. An apparatus for positioning the central longitudinal axis of a log section relative to a vertical plane, comprising: a rigid supporting framework; a first pair of opposed upright grapple arms pivotally mounted to said framework about axes perpendicular to said plane, said first pair of grapples each having lower contoured log engaging surfaces which locate a log gripped thereby with its lowermost surface at a constant elevation; a second pair of opposed upright grapple arms pivotally mounted to said framework about a common axis perpendicular to said plane, said second pair of grapples each having contoured log engaging surfaces which locate a log gripped thereby with its central longitudinal axis intersecting a reference line across the grapple arms thereof; and a mechanical linkage joining at least one of said first pair of grapple arms and movably supporting said second pair of grapple arms relative to said framework, whereby the elevation of the reference line across said second pair of grapple arms varies responsive to pivotal movement of said first pair of grapple arms.

4. An apparatus as set out in claim 3 wherein said first pair of grapple arms are pivotally mounted to said framework about individual transversely spaced axes; said mechanical linkage comprising: a shaft fixed to one of said first pair of grapple arms and having its shaft axis located coaxially with the pivotal axis of said one arm; a crank fixed to and projecting radially outward from said shaft; and bearings pivotally mounting said second pair of grapple arms to said crank about an axis parallel to the shaft axis.

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Log positioning apparatus

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