Test device of universal nail/screw holding power

Patent metadata

Field	Value
Publication number	US-10260995-B2
Application number	US-201715807452-A
Country	US
Kind code	B2
Filing date	Nov 8, 2017
Priority date	Jun 28, 2017
Publication date	Apr 16, 2019
Grant date	Apr 16, 2019

Abstract

A test device of universal nail/screw holding power is provided. The device is capable of penetrating a nail/screw into a test piece at any angle and positioning the test piece on which a nail/screw is penetrated at any angle to test the nail/screw holding power. The device includes a base, two opposite supporting plates, two coaxial disks, an upper bearing plate, a lower bearing plate, a side bearing plate, a through groove, a trapezoid slot, and a plurality of trapezoid bolts on the same circumference. When the disk is turned, at least one trapezoid bolt is inserted into the trapezoid slot; when the at least one trapezoid bolt engages with the trapezoid slot and then is tightened up, the at least one trapezoid bolt and the trapezoid slot cooperatively limit the turn of the disk.

First claim

What is claimed is:

1. A test device of universal nail/screw holding power, comprising:
a base on which two opposite supporting plates are disposed, wherein two coaxial disks are respectively disposed on the two supporting plates, an upper bearing plate, a lower bearing plate, a side bearing plate located at one side of the upper bearing plate and the lower bearing plate are provided between the two disks, a through groove through which a nail/screw passes is provided on the upper bearing plate, a trapezoid slot which is concentric with the disk is provided on at least one supporting plate, and a plurality of trapezoid bolts are disposed along the same circumference on at least one disk; when the disk is turned, at least one trapezoid bolt is inserted into the trapezoid slot; when the at least one trapezoid bolt engages with the trapezoid slot and then is tightened up, the at least one trapezoid bolt and the trapezoid slot cooperatively limit the turn of the disk.

2. The test device of universal nail/screw holding power according to claim 1 , wherein a penetrating guiding apparatus is provided, comprising a left bottom plate disposed on the upper surface of the upper bearing plate, a left guiding plate rotatably connected with the left bottom plate through a left turning shaft, a right guiding plate rotatably connected with a right bottom plate through a right turning shaft, wherein the left turning shaft and the right turning shaft are parallel to each other and the left guiding plate and the right guiding plate are relative to each other; a nailing groove formed on a relative surface of the left guiding plate and the right guiding plate, and the nailing groove communicated with the through groove; the right bottom plate slidably connected with the left bottom plate in a direction vertical to the right turning shaft; a position giving slot, which extends in a direction vertical to the left turning shaft, disposed on the left guiding plate, and a connecting bolt, which passes through the position giving slot, connected with the right guiding plate through screw threads; when turning the connecting bolt, the right bottom plate being pushed to slide with respect to the left bottom plate so as to change a distance between the left guiding plate and the right guiding plate which are relative and parallel to each other; a turning angle fixed plate, which is vertical to the left turning shaft, fixed on the left bottom plate, and an arc-shaped turning guiding slot, which is coaxial with the left turning shaft, disposed on the turning angle fixed plate, and a turning angle adjusting bolt passing through the turning guiding slot to connect to the left guiding plate.

3. The test device of universal nail/screw holding power according to claim 2 , wherein the front and rear sides of an upper portion of the nailing groove are inclined planes and a width of the upper portion of the nailing groove is wide at top and narrow at bottom in the front-and-rear direction; two sliding blocks are oppositely and slidably disposed at the front and rear sides of the nailing groove; a front sliding slot and a rear sliding slot which are parallel to the front and rear sides of the nailing groove are disposed on the left guiding plate and the right guiding plate; a front sliding rod and a rear sliding rod respectively pass through a front sliding block, a front sliding slot, a rear sliding block and a rear sliding slot; the front sliding rod axially passes through a fore-and-aft gap controlling plate, the rear sliding rod axially passes through a lateral guiding slot disposed on the fore-and-aft gap controlling plate, and the lateral guiding slot parallelly extends along the axis of the left turning shaft; when the front sliding rod slides in the front sliding slot and the rear sliding rod slides in the rear sliding slot and the lateral guiding slot, a gap between the front sliding block and the rear sliding block changes.

4. The test device of universal nail/screw holding power according to claim 2 , wherein a lower protrusion protruding downwards is provided at the bottom of the right bottom plate, and the lower protrusion is slidably cooperated with a guiding groove disposed on the upper bearing plate in a direction vertical to the right turning shaft.

5. The test device of universal nail/screw holding power according to claim 2 , wherein a side protrusion extending forwards and backwards is respectively disposed at the front side and the rear side of the right bottom plate, and the side protrusion is slidably cooperated with a guiding sliding track disposed on the left bottom plate in a direction vertical to the right turning shaft.

6. The test device of universal nail/screw holding power according to claim 2 , wherein the turning angle fixed plate has graduation reflecting the turning angle of the left guiding plate.

7. The test device of universal nail/screw holding power according to claim 1 , wherein a plurality of connecting rods parallel to the axis of the disk are provided between the two disks, and the upper bearing plate, the lower bearing plate and the side bearing plate are fixed on the connecting rods.

8. The test device of universal nail/screw holding power according to claim 1 , wherein the two supporting plates are movably connected to the base in a direction parallel to the axis of the disk with respect to the base.

Assignees

• Univ Nanjing Forestry
• Univ Zhengzhou

Inventors

• Que Zeli
• Yang Xiaolin
• Teng Qicheng
• Lu Hongyi
• Wang Feibin
• Li Zherui
• Cai Weizhen

Classifications

• G01N2203/0016

  Tensile or compressive · CPC title

• G01M99/00 Primary

  Subject matter not provided for in other groups of this subclass · CPC title

• G01N3/08

  by applying steady tensile or compressive forces (G01N3/28 takes precedence) · CPC title

• G01L5/24

  for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed · CPC title

• G01M99/008 Primary

  by doing functionality tests · CPC title