Object hardness measuring device and method

Patent metadata

Field	Value
Publication number	US-11768141-B2
Application number	US-202217572972-A
Country	US
Kind code	B2
Filing date	Jan 11, 2022
Priority date	Jan 14, 2021
Publication date	Sep 26, 2023
Grant date	Sep 26, 2023

Abstract

An object hardness measuring device includes a first side portion, a second side portion, a pedestal unit, a load unit, a measuring unit, and a holding unit. The load unit applies a load to the measurement object. The measuring unit is able to measure, in a state where the load acts on the measurement object, at least one of a movement distance of the second side portion with respect to the first side portion and a change amount of the load when the second side portion is moved either at a predetermined speed or to a predetermined position. The holding unit is able to hold the measurement object, and is movable between the first side portion and the second side portion by the slide rail unit.

First claim

What is claimed is:

1. An object hardness measuring device for measuring hardness of a measurement object, the measuring device comprising:
a first side portion configured to press one side surface of the measurement object;
a second side portion configured to press a second side surface of the measurement object, the second side surface being disposed at an opposite end with respect to the one side surface of the measurement object;
a pedestal unit including a bottom plate and a slide rail assembly attached to a top surface of the bottom plate, the pedestal unit being movable on the second side portion with respect to the first side portion;
a load unit configured to apply a load to the measurement obj ect by moving the second side portion with respect to the first side portion the pedestal unit such that the first side portion presses the one side surface and the second side portion presses the second side surface;
a measuring unit configured to measure, in a state where the load acts on the measurement object, at least one of a movement distance of the second side portion with respect to the first side portion and a change amount of the load when the second side portion is moved either at a predetermined speed or to a predetermined position; and
a holding unit connected onto the slide rail assembly of the pedestal unit, wherein the holding unit is configured to hold the measurement object, and is movable by the slide rail assembly between the first side portion and the second side portion.

2. The object hardness measuring device according to claim 1 , wherein the first side portion includes a first protrusion, the first protrusion presses the one side surface of the measurement object, the second side portion includes a second protrusion, and the second protrusion presses the second side surface of the measurement object.

3. The object hardness measuring device according to claim 1 , wherein the holding unit includes a base portion and a protrusion protruding from the base portion, and a moving direction of the holding unit is parallel to a moving direction of the second side portion.

4. The object hardness measuring device according to claim 2 , wherein the first side portion includes a first side plate, the second side portion includes a second side plate, the first protrusion is attached to the first side plate in a positionally changeable manner, and the second protrusion is attached to the second side plate in a positionally changeable manner.

5. The object hardness measuring device according to claim 1 , wherein the measurement object is a catching tool for baseball or softball.

6. An object hardness measuring method for measuring hardness of a measurement object, the measuring method comprising:
moving a second side portion with respect to a first side portion by a pedestal unit including a bottom plate and a slide rail assembly attached to a top surface of the bottom plate such that the first side portion is in contact with one side surface of the measurement object and the second side portion is in contact with a second side surface of the measurement object, the second side surface being disposed at an opposite end with respect to the one side surface of the measurement object;
holding the measurement object by a holding unit connected onto the slide rail assembly of the pedestal unit;
moving the holding unit between the first side portion and the second side portion by the slide rail assembly; and
measuring a load acting on the measurement object by the first side portion and the second side portion when the second side portion is moved with respect to the first side portion such that the first side portion presses the one side surface and the second side portion presses the second side surface, and at least one of a movement distance of the second side portion with respect to the first side portion and a change amount of the load when the second side portion is moved either at a predetermined speed or to a predetermined position.

7. An object hardness measuring device for measuring hardness of a measurement object, the measuring device comprising:
a first side portion that presses one side surface of the measurement object;
a second side portion that presses a second side surface of the measurement object, the second side surface being disposed at an opposite end with respect to the one side surface of the measurement object;
a pedestal unit including a bottom plate and a slide assembly attached to a top surface of the bottom plate;
a load unit that applies a load to the measurement object by moving the second side portion with respect to the first side portion such that the first side portion presses the one side surface and the second side portion presses the second side surface;
a measuring unit that is able to measure, in a state where the load acts on the measurement object, at least one of a movement distance of the second side portion with respect to the first side portion and a change amount of the load when the second side portion is moved either at a predetermined speed or to a predetermined position; and a holding unit connected onto the slide assembly of the pedestal unit, wherein the holding unit is able to hold the measurement object, and is movable by the slide assembly between the first side portion and the second side portion.

8. The object hardness measuring device according to claim 7 , wherein the pedestal unit includes a rotation table, the rotation table rotates along the top surface of the bottom plate, and the holding unit is connected onto the slide assembly via the rotation table.

Assignees

• National Univ Corporation Tokai National Higher Education And Research System
• Mizuno Kk

Inventors

• Mouri Tetuya
• Ozeki Tomoe
• Yamada Yuki
• Kume Kazuhiro
• Kanda Akihiro
• Takita Kazuyuki

Classifications

• G01N3/48 Primary

  by performing impressions under impulsive load by indentors, e.g. falling ball (G01N3/54 takes precedence) · CPC title

• A63B71/143

  Baseball or hockey gloves · CPC title

• A63B2102/18

  Baseball, rounders or similar games · CPC title

• G01N2203/0078

  using indentation · CPC title

• G01N2203/04

  Chucks, fixtures, jaws, holders or anvils · CPC title