An apparatus for measuring for measuring coefficient of restitution which is capable of reducing a mass effect and performing tests in free directions, is disclosed. The apparatus for measuring coefficient of restitution includes a holder for holding a spherical indenter, an ejection mechanism configured to eject the indenter held by the holder from the holder to a specimen, a speed measuring unit configured to measure an impact speed that is a speed of the indenter before the indenter impacts against the specimen, and a rebound speed that is a speed of the indenter after the indenter is rebounded from the specimen; and an arithmetic unit configured to calculate a coefficient of restitution that is a ratio of the rebound speed to the impact speed.

An apparatus for measuring for measuring coefficient of restitution which is capable of reducing a mass effect and performing tests in free directions, is disclosed. The apparatus for measuring coefficient of restitution includes a holder for holding a spherical indenter, an ejection mechanism configured to eject the indenter held by the holder from the holder to a specimen, a speed measuring unit configured to measure an impact speed that is a speed of the indenter before the indenter impacts against the specimen, and a rebound speed that is a speed of the indenter after the indenter is rebounded from the specimen; and an arithmetic unit configured to calculate a coefficient of restitution that is a ratio of the rebound speed to the impact speed.

An inspection method and an inspection apparatus capable of readily determining the necessity of replacement of a resin shock absorber at an elevator inspection location without using a car of a rated weight. First, an indenter is pressed into a resin shock absorber for an elevator. A load of pressing the indenter into the resin shock absorber is released. A physical property value indicative of a repulsive force that causes the indenter to bounce from the resin shock absorber by releasing the load is measured. The necessity of replacement of the resin shock absorber is determined by comparing a result of the physical property value obtained by measuring the repulsive force with a reference value prepared in advance.

An inspection method and an inspection apparatus capable of readily determining the necessity of replacement of a resin shock absorber at an elevator inspection location without using a car of a rated weight. First, an indenter is pressed into a resin shock absorber for an elevator. A load of pressing the indenter into the resin shock absorber is released. A physical property value indicative of a repulsive force that causes the indenter to bounce from the resin shock absorber by releasing the load is measured. The necessity of replacement of the resin shock absorber is determined by comparing a result of the physical property value obtained by measuring the repulsive force with a reference value prepared in advance.

An apparatus for measuring for measuring coefficient of restitution which is capable of reducing a mass effect and performing tests in free directions, is disclosed. The apparatus for measuring coefficient of restitution includes a holder for holding a spherical indenter, an ejection mechanism configured to eject the indenter held by the holder from the holder to a specimen, a speed measuring unit configured to measure an impact speed that is a speed of the indenter before the indenter impacts against the specimen, and a rebound speed that is a speed of the indenter after the indenter is rebounded from the specimen; and an arithmetic unit configured to calculate a coefficient of restitution that is a ratio of the rebound speed to the impact speed.

An apparatus for measuring for measuring coefficient of restitution which is capable of reducing a mass effect and performing tests in free directions, is disclosed. The apparatus for measuring coefficient of restitution includes a holder for holding a spherical indenter, an ejection mechanism configured to eject the indenter held by the holder from the holder to a specimen, a speed measuring unit configured to measure an impact speed that is a speed of the indenter before the indenter impacts against the specimen, and a rebound speed that is a speed of the indenter after the indenter is rebounded from the specimen; and an arithmetic unit configured to calculate a coefficient of restitution that is a ratio of the rebound speed to the impact speed.

A contact state observation apparatus of golf ball can observe the contact phenomenon between a golf ball and a golf club which has been conventionally hidden and unobservable. The contact state observation apparatus of golf ball includes: launching means for launching a golf ball 10; an impact plate 20 with which the launched golf ball 10 impacts; and imaging means 30, provided opposite to the launching means across the impact plate 20, for shooting an image of the contact state between the golf ball 10 and the impact plate 20 at the time of impact of the golf ball 10. The impact plate 20 has, in a part where the golf ball 10 impacts, an observation hole 21 whose area is smaller than a contact area with the golf ball, and the imaging means 30 shoots the image of the contact state through the observation hole 21.

The technology provides a device that measures an internal structural integrity and surface hardness of baseball bats having a bat clamp that secures the baseball bat at a handle end, a bat support that secures the baseball bat at a barrel end, and a rebound hammer that impacts the baseball bat to determine a coefficient of restitution value. The rebound hammer may indirectly impact the baseball bat through a force dispersing tool. The technology further provides a device that measures vibration propagation within baseball bats, having a bat clamp that secures the baseball bat at a handle end, a vibration sensor provided proximate to the handle end, and a vibration impact tool that impacts the baseball bat to transfer a force thereto.

The technology provides a device that measures an internal structural integrity and surface hardness of baseball bats having a bat clamp that secures the baseball bat at a handle end, a bat support that secures the baseball bat at a barrel end, and a rebound hammer that impacts the baseball bat to determine a coefficient of restitution value. The rebound hammer may indirectly impact the baseball bat through a force dispersing tool. The technology further provides a device that measures vibration propagation within baseball bats, having a bat clamp that secures the baseball bat at a handle end, a vibration sensor provided proximate to the handle end, and a vibration impact tool that impacts the baseball bat to transfer a force thereto.