Locking washer and locking apparatus using the same

A locking washer comprising:

• an outer plate having a first end disposed in contact with a first construction element and a second end face disposed remote from the first construction element, said outer plate being formed with a bore extending therethrough;
• and
• an inner ring received in the bore of said outer plate, said inner ring having a first end face disposed close to the first construction element and a second end face disposed remote from the first construction element, said inner ring being formed with an axial bore which extends therethrough in a height direction of said inner ring, said axial bore permitting a shaft member to extend therethrough, said shaft member extending from the first construction member toward said washer, the bore of said outer plate and an outer shape of said inner ring being formed such that a force directed radially inwardly of the inner ring is applied from the outer plate to the inner ring when the outer plate is displaced along the shaft member in a direction away from the first construction element, said inner ring being so configured that a diameter of the axial bore decreases up to an outer diameter of said shaft member when the inner ring receives the force acting radially inwardly of said inner ring under a condition that said inner ring is fitted in said bore of said outer plate;
• wherein an engagement portion is formed at a vertical side of said outer plate close to the second end face of said outer plate, said engagement portion projecting from a bore-formed face of said outer plate radially inwardly of said bore, and said engagement portion being disposed for contact with the second end face of said inner ring disposed in said bore.

A locking washer comprising:

• an outer plate having a first end disposed in contact with a first construction element and a second end face disposed remote from the first construction element, said outer plate being formed with a bore extending therethrough;
• an inner ring received in the bore of said outer plate, said inner ring having a first end face disposed close to the first construction element and a second end face disposed remote from the first construction element, said inner ring being formed with an axial bore which extends therethrough in a height direction of said inner ring, said axial bore permitting a shaft member to extend therethrough, said shaft member extending from the first construction member toward said washer, the bore of said outer plate and an outer shape of said inner ring being formed such that a force directed radially inwardly of the inner ring is applied from the outer plate to the inner ring when the outer plate is displaced along the shaft member in a direction away from the first construction element, said inner ring being so configured that a diameter of the axial bore decreases up to an outer diameter of said shaft member when the inner ring receives the force acting radially inwardly of said inner ring under a condition that said inner ring is fitted in said bore of said outer plate;
• and
• an urging member made of a resilient material for urging the inner ring toward the outer plate, said urging member being accommodated in a recess formed in the outer plate, said recess opening to the second end face of said outer plate and communicating with the bore of said outer plate, and said urging member being in urged contact with the second end face of said inner ring when said urging member is disposed in the recess of said outer plate.

A locking washer comprising:

• an outer plate having a first end disposed in contact with a first construction element and a second end face disposed remote from the first construction element, said outer plate being formed with a bore extending therethrough;
• and
• an inner ring received in the bore of said outer plate, said inner ring having a first end face disposed close to the first construction element and a second end face disposed remote from the first construction element, said inner ring being formed with an axial bore which extends therethrough in a height direction of said inner ring, said axial bore permitting a shaft member to extend therethrough, said shaft member extending from the first construction member toward said washer, the bore of said outer plate and an outer shape of said inner ring being formed such that a force directed radially inwardly of the inner ring is applied from the outer plate to the inner ring when the outer plate is displaced along the shaft member in a direction away from the first construction element, said inner ring being so configured that a diameter of the axial bore decreases up to an outer diameter of said shaft member when the inner ring receives the force acting radially inwardly of said inner ring under a condition that said inner ring is fitted in said bore of said outer plate;
• wherein said outer plate is formed with an engagement element which perpendicularly projects from the first end face of said outer plate in a direction away from the second end face of said outer plate and which is adapted to be engaged with the first construction element;
• and
• wherein said outer plate is fixed to the first construction element when the engagement element is engaged with the first construction element.

A locking washer comprising:

• an outer plate having a first end disposed in contact with a first construction element and a second end face disposed remote from the first construction element, said outer plate being formed with a bore extending therethrough;
• and
• an inner ring received in the bore of said outer plate, said inner ring having a first end face disposed close to the first construction element and a second end face disposed remote from the first construction element, said inner ring being formed with an axial bore which extends therethrough in a height direction of said inner ring, said axial bore permitting a shaft member to extend therethrough, said shaft member extending from the first construction member toward said washer, the bore of said outer plate and an outer shape of said inner ring being formed such that a force directed radially inwardly of the inner ring is applied from the outer plate to the inner ring when the outer plate is displaced along the shaft member in a direction away from the first construction element, said inner ring being so configured that a diameter of the axial bore decreases up to an outer diameter of said shaft member when the inner ring receives the fore acting radially inwardly of said inner ring under a condition that said inner ring is fitted in said bore of said outer plate;
• wherein an insertion hole is formed at a portion of said outer plate located radially outwardly of the bore, said insertion hole extending through said outer plate in a height direction of said outer plate, and said insertion hole permitting an engagement element, which is adapted to be engaged with the first construction element, to pass therethrough;
• and
• wherein said outer plate is fixed to the first construction element when the engagement element is engaged with the first construction element.

A locking apparatus, comprising:

• an outer plate having a first end face disposed in contact with a first construction element and a second end face disposed remote from the first construction element, said outer plate being formed with a bore extending therethrough;
• an inner ring cooperating with said outer plate to form a locking washer, said inner ring being received in the bore of said outer plate, said inner ring having a first end face disposed close to the first construction element and a second end face disposed remote from the first construction element, said inner ring being formed with an axial bore which extends therethrough in a height direction of said inner ring, said axial bore permitting a shaft member to extend therethrough, said shaft member extending from the first construction member toward said washer, the bore of said outer plate and an outer shape of said inner ring being formed such that a force directed radially inwardly of the inner ring is applied from the outer plate to the inner ring when the outer plate is displaced along the shaft member in a direction away from the first construction element, said inner ring being so configured that a diameter of the axial bore decreases up to an outer diameter of said shaft member when the inner ring receives the force acting radially inwardly of said inner ring under a condition that said inner ring is fitted in said bore of said outer plate;
• and
• pressing means for causing said inner ring to be in urged contact with said outer plate, said pressing means including a fastening element which is coupled, on a side remote from the first construction element as viewed in a height direction of said locking apparatus, to said shaft member, and a resilient member which is disposed between the fastening element and said inner ring and which always urges said inner ring toward said outer plate.