Dismounting method for fastening member, dismounting device for fastening member, attachment construction of fastening member and production system using the dismounting method for fastening member
AssigneeRicoh Company, Ltd.
InventorsRyosuke Yoshikawa, Yuichi Jibiki, Mitsuru Yasuda
Life of this patent
Estimating the term…
Abstract
The dismounting device includes, in order that a fastening member is dismounted from a base material, the fastening member comprising a head and a body, the body being inserted into a fastening hole formed in a base material, the head contacting a peripheral edge of the fastening hole into a fastened state with the body, a cutting member for cutting a boundary region between the head and the body from the head toward the body to separate the head from the body, the cutting member removing the fastening member from the base material.
Claims100
A dismounting method for a fastening member in which a fastening member is dismounted from a base material, the fastening member including a head and a body, the body being inserted into a fastening hole formed in the base material, the head contacting a peripheral edge of the fastening hole to assume a fastened state with the base material, said dismounting method comprising the steps of:
- a first cutting step of cutting a boundary region between the head and the body from the head toward the body, wherein the head has an axial hole at a center thereof, the axial hole extending in a direction toward the body, such that in said first cutting step, the axial hole acts as a cutting reference positioning portion to cut the boundary region;
- and
- a separating step of separating the head from the body, wherein the fastening member is removed from the base material.
A dismounting device for dismounting a fastening member from a base material, said fastening member including a head and a body, said body being inserted into a fastening hole formed in said base material, said head contacting a peripheral edge of said fastening hole to assume a fastened state with said base material, said dismounting device comprising:
- a cutting means for cutting a boundary region between said body and said head to separate said head from said body, wherein said cutting means includes a cylindrical portion and an inclined portion continuously formed in said cylindrical portion, said inclined portion having an extreme end with a diameter smaller than a diameter of said fastening hole and sized to cut said boundary region, and wherein said cutting means cuts said fastening member so that said inclined portion is superposed on a separating part where said body and said head are separated from each other in said boundary region.
A dismounting device for a fastening member, wherein said dismounting device separates said fastening member from a base material, said fastening member having been fastened to said base material by a body inserted into a fastening hole of said base material and a head, formed integrally with said body, having been placed in pressurized contact with a peripheral edge of said fastening hole, said dismounting device comprising:
- a cutting hole blade for cutting a boundary region between said body and said head in an axial direction of said body;
- a cutting force applying means for applying a cutting force to said boundary region to cut said boundary region via said cutting blade, said cutting force applying means having a cutting force urging means including a cutting force accumulating means for accumulating said cutting force applied to said cutting blade resulting in an accumulated cutting force and a cutting force releasing means for releasing said accumulated cutting force to thereby apply said accumulated cutting force to said cutting blade in a direction towards said fastening member;
- and
- wherein said cutting force urging means is for urging said accumulated cutting force to separate said body from said head via said cutting blade, when said accumulated cutting force reaches a predetermined amount.
A dismounting device for a fastening member, wherein said dismounting member dismounts said fastening member from a base material, said fastening member having a body integral with a head inserted into a fastening hole formed in said base material, said fastening member having an outer peripheral surface having a smaller diameter than a diameter of said fastening hole, said fastening member being substantially parallel to an outer peripheral surface of said body between said body and said head, and said head contacting a peripheral edge of said fastening hole to assume a fastened state with said base material, said dismounting device comprising:
- a cutting blade member being movable in an axial direction of said body with respect to a body cover, wherein said cutting blade member has a knife edge portion with a knife edge at an extreme end, a diameter of said knife edge being smaller than a diameter of said fastening hole, a diameter of said extreme end of said knife edge portion being smaller than an outside diameter of said body, and said knife edge being substantially a same size as a boundary region on an outer peripheral surface of said head at said extreme end of said knife edge portion to cut said boundary region;
- a cutting force applying member arranged within said body cover to apply a cutting force to said knife edge portion, said cutting blade member separating said body and said head of said fastening member from each other, and as a result, said fastening member, with said head removed therefrom, is dismounted from said base material;
- and
- a moving stroke, which moves said knife edge portion, is applied by said cutting force applying member to an extent that said extreme end extrudes said body, which has been separated from said fastening hole by said cutting blade member.
A dismounting device for dismounting a fastening member from a base material, said fastening member including a head and a body, said body being inserted into a fastening hole formed in said base material, said head contacting a peripheral edge of said fastening hole to assume a fastened state with said base material, said dismounting device comprising:
- a cutting member configured to cut a boundary region between said body and said head to separate said head from said body, wherein said cutting member includes a cylindrical portion and an inclined portion continuously formed in said cylindrical portion, said inclined portion having an extreme end with a diameter smaller than a diameter of said fastening hole and sized to cut said boundary region, and wherein said cutting member cuts said fastening member so that said inclined portion is superposed on a separating part where said body and said head are separated from each other in said boundary region.
A dismounting device for a fastening member, wherein said dismounting device separates said fastening member from a base material, said fastening member having been fastened to said base material by a body inserted into a fastening hole of said base material and a head, formed integrally with said body, having been placed in pressurized contact with a peripheral edge of said fastening hole, said dismounting device comprising:
- a cutting hole blade for cutting a boundary region between said body and said head in an axial direction of said body;
- a cutting force applying member configured to apply a cutting force to said boundary region to cut said boundary region via said cutting blade, said cutting force applying member having a cutting force urging means including a cutting force accumulating member configured to accumulate said cutting force applied to said cutting blade resulting in an accumulated cutting force and a cutting force releasing member configured to release said accumulated cutting force to thereby apply said accumulated cutting force to said cutting blade in a direction towards said fastening member;
- and
- wherein said cutting force urging member is for urging said accumulated cutting force to separate said body from said head via said cutting blade, when said accumulated cutting force reaches a predetermined amount.
A dismounting device for a fastening member, wherein said dismounting member dismounts said fastening member from a base material, said fastening member having a body integral with a head inserted into a fastening hole formed in said base material, said fastening member having an outer peripheral surface having a smaller diameter than a diameter of said fastening hole, said fastening member being substantially parallel to an outer peripheral surface of said body between said body and said head, and said head contacting a peripheral edge of said fastening hole to assume a fastened state with said base material, said dismounting device comprising:
- a cutting blade member being movable in an axial direction of said body with respect to a body cover, wherein said cutting blade member has a knife edge portion with a knife edge at an extreme end, a diameter of said knife edge being smaller than a diameter of said fastening hole, a diameter of said extreme end of said knife edge portion being smaller than an outside diameter of said body, and said knife edge being substantially a same size as a boundary region on an outer peripheral surface of said head at said extreme end of said knife edge portion to cut said boundary region;
- a cutting force applying member arranged within said body cover to apply a cutting force to said knife edge portion, said cutting blade member configured to separate said body and said head of said fastening member from each other, and as a result, said fastening member, with said head removed therefrom, is dismounted from said base material;
- and
- a moving stroke, which moves said knife edge portion, is applied by said cutting force applying member to an extent that said extreme end extrudes said body, which has been separated from said fastening hole by said cutting blade member.
Dependencies are inferred from the claim text.