LIGHTNING-RESISTANT FASTENER, CAP, AND METHOD OF MOUNTING LIGHTNING-RESISTANT FASTENER
First Claim
1. A lightning-resistant fastener comprising:
- a fastener member, which is made of a conductive material, used for fastening a second member on the interior side of an airframe of an aircraft to a first member constituting the airframe; and
a cap, which is made of an insulating material, installed so as to cover the fastener member projecting to the interior side of the airframe, whereinthe fastener member comprises an engaging part in a portion projecting to the interior side of the airframe; and
the cap comprises an engaged part engaged with the engaging part of the fastener member in the central portion of the inner peripheral surface thereof, andthe cap is installed to the fastener member in a state in which the engaging part of the fastener member engages with the engaged part while a gap is provided between the cap and a portion of the fastener member other than the engaged part.
1 Assignment
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Accused Products
Abstract
There are provided a lightning-resistant fastener and a cap, which, while assuring sufficient insulation properties, provide improved workability and highly stable quality to thereby enable a reduction in the manufacturing cost of an airframe, and a method of mounting the lightning-resistant fastener. A hole 32 is formed in a cap 30, and a screw groove 32a is formed in the hole 32. The configuration enables the cap 30 to be reliably and easily positioned and installed on a fastener member 24 and reliably prevents the cap 30 from coming off after the installation thereof. This improves the workability to reduce the production cost while assuring sufficient insulation properties and enables the cap 30 to be installed with stable quality irrespective of workers. Preferably, the cap 30 is made of a resin in view of mass producibility, weight reduction, and the like.
40 Citations
14 Claims
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1. A lightning-resistant fastener comprising:
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a fastener member, which is made of a conductive material, used for fastening a second member on the interior side of an airframe of an aircraft to a first member constituting the airframe; and a cap, which is made of an insulating material, installed so as to cover the fastener member projecting to the interior side of the airframe, wherein the fastener member comprises an engaging part in a portion projecting to the interior side of the airframe; and the cap comprises an engaged part engaged with the engaging part of the fastener member in the central portion of the inner peripheral surface thereof, and the cap is installed to the fastener member in a state in which the engaging part of the fastener member engages with the engaged part while a gap is provided between the cap and a portion of the fastener member other than the engaged part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A cap installed to a front end of a fastener member which fastens a first member and a second member together, wherein
the cap is made of an insulating material and has an umbrella shape; - the cap comprises an engaged part on an inner peripheral surface of a top potion of the cap, the engaged part is engaged with an engaging part formed on the fastener member which penetrates the first member and the second member and projects on the second member side; and
the cap is installed to the fastener member in a state in which the engaging part of the fastener member engages with the engaged part while a gap is provided between the cap and a portion of the fastener member other than the engaged part.
- the cap comprises an engaged part on an inner peripheral surface of a top potion of the cap, the engaged part is engaged with an engaging part formed on the fastener member which penetrates the first member and the second member and projects on the second member side; and
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13. A method of mounting a lightning-resistant fastener, comprising the steps of:
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causing a fastener main body to penetrate through a first member constituting an airframe of an aircraft and a second member attached to the first member on the interior side of the airframe from an outer periphery side of the airframe in a state in which the first member and the second member are laid on each other;
installing a fixture to the fastener main body from the interior side of the airframe; andengaging an engaged part of a cap with the fastener main body projecting from the fixture on the inside of the airframe by causing the fastener main body to penetrate from the outer periphery side of the airframe. - View Dependent Claims (14)
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Specification