The present invention provides a hammering assembly type fixing device for a shipyard, in which the lower end of a fixture is inserted into a fixing groove formed in a fixing plate (made of a rigid bottom such as steel, concrete, rock, etc.) and the upper end of the fixture is screwed to be coupled to a separate fastening element, such that a grating, a work foothold, etc. are fixed. The hammering assembly type fixing device for a shipyard according to the present invention is configured such that a protruding flange inclined downward is integrally formed with a fixture to form a single body at a portion where an upper end and a lower end of a fixture are connected to each other, and a packing ring is provided to be inserted into the lower end of the fixture in close contact with the protruding flange. As such, as the fixture is fixed to the fixing plate by the pressing from the hammering, the hammering assembly type fixing device has the characteristics of being resistant to lateral forces and preventing breakage of the lower end due to a primary fixing by the lower end and a secondary fixing by the protruding flange. Further, the pressing force of the protruding flange of a downwardly inclined structure, and the improved sealing property by the packing ring, and the excellent foreign substance blocking effect are obtained. Moreover, the manufacturing process of the fixture is simplified, thereby reducing the manufacturing cost. Especially, the hammering assembly type fixing device for a shipyard is applied to fix a grating installed in a shipyard, so that even in high salt conditions due to the inflow of seawater through various routes in shipbuilding processes, the fixing force of the fixture with respect to the fixing plate is maximized and the airtightness by the packing ring is improved, thereby preventing the occurrence of fine gaps between the fixing plate and the fixture. Therefore, the penetration of salt is blocked, thereby preventing the corrosion of the fixture and improving durability of the fixture.

The present invention provides a hammering assembly type fixing device for a shipyard, in which the lower end of a fixture is inserted into a fixing groove formed in a fixing plate (made of a rigid bottom such as steel, concrete, rock, etc.) and the upper end of the fixture is screwed to be coupled to a separate fastening element, such that a grating, a work foothold, etc. are fixed. The hammering assembly type fixing device for a shipyard according to the present invention is configured such that a protruding flange inclined downward is integrally formed with a fixture to form a single body at a portion where an upper end and a lower end of a fixture are connected to each other, and a packing ring is provided to be inserted into the lower end of the fixture in close contact with the protruding flange. As such, as the fixture is fixed to the fixing plate by the pressing from the hammering, the hammering assembly type fixing device has the characteristics of being resistant to lateral forces and preventing breakage of the lower end due to a primary fixing by the lower end and a secondary fixing by the protruding flange. Further, the pressing force of the protruding flange of a downwardly inclined structure, and the improved sealing property by the packing ring, and the excellent foreign substance blocking effect are obtained. Moreover, the manufacturing process of the fixture is simplified, thereby reducing the manufacturing cost. Especially, the hammering assembly type fixing device for a shipyard is applied to fix a grating installed in a shipyard, so that even in high salt conditions due to the inflow of seawater through various routes in shipbuilding processes, the fixing force of the fixture with respect to the fixing plate is maximized and the airtightness by the packing ring is improved, thereby preventing the occurrence of fine gaps between the fixing plate and the fixture. Therefore, the penetration of salt is blocked, thereby preventing the corrosion of the fixture and improving durability of the fixture.

A connecting element, the use thereof and a method for connecting plate shaped workpieces are proposed. The connecting element comprises a multiplicity of closed encircling annular projections, which are arranged in such a way that the spacing between adjacent annular projections changes along a circumference or that adjacent annular projections are arranged parallel to one another or obliquely to the longitudinal axis. The connecting element is rotated and pressed into contact to produce a hole and, after the production of the hole, is subjected only to axial contact pressure and is then twisted to lock.

A connecting element, the use thereof and a method for connecting plate shaped workpieces are proposed. The connecting element comprises a multiplicity of closed encircling annular projections, which are arranged in such a way that the spacing between adjacent annular projections changes along a circumference or that adjacent annular projections are arranged parallel to one another or obliquely to the longitudinal axis. The connecting element is rotated and pressed into contact to produce a hole and, after the production of the hole, is subjected only to axial contact pressure and is then twisted to lock.

The present invention relates to a fastening element and a method for fastening guard elements on a substructure. In order to provide an improved fastening element for fastening guard elements, it is suggested within the scope of the invention that the fastening element consists of a shot-fire element and a collar screw connection, wherein the shot-fire element has a tip and a body with an external thread, and the collar screw connection has a blind hole with an internal thread that corresponds to the external thread of the shot-fire element, thereby enabling the shot-fire element to be connected to the collar screw connection. The guard elements, which have a circumferential collar, are placed on a substructure, in particular a steel structure such as a double-T beam, and subsequently anchored by means of fastening elements. For this purpose, the shot-fire element is fired into the substructure (steel substructure) by means of a stud gun such that the tip penetrates into the substructure. This results in a form-locked and captive connection between the shot-fire element and the substructure.

The present invention relates to a fastening element and a method for fastening guard elements on a substructure. In order to provide an improved fastening element for fastening guard elements, it is suggested within the scope of the invention that the fastening element consists of a shot-fire element and a collar screw connection, wherein the shot-fire element has a tip and a body with an external thread, and the collar screw connection has a blind hole with an internal thread that corresponds to the external thread of the shot-fire element, thereby enabling the shot-fire element to be connected to the collar screw connection. The guard elements, which have a circumferential collar, are placed on a substructure, in particular a steel structure such as a double-T beam, and subsequently anchored by means of fastening elements. For this purpose, the shot-fire element is fired into the substructure (steel substructure) by means of a stud gun such that the tip penetrates into the substructure. This results in a form-locked and captive connection between the shot-fire element and the substructure.

A construction nailing screw is configured to be used in like manner as traditional nails but rotate during driving through threading, providing retention of the construction nailing screw in the construction material(s), and the ability to be removed from the construction material(s) by reverse rotation. The construction nailing screw is characterized by a shank with a head on one longitudinal end, and a tip on another longitudinal end, with external threading that provides minimal friction during installation and mild resistance during removal, and two cutouts extending along the exterior of the shank and through the external threading. The head allows both a manual installation tool and an automatic installation tool to strike the head and drive (install) the nailing screw. The external threading has an upper side with a high pitch relative to the longitudinal axis of the shank, and a lower side with a low pitch relative to the longitudinal axis of the shank.

A construction nailing screw is configured to be used in like manner as traditional nails but rotate during driving through threading, providing retention of the construction nailing screw in the construction material(s), and the ability to be removed from the construction material(s) by reverse rotation. The construction nailing screw is characterized by a shank with a head on one longitudinal end, and a tip on another longitudinal end, with external threading that provides minimal friction during installation and mild resistance during removal, and two cutouts extending along the exterior of the shank and through the external threading. The head allows both a manual installation tool and an automatic installation tool to strike the head and drive (install) the nailing screw. The external threading has an upper side with a high pitch relative to the longitudinal axis of the shank, and a lower side with a low pitch relative to the longitudinal axis of the shank.

A bracket for attachment to an overhead substrate to carry a suspending wire or rod is formed from metal plate or strap stock having a bend connecting a first generally rectangular section of the stock with a second generally rectangular section of the stock. The first generally rectangular section of stock has a dimple formed on one side of the stock with a corresponding bulge protruding from the other side. The bulge protrudes alongside the second generally rectangular section of stock. The bulge has a base and an apex, a generally conical outside surface adjacent to the first generally rectangular section of stock and a through aperture at the apex. The bracket is applied with a tool that can be provided with a washer system to accommodate different fastener lengths and a safety to deactivate the triggering mechanism.

A bracket for attachment to an overhead substrate to carry a suspending wire or rod is formed from metal plate or strap stock having a bend connecting a first generally rectangular section of the stock with a second generally rectangular section of the stock. The first generally rectangular section of stock has a dimple formed on one side of the stock with a corresponding bulge protruding from the other side. The bulge protrudes alongside the second generally rectangular section of stock. The bulge has a base and an apex, a generally conical outside surface adjacent to the first generally rectangular section of stock and a through aperture at the apex. The bracket is applied with a tool that can be provided with a washer system to accommodate different fastener lengths and a safety to deactivate the triggering mechanism.