Abstract: An object of the present invention is to provide a bolt connector that enables a bolt to be inserted into a high nut, and is capable of easily maintaining a connection state between the bolt and the nut. The bolt connector connects two bolts and is configured by: a high nut that has a female screw portion; and a spring that is partially inserted into the female screw portion. The female screw portion is formed having a larger diameter than an outer diameter of the bolt. The spring is formed into a shape in which the spring is in contact with threads of the female screw portion and a male screw portion of the bolt, in a state in which the bolt or the high nut is rotated and fastened.

Abstract: An object of the present invention is to provide a bolt connector that enables a bolt to be inserted into a high nut, and is capable of easily maintaining a connection state between the bolt and the nut. The bolt connector connects two bolts and is configured by: a high nut that has a female screw portion; and a spring that is partially inserted into the female screw portion. The female screw portion is formed having a larger diameter than an outer diameter of the bolt. The spring is formed into a shape in which the spring is in contact with threads of the female screw portion and a male screw portion of the bolt, in a state in which the bolt or the high nut is rotated and fastened.

Abstract: The nut is configured by: a nut main body that includes a plurality of nut segment housing portions; a plurality of nut segments that are respectively housed in the nut segment housing portions of the nut main body: an urging means that is provided above the nut segments and urges the nut segments in a bottom surface direction of the nut main body; and a holding means that holds the nut segments and the urging means inside the nut main body. In the nut, a step is formed in a bottom surface of the nut segment housing portion such that screw portions formed on inner sides of the nut segments are continuous. In addition, a guide portion is formed in the nut segment housing portion, and a guide piece that is inserted into the guide portion and slides the nut segment only in a linear direction is provided in the nut segment.

Abstract: Reinforcing hardware for wooden housing is configured by: a strap nut that has a screw portion and a strap portion; a bolt that has a first screw portion that is screwed into the screw portion of the strap nut and a second screw portion on a side opposite the first screw portion; and a nut member that screws onto the second screw portion. A tool engaging portion into which a tip end portion of a tool is able to be inserted and by which the bolt is able to be rotated is formed on at least an end surface on the first screw portion side, and the second screw portion is formed as a screw that turns in a direction opposite the first screw portion.

Abstract: A coupling nut includes: a simple fastening nut housing case having bolt insertion holes for insertion, from end portions of the simple nut housing case, of bolts to be coupled, and, in sections of the housing case toward end portions thereof, simple fastening nut housing portions configured to non-rotatably house simple fastening nuts that screw together with the bolts inserted into the bolt insertion holes; and a simple fastening nut that is housed in each simple fastening nut housing portion of the housing case, provided with at least two or more nut segments that are biased by biasing springs, and configured to screw together with a screw portion of the inserted bolt when the housing case is rotated in a screwing direction after insertion of the bolts. One simple fastening nut has a left-hand thread and the other has a right-hand thread.

Abstract: A nail that is configured by: a nail main body composed of a soft iron material in which a head portion is formed in an upper end portion of a columnar body; and a tip end portion having a circular conical shape or a polygonal pyramidal shape that is formed in a lower end portion of the nail main body, in which the tip end portion is subjected to a tip end portion hardening treatment by quenching or plastic forging. The nail meets the Japanese Industrial Standards, is capable of being driven in a straight manner even when the tip end portion hits a hard knot, and is capable of being manufactured with relative ease.

Abstract: A coupling nut includes: a simple fastening nut housing case having bolt insertion holes for insertion, from end portions of the simple nut housing case, of bolts to be coupled, and, in sections of the housing case toward end portions thereof, simple fastening nut housing portions configured to non-rotatably house simple fastening nuts that screw together with the bolts inserted into the bolt insertion holes; and a simple fastening nut that is housed in each simple fastening nut housing portion of the housing case, provided with at least two or more nut segments that are biased by biasing springs, and configured to screw together with a screw portion of the inserted bolt when the housing case is rotated in a screwing direction after insertion of the bolts. One simple fastening nut has a left-hand thread and the other has a right-hand thread.

Abstract: A nail that is configured by: a nail main body composed of a soft iron material in which a head portion is formed in an upper end portion of a columnar body; and a tip end portion having a circular conical shape or a polygonal pyramidal shape that is formed in a lower end portion of the nail main body, in which the tip end portion is subjected to a tip end portion hardening treatment by quenching or plastic forging. The nail meets the Japanese Industrial Standards, is capable of being driven in a straight manner even when the tip end portion hits a hard knot, and is capable of being manufactured with relative ease.

Abstract: The present invention provides a fastening device that allows an attachment operation to be simply and easily performed even by a single person, is capable of fastening and fixing with certainty, and is capable of reducing cost. A fastening device is configured by: a bolt in which a right screw is formed on one end portion and a left screw is formed on another end portion; a jig engaging section that is formed on one end portion or both end portions of the bolt such as to be capable of being rotated using a jig that rotates the bolt; and a right screw nut and a left screw nut that respectively screw onto the right screw in the one end portion of the bolt and the left screw in the other end portion.

Abstract: A nut main body has a slanted hole with a smaller inner end portion having a plurality of stepped portions of differing height. This gives the slanted hole a differing depth relative to a large-diameter end portion of the slanted hole at a plurality of locations about a circumference of the slanted hole. A plurality of nut segments are slidable within the slanted hole and come into contact with at least one of the stepped portions. The nut segments have screw threads at an inner wall surface. A washer is provided at a large-diameter side of the plurality of nut segments. A bias spring is attached within the nut main body so as to urge the plurality of nut segments towards the small-diameter side of the nut main body with the washer therebetween. A stopper piece holds the bias spring within the nut main body.

Abstract: The present invention provides a fastening device that allows an attachment operation to be simply and easily performed even by a single person, is capable of fastening and fixing with certainty, and is capable of reducing cost. A fastening device is configured by: a bolt in which a right screw is formed on one end portion and a left screw is formed on another end portion; a jig engaging section that is formed on one end portion or both end portions of the bolt such as to be capable of being rotated using a jig that rotates the bolt; and a right screw nut and a left screw nut that respectively screw onto the right screw in the one end portion of the bolt and the left screw in the other end portion.

Abstract: A nut main body has a slanted hole with a smaller inner end portion having a plurality of stepped portions of differing height. This gives the slanted hole a differing depth relative to a large-diameter end portion of the slanted hole at a plurality of locations about a circumference of the slanted hole. A plurality of nut segments are slidable within the slanted hole and come into contact with at least one of the stepped portions. The nut segments have screw threads at an inner wall surface. A washer is provided at a large-diameter side of the plurality of nut segments. A bias spring is attached within the nut main body so as to urge the plurality of nut segments towards the small-diameter side of the nut main body with the washer therebetween. A stopper piece holds the bias spring within the nut main body.

Abstract: The present invention is configured by a wood screw main body, and a truncated cone-shaped washer that is rotatable in relation to a head of the wood screw main body such that a top surface of the head and a top surface of the truncated cone-shaped washer are substantially on the same plane, and attached so as not to detach from the head. When a retainer element is secured by the wood screw to a wood material to be supported, frictional heat can be prevented from occurring in the retainer element, and the retainer element can be secured by only the fastening force of the wood screw. The retainer element can be efficiently prevented from breaking, and attached such that the head of the wood screw and the surface of the retainer element are on the same plane.

Abstract: The present invention is configured by a wood screw main body, and a truncated cone-shaped washer that is rotatable in relation to a head of the wood screw main body such that a top surface of the head and a top surface of the truncated cone-shaped washer are substantially on the same plane, and attached so as not to detach from the head. When a retainer element is secured by the wood screw to a wood material to be supported, frictional heat can be prevented from occurring in the retainer element, and the retainer element can be secured by only the fastening force of the wood screw. The retainer element can be efficiently prevented from breaking, and attached such that the head of the wood screw and the surface of the retainer element are on the same plane.

Abstract: A method for manufacturing a corner fixing bracket has: a formation process of a tabular fixing bracket body which bends a generally central part to a predetermined angle; a formation process of plural pin-shaped nails which form plural pin-shaped nails by punching, in both ends parts except a central part of a fixing bracket body formed by said formation process of a fixing bracket body; and a bending process which bends a generally central part at 45 degrees or 90 degrees, after said formation process of plural pin-shaped nails.

Abstract: A nut having a nut body, a spring case, a washer, and a nut body urging spring. The nut body has received in it at least three or more nut segments and a nut segment urging spring, where the nut segments are, when rotated in the tightening direction after a bolt is inserted into the nut segments, screwed on to the thread of the bolt inserted. The spring case is attached at its upper end to the outer circumferential surface other than the upper part of the nut body so that the spring case is rotatable together with the nut body. The washer is rotatably attached to the lower part of the spring case. The urging spring is installed such that its one end received in the spring case is connected to the spring case or to the nut body and the other end to the washer, so that the urging spring can constantly urge the nut body in the tightening direction when the nut body is screwed on the bolt.

Abstract: A connecting bolt has: a screw rod which has threads in outer circumference part; a guidepost which is integrally formed so that the guidepost projects from a tip part of the screw rod, and which is the same outer diameter size as the root diameter of a thread, or is outer diameter size smaller than the root diameter of a thread; a shavings insertion hole which is formed in the guidepost and the screw rod; a tap part which is formed in a thread near the guidepost; a notch which is provided at least two or more, guides shavings into the shavings insertion hole, and is formed in the tap part and the guidepost; and a connecting means of the shape of a bolt or a nut which is integrally formed in the back end part of the screw rod. And the connecting bolt can attach to the pillar and the beam of a timber material easily, and the fixed state at the time of attachment is not visible from outside, and makes appearance beautiful.

Abstract: A nut having a nut body, a spring case, a washer, and a nut body urging spring. The nut body has received in it at least three or more nut segments and a nut segment urging spring, where the nut segments are, when rotated in the tightening direction after a bolt is inserted into the nut segments, screwed on to the thread of the bolt inserted. The spring case is attached at its upper end to the outer circumferential surface other than the upper part of the nut body so that the spring case is rotatable together with the nut body. The washer is rotatably attached to the lower part of the spring case. The urging spring is installed such that its one end received in the spring case is connected to the spring case or to the nut body and the other end to the washer, so that the urging spring can constantly urge the nut body in the tightening direction when the nut body is screwed on the bolt.

Abstract: The anchorage used at a corner part of woods includes a first anchorage including a first anchorage body; nails, punching on a long side plate of the first anchorage body; and nail insertion holes formed at the short side plate of the first anchorage body; and a second anchorage including a second anchorage body, forming via a bended part which overlaps with the short side plate of the first anchorage; nails, punching on a base plate of the second anchorage body; and nails formed in the shape of an overlapped pin, punching on an overlapped part of the second anchorage body so as to insert into the nail insertion holes of the first anchorage. Therefore, it can perform the attachment work easily; it can fix at the corner part by sufficient intensity; and it can attach to the corner part without forming a insertion hole for the bolt.

Abstract: A nut main body has a slanted hole with a smaller inner end portion having a plurality of stepped portions of differing height. This gives the slanted hole a differing depth relative to a large-diameter end portion of the slanted hole at a plurality of locations about a circumference of the slanted hole. A plurality of nut segments are slidable within the slanted hole and come into contact with at least one of the stepped portions. The nut segments have screw threads at an inner wall surface. A washer is provided at a large-diameter side of the plurality of nut segments. A bias spring is attached within the nut main body so as to urge the plurality of nut segments towards the small-diameter side of the nut main body with the washer therebetween. A stopper piece holds the bias spring within the nut main body.