JP5636607B2 - High nut locking connection method - Google Patents

Description

  The present invention relates to a high nut locking connection method in which a high nut is locked and connected to a fastening member having a male screw for connection.

  2. Description of the Related Art Conventionally, for example, there is a metal fitting provided with a female thread portion for connection at the rear end, such as a metal fitting for connecting a scaffold that connects a building and a scaffold. For example, Japanese Utility Model Laid-Open No. 3-80844 proposes a scaffolding bracket for a wooden house having a wood screw portion at the tip and a female screw portion for attaching a scaffold connection bolt to the head (Patent Document 1). ).

  Moreover, such a metal fitting is formed by screwing a high nut into a fastening member, or is integrally formed by forging or the like.

  For example, Japanese Utility Model Registration No. 3116993 proposes a bracket for connecting scaffolds in which a wood screw portion and a female screw portion are integrally formed of a metal forged product (Patent Document 2).

Japanese Utility Model Publication No. 3-80844 Utility Model Registration No. 3116993

  However, the metal fitting formed by conventional screwing has a problem that only the high nut is detached from the fastening member having the male screw when it is removed from the building after use, and the fastening member cannot be removed together.

  To solve this problem, there is a method of integrating the fastening member and the high nut by welding after screwing the high nut into the fastening member. However, there is a problem that skilled welding techniques, processing labor, and processing costs increase.

  Moreover, what was manufactured by integral formation like the invention described in patent document 2 needs to process an internal thread part separately in a high nut part, and processing cost will increase that the effort concerning formation of this internal thread part increases. There is a problem that is high. In addition, in forging, there is a problem that an expensive metal mold is required for each type of high nut and the size of the internal thread portion.

  The present invention has been made to solve such problems, and relates to a high nut that can be easily and inexpensively manufactured while maintaining the strength of an integrated type and having the convenience of removal after use. The purpose is to provide a stop connection method.

  The high nut locking and connecting method according to the present invention is a method of locking and connecting a high nut to a fastening member having a connecting male screw, wherein the outer peripheral surface of the shaft portion on which the connecting male screw is formed A locking shaft surface on which the male screw for connection is not formed is formed on the tip side of the screw, and the male screw for connection is inserted from one end of the high nut and screwed together, and the outer periphery of the high nut A connection that bulges and locks the inner peripheral surface of the high nut onto the locking shaft surface by pressing the outer peripheral surface of the surface corresponding to the locking shaft surface from two directions toward the center of the shaft. Is the method.

  According to the present invention, it can be manufactured easily and inexpensively while maintaining the strength of an integrated type and having the convenience of removal after use.

In the high nut locking and connecting method according to the present invention, it is a front state diagram showing an embodiment of a process of screwing a fastening member having a connecting male screw into a high nut. The longitudinal cross-sectional state figure which shows the process which the inner peripheral surface of the said high nut swells to the axial surface for a latching, and is locked by pressing the outer peripheral surface of the high nut of this embodiment toward an axial center from two directions. It is. It is a perspective view which shows the metal fitting with a high nut manufactured using the latching connection method of the high nut of this embodiment. It is a longitudinal cross-sectional view which shows the metal fitting with a high nut in this embodiment. Another embodiment of a fastening member and a high nut that are locked and connected by using the high nut locking and connecting method according to the present invention, wherein (a) the fitting includes a wood screw in the shape of the fastening member, (b) It is a front view which shows the metal fitting with which the shape of a fastening member has a tap screw shape for concrete, and (c) the shape of a fastening member is a bolt shape. The longitudinal cross-sectional state which shows the process which the inner peripheral surface of the said high nut bulges to the axial surface for a latching, and is locked by pressing the outer peripheral surface of the high nut of other embodiment toward an axial center from three directions FIG.

  Hereinafter, an embodiment of a high nut locking connection method according to the present invention will be described with reference to the drawings. In the present embodiment, a case where the present invention is applied to the manufacture of the metal fitting 1 with a high nut will be described as an example of a high nut locking connection method.

  In addition, this invention is not limited to what is used for manufacture of the metal fitting 1 with a high nut, It can apply to the method of latching and connecting the high nut 3 to the fastening member 2 which has the other various external thread 22 for a connection. .

  As shown in FIGS. 1 and 2, the high nut locking and connecting method of the present embodiment is such that the fastening member 2 having the connecting male screw 22 is screwed into the high nut 3 and then the outer peripheral surface of the high nut 3. This is a method in which the high nut 3 is locked and connected to the fastening member 2 by press-working 31 from two directions toward the shaft center to bulge the inner peripheral surface 32. An example of the metal fitting 1 with a high nut manufactured by this method is shown in the perspective view of FIG. 3 and the sectional view of FIG. As shown in FIGS. 1 and 4, the fastening member 2 in the present embodiment is a drill screw in which a fastening male screw 21 for fastening to an object to be fastened is formed on the front end side, and a high nut on the rear end side. 3 is formed.

  Further, a flange 23 for positioning the screwing depth of the high nut 3 is provided between the fastening male screw 21 and the connecting male screw 22 in the fastening member 2. The flange 23 has an outer diameter comparable to the diameter of the high nut 3, but is not limited to this and may be large or small.

  Further, on the outer peripheral surface of the shaft portion that contacts the flange 23 on the distal end side of the connecting male screw 22, a locking shaft surface 4 is formed on which the inner peripheral surface 32 where the high nut 3 bulges contacts and is locked. Yes. As shown in FIGS. 1 and 4, the outer diameter of the locking shaft surface 4 is formed to be smaller than the thread height of the connecting male screw 22, and the bulging portion of the high nut 3 corresponds to the connecting male screw 22. It is configured to be caught on the thread.

  Moreover, the said fastening member 2 can select suitably the front-end | tip shape in which the external thread 21 for fastening was formed according to the purpose of use. For example, the fastening member 2a when used for fastening a wooden pole or the like may have a wood screw shape as shown in FIG. Moreover, the fastening member 2b in the case of being used for fastening concrete may have a concrete tap screw shape as shown in FIG. 5 (b). Furthermore, the fastening member 2c in the case of being used as a connecting metal fitting that connects the metal fitting 1 with a high nut and the scaffold may be a bolt shape as shown in FIG.

  Further, although the flange 23 is formed on the fastening member 2, the locking shaft surface 4 may be formed between the fastening male screw 21 and the connecting male screw 22 without forming the flange 23. In this case, the screwing depth of the high nut 2 may be determined each time while mechanically or confirming, or another mark may be provided.

  On the other hand, as the high nut 3 used in this embodiment, a commercially available one can be applied. As shown in FIG. 4, a long internal thread is formed in the axial direction along the rotation axis, which is also called a long nut. The high nut 3 is fitted to a rotary tool such as a spanner or a socket wrench and functions as a head portion of the fastening member 2. In this embodiment, the hexagonal nut is exemplified, but the present invention is not limited to this, and a nut having another outer shape may be used as long as it is rotated by a rotary tool or the like.

  In the fastening member 2 and the high nut 3 having the above-described configuration, as shown in FIG. 1, the high nut locking and connecting method of the present embodiment is configured such that the connecting male screw 22 of the fastening member 2 is connected to the high nut 3. The high nut 3 is screwed to a position where the high nut 3 comes into contact with the flange 23. Then, as shown in FIG. 2, a general press machine P is used to press the outer peripheral surface 31 of the high nut 3 in the axial direction from two opposing directions. At this time, as the pressing position, the outer peripheral surface 31 corresponding to the locking shaft surface 4 of the fastening member 2 is pressed out of the outer peripheral surface 31 of the high nut 3. As a result, as shown in FIG. 4, the inner peripheral surface 32 of the high nut 3 bulges by the press work and comes into contact with the locking shaft surface 4, and is engaged in a state of being hooked on the tip side portion of the connecting male screw 22. Therefore, the locking force is increased. For this reason, it is possible to connect firmly like a connection fitting with an integrated high nut. Note that the position of the press corresponding to the locking shaft surface 4 is that the portion of the connecting male screw 22 is generally hardened so that it is not easily deformed. This is because it is difficult to lock.

  Moreover, in the press work in this embodiment, the axial center of the fastening member 2 and the axial center of the high nut 3 are made to correspond by pressing from two opposing directions in the axial direction, and further used for pressing. When pressing from two directions in terms of mold production costs, maintenance costs for adjustments during processing, etc., as shown in FIG. 6, it may be possible to press from three directions. You may make it press from the above direction or the perimeter direction.

According to the high nut locking and connecting method of the present embodiment as described above, the following effects can be obtained.
1. The fastening member 2 and the high nut 3 can be manufactured easily and at low cost because a commercially available high nut 3 or a commercially available press machine P may be used, and it is not necessary to perform welding.
2. Since the fastening member 2 and the high nut 3 are connected by a high locking force such as an integral type, the fastening member 2 and the high nut 3 can be removed together with the fastening member 2 even after being used as a scaffolding bracket or the like.
3. Since the position to be bulged by pressing is the position of the locking shaft surface 4, a high pressing force that crushes the connecting male screw 22 is not required.
4). Since the inner peripheral surface 32 of the high nut 3 is bulged until it comes into contact with the locking shaft surface 4 and is engaged with the thread on the distal end side of the connecting male screw 22, it can be locked and connected with high frictional force. In addition, it will prevent falling out.

  The high nut locking connection method according to the present invention is not limited to the above-described embodiment, and can be changed as appropriate.

DESCRIPTION OF SYMBOLS 1 Metal fitting with high nut 2 Fastening member 3 High nut 4 Locking shaft surface 21 Male screw for fastening 22 Male screw for connection 23 Flange 31 Outer peripheral surface 32 Inner peripheral surface P Press machine

Claims (1)

A method of locking and connecting a high nut to a fastening member having a connecting male screw, wherein the connecting male screw is formed on the distal end side of the outer peripheral surface of the shaft portion on which the connecting male screw is formed. A locking shaft surface is formed, and the connecting male screw is inserted from one end of the high nut and screwed together, and an outer periphery corresponding to the locking shaft surface of the outer peripheral surface of the high nut By pressing the surface toward the axis center from two directions, the inner peripheral surface of the high nut bulges on the locking shaft surface , and the bulging portion abuts on the locking shaft surface, A high nut locking connection method in which the bulging portion is locked to the connecting male screw .

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