JP2008045725A - Nut - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate a fault of lacking in screw-fastening strength in a conventional nut inserted around a bolt, freely movable into an object position without turning a screw and capable of further tightening because a nut mechanism works in a predetermined position. <P>SOLUTION: A joint of two conventional nuts placed one on top of the other is conical or trapezoidal, and a semicircular threaded part for holding down the bolt is structured to be divided into upper and lower nuts to work. Consequently, if further tightening is performed in a final stage, the force of the bolt going to escape into an escape hole works to cause a lack of strength. The important joint in this case is characterized by Z-shape without adopting conventional conical or trapezoidal shape. When the nut 3 and nut 1 are combined in Figure 2, the connecting bolt is fastened right from the side by a function of a screw 5 and a screw 8 moving to the center by the inclination of inclinations 9, 11 and inclinations 10, 12 and fixed in a state as close as one nut. The escape of the bolt is thereby prevented to provide sufficient fastening strength. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a nut that can be screwed into a bolt by inserting the bolt to a predetermined position and then rotating the bolt.

  Conventionally devised nuts have a conical or trapezoidal joint between two nut pieces.

  This nut had insufficient strength due to the tightening increased after insertion to a predetermined position. Since there is a step when the half-state parts of each processed screw are screwed into the bolt, the bolt will escape into the straight hole on the opposite side of the threaded wall surface when tightened, so that sufficient screwing strength is obtained. Otherwise there was a fault.

  The present invention has been made in view of the above-described conventional drawbacks, and an object of the present invention is to provide a nut that can prevent a bolt from escaping and can be strongly tightened.

  The above and other objects and novel features of the present invention will become more fully apparent when read in light of the following description and the accompanying drawings. However, the drawings are for explanation only and do not limit the technical scope of the present invention.

In order to achieve the above object, the structure is characterized by a seam, which is different from the conventional conical shape, trapezoid, and the alphabet Z-shape. In FIG. , The threaded part of 5 and 8 moves to the center with the inclination of 9, 11, and 10, 12, and the connection bolt is tightened from the side with the function to fix it in the state of one nut. Prevents escape and provides sufficient tightening strength.

In the holding means of the present invention, the inclination 9 of the nut 3 and the inclination 11 of the nut 1 are engaged with each other, and the inclination 12 of the nut 3 and the inclination 10 of the nut 1 are engaged with each other and pressed against the coil spring 14 with the connecting bolt as an axis. Secure the bolts. The inclination angle is an angle at which the female screws of the nut 1 and the nut 3 just slide into the thread of the connection bolt.
There is a hole 2 through which a bolt passes in FIG. 2, which will be described with reference to the nut 3 which is the basis of the present invention. On the opposite side surface of this hole, there is a machined half of a screw. This screw is machined in the center of the hexagon, and the thickness of the screw portion is exactly half that of the hexagonal body. The inclined surface 9 and the inclined surface 12 are parallel.

  4 provides a clutch mechanism in which the body can move freely by inserting the U-shaped spacer of FIG. 5 into the gap between the nut 3 and the nut 1. By pulling out the spacer at any position, the nut can be operated in the free position. It can be made.

  The close contact mechanism of the two nuts of the present invention is designed so that the close contact state is always maintained by four coil springs set on the head of the nut 1. When the bolt is inserted, the spring can be quickly moved to a predetermined position when the small screw portion is pushed outward and the through holes are upside down. The spring mechanism may be attached to the side surface as shown in FIG. Moreover, you may use elastic bodies, such as a leaf | plate spring and a ring spring rubber, without sticking to a coil spring.

  As is apparent from the above description, the following effects can be obtained in the present invention.

  (1) When inserted into the bolt, the nut 3 and the nut 1 are misaligned in the state shown in FIG. 3. In this position, the hole through which the bolt freely passes is exactly aligned so that the nut can move to the target position without rotation. When it stops at a predetermined position, the force of the coil spring works and the threads 5, 8 are fitted to the bolt. After that, you can complete the work by tightening a little.

  (2) FIG. 2 Threaded portions 5 and 8, when viewed from the top, the threaded portion is in a semicircular shape because the shape formed by the portion sandwiched between the inclination angles 9 and 12 when the nut 3 and the nut 1 are set. This is to make one nut state, so it is not adopted because the strength decreases when the screw is processed to the long diameter. It is not necessary to stick to the elliptical shape of the hole through which the bolt 2 in FIG. The minimum necessary strength is as much as possible. The last part is the improvement of the first product developed by our company.

  (3) In FIG. 6, 26 holes of the mounting plate 25 are mounted on the nut 3 and the mounting nut 1 is mounted. The need for mounting screws is very significant in terms of the number of surface parts in the cost of mass production work.

    The present invention is utilized in the industry of manufacturing nuts.

  Sectional drawing of the use condition of this invention.   Exploded view of the present invention   The side view which attached the spring position of the present invention to the side.   The side view which attached FIG. 5 to this invention   Perspective view of U-shaped spacer   Exploded view

Brief description of symbols

1, nut 2, bolt insertion hole 3, nut 4, bolt 5, screw thread 6, bolt insertion hole 8, screw thread 9, inclined surface 10, inclined surface 11, inclined surface 12, inclined surface 13, screw mounting hole 14, Spring 15, screw 16, screw 17, spring holding plate 18, spring holding plate 19, spring 20, spacer 21, screw 22, screw 23 cylinder 24 cylinder 25 mounting plate 26 hole 27 claw 28 claw

Claims (4)

  In the nut 3 of FIG. 2, there is 5 in which a half of the nut is formed on one side surface. This opposite wall has a hole 2 through which the bolt diameter just passes. The bolt can smoothly enter and exit the threaded portion of 5 and the hole portion of 2. The upper surface of the hole 2 is open to the left and is inclined 9. The upper surface of the screw part 5 has a right-sloped inclination 12, the inclination of 9 and the inclination of 12 are parallel and stepped, and the screw part 5 is formed in the middle. The nut 1 is a nut It is designed to be a nut 1 when 3 is rotated 180 degrees in the horizontal and vertical directions. The nut 3 and the nut 1 have the same shape. As illustrated in FIG. 3, when the bolt is inserted, the screw threads of the nut 3 and the nut 1 are separated and the bolt can be inserted. A nut comprising a holding means for holding the nut 3 and the nut 1 so that the screw thread can be positioned so as to be screwed onto the bolt.   2, the holding means is movable in the axial direction along the inclined surfaces 9 and 12 of the nut 3 and the nuts 10 and 11 in FIG. By fixing in the state of a single nut at the horizontal position, the bolt is fixed without generating a escaping force when fixed. The nut according to claim 1.   4, a clutch mechanism is provided in which the U-shaped spacer of FIG. 6 is inserted into the gap between the nut 3 and the nut 1 so that the nut can move freely. By pulling out the spacer at an arbitrary position, the nut can be operated at a free position. The nut according to claim 1, wherein:   FIG. 6 provides easy assembly. The hole portion 26 of the mounting plate 25 is inserted into the cylindrical portion 23 of the nut 3. Set the nut 1 on it. The spring 14 is fitted into the cylindrical part 24, and the attachment plate claws 26 and 27 are attached to the spring 14 to complete the process. The nut according to claim 1, which provides easy assembly without using screws.

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