KR200299547Y1 - An improved structure of an anti-burglar screw bolt - Google Patents

Abstract

The improved structure of the anti-loosening screw bolt of the present invention has a pad and a nut and includes a bolt head and a bolt shaft, the bolt head being hexagonal with inner edges arranged at the same angle and provided with interconnected inclined surfaces, and connecting areas of each inclined surface. Is a blocking surface with a high-low drop, the pad is flat and circular with a diameter equal to the largest diameter of the bolt head, the center of the pad is provided with a through hole having a hole diameter larger than the diameter of the bolt axis, One side of is formed with a continuous inclined surface corresponding to the inclined surface of each bolt head, the other side of the pad is arranged with the same plurality of pointed interlocking straps, each strap has a vertical and inclined surface and the inclined direction of the inclined surface is Similar to a continuous slope, the nut is hexagonal and the inner edge of each side corresponds to a continuous slope Is provided, and also connected regions of the respective inclined surfaces are high - are formed in a blocking surface having a low drop.

Description

An improved structure of an anti-burglar screw bolt}

The present invention relates to an improved structure of anti-burglar screw bolts.

1 shows a conventional fastening screw nut and bolt. As shown, after a packing ring 11 is first placed on the work piece 6, the bolt 1 is inserted through the packing ring 11, and the work piece is provided with two fastening nuts 12, 13). However, the retaining nuts 12, 13 loosen when oscillated for a long time. Thus, another method as shown in FIG. 2 has been proposed to eliminate this drawback. The screw nut 2 is provided with a through hole 21 through which the iron wire 22 passes. The other end of the wire 22 is mounted on another work part. The iron wire prevents the nut 2 from displacing. However, this conventional structure can easily remove the iron wire 22 by cutting. Therefore, this conventional screw bolt / nut cannot prevent the fixed object from loosening.

The object of the present invention is to provide a screw bolt that is not easily loosened.

1 is a schematic view showing a conventional screw bolt.

2 is a schematic diagram showing another conventional screw bolt.

3 is an exploded view of the present invention.

4 shows a preferred embodiment of a sharp engagement strap in accordance with the present invention.

5A shows another preferred embodiment of the pad according to the present invention.

5B is a side view of FIG. 5A.

6A is a cross-sectional view of the present invention.

6B is an enlarged partial view of FIG. 6A.

Figure 7 illustrates the removal of the screw bolt of the present invention using a particular tool.

<Brief description of the main parts of the drawing>

1: bolt 2: screw nut

3: screw bolt 4,4 ': pad

5: nut 6: working part

7: pad 11: packing ring

12, 13: fixing nut 21: through hole

22: iron wire 31: bolt head

32: bolt shaft 41: through hole

42,42 ': Slope 43: Blocking surface

44,44 ': Engagement strap 45: Notch

311: Interior edge 312: Slope

313: blocking side 431: engagement strap

441: vertical surface 442: inclined surface

The present invention relates to screw bolts and, in particular, to screw bolts having a particular inclined surface to prevent removal without using a particular tool.

3, 6a and 6b, the figures show an improved structure of an anti-loosening screw bolt having a pad 4 and a nut 5 and a bolt having a bolt head 31 and a bolt shaft 32. The bolt head 31 is hexagonal with the inner edges 311 arranged at the same angle and provided with interconnected inclined surfaces 312 so that the shallowest region of the front notch of the inclined surface is the next notch of the inclined surface 312. Connected to the deepest area of the surface, the connecting area of each inclined surface becomes the blocking surface 313 having a high-lower drop, and the pad 4 is flat and circular with a diameter equal to the largest diameter of the bolt head, The center of (4) is provided with a through hole 41 having a hole diameter larger than the diameter of the bolt shaft 32, one side of the pad 4 is a continuous inclined surface corresponding to the inclined surface of each bolt head 31 So that the thinnest area of the front slope is the thickest area of the next slope High, each connection area is formed of a holding face with a high-low drop, the other side of the pad 4 is arranged with the same plurality of pointed engagement straps, each strap having a vertical plane and an inclined plane and an inclined plane The inclination direction of is similar to the continuous inclined surface of the pad 4, the nut 5 is hexagonal and the inner edge of each side is provided with an inclined surface corresponding to the continuous inclined surface, and the connection area of each inclined surface is high-low It is formed with a blocking face 43 having a drop.

In order to use the structure as described above, as shown in FIG. 6, the screw shaft 32 of the screw bolt 3 continuously passes through the pad 4 and the worktable 6, and at the opposite position. Another pad 7 positioned is passed through and a screw nut 5 is used to lock the two work benches. The bolt head 31 or the blocking surfaces 313, the blocking surfaces 53 of the nut, are rotated and pushed by the holding surfaces 43 of the pads 4, 7 to push the pads 4, 7.

5A and 5B show another preferred embodiment of the pad according to the present invention. As shown, the inner edge of the through hole 41 is raised to extend the continuous inclined surface 42 'and the pointed engagement strap 44' faces the center.

The pads 4, 7 follow the direction of the inclined surface 442 of the engagement strap 44, and thus the workbench is slowly tightened to force the pointed engagement strap 44 to tighten with the surface of the workbench. 3,4)

When the bolt head 31 or the nut 5 rotates in the opposite direction, the resistance of the inclined surface 42 and the inclined surfaces 312 and 5 is continuous with the resistance of the vertical surface 441 of the pointed engagement strap 431 relative to the work table. As a result, the screw bolt is not dislodged.

If the screw bolts are not removed, a specific tool must be used to remove the pads 7 simultaneously with the screw nuts or bolt heads. If the pad 4 is circular, a conventional tool cannot hold the pad together with the nut or bolt head, thus preventing the screw bolt from being removed from the bolt. Thus, in order to remove the pad 4 together with the nut or bolt head, a specific sleeve must be used for mounting to the notch 45 of the pad 4.

According to the present invention, the screw bolt firmly fixes the object to work and is not easily loosened.

Claims (6)

An improved structure of an anti-loosening screw bolt having a pad and a nut and comprising a bolt head and a bolt shaft, The bolt head is hexagonal with inner edges arranged at the same angle and provided with inclined surfaces connected to each other, wherein the connection area of each inclined surface is a blocking surface with a high-low drop; The pad is flat and circular with a diameter equal to the largest diameter of the bolt head, the center of the pad is provided with a through hole having a hole diameter greater than the diameter of the bolt axis, one side of the pad being the respective bolt Formed with a continuous inclined surface corresponding to the inclined surface of the head, the other side of the pad having a plurality of pointed engagement straps arranged identically, each strap having a vertical surface and an inclined surface and the inclined direction of the inclined surface being the continuous of the pad Similar to a slope; The nut is hexagonal and the inner edge of each side is provided with an inclined surface corresponding to the continuous inclined surface, and the connection area of each inclined surface is formed with a blocking surface having a high-low drop. Improved structure. 2. The improved structure of an anti-loosening screw bolt of claim 1 wherein a plurality of corresponding notches are provided between the outer edge of the pad and the corresponding continuous inclined surface. 2. The improved structure of an anti-loosening screw bolt according to claim 1, wherein the pad has a hexagonal shape corresponding to the bolt head and the nut. 2. The improved structure of an anti-loosening screw bolt according to claim 1, wherein the pointed engagement straps on the bottom surface of the pad are mounted at the same distance. 2. The improved structure of an anti-loosening screw bolt according to claim 1, wherein the pointed engagement straps on the bottom surface of the pad are inclined surfaces on both sides. The improved structure of claim 1, wherein the pad has a height higher than that of the pad.