JP2589145Y2 - Structure to prevent slippage of bolted parts by using recessed point screws - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing a relative displacement occurring after two parts are fixed with bolts.

[0002]

2. Description of the Related Art When two parts are fixed with bolts, especially near a place where the fixing part vibrates,
Sagging is likely to occur, resulting in a relative displacement between the two parts. Conventionally, the following two types of structures exist to prevent the displacement. One of them is to fix two parts 1 and 2 with bolts 3 and 3 as shown in FIG. 4 and then make a hole near the bolts 3 and 3 with a drill, and to attach knock pins 4 and 4 to the holes. It is driven to prevent the displacement. The other is, as shown in FIG.
After fixing the two parts 1 and 2 with the bolts 3 and 3, the contact plates (metal stoppers) 5 and 5 are installed on both sides of the one part 1 so that the one part 1 is sandwiched between the two parts 1 and 2 and The gap is prevented by welding.

[0003]

However, in the case of the structure in which the displacement is prevented by the first knock pin, since the mounting is performed after assembling, the drill for processing the hole of the knock pin cannot be inserted when the mounting place is narrow. In addition, in the case of assembling parts in precision equipment and the like, chips may be scattered by a drill, which may cause a defect or a failure. Further, in the case of the structure in which the second backing plate is welded, since the attachment is performed after the assembly as in the first case, the paint applied to the parts is burned by welding, so the appearance is emphasized. In such cases, extra work such as repainting is required. Further, since the caul plate is welded, it is difficult to completely process the welded portion without a gap, and in addition to being easily inclined, it is necessary to secure an extra space for the caul plate.

[0004]

According to the present invention, a tap hole is provided near a bolt hole of one component to be fixed to another component by a bolt, and the two components are bolted to each other. The above problem has been solved by a slip-preventing structure characterized in that, after being fixed by the above, a recessed tip screw is screwed into the tap hole until it comes into contact with the other component.

[0005]

The tap hole for mounting the recessed tip screw is not formed after fixing the component with the bolt, but is provided in advance near the bolt hole of one component to be fixed to the other component by the bolt. After fixing both parts with bolts, the recessed screw prevents the bolt from loosening by creating a repulsive force between the two parts, and the conical recess at the tip of the recessed screw is attached to the other part. The biting also prevents both parts from shifting in the horizontal direction.

[0006]

FIG. 1 shows a state in which recessed (also referred to as "wheel tip") screws 20, 20 are mounted. The bolts 13 are original mounting bolts for fixing one component 11 to the other component 12, and the recessed screws 20 according to the present invention are screwed in the vicinity thereof.

FIG. 2 is a cross-sectional view of the mounted state,
Is tightened in the direction of the component 12 by the bolt 13, but the bolt 13 is
A force is applied in a direction away from the side. Thus,
A tensile force acts on the bolt 13, so that the bolt 13 is hardly loosened. The position of the recessed tip screw 20 is preferably as close to the bolt 13 as possible unless there is a problem such as strength. This is because, when the component 11 is warped or the like, if the recessed screw 20 is separated from the bolt 13, the effect of the repulsive force of the recessed screw 20 on the bolt 13 is reduced.

FIG. 3 is an enlarged perspective view of the recessed tip screw 4. Since the tip portion of the recessed screw 20 is a conical recess 21, when this bites into the component 12,
There is no deviation in the horizontal direction between the two parts 11 and 12. The other end of the recessed screw 20 is provided with a hexagonal hole 22 in which a tool for tightening and removing is inserted.

[0009]

According to the present invention, it is possible to mount the component only if a simple operation for forming a tapped hole in one of the components at the time of component processing and a space for turning the recessed screw are secured. There is good workability. In addition, by using the recessed tip screw, it is possible to achieve the effect of preventing displacement in both the vertical and horizontal directions.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state where a recessed screw according to the present invention is mounted.

FIG. 2 is an enlarged sectional view of a part of FIG.

FIG. 3 is an enlarged perspective view of a recessed tip screw.

FIG. 4 is a perspective view of a conventional stopper structure using a knock pin.

FIG. 5 is a perspective view of a conventional stopper structure for welding a backing plate.

[Explanation of symbols]

 11 One part 12 The other part 13 Bolt 14 Bolt hole 15 Tapped hole 20 Recessed screw

Claims (1)

(57) [Scope of request for utility model registration] 1. A tap hole which penetrates one component to be fixed to the other component by a bolt near the bolt hole of the component, and the tap is formed after the two components are fixed to each other by bolts. A non-slip structure, wherein a recessed screw is screwed into the hole until the screw contacts the other component.