JP2583076Y2 - Hex socket and counterbore cap for hexagon socket head bolt - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial application] The present invention prevents soil and dust from entering the counterbore hole of a train entrance / exit step and a counterbore hole of a semiconductor equipment machine which dislikes dust, resulting in an improvement in the yield rate of products. It is.

[0002]

2. Description of the Related Art Conventionally, as a device of this type, a cap having only a hexagonal hole (for example, a real
-173215), it is not possible to use the cap for the counterbore hole.Although there is a middle cap as shown in FIG. 7, dust easily accumulates in the periphery, and it is difficult to remove when you want to drop it off.
Also, as shown in FIG. 8, different materials (rubber, plastic, etc.) are protruded from the upper surface, dust enters the turning groove, falls off, wears out, and has a disadvantage that the color is different from the metal part and the appearance is poor. .

[0003]

[Problems to be solved by the invention] Caps of three types (A, B, C), (FIG. 1), (FIG. 2) and (FIG. 3) are selectively used in the state of a counterbore hole (deep counterbore, etc.). The lower disk (3) is slightly larger than the inscribed circle of the hexagonal hole so that the lower disk (3) bites into the hexagonal hole as shown in Figs. The plate (1) has an inverted conical shape to make it easier to enter the counterbore. Also, when removing the A cap, apply a metal plate (nail shape) to the center of the upper disk (1), When it is knocked in the P direction (FIG. 5), the upper disc (1) is deformed by striking the peripheral part in FIG. 2 because of the clearance length from the bottom of the hexagonal hole of the hexagonal bolt. Therefore, it can be easily removed with a screwdriver.

[0004]

The lower disk (3) is fixed to the hole of the hexagon socket head bolt by driving the center of the upper disk (1) of FIG.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, the A-cap shown in FIG. 1 has a counterbore depth which is usually equal to the head height of a hexagon socket head bolt +0.
5 mm, so the thickness of the upper disk (1) is 0.5 mm
Then, the center of the upper disk (1) is hit, and when it stops, it is flush with the upper surface, and the lower disk (3) is bitten into the hexagonal hole of the hexagonal bolt and fixed (FIG. 4).

The B-cap shown in FIG. 2 is a case where the counterbore is deep, and until the flange (4) hits the head of the hexagon socket head cap screw.
By hitting the disk (1), the lower disk (3) is fixed flush with the biting upper surface.

The C-cap shown in FIG. 3 is for deep counterbore as in FIG. 2, and is slightly larger than the diameter of the counterbore hole. The center part of the plate (1) is beaten, and when it stops, it is flush with the upper surface, and the lower disk (3) is fixed to the length of the hexagonal hole of the hexagonal socket head bolt.

[0008]

[Effect of the Invention] The present invention is configured as described above.
Same material as counterbored hole (iron, stainless steel, etc.)
In addition, because it is made of the same surface treatment (plating, etc.), it has a beautiful, inconspicuous appearance, is securely fixed,
Soil, etc. can be prevented.

[0009]

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram of a device immediately before mounting a cap A and a cap on a hexagon hole portion and a counterbore hole of a hexagon socket head cap screw and an enlarged view of the device A and a cap.

FIG. 2 is a view showing a state in which a B and a cap for a deep counterbore hole are mounted.

FIG. 3 is a diagram in which a counterbore for a cap and a cap are mounted in a deep counterbore hole and mounted.

FIG. 4 is a view of the apparatus, in which A and a cap are attached to a hexagonal hole and a counterbore.

FIG. 5 is a view in which the center of the device is knocked when the cap is detached and distorted, and the cap is disengaged with a screwdriver or the like; the cap once used cannot be reused.

FIG. 6

FIG. 7

FIG. 8 is a diagram of a commonly used cap method.

[Brief description of reference numerals]

 A, cap figure. B, cap figure. C, cap figure. 1. Upper disc. 2. An axis connecting the upper and lower disks. 3, lower disk (biting part). 4. Stopper collar for deep counterbore.

──────────────────────────────────────────────────の Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16B 37/14

Claims (1)

(57) [Scope of request for utility model registration] An upper disc (1) comprising an upper disc (1) in a counterbore of a hexagon socket head cap screw, a lower disc (3) inscribed in the hexagon socket, and a shaft (2) connecting the upper disc (3). A counterbore and hexagonal cap formed of resin or metal with a flange (4) provided between the lower disk (3) and the lower disk (3).