JPH04101009U - mounting screw - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a mounting screw that can prevent loosening due to tampering and has a good appearance. [Structure] A screw hole 5 is formed in the main screw head 4 which has the general tool engagement part 3 of the main screw 1, and the cosmetic screw 2 is screwed into the screw hole 5 and the main screw head 4 is screwed with the cosmetic screw head 11. At the same time as coating, a special tool engagement portion 10 was formed on the decorative screw head 11.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a mounting screw for mounting a lighting fixture or the like.

0002

[Conventional technology]

Conventional examples are shown in FIGS. 10 to 12. In other words, this diagram shows underground equipment. In this example, the device body 52 is buried in the embedding hole 51 in the ground 50, and the device body 52 is opened. A frame 53 is attached to the opening using mounting screws 54, for example hexagonal bolts. 56 is a nut into which the mounting screw 54 is screwed, and 57 is a nut that is connected to the frame 53 through the packing 55. It is a glass that can be held in place.

0003 Furthermore, the conventional example shown in FIG. The lighting fixture 61 is attached by the following.

0004

[Problem that the idea aims to solve]

However, these mounting screws 54 and 62 cannot be used with screwdrivers, spanners, wrenches, etc. Because it can be loosened with a general tool, no matter how strong the device itself is, it cannot be tampered with. Loosening or removing the mounting screws 54 and 62 may impair waterproof performance or damage the original functionality. There were times when I was unable to maintain my abilities.

[0005] Also, since the heads of the mounting screws 54 and 62 are exposed to the outside, the appearance may be impaired. was there. Therefore, the purpose of this invention is to prevent the loosening of the mounting screws due to mischief. It is an object of the present invention to provide a mounting screw that can also have a good appearance.

[0006]

[Means to solve the problem]

The mounting screw of this invention has an engaging part for a general tool on the main screw head, and A main screw with a screw hole formed in the main screw head, and a special A screw having a decorative screw head formed with an engaging portion for a special tool and screwed into the screw hole. It is equipped with a decorative screw.

[0007]

[Effect]

According to the configuration of this invention, a general tool is engaged with the general tool engagement portion of the main screw, and the Screw in the screw, and engage the special tool with the special tool engagement part of the cosmetic screw to tighten the cosmetic screw. Installation is completed by screwing into the screw hole of the main screw head. In this case, cosmetic screws are special Since it cannot be loosened without a tool, it prevents the cosmetic screws from coming loose due to mischief. Therefore, the tightening strength of the main screw can be maintained. Moreover, the main screw Since the head is covered with a cosmetic screw head, the appearance can be improved.

[0008]

【Example】

A first embodiment of this invention will be explained with reference to FIGS. 1 to 3. In other words, this The mounting screw includes a main screw 1 and a decorative screw 2. The main screw 1 has a general tool engagement part 3 on the main screw head 4, and the main screw head A screw hole 5 is formed in 4. The main screw head 4 at one end of the threaded portion 23 of this main screw 1 It consists of a collar 7 and a hexagonal column part 8, and the hexagonal shape on the circumference of the hexagonal column part 8 is used for general tool engagement. The screw hole 5 is formed in the center of the hexagonal column part 8. 9 is an engagement part for general tools This is a general tool, an example of which is a box wrench that engages with 3.

[0009] The decorative screw 2 covers the main screw head 4 and forms an engaging portion 10 for a special tool. It has a decorative screw head 11 and is screwed into the screw hole 5. Example makeup 2 is a decorative screw having a disk shape at the end of the screw portion 12 that is screwed into the screw hole 5. It has the same head 11 and covers the lead screw head 4. The special tool engagement part 10 is a decorative screw A pair of small holes 10 formed on the surface of the head 11 is used as an example, and it can be used as a screwdriver or a lever. It cannot be operated with general tools such as a punch. Special tool 6 is a disc-shaped knob A pair of protrusions 13 that fit into the special tool engaging part 10 are formed on the edge of the part 14. .

0010 Reference numeral 15 denotes a column, which has an opening 16 at its upper end and mounting holes 17 at both sides. is formed. The mounting hole 17 has an insertion hole 18 through which the threaded portion 23 of the main screw 1 passes, and the head 4. It consists of a large diameter part 19 that accommodates the. 20 is a lamp, which is placed on the upper end of the support 15; A mounting piece 21 that fits into the opening 16 is provided vertically on the surface to be inserted, and the mounting piece 21 is aligned with the insertion hole 18. A matching screw hole 22 is formed. Pass the threaded portion 23 of the main screw 1 through the insertion hole 18 When the screw hole 22 is tightened with the general tool 9 to a predetermined tightening strength, the lighting fixture 20 will be attached to the support. It is attached to the upper end of 15. Attach the protrusion 13 of the special tool 6 to the special tool engagement part 10. Insert the threaded part 12 into the threaded hole 5 of the main screw 1 by turning the cosmetic screw 2. When screwed in, the decorative screw head 11 of the decorative screw 2 covers the main screw head 4 of the main screw 1, and the As shown in FIG. 3, the large diameter portion 19 is closed by the decorative screw head 11.

[0011] According to this embodiment, the general tool 9 is engaged with the general tool engaging portion 3 of the main screw 1. Screw in the main screw 1 and engage the special tool 6 with the special tool engagement part 10 of the cosmetic screw 2. When the decorative screw 2 is screwed into the screw hole 5 of the main screw head 4, the installation is completed. this place In this case, the cosmetic screw 2 cannot be loosened without the special tool 6, so please do not use the special tool 6 to loosen it. Therefore, the tightening strength of the main screw 1 can be maintained. be able to. As a result, it is possible to prevent the mounting strength of the lamp 20 from being impaired. This allows the equipment to be used for a long time.

0012 Moreover, since the main screw head 4 is covered with the cosmetic screw head 11, the appearance is improved. I can do it. A second embodiment of this invention will be explained with reference to FIGS. 4 to 7. In other words, this The mounting screws are applicable to underground appliances, and are applicable to underground appliances. A glass receiver 26 is attached to the opening of the main body 25 with screws 27. A screw hole 22 is formed in the portion 26, and a glass 29 is placed on the glass receiving portion 26. Place the frame 30 that holds the glass 29 on, and align the mounting holes 17 of the frame 30 with the screw holes 22. 1, pass the main screw 1 through the mounting hole 17, and screw it into the screw hole 22. Main screw 1 has a hexagon socket A bolt is used as an example, and the screw hole 5 of the decorative screw 2 is a hexagonal hole for a general tool. It is formed at the bottom of the engaging portion 3. 32 is a lamp, and other first embodiments The same parts are given the same reference numerals. This embodiment also operates in the same way as the first embodiment. Since the frame 30 is prevented from loosening, the waterproof performance of the lighting equipment is not impaired. , the equipment can be used for a long time.

[0013] A third embodiment of this invention will be explained with reference to FIGS. 8 and 9. In other words, this The cosmetic screw 2 has a cosmetic screw head 11 that is not a perfect circle but has different lengths in the vertical and horizontal directions. A special tool (not shown) fits into the oval shape to create a cosmetic screw head. It has a concave portion that allows the portion 11 to rotate. In addition, the general tool engagement part 3 is not limited to the above-mentioned embodiment. It may be a groove or a plus groove.

[0014]

[Effect of the idea]

The mounting screw of this invention has an engaging part for a general tool on the main screw head, and A main screw with a screw hole formed in the main screw head, and a special A screw having a decorative screw head formed with an engaging portion for a special tool and screwed into the screw hole. Because it is equipped with a cosmetic screw, the cosmetic screw cannot be loosened without a special tool. This prevents the cosmetic screw from loosening due to mischief, thus increasing the tightening strength of the main screw. can be maintained. Moreover, since the main screw head is covered with a cosmetic screw head, the appearance is This has the effect of making it better.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a lighting device to which an embodiment of the present invention is applied.

FIG. 2 is an exploded perspective view of a mounting screw.

FIG. 3 is a perspective view of the lighting device.

FIG. 4 is a plan view of an underground device to which a second embodiment of the invention is applied.

FIG. 5 is a sectional view thereof.

FIG. 6 is a partially enlarged sectional view thereof.

FIG. 7 is an exploded perspective view of the mounting screw.

FIG. 8 is a plan view of a decorative screw according to a third embodiment.

FIG. 9 is a side view thereof.

FIG. 10 is a side view of a buried state of an underground device to which a conventional example is applied.

FIG. 11 is a perspective view of the frame and mounting screws.

FIG. 12 is a partially enlarged sectional view of the underground implantation device.

FIG. 13 is a perspective view of a lighting device to which another conventional example is applied.

[Explanation of symbols]

1 Main screw 2 Cosmetic screw 3 Engagement part for general tools 4 Main screw head 5 Screw hole 10 Special tool engagement part 11 Cosmetic screw head

Claims (1)

[Scope of utility model registration request] 1. A main screw having a general tool engagement part on the main screw head and a screw hole formed in the main screw head;
A mounting screw having a decorative screw head that covers the main screw head and forms an engagement portion for a special tool, and is screwed into the screw hole.