JP2951911B2 - Screw - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the screw again and again relates capable of stopping slack by easily and clamped visually confirmed threaded fastening.

[0002]

2. Description of the Related Art In a situation where a temporary tightening is first performed and a final tightening is performed after an adjusting operation of an assembly such as a frame structure, forgetting to tighten a screw is a serious problem. Conventionally, whether or not a screw is tightened has been confirmed by actually tightening the screw, so that the operation has required much labor.

[0003] For example, Japanese Utility Model Application Laid-Open No. 63-133624.
No. proposes a chrysanthemum washer that can be deformed by tightening. However, visual deformation of the washer alone is not sufficient. Japanese Patent Application Laid-Open No. 1-131313 proposes a washer whose outer peripheral portion can be broken by tightening a screw. Is wasted. On the other hand,
It is very convenient if the screws are tightened to prevent loosening at the same time.

[0004] The present invention has excellent economical, yet handling properties, together can be easily visually confirmed threaded fastening, provide the threaded member that allows also the locking of the screw by tightening operation of the screw It is an object.

[0005]

Means for Solving the Problems In the present invention, claim 1 is provided.
The described invention is a screw which is a screw shaft or a nut screwed to the screw shaft, wherein the screw has a display portion made of a soft material on an outer peripheral portion of a fastening surface, and the display portion is ,
The screw is interposed between the body to be tightened to be tightened and pressurized due to the tightening of the screw, thereby forming a protruding portion that protrudes from the outer peripheral edge of the tightening surface to the outside, and the screw includes the screw, A screw shaft is screwed to a tightened body or a screw shaft and a nut are screwed together to provide a bonding portion that starts hardening to prevent loosening, and the display portion is made of silicon rubber, natural rubber, synthetic rubber or While a colored soft material made of a soft synthetic resin or the like is used, the bonding portion is hardened by mixing the main agent with the main agent.
And a granule was Fuhama the curing agent Maikuroka capsule that,
Breaking the granules by tightening the screws
While starting to harden more, the main agent or
Apply one of the granules and
It is characterized in that the other of the main agent or the granules is applied .

According to a second aspect of the present invention, the screw is provided with
A cone-shaped tapered surface is formed on the outer peripheral portion of the
The indicator is provided on the tapered surface, and
In the invention of Item 3, the display portion is unevenly distributed on the outer peripheral side of the fastening surface.
It is characterized by having a bulging portion .

[0007]

[0008]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a screw 1 of the present invention is a screw shaft or a nut to be screwed to the screw shaft. In this embodiment, the screw 1 is exemplified, and the screw 1 is mounted on a head that does not use a nut as a screw shaft. The hexagon socket head bolt B1 in which a hexagon socket is formed is illustrated.

A hexagon socket head bolt B1 (hereinafter simply referred to as "hex socket head bolt B1"), which is a screw, is provided on the outer periphery of the tightening surface 3 for tightening the tightened body 7 (shown in FIG. 4). The display unit 4 made of a soft material is provided in the unit.

The display unit 4 is made of a soft material such as colored silicon rubber (resin) in this embodiment. For example, UV # 5091 or UV # 5088 manufactured by Loctite Co., Ltd.
A water-soluble sodium polyacrylate and a pigment are
After applying a mixed solution mixed at a ratio of 0: 10: 1 to the outer peripheral portion of the tightening surface 3, UV irradiation is performed to obtain elasticity,
It can be cured while maintaining softness. The curing state of the display unit 4 can be appropriately adjusted by changing the UV irradiation time and the mixing ratio.

Further, as shown in FIG. 2, which is a cross section taken along the line AA in FIG. 1, the display section 4 exemplifies a display arranged continuously in an annular shape along the outer peripheral edge 3A of the fastening surface 3. Display unit 4
Is arranged so that it does not substantially protrude from the outer peripheral edge of the head of the hexagon socket head bolt before the hexagon socket head bolt B1 is tightened, so that it is substantially invisible from the screw head side. It is configured as follows. Note that, in addition to the display portion 4 which is continuously arranged in an annular shape on the fastening surface 3 of the screw as in this example,
As shown in FIG. 3 (cross section taken along the line AA in FIG. 1), it may be intermittently dispersed.

As shown in FIG. 4, the display unit 4 is interposed between the hexagon socket head cap screw B1 and a body 7 to be tightened, such as a plate member, and is pressed by the tightening of the screw. A protruding portion 5 which is deformed and protrudes from the outer peripheral edge 3A of the fastening surface 3 to the outside, particularly from the screw head side, is formed. Therefore, by confirming the protruding portion 5 from the outside, the tightening of the hexagon socket head cap screw B1 can be easily visually confirmed. In this example,
The protruding portion 5 can be formed in a substantially annular shape as before the display portion 4 is deformed, and the visibility can be further improved.

The tightening torque at the time of forming the protruding portion 5 can be changed by adjusting the arrangement position, hardness, etc. of the display portion 4. 5 may not be formed.

The display portion 4 is made of a soft material such as silicone rubber or silicone resin as described above, so that the tightening surface 3 of the hexagon socket head bolt B1 and the tightened member 7 can be formed. There is an advantage that the friction between them can be reduced and the tightening torque can be reduced, and it is also possible to prevent the protruding portion 5 from hardening and chipping off. In addition to the silicone rubber shown in this example, a colored soft material other than transparent, such as natural rubber, synthetic rubber, or soft synthetic resin, can be used for the display unit 4 as appropriate.

Next, in the present invention, the hexagon socket head cap screw B
No. 1 is characterized in that it is provided with an adhesive portion 6 which starts hardening by screwing into a tightened body 7 and prevents loosening. In the present embodiment, as shown in FIG. 5, the bonding portion 6 includes a main agent a and a granule d in which a hardener b hardened by mixing with the main agent a is encapsulated in a microcapsule c of a film-forming substance. A so-called two-component mixed type adhesive that starts to cure by breaking the granules d by tightening the screw, and that the screw portion 2 of the hexagon socket head cap screw B1
One of the main agent a and the granular material d is applied in advance.

Thus, according to the present invention, as shown in FIG. 4, the protruding portion 5 is formed by tightening the hexagon socket head cap screw B1 so that the tightening of the screw can be easily confirmed visually and the screw portion 2 can be easily confirmed. The main agent a applied to
One of the granules b and the other of the tightened body 7 are screwed together, so that the granules d break and mix with the main agent a to start hardening. This is very preferable in that a loosening effect can also be exerted.

As the main agent a of the bonding portion 6, for example, a water-soluble resin solution can be used. More specifically, as a pre-coating type adhesive, 55 to 60% by weight of water, 30 to 35% by weight of aromatic dimethacrylate, Acrylic polymer 1-3% w
t, ammonium benzoate 1-3% wt, melamine resin 1
A mixture having a content of about 3% wt and silica having a content of 3-5% wt, and a curing agent b such as a mixture of urea resin 85-90% wt and benzoyl peroxide 10-15% wt can be employed.
It is preferable to make the bonding portion 6 non-metal erodible in order to increase the durability of the screw 1.

Further, the bonding portion 6 is formed after the curing agent b is mixed with the main agent a for 24 hours or more, and in this example, after about 48 hours.
Because it is adjusted so that the curing reaction of 0% or more proceeds,
For example, even in a work mode in which the screw 1 is temporarily tightened and then the assembly is adjusted and fully tightened, even if the granule d is broken by the temporary tightening, a work time of about 48 hours is required until the final tightening. Since it can be expected, the workability is not impaired such that the adjustment work of the assembly can be performed without difficulty. In this example, the main agent a of the bonding portion 6 has a drying property, and even when applied to the screw portion 2 of the hexagon socket head cap screw B1, the sticking is prevented by drying to improve the convenience at the time of transportation. It can be.

The larger the protruding portion 5 for confirming the tightening of the screw is, the more preferable the protruding portion 5 is for increasing the visibility from a distance. Therefore, in this embodiment, a protruding assisting means for promoting the large protruding portion is provided. Is exemplified. FIG. 6 is an enlarged view of a portion C in FIG. 1. For example, a cone-shaped tapered surface 9 is formed on the outer peripheral portion of the tightening surface 3 as the protrusion assisting means.
Is provided on the tapered surface 9. Needless to say, the display portion 4 swells toward the tightened body 7 with respect to the tightening surface 3.

The protruding assisting means makes it easy for the display portion 4 to fall down to the outer peripheral side of the tightening surface 3 through the tapered surface 9 by pressing by the tightening of the screw. Can be formed larger than that formed flat (shown by a dashed line in FIG. 6).

Further, as the protruding assisting means, for example, the display section 4 is not limited to having a semicircular cross section, and has an effect by having a bulging portion 4A unevenly distributed on the outer peripheral side of the fastening surface 3. Also in this case, the display portion 4 can easily fall down to the outer peripheral side of the fastening surface 3, so that a larger protruding portion 5 can be formed. And in this example, this method is
Since the method is used in combination with the method of forming the tapered surface 9 on the fastening surface 3, it is particularly preferable in that a larger protruding portion 5 can be formed.

FIG. 7 shows another embodiment of the present invention. In this embodiment, the screw 1 is a screw shaft, and illustrates a hexagon bolt B2. An indicator 4 is provided on the bolt tightening surface 3 in the same manner as described above. This display unit 4
It is the same as the case of the above-mentioned example that they may be arranged continuously in a ring or may be arranged intermittently. In this example, as shown in FIG. 8, as the protrusion assisting means, the display unit 4 having a bulging portion 4 </ b> A unevenly distributed on the outer peripheral side of the fastening surface 3 is illustrated. Further, as shown by a dashed line in the drawing, the tightening surface 3 of the hexagon bolt B2 may be formed as a cone-shaped tapered surface 9 in order to promote the formation of the protrusion 5 larger. In addition, the material of the display unit 4,
The configuration and the like of the bonding portion 6 can be the same as in the above-described embodiment.

In this embodiment, as shown in FIG. 9, by tightening the hexagonal bolt B2, the display section 4 forms the protrusion 5 so that the tightening of the screw can be easily confirmed visually from the bolt side. One of the main agent a and the granular material b applied to the screw portion 2 and the other of the tightened body 7
However, with the screwing, the granular material d is broken and the main agent a and the hardening agent b are mixed to start hardening, so that the screwing between the hexagonal bolt B2 and the nut N can be prevented from loosening.

FIG. 10 shows still another embodiment of the present invention. In this embodiment, the screw 1 is a nut N. A display unit 4 is provided on the tightening surface 3 of the nut N in the same manner as described above. This display part 4
May be arranged continuously in a ring or may be arranged intermittently as in the case described above. Note that, in this example, the display unit 4 is provided as
In this example, a bulged portion 4A which is unevenly distributed on the outer peripheral side is formed. The material of the display unit 4 and the configuration of the bonding unit 6 can be the same as those in the above-described embodiment, and the bonding unit 6 is applied to the screw hole portion 8 of the nut in advance.

In this example, as shown in FIG. 11, the protruding portion 5 is formed by tightening the hexagon bolt B2 so that the tightening of the screw can be easily confirmed visually from the nut side. Main agent a and granules applied
b and the threaded portion 2 of the bolt which is the body 7 to be tightened.
The other material is broken together with the screw to break the granules d and the main agent a
To start hardening by mixing with the hexagonal bolt B2, it can also exhibit the effect of preventing the hexagonal bolt B2 from loosening. In addition, when the display part is also provided on the tightening surface of the hexagonal bolt B2, the protruding part 5 can be formed on the bolt side and the nut side as shown by the dashed line in FIG. 11, and the tightening can be confirmed from either side. It is preferred in that respect.

As described above, the adhesive is applied to the screw portion 2 of the hexagonal bolt B2 with either the main agent a or the granular material d and the main agent a is applied to the screw hole 8 of the nut N. or by <br/> to keep applying the other granules d, mixed by roots Ji fastening of can be made the screwing locking the screw shaft and the nut. In this case, by applying the granular material d to the nut side, it is possible to suitably prevent the granular material d from being broken by an external impact or the like during transportation.

[0027]

As described above, according to the first aspect of the present invention, the protruding portion in which the display portion protrudes from the outer peripheral edge of the tightening surface to the outside by the pressure accompanying the tightening of the screw is formed. Therefore, by confirming the protruding portion from the outside, the tightening of the screw can be easily visually confirmed. Further, since the adhesive portion provided on the screw starts to be hardened by tightening the screw, the screw can be simultaneously prevented from loosening.

[0028] Also, the main ingredient contact attachment part, by including the granules microencapsulated curing agent, wherein the granules to reliably be initiated cure destroying performed by tightening of the screw, before In addition to further ensuring the hardening, when granules containing a hardening agent are applied to the nut, breakage of the granules can be effectively prevented.

According to the second and third aspects of the present invention, a large protruding portion is provided by providing a protruding auxiliary means for facilitating the display portion to fall down to the outer peripheral side of the tightening surface by pressing by screw tightening. It may help to form and may allow for screw tightening confirmation from a greater distance.

[Brief description of the drawings]

FIG. 1 is a front view (partial cross section) showing an embodiment of a screw.

FIG. 2 is a sectional view taken along the line AA.

FIG. 3 is a diagram showing another arrangement method of the display unit.

FIG. 4 is a sectional view showing a tightened state of a screw.

FIG. 5 is a conceptual diagram illustrating a microcapsule.

FIG. 6 is an enlarged view of a portion C in FIG. 1;

FIG. 7 is a front view (partial cross section) showing another embodiment of the screw.
It is.

FIG. 8 is a partially enlarged view of FIG.

FIG. 9 is a sectional view showing the tightened state.

FIG. 10 is a sectional view showing another embodiment of the screw.

[11] Ru sectional view showing the fastening condition.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Screw B1 Hexagon socket head bolt B2 Hexagon bolt N Nut 3 Tightening surface 3A Outer edge of tightening surface 4 Display part 4A Bulging part 5 Protruding part 6 Adhesive part 7 Body to be tightened 9 Outer circumference of taper surface 11A Part 12 Display part 13 Tapered surface 15 Protruding part

──────────────────────────────────────────────────続 き Continuing on the front page (72) Koji Yamaguchi 1-4-1 Shinsenri Nishimachi, Toyonaka City, Osaka Prefecture Inside the National Housing Industry Co., Ltd. (72) Inventor Motoshi Iwashita 1-chome Shinsenri Nishimachi, Toyonaka City, Osaka Prefecture No. 1-4 Inside the National Housing Industry Co., Ltd. (72) Kazuo Ishikawa 1-19-14 Mitejima, Nishiyodogawa-ku, Osaka-shi, Osaka Prefecture Inside ISK Corporation (72) Inventor Koji Komatsu 3-chome, Kujo, Nishi-ku, Osaka-shi, Osaka 29-16 Co., Ltd. Osaka Rock Chemical Co., Ltd. (56) References JP-A-9-53621 (JP, A) JP-A-6-229408 (JP, A) JP-A-49-1005063 (JP, A) JP JP-A-3-178370 (JP, A) JP-A-58-125772 (JP, A) JP-A-60-44613 (JP, A) JP-A-8-42545 (JP, A) JP-A-64-83911 (JP , A) JP-A-8-4737 (JP, A) JP-A-5-280520 (JP, A) JP-A 1-159501 (JP, U) JP-A 60-54831 (JP, U) JP-A 63-135017 (JP, U) JP-A-63-133619 (JP, U) JP-A 52-3562 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16B 31/02 F16B 39 / twenty two

Claims (3)

(57) [Claims] 1. A screw which is a screw shaft or a nut screwed to the screw shaft, wherein the screw has a display portion made of a soft material on an outer peripheral portion of a tightening surface, and the display portion is The screw is interposed between the tightened body to be tightened and pressurized with the tightening of the screw to form a protruding portion that protrudes from the outer peripheral edge of the tightening surface to the outside, and the screw is The screw shaft is screwed to the tightened member or the screw shaft and the nut are screwed together, and the bonding unit starts to be hardened to prevent loosening, and the display unit is made of silicone rubber, natural rubber, or synthetic rubber. or
Uses a colored soft material made of a soft synthetic resin or the like, while the bonding portion is cured by mixing the main agent with the main agent.
And a granule in which a hardener is encapsulated in microcapsules.
Breaking the granules by tightening the screws
While starting to harden more, the main agent or
Apply one of the granules and
Screws, characterized in that the other of the main agent or the granules is applied . 2. The screw according to claim 1 , wherein said screw has a cone on an outer peripheral portion of said tightening surface.
Forming a tapered surface and forming the display section on this tapered surface.
The screw according to claim 1, wherein the screw is provided. 3. The display portion is unevenly distributed on an outer peripheral side of a fastening surface.
The screw according to claim 1, further comprising a bulge .