JPH059551Y2 - - Google Patents
Info
- Publication number
- JPH059551Y2 JPH059551Y2 JP5187U JP5187U JPH059551Y2 JP H059551 Y2 JPH059551 Y2 JP H059551Y2 JP 5187 U JP5187 U JP 5187U JP 5187 U JP5187 U JP 5187U JP H059551 Y2 JPH059551 Y2 JP H059551Y2
- Authority
- JP
- Japan
- Prior art keywords
- screw
- large diameter
- rubber bushing
- vibration
- diameter portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 241001247986 Calotropis procera Species 0.000 description 12
- 230000000694 effects Effects 0.000 description 4
- 230000004323 axial length Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 241000217377 Amblema plicata Species 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Bolts, Nuts, And Washers (AREA)
- Vibration Prevention Devices (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は、ゴムブツシユ内に挿通される大径部
の横断面形状を、例えば略三角形状にした耐振用
段付ねじに関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vibration-proof stepped screw whose large diameter portion inserted into a rubber bushing has a substantially triangular cross-sectional shape, for example.
［従来の技術］
たとえばモータを、取付ねじを用いて電機機器
のシヤーシに取り付けた場合、モータの回転に伴
い発生する振動によつて、取付ねじが緩むおそれ
があるので、ねじの緩みを防止し、同時に電機機
器のシヤーシへの振動伝達を防止するため、一般
に、電機機器のシヤーシ（またはモータ取付ブラ
ケツト）と、取付ねじとの間にゴムブツシユを介
挿するようにしている。また、ゴムブツシユを締
め付け過ぎないように、取付ねじとしては段付ね
じを使用することが多い。[Prior Art] For example, when a motor is attached to the chassis of an electrical device using mounting screws, there is a risk that the mounting screws may loosen due to vibrations generated as the motor rotates, so it is necessary to prevent the screws from loosening. At the same time, in order to prevent vibrations from being transmitted to the chassis of the electrical equipment, a rubber bush is generally inserted between the chassis (or motor mounting bracket) of the electrical equipment and the mounting screw. Additionally, stepped screws are often used as mounting screws to prevent the rubber bush from being over-tightened.
このような用途に用いられる耐振用段付ねじ
は、ねじ頭とねじ部との間に、ねじ部より径の大
きい大径部を設けた形状をなす。大径部はゴムブ
ツシユ内に挿通するが、この場合、ゴムブツシユ
の軸方向長さを大径部のそれよりも若干長くし
て、その長い分を、ねじの締め付けにより圧縮す
る締め代としている。 The vibration-proof stepped screw used for such applications has a shape in which a large diameter portion having a larger diameter than the threaded portion is provided between the screw head and the threaded portion. The large diameter portion is inserted into the rubber bushing, but in this case, the axial length of the rubber bushing is made slightly longer than that of the large diameter portion, and this longer length is used as a tightening margin for compression by tightening the screw.
このように、ゴムブツシユを軸方向に圧縮する
と、ゴムブツシユは、半径方向の内方及び外方に
膨出しようとし、ゴムブツシユの内方膨出部が段
付ねじの大径部外周に強く密接するようになる。
そこで、大径部とゴムブツシユとの間及びねじ頭
とゴムブツシユとの間の強い接触抵抗により、ね
じは緩み難い状態となる。 In this way, when the rubber bushing is compressed in the axial direction, the rubber bushing tends to bulge inward and outward in the radial direction, so that the inwardly bulging part of the rubber bushing comes into close contact with the outer periphery of the large diameter part of the stepped screw. become.
Therefore, due to strong contact resistance between the large diameter portion and the rubber bushing and between the screw head and the rubber bushing, the screw becomes difficult to loosen.
［考案が解決しようとする課題］
モータのように振動発生源となるものを、ゴム
ブツシユを介して耐振用段付ねじで電機機器のシ
ヤーシ等に取り付けると、段付ねじの大径部とゴ
ムブツシユとの間及びねじ頭とゴムブツシユとの
間の強い接触抵抗により、ねじは緩み難い状態と
なるが、その緩み防止効果にも限度があり、長時
間にわたつてモータ等からの振動が伝達され続け
ると、段付ねじも徐々に緩んできてしまう。そし
て、一旦緩み始めると、段付ねじの大径部とゴム
ブツシユとの間及びねじ頭とゴムブツシユとの間
の接触抵抗が弱まるため、緩み防止効果がますま
す低下して、ねじの緩みが急速に進行するという
問題があつた。[Problem to be solved by the invention] When a vibration-generating source such as a motor is attached to the chassis of an electrical equipment using a vibration-proof stepped screw through a rubber bushing, the large diameter part of the stepped screw and the rubber bushing will The strong contact resistance between the screw head and the rubber bushing makes it difficult for the screw to loosen, but there is a limit to its effectiveness in preventing loosening, and if vibrations from the motor etc. continue to be transmitted over a long period of time, the screw will become difficult to loosen. , the stepped screws also gradually become loose. Once it starts to loosen, the contact resistance between the large diameter part of the stepped screw and the rubber bushing and between the screw head and the rubber bushing weakens, so the loosening prevention effect further decreases, and the screw loosens rapidly. There was a problem with progress.
本考案の目的は、モータのように振動発生源と
なるものを、ゴムブツシユを介して電機機器のシ
ヤーシ等に取り付けるための耐振用段付ねじにお
いて、振動発生源からの振動を長時間受け続けた
場合でも、緩み防止効果を持続し得るようにする
ことにある。 The purpose of this invention is to use a vibration-resistant stepped screw for attaching a vibration-generating device such as a motor to the chassis of an electrical equipment via a rubber bushing, so that it can be used for long periods of time without being exposed to vibrations from the vibration-generating source. The objective is to maintain the loosening prevention effect even in the case of
［課題を解決するための手段］
大径部の形状を、３以上の非真円周面を丸味を
帯びた稜でつないだ柱形状とする。[Means for solving the problem] The shape of the large diameter portion is made into a columnar shape in which three or more non-circumferential surfaces are connected by a rounded edge.
［作用］
大径部をゴムブツシユ内に挿通して、締め付け
た際、ゴムブツシユの内周部が密接する大径部は
非真円周面となつているので、ゴムブツシユの内
方膨出部が段付ねじの回転に対する強い抵抗体と
なり、段付ねじは極めて緩み難い状態となる。[Function] When the large diameter part is inserted into the rubber bushing and tightened, the large diameter part with which the inner periphery of the rubber bushing comes into close contact has a non-perfect circular surface, so the inwardly bulging part of the rubber bushing is stepped. It becomes a strong resistance to the rotation of the stepped screw, and the stepped screw becomes extremely difficult to loosen.
［実施例］
まず、第１図〜第５図の実施例について説明す
る。[Example] First, the example shown in FIGS. 1 to 5 will be described.
第１図は耐振用段付ねじ１の外観を示すもの
で、ねじ頭２とねじ部３との間に設けられた大径
部４の形状は、３つの非真円周面５を丸味を帯び
た稜６でつないだ柱形状となつている。つまり、
大径部４を平面図上で見ると、第２図のように丸
味を帯びた略三角形状をなしている。 FIG. 1 shows the external appearance of a vibration-proof stepped screw 1. The shape of the large-diameter portion 4 provided between the screw head 2 and the threaded portion 3 is such that the three non-circumferential surfaces 5 are rounded. It has a columnar shape connected by a ridge 6. In other words,
When the large diameter portion 4 is viewed from a plan view, it has a rounded, substantially triangular shape as shown in FIG.
第３図〜第５図は、電機機器のシヤーシ７への
モータ８の取り付けを示すもので、まずシヤーシ
７のねじ挿通孔９内周縁にゴムブツシユ１０を嵌
めておき、このゴムブツシユ１０に段付ねじ１を
挿通し、ねじ部３をモータ８のケーシングに設け
られたねじ孔（図示せず）に螺合する。 3 to 5 show how to attach a motor 8 to a chassis 7 of an electrical equipment. First, a rubber bush 10 is fitted to the inner circumferential edge of the screw insertion hole 9 of the chassis 7, and a stepped screw is inserted into the rubber bush 10. 1 and screw the threaded portion 3 into a screw hole (not shown) provided in the casing of the motor 8.
この場合、大径部４の軸方向の長さ(L)よりもゴ
ムブツシユ１０の軸方向の長さ（Ｌ＋ΔL）を若
干長く設定しておき、その長くした分を段付ねじ
１による締め代とする。 In this case, set the axial length (L + ΔL) of the rubber bush 10 to be slightly longer than the axial length (L) of the large diameter portion 4, and use the increased length as the tightening allowance for the stepped screw 1. do.
そうすると、ゴムブツシユ１０は軸方向に圧縮
されると同時に、半径方向の内方及び外方に膨出
しようとし、ゴムブツシユ１０の内方膨出部が段
付ねじ１の大径部４外周に強く密接するようにな
る。 As a result, the rubber bushing 10 is compressed in the axial direction and at the same time tries to bulge inward and outward in the radial direction, and the inwardly bulging part of the rubber bushing 10 tightly contacts the outer periphery of the large diameter part 4 of the stepped screw 1. I come to do it.
ところが、大径部４は略三角形状になつている
ので、段付ねじ１を締め付けた状態では、第５図
のようにゴムブツシユ１０の内方膨出部もその形
状になじんで略三角形状となつている（第５図中
の二点鎖線は、ゴムブツシユ１０の原形を示して
いる）。従つて、ゴムブツシユ１０の内方膨出部
が、段付ねじ１の回転に対するとなり、このため
段付ねじ１は極めて緩み難い状態となる。 However, since the large diameter portion 4 has a substantially triangular shape, when the stepped screw 1 is tightened, the inwardly bulging portion of the rubber bush 10 also adapts to the shape and becomes substantially triangular as shown in FIG. (The two-dot chain line in FIG. 5 shows the original shape of the rubber bushing 10). Therefore, the inwardly bulging portion of the rubber bush 10 resists the rotation of the stepped screw 1, so that the stepped screw 1 becomes extremely difficult to loosen.
また、段付ねじ１を締め付ける過程では、ゴム
ブツシユ１０の内方膨出部が徐々に大きくなつて
いくので、段付ねじ１の回転に対する内方膨出部
の抵抗も徐々に大きくなつていくが、大径部４の
稜６には丸味を付けてあるので、ゴムブツシユ１
０の内方膨出部が稜６との摺接によつて擦り切れ
てしまうおそれはない。 Furthermore, in the process of tightening the stepped screw 1, the inwardly bulging portion of the rubber bush 10 gradually increases in size, so the resistance of the inwardly bulging portion against the rotation of the stepped screw 1 also gradually increases. , since the ridge 6 of the large diameter portion 4 is rounded, the rubber button 1
There is no risk that the inwardly bulging portion of 0 will be worn out due to sliding contact with the ridge 6.
次に、第６図〜第７図の実施例について説明す
る。 Next, the embodiment shown in FIGS. 6 and 7 will be described.
この実施例における耐振用段付ねじ２１は、ね
じ頭２２の形状が、前記実施例のものと異なる。 The vibration-proof stepped screw 21 in this embodiment has a screw head 22 that is different in shape from that of the previous embodiment.
即ち、ねじ頭２２は、上下面の縦断面形状が円
弧状になるように形成され、ゴムブツシユ１０と
の接触面がほぼ円錐形状となつている。 That is, the screw head 22 is formed so that the vertical cross-sectional shape of the upper and lower surfaces is arcuate, and the contact surface with the rubber bush 10 is approximately conical.
従つて、第７図のように、ゴムブツシユ１０を
介して電機機器のシヤーシ７へのモータ８の取り
付けを行なうと、ゴムブツシユ１０の内周部が軸
方向に最も強く圧縮されることになり、ゴムブツ
シユ１０の内周部が効率よくを内方向に膨出す
る。 Therefore, as shown in FIG. 7, when the motor 8 is attached to the chassis 7 of the electrical equipment via the rubber bush 10, the inner circumference of the rubber bush 10 is compressed most strongly in the axial direction, and the rubber bush The inner circumferential portion of 10 efficiently bulges inward.
以上、二つの実施例を示したが、本考案はこれ
らに限定されるものではない。例えば二つの実施
例はいずれも、大径部４の外周面形状を、３つの
非真円周面と３つの稜６とで形成するものとした
が、４つ以上の非真円周面と稜とで形成するもの
としてもよい。 Although two embodiments have been shown above, the present invention is not limited to these. For example, in both of the two embodiments, the outer circumferential surface shape of the large diameter portion 4 is formed by three non-perfect circular circumferential surfaces and three ridges 6; It may also be formed with a ridge.
［効果］
本考案によれば、大径部の形状を、３以上の非
真円周面を丸味を帯びた稜でつないだ柱形状とし
ているので、大径部をゴムブツシユ内に挿通して
締め付けた際、ゴムブツシユが軸方向に圧縮され
るに伴い、ゴムブツシユの内周部が内方向へ膨出
して大径部の外周面形状になじみ、その内方膨出
部が段付ねじの回転に対する強い抵抗体となる。
従つて、耐振用段付ねじが振動発生源からの振動
を長時間受け続けても、ゴムブツシユによる緩み
防止効果が持続し、その緩みが防止される。[Effect] According to the present invention, the shape of the large diameter portion is columnar with three or more non-circular circumferential surfaces connected by rounded edges. Therefore, when the large diameter portion is inserted into the rubber bushing and tightened, as the rubber bushing is compressed in the axial direction, the inner peripheral portion of the rubber bushing bulges inward to match the outer peripheral shape of the large diameter portion, and this inward bulging portion provides strong resistance to the rotation of the shoulder screw.
Therefore, even if the vibration-resistant shoulder screw is subjected to vibrations from a vibration source for a long period of time, the anti-loosening effect of the rubber bushing is maintained, and the loosening is prevented.
第１図〜第５図は本考案の第１実施例を示すも
ので、第１図は外観斜視図、第２図は平面図、第
３図及び第４図は使用状態を示す部分断面図、第
５図は第４図のＶ−Ｖ線に沿う断面図、第６図及
び第７図は第２実施例における使用状態を示す部
分断面図である。
１，２１……耐振用段付ねじ、２，２２……ね
じ頭、３……ねじ部、４……大径部、５……非真
円周面、６……稜、８……モータ、１０……シヤ
ーシ。
Figures 1 to 5 show the first embodiment of the present invention, with Figure 1 being a perspective view of the exterior, Figure 2 being a plan view, and Figures 3 and 4 being partial sectional views showing the state of use. , FIG. 5 is a sectional view taken along line V-V in FIG. 4, and FIGS. 6 and 7 are partial sectional views showing the second embodiment in use. 1, 21... Vibration-proof stepped screw, 2, 22... Screw head, 3... Threaded part, 4... Large diameter part, 5... Non-perfect circular surface, 6... Edge, 8... Motor , 10...Siyashi.
Claims (1)
い大径部を設けた形状をなす耐振用段付ねじにお
いて、 前記大径部が、３以上の非真円周面を丸味を帯
びた稜でつないだ柱形状をなすことを特徴とする
耐振用段付ねじ。[Scope of Claim for Utility Model Registration] A vibration-proof stepped screw having a shape in which a large diameter portion with a larger diameter than the thread portion is provided between the screw head and the threaded portion, the large diameter portion having three or more non-contact parts. A vibration-resistant stepped screw characterized by having a columnar shape with perfectly circular surfaces connected by rounded edges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5187U JPH059551Y2 (en) | 1987-01-03 | 1987-01-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5187U JPH059551Y2 (en) | 1987-01-03 | 1987-01-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63109054U JPS63109054U (en) | 1988-07-13 |
| JPH059551Y2 true JPH059551Y2 (en) | 1993-03-09 |
Family
ID=30776699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5187U Expired - Lifetime JPH059551Y2 (en) | 1987-01-03 | 1987-01-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH059551Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5734495B1 (en) * | 2014-07-31 | 2015-06-17 | 有限会社ウェジコ | Fastening structure |
-
1987
- 1987-01-03 JP JP5187U patent/JPH059551Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63109054U (en) | 1988-07-13 |
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