JPH0526341Y2 - - Google Patents
Info
- Publication number
- JPH0526341Y2 JPH0526341Y2 JP11328688U JP11328688U JPH0526341Y2 JP H0526341 Y2 JPH0526341 Y2 JP H0526341Y2 JP 11328688 U JP11328688 U JP 11328688U JP 11328688 U JP11328688 U JP 11328688U JP H0526341 Y2 JPH0526341 Y2 JP H0526341Y2
- Authority
- JP
- Japan
- Prior art keywords
- shear pin
- sprocket
- holes
- side hub
- safety device
- 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
- 230000005540 biological transmission Effects 0.000 claims description 3
- JGPMMRGNQUBGND-UHFFFAOYSA-N idebenone Chemical compound COC1=C(OC)C(=O)C(CCCCCCCCCCO)=C(C)C1=O JGPMMRGNQUBGND-UHFFFAOYSA-N 0.000 claims description 3
- 229960004135 idebenone Drugs 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 239000003638 chemical reducing agent Substances 0.000 description 6
- 239000000428 dust Substances 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Gears, Cams (AREA)
- Transmission Devices (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は除塵装置等に使用されるシヤーピン安
全装置に関する。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a shear pin safety device used in dust removal equipment and the like.
従来技術
水処理用の除塵装置、例えばバースクリーン、
トラベリングスクリーン、バー回転式スクリー
ン、沈砂掻揚機等は水中で駆動される等運転環境
が悪いため異常過負荷を起し易く、このために何
等かの機械の安全保護手段が講じられている。こ
の代表例としてはトルクリミツター、シヤーピン
安全装置等があげられる。Prior art Dust removal equipment for water treatment, e.g. bar screen,
Traveling screens, rotating bar screens, sand scrapers, etc. are prone to abnormal overloads because they are operated in poor operating environments, such as being driven underwater, and for this reason, some kind of machine safety protection measures have been taken. Typical examples include torque limiters and shear pin safety devices.
シヤーピン安全装置は構造が簡単であり、使用
するピンの断面積に比例して一律的に定まる荷重
で切断し動力伝達を確実に遮断する特色があるの
で依然として多くの機械に採用されている。 The shear pin safety device has a simple structure and is still used in many machines because it cuts with a load that is uniformly determined in proportion to the cross-sectional area of the pin used and reliably interrupts power transmission.
考案が解決しようとする課題
シヤーピン安全装置には前記のような特色があ
る反面、従来型のシヤーピン安全装置には次のよ
うな解決すべき問題点がある。第５図は従来型の
シヤーピン安全装置の縦断面図である。図におい
て１３はキー１６を介して減速機出力軸１５に固
定されている駆動側のハブであり、１２は減速機
出力軸に回転自在に軸着されスプロケツト１７と
一体的に形成されるスプロケツト側のハブであ
る。１８は前記二つのハブにそれぞれ同軸的に嵌
着されるブツシユでありシヤーピンを鋭断できる
よう硬具鋼等の硬い材料が用いられている。１４
は前記二つのブツシユ間に挿着されるシヤーピン
であり、嵌合が緩い場合には信頼性が低下するた
めはめ合寸法で挿着され、剪断部は規定の荷重で
破断する断面積になつている。以上の構造からな
る装置に於いてスプロケツト側に異常過大の負荷
がかかつた場合にはシヤーピンにも規定以上の剪
断力がかかり、剪断部で切断するが剪断部にはど
うしてもシヤーピンの軸方向に対し直角方向のち
ぎれ（以下“かえり”という）が発生する。切断
したシヤーピンをブツシユから抜き取るにはこの
かえりが邪魔になり簡単には抜き取れない。さら
にシヤーピン安全装置はその信頼性を確保するた
め、通常は切断しなくても所定時間経過後は定期
的に交換している。この場合使用中に大きな剪断
力が作用したにもかかわらず切断迄には至らず微
小な変形が残つた場合にも抜き取りが困難にな
る。除塵装置は公共的な性格の強い発電所、下水
処理場等で使用されるため早急の交換が必要であ
るがこれができないことになり問題は大きい。本
考案は叙上の問題を解決した交換を容易に行い得
るシヤーピン安全装置を提供することを課題とす
るものである。Problems to be Solved by the Invention Although the shear pin safety device has the above-mentioned features, the conventional shear pin safety device has the following problems to be solved. FIG. 5 is a longitudinal sectional view of a conventional shear pin safety device. In the figure, 13 is a drive-side hub fixed to the reducer output shaft 15 via a key 16, and 12 is a sprocket-side hub that is rotatably attached to the reducer output shaft and integrally formed with the sprocket 17. It is the hub of Bushes 18 are fitted coaxially to the two hubs, and are made of hard material such as hard tool steel so that they can sharply cut the shear pins. 14
is a shear pin that is inserted between the two bushes, and if the fit is loose, the reliability will decrease, so it is inserted with the fit size, and the shear pin has a cross-sectional area that will break under a specified load. There is. In a device with the above structure, if an abnormally excessive load is applied to the sprocket side, a shearing force exceeding the specified value will also be applied to the shear pin, and the shear pin will break, but the shear pin will inevitably bend in the axial direction of the shear pin. However, tearing in the direction perpendicular to the surface (hereinafter referred to as "burr") occurs. This burr gets in the way of removing the cut shear pin from the bushing, making it difficult to remove it easily. Furthermore, to ensure the reliability of the shear pin safety device, the shear pin safety device is usually replaced regularly after a predetermined period of time, even if it is not cut. In this case, even if a large shearing force is applied during use, but the cutting does not occur and a minute deformation remains, it becomes difficult to extract. Since dust removal equipment is used in public power plants, sewage treatment plants, etc., it is necessary to replace it immediately, but this is not possible, which is a big problem. An object of the present invention is to provide a shear pin safety device that solves the above-mentioned problems and can be easily replaced.
課題を解決するための手段
前記の課題を解決するための本考案の要旨とす
るところは、駆動側ハブに対向して配設されるス
プロケツト側ハブと該二つのハブに同軸的に挿着
されるシヤーピンとからなるシヤーピン安全装置
において、前記シヤーピンに嵌合する駆動側ホル
ダ及びスプロケツト側ホルダと、ホルダの円弧部
分が密接する半円孔と該半円孔より大きい半円孔
との組み合わせからなるダルマ型であつて前記二
つのハブにそれぞれ穿孔された装着孔と、前記ホ
ルダを該装着孔の小半円孔側にそれぞれ締着する
よう前記二つのハブにそれぞれ螺着されたネジと
からなることを特徴とするシヤーピン安全装置で
ある。シヤーピンが切断した場合でもあるいはそ
うでない場合でも交換作業を短時間にしかも容易
に行い得るシヤーピン安全装置である。Means for Solving the Problems The gist of the present invention for solving the above problems is that the sprocket side hub is disposed opposite to the drive side hub, and the sprocket side hub is coaxially inserted into the two hubs. A shear pin safety device consisting of a shear pin, which is a combination of a drive side holder and a sprocket side holder that fit into the shear pin, a semicircular hole in which the arc portion of the holder is in close contact, and a semicircular hole larger than the semicircular hole. It is of a Daruma type and consists of a mounting hole drilled in each of the two hubs, and a screw threaded into each of the two hubs so as to fasten the holder to the small semicircular hole side of the mounting hole. This is a shear pin safety device featuring: This shear pin safety device allows replacement work to be carried out quickly and easily even if the shear pin is broken or not.
作 用
駆動側及びスプロケツト側ハブに穿孔される装
着孔の形状を、あたかもダルマ型のように大小二
つの半円孔の組み合せとし、小さい方の半円孔の
大きさをシヤーピンに嵌合する円柱形のホルダの
円弧面例えば円周面の２分の１と密接できるもの
としたものである。そしてそれぞれのハブに螺着
されるネジによりホルダを装着孔に締着してい
る。そして二つのハブの装着孔とホルダの密接面
はいずれも回動の際には圧接するよう配設されて
いる。The shape of the mounting hole drilled in the drive side and sprocket side hub is a combination of two large and small semicircular holes, similar to a Daruma type, and the size of the smaller semicircular hole is a cylinder that fits into the shear pin. The shape of the holder can be brought into close contact with the arcuate surface of the holder, for example, one half of the circumferential surface. The holder is fastened to the mounting hole by screws screwed into each hub. The attachment holes of the two hubs and the contact surfaces of the holder are both arranged so as to come into pressure contact with each other during rotation.
実施例
以下実施例に基づき本考案の内容をさらに説明
する。第１図は本考案の一実施例の縦断面図、第
２図は第１図のＡ−Ａ視図、第３図は第１図のＢ
−Ｂ視図である。図に於いて８は除塵装置のチエ
ーン駆動用のスプロケツト部であり、スプロケツ
ト側ハブ２と一体的に形成され減速機６′の出力
軸６に回転自在に軸着されている。３は駆動側の
ハブであり、キー７及びセツトプレート１０によ
り減速機出力軸６に固定されている。１，１′は
シヤーピン４にはめあい寸法で固く嵌着している
二つのホルダであり、それぞれ駆動側のハブ３及
びスプロケツト側のハブ２に穿孔されるダルマ型
の装着孔９，９′に締着される。装着孔９，９′は
直径の異る二つの半円孔の組み合せからなつてお
り、ホルダの円弧部分例えば円周面の二分の一が
装着孔９の径の小さい半円孔に密接しネジ及びナ
ツト５，５′によつて締着される。ホルダと装着
孔の密接面は駆動側及びスプロケツト側いずれも
回動の際には圧接するよう配設される。運転中ス
プロケツト部８に異常な過負荷が発生した場合に
はシヤーピン４に規定以上の荷重がかかり剪断部
で切断し、動力伝達も遮断される。この場合は
５，５′のネジ及びナツトを緩め、切断したシヤ
ーピンを挿着したシヤーピンホルダ１，１′を装
着孔９，９′より取り外し新しいシヤーピン４を
挿着したホルダ１，１′を取り付けてネジ及びナ
ツト５，５′により締着する。取り外したホルダ
１，１′は機械修繕工場に持ち帰り切断したシヤ
ーピン４を除いて再使用に供する。EXAMPLES The contents of the present invention will be further explained below based on examples. Fig. 1 is a longitudinal sectional view of one embodiment of the present invention, Fig. 2 is a view taken along line A-A in Fig. 1, and Fig. 3 is a B-B in Fig. 1.
-B view. In the figure, reference numeral 8 denotes a sprocket portion for driving the chain of the dust removing device, which is formed integrally with the sprocket side hub 2 and is rotatably attached to the output shaft 6 of the reduction gear 6'. Reference numeral 3 designates a drive side hub, which is fixed to the reducer output shaft 6 by a key 7 and a set plate 10. Reference numerals 1 and 1' denote two holders that are firmly fitted to the shear pin 4 with the dimensions to fit, and are fastened to the daruma-shaped mounting holes 9 and 9' drilled in the hub 3 on the drive side and the hub 2 on the sprocket side, respectively. It will be worn. The mounting holes 9 and 9' consist of a combination of two semicircular holes with different diameters, and the arcuate portion of the holder, for example, one-half of the circumferential surface, is in close contact with the smaller diameter semicircular hole of the mounting hole 9, and the screw is inserted into the mounting hole 9. and are tightened by nuts 5, 5'. The contact surfaces of the holder and the mounting hole are arranged so as to come into pressure contact with each other during rotation on both the drive side and the sprocket side. If an abnormal overload occurs on the sprocket portion 8 during operation, the shear pin 4 is subjected to a load greater than the specified value and is cut at the shear portion, cutting off power transmission. In this case, loosen the screws and nuts 5 and 5', remove the shear pin holders 1 and 1' with the cut shear pin inserted from the mounting holes 9 and 9', and replace the holders 1 and 1' with the new shear pin 4 inserted. Attach and tighten with screws and nuts 5, 5'. The removed holders 1, 1' are taken back to a machine repair factory and are reused except for the cut shear pin 4.
第４図は他の実施例の縦断面図である。第４図
においては駆動側ハブ３の減速機側にボス１１を
延設し、該ボスの外面にスプロケツト側ハブ２を
軸着する構造の例である。この構造の利点は減速
機出力軸６が標準長さのものでも使用可能なこと
である。 FIG. 4 is a longitudinal sectional view of another embodiment. FIG. 4 shows an example of a structure in which a boss 11 is extended from the drive side hub 3 on the reducer side, and the sprocket side hub 2 is pivotally attached to the outer surface of the boss. An advantage of this structure is that the reducer output shaft 6 can be used even if it has a standard length.
効 果
以上説明した本考案によれば、シヤーピン安全
装置の切断したシヤーピンの交換作業あるいは定
期的な交換作業を短時間に行うことができるこ
と、そしてホルダからのシヤーピンの除去は機械
工場で行うためホルダに損傷を与えることがない
等の効果があるので本考案は産業上極めて有益で
ある。Effects According to the present invention explained above, it is possible to replace the cut shear pin of the shear pin safety device or periodically replace it in a short time, and since the removal of the shear pin from the holder is done at a machine shop, the holder The present invention is extremely useful industrially because it has the effect of not causing any damage to.
第１図は本考案の一実施例の縦断面図、第２図
は第１図のＡ−Ａ視図、第３図は第１図のＢ−Ｂ
視図、第４図は他の実施例の縦断面図、第５図は
従来型装置の縦断面図である。
１，１′……ホルダ、２……スプロケツト側ハ
ブ、３……駆動側ハブ、４……シヤーピン、５，
５′……ネジ＆ナツト、６……減速機出力軸、７
……キー、８……スプロケツト部、９，９′……
装着孔、１０……セツトプレート、１１……ボ
ス。
Fig. 1 is a vertical sectional view of one embodiment of the present invention, Fig. 2 is a view taken along line A-A in Fig. 1, and Fig. 3 is a view taken along line B-B in Fig. 1.
4 is a longitudinal sectional view of another embodiment, and FIG. 5 is a longitudinal sectional view of a conventional device. 1, 1'...Holder, 2...Sprocket side hub, 3...Drive side hub, 4...Shear pin, 5,
5'...screw & nut, 6...reducer output shaft, 7
...Key, 8...Sprocket section, 9,9'...
Mounting hole, 10...Set plate, 11...Boss.
Claims (1)
ツト側ハブ２と該二つのハブに同軸的に挿着さ
れるシヤーピン４とからなるシヤーピン安全装
置において、前記シヤーピン４に嵌合する駆動
側ホルダ１及びスプロケツト側ホルダ１′と、
ホルダ１，１′の円弧部分が密接する半円孔と
該半円孔より大きい半円孔との組み合わせから
なるダルマ型であつて前記二つのハブ２，３に
それぞれ穿孔された装着孔９，９′と、前記ホ
ルダ１，１′を該装着孔９，９′の小半円孔側に
それぞれ締着するよう前記二つのハブ２，３に
それぞれ螺着されたネジ５，５′とからなるこ
とを特徴とするシヤーピン安全装置。 ２ 駆動側ハブ３の装着孔９とスプロケツト側ハ
ブ２の装着孔９′を、その小半円孔側が回動方
向に対してそれぞれ上流側と下流側になるよう
配設して、動力伝達に際して装着孔９，９′の
小半円孔とホルダ１，１′が圧接することを特
徴とする請求項１記載のシヤーピン安全装置。[Claims for Utility Model Registration] 1. In a shear pin safety device comprising a sprocket side hub 2 disposed opposite to a drive side hub 3 and a shear pin 4 coaxially inserted into the two hubs, the shear pin a drive side holder 1 and a sprocket side holder 1' that fit into the sprocket 4;
A mounting hole 9, which is a daruma type and is made of a combination of a semicircular hole in which the arcuate portions of the holders 1 and 1' are in close contact and a semicircular hole larger than the semicircular hole, and is bored in each of the two hubs 2 and 3; 9', and screws 5 and 5' screwed into the two hubs 2 and 3, respectively, to tighten the holders 1 and 1' into the small semicircular holes of the mounting holes 9 and 9', respectively. A shear pin safety device characterized by: 2. The mounting holes 9 of the drive side hub 3 and the mounting holes 9' of the sprocket side hub 2 are arranged so that the small semicircular holes are on the upstream and downstream sides, respectively, with respect to the rotation direction, so that the mounting holes 9' of the drive side hub 3 and the sprocket side hub 2 are installed for power transmission. 2. The shear pin safety device according to claim 1, wherein the small semicircular holes of the holes 9, 9' are in pressure contact with the holders 1, 1'.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11328688U JPH0526341Y2 (en) | 1988-08-31 | 1988-08-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11328688U JPH0526341Y2 (en) | 1988-08-31 | 1988-08-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0234831U JPH0234831U (en) | 1990-03-06 |
| JPH0526341Y2 true JPH0526341Y2 (en) | 1993-07-02 |
Family
ID=31352985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11328688U Expired - Lifetime JPH0526341Y2 (en) | 1988-08-31 | 1988-08-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0526341Y2 (en) |
-
1988
- 1988-08-31 JP JP11328688U patent/JPH0526341Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0234831U (en) | 1990-03-06 |
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