JPH11250768A - Limit switch - Google Patents

Limit switch

Info

Publication number
JPH11250768A
JPH11250768A JP4942698A JP4942698A JPH11250768A JP H11250768 A JPH11250768 A JP H11250768A JP 4942698 A JP4942698 A JP 4942698A JP 4942698 A JP4942698 A JP 4942698A JP H11250768 A JPH11250768 A JP H11250768A
Authority
JP
Japan
Prior art keywords
switch
main body
limit switch
case
ground terminal
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.)
Pending
Application number
JP4942698A
Other languages
Japanese (ja)
Inventor
Akihiro Arataki
明弘 荒瀧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Omron Corp
Original Assignee
Omron Corp
Omron Tateisi Electronics Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Omron Corp, Omron Tateisi Electronics Co filed Critical Omron Corp
Priority to JP4942698A priority Critical patent/JPH11250768A/en
Publication of JPH11250768A publication Critical patent/JPH11250768A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02Details
    • H01H21/18Movable parts; Contacts mounted thereon
    • H01H21/22Operating parts, e.g. handle
    • H01H21/24Operating parts, e.g. handle biased to return to normal position upon removal of operating force
    • H01H21/28Operating parts, e.g. handle biased to return to normal position upon removal of operating force adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
    • H01H21/285Operating parts, e.g. handle biased to return to normal position upon removal of operating force adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift having an operating arm actuated by the movement of the body and mounted on an axis converting its rotating movement into a rectilinear switch activating movement

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a limit switch with a high explosion profness, easily connected to an earth wire while miniaturizing the entire size, having a switch accommodation chamber with an openable front formed in a metallic main body case, with a switch main body houses in the switch accommodation chamber fixed with screws to the main body case. SOLUTION: This limit switch is provided with an earth terminal 13 in a space formed between the inner wall surface of a switch accommodation chamber 2 and the outside surface of a switch main body 3. An installation base part 13a formed on one end part of this earth terminal 13 is fixed with a screw to the inner part of the switch accommodation chamber 2, and the other end side of the earth terminal 13 is extended to the vicinity of a front opening of the switch accommodation chamber 2 to from a wiring connection part 13b on the extended end part. An installation part 8b protruding from the switch main body 3 and the installation base part 13a are overlapped to be tightened together with a common screw 12b to a main body case 1.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、リミットスイッチ
に関し、さらに詳しくは、爆発性のガス雰囲気中での使
用に好適なリミットスイッチに関する。
The present invention relates to a limit switch, and more particularly, to a limit switch suitable for use in an explosive gas atmosphere.

【0002】[0002]

【従来の技術】一般に、爆発性のガス雰囲気中で使用さ
れる、いわゆる、防爆型のリミットスイッチは、接点切
り換え時のスパークによって本体ケース内で爆発が発生
したとしても、その爆発の影響がケース外に及ばないよ
うに、本体ケースの肉圧を厚くして防爆性能を高めるよ
うにしていた。
2. Description of the Related Art In general, a so-called explosion-proof type limit switch used in an explosive gas atmosphere, is not affected by an explosion even if an explosion occurs in a main body case due to a spark at the time of contact switching. In order not to reach outside, the body pressure of the main body case was increased to improve the explosion-proof performance.

【0003】また、近年では、スイッチ本体を、スイッ
チケース内にスイッチング機構を内蔵密封して防爆性能
を持たせるようにして、本体ケースの薄肉化および小型
化を図った防爆型のリミットスイッチも開発されてい
る。
In recent years, an explosion-proof limit switch has also been developed in which the switch body is provided with an explosion-proof property by sealing a switching mechanism in the switch case so as to have an explosion-proof performance. Have been.

【0004】[0004]

【発明が解決しようとする課題】このような防爆型のリ
ミットスイッチにおいては、感電防止のために本体ケー
スの内外からそれぞれアースを取るように規定されてい
る。この場合、本体ケース内部のアース線の接続作業
は、スイッチ収容空間の開口を利用して行われるのであ
るが、スイッチ本体に防爆性能を持たせたリミットスイ
ッチでは、本体ケースの小型化が図られるために、スイ
ッチ本体が収容されたスイッチ収容空間には狭い空間し
か残されておらず、このような狭い空間でのアース線の
接続作業は極めて煩わしいものである。
In such an explosion-proof limit switch, it is specified that each of the explosion-proof limit switches is grounded from inside and outside the main body case to prevent electric shock. In this case, the connection of the ground wire inside the main body case is performed using the opening of the switch housing space. However, in the limit switch in which the switch main body has explosion-proof performance, the main body case can be downsized. For this reason, only a narrow space is left in the switch housing space in which the switch body is housed, and the work of connecting the ground wire in such a narrow space is extremely troublesome.

【0005】もちろん、スイッチ収容空間を十分大きく
すれば、アース線の接続作業も容易になるのであるが、
これでは本体ケースが大型になり、リミットスイッチ全
体の小型化を図ることができなくなってしまう。
[0005] Of course, if the switch accommodating space is made sufficiently large, the work of connecting the ground wire becomes easy.
In this case, the size of the main body case becomes large, and the size of the entire limit switch cannot be reduced.

【0006】本発明は、このような実情に着目してなさ
れたものであって、全体の小型化を図りながら、アース
線の接続を容易に行うことができるリミットスイッチを
提供することを目的とする。
The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a limit switch capable of easily connecting a ground wire while reducing the overall size. I do.

【0007】[0007]

【課題を解決するための手段】上記目的を達成するため
に、本発明は以下のような構成および手段を採る。
In order to achieve the above object, the present invention employs the following constitution and means.

【0008】請求項1に係る発明のリミットスイッチ
は、金属製の本体ケースに、前面から開閉可能なスイッ
チ収容室を形成し、このスイッチ収容室にスイッチ本体
を収容固定したリミットスイッチにおいて、前記スイッ
チ収容室の内壁面と前記スイッチ本体との間に形成され
た空間にアース端子を配備し、このアース端子の一端側
の取付け基部をスイッチ収容室の内奥にネジ止め固定す
るとともに、アース端子の他端側をスイッチ収容室の前
面側へ延出させ、その延出端に配線接続部を形成してい
る。
According to a first aspect of the present invention, there is provided a limit switch in which a switch housing chamber is formed in a metal main body case from the front and can be opened and closed, and the switch main body is housed and fixed in the switch housing chamber. A ground terminal is provided in a space formed between the inner wall surface of the housing chamber and the switch body, and a mounting base at one end of the ground terminal is screwed and fixed to the inside of the switch housing chamber. The other end is extended to the front side of the switch accommodating chamber, and a wiring connection portion is formed at the extended end.

【0009】請求項2に係る発明のリミットスイッチ
は、請求項1の構成において、前記スイッチ本体から突
設した取付け部に前記アース端子の取付け基部を重合し
て、共通のネジで本体ケースに共締め固定している。
According to a second aspect of the present invention, there is provided a limit switch according to the first aspect, wherein the mounting base of the ground terminal is overlapped with a mounting portion projecting from the switch main body, and shared with the main body case with a common screw. Tightened and fixed.

【0010】請求項3に係る発明のリミットスイッチ
は、請求項1または2記載の構成において、前記アース
端子は、その取付け基部のネジ止め固定前の状態におい
て、前記スイッチ収容室の内壁面とスイッチ本体の外面
とに当接して回り止め支持されるものである。
The limit switch according to a third aspect of the present invention is the limit switch according to the first or second aspect, wherein the ground terminal is connected to an inner wall surface of the switch accommodating chamber before the mounting base is fixed by screws. It is stopped and supported in contact with the outer surface of the main body.

【0011】請求項4に係る発明のリミットスイッチ
は、請求項1ないし3のいずれかに記載の構成におい
て、前記スイッチ本体が、スイッチケースにスイッチン
グ機構を密封内蔵した防爆型である。
According to a fourth aspect of the present invention, in the limit switch according to any one of the first to third aspects, the switch body is an explosion-proof type in which a switching mechanism is hermetically sealed in a switch case.

【0012】[0012]

【作用】請求項1の構成によると、アース端子の取付け
基部は、スイッチ収容室の内壁面とスイッチ本体との間
に形成された狭い空間において本体ケースにネジ止め連
結する必要があるが、アース端子の配線接続部はスイッ
チ収容室の前面側へ延出されて立ち上げられているの
で、この配線接続部へのアース線の接続作業はスイッチ
収容室の開口において容易に行える。
According to the first aspect of the present invention, the mounting base of the ground terminal needs to be screw-connected to the main body case in a narrow space formed between the inner wall surface of the switch accommodating chamber and the switch main body. Since the wiring connection portion of the terminal extends to the front side of the switch accommodating chamber and is raised, the work of connecting the ground wire to the wiring connection portion can be easily performed at the opening of the switch accommodation chamber.

【0013】請求項2の構成によると、スイッチ本体か
ら突設した取付け部にアース端子の取付け基部を重合す
るので、アース端子を取り付けるための専用のスペース
をスイッチ収容室に形成する必要はない。また、スイッ
チ本体の取り付けネジとアース端子の取り付けネジとを
兼用できる。
According to the configuration of the second aspect, since the mounting base of the ground terminal is overlapped with the mounting portion projecting from the switch main body, it is not necessary to form a dedicated space for mounting the ground terminal in the switch accommodating chamber. Also, the mounting screw for the switch body and the mounting screw for the ground terminal can be used in common.

【0014】請求項3の構成によると、アース端子を本
体ケースにネジ止めする際に、アース端子がネジ回動に
よって共回りするのがスイッチ収容室の内壁面とスイッ
チ本体とで止められるので、スイッチ収容室の内奥部で
のネジ止めが容易となる。また、一本のネジ止めによっ
てもアース端子を所定の姿勢に確実に固定できる。
According to the third aspect of the present invention, when the ground terminal is screwed to the main body case, the ground terminal rotates together with the inner wall surface of the switch accommodating chamber and the switch main body due to the screw rotation. Screws can be easily fixed inside the switch housing chamber. Further, the ground terminal can be securely fixed in a predetermined posture even by one screw.

【0015】請求項4の構成によると、スイッチ本体に
防爆性能を持たせて本体ケースの小型化が図れた防爆型
のリミットスイッチにおいても、スイッチ収容空間の狭
いスペースを有効に利用してアース線の接続作業が容易
に行える。
According to the fourth aspect of the present invention, even in an explosion-proof type limit switch in which the switch body is provided with explosion-proof performance to reduce the size of the main body case, the narrow space of the switch accommodating space is effectively used to provide a ground wire. Can be easily connected.

【0016】[0016]

【発明の実施の形態】以下、本発明の実施形態を例示図
に基づいて説明する。
Embodiments of the present invention will be described below with reference to the drawings.

【0017】図1に、本発明に係るリミットスイッチの
全体を示す外観斜視図が、図2に縦断側面図が、また、
図3に正面図が、図4に分解斜視図がそれぞれ示されて
いる。
FIG. 1 is an external perspective view showing the whole of a limit switch according to the present invention, FIG.
FIG. 3 is a front view, and FIG. 4 is an exploded perspective view.

【0018】このリミットスイッチの本体ケース1はア
ルミダイキャストによって箱形に成型されたものであ
り、スイッチ収容室2の内部にスイッチ本体3が固定さ
れるとともに、本体ケース1の上端には操作用のヘッド
ケース4が取り付けられ、ヘッドケース4に取付けた操
作レバー5の回動によってスイッチ本体3が操作される
ようになっている。
The main body case 1 of this limit switch is formed in a box shape by aluminum die-casting. The switch main body 3 is fixed inside the switch accommodating chamber 2, and an upper end of the main body case 1 is provided for operation. The switch case 3 is operated by the rotation of the operation lever 5 attached to the head case 4.

【0019】スイッチ収容室2の前面開口には蓋6がネ
ジ止め装着されており、この蓋6を取り外すことで、ス
イッチ本体3への配線接続作業を行うことができ、スイ
ッチ本体3に接続されたコードを、本体ケース1下端の
配線導出口7にねじ込み装着される図示しないコード導
出キャップを介して外部に引き出すよう構成されてい
る。
A cover 6 is screwed into the front opening of the switch accommodating chamber 2. By removing the cover 6, wiring connection to the switch body 3 can be performed, and the switch body 3 is connected to the switch body 3. The cord is drawn out to the outside via a cord lead-out cap (not shown) which is screwed into the wiring lead-out port 7 at the lower end of the main body case 1.

【0020】スイッチ本体3は、スイッチング機構をス
イッチケース8に密封内蔵した防爆型のものが利用さ
れ、スイッチング機構に連係した操作突起9が上下変位
自在にスイッチケース8の上端に突設されるとともに、
スイッチケース8の前面には、内蔵スイッチング機構の
コモン端子、常開端子、および、常閉端子に導通された
3個の端子ネジ10が備えられ、かつ、この配線接続部
を覆う透明樹脂製のカバー11が支点a周りに回動開閉
可能に装備されている。
The switch body 3 is an explosion-proof type in which a switching mechanism is hermetically sealed in a switch case 8, and an operation projection 9 linked to the switching mechanism is provided at the upper end of the switch case 8 so as to be vertically displaceable. ,
On the front surface of the switch case 8, three terminal screws 10 electrically connected to a common terminal, a normally open terminal, and a normally closed terminal of the built-in switching mechanism are provided, and a transparent resin cover is provided to cover the wiring connection portion. A cover 11 is provided so as to be capable of rotating and opening around a fulcrum a.

【0021】スイッチケース8の奥端の上下には取付け
部8a,8bが突設され、これらが3本のネジ12a,
12bによってスイッチ収容室2の底面に締め込み固定
されている。また、下側の取付け部8bに装着されるネ
ジ12bによって、アース端子13が共締めで本体ケー
ス1に連結されている。
At the top and bottom of the rear end of the switch case 8, mounting portions 8a and 8b are protruded, and these are three screws 12a and 8a.
12b, it is fastened and fixed to the bottom surface of the switch housing chamber 2. The ground terminal 13 is connected to the main body case 1 by screwing together with a screw 12b mounted on the lower mounting portion 8b.

【0022】このアース端子13は、スイッチ収容室2
の内壁面とスイッチケース8との間の空間にガタつき少
なく収まる幅寸法および形状の帯板材で構成されるとと
もに、本体ケース側に連結される取付け基部13aに対
して配線接続部13bがスイッチ収容室2の開口近くに
位置するように大略Z形に屈曲して形成されている。そ
して、アース端子13の取付け基部13aをスイッチケ
ース8の取付け部8bの上に重合してネジ止め操作する
際に、取付け基部13aの上下の側縁がスイッチ収容室
2の内壁面s1 とスイッチケース8の下向き外面s2
に当接して、ネジ12bの回動操作によってアース端子
10が共回りするのが当接阻止されるようになってい
る。また、配線接続部13bにネジ14によって取り付
けられるアース線接続用の圧着端子15は、座金部15
aの横側に圧着部15bを並べた、いわゆる旗型と呼称
されるものが使用されている。この旗型の圧着端子は、
座金部と圧着部を縦列に形成したもの(丸型と呼称され
ている)のものより配線スペースが小さく、スイッチ収
容室2下部の狭い空間での配線作業が容易に行えるよう
考慮されている。
The ground terminal 13 is connected to the switch housing 2
The width and the shape of the band plate material are settled in the space between the inner wall surface of the switch case 8 and the switch case 8 with less backlash, and the wiring connection portion 13b is connected to the mounting base portion 13a connected to the main body case side. It is formed to be substantially Z-shaped so as to be located near the opening of the chamber 2. Then, the mounting base 13a of the ground terminal 13 when screwed operated by polymerizing on the mounting portion 8b of the switch case 8, the upper and lower side edges of the mounting base portion 13a and the inner wall surface s 1 of the switch housing chamber 2 switch in contact with a downward outer face s 2 of the casing 8, the ground terminal 10 by the rotating operation of the screw 12b is adapted to for co-rotation is the contact prevented. Further, a crimp terminal 15 for connecting an earth wire, which is attached to the wiring connection portion 13b with a screw 14, is provided with a washer 15
The so-called flag type in which the crimping portions 15b are arranged on the lateral side of a is used. This flag type crimp terminal
The wiring space is smaller than that in which the washer portion and the crimping portion are formed in tandem (referred to as a round shape), and it is considered that the wiring work in the narrow space below the switch housing chamber 2 can be easily performed.

【0023】本体ケース1の上部には、スイッチ本体3
の上端から付勢突出された操作突起9に対向するプラン
ジャ16が上下スライド変位可能に支持されるととも
に、このプランジャ16を上方にスライド付勢する復帰
用バネ17がプランジャ16の下端とスイッチ本体3と
の間に介装されている。なお、プランジャ16には、一
定範囲内で上下変位自在かつ内装バネ16bで下限まで
スライド付勢された可動部材16aが装備され、この可
動部材16aの下端にねじ込み装着した当接ボルト16
cがスイッチ本体3の操作突起9に直接作用するように
なっており、操作突起9のストロークとプランジャ16
のストロークとの差を可動部材16aの後退変位で吸収
するよう構成されている。
On the upper part of the main body case 1, a switch main body 3 is provided.
A plunger 16 facing the operation projection 9 urged from the upper end of the plunger 16 is supported so as to be vertically slidable, and a return spring 17 for urging the plunger 16 upward is slidably connected to the lower end of the plunger 16 and the switch body 3 It is interposed between and. The plunger 16 is provided with a movable member 16a which can be vertically displaced within a certain range and is slid to the lower limit by an internal spring 16b, and a contact bolt 16 screwed and mounted on the lower end of the movable member 16a.
c directly acts on the operation protrusion 9 of the switch body 3, and the stroke of the operation protrusion 9 and the plunger 16
Is absorbed by the retreat displacement of the movable member 16a.

【0024】本体ケース1の上端に取り付けられたヘッ
ドケース4には、プランジャ16の作動方向と直交して
操作軸20が支承されるとともに、操作軸20の突出端
部にローラ付きの操作レバー5が取り付けられている。
操作軸20のケース内突入部には偏平カム部21が形成
されており、この偏平カム部21の下面に前記プランジ
ャ16が当接されるとともに、偏平カム部21の上面に
バネ22で付勢された復帰用部材23が当接されるよう
になっている。
An operation shaft 20 is supported on the head case 4 attached to the upper end of the main body case 1 at right angles to the operation direction of the plunger 16, and an operation lever 5 with a roller is provided on a protruding end of the operation shaft 20. Is attached.
A flat cam portion 21 is formed at the projecting portion of the operation shaft 20 in the case. The plunger 16 is brought into contact with the lower surface of the flat cam portion 21, and the upper surface of the flat cam portion 21 is urged by a spring 22. The returned member 23 is brought into contact therewith.

【0025】そして、操作レバー5に外力が作用しない
自由状態では、図示のように、復帰用部材23の偏平端
面が偏平カム部21の上面に付勢押圧されることで、操
作軸20が中立位置に安定保持されるとともに、復帰用
バネ17の突き上げ作用を受けるプランジャ16が偏平
カム部21の下面に当接される。この中立状態から操作
軸20が回転作用を受けると、バネ22による復帰作用
に抗して操作軸20が回転することでプランジャ16が
偏平カム部21の下面によって、復帰用バネ17に抗し
て下方にスライド変位され、操作突起9を押し込み操作
してスイッチ本体3の内蔵スイッチング機構を切り換え
動作させ、また、操作軸20へ加えていた回転操作力を
解除すると、復帰用部材23の偏平カム部21への押圧
作用によって、操作軸20が元の中立位置まで付勢回動
されるとともに、プランジャ16も元の位置にスライド
復帰するようになっている。
In the free state in which no external force acts on the operation lever 5, the flat end surface of the return member 23 is urged against the upper surface of the flat cam portion 21 as shown in FIG. The plunger 16, which is stably held at the position and receives the push-up action of the return spring 17, comes into contact with the lower surface of the flat cam portion 21. When the operating shaft 20 receives a rotating action from the neutral state, the operating shaft 20 rotates against the returning action of the spring 22, and the plunger 16 is opposed to the returning spring 17 by the lower surface of the flat cam portion 21. When it is slid downward, the operation protrusion 9 is pushed in, the built-in switching mechanism of the switch body 3 is switched, and when the rotational operation force applied to the operation shaft 20 is released, the flat cam portion of the return member 23 is released. The operation shaft 20 is urged and rotated to the original neutral position by the pressing action on the plunger 21, and the plunger 16 is slid back to the original position.

【0026】なお、上記実施形態ではスイッチ本体3と
して、スイッチケース8内にスイッチング機構を内蔵密
封した防爆機能を備えたものを使用しているが、防爆機
能を備えないものを使用する場合にも本発明を適用する
ことができる。
In the above-described embodiment, the switch body 3 having the explosion-proof function in which the switching mechanism is built in and sealed in the switch case 8 is used. The present invention can be applied.

【0027】[0027]

【発明の効果】以上の説明から明らかなように、本発明
によると以下のような効果が期待できる。
As is apparent from the above description, the following effects can be expected according to the present invention.

【0028】請求項1に係る発明のリミットスイッチに
よると、スイッチ収容室の開口近くまで配線接続部を延
出したアース端子を導入したので、スイッチ収容室に残
された狭い空間においてもアース端子への配線作業を行
えるようになり、スイッチ収容室を極力小さくしてリミ
ットスイッチ全体の小型化を図りながらアースの取り出
しを容易に行うことが可能となった。
According to the limit switch of the first aspect of the present invention, since the ground terminal extending from the wiring connection portion to the vicinity of the opening of the switch housing is introduced, the ground terminal can be connected to the ground even in a narrow space left in the switch housing. In this way, the wiring work can be performed, and it is possible to easily take out the ground while minimizing the size of the entire limit switch by minimizing the size of the switch accommodating chamber.

【0029】請求項2に係る発明のリミットスイッチに
よると、アース端子を設置するための専用のスペースを
本体ケース内に形成する必要がなく、スイッチ収容室を
スイッチ本体を収容するに足りる最小限の大きさにで
き、リミットスイッチ全体の小型化に一層有効となる。
また、ネジの共用によって部品点数の節減が行えるとと
もに、ネジ締め箇所を少なくできて組付け作業性を高め
る上でも有効となる。
According to the limit switch of the second aspect of the present invention, it is not necessary to form a dedicated space for installing the ground terminal in the main body case, and the switch accommodating chamber has a minimum size enough to accommodate the switch main body. The size can be increased, which is more effective for reducing the size of the entire limit switch.
In addition, the number of parts can be reduced by sharing the screws, and the number of screw tightening points can be reduced, which is effective in improving the assembling workability.

【0030】請求項3に係る発明のリミットスイッチに
よると、アース端子をネジ止めする際の共回りを簡単に
防止でき、組付け作業性を高いものにすることができ
る。
According to the limit switch of the third aspect of the present invention, co-rotation when screwing the ground terminal can be easily prevented, and assembling workability can be improved.

【0031】請求項4に係る発明のリミットスイッチに
よると、小型でありながら防爆機能が高く、しかも、ア
ース配線作業性に優れたものにできる。
According to the limit switch of the fourth aspect of the invention, the explosion-proof function is high despite being small, and the workability of ground wiring can be improved.

【図面の簡単な説明】[Brief description of the drawings]

【図1】リミットスイッチの全体斜視図FIG. 1 is an overall perspective view of a limit switch.

【図2】リミットスイッチの縦断側面図FIG. 2 is a longitudinal sectional side view of a limit switch.

【図3】リミットスイッチの正面図FIG. 3 is a front view of a limit switch.

【図4】リミットスイッチの分解斜視図FIG. 4 is an exploded perspective view of a limit switch.

【符号の説明】[Explanation of symbols]

1 本体ケース 2 スイッチ収容室 3 スイッチ本体 8 スイッチケース 8b 取付け部 12b ネジ 13 アース端子 13a 取付け部 13b 配線接続部 15 圧着端子 s1 スイッチ収容室の内壁面 s2 スイッチ本体の外面DESCRIPTION OF SYMBOLS 1 Main body case 2 Switch accommodation room 3 Switch main body 8 Switch case 8b Attachment part 12b Screw 13 Ground terminal 13a Attachment part 13b Wiring connection part 15 Crimp terminal s 1 Inner wall surface of switch accommodation room s 2 Outer surface of switch body

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 金属製の本体ケースに、前面から開閉可
能なスイッチ収容室を形成し、このスイッチ収容室にス
イッチ本体を収容固定したリミットスイッチにおいて、 前記スイッチ収容室の内壁面と前記スイッチ本体との間
に形成された空間にアース端子を配備し、このアース端
子の一端側の取付け基部をスイッチ収容室の内奥にネジ
止め固定するとともに、アース端子の他端側をスイッチ
収容室の前面側へ延出させ、その延出端に配線接続部を
形成してあることを特徴とするリミットスイッチ。
1. A limit switch in which a switch housing chamber that can be opened and closed from the front is formed in a metal main body case, and the switch body is housed and fixed in the switch housing chamber, wherein an inner wall surface of the switch housing chamber and the switch body are provided. A ground terminal is provided in a space formed between the switch terminal and the mounting base at one end of the ground terminal. A limit switch having a wiring connection portion formed at the extension end thereof.
【請求項2】 前記スイッチ本体から突設した取付け部
に前記アース端子の取付け基部を重合して、共通のネジ
で本体ケースに共締め固定してある請求項1記載のリミ
ットスイッチ。
2. The limit switch according to claim 1, wherein the mounting base of the ground terminal overlaps a mounting portion protruding from the switch main body, and is fixedly fastened to the main body case with a common screw.
【請求項3】 前記アース端子は、その取付け基部のネ
ジ止め固定前の状態において、前記スイッチ収容室の内
壁面とスイッチ本体の外面とに当接して回り止め支持さ
れる請求項1または2に記載のリミットスイッチ。
3. The switch according to claim 1, wherein the ground terminal abuts against an inner wall surface of the switch accommodating chamber and an outer surface of the switch body before the mounting base is screwed and fixed. The described limit switch.
【請求項4】 前記スイッチ本体が、スイッチケースに
スイッチング機構を密封内蔵した防爆型である請求項1
ないし3のいずれかに記載のリミットスイッチ。
4. The explosion-proof type wherein the switch body has a switching case hermetically incorporated in a switch case.
4. The limit switch according to any one of items 1 to 3.
JP4942698A 1998-03-02 1998-03-02 Limit switch Pending JPH11250768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4942698A JPH11250768A (en) 1998-03-02 1998-03-02 Limit switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4942698A JPH11250768A (en) 1998-03-02 1998-03-02 Limit switch

Publications (1)

Publication Number Publication Date
JPH11250768A true JPH11250768A (en) 1999-09-17

Family

ID=12830779

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4942698A Pending JPH11250768A (en) 1998-03-02 1998-03-02 Limit switch

Country Status (1)

Country Link
JP (1) JPH11250768A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009026316A3 (en) * 2007-08-23 2009-04-30 Honeywell Int Inc Explosion proof safety switch apparatus
EP3038121A1 (en) * 2014-12-24 2016-06-29 Omron Corporation Limit switch
KR20190035518A (en) * 2017-09-25 2019-04-03 바다중공업 주식회사 Explosion proof type limit switch
JP2019160686A (en) * 2018-03-15 2019-09-19 オムロン株式会社 Photoelectronic sensor and manufacturing method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009026316A3 (en) * 2007-08-23 2009-04-30 Honeywell Int Inc Explosion proof safety switch apparatus
EP3038121A1 (en) * 2014-12-24 2016-06-29 Omron Corporation Limit switch
CN105742102A (en) * 2014-12-24 2016-07-06 欧姆龙株式会社 Limit switch
US9865414B2 (en) 2014-12-24 2018-01-09 Omron Corporation Limit switch
KR20190035518A (en) * 2017-09-25 2019-04-03 바다중공업 주식회사 Explosion proof type limit switch
JP2019160686A (en) * 2018-03-15 2019-09-19 オムロン株式会社 Photoelectronic sensor and manufacturing method thereof

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