JPH0945206A - Contact switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the safety of surrounding work without a lock means flipping out suddenly by providing a lock means so that the quantity of its shifting may be regulated when it takes off the occupation of space for movement of a mobile part or a interlock part. SOLUTION: Rotating a knob 17 for operation with a shaft 15 as its axis of rotation will release the lock between the lock pin 16b and the groove of the body 13, but at this time, a lock means EE shifts outward of a housing DD with the energizing force of a return spring 18, that is, in the direction of taking off the occupation of space for movement. The lock pin 16 abuts on the groove of the case 12, and the quantity of the shifting in its direction is regulated. Hereby, a person working in circumference never gets in dangerous condition, and he can do without work of removing the occupation of space for movement, and can break a fixed contact slightly fused together surely from the mobile contact.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact switchgear used for a power load relay, an electromagnetic switch and the like.

[0002]

2. Description of the Related Art Conventionally, as this kind of contact switching device, FIG.
There are configurations shown in 18 and FIG. This one is
A contact portion A which has a movable contact point A ₂ toward or away the fixed contact A ₁ and the fixed contact A _1, one end of the movable contact A ₂ a movable shaft A ₄ are continuously provided in the movable contact A ₃ provided An electromagnet device (driving member) B having a movable part B ₁ that is driven to move so as to open and close the contact part A, a housing C that houses the contact part A and the electromagnet device B, and the contact part A is kept in an off state. Locking means D that can be locked to the housing C so that

More specifically, the locking means D comprises a movable pin D ₁ and a locking pin D ₂ . The movable pin D ₁ is formed in a substantially U shape by a central piece and both facing pieces that are connected to the other end of the movable shaft A ₄ , and extending pieces are extended from the tips of both facing pieces toward each other. ing. When the contact portion A is off, the movable pin D ₁ projects from the communication hole C ₁ communicating with the outside of the housing C so that the inner surface of the central piece is flush with the outer surface of the housing C. And contact A is on,
The movable pin D ₁ operates so as to further project outward. A pair of L-shaped fixing pins C ₂ are provided on the outer surface of the housing C adjacent to the outer opening of the communication hole C ₁ . And the movable pin D ₁ is
The T-shaped locking pin D ₂ with a narrow width at one end in a state protruding from C ₁ is a movable pin from the one end side with a special tool.
When it is inserted inward of D ₁ , it is locked inside the movable pin D _{1 and also on} the inner surface of the fixed pin C ₂ of the housing C and the outer surface of the housing C 1.

[0004]

In the above-mentioned conventional contact switchgear, when the contact portion A is in the off state, as described above, the locking means D locks the housing C mechanically. is from the maintained, when you are working, such as adjustment and inspection of the moving part B ₁ by stopping the energization of the electromagnetic device B, erroneous electromagnet device movable portion B ₁ be energized B by moving Therefore, it is possible to perform work such as adjustment and inspection of the movable part B _{1 in} a safe state.

However, this is an electromagnet device B
Since the movable pin D ₁ that also protrudes outward of the housing C operates with the operation of the movable part B ₁ of the above, the switch for turning on and off the electric power to the electromagnet device B is
If the switch is located away from this object, and if the switch is operated unexpectedly, the movable pin D ₁ will suddenly move, which may cause a hazard to persons working around this object. There is a risk of becoming.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a contact opening / closing device that does not put a worker working in the surroundings in a dangerous state.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 is provided with a movable contact and a contact portion having a fixed contact and a movable contact coming in and out of contact with the fixed contact. A drive member having a movable portion that is movable to open and close the contact portion by driving one end of a movable shaft that is connected to the movable contact, a housing that houses the contact portion and the drive member, and an off state of the contact portion. In the contact opening / closing device, the locking means can be locked to the housing so as to maintain the movable space, and the locking means has a movable space in which the movable part or an interlocking part interlocking with the movable part is movable in the housing. Occupying the occupant and being movable so as to maintain the off state.

According to a second aspect of the present invention, in the first aspect, the locking means urges the movable space to occupy the movable space when the locking with the housing is released. Means are provided.

According to a third aspect of the present invention, in the first aspect, the locking means is in the same direction as the contact opening / closing direction so as to occupy the movable space of the movable portion or the interlocking portion interlocking with the movable portion. The movable portion is brought into contact with the movable portion when moved to.

According to a fourth aspect of the present invention, in the third aspect, the locking means and the movable portion are formed in a rod shape having the same axial center and the axial direction being the same direction as the contact opening / closing direction. It has a set configuration.

According to a fifth aspect of the present invention, in the first aspect of the present invention, there is provided a regulating means for regulating a moving amount when the locking means moves in a direction of removing the occupation of the movable space. ing.

According to a sixth aspect of the present invention, in the fifth aspect, the regulating means is provided in the housing.

According to a seventh aspect of the present invention, in the first aspect, the locking means is movably provided in a direction orthogonal to the contact opening / closing direction.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. This is the contact point A
A, an electromagnet device (driving member) BB, a connecting member CC, a housing DD, and a locking means EE.

First, the contact portion AA will be described. The contact point AA is a container 1, a fixed electrode 2, a movable contact 3, a movable shaft 4, a contact spring.
5, a return spring 6, and a magnetic means (not shown). The container 1 is composed of a container body 1a, which is made of a heat-resistant material such as ceramic and has one surface opened into a box shape, and a lid body 1c made of 42 alloy or the like and having a through hole 1b in the center. Further, a flat plate-like insulating plate (not shown) made of a heat resistant material such as ceramic is fitted inside the lid body 1c to protect the lid body 1c from an arc. The fixed electrode 2 is made of a copper-based plate material and has an L-shape, and a fixed contact 2a is fixed to one of the pieces. The fixed contact 2a may be made of the same material as the fixed electrode 2 and integrally provided. The movable contact 3 is made of a copper-based plate material and has movable contacts 3a at both ends thereof at an interval allowing contact with and separation from the fixed contact 2a. The movable contact 3a may be integrally formed of the same material as the movable contactor 3. The movable shaft 4 is connected to the movable contactor 3, is formed in a round bar shape, and has one end protruding from the container 1. The contact pressure spring 5 is formed in a coil shape, and the movable contact point 3a is connected to the fixed contact 2a of the movable shaft 4.
It is urged in the direction of contact with. The return spring 6 is formed in a coil shape and biases the movable contact 3 in a direction in which the movable contact 3a is separated from the fixed contact 2a. The magnetic means is composed of a permanent magnet and a yoke sandwiching the permanent magnet, and is attached to the outer surface of the container 1 so that the yoke sandwiches the fixed contact 2a and the movable contact 3a.
Therefore, the magnetic means applies a magnetic field in a direction orthogonal to the operation direction of the movable contact 3a in the space where both the contacts 2a and 3a exist.

Next, the electromagnet device BB will be described. The electromagnet device BB includes a coil 7, a coil frame 8 and a movable iron core (movable part) 9.
, Is provided with a yoke 10. Coil 7 is coil frame 8
It is wound around. The movable core 9 has a cylindrical shape in which one end of a rod-shaped movable shaft 9a is fixed to one end of the coil 7
The insertion hole of the coil frame 8 is moved in the axial direction by the excitation of.
The yoke 10 is formed so as to surround the coil 7, and has an insertion hole 10a through which the movable shaft 9a is inserted.

Next, the connecting member CC will be described. Connection member CC
Is for connecting the other end of the movable shaft 9a and one end of the movable shaft 4, and is formed in a substantially rectangular parallelepiped shape by a molding material having an insulating property or the like. This connecting member CC has high bending strength and tensile strength and is lightweight so as not to be deformed or damaged by various spring loads of the contact portion AA, the attraction force of the electromagnet device BB, and the impact at the time of welding. Things are used. The connecting member CC is an interlocking portion 11 that interlocks with the movement of the movable iron core 9 of the electromagnet device BB, which will be described later in detail.

Next, the housing DD will be described. The housing DD includes a case 12, a body 13, and a base 14, and accommodates the contact portion AA, the driving member BB, and the connecting member CC together.

The case 12 is formed in a substantially box shape having an opening 12c on one side by disposing a wall plate 12b around the bottom plate 12a. The outer surface of the bottom plate 12a of the case 12 has a pair of opposing walls 12d on both sides, a connecting wall 12e for connecting between the opposing walls 12d, and a central portion of the connecting wall 12e extending parallel to the opposing wall 12d from both sides. The first partition wall 12f is erected and divided into four parts. And, at the four outer surfaces of the partition, communication holes 12 communicating inward are formed.
g are provided respectively, and the fixed electrode 2 of the contact portion AA is inserted into the communication hole 12g. In addition, this case 12 is a bottom plate 12
A central part of the connecting wall 12e and a second partition wall 12h that overlaps the first partition wall 12f are provided on the inner side of a with the bottom plate 12a interposed therebetween, and the bottom plate 12a extends from the front end surface of the central part of the connecting wall 12e. Through hole 12 that penetrates through to the tip surface of the second partition wall 12h
j is provided. The through hole 12j has a substantially circular opening cross section, but it is the same as the through hole 12j in the direction away from two opposing locations on the circumference, that is, in the direction parallel to the first partition wall 12f. Depth of cut 12k
Have been cut into each. Further, the through hole 12j is provided with a step portion 12m at a substantially middle portion.

The body 13 is formed in a substantially rectangular tube shape, and has a screw hole 13a formed at one end opening side. This body 13
In the center part, the contact wall AA and the electromagnet device BB are formed by the isolation wall 13b.
Are separated from each other, and a partition wall 13c joined to the second partition wall 12h of the case 12 is erected from the partition wall 13b to the contact portion AA side. The partition wall 13c is for partitioning the inner contact portion AA side of the body 13 into two parts.
The overlapping hole 13d having a circular opening cross-section and overlapping with 12j is provided so as to penetrate therethrough. In addition, the contact wall AA is attached to the isolation wall 13b.
There are provided two insertion holes 13e through which the movable shaft 4 is inserted and two projecting portions 13f projecting toward the electromagnet device BB side.
This protrusion 13f determines the position of the yoke 10 of the electromagnet device BB provided. The base 14 is provided with a screw hole 14a.

Next, the locking means EE will be described. This device comprises a shaft 15, a locking pin 16, an operating knob 17, a return spring (biasing means) 18, and a regulating means 19.

The shaft 15 is made of a metallic material. It is not deformed even when a strong stress is applied by the electromagnet device BB and it has good workability, and it is a locking pin provided at one end.
This is because a strong stress is also applied to 16. Desirably, non-magnetic stainless steel is preferable. This shaft 15
A mounting groove that has the same axial center as the movable shaft 4 of the contact portion AA and is formed in a rod shape whose axial direction is the same direction as the contact opening / closing direction, and at one end of which a regulating ring 19a, which is the regulating means 19 described later, is mounted.
Around 15a is provided. The dimensions of the shaft 15 will be described later in detail, but the movable iron core 9 of the electromagnet device BB,
Specifically, when the operating knob 17 is pushed so as to occupy the movable space S of the movable shaft 9a, one end of the operating knob 17 connected to the other end of the movable shaft 9a is contacted with the other end of the movable shaft 9a. One surface is designed to abut the tip surface of the connecting wall 12e of the case 12.

The locking pin 16 is provided slightly closer to the center than the mounting groove 15a of the shaft 15 so as to project in the direction orthogonal to the axial direction of the shaft 15.

The operating knob 17 includes a disc portion 17a and a substantially half-moon shaped operating portion 17b which is continuously provided from the other surface of the disc portion 17a.
Consists of When the operating knob 17 is pushed in as described above, one side of the disc portion 17a is connected to the connecting wall of the case 12.
By contacting the tip surface of 12e, further pushing is restricted, and the other end of the movable shaft 9a is not pushed more than necessary. Since the operating knob 17 rotates the shaft 15 while pushing it in, the strength does not have to be so strong, but in consideration of safety and usability, an insulating member such as a molded product is suitable. The shape of the operation knob 17 is not particularly limited, but it must be one that can be rotated while being pushed in with a finger. Further, if the operating knob 17 is increased, the rotating torque also increases. However, if the rotating torque is too large, the housing DD may be damaged. Therefore, an appropriate size is desirable.

The return spring (biasing means) 18 is inserted through the shaft 15 of the locking means EE, and when the shaft 15 is inserted into the through hole 12j of the case 12 from one end thereof, Abut on the stepped portion 12m of the through hole 12j.

The restricting means 19 is a restricting ring 19a composed of a C ring, and has a strength capable of withstanding the urging force of the return spring 18. The restriction ring 19a may be an E ring.

Next, the assembly procedure will be described. First, as shown in FIG. 1, two contact portions AA are assembled and fixed to the case 12 with an elastic member 20 for absorbing the dimensional tolerance interposed therebetween. Then the locking means EE is the shaft
Insert the shaft 15 into the through hole 12j so that the locking pin 16 at one end of the shaft 15 is located in the notch 12k of the through hole 12j, and then the mounting groove 15a at one end of the shaft 15 protruding from the inner opening. Attach the restriction ring 19a to. After that, the case 12 and the body 13 are joined by a joining means (not shown) including a screwing member or a fitting member such as a leaf spring or an E ring.

Then, the connecting member CC and the electromagnet device BB are assembled in the body 13. For details, the electromagnet device BB is the yoke
10 is positioned by the protrusion 13f of the body 13. Finally, with the elastic spring 21 interposed between the electromagnet device BB, the screw 22 is screwed into the screw hole 14a of the base 14 and the screw hole (not shown) of the body 13 to open / close the contact. The device is assembled.

Next, the operation of this one will be described.
When the movable core 9 is attracted to the yoke 10 by the excitation of the coil 7 and a driving force is generated, the movable shaft 9a fixed to the movable core 9 moves, and the connecting member CC connecting the movable shaft 9a provides the driving force. One end of the movable shaft 4 is driven by this driving force, which is greater than the spring force of the return spring 6, so that the movable contact 3a of the movable contact 3 comes into contact with the fixed contact 2a. After that, the movable shaft 4 is also pressed by a predetermined overtravel amount by the spring force of the contact pressure spring 5. When the coil 7 is de-energized, the movable contact 3 is returned by the urging force of the contact pressure spring 5 and the return spring 6, etc.
The movable contact 3a is separated from the fixed contact 2a, and the movable iron core 9 also returns a predetermined distance and returns to the original state until the movable iron core 9 is restricted by the elastic spring 21. Then, the arc generated between the contacts at the time of restoration is sufficiently extended toward both ends of the movable contactor by the magnetic field of the magnetic means (not shown) and extinguished.

Next, referring to FIGS. 5 (a) to 5 (c), the operation of pushing the operating knob 17 so as to occupy the movable iron core 9 of the electromagnet device BB, more specifically, the movable space S of the movable shaft 9a, will be described. To do.

In the state before the operation knob 17 is pushed in, the locking means EE, as shown in FIG.
Is brought into contact with the tip surface of the second partition wall 12h and the return spring 18 is brought into contact with the step portion 12m of the through hole 12j.
It is positioned by restricting movement of the DD inward and outward. In this state, the movable iron core 9 of the electromagnet device BB, more specifically, the movable shaft 9a, is movable with respect to one end of the movable shaft 4 when the coil 7 is excited. That is, the movable space S of the movable iron core 9 is between the other end of the movable shaft 9a and one end of the movable shaft 4. The dimension L ₁ of the movable space S in the contact opening / closing direction is
The coil 7 has a distance equal to or larger than the dimension L ₂ of the driving stroke between the movable iron core 9 and the yoke 10 before being excited.

Next, the operation knob 17 is directed toward the inside of the housing DD, as shown in FIG.
When the disk portion 17a of the shaft is pressed against the urging force of the return spring 18 until it abuts against the tip surface of the connecting wall 12e of the housing, one end of the shaft 15 occupies the movable space S of the movable iron core 9, The movable shaft 9a comes into contact with the center of the other end of the shaft.

Next, the operation knob is pushed in a state of being pushed against the restoring force of the return spring 18 which is going to be extended.
When 17 is rotated 90 ° to the left or right around shaft 15 as an axis, locking pin 16 will move to the housing as shown in Fig. 6 (c).
Lock the tip of the second partition wall 12h of the DD. The locking force at this time is not only the locking force between the locking pin 16 and the tip surface of the second partition wall 12h, but also the urging force of the return spring 18.

Then, when the operating knob 17 is further rotated 90 ° about the shaft 15, as shown in FIG.
The locking between the locking pin 16 and the tip surface of the second partition wall 12h of the housing DD is released, but at this time, the locking means EE is
By the biasing force of the return spring 18, as shown in (a) of the same figure, toward the outside of the housing DD, that is, the locking means.
The EE moves in a direction that removes the occupation of the movable space S, the regulation ring 19a abuts on the tip surface of the second partition wall 12h, and the movement amount in that direction is regulated.

In such a contact opening / closing device, the locking means EE which moves so as to occupy the movable space S in which the movable iron core 9, specifically, the movable shaft 9a is movable in the housing DD, and locks it in the housing DD. , Even if the movable iron core 9 of the electromagnet device BB operates when it is not locked, it suddenly projects to the outside of the housing DD due to the operation of the movable iron core 9. Since such an action does not occur, a person who works in the surroundings is not in a dangerous state.

Further, the locking means EE, which is unlocked from the housing DD, is urged by the return spring 18 so as to release the occupation of the movable space S, so that the occupation of the movable space S is not removed. Live.

The locking means EE is a movable space of the movable iron core 9.
By moving in the contact opening / closing direction so as to occupy S and contacting the movable iron core 9, it is possible to separate the fixed contact 2a and the movable contact 3a that are slightly welded.

Further, the kinetic energy in the moving direction of the locking means EE is concentrated from the locking means EE at one point, that is, the axis center, by the locking means EE contacting the movable iron core 9. Since it is propagated to 9, the fixed contact 2a is more reliable.
It is possible to separate the slight welding between the movable contact 3a and the movable contact 3a.

Further, since the amount of movement of the locking means EE in the direction for removing the occupation of the movable space S is restricted by the restriction ring 19a, it does not come off from the housing DD when moving in that direction.

Next, a second embodiment of the present invention will be described below with reference to FIGS. The same members as those in the first embodiment are designated by the same reference numerals, and only different points from the first embodiment will be described. In the first embodiment, the regulation means
In contrast to the regulation ring 19a, 19 is provided with the housing DD in the present embodiment.

More specifically, the overlapping hole 13d of the body 13 of the housing DD has two notches 13g formed at two opposite positions on the circumference, like the through hole 12j of the case 12. The line connecting both notches 13g is the through hole 12j of the case 12.
It is designed to be orthogonal to the line connecting the notches 12k. Further, the body 13 has a cutout 12k in the through hole 12j of the case 12.
A groove 13h that overlaps with is provided at the opening edge on the electromagnet device BB side. In addition, in the case 12, a groove 12n that overlaps with the cut portion 13g of the overlapping hole 13d of the body 13 is formed in the through hole 12j on the body 13 side.
Is provided at the opening edge. In this way, case 12
By providing the through hole 12j of the housing 12 and the overlapping hole 13d orthogonal to the through hole 12j, the restricting means 19 becomes
Is provided. In addition, the locking means EE by the regulation means 19
The regulation of the operation of will be described later in detail.

Next, the assembly procedure will be described with reference to FIG. First, as in the first embodiment, the two contact portions AA are assembled and fixed in the case 12. Then the locking means EE
The locking pin 16 at one end of the shaft 15 through hole 12j
Insert the shaft 15 through the hole 12j so that it is located in the notch 12k
, And the operation knob 17 is rotated by 90 ° about the shaft 15 with the return spring 18 pressed against the urging force of the return spring 18, the locking pin 16 moves to the opening edge of the case 12. The feeling of being locked and positioned in the groove 12n is confirmed. Hereinafter, assembling in the same manner as the first embodiment,
Contact switchgear is assembled.

Next, referring to FIGS. 9 (a) to 9 (c), the operation of pushing in the operating knob 17 so as to occupy the movable iron core 9 of the electromagnet device BB, more specifically, the movable space S of the movable shaft 9a, will be described. To do.

In the state before the operation knob 17 is pushed in, the locking means EE is positioned by locking the locking pin 16 in the groove 12n at the opening edge of the case 12, as shown in FIG. ing. Next, turn the operating knob 17 toward the inside of the housing DD and, as shown in Fig. 2 (b), the disk portion of the operating knob 17
Pushing the isolation wall 13b by the thickness equivalent to the thickness of the isolation wall 13b against the biasing force of the return spring 18 until 17a contacts the tip of the connecting wall 12e of the housing DD, one end of the shaft 15 moves to the movable iron core 9
The movable space S is occupied and abuts on the axial center of the other end of the movable shaft 9a.

Next, with the return spring 18 pushed in against the urging force of the extension spring, the operating knob is pressed.
When 17 is rotated 90 ° to the left or right around the shaft 15, the locking pin 16 is locked in the groove 13h provided at the opening edge of the overlapping hole 13d of the body 13, as shown in FIG. The locked feeling is confirmed.

Then, when the operating knob 17 is further rotated 90 ° around the shaft 15, as shown in FIG.
The engagement between the engagement pin 16 and the groove 13h of the body 13 is released. At this time, the engagement means EE is acted on by the biasing force of the return spring 18 as shown in FIG. Of the locking space EE, that is, the locking means EE moves in the direction to remove the occupation of the movable space S, the locking pin 16 abuts the groove 12n of the case 12, and the amount of movement in that direction is restricted.

In this contact opening / closing device, similarly to the first embodiment, the worker working in the surroundings does not become in a dangerous state, and the work for removing the occupation of the movable space S can be eliminated.
The fixed contact 2a and the movable contact 3a that are slightly welded can be reliably separated.

The amount of movement of the locking means EE in the direction for removing the occupation of the movable space S is restricted by the restriction means 19 provided in the housing DD. It will not come off.

Further, since the regulating means 19 is provided in the housing DD, it is not necessary to provide the regulating means 19 as a separate member unlike the regulating ring 19a of the first embodiment.

Next, a third embodiment of the present invention will be described with reference to FIGS.
This will be described below based on No. 11. The same members as those in the first embodiment are designated by the same reference numerals, and only different points from the first embodiment will be described. In the first embodiment, the locking means
While the EE is provided so as to be movable in the same direction as the contact opening / closing direction, in the present embodiment, the EE is provided so as to be movable in a direction orthogonal to the contact opening / closing direction.

Specifically, the housing DD has neither the through hole 12j of the case 12 nor the overlapping hole 13d of the body 13,
The body 13 is provided with a lateral hole 13j through which the locking means EE penetrates on the side wall slightly closer to the electromagnet device BB than the isolation wall 13b. In addition, the first projection 13k protruding toward the electromagnet device BB is provided on the isolation wall 13b near the lateral hole 13j.
A pair of second protrusions (regulating means) 13m protruding in the same direction are provided inward of 13k.

The locking means EE is composed of a lever 23 made of an insulating resin material and having a central piece and both facing pieces and formed in a substantially U-shape. Is provided with a triangular locking projection 23a, and the inner surface of the central piece and the first projection 13k of the body 13 are connected by a return spring 18.

Next, based on FIGS. 10 (a) and 10 (b) and FIGS. 11 (a) and 11 (b), the movable iron core 9 of the electromagnet device BB, specifically, the movable space S of the movable shaft 9a is occupied. Like lever 23
The operation of pushing in will be described.

In the state before the lever 23 is pushed in,
As shown in FIGS. 10 (a) and 11 (a), the locking projection 23a is locked to the outer opening edge of the lateral hole 13j, and the second projection 13m is brought into contact with the inner side of the central piece and positioned. ing. Next, the locking means
In order to reduce the facing distance between the two facing pieces of EE, resisting the restoring force of the return spring 18 that is being shortened, pinch with your finger and push it into the lateral hole 13j in the direction orthogonal to the contact opening / closing direction, The central piece occupies the movable space S of the movable iron core 9. Specifically, between the locking means EE and the isolation wall 13b and the lever.
As shown in Fig. 11 (b), there is a very small gap between the movable shaft 9a and the movable shaft 9a.
It is smaller than the distance between the movable contact 3a and the movable contact 3a. At this time, the locking projections 23a on both facing pieces of the lever 23 are
Since it is located inward of the lateral hole 13j, the return spring 18 tries to shorten the return spring even if you release your finger.
As shown in FIG. 10 (b), it is locked and positioned by being pressed against the inner opening edge.

Then, when the fingers are pinched so that the facing distance between the facing pieces of the lever 23 becomes small, the lateral holes of the lever 23 and the body 13 are formed.
The locking with the inner opening edge of 13j is released, but at this time,
The lever 23 is moved by the urging force of the return spring 18 to
As shown in (a), the lever 23 moves toward the outside of the housing DD, that is, in the direction of removing the occupation of the movable space S, and the inner surface of the central piece abuts against the second protrusion 13m. The amount of movement in the direction is regulated.

In this contact opening / closing device, similarly to the first embodiment, a worker working in the surroundings does not become in a dangerous state, and the work for removing the occupation of the movable space S can be avoided. it can.

Further, since the regulating means 19 is provided in the housing DD, it does not move more than necessary, and further, unlike the regulating ring 19a of the first embodiment, the regulating means 19 is not provided as a separate member. Is also getting better.

Next, a fourth embodiment of the present invention will be described with reference to FIGS.
13 will be described below. The same members as those in the third embodiment are designated by the same reference numerals, and only different points from those in the third embodiment will be described. In the third embodiment, the locking means
The EE is provided so as to occupy the movable iron core 9 of the electromagnet device BB, specifically, the movable space S of the movable shaft 9a, whereas in the present embodiment, it is provided so as to occupy the movable space S of the interlocking portion 11. It has been configured.

Specifically, the rod-shaped movable shaft 9a has a unique contact portion AA on the axial extension line, and the movable shaft 4 of the contact portion AA and the movable shaft 9a of the electromagnet device BB are connected to each other.
Directly connected by CC, movable shaft 9a and isolation wall 13b
There is no movable space S between the movable iron core 9 and, more specifically, the movable shaft 9a, but an interlocking part that works together with the movement of the movable iron core 9
Between the connecting member CC, which is 11, and the isolation wall 13b, the interlocking portion 11
Has a movable space S. Further, the tip of the central piece of the lever 23 is formed in a bifurcated shape.

In such a contact opening / closing device, only one contact portion is provided on the axial extension line of the rod-shaped movable shaft 9a.
Movable iron core 9 with AA and locking means EE in the contact opening direction
, To be more specific, it cannot move from the axial direction of the movable shaft 9a to occupy the movable space S of the movable iron core 9, but by moving in the direction orthogonal to the contact opening / closing direction as shown by the arrow in Fig. 13 (a). As shown in FIG. 6B, since the movable space S of the connecting member 11 which is the interlocking portion 11 interlocking with the movable iron core 9 is occupied, the same effect as that of the third embodiment can be obtained. .

Next, a fifth embodiment of the present invention will be described with reference to FIGS.
It will be described below based on 17. The same members as those in the third embodiment are designated by the same reference numerals, and only different points from those in the third embodiment will be described. Further, in FIG. 14, the contact portion AA and the housing DD are omitted. In the third embodiment, the lever 23 is designed to be pushed in by being pinched with a finger, whereas in the present embodiment, the lever 23 and the lever 23 form a locking means EE and are slid on the outer surface of the body 13. It is configured to be pulled out by the slide piece 24.

Specifically, the other end of the movable shaft 9a is led out from a disk-shaped base 11a provided on the connecting member CC. The lever 23 has a substantially rectangular parallelepiped shape, and has a rectangular hole 23b penetrating one end in the longitudinal direction, and a small cross-section 23c and a large penetrating part 23d at the other end from the center, and has a gourd-like cross section. Hole 23e is provided. This small penetration 23c
Although it has an inner diameter that allows the movable shaft 4 to be inserted, the connecting member CC
While it does not have an inner diameter that allows the base part 11a of
The large penetrating portion 23d has an inner diameter that allows the base portion 11a of the connecting member CC to be inserted therethrough. A cut 23f is provided at the center of the other end of the lever 23 in the lateral direction.
The inner surface of f and the inner surface of the body 13 facing the inner surface are connected by a return spring 18.

The slide piece 24 is formed in a substantially L shape by the one piece and the other piece having a pointed tip, and push-out projections 24a having a semicircular cross section are provided on both side surfaces of the one piece. The slide piece 24 is mounted between a pair of elastic L-shaped engagement pieces 13n provided upright on the outer surface of the body 13.
This slide piece 24 is restricted from moving toward the rear end direction of one piece by a restriction projection 13p provided on the outer surface of the body 13, and a pair of L-shaped engagement pieces 13n push out and spread the projection 24a.
Is abutted against and positioned.

Next, based on FIGS. 16 (a) and (b) and FIGS. 17 (a) and (b), the movable iron core 9 of the electromagnet device BB, more specifically, the movable space S of the movable shaft 9a, is occupied. Like lever 23
The operation of pulling out will be described.

In the lever 23, before the slide piece 24 is slid, as shown in FIG. 16 (a), the base portion 11a of the connecting member CC and the large penetrating portion 23d of the insertion hole 23e are overlapped with each other. ,
As described above, the base portion 11a is in a state of being able to pass through the large penetration portion 23d. At this time, one end of the lever 23 is
As shown in 17 (a), the body 13 is slightly projected from the lateral hole 13j, and a part of the square hole 23b is partially located outside the body 13.

In this state, when the other piece is grasped and slid toward the tip of the other piece, the push-out projection 24a is formed into a pair of L
By widening the facing interval of the character-shaped engaging pieces 13n,
The facing interval is slightly opened, and the slide piece 24 can be slid toward the tip of the one piece. When the slide piece 24 is slid further toward the tip of one of the pieces, the pointed tip of the slide piece 24 is inserted into the square hole 23b partially located outside the body 13 so that the square hole 23b enters. With the slide piece 24 that has entered, the lever 23 resists the urging force of the return spring 18 that is trying to be shortened, as shown in FIGS. 16 (b) and 17 (b). The square hole 23b located outside of the square hole 23b is pulled out to a larger area. Then, the base 11a of the connecting member CC
As shown in Fig. 16 (b), the large penetration part 23d of the insertion hole 23e
And approximately half of the small penetrating portion 23c are overlapped with each other, so that they cannot be inserted. At this time, slide piece 24
Is locked by being pressed against the outer surface of the body 13 of the housing DD by the urging force of the return spring 18 that tries to shorten.

Then, slide the slide piece 24 in the opposite direction to the above,
In other words, when the slide piece 24 is slid toward the rear end, the tip of the slide piece 24 comes out of the square hole 23b, and as shown in Fig. 16 (a), the slide piece 24 and the outer surface of the body 13 of the housing DD are separated. The locking is released, but at this time, the lever 23 is biased by the return spring 18 toward the inside of the housing DD, that is, the lever 23 moves in the movable space S as shown in FIG. 16 (a). Move in the direction to remove the occupation of.

In such a contact opening / closing device, only one contact portion is provided on the axial extension line of the rod-shaped movable shaft 9a.
Even if the movable core S has the AA, the movable space S of the movable iron core 9 is occupied, so that, similarly to the fourth embodiment, a worker working in the surrounding does not become in a dangerous state, and the movable space S is occupied. It is possible to do without removing the work.

In the first and second embodiments, the locking means EE is provided with a return spring 18 for urging the movable space S so as to release the occupied space when the locking with the housing DD is released. However, for example, when the work for removing the occupation of the movable space S may be performed, the return spring 18 may not be provided, and in that case, the number of parts can be reduced. In the first and second embodiments, the locking means EE is the movable iron core 9, more specifically, the movable shaft.
It is configured to contact the movable iron core 9 by moving in the same direction as the contact opening / closing direction so as to occupy the movable space S of 9a, but for example, the fixed contact 2a and the movable contact 3a may be slightly welded. If there is no such contact, the structure does not have to abut, and in that case, the degree of freedom in design can be increased.

In the first and second embodiments, the locking means EE and the movable iron core 9, more specifically, the movable shaft 9a, are rod-shaped having the same axial center and the axial direction being the same as the contact opening / closing direction. Although they are formed respectively, for example, when the slight welding between the fixed contact 2a and the movable contact 3a can be sufficiently separated, it is not necessary to form each in such a rod shape, and in that case, the dimensional accuracy may be reduced. it can.

Further, in the first and second embodiments, the regulating means 19 for regulating the moving amount when the locking means EE moves in the direction to remove the occupation of the movable space S is provided. When moving in the direction, if there is no excessive movement and disengagement from the housing, the regulation means 19 may not be provided, and in that case, the production becomes easier.

Further, in the third and fourth embodiments, the regulating means 19 for regulating the moving amount when the locking means EE moves in the direction of removing the occupation of the movable space S is also provided. When moving in the direction, if there is no excessive movement and protruding abnormally from the housing,
The regulation means 19 may not be provided, and in that case, the production becomes easier.

In the first to third embodiments and the fifth embodiment, the locking means EE occupies the movable iron core 9, more specifically, the movable space S of the movable shaft 9a, and maintains the off state. Although, for example, the connecting member that is the interlocking portion 11
Even if it is configured to occupy the moving space S of the CC and keep it in the off state, workers working around it do not become dangerous.

Further, in the fifth embodiment, two contact portions AA are provided, but only one contact portion AA is provided on the axial extension line of the rod-shaped movable shaft 9a. However, similar to the fourth embodiment, when the moving space S of the connecting member CC which is the interlocking portion 11 is occupied and the off state is maintained, the same effect can be obtained.

In the second embodiment, the case 12 has a groove.
12n, the body 13 is provided with a groove 13h respectively, but, for example, when it is not necessary to particularly confirm the feeling of positioning or the feeling of being locked, neither of them may be provided. Sometimes it's easier to make.

[0076]

According to the first aspect of the present invention, the locking means for moving and locking the movable part or the interlocking part interlocking with the movable part in the housing so as to occupy the movable space in which the movable part moves is locked by the locking part. Even if the movable part of the drive member operates when it is not operating, it does not suddenly project to the outside of the housing due to the operation of the movable part. The person working at is not in a dangerous state.

According to a second aspect of the present invention, in addition to the effect of the first aspect, the locking means released from the locking with the housing is urged by the urging means so as to remove the occupation of the movable space. Therefore, it is not necessary to remove the occupation of the movable space.

According to a third aspect of the present invention, in addition to the effect of the first aspect, the locking means is moved in the contact opening / closing direction so as to occupy the movable space of the movable portion or the interlocking portion interlocking with the movable portion. By contacting the movable portion, the fixed contact and the movable contact, which are slightly welded, can be separated from each other.

According to the fourth aspect of the present invention, the kinetic energy of the locking means in the moving direction is concentrated from the locking means to the movable part at one point, that is, the axis center, by the locking means coming into contact with the movable part. As a result, the fine welding between the fixed contact and the movable contact can be more reliably separated than in the third aspect.

According to a fifth aspect of the invention, in addition to the effect of the first aspect, the movement amount of the locking means in the direction of removing the occupation of the movable space is regulated by the regulation means, so that direction When it moves to, it will not move more than necessary and come off from the housing.

According to the sixth aspect, in addition to the effect of the fifth aspect, since the regulating means is provided in the housing, it is not necessary to provide the regulating means as a separate member.

According to a seventh aspect of the present invention, the rod-shaped movable portion has only one contact portion on the extension line in the axial direction, and the locking means moves from the axial direction of the movable portion in the contact opening direction. Therefore, even if the movable space of the movable portion cannot be occupied, the movable space of the movable portion or the interlocking portion interlocking with the movable portion is occupied by moving in the direction orthogonal to the contact opening / closing direction. It is possible to exert an effect.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a first embodiment of the present invention.

FIG. 2 is a vertical sectional view of the above.

FIG. 3 is a vertical cross-sectional view of the contact portion of the above.

FIG. 4 is a partial perspective view near one end of the above shaft.

FIG. 5 is a partial vertical cross-sectional view showing a state in which the above locking means occupies a movable space and then locks the housing.

FIG. 6 is an exploded perspective view of a second embodiment of the present invention.

FIG. 7 is a partial vertical cross-sectional view showing a state in which the overlapping hole of the body is overlapped with the through hole of the same case.

FIG. 8 is a partial plan view near the through hole of the above case.

FIG. 9 is a partial vertical cross-sectional view showing a state in which the above locking means occupies a movable space and then locks the housing.

FIG. 10 is a partial vertical cross-sectional view showing a state in which the locking means of the third embodiment of the present invention occupies the movable space.

FIG. 11 is a partial plan sectional view showing a state in which the above locking means occupies a movable space.

FIG. 12 is a vertical sectional view of a fourth embodiment of the present invention.

FIG. 13 is a partial plan sectional view showing a state in which the above locking means occupies a movable space.

FIG. 14 is a perspective view of a locking unit and a connecting member according to a fifth embodiment of the present invention.

FIG. 15 is a partial perspective view near the slide piece of the above.

FIG. 16 is a partial vertical cross-sectional view showing a state in which the above locking means occupies a movable space.

FIG. 17 is a partial plan sectional view showing a state in which the above locking means occupies a movable space.

FIG. 18 is a vertical sectional view of a conventional example.

FIG. 19 is a partial perspective view showing a state in which the locking means is locked to the housing.

[Explanation of symbols]

 AA Contact part 2a Fixed contact 3 Movable contact 3a Movable contact 4 Movable shaft BB Electromagnet device (driving member) 11 Interlocking part DD housing 9 Movable iron core (movable part) EE Locking means 18 Return spring (biasing means) 19 Regulation Means S movable space

Claims (7)

[Claims] 1. A contact portion having a fixed contact and a movable contact that comes in contact with and separated from the fixed contact, and one end of a movable shaft connected to a movable contact having the movable contact is driven to open and close the contact portion. A contact opening / closing device including: a drive member having a movable portion that moves in such a manner; a housing that houses the contact portion and the drive member; The locking means is movably provided such that the movable portion or the interlocking portion interlocking with the movable portion occupies a movable space in which the movable portion moves within the housing and maintains an off state. Contact switchgear. 2. The urging means is provided with urging means for urging so as to release the occupation of the movable space when the engagement with the housing is released.
The contact switching device described. 3. The locking means contacts the movable portion by moving in the same direction as the contact opening / closing direction so as to occupy the movable space of the movable portion or the interlocking portion interlocking with the movable portion. The contact opening / closing device according to claim 1, wherein 4. The contact opening / closing according to claim 3, wherein the locking means and the movable portion are each formed in a rod shape having the same axis center and an axial direction being the same direction as the contact opening / closing direction. apparatus. 5. The contact opening / closing device according to claim 1, further comprising: a restricting unit that restricts a movement amount of the locking unit when the locking unit moves in a direction to remove the occupation of the movable space. 6. The contact opening / closing device according to claim 5, wherein the regulating means is provided in the housing. 7. The locking means is movably provided in a direction orthogonal to a contact opening / closing direction.
The contact switching device described.