JPS6322004B2 - - Google Patents

Description

[Detailed Description of the Invention] There are various types of conventional contactors that are compatible with switching modes such as simple circuit closing, breaking, circuit switching, and Y-Δ switching in three-phase alternating current. Contact is unified, and in order to obtain various switching modes, dedicated contactors must be prepared for each, and the cost burden is large.

The present invention has been made in view of the above-mentioned points, and includes a case body having a structure that can be assembled freely and commonly applied to various switching modes, a movable contact unit that can be detachably installed in the case body,
The present invention relates to a novel contactor configured in combination with contact bars of various shapes that are arbitrarily selected and installed on the case body in accordance with various switching modes.

An example of the embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. The polar chambers 2, 2', 2'' are shown in Figs. 1 and 5.
As shown in the figure, the center is provided with contact portions A and B divided into left and right by a partition wall 3, and these left and right contact portions A and B are each equipped with a movable contact unit U, and each electrode chamber 2, Contact bars 4, 5, and 6 are arranged at the upper and lower parts of the contact portions A and B of 2' and 2'', respectively, and these contact bars 4, 5, and 6 are formed by bending straight conductors to form fixed contact portions. The terminals 7 and 8 are formed integrally with a conductor section and can be attached to the case body S at will, and similarly, the connection terminals 7 and 8 are attached at will to the case body S and connected to the contact bars 4, 5, and 6. be done.

As shown in FIGS. 3 and 4, the movable contact unit U has a pair of side plates 9, 9' fixed integrally with the rectangular frame 10 at their upper ends, and a bottom wall at the lower end. A pusher 13 is slidably inserted into a guide cylinder 12 provided at the center of the frame 10, and the pair of side plates 9, 9' have a central height position on the inner surface thereof. U-shaped groove 14,1 in the horizontal direction
4', the two movable contacts 15, 15' are placed back to back to each other, and the holders 17 are positioned vertically at the center of the bottom wall 11 with a creepage distance, and on the left and right sides with the isolation upright pieces 16 in between. U-shaped groove 14,1 at 17'
4', and two leaf springs 18, 1
These leaf springs 18, 18' are pivotally mounted on the presser 13 at their upper ends as a pair at 8', and shaft rods 19, 20 are provided in the respective holders 17, 17' of the respective movable contacts 15, 15'. and 19', 20', and the lower end is attached to the side plate 9, at both sides of the upright piece 16.
9', and as the pressing element 13 presses, the two leaf springs 18, 18' are pressed and curved outwards, and the two movable contacts 15, 15' are opposed to each other. This movable contact unit U is inserted into the left and right contact portions A and B of the electrode chamber 1 from above, and the movable contact units U installed in the contact portions A and B are The unit U is equipped with movable contacts 15, 15' at the upper and lower ends of the movable contact bar 4, respectively.
The fixed contact portions 5 and 6 are pressed into contact with the plate springs 18 and 18'.

Electromagnets 21 and 21' are installed corresponding to the contact parts A and B on the lower surface of the case body S, and two connecting rods 22, 23 and 22', 2 are installed for each electromagnet 21 and 21'.
A shaft rod 3' is slidably inserted between two partition walls 1 and 1 which overlap each other back to back in the middle of the case body S, and the upper end is inserted into the presser 13 of the movable contact unit U. 24, 24', and the lower end is connected to the movable magnet core 25, of the electromagnet 21, 21'.
The movable contacts 15, 15' are brought into contact with the contact bars 4, 5, 6 by pressing and bending the plate springs 18, 18' by the operation of the electromagnets 21, 21'.

As shown in FIG. 6, the partition wall 1 forming the case body S has thin plate-shaped crosspiece frames 26, 26' integrally protruding from the upper left and right positions surrounding the four corners of the pole chamber 2 on its inner surface. , square shaft-shaped crosspiece frame 27 at the left and right positions of the lower part,
27' are integrally protruded, a thin plate-shaped crosspiece frame 28 is integrally protruded from the upper position of the center that divides the electrode chamber 2 into left and right halves, and a U-shaped crosspiece frame 29 is integrally protruded from the lower position. The upper and lower crosspiece frames 26 and 27 of each one of these
Protrusions 30, 31 are provided protrudingly on the tip surfaces of the upper and lower crosspiece frames 26', 27', and concave holes 32, 33 are bored in the tip surfaces of the other upper and lower crosspiece frames 26, 27'. frame 27,
cylindrical shafts 35, 3 having square shaft-shaped external shapes and circular through-holes 34, 34' at intermediate positions between cylindrical shafts 35 and 27';
A short cylindrical portion 36 is protruded from the distal end surface of one cylindrical shaft 35, and a stepped portion 37 is bored at the opening edge of the through hole 34' of the other cylindrical shaft 35'. A flange portion 3 forming a stepped portion surrounding the inner edge along the crosspiece frames 26, 26' at the left and right positions and the crosspiece frame 28 at the upper center position.
8, 38' are provided protrudingly, and the crosspiece frame 28 at the upper center is provided with a groove 39 surrounded by flanges 38, 38'.
A partition wall 3 is installed between this concave groove 39 and the concave-shaped crosspiece frame 29 at the lower center to divide the left and right sides of the electrode chamber 2 into two, providing contact portions A and B, and movable contact units U respectively. Lower left and right crosspiece frames 27, 2 are attached to the lower inner edge so that the frame 10 is locked and fitted to the flange portions 38, 38' when inserted into the contact portions A and B of the
7' and the lower central crosspiece frame 29, there are raised ridges 40, 4.
0' and two horizontally parallel ribs 41, 42, 41', 42' protruding from the center height position to connect the flanges 38, 38' and the ribs 41, 4.
concave part 43, 4 for the upper contact bar surrounded by 1';
3', and concave portions 44, 44' for the lower contact bar surrounded by protuberances 40, 40' and ribs 42, 42'. On the inner surface of each left and right side extending to , there are grooves 45, 46, 47 and 4 for connecting terminals at positions corresponding to concave surfaces 44, 44' for the upper and lower contact bars.
5', 46', 47', and a plurality of crosspiece frames 48, 48' which form a bottom surface at the lower edge are protruded to form the inner surface of the partition wall 1, and the back surface of the partition wall 1 has a polar chamber 2. U-shaped vertical grooves 49, 49' are bored at positions corresponding to the center parts of the left and right contact parts A and B, which are divided into two parts, and semi-cylindrical vertical grooves 50, 50' are bored in the left and right sides. At the same time, a short tube 51 is provided protrudingly in one of the through holes 34, and a circular step portion 52 is provided in the other through hole 34'. This partition wall 1 is made into a set of two pieces, and corresponding frame frames 26 and 2 are protruded from the inner surfaces of each other.
6', 27, 27' and cylinder shafts 35, 35' are butted against each other, and the protrusions 30, 31 and short cylinder parts 36 are fitted into the recesses 32, 33 and the step part 37 to form the electrode chamber 2. Similarly, two partition walls 1 are used as a set to form electrode chambers 2, 2', and these three sets are overlapped with the back surfaces of the partition walls 1 located inside each other to form a short section of one partition wall 1. The cylinder 51 is connected to the circular stepped portion 5 of the other partition wall 1.
A flat square hole is formed by the U-shaped vertical grooves 49, 49 of the partition wall 1 which are fitted into the partition walls 2 and overlap each other, and a semicircular vertical groove 5 is formed.
0,50 to form a circular hole, and the rod rod 53,
53' is inserted through the through-holes 34, 34' of each set to the partition wall 1 located on the outside of the other set, and screwed at both ends, thereby allowing the case body S to be freely assembled. 22 and 23 are inserted in continuous rods into the flat square holes formed by the U-shaped vertical grooves 49 and 49 between the partition walls 1 and 1 which overlap each other back to back, and are formed by semicircular vertical grooves 50 and 50. Insert the screw shaft 5 into the circular hole
4 is inserted and the electromagnet stand 21a is screwed and installed. In addition, as shown in FIG.
a is a U-shaped vertical groove 49, a semicircular vertical groove 50, and a short tube 5
1 becomes unnecessary, so it is preferable to prepare an end partition wall 1a with a flat back surface.

FIG. 7 shows contact bars of various shapes prepared to obtain various switching modes, and FIG. Shared in switching mode. b
The figure shows a contact bar 56 bent in a U-shape, with fixed contact pieces 56', 56'' attached to the inside of each bent part 57, 57', and this contact bar 56 is attached to one contact point of the pole chamber 2. It is installed in part A or B, but it is also used for single-throw type. Figure c shows a contact bar 5 formed in a U-shape.
Fixed contact pieces 58, 58' are attached to the insides of bent portions 59, 59', the other of which is slightly shorter at 8, and this contact bar 58 is attached to one contact portion A or B of the electrode chamber 2.
The bent portion 59' on the shorter side ensures creepage distances at different potentials, different circuits, and when turning on and off. Fig. d shows a contact bar 60 bent in a U-shape, with fixed contact pieces 60' and 60'' attached to the outside of one bent part 61 and the inside of the other bent part 61', respectively. The bent portions 61 and 61' are installed so that they are located on the connection terminal side of one contact portion A of the chamber 2 and on the central portion side of the other contact portion B, or vice versa.In other words, this contact bar Reference numeral 60 is used for a multi-dimensional circuit configuration, for example, a star-delta circuit.The figure e shows a U-shaped configuration with one bent part 62 on one side and two parallel bent parts 6 on the other side.
2', 62'', and a fixed contact piece 63 is provided on each inner side of one bent part 62 and the other parallel inner bent part 62' and on the outside of the other parallel outer bent part 62'', respectively. ', 63'', 63 are attached, and this contact bar 63 has two parallel bending parts 62', 62'' sandwiching the partition wall 3 that divides the electrode chamber 2 into two, and one bending part 62 is connected to the pole. It is arranged so as to be located on the connection terminal side of each contact portion A or B of the chamber 2. That is, this contact bar 63
is Y-Δ or AC: 2 contacts when switching DC, series H,
This is the basic form of R, C contact. FIG. Fixed contacts 66', 66'' are attached to the inside of the bar 66, and this contact bar 66 has two parallel bent portions 65, 6 in the center.
5′ is located across the partition wall 3 that bisects the polar chamber 2,
In addition, the bent portions 64 and 64' at both ends are connected to the contact portions A and B.
The contact bar 66 is located on the side of each connection terminal of the switch, and this contact bar 66 is mainly on the load side during power supply and three-way switching in the basic mode of switching. In figure g, fixed contact pieces 67', 67'', and 67 are attached to three positions of a contact bar 67 formed in a straight line. ',2''. Figure h is the same as above b.
A contact bar 56h is obtained by modifying the contact bar 56 shown in the figure.I is a contact bar 63i which is a modification of the contact bar 63 shown in FIG. Yes, contact bars 56h, 63i and 66 in these h, i, j diagrams
J is formed into an annular body by bending it into an endless shape, and when the constant amount of current flowing is increased by 1 to 5 times or more, the heat dissipation efficiency is improved by a commensurate amount, especially when using two contacts. When connected in parallel, it is possible to eliminate the tendency for the arc to flow unevenly during interruption. FIG. 8 shows a short connection terminal 68 and a long connection terminal 69, and these various contact bars 55, 5.
6, 58, 60, 63, 66, and 67 are arbitrarily selected corresponding to various switching modes, and installed on the upper surface portions 43, 43' or the lower concave surface portions 44, 44' of the partition wall 1. 69 on the extended side of the partition wall 1.
47' and assemble the two partition walls 1 and 1 as a set. However, in the case of a single-throw type, two sets of two units may be installed.

Next, an example of use of the contactor configured as described above will be explained with reference to FIG. 9 and subsequent figures. However, although the case body S assembled by the bulkhead 1 is not shown in the drawing, the various contact bars, movable contacts, and connection terminals are assembled in the case body S at arbitrary positions formed by the bulkhead 1. Shown as a diagram.

Figures 9a and b are contactors for double-throw AC/DC switching applied to emergency power switching, etc. Figure 9a shows the circuit diagram, , , are DC power terminals, and No. When .1 is turned on, connection terminals U, V, W
are connected to the connection terminals R, S, T, and when No. 2 is turned on, the DC power supply terminal, , is connected to the connection terminals R, S, T. FIG. 9b is a perspective view showing the assembly position of the main parts of the contactor that achieves such a switching mode, and shows the assembly positions of the main parts of the contactor that achieves such a switching mode, and shows the assembly positions of the main parts of the contactor that achieves such a switching mode.
For each movable contact piece 70, 71 of 2'', the contact bar 58 shown in FIG. A contact bar 5 shown in FIG.
8 is selected and installed in the concave surface 43 of the upper part of the other partition wall 1, and for the movable contact pieces 71', 72', and 73', the contact bar 63 shown in FIG. 1, the partition wall 3 is sandwiched between two parallel bent parts 62' and 62'', and a contact point shown in FIG. 7a is provided for the movable contact piece 70'. By selecting the bar 55 and placing it in a predetermined position, two series contacts are made on the DC side.The contact bar 55 and the contact bar 58 are provided with a DC power terminal, which is a short connection terminal shown in FIG. Connect terminals S and T, and connect terminals U, V, and W, which are long connection terminals 69 shown in FIG. 8, to the contact bar 63. By selectively attaching the contact bars in this way, A contactor in the switching mode shown in a is obtained.

Figures 10a and 10b are contactors for Y-Δ switching, and Figure 10a shows the circuit diagram.If you turn on No. 1, it becomes star connection mode, and if you turn on No. 2, it becomes delta connection mode. Goes into connection mode. FIG. 10b is a perspective view showing the main parts of a contactor that achieves such a switching mode, and for the movable contact pieces 70 and 72, the contact bar 60 shown in FIG. 7d is selected, while the contact bar 60 shown in FIG. Similarly, for the movable contact pieces 71 and 73, the contact bar 60 shown in FIG. For the movable contact piece 70', select the contact bar 67 shown in FIG. For the contact pieces 71', 72', and 73', select the contact bar 63 shown in FIG.
The connecting terminals Z, X, which are short connecting terminals 68 shown in FIG.
Connect Y to U, V, and W, and the contact bar 63 has the 8th
By connecting the connecting terminals R, S, and T, which are the long connecting terminals 69 shown in the figure, and selecting such contact bars, a Y-Δ contactor in the switching mode shown in FIG. 10a is obtained.

Figures 11a and 11b are double-throw contactors, and the first
Figure 1a shows the circuit diagram, and when R No. 1 is turned on, it is connected to connection terminals U, V, W and Z, X, Y, respectively, and connected corresponding to connection terminal R ₁ , and R No.
When 2 is turned on, connection terminals Z, X, Y and U,
They are connected to V and W, respectively, and connected to the connection terminal _R2 . FIG. 11b is a perspective view showing the main parts of the contactor that achieves such a switching mode, and the seventh
Selecting the contact bar 60 shown in Figure d, one side of the bulkhead 1
The movable contact piece 71,
73, the contact bar 6 also shown in FIG.
0 is selected and installed at 43' of the other partition wall 1, and for the movable contact pieces 70' and 71', the contact bar 56 shown in FIG. 44, and for the movable contact pieces 72' and 73', the contact bar 56 shown in FIG.
Each contact bar 60 has short connection terminals 68 Z, X, Y and U, V, W shown in FIG.
and R ₁ ×3 and R ₂ ×3, which are long connection terminals 69 shown in FIG. 8, are connected to the contact bar 56. By selectively mounting the contact bar like this, the first
A switched mode contactor as shown in Figure 1a is obtained.

Figures 12a and b show connection terminals R, S, T or power supply or load (three-way switching) connection terminals U ₁ ,
_The contact bars 58 _{and 66 shown} in FIG _. The contact bar 66 is installed in the upper concave surface part 43' of one partition wall 1 and the upper concave surface part 43' of the other partition wall 1, and the contact bar 66 is connected to the two central parallel bent parts 65, 6.
5' is sandwiched between the partition walls 3, and is installed on the entire lower concave portions 44, 43' of the other partition wall 1. The short connection terminals 68 shown in FIG. 8, U ₁ , V ₁ , W ₁ and U ₂ , V ₂ , W ₂ are connected to the contact bar 58, and the long connection terminals 68 shown in FIG. Connect terminals 69, R, S, and T. By selectively attaching the contact bars in this way, a contactor in the switching mode shown in FIG. 12a is obtained.

Figures 13a and 13b are contactors for turning on and off two different circuits and two different voltage circuits alternately or sequentially at the same time, and have connecting terminals R ₁ , S ₁ , T ₁ and U ₁ , V ₁ , W _{1 .}
are one set, and the connection terminals R ₂ , S ₂ , T ₂ and U ₂ ,
V ₂ and W ₂ form one set. Contact bars 58 shown in FIG. 7c are selected and installed in the upper concave surface 43' and the lower concave surface 44 of each of the partition walls 1 on the one side and the other side, respectively. and contact bar 5
8 is a short connection terminal 68 shown in FIG.
U ₁ , V ₁ , W ₁ and U ₂ , V ₂ , W ₂ are connected, and the contact bar 58 has long connection terminals 68 shown in FIG. 8, R ₁ , S ₁ , T ₁ and R ₂ , Connect S ₂ and T ₂ . By selectively attaching the contact bars in this manner, a switching mode contactor as shown in FIG. 13a is obtained.

The above-mentioned switching mode contactor has two contact parts A,
The contactors shown in FIGS. 14 and after are so-called single-throw type contactors having one contact point, whereas the contactors shown in FIGS.

Figures 14a and 14b are particularly suitable for use in DC high voltage circuit breakers, and have two contacts in series. FIG. 14a is a circuit diagram of the circuit, which opens and closes connection terminals R, S, and T and connection terminals U, V, and W. As shown in FIG. 14b, FIG. Contact bars 55 and 56 shown in b are selected.

Figures 15a and 15b show a contactor with two contact pieces arranged in parallel. FIG. 15a is the circuit diagram, and shows the left connection terminals R, S, and T, and the right connection terminals U,
The contact bar 56 shown in FIG. 7b is selected because it opens and closes V and W. In this contactor, since the terminal direction is vertical, a contact bar 56h shown in FIG. 7h can be used in place of the contact bar 56. When the contact bar 56h is used, the heat dissipation effect improves, so the power can be increased.

16a and b are the same switching modes as in FIGS. 15a and b, and the same contact bar 56 is selected, but the connection terminals R, S, T and the connection terminals U, V, The Ws are connected and installed in upper and lower positions. Since the terminal direction of this contactor is unidirectional, the power can be increased by using a contact bar 56h shown in FIG. 7h in place of the contact bar 56.

Figures 17a and 17b are switches for simultaneously opening and closing two different circuits, and the connection terminals R ₁ , S ₁ ,
T ₁ and U ₁ , V ₁ , W ₁ are one set, and the connection terminals R ₂ ,
S ₂ , T ₂ and U ₂ , V ₂ , W ₂ form one set, and the contact bar 55 shown in FIG. 7a is selected.

In addition, FIG. 18 shows the above-mentioned FIGS.
7 shows a partition wall 74 for assembling the case body S' used in the contactor shown in FIGS. 7a and 7b. This partition wall 74 is formed by upper left and right crosspiece frames 7 surrounding the four corners.
5, 75' and the lower left and right crosspiece frames 76, 76' are installed in a dimensional position where only one movable contact unit U shown in the third figure is installed, and an upper concave surface part 77 and a lower concave surface part 78 in which a contact bar is installed. A polar chamber is formed by assembling two partition walls 74 as a set.

Incidentally, in the various embodiments described above, contactors for switching lines, making and breaking three circuits, etc. were shown, but except for Y-Δ, 6 contactors
Of course, the number of lines may be further increased, or the number of lines may be reduced to three or less.

In this way, the movable contact unit can use a contact bar with fixed contact pieces attached to the side surface in order to horizontally move the movable contact pieces provided at the upper and lower ends of the movable contact by the elastic force of the leaf spring, and these contacts The bars are available in different shapes and can form a common case for contactors of different switching modes, so that contact bars can be provided for different switching modes. Further, by selecting a single-throw case and a double-throw case, the contact bar can be shared.

That is, according to the present invention described above, contact bars of various shapes for forming a plurality of switching modes are prepared, and a desired contact bar is selected from among these contact bars and installed in the contactor case. Since a common contactor case is provided for both single-throw and double-throw applications, the desired switching mode can be obtained for each, reducing overall costs and improving productivity. It has advantages such as being extremely effective.

[Brief explanation of the drawing]

The figures relate to the present invention, and FIG. 1 is a perspective view of a switch with main parts cut away in one embodiment, and FIG.
The figure is a side view, Figure 3 is a perspective view of the movable contact unit, Figure 4 is a vertical sectional view, Figure 5 is a sectional view of the contactor shown in Figure 1, and Figure 6 is an exploded view of the case body. 7a-j are perspective views showing various contact bars applied to the present invention; FIG. 8 is a perspective view showing connection terminals used in the present invention; FIGS. 9a and b - Figures 17a and 17b are circuit diagrams showing examples of various switching modes obtained by the present invention and a perspective view of the main parts thereof, and Figure 18 is an exploded perspective view of another single-throw case body. It is a diagram. S...Case body, U...Movable contact unit,
1... Partition wall, 2... Pole chamber, 15, 15'... Movable contact, 18, 18'... Leaf spring, 26, 26', 2
7, 27'... Crosspiece frame, 34, 34'... Through hole, 3
5, 35'...Cylinder shaft, 43, 43', 44, 44'
... Concave portion, 45, 45', 46, 46', 47,
47'... groove, 55, 56, 58, 60, 63,
66, 67...Contact bar, 55', 56', 56'',
58', 58'', 60', 60'', 63', 63'', 6
3,66',66'',66,66''''',67'
，
67″, 67……Fixed contact piece, 57, 57′, 5
9, 59', 61, 61', 62, 62', 62'',
64, 64', 65, 65'...bent portion.

Claims (1)

[Scope of Claims] 1. A cylindrical shaft with a through hole protruding between upper, lower, left and right cross frames surrounding the four corners of the electrode chamber, upper and lower concave surfaces for contact bars, and strips for terminals. Two partition walls formed with grooves are made into a set, and a case body is formed which can be assembled freely by abutting each other's frame frames and cylinder shafts and inserting rods into the through holes of the cylinder shafts, and then facing each other back to back. A leaf spring is provided on the back of each of the two movable contacts, and each leaf spring is pivotally fixed at the lower end, and pivoted to a pusher at the upper end, so that the leaf spring is bent by the pressing operation of the pusher, and each movable spring is fixed. A movable contact unit that allows the contacts to move in opposite directions can be freely attached to the case body, and a plurality of contact bars are integrally formed with a conductor part and a fixed contact part, each of which has a fixed contact part and two movable contacts. A contactor is configured such that it can be freely installed in the upper and lower concave portions of the partition wall of the case body, which are located correspondingly to the upper and lower ends of the case body. 2. The contactor according to claim 1, wherein the contact bar has a short piece shape with a fixed contact piece attached thereto. 3. The contactor according to claim 1, wherein the contact bar is bent into a U-shape and a fixed contact piece is attached to the inside of each bent portion. 4. The contact bar is U-shaped and has bent portions with the other side being slightly shorter, and a fixed contact piece is attached to the inside of each bent portion.
Contactor as described in section. 5. The contactor according to claim 1, wherein the contact bar is bent into a U-shape, and fixed contact pieces are attached to the inside of one bent portion and the outside of the other bent portion. 6. The contact bar has one bent part and two bent parts parallel to the other, and a fixed contact piece is attached to each inside of one bent part and the other bent part, and a fixed contact piece is attached to the inside of the other bent part. The contactor according to claim 1, further comprising a fixed contact piece attached to the outside of the bent portion. 7. The contact bar is bent into a U-shape and has bent portions at both ends and two parallel bent portions at the center, and a fixed contact piece is attached to the inside of each bent portion. The contactor according to the range 1 above. 8. The contactor according to claim 1, wherein the contact bar is formed in a straight line and has fixed contact pieces attached at three locations. 9. The contactor according to claims 3, 6 and 7, wherein the contact bar is formed into an endless ring.