JPH0132334Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to a transformer, in particular an input circuit connected to a primary coil via a fuse, and
This relates to a transformer in which components including connection terminals and the like with an output circuit taken out from the next coil are provided on one terminal board.

Technical background of the invention and its problems Conventional transformers (including those for instruments) with a rated voltage of 500 VAC and a capacity of about 15 VA to 500 VA are generally constructed as shown in Figure 1. As shown in the figure, the transformer 1 includes plate-shaped frames 2 and 3 that stand up and face each other, and an iron core 4 is held between them. frame 2,
3, the upper end and the lower end are folded outward approximately 90 degrees, and the mounting arms 2a, 3a are attached to the upper end.
Attachment legs 2b and 3b are formed at the lower end. The iron core 4 is formed into a three-legged iron core by laminating magnetic plates formed in the shape of a Japanese character, and a coil 5 is wound around the central leg portion (not shown) of the three-legged iron core. 6
is a terminal board formed of an insulating plate, and screws 7 and 8 are mounted on the mounting arms 2a and 3a of the frames 2 and 3.
It is installed by. Primary side and secondary side terminal screws 9 and 10 are attached to both ends of the terminal board 6, and the lead wire 1 of the primary side coil of the coil 5 is attached.
The lead wires 12 of the first and secondary coils are separated and led out to both sides of the terminal board 6, and are fastened to the terminal screws 9 and 10 with tightening nuts 14 via connection terminals 13 crimped to the tips of the respective terminals. has been done.

Also, although not shown, each external wire on the power supply side or load side has a terminal screw 9 or 10.
It is configured to be connected to the upper side of the tightening nut 14.

By the way, in the case of the transformer configured as described above, the terminals and other components of the input circuit connected to the primary coil via the fuse and the output circuit taken out from the secondary coil are If they are arranged neatly on one terminal board, the size of the terminal board will be extremely large compared to the size of the transformer itself, so it is not practical, and in reality, they are installed on a fuse board installed separately from the transformer. Connect to the primary coil of the transformer through a fuse provided, or install a fuse on the transformer side.
Attach terminal screws and fuses for connecting external wires on the power supply side to the terminal board provided at the upper end of the transformer, and provide an input circuit to the primary coil via these.
In addition, a configuration in which a terminal screw for connecting an external electric wire on the load side of the output circuit of the secondary coil is provided at a position separate from the transformer is generally implemented.

However, in either case, the input circuit to the primary coil via the fuse and the output circuit from the secondary coil are separated, making maintenance and inspection inconvenient. There was a drawback that the connection of external electric wires and the insertion and removal of fuses could not be performed on the same plane and from the same direction.

Purpose of the invention The present invention was created in view of the above-mentioned problems and to effectively solve them.

Therefore, it is an object of the present invention to connect the respective components of the input circuit connected to the primary coil via a fuse and the output circuit taken out from the secondary coil into one miniaturized terminal. To provide a transformer that can be arranged in an orderly manner on a panel to facilitate maintenance and inspection and connection of external electric wires.

Summary of the invention The invention provides a unit compartment divided into at least the number of connection terminals of the primary coil and secondary coil by a partition wall extending in the front-rear direction at the front end of the terminal board. and in each unit compartment, one end is fixed to the terminal board by a first terminal screw, and the other end is bent and penetrates below the terminal board to connect to the lead wire of the coil. A terminal conductor forming a connection piece is attached, and a power supply side terminal conductor is provided at the rear end of the back side of the terminal board, one end of which is fixed to the terminal board by a second terminal screw,
A fuse clip electrically connected to the terminal conductor to which the lead wire of the next coil is connected and the power supply side terminal conductor is provided, and the fuse is inserted by passing between these fuse clips. By wearing this, the above purpose is achieved.

Embodiment of the invention A preferred embodiment of the invention will be described below with reference to the accompanying drawings.

2 to 5 show a front view, a plan view, a side view, and a wiring diagram, respectively, showing an embodiment of the transformer according to the present invention.

As shown in the figure, the transformer 21 is provided with plate-shaped frames 22 and 23 that face each other and stand upright, and an iron core 24 is held between them. The frames 22 and 23 each have an upper end portion and a lower end portion folded outward approximately 90 degrees, and a mounting arm 22 is attached to the upper end portion.
a, 23a, and the lower end has mounting legs 22b, 23b.
is formed. The iron core 24 is configured into a tripod iron core by laminating magnetic plates formed in the shape of a Japanese character, and a primary coil 25 and a secondary coil 26 are attached to the central leg (not shown). is wrapped. Mounting arms 22a, 23 of frames 22, 23
A terminal board 27 made of a molded insulator is attached to both ends of b by screws 28 and 29, and connection pieces for the primary coil lead wires 25a and 25b are attached to the front end of the terminal board 27 on the front side. 30 and a terminal screw 31 for connection to the fuse.
A terminal conductor 32' is attached which includes connection pieces 30' of the terminals a and 26b and terminal screws 31' for connecting the secondary external electric wire.

On the other hand, at the rear end of the terminal board 27 on the back side, one end is a terminal screw 33 for connecting an external electric wire on the power supply side.
A power supply side terminal conductor 35 is fixed on the power supply side 7 and has the other end connected to a power supply side fuse clip 34.

At a position spaced apart from the fuse clip 34 on the power supply side toward the front side of the terminal board 27 by a predetermined distance (an interval corresponding to the length of the fuse to be inserted),
A fuse clip 34' on the coil side is provided,
Coil side fuse clip 34' and terminal conductor 3
The two terminal screws 31 are connected to each other by a conductive plate 36, and a fuse 37 is inserted between the power supply side fuse clip 34 and the coil side fuse clip 34'.

6 to 9 show a plan view, a front view, a rear view, and a side view of the molded insulator of the terminal board 27, respectively.

As shown, the terminal board 27 has both outer walls 3
Attach the terminal board 27 to each of the arms 22 and 8, 39.
mounting flange 40 for fixing to a, 23a;
41 is provided in a protruding manner, and mounting holes 42 and 43 passing therethrough are provided respectively. Screw 2 mentioned above
8, 29 are inserted into the mounting holes 42, 43 and attached to the mounting arms 22a, 23a. At the front end of the base plate 44 of the terminal board 27, both outer walls 38, 3 are provided.
A plurality of unit compartments 46, 46' are formed between the compartments 9. In the illustrated example, this unit compartment 46,
46' is formed with 5 rooms in total, 3 rooms in the center 4
6' is provided with a common rear wall 47.
Each unit compartment 46, 46' is open at the front, and both outer unit compartments 46 are also open at the rear. A partition wall 45 that partitions these unit compartments 46, 46' extends forward from a rear wall 47. In addition, in the unit compartments 46, 46',
A terminal shelf 48 is provided which is formed in a stepped shape (step-like shape) that descends from the rear side to the front side.
The stepped terminal shelf 48 is formed by an upper horizontal terminal shelf 48a and a lower horizontal terminal shelf 48b, and a vertical insulating wall 48c extending downward from the middle is provided on the lower surface of the lower horizontal terminal shelf 48b. .

FIG. 10 shows a terminal conductor 32 formed in a similar stepped shape along a stepped terminal shelf 48,
32', and as shown in FIG. 9, the upper horizontal terminal conductive part 32a is engaged with the upper horizontal terminal shelf 48a, and the lower horizontal terminal conductive part 32b is engaged with the lower horizontal terminal shelf 48b, so that it is attached to the terminal shelf 48. Ru. Also,
Terminal screws 31 and 3 are installed in the upper horizontal terminal conductive part 32a.
1' is provided with a through hole 49 whose end is bent downward to provide an engaging piece 50 for engaging the terminal shelf 48, and the lower horizontal terminal conductive portion 32b is provided with an end bent downward at approximately 90 degrees. Connecting pieces 30, 30' for connecting the lead wires of the coils of the transformer are integrally provided.

The upper horizontal terminal shelf 48a of the stepped terminal shelf 48 is formed with a hexagonal fitting hole 51 for inserting a hexagonal nut for screwing the terminal screws 31, 31'. Continuously further downward there are holes for tightening the terminal screws 31, 31'. Further, a terminal conductor 3 is provided on the back side of the fitting hole 51.
Engagement holes 52 are provided for inserting engagement pieces 50 of 2 and 32'.

The lower horizontal terminal shelf 48b is provided with an insertion hole 53 through which the connecting pieces 30, 30' of the coil lead wire are inserted and guided below the lower horizontal terminal shelf 48b. Therefore, the terminal conductor 32 is inserted into the terminal conductor 32, 32' after the hexagonal nut is fitted into the fitting hole 51 formed in the upper horizontal terminal shelf 48a.
Connecting pieces 30, 30' of the coil lead wire on one end side
The terminal conductors 32, 32' are inserted into the terminals by passing through the insertion hole 53 of the lower horizontal terminal shelf 48b and fitting the engaging piece 50 on the other end side into the engaging hole 52 of the upper horizontal terminal shelf 48a. It is mounted on the shelf 48, and the terminal screws 31, 31' are inserted through the through holes 49 and screwed onto the nuts.

FIG. 11 is a perspective view of components mounted on a terminal board of an input circuit connected to a primary coil via a fuse. As shown in the figure, the plate-shaped power supply side terminal conductor 35 has a screw hole 54 into which the terminal screw 33 for connecting the power supply side external electric wire is screwed, and a mounting through hole for attaching the power supply side fuse clip 34 thereto. 55. Power supply side terminal conductor 3
5 is fitted into a recessed groove 56 formed on the base plate 44 from the back side to the front side of the terminal board 27, as shown in FIGS. 6, 8, and 9.
The tip of the terminal screw 33 screwed into the screw hole 54 and extending downward from the power supply side terminal conductor 35 is inserted into a tightening movement hole 57 formed on the base plate 44 corresponding to the position of the screw hole 54. stored inside. Further, a through hole 60 is formed in the lower end surface of the power supply side fuse clip 34, and a through hole 58 is formed on the base plate 44 corresponding to the position of the mounting through hole 55 of the power supply side terminal conductor 35. It is formed. The power supply side fuse clip 34 is attached to the base plate 44 with the power supply side terminal conductor 35 by the tightening screw 59 passing through the through hole 60, the mounting through hole 55, and the through hole 58 and using the nut member 61 from the back side of the base plate 44. is integrally fastened to.

A coil-side fuse clip 34' is provided at a position separated from the power supply-side fuse clip 34 toward the front by a distance corresponding to the length of the fuse. The coil side fuse clip 34' is placed on one end of the conductive plate 36, and includes a through hole 63 in the coil side fuse clip 34', a mounting through hole 64 in the conductive plate 36, and a through hole 65 formed in the base plate 44. A tightening screw 62 inserted through the base plate 44 is screwed into the nut member 66 from the back side of the base plate 44, and the conductive plate 36 and the coil-side fuse clip 34' are integrally fastened to the base plate 44. One end of the conductive plate 36 is connected to the coil-side fuse clip 34 as described above, and the other end is connected to the terminal installed in the unit compartment 46 (on both outside sides) at the front end of the terminal board 27. It is connected to the upper horizontal terminal conductive portion 32a of the conductor 32 by a terminal screw 31.

Fuse clip 3 on power supply side and load side
4 and 34' are provided with anti-rotation ribs 67, which surround the three directions of the lower end portions and prevent rotation.
67' is provided in a protruding manner on the base plate 44 of the terminal board 27.

Effects of the invention As is clear from the above explanation, the invention provides the following excellent effects.

That is, at the front end of the terminal board, a partition wall extending in the front-rear direction forms unit compartments divided by at least the number of connection terminals of the primary coil and secondary coil, and One end is fixed to the terminal board by a first terminal screw in the unit compartment, and the other end is bent to form a connecting piece that penetrates below the terminal board and connects to the lead wire of the coil. A terminal conductor is attached, and a power supply side terminal conductor is provided at the rear end of the back side of the terminal board, one end of which is fixed to the terminal board by a second terminal screw,
A fuse clip electrically connected to the terminal conductor and the power supply side terminal conductor to which the lead wire of the next coil is connected is provided, and the fuse is inserted by passing between the respective fuse clips. Now that the input circuit components and output circuit components are neatly mounted on one terminal board, the terminal board has become smaller, and the power supply side and load side can be connected from one direction above the same terminal board. Wiring, maintenance and inspection, etc. can be easily performed as it is possible to connect or disconnect electric wires, as well as insert and remove fuses.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a conventional transformer, Fig. 2 is a front view showing an embodiment of the transformer according to the present invention, Fig. 3 is a plan view of Fig. 2, and Fig. 4 is a side view of Fig. 2. 5 is a wiring diagram showing one embodiment of the wiring state of the transformer according to the present invention, FIG. 6 is a plan view showing one embodiment of the terminal board of the transformer according to the present invention, and FIG. 8 is a rear view of FIG. 6, FIG. 9 is a side view of FIG. 6, FIG. 10 is a perspective view of the terminal conductor of the transformer according to the present invention, and FIG. 11 is the present invention. FIG. 2 is a perspective view showing an embodiment of components around a fuse clip. In addition, in the figure, 22 and 23 are frames, 22a and 2
3a is a mounting arm, 24 is an iron core, 25 is a primary coil, 25a and 25b are lead wires of the primary coil,
26 is the secondary coil, 26a and 26b are the lead wires of the secondary coil, 27 is the terminal board, 30 and 30' are the connection pieces, and 31 and 31' are the terminal screws shown in the first example.
terminal screws, 32 and 32' are terminal conductors, 33 is the second terminal screw illustrated as a terminal screw, 34 is a fuse clip on the power supply side, 34' is a fuse clip on the coil side, and 35 is a terminal conductor on the power supply side. , 36 is a conductive plate, 37 is a fuse, 45 is a partition wall, 46,
46' is a unit compartment, and 67 and 67' are anti-rotation ribs.

Claims (1)

[Claims for Utility Model Registration] (1) A terminal board made of a molded insulator, and a pair of mounting arms at the upper end to which the terminal board is attached, facing each other and standing up to hold an iron core between them. In a transformer comprising a frame and a coil wound around the iron core, at least a primary coil and a secondary coil are provided at the front end of the terminal board at the front end thereof, by a partition wall extending in the front-rear direction. forming unit compartments divided by the number of connection terminals, and in each of the unit compartments, one end is connected to the first
A terminal conductor is fixed to the terminal board by a terminal screw, and the other end thereof is bent to form a connecting piece for penetrating below the terminal board and connecting to the lead wire of the coil; A power supply side terminal conductor whose one end is fixed to the terminal board by a second terminal screw is provided at the rear end on the back side of the terminal board, and the terminal to which the lead wire of the primary coil is connected. A transformer characterized in that a fuse clip electrically connected to each of the conductor and the power supply side terminal conductor is provided, and a fuse is inserted by extending between each of the fuse clips. . (2) The fuse clip is located between the fuse clip and the terminal conductor to which the lead wire of the primary coil is connected, with the distance between them being set according to the length of the fuse, or The transformer according to claim 1, wherein the electrical connection is made by connecting at least one of the power supply side terminal conductor and the fuse clip with a conductive plate. . (3) The transformer according to claim 1 or 2, wherein the fuse clip is surrounded by a rotation prevention rib that integrally protrudes from the terminal board at its lower end periphery. .