JPH0454699Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a screw-up holding structure for a terminal block that is connected using crimp terminals for the purpose of making electrical connections in various devices.

[Conventional technology] Conventionally, terminal blocks using this type of crimp terminal were
Most of them are installed on a standard general-purpose rail, and when connecting the crimp terminal to the terminal board, the mounting screw is lifted from the terminal board to maintain a gap for insertion so that the crimp terminal can be inserted. A new method has been devised. For example, as described in Japanese Utility Model Application Publication No. 60-87479, a guide/support piece provided near the lower partition wall of an insulating housing and a protrusion provided on a straight inner piece of a washer incorporated in a mounting screw are elastically interfered with each other. , there are some that perform screw-up retention. or,
As another example, as in Japanese Utility Model Application Publication No. 61-28269, a coil spring is provided in the center under the terminal plate, and the protrusion of the convex part on the vertical part of the terminal washer interferes with this coil spring, similar to the previous model. There is a screw-up retention method.

[Problem to be solved by the invention] However, the above conventional terminal block
In this case, the upper stop of the mounting screw uses a horizontal piece recessed under the terminal board as a stopper. In order to fit the notch of the terminal board and the vertical inner piece of the washer and to assemble it so that it can move up and down, two types of washers are required, one on the right and one on the left, each having a symmetrical shape. . However, since the washer and the mounting screw are integrated, two types of mounting screws with washers are required, and it is also necessary to use the left and right properly during assembly and to manage parts.

Furthermore, since the directionality of fitting occurs between the terminal board and the mounting screw, and between the terminal board and the insulating housing,
This has become a problem that leads to higher costs in terms of assembly work and production management.

In addition, in Japanese Utility Model Application Publication No. 61-28269, the shape of the washer and terminal plate is the same as that in Japanese Utility Model Application Publication No. 60-87479, and another design uses the same washer on the left and right sides. Two methods are described, but in both cases, the screw-up retention of this invention is achieved by interference between a spring installed under the terminal plate and a convex protrusion provided on the vertical part of the terminal washer. As the number of parts increases, assembly becomes more difficult, which also causes higher costs.

The latter idea of Utility Model Application Publication No. 61-28269 (Figure 4)
Although the washers are the same on the left and right, the locking part at the lower vertical end is wide, making it difficult to insert into the guide hole of the terminal board and having to be rotated 90 degrees to fit, resulting in poor assembly efficiency. There are also other problems. In addition, in all of these conventional examples, the main part for holding the screw up is located under the terminal plate, so the washer becomes long. Furthermore, the height of the lower part of the insulating housing also increases, which leads to higher costs.

However, the screw-up retaining structure of the present invention is
It is an object of the present invention to provide a screw-up type crimp terminal block which solves the above problems, has a minimum number of parts, is easy to assemble, and is low cost.

[Means for solving the problem] In order to achieve the above object, the screw-up holding structure of the present invention includes an insulating housing 1, a terminal plate 31 horizontally provided on the insulating housing 1, a pair of washers 37,
In the terminal block screw-up holding structure consisting of mounting screws 41, 41 with 38, the terminal board 31 has a pair of screw holes 32, 33 and a guide hole 3 symmetrically on the central axis.
4, 35 are opened, and the mounting screws 41, 41 with washers 37, 38 are made by integrating the lock washers, horizontal terminal pieces 39, 39, and straight inner pieces 40, 40, and can freely slide up and down. The terminal board 31 is inserted into the terminal board 31 and the mounting screws 41, 41 are screwed into the screw holes 32, 33 of the terminal board 31.
Guide and support pieces 18 and 19 for guiding the vertical movement of the mounting screws 41 and 41 and upper stopper pieces 26 and 27 for preventing them from coming off are provided near the upper partition wall 6,
The protrusions 42, 42 provided on the upper parts of the straight inner pieces 40, 40 of the washers 37, 38 and the guide/support pieces 18, 19
To provide a screw-up holding structure for a terminal block, characterized in that mounting screws 41, 41 are held upward by elastic interference with the screws.

[Function] In the terminal block of the present invention, in the washers 37 and 38, the horizontal terminal piece 39 and the straight inner piece 40 are shaped symmetrically with respect to the central axis A, and the outer surface of the straight inner piece 40 is closer to the horizontal terminal piece 39. Since they are of the same shape and have protrusions 42 on them, one type will suffice.

The washers 37 and 38 are symmetrical with respect to the central axis A, and the terminal plate 31 has a pair of screw holes 3.
2, 33 and guide holes 34, 35 are provided symmetrically on the central axis A of the terminal plate 31, so that the washer 37,
There is no directionality in assembling 38 and terminal board 31. Furthermore, the assembly of the insulating housing 1 and the terminal plate 31 with the washers 37 and 38 attached has no directionality. Furthermore, the guide/support piece and the stopper piece of the insulating housing are arranged at the upper part to shorten the washer length and reduce the lower dimension of the insulating housing.

[Examples] Hereinafter, the present invention will be explained with examples based on the drawings.

In the figure, 1 is an insulating housing, 2 is a bottom wall, 3 is a base wall provided on the back side of the bottom wall, 4 and 5 are side walls provided on both sides of the lower part of the base wall, and 6 and 7 are at the center of the base wall 3. An upper partition wall and a lower partition wall are provided above and below, 8 is a holding groove formed between the upper partition wall 6 and the lower partition wall 7, 9 and 10 are support grooves provided at the upper ends of the side walls 4 and 5, and 11a, 11b, and 12 are A connecting boss, 13 is a connecting bolt insertion hole, 14 and 15 are rail insertion grooves, and 16 and 17 are rail locking claws. Although not shown, recesses into which the connecting bosses fit are formed on the back surface of the base wall 3 corresponding to the connecting bosses 11a, 11b, and 12. Reference numerals 18 and 19 are guide and support pieces that guide the vertical movement of the washer and lock it.The lower part thereof is an inclined surface 20, 21 that is inclined toward the center of the insulating housing 1, and the side surface is used as a guide. The surfaces 22 and 23 have locking recesses 24 and 25 at the top.
is formed.

Further, reference numerals 26 and 27 are stopper pieces protruding from both sides of the upper partition wall 6. 28 and 29 are the base wall 3
These are the guide protrusions of the washer provided on both sides of the upper part of the washer, and the guide surfaces 22 and 23 of the guide and support pieces 18 and 19
The distance between the horizontal terminal pieces 39 of the washers 37 and 38 is slightly larger than the width between the outer end of the horizontal terminal piece 39 and the outer surface of the straight inner piece 40 when viewed from the front.

31 is a rectangular terminal plate, which has a pair of screw holes 32, 33 and a guide hole 3 symmetrically on its central axis A.
4,35. This terminal plate 31 is horizontally attached to the insulating housing 1 with the center inserted into the holding groove 8 and both ends supported by the support grooves 9 and 10.

Further, 37 and 38 are washers, which are provided with a horizontal terminal piece 39 and a straight inner piece 40 that are symmetrical with respect to the central axis A, and a mounting screw 41 is inserted and attached to the horizontal terminal piece 39. protrusion 4 on the outer surface of
2 is provided. The mounting screw 41 is the horizontal terminal piece 39
It is inserted into a screw insertion hole 43 opened in , and a locking wedge 44 is fitted under the neck, and a caulking part 44a is formed at the lower part of the screw with the horizontal terminal piece 39 in between, so that it can be rotated with respect to the horizontal terminal piece 39 without being able to escape. only possible. These washers 37 and 38 are connected to the guide holes 3 of the terminal plate 31 with their straight inner pieces 40 and 40
4, 35 and attach the mounting screws 41, 41 to the terminal board 3.
1 into the screw holes 32 and 33.

The terminal block of the present invention is used by integrating the necessary number of terminal blocks via a rail. In other words, insertion groove 1
4 and 15, lock them with the locking claws 16 and 17, install the required number of terminal blocks on the rail, cover the openings on the end faces, and place both ends of these series of terminal blocks on the rail. It is fixed and integrated with a locking metal fitting. In some cases, a plurality of terminal blocks may be integrated by inserting bolts into the bolt insertion holes 13 for connecting each terminal block without using a rail.

Also, when assembling, the guide hole 3 of the terminal board 31
4, 35, the direct inner piece 40, 4 of the washer 37, 38
0 into the screw hole 3 and the mounting screws 41, 41 into the screw hole 3.
2 and 33, a pair of washers 3
Attach 7 and 38 to the terminal board back to back.
In this state, the terminal plate 31 is inserted into the holding groove 8 between the upper partition wall 6 and the lower partition wall 7 of the insulating housing 1 to horizontally fix the device.

In this terminal block, as shown in FIG. 2, the mounting screw 41 screwed into the screw hole 32 of the terminal plate 31 is loosened, and the washer 37 is lifted upward with a tool such as a screwdriver. At this time, the straight inner piece 40 of the washer 37 is guided by the guide/support piece 18 or the guide hole 34 of the terminal plate 31, and the horizontal terminal piece 39 is guided by the guide protrusion 28. When the washer 37 is lifted up to a predetermined height, the protrusion 42 moves to the guide/support piece 1.
The washer 37 is supported at that position by climbing over the guide surface 22 from the inclined surface 20 of No. 8 and being locked in the locking recess 24 . At this time, since the guide/support piece 18 is made of resin and is provided to protrude from the base wall 3, it has appropriate elasticity and is temporarily elastically deformed during the process in which the protrusion 42 is locked in the locking recess 24. The locking of the washer 37 becomes possible. By lifting the washer 37, the terminal plate 31 and the washer 37
There will be a gap between the screw hole 3 of the terminal board 31
Place the crimp terminal 51 of the connection wire 50 on top of the washer 3.
The connection wire 50 is connected by disengaging the protrusion 42 of 7 from the guide/support piece 18, lowering the washer 37, and screwing the mounting screw 41 into the screw hole 32. The stopper 26 is a washer 37
A movable upper limit position is determined to prevent the washer 37 from coming out of the guide hole 34 of the terminal plate 31.

[Effects of the invention] As is clear from the above explanation, the screw-up retaining structure of the invention uses only one type of mounting screw with washer and can be assembled into the terminal board by simply inserting it from above, which requires no special steps. and directionless, easy and simplified. In addition, by arranging the guide/support piece and stopper piece of the insulating housing on the upper part, there is no need to provide a locking part to prevent upward removal at the lower end of the straight inner piece of the washer, and the washer length can be shortened accordingly. I can do it. Furthermore, in the case of insulating housings, the dimensions of the lower part can be reduced, and the former leads to more efficient assembly work, while the latter leads to lower costs for each component.This allows us to provide an overall low-cost screw-up terminal block. The effect of this idea is great.

[Brief description of the drawings]

Fig. 1 is an exploded perspective view of a terminal block according to an embodiment of the present invention, Fig. 2 is a front view thereof, Fig. 3 is a perspective view of a terminal board, Fig. 4 is a front view of a washer, and Fig. 5 is a washer. FIG. 6 is a partial front view of the insulating housing. 1... Insulating housing, 18, 19... Guide and support piece, 26, 27... Stopper piece, 31... Terminal plate, A... Center shaft, 32, 33... Screw hole, 3
4, 35... Guide hole, 37, 38... Washer, 39
...Horizontal terminal piece.

Claims (1)

[Scope of utility model registration request] In a terminal block screw-up holding structure consisting of an insulating housing 1, a terminal plate 31 provided horizontally on the insulating housing 1, and a pair of mounting screws 41, 41 with washers 37, 38, the terminal plate 31 has a terminal plate 31 arranged horizontally on the central axis. A pair of screw holes 32, 33 and guide holes 34, 35 are opened, and a mounting screw 41, with washers 37, 38,
41 is a lock wedge and a horizontal terminal piece 39,3
Washers 37, 3 consisting of 9 and straight inner pieces 40, 40
8 is integrated into the terminal plate 31 so as to be slidable up and down, and the mounting screws 41, 41 are screwed into the screw holes 32, 33 of the terminal plate 31. Mounting screw 4 with 37 and 38
A guide/support piece 18 that guides the vertical movement of 1 and 41;
19 and upper stopper piece 2 to prevent it from coming off
6, 27 are provided near the upper partition wall 6, and washers 37,
The terminal block is characterized in that the projections 42, 42 provided on the upper part of the straight inner pieces 40, 40 of 38 and the guide/support pieces 18, 19 elastically interfere with each other to hold the mounting screws 41, 41 upward. Screw-up retention structure.