JP3822274B2 - Terminal block - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a terminal block widely used in communication devices, electronic devices, and the like, and more particularly to a structure of a terminal block for fixing a terminal attached to a wiring for connection.
[0002]
[Prior art]
This type of terminal block is used for connecting a plurality of wirings to be connected in one place and connecting corresponding wirings, and various types of terminal blocks have been proposed. For example, sandwiched fixing screw screwed into the terminal plate constituting a terminal block a forked terminal attached to one end of the wiring to be connected, by tightening the fixing screw, for fixing the terminal block for wiring the wiring connection As shown in Japanese Utility Model Laid-Open No. 4-102568, for example, a round terminal is attached to one end of the wiring to be connected, and the screw hole position of the terminal plate is removed from the terminal plate. There is a structure in which the round terminal is fixed to the terminal block by screwing the fixing screw into the screw hole after the round terminal is arranged on the terminal block. The latter terminal block has a function to prevent the fixing screw from dropping from the mounting position when the fixing screw is removed from the terminal plate in order to attach the round terminal in consideration of workability. I have. That is, in the terminal block of this example, the wiring connection portion provided with the screw drop-off prevention mechanism is composed of a terminal block body made of a synthetic resin material which is an electrically insulating material, and a conductive material provided on the terminal block body. A terminal plate, a screw drop-off prevention fitting provided on the top of the screw hole formed in the terminal plate, and a fixing screw rotatably held on the top of the screw drop prevention fitting via a washer And a spring member such as a compression coil spring arranged so as to urge the screw drop prevention metal fitting upward. In this example, the screw drop-off prevention metal fitting has an upper end portion that is held up and down by the terminal base body and a lower end portion that faces a void formed below the terminal plate.
[0003]
And this screw drop prevention metal fitting is always urged | biased upward by the above-mentioned spring member arrange | positioned in the empty space, and is hold | maintained in the raising position in the state which does not fall a fixing screw. In this state, insert a round terminal, such as a round crimp terminal attached to the connection end of the wiring to be connected, between the screw part and the terminal plate, and then screw it into the screw hole of the fixing screw. The accompanying wiring is electrically connected to the terminal block by sandwiching and fixing the terminal between the terminal plate and the head of the fixing screw.
[0004]
Conversely, when the screw of the fixing screw is released, the screw drop-off prevention fitting moves upward due to the upward biasing by the spring member, and the screw drop-off prevention fitting moves upward to move the fixing screw head. The part rises away from the terminal plate, and as a result, the round terminal can be pulled out from the terminal block and removed.
[0005]
[Problems to be solved by the invention]
However, among the above-described conventional structures, the former has a fork-like terminal as a terminal of the wiring to be connected. Therefore, even if this fork-like terminal is fixed with a fixing screw, The fixing screw may be loosened or the fork-shaped terminal may gradually move away from the tightened state and finally come off the terminal block. The latter uses round terminals, so after fixing to the terminal block, it will not be detached from the terminal block due to long-term use like the former, but when attaching the round terminal to the terminal block, the fixing screw should be used. There is a problem that it is necessary to completely remove the terminal board from the terminal board, and the workability is slightly lowered as compared with the former.
[0006]
The present invention has been made to solve the above-described conventional problems, and enables connection / disconnection of the terminal of the connected wiring without removing the fixing screw from the terminal plate as in the prior art. In addition, an object is to provide a terminal block that is reduced in cost by reducing the number of parts as compared with the prior art.
[0007]
[Means for Solving the Problems]
In order to meet such a demand, the terminal block according to the present invention is provided with a first terminal plate having a screw hole and fixed to the terminal block body, and is vertically movable above the first terminal plate. A second terminal plate, a fixing screw inserted into a loose hole provided in the second terminal plate and screwed into the screw hole of the first terminal plate, a top portion of the fixing screw, and the second A spring member that is interposed between the first terminal plate and the second terminal plate, the spring member pressing the second terminal plate against the first terminal plate, and being connected between the first terminal plate and the second terminal plate A terminal block into which a terminal of a wiring is inserted, wherein the first terminal plate is formed of a conductive metal material, and is a protrusion for locking the terminals at symmetrical positions across the screw hole. Jo locking portion or locking hole is provided, and the position of these projected retaining portion or locking hole is provided At both ends on substantially an extension and fixing part is provided for fixing the first terminal plate to said terminal block body, said second terminal plate is made of a conductive metal material, and the loosely fitted symmetrically near both ends across the hole, and the first terminal plate pressing portion to be pressed downward is provided located on the side away from the screw hole with respect to the convex locking portion or locking hole, When the terminal is inserted between the first terminal plate and the second terminal plate, a locking hole portion or a convex locking portion provided in the terminal is formed on the first terminal plate. It engages with a convex locking part or a locking hole .
[0008]
When the terminal block according to the present invention described above is used, the second terminal plate and the second terminal plate pressed against the first terminal plate by the spring member with the fixing screw engaged with the screw hole of the first terminal plate. Since the terminal connected to the wire to be connected is inserted between the terminal board of 1 and when connecting the terminal of the wire to be connected to the terminal block as in the prior art, The process of screwing the fixing screw into the screw hole is unnecessary, and workability can be improved in this respect. Further, when the terminal of the connected wiring is connected to the terminal block, the locking hole portion or the convex locking portion provided in the terminal of the connected wiring is formed into the convex locking formed in the first terminal plate. Since the fixing screw is tightened in a state of being engaged with the portion or the locking hole, the terminal of the connected wiring does not come off from the terminal block even after many years of use.
[0009]
On the contrary, when removing the terminal of the wiring to be connected from the terminal block, the fixing screw is rotated in the reverse direction so as to be disengaged from the screw hole of the first terminal plate. It is possible to easily remove the connected wiring by weakening the terminal clamping force between the terminal board and the second terminal board and lifting the rear end of the terminal of the connected wiring with respect to the first terminal board. it can.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
1 (a) and 1 (b) show an embodiment of a terminal block according to the present invention, (a) shows one unit in a state where a terminal of a connected wiring is not attached, and (b) shows a plurality of wirings. The state which connected the connection unit and was couple | bonded by the coupling member is shown. FIG. 2 shows a state in which the terminal of the wiring to be connected is connected to the one wiring connection unit of the terminal block shown in FIG. FIG. 3 shows a developed state of the terminal block shown in FIGS. 1 and 2.
[0011]
In these drawings, reference numeral 10 denotes the overall structure of the terminal block, which is composed of a plurality of wiring connection units 10A, 10B,. Since each wiring connection unit has the same structure except for the end of the terminal block, the wiring connection unit 10A will be described as a representative.
[0012]
First, the wiring connection unit 10A includes a terminal block body 11b made of an electrically insulating material such as a synthetic resin, first and second metal terminal plates 12 and 13 incorporated therein, and a spring member 14 made of a coil spring. And the screw hole 12a provided in the first terminal plate 12 via the mating hole 15a of the stopper member 15 and the idler hole 13a opened in the stopper member 15, the spring member 14 and the second terminal plate 13. And a fixing screw 16 to be screwed in. The terminal block main body 11b constitutes a partition wall with the adjacent wiring connection unit, and has a function of fixing and fixing the above-described components arranged on the first terminal plate 12 by being fixed. Since this wiring connection unit 11b is located at the end of the terminal block 10, it is disposed so as to face the special terminal block main body 10a. Reference numeral 17 denotes a screw member that passes through the terminal block bodies 11 a, 11 b, 11 c... Arranged in alignment and cooperates with the nut member 18 to be assembled into one terminal block 10.
[0013]
The first terminal plate 12 is made of a conductive metal material, and the above-described screw hole 12a is formed in the central portion, and a screw groove is formed in the portion of the screw hole 12a. Convex locking portions 12b and 12c are formed at a position that is a predetermined distance away from the screw hole 12a with the screw hole 12a interposed therebetween. In this embodiment, these engaging portions 12b and 12c are formed by cutting and raising the plate material as apparent from FIGS. 1 (a), 2 and 3, and for this reason, the side closer to the screw hole 12a. Is separated from the plate material and has a steep side surface, and the side away from the screw hole 12a has a smooth curved surface. Further, fixing portions 12d and 12e are provided which are bent downward at the extending ends in the arrangement direction of the locking portions 12b and 12c of the screw holes 12a and are fitted into the mounting grooves 11b1 and 11b2 of the terminal block main body 11b. Furthermore, the end of the screw hole 12a in the direction orthogonal to the arrangement of the locking portions 12b and 12c is bent downward to reinforce the bending strength of the terminal board.
[0014]
The second terminal plate 13 is made of a conductive metal material. A loose hole 13a is formed in the center of the second terminal plate 13 so that the fixing screw 16 can be freely inserted therethrough. Indentations 13b and 13c are formed which are bent in the direction of one terminal board 12 and then rise in the opposite direction. This state is well illustrated in FIG. 1 (a) and FIG. Such depressions 13b and 13c are used to elastically hold the terminals of the connected wiring arranged between the first and second terminal plates 12 and 13 when the fixing screw 16 is tightened. Is provided. In other words, the second terminal plate 13 has a convex portion of the first terminal plate 12 in the vicinity of the symmetrical ends with the loose hole 13a formed in the center by forming the above-described depressions 13b and 13c. Pressing portions 13d and 13e for pressing the first terminal plate 12 downward are formed so as to be located on the side away from the screw hole 12a with respect to the shaped locking portions 12b and 12c.
[0015]
The spring member 14 has a function of urging the second terminal plate 13 downward, that is, toward the first terminal plate 12 when the fixing screw 16 is loosened. The stopper member 15 engages with the stopper pieces 11b3 and 11a1 formed on the terminal block main bodies 11b and 11a when the fixing screw 16 is loosened and moves upward, and the fixing screw 16 further moves upward. It has a function to regulate In this case, the base portion of the fixing screw 16 is not provided with a thread groove, and is formed with a diameter smaller than the thread, so that the loose hole 15a of the stopper member 15 is positioned at this portion and is rotatable. ing. The same operation can be performed even if the diameter of the loose hole of the stopper member 15 is larger than the thread of the fixing screw 16.
[0016]
The terminal block main bodies 11b and 11a are provided with a pair of positioning protrusions 11b5 and 11a2 protruding rightward, and these protrusions are formed in the positioning holes 11c5 and 11b5 of the opposing terminal block main bodies 11c and 11b. It is configured to be fitted. A stopper piece 11b6 for restricting the upward movement of the stopper member of the next unit is also provided on the surface of the terminal block body 11b opposite to the stopper piece 11b3.
[0017]
With this configuration, the terminals 21 and 22 connected to the to-be-connected wires are loosened by the fixing screw 16 and the stopper member 15 is locked to the stopper piece 11b3 of the terminal base body 11b. (A) It inserts horizontally between the 1st terminal board 12 and the 2nd terminal board 13 from the left-right direction. In this case, the end portion of the second terminal plate 13 has a rounded shape upward due to the formation of the recesses 13b and 13c described above, so that the end portions of the terminals 21 and 22 are easily received between the terminal plates. . And the front-end | tip of the terminals 21 and 22 inserted between the terminal boards 21 and 22 moves along the back of the latching parts 12b and 12c with roundness, and the hole 21a provided in the terminals 21 and 22 is provided. When the tips of 22a and 22a reach the steep ends of the locking portions 12b and 12c, they are dropped downward and settle in this state. In this state, the fixing screw 16 is tightened, and the first and second terminal plates are firmly tightened in cooperation with the spring member 14, thereby fixing the terminals 21 and 22. FIG. 2 shows this state.
[0018]
In such a state, the terminals 21 and 22 of the connected wiring cannot be removed from the above-described fixed state by the locking portions 12b and 12c even when used for many years, and each terminal of the connected wiring is stable. In this state, it can be fixed to the terminal block 10.
[0019]
Further, when the terminals 21 and 22 of the connected wiring are removed from the terminal block 10, the fixing screw 16 is rotated in the reverse direction to the tightening and moved upward together with the stopper member 15. Then, the fixing screw 16 is lifted to such an extent that the stopper member 15 is locked by the locking pieces 11b3 and 11a1 of the terminal block main bodies 11b and 11a. In this state, the tip of the fixing screw 16 is normally engaged with the screw hole 12 a of the first terminal plate 12, and the second terminal plate 13 is weakly pushed downward by the spring force of the spring member 14. . In a state where the clamping force is weak, the operator can easily remove the terminals 21 and 22 by lifting the end of the terminal of the connected wiring upward and pulling it out in that state.
[0020]
As described above, by adopting the configuration of this embodiment, it becomes possible to attach or remove the terminal of the connected wiring without removing the fixing screw from the terminal plate as in the prior art, thereby improving workability. Can be made. In addition, by adopting the configuration of this embodiment, it is possible to provide a terminal block with a reduced number of parts as compared with the prior art and cost reduction.
[0021]
FIG. 4 shows another embodiment of the present invention. The difference from the above-described embodiment is that the structures of the first terminal board 12 and the second terminal board 13 are slightly changed. It is. That is, in the above-described embodiment shown in FIGS. 1 to 3, the locking portions 12b and 12c provided on the first terminal plate 12 are formed by cutting, but the first terminal of this embodiment is used. The locking portions 12b1 and 12b2 formed on the plate 12A are formed as thick protrusions by drawing. Further, the second terminal board 13 is inclined downwardly from the central part where the play hole 13a is opened toward the end part to give the elasticity in the vertical direction, and is formed in the center by this inclination. A pressing portion 13d for pressing the first terminal plate 12 downwardly, located on the side away from the screw hole 12a with respect to the convex locking portions 21a, 22a, in the vicinity of both ends symmetrical with the loose hole 13a interposed therebetween. 13e is formed. Further, both end portions of the second terminal plate 13A are bent upward so that a terminal to which a wiring to be connected is connected can be easily inserted between the terminal plates 12A and 13A. Other structures are the same as those shown in FIGS. It will be easily understood that even with such a structure, the same effects as those of the above-described embodiment can be obtained.
[0022]
FIG. 5 and FIG. 6 show still another embodiment of the present invention. The first and second terminal plates are formed in a V shape and the terminal block is covered even when it is arranged in a narrow place. The connection wiring terminals can be attached more easily than the embodiment shown in FIGS. 1 to 3 described above. The first terminal board 12B shown in FIGS. 5 and 6 has a V-shaped portion where the locking portions 12b1 and 12b2 are formed. Therefore, the screw hole 12a is located at the bottom of the V-shape. become. The other parts have the same configuration as in the previous embodiments.
[0023]
Further, in the second terminal board 13B, the depressions 13b1 and 13b2 corresponding to the depressions 13b and 13c of the second terminal board 13 shown in the embodiment of FIGS. 1 to 3 are V of the first terminal board 12B. The outer wall of the recess away from the screw hole 13a is formed in a V shape in accordance with the letter shape. In this case, both ends of the second terminal board 13B are bent upward in the same manner as the terminal board 13 shown in FIGS. In addition, in order to give bending strength, both ends of the bent portion close to the screw hole 12a are further bent inward as shown in FIG.
[0024]
Further, as can be seen from FIGS. 5 and 6, the recesses 13b1 and 13b2 formed in the second terminal plate 13B are deepest at the portion adjacent to the loose hole 13a, and from the loose hole 13a to the end. It has a shape that becomes shallower as it goes. The fixing screw 16 is longer than that of the embodiment shown in FIGS. 1 to 4, and the tip of the fixing screw 16 is the bottom of the recess 11f of the terminal block body 11b facing the screw hole 12a of the first terminal plate 12B. It is screwed into the screw hole 11d opened in the part. Even if the stopper member 15 disposed between the top of the fixing screw 16 and the spring member 14 is locked to the stopper piece 11b3 ′ formed on the terminal block body 11b, the length of the fixing screw 16 is still the same. The length is determined so that the tip is engaged with the screw hole 11d.
[0025]
With the structure as shown in FIG. 5 and FIG. 6, the end portions of the terminal plates 12B and 13B into which the terminals 21 and 22 of the wiring to be connected are inserted are disposed obliquely upward. The terminal can be easily mounted even when the table is accommodated or arranged in a narrow place. In such a structure, the first terminal plate is fixed to the terminal base body by the fixing portions provided at both ends of the first terminal plate in the above-described embodiment, but the first terminal plate is attached to the fixing screw 16. The terminal plates 12, 13, the spring member 14, and the stopper member 15 are supported by a fixing screw 16 whose tip is always screwed into the screw hole 11d of the terminal base body 11b, and the terminal plate 12B The V-shape is a guide for the second terminal plate 13B, the spring member 14 and the fixing screw 14 disposed thereon, and is always positioned so as to face the screw hole 12a of the first terminal plate 12B. Since these members are surrounded on the opposite side surfaces by the terminal block main body, it is possible to easily mount the fixing screws during assembly.
[0026]
In each of the above-described embodiments, the first terminal plate is provided with a protruding locking portion, and the terminal of the connected wiring is provided with a hole that engages with the locking portion. Of course, the first terminal plate may be provided with a locking hole, and the terminal may be provided with a protrusion that engages with the locking hole.
[0027]
【The invention's effect】
As described above, when the terminal block according to the present invention is used, the second screw that is pressed against the first terminal plate by the spring member with the fixing screw engaged with the screw hole of the first terminal plate. Since the terminal connected to the wiring to be connected is inserted between the terminal board and the first terminal board , the terminal of the wiring to be connected is connected to the terminal block as in the prior art. Sometimes, the process of screwing the fixing screw into the screw hole in an unstable state is not necessary, and the workability can be improved in this respect. Further, when the terminal of the connected wiring is connected to the terminal block, the locking hole portion or the convex locking portion provided in the terminal of the connected wiring is formed into the convex locking formed in the first terminal plate. because it is tightened parts or engaging hole and engagement with the fixed screws, terminals of the wiring to be connected nor out of the terminal block by years of use.
[0028]
On the contrary, when removing the terminal of the wiring to be connected from the terminal block, the fixing screw is rotated in the reverse direction so as to be disengaged from the screw hole of the first terminal plate. It is possible to easily remove the connected wiring by weakening the terminal clamping force between the terminal board and the second terminal board and lifting the rear end of the terminal of the connected wiring with respect to the first terminal board. it can.
[Brief description of the drawings]
1A and 1B show an embodiment of a terminal block according to the present invention, in which FIG. 1A is a sectional view of a wiring connection unit as a main part, and FIG. 1B is an assembly in which the wiring connection units shown in FIG. It is a side view which shows a state.
2 is a cross-sectional view showing a state in which a terminal of a to-be-connected wiring is connected to the terminal block shown in FIG.
FIG. 3 is a diagram showing a state in which the embodiment of the present invention shown in FIGS. 1 and 2 is developed.
FIG. 4 is a cross-sectional view showing another embodiment of the present invention.
FIG. 5 is a cross-sectional view showing still another embodiment of the present invention.
6 is a diagram showing a state where the embodiment of FIG. 5 is developed. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Terminal block, 10A, 10B, 10C ... Wire connection unit, 11a, 11b ... Terminal block main body, 11a1, 11b3, 11b3 ', 11b6 ... Stopper piece, 11a2, 11b5 ... Positioning projection, 11b5, 11c5 ... Positioning hole, 12, 12A, 12B ... 1st terminal board, 11d, 12a ... Screw hole, 12b, 12b1, 12b2, 12c ... Locking part, 12d, 12e ... Fixing part , 13, 13B ... 2nd terminal board, 13a ... Loose holes, 13b, 13b1, 13b2, 13c ... depressions, 13d, 13e ... pressing parts, 14 ... spring members, 15 stopper members, 16 ... fixing screws, 17 ... screw members, 18 ... nut members, 21, 22 ... terminals .

Claims (4)

A first terminal plate (12) that has a screw hole (12a) and is fixed to the terminal block body (11a, 11b,...), And is disposed above the first terminal plate (12) so as to be vertically movable. The second terminal plate (13) and the loose hole (13a) provided in the second terminal plate (13) are inserted into the screw hole (12a) of the first terminal plate (12). A fixing screw (16) to be screwed into the first terminal, and the second terminal plate (13) interposed between the top of the fixing screw (16) and the second terminal plate (13). A spring member (14) that presses against the plate (12), and between the first terminal plate (12) and the second terminal plate (13), terminals (21, 22) of the wiring to be connected are provided. A terminal block to be inserted,
The first terminal plate (12) is formed of a conductive metal material, and is a convex lock for locking the terminals (21, 22) at symmetrical positions across the screw hole (12a). parts (12b, 12c) or locking hole is provided, and these projected retaining portion (12b, 12c) or the first terminal plate on both ends on substantially an extension of the position locking hole is provided (12) is provided with fixing portions (12d, 12e) for fixing the terminal block body (11a, 11b,...)
The second terminal plate (13) is formed of a conductive metal material, and has a convex locking portion (12b, 12c) or locking in the vicinity of both ends symmetrical with respect to the loose hole (13a). pressing portion pressing the first terminal plate located on the side away from the threaded holes (12a) with respect to the hole (12) downward (13d, 13e) is provided,
When the terminal (21, 22) is inserted between the first terminal plate (12) and the second terminal plate (13), the latch provided on the terminal (21, 22) The terminal block, wherein the hole (21a, 22a) or the convex locking portion engages with the convex locking portion (12b, 12c) or the locking hole of the first terminal plate (12). The first terminal plate (12) is formed in a V shape, and the screw hole (12a) is positioned at the bottom of the V shape, and the second terminal plate (13) is also the first terminal plate (13). The terminal block according to claim 1, wherein the terminal block is formed in accordance with the shape of the terminal plate. The terminal block body (11a, 11b,...) Includes a stopper piece (11b3) that engages with a stopper member (15) disposed between the top of the fixing screw (16) and the spring member (14). The terminal block according to claim 1 , wherein the terminal block is provided. The first terminal plate (12) fixed to the terminal block body (11a, 11b,...) According to any one of claims 1 to 3, and the first terminal plate (12). The first terminal plate (12) is inserted into a second terminal plate (13) disposed so as to be movable up and down and a loose hole (13a) provided in the second terminal plate (13). A fixing screw (16) to be screwed into the screw hole (12a), and a second terminal plate (13) interposed between the top of the fixing screw (16) and the second terminal plate (13). And the spring member (14) that presses the first terminal plate (12) to form a plurality of wiring connection units (10A, 10B,...), And the wiring connection units (10A, 10B,...) Are aligned. Terminal block arranged and connected by a connecting member (17) .

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