JP3800334B2 - Short-circuit plate for withstand voltage test - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is used for a withstand voltage test of a terminal block used for connecting wiring wires in various control panels and the like, and for a withstand voltage test of various control panels and other device bodies using the terminal block. The present invention relates to a short-circuit plate for a withstand voltage test.
[0002]
[Prior art]
As a conventional instrument of this type, a plurality of connecting pieces each having a U-shaped fastening seat fastened and fixed to a protruding end by a terminal screw are integrally connected to each other via a plate-like bridge portion. And, as the adjustment part that absorbs the expansion / contraction change of the adjacent interval of the fastening seat to the bridging part, a bent part that bends toward the front or back side of the plate surface constituting the bridging board. There is a short circuit plate (Patent Document 1) for formed terminals.
[0003]
According to the short-circuit plate of Patent Document 1, the bent portion of the adjustment unit is expanded and contracted using pliers or the like, so that a single short-circuit plate can be used as a plurality of types of terminal blocks having various connection terminal pitches. It can be appreciated that in this respect it has some advantages.
[0004]
However, the withstand voltage test that these short-circuit plates set for this purpose, for example, applies a voltage of 1500 V continuously between the terminal and the ground (chassis) for 1 minute, or applies a voltage of 2000 V continuously for 1 minute. The test itself can be completed within a short period of time. On the other hand, the short-circuit plate short-circuits all the connection terminals by inserting and tightening the U-shaped fastening seat between the screw and the terminal piece of each connection terminal. Unnecessary long time is required for setting the short-circuit plate. This is an inefficiency that cannot be tolerated when conducting withstand voltage tests on a large number of terminal blocks.
[0005]
In addition, in this type of appliance of the conventional example, there are a plurality of U-shaped connections formed in an elongated shape in an electric device having a plurality of terminal portions and a short-circuit plate that short-circuits the plurality of terminal portions of the electric device. A connecting portion for connecting the fixing portion and both side pieces of the U-shaped connecting fixing portion, wherein the connecting portion is formed so as to be cutable, and the adjacent side piece portion of the U-shaped connecting fixing portion is a crossover portion. There is a short-circuit plate (patent document 2) of the connected electric equipment terminal portion.
[0006]
According to the short-circuit plate of Patent Document 2, since it can be easily cut at the connecting portion, it is recognized that there is an advantage that it can be used by cutting according to the number of connection terminals arranged in the terminal block. .
[0007]
However, the short circuit plate of Patent Document 2 also has a U-shaped connection fixing portion. Like that of Patent Document 1, the U-shaped connection fixing portion is interposed between a screw and a terminal piece of each connection terminal. There is a problem that an unnecessary long time is required for the set, just like the short-circuit plate of Patent Document 1.
[0008]
Further, in this type of conventional device, the conductive plate is refracted at a substantially right angle at the center portion to form a mounting plate and a short-circuit plate. There is a terminal board short-circuit piece (Patent Document 3) in which a groove is provided from the center of the edge to the short-circuit plate to form two attachment portions, and holes or cuts are provided in the attachment portions, respectively.
[0009]
According to the short-circuit piece of Patent Document 3, since the short-circuit plate is provided with unevenness, it is certain that the strength against deformation at the time of creation, attachment to the terminal board, or use can be improved. .
[0010]
However, the attachment to the terminal board is performed using the holes or cuts in the attachment portion, and there is a problem that it takes unnecessary long time for the attachment, just like Patent Documents 1 and 2.
[0011]
Furthermore, as a conventional instrument of this type, in a terminal board for screwing a conductive plate to a terminal block, an engaging groove is formed in the conductive plate, and the conductive plate is attached to the terminal board in a detachable manner. There is a terminal board (Patent Document 4) that includes an engagement piece that is detachably engaged with an engagement groove of a plate.
[0012]
According to the terminal board of the above-mentioned patent document 4, the short-circuit plate is simply set on the terminal board by inserting the engagement piece into the engagement groove of the conductive plate, and the connection terminals of the terminal board are short-circuited. be able to. However, this terminal board has a special configuration in which an engagement groove is formed in the conductive plate that constitutes the connection terminal, and the short-circuit plate has a corresponding configuration, and is a simple instrument. It is a thing that cannot be said.
[0013]
In addition, as a conventional instrument of this type, there is a terminal block with an attachment (PTL 5) which is a terminal block to which an electric wire is connected, and is provided with a connector-type attachment to which an adapter can be connected. .
[0014]
The terminal block with an attachment of the above-mentioned patent document 5 can be easily obtained by inserting an attachment into this terminal block when a withstand voltage test of the terminal block is required, and inserting a short-circuit adapter for short-circuiting each connection terminal into this attachment. It is something that can be prepared. However, the attachment-attached terminal block of Patent Document 5 is a large-scale device and cannot be manufactured at low cost, and cannot be said to be an instrument for easily short-circuiting the connection terminals.
[0015]
[Patent Document 1]
JP-A-9-139244 [Patent Document 2]
Japanese Patent Laid-Open No. 2002-260752 [Patent Document 3]
JP 2000-164268 A [Patent Document 4]
Japanese Utility Model Publication No. 5-84047 [Patent Document 5]
Japanese Patent Laid-Open No. 6-283224 [0016]
[Problems to be solved by the invention]
The present invention eliminates the problems of the prior art as described above, and is a simple withstand voltage test short-circuit plate that can be set between each connection terminal of the terminal block with almost one touch and short-circuited between them. Providing it is a problem to be solved.
[0017]
[Means for Solving the Problems]
1 of the present invention is a short-circuit plate body made of a conductive metal;
An elastic locking portion configured on both sides of the short-circuit plate body, and a conductor formed in a folded state downward to be locked by a cover locking recess located on both sides of the terminal block. A metal elastic locking part;
A plurality of elastic contact pieces projecting from the short-circuit plate main body through the elastic locking portion on one side, and made of conductive metal arranged corresponding to the arrangement pitch of the connection terminals of the corresponding terminal block A contact piece;
It is the short circuit board for withstand voltage tests comprised by these.
[0018]
2 of the present invention is the short-circuit plate of the withstand voltage test according to 1 of the present invention, wherein the short-circuit plate of the other withstand-voltage test short-circuit plate arranged in series from a part of the short-circuit plate body. The terminal piece for connecting to the main body is projected.
[0019]
According to a third aspect of the present invention, in the short-circuit plate for withstanding voltage test according to the second aspect of the present invention, the terminal piece protrudes obliquely upward from the end portion of the short-circuit plate body in a direction perpendicular to the length direction thereof, A circular hole is drilled in.
[0020]
According to a fourth aspect of the present invention, in the short-circuit plate for withstanding voltage test according to the first, second or third of the present invention, the short-circuit plate main body and the elastic locking portion are subjected to insulation treatment.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is for a withstand voltage test comprising a short-circuit plate main body, elastic locking portions respectively formed on both sides of the short-circuit plate main body, and a plurality of elastic contact pieces protruding from the elastic locking portion on one side. It is a short-circuit plate.
[0022]
In principle, the short-circuit plate body is configured to have a length corresponding to the length of the terminal block to which the short-circuit plate body is attached. Of course, it comprises a conductive metal. Although various configurations can be freely adopted, it is appropriate to integrally form a metal plate made of an elastic conductor together with the elastic locking portion and the plurality of elastic contact pieces. As this metal plate material, a stainless spring plate, a phosphor bronze plate for a spring, a spring steel plate or the like is suitable.
[0023]
The elastic locking portions are respectively configured on both sides of the short-circuit plate body. As described above, it is appropriate to form a metal plate integrally with both sides of the short-circuit plate main body, but it may be configured separately and coupled to both sides of the short-circuit plate main body. The two elastic locking portions are arranged in such a manner that the short-circuit plate main body is positioned on the upper portion of the terminal block, so that both of the elastic lock portions are locked to the cover-engaging recesses located on both sides of the terminal block. It is formed in a folded state downward from both sides of the main body.
[0024]
For the sake of convenience of constituting the elastic contact piece through this, the one side elastic locking part is suitably formed in a shape that folds it over the entire side part of the short-circuit plate body, The elastic locking portion on the other side only needs to be able to be securely locked, so that an appropriate number of arm pieces corresponding to the length of the short-circuit plate body are extended from the short-circuit plate body to the side and folded back. It is appropriate to configure. Further, the other side elastic locking portion is further provided with a knob portion whose front end side is turned upside down, and the other gripping portion is held in the terminal block cover locking recess. It is preferable to be able to remove the elastic locking portion on the side.
[0025]
The elastic contact piece is a plurality of constituent portions protruding from the short-circuit plate body through the one elastic locking portion, and in principle, these are the number and arrangement pitch of the connection terminals of the terminal block to be attached. It arranges corresponding to. However, when the terminal block is very long, etc., the short-circuit plate body is configured to be shorter than the terminal block, and the connection terminal is configured to be a small number corresponding to the terminal block. It is good also as making the usage of setting a short circuit board.
[0026]
In addition, the protruding direction of each elastic contact piece is set so that the elastic contact piece is in pressure contact with the connection terminal of the terminal block in a state where the short-circuit plate body is attached to the terminal block. As described above, it is appropriate that the elastic contact piece is integrally formed of a conductive metal plate material together with the short-circuit plate body and the elastic locking portion. Of course, these may be configured separately and connected to the short-circuit plate main body via the corresponding elastic locking portion.
[0027]
Therefore, according to the short-circuit plate for withstanding voltage test of the present invention, this is set on the terminal block corresponding to the terminal block extremely easily and speedily, and the elastic contact pieces thereof are screw heads of the corresponding connection terminals of the terminal block. All the connection terminals can be short-circuited through the elastic locking portion and the short-circuit plate body. Thus, a withstand voltage test power source can be connected between the short-circuit plate body and the chassis (earth), and the withstand voltage test can be quickly performed, and the withstand voltage test of various control panels and other device bodies connected thereto can be performed. it can.
[0028]
The method of attaching the short-circuit plate for withstanding voltage test of the present invention to the terminal block will be described in some detail as follows. That is, first, each elastic contact piece is brought into contact with the tightening screw head of each connection terminal of the corresponding terminal block. Next, in this state, the elastic locking portion on the side constituting the elastic contact piece is locked to the cover locking concave portion on the corresponding side portion of the terminal block. Subsequently, the elastic locking portion on the other side is locked to the concave portion for locking the cover on the other side. This completes the mounting operation, which is an extremely simple and speedy operation.
[0029]
If the terminal block is long, two or more withstand voltage shorting plates may be attached in series in the same manner. Naturally, the mutual connected in series electrically connects the short-circuit plate bodies.
[0030]
Each of the elastic contact pieces maintains a reliable contact with the fastening screw of the connection terminal due to its elasticity, and the elastic locking portion similarly has a reliable locking state with respect to the cover locking recess due to its elasticity. Can be held.
[0031]
The short-circuit plate for withstanding voltage test according to the present invention can be mounted in the same manner even when the cover is set on the terminal block by configuring the short-circuit plate with a slight margin. At this time, the elastic contact piece can enter the inside of the cover from the side portion of the terminal block and be brought into contact with the tightening screw head of the connection terminal.
[0032]
The withstand voltage test short-circuit plate attached in this manner can be easily obtained by removing the elastic locking portion on the other side (the elastic locking portion that does not constitute the elastic contact piece) from the corresponding cover locking recess. The whole will come off from the terminal block.
[0033]
In addition, if the terminal piece for connecting to a withstand voltage test power supply protrudes from a part of the short circuit board main body, the withstand voltage test power supply can be easily and reliably connected to the short circuit board main body through this. . In addition, when a plurality of withstand voltage test short-circuit plates are attached in series to the terminal block, the adjacent ones can be easily electrically connected using the mutual terminal pieces to short-circuit each other. In addition, if the terminal piece protrudes obliquely upward from the end of the short-circuit plate body in a direction perpendicular to the length direction, and a circular hole is drilled at the tip, a connector such as a banana plug or other It is possible to freely connect a connector or the like that is externally connected to the terminal piece, and it is extremely difficult to connect a power source for a withstand voltage test or to electrically connect a plurality of withstand voltage test short-circuit plates arranged in series. It will be convenient.
[0034]
Moreover, if the insulation process is given to the said short-circuit board main body and the said elastic latching | locking part, the safety | security in the withstand voltage test can be ensured. As the insulation treatment, it is appropriate to cover the corresponding part with various insulating materials. For example, coating with an insulating paint or the like is performed.
[0035]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 (a) to 1 (e) and FIG. 2, the short-circuit plate for a withstand voltage test of this embodiment has a short-circuit plate body 1, an elastic locking portion 2a configured on one side, and the other side. The four elastic locking pieces (elastic locking portions) 2b, 2b..., 26 elastic contact pieces 3, 3... Projected from the elastic locking portion 2a on one side, and the test voltage power source In this embodiment, all of these components are integrally formed by punching and bending a stainless spring plate.
[0036]
The short-circuit plate body 1 is configured to have a length corresponding to the length of the terminal block 5 to which the short-circuit plate body is attached and used, and the width thereof is as shown in FIGS. 1 (a) and 1 (b). In addition to the thickness of the stainless steel spring plate, the strength is set so as to ensure an appropriate strength to maintain this form.
[0037]
As shown in FIGS. 1 (c), (d) and FIG. 2, the elastic locking portion 2a on one side folds the corresponding side portion of the short-circuit plate body 1 into a semicircular arc shape, thereby The terminal block 5 can be locked in the cover locking recesses 7, 7 formed on the side walls 6, 6. The other side elastic locking pieces 2b, 2b,..., As shown in FIGS. 1A to 1D, are arms 2b1 extending in a direction perpendicular to the length direction of the short-circuit plate body 1, respectively. Further, the engaging portion 2b2 is formed by folding the tip side into a semicircular arc shape, and the knob 2b3 is formed by folding the tip side in the opposite direction.
[0038]
As shown in FIGS. 1A to 1E and FIG. 2, the elastic contact pieces 3, 3... Are connected to the connection terminals 8 of the terminal block 5 to be attached from the outer end of the one elastic locking portion 2a. 8 are arranged in correspondence with the arrangement pitch of 8. Further, as will be described later, the elastic contact pieces 3, 3... Are in pressure contact with the fastening screws 9 of the connection terminals 8, 8. In this way, the protruding direction is set in advance.
[0039]
Further, the terminal pieces 4 and 4 are each protruded obliquely upward from both ends of the short-circuit plate body 1 in a direction perpendicular to the length direction, and a circular hole is formed at the tip thereof.
[0040]
The terminal block 5 to which the withstand voltage test short-circuit plate of this embodiment is attached will be briefly described. As shown in FIGS. 3 (a), (b), and (c), there are 26 terminal blocks. Are arranged in a state where partition walls 6, 6... Are interposed between adjacent ones. .. Are formed on both side portions of the partition walls 6, 6. Further, as described above, a fastening screw 9 is arranged on each of the connection terminals 8, 8... So that the crimp terminal can be inserted between the connection terminal 8 and the connection terminal 8 to be fastened and fixed. .
[0041]
Therefore, according to the short-circuit plate for a withstand voltage test of this embodiment, this is set on the terminal block 5 very simply and speedily, and the elastic contact pieces 3, 3. All of the connection terminals 8, 8... Can be short-circuited through the elastic locking portion 2 a and the short-circuit plate body 1 by contacting the heads of the fastening screws 9 of the connection terminals 8, 8. Therefore, a withstand voltage test power supply is connected between the short-circuit plate body 1 and the chassis using the terminal piece 4 to quickly withstand the withstand voltage test and the resistance of the control panel and other apparatus bodies using the same. A voltage test can be performed.
[0042]
The withstand voltage test short-circuit plate of this embodiment can be attached to the terminal block 5 very simply as follows.
First, the elastic contact pieces 3, 3... Enter above the connection terminals 8, 8, respectively, slightly from the side of the terminal block 5, as shown in FIGS. 4 (a) and 6 (a). And the lower end of the tip is brought into contact with the heads of the tightening screws 9, 9... As shown in FIG. 4 (b). Then, in this state, the elastic locking portion 2a is moved to the terminal block. 5 is engaged with the cover-engaging recesses 7, 7.
[0043]
Subsequently, as shown by an arrow in the figure, the elastic locking portion 2a is rotated downward about the vicinity, and the other elastic locking pieces 2b, 2b,. It is made to latch in the side cover latching recessed part 7,7 .... In this way, the work for attaching the short-circuit plate for withstanding voltage test is completed very easily and speedily.
[0044]
In such an attached state, each of the elastic contact pieces 3, 3... Retains reliable contact with the fastening screws 9 of the connection terminals 8, 8. A short circuit between 8 can be reliably realized. Similarly, the elastic locking portions 2a and the elastic locking pieces 2b, 2b... Are securely locked to the cover locking recesses 7, 7... On both sides of each partition wall 6, 6. The state is maintained, and as a result, the above-described contact with the fastening screws 9 of the connection terminals 8, 8... Of the elastic contact pieces 3, 3,.
[0045]
In addition, the withstand voltage test power supply can be easily and reliably connected to the short-circuit plate body 1 with any one of the terminal pieces 4 and 4 projecting on the side thereof by, for example, a connector that covers the terminal piece 4 or 4. Can be connected to.
[0046]
After performing the withstand voltage test in this manner, the withstand voltage test short-circuit plate attached as described above holds the elastic locking pieces 2b, 2b,. .. Can be easily removed from the terminal block 5 by removing the cover-retaining recesses 7, 7...
[0047]
In addition, even in the state where the cover is set on the terminal block 5, the short-circuit plate for the withstand voltage test of this embodiment does not cover the side portion of the terminal block 5, so This can be attached to the terminal block 5.
[0048]
【The invention's effect】
According to the short-circuit plate for withstanding voltage test of 1 of the present invention, it can be easily and speedily attached to the terminal block, and its mounting state is assured, and the target terminal block and this are used. It is possible to satisfactorily perform a withstand voltage test on the control panel and other device bodies.
[0049]
According to the short-circuit plate for withstanding voltage test 2 of the present invention, it is easy and reliable to connect with a withstand-voltage test power source or another short-circuit plate for withstanding voltage testing arranged in series with the terminal block.
[0050]
According to the short-circuit plate for a withstand voltage test according to the third aspect of the present invention, various types of connectors can be used to easily and reliably connect the withstand voltage test power source and other short-circuit plates for withstand voltage tests arranged in series with the terminal block. Can be done.
[0051]
According to the short-circuit plate for withstand voltage test 4 of the present invention, the withstand voltage test can be performed safely.
[Brief description of the drawings]
FIG. 1A is a front view of a short-circuit plate for a withstand voltage test of one embodiment. (b) is a rear view of a short-circuit plate for a withstand voltage test of one embodiment.
(c) is a plan view of a short-circuit plate for a withstand voltage test of one embodiment.
(d) is a bottom view of a short-circuit plate for a withstand voltage test of one embodiment.
(e) is a right side view of the short-circuit plate for withstanding voltage test of one embodiment.
FIG. 2 is an enlarged plan view of a short-circuit plate for a withstand voltage test according to an embodiment.
FIG. 3A is a front view of a terminal block to which a short-circuit plate for a withstand voltage test of one embodiment is attached.
(b) is a bottom view of the terminal block to which the withstand voltage test short-circuit plate of one embodiment is attached.
(c) is the sectional view on the AA line section of (a).
FIG. 4A is a cross-sectional view showing a state at the time when an operation for attaching a short-circuit plate for a withstand voltage test of one embodiment to a terminal block to be attached is started.
(b) is the point when the elastic contact piece of the short-circuit plate for withstanding voltage test is brought into contact with the head of the terminal block and the elastic locking part is locked to the cover locking recess on one side. Sectional drawing which shows the state.
FIG. 5 is a cross-sectional view showing a state where a withstand voltage test short-circuit plate of one embodiment is attached to a terminal block to be attached.
FIG. 6A is a front view showing a state at the time when an operation of attaching the short-circuit plate for withstanding voltage test of one embodiment to the terminal block to be attached is started.
(b) is the front view which shows the state which attached the short circuit board for a withstand voltage test of one Example to the terminal block of attachment object.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Short-circuit board body 2a Elastic locking part 2b Elastic locking piece 2b1 Arm 2b2 Locking part 2b3 Knob piece 3 Elastic contact piece 4 Terminal piece 5 Terminal block 6 Bulkhead 7 Cover locking recess 8 Connection terminal 9 Tightening screw

Claims (4)

A short-circuit plate body made of a conductive metal;
An elastic locking portion configured on both sides of the short-circuit plate body, and a conductor formed in a folded state downward to be locked by a cover locking recess located on both sides of the terminal block. A metal elastic locking part;
A plurality of elastic contact pieces projecting from the short-circuit plate main body through the elastic locking portion on one side, and made of conductive metal arranged in correspondence with the arrangement pitch of the connection terminals of the corresponding terminal block A contact piece;
A short-circuit plate for withstanding voltage tests composed of 2. A short circuit for withstand voltage test according to claim 1, wherein a terminal piece for connecting to a short circuit plate body of a withstand voltage test power source or another short circuit plate for withstanding voltage test arranged in series is projected from a part of the short circuit plate body. Board. The short-circuit plate for a withstand voltage test according to claim 2, wherein the terminal piece protrudes obliquely upward from the end portion of the short-circuit plate body in a direction perpendicular to the length direction, and a circular hole is formed at the tip. The withstand voltage test short-circuit plate according to claim 1, 2 or 3, wherein the short-circuit plate main body and the elastic locking portion are subjected to insulation treatment.

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