JP6710956B2 - Terminal cover and test method - Google Patents

Description

The present invention relates to a terminal cover attached to a terminal block and a test method.

In the alarm test, an alarm circuit is configured by connecting a fuse clip to a terminal to be subjected to the alarm test among a plurality of terminals on the terminal block, and the alarm test is performed. In such an alarm test, in order to avoid short circuits and miss-strips, of the multiple terminals on the terminal block, only the terminals subject to the alarm test are opened, and the remaining terminals are cured with vinyl tape. It was

As related technologies, conventionally, there have been various technologies for avoiding a short circuit and a miss strip due to connecting a fuse clip to a wrong terminal in a terminal block in an alarm test or the like (for example, Patent Documents 1 to 9 below). See.).

JP, 2010-159991, A JP, 2010-210581, A JP, 2010-218947, A JP, 2011-181434, A JP, 2008-41423, A JP2012-129067A JP, 9-245854, A JP2012-57958A Japanese Utility Model Publication No. 4-18971

However, in the above-described conventional technique, for example, it is complicated to attach and detach the terminal cover to and from the terminal block, and it takes a lot of time to connect and disconnect the wiring, so that a load such as an alarm test is increased. Then, there was a problem that it was not practical. In addition, the above-described conventional technique cannot be used depending on the work environment or requires a large amount of space because it requires a large space for attaching the terminal cover or has a complicated configuration. There was a problem that it was laborious and impractical.

As described above, the above-described conventional technique is troublesome and troublesome in the work before the work such as tightening the terminal screw into the terminal box or fixing the lead wire for the originally intended test. There was a problem. Further, the above-mentioned conventional technique has a problem that it is not practical because, for example, the cost for installation and manufacturing increases with the increase in size and complexity, and the usable working environment is limited.

The present invention solves the above-mentioned problems of the prior art. Therefore, regardless of the working environment, the terminal screw can be easily and surely tightened into the terminal box and the lead wire can be securely fixed, and a test. The purpose is to provide a method.

In order to solve the above-mentioned problems and to achieve the object, a terminal cover according to the present invention is detachably attached to a terminal block provided with a plurality of terminal block screws arranged in the assembling direction and the column direction. It is characterized in that it has a notch cut out so that a part of the terminal block screws is exposed.

Further, the test method according to the present invention is detachably attached to a terminal block provided with a plurality of terminal block screws arranged in the assembling direction and the column direction. A plurality of types of terminal covers in which the positions of the notches cut out so that the terminal block screws are exposed differ in the assembling direction and the column direction, and terminals that are detachably attached to the terminal block and are not provided with the notches. The test is performed by using at least a part of the cover and the terminal cover, and covering the terminal block screws not involved in the test among the plurality of terminal block screws.

According to the terminal cover and the test method of the present invention, the terminal screw can be easily and surely tightened into the terminal box and the lead wire can be securely fixed regardless of the working environment.

It is explanatory drawing (the 1) which shows a terminal block. It is explanatory drawing (the 2) which shows a terminal block. It is explanatory drawing (the 1) which shows the terminal cover for alarm tests of embodiment concerning this invention. It is explanatory drawing (the 2) which shows the terminal cover for alarm tests of embodiment concerning this invention. It is explanatory drawing (the 3) which shows the terminal cover for alarm tests of embodiment concerning this invention. It is explanatory drawing (the 4) which shows the terminal cover for alarm tests of embodiment concerning this invention. It is explanatory drawing (the 5) which shows the terminal cover for alarm tests of embodiment concerning this invention. It is explanatory drawing (the 6) which shows the terminal cover for alarm tests of embodiment concerning this invention. It is explanatory drawing (the 7) which shows the terminal cover for alarm tests of embodiment concerning this invention.

Preferred embodiments of a terminal cover and a test method according to the present invention will be described in detail below with reference to the accompanying drawings.

(Terminal block configuration)
First, a terminal block using the alarm test terminal cover according to the embodiment of the present invention will be described. 1 and 2 are explanatory views showing a terminal block. FIG. 1 shows the external appearance of the terminal block provided in the switchboard, and FIG. 2 shows a cross section of the terminal block provided.

In FIGS. 1 and 2, the terminal block 100 includes a plurality of terminal block screws 101. The terminal block 100 is provided, for example, on a switchboard that receives electric power (electricity) from a power transmission network and supplies the received electric power to demand equipment. The plurality of terminal block screws 101 are covered with a plastic cover (terminal cover) 102 in a normal state (when an alarm test or the like is not performed).

The cover 102 is provided so as to be removable from the terminal block 100. The cover 102 is attached to the terminal block 100 so as to cover the plurality of terminal block screws 101 attached to the terminal block 100 from the front side of the terminal block 100. The cover 102, when attached to the terminal block 100, opens the side of the terminal block 100.

In the terminal block 100, a plurality of terminal block screws 101 connected to the wiring for the inside of the switchboard (wiring inside the panel) 103 and a plurality of terminal blocks connected to the wiring for the outside of the switchboard (wiring outside the panel) 104 Screws 101 and are provided. The switchboard may be installed indoors or outdoors.

In the terminal block 100, among a plurality of terminal block screws 101 provided on the terminal block 100, a terminal block screw 101 (terminal block screw 101a) connected to the in-board wiring 103 and a terminal connected to the outboard wiring 104. The base screws 101 (terminal base screws 101b) are linearly arranged in a line. The terminal block 100 is installed and used, for example, in a state in which a row formed by the terminal block screws 101a and 101b extends in the vertical (vertical) direction.

In the terminal block 100, the row formed by the terminal block screws 101a and the row formed by the terminal block screws 101b are arranged such that the terminal block screws 101a and 101b forming each row are arranged side by side in pairs. There is. As a result, in the terminal block 100, a set including the terminal block screws 101a and 101b is linearly arranged in a line along the column direction of the terminal block screws 101a and 101b.

In the terminal block 100, the number of terminal block screws 101 arranged in the vertical direction can be determined according to, for example, the size of the terminal block 100 in the vertical direction. In the terminal block 100, the number of the terminal block screws 101 arranged in the vertical direction is not limited to a specific number and can be set appropriately.

Further, the length of the cover 102 can be appropriately set according to the length of the terminal block 100 in the column direction of the terminal block screws 101a and 101b, and for example, 10 columns (constituted by the terminal block screws 101a and 101b). It is possible to set the length to cover about 10 sets) of terminal block screws 101. The length of the cover 102 is not limited to 10 rows, and may be 3 rows or 5 rows, and may be any length.

The terminal block screw 101a and the terminal block screw 101b, which are arranged adjacent to each other in the left-right (horizontal) direction, that is, the pair of terminal block screw 101a and the terminal block screw 101b are respectively screwed into the conductive plate 110. The conductive plate 110 is a member formed by molding a material having conductivity into a plate shape, and is made of, for example, a metal material. As a result, the terminal block screws 101a and 101b, which are arranged adjacent to each other in the left-right (horizontal) direction, are electrically connected via the conductive plate 110.

3, 4, 5, and 6 are explanatory views showing an alarm test terminal cover according to an embodiment of the present invention. In FIGS. 3, 4, 5, and 6, the alarm test terminal covers 300, 400, 500, 600 of the embodiment according to the present invention are similar to the cover 102 with respect to the terminal block 100. It can be attached detachably from the front side. The alarm test terminal covers 300, 400, 500, 600 can be formed using, for example, a resin such as acrylic. The alarm test terminal covers 300, 400, 500, 600 realize the terminal covers according to the present invention.

The dimension of the alarm test terminal covers 300, 400, 500, 600 is shorter than the dimension of the cover 102 in the direction parallel to the length direction of the terminal block 100. Specifically, for example, the cover 102 covers the terminal block screws 101 (101a, 101b) of about 10 rows, while the alarm test terminal cover has 2 to 5 rows of terminal block screws. It is preferable to cover 101 (101a, 101b).

The alarm test terminal covers 300, 400, 500, 600 are provided with notches cut out so that some of the terminal block screws 101 are exposed in the assembly direction (the length direction of the conductive plate 110) and the column direction. ing. The alarm test terminal covers 300, 400, 500, 600 are provided with notches to form a so-called “tooth loss” shape. The alarm test terminal covers 300, 400, 500, 600 can be formed in a plurality of patterns depending on the positions of the notches as shown in FIGS. 3, 4, 5, and 6.

In FIG. 3, the alarm test terminal cover 300 has a length that covers the terminal block screws 101 for three rows, and a notch is provided in the second row in the row of the terminal block screws 101a or 101b. The alarm test terminal cover 300 is shown. As a result, the alarm test terminal cover 300 has a substantially “U” shape when viewed from the front side.

In FIG. 4, the alarm test terminal cover 400 has a length that covers the terminal block screws 101 for five rows, and includes the second and fourth rows of the terminal block screw 101a or the terminal block screw 101b, and the terminals. The alarm test terminal cover 400 is shown in which notches are provided in the first, third, and fifth rows of the base screw 101b or the terminal base screw 101a. As a result, the alarm test terminal cover 400 has a substantially “W” shape when viewed from the front side. In the alarm test terminal cover 400 shown in FIG. 4, notches are provided alternately in the row of the terminal block screws 101a or 101b and the row of the terminal block screws 101b or the terminal block screws 101a.

In FIG. 5, the alarm test terminal cover 500 has a length that covers the terminal block screws 101 for three rows, and includes the second row of the terminal block screws 101a or 101b and the terminal block screws 101b or 101b. The alarm test terminal cover 500 is shown in which notches are provided in the first and third rows of the terminal block screw 101a. As a result, the alarm test terminal cover 500 has a substantially “Y” shape when viewed from the front side. Also in the alarm test terminal cover 500 shown in FIG. 5, as in the alarm test terminal cover 400 shown in FIG. 4, the terminal block screw 101a or the row of the terminal block screw 101b and the terminal block screw 101b or the terminal block screw 101a. Notches are provided alternately with the rows of.

In FIG. 6, the alarm test terminal cover 600 has a length that covers the terminal block screws 101 for two rows, and includes the first row of the terminal block screws 101a or 101b and the terminal block screws 101b or 101b. The second row in the row of the terminal block screws 101a and the alarm test terminal cover 600 provided with a notch are shown. As a result, the alarm test terminal cover has a substantially "Z" shape when viewed from the front side. In the alarm test terminal cover 600 shown in FIG. 6 as well as the alarm test terminal covers 400 and 500 shown in FIGS. 4 and 5, the terminal block screw 101a or the row of the terminal block screw 101b and the terminal block screw 101b. Alternatively, the notches are provided alternately with the row of the terminal block screws 101a.

In the alarm test, the cover 102 is removed or the position of the cover 102 is shifted so that the terminal block screw 101 to be tested is opened. In this state, the alarm test terminal covers 300, 400, 500, 600 are attached so that only the terminal block screws 101 to be tested are opened. The alarm test terminal covers 300, 400, 500 and 600 to be attached at this time are appropriately selected according to the position of the terminal block screw 101 to be tested. After that, the removed or displaced cover 102 has terminal block screws other than the part to which the alarm test terminal covers 300, 400, 500, 600 are attached after the alarm test terminal covers 300, 400, 500, 600 are attached. It may be reattached so that 101 is entirely covered.

As a result, all the terminal block screws 101 not involved in the alarm test can be covered with the alarm test terminal covers 300, 400, 500, 600 or the cover 102. In this way, all terminal block screws 101 that are not involved in the alarm test are cured, and the terminal block screws 101 that can be connected are limited. Form the alarm circuit of.

When attaching the alarm test terminal covers 300, 400, 500, 600 to the terminal block 100, the alarm test terminal covers 300, 400, 500, 600 are pressed against the terminal block 100 from the front side. On the other hand, when removing the alarm test terminal cover attached to the terminal block 100, the alarm test terminal covers 300, 400, 500, and 600 are bent from the side while being removed from the side by curling. As described above, the alarm test terminal covers 300, 400, 500, and 600 can be easily attached to and removed from the terminal block 100.

FIG. 7 is an explanatory view showing the alarm test terminal cover according to the embodiment of the present invention. The alarm test terminal cover according to the embodiment of the present invention can expose any terminal block screw 101 by appropriately providing a notch. It is assumed that the alarm test terminal cover having the alternate cutouts has a lower strength than the alarm test terminal cover.

Particularly, when there is no portion that covers the terminal block screws 101 on both sides in the assembling direction or the column direction, the strength thereof is assumed to be lower than that of the conventional cover 102. On the other hand, if the thickness of the alarm test terminal cover is increased or the strength thereof is increased, it may be difficult to attach and detach the cover.

In FIG. 7, the alarm test terminal cover 700 includes a reinforcing material 701. The reinforcing material 701 can be provided along the shape of the alarm test terminal cover 700. Alternatively, the reinforcing material 701 may be provided in a portion of the alarm test terminal cover 700 where the strength is assumed to be significantly reduced. The reinforcing material 701 can be realized by, for example, a metal wire-shaped member. Alternatively, the reinforcing member 701 may be realized by, for example, a resin called plastic or the like.

8 and 9 are explanatory views showing the alarm test terminal cover according to the embodiment of the present invention. The diagram on the left side of the paper surface in FIG. 9 shows a state in which the alarm test terminal cover shown in FIG. 8 is viewed from above the paper surface in FIG. The center view of the paper in FIG. 9 shows the alarm test terminal cover shown in FIG. 8 as viewed from the front of the paper in FIG. The diagram on the left side of the paper in FIG. 9 shows the state of the alarm test terminal cover shown in FIG. 8 as viewed from the left side of the paper in FIG.

8 and 9, the alarm test terminal cover 800 is provided with a notch that continuously opens a portion corresponding to the terminal block screws 101 adjacent in the column direction. Further, the alarm test terminal cover 800 includes a partition member 801 for preventing the fuse clips from accidentally coming into contact with both of the adjacent terminal block screws 101.

The partition member 801 is provided such that the rising dimension (height) from the terminal block 100 is longer than the length of the mouth portion of the fuse clip. As a result, even if the fuse clip is mistakenly moved over the adjacent terminal block screws 101 and brought close to the terminal block 100, the mouth of the fuse clip is caught by the partition plate and the tip of the fuse clip contacts the terminal block screw 101. Can be prevented.

The alarm test terminal covers 300, 400, 500, 600, 700, 800 may be colored. By coloring the alarm test terminal covers 300, 400, 500, 600, 700, 800, the operator can be alerted, which can contribute to further prevention of human error.

When the alarm test terminal covers 300, 400, 500, 600, 700, 800 are colored, the alarm test terminal cover is attached to the terminal block 100 by changing the color of the acrylic cover to a clear type. You can visually check the wiring number. This can also contribute to further prevention of human error.

According to the present invention described above, it is possible to prevent a short circuit due to the positive terminal and the negative terminal, and it is possible to reliably prevent the occurrence of a false alarm. Further, according to the present invention, it is possible to prevent the occurrence of a power failure due to a miss lip. Further, according to the present invention, since the curing tape conventionally discarded after the test is not used, it is possible to reduce waste. Further, according to the present invention, it is possible to prevent the terminal block screw 101 unrelated to the work from being exposed and prevent the electric shock of the worker.

INDUSTRIAL APPLICABILITY As described above, the terminal cover and the test method according to the present invention are useful for the terminal cover and the test method attached to the terminal block, and particularly, the terminal cover and the terminal cover attached to the terminal block provided with a large number of terminals and installed in a narrow space. Suitable for test method.

100 terminal block 101, 101a, 101b terminal block screw 102, 103 cover 300, 400, 500, 600, 700, 800 alarm test terminal cover

Claims (2)

A terminal cover detachably attached to a terminal block provided with a plurality of terminal block screws arranged in the assembly direction and the column direction,
A fixing portion in which the tip portions of the pair of opposite sides of the flat plate member are bent in the same direction so as to be fixed by hooking on the terminal block.
A notch cut out to expose a part of the terminal block screws of the plurality of terminal block screws,
Equipped with
A terminal cover , wherein the cutout has a width such that two consecutive rows of terminal block screws are exposed, and a partitioning member is provided near the widthwise center of the exposed portion of the cutout . The terminal block is detachably attached to a terminal block having a plurality of terminal block screws arranged in the assembling direction and the column direction, and is cut out so that some of the terminal block screws are exposed. A plurality of types of terminal covers in which the positions of the cutouts are different in the assembling direction and the column direction,
A terminal cover that is detachably attached to the terminal block and is not provided with the notch,
Of at least a part of the terminal cover, using a terminal cover having a fixing portion in which the tip portions of a pair of opposite sides of the plate-shaped member is bent in the same direction,
A test method characterized in that the fixing portion of the terminal cover is hooked and fixed to the terminal block, and the test is performed in a state in which a terminal block screw not involved in the test is covered among the plurality of terminal block screws. .

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