JP2019046569A - Terminal block - Google Patents

Abstract

To provide a terminal block capable of performing a test, an evaluation and the like, without loosening a screw terminal.SOLUTION: A terminal block 1 has a configuration where a plurality of screw terminals 20 are provided side by side to form a terminal row 2, in a terminal block body 10. Each screw terminal 20 having a conductive plate 21 and a screw part 22 is supported by each supporting part 14 of the terminal block body 10. A recessed portion 14e recessed inwardly from a side end face 21b of the conductive plate 21 is formed on at least one side face of the supporting part 14 in an orthogonal direction orthogonal to a terminal row direction. A contact portion 21c to contact a contact element of an inspection jig is provided on the side end face 21b.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a terminal block in which a plurality of screw terminals are provided side by side in a terminal row.

  Conventionally, for example, a power supply device, a power conversion device that converts power of the power supply device, various devices that receive power supply from the power supply device or the power conversion device, a switchboard in a power station, a control panel, etc. A terminal block provided with a terminal row consisting of a plurality of screw terminals is attached for branch connection.

  For example, at the time of shipment of these various devices, shipment tests such as confirmation of normal operation applying test power supply voltage via a terminal block, confirmation of output voltage value, output current value, etc. are performed, performance evaluation, etc. Has been done. Generally, for example, as disclosed in Patent Document 1, a test jig is mounted on a terminal block to perform a test, and after the test, the jig is removed and shipped. .

JP-A-9-139244

  However, since it is necessary to connect the wiring of the test power supply to the screw terminal or to remove the wiring after the test, there is a problem that the number of operation steps is increased. In addition, when connecting or removing the above test wiring, there is work to tighten or loosen the screw part of the screw terminal, and during this work, the screw hole of the screw part is crushed or the screw hole is clean There is a problem that it may occur that the fastening can not be performed with sufficient strength to maintain the

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a terminal block capable of performing a test or evaluation of the terminal block without loosening the screw portion of the screw terminal.

  In the first aspect of the present invention, in the terminal block main body, a plurality of screw terminals are provided side by side as a terminal row, the terminal block main body includes a plurality of supporting portions for supporting the respective screw terminals. And each of the screw terminals is a conductive plate supported by the support portion of the terminal block main body and having a screw hole penetrating therethrough, and a screw portion screwed into the screw hole of the conductive plate to sandwich the terminal. In each of the supporting portions, at least one of both side surfaces positioned in the orthogonal direction orthogonal to the terminal row direction is formed with a recessed portion which is recessed inward from the side end surface of the conductive plate, and the recessed portion in the conductive plate The side end face on the part side is characterized in that a contact part for bringing the contact of the inspection jig into contact is provided.

  By adopting such a configuration, it is possible to inspect the terminal block, for example, by using an inspection jig having a form in which the inspection is performed by being inserted in the orthogonal direction. That is, the terminal block can be inspected or evaluated without the operation of loosening or retightening the screw portion of the screw terminal.

  The width in the terminal row direction of each recess may be narrower than the width in the terminal row direction of the conductive plate.

  Thus, regardless of the depth of the recess in the orthogonal direction, it is possible to provide a support structure for supporting the conductive plate from the lower side on both outer sides in the terminal row direction of the recess.

  The recessed portion is formed on one side surface of each of the support portions, and a contactor and a pressing portion that contact the contact portion on the other side surface side of the support portion on the terminal block main body A receiving surface may be provided on which the pressing portion of the inspection jig sandwiching the terminal block from both sides in the orthogonal direction may be pressed.

  Thus, the sandwiching type inspection jig can be stably attached.

  In a second aspect of the present invention, in the terminal block main body, a plurality of screw terminals are provided side by side in a terminal row, wherein each screw terminal is supported by the terminal block main body and a screw hole passes through The conductive plate formed, and a screw portion screwed into the screw hole of the conductive plate to hold the terminal, and at least one side end surface of the conductive plate in the orthogonal direction orthogonal to the terminal row direction, A contact portion for bringing a contact of the inspection jig into contact is provided, and the terminal block main body is in contact with the contact portion of the contact when the contact is in contact with the contact portion. It is characterized in that a relief structure for escaping the non-contacting portion is provided.

  Thus, as in the first aspect, for example, the terminal block can be inspected using an inspection jig having a form in which the inspection is performed by being inserted in the orthogonal direction orthogonal to the terminal row direction.

  According to the present invention, it is possible to provide a terminal block capable of testing and evaluating the terminal block without loosening the screw portion of the screw terminal.

It is a front view which shows schematic structure of a terminal block. It is a top view which shows schematic structure of a terminal block. It is the enlarged plan view which expanded the area | region shown by III of FIG. It is an expansion perspective view which expanded and showed a part of terminal block typically. It is a front view which shows the state which attached the jig for inspection to the terminal block. It is a side view which shows the state which attached the jig for inspection to the terminal block. It is a side view which shows the state which mounted the jig | tool for another inspection to the terminal block.

  Hereinafter, embodiments of the present invention will be described in detail based on the drawings. The following description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its applications or its uses.

  FIG. 1 is a side view showing a schematic configuration of a terminal block according to the present embodiment, and FIG. 2 is a plan view thereof. In the present embodiment, a configuration example of the self-up type terminal block 1 is shown and specifically described.

  The terminal block 1 is attached as an input / output port to, for example, various devices (hereinafter simply referred to as devices etc.) such as an electric device such as a power conditioner such as a power conditioner, various power generation systems, and power supplies such as storage batteries. It is used for relay connection and branch connection of various wiring. Further, as described in the background art, the terminal block 1 is also used in power equipment, a switchboard in a power plant, a control panel, and the like.

  In addition, the attachment surface side (attachment direction back side) at the time of attaching the terminal block 1 to an apparatus etc. shall be called "lower", and the near side of an attachment direction shall be called "upper." That is, the mounting direction at the time of mounting the terminal block 1 to an apparatus, various devices, etc. is called "vertical direction".

  The terminal block 1 has a terminal block main body 10, and the terminal block main body 10 is provided with a terminal row 2 composed of a plurality of screw terminals 20. In the following description, the direction along the terminal row 2 (terminal row direction) is referred to as the “left-right direction”. Further, a direction perpendicular to the vertical direction and the lateral direction is referred to as "longitudinal direction", and a back plate side to be described later in the longitudinal direction is referred to as "rear", and the opposite side is referred to as "front". In other words, the front-rear direction corresponds to the orthogonal direction orthogonal to the terminal row direction.

  The terminal block main body 10 has a rectangular box-like base portion 11. A plurality of side plates 12 are erected on the base portion 11 at intervals corresponding to the width in the left-right direction of the screw terminals 20 between both ends in the left-right direction. The rear ends of the side plates 12 are flush with the rear ends of the base portion 11. The rear ends of the side plates 12 are connected by a back plate 13. Thereby, the terminal accommodation space R for accommodating each screw terminal 20 is divided by a pair of side plate 12 and the back plate 13 which adjoin each other. The base portion 11, the side plate 12 and the back plate 13 of the terminal block main body 10 are made of, for example, an insulating resin. Further, the upper ends of the plurality of side plates 12 are flush with each other, and a cover 15 (described by an imaginary line in FIGS. 1 and 2) is provided above the side plates 12 and the back plate 13 so as to cover the upper side of the terminal accommodation space R. Yes) is provided.

  Furthermore, a pair of screwing parts 16 for screwing and fixing the terminal block 1 to a device etc. is provided at the lower corner of the left and right ends of the base 11 from the left and right outer side surfaces of the corner. It projects integrally toward the outside of the direction. Further, on the lower end face 11 a of the base portion 11, at the positions corresponding to the screw terminals 20, electrode plates 17 of the same number as the number of screw terminals 20 are provided to project downward. The electrode plates 17 are electrically connected to the corresponding screw terminals 20 respectively.

  In each terminal accommodation space R of the terminal block main body 10, a support portion 14 for supporting the screw terminal 20 is provided at an intermediate height position in the vertical direction of the side plate 12. The screw terminal 20 is screwed into the screw hole (not shown) of the conductive plate 21 and the conductive plate 21 supported on the upper surface (hereinafter referred to as the support surface 14a) of the support portion 14 and the terminal of the external wiring (not shown) And a threaded portion 22 for sandwiching

  The conductive plate 21 is a conductive plate-like body, and the above-mentioned screw hole is formed to penetrate at the central portion thereof. Further, locking portions 25 for supporting the conductive plate 21 on the support portion 14 are formed by bending downward from both outer sides in the left-right direction at the four corners in the front and rear, right and left directions of the conductive plate 21 (see FIG. 3) Is provided.

  The screw portion 22 has a head portion 23a (see FIG. 6) in which a driver groove is formed at the upper center, and a male screw portion 23 constituted by a shaft portion 23b (see FIG. 6) extending downward from the lower surface of the head portion. And a washer 24 which is inserted into the shaft portion 23b of the male screw portion 23 and which sandwiches the terminal of the external wiring with the conductive plate 21 when the male screw portion 23 is screwed to the conductive plate 21. The washer 24 may be provided separately from the male screw 23 or may be integrally formed with the male screw 23. Further, the washer 24 may be omitted in the case where the external wiring terminal can be held by the male screw portion 23 alone.

  Each support portion 14 is integrally formed with the base portion 11 and the side plates 12 and the back plate 13 outside the terminal accommodation space R. Further, the height positions of the adjacent support portions 14 are aligned. Then, as shown in FIG. 6, each support portion 14 has a bottomed screw insertion portion 14b recessed downward from the support surface 14a at a position corresponding to the screw hole of the conductive plate 21. . The screw insertion portion 14 b is shaped, for example, so that the shaft portion 23 b of the male screw portion 23 can be screwed in, or the shaft portion 23 b can be inserted with play in the circumferential direction. Further, bottomed engaged portions 14c which are recessed downward from the support surface 14a are formed at four corners in the front-rear and left-right direction of the support portion 14 (see FIG. 3). The locking portion 25 of the conductive plate 21 is fitted into the locked portion 14c, and the movement of the conductive plate 21 in the front-rear and left-right directions is blocked. In each drawing of this embodiment, although the example which is constituted so that front end face 14d of support part 14 may become the back side rather than front end face 12a of side board 12, it is not limited to this. For example, the front end surface 14d of the support portion 14 and the front end surface 12a of the side plate 12 may be flush with each other.

  The front end surface 14d of the support portion 14 is formed with a recessed portion 14e that is recessed below the support surface 14a and inside the front end surface 21b of the conductive plate 21. The width in the left-right direction of the recess 14e is wider than the width in the left-right direction of the contactor 42 (contact piece 42c) of the clamp jig 4 as an inspection jig which will be described later with reference to FIGS. There is. Furthermore, in the state where the recessed portion 14e has the terminal base 1 sandwiched in the front-rear direction by the clamp jig 4, the height position of the lower surface of the recessed portion 14e is lower than the lower end of the contact piece portion 42c of the contactor 42. It is formed. Thereby, when the terminal block 1 is sandwiched in the front-rear direction by the clamp jig 4, the collision of the contact piece 42 c with the support 14 can be avoided, and the contact plate 42 is provided on the front end face 21 b of the conductive plate 21. The contact piece portion 42c can be made to abut on the contact portion 21c.

  Here, the front end face 21b of the conductive plate 21 corresponds to the side end face in the orthogonal direction (front-rear direction) orthogonal to the terminal row direction (left-right direction). Then, in the front end face 21b of the conductive plate 21, a portion corresponding to the recessed portion 14e, that is, a portion to which the contact piece portion 42c of the clamp jig 4 may abut is called an abutting portion 21c. Do. Furthermore, the recess 14e corresponds to a collision avoidance structure for avoiding that a contact 42 (contact piece 42c) of the clamp jig 4 described later collides with a portion other than the contact portion 21c of the terminal base 1. At the same time, in a state where the contact piece portion 42c abuts on the contact portion 21c, it corresponds to a relief structure for releasing a protrusion 42f provided on the contact piece portion 42c described later.

  5 and 6 show a state in which the clamp jig 4 as an inspection jig is attached to the terminal block 1, FIG. 5 is a front view, and FIG. 6 is a side view.

  The clamp jig 4 has a jig main body 41 in which an air cylinder (not shown) is incorporated, and is brought into contact with the contact portion 21c of the conductive plate 21 when the operating force from the air cylinder is released. The contactor 42 and the pressing portion 43 pressed against the rear surface of the back plate 13 sandwich the terminal block 1 from both sides in the front-rear direction to perform various inspections. Further, the clamp jig 4 is provided with a connection portion 44 for connecting the high voltage line cable 6 connected to a test power supply (not shown) for supplying an applied voltage required for the withstand voltage test.

  The pressing portion 43 has a function to be pressed in the case of the above-mentioned pinching and a positioning function of the terminal block 1 and the clamp jig 4. Specifically, the front lower corner of the pressing portion 43 is notched in a step-like shape in accordance with the shape of the rear upper corner of the terminal block 1. When attaching the clamp jig 4 to the terminal block 1, positioning can be performed by placing the rear upper corner portion of the terminal block 1 on the step portion. Furthermore, in this positioned state, the terminal block 1 is held in a state where the rear surface 13a (corresponding to the receiving surface) of the back plate 13 is pressed against the pressing portion 43, so that the terminal relative to the clamp jig 4 The platform 1 can be held stably.

  The contacts 42 are lever-type contacts formed in a substantially L-shape, and are arranged side by side in the left-right direction. Each contact 42 is attached and fixed to a support shaft 41 b extending in the left-right direction over the entire terminal block 1 at a position corresponding to the screw terminal 20 to be contacted. More specifically, in the mounted state (see the solid line in FIG. 6) in which the clamp jig 4 is mounted on the terminal block 1, each contact 42 extends downward from the fixing position to the support shaft 41b. A piece portion 42c and an operation piece portion 42b extending in a substantially L shape from the fixed position to the support shaft 41b toward the upper side and the rear side are provided.

  On the rear surface of the lower end portion of the contact piece portion 42c, at a height position lower than the lower surface of the conductive plate 21, there is formed a protrusion 42f which protrudes in a substantially triangular shape toward the rear side and extends over the entire left-right direction There is. As a result, when the terminal block 1 is sandwiched by the contact 42 and the pressing portion 43, the rear surface of the contact piece 42c abuts on the contact portion 21c of the conductive plate 21, and the protrusion 42f clamps it. It is possible to prevent the jig 4 from coming off in the upward direction. In other words, the recessed portion 14 e is recessed inward of the front end surface 21 b of the conductive plate 21, thereby realizing the retaining structure of the clamp jig 4.

  The actuating shaft 41a for pushing the upper surface of the actuating piece 42b downward in the left-right direction on the upper side at the middle position of the actuating piece 42b in the front-rear direction receives a downward actuating force by the air cylinder. It has been passed. Further, a spring attachment portion 42g for attaching a spring (not shown) for biasing the operation piece portion 42b upward is protruded from the lower surface of the rear end side of each operation piece portion 42b. The biasing force of the spring attached to the spring attachment portion 42g is not particularly limited, but is set to, for example, about 50 [N]. Thereby, the contactor 42 can be desorbed by the air cylinder. Specifically, in the steady state in which the actuating force of the air cylinder in the contact 42 is released, the action piece 42b becomes horizontal by the biasing force of the spring, and the rear end face of the contact piece 42c is in contact with the conductive plate 21. It is located in the mounting position (see the solid line in FIG. 6) that is in contact with the contact portion 21c. On the other hand, when the actuating force against the biasing force of the spring is applied from the air cylinder, the actuating piece portion 42b is pushed down and the contactor 42 is separated from the mounting position with the support shaft 41b as a fulcrum (see broken line in FIG. 6) Turn towards).

  As an inspection using the clamp jig 4, for example, an inspection of the contact resistance value, a temperature rise inspection when a predetermined power is applied, and the like are performed. The inspection method using the clamp jig 4 will be specifically described below.

  First, after connecting the high voltage cable 6 connected to the inspection power supply device (not shown) to the connection portion 44, the operator exerts the operating force of the air cylinder to turn the contact 42 from the mounting position to the disengaging position Let Thereafter, in a state where the contactor 42 is in the separated position, the terminal block 1 is pressed against the pressing portion 43 of the clamp jig 4 and positioned, thereby releasing the actuating force of the air cylinder. As a result, the contactor 42 rotates from the disengaging position to the mounting position, and the contact piece 42c abuts against the contact portion 21c of the conductive plate 21, ie, in the mounted state.

  In this mounted state, for example, in the inspection of the contact resistance value, the power supply device before energization to energize the terminal block 1 and the electrification in which a predetermined voltage is applied to the terminal block 1 through the high voltage cable 6 and the connection portion 44 The contact resistance of the connection portion 44 and the electrode plate 17 later is measured. Further, for example, in the temperature rise inspection, in the same manner as described above, a predetermined power is supplied from the test power supply device to the terminal block 1, and the temperature rise of the contact piece 42c is measured using a thermocouple or the like.

  When the necessary inspection is completed, the worker exerts the operating force of the air cylinder to turn the contactor 42 from the mounting position to the disengaging position, removes the clamp jig 4 from the terminal block 1, and ends the work. .

  As described above, according to the present embodiment, the front end surface 14d of the support portion 14 is provided with the recessed portion 14e which is recessed below the support surface 14a and inside the front end surface 21b of the conductive plate 21. The inspection can be performed by sandwiching the terminal block 1 in the front-rear direction using the clamp jig 4. That is, inspection and evaluation or the like of the terminal block 1 can be performed without the operation of loosening or retightening the screw portion 22 of the screw terminal 20. In addition, since there is no work for loosening or tightening the screw part 22, there is no possibility of crushing the screw hole of the screw part during work.

  For example, in the case of the terminal block 1 where the recessed portion 14e (collision avoidance structure) is not provided, even if the clamp jig 4 is sandwiched from the front and rear direction as in the present application, the support portion 14 becomes an obstacle. It is difficult to stably bring the jig 4 into contact with the conductive plate 21. In addition, when relatively large current for inspection is applied in such a state where stable contact is not made, black wrinkles adhere to screw terminal 20 due to discharge etc., and screw terminal 20 is discolored to make a product Although there may be a situation where it can not be shipped, this is not the case in the present application.

<Other Embodiments>
As mentioned above, although the preferable embodiment of the present invention and its modification were explained, the art concerning this indication is not limited to this, and application is possible also to the embodiment which changed suitably, substitution, etc. In addition, the components described in the above embodiments and the components described below can be combined to make a new embodiment.

  For example, in the above embodiment, although the protrusion 42 f for retaining is provided at the lower end portion of the contact piece 42 c, as shown in FIG. 7, the clamp jig 4 in which the protrusion is not provided. May be used. Even when such a clamp jig 4 is used, the mounting method and inspection method of the clamp jig 4 are the same as in the above embodiment, and the same effects can be obtained.

  Further, in the above embodiment, when the contact piece portion 42c of the contact 42 of the clamp jig 4 abuts on the contact portion 21c, the collision for avoiding the collision of the contact piece portion 42c other than the contact portion 21c An example in which the recess 14e is provided in the support portion 14 as the evasion structure and the relief structure for releasing the protrusion 42f provided on the contact piece 42c when the contact piece 42c is in contact with the contact part 21c has been described. . However, the collision avoidance structure / retraction structure is not limited to the form of the above embodiment, and may be another configuration having the respective functions described above.

  Moreover, although the example which has covered the circumference | surroundings of the axial part 23b by a part of support part 14 is shown in FIG. 1, it is not limited to this. Although the specific illustration is omitted, in FIG. 1, the depth in the front-rear direction of the recessed portion 14 e may be further deepened to expose the shaft portion 23 b of the male screw portion 23.

  Further, in the above embodiment, the conductive plate 21 is supported by the support surface 14 a of the support portion 14, but is not limited to this. For example, the conductive plate 21 may be supported using a position other than the support surface 14 a of the support portion 14 or a part of the side wall 12. More specifically, a protrusion or the like may be provided on the support portion 14 so as to protrude upward, and the conductive plate 21 may be supported by the protrusion. Further, the shape of the engaged portion 14c may be tapered downward, and the inner wall of the engaged portion 14c may support the engaging portion 25. In addition, as the conductive plate 21, a gradual reverse U-shaped one may be applied in a front view, and even in such a case, the conductive plate may be formed on the support surface 14 a or other portions based on the above description. 21 should be supported.

  Moreover, in said embodiment, although the pressing part 43 of the clamp jig 4 was pressed on the rear surface 13a of the back plate 13, it is not limited to this. For example, when the terminal row 2 is provided in two rows in parallel, etc., there is no back plate 13, so a receiving surface is formed on the rear surface (not shown) of the base portion 11, and the pressing portion 43 is pressed there You may be able to Further, the terminal block 1 may not be provided with a receiving surface. In this case, for example, a receiving surface may be provided on a part of the device to which the terminal block 1 is attached, and the pressing portion 43 may be pressed there.

  Moreover, in said embodiment, although the structure of the self-up-type terminal block was illustrated and demonstrated, the technique which concerns on this invention is applicable also to a screw-up-type terminal block. Specifically, also in the screw-up type terminal block, as in the configuration of FIG. 1, a recess is provided in the support portion that supports the conductive plate, and a collision avoidance structure (including a relief structure) with respect to the terminal block main body ) Should be provided.

  The present invention is useful as a terminal block in which a plurality of screw terminals are arranged side by side in a terminal row.

DESCRIPTION OF SYMBOLS 1 terminal block 10 terminal block main body 14 support part 14e recessed part 20 screw terminal 21 electrically conductive board 21c contact part 22 screw part

Claims (4)

A terminal block body in which a plurality of screw terminals are arranged side by side in a terminal row,
The terminal block body has a plurality of support portions for supporting the screw terminals,
Each of the screw terminals comprises a conductive plate supported by the support portion of the terminal block main body and having a screw hole penetrating therethrough, and a screw portion screwed into the screw hole of the conductive plate to sandwich the terminal.
In each of the support portions, at least one of both side surfaces positioned in the orthogonal direction orthogonal to the terminal row direction is formed with a recessed portion which is recessed inward of the side end surface of the conductive plate;
A terminal block characterized in that a contact end for bringing a contact of a testing jig into contact is provided on a side end surface of the conductive plate on the concave portion side. In the terminal block according to claim 1,
A terminal block characterized in that a width in a terminal row direction of each recessed portion is narrower than a width in a terminal row direction of the conductive plate. In the terminal block according to claim 1,
The recessed portion is formed on one side surface of each of the support portions,
In the terminal block main body, on the other side surface side of the support portion, pressing of the inspection jig which clamps the terminal block from both sides in the orthogonal direction by the contactor and the pressing portion which are in contact with the contact portion. A terminal block characterized in that a receiving surface on which a contact portion is pressed is provided. A terminal block body in which a plurality of screw terminals are arranged side by side in a terminal row,
Each of the screw terminals includes a conductive plate supported by the terminal block main body and having a screw hole penetrating therethrough, and a screw portion screwed into the screw hole of the conductive plate to sandwich the terminal.
At least one side end face in the orthogonal direction orthogonal to the terminal row direction of the conductive plate is provided with a contact portion for bringing a contact of a test jig into contact;
A terminal block characterized in that the terminal block main body is provided with a relief structure for releasing a portion which is not in contact with the contact portion of the contact when the contact member is in contact with the contact portion. .

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