JP2014027708A - Connection member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology for adding current detection means with a simple attachment work without exerting pressure on an existing space.SOLUTION: A connection member is used in a DC current supply cabinet in which power supply bars are arranged at prescribed intervals, and holds connectors for supplying DC power sources to load devices in the cabinet. A pair of arms is extended from one end of a substrate toward a connection section which formed as an electric path in the connection member, and inside the pair of the arms is used as a wiring inserting section the end of which is opened. Each of the arms in the pair is detachably provided with a current sensor having a structure where a magnetic sensor is arranged.

Description

  The present invention relates to a connection member used in a DC power supply cabinet capable of DC power supply to equipment inside the cabinet. Note that the DC power supply cabinet means a cabinet capable of DC power supply, and includes a cabinet in which AC power supply means similar to the conventional one is used together.

  As a DC power supply cabinet capable of DC power supply to equipment inside the cabinet, there is a structure in which a power bar covered with resin parts is arranged inside the cabinet as disclosed in Patent Document 1. The DC power supply cabinet disclosed in Patent Document 1 has a structure in which a power bar, an adapter, and the like are completely covered with resin parts and are detachable.

  However, in this DC power supply cabinet, when connecting members for supplying power to the load are connected, the protruding portion becomes large, and when a function for detecting the current flowing through each connecting member is added, the current is further passed through a new connecting member. There is a problem that it is necessary to connect the detection means, which is an obstacle to the effective use of the internal space of the cabinet.

  In addition, as a current detection means, for example, a technique of providing a core-shaped current sensor in a distribution board is disclosed (Patent Document 2). In order to attach the current sensor, the wiring is removed from the terminal portion. After that, there is a problem that it is necessary to attach the current sensor, and the attaching operation is difficult.

JP 2005-184993 A JP 2008-289301 A

  Therefore, the object of the present invention is to solve the above-described conventional problems, and even when a current detection function is added to a connection member that holds a connector for supplying DC power to an electronic device in a DC power supply cabinet, a new connection is added. There is no need to connect the current detection means via a member, the internal space of the cabinet can be used effectively, and the current detection means that is attached when the current detection function is added can be easily attached. It is to provide a connecting member that can.

The connection member of the present invention made to solve the above problems is used in a DC power supply cabinet in which power supply bars for DC power supply are arranged at a predetermined interval, and a connector for supplying DC power to load equipment in the cabinet. A connecting member to hold,
A pair of arm portions project from one end of the substrate to the connection portion formed as an electric path in the connection member, and the inside is a wiring insertion portion with the end portions open, and a magnetic detection element is provided in each of the pair of arm portions. A current sensor having a structure in which is disposed is detachably held.

  According to a second aspect of the present invention, in the connection member according to the first aspect, the connection portion is formed of a bar-shaped connection terminal or electric wire, and a current sensor holding portion for holding a current sensor is formed in the connection portion. It is characterized by this.

  According to a third aspect of the present invention, in the connecting member according to the first aspect, the connecting member has a case portion for holding a connector for supplying a DC power to a load device in the cabinet, and the case portion includes a current portion. A current sensor holding portion for holding the sensor is formed.

  According to a fourth aspect of the present invention, in the connecting member according to the first aspect, a fuse unit comprising a fuse element and a holding member for holding the fuse element is installed in the connecting member, and the current sensor holds the current sensor in the fuse unit. The holding portion is formed.

  According to a fifth aspect of the present invention, in the connection member according to the first aspect, the current sensor is mounted at a position where the center line in the thickness direction of the connection portion and the center line between the arm portions of the current sensor are substantially the same. It is characterized by holding.

  The connecting member for the DC power supply cabinet of the present invention connects the connector to the exposed portion of the negative power supply bar and the positive power supply bar by the positive electrode terminal and the negative electrode terminal, and supplies DC power to a load device such as a server inside the cabinet. Is something that can be done. The connecting member for a DC power supply cabinet of the present invention is connected to a connecting portion made of a bar-shaped connecting terminal or an electric wire serving as an electric path of a connecting member for holding a connector for supplying DC power to a load device in the cabinet, from one end of the substrate. A pair of arm portions can be protruded and the inside thereof can be used as a wiring insertion portion having an open end portion, and a current sensor having a structure in which a magnetic detection element is disposed in each of the pair of arm portions can be detachably held. Therefore, even when a current detection function is added to each connection member, it is not necessary to connect a current detection means via a new connection member, and the internal space of the cabinet can be effectively used, and the current sensor Can be easily attached.

  Further, as in the invention described in claim 2, a bar-shaped connection terminal or electric wire, a case portion of the connection member as in invention of claim 3, and a fuse in the connection member as in invention of claim 4 By forming a current sensor holding part for holding a current sensor in a fuse unit composed of a holding member for holding an element and a fuse element, the current of the connecting part can be measured simply by inserting the current sensor at a predetermined position. Further, it is possible to prevent occurrence of an error in current measurement due to backlash of the current sensor.

  As in the fifth aspect of the present invention, an error in current measurement is performed so that the current sensor is held at a position where the center line of the thickness of the connecting portion and the center line between the arm portions of the current sensor are substantially the same. Can be prevented.

It is a perspective view explaining the structure of a DC power supply cabinet. It is an expansion perspective view which shows the state of a connector. It is an expansion perspective view from the A direction of FIG. It is a horizontal sectional view in a position without a connector. It is a horizontal sectional view in a certain position of a connector. It is a perspective view of the connection member of an embodiment. It is a perspective view of the back surface of a connection member. It is a perspective view of a connection member. It is a perspective view of a connection member. It is a perspective view of a current sensor. It is a figure explaining the flow of the electric current detection by a current sensor. It is a vertical sectional view of the current sensor held by the connecting member. It is a perspective view explaining another embodiment of a current sensor holding part. It is a perspective view explaining another embodiment of a current sensor holding part. It is a perspective view of the structure made to hold | maintain to a current sensor holding part in the state which attached the cover to the current sensor. It is a perspective view of the state where the current sensor was held in the current sensor holding part. It is a perspective view explaining another embodiment of a connection member. It is a perspective view explaining another embodiment of a connection member.

Embodiments of the present invention will be described below.
FIG. 1 is a perspective view for explaining the structure of a DC power supply cabinet in which a connecting member of the present invention is incorporated. 1 is a vertical frame, 2 is a horizontal frame, and 3 is a depth frame. The skeleton structure of the cabinet is formed by these 12 frames. Reference numeral 4 denotes a mounting rail arranged in parallel in the vicinity of the inside of each vertical frame 1, which has a large number of device mounting holes so that various devices can be mounted at various heights. A cover 10 is attached between the vertical frame 1 and the mounting rail 4.

  The cabinet of this embodiment is for housing a server or the like. In order to supply DC power to a load device such as a server, the cabinet is vertically arranged between the left and right mounting rails 4 and side plates in FIG. Extending power bars (a negative power bar 6 and a positive power bar 9 described later) are arranged. The front side of FIG. 1 is the back side of the cabinet. The reason why the power bar is arranged in the rear portion of the cabinet is that it is easy to supply DC power to the power plug connected to the back surface of the load device such as a server. However, the position of the power bar is not necessarily limited to this embodiment, and may be on the front side. Reference numeral 5 denotes a DC power supply unit disposed at the bottom of the cabinet. The DC power supply unit 5 may be attached to the mount rail 4, and the attachment position is preferably near the bottom, but is not particularly limited.

  2 is a perspective view of the main part, FIG. 3 is a perspective view from the direction A of FIG. 2, and FIGS. 4 and 5 are horizontal sectional views of the portion shown in FIG. As shown in these drawings, a negative power supply bar 6 is vertically supported by a support member 7 inside the vertical frame 1. Further, in parallel with the negative power supply bar 6, positive power supply bars 9 are supported in a laminated manner at predetermined intervals via a cylindrical insulating member 8 called a cleat. A lower end portion of the power bar 6 constituted by the negative power bar 6 and the positive power bar 9 is connected to the DC power unit 5. The stacking direction of the power bars 6 is preferably the depth direction of the cabinet. Here, as shown in FIG. 3, the connecting member 13 for the DC power supply cabinet of the present invention refers to these negative electrodes via connecting terminals (a positive terminal 16 and a negative terminal 15 described later) provided in the connecting member 13. The connector 12 is connected to the exposed portions of the power supply bar 6 and the positive power supply bar 9 to supply DC power to a load device such as a server inside the cabinet.

  In this embodiment, the negative power bar 6 is on the outside and the positive power bar 9 is on the inside. With such an arrangement, it is possible to secure an insulation distance between the positive power supply bar 9 and the side plate of the cabinet. The negative power supply bar 6 can be fixed to the mount rail 4, and is not necessarily supported by the vertical frame 1. A part of the positive power bar 9 is covered with a protective cover 26.

  Thus, since the negative power supply bar 6 is arranged outside the positive power supply bar 9 in the width direction, the space 11 is formed on the side of the negative power supply bar 6. In the present embodiment, a space 11 is formed between the inside of the negative power supply bar 6 and the cover 10 as shown in FIG. As shown in FIGS. 3 and 5, the connection member 13 is disposed in the space portion 11. This connection member 13 is for connecting to a load such as a server to perform DC power supply, and is provided in a large number at a predetermined pitch in the vertical direction. It is preferable that a part of the connection member 13 is located in the space portion 11. The cover 10 is a plate disposed between the vertical frame 1 and the mount rail 4 and has an opening that exposes the insertion portion 17 on the front surface of the connector 12.

  As shown in FIG. 5, in the present invention, the connecting member 13 holds the connector 12 connected to the power plug drawn from the load device by the case portion 14, and by fixing the case portion 14 to the power bar, It is supported at a predetermined position. However, the fixing method of the case portion 14 is not limited to this embodiment, and the case portion 14 may be fixed to the vertical frame 1, the mounting rail 4, the cover 10, or the like provided as a frame member in the cabinet. Further, the fixing means is not limited to the screw, and a locking claw or the like can be used. Further, the connection member 13 may be composed of only the connector 12 and connection terminals described later (a positive electrode terminal 16 and a negative electrode terminal 15 described later).

  6 is an enlarged perspective view of the connection member 13 according to the embodiment of the present invention, and FIG. 7 is a rear perspective view. As shown in these drawings, the case portion 14 of the connecting member 13 is bent in a substantially crank shape, the connector 12 is disposed on one side thereof, and the negative terminal 15 and the positive terminal 16 are disposed on the opposite side. ing. The connector 12 arranged on one side is joined to bar-like connection terminals (positive terminal 16 and negative terminal 15) which are connection parts formed by projecting the connection pins 21 to the opposite side. The connector 12 has a substantially rectangular parallelepiped shape and is held by the case portion 14 of the connection member 13. The plug 17 at the tip of the connector 12 faces the end of the connection member 13 and is connected to a power plug of the load device. The rear end of the connector 12 is held in the recess 18 of the case portion 14.

  As shown in FIG. 6, a U-shaped protective member 19 is provided at the tip of the connector 12. The upper and lower ends of the protective member 19 are held by upper and lower ribs 20 protruding from the case portion 14. The protective member 19 protects the tip of the connector 12 and stably holds the connector 12 in the case portion 14 against the external force acting on the connector 12 when the power plug of the load device is inserted or removed. have. The rib 20 stably holds the connector 12 against an external force in the vertical direction. In addition, it is preferable to form a protrusion (not shown) on the surface of the case portion 14 where the connector 12 is installed so as to reduce the influence of an external force acting in the insertion / removal direction. With these structures, it is possible to avoid an external force from acting on the joint portion (connecting pin 21) between the connector 12, the negative electrode terminal 15, and the positive electrode terminal 16 when the power plug is inserted and removed.

  Two bar-shaped connection terminals (a negative terminal 15 and a positive terminal 16) are fixed to the opposite side of the connection member 13. In this embodiment, the negative terminal 15 has a crank shape, and the positive terminal 16 has a substantially U shape. As shown in FIG. 8, the negative terminal 15 and the positive terminal 16 are connected and fixed to the exposed portions of the negative power bar 6 and the positive power bar 9 by screws 22, respectively. In the present embodiment, the bar-shaped connection terminals (the negative electrode terminal 15 and the positive electrode terminal 16) have been described as the connection portions serving as the electric circuit. However, it is also possible to use electric wires as the connection portions.

  As shown in FIGS. 8 to 9, it is preferable that a capacitor 25 is disposed between the positive terminal 16 and the negative terminal 15 of the connection member 13 so that the connection member can be replaced as necessary. The capacitor 25 is effective to prevent the voltage of the power supply bar from fluctuating temporarily due to the load fluctuation of the server or the like and the voltage supplied to other loads from fluctuating.

  In this embodiment, a capacitor 25 is connected between the negative electrode terminal 15 and the positive electrode terminal 16 of the connecting member 13 so as to straddle the partition wall 23 and is disposed in parallel with the negative electrode terminal 15 and the positive electrode terminal 16. Accordingly, the entire connection member 13 can be replaced.

  The connecting member 13 of the present invention includes a current sensor holding portion 28 that can hold the current sensor 27 in a detachable manner as necessary. In addition, in the current sensor holding portion 28, a method of detachably holding the connecting portion made of a connection terminal, an electric wire, etc., a method of integrally forming the case portion 14, or the current sensor holding portion 28 as shown in FIG. A locking means 60 that can be locked to the locking portion 50 of the case portion 14 is formed, and may be detachably attached to the one-touch. Further, a hole for the current sensor holding part 28 for locking the current sensor 27 may be formed in the case part 14 itself. In any embodiment, the current sensor 27 is attached so as to straddle the connecting portion formed in the connecting member 13.

  As shown in FIG. 10, the current sensor 27 has a substantially U-shaped structure in which one end of a substrate 29 is opened to form a pair of arm portions 30, and a magnetic detection element 31 is mounted on the pair of arm portions 30. Yes. Further, a portion formed by opening one end of the substrate 29 is used as a wiring insertion portion 30a through which the wiring is inserted. The magnetic detection element 31 detects a magnetic field generated by a current flowing through a connection terminal (in the present embodiment, the positive electrode terminal 16) formed in the wiring insertion portion 30a. The magnetic detection element 31 is provided on the substrate 29. An integrated circuit 32 that processes the detected output and calculates the value of the current flowing through the connection terminal is also mounted. In this embodiment, one magnetic detection element 31 is mounted on each arm 30, but a plurality of magnetic detection elements 31 may be mounted. By mounting a plurality, it is possible to more accurately investigate the current flowing through the connection terminal (positive electrode terminal 16). Further, in the present embodiment, the substrate-like current sensor 1 is formed so as to be exposed. However, as shown in FIG. 15, the current sensor holding portion is covered with the current sensor 1 covered with a cover 70 made of an insulating material. 28 may be held.

  According to the present invention, as described above, the connection member 13 includes the current sensor holding portion 28, and the current sensor holding portion 28 can hold the compact substrate-like current sensor 27. Even in the case of adding a function of detecting the current flowing through 13, it is not necessary to connect a current detecting means via a new connecting member 13, and the internal space of the cabinet can be effectively used. In the present embodiment, a structure is adopted in which the current sensor 27 can be inserted into the current sensor holding portion 28 with the side plate of the cabinet removed, and the current sensor 27 is viewed from the opening direction of the front door and the rear door. Are arranged so that they cannot be seen.

  As illustrated in FIGS. 6 to 9, the current sensor holding unit 28 is disposed at a position where the positive electrode terminal 16 serving as a connection unit is sandwiched.

  The current sensor holding portion 28 of this embodiment includes hollow arm portion locking means, and a pair of arm portions of the current sensor 27 is inserted into the hollow portion from a direction perpendicular to the direction of current flow. It locks. As described above, as shown in FIG. 16, the current sensor 27 can be easily attached by inserting the pair of arm portions of the current sensor into the hollow arm portion locking means and locking them. Even when various wiring and connection operations in the cabinet are completed, the current detection function can be added to the connection member 16 by a simple operation as necessary. In addition, the current sensor holding unit 28 in the present embodiment is configured to lock only the arm 30 of the current sensor 27, but the current sensor 27 is covered by the current sensor holding unit 28 as shown in FIG. A structure may be used as long as at least the arm 30 is held so as to straddle the positive electrode terminal 16.

  In a state where the current sensor 27 is held by the current sensor holding portion 28, the magnetic detection element 31 mounted on the arm portion 30 of the current sensor 27 is fixed at a position sandwiching the positive electrode terminal 16. In this state, when a current flows through the positive electrode terminal 16, as shown in FIG. 11, a magnetic field due to the current is generated, the magnetic field is detected by the magnetic detection element 31 (Hall element), and a voltage having a value corresponding to the magnetic flux density is generated. Output from the Hall element. This voltage is amplified by an arithmetic circuit in the integrated circuit, and the amplified Hall element outputs are combined to obtain a current from the output voltage.

  If the positional relationship between the positive electrode terminal 16 and the magnetic detection element 31 is deviated, the current detection error is affected. Therefore, the current sensor 1 is disposed by the current sensor holding unit 28 so as not to cause backlash.

  In the present embodiment, as shown in FIG. 12, the current sensor holding portion 28 is located at a position where the center line of the plate thickness of the positive electrode terminal 16 and the center line between the arm portions 30 of the current sensor 27 are substantially the same. The current sensor 27 is formed to be locked without rattling. By arranging in this way, it is possible to prevent the occurrence of errors in current measurement due to backlash.

  In the above embodiment, the current sensor holding portion 28 is disposed at a position where the positive terminal 16 is sandwiched among the connection terminals (the positive terminal 16 and the negative terminal 15). The sensor holding part 28 can also be arranged.

  As another embodiment, as shown in FIGS. 17 and 18, a fuse unit 80 that prevents power supply to a load device when a short-circuit current is generated in the cabinet may be installed in the connection member 13. The fuse unit 80 includes a fuse element 82 and a holding member that holds the fuse element 82. In this embodiment, a fuse unit 80 is detachably installed between the positive power supply bar 9 and the positive terminal 16 of the connection terminal on the connection member 13. Specifically, the fuse element 82 is formed with two bar connection lines 81 serving as connection portions, one is connected to the positive terminal 16 and the other is connected to the positive power supply bar 9 with screws 22. It is what.

  In the present embodiment, the current sensor 27 is installed across the bar connection line 81 serving as a connection portion instead of the positive terminal 16 of the connection member 13. The current sensor 27 is held by the case 83 serving as a holding member for the fuse element 82 of the fuse unit 80 or the case 14 of the connecting member 13, and can measure the value of the current flowing through the bar connecting line 81. It is possible. Note that each server can be protected by forming a plurality of connecting members 13 that form the fuse unit 80 formed in the cabinet in this embodiment. In addition, since the fuse element 82 of the fuse unit 80 is formed in the same direction as the plug insertion direction of the connector 12, inspection and replacement such as confirmation can be easily performed.

  In the present embodiment, the current sensor holding portion 28 is hollow, but the means for holding the current sensor 27 is not limited to this, and the current sensor is formed by forming a locking projection or the like. 27, and at least the center line of the plate thickness of the positive electrode terminal 16 and the center line between the arm portions 30 of the current sensor 27 are at substantially the same position, and the current sensor 27 is locked without rattling. Anything that can be done.

  Although it is necessary to supply power to the current sensor 27, in the present embodiment, as shown in FIG. 12, the current sensor holding unit 28 includes a power supply unit 33 to the current sensor 27. It is not necessary to separately provide a means for supplying power to the current sensor 27 and perform wiring work, etc., and the current detection function can be added to the connecting member 13 only by inserting the current sensor 27. Of the power supply units 33 shown in FIGS. 7 and 12, one directly supplies power from the positive terminal 16 provided with the current sensor holding unit 28, and the other forms a power line and the like and supplies power from the negative terminal 15. And has a function of supplying power to the current sensor 27. The current sensor 27 supplies power from the power supply unit 33, and a power supply unit including a rectification unit for rectification / conversion is formed in a capacity suitable for the power supply of the current sensor 27. desirable.

  The means for supplying current to the current sensor 27 is not limited to the above embodiment. For example, power is directly supplied from the power bar, or a dedicated power supply bar different from the power bar is formed to supply power. Supply can also be made.

DESCRIPTION OF SYMBOLS 1 Vertical frame 2 Horizontal frame 3 Depth frame 4 Mount rail 5 DC power supply unit 6 Negative power supply bar 7 Support member 8 Insulation member 9 Positive power supply bar 10 Cover 11 Space part 12 Connector 13 Connection member 14 Case part 15 Negative electrode terminal 16 Positive electrode Terminal 17 Insertion part 18 Recess 19 Protection member 20 Rib 21 Connection pin 22 Screw 23 Bulkhead 24 Fixing part 25 Capacitor 26 Protective cover 27 Current sensor 28 Current sensor holding part 29 Substrate 30 Arm part 30a Wiring insertion part 31 Magnetic detection element 32 Integration Circuit 33 Power supply part 50 Locking part 60 Locking means 70 Cover 80 Fuse unit 81 Bar connection line 82 Fuse element 83 Case part

Claims (5)

It is used in a DC power supply cabinet in which power supply bars for DC power supply are arranged at predetermined intervals, and is a connecting member that holds a connector for supplying DC power to load equipment in the cabinet,
A pair of arm portions project from one end of the substrate to the connection portion formed as an electric path in the connection member, and the inside is a wiring insertion portion with the end portions open, and a magnetic detection element is provided in each of the pair of arm portions. A connection member characterized in that a current sensor having a structure in which a slab is disposed is detachably held. The connection part is composed of a bar-shaped connection terminal or an electric wire,
The connection member according to claim 1, wherein a current sensor holding portion for holding a current sensor is formed in the connection portion. The connection member has a case portion that holds a connector that supplies DC power to a load device in the cabinet,
The connection member according to claim 1, wherein a current sensor holding portion for holding a current sensor is formed in the case portion. A fuse unit consisting of a fuse element and a holding member for holding the fuse element is installed in the connection member,
The connection member according to claim 1, wherein a current sensor holding portion for holding a current sensor is formed in the fuse unit.   The connection member according to claim 1, wherein the current sensor is held at a position where the center line in the thickness direction of the connection portion and the center line between the arm portions of the current sensor are substantially the same.