JP5556312B2 - Detachable jig - Google Patents

Description

  The present invention relates to a detachable jig that allows a temporary power supply device to be connected to and detached from a terminal to which a load is connected.

Conventionally, the temporary power supply is connected in parallel to the existing power supply device by, for example, cutting the power cable cable connected to the load from the existing power supply device with a cutter knife or the like, exposing the conductive portion, and similarly exposing the temporary power supply The tip of the power cable from the device was connected.
However, in the above-described method, a current flows through the power cable, and there is a problem that a great danger is involved such as using a blade to cut off the coating.
Therefore, the conductive contact is crimped to the power-side cable terminal or the load-side cable terminal fastened to the conductive portion by a bolt by the movement of the electromagnetic contact by electromagnetic force, and the DC contact from the DC power source is supplied to the conductive contact. There has been proposed a temporary power supply connection device that is supplied to a power supply side cable terminal or a load side cable terminal via a cable (see, for example, Patent Document 1).

JP 2007-66780 A (paragraph [0005] and FIGS. 5 and 6)

However, when a conductive contact is crimped to a load-side cable terminal or the like as described in Patent Document 1 and DC power from a DC power supply is supplied to the power-side cable terminal or the load-side cable terminal via the conductive contact, Problems can arise.
For load-side cable terminals that are fastened to the conductive parts by bolts, there is a very small area for crimping the conductive contacts, resulting in incomplete connection and the difficulty of holding the crimped conductive contacts themselves Can be considered.

  In view of the circumstances as described above, an object of the present invention is to provide a detachable jig capable of connecting and removing a temporary power supply device to a terminal reliably and stably.

In order to achieve the above object, a detachable jig according to one embodiment of the present invention includes a magnetic part and a main body part.
The detachable jig allows the temporary power supply device to be connected to and detached from a terminal to which a load crimp terminal is connected.
The terminal includes a terminal member and a screw, and the screw includes a head and a foot having a smaller diameter than the head and passing through the terminal member, and the terminal is between the head and the terminal member. The crimp terminal is crimped to the terminal member so as to sandwich the crimp terminal.
The magnetic part has a concave shape that covers the head, and the concave shape can be fitted to the head by magnetic force.
The main body unit conducts the magnetic unit and the temporary power supply device.
The attachment / detachment jig electrically connects the head and the temporary power supply device by fitting the magnetic part to the head.

  Here, the terminal to which the load crimp terminal is connected is placed on a load cable crimp terminal, which will be described later, on a terminal member arranged on the substrate surface, and the screw foot is passed through the crimp terminal and the terminal member from above. By screwing to the substrate, the crimp terminal of the load cable is crimped to the terminal member. For example, it is assumed that the terminal has first to fourth terminals, a crimp terminal of a load cable is connected to the first and second terminals, and an existing power supply device is connected to the third and fourth terminals. At this time, if the first terminal and the third terminal are electrically connected to each other by the terminal members, and the second terminal and the fourth terminal are the same, the load includes the first to fourth terminals. The current from the existing power supply device flows through the. It is assumed that the first to fourth terminals are provided, and the load and the existing power supply device are connected to the first to fourth terminals. Of course, there may be a plurality of combinations, such as the first and second terminals. A plurality of terminals may be arranged on the load side, and a plurality of terminals including the third and fourth terminals may be arranged on the existing power supply side so as to face the terminals.

  The magnetic part covers the head of the screw by its concave shape, and is fitted to the head by its shape and magnetic force to enable stable connection. For example, if the screw head has a hemispherical shape, it is desirable that the screw has a concave shape that is recessed in a hemispherical shape so that the head closely contacts the head by magnetic force. Thereby, the magnetic part having the concave shape can be fitted to the head of the screw. Further, if the head has a polygonal column shape, the concave shape is preferably a concave shape that is recessed in the polygonal column shape. Note that the magnetic part is of course a magnetic material, but it must also be conductive. The screw is also magnetic and needs to be conductive.

  Further, it is considered that the portion of the crimping terminal with which the head is in direct contact can be most stably conducted by crimping the crimping terminal to the terminal member under the screw head. Therefore, it is particularly necessary in the case where a plurality of terminals are provided to enlarge the head as much as possible and to reduce the portion of the crimp terminal that is not in contact with the head. On the other hand, in order to connect stably by magnetic force, it is necessary to enlarge the contact area as much as possible, but as described above, the area where the screw head is wider than the area where the crimp terminal of the load cable protrudes from the screw have. Therefore, the head of the screw can be more stably connected by magnetic force than the crimp terminal protruding from the screw. From the above, a more stable connection is ensured by fitting the magnetic part to the head of the screw, which is a fastening member, instead of the crimp terminal itself of the load cable.

  The main body includes, for example, a thicker holding part so that it can be easily grasped by an operator, a connecting part that connects the holding part and the magnetic part narrower than that, a magnetic part and a temporary power supply device that pass through the holding part and the connecting part. A conducting member for conducting the current. As a result, since the current from the temporary power supply device passes through the conducting member and flows to the magnetic part, the holding part and the like can be formed of the insulating material, and the work can be performed safely.

  Therefore, in the attachment / detachment jig, the current from the temporary power supply device flows through the conducting member of the main body portion to reach the magnetic portion, and the magnetic power portion is fitted to the head of the screw, whereby the temporary power supply device extends from the magnetic portion to the screw head. This current further flows.

  Accordingly, for example, as described above, it is assumed that the crimp terminal of the load cable is connected to the first and second terminals, and the existing power supply device is connected to the third and fourth terminals. At this time, if the magnetic parts of the attachment / detachment jig to which the temporary power supply device is connected are fitted one by one to the heads of the screws of the first and second terminals, the existing power supply device can be replaced with a new power source without interruption. It is possible to replace it with a device. Further, since the temporary power supply device is connected to the first terminal and the second terminal, it does not interfere with the removal of the existing power supply device connected to the third terminal and the fourth terminal.

  The head portion may have a groove on the side surface opposite to the foot portion, and the magnetic portion may have a protrusion that fits in the groove in the concave shape.

  For example, if the screw is a pan screw with a cross hole, a groove for forming a cross hole is provided in the hemispherical head so that the screw can be turned with a screwdriver. Therefore, the magnetic part can be more securely fitted by providing the cross-shaped protrusion that just fits in the groove in a concave shape that covers the head part of the magnetic part. In particular, in the case of a hemispherical head, if a large external force is applied to the attachment / detachment jig with only the magnetic force, the attachment / detachment jig may come off because the magnetic force of the magnetic part loses the external force and slides on the head surface. There is sex. On the other hand, when the magnetic part has a protrusion that fits into the groove, the protrusion is caught in the groove to generate a reaction force, so that the slip can be stopped, and the temporary power supply device is more reliably connected to the terminal. be able to.

  Note that the projection does not necessarily fit into the entire groove on the head. For example, in the case of a cross-shaped groove, one of the intersecting linear protrusions may be a straight protrusion, or the cross-shaped groove There may be four projections fitted near each end of the. Thereby, for example, if it is one linear protrusion, it can respond also to a minus screw, and if it is four protrusions, it will be able to fit firmly in a cross-shaped groove of a slightly different size without slipping.

  The magnetic part may be held on the main body so as to be replaceable in accordance with the shape of the head.

  As described above, there are a plurality of types of screw heads, such as hemispherical or polygonal heads, plus screws (cross-headed pan head screws), and minus screws. Therefore, in order to securely fit the magnetic part of the attachment / detachment jig to the head, it is usually necessary to have a plurality of shapes. The attachment / detachment jig is divided into a main body part and a magnetic part, and the magnetic part is attached to and detached from the main body part. It can be exchanged according to the shape of the screw as possible. As a result, it is possible to reduce costs and improve workability without having to prepare different attachment / detachment jigs for each shape of the screw head.

  The load may include a load cable including the crimp terminal, and the main body may include a fixing band that is fixed to the load cable.

  The load is composed of a DC load itself such as a circuit and a load cable connected to the DC load, and a crimp terminal of the load cable is connected to the terminal. For example, a band-shaped fixing band is provided on the main body of the detachable jig, and the fixed band is wound around or tied to a load cable connected to a screw on which the magnetic part of the detachable jig is fitted. Fix the detachable jig.

  As a result, it is possible to prevent the attachment / detachment jig from coming off during power supply even if the screw is not properly fitted or any unexpected external force is applied, power failure of the load, short circuit to another circuit, etc. Can be prevented from occurring.

  The magnetic portion may have a depth of the concave recess that is smaller than a height of the head.

  For example, if the head of the screw is hemispherical and the magnetic part has a concave shape that is exactly the same depth as the height of the hemispherical, the concave part of the magnetic part may be caused by manufacturing errors or screw screwing. In some cases, the depth of the shape is slightly larger than the height of the head. In this case, when the magnetic part is put on the head, the magnetic part may come into contact with the surface of the crimp terminal to be crimped, and the magnetic part may be insufficiently fitted to the head.

  Therefore, for example, if the concave part depth of the magnetic part is formed smaller than the height of the screw head, even if the concave part depth slightly increases due to manufacturing errors or screw screwing, The possibility of contact with the surface of a certain crimp terminal can be reduced, and the magnetic part can be more securely attached to the screw.

  As described above, in the present invention, the temporary power supply device can be reliably and stably connected to the terminal and removed.

It is a block diagram which shows the direct-current power supply device replacement system which concerns on one Embodiment of this invention. It is a schematic perspective view which shows the state by which the load cable and the power cable were connected to each terminal. FIG. 3 is a partial cross-sectional view of FIG. 2. (A) is a schematic perspective view of the state which connected the power cable to the attachment / detachment jig, (b) is a schematic perspective view of the state which removed the magnetic part from the main-body part. It is a schematic sectional drawing of the state which the attachment / detachment jig fitted to the 1st terminal or the 2nd terminal. It is a flowchart of the method of replacing | exchanging a 1st DC power supply device to a 3rd DC power supply device uninterruptibly using an attachment / detachment jig. It is a block diagram which shows the state before replacing a 1st DC power supply device. It is a block diagram of the state which connected the attachment / detachment jig connected to the minus side of the 2nd power supply part to the 2nd terminal. It is a block diagram in the state where the detachable jig connected to the plus side of the second power supply unit and the detachable jig connected to the minus side are connected to the first and second terminals. It is a schematic perspective view of the state which connected the attachment / detachment jig connected to the plus side of the 2nd power supply part to the 1st, 2nd terminal, and the attachment / detachment jig connected to the minus side. It is a block diagram of the state which switched off the 1st direct-current power supply device. It is a block diagram of the state where the 1st direct-current power supply device was removed. It is a block diagram of the state which connected the 3rd DC power unit to the 3rd and 4th terminal. It is a block diagram of the state which removed the 2nd DC power unit from the 1st and 2nd terminal. (A) is the schematic which shows the attachment / detachment jig and power supply cable which concern on other embodiment of this invention, (b) is the schematic which shows the state which removed the magnetic part of the attachment / detachment jig from the main-body part. It is the schematic which shows the state which wound the fixed band around the load cable. It is the schematic which shows the magnetic part of the attachment / detachment jig which concerns on other embodiment of this invention. It is a schematic sectional drawing which shows the state by which the magnetic part was fitted by the hexagon bolt.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiment, the DC power supply device replacement system using the present attachment / detachment jig will be used. Of course, the attachment / detachment tool is not limited to the DC power supply device replacement system. Absent.

  FIG. 1 is a block diagram showing a DC power supply replacement system according to an embodiment of the present invention.

  The DC power supply replacement system 1 includes a load 2, first and second terminals 32, 33 as terminals to which a later-described crimp terminal of the load 2 is connected, and a third connected to the first terminal 32. A terminal block 3 including a terminal 34 and a fourth terminal 35 conducted to the second terminal 33. The DC power supply replacement system 1 includes a first DC power supply 4 connected to the third and fourth terminals 34 and 35 and a temporary power supply connectable to the first and second terminals 32 and 33. And a second DC power supply device 5 as a device. Furthermore, the DC power supply replacement system 1 connects the first DC power supply 4 with a third DC power supply 6 that can be replaced with the first DC power supply 4, and the second DC power supply 5 with the first and second terminals 32 and 33. Detachable jigs 7 and 7 that can be removed are provided.

  FIG. 2 is a schematic perspective view showing a state in which a load cable and a power cable are connected to each terminal.

  As shown in FIG. 1, the load 2 includes a DC load 21 and a load cable 22 connected to the DC load 21, and the load cable 22 includes a plus side load cable 221 and a minus side load cable 222. Further, as shown in FIG. 2, a crimp terminal 221a is provided at one end of the plus side load cable 221, and a crimp terminal 222a is provided at one end of the minus side load cable 222.

  For example, as shown in FIG. 2, the terminal block 3 includes a substrate 31 and first to fourth terminals 32, 33, 34, and 35 provided on the substrate 31. The first terminal 32 is electrically connected to the third terminal 34, and the second terminal 33 is electrically connected to the fourth terminal 35, as will be described later.

  FIG. 3 is a partial cross-sectional view of FIG.

  The first terminal 32 passes through a first terminal member 321 as a thin plate-like terminal member disposed on the substrate 31 and a hole provided in the first terminal member 321 as shown in FIGS. 2 and 3, for example. A cross-recessed pan-head screw 322 as a screw that can be screwed onto the substrate 31 is provided. The cross-recessed pan head screw 322 has a hemispherical head 322a and a foot 322b following the head. When the plate-shaped crimping terminal 221a of the plus side load cable 221 is sandwiched between the head 322a and the first terminal member 321, the foot part 322b is screwed to the substrate 31, and the crimping terminal 221a of the plus side load cable 221 becomes the first crimping terminal 221a. The first terminal member 321 is crimped and is electrically connected to the first terminal member 321.

  Similarly, the second terminal 33 as a terminal, for example, as shown in FIGS. 2 and 5, similarly to the first terminal 32, a second terminal member 331 as a terminal member disposed on the substrate 31, and the substrate 31. And a cross-recessed pan head screw 332 as a screw that can be screwed onto the head. The cross-recessed pan head screw 332 has a hemispherical head 332a and a foot 332b following the head. When the foot portion 332b is screwed to the substrate 31 with the plate-shaped crimping terminal 222a of the negative load cable 222 sandwiched between the head 332a and the second terminal member 331, the crimping terminal 222a is crimped to the second terminal member 331. And conducted to the second terminal member 331.

  As shown in FIG. 1, the first DC power supply device 4 includes a first power supply unit 41, a power supply cable 42 that supplies a current of the first power supply unit 41 to the third and fourth terminals 34 and 35, and It has. The first power supply unit 41 includes, for example, a battery 411 having an output voltage of 108 volts, a switch 412 for turning on / off the current supply of the battery 411, and a positive connector for connecting the on / off current to the power cable 42. 413 and a minus side connector 414. Further, the power cable 42 includes a plus-side power cable 421 and a minus-side power cable 422. One end of the plus-side power cable 421 includes a connector (not shown) connected to the plus-side connector 413 and a plate-like crimp terminal 421a connected to the third terminal 34 on the opposite side, for example, as shown in FIG. Yes. Further, one end of the minus side power cable 422 is provided with a connector (not shown) connected to the minus side connector 414 and a plate-like crimp terminal 422a on the opposite side.

  The third terminal 34 includes, for example, a third terminal member 341 disposed on the substrate 31 and a cross-holed pan that can be screwed to the substrate 31 as in the case of the first terminal 32 as shown in FIGS. The cross-recessed pan-head screw 342 includes a hemispherical head 342a and a foot 342b. When the foot portion 342b is screwed to the substrate 31 with the plate-like crimp terminal 421a of the plus-side power cable 421 sandwiched between the head portion 342a and the third terminal member 341, the crimp terminal 421a is crimped to the third terminal member 341. And conducted to the third terminal member 341. Here, since the first terminal member 321 and the third terminal member 341 are electrically connected, eventually, the current from the first DC power supply device 4 is loaded via the third terminal 34 and the first terminal 32. 2 can flow.

  As in the case of the third terminal 34, the fourth terminal 35 includes a fourth terminal member 351 disposed on the substrate 31, and a cross-headed pan screw 352 that can be screwed to the substrate 31. The cross-recessed pan-head screw 352 has a hemispherical head 352a and a foot (not shown). When the foot is screwed to the substrate 31 with the plate-like crimp terminal 422a of the negative power cable 422 sandwiched between the head 352a and the fourth terminal member 351, the crimp terminal 422a is crimped to the fourth terminal member 351. The fourth terminal member 351 is electrically connected. Here, since the second terminal member 331 and the fourth terminal member 351 are conductive, eventually, the current from the load 2 passes through the second terminal 33 and the fourth terminal 35 and the first DC power supply device. 4 can flow.

  As shown in FIG. 1, the second DC power supply device 5 includes a second power supply unit 51 and a power cable 52 that supplies a current of the second power supply unit 51.

Here, the second power supply unit 51 includes, for example, a battery 511 having an output voltage of 108 volts, an adjustment unit 512 that is connected to the positive side of the battery 511 and adjusts the power supply voltage E2 of the _second power supply unit 51, and an external And a rectifying element 513 for blocking current from the. Further, a connector 514 connected to the rectifying element 513 and a connector 515 connected to the negative side of the battery 511 are provided. For the adjustment unit 512, for example, a voltage adjustment circuit using a voltage drop of a silicon diode or the like is used.

Further, the power supply voltage E ₂ of the _second power supply unit 51 is set by the adjustment unit 512 so as to be lower than E ₁ that is the power supply voltage of the _first power supply unit 41 (E ₂ <E ₁ ). Therefore, even if the second DC power supply device 5 is connected in parallel to the first DC power supply device 4 to the first and second terminals 32 and 33 by the attachment / detachment jig 7, the rectifying element that prevents the voltage difference and the current from flowing in. 513 can be prevented from being damaged or consumed.

  The rectifying element 513 allows the current from the connected adjustment unit 512 to flow, but does not flow the current flowing in the reverse direction to the adjustment unit 512. For example, a backflow prevention diode is used.

  FIG. 4A is a schematic perspective view of a state where a power cable is connected to the attachment / detachment jig, and FIG. 4B is a schematic perspective view of a state where a magnetic part is removed from the main body.

  The power cable 52 includes a plus-side power cable 521 and a minus-side power cable 522. For example, as shown in FIG. 4, the plus-side power cable 521 has a connector 521a at one end and a connector 521b at the other end. The power cable 522 has a connector 522a at one end and a connector 522b at the other end. As a result, the connectors 521b and 522b are connected to the connectors 514 and 515 on the second power supply unit side, the remaining connectors 521a and 522a are connected to the attachment / detachment jig 7 which will be described later, and the current from the second power supply unit 51 is attached / detached. It will flow to the jig 7.

  For example, as shown in FIG. 4, the detachable jig 7 is attached to the first terminal 32 and the second terminal 33, which can be attached to and detached from the main body 71 to which the connector 521 a or 522 a of the power cable is connected. And a possible magnetic part 72.

  For example, as shown in FIG. 4 (a), the main body 71 includes a thicker holding part 711, a connecting part 712 that connects the holding part 711 and the magnetic part 72 narrower than the thicker holding part 711, and the holding part. 711 and a conductive member 713 that penetrates the connecting portion 712.

  The holding part 711 has a connector (not shown) connected to the connector 521a of the plus-side power cable 521, and the conducting member 713 conducts the connector (not shown) and the magnetic part 72. Further, at least the surfaces of the holding portion 711 and the connecting portion 712 are formed of an insulating material, and the tip end surface of the connecting portion 712 is provided with a screw portion 712a so that the magnetic portion 72 can be screwed.

  FIG. 5 is a schematic cross-sectional view of a state in which a detachable jig is fitted to the first terminal or the second terminal.

  As for the magnetic part 72, the contact surface with the 1st terminal 32 or the 2nd terminal 33 covers the head 322a of the cross screw 322 with the cross hole of the 1st terminal 32 as shown, for example in FIG.4 and FIG.5. The opposite side of the connecting portion 712 side has a concave shape 721 so that it is possible. Since a cross-shaped groove 322aa is formed at the top of the head 322a, a cross-shaped protrusion 721a that fits in the groove 322aa is provided at the center of the concave shape 721.

  As a result, some great external force acts on the attaching / detaching jig 7, and even if the concave shape 721 of the magnetic portion 72 tries to slide on the head 322a, the protrusion 721a is caught in the groove 322aa and a reaction force is generated, so that the sliding can be stopped. . Therefore, the detachable jig 7 can be securely fitted by the first and second terminals 32 and 33. Further, since the magnetic part 72 is magnetized and needs to have conductivity, it is made of a metal such as iron, for example.

  Further, the crimping terminals 221a and 222a of the load cable are not restricted to the cross-recessed pan head screws 322 and 332 as shown in FIG. 2 in order to be crimped to the first and second terminal members 321 and 331. For example, a minus screw may be used. In this case, as shown in FIG. 4B, the magnetic part 72 has a minus projection 721b formed at the center of the concave shape 721 described above, and the head of the minus screw is securely fitted. It can be done.

  Note that the above-described protrusion does not necessarily need to be fitted into the entire groove on the head, and for example, if it is a cross-shaped groove 322aa, it may be one linear protrusion 721b of two intersecting linear protrusions. However, it may be four protrusions fitted near the four ends of the cross-shaped groove 322aa. Thereby, for example, if it is one linear protrusion, it can respond also to a minus screw, and if it is four protrusions, it will be able to fit firmly in a cross-shaped groove of a slightly different size without slipping.

  Further, as shown in FIG. 5, it is preferable that the magnetic portion 72 is fitted to be slightly separated so as not to contact the surfaces of the crimp terminals 221a and 222a.

  For example, when the screw is a cross-headed pan-head screw 322, the magnetic part 72 has a concave shape 721 having a depth exactly the same as the height of the head 322a. In this case, the depth of the concave shape 721 of the magnetic part 72 may be slightly larger than the height of the head 322a due to manufacturing errors of the screw, screwing of the screw, and the like. In this case, when the magnetic part 72 is put on the head part 322a, the magnetic part 72 may come into contact with the surface of the crimp terminal 221a to be crimped, and the magnetic part 72 is insufficiently fitted to the head part 322a. There is a fear.

  Therefore, for example, the depth (maximum depth) of the concave shape 721 of the magnetic part 72 is formed smaller than the height (maximum height) of the head 322a of the pan-head screw 322 with a cross hole. If it does so, even if the depth of the concave shape 721 becomes slightly larger than the height of the head 322a due to manufacturing errors, screwing, etc., it is possible to reduce the possibility of contact with the surface of the crimp terminal 221a to be crimped. As a result, the magnetic part 72 can be more securely fitted to the cross hole pan-head screw 322.

  For example, as shown in FIG. 1, the third DC power supply device 6 includes a third power supply unit 61 and a power cable 62 that supplies the current of the third power supply unit 61 to the third and fourth terminals 34 and 35. And. The power supply unit 61 includes, for example, a battery 611 with an output voltage of 108 volts, and a plus-side connector 612 and a minus-side connector 613 that connect the current of the battery 611 to the power supply cable 62. Further, the power cable 62 includes a plus side power cable 621 and a minus side power cable 622. One end of the plus-side power cable 621 includes a connector (not shown) connected to the plus-side connector 612 and a crimp terminal 621a connected to the third terminal 34 on the opposite side. Further, one end of the minus side power cable 622 is provided with a connector (not shown) connected to the minus side connector 613 and a crimp terminal 622a on the opposite side.

Further, the power supply voltage E ₃ of the _third power supply unit 61 is set higher than E ₂ that is the power supply voltage of the _second power supply unit 51 (E ₂ <E ₃ ). Therefore, the third DC power supply 6 is connected to the third and fourth terminals 34 and 35 from which the first DC power supply 4 is removed as shown in FIG. Even if the power supply device 5 is connected in parallel, the DC power supply device can be prevented from being damaged or consumed by the voltage difference and the rectifying element 513 that prevents the current from flowing.

  As described above, since the magnetic portion 72 is fitted to the head 322a of the cross-headed pan-head screw 322, which is a fastening member, instead of the crimp terminals 221a and 222a of the load cable 22, a wider contact area is secured. A stable connection by magnetic force can be achieved.

  Further, since the protrusion 721a that fits into the groove 322aa of the head 322a of the cross-headed pan screw 322 is in the concave shape 721 of the magnetic part 72, the protrusion 721a is caught in the groove 322aa to generate a reaction force, and the magnetic part 72 Can stop sliding on the surface of the head 322a. Thereby, the connection of the 2nd DC power supply device 5 to the 1st and 2nd terminals 32 and 33 can be achieved reliably.

  Furthermore, if the depth of the concave surface shape 721 of the magnetic portion 72 is formed smaller than the height of the head 322a of the cross-recessed pan head screw 322, the depth of the concave surface shape 721 may be slightly increased due to manufacturing errors or screw screwing. Even if it becomes larger, the possibility of contacting the surface of the crimp terminal 221a can be reduced. As a result, the magnetic part 72 can be more securely fitted to the cross hole pan-head screw 322.

Further, the power supply voltage E ₂ of the second direct-current power supply 5 and lower than E _1, E ₃ is the power supply voltage of each of the first and third direct-current power supply 4, 6, and prevents the flow of current Since the rectifying element 513 is provided, the DC power supply can be replaced without a power failure while preventing damage and wear of the DC power supply, as will be described in detail later.

  Next, a method and operation for replacing the first DC power supply device with the third DC power supply device using the present attachment / detachment tool without a power failure will be described.

  FIG. 6 is a flowchart of a method for replacing the first DC power supply device with the third DC power supply device without an uninterruptible power using a detachable jig.

  FIG. 7 is a block diagram showing a state before the first DC power supply device is replaced.

  First, as a premise, in the DC power supply replacement system 1, as shown in FIG. 7, the first DC power supply device 4 is connected to the third terminal and the fourth terminals 34 and 35, and the load 2 is connected to the first terminal and the second terminal. The terminals 32 and 33 are connected.

First, to measure the power supply voltage _{E 3} of the third power supply portion 61 of the first DC power supply first power supply voltage _{E 1} and the third power source unit 41 of the fourth DC power supply device 6 (ST 101). Then, the power source voltage _{E 2} adjustment portion 512 of the second power supply portion 51 of the second direct-current power supply 5 is adjusted such that _E 2 _{<E 1} and _{E 2 <E 3 (ST102)} . Here, the lower limit value of E ₂ varies depending on the DC load 21 used, but it is naturally required that it is at least the minimum voltage required for the DC load 21.

Next, as shown in FIGS. 4 (a) and 4 (b), the magnetic parts 72 each having a cross-shaped projection 721a formed in a concave shape 721 are screwed to the main body parts 71 of the two attachment / detachment jigs 7 and 7, respectively. To do. Then, the connector 521a of the plus side power cable 521 of the second DC power supply device 5 is connected to the connector of one main body 71, and the connector 522a of the minus side power cable 522 is connected to the connector of the remaining body 71. . Further, the connector 522b of the negative power cable 522 is connected to the connector 515 of the second power supply unit 51 of the second DC power supply device 5 adjusted so that E ₂ <E ₁ and E ₂ <E ₃ (ST103). .

  FIG. 8 is a block diagram of a state in which a detachable jig connected to the negative side of the second power supply unit is connected to the second terminal.

  The portion of the concave shape 721 of the attaching / detaching jig 7 connected to the minus side power cable 522 is fitted to the hemispherical head 332a of the cross-headed pan screw 332 of the second terminal 33 using the magnetic force of the magnetic part 72. Wear (ST104). At this time, as shown in FIG. 2, a cross-shaped groove 332aa is formed in the head 332a of the cross-headed pan screw of the second terminal 33, and the concave shape 721 of the magnetic part 72 is formed as shown in FIG. The cross-shaped protrusion 721a fits into the groove 332aa, and the connection state can be stably maintained.

  That is, as shown in FIG. 5, the magnetic part 72 is fitted on the head 332a of the cross-headed pan screw 332 that is a fastening member, not the crimp terminals 221a and 222a of the load cable 22, so that a wider contact area is obtained. It is possible to secure a stable connection by magnetic force. Further, since the protrusion 721a that fits into the groove 332aa of the head 332a of the cross-headed pan screw 332 is in the concave shape 721 of the magnetic part 72, the protrusion 721a is caught in the groove 332aa to generate a reaction force, and the magnetic part 72 Can stop sliding on the surface of the head 332a.

  This state differs from the initial state of FIG. 2 in that the detachable jig 7 is connected to the second terminal 33, but the connection is connected to the second terminal 33 on the negative side of the load 2. Only the negative side of the two DC power supply devices 5 is connected. Therefore, while the current from the first DC power supply device 41 flows through the load 2 as usual, there is no current flow from the first DC power supply device 41 to the second power supply unit 51, and conversely the second power supply. There is no current flow from the unit 51 to the first DC power supply device 41.

  FIG. 9 is a block diagram of a state in which the detachable jig connected to the positive side of the second power supply unit and the detachable jig connected to the negative side are connected to the first and second terminals, and FIG. FIG.

  Next, the connector 521b of the plus-side power cable 521 is connected to the connector 514 of the second power supply unit 51 of the second DC power supply device 5 (ST105). The portion of the concave shape 721 of the attachment / detachment jig 7 connected to the plus-side power cable 521 is applied to the hemispherical head 322a of the cross-headed pan-head screw 322 of the first terminal 32 using the magnetic force of the magnetic part 72. Fit (ST106). At this time, a cross-shaped groove 322aa is formed in the head 322a of the cross-recessed pan head screw 322, and the cross of the concave shape 721 of the magnetic part 72 is formed as in the second terminal 33 as shown in FIG. The protrusion 721a having a shape fits into the groove 322aa, and the connection state can be stably maintained.

With the above connection, as shown in FIGS. 9 and 10, the first DC power supply device 4 and the second DC power supply device 5 are connected in parallel to the first terminal 32 and the second terminal 33. Become. However, since the power supply voltage E ₁ of the _first DC power supply device 4 is higher than the power supply voltage E ₂ of the second DC power supply device 5, the potential of the first terminal 32 is the attachment / detachment jig 7 of the second DC power supply device 5. Therefore, no current flows from the second DC power supply device 5 to the first terminal 32. Conversely, the current does not flow from the first DC power supply 4 to the second DC power supply 5 via the first terminal 32 because it is stopped by the rectifying element 513 of the second DC power supply, for example, a diode.

  Therefore, even if the second DC power supply 5 is connected to the first and second terminals 32 and 33, no current flows from the second DC power supply 5, and no current flows from the first DC power supply 4. A constant supply to the load 2 is made, and unnecessary consumption of the second DC power supply device 5 can be prevented. Furthermore, since no current flows from the first DC power supply device 4 to the second DC power supply device 5, the second DC power supply device 5 is not damaged, and the voltage and current to the load 2 change. Nor.

  Moreover, after attaching the detachable jig 7 of the minus side power cable 522 to the second terminal 33 as described above, the detachable jig 7 of the plus side power cable 521 is fitted to the first terminal 32. Unnecessary accidents can be prevented even when the current of the second DC power supply 5 flows.

  FIG. 11 is a block diagram showing a state where the switch of the first DC power supply device is turned off.

  Next, when the switch 412 of the first DC power supply device 4 is turned off (ST107), the first DC power supply device 4 has been supplied to the first terminal 32 connected to the third terminal 34 until then. There is no current. As a result, since the potential of the first terminal 32 is higher than the potential of the second DC power supply device 5 until then, the current from the second DC power supply device 5 that has not flowed to the first terminal 32 passes through the attachment / detachment jig 7. Through which it flows to the load 2.

  That is, since the second DC power supply device 5 is connected to the first and second terminals 32 and 33 at least when the current supply of the first DC power supply device 4 is stopped, the third and fourth terminal sides Thus, regardless of whether or not the first DC power supply 4 is disconnected, the current flows through the load 2 without a power failure.

  FIG. 12 is a block diagram of a state in which the first DC power supply device is removed.

  The first DC power supply device 4 is removed from the third and fourth terminals 34 and 35 (ST108). That is, the cross-recessed pan head screws 342 and 352 of the third and fourth terminals 34 and 35 shown in FIG. 10 are removed from the substrate 31 by screwing or the like, and the crimp terminals 421a and 422a of the power cable 42 are third and fourth. Remove from the terminal members 341 and 351. At this time, since the second DC power supply device 5 is already connected to the first and second terminals 32 and 33, and the current from the second DC power supply device 5 flows to the load 2, Even if the crimp terminals 421a and 422a of the power cable 42 are removed, no power failure occurs.

  FIG. 13 is a block diagram of a state in which the third DC power supply device is connected to the third and fourth terminals.

  Next, as shown in FIG. 13, third DC power supply device 6 is connected to third and fourth terminals 34 and 35 (ST109). That is, the cross-recessed pan-head screws so that the crimp terminals 621a, 622a of the power cable 62 are sandwiched between the third and fourth terminal members 341, 351 and the heads 342a, 352a of the cross-head pan-head screws 342, 352. 342 and 352 are screwed to the substrate 31.

With the above connection, the third DC power supply device 6 is also conducted to the first and second terminals 32 and 33, so that the second DC power supply device 5 and the third DC power supply device 6 are connected to the first terminal 32. And the second terminal 33 are connected in parallel. Then, since the power supply voltage E ₃ of the _third DC power supply device 6 is higher than the power supply voltage E ₂ of the second DC power supply device 5, the first power supply voltage E ₂ of the _second DC power supply device 5 so far is used. The potential of the power supply voltage E3 of the _third DC power supply device 6 is higher than the potential of the terminal 32. Therefore, a current flows from the third DC power supply device 6 to the first terminal 32, the potential of the first terminal 32 becomes higher than the potential due to the power supply voltage E2 of the _second DC power supply device 5, and the second DC No current flows from the power supply device 5 to the first terminal 32.

  Therefore, unnecessary consumption of the second DC power supply device 5 can be prevented. Conversely, current does not flow from the third DC power supply device 4 to the second DC power supply device 5 through the first terminal 32 because it is stopped by the rectifying element 513 of the second DC power supply device, for example, a diode.

  FIG. 14 is a block diagram of a state in which the second DC power supply device is removed from the first and second terminals.

  Finally, as shown in FIG. 14, the second DC power supply 5 is disconnected from the first and second terminals 32 and 33 (ST110), whereby the first DC power supply 4 is replaced with a new third DC power supply 6. The work to replace is completed. That is, the detachable jigs 7 and 7 fitted to the heads 322a and 332a of the cross-headed pan screws 322 and 332 of the first and second terminals 32 and 33 are removed from the heads 322a and 332a, and the second The power cable 52 is removed from the second power supply unit 51 of the DC power supply device 5 to complete the work.

  At this time, the flow of current from the second DC power supply device 5 to the first terminal 32 is stopped, and the current supply to the load 2 is supplied from the third DC power supply device 6 via the first terminal 32. It has become. Therefore, even if the second DC power supply device 5 is disconnected from the first and second terminals 32 and 33, the supply of current to the load 2 does not fail, and a predetermined current from the third DC power supply device 6 is generated. It will flow.

  From the above, the first DC power supply 4 is replaced with a new third DC power supply 6 without any power failure without damage to the first, second and third DC power supplies 4, 5 and 6 and wasteful consumption. It becomes possible.

  In the above description, the load 2, the first DC power supply device 4, and the first to fourth terminals 32 to 35 connecting them are described as one, but a plurality of combinations may be provided. . Connection of the second DC power supply device 5, removal of the first DC power supply device 4, connection of the third DC power supply device 6, and removal of the second DC power supply device 5 may be sequentially performed for each combination. Good.

  As a result, when there are a plurality of first DC power supply devices 4, the second power supply voltage lower than the power supply voltages of the first DC power supply device 4 and the third DC power supply device 6 is the same as when there is only one. The DC power supply device 5 can be exchanged without interruption, at a safe and low cost. Of course, it is not necessary to replace the DC power supply devices one by one, and the plurality of first DC power supply devices 4 and the second DC power supply devices 5 and the third DC power supply devices 6 corresponding to the number of the first DC power supply devices 4 are grouped. The replacement work may be performed for each group.

  FIG. 15A is a schematic view showing a detachable jig and a power cable according to another embodiment of the present invention, and FIG. 15B is a schematic view showing a state in which the magnetic part of the detachable jig is removed from the main body part. FIG.

  Here, the parts other than the main body of the attachment / detachment jig are the same as those of the attachment / detachment jig 7 described above, and therefore, the same reference numerals are used and description thereof is omitted.

  For example, as shown in FIG. 15A, the main body 81 includes a thicker holding part 811 so that the operator can easily grasp it, a connecting part 812 that connects the holding part 811 and the magnetic part 72 thinner, and a connecting part thereof. A fixing band 813 having one end wound around and fixed to 812 and a conduction member 814 that penetrates the connecting portion 812 from the holding portion 811 are provided.

  The holding portion 811 has a connector (not shown) connected to the connector 521a of the plus-side power cable 521, and the conducting member 814 conducts the connector (not shown) and the magnetic portion 72. Further, at least the surfaces of the holding portion 811 and the connecting portion 812 are formed of an insulating material, and the tip surface of the connecting portion 812 is threaded portion 812a so that the magnetic portion 72 can be screwed as shown in FIG. Is provided.

  FIG. 16 is a schematic view showing a state in which the fixed band is wound around the load cable.

  The fixed band 813 has a belt-like shape as a whole, and the end opposite to the side wound around the connecting portion 812 is detachable like a magic tape (registered trademark). Accordingly, for example, as shown in FIG. 16, the detachable jig 7 is fixed to the portion where the detachable end portion is wrapped around the protective cap 222 b of the minus side load cable 222 and the detachable end portion is wound around the connecting portion 812. 2 can be securely attached to the second terminal 33. Further, the connection error can be prevented by connecting the fixed band 813 to the load cable 22 to be connected.

  In FIG. 16, a protective cap 222b is provided in which the terminal side portion of the load cable 22 is bent substantially vertically from the crimp terminal 222a. Of course, the protective cap 222b is fixed straight from the crimp terminal 222a. It may be a protective cap. For example, even in the case of FIG. 10, the attachment / detachment jig 7 can be securely held on the second terminal 33 by the fixing band 813. However, more preferably, the portion to be fixed to the connecting portion 812 of the detachable jig 7 should be substantially parallel as shown in FIG. Further, although Velcro (registered trademark) is used in FIG. 16, a simple band may be tied and fixed.

  Further, as shown in FIG. 16, the attachment / detachment jig 7 fitted to the first terminal 32 is provided with a fixing band 813 similarly to the attachment / detachment jig 7 fitted to the second terminal 33.

  FIG. 17 is a schematic view showing a magnetic part of a detachable jig according to another embodiment of the present invention, and FIG. 18 is a schematic cross-sectional view showing a state in which the magnetic part is fitted to a hexagon bolt.

  Here, since the parts other than the magnetic part of the attachment / detachment jig are substantially the same as those of the attachment / detachment jig 7 described above, the same reference numerals are used and description thereof is omitted.

  For the first and second terminals 32 and 33, cross-headed pan head screws 322 and 332 and a minus screw are used, but hexagon bolts 324 and 334 may be used. However, in that case, the magnetic part 92 needs to be able to be firmly fitted to the heads 324a and 334a.

  Therefore, the magnetic part 92 is recessed in a hexagonal shape as shown in FIG. 17 on the opposite side to the connecting part 713 side so that the contact surface with the first terminal 32 can cover the head part 324a of the hexagon bolt 324. A concave shape 921 is provided. Further, the magnetic part 92 is provided with a through hole 922 at the center so that the tip of the conducting member 713 of the attachment / detachment jig 7 can directly contact the head 324a of the hexagon bolt 324 as shown in FIG. The threaded portion 712a at the tip of the connecting portion 712 is screwed into the through-hole 922, and the end of the conducting member 713 in the connecting portion 712 appears on the concave shape 921 side as shown in FIG. Thereby, the 2nd DC power supply device 5 can be reliably conducted to the 1st and 2nd terminal 32,33. In addition, as shown in FIG. 18, it is preferable that the magnetic part 92 is fitted a little apart so as not to contact the surfaces of the crimping members 221a and 222a. If it contacts the surfaces of the pressure-bonding members 221a and 222a, there is a risk that the fitting by magnetic force will be insufficient.

  The embodiment according to the present invention is not limited to the above-described embodiment, and various other embodiments are conceivable.

  For example, the attachment / detachment jig 7 according to each of the above embodiments is configured such that one attachment / detachment jig is fitted to one terminal. However, the magnetic part 72 is fitted to the first terminal 32 and is conducted to the plus-side power cable, while the second terminal 33 is fitted to another magnetic part 72 and is conducted to the minus-side power cable. The two magnetic parts may be insulated from each other and housed in one housing. Thereby, since the attachment / detachment jig provided with the two magnetic parts is fitted by the magnetic force at two places as compared with the case where there is only one magnetic part, it is possible to hold a preferable connection state more stably.

  In addition, the third power supply unit 61 according to each of the above embodiments has not particularly referred to a switch like the first power supply unit 41, but a switch may be provided in the same manner as the first power supply unit 41. . Conversely, by supplying the current from the first DC power supply 4 by removing the first DC power supply 4 from the third and fourth terminals 34 and 35 without providing the switch 412 in the first power supply unit 41. May be stopped.

  Moreover, although the power supply device according to each of the above embodiments has been described as a DC power supply device, a detachable jig capable of reliably and stably connecting and removing a temporary power supply device to a terminal connected to a load is provided. The temporary power supply device may be an AC power supply device.

2 ... Load 22 ... Load cable 221a, 222a ... Crimp terminal 32 ... First terminal (corresponding to terminal)
33 ... 2nd terminal (equivalent to a terminal)
321 ... 1st terminal member (equivalent to a terminal member)
331 ... 2nd terminal member (equivalent to a terminal member)
322, 332 ... Cross-recessed pan head screws (corresponding to screws)
322a, 332a ... head 322aa, 332aa ... groove 322b, 332b ... foot 5 ... second DC power supply (corresponding to temporary power supply)
7 ... Removable jig 71, 81 ... Main body 72, 92 ... Magnetic part 721, 921 ... Concave surface shape 721a, 721b ... Projection 813 ... Fixed band

Claims (4)

A detachable jig that allows a temporary power supply device to be connected to and detached from a terminal to which a load crimp terminal is connected,
The terminal has a terminal member and a screw,
The screw has a foot passing through the terminal member and a head having a diameter larger than the foot and a groove on the side opposite to the foot , and the crimping between the head and the terminal member. Crimp the crimp terminal to the terminal member so as to sandwich the terminal,
A magnetic part having a concave shape having a protrusion that covers the head, and a magnetic part that can be fitted by the magnetic force so that the protrusion fits in the groove with the concave shape on the head;
A main body for electrically connecting the magnetic part and the temporary power supply device;
A detachable jig for electrically connecting the head and the temporary power supply device by fitting the magnetic part to the head. The attachment / detachment jig according to claim 1 ,
The magnetic part is a detachable jig held on the main body part so as to be replaceable in accordance with the shape of the head part. The attachment / detachment jig according to claim 1 or 2 ,
The load has a load cable including the crimp terminal,
The main body is a detachable jig having a fixing band for fixing to the load cable. The attachment / detachment jig according to any one of claims 1 to 3 ,
The magnetic part is a detachable jig in which the depth of the concave recess is smaller than the height of the head.

Images