Shorting device and terminal block unit

Abstract

To provide a countermeasure for minute load current without causing problems such as design changes, equipment arrangements, and securing modification personnel, even when adopted after panel manufacturing. [Solution] One aspect of the present invention is a short-circuiting device for short-circuiting multiple terminal blocks. The short-circuiting device has a first conductive part electrically connected to a conductive part of the terminal block. The short-circuiting device has a second conductive part electrically connected to another short-circuiting device. The second conductive part is electrically connected to the second conductive part of the other short-circuiting device.

Description

[Technical Field]

[0001] The present invention relates to a short-circuiting device and a terminal block unit. [Background technology]

[0002] The technology described in Patent Document 1 relates to a device for simply and reliably short-circuiting terminal members of a screw-up type terminal block. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-71518 Summary of the Invention [Problem to be solved by the invention]

[0004] Input devices such as input modules for sequencers may encounter situations where only a minute load current flows. Ordinary contacts and switches are designed on the assumption that a certain amount of current will flow. In the case of a minute load current, the contacts may not operate reliably, the contact resistance may increase, or the contacts may become dirty, causing poor contact.

[0005] To handle minute load currents, a resistor is connected in parallel to the contacts to intentionally increase the current passing through the contacts. Connecting a resistor ensures that the contacts operate reliably and prevents contact failure. However, the known method of connecting a resistor has the following problems:

[0006] With known methods of connecting resistors, if a need arises for measures to deal with minute load currents after the panel has been manufactured, design changes are required to add a resistor unit, which may involve redesigning the panel layout and electrical circuits.

[0007] Known methods of connecting resistors require the procurement of new resistor units and the logistics of adding them to existing panels, which can cause inventory management and delivery issues.

[0008] Modification of panels requires engineers with specialized knowledge and skills, and securing technicians and scheduling the work is costly and time-consuming.

[0009] These factors add up to a significant cost for known methods of connecting resistors, including design changes, equipment, and personnel for modifications. Known methods also require consideration of downtime, especially when making these modifications to an operational system.

[0010] As mentioned above, parallel connection of resistors is an effective way to deal with minute load currents. However, if this becomes necessary after the panel has been assembled, various problems can arise. [Means for solving the problem]

[0011] One aspect of the present invention is a short-circuiting device for short-circuiting multiple terminal blocks. The short-circuiting device includes a first conductive part electrically connected to a conductive part of the terminal block. The short-circuiting device includes a second conductive part electrically connected to another short-circuiting device. The second conductive part is electrically connected to the second conductive part of the other short-circuiting device.

[0012] One aspect of the present invention is a terminal block unit for electrical connection. The terminal block unit includes a plurality of terminal blocks. The terminal block unit includes a plurality of short-circuiting devices for short-circuiting the plurality of terminal blocks. The terminal blocks include conductive portions. The terminal blocks include a plurality of fasteners fixed to the conductive portions. The short-circuiting device includes a first conductive portion electrically connected to the conductive portions of the terminal blocks. The short-circuiting device includes a second conductive portion electrically connected to another short-circuiting device. The second conductive portion is electrically connected to the second conductive portion of the other short-circuiting device. [Effects of the Invention]

[0013] The short-circuiting device and terminal block unit according to the present invention contribute to countering minute load currents even when used after the panel has been manufactured, without causing problems such as design changes, arranging for equipment, or securing personnel for modifications.

[0014] The present invention is also expected to contribute to the efficiency of electrical connections, improved safety, sustainable energy use, and sustainable development of industrial infrastructure, thereby contributing to the achievement of the SDGs aimed at realizing a sustainable society.

[0015] For example, shorting devices and terminal block units are devices for making reliable and efficient electrical connections, contributing to the efficient use and distribution of energy. This improves the reliability and sustainability of energy infrastructure. Thus, this invention contributes to achieving the goal set out in Target 7.1 of the SDGs, which is to "ensure universal access to affordable, reliable and modern energy services by 2030."

[0016] For example, shorting devices and terminal block units that contribute to the efficiency of electrical infrastructure contribute to the improvement of sustainable resource management and utilization. This optimizes resource utilization in electrical infrastructure. In this way, this invention contributes to achieving the goal of "achieve sustainable management and efficient use of natural resources by 2030" as stated in Target 12.2 of the SDGs. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view showing an example of a terminal block unit 100. [Figure 2] FIG. 2 is a perspective view showing an example of a terminal block 110. [Figure 3] FIG. 2 is a front view showing an example of a terminal block 110. [Figure 4] FIG. 2 is a plan view showing an example of a terminal block 110. [Figure 5] FIG. 2 is a perspective view showing an example of a short-circuit device 120. [Figure 6] FIG. 2 is a front view showing an example of a short-circuit device 120. [Figure 7] FIG. 2 is a rear view showing an example of the short-circuit device 120. [Figure 8] FIG. 2 is a side view showing an example of a short-circuit device 120. [Figure 9] 1 is a plan view showing an example of the internal configuration of a short-circuit device 120. FIG. [Figure 10] FIG. 1 is a front view showing an example of the internal configuration of a first short-circuit device 120A, which is a short-circuit device 120 of the first embodiment. [Figure 11] FIG. 10 is a front view showing an example of the internal configuration of a second short-circuit device 120B which is a short-circuit device 120 of a second embodiment. [Figure 12] FIG. 10 is a front view showing an example of the internal configuration of a third short-circuit device 120C, which is a short-circuit device 120 of a third embodiment. [Figure 13] 10 is a front view showing an example of a procedure for attaching the short-circuiting device 120 to the terminal block 110. FIG. [Figure 14] 10 is a front view showing an example of a procedure for attaching the short-circuiting device 120 to the terminal block 110. FIG. [Figure 15] 10 is a front view showing an example of a procedure for attaching the short-circuiting device 120 to the terminal block 110. FIG. [Figure 16] 10 is a perspective view showing an example of a method for connecting terminal blocks 110 to which short-circuiting devices 120 are attached, and an example of a method for connecting a terminal block 110 to which short-circuiting devices 120 are attached and an end plate EP. FIG. [Figure 17] FIG. 10 is a circuit diagram showing an example of a countermeasure against a minute load current. [Figure 18] 18 is a diagram showing an example of how to use a short-circuiting device 120 when taking measures against the minute load current shown in FIG. 17 using the terminal block unit 100. FIG. [Figure 19] FIG. 10 is a front view showing another example of the short-circuit device 120. [Figure 20] 20 is a front view showing an example of a procedure for attaching the short-circuit device 120 of the other example shown in FIG. 19 to the terminal block 110. FIG. [Figure 21] 20 is a front view showing an example of a procedure for attaching the short-circuit device 120 of the other example shown in FIG. 19 to the terminal block 110. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] The present invention will be described below through embodiments of the invention, but the following embodiments do not limit the scope of the invention according to the claims. Furthermore, not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention.

[0019] FIG. 1 is a perspective view showing an example of a terminal block unit 100. As shown in FIG.

[0020] The terminal block unit 100 is a unit for electrical connection. The terminal block unit 100 includes a plurality of terminal blocks 110 and a plurality of short-circuiting devices 120. In the example shown in FIG. 1 , the terminal block unit 100 includes five terminal blocks 110 and five short-circuiting devices 120.

[0021] The terminal block 110 is a device for electrical connection. Multiple terminal blocks 110 are connected to each other. The outside of the connected multiple terminal blocks 110 is closed by an end plate EP. The end plate EP is attached to a support SM by an end bracket (not shown).

[0022] The short-circuiting tool 120 is a tool for short-circuiting the multiple terminal blocks 110. The short-circuiting tool 120 is attached to each of the multiple terminal blocks 110.

[0023] Fig. 2 is a perspective view showing an example of the terminal block 110. Fig. 3 is a front view showing an example of the terminal block 110. Fig. 4 is a plan view showing an example of the terminal block 110.

[0024] The terminal block 110 includes a conductive portion 111 and a plurality of fasteners 112. In the example shown in Figures 2 to 4, the terminal block 110 includes two fasteners 112: a first fastener 112A and a second fastener 112B.

[0025] The conductive part 111 is a plate-shaped metal part. An opening 111O is formed in the conductive part 111, penetrating its main surface. In the example shown in FIGS. 2 to 4, the conductive part 111 has a rectangular opening 111O formed in a region between two fasteners 112 in a plan view. The conductive part 111 is provided in a resin insulating part 113. In the example shown in FIGS. 2 to 4, the conductive part 111 is provided such that its main surface is perpendicular to the wall surface of a third wall part 113C of the insulating part 113. The third wall part 113C of the insulating part 113 is a wall part provided on the back side of the terminal block 110. In the example shown in FIGS. 2 to 4, the conductive part 111 is provided so as to penetrate the wall surfaces of the first wall part 113A and the second wall part 113B of the insulating part 113. First wall 113A is a wall having a wall surface perpendicular to the wall surface of third wall 113C, and is a wall that separates the area where first fastener 112A is provided, the area where opening 111O is formed, and the outer area. Second wall 113B is a wall having a wall surface perpendicular to the wall surface of third wall 113C, and is a wall that separates the area where second fastener 112B is provided and the area where opening 111O is formed.

[0026] The fastener 112 is a metal part for connecting conductors by means of ensuring a reliable mechanical bond and proper maintenance of electrical contact. The fastener 112 shown in FIGS. 2 to 4 is a screw-type fastener. The fastener 112 is fixed to the conductive portion 111. In the example shown in FIGS. 2 to 4, the fastener 112 is fixed to the longitudinal end of the conductive portion 111 in a plan view.

[0027] Fig. 5 is a perspective view showing an example of short-circuit device 120. Fig. 6 is a front view showing an example of short-circuit device 120. Fig. 7 is a rear view showing an example of short-circuit device 120. Fig. 8 is a side view showing an example of short-circuit device 120. Fig. 9 is a plan view showing an example of the internal configuration of short-circuit device 120.

[0028] Short-circuit device 120 includes first conductive part 121 and second conductive part 122. First conductive part 121 and second conductive part 122 are provided in insulating housing 125 made of resin. In the example shown in FIGS. 5 to 8, first conductive part 121 is provided in a lower part of insulating housing 125. In the example shown in FIGS. 5 to 8, second conductive part 122 is provided in an upper part of insulating housing 125.

[0029] The first conductive portion 121 is a metal component electrically connected to the conductive portion 111 of the terminal block 110. The first conductive portion 121 has an insertion portion 121I that can be inserted into an opening 111O formed in the conductive portion 111 of the terminal block 110. In the example shown in FIGS. 5 to 8, the insertion portion 121I protrudes downward from the lower end of the insulating housing 125. In the example shown in FIGS. 5 to 7, the insertion portion 121I has a tapered shape that widens outward from the base end to the tip end in a front view. A notch 121N is formed in the center of the insertion portion 121I. In the example shown in FIGS. 5 to 7, the notch 121N widens outward from the base end to the tip end in a front view. The insertion portion 121I has shape elasticity that, when force is applied from the outside toward the notch 121N in a plan view, the insertion portion 121I deforms and closes the notch 121N, and returns to its original state when the force is removed.

[0030] The second conductive part 122 is a metal part that is electrically connected to another short-circuit device 120. The second conductive part 122 includes a base 122B, a first protrusion 122F, and a second protrusion 122R. The first protrusion 122F is a part that protrudes from the front surface 125F of the insulating housing 125. In the example shown in FIGS. 5 to 9, the first protrusion 122F protrudes in a direction perpendicular to the front surface 125F of the insulating housing 125. The second protrusion 122R is a part that protrudes from the rear surface 125R of the insulating housing 125. In the example shown in FIGS. 5 to 9, the second protrusion 122R protrudes in a direction perpendicular to the rear surface 125R of the insulating housing 125.

[0031] When the terminal blocks 110 are connected to each other with the short-circuiting devices 120 attached to the terminal blocks 110, the front surface 125F of the insulating housing 125 faces the back surface 125R of the other short-circuiting device 120 adjacent to the front side. A first hole 125H1 is formed in the front surface 125F of the insulating housing 125, into which the second protrusion 122R of the other short-circuiting device 120 can be inserted. The first hole 125H1 is formed in a position facing the second protrusion 122R of the other short-circuiting device 120 when the terminal blocks 110 are connected to each other with the short-circuiting devices 120 attached to the terminal blocks 110.

[0032] When the terminal blocks 110 are connected to each other with the short-circuit devices 120 attached to the terminal blocks 110, the rear surface 125R of the insulating housing 125 faces the front surface 125F of the other short-circuit device 120 adjacent to the rear surface side. A second hole 125H2 is formed in the rear surface 125R of the insulating housing 125, into which the first protrusion 122F of the other short-circuit device 120 can be inserted. The second hole 125H2 is formed in a position facing the first protrusion 122F of the other short-circuit device 120 when the terminal blocks 110 are connected to each other with the short-circuit devices 120 attached to the terminal blocks 110.

[0033] When inserted into the second hole 125H2 of another adjacent short-circuit device 120 on the front side, the first protrusion 122F of the second conductive part 122 abuts against the base 122B of the second conductive part 122 of the other adjacent short-circuit device 120 on the front side. Similarly, when inserted into the first hole 125H1 of the other adjacent short-circuit device 120 on the rear side, the second protrusion 122R of the second conductive part 122 abuts against the base 122B of the second conductive part 122 of the other adjacent short-circuit device 120 on the rear side. In this way, the second conductive part 122 is electrically connected to the second conductive part 122 of the other adjacent short-circuit device 120.

[0034] The terminal block unit 100 can be used with a variety of short-circuit devices 120 having different internal configurations depending on the purpose.

[0035] FIG. 10 is a front view showing an example of the internal configuration of a first short-circuit device 120A, which is the short-circuit device 120 of the first embodiment.

[0036] The first short-circuiting device 120A is used when short-circuiting the terminal block 110 to which the first short-circuiting device 120A is attached with another terminal block 110.

[0037] The first short-circuit device 120A includes a third conductive part 123. The third conductive part 123 is a metal part that electrically connects the first conductive part 121 and the second conductive part 122. The third conductive part 123 is connected to the first conductive part 121 and the second conductive part 122. In the example shown in FIG. 10, the third conductive part 123 is a rod-shaped part. In the example shown in FIG. 10, one end of the third conductive part 123 is connected to an upper part of the first conductive part 121. In the example shown in FIG. 10, the other end of the third conductive part 123 is connected to a lower part of the second conductive part 122.

[0038] FIG. 11 is a front view showing an example of the internal configuration of a second short-circuit device 120B which is the short-circuit device 120 of the second embodiment.

[0039] The second short-circuiting device 120B is used for the purpose of providing electrical resistance when the terminal block 110 to which the second short-circuiting device 120B is attached is short-circuited with another terminal block 110.

[0040] The second short-circuiting device 120B includes a resistor 124. The resistor 124 is a component that limits current and causes a voltage drop according to Ohm's law when a voltage is applied to both ends of an electronic circuit, and is used for voltage division, current limiting, rectification, etc. The resistor 124 is connected to the first conductive portion 121 and the second conductive portion 122. In the example shown in FIG. 11, one end of the resistor 124 is connected to the upper part of the first conductive portion 121. In the example shown in FIG. 11, the other end of the resistor 124 is connected to the lower part of the second conductive portion 122.

[0041] FIG. 12 is a front view showing an example of the internal configuration of a third short-circuit device 120C, which is a short-circuit device 120 of the third embodiment.

[0042] The third short-circuiting device 120C is used when the terminal block 110 to which the third short-circuiting device 120C is attached is not short-circuited with other terminal blocks 110.

[0043] In the third short-circuit device 120C, the first conductive part 121 and the second conductive part 122 are not electrically connected to each other.

[0044] 13 to 15 are front views showing an example of a procedure for attaching the short-circuiting device 120 to the terminal block 110. FIG.

[0045] First, as shown in Figure 13, the worker pushes the short-circuiting device 120 between the first wall portion 113A and the second wall portion 113B of the insulating part 113 of the terminal block 110 with the insertion portion 121I of the first conductive part 121 of the short-circuiting device 120 facing downward.

[0046] Next, as shown in Fig. 14, the worker inserts the insertion portion 121I of the first conductive portion 121 of the short-circuiting device 120 into the opening 111O formed in the conductive portion 111 of the terminal block 110. As described above, the insertion portion 121I has shape elasticity such that when force is applied from the outside toward the notch 121N in a plan view, the insertion portion 121I is deformed to close the notch 121N. When inserted into the opening 111O, the insertion portion 121I abuts against the conductive portion 111, and a force is applied from the outside toward the notch 121N. Therefore, when the insertion portion 121I is inserted into the opening 111O, the shape elasticity causes the insertion portion 121I to deform and close the notch 121N.

[0047] Next, as shown in FIG. 15 , the worker pushes the short-circuiting device 120 in until the bottom surface of the insulating housing 125 of the short-circuiting device 120 contacts the conductive portion 111 of the terminal block 110. As described above, the insertion portion 121I has a tapered shape that widens outward from the base to the tip in a front view. Also, as described above, the insertion portion 121I has shape elasticity that causes it to return to its original state when a force applied from the outside to the cutout 121N side is removed in a plan view. Because the insertion portion 121I has a tapered shape, the force applied to the insertion portion 121I decreases as the insertion portion 121I is pushed into the opening 111O. Therefore, the insertion portion 121I returns to its original state due to shape elasticity as it is pushed into the opening 111O. Furthermore, because the insertion portion 121I has a tapered shape, the short-circuiting device 120 is prevented from easily coming out of the opening 111O.

[0048] FIG. 16 is a perspective view showing an example of a method for connecting terminal blocks 110 to which short-circuiting devices 120 are attached, and an example of a method for connecting terminal blocks 110 to which short-circuiting devices 120 are attached and an end plate EP.

[0049] The example shown in FIG. 16 shows a method of connecting the first terminal block 110A and the second terminal block 110B, and a method of connecting the first terminal block 110A and the end plate EP.

[0050] The first protrusion 122F of the second conductive part 122 of one short-circuiting device 120 is inserted into the second hole 125H2 formed in the rear surface 125R of the insulating housing 125 of another short-circuiting device 120 adjacent to the front side. In the example shown in Fig. 16, the first protrusion 122F of the short-circuiting device 120 attached to the first terminal block 110A is inserted into the second hole 125H2 formed in the insulating housing 125 of the short-circuiting device 120 attached to the second terminal block 110B.

[0051] The second protrusion 122R of the second conductive part 122 of one short-circuiting device 120 is inserted into a first hole 125H1 formed in the front surface 125F of the insulating housing 125 of another short-circuiting device 120 adjacent to the rear surface side. In the example shown in Fig. 16, the second protrusion 122R of the short-circuiting device 120 attached to the second terminal block 110B is inserted into the first hole 125H1 formed in the insulating housing 125 of the short-circuiting device 120 attached to the first terminal block 110A.

[0052] A hole EPH is formed in the main surface of the end plate EP, into which the first protrusion 122F or the second protrusion 122R of the second conductive part 122 of the short-circuiting device 120 can be inserted. The hole EPH is formed in a position facing the first protrusion 122F or the second protrusion 122R of the short-circuiting device 120 when the terminal block 110 and the end plate EP are connected in a state in which the short-circuiting device 120 is attached to the terminal block 110.

[0053] The first protrusion 122F or the second protrusion 122R of the short-circuiting device 120 attached to the outermost terminal block 110 among the multiple terminal blocks 110 connected to each other is inserted into a hole EPH formed in the main surface of the end plate EP. In the example shown in Fig. 16, the second protrusion 122R of the short-circuiting device 120 attached to the first terminal block 110A is inserted into a hole EPH formed in the main surface of the end plate EP. By connecting the short-circuiting device 120 attached to the outermost terminal block 110 to the end plate EP, the connected short-circuiting devices 120 are prevented from easily coming off the terminal blocks 110.

[0054] FIG. 17 is a circuit diagram showing an example of a countermeasure against a minute load current.

[0055] The circuit shown in Figure 17 is an external circuit in which a direct current power supply DC and a contact CT are connected in series to a sequencer S1, and a resistor R1 is connected in parallel to the contact CT as a countermeasure for minute load currents, intentionally increasing the current passing through the contact CT.

[0056] FIG. 18 is a diagram showing an example of how to use the short-circuiting device 120 when taking measures against the minute load current shown in FIG. 17 using the terminal block unit 100. In FIG.

[0057] In the example shown in FIG. 18, the terminal block unit 100 includes five terminal blocks 110: a first terminal block 110A, a second terminal block 110B, a third terminal block 110C, a fourth terminal block 110D, and a fifth terminal block 110E.

[0058] One terminal of the sequencer S1 is connected to the first fastener 112A of the fifth terminal block 110E. The other terminal of the sequencer S1 is connected to the negative terminal of the direct current power supply DC. The positive terminal of the direct current power supply DC is connected to the first fastener 112A of the first terminal block 110A. One terminal of the contact CT is connected to the second fastener 112B of the first terminal block 110A. The other terminal of the contact CT is connected to the second fastener 112B of the fifth terminal block 110E.

[0059] The circuit formed via the first terminal block 110A and the fifth terminal block 110E is an external circuit in which a direct current power supply DC and a contact CT are connected in series to the sequencer S1 shown in FIG.

[0060] A short-circuiting device 120 is attached to each of the first terminal block 110A, the second terminal block 110B, the third terminal block 110C, the fourth terminal block 110D, and the fifth terminal block 110E. As described above, the second conductive part 122 of one short-circuiting device 120 is electrically connected to the second conductive part 122 of another adjacent short-circuiting device 120. Therefore, the short-circuiting devices 120 attached to the first terminal block 110A, the second terminal block 110B, the third terminal block 110C, the fourth terminal block 110D, and the fifth terminal block 110E are electrically connected to each other.

[0061] A third short-circuiting device 120C is attached to the first terminal block 110A, the third terminal block 110C, and the fourth terminal block 110D. As described above, the third short-circuiting device 120C is used when the terminal block 110 to which the third short-circuiting device 120C is attached is not short-circuited with the other terminal blocks 110. Therefore, the first terminal block 110A is not short-circuited with the second terminal block 110B, the third terminal block 110C, the fourth terminal block 110D, and the fifth terminal block 110E. Similarly, the third terminal block 110C is not short-circuited with the first terminal block 110A, the second terminal block 110B, the fourth terminal block 110D, and the fifth terminal block 110E. Similarly, the fourth terminal block 110D is not short-circuited with the first terminal block 110A, the second terminal block 110B, the third terminal block 110C, and the fifth terminal block 110E.

[0062] A first short-circuiting device 120A is attached to the second terminal block 110B. As described above, the first short-circuiting device 120A is used when short-circuiting the terminal block 110 to which the first short-circuiting device 120A is attached with another terminal block 110. A second short-circuiting device 120B is attached to the fifth terminal block 110E. As described above, the second short-circuiting device 120B is used to obtain electrical resistance when short-circuiting the terminal block 110 to which the second short-circuiting device 120B is attached with another terminal block 110. Therefore, the second terminal block 110B and the fifth terminal block 110E are short-circuited via the short-circuiting devices 120 attached to the second terminal block 110B, the third terminal block 110C, the fourth terminal block 110D, and the fifth terminal block 110E.

[0063] The negative terminal of the direct current power supply DC is also connected to the first fastener 112A of the second terminal block 110B.

[0064] The path that short-circuits the second terminal block 110B, to which electrical resistance is applied by the second short-circuiting device 120B, and the fifth terminal block 110E is a path that connects the resistor R1 shown in FIG. 17 in parallel to the contact CT.

[0065] In this way, the terminal block unit 100 can be used as shown in FIG. 18 to realize the countermeasure against minute load currents shown in FIG.

[0066] As described above, the short-circuiting device 120 of the embodiment is a device for short-circuiting multiple terminal blocks 110. The short-circuiting device 120 has a first conductive part 121 electrically connected to the conductive part 111 of the terminal block 110. The short-circuiting device 120 has a second conductive part 122 electrically connected to another short-circuiting device 120. The second conductive part 122 is electrically connected to the second conductive part 122 of the other short-circuiting device 120.

[0067] The short-circuiting device 120 of this embodiment contributes to countering minute load currents even when it is adopted after the panel has been manufactured, without causing problems such as design changes, arranging for equipment, or securing personnel for modifications.

[0068] The first short-circuit device 120A of the embodiment includes a third conductive part 123 that electrically connects the first conductive part 121 and the second conductive part 122.

[0069] The first short-circuiting device 120A of this embodiment can short-circuit the terminal block 110 to which the first short-circuiting device 120A is attached with another terminal block 110.

[0070] The second short-circuit device 120B of the embodiment includes a resistor 124 that electrically connects the first conductive part 121 and the second conductive part 122.

[0071] The second short-circuiting device 120B of this embodiment can provide electrical resistance when the terminal block 110 to which the second short-circuiting device 120B is attached is short-circuited with another terminal block 110.

[0072] In the third short-circuit device 120C of this embodiment, the first conductive part 121 and the second conductive part 122 are not electrically connected.

[0073] The third short-circuiting device 120C of this embodiment can prevent the terminal block 110 to which the third short-circuiting device 120C is attached from being short-circuited with other terminal blocks 110.

[0074] The second conductive portion 122 of the embodiment can be connected to an end plate EP that holds the terminal block 110.

[0075] The short-circuiting device 120 of this embodiment can prevent the short-circuiting devices 120 connected to each other from easily coming off the terminal block 110.

[0076] In this embodiment, the first conductive portion 121 and the second conductive portion 122 are provided in an insulating housing 125. A front surface 125F of the insulating housing 125 faces a rear surface 125R of another adjacent short-circuit device 120 on the front side. A rear surface 125R of the insulating housing 125 faces a front surface 125F of another adjacent short-circuit device 120 on the rear side. The second conductive portion 122 has a first protrusion 122F that protrudes from the front surface 125F of the insulating housing 125. The second conductive portion 122 has a second protrusion 122R that protrudes from the rear surface 125R of the insulating housing 125. A first hole 125H1 is formed in the front surface 125F of the insulating housing 125, into which the second protrusion 122R of the other short-circuit device 120 can be inserted. A second hole 125H2 is formed in the rear surface 125R of the insulating housing 125, into which the first protrusion 122F of the other short-circuit device 120 can be inserted. The second conductive portions 122 of adjacent short-circuit devices 120 are electrically connected to each other by the first protrusions 122F and the second protrusions 122R.

[0077] The short-circuit device 120 of this embodiment can prevent the short-circuit devices 120 connected to each other from rotating along a vertical plane.

[0078] The terminal block unit 100 of the embodiment is a unit for electrical connection. The terminal block unit 100 includes a plurality of terminal blocks 110. The terminal block unit 100 includes a plurality of short-circuiting devices 120 for short-circuiting the plurality of terminal blocks 110. The terminal block 110 includes a conductive portion 111. The terminal block 110 includes a plurality of fasteners 112 fixed to the conductive portion 111. The short-circuiting device 120 includes a first conductive portion 121 electrically connected to the conductive portion 111 of the terminal block 110. The short-circuiting device 120 includes a second conductive portion 122 electrically connected to another short-circuiting device 120. The second conductive portion 122 is electrically connected to the second conductive portion 122 of the other short-circuiting device 120.

[0079] Although the present invention has been described above using embodiments, the technical scope of the present invention is not limited to the scope described in the embodiments. It will be apparent to those skilled in the art that various modifications and improvements can be made to the embodiments. It is clear from the claims that such modifications and improvements can also be included within the technical scope of the present invention.

[0080] FIG. 19 is a front view showing another example of the short-circuit device 120. As shown in FIG.

[0081] 19, first conductive part 121 of short-circuiting device 120 includes spring part 121S instead of insertion part 121I in the previously described example. Spring part 121S is a mechanical element designed to store energy when deflected and to return the internally stored energy when the deflection is released. Spring part 121S is designed so that the restoring force of spring part 121S is equal to the gravity of short-circuiting device 120, so that short-circuiting device 120 keeps spring part 121S parallel when compressed.

[0082] 20 and 21 are front views showing an example of a procedure for attaching the short-circuit device 120 of the other example shown in FIG. 19 to the terminal block 110. FIG.

[0083] First, as shown in Figure 20, the worker pushes the short-circuiting device 120 between the first wall portion 113A and the second wall portion 113B of the insulating part 113 of the terminal block 110 with the spring portion 121S of the first conductive portion 121 of the short-circuiting device 120 facing downward.

[0084] Next, as shown in FIG. 21 , the worker presses the spring portion 121S against the conductive portion 111 of the terminal block 110 and pushes the short-circuiting device 120 in until the spring portion 121S is sufficiently compressed. As described above, the spring portion 121S is designed so that the restoring force of the spring portion 121S is equal to the gravity of the short-circuiting device 120, so that the short-circuiting device 120 maintains the parallel position when the spring portion 121S is compressed. Therefore, the short-circuiting device 120 is held in a position where the spring portion 121S is sufficiently compressed. When using another example of the short-circuiting device 120 shown in FIG. 19 , the conductive portion 111 of the terminal block 110 does not need to have the opening 111O formed therein. [Explanation of symbols]

[0085] 100 Terminal block unit 110 Terminal block 110A 1st terminal block 110B 2nd terminal block 110C 3rd terminal block 110D 4th terminal block 110E 5th terminal block 111 Conductive part 111O opening 112 Fasteners 112A 1st fastener 112B 2nd fastener 113 Insulating parts 113A 1st wall section 113B 2nd wall section 113C 3rd wall section 120 Short-circuiting device 120A No. 1 Short Circuit Device 120B Second Short Circuit Device 120C 3rd Short Circuit Device 121 First conductive part 121I insertion section 121S spring part 122 Second conductive part 122B base 122F 1st protrusion 122R 2nd protrusion 123 Third conductive part 124 resistor 125 Insulated housing 125F front 125H1 1st hole 125H2 2nd hole 125R back CT contact DC DC power supply EP End Plate EPH hole R1 Resistor S1 Sequencer SM support

Claims

1. A short-circuiting device for short-circuiting multiple terminal blocks, a first conductive portion electrically connected to the conductive portion of the terminal block; a second conductive portion electrically connected to another short-circuiting device, The second conductive portion is electrically connected to the second conductive portion of another short-circuiting device.

2. The short-circuit device according to claim 1 , further comprising a third conductive portion that electrically connects the first conductive portion and the second conductive portion.

3. The short-circuiting device according to claim 1 , further comprising a resistor electrically connecting the first conductive portion and the second conductive portion.

4. The short-circuit device according to claim 1 , wherein the first conductive portion and the second conductive portion are not electrically connected.

5. The short-circuiting device according to claim 1 , wherein the second conductive portion is connectable to an end plate that holds the terminal block.

6. the first conductive portion and the second conductive portion are provided in an insulating housing, The front surface of the insulating housing faces the rear surface of another adjacent short-circuiting device on the front side, The rear surface of the insulating housing faces the front surface of another adjacent short-circuiting device on the rear side, The second conductive portion is a first protrusion protruding from a front surface of the insulating housing; a second protrusion protruding from the rear surface of the insulating housing, a first hole into which the second protrusion of another short-circuiting device can be inserted is formed on the front surface of the insulating housing; a second hole portion into which the first protrusion portion of another short-circuiting device can be inserted is formed on the rear surface of the insulating housing; The short-circuit device according to claim 1 , wherein the second conductive portions of adjacent short-circuit devices are electrically connected to each other by the first protrusion and the second protrusion.

7. A terminal block unit for electrical connection, A plurality of terminal blocks; a plurality of short-circuiting devices for short-circuiting the plurality of terminal blocks, The terminal block is A conductive portion; a plurality of fasteners fixed to the conductive portion, The short-circuit device is a first conductive portion electrically connected to the conductive portion of the terminal block; a second conductive portion electrically connected to the other short-circuiting device, A terminal block unit, wherein the second conductive portion is electrically connected to the second conductive portion of another short-circuiting device.

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