JP2009158259A - Attaching structure of copper bar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an attaching structure of a copper bar in which the copper bar can be attached to and detached from a terminal table without removing a screw. <P>SOLUTION: The attaching structure of a copper bar is constructed of a copper bar attaching tool of which the lower axis portion is adhered to a terminal table and the upper head portion is arranged on the terminal table, a copper bar which has an attaching hole into which the head portion of the copper bar attaching tool can be inserted, and a tapping screw of which screw head is smaller in diameter than the attaching hole and screw axis portion is formed in taper shape becoming gradually smaller in diameter toward the top end side. The head portion of the copper bar attaching tool is formed in taper shape with the outer periphery gradually becoming wider downward, and has a taper hole for screwing formed becoming smaller in diameter from the center upper part to the downward, and a plurality of slits communicating with the taper hole are formed in vertical direction, and a flange with a smaller diameter than the attaching hole is formed at the upper part to form the outer shape. Accompanied with screwing of the tapping screw into the taper hole, the upper side of the head portion becomes wider in diameter and pressure contacts the inner periphery of the attaching hole, and the flange is locked to the opening periphery of the attaching hole to fix the copper bar to the terminal table. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a copper bar (bus bar) mounting structure, and more particularly to a copper bar mounting structure in which a copper bar can be easily attached to and detached from a terminal block through which a large current is passed.

  As disclosed in Patent Document 1 or Patent Document 2, today, a copper bar is used to achieve space saving that eliminates the need for wiring through which a large current flows, a wire harness, and the like from the viewpoint of improving connection reliability. Widely used as wiring.

  The conventional example of Patent Document 1 uses a copper bar to increase an allowable current value, reduce a voltage drop, and improve heat dissipation in a large-sized computer that requires a large current supply such as a power supply mechanism. In the conventional example of Patent Document 2, with the progress of electronic control of automobile parts, wiring parts of automobile control parts are made into a batch module, and copper bars are used to save installation space. It is.

Conventionally, when a copper bar is attached to a terminal block of a power supply device for energizing a large current, the screw of the terminal block is once removed and the screw is retightened to fix the copper bar to the terminal block.
JP 63-182897 A JP-A-8-268254

  However, the work of removing the screws of the terminal block when mounting the copper bar is troublesome and the workability is poor. Also, if you remove the screw from the terminal block in this way, the screw may drop, and in the case of a copper bar that connects several terminal blocks, all the screws will be removed once, so you lose the screws. There was also a risk of it.

  And when tightening the terminal block screws, there is a lot of screwing rotation up to the specified torque, and even when replacing the copper bar, all the screws on the terminal block must be removed and retightened again. The actual situation was that it took a lot of work.

  The present invention has been devised in view of such circumstances, and an object of the present invention is to provide a copper bar mounting structure in which a copper bar can be easily attached to and detached from a terminal block without removing screws.

  In order to achieve such an object, the invention according to claim 1 is directed to a copper bar fixture in which a lower shaft portion is fixed to a terminal block and an upper head portion is disposed on the terminal block, and the copper bar fixture. A copper bar provided with a mounting hole through which the head of the screw can be inserted, and a tapping screw formed in a tapered shape with a screw head having a small diameter from the mounting hole and a screw shaft portion having a small diameter sequentially toward the tip side, The head of the copper bar fitting is formed in a tapered shape whose outer circumference is gradually expanded downward, and a taper hole for screw tightening having a small diameter is formed sequentially from the upper center to the lower side, and is communicated with the tapered hole. A plurality of slits are formed in a vertical direction, and a flange having a smaller diameter than the mounting hole is formed on the upper portion, and the upper side of the head is enlarged as the tapping screw is screwed into the tapered hole. And press-fitted to the inner periphery of the mounting hole. There wherein the securing the terminal block copper bar engaged with the opening edge of the mounting hole.

  According to a second aspect of the present invention, in the copper bar mounting structure according to the first aspect, the tapping screw is provided with a plurality of types having different taper angles of the screw shaft portion. The invention according to claim 3 is the copper bar mounting structure according to claim 1 or 2, wherein the lower shaft portion of the copper bar mounting tool is knurled on the outer periphery. It is characterized by.

  According to a fourth aspect of the present invention, in the copper bar mounting structure according to any one of the first to third aspects, the tip of the shaft portion of the copper bar mounting tool is on the back side of the terminal block. The invention according to claim 5 is characterized in that the copper bar mounting structure according to any one of claims 1 to 3, wherein a female screw is threaded at the tip. The tip of the shaft portion of the copper bar fixture protrudes from the back side of the terminal block, and a male screw is threaded on the tip.

  Furthermore, the invention according to claim 6 is the copper bar mounting structure according to any one of claims 1 to 3, wherein the copper bar mounting tool is provided on the substrate at the tip of the shaft portion. A mounting pin for mounting that can be mounted in the mounting hole is provided, and the invention according to claim 7 is the copper bar mounting structure according to any one of claims 1 to 3. The copper bar fitting is characterized in that the heads are formed on both sides of the shaft part.

  Furthermore, the invention according to claim 8 is the copper bar mounting structure according to any one of claims 1 to 7, wherein the copper bar is provided at an opening peripheral portion of the mounting hole of the copper bar. A peripheral groove is formed in which the flange of the fixture is flush with the copper bar.

  According to the invention according to each claim, it is not necessary to remove the screw from the terminal block when the copper bar is attached to the terminal block, and the screw is slightly loosened when replacing the copper bar attached to the terminal block. Since the copper bar can be removed, the workability of attaching / removing the copper bar is remarkably improved as compared with the conventional case, and the falling or losing of the screw can be prevented.

  Also, since the head of the copper bar mounting tool is tapered, it is easy to insert the head into the mounting hole of the copper bar when mounting the copper bar, and the screw shaft of the tapping screw is gradually reduced in diameter toward the tip side. Since it is formed in a tapered shape, it is possible to reduce the screw tightening work when screwing the tapping screw into the taper hole, and it is possible to widen the surface contact portion of the head pressed against the inner periphery of the mounting hole Thus, there is an advantage that good electrical conductivity can be secured.

  Furthermore, according to the invention which concerns on Claim 1, it is not necessary to cut a tap in the attachment hole of a copper bar, and there exists an advantage which only needs to drill the attachment hole in a copper bar.

  According to the second aspect of the present invention, it is possible to adjust the tightening strength of the copper bar by preparing tapping screws having different taper angles of the screw shaft portions according to the specifications.

  Further, according to the invention according to claim 3, since the knurling process is performed on the outer periphery of the shaft portion, the copper bar fitting does not rotate when the taper hole is tightened by the tapping screw. The rotation is stopped.

  On the other hand, according to the invention concerning Claim 4 and Claim 5, the connection using a screw | thread, a crimp terminal, and a nut is attained in the back surface side of a terminal block.

  And according to the invention concerning Claim 6, it becomes possible to apply also to attachment of the copper bar to the terminal block mounted on a printed circuit board.

  According to the invention of claim 7, wiring using a copper bar is possible on the back side of the terminal block, and the workability is further improved. Since it is flush with the surface of the copper bar and is locked to the peripheral groove, there is an advantage that a finger or the like is not caught on the flange, and the protrusion of the metal part from the terminal block can be eliminated. .

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 to 12 show a first embodiment of a copper bar mounting structure according to claims 1 to 5 and claim 8, wherein in FIG. 1, 1 is a terminal attached to a power supply device (not shown). This embodiment relates to a copper bar mounting structure for connecting a plurality of power supply device terminal blocks with a plurality of copper bars. The present embodiment will be described based on one terminal block 1.

  The terminal block 1 is a resin molded product, and two copper bar mounting portions 5 are defined by three partition walls 3 on the upper portion of the terminal block 1, and a copper bar mounting portion 7 is provided on one copper bar mounting portion 5. The shaft portion 9 is fixed (molded), and the shaft portion 13 of another type of copper bar mounting tool 11 is fixed (molded) to the other copper bar mounting portion 5.

  As shown in FIGS. 2 and 3, the copper bar fitting 7 is composed of a round bar-shaped shaft portion 9 made of a metal material such as phosphor bronze or brass having electrical conductivity and spring properties, The head portion 15 is formed integrally with the upper portion, and the shaft portion 9 has a knurled pattern 17 on the outer periphery of the shaft portion 9. And as shown in FIG. 1, the front-end | tip of the axial part 9 protrudes in the back surface side of the terminal block 1, and the internal thread 19 is screwed by this front-end | tip.

  As shown in FIGS. 2 to 4, the head portion 15 is formed as a tapered portion 15a having a tapered shape in which the outer circumference from the upper portion to approximately 2/3 is gradually expanded downward, and the upper portion of the head portion 15 is formed downward. A taper hole 21 for tightening a screw, which gradually becomes smaller in diameter, is provided. The head portion 15 below the tapered portion 15a is formed in a cylindrical shape.

  Further, four slits 23 communicating with the taper hole 21 are formed in the up and down direction in the taper portion 15a of the head portion 15 with an interval of 90 °, and a copper (described later) is formed above the taper portion 15a. A flange 29 having a circular shape in plan view that engages with the peripheral groove 27 of the bar 25 protrudes outward in the radial dimension, and the shaft portion 9 is fixed to the terminal block 1 as shown in FIG. Is disposed on the copper bar mounting portion 5.

  On the other hand, as shown in FIG. 1, the other copper bar fixture 11 has a shaft portion 13 which is longer than the copper bar fixture 7, and protrudes toward the back side of the terminal block 1. The head 15 formed integrally with the upper portion of the shaft portion 13 has the same structure as the head 15 of the copper bar fixture 7.

  As with the copper bar fixture 7, the copper bar fixture 11 is formed of a conductive metal material such as phosphor bronze or brass. The outer periphery of the shaft portion 13 is also knurled with an iris pattern. The shaft portion 13 is fixed to the terminal block 1 and the head portion 15 is disposed on the copper bar mounting portion 5 as shown in FIG. Has been.

  As shown in FIGS. 5 and 6, the copper bar 25 attached to the copper bar mounting portion 5 has a circular mounting hole 33 in a plan view through which the head 15 of the copper bar mounting tools 7 and 11 can be inserted. Furthermore, a ring-shaped peripheral groove 27 in plan view is provided at the opening peripheral portion of the mounting hole 33 on the surface side of the copper bar 25 so that the flange 29 can be flush with the surface of the copper bar 25. It has been.

  FIG. 7 shows a tapping screw 37 that is screwed into the taper hole 21 of the copper bar fittings 7, 11. In this embodiment, a Nabeco screw having a pan head 35 is used as the tapping screw 37. The screw shaft portion 39 is set to have a slightly larger taper angle than the tapered hole 21.

  Then, as shown in FIGS. 8 to 11, when the taper hole 21 is tightened with the tapping screw 37, the taper portion 15a of the head portion 15 provided with the slit 23 is sequentially deformed radially outward. The outer shape expands (expands). Then, as shown in FIG. 12, when the tapping screw 37 is completely screwed into the taper hole 21, the outer periphery of the taper portion 15a deformed radially outward becomes straight, and the outer periphery of the entire head 15 is attached to the mounting hole. The flange 29 is in contact with the inner periphery of the copper bar 25 and is flush with the surface of the copper bar 25 to be engaged with the peripheral groove 27.

  2, 5, and 7, the diameters a, b, and c of the mounting hole 33, the flange 29, and the screw head 35 are set in a relationship of a> b ≧ c. The diameter dimension b of the flange 29 is a diameter dimension in a state shown in FIG. 8 described later before screwing with the tapping screw 37. Further, as shown in FIG. 8, the outer diameter of the cylindrical head portion 15 formed below the tapered portion 15a is set slightly smaller than the inner diameter of the mounting hole 33, and as described above, the tapered hole is formed. When the tapping screw 37 is completely screwed to 21, the outer periphery of the taper portion 15 a deformed radially outward becomes straight, and the outer periphery of the entire head 15 is pressed against the inner periphery of the mounting hole 33.

  In addition, in FIG. 1, 41 is an attachment hole of the terminal block 1 to a power supply device.

  The present embodiment is configured as described above. Next, a method of attaching the copper bar 25 to the terminal block 1 using the copper bar fixtures 7 and 11 and the tapping screw 37 based on FIGS. Will be explained.

  First, in attaching the copper bar 25 to the terminal block 1, as shown in FIGS. 1 and 8, the shaft portion 9 of the copper bar fixture 7 is fixed to one copper bar mounting portion 5 on the upper side of the terminal block 1, and the other side. The shaft portion 13 of the copper bar fixture 11 is fixed to the copper bar fixture 5, and the heads 15 of the copper bar fixtures 7 and 11 are arranged on the copper bar fixture 5, respectively.

  The terminal block 1 is fixed to the power supply device, and a screw 43 is screwed onto the female screw 19 of the copper bar fitting 7 projecting from the back side of the terminal block 1 so that the crimp terminal 45 is connected. A crimping terminal 45 is connected by screwing a nut 47 to the male screw 31 of the other copper bar fitting 11 protruding to the back surface side of 1.

  Thus, in this state, as shown in FIGS. 8 and 9, the heads 15 of the copper bar fittings 7 and 11 are inserted into the attachment holes 33 of the copper bar 25, and the copper bar 25 is attached to the copper bar. It arranges in the part 5. As described above, the diameters a and b of the mounting hole 33 and the flange 29 are in the relationship of a> b. Therefore, the head 15 can be easily inserted into the mounting hole 33, and the flange 29 is inserted into the mounting hole 33. It won't get caught.

  Thereafter, as shown in FIGS. 9 to 11, when the tapping screw 37 is inserted into the taper hole 21 of the head 15 of the copper bar fittings 7 and 11 and the taper hole 21 is tightened, the slit 23 The taper portion 15a of the head portion 15 provided with is deformed sequentially outward in the radial direction and the outer shape expands.

  Thus, the outer peripheries of the shaft portions 9 and 13 are knurled, so that the copper bar fittings 7 and 11 do not rotate when the taper hole 21 is tightened with the tapping screw 37. The rotation is stopped.

  Then, as shown in FIG. 12, when the tapping screw 37 is completely screwed into the tapered hole 21, the outer periphery of the taper portion 15a deformed radially outward becomes a straight shape, and the outer periphery of the entire head 15 is attached to the mounting hole. The flange 29 is flush with the surface of the copper bar 25 and is locked to the peripheral groove 27, so that the copper bar 25 is secured to the terminal block 1.

  In the above mounting method, after the copper bar 25 is disposed in the copper bar mounting portion 5, the tapping screw 37 is inserted into the taper hole 21 and the taper hole 21 is tightened. 33, the flange 29, and the screw head 35 have diameters a, b, and c in a relationship of a> b ≧ c. Therefore, before placing the copper bar 25 in the copper bar mounting portion 5, The taper hole 21 is lightly screwed with the tapping screw 37 to such an extent that the placement of the copper bar 25 is not hindered, that is, the flange 29 is widened and is not caught in the mounting hole 33. The taper hole 21 may be temporarily fixed, and after the copper bar 25 is disposed in the copper bar mounting portion 5, the tapping screw 37 may be completely screwed to the taper hole 21 as shown in FIG.

  Since the screw shaft portion 39 of the tapping screw 37 is set to have a slightly larger taper angle than the taper hole 21, the screw tightening work when the tapping screw 37 is screwed into the taper hole 21 can be reduced. What is necessary is just to prepare the tapping screw from which the taper angle of a shaft part differs, and to adjust the fastening strength of a copper bar.

  On the other hand, when replacing the copper bar 25 attached to the terminal block 1, the tapping screw 37 is slightly loosened to release the engagement state between the flange 29 and the peripheral groove 27, and the copper bar 25 is removed to the extent that the copper bar 25 can be removed. The copper bar 25 may be removed by reducing the diameter of the wire 29, and there is no need to remove the tapping screw 37 from the tapered hole 21. And after arrange | positioning a new new copper bar in the copper bar attaching part 5 similarly, what is necessary is just to tighten the tapping screw 37 completely.

Thus, according to this embodiment,
[1] It is not necessary to remove the tapping screw 37 from the terminal block 1 when the copper bar 25 is attached to the terminal block 1, and the tapping screw 37 is also used when replacing the copper bar 25 attached to the terminal block 1. Since the copper bar 25 can be removed by loosening a little, the workability of attaching / removing the copper bar 25 is remarkably improved as compared with the conventional case, and the falling or losing of the screw can be prevented. Since the outer peripheries of the shaft portions 9 and 13 are knurled, the copper bar fittings 7 and 11 are not rotated when the taper hole 21 is tightened by the tapping screw 37, and Stop is planned.

[2] Since the head 15 of the copper bar fittings 7 and 11 is tapered, when the copper bar 25 is attached, the head 15 can be easily inserted into the attachment hole 33 of the copper bar 25.
[3] When the tapping screw 37 is completely screwed into the tapered hole 21, the outer periphery of the tapered portion 15 a deformed radially outward becomes a straight shape, and the entire head portion 15 is pressed against the inner periphery of the mounting hole 33. Therefore, the contact portion has a surface shape, and good electrical conduction can be ensured. And if the outer periphery of the head 15 is knurled, the electrical conductivity is further improved.

Furthermore,
[4] Since the screw shaft portion 39 of the tapping screw 37 is set to have a slightly larger taper angle than the taper hole 21, the screw tightening work when the tapping screw 37 is screwed into the taper hole 21 can be reduced. Accordingly, it is possible to adjust the tightening strength of the copper bar 25 by preparing tapping screws having different taper angles of the screw shaft portions, and by making the screw shaft portions 39 tapered in this manner, It is possible to widen the surface contact portion of the head 15 that is in pressure contact with the inner periphery, and this has the advantage of ensuring good electrical conductivity.

And
[5] In the conventional attachment of the copper bar to the terminal block, the tap must be cut in the attachment hole of the copper bar. However, according to the present embodiment, only the formation of the attachment hole 33 in the copper bar 25 is performed. Has the advantage of

Furthermore,
[6] As shown in FIG. 12, on the back side of the terminal block 1-2, connection using the screw 43, the crimp terminal 45, and the nut 47 using the copper bar fittings 7 and 11 becomes possible.

  In the above embodiment, the flange 29 is flush with the surface of the copper bar 25 and is locked to the peripheral groove 27. However, the peripheral groove 27 is omitted, and the opening peripheral portion of the mounting hole 33 is omitted. Alternatively, the flange 29 may be locked.

  FIG. 13 shows a second embodiment of the copper bar mounting structure according to claims 1 to 5 and claim 8. In this embodiment, instead of the tapping screw 37 using a pan-head screw, a countersunk screw is used as the tapping screw. 49 except that the taper hole 53 in which the screw head 51 fits is provided in the taper hole 21 of the head 15 of the copper bar fittings 7 and 11 is the same as that of the above embodiment. The same reference numerals are given to those and their description is omitted.

  Thus, according to the present embodiment, the intended purpose can be achieved as in the above-described embodiment. Of course, the tapping screw 49 is a flat head screw so that the flange 29 faces the surface of the copper bar 25. It becomes possible to flatten the upper surface of the copper bar 25 in combination with the locking to the peripheral groove 27, and it is possible to prevent injury by catching a finger or the like. Clearance can be ensured by eliminating protrusions.

  14 and 15 show the copper bar mounting structure according to the first embodiment of claims 1 to 3, 6, and 8, and this embodiment is a terminal mounted on a printed circuit board 55. The copper bar 25 can be attached to the base 1-1, and the bottom surface of the terminal base 1-1 is formed flat so that it can be mounted on the printed circuit board 55.

  The copper bar fittings 7-1 and 11-1 of this embodiment are provided on the printed circuit board 55 side at the tips of the shaft portions 9-1 and 13-1 instead of the female screw 19 and the male screw 31. A mounting rod 59 for mounting in a round bar shape that can be inserted into the mounting hole 57 having a circular shape in plan view is projected, and the terminal block 1-1 is mounted on the substrate 55 before mounting the copper bar 25 and mounted. The mounting pin 59 is inserted into the mounting hole 57 and soldered to the substrate 55 in advance. The other configuration is the same as that of the embodiment of FIG. 1, and a head portion 15 is formed on the upper portions of the shaft portions 9-1 and 13-1, and the same components are denoted by the same reference numerals and their description. Is omitted.

  Thus, the present embodiment can achieve the intended purpose as in the embodiment of FIG. 1, and the attachment of the copper bar 25 to the terminal block 1-1 mounted on the printed circuit board 55. It is also possible to apply to.

  FIGS. 16 and 17 show a copper bar mounting structure according to the second embodiment of claims 1 to 3, 6 and 8, and this embodiment is a mounting rod 59 for mounting in the form of a round bar. In place of this, mounting mounting pins 61 having a rectangular cross section project from the tips of the shaft portions 9-2 and 13-2 of the copper bar mounting tools 7-2 and 11-2, and the tips of the mounting mounting pins 61 are provided. Is provided with a small hole 63 for soldering and connecting a wire (not shown). As shown in FIG. 17, the mounting mounting pin 61 can be attached to the printed circuit board 55-2 side. A hole 65 is provided.

  The other configuration is the same as that of the embodiment of FIG. 1, and a head portion 15 is formed above the shaft portions 9-2 and 13-2, and this embodiment is similar to the embodiment of FIG. 14. It is possible to achieve the intended purpose.

  FIG. 18 shows a copper bar mounting structure according to one embodiment of claims 1 to 3, 7, and 8, and this embodiment is a shaft of copper bar mounting tools 7-3 and 11-3. 1 is formed on both sides of the portions 9-3 and 13-3, the upper part of the terminal block 1-2 is formed in the same structure as the terminal block 1 of FIG. 1, and the back surface of the terminal block 1-2. The side is also formed in the same structure as the upper part of the terminal block 1-2, and the copper bar 25 can be attached to the back side of the terminal block 1-2.

  Thus, according to the present embodiment, since wiring by the copper bar 25 is possible on the back side of the terminal block 1-2, the screw 43, the crimp terminal 45, and the nut 47 are used as shown in FIG. There is an advantage that the workability is further improved since the connection is unnecessary.

It is sectional drawing of the terminal block to which the copper bar fixture of the invention which concerns on 1st embodiment of Claim 1 thru | or Claim 5 and Claim 8 was fixed. It is a side view of a copper bar fixture. It is sectional drawing of a copper bar fixture. It is a top view of a copper bar fixture. It is a principal part top view of a copper bar. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. It is a side view of a tapping screw. It is explanatory drawing explaining the process of the copper bar attachment method to a terminal block. It is explanatory drawing explaining the process of the copper bar attachment method to a terminal block. It is explanatory drawing explaining the process of the copper bar attachment method to a terminal block. It is explanatory drawing explaining the process of the copper bar attachment method to a terminal block. It is principal part sectional drawing which shows the attachment structure of the copper bar to a terminal block. It is principal part sectional drawing which shows the attachment structure of the copper bar which concerns on 2nd embodiment of Claim 1 thru | or Claim 5 and Claim 8. It is principal part sectional drawing of the attachment structure of the copper bar which concerns on 1st embodiment of Claim 1 thru | or Claim 3, Claim 6, and Claim 8. It is a bottom view of the terminal block to which a copper bar fixture is attached. It is principal part sectional drawing of the attachment structure of the copper bar which concerns on 2nd embodiment of Claim 1 thru | or Claim 3, Claim 6, and Claim 8. It is a bottom view of the terminal block to which a copper bar fixture is attached. It is principal part sectional drawing of the attachment structure of the copper bar which concerns on one Embodiment of Claim 1 thru | or Claim 3, Claim 7, and Claim 8.

Explanation of symbols

1, 1-1, 1-2 Terminal block 3 Bulkhead 5 Copper bar mounting portion 7, 7-1, 7-2, 7-3, 11, 11-1, 11-2, 11-3 Copper bar mounting 9 , 9-1, 9-2, 9-3, 13, 13-1, 13-2, 13-3 Shaft portion 15 Copper bar fitting head 15 a Tapered portion 19 Female screw 21, 53 Tapered hole 23 Slit 25 Copper bar 27 Peripheral groove 29 Flange 31 Male screw 33, 57, 65 Mounting hole 35, 51 Screw head 37, 49 Tapping screw 39 Screw shaft portion 43 Screw 45 Crimp terminal 47 Nut 55 Printed circuit board 59, 61 Mounting pin for mounting

Claims (8)

A copper bar fixture in which a lower shaft portion is fixed to a terminal block and an upper head portion is disposed on the terminal block; and a copper bar provided with a mounting hole through which the head portion of the copper bar fixture can be inserted; ,
The screw head is smaller in diameter than the mounting hole, and the screw shaft portion is configured with a tapping screw formed in a tapered shape with a smaller diameter toward the tip side,
The head of the copper bar fitting is formed in a tapered shape whose outer circumference is gradually expanded downward, and a taper hole for screw tightening having a small diameter is formed sequentially from the upper center to the lower side, and is communicated with the tapered hole. A plurality of slits are formed in the vertical direction, and has an outer shape in which a flange having a smaller diameter than the mounting hole is formed at the top,
As the tapping screw is tightened into the taper hole, the upper side of the head expands in diameter and presses against the inner periphery of the mounting hole, and the flange engages with the peripheral edge of the opening of the mounting hole. A copper bar mounting structure characterized by fixing the bar to the terminal block.   2. The copper bar mounting structure according to claim 1, wherein a plurality of types of tapping screws having different taper angles of a screw shaft portion are prepared.   The copper bar mounting structure according to claim 1 or 2, wherein the lower shaft portion of the copper bar mounting tool is knurled on an outer periphery.   The tip end of the shaft portion of the copper bar fixture protrudes from the back side of the terminal block, and a female screw is threaded on the tip end. Copper bar mounting structure.   The tip end of the shaft portion of the copper bar fixture protrudes from the back side of the terminal block, and a male screw is threaded on the tip end. Copper bar mounting structure.   The mounting pin for mounting which can be attached to the attachment hole provided in the board | substrate is provided in the front-end | tip of the axial part of the said copper bar fixture, The Claim 1 thru | or 3 characterized by the above-mentioned. Copper bar mounting structure.   4. The copper bar mounting structure according to claim 1, wherein the head portion is formed on both sides of the shaft portion. 5. The peripheral edge groove | channel where the flange of the said copper bar fixture is latched flush with this copper bar is formed in the opening peripheral part of the attachment hole of the said copper bar, The Claim 1 thru | or 7 characterized by the above-mentioned. The copper bar mounting structure according to claim 1.

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