JP2019160745A - LED lighting device and manufacturing method thereof - Google Patents

Abstract

To provide an LED lighting device having a configuration of eliminating necessity for preparation of a large amount of stocks, and a manufacturing method thereof.SOLUTION: A cylindrical shape is formed with a metal base case 1, an insulating rail 2 fitted to the base case 1, a lamp substrate 3 held on the insulating rail 2, and a cover case 4 engaging with the base case 1 and covering the lamp substrate 3, and both ends of the formed cylindrical shape are closed with a pair of cap members 5 in a state of allowing the power cord to pass therethrough, and an internal housing member is fixed by screwing a fixing screw into a mounting hole formed by an inner wall of the base case 1 and an outer wall of the insulating rail 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a columnar LED lighting device that illuminates a merchandise display shelf and the like, and more particularly, to an invention that can quickly provide various LED lighting devices having different numbers of LEDs and different emission colors without having many types of inventory. .

  In recent years, the performance of LED lamps has been improved, and many LED lighting devices driven by AC 100 V have been proposed (Patent Documents 1 and 2), and are widely used as alternatives to fluorescent lamp lighting.

JP 2011-028946 A JP2011-138715A

  Here, assuming an LED lighting device arranged on a merchandise display shelf or the like, the required light source color of the LED lamp is required to be various white colors with slightly different shades corresponding to the exhibited product. In some cases, a light bulb color is required.

  Regarding the length of one LED lighting device, various lengths from about 340 mm to about 1640 mm are required in accordance with the size of the commodity display shelf. For this reason, in general, it is necessary to hold many kinds of LED lighting devices in a completed state as inventory, and management of optimal inventory has not been easy.

  In other words, it is very difficult to accurately predict the type of order product and the number of orders. Therefore, in order to avoid running out of stock, it is necessary to hold a large amount of excess inventory, and the inventory burden is large. There's a problem.

  This invention is made | formed in view of said subject, Comprising: It aims at providing the LED illuminating device which has the structure which does not need to have a large stock, and its manufacturing method.

  In order to solve the above problems, a manufacturing method according to the present invention includes a first step of cutting a semi-circular base case (1) into a length corresponding to the longitudinal dimension of the lamp substrate (3), and the base A second step of fitting the insulating rail (2) cut to a length corresponding to the longitudinal dimension of the case (1) to the base case (1), and the lamp substrate ( 3) fitting the base case (1) with a third step of fitting the base case (1), and a cover case (4) having a semicircular cross section cut to a length corresponding to the longitudinal dimension of the base case (1) In a state where the fourth step and the first step to the fourth step are performed in an appropriate order and finished in a cylindrical shape as a whole, the power cord connected to the lamp substrate (3) is passed through, A closing step of closing both ends of the columnar shape with the cap member (5); A fixing step of fixing each member housed in the cap member (5) by attaching a fixing screw from the outside of the cap member (5) after the closing step, and the lamp substrate (3) Is constructed by connecting one or more base substrates mounted with LED lamps and a power supply circuit in the longitudinal direction. In the closing step, the inner wall of the base case (1) and the insulating rail (2) The fixing screw is screwed into a mounting hole formed between the outer wall and the outer wall.

  Moreover, the LED lighting device according to the present invention includes a metal base case (1) having a semicircular cross section, an insulating rail (2) fitted to the inner surface of the base case (1), and an insulating rail (2). A cover case (4) having a semicircular cross section covering the lamp substrate by engaging the lamp substrate (3) held in a pair of slide grooves formed on the base plate and the open end of the base case (1). And both ends in the longitudinal direction of the columnar shape are closed by a pair of cap members in a state in which the power cord connected to the lamp substrate (3) is passed, Each member housed inside is fixed by screwing a fixing screw into a mounting hole formed between the inner wall of the base case (1) and the outer wall of the insulating rail (2). Features.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of an LED lighting apparatus and LED lighting apparatus which have a structure which does not need to have a large stock can be implement | achieved.

It is drawing explaining the structural member of the LED lighting apparatus which concerns on an Example. It is drawing which shows the LED lighting apparatus LGT of a completion state. 2 is a diagram illustrating a lamp substrate completed by connecting base substrates. It is a circuit diagram of 40 types of base substrates. It is a circuit diagram of 60 types of base substrates. It is drawing which shows the surface part and back surface part of a lamp board | substrate. It is drawing which shows the right-and-left end part and connection part of a lamp board | substrate. It is drawing which shows a cap member and an attachment screw. It is drawing which shows a base | substrate case, an insulation rail, and a cover case. It is drawing which shows the modification of an insulation rail.

  Hereinafter, the present invention will be described in detail with reference to examples. FIG. 1 is a perspective view and a cross-sectional view of the constituent members of the LED lighting device according to the embodiment. 2 is a drawing showing the LED lighting device LGT in a completed state, FIGS. 3 to 7 are drawings explaining the lamp substrate 3, and FIG. 8 is a drawing showing a cap member and mounting screws.

  As shown in FIG. 2, the LED lighting device LGT of the example as a whole has a cylindrical outline, and is made of a metal having a semicircular cross section as shown in the cross-sectional view of the main part in FIG. A base case 1, a plastic insulating rail 2 fitted to the inner surface of the base case 1, a lamp substrate 3 held by the insulating rail 2, and a plastic cover case 4 having a semicircular cross section. It is comprised. FIG. 9 shows the cover case 4 (a), the insulating rail 2 (b), and the base case 1 (c).

  The lamp substrate 3 is configured by connecting one or more base substrates BS (see FIG. 3). Each base substrate BS has a large number of LED lamps 31 on the surface side (upper side in FIG. 1). While being arranged in a line (FIG. 1 (g)), the main part of the power supply circuit is arranged on the back side thereof.

  The power supply circuit of the lamp substrate 3 is a circuit that receives commercial AC 100V and outputs a DC voltage, and includes a full-wave rectifying element BD and a plurality of capacitors C1 to C4 (see FIG. 4).

  In this embodiment, such a lamp substrate 3 is accommodated in the base case 1 while being held by the insulating rail 2. In this accommodated state, the cover case 4 is fitted to the base case 1 and the cap members 5 and 5 are fitted to both ends thereof so that the whole is integrated and a cylindrical shape is completed.

  As shown in FIG. 2, the power cords 6 and 6 connected to the lamp substrate 3 are pulled out through the cap member 5, and the AC cord 100V is fed to one power cord 6 while the other The power cord 6 is configured to output AC 100V (FIG. 3).

  Returning to FIG. 1, the description of the constituent members will be continued. The base case 1 is made of aluminum and is excellent in mechanical strength and heat resistance as compared with a plastic material. Therefore, even when both ends of a long lighting device LGT exceeding 1.5 m are supported, the central portion does not bend and the columnar shape can be maintained permanently.

  As shown in FIG. 1C, the base case 1 has three pairs of protrusions 11, 12, 13 extending in the longitudinal direction, which are a pair of left and right in a horizontal arrangement state. Here, the first ridge 11 is a portion that functions as a locking piece for fitting the cover case 4 to the base case 1, and the first ridge 11 and the second ridge 12 include the cover case 4. Is formed.

  Further, the second protrusion 12 and the third protrusion 13 form semicircular arc grooves 15, 15, which are attached to the mounting screws SC, SC ( It functions as a mounting hole for receiving (see FIG. 2B).

  In addition, the third protrusion 13 protrudes slightly from the constricted proximal end portion. Therefore, the engaging surface 16 that is the lower surface of the third protrusion 13 functions effectively as an application for locking the insulating rail 2.

  Corresponding to the above configuration, the insulating rail 2 is formed with two pairs of slide grooves 21 and 22 facing inward and a pair of protrusions 23 projecting outward (FIG. 1 (c). )).

  The pair of protrusions 23, 23 has a hook shape in which the cross section jumps upward slightly. Therefore, the protrusions 23 and 23 of the insulating rail 2 are disposed below the protrusions 13 and 13 of the base case 1, and the insulating rail 2 is slid and moved, so that the insulating rail 2 is appropriately placed inside the base case 1. Can be fitted.

  On the other hand, the two pairs of slide grooves 21 and 22 are provided to receive the lamp substrate 3 by sliding it. The two pairs of upper and lower slide grooves 21 and 22 have different facing distances, which correspond to the difference in the lateral width of the lamp substrate 3. However, in this embodiment, the lower slide groove 22 is not used.

  Next, the space below the slide grooves 21 and 22 functions as a space for accommodating circuit components of the power supply circuit mounted on the back surface side of the lamp substrate 3. Specifically, the circuit components to be accommodated are the full-wave rectifying element BD and the capacitors C1 to C4 in the circuit configurations of FIG. 4 and FIG. Note that the four resistors R1 to R4 constituting the power supply circuit are connected in parallel to the four capacitors C1 to C4, respectively, and are therefore arranged on the front side of the lamp substrate 3.

  By the way, the insulating rail 2 having the above-described configuration is disposed for the purpose of realizing complete electrical insulation between the conductive base case 1 and the lamp substrate 3. Therefore, even if the capacitors C1 to C4 come into contact with the insulating rail 2 by using the large capacitors C1 to C4, problems such as electric leakage do not occur. In addition, although the material of the insulation rail 2 is not specifically limited, A polypropylene (PP: polypropylene) is used suitably.

  As described above, the lamp substrate 3 is configured by connecting one or more base substrates BS (FIG. 3). Each base substrate BS is provided with an LED lamp 31 and a power supply circuit, and the substrate alone functions as a lighting device.

  More specifically, N × M types of base substrates BS are prepared according to the emission color of the LED lamps 31 mounted and the number of LED lamps 31. For example, there are four types (BS1 to BS4) of daylight color, daylight white, white, and light bulb color as the light emission color type N, and the number of LED lamps 31 is, for example, two types of 40 and 60 (BSi1, BSi2).

  For example, in the case of adopting such a configuration, the number of types of base substrates BSij is sufficient as N × M (= 4 × 2), and in this embodiment, an arbitrary number of such base substrates BSij are arranged in the longitudinal direction. Only various lamp substrates 3 having different longitudinal dimensions and emission colors are completed by connecting and connecting only the circuits. The longitudinal dimension of the base substrate differs according to the number of LED lamps 31 arranged in a line.

  FIG. 3 shows a state in which K base substrates BSij on which 40 or 60 LED lamps 31 of a specific emission color are mounted are connected. 4 shows the internal configuration of the base substrate BSi1 having 40 LED lamps 31 mounted thereon, and FIG. 5 shows the internal configuration of the base substrate BSi2 having 60 LED lamps 31 mounted thereon. In the following description, the LED lamp 31 may be referred to as light emitting diodes Li to Lj.

  Each base board BSij has two AC input terminals IN and two AC output terminals OUT. When the base boards BSij are connected, the AC output terminals OUT of the upstream base board BS and The AC input terminal IN of the downstream base substrate BS is electrically connected by two jumper wires JP.

  FIG. 7B shows a state where the AC output terminal OUT and the AC input terminal IN are soldered by the jumper wire JP. In addition, since the jumper wire JP has sufficient strength and rigidity, mechanical connection is also realized by electrical connection by the jumper wire JP.

  Further, in each base substrate BSij, about 2A fusing fuses F1 and F3 are arranged between the AC input terminal IN and the AC output terminal OUT, respectively, and a short circuit or the like is caused in the downstream base substrate BSij. When this occurs, the fuses F1 and F3 are blown based on the overcurrent, thereby preventing problems such as ignition.

  Next, the internal configuration of the 40 types of base substrates BSi1 will be described with reference to FIG. As shown in the figure, this base substrate BSi1 includes a full-wave rectifying element BD that receives AC 100 V via a fusing fuse F2 of about 1 A, smoothing resistors R1 to R4 that smooth the output voltage of the full-wave rectifying element BD, and a smoothing capacitor. C1 to C4, constant current elements D1 and D2, limiting resistors R5 to R10, and light emitting diodes L1 to L40.

  The base substrate BSi1 has a longitudinal dimension corresponding to the number of light-emitting diodes L1 to L40 arranged in alignment, and emits light with a luminance corresponding to 40 light-emitting diodes. In this specification, the light emitting diodes L1 to L40 are collectively referred to as an LED lamp 31.

  In the above configuration, the fuse F2, the full-wave rectifying element BD, the smoothing resistors R1 to R4, and the smoothing capacitors C1 to C4 constitute a power supply circuit, and on the back side of the circuit board except for the smoothing resistors R1 to R4. The circuit configuration shown in FIG. 4 is realized by the circuit pattern foil disposed and formed on the back side.

  However, the smoothing resistors R1 to R4 are arranged on the surface side of the circuit board and corresponding to the smoothing capacitors C1 to C4, and are connected in parallel to the corresponding smoothing capacitors C1 to C4 through the through holes of the circuit board. .

  The full-wave rectifying element BD has an internal configuration shown in FIG. 4C, and full-wave rectifies AC 100V by four rectifier diodes to generate a pulsating voltage having a peak value of 141V.

  The pulsating voltage with a peak value of 141 V is smoothed by the smoothing resistors R1 to R4 and the smoothing capacitors C1 to C4, and becomes a DC voltage of about 140V. However, in this embodiment, the smoothing resistors R1 and R2 and the smoothing capacitors C1 and C2 are divided into an upper smoothing circuit and the smoothing resistors R3 and R4 and the smoothing capacitors C3 and C4 are lower smoothing circuits. An output voltage of about 70V is generated.

  The output voltage 70V is transmitted to the front surface side of the circuit board via a through hole that connects the back surface pattern foil and the front surface pattern foil of the circuit board.

  The circuit configuration on the front side is also divided into two corresponding to the upper smoothing circuit and the lower smoothing circuit, and the first lighting circuit is formed by the constant current element D1, the limiting resistors R5 to R7, and the light emitting diodes L1 to L20. The second lighting circuit is realized by the constant current element D2, the limiting resistors R8 to R10, and the light emitting diodes L21 to L40.

  However, the first and second lighting circuits are the same in circuit configuration and circuit operation, and all the light emitting diodes L1 to L20 and L21 to L40 have a current of about 30 mA because the constant current elements D1 and D2 function. Light is emitted by the drive current.

  FIG. 4B is a characteristic diagram for explaining the circuit operation of the constant current elements D1 and D2, regardless of the ANODE-CATHODE voltage applied between the anode terminal ANODE as the input terminal and the cathode terminal CATHODE as the output terminal. It is shown that the energization current is controlled to a constant current of about 30 mA.

  However, the constant current elements D1 and D2 have a negative temperature coefficient (negative temperature characteristic), and have a characteristic that the constant current value automatically decreases as the element temperature increases (see FIG. 5 (b)). Therefore, all the light emitting diodes L1 to L40 are caused to emit light with the same luminance on condition that the element temperatures of the constant current elements D1 and D2 are appropriately limited.

  Therefore, in consideration of the negative temperature characteristic described above, in this embodiment, limiting resistors R5 to R10 are connected in series to the constant current elements D1 and D2 in order to appropriately limit the element temperatures of the constant current elements D1 and D2. is doing. Although not particularly limited, in this embodiment, the ANODE-CATHODE voltage of the constant current elements D1 and D2 is designed to be about 10 V, and the negative temperature is controlled by suppressing the power consumption inside the elements to about 10 * 30 mW. The automatic drop of the constant current value based on the characteristic is prevented.

  Next, FIG. 5 shows the internal configuration of the 60-type base substrate BSi2. This base substrate BSi2 is also divided into a power circuit whose main part is arranged on the back surface side and a lighting circuit arranged on the front surface side.

  The configuration of the power supply circuit is the same as that in FIG. 4, and includes an upper smoothing circuit of smoothing resistors R1, R2 and smoothing capacitors C1, C2, and a lower smoothing circuit of smoothing resistors R3, R4 and smoothing capacitors C3, C4. The output voltages of about 70V DC are generated. As in the case of FIG. 4, the power supply circuit is disposed on the back side of the circuit board except for the smoothing resistors R1 to R4.

  On the other hand, the configuration of the lighting circuit is different from that in FIG. 4, and the first and second lighting circuits are driven based on the output voltage 70V of the upper smoothing circuit, and the output voltage 70V of the lower smoothing circuit is set. Based on this, the third and fourth lighting circuits are configured to be driven.

  The first lighting circuit includes limiting resistors R5 to R8, a constant current element D1, and 15 light emitting diodes L1 to L15. The second lighting circuit includes limiting resistors R9 to R12 and a constant current element. D2 and 15 light emitting diodes L16 to L30.

  The third lighting circuit is composed of limiting resistors R13 to R16, a constant current element D3, and 15 light emitting diodes L31 to L45, and the fourth lighting circuit is composed of limiting resistors R17 to R20 and a constant current element. D4 and 15 light emitting diodes L46 to L60.

  The constant current elements D1 to D4 are all the same elements as in FIG. 4 and exhibit the characteristics of FIG. 4B to make the output current constant at about 30 mA. Therefore, all the light emitting diodes L1 to L60 emit light with the same luminance.

  However, in consideration of the negative temperature characteristics of the constant current elements D1 to D4, limiting resistors R5 to R8 are arranged in the first lighting circuit, limiting resistors R9 to R12 are arranged in the second lighting circuit, and the third Limiting resistors R13 to R16 are arranged in the lighting circuit, and limiting resistors R17 to R20 are arranged in the fourth lighting circuit.

  Each of the limiting resistors R5 to R8, R9 to R12, R13 to R16, R17 to R20 is arranged for the purpose of relaxing the ANODE-CATHODE voltage applied between the input / output terminals of the constant current elements D1 to D4. -CATHODE voltage is designed to be about 10V, for example.

  The 40-type base substrate BSi1 and the 60-type base substrate BSi2 have been described above with reference to FIGS. The two types of base substrates BSi1 and BSi2 are prepared in accordance with the light emission color of the LED lamp 31, and four types of base substrates BSij are formed as a whole. Street.

  Then, when a necessary number of such base substrates BSij are connected by the jumper wires JP, the lamp substrate 3 is completed. Then, the power cord 6 is soldered to the AC input terminal IN at the leftmost end of the connected base substrate BSij, and another power cord 6 is connected to the AC output terminal OUT at the rightmost end of the connected base substrate BSij. Solder.

  FIG. 6 shows a state in which the power cords 6 and 6 are connected to the lamp substrate 3 in which 40 types of base substrates BSi1 and 60 types of base substrates BSi2 are connected.

  6A shows a state in which the LED lamps 31 (L1 to L40 + L1 to L60) are arranged in a line so as to form a substantially central line. The limiting resistors R5 to R10 + R5 to R20 and the constant current elements D1 to D2 + D1 to D4 constituting the lighting circuit and the smoothing resistors R1 to R4 + R1 to R4 constituting the power supply circuit are in parallel with the LED lamp 31. , Discretely arranged at appropriate positions on the surface side.

  On the back side shown in FIG. 6B, smoothing capacitors C1 to C4 + C1 to C4 constituting the power supply circuit are discretely arranged, and the fuses F1 to F3 + F1 to F3 and the full-wave rectifying elements BD and BD are A state in which the base substrates BSi1 and BSi2 are arranged at the end portions is shown. A power cord 6 is connected to the AC input terminal IN at the left end of the base substrate BSi1 and the AC output terminal OUT at the right end of the base substrate BSi2 on the back side of the lamp substrate 3 ( FIG. 7 (a) and FIG. 7 (c)).

  As described above, the lamp substrate 3 has been described. Next, returning to FIG. 1, description of other components will be continued. The lamp substrate 3 completed in the state of FIG. 6 is accommodated inside the insulating rail 2 by sliding, for example, the slide grooves 21 and 21 of the insulating rail 2 fitted inside the base case 1. The

  FIG. 1F shows the accommodation state of the lamp substrate 3 on which the LED lamp 31 and the smoothing capacitor 32 are mounted. The smoothing capacitor 32 is accommodated in the space below the slide grooves 21 and 21.

  Subsequently, the lamp case 3 is covered by fitting the cover case 4 to the base case 1. As shown in FIG. 1 (i), the open end of the cover case 4 is formed in a substantially C-shape so that a pair of engaging grooves 41, 41 and a pair of protruding pieces 42, 42 are formed. .

  Therefore, the cover case 4 and the base case 1 are integrated by, for example, sliding the cover case 4 in a state where the protruding pieces 42 and 42 of the cover case 4 are immersed in the engaging grooves 14 of the base case 1. Can be made. In this integrated state, the LED lamp 31 on the lamp substrate is concealed by the cover case 4. However, since the LED lamp 31 has high brightness and the cover case 4 is milky white, the displayed product is illuminated with soft light. The material of the cover case is not particularly limited, but preferably polycarbonate (PC) is used.

  In this way, the cap members 5 shown in FIG. 1 (j) are disposed at both ends of the base case 1 and the cover case 4 that accommodate the lamp substrate 3. As shown in FIG. 1 (j), an opening 52 for allowing the power cord 6 to pass is provided below the cap member 5, and mounting screws SC and SC are screwed on both sides of the opening 52. Holes 51 and 51 are formed.

  The mounting holes 51 and 51 are formed at positions corresponding to the arc grooves 15 and 15 of the base case 1, and the arc grooves 15 and 15 are closed by the outer peripheral surface of the insulating rail 2. The closed space is set to be slightly narrow corresponding to the outer diameter of the mounting screw SC. Therefore, when the mounting screws SC, SC are screwed into the mounting holes 51, 51, the mounting screw SC is screwed while slightly expanding the closed space formed by the arc groove 15 and the insulating rail 2, and the lamp The insulating rail 2 that holds the substrate 3 holds the lamp substrate 3 firmly, while the insulating rail 2 that is pushed back to the lamp substrate 3 is firmly engaged with the mounting screw SC. And the lamp substrate 3 are reliably integrated.

  As described above, the configuration of the LED lighting device LGT has been mainly described. Finally, a method for manufacturing the LED lighting device LGT will be described. In the case of the embodiment, in addition to the lamp substrate 3, the base case 1, the insulating rail 2, and the cover case 4 are required, but these are all stocked in a long state without being cut in advance. Further, the lamp substrate 3 configured by combining the base substrates BSij is also in an unfinished state, and only 4 × 2 types of base substrates BSij are in stock.

  When the necessary specifications and the number of LED lighting devices LGT are determined, the base case 1, the insulating rail 2, and the cover case 4 are cut out in a necessary number corresponding to the longitudinal dimension of the LED lighting device LGT. In addition, the base substrate BSij corresponding to the specification of the LED lighting device LGT is selected, and the selected base substrate BSij is connected and connected by the jumper line JP. Further, at this timing or at an appropriate timing at the time of assembly, the power cords 6 and 6 are connected to both ends of the connected base substrates BSij to BSij.

  Then, the insulating rail 2 is fitted to the base case 1 by a method such that the protrusion 23 of the insulating rail 2 is engaged with the engaging surface 16 of the base case 1 and is slid. Further, the lamp substrate 3 is accommodated inside the insulating rail 2 by engaging the lamp substrate 3 with the slide groove 21 of the insulating rail 2 and sliding it.

  Thereafter, the cover case 4 is fitted to the base case 1 by engaging the protruding piece 42 of the cover case 4 with the engagement groove 14 of the base case 1 and sliding the cover piece 4 and finally, from the left and right ends. When the cap members 5 and 5 are covered and the mounting screws SC and SC are screwed in, the LED lighting device LGT is completed.

  As described above, in the present embodiment, the finished product is not stocked, and the lamp substrate 3 is manufactured at a necessary timing. Therefore, the inventory amount of the component members is optimized, and there is no waste in manufacturing the LED lighting device LGT.

  The embodiment has been described in detail above, but the specific configuration does not particularly limit the present invention and can be changed as appropriate. In particular, the lower slide groove 22 in the insulating rail 2 is basically unnecessary. FIG. 10 illustrates the insulating rail 2 having such a configuration.

  In addition, when illuminating a product display shelf where slight flicker does not pose a problem, the smoothing capacitors C1 to C4 may be omitted with emphasis on cost reduction.

  In addition, it is not always necessary to fit the lamp substrate 3 in a completed state to the insulating rail 2, and the lamp substrate 3 is mounted in a state where one or a plurality of base substrates BS to BS are fitted to the insulating rail 2. It may be completed. That is, the connection between the adjacent base substrates BS by the jumper line JP and the connection of the power cord 6 may be performed on the base substrate BS held by the base case 1 and the insulating rail 2.

1 Base Case 2 Insulating Rail 3 Lamp Board 4 Cover Case 5 Cap Member 6 Power Cord BS Base Board

Claims (5)

A first step of cutting the semicircular base case (1) into a length corresponding to the longitudinal dimension of the lamp substrate (3);
A second step of fitting an insulating rail (2) cut to a length corresponding to the longitudinal dimension of the base case (1) to the base case (1);
A third step of fitting the lamp substrate (3) to the insulating rail (2);
A fourth step of fitting a semicircular cross-sectional cover case (4) cut to a length corresponding to the longitudinal dimension of the base case (1) to the base case (1);
The first step to the fourth step are performed in an appropriate order to finish the columnar shape as a whole, and then the columnar shape is passed through the power cord (6) connected to the lamp substrate (3). A closing step of closing both ends with a cap member (5);
After the closing step, a fixing step is performed by attaching a fixing screw from the outside of the cap member (5), and fixing each member accommodated inside,
The lamp substrate (3) is constituted by connecting one or more base substrates (BS) mounted with LED lamps and a power supply circuit in the longitudinal direction,
In the closing step, the fixing screw is screwed into a mounting hole formed between the inner wall of the base case (1) and the outer wall of the insulating rail (2). Method.   The base case (1) is formed with three pairs of left and right ridges in the horizontal arrangement state, and the cover case (4) is received by the uppermost ridge and the ridge below the upper ridge. The manufacturing method according to claim 1, wherein a slide engagement groove (14) is realized.   The base case (1) is formed with three pairs of left and right ridges in a horizontal arrangement state, and the lower surface of the lowermost ridge is a slide engagement surface (2) for receiving the insulating rail (2). The manufacturing method according to claim 1 or 2, which is 16). The insulating rail (2) is formed with a pair of slide grooves (21) facing inward and a pair of protrusions (23) protruding outward,
The manufacturing method according to claim 3, wherein in the second step, the pair of protrusions are engaged with the slide engagement surface. A semi-circular metal base case (1);
An insulating rail (2) fitted to the inner surface of the base case (1);
A lamp substrate (3) held in a pair of slide grooves formed in the insulating rail (2);
By engaging with the open end of the base case (1), a cylindrical case is formed with the cover case (4) having a semicircular cross section covering the lamp substrate,
Both ends of the cylindrical shape in the longitudinal direction are closed by a pair of cap members (5) in a state in which the power cord (9) connected to the lamp substrate (3) is passed.
An LED lighting device, wherein a mounting hole is formed between the inner wall of the base case (1) and the outer wall of the insulating rail (2) so that a fixing screw is screwed in and extends outward. .