JP6307897B2 - Sheet insulator, insulation structure, and sheet insulator attachment method - Google Patents

Description

  The present invention relates to a sheet-like insulator that can be mounted on a substrate without using a fastener such as a screw, an insulating structure using the sheet-like insulator, and a sheet-like insulator attaching method.

  In order to ensure electrical insulation without isolation by an insulator, it is necessary to ensure both an insulation distance, that is, a spatial distance and a creepage distance. The clearance is the shortest distance through the space between the two conductors, and the creepage distance is the shortest distance along the surface of the insulator between the two conductive portions.

  FIG. 17 shows a path with a spatial distance C when there is no insulator between the two conductors 101 and 102, and FIG. 18 shows a space when the insulator 103 exists between the two conductors 101 and 102. A route of distance C is shown.

  19 shows a path of a creepage distance D when no insulator exists between the two conductors 101 and 102, and FIG. 20 shows a case where the insulator 103 exists between the two conductors 101 and 102. The route of the creeping distance D is shown.

  For example, Patent Documents 1 to 3 and the like exist as prior art documents regarding the insulation distance (spatial distance and creepage distance).

JP 59-33709 A Japanese Utility Model Publication No. 62-40414 JP 11-8481 A

  As shown in FIG. 21, when two conductors 101, 102 such as terminals and wirings are arranged on a component mounting surface 100a of a substrate 100 made of an insulating material such as a printed board, these two conductors 101, If there is no insulator between 102, in order to secure an insulation distance consisting of a spatial distance and a creepage distance, it is necessary to ensure a distance that does not cause a discharge between at least two conductors 101, 102. It becomes an obstacle to downsizing.

  Therefore, as shown in FIGS. 22 and 23, by attaching a wall-like insulator 103 made of an insulating material between the two conductors 101 and 102, an insulation distance is secured, and the distance between the two conductors 101 and 102 is secured. The method of shortening the distance is adopted.

  In FIG. 22, the insulator 103 is formed of a thin, flexible, and easily deformable insulating material such as insulating paper, and the insulator 103 is connected to one conductor 102 or the like by a fastening body 110 such as a screw or a bolt. The fixed case is shown. The insulator 103 is bent at a right angle to suppress inclination and deformation, one side 103a is fixed to the conductor 102 by a fastening body 110 such as a screw or a bolt, and the tip of the other side 103b is a substrate. 100 is inserted into a long hole 100 b formed in 100. In this case, in the conductor 101, it is necessary to form a screw hole or the like for fixing one side 103a of the insulator 103 with a fastening body 110 such as a screw or a bolt in the one conductor 102 or the like. In the substrate 100, it is necessary to form a long hole 100b into which the tip of the other side 103b of the insulator 103 is inserted. Instead of the long hole 100b, the other side 103b of the insulator 103 may be fixed to the substrate 100 with a fastening body such as a screw or a bolt, but in this case, a screw hole must be formed in the substrate 100.

  FIG. 23 shows a case where the insulator 103 is mounted on the substrate 100 in a self-supporting manner. In this case, a pair of leg portions 104 and 105 are provided on the rectangular insulator 103, and a locking claw piece 106 is provided on the lower end portion of the leg portions 104 and 105 to form a wedge shape or a key shape. What is fitted and locked to the leg insertion holes 107 and 108 formed in the above has been developed. (For example, patent document 3).

  In this case, if the thickness of the insulator 103 is thin, the insulator 103 is easily tilted on the substrate 100 and inclined. For this reason, the insulator 103 needs to be formed of a material having a hardness and a thickness capable of supporting itself without falling down when the leg portions 104 and 105 are fitted and locked in the leg insertion holes 107 and 108. When the insulator 103 is made of an insulating material that is thin, flexible, and easily deformed, such as insulating paper, it is difficult to stably attach the insulator 103 on the substrate 100 in a self-standing manner.

  The present invention relates to a sheet-like insulator that can be stably attached to a substrate even if it is thin, an insulating structure using the sheet-like insulator, and a sheet-like insulator attaching method for attaching the sheet-like insulator to a substrate. is there.

The sheet-like insulator of the present invention is a sheet-like insulator that is attached between conductors arranged on a substrate and insulates between the conductors,
A main insulating portion; a first and second leg portion that is formed to project from a lower portion of the main insulating portion and is inserted into a leg insertion hole provided in the substrate; and a part of the main insulating portion is connected to the main insulating portion. And a telescopic part projecting in the thickness direction.

  In the present invention, the sheet-like insulator includes a main insulating portion, and first and second leg portions that are formed so as to protrude below the main insulating portion and are inserted into leg insertion holes provided in the substrate. And a stretchable part that protrudes a part of the main insulation part in the thickness direction of the main insulation part, so even if the thickness of the main insulation part is thin, the presence of the stretchable part makes the sheet The state insulator can be attached on the substrate in a stable state.

  Further, if the compression is released after the expansion and contraction portion is compressed to reduce the distance between the first and second leg portions and the first and second leg portions are inserted into the leg insertion holes, The second leg extends to the original state, engages with the substrate, and the sheet-like insulator is erected on the substrate, so that it is easy to use without using fasteners such as bolts and screws. The sheet-like insulator can be easily attached to the substrate.

The perspective view of the sheet-like insulator of 1st Embodiment. The front view of the sheet-like insulator. The top view of the sheet-like insulator. The top view of an insulation structure. The front view of an insulation structure. The top view of a board | substrate. The front view of a board | substrate. The front view of the sheet-like insulator made into the schematic diagram. (A), (B), (C) is explanatory drawing which shows the 1st example of the sheet-like insulator attachment method. Explanatory drawing which shows the 2nd example of the sheet-like insulator attachment method. The perspective view of the sheet-like insulator of 2nd Embodiment. The front view of the sheet-like insulator of 2nd Embodiment. The top view of the sheet-like insulator of 2nd Embodiment. Explanatory drawing which shows the effect of the sheet-like insulator of 2nd Embodiment. The top view which shows the state which attached the sheet-like insulator to the narrow space by the method of the 2nd example. The same side view. Explanatory drawing which shows the path | route of the spatial distance C when an insulator does not exist between two conductors. Explanatory drawing which shows the path | route of the spatial distance C when an insulator exists between two conductors. Explanatory drawing which shows the path | route of the creeping distance D when an insulator does not exist between two conductors. Explanatory drawing which shows the path | route of the creeping distance D when an insulator exists between two conductors. (A) is a top view which shows the case where an insulator is not arrange | positioned between two conductors, (B) is the same front view. (A) is a top view which shows an example which provided the insulator between two conductors, (B) is the same front view. The perspective view which shows the other conventional example of an insulator

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a sheet-like insulator 1 according to the first embodiment. FIG. 1 is a perspective view of the sheet-like insulator 1, FIG. 2 is a front view, and FIG. 3 is a plan view. The sheet-like insulator 1 is used for an insulating structure 11 that is installed upright between conductors 13 and 14 disposed on an insulating substrate 12 described later to insulate the conductors 13 and 14 from each other. (See FIGS. 4 and 5).

  As shown in FIG. 2, the sheet-like insulator 1 is formed so as to protrude from a rectangular main insulating portion 2 (indicated by a broken line 2a) having a width W1 and a height H1, and a lower portion of the main insulating portion 2. The first leg 3 inserted into the first leg insertion hole 15 (see FIG. 6) provided in the insulating substrate 12, the second leg 4 inserted into the second leg insertion hole 16, and the main leg And a telescopic part 6 formed by projecting a part of the insulating part 2 in the thickness direction of the main insulating part.

  When the first leg 3 and the second leg 4 are inserted into the first leg insertion hole 15 and the second leg insertion hole 16, the first leg 3 and the second leg 4 have the substrate. 12 is provided with a protrusion 5 for preventing the first leg 3 and the second leg 4 from coming out of the first leg insertion hole 15 and the second leg insertion hole 16 by engaging with the lower surface of the first leg part 3. ing.

  The expansion / contraction part 6 includes a first bent part 6a formed at the center in the width direction of the main insulating part 2, a second bent part 6b formed on both sides of the first bent part 6a, and a third The bent portion 6 c is formed in a substantially V shape in plan view.

  The main insulating portion 2, the first leg portion 3, the second leg portion 4, and the protrusion preventing projection 5 of the sheet-like insulator 1 are formed by punching a single plate material into a predetermined shape, and the central portion of the main insulating portion 2 Is bent at a predetermined angle θ by the first to third bent portions 6a to 6c.

  The sheet-like insulator 1 is maintained at the width W1 in a state where no compressive force in the width direction is applied. When a compressive force is applied to the sheet-like insulator 1, the sheet-like insulator 1 is further bent at the first bent portion 6a to the third bent portion 6c, the expandable portion 6 is compressed, and the width W1 of the sheet-like insulator 1 is reduced. .

  The size, shape, etc. of the main insulating part 2, the first leg part 3, the second leg part 4 and the protrusion prevention part 5 of the sheet-like insulator 1 are the first leg insertion holes formed in the substrate 12 described later. 15 and the length of the second leg insertion hole 16, the thickness T of the substrate 12, and the like.

  Any material can be applied as the material of the sheet-like insulator 1 as long as it can be formed into a sheet shape. For example, plastic sheets such as polypropylene, polyethylene, PET, and vinyl chloride, insulating paper, and the like are applied. In the first embodiment shown in FIGS. 1 to 3, insulating paper having a thickness of 0.2 to 0.8 mm is used. If insulating paper is used, the expansion / contraction part 6 can be bent without using a special processing jig.

  Examples of the insulating paper include insulating paper containing pulp as a main component, insulating paper bonded with a polyester film or PET film, and the insulating effect can be obtained using any insulating paper.

  More preferably, it is an insulating paper made of an aramid (fully aromatic polyamide) polymer. The use of insulating paper made of an aramid (fully aromatic polyamide) polymer has the effect that an excellent insulating structure can be realized due to the high temperature durability, mechanical and electrical properties of aramid.

  Furthermore, among insulating paper made from aramid (fully aromatic polyamide) polymer, Nomex (registered trademark) type 410, type 411, type 414, type 418, which is an insulating paper made by DuPont Teijin Advanced Paper Co., Ltd. Either one is desirable.

  These Nomex papers are allowed to be used continuously at 220 ° C. in the UL standard. Using Nomex papers ensures not only the insulation distance, but also higher temperatures than when other insulating papers are used. Reliability can be obtained.

  In the above-described embodiment, the case where the expansion / contraction part 6 is formed in a V shape by bending the main insulating part 2 at three locations is shown. However, the number of the bending parts is increased and the expansion / contraction part 6 is made W. It may be formed in a shape, or may be formed in a multi-stage bellows shape by further increasing the number of bent portions. Further, the expansion / contraction part 6 may be formed in a so-called zigzag shape that protrudes not only to one side of the main insulating part 2 but also to the other side. The sheet-like insulator 1 can be mounted on the substrate 12 in a more stable state by being formed in a zigzag shape.

  4 and 5 are a plan view and a front view schematically showing an insulating structure 11 using the sheet-like insulator 1.

  The insulating structure 11 of the present invention is formed by mounting the sheet-like insulator 1 upright between the conductors 13 and 14 disposed on the substrate 12.

  6 and 7 are a schematic plan view and a front view of the substrate 12 with the sheet-like insulator 1 removed. As shown in FIG. 6, a first leg insertion hole 15 and a second leg insertion hole 16 are formed between the conductors 13 and 14 of the substrate 12.

  The first leg portion insertion hole 15 is formed in a long hole shape having a length L1, and the second leg portion insertion hole 16 is formed in a long hole shape having a length L2. The first leg insertion hole 15 and the second leg insertion hole 16 are formed in a straight line over the length L3. Further, as shown in FIG. 7, the substrate 12 is formed with a thickness T.

  FIG. 8 shows a schematic front view of the sheet-like insulator 1 in a state where the expansion / contraction part 6 is extended (a state where no compression force is applied). The first bent portion 6 a at the center of the first bent portion 6 a to the third bent portion 6 c constituting the extendable portion 6 is located at the center portion of the main insulating portion 2. The first leg portion 3, the second leg portion 4 and the removal preventing projection 5 are arranged at symmetrical positions around the first bent portion 6a.

  The width W2 from the tip of the protrusion 5 for preventing the first leg 3 to the tip of the protrusion 5 for preventing the second leg 4 is equal to the first leg insertion hole 15 formed in the substrate 12. It is formed larger than the length L3 formed by the second leg insertion hole 16 (W2> L3).

  A width W3 of the first leg portion 3 including the protrusion preventing protrusion 5 is formed to be substantially the same value as the length L1 of the first leg insertion hole 15. Further, the width W4 of the second leg portion 4 including the protrusion preventing protrusion 5 is formed to be substantially the same value as the length L2 of the second leg portion insertion hole 16.

  Further, a step E is formed between the broken line 2a portion indicating the boundary between the main insulating portion 2 and the leg portions 3 and 4 and the upper surface 5b of the drop preventing projection 5. The step E is formed to have substantially the same value as the thickness T of the substrate 12.

  9A to 9C show a first example of a sheet-like insulator mounting method. FIG. 9A shows a state where the sheet-like insulator 1 is stacked on the first leg insertion hole 15 and the second leg insertion hole 16 of the substrate 12. In this state, the width W2 from the tip of the protrusion 5 for preventing the first leg 3 of the sheet-like insulator 1 to the tip of the protrusion 5 for preventing the second leg 4 is set to the substrate 12. Since the length L3 formed by the formed first leg insertion hole 15 and second leg insertion hole 16 is larger (W2> L3), the sheet-like insulator 1 is directed vertically toward the substrate 12. The first leg 3 and the second leg 4 cannot be inserted into the first leg insertion hole 15 and the second leg insertion hole 16 even if they are moved in the direction.

  Therefore, as shown in FIG. 9B, the compressive force P1 is applied to the sheet-like insulator 1 to compress the stretchable portion 6, and the width W2 of the sheet-like insulator 1 is reduced to the length L3. The first leg portion 3 and the second leg portion 4 are positioned immediately above the first leg portion insertion hole 15 and the second leg portion insertion hole 16.

  Then, as shown in FIG. 9C, the first leg 3 and the second leg 4 are inserted into the first leg insertion hole 15 and the second leg insertion hole 16 to release the compression force P1. For example, the sheet-like insulator 1 extends to the width W2 due to the restoring force P2 of the expansion / contraction part 6, and the protrusions 5 for preventing the first leg part 3 and the second leg part 4 from coming off are formed on the lower surface of the substrate 12. As a result of the engagement, the sheet-like insulator 1 is attached to the substrate 12 and is prevented from coming off from the first leg insertion hole 15 and the second leg insertion hole 16.

  In the sheet-like insulator attachment method of the first example, the sheet-like insulator 1 must be attached to the substrate 12 while compressing the stretchable part 6 with both the left and right hands. For this reason, a large space S is required between the conductors 13 and 14 as shown in FIG.

  FIG. 10 shows a second example of a sheet-like insulator mounting method that does not require a large space S between the conductors 13 and 14.

  In the sheet-like insulator mounting method of the second example, first, one end 1 a of the sheet-like insulator 1 is picked and the protrusion 5 for preventing the first leg 3 from being inserted is inserted into the first leg insertion hole 15. To do. Then, the second leg portion 4 and the protrusion for preventing slipping are rotated by turning the one end 1a of the sheet-like insulator 1 in the direction of the arrow A with a fingertip or the like using the corner portion 20 of the first leg insertion hole 15 as a fulcrum. 5 is inserted into the second leg insertion hole 16 to attach the sheet-like insulator 1 to the substrate 12.

  This method can also be adopted when the space S between the conductors 13 and 14 shown in FIG. 7 is narrow, but the sheet-like insulator 1 is bent so that the second leg 4 and the protrusions for preventing the removal are provided. It was difficult to smoothly insert 5 into the second leg insertion hole 16.

  FIGS. 11 to 13 show a sheet-like insulator 1A according to a second embodiment that facilitates the use of the sheet-like insulator attachment method of the second example. 11 is a perspective view of the sheet-like insulator 1A, FIG. 12 is a front view, and FIG. 13 is a plan view.

  The difference between the sheet-like insulator 1 according to the first embodiment and the sheet-like insulator 1A according to the second embodiment is that, in the sheet-like insulator 1A according to the second embodiment, a notch 7 is formed on the upper end side of the stretchable part 6. And the sheet-like insulator 1A is easily bent by the cut portion 7. Since other configurations are the same as those of the sheet-like insulator 1 of the first embodiment, the same components are denoted by the same reference numerals, and redundant description is omitted.

  The cut portion 7 is formed by cutting out the upper end portion of the first bent portion 6a at the center in the width direction of the sheet-like insulator 1A into a V shape.

  Since the sheet-like insulator 1A of the second embodiment has formed the cut portion 7 on the upper end side of the stretchable portion 6, when used in the sheet-like insulator mounting method of the second example, as shown in FIG. Due to the presence of the notch 7, the sheet-like insulator 1A is bent relatively easily, and the second leg 4 and the protrusion 5 for preventing slipping can be smoothly inserted into the second leg insertion hole 16.

  As described above, in the embodiment, the cut portion 7 is formed by cutting the upper end portion of the second bent portion 6b of the sheet-like insulator 1A into a V shape. The shape of 7 may be a U-shape, other shapes, or a simple slit. The notch part 7 is not limited to the 1st bending part 6a, You may form in the 2nd bending part 6b and the 3rd bending part 6c, and may be formed in places other than a bending part. Moreover, you may form the notch part 7 in the lower end part of a bending part.

  In the above embodiment, the first leg insertion hole 15 and the second leg insertion hole 16 are provided with two leg insertion holes. However, these two leg insertion holes are combined to form a 1 You may comprise as one leg part insertion hole.

  FIGS. 15 and 16 show a three-phase insulating structure in which copper saddle clamps 21 and 22 are used as conductors, and a short bar 23 made of copper is screwed 24 between the input and output. A sheet-like insulator 1 is attached between the phases.

  As shown in FIG. 15, since the gap G between the phases is narrow, it is difficult to attach the sheet-like insulator 1 as compared with the case where the gap G is wide. Moreover, when the said space | interval G is narrow, when compressing the expansion-contraction part 6, it may cause trouble. (When the expansion / contraction part 6 is compressed, the thickness of the expansion / contraction part 6 increases. Therefore, when the gap G is narrow, the expansion / contraction part 6 abuts against the saddle clamps 21, 22 and the short bar 23 and compresses the expansion / contraction part 6. May not be possible).

  In such a case, the method shown in FIG. 10 is used. According to this method, the first leg 3 and the removal preventing projection 5 are inserted into the first leg insertion hole 15, and the corner portion 20 of the first leg 3 and the removal preventing projection 5 is used as a fulcrum. Since the second leg 4 and the protrusion 5 for preventing removal are inserted into the second leg insertion hole 16 while rotating the insulator 1 in the direction of the arrow A, even when the gap G between the phases is narrow The sheet-like insulator 1 can be attached to the substrate 12 relatively easily.

  In such a three-phase insulating structure, as shown in FIG. 16, the first leg portion 3 and the second leg portion 4 of the sheet-like insulator 1 protrude toward the lower surface side of the substrate 12. Although the distance can be increased, the leg portions 3 and 4 are not present between the first leg portion 3 and the second leg portion 4, and between the lower end 1 b of the sheet-like insulator 1 and the upper surface of the substrate 12. However, as described above, the short bar 23 is attached to the saddle clamps 21 and 22 and floats in the air. The distance can be increased so that the insulation distance is not short. Further, both ends of the short bar 23 are designed in consideration of the projecting dimension of the sheet-like insulator 1 so that the insulation distance is not short.

DESCRIPTION OF SYMBOLS 1 ... Sheet-like insulator 2 ... Main insulation part of sheet-like insulator 3 ... 1st leg part 4 ... 2nd leg part 5 ... Protrusion part 6 ... Expansion-contraction part 7 ... Notch part 11 ... Insulation structure 12 ... Substrate 13, 14 ... Conductor 15 ... First leg insertion hole 16 ... Second leg insertion hole

Claims (6)

A sheet-like insulator that is attached between conductors arranged on a substrate and insulates between the conductors,
A main insulating portion; a first and second leg portion that is formed to project from a lower portion of the main insulating portion and is inserted into a leg insertion hole provided in the substrate; and a part of the main insulating portion is connected to the main insulating portion. An elastic part projecting in the thickness direction ,
The stretchable portion is formed by providing a plurality of bent portions in the main insulating portion, and has at least one or more cut portions on the upper end side, and the cut portions are formed in the main insulating portion. sheet insulator characterized in that formed at the upper end of the bent portion. A sheet-like insulator that is attached between conductors arranged on a substrate and insulates between the conductors,
A main insulating portion; a first and second leg portion that is formed to project from a lower portion of the main insulating portion and is inserted into a leg insertion hole provided in the substrate; and a part of the main insulating portion is connected to the main insulating portion. An elastic part projecting in the thickness direction ,
The stretchable part is formed in a substantially V shape in plan view by a first bent part formed in the main insulating part and second and third bent parts formed on both side parts of the first bent part , comprises at least one or more notches on the upper side, the cutout portion has a sheet-like insulator you characterized in that formed at the upper end of the bent portion formed on the main insulating section. 3. The sheet-like insulator according to claim 2 , wherein the cut portion is formed at an upper end of a first bent portion formed at a center portion in the width direction of the main insulating portion. The said 1st, 2nd leg part is provided with the protrusion for a removal prevention which engages with the said board | substrate when the insertion to the said leg part insertion hole is completed, Any one of Claim 1 to 3 characterized by the above-mentioned. The sheet-like insulator according to 1. Use of the sheet-like insulator according to any one of claims 1 to 4 , wherein the sheet-like insulator is erected and mounted on a substrate to insulate between conductors on the substrate,
The said board | substrate is provided with the leg part insertion hole which inserts a said 1st leg part and a 2nd leg part, The insulation structure characterized by the above-mentioned. The said leg part insertion hole is comprised by the 1st leg part insertion hole which inserts a said 1st leg part, and the 2nd leg part insertion hole which inserts a 2nd leg part, It is characterized by the above-mentioned. 5. Insulation structure according to 5 .

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