JP2007311045A - Shield member and shield electric wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shield member that can prevent a jump in costs by reducing the amount of members used and is suitable for a shielded electric wire capable of obtaining sufficient shield performance. <P>SOLUTION: The shield member 4 has a bonding layer 7 formed onto one surface 5a at an unlaminated side of a reinforcing layer 6 in a shield layer 5. In this case, the shield layer 5 is attached to a covered conductor 2 and a drain wire 3 vertically with the bonding layer 7 inside. The shield layer 5 comes into contact with the drain wire 3 directly at a portion where no bonding layers 7 are formed. Noise travels to the shield layer 5, where the noise enters the inside of an electric wire from the outside of the shield electric wire 1 to enter a conductor 2a of the covered conductor 2. The noise traveling to the shield layer 5 is released to the outside of the shield electric wire 1 via the drain wire 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a shield member suitable for a shielded wire used for a wire harness routed in a vehicle, and a shielded wire using the shield member.

  In a vehicle such as an automobile, a wire harness is routed in order to supply electric power from a power source such as a battery to a variety of mounted electronic devices or to send a control signal from a control device. The wire harness is assembled by cutting a long electric wire into a predetermined length, attaching a terminal fitting to an end of the cut electric wire, and inserting the terminal fitting into a connector housing. As an electric wire constituting the wire harness, a shielded electric wire 1 as shown in FIGS. 7 to 11 may be used.

  As shown in FIG. 7, the shielded electric wire 1 includes a plurality of covered electric wires 2, a single drain wire 3, and a shield member 4. Each of the covered electric wires 2 includes a conductive core wire 2a and a covering portion 2b that covers the core wire 2a. The core wire 2a has a round cross section and includes copper or a copper alloy. The said covering part 2b is comprised from the synthetic resin which has insulation.

  The drain line 3 has a round cross section and is made of a conductive metal such as copper or a copper alloy. The drain line is not covered and the drain line is bare.

  As shown in FIG. 8 or 10, the shield member 4 is formed in a sheet shape in which a shield layer 5, a reinforcing layer 6, and an adhesive layer 7 are laminated. The shield layer 5 is composed of a thin metal layer having conductivity such as copper, a copper alloy, or aluminum. The reinforcing layer 6 is composed of a synthetic resin layer having insulating properties. The adhesive layer 7 is formed in a sheet shape covering the entire surface of the laminated shield layer 5 and reinforcing layer 6 and is made of, for example, a hot-melt adhesive based on a thermoplastic polymer.

  As shown in FIG. 7, the shield member 4 is configured to wrap the covered electric wire 2 and the drain wire 3 from the outer periphery thereof along the longitudinal direction.

  As shown in FIG. 8, among the shield members 4, in the case of a shield member 4 in which an adhesive layer 7 is formed on the outer surface of the reinforcing layer 6 between the laminated shield layer 5 and the reinforcing layer 6, The shield member 4 is wound around the covered electric wire 2 and the drain wire 3 so that the layer 5 is located on the inner side (electric wire side). And as shown in FIG. 9, the other end part 4b is piled up on the one end part 4a of the width direction (A direction) of the said shield member 4, and the contact bonding layer 7 of the outer surface of the said one end part 4a is the said other end part 4b. The shield member 4 is wound around the covered electric wire 2 and the drain wire 3 by contacting and adhering to the shield layer 5 on the inner surface.

  Further, among the shield members 4, as shown in FIG. 10, in the case of the shield member 4 in which the adhesive layer 7 is formed on the inner surface of the shield layer 5 of the laminated shield layer 5 and the reinforcing layer 6, The shield member 4 is wound around the covered electric wire 2 and the drain wire 3 so that the adhesive layer 7 is located on the inner side (electric wire side). And as shown in FIG. 11, the other end part 4b is piled up on the one end part 4a of the width direction (A direction) of the said shield member 4, and the reinforcement layer 6 of the outer surface of the said one end part 4a is the said other end part 4b. When the adhesive layer 7 formed on the entire inner surface of the shield layer 5 is in direct contact with and adhered to the covered electric wire 2 and the drain wire 3 while being in contact with the adhesive layer 7 on the inner surface, the shield member 4 is wound around the covered electric wire 2 and the drain wire 3.

The shielded electric wire 1 is configured such that a shield layer 5 of a shield member 4 wound around the covered electric wire 2 and the drain wire 3 is in contact with the drain wire 3. Therefore, when noise enters the inside of the electric wire from the outside of the shielded electric wire 1 and tries to enter the core wire 2a of the covered electric wire 2, the noise is transmitted to the shield layer 5 and the noise transmitted to the shield layer 5 is drained. It escapes to the outside of the shielded electric wire 1 through the wire 3. Therefore, the shield layer 5 can prevent noise from entering the core wire 2a of the covered electric wire 2 from the outside.
JP 2001-057114 A

  However, in the shield member 4 in which the adhesive layer 7 is formed on the outer surface of the reinforcing layer 6 of the laminated shield layer 5 and the reinforcing layer 6 among the shield members 4 described above, the shield layer 5 is on the inner side (electric wire side). Since the shield member 4 is wound around the covered electric wire 2 and the drain wire 3 so as to be positioned at the position, the shield layer 5, the covered electric wire 2 and the drain wire 3 located inside the shield layer 5, There is no adhesive fixing means between them, and there is a problem that the covered electric wire 2 and the drain wire 3 wound around the shield member 4 come out of the shield member 4. And in order to prevent this electric wire pull-out, it is necessary to wind the circumference | surroundings of the shield member 4 around which the covered electric wire 2 etc. were wound with a tape etc., and to fix the covered electric wire 2 etc., For that purpose, a fixing tape etc. There was a problem that the amount of the member used increased and the cost of the shielded electric wire 1 increased.

  Further, in the shield member 4 in which the adhesive layer 7 is formed on the inner surface of the shield layer 5 of the laminated shield layer 5 and the reinforcing layer 6, the shield member is positioned so that the adhesive layer 7 is located on the inner side (electric wire side). Since 4 is wound around the covered electric wire 2 and the drain wire 3, the adhesive layer 7 formed on the entire inner surface of the shield layer 5 directly contacts and adheres to the covered electric wire 2 and the drain wire 3, thereby shielding the shield. There is a problem in that the layer 5 does not come into contact with the drain wire 3 and the shielded electric wire 1 cannot obtain sufficient shielding performance. That is, the adhesive layer 7 is made of an adhesive such as a thermoplastic polymer, and the adhesive has electrical insulation, so that electrical insulation is provided between the shield layer 5 and the drain wire 3. When the adhesive layer 7 is interposed, the electrical contact between the shield layer 5 and the drain wire 3 cannot be obtained, and noise transmitted to the shield layer 5 cannot be released to the drain wire 3. Shield performance cannot be obtained.

  Accordingly, an object of the present invention is to provide a shield member suitable for a shielded electric wire that can prevent a rise in cost by reducing the amount of use of the member and that can obtain a sufficient shield performance.

  In order to solve the above problem, the invention according to claim 1 includes at least a shield layer and an adhesive layer partially formed on one surface of the shield layer, and the shield layer includes the adhesive. The shield member is configured to be vertically attached to the covered electric wire and the drain wire with the layer inside.

  A second aspect of the present invention is the shield member according to the first aspect, wherein the adhesive layer is formed in a striped pattern on one surface of the shield layer.

  A third aspect of the present invention is the shield member according to the second aspect of the present invention, wherein the stripe pattern of the adhesive layer is formed obliquely with respect to the longitudinal direction of the shield layer.

  The invention according to claim 4 is the shield member according to any one of claims 1 to 3, wherein the adhesive layer is made of a thermoplastic adhesive. .

  Invention of Claim 5 is equipped with the shield member as described in any one of Claim 1 thru | or 4, and this shield member is comprised vertically attached to the covered electric wire and the drain wire. This is a featured shielded wire.

  According to the invention described in claim 1, at least a shield layer and an adhesive layer partially formed on one surface of the shield layer are provided, and the shield layer has the adhesive layer on the inside. Therefore, the adhesive layer partially formed on one surface of the shield layer is in contact with the outer surface of the covered wire and the drain wire. So that the covered electric wire can be prevented from being pulled out of the shield member, so that the shield member around which the covered electric wire is wound is further taped to prevent the electric wire from coming off. It is not necessary to wind and fix the covered electric wire and the like, and therefore, the amount of a member such as a fixing tape can be suppressed to prevent an increase in cost.

  In addition, since the shield layer has an adhesive layer partially formed on one surface of the shield layer, the shield layer is configured to be vertically attached to the covered electric wire and the drain wire with the adhesive layer inside. The shield layer and the drain wire come into direct contact with each other at the portion where the adhesive layer is not formed, and when noise enters the inside of the wire from the outside of the shielded wire and enters the core wire of the covered wire, Noise is transmitted to the shield layer, and the noise transmitted to the shield layer is released to the outside of the shielded electric wire via the drain wire, and therefore sufficient shielding performance can be obtained.

  According to the invention described in claim 2, since the adhesive layer is formed in a striped pattern on one surface of the shield layer, the adhesive layer is prevented from being formed on the entire surface of the shield layer. When the shield member is vertically attached to the covered electric wire and the drain wire, the contact between the shield layer and the drain wire can be reliably obtained at the portion where the adhesive layer is not formed.

  According to the invention described in claim 3, since the stripe pattern of the adhesive layer is formed obliquely with respect to the longitudinal direction of the shield layer, the adhesive layer is continuously provided in the longitudinal direction of the shield layer. Even if the shield member is cut to a predetermined length, an adhesive layer is always partially formed on one surface of the shield layer, and therefore the shield member is continuously formed. be able to.

  According to the invention described in claim 4, since the adhesive layer is made of a thermoplastic adhesive, it can be immediately bonded by heating and melting at the time of use, and the productivity of the shielded electric wire is increased. Can do.

  According to the invention described in claim 5, the shield member according to any one of claims 1 to 4 is provided, and the shield member is configured to be vertically attached to the covered electric wire and the drain wire. Since the shielded wire is a shielded wire, an adhesive layer partially formed on one surface of the shield layer comes into contact with and adheres to the outer surface of the covered wire and the drain wire. It is possible to prevent the so-called electric wire disconnection that comes off the member. For this reason, it is no longer necessary to wind the shield member around which the covered wire is wound with tape to fix the covered wire in order to prevent the wire from being pulled out. This can prevent the cost of shielded wires from rising.

  Moreover, since the shielded electric wire provided with the shield member described above is partially formed with the adhesive layer formed on the surface of the shield layer on the electric wire side, the shield layer and the drain wire are not formed in the portion where the adhesive layer is formed. When the noise enters the inside of the wire from the outside of the shielded wire and tries to enter the core wire of the covered wire, the noise is transmitted to the shield layer, and the noise transmitted to the shield layer is It escapes to the outside of the shielded electric wire through the drain wire, so that the shielded electric wire can obtain a sufficient shielding performance.

  Hereinafter, an embodiment of the shield member 4 according to the present invention will be described with reference to the drawings of FIGS. The shield member 4 according to the present embodiment is used for a shielded electric wire 1 used for a wire harness arranged in an automobile.

  As shown in FIG. 1, the shielded electric wire 1 is configured by sandwiching a plurality of covered electric wires 2 and one drain wire 3 between shield members 4 bent in a U shape.

  The said covered electric wire 2 is provided with the core wire 2a which has electroconductivity, and the coating | coated part 2b which coat | covers this core wire 2a. The core wire 2a is formed by twisting a plurality of conductive wires made of a conductive metal such as copper or copper alloy, and has a round cross section. That is, the core wire 2a is a stranded wire. Moreover, the said coating | coated part 2b is comprised from the synthetic resin which has insulation, and coat | covers the said core wire 2a keeping an insulation state.

  The drain line 3 has a round cross section and is made of a conductive metal such as copper or a copper alloy. The periphery of the drain line 3 is not covered, and the drain line 3 is bare. In addition, terminal fittings for wiring (not shown) are attached to both ends of the drain wire 3 and the covered electric wire 2.

  The shield member 4 has flexibility and is formed as a thin belt-like sheet, and is configured by laminating an adhesive layer 7, a shield layer 5, and a reinforcing layer 6 as shown in FIG. . The shield layer 5 is formed in a strip shape in accordance with the shape of the shield member 4 and is composed of a thin metal layer having conductivity containing aluminum or an aluminum alloy. The adhesive layer 7 is made of, for example, a hot-melt thermoplastic adhesive based on a thermoplastic polymer, and is partially formed on one surface 5 a of the shield layer 5. The reinforcing layer 6 is made of, for example, an insulating synthetic resin layer such as polyvinyl chloride, and is laminated on the other surface 5b of the shield layer 5 where the adhesive layer 7 is not formed.

  As shown in FIG. 3, the adhesive layer 7 is formed in a striped pattern formed obliquely with respect to the longitudinal direction (B direction) of the shield layer 5, and partially on one surface 5 a of the shield layer 5. Is formed. Therefore, the adhesive layer 7 is not formed so as to cover the entire one surface 5a of the shield layer 5, and on the one surface 5a of the shield layer 5, a portion where the adhesive layer 7 is formed, The portions where the adhesive layer 7 is not formed are alternately present.

  The shield member 7 is configured to overlap the outer surfaces of the electric wires 2 and 3 along the longitudinal direction of the covered electric wire 2 and the drain wire 3 so as to wrap the electric wires 2 and 3 from the outer periphery. Thus, wrapping the shield member 4 along the longitudinal direction of the electric wires 2 and 3 is referred to as “the shield member 4 vertically attaches to the electric wires 2 and 3”.

  In order to vertically attach the shield member 4 to the covered electric wire 2 and the drain wire 3, as shown in FIG. 4, the adhesive layer 7 formed on one surface 5a of the shield layer 4 is provided on the inner side (on the electric wire side). The shield member 4 is wound around the electric wires 2 and 3 so that the shield member 4 wraps the electric wires 2 and 3 from the outer periphery. Then, as shown in FIG. 1, one end 4a in the width direction (A direction) of the shield member 4 is overlapped with the other end 4b, and the adhesive layer 7 on the inner surface of the one end 4a and the inner surface of the other end 4b. And the adhesive layer 7 partially formed on one surface 5a of the shield layer 5 contacts and adheres to the outer surface of the covered electric wire 2 and the drain wire 3 By doing so, the shield member 4 is wound and fixed around the covered electric wire 2 and the drain wire 3, whereby the shielded electric wire 1 is configured.

  As described above, in the shielded electric wire 1 configured by vertically attaching the shield member 4 to the covered electric wire 2 and the drain wire 3, the adhesive layer 7 formed on the electric wire side surface 5a of the shield layer 5 is partially formed. Therefore, the shield layer 5 and the drain line 3 are configured to be in direct contact with each other at the portion where the adhesive layer 7 is not formed. Therefore, when noise enters the inside of the wire from the outside of the shielded wire 1 and tries to enter the core wire 2a of the covered wire 2, the noise is transmitted to the shield layer 5 and the noise transmitted to the shield layer 5 is drained. It escapes to the outside of the shielded electric wire 1 through the wire 3. Therefore, the shield layer 5 can prevent noise from entering the core wire 2a of the covered electric wire 2 from the outside, and the shield electric wire 1 can obtain sufficient shielding performance.

  In addition, the shielded electric wire 1 has an adhesive layer 7 partially formed on one surface 5a of the shield layer 5 in contact with the outer surface of the covered electric wire 2 and the drain wire 3, and is bonded thereto. In other words, the covered electric wire 2 wound around the shield member 4 is held and fixed by the adhesive layer 7 that is partially present between the shield layer 5 and the covered electric wire 2 is removed from the shield member 4. Can be prevented from occurring. Therefore, there is no need to fix the covered electric wire 2 or the like by further winding the periphery of the shield member 4 around which the covered electric wire 2 or the like is wound with a tape or the like in order to prevent the electric wire from coming off. The amount can be suppressed and the cost of the shielded electric wire 1 can be prevented from rising.

  Next, a method for manufacturing the shield member 4 will be described. An aluminum laminate sheet 8 (hereinafter referred to as a laminate layer) having a flexibility and a laminate of a reinforcing layer 6 on a shield layer 5 formed in a strip shape in accordance with the shape of the shield member 4 formed as a thin strip sheet. ALS) is wound around a reel (not shown) and held.

  The ALS 8 drawn out from the reel so that the shield layer 5 faces upward is measured for each electric wire length to which the shield member 4 is vertically attached, and sent out by a measuring roller (not shown).

  A glue gun 9 that moves in one direction from one end to the other end in the width direction (C direction) of the ALS 8 is provided above the ALS 8 that is sent out, as shown in FIG. The glue gun 9 includes, for example, three nozzles 9a, and discharges the hot melt type thermoplastic adhesive attached to the glue gun 9 toward the ALS 8 while melting.

  While the glue gun 9 moves in the width direction (C direction) of the ALS 8, the ALS 8 is sent out in the D direction by a predetermined amount by the measuring roller, so that three adhesive layers are formed on the surface of the shield layer 5 that is the upper surface of the ALS 8. 7 is formed in a striped pattern obliquely with respect to the longitudinal direction (B direction) of the shield layer 5.

  The ALS 8 on which the striped adhesive layer 7 is formed is cut to a predetermined length with a cutter 10 to obtain a shield member 4 in which the adhesive layer 7 is partially formed on one surface 5a of the shield layer 5. It is done. The shielded electric wire 1 is obtained by vertically attaching the shield member 4 to the covered electric wire 2 and the drain wire 3 (not shown).

  As shown in FIG. 6, if the glue gun 9 is configured to move in one direction from the other end to the other end in the width direction (C direction) of the ALS 8, and from the other end to the one end, the upper surface of the ALS 8 can be obtained. A grid-like adhesive layer 7 formed obliquely with respect to the longitudinal direction (B direction) of the shield layer 5 can be continuously formed on the surface of the shield layer 5. It is possible to continuously form the ALS 8 having it, and to further improve workability.

  According to the shield member 4 of the present embodiment, the shield layer 5 on which the reinforcing layer 6 is laminated, and the adhesion partially formed on the one surface 5a of the shield layer 5 on the side where the reinforcing layer 6 is not laminated. And the shield layer 5 is configured to be vertically attached to the covered electric wire 2 and the drain wire 3 with the adhesive layer 7 inside, so that one surface of the shield layer 5 An adhesive layer 7 partially formed on 5a contacts and adheres to the outer surface of the covered electric wire 2 and the drain wire 3, and the covered electric wire 2 wound around the shield member 4 is the shield layer 5 It is held and fixed by the adhesive layer 7 that is partially present between the shielded electric wire 2 and the like, so that it is possible to prevent the so-called electric wire from coming off from the shield member 4. Therefore, there is no need to fix the covered electric wire 2 or the like by further winding the periphery of the shield member 4 around which the covered electric wire 2 or the like is wound with a tape or the like in order to prevent the electric wire from coming off. The amount can be reduced to prevent the cost from rising.

  The shield member 4 of the present embodiment has an adhesive layer 7 partially formed on one surface 5a on the side where the reinforcing layer 6 of the shield layer 5 is not laminated, and the shield layer 5 is bonded to the adhesive layer 7 Since the layer 7 is arranged on the inside so as to be vertically attached to the covered electric wire 2 and the drain wire 3, the shield layer 5 and the drain wire 3 are in direct contact with each other at the portion where the adhesive layer 7 is not formed. When the noise enters the inside of the electric wire from the outside of the shielded electric wire 1 and tries to enter the core wire 2a of the covered electric wire 2, the noise is transmitted to the shield layer 5, and the noise transmitted to the shield layer 5 is drained. The shield 3 can escape to the outside of the shielded electric wire 1 through the wire 3, so that the shield layer 5 can prevent the noise from entering the core wire 2 a of the covered electric wire 2. It is possible to obtain the performance.

  Further, since the adhesive layer 7 is formed in a striped pattern on the one surface 5a of the shield layer 5, the adhesive layer 7 can be prevented from being formed on the entire surface of the shield layer 5, and the shield When the member 4 is vertically attached to the covered electric wire 2 and the drain wire 3, the contact between the shield layer 5 and the drain wire 3 can be reliably obtained at a portion where the adhesive layer 7 is not formed.

  Further, since the stripe pattern of the adhesive layer 7 is formed obliquely with respect to the longitudinal direction (B direction) of the shield layer 5, the adhesive layer 7 is continuous in the longitudinal direction (B direction) of the shield layer 5. Even if the shield member 4 is cut to a predetermined length, the adhesive layer 7 is always partially formed on the one surface 5a of the shield layer 5. For this reason, the shield member 4 Can be formed continuously.

  Moreover, since the said adhesive layer 7 is comprised with the thermoplastic adhesive agent, it can be made to adhere | attach immediately by making it heat-melt at the time of use, and the productivity of the shielded electric wire 1 can be improved.

  Further, since the shield member 4 includes the shield member 4, and the shield member 4 is configured to be vertically attached to the covered wire 2 and the drain wire 3, the shield member 5 is partially provided on one surface 5 a of the shield layer 5. The adhesive layer 7 formed on the outer surface of the covered electric wire 2 and the drain wire 3 comes into contact with the outer surface and adheres to prevent the covered electric wire 2 and the like from coming out of the shield member 4. be able to. Therefore, there is no need to fix the covered electric wire 2 or the like by further winding the periphery of the shield member 4 around which the covered electric wire 2 or the like is wound with a tape or the like in order to prevent the electric wire from coming off. The amount can be suppressed and the cost of the shielded electric wire 1 can be prevented from rising.

  Further, the shielded electric wire 1 provided with the shield member 4 described above is partially formed with the adhesive layer 7 formed on the surface of the shield layer 5 on the electric wire side. When the shield layer 5 and the drain wire 3 come into direct contact with each other and noise enters the inside of the wire from the outside of the shielded wire 1 and tries to enter the core wire 2a of the covered wire 2, the noise is reflected in the shield layer 5. The noise transmitted to the shield layer 5 is released to the outside of the shielded electric wire 1 through the drain wire 3, so that the shielded electric wire 1 can obtain a sufficient shielding performance.

  The above-described embodiments are merely representative examples of the present invention, and the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention. . In the above-described embodiment, the shield member 4 in which the reinforcing layer 6 is laminated on the shield layer 5 has been described. However, the shield member 4 is not limited to the shield member 4, and the shield member 4 in which the reinforcing layer 6 is not laminated. There may be.

  Moreover, although the case where the adhesive layer 7 formed on the shield layer 5 is formed in a striped pattern obliquely with respect to the longitudinal direction (B direction) of the shield layer 5 has been described, one surface 5a of the shield layer 5 is described. As long as the adhesive layer 7 is partially formed along the longitudinal direction (B direction) of the shield layer 5, any pattern shape may be used.

It is a perspective view which shows the shield electric wire comprised by the shield member which concerns on one Embodiment of this invention vertically attached to the covered electric wire and the drain wire. It is a side view explaining the shield member of FIG. FIG. 3 is a view in the direction of the arrow X in FIG. 2. It is a perspective view explaining the state which attaches a shield member vertically to a covered electric wire and a drain wire. It is a figure for demonstrating the manufacturing method of a shielding member, and is the figure which looked at ALS from upper direction. It is a figure for demonstrating the modification of the manufacturing method of the shield member shown in FIG. 5, and is the figure which looked at ALS from upper direction. It is a perspective view which shows the conventional shielded electric wire. It is a side view explaining the conventional shield member. It is a perspective view explaining the state which winds the shield member of FIG. 8 around a covering electric wire and a drain wire. It is a side view explaining the other conventional shield member. It is a perspective view explaining the state which winds the other shield member of FIG. 10 around a covering electric wire and a drain wire.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shield electric wire 2 Covered electric wire 3 Drain wire 4 Shield member 5 Shield layer 6 Reinforcement layer 7 Adhesive layer 8 Aluminum laminate sheet (ALS)
9 Glue gun 10 Cutter

Claims (5)

A shield layer;
An adhesive layer partially formed on one surface of the shield layer, and
The shield member is configured so that the shield layer is vertically attached to the covered electric wire and the drain wire with the adhesive layer inside.   The shield member according to claim 1, wherein the adhesive layer is formed in a striped pattern on one surface of the shield layer.   The shield member according to claim 2, wherein the stripe pattern of the adhesive layer is formed obliquely with respect to the longitudinal direction of the shield layer.   The shield member according to any one of claims 1 to 3, wherein the adhesive layer is made of a thermoplastic adhesive.   A shielded electric wire comprising the shield member according to any one of claims 1 to 4, wherein the shield member is vertically attached to a covered electric wire and a drain wire.

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