JP7848904B2 - Laminated sheet - Google Patents

Description

This invention relates to a wiring member comprising a linear transmission member and a sheet member.

Patent Document 1 discloses a configuration in which insulated wires are arranged parallel to each other on a flexible resin sheet. Means for joining the insulated wires and the flexible resin sheet include heat-pressure welding.

Japanese Utility Model Publication No. 58-192408

It is preferable to select a flexible resin sheet made of a material suitable for bonding with insulated wires. For example, consider bonding the insulated wire and the flexible resin sheet using a heat-pressure welding method. In this case, it is preferable to use a flexible resin sheet that readily welds to the insulated wire's coating, for example, using the same resin material as the insulated wire's coating.

However, selecting a flexible resin sheet suitable for bonding with insulated wires may result in inferior performance in other areas. In such cases, it is possible to compensate for these other performance shortcomings by layering another sheet on top of the flexible resin sheet.

However, depending on the material combination of the soft resin sheet and other sheets, it may not be possible to overlap and securely fasten them together.

Therefore, the present invention aims to enable the secure attachment of a second sheet member to a first sheet member on which an electric wire is fixed by overlapping the second sheet member.

To solve the above problem, the laminated sheet comprises a first sheet member and a second sheet member fixed to the other main surface side of the first sheet member. A space is formed in one of the first and second sheet members, into which the other can melt and fill. The first and second sheet members are superimposed on each other in a solidified state where the other of the first and second sheet members has melted and filled the space in the first sheet member.

Because the first and second sheet members are superimposed on each other in a state where one melts and fills the space between the two sheet members and solidifies, the first and second sheet members can be firmly superimposed and fixed. Furthermore, since the first and second sheet members can be superimposed regardless of the quality of their adhesion due to chemical interaction, for example, the first sheet member can be made of a material suitable for fixing to other members, while the second sheet member can be configured to ensure other functions.

This is a schematic perspective view showing a wiring member according to an embodiment. This is a partial cross-sectional view along line II-II in Figure 1. This is an explanatory diagram showing one step in the manufacturing process of wiring components. This is a schematic perspective view showing a wiring member related to the first modified example. This is a schematic perspective view showing a wiring member related to the second modified example. This is a partial cross-sectional view showing a wiring member related to the deformation described above. This is an explanatory diagram showing an example of a wiring component made of a material that changes color due to heat.

The wiring member and laminated sheet according to the embodiment will be described below.

Figure 1 is a schematic perspective view showing the wiring member 10, and Figure 2 is a partial cross-sectional view taken along line II-II in Figure 1.

The wiring member 10 comprises a linear transmission member 20 and a laminated sheet 30. The laminated sheet 30 is constructed by laminating a first sheet member 32 and a second sheet member 36.

The linear transmission member 20 can be any linear member that transmits electricity or light, etc. For example, the linear transmission member 20 may be a general electric wire having a core wire and a covering around the core wire, or it may be a shielded wire, enameled wire, nichrome wire, optical fiber, etc. As a linear transmission member that transmits electricity, it may be various signal lines or various power lines. A linear transmission member that transmits electricity may also be used as an antenna, coil, etc., for sending signals or power to or receiving them from space.

Here, the linear transmission member 20 is assumed to be a general-purpose electric wire 20 (hereinafter simply referred to as "electric wire 20"). The electric wire 20 has a core wire 24 as the transmission line body and an insulating sheath 26 as the covering 24. The descriptions of the electric wire 20 are applicable to each example of the linear transmission member 20, except for configurations to which it is not applicable.

The core wire 24 is composed of one or more strands. The strands are made of conductors such as copper, copper alloy, aluminum, or aluminum alloy. If the core wire 24 is composed of multiple strands, the strands may be twisted together. The insulating coating 26 is formed by extruding a resin material such as PVC (polyvinyl chloride) or PE (polyethylene) around the core wire 24. Here, the electric wire 20 is a so-called round electric wire with a circular cross-section.

Here, multiple (three in Figure 1) electric wires 20 are fixed to the laminated sheet 30 in a parallel configuration. The electric wire 20 may be a single wire or multiple wires. The electric wire 20 may be bent and fixed on the laminated sheet 30. Multiple electric wires 20 may be fixed to the laminated sheet 30 in a way that allows them to branch off midway.

The laminated sheet 30 is a sheet-like member on which the electric wire 20 is fixed to the main surface 31. By fixing the electric wire 20 to the main surface 31 of the laminated sheet 30, the electric wire 20 is held along a predetermined path on the main surface 31. The laminated sheet 30 may have flexibility that allows it to be easily bent, or it may be a member with sufficient rigidity to maintain a certain shape.

The laminated sheet 30 is constructed by laminating a first sheet member 32 and a second sheet member 36.

The first sheet member 32 is a sheet-like member. Here, the first sheet member 32 is formed in an elongated rectangular shape. The electric wire 20 is fixed to one main surface 33 of this first sheet member 32.

The second sheet member 36 is a sheet-like member. Here, the first sheet member 32 is formed in an elongated rectangular shape. The second sheet member 36 is fixed to the other main surface 34 of the first sheet member 32 in an overlapping state.

Here, the first sheet member 32 and the second sheet member 36 have the same shape, and the second sheet member 36 is fixed to the entire other main surface 34 of the first sheet member 32. Alternatively, the first sheet member may be larger than the second sheet member, and the second sheet member may be fixed to a portion of the other main surface of the first sheet member. Conversely, the first sheet member may be smaller than the second sheet member, and the first sheet member may be fixed to a portion of one main surface of the second sheet member.

Since the electric wire 20 is fixed to the first sheet member 32, the first sheet member 32 is considered more suitable for fixing the electric wire 20 compared to the second sheet member 36.

If a material suitable for fixing the electric wire 20 is used as the first sheet member 32, there is a risk that some function may be insufficient or lacking. Therefore, the second sheet member 36 is used to reinforce or add some function to the first sheet member 32.

The method of fixing the electric wire 20 to the first sheet member 32 may be by fixing it at a contact point, by fixing it at a non-contact point, or by using both methods in combination.

Here, "contact area fixing" refers to a situation where the portion where the linear transmission member (electric wire 20) and the first sheet member 32 come into contact is fixed together. "Non-contact area fixing," on the other hand, refers to a fixing method other than contact area fixing. For example, another fixing member may press the linear transmission member (electric wire 20) toward the first sheet member 32, thereby maintaining the linear transmission member (electric wire 20) and the first sheet member 32 in a fixed state.

The method of fixing the contact area may be indirect, direct, or a combination of both in different regions. Indirect fixing refers to the linear transmission member (electric wire 20) and the first sheet member 32 being indirectly attached and fixed via an intervening material such as an adhesive, tack, or double-sided adhesive tape. Direct fixing refers to the linear transmission member (electric wire 20) and the first sheet member 32 being directly attached and fixed without the use of a separate adhesive. In direct fixing, for example, the resin contained in at least one of the linear transmission member (electric wire 20) and the first sheet member 32 may be dissolved to achieve adhesion and fixation.

In forming the state of direct fixation of the contact area, the resin may be melted by heat or by a solvent. In other words, the state of direct fixation of the contact area may be achieved by heat or by a solvent. Preferably, it is achieved by heat.

The means used to form the state of direct fixation of the contact points are not particularly limited, and various means, including known means such as welding, fusion, and other welding methods, can be used. For example, when forming the state of direct fixation of the contact points by heat through welding, various welding methods such as ultrasonic welding, heat-pressure welding, hot air welding, and high-frequency welding can be employed. Furthermore, once the state of direct fixation of the contact points is formed by these means, the linear transmission member (electric wire 20) and the first sheet member 32 are in a state of direct fixation of the contact points by that means. Specifically, for example, when the state of direct fixation of the contact points is formed by ultrasonic welding, the linear transmission member (electric wire 20) and the first sheet member 32 are in a state of direct fixation of the contact points by ultrasonic welding. The portion where the state of direct fixation of the contact points by heat is formed by welding (the fixed portion between the linear transmission member (electric wire 20) and the first sheet member 32) may be called the welded portion, and the portion fixed by ultrasonic welding may be called the ultrasonic welded portion, the portion fixed by heat-pressure welding may be called the heat-pressure welded portion, and so on.

In the case of direct fixing of the contact points, either only the resin contained in the coating of the linear transmission member (electric wire 20) may melt, or only the resin contained in the first sheet member 32 may melt. In these cases, the melted resin may adhere to the outer surface of the other and solidify, forming a relatively clear interface. Furthermore, in the case of direct fixing of the contact points, both the resin contained in the coating of the linear transmission member (electric wire 20) and the resin contained in the first sheet member 32 may melt. In this case, the two resins may mix together, preventing the formation of a clear interface. This is especially true when the coating of the linear transmission member (electric wire 20) and the first sheet member 32 contain easily miscible resins, such as the same resin material; in such cases, the two resins may mix together, preventing the formation of a clear interface.

As an example of non-contact fixing, it is conceivable that the linear transmission member (electric wire 20) and the sheet material are fixed together by, for example, using sewing thread, another sheet material, or adhesive tape to press the linear transmission member (electric wire 20) toward the first sheet material 32.

Given the above-described fixing configurations, the significance of the first sheet member 32 being more suitable for fixing the electric wire 20 compared to the second sheet member 36 can be considered, for example, as follows:

As an example of indirect fixing of contact points, consider a configuration in which a linear transmission member (electric wire 20) and a first sheet member 32 are adhesively fixed to each other via an adhesive material such as an adhesive agent or double-sided adhesive tape provided between them. In this case, the first sheet member 32 is more suitable for fixing the electric wire 20 than the second sheet member 36. Therefore, when the adhesive material is applied to both the first and second sheet members 32, it can be assumed that the adhesive force to the first sheet member 32 is greater than the adhesive force to the second sheet member 36. Generally, the adhesive force of an adhesive material is low for materials with rough surfaces or surfaces with fine structures that can be separated on the surface, such as nonwoven fabrics.

As an example of indirect fixing of contact points, consider a configuration in which a linear transmission member (electric wire 20) and a first sheet member 32 are fixed together by an adhesive provided between them. In this case, it may be considered that the adhesive strength of the first sheet member 32 is greater than that of the second sheet member 36 when applied to an adhesive suitable for bonding the linear transmission member (electric wire 20). Generally, adhesives exhibit good adhesion to materials with good compatibility (affinity), and in particular, good adhesion to resins of the same type. Therefore, it is preferable to use resins of the same type for the coating of the linear transmission member (electric wire 20) and the first sheet member 32.

As an example of fixing the contact area, we consider a configuration in which the linear transmission member (electric wire 20) and the first sheet member 32 are fixed by melting and solidifying the resin surface of at least one of them. As described above, at least one of the resin surfaces of the linear transmission member (electric wire 20) and the first sheet member 32 may be melted by heat or by a solvent. In this case, it can be assumed that the bonding force when at least one of the resin surface (coating) of the linear transmission member (electric wire 20) and the resin surface of the first sheet member 32 melts and solidifies and the two stick together is greater than the bonding force when at least one of the resin surface (coating) of the linear transmission member (electric wire 20) and the resin surface of the second sheet member 36 melts and solidifies and the two stick together. Generally, if the resin materials have good compatibility (affinity), they will exhibit good bonding force when at least one of them melts, and in particular, if they are resin materials of the same type, they will exhibit good bonding force. Therefore, it is preferable that the surface portion (coating) of the linear transmission member (electric wire 20) and the first sheet member 32 be made of the same type of resin. In other words, the compatibility between the resin of the surface portion of the linear transmission member and the resin of the first sheet member 32 should be better than the compatibility between the resin of the surface portion of the linear transmission member and the resin of the second sheet member 36.

As a non-contact fixing method, consider a configuration where the sewing thread surrounds the linear transmission member (electric wire 20) and sews it to the first sheet member 32, thereby sewing the linear transmission member (electric wire 20) to the first sheet member 32. In this case, the first sheet member 32 is less likely to tear than the second sheet member 36 due to the sewing thread, and therefore, the linear transmission member (electric wire 20) sewn to the first sheet member 32 by the sewing thread can be considered to be more firmly fixed than in a configuration where it is sewn to the second sheet member 36 using the same method.

As a non-contact fixing method, consider a configuration in which a sheet material, adhesive tape, etc., is fixed to the first sheet member 32 while covering the linear transmission member (electric wire 20), thereby fixing the linear transmission member (electric wire 20) to the first sheet member 32. In this case, if another sheet material, adhesive tape, etc., is fixed to the first sheet member 32 via an adhesive member, it may be considered that the adhesive force of the other sheet material, adhesive tape, etc., to the first sheet member 32 is greater than the adhesive force to the second sheet member 36.

In the cases where the sheet material for pressing is fixed to the first sheet member 32 by adhesive, where the sheet material for pressing is fixed to the first sheet member 32 by sewing thread, and where the sheet material for pressing is fixed by melting at least one of the resin surfaces of the sheet material or the first sheet member 32, the above concept regarding the fixing method between the covering of the linear transmission member (electric wire 20) and the first sheet member 32 can be applied.

In summary, the reason why the first sheet member 32 is more suitable for fixing the linear transmission member (electric wire 20) compared to the second sheet member 36 can be understood as follows: That is, when the linear transmission member (electric wire 20) is fixed to the first sheet member 32 and the second sheet member 36 with the same configuration, the fixing force of the linear transmission member (electric wire 20) to the first sheet member 32 is greater than the fixing force of the linear transmission member (electric wire 20) to the second sheet member 36.

Here, we will describe an example in which the linear transmission member (electric wire 20) is directly fixed to the first sheet member 32 at the contact point; more specifically, in an example in which at least one resin surface of the linear transmission member (electric wire 20) and the first sheet member 32 melts and solidifies, thereby fixing the linear transmission member (electric wire 20) to the first sheet member 32.

In this case, as described above, it may be considered that the bonding force when at least one of the resin surfaces (coating) of the linear transmission member (electric wire 20) and the resin surface of the first sheet member 32 melts and solidifies, causing them to stick together, is greater than the bonding force when at least one of the resin surfaces (coating) of the linear transmission member (electric wire 20) and the resin surface of the second sheet member 36 melts and solidifies, causing them to stick together.

The material constituting the first sheet member 32 is not particularly limited as long as it satisfies the above conditions. For example, the first sheet member 32 may be formed from a resin-containing material such as PVC (polyvinyl chloride), PET (polyethylene terephthalate), or PP (polypropylene). The suitability of each material should be determined in relation to the material of the resin surface (coating) of the linear transmission member (electric wire 20).

As described above, it is preferable that the resin surface (coating) of the linear transmission member (electric wire 20) and the first sheet member 32 be made of the same type of resin. For example, if the coating 26 of the electric wire 20 is formed of a resin mainly composed of PVC (polyvinyl chloride), it is preferable that the first sheet member 32 be formed of a resin mainly composed of PVC (polyvinyl chloride).

Furthermore, in this case, the first sheet member 32 is a sheet-like member with a uniformly filled interior.

As described above, if the material of the first sheet member 32 is selected from the viewpoint of suitability for fixing the electric wire 20, it may result in some desirable functions of the wiring member being insufficient or lacking in some function.

For example, consider the case where the first sheet member 32 is formed from a resin primarily composed of PVC (polyvinyl chloride), matching the material of the wire's insulation 26, as described above. In this case, because PVC (polyvinyl chloride) is a highly elastic resin, it may not be able to adequately withstand the tensile force applied to the wiring member 10, potentially resulting in a significant tensile force acting on the wire 20 itself.

Therefore, the second sheet member 36 is superimposed on the first sheet member 32 and fixed in place. Since the second sheet member 36 is selected for the purpose of supplementing or adding some function to the first sheet member 32, it is possible that a sheet member unsuitable for fixing the electric wire 20 may be selected. Furthermore, since the first sheet member 32 is selected for its suitability for fixing to the electric wire 20, it is possible that the second sheet member 36 may not be suitable for superimposing and fixing to the first sheet member 32.

For example, as described above, the first sheet member 32 is selected to be made of a resin mainly composed of PVC (polyvinyl chloride) to match the material of the insulation 26 of the electric wire 20. In this case, since the first sheet member 32 will be easily stretched, it is preferable to select a material that is not easily stretched for the second sheet member 36. For example, the second sheet member 36 is made of a resin that is not easily stretched, such as PP (polypropylene), PET (polyethylene terephthalate), or PE ( polyethylene ).

Next, we consider fixing the first sheet member 32 and the second sheet member 36 together by melting the resin surface of at least one of them. In this case, the first sheet member 32, which is made of a resin mainly composed of PVC (polyvinyl chloride), will not adhere well to the second sheet member 36, which is made of a resin such as PP (polypropylene), PET (polyethylene terephthalate), or PE ( polyethylene ), and the two may easily peel apart.

Therefore, the second sheet member 36 is made from the first sheet member 32, which has a space that can be filled by melting. The first sheet member 32 melts, fills the space in the second sheet member 36, and solidifies, resulting in a state where the first sheet member 32 and the second sheet member 36 are superimposed.

Here, a nonwoven sheet material is used as the second sheet material 36. The nonwoven sheet material is a material formed in a sheet shape by the intertwining of multiple fibers 37 without weaving. If a resin that is less stretchable than the resin constituting the first sheet material 32 is used as the fibers 37, for example, PP (polypropylene), PET (polyethylene terephthalate), PA (polyamide), PE ( polyethylene ), etc., the nonwoven sheet material itself will also become less stretchable. Therefore, by overlapping and joining the second sheet material 36 formed from such a nonwoven sheet material to the first sheet material 32, the laminated sheet 30 itself will also become less stretchable. The nonwoven sheet material may contain an adhesive resin called a binder. The adhesive resin has a melting point lower than the melting point of the fibers 37 and plays the role of sticking the fibers 37 together. The adhesive resin may cover all or part of the multiple fibers, or it may be mixed separately from the fibers in fibrous or granular form.

The second sheet member 36, formed from a nonwoven sheet material, has spaces 38 formed between multiple fibers 37. These spaces 38 are spaces that the first sheet member 32 can melt and fill.

It is preferable to make the melting point of the second sheet member 36, formed from the nonwoven sheet material, higher than that of the first sheet member 32. That is, in order to melt and fill the space 38 of the second sheet member 36 with the first sheet member 32, it is preferable that the space 38 remains intact without collapsing while the first sheet member 32 is melted. To achieve this, it is preferable to make the melting point of the fibers 37 of the second sheet member 36 higher than that of the first sheet member 32.

For example, the first sheet member 32 could be formed from a resin primarily composed of PVC (polyvinyl chloride) with a melting point of 85 to 210 degrees Celsius, while the fibers of the second sheet member 36 could be made of PP (polypropylene) with a melting point of approximately 250 degrees Celsius.

Furthermore, it is not essential that the melting point of the fibers 37 be higher than that of the first sheet member 32. The melting point of the adhesive resin does not need to be higher than that of the first sheet member 32. The melting point of the second sheet member 36 is the temperature of the main portion (fibers 37) that forms the space 38.

The first sheet member 32 and the second sheet member 36 can be overlapped and fixed together, for example, as shown in Figure 3.

First, prepare the first sheet member 32 and the second sheet member 36. Then, with the first sheet member 32 and the second sheet member 36 overlapping, sandwich them between the first press member 50 and the second press member 52. A heater 54 is provided on at least one of the first press member 50 and the second press member 52. To primarily heat the first sheet member 32, it is preferable that the heater 54 be provided at least on the side of the first press member 50 that presses the first sheet member 32.

When the first sheet member 32 and the second sheet member 36 are pressed and heated together by the first press member 50 and the second press member 52, at least a portion of the first sheet member 32 melts. The melted portion of the first sheet member 32 then flows into the spaces 38 of the fibers 37 in the second sheet member 36, filling those spaces.

After heating is stopped, the portion of the first sheet member 32 that has melted and filled the space 38 solidifies, and the first sheet member 32 and the second sheet member 36 become fixed in an overlapping state.

When heating the first sheet member 32, the entire first sheet member 32 may melt, or only a portion of the side closer to the second sheet member 36 may melt. The melted portion of the first sheet member 32 may fill only the space 38 on the first sheet member 32 side of the second sheet member 36, or it may fill the entire space 38 in the thickness direction of the second sheet member 36. In Figure 2, the first sheet member 32 has melted and solidified, filling the space 38 on the first sheet member 32 side of the second sheet member 36, while at least a portion of the space 38 remains in the part of the second sheet member 36 away from the first sheet member 32.

The first sheet member 32 and the second sheet member 36 may be fixed together across their entire contact surface, or they may be fixed together at partial fixing points or areas.

The electric wire 20 may be fixed to the first sheet member 32 before fixing the first sheet member 32 and the second sheet member 36, or it may be fixed after fixing the first sheet member 32 and the second sheet member 36. If the first sheet member 32 and the second sheet member 36 are fixed after the electric wire 20 has been fixed to the first sheet member 32, the first sheet member 32 and the second sheet member 36 may be pressurized and heated, avoiding the fixing points of the electric wire 20.

The material and properties of the second sheet member 36 vary depending on the desired function to be supplemented or added to the first sheet member 32. For example, if the purpose is to supplement or add sound insulation, cushioning, etc., the second sheet member 36 may be a nonwoven sheet member made of easily stretchable fibers. Alternatively, if the purpose is to supplement or add rigidity, for example, the second sheet member 36 may be a sheet with higher rigidity than the first sheet member 32.

With the wiring member 10 and laminated sheet 30 configured in this way, the first sheet member 32 is more suitable for fixing the electric wire 20 compared to the second sheet member 36, thus allowing the electric wire 20 to be securely fixed to the first sheet member 32.

Furthermore, since the first sheet member 32 melts and fills the space 38 of the second sheet member 36 and solidifies, and the first sheet member 32 and the second sheet member 36 are superimposed, the anchoring effect fixes the first sheet member 32 to the second sheet member 36, increasing the peel strength and allowing them to be firmly superimposed and fixed together. In other words, since the first sheet member 32 and the second sheet member 36 are fixed primarily by physical action, the second sheet member 36 can be selected from any material without considering chemical adhesion to the electric wire 20 or the first sheet member 32, making it easy to add or complement any desired functions.

Furthermore, if the melting point of the first sheet member 32 is higher than that of the second sheet member 36, when the first sheet member 32 and the second sheet member 36 are superimposed and pressurized and heated, the first sheet member 32 melts easily while the space 38 remains in the second sheet member 36. Therefore, the first sheet member 32 can be easily fixed in a solidified state after melting and filling the space 38 in the second sheet member 36. This allows the first sheet member 32 and the second sheet member 36 to be superimposed and fixed more securely.

Furthermore, since the first sheet member 32 is a sheet-like member with a uniformly filled interior, it is easy to securely fix the linear electric wire 20 to the first sheet member 32. Also, since the second sheet member 36 is a nonwoven sheet member, numerous spaces 38 are formed between multiple intertwined fibers 37, and the melted first sheet member 32 easily fills these numerous spaces 38. Moreover, in this state, the multiple fibers 37 become intricately embedded inside the melted first sheet member 32, making it difficult for the melted first sheet member 32 to escape from the spaces 38 between the multiple fibers 37. For this reason, the first sheet member 32 and the second sheet member 36 can be firmly overlapped and fixed together.

Furthermore, in the second sheet member 36, which is a nonwoven sheet material, the space on the side of the first sheet member 32 is filled and solidified by the melted first sheet member 32, while a space 38 remains in the portion of the second sheet member 36 away from the first sheet member 32. Therefore, protective and sound-insulating performance can be obtained from the nonwoven sheet material.

Furthermore, if the resin material of the first sheet member 32 and the resin material on the surface of the linear transmission member (electric wire 20) (the material of the coating 26) are made of the same type of resin, it becomes easier to firmly fix the surface (coating 26) of the linear transmission member (electric wire 20) to the first sheet member 32.

For example, if the surface portion of the linear transmission member (the covering 26 of the electric wire 20) and the first sheet member 32 are formed from a resin mainly composed of polyvinyl chloride, the two can be firmly fixed together. Furthermore, if the second sheet member 36 is formed from a resin that is less stretchable than the first sheet member 32 (for example, less stretchable PP (polypropylene), PET (polyethylene terephthalate), PE ( polyethylene ), etc.), the laminated sheet 30 as a whole can be made less stretchable, and when a tensile force is applied to the wiring member 10, this force can be absorbed by the laminated sheet 30, making it less likely for the tensile force to act on the electric wire 20.

{Variations}
Based on the above embodiment, various modifications will be described.

In the above embodiment, the first sheet member 32 is a sheet-like member with a uniformly filled interior, and the second sheet member 36 is a nonwoven sheet member.

Conversely, as shown in the first modified example wiring member 110 in Figure 4, the first sheet member 132 to which the electric wire 20 is fixed may be a nonwoven sheet member, and the second sheet member 136 may be a sheet-like member with a uniformly filled interior. Even in this case, if the first sheet member 132 is suitable for fixing the electric wire 20, the electric wire 20 can be firmly fixed to the first sheet member 132, and the first sheet member 132 and the second sheet member 136 can be firmly overlapped and fixed.

For example, the covering 26 of the electric wire 20 and the first sheet member 132, which is a nonwoven sheet member, may be made of the same resin material such as polyvinyl chloride (PVC), so that the two are a combination suitable for fixing. Alternatively, for example, the second sheet member 136 may be made of a material that does not stretch easily, such as PP (polypropylene), PET (polyethylene terephthalate), or PE ( polyethylene ), to add resistance to stretching.

In other words, the first sheet member to which the electric wire is fixed may be a member having a gap, and the second sheet member may melt and fill the gap, then solidify.

Furthermore, although the above embodiment described an example where the second sheet member 36 having the space 38 is a nonwoven sheet member, the second sheet member can be any member having a space into which the first sheet member can melt, fill, and solidify.

For example, in the wiring member 210 according to the second modified example shown in Figure 5, a mesh-like member is used as the second sheet member 236. Figure 5 shows the state before the second sheet member 236 is fixed to the first sheet member 32. The mesh-like second sheet member 236 has spaces 238 between the linear members that are combined vertically and horizontally. In other words, the mesh is the spaces 238. The second sheet member 236 adds or complements the function of the first sheet member 32, similar to the embodiment described above. For example, the second sheet member 236 may be made of a material that does not stretch easily, such as PP (polypropylene), PET (polyethylene terephthalate), PE ( polyethylene ), or metal.

Then, similar to the embodiment described above, when the first sheet member 32 and the second sheet member 236 are overlapped, pressurized, and heated, as shown in Figure 6, the first sheet member 32 melts and fills the space 238 (mesh) of the second sheet member 236, where it solidifies. Therefore, the electric wire 20 can be securely fixed to the first sheet member 32, while the first sheet member 32 and the second sheet member 236 are securely overlapped and fixed together.

The second sheet member can be any sheet with spaces formed within it. Besides the mesh described above, it may also be a woven fabric made by combining threads vertically and horizontally, or a fabric woven from threads. Because spaces are formed between the combined or woven threads in the woven fabric or mesh, the first sheet member can be melted and filled into these spaces, allowing it to solidify. Furthermore, the second sheet member may have holes penetrating through to the front and back, or a bottomed recess, where the internal space of the hole or the bottomed recess is the space into which the first sheet member melts, fills, and solidifies.

Furthermore, when fixing the electric wire 20 and the first sheet member 32 by melting them with heat, it is preferable to be able to confirm whether the electric wire 20 and the first sheet member 32 have been properly heated and securely fixed together.

To achieve this, it is advisable to provide a heat-sensitive material on at least one of the following: the first sheet member 32, which is the sheet to which the electric wire 20 is fixed, and the insulation 26 of the electric wire 20 (the resin forming the surface of the linear transmission member), as shown in the wiring member 310 in Figure 7. The heat-sensitive material may be mixed into the material forming the first sheet member 32 or the insulation 26, or it may be attached to their surfaces.

It is preferable that the heat-sensitive material changes color at a predetermined temperature above the temperature at which the contact portion between the electric wire 20 and the first sheet member 32 should be heated when the electric wire 20 and the first sheet member 32 are fixed together by heat (for example, the lower of the melting points of the electric wire 20 and the first sheet member 32).

The material that changes color due to heat may change color irreversibly or reversibly. To inspect whether heat has been properly applied to the electric wire 20 and the first sheet member 32 even after a certain amount of time has elapsed since processing, it is preferable that the material that changes color due to heat changes color irreversibly. If the material that changes color due to heat changes color reversibly, it is preferable to inspect it visually during or immediately after heat processing, or using an image processing inspection device that has the function of capturing images with a camera and extracting the discolored areas.

Materials that change color irreversibly include compound pigments containing cobalt, nickel, copper, etc., whose composition changes and changes color due to thermal decomposition or other processes. For example, well-known irreversible thermochromic coatings can be used as such materials.

As materials that reversibly change color, paints that utilize physical changes such as the transition of the crystalline system of a compound can be used. For example, paints using mercury(II) iodide salts can be used. As such materials, well-known irreversible thermochromic paints (such as Thermocolor, Temp-Alarm, and Thermopaint) can be used.

In this example, when the electric wire 20 and the first sheet member 32 are heated and fixed together, the area 350 that is thoroughly heated will change color due to the heat. In contrast, the area 352 that is thoroughly heated will remain its original color or show only slight discoloration. Therefore, it is possible to visually confirm whether the fixing has been properly performed by applying sufficient heat.

In Figure 7, the electric wire 20 is fixed to the first sheet member 32 at multiple points; however, the electric wire 20 may also be fixed to the first sheet member 32 along its entire longitudinal direction.

This configuration is not limited to the wiring member 10 described in the above embodiment, but is broadly applicable when fixing a linear transmission member (electric wire 20) to a sheet-like member.

At least one of the first sheet member 32 and the second sheet member 36 may be provided with a material that changes color with heat, allowing for inspection of whether heat has been applied to a desired location or area when the two are fixed together.

Furthermore, the configurations described in the above embodiments and each of the modified examples can be combined as appropriate, as long as they do not contradict each other. For example, the first modified example and the second modified example can be combined, and a mesh-like material can be used as the first sheet member to which the electric wire 20 is fixed, and a sheet-like material with a uniformly filled interior can be used as the second sheet member.

Although this invention has been described in detail above, the above description is illustrative in all respects, and the invention is not limited thereto. It is understood that countless variations not illustrated can be conceivable without falling outside the scope of this invention.

This disclosure discloses the following aspects:

The wiring member according to the first embodiment comprises a linear transmission member, a first sheet member to which the linear transmission member is fixed on one main surface, and a second sheet member fixed to the other main surface side of the first sheet member. The first sheet member is more suitable for fixing the linear transmission member compared to the second sheet member. A space is formed in one of the first and second sheet members, into which the other can melt and fill. The first and second sheet members are superimposed on each other in a state where the other sheet member has melted and filled the space in the first sheet member and solidified.

The second embodiment is a wiring member according to the first embodiment, wherein the melting point of one of the first and second sheet members is higher than the melting point of the other.

The third embodiment is a wiring member according to the first or second embodiment, wherein the first sheet member is a sheet-like member with a uniformly filled interior, and the second sheet member is a nonwoven sheet member containing a plurality of fibers, with spaces formed between the plurality of fibers, and the first sheet member and the nonwoven sheet member are superimposed in a state where the first sheet member has melted and filled the spaces of the nonwoven sheet member and solidified.

The fourth embodiment is a wiring member according to the third embodiment, wherein the first sheet member melts and fills the space on the side of the nonwoven sheet member with the first sheet member, and solidifies, while the space remains in the portion of the nonwoven sheet member away from the first sheet member.

The fifth embodiment is a wiring member relating to any one of the first to fourth embodiments, wherein the first sheet member is formed of the same type of resin as the coating of the linear transmission member.

The sixth embodiment is a wiring member according to any one of the first to fifth embodiments, wherein the coating of the linear transmission member and the first sheet member are formed of a resin mainly composed of polyvinyl chloride, and the second sheet member is formed of a resin that is less stretchable than the first sheet member.

The laminated sheet according to the seventh embodiment comprises a first sheet member and a second sheet member fixed to the other main surface side of the first sheet member. A space is formed in one of the first and second sheet members, into which the other can melt and fill. The first and second sheet members are superimposed on each other in a solidified state where the other sheet member has melted and filled the space in the first sheet member.

According to the first embodiment, the linear transmission member can be securely fixed to the first sheet member. Furthermore, since the first and second sheet members are superimposed on each other in a state where the other material has melted, filled, and solidified into the space between them, the first and second sheet members can be securely superimposed and fixed.

According to the second embodiment, when the first sheet member and the second sheet member are heated in a stacked state, the other sheet member tends to melt first. Therefore, it is easy to process the material so that the other sheet member melts and fills the space between the first and second sheet members, resulting in a solidified state.

According to the third embodiment, the linear transmission member can be easily and stably fixed to the first sheet member, which is a sheet-like material with a uniformly filled interior. Furthermore, since the first sheet member and the nonwoven sheet member are superimposed in a state where the first sheet member has melted and solidified, filling the spaces between the multiple fibers of the nonwoven sheet member, the first sheet member and the nonwoven sheet member can be kept firmly superimposed.

According to the fourth embodiment, since a space remains in the portion of the nonwoven sheet member that is separated from the first sheet member, protective performance and sound insulation can be obtained from the nonwoven sheet member.

According to the fifth embodiment, since the first sheet member is formed of the same type of resin as the coating of the linear transmission member, the coating of the linear transmission member can be easily and securely fixed to the first sheet member.

According to the sixth embodiment, the covering of the linear transmission member and the first sheet member are easily fixed together. Furthermore, because polyvinyl chloride is easily stretched, the second sheet member, formed from a resin less stretchable than the first sheet member, can make the overlapping first and second sheet members less prone to stretching.

According to the seventh embodiment, since the first and second sheet members are superimposed on each other in a state where one sheet member has melted and filled the space between the two and solidified, the first and second sheet members can be firmly superimposed and fixed. Furthermore, since the first and second sheet members can be superimposed regardless of the quality of adhesion due to chemical interaction, for example, the first sheet member can be made of a material suitable for fixing to other members, and the second sheet member can be configured to ensure other functions.

10, 110, 210 Wiring components 20 Electric wires (linear transmission components)
26 Covering 30 Laminated sheet 32, 132 First sheet member 33 One main surface of the first sheet member 34 Other main surface of the first sheet member 36, 136, 236 Second sheet member 37 Fiber 38, 238 Space

Claims (4)

First sheet member and
A second sheet member fixed to the other main surface side of the first sheet member,
A linear transmission member fixed to the first sheet member is exposed on the first sheet member,
Equipped with,
A space is formed in one of the first sheet member and the second sheet member that can be filled by the other sheet member melting.
The first sheet member and the second sheet member are superimposed on each other in a solidified state in which the other sheet member has melted and filled the space of the first sheet member .
A laminated sheet in which the first sheet member is formed of a resin containing polyvinyl chloride, and the second sheet member is formed of a resin containing polypropylene, polyamide, polyethylene terephthalate, or polyethylene . A laminated sheet according to claim 1,
A laminated sheet in which the melting point of one of the first sheet member and the second sheet member is higher than the melting point of the other. A laminated sheet according to claim 1 or claim 2,
The first sheet member is a sheet-like member with a uniformly filled interior.
The second sheet member is a nonwoven sheet member that includes a plurality of fibers, and the spaces are formed between the plurality of fibers.
A laminated sheet in which the first sheet member and the nonwoven sheet member are superimposed on each other, with the first sheet member melted and solidified in the space of the nonwoven sheet member. The laminated sheet according to claim 3,
In the nonwoven sheet member, the first sheet member melts and fills the space on the side of the first sheet member, and then solidifies.
A laminated sheet in which the space remains in the portion of the nonwoven sheet member that is separated from the first sheet member.