Tape wrapping method and wire harness

Abstract

To improve work efficiency of a tape-winding work while securing a desired lap width.SOLUTION: A tape-winding method includes: a winding start process (step S11-step S14); a lap winding process (a step S15 and a step S16) of performing a lap winding while moving a tape set 2 where parts of adjacent tapes 21 lap over each other by a total of a tape clearance T11 and a lap width R11 as a travel for 1 round of a lap winding; and a winding end process.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a tape winding method for winding tape around a single electric wire or a bundle of electric wires, and to a wire harness wound with tape by such a tape winding method. [Background technology]

[0002] Conventionally, there has been known a tape winding method in which a single electric wire or a bundle of electric wires is wound with tape for protection or the like (see, for example, Patent Document 1). In such a tape winding method, product standards may require that the tape be partially overlapped at required locations in the length direction. The tape winding method described in Patent Document 1 employs half-lap winding, in which the tape overlaps by half width. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-067955 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the wrap winding method described above, in order to ensure the desired wrap width, the amount of tape movement per wrap is limited to the wrap width, which makes it difficult to make the tape winding process more efficient.

[0005] Therefore, the present invention has been made in view of the above-mentioned problems, and has an object to provide a tape winding method that can improve the efficiency of the tape winding work while ensuring a desired wrap width. It is also an object of the present invention to provide a wire harness that has been tape-wound by such a tape winding method. [Means for solving the problem]

[0006] In order to solve the above problems, the tape winding method is characterized by comprising: a winding start step in which a single electric wire or a bundle of multiple electric wires is used as a tape winding target, and tape is wound around a winding start point of the tape winding target using a predetermined winding method; a wrapping step following the winding start step, using a tape set in which multiple tapes are arranged in the direction of the winding axis with a predetermined tape spacing between them, and performing lap winding in a moving direction along the length of the tape winding target, so that adjacent tapes among the multiple tapes overlap each other, while moving the tape set by an amount of movement per lap winding that is the sum of the tape spacing and the lap width; and a winding end step following the lap winding step, in which tape is wound around a winding end point of the tape winding target using the same winding method as in the winding start step.

[0007] In addition, in order to solve the above-mentioned problem, a wire harness includes a tape wrapping object having one electric wire or a bundle of multiple electric wires, a winding start portion where tape is wrapped around a winding start point of the tape wrapping object using a predetermined winding method, a lap winding portion following the winding start portion, in which adjacent tapes of multiple tapes overlap each other in the length direction of the tape wrapping object, with the sum of the tape spacing and lap width being the winding length along the length direction per wrap of the lap winding of each tape, and a winding end portion following the lap winding portion where tape is wrapped around an end point of the tape wrapping object using the same winding method as the winding start portion, and is characterized in that the tape is wrapped around the end point of the tape wrapping object using the above-mentioned tape winding method. [Effects of the Invention]

[0008] According to the above-described tape winding method and wire harness, it is possible to improve the efficiency of the tape winding work while ensuring a desired wrap width. [Brief explanation of the drawings]

[0009] [Figure 1]1 is a schematic diagram showing a wire harness according to an embodiment together with a tape set used for tape winding work of the wire harness; [Figure 2] 2 is a schematic diagram showing an initial stage of processing in a tape winding method for forming the wire harness shown in FIG. 1. FIG. [Figure 3] 2 in a tape winding method for forming the wire harness shown in FIG. 1. FIG. [Figure 4] FIG. 4 is a diagram illustrating in more abstract form the tape winding method schematically shown in FIGS. 2 and 3. [Figure 5] FIG. 5 is a schematic diagram showing a modification of the embodiment shown in FIGS. 1 to 4. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of a tape winding method and a wire harness will be described below.

[0011] FIG. 1 is a schematic diagram showing a wire harness according to one embodiment together with a tape set used for winding the wire harness.

[0012] The wire harness 1 in this embodiment is mounted and routed in, for example, a vehicle or the like. The wire harness 1 is configured by wrapping tape around its outer periphery for the purpose of waterproofing, etc. The wire harness 1 includes a tape wrapping target 1a, a winding start portion 11, a lap winding portion 12, and a winding end portion 13.

[0013] The tape wrapping object 1a is an electric wire portion having one electric wire or a bundle of multiple electric wires. The winding start portion 11 is a portion where tape has been wrapped around the winding start portion of the tape wrapping object 1a using a winding method described below. The lap winding portion 12 is a portion where tape wrapping has been performed continuously in the longitudinal direction D11 of the tape wrapping object 1a as follows. The lap winding in the lap winding portion 12 is a winding method in which adjacent tapes 21 out of multiple (two in this embodiment) tapes 21 having the same tape width T11 overlap each other by a desired lap width R11 (1 / 3 of the tape width T11 in this embodiment). The winding end portion 13 is a portion where tape has been wrapped around the winding end portion of the tape wrapping object 1a following the lap winding portion 12 using the same winding method as the winding start portion 11.

[0014] For any of the winding start portion 11, the lap winding portion 12, and the winding end portion 13, tape winding is performed using a tape set 2 in which two tapes 21 having the same tape width T11 are arranged in the winding axis direction D12 with a tape spacing W11 equal to the tape width T11. This tape winding is performed by moving the tape set 2 in a moving direction D14 along the length direction D11 of the tape winding object 1a while being wound around the tape winding object 1a in a rotation direction D13.

[0015] A tape winding method for forming such a wire harness 1 will be described below.

[0016] Fig. 2 is a schematic diagram showing an initial stage of processing in a tape winding method for forming the wire harness shown in Fig. 1. Fig. 3 is a schematic diagram showing a process subsequent to the initial stage of Fig. 2 in a tape winding method for forming the wire harness shown in Fig. 1. Fig. 4 is a diagram showing a more abstracted view of the tape winding method schematically shown in Figs. 2 and 3.

[0017] 2 to 4, in step S11, stationary tape winding is performed on the tape winding target 1a two or more times (twice in this embodiment) without moving the tape set 2 in the movement direction D14. This stationary tape winding in step S11 results in the two tapes 21 being double-wound with a tape spacing W11 between them. Here, in this embodiment, the tape spacing W11 is equal to the tape width T11, and the following explanation will be given assuming this distance as the reference distance d.

[0018] In the next steps S12 and S13, a first wrapping process is performed as follows. This first wrapping process is a process in which each of the two tapes 21 in the tape set 2 performs a first wrapping process in which it partially overlaps with itself. In this embodiment, each tape 21 overlaps with itself by at least 1 / 3 width (specifically, 1 / 2 width, as described below). This first wrapping process is performed until the front edge 211 of the rear tape 21a of the two tapes 21 coincides with the rear edge 212 of the front tape 21b. The rear tape 21a is the tape 21 that is wrapped at the rearmost side in the movement direction D14, and the front tape 21b is the tape 21 that is wrapped adjacent to the rear tape 21 on the front side in the movement direction D14. In addition, the front edge 211 is the front edge of the tape 21 wound around the tape winding object 1a in the movement direction D14, and the rear edge 212 is the rear edge of the wound tape 21 in the movement direction D14.

[0019] In this embodiment, the tape spacing W11 is a reference distance d equal to the tape width T11. The first wrapping step is a step in which half-lap winding, in which each of the two tapes 21 overlaps the tape 21 by half the reference distance d, is performed twice until the following winding state is achieved: That is, the half-lap winding as the first wrapping is performed twice until the front edge 211 of the rear tape 21a coincides with the rear edge 212 of the front tape 21b. In steps S12 and S13, the tape set 2 is moved in the movement direction D14 by half the width.

[0020] In step S14, following the first wrapping step described above, a second wrapping step is performed. In the second wrapping step, the tape set 2 is moved in the moving direction D14, and a second wrapping is performed once, in which each of the two tapes 21 partially overlaps the first tape 21 and the rear tape 21a partially overlaps the front tape 21b. In this embodiment, the second wrapping is performed such that each tape 21 overlaps the first tape 21 by at least 1 / 3 of its width, specifically by 1 / 3 of its width, i.e., 1 / 3 of the reference distance d, and the rear tape 21a overlaps the front tape 21b by at least 1 / 3 of its width, specifically by 1 / 3 of its width. In this second wrapping step in step S14, the boundary between the rear tape 21a and the front tape 21b in step S13 is covered by the rear tape 21a, which is wrapped over it. In the second wrapping step in step S14, the tape set 2 is moved in the moving direction D14 by 2 / 3 of its width, i.e., 2 / 3 of the reference distance d.

[0021] The above-described processing from step S11 to step S14 constitutes a winding start step in which tape is wound around the winding start portion of the tape winding target 1b to form the winding start portion 11 shown in FIG.

[0022] In the next step S15, two adjacent tapes 21 in the tape set 2 are overlapped once in the movement direction D14. In this embodiment, the overlapping is performed such that the rear tape 21a overlaps the front tape 21b by at least 1 / 3 of the width, specifically 1 / 3 of the width, i.e., 1 / 3 of the reference distance d. At this time, the rear tape 21a is separated by 1 / 3 of the width from the previously wound rear tape 21a located behind in the movement direction D14. However, the previously wound front tape 21b is also present in this separated portion. The presence of the previously wound front tape 21b ensures that the separated portion of the rear tape 21a is overlapped. In this step S15, the tape set 2 is moved in the movement direction D14 by the sum of the tape spacing W11, which is equal to the reference distance d, and the overlap width R11, which is 1 / 3 of the reference distance d, as the movement amount per overlapping. In other words, this movement amount is 4 / 3 of the reference distance d. This movement amount is the wrapping length of each wrap winding of each tape 21 along the length direction D11.

[0023] In the next step S16, the same lap winding as in step S15 is performed. In this lap winding in step S16, the front side of the rear tape 21a overlaps the front tape 21b by 1 / 3 of the width, and the rear side overlaps the previously wound front tape 21b by 1 / 3 of the width. In this way, a lap width R11 of 1 / 3 of the width of the front tape 21b is secured for both the front and rear sides of the front tape 21b. Thereafter, the same lap winding as in step S16 is continuously performed until the winding end point of the tape winding target 1a is reached, with the tape set 2 being moved by the above-mentioned movement amount (4 / 3 of the reference distance d) per lap winding. The lap winding performed by the movement amount from step S15 onward is a lap winding process in which adjacent tapes 21 overlap each other by 1 / 3 of the width or more, while the tape set 2 is moved by the above-mentioned movement amount per lap winding. This lap winding process forms the lap winding portion 12 shown in FIG. 1.

[0024] When the tape set 2 reaches the winding end point, the lap winding process ends, and a winding end process is performed in which the tape is wound using the same winding method as the winding start process of steps S11 to S14. However, in this winding end process, first, a first lap process of two half-lap windings of steps S12 and S13, and a second lap process of step S14 are performed. After this second lap process, two immobile tape wraps of step S11 are performed. This winding end process forms the winding end portion 13 shown in FIG. 1, and the tape winding method for winding the tape on the wire harness 1 is completed.

[0025] According to the tape winding method of the embodiment described above, where lap winding is required, lap winding in which adjacent tapes 21 overlap each other partially (in this embodiment, by one-third or more of the width) is performed by moving the tape set 2 as follows. That is, here, lap winding is performed by moving the tape set 2 with the total amount of tape spacing W11 and lap width R11 being the amount of movement per lap winding. By making such movement possible, the desired lap width can be ensured while making the tape winding work more efficient compared to lap winding, etc., in which the amount of tape movement per winding is limited by the lap width.

[0026] For example, when using a 19mm wide tape and performing a half-lap winding, the tape movement per winding is 9.5mm. Even if the wrap width is reduced to 1 / 3, the tape movement per winding is limited to the wrap width, so the maximum is only 12.6mm.

[0027] In contrast, according to the tape winding method of this embodiment, the movement amount per wrap winding (4 / 3 of the reference distance d, which is equal to the tape width T11) is 25.3 mm for a 19 mm wide tape 21, improving work efficiency to 183%. Also, when a 25 mm wide tape 21 is used, the movement amount is 33.3 mm, improving work efficiency to 244%.

[0028] In this embodiment, both the winding start process and the winding finish process include a first wrapping process in steps S12 and S13, and a second wrapping process in step S14. The first wrapping process is a process in which a first wrapping process, in which each tape 21 partially overlaps with its own tape 21 (in this embodiment, by ⅓ or more of the width), is performed until the front edge 211 of the rear tape 21a coincides with the rear edge 212 of the front tape 21b. The second wrapping process is a process in which a second wrapping process, in which each tape 21 partially overlaps with its own tape 21 (in this embodiment, by ⅓ or more of the width), and the rear tape 21a partially overlaps with the front tape 21b (in this embodiment, by ⅓ or more of the width), is performed once. This configuration ensures a wrapping width of ⅓ or more not only in the wrapping process but also in the winding start process, the transition from the winding start process to the wrapping process, the transition from the wrapping process to the winding finish process, and the winding finish process.

[0029] In this embodiment, the two tapes 21 have the same tape width T11, the tape spacing W11 is a reference distance d that is equal to the tape width T11, and the first wrapping process is a process in which half-lap winding is performed twice. With this configuration, the first wrapping process, in which the movement amount of the tape set 2 is limited to half the tape width, is kept to the minimum necessary of two half-lap windings, thereby further improving the efficiency of the tape winding process, including the winding start process and winding finish process.

[0030] In this embodiment, the winding start step is a step in which stationary tape is wrapped two or more times prior to the first wrapping step, and the winding end step is a step in which stationary tape is wrapped two or more times following the second wrapping step. With this configuration, stationary tape is wrapped in both the initial step of the winding start step and the final step of the winding end step, making it possible to stabilize the winding state at the start and end of winding.

[0031] The wire harness 1 of the present embodiment is formed by winding tape around the tape winding object 1a by the above-described tape winding method. That is, according to the wire harness 1, the above-described tape winding method is adopted for its manufacture, and therefore, the desired wrap width R11 of 1 / 3 width or more can be secured, and the work efficiency of the tape winding work can be improved.

[0032] Next, a modification of the above embodiment will be described.

[0033] FIG. 5 is a schematic diagram showing a modification of the embodiment shown in FIGS.

[0034] The modified example shown in Fig. 5 differs from the above-described embodiment in the way the tape 21 is wound around the lap wound portion 32 of the wire harness 3 and the attitude of the tape set 2 relative to the tape winding target 1a during the lap winding process of forming the lap wound portion 32. Below, this modified example will be described, focusing on the differences from the above-described embodiment. Also, Fig. 5 shows only the parts of the lap wound portion 32 of the modified wire harness 3 that correspond to the illustrated contents of the lap wound portion 12 shown in Fig. 1, along with the tape set 2. In Fig. 5, elements equivalent to the elements of the embodiment shown in Fig. 1 are denoted by the same reference numerals as in Fig. 1, only when necessary for explanation. Below, a duplicated explanation of these equivalent elements will be omitted.

[0035] In the above-described embodiment, during lap winding, the tape set 2 is positioned so that each tape 21 is approximately perpendicular to the length direction D11 of the tape winding target 1a. In contrast, in this modified example, lap winding is performed by tilting the tape set 2 so that each tape 21 of the tape set 2 is wound obliquely at a predetermined angle relative to the length direction D11 of the tape winding target 1a. The lap winding is performed by moving the tilted tape set 2 in a moving direction D14 along the length direction D11 of the tape winding target 1a while rotating around the tape winding target 1a in a rotation direction D13. The lap winding portion 32 formed by this lap winding is formed so that adjacent tapes 21, each obliquely wound at a predetermined angle, partially overlap each other. At this time, the lap width R31 along the length direction D11 of the lap portion tilted in accordance with the tilt of the tape 21, is 1 / 3 of the tape width T11.

[0036] In this modified example, the lap winding portion 32 is formed by a lap winding process using the above-described diagonal winding. Although not described further, the winding start process and winding end process before and after the lap winding process are performed with the tape set 2 positioned so that each tape 21 is approximately perpendicular to the longitudinal direction D11, as in the above-described embodiment. However, the winding start process and winding end process may also be partially performed using the above-described diagonal winding. That is, the lap winding after the stationary tape winding in the winding start process and the lap winding before the stationary tape winding in the winding end process may be performed using the above-described diagonal winding.

[0037] According to the modified example described above, it goes without saying that, as with the above-mentioned embodiment, it is possible to improve the work efficiency of the tape winding work while ensuring the desired wrap width R31 (in this modified example, 1 / 3 width or more, specifically 1 / 3 width).

[0038] Furthermore, in this modified example, among the winding start process, the wrapping process, and the winding end process, at least the wrapping process (in this modified example, only the wrapping process) is performed by obliquely winding the tape set 2. With this configuration, each tape 21 of the tape set 2 is wound obliquely, so that the tape winding range in one winding is wider than when the tape 21 is wound approximately perpendicular to the length direction D11. This wider tape winding range in each winding can further improve the work efficiency of the tape winding work.

[0039] The above-described embodiment and modified examples merely show typical examples of the tape winding method and the wire harness. The tape winding method and the wire harness are not limited to these, and can be implemented in various modifications.

[0040] For example, in the above-described embodiment and modified examples, the wire harness 1 that is mounted and routed in a vehicle or the like is exemplified as an example of the wire harness. However, the wire harness is not limited to this, and there is no restriction on the specific application target.

[0041] Furthermore, in the above-described embodiment and modified examples, the tape set 2 in which two tapes 21 are arranged in the winding axis direction D12 is illustrated as an example of a tape set used in the tape winding method. However, the tape set is not limited to this, and any number of tapes may be used as long as it is plural.

[0042] Furthermore, in the above-described embodiment and modified examples, the following process is exemplified as an example of the lap winding process. That is, the lap winding processes of steps S15 and S16 are exemplified, in which adjacent tapes 21 are overlapped by at least 1 / 3 of the width, specifically 1 / 3 of the width (1 / 3 of the reference distance d). However, the lap width in the lap winding process may be any other lap width as long as it is a lap width that allows partial overlap.

[0043] Furthermore, in the above-described embodiment and modified example, as an example of each of the winding start process and the winding finish process, a process including a first wrapping process of step S12 and step S13 and a second wrapping process of step S14 is exemplified. However, the winding start process and the winding finish process are not limited to this, and any specific winding method is acceptable. However, as described above, by performing the above-described first wrapping process and the second wrapping process of step S14, it is possible to ensure the desired wrapping widths R11 and R31 (here, 1 / 3 width or more) for each of the winding start process to the winding finish process.

[0044] Furthermore, in the above-described embodiment and modified examples, the following process is exemplified as an example of the first wrapping process. That is, the first wrapping process of steps S12 and S13 is exemplified, in which the tape width T11 of the two tapes 21 in the tape set 2 is the same, the tape spacing W11 is equal to the tape width T11, and half-lap winding is performed twice. However, the first wrapping process is not limited to this, and the tape widths of the multiple tapes in the tape set may be different from one another. The tape spacing in the tape set, the corresponding wrap width, and the number of tape windings may be set arbitrarily. However, as described above, by setting the tape spacing W11 of two tapes 21 of the same width to be equal to the tape width T11 and performing two half-lap windings, the work efficiency of the tape winding work, including the winding start process and the winding end process, can be further improved.

[0045] Furthermore, in the above-described embodiment and modified example, a process of wrapping stationary tape two or more times is exemplified as an example of each of the winding start process and the winding end process. However, the winding start process and the winding end process are not limited to this, and the process may be a process in which stationary tape is not particularly wrapped. However, as described above, wrapping stationary tape two or more times can stabilize the winding state at the start and end of winding. Note that, in this embodiment, a process of wrapping stationary tape two times is exemplified in the winding start process and the winding end process, but the number of times the stationary tape is wrapped is not limited to two, and the specific number of times is not limited as long as it is two or more.

[0046] Furthermore, in the above-described modified example, as an example of the tape winding method, a tape winding method in which the lap winding process is performed by diagonal winding among the winding start process, the lap winding process, and the winding end process is exemplified. However, the tape winding method is not limited to this, and as in the above-described embodiment, the tape winding may be performed in all processes by placing the tape set 2 in an orientation in which each tape 21 is approximately perpendicular to the length direction D11 of the tape winding target 1a. Furthermore, even when diagonal winding is used, as described above, the process to which it is applied is not limited to the lap winding process, and diagonal winding may be used in the winding start process and the winding end process. [Explanation of symbols]

[0047] 1,3 Wire harness 1a Tape wrapping target 2 tape sets 11 Beginning of volume 12,32 Wrapped part 13 End of Volume 21 Tape 21a Rear Tape 21b Front Tape 211 Front edge 212 Rear edge d Reference distance D11 Lengthwise D12 Winding axis direction D13 Rotation direction D14 Movement direction R11, R31 lap width T11 tape width W11 Tape spacing

Claims

1. a winding start process for winding a tape around a start point of a winding target of one electric wire or a bundle of multiple electric wires in a predetermined winding manner; a lap winding step following the winding start step, using a tape set in which a plurality of tapes are arranged in the direction of the winding axis at a predetermined tape interval, and performing lap winding in a moving direction along the length direction of the tape to be wound, so that adjacent tapes among the plurality of tapes partially overlap each other, while moving the tape set by a movement amount per lap winding that is the sum of the tape interval and the lap width; Following the lap winding process, a winding end process is performed to wind the tape at a winding end point of the tape winding target using the same winding method as in the winding start process. A tape winding method comprising:

2. The winding start process and the winding end process are both a first wrapping step in which each of the plurality of tapes is wrapped around itself in a first wrapping manner, with each tape partially overlapping the other, until a front edge of the rear tape, which is wrapped rearmost in the moving direction among the plurality of tapes, coincides with or exceeds a rear edge of the front tape, which is wrapped adjacent to the rear tape on the front side in the moving direction; a second wrapping step of performing a second wrapping once while moving the tape set in the moving direction, in which each of the plurality of tapes partially overlaps with itself and the rear tape partially overlaps with the front tape; 2. The tape winding method according to claim 1, further comprising the steps of:

3. The plurality of tapes have the same tape width, The tape spacing is equal to the tape width, The tape winding method according to claim 2, characterized in that the first wrapping process is a process in which each of the plurality of tapes overlaps with itself by half width twice as the first wrapping process until the front edge of the rear tape coincides with the rear edge of the front tape.

4. the winding start step is a step of performing stationary tape winding two or more times prior to the first wrapping step, in which the tape is wound without moving the tape set in the moving direction, 3. The tape winding method according to claim 2, wherein the winding completion step is a step of winding the stationary tape two or more times following the second wrapping step.

5. The tape winding method according to claim 1, characterized in that, among the winding start process, the lap winding process, and the winding end process, at least the lap winding process is a process in which the lap winding is performed by tilting the tape set so that each tape of the tape set is wound diagonally at a predetermined angle relative to the longitudinal direction of the tape to be wound.

6. A tape-wound object having one electric wire or a bundle of multiple electric wires; a winding start portion where tape is wound in a predetermined manner at a winding start point of the tape winding target; a lap winding portion following the winding start portion, in which adjacent tapes among the plurality of tapes overlap each other in the length direction of the tape winding target, with the sum of the tape spacing and lap width being the winding length along the length direction per lap winding of each tape; Following the lap winding portion, a winding end portion is formed by winding the tape at the end of the tape winding target using the same winding method as the winding start portion; A wire harness comprising: a tape winding method according to any one of claims 1 to 5;

Images