Tape winding machine

Abstract

Provided is a tape winding machine that can suppress twisting of an object and wrinkling of a tape with a simple device configuration and enables suitable tape winding. 【Solution means】 A rotatable arm provided with a tape holding part that is movable in the radial direction of the rotation diameter, an adherend part for sticking the adhesive tape end fixed to the arm as the tape holding part, and a tape adhesive surface fixed to the arm close to the outside in the radial direction of the adherend part And a holding roller that rotates while sticking, and when the object and the tape holding part are separated, the adherend part presses the tape adhesive surface stretched between the object and the holding roller to fixedly hold the tape. When the object and the tape holding part are close to each other, the arm rotates so that the tape adhesive surface stretched between the object and the holding roller and the adherend part move in a direction away from each other, and the tape comes off from the adherend part.

Description

Technical Field

[0001] The present invention relates to a tape winding machine for winding an adhesive tape around an object such as a wire bundle in a manufacturing process of a wire harness or the like.

Background Art

[0002] As part of the manufacture of wire harnesses, there is an operation of winding an adhesive tape around a wire bundle or an exterior member covering the same. Conventionally, these operations have been performed manually, but recently, mechanical devices for automating each process have been proposed.

[0003] For example, the tape winding device of Patent Document 1 includes a tape supply mechanism that cuts the tape to a certain length, and a rotating body that rotates in a plane orthogonal to the object, and is provided from the outer peripheral edge of the rotating body toward a central region including the rotation center axis. The pressing plates fixed to the opposing surfaces on both sides inside the U-shaped notch rotate around the object spanned on the rotation center axis, and wind the supplied tape around the object such as an electric wire.

[0004] In the tape winding machine described in Patent Document 2, a radial movement means is provided for moving the roll tape in a direction approaching the object while swirling the roll tape by a rotating plate that rotates in a plane orthogonal to the object. A tape winding machine has been proposed that can suppress the displacement of the object from the rotation center axis by winding the tape pulled out earlier from the roll tape around the object while moving the roll tape in a direction approaching the object without pulling out the tape from the roll tape.

[0005] The tape winding machine includes, as a swirling means for winding the tape around the object, a fixed body disposed in a plane orthogonal to the object and an adjacent rotating body, and the rotating body is rotationally driven in a plane orthogonal to the object.

[0006] In order to insert and remove an object on the rotation center axis of the tape winding machine, the fixed body and the rotating body are provided with U-shaped notches extending from the outer peripheral edge toward the central region including the central axis. In these tape winding machines, the object is inserted and removed with the notches of the fixed body and the rotating body aligned.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0008] In a conventional tape winding device as shown in Patent Document 1, a mechanism and control for cutting the tape into a certain dimension and supplying it toward the outer periphery of the rotating body are required, resulting in a complicated device configuration and a high-cost device. Therefore, in many tape winding work processes, the device is not introduced and is performed manually by workers, causing problems such as worker fatigue and a shortage of workers.

[0009] In addition, in the tape winding device shown in Patent Document 1, since the adhesive tape cut and supplied is not held perpendicular to the object, the tape end tends to protrude in the tape width direction, resulting in a poor appearance.

[0010] In addition, in the tape winding device shown in Patent Document 1, since the adhesive tape cut and supplied is not held under an appropriate tension, the tape may be wound in a loose state, causing wrinkles in the wound tape and making proper winding impossible in some cases.

[0011] Since the tape winding machine shown in Patent Document 2 is a mechanism that holds and rotates a roll tape in a state where the tape is pulled out from the roll tape first and winds the tape around an object, there is a problem that in addition to the tape length spanned from the object to the roll tape, the roll tape also needs to be rotated, which makes the device large.

[0012] Further, in the tape winding machine shown in Patent Document 2, when the tape pulled out from the roll tape first is wound around the object and the outer periphery of the roll tape is in sliding contact with the object, a tension is applied to the tape by the peeling adhesion force of the roll tape (the adhesion force of the tape to the non-adhesive surface on the back side of the tape itself), and when the roll tape rotates under the applied tension, there is a problem that the object is twisted.

[0013] Further, in the tape winding machines shown in Patent Document 2 and Patent Document 3, after cutting the tape between the object and the roll tape after tape winding and taking out the object, it is necessary to press and attach the cut tape end protruding from the object to the object, which takes time for the operation.

[0014] The present invention has been made in view of the above circumstances, and an object thereof is to provide a tape winding machine having a small and simple mechanism and excellent tape winding performance.

Means for Solving the Problems

[0015] A tape winding machine that winds a tape around an object by rotating a tape holding part that holds the adhesive tape relative to the object with the object central axis as the rotation axis, comprising a rotatable arm provided so as to be movable in the radial direction of the rotation diameter, an adherend part for attaching the adhesive tape end fixed to the arm as the tape holding part, and a holding roller fixed to the arm and rotating while the tape adhesion surface is attached, close to the outside in the radial direction of the adherend part. When the object and the tape holding part are separated, the adherend part presses the tape adhesion surface stretched between the object and the holding roller to fixedly hold the tape. When the object and the tape holding part are close, the arm rotates so that the tape adhesion surface stretched between the object and the holding roller and the adherend part move in a direction away from each other, and a mechanism for detaching the tape from the adherend part is provided.

[0016] It is provided with a pressing part that is connected to the tape holding part and presses the outer peripheral surface of the tape wound around the object during tape winding to attach the adhesive tape to the object.

Advantages of the Invention

[0017] According to the present invention, it is possible to provide a tape winding machine with excellent tape winding performance that can perform suitable tape winding with a simple device configuration.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0019] As shown in Fig. 1, a tape holding portion (the adherend portion 2 and the holding roller 3) is provided at the tip of the arm 4 connected by the rotation shaft 5 fixed to the rotation plate 8, and holds the tape 1 (adhesive tape).

[0020] The arm 4 is connected to the rotation plate 8 and is provided so as to be rotatable, and includes an adherend portion 2 that holds the tape at its tip and a holding roller 3. The adherend portion 2 and the holding roller 3 are provided so that the adhesive surface of the tape 1 adheres, and the holding roller 3 is provided on the outer side in the rotation radial direction close to the adherend portion 2.

[0021] The rotation shaft 5 has a holding force that is sufficient to prevent it from rotating due to the self-weight of the arm 4 holding the tape 1, and when the tape stretched between the arm tip and the object 10 is wound onto the object 10 and tension is applied between the tape 1 and the object 10, the object 10 is not swung around by being pulled toward the arm tip side, and the arm 4 can easily rotate and the holding force is within a range where the arm tip moves toward the object 10 side.

[0022] Also, the holding force of the rotation shaft 5 is such that when the tape 1 comes off the adherend portion 2 at a position where the arm 4 is close to the object and the tape is stretched between the object 10 and the holding roller 3 and tension due to the tape 1 being wound onto the object 10 is applied to the tape 1, it is the holding force by adhesion of the tape 1 to the holding roller 3, and it is a holding force that allows the arm 4 to move to a position where rotation in the inward direction of the radial direction of rotation is restricted.

[0023] The rotation range of the arm 4 is restricted in the inward direction of the radial direction of rotation within a range where the arm 4 does not press the object 10 so as to displace it from the rotation center axis. In the outward direction of the radial direction of rotation, it is restricted within a range where the center of the holding roller 3 does not exceed the extension line of the line connecting the rotation center axis and the center of the rotation shaft 5.

[0024] The adherend portion 2 is arranged at the tip of the arm 4 and is provided at a position in contact with the adhesive surface of the tape 1 when the tip of the arm 4 moves in the direction of the object. When the tape holding portion at the tip of the arm 4 moves in the direction of the object and moves to a position close to the object 10, the adhesive surface of the tape 1 stretched between the object 10 and the holding roller 3 is provided so as to separate from the adherend portion 2. The adherend surface of the adherend portion 2 is formed smoothly so that the adhesive surface of the tape 1 adheres to the adherend portion 2 properly without wrinkles.

[0025] The holding roller 3 is disposed on the outer side in the radial direction of rotation of the adhered portion 2, in proximity to the adhered portion 2 at the tip of the arm 4 connected to the rotating plate 8. The holding roller 3 is provided so as to rotate easily about a central axis parallel to the rotation central axis, and its circumferential surface is formed smoothly so that a tape can be attached thereto. The width of the holding roller 3 is larger than the tape width, so that the tape adhesion surface can be attached without wrinkles.

[0026] Also, when the tape is wound around the holding roller 3 with the adhesion surface of the tape 1 attached to the holding roller 3 in a state where the adhesion surface of the tape 1 is attached to the adhered portion 2 at the tip of the arm 4, as shown in FIGS. 5(b) and 6(b), until the tip of the arm 4 approaches the object 10, the adhered portion 2 is provided so as to be pressed against the adhesion surface of the tape stretched from the object 10 to the holding roller 3.

[0027] As shown in FIGS. 7(a) and 7(b), the adhered portion 2 and the holding roller 3 are provided at the tip of the arm 4 so that the adhesion surface angle 14 becomes 180 degrees or less until the arm 4 rotates in the rotation direction 12 while winding the tape and the tip of the arm 4 approaches the object 10.

[0028] Also, as shown in FIG. 8, the adhered portion 2 and the holding roller 3 are provided at the tip of the arm 4 so that the adhesion surface angle 14 becomes larger than 180 degrees when the arm 4 rotates in the rotation direction 12 and the tip of the arm 4 approaches the object 10.

[0029] The pressing portion 7 is provided on the rotating plate 8 and is connected with a resin sheet piece 6. The resin sheet piece 6 is a flexible sheet, and is provided so as to gently press the outer peripheral surface of the tape wound around the object 10 during the winding operation when the tape is wound around the object 10 on the rotation central axis.

Example

[0030] While referring to FIGS. 1 to 4, the operation of the tape winding machine will be described. FIG. 5 is a schematic view showing the rotating plate 8 that performs the tape winding operation and the arm 4. FIG. 6 is a schematic view showing the arm 4 that performs the tape winding operation and the pressing portion 7.

[0031] First, the object 10 (such as a wire bundle) is held by the operator's hand or a device, and in a state where the notches of the fixed plate 9 and the rotating plate 8 are aligned, the object 10 is bridged over the rotation center axis of the rotating plate 8 through the notch and supported by a support portion (not shown).

[0032] As shown in FIGS. 1, 5(a), and 6(a), with the arm 4 rotated outward, the adhesive surface of one end of the tape 1 cut by a tape dispenser or manually is attached to the object 10 (the tape end attached to the object 10 side is defined as the tape leading end), and the adhesive surface of the other end is placed so as to be attached to both the adherend portion 2 and the holding roller 3 (the tape end on the adherend portion 2 side is defined as the tape trailing end). At this time, no tension is applied to the tape 1, but it is stretched so that no slack occurs in the tape. If slack occurs, the arm is rotated outward in the radial direction of the rotation diameter within a regulated range to stretch the tape 1 without slack.

[0033] Since the number of times the tape is wound around the object 10 is determined by the length of the tape 1, the length of the tape to be cut is set according to conditions. For example, when the object 10 is thin or the number of winding times is small, it is made short, and when the object 10 is thick or the number of winding times is large, it is made long.

[0034] As shown in FIGS. 2, 5(b), and 6(b), when the driving force from the driving device causes the rotating plate 8 to start rotating in the rotation direction 11, the tape stretched from the adhered portion 2 holding the tape 1 to the object 10 is wound around the object 10, and tension is applied to the tape 1 stretched between the adhered portion 2 and the object 10. At this time, since the holding force of the rotating shaft 5 connecting the rotating plate 8 and the arm 4 is smaller than the force with which the object tries to stay on the rotation center axis, the object 10 is pulled toward the arm tip side and is not swung around, and the arm 4 rotates in the rotation direction 12 (inward in the radial direction of rotation) about the rotating shaft 5 and moves in the direction of the object 10.

[0035] When the arm 4 rotates, the tension applied to the tape 1 stretched between the adhered portion 2 and the object 10 is suppressed, and the displacement of the object 10 from the rotation center axis of the rotating plate is suppressed. Also, at this time, since only the tension required to move the arm 4 in the rotation direction 12 is applied to the stretched tape, slack does not occur in the tape, thereby suppressing the generation of wrinkles.

[0036] As shown in FIGS. 3, 5(c), and 6(c), when the rotating plate 8 rotates in the rotation direction 11, the arm 4 rotates in the rotation direction 12 and moves to a position close to the object 10. At this time, due to the rotation of the arm 4, the adhered portion 2 moves in a direction away from the adhesive surface of the tape 1 stretched between the object 10 and the holding roller 3, and the tape 1 peels off from the adhered portion 2.

[0037] When the tape 1 comes off from the adhered portion 2, the arm 4 rotates to a position where the inward rotation in the radial direction of rotation is restricted by the tension generated between the holding roller 3 and the object 10 as the tape is wound around the object 10. At this time, the tape 1 moves toward the object 10 while sticking to the holding roller 3, and continues to move toward the object 10 while sticking to the holding roller 3 even after the rotation of the arm 4 stops.

[0038] As shown in FIGS. 4, 5(d), and 6(d), as the rotating plate 8 further rotates in the direction of the rotation direction 11, the tape 1 is wound around the object 10, and the tape 1 that has moved onto the holding roller 3 peels off and detaches from the holding roller 3. Even after the tape 1 has detached from the holding roller 3, the rotating plate 8 continues to rotate, and the resin sheet piece 6 provided on the pressing portion 7 presses and attaches the rear end portion of the tape 1 toward the object 10 side.

[0039] After the end portion of the tape 1 is attached to the object 10, the rotating plate 8 stops at a position where the notches are aligned with the fixed plate 9. After the rotation of the rotating plate 8 stops, the object 10 around which the tape is wound is removed through the notches of the rotating plate 8 and the fixed plate 9 by the operator's hand or a device. At this time, the arm 4 can be easily rotated within a regulated range.

[0040] As described above, at the start of tape winding, the arm 4 moves toward the object 10 side, and the tape 1 is attached to the adherend portion 2 provided at the tip of the arm and fixedly held. At the end of winding, the adhesive surface of the tape 1 peels off from the adherend portion 2, and the tape 1 moves in the direction of the object 10 while being attached to the holding roller 3. After the tape 1 has detached from the holding roller 3, the resin sheet piece 6 presses and attaches the end portion of the tape 1 toward the object 10 side.

[0041] When the rear end of the tape 1 at the start of tape winding is separated from the object 10, the tape 1 is fixedly held at the tip of the arm and the tape is passed with a certain tension, so that the occurrence of deviation or wrinkles in the width direction of the winding tape is suppressed. Also, when the rear end of the tape at the end of winding approaches the object 10, the movement of the tape while adhering to the holding roller 3 suppresses the occurrence of deviation or wrinkles in the width direction of the winding tape.

[0042] In all stages of the above-described tape winding operation, since no tension is applied to object 10 such that it is drawn toward the tip side of arm 4, displacement of object 10 from the rotation center axis of the rotating plate is suppressed, and generation of wrinkles in the tape is suppressed. Also, since the tape does not rotate while strong tension is applied to object 10, even if object 10 is a flexible tube or a thin wire bundle, crushing or twisting does not occur.

[0043] Figs. 7(a) and 7(b) are shown, and the operation when the rear end portion of tape 1 is held by adherend portion 2 and holding roller 3 will be described. In the state before rotating plate 8 starts to rotate, as shown in Fig. 7(a), the adhesive surface of tape 1 is attached to adherend portion 2 and holding roller 3, but no tension is applied to the tape, and the tape 1 radially outside the rotation diameter of holding roller 3 is in a hanging state. When rotating plate 8 rotates and tension is applied to the tape, as shown in Fig. 7(b), roller adhesion portion 13 is pulled toward object 10 side and rotates slightly in the direction of holding roller rotation direction 15. At this time, the rear end of the tape that was hanging outside holding roller 3 moves slightly toward holding roller 3.

[0044] After that, when further tension is applied to tape 1 as it is wound around object 10, tape 1 is pulled toward object 10 side and rotates in the direction of holding roller rotation direction 15, and the object 10 side of the tape attached to holding roller 3 peels off from holding roller 3. However, at the same time, on the rear end side of tape 1 attached to holding roller 3, the tape drawn by the rotation of holding roller 3 adheres to holding roller 3. As a result, tape 1 does not completely peel off from holding roller 3, and the tape adhesive surface remains attached to holding roller 3 while the tape moves.

[0045] At this time, the tape peels off against the adhesive force to the holding roller 3 on the adhesive surface of the tape, tension is generated in the tape between the holding roller 3 and the object 10, and the adherend 2 is pressed against the adhesive surface of the tape. As a result, while the adhesive surface of the tape is pressed against the adherend 2, the tape is held at an angle (the adhesive surface angle 14 is 180 degrees or less) without being peeled off by the holding roller 3, so the tape is fixedly held without peeling off from the adherend 2. With the tape 1 fixedly held on the adherend 2 at the tip of the arm 4, as the tape 1 is wound around the object 10, the arm 4 rotates in the direction of the rotation direction 12.

[0046] When the angle (adhesive surface angle 14) between the tape stretched from the object 10 to the adherend 2 and the tape stretched from the adherend 2 to the holding roller 3 is less than 180 degrees, the adherend 2 is pressed against the adhesive surface of the tape 1, so the tape 1 is fixedly held on the adherend 2. As this adhesive surface angle 14 approaches 180 degrees, the holding force weakens, and when it exceeds 180 degrees, the tape 1 peels off from the adherend 2.

[0047] Furthermore, at the position where the arm 4 further rotates and the tip of the arm approaches the object 10 and the rotation stops, the adhesive surface of the tape 1 detaches from the adherend 2, and the tape 1 detached from the adherend 2 moves in the direction of the holding roller rotation direction 15 while sticking to the holding roller 3 and is wound around the object 10.

[0048] In this mechanism, when the adhesive surface angle 14 is less than 180 degrees, the adhesive surface of the tape is fixedly held on the adherend 2. When the adhesive force of the tape 1 to the adherend 2 is insufficient, it is possible to arrange the adhesive surface angle 14 to be smaller, or to increase the adherend 2 to increase the adhesion area and strengthen the holding force.

[0049] Note that the present invention is not limited to the above-described embodiments, and various modifications can be adopted within the scope of the present invention. In addition, the materials, shapes, dimensions, arrangement locations, etc. of the respective components in the above-described embodiments are arbitrary as long as the present invention can be achieved, and are not limited. For example, the shapes of the arm and the rotating plate.

[0050] Moreover, the present invention is not limited to the form in which the arm rotates around the object. For example, in the state of FIG. 6, the object rotates, and the arm may rotate by winding the tape. That is, with the central axis of the object as the rotation axis, the tape holding portion and the pressing portion may be relatively rotated with respect to the object.

[0051] Moreover, the present invention is not limited to the mechanism in which the tape holding portion moves toward the object side when the arm rotates, and a mechanism that moves linearly in the direction of the object and then rotates may also be used. For example, as shown in FIG. 12, after the tape holding portion moves to a position close to the object by a linear motion slide, the tape holding portion rotates in a direction away from the adhesive surface from the position where the adhered portion presses the tape adhesive surface by a cam (not shown in detail), so that the tape adhesive surface detaches from the adhered portion. At this time, the linear motion slide is held with the same holding force as the rotation shaft 5 described above.

[0052] The tape to be wound is not limited to the method of using a tape cut by a tape dispenser or the like. As shown in Patent Document 3, the tape end may be attached to the object by a tape drawing machine and then the tape may be cut and wound.

[0053] In the present invention, not only can the tape be wound by overlapping it at the same position, but as shown in FIG. 10, the tape can be wound around the object in a spiral shape by attaching the tape obliquely before winding. At this time, the holding roller may adjust the angle as needed.

[0054] In the present invention, as shown in FIG. 11, by providing the pressing portion rotatably on the rotating plate, the resin sheet piece can be retracted to a position that does not interfere with the work, for example, when attaching the tip of the tape to the object, except during the tape winding operation.

[0055] The object to which the tape is wound is not limited to a wire bundle. In the present invention, any linear material around which the tape can be wound can be used. For example, it may be a single wire, a linear member without wires, or a tubular material.

Explanation of Signs

[0056] 1 Tape 2 Adherend 3 Holding roller 4 Arm 5 Rotation axis 6 Resin sheet piece 7 Pressing part 8 Rotating plate 9 Fixed plate 10 Object 11 Rotation direction 12 Rotation direction 13 Roller adhesion part 14 Adhesive surface angle 15 Holding roller rotation direction

Claims

1. A tape winding machine that winds tape around an object by rotating a tape holding unit that holds an adhesive tape relative to the object around the central axis of the object as a rotation axis, A rotatable arm that is provided with a tape holding portion so as to be movable in a radial direction of rotation; an adhesive portion fixed to the arm as the tape holding portion, to which an end of the adhesive tape is attached; a holding roller fixed to an arm in close proximity to the outer side of the adhesive portion in the rotational radial direction, the holding roller rotating while the adhesive surface of the tape is attached thereto; When the object is separated from the tape holding portion, the adhesive surface of the tape stretched between the object and the holding roller is pressed by the adhesive portion to hold the tape in a fixed state; When the target object and the tape holding part are close to each other, the arm rotates to move the adhesive surface of the tape stretched between the target object and the holding roller away from the adhesive part, and the tape is removed from the adhesive part.

2. 2. The tape winding machine according to claim 1, further comprising a pressing part connected to the tape holding part for pressing the outer peripheral surface of the tape wound around the object when the tape is wound, thereby attaching the adhesive tape to the object.

Images