Tape dispenser

Abstract

A tape take-out device has a tape holding portion that holds a tape end extended from a tape roll, and takes out the tape from the tape roll by expanding a gap between the tape roll and the tape holding portion, wherein the tape holding portion has an adhered portion for allowing an adhesive surface of the tape end to adhere, and a holding roller for rotating while allowing the adhesive surface of the tape end to adhere at a position on a lower side of the adhered portion. The tape take-out device is a simple mechanism with excellent tape take-out performance.

Description

Technical Field

[0001] This invention relates to a tape ejector for drawing tape from a roll of tape. Background Technology

[0002] Previously, as part of the manufacturing of vehicle wiring harnesses, a tape take-out machine for a tape winding machine was proposed, which is used to wind tape onto the wiring harness or cover the outer components of the wiring harness.

[0003] For example, Patent Document 1 describes a tape unwinding machine, which includes: a holding portion for holding the tape end extending from a roll of tape; and a chuck portion for holding the tape end held by the holding portion; and tape is unwinding from the roll of tape by widening the gap between the chuck portion holding the tape end and the holding portion.

[0004] The tape ejector retains the end of the tape extending from the roll and ejects the tape. Furthermore, "tape ejection" refers to: retaining the tape that has been fed out first and pulling the adhesive tape wound on the roll to deliver it.

[0005] Generally, tapes used for this purpose are single-sided adhesive tapes with adhesive on one side. The side of the single-sided adhesive tape opposite to the adhesive side is the non-adhesive side. The non-adhesive side of the lower tape abuts against the adhesive side of the upper tape, so that the adhesive tape can be easily fed out from the part that was first fed out. Existing technical documents Patent documents Patent Document 1: Japanese Patent Application Publication No. 2019-26439 Patent Document 2: Japanese Patent Application Publication No. 2021-62948 Invention Summary The problem that the invention aims to solve

[0007] Conventional tape winding machines feature a tape ejector mechanism where a chuck holds and pulls out the cut tape tip. Therefore, to ensure the chuck accurately holds the tape tip after cutting, a retaining portion is needed near the outer circumference of the tape roll, allowing the slightly extended tape tip to stand upright. However, as the tape is used and the outer diameter of the roll decreases, the gap between the roll and the retaining portion widens, causing the tape to bend under its own weight, potentially resulting in the tape tip not being held in the correct position.

[0008] Conventional tape winding machines, in addition to the holding unit, require a chuck unit to properly hold and pull out the tape. This chuck unit performs the following actions: clamping and moving the tape end, and releasing the tape end. The mechanism and control are relatively complex. Therefore, conventional tape pullers are only used in large and expensive tape winding devices. Even today, tape pulling in tape winding operations using tape winding machines is mostly done manually. For example, in tape winding operations using the simple and inexpensive tape winding machine described in Patent Document 2, pulling the tape from the roll is done manually by the operator, leading to problems such as operator fatigue and insufficient manpower.

[0009] The present invention was made in view of the above circumstances, and its object is to provide a tape unloading machine with excellent performance that achieves tape unloading from a roll of tape with a simple mechanism. Methods for solving problems

[0010] The tape ejector of the present invention includes a tape holding portion that holds the tape end extending from a roll of tape, and draws the tape out of the roll of tape by widening the gap between the roll of tape and the tape holding portion. The tape holding portion includes: a bonding portion for bonding the adhesive surface of the tape end; and a holding roller that rotates while bonding the adhesive surface of the tape end at a position closer to the front end of the tape than the bonding portion.

[0011] The tape ejector also includes: a sliding plate for moving the tape end held by the tape holding part to the object position; and a moving plate for moving the sliding plate in a direction that widens the gap between the sliding plate and the tape being ejected. Invention Effects

[0012] According to the present invention, a tape puller with excellent tape pull-out performance can be provided, which can hold and pull out the tape end fed from the roll of tape with a simple mechanism. Brief description of the attached figures Figure 1 This is a perspective view of a tape winding machine equipped with the tape lead-out machine of the present invention. Figure 2 (a) is a schematic diagram showing the state before the tape is pulled out. Figure 2 (b) is a schematic diagram showing the action of drawing out the tape. Figure 2 (c) is a schematic diagram showing the action of retracting while sticking the end of the tape to the object. Figure 3 (a) is a schematic diagram showing the action before the tape is cut. Figure 3 (b) is a schematic diagram showing the state before the tape is cut. Figure 3(c) is a schematic diagram showing the action of cutting the tape. Figure 4 This is a perspective view showing the tape delivery machine of the present invention. Figure 5 (a) is a schematic diagram of the tape holding section before the tape is drawn out, viewed from the direction of the central axis of the roll tape. Figure 5 (b) is a schematic diagram of the tape holding part when the tape is drawn out, viewed from the direction of the central axis of the roll tape. Figure 6 This is a schematic diagram of the tape ejector of the present invention viewed from the non-adhesive side in the thickness direction of the ejected tape. Detailed Implementation

[0014] The tape lead-out machine and tape winding machine according to embodiments of the present invention will be described with reference to the accompanying drawings. For ease of explanation, as follows... Figure 1 , Figure 4 The definitions shown are "front," "back," "left," "right," "up," and "down." The front-back, left-right, and up-down directions are mutually orthogonal.

[0015] like Figure 1 As shown, the tape winding machine, as a rotary mechanism for moving a roll of tape 2 in a plane orthogonal to the object 1, includes: a rotating plate 5 disposed in the plane orthogonal to the object 1, with a hollow central region; and a fixed plate 6 disposed adjacent to the rotating plate 5, also with a hollow central region. The rotating plate 5 is driven to rotate by a motor. The rotating plate 5 and the fixed plate 6 are provided with slits for inserting or removing the object 1 from its outer periphery towards the hollow portion of the central region. When the slits of the rotating plate 5 and the fixed plate 6 are aligned, the object 1 can be easily inserted or removed through the slits. A retaining portion 3 is provided at the front end of the roll tape support 4 fixed to the rotating plate 5 to hold the roll tape 2.

[0016] like Figure 4 As shown, the tape ejector includes a sliding plate 13 that moves the tape holding section 7 in the front-to-back direction (sliding plate moving direction 16). The sliding plate 13 can be selectively controlled to either a forward operating position (the position where the tape is attached to the object 1) or a rearward operating position (the position where the tape is cut and the tape end is held). Furthermore, the tape ejector includes a moving plate 14 that moves in the up-down direction (moving plate moving direction 18). The moving plate 14 can be selectively controlled to either an upward operating position (the position where the tape ejection operation is performed) or a downward operating position (retreating position).

[0017] The tape holding part 7 is connected to the sliding plate 13, and has a bonding part 8 and a holding roller 9 at its upper front end. The bonding part 8 and the holding roller 9 are arranged in such a way that the bonding surface of the tape drawn from the roll tape 2 can be bonded. The holding roller 9 is arranged adjacent to the bonding part 8 on the tape end side of the bonding part 8.

[0018] The adhesive portion 8 is disposed at the upper front end of the tape holding portion 7 provided on the sliding plate 13. The adhesive portion 8 is positioned such that it contacts the adhesive surface of the tape drawn from the roll tape 2 when the moving plate 14 moves upward. In order to properly adhere the tape adhesive surface to the adhesive portion 8 without wrinkles, the adhesive surface of the adhesive portion 8 is formed smoothly.

[0019] The retaining roller 9 is adjacent to the bonded portion 8 on the tape holding portion 7 provided on the sliding plate 13, and is positioned further towards the tape end than the bonded portion 8. The retaining roller 9 is arranged such that it can easily rotate about a central axis parallel to the central axis of the roll tape 2, and its circumferential surface is smoothly formed to allow the tape to adhere to the roller. The width of the retaining roller 9 is greater than the width of the tape, allowing the tape bonding surface to be adhered without wrinkles. Furthermore, the retaining roller 9 is positioned slightly below the bonded portion 8, so that when the tape is drawn out with the bonding surface adhered to the bonded portion 8 and the retaining roller 9 of the tape holding portion 7, as... Figure 5 As shown in (b), the adhesive portion 8 presses the adhesive surface of the tape that is stretched from the roll tape 2 to the holding roller 9.

[0020] The sliding plate 13 is driven by a cylinder (not shown) or other means, and is configured to move in the back-and-forth direction (the direction of tape lead-out). The sliding plate 13 is positioned below (on the adhesive side) the tape fed from the roll tape 2. When the tape is led out, the sliding plate 13 moves forward to a predetermined position such that the tape end held by the tape holding part 7 fixed to the sliding plate 13 can be adhered to the object. Furthermore, after the tape end is adhered to the object 1, the sliding plate 14 moves downward, and then moves backward (in the direction of the roll tape 2) using a driving force to the position before the tape lead-out operation. The sliding plate 13 is connected to the sliding plate 14 and moves back and forth on the vertically moving sliding plate 14.

[0021] The movable plate 14 is driven by a cylinder (not shown) or other means and is configured to move vertically. When the tape end is drawn out, it moves upward (to the position where the adhesive portion 8 of the tape holding portion 7 contacts the adhesive surface of the tape); during the tape winding operation, it moves downward to a position where the tape drawer will not collide with the roll of tape 2 rotating by the tape winding machine (a position that will not obstruct the operation of the tape winding machine).

[0022] The pressing part 10 is rotatably disposed at the front end (on the object 1 side) of the movable plate 14, and has a resin sheet 12 at its front end. When the sliding plate 13 moves, leading the tape to a position where the tape end can be adhered to the object 1, the pressing part 10 is pressed and rotated by the sliding plate 13, so that the tape end is positioned between the resin sheet 12 of the pressing part 10 and the object 1. When the pressing part 10 is not pressed by the sliding plate 13, the elastic body 11 fixed to the movable plate 14 applies force, and when the movable plate 14 moves up and down, the pressing part 10 rotates and retracts to a position where the pressing part 10 and the resin sheet 12 will not come into contact with the object 1.

[0023] Reference Figure 5 (a) Figure 5 (b) The method for holding the tape in the tape holding part 7 will be explained. In the state before the tape is drawn out (after the tape is cut), as follows: Figure 5 As shown in (a), the adhesive surface of the tape is bonded to the bonded portion 8 and the retaining roller 9, but no tension is applied to the tape, and the front end of the tape in front of the retaining roller 9 is in a downward hanging state. When the sliding plate 13 moves and applies tension to the tape, as... Figure 5 As shown in (b), the roller bonding section 21 is pulled toward the roll tape 2 and rotates in the rotation direction 19 of the holding roller. At this time, the tape end hanging in front of the tape holding section 7 moves upward. During this stage, the tape holding section 7 does not have the force to hold the tape and will not draw the tape out from the roll tape 2.

[0024] Subsequently, as the gap between the roll tape 2 and the tape holding portion 7 further widens and tension is applied to the tape, the tape is pulled towards the roll tape 2 side and rotates further along the rotation direction 19 of the holding roller, causing the roll tape 2 side of the tape adhered to the holding roller 9 to peel off from the holding roller 9. However, simultaneously, at the leading edge side of the tape adhered to the holding roller 9, tape drawn from the leading edge side of the tape adhered to the holding roller 9 is adhered to the holding roller 9 by the rotation of the holding roller 9. As a result, the tape does not completely peel off from the holding roller 9, resulting in a state where the tape moves while the adhesive surface of the tape remains adhered to the holding roller 9. At this time, the tape peels off against the adhesive force of the adhesive surface of the tape against the holding roller 9, generating tension on the tape between the bonded portion 8 and the holding roller 9. When the tape is under tension, the bonding portion 8 is pressed against the bonding surface of the tape, and the tape moves together with the holding roller 9 in the direction of tape lead-out. The bonding surface of the tape is pressed against the bonding portion 8, and the tape is held at the holding roller 9 without being peeled off, maintaining the angle (bonding surface angle 20). Therefore, the adhesive force of the tape on the bonding portion 8 is increased, and the tape can be led out from the roll tape 2 by resisting the adhesive force of the bonding surface of the roll tape on its back non-bonding surface.

[0025] If the angle (adhesive surface angle 20) between the tape stretched from the roll tape 2 to the bonding portion 8 and the tape stretched from the bonding portion 8 to the holding roller 9 is reduced, the holding force of the tape is increased. This is because the bonding portion 8 presses the adhesive surface of the tape more forcefully. In this mechanism, when the tape is drawn out, until tension is generated on the tape and the tape is held at the bonding portion 8, the tape on the tape holding portion 7 moves slightly towards the roll tape 2 side, thus shortening the tape length from the tape tip extending from the tape holding portion 7, but it is then held securely. If the tape tip located in front of the tape holding portion 7 continues to move towards the tape holding portion 7 side, it indicates that the tape holding portion 7 is not holding the tape end force sufficiently. In this case, it is necessary to further reduce the adhesive surface angle 20 as described above, or to increase the bonding portion 8 to increase the bonding area, thereby enhancing the holding force.

[0026] The tape holding mechanism described above obtains a holding force sufficient to draw the tape from the roll tape 2 when the adhesive surface of the tape being fed is adhered to both the bonding portion 8 and the holding roller 9. If an attempt is made to draw the tape with only the adhesive surface of the tape being fed from the roll tape 2 adhered to the bonding portion 8, the tape will easily peel off from the bonding portion 8 due to the tension of the tape and will not be held. Furthermore, if an attempt is made to draw the tape with only the holding roller 9 adhered to the tape being fed from the roll tape 2, the holding roller 9 will continue to rotate in the holding roller rotation direction 19, and the tape will move without being held while the adhesive surface is adhered to the holding roller 9. By adhering the tape to both the bonding portion 8 and the holding roller 9 and applying tension to the tape, a pressing force is generated to prevent the adhesive surface of the tape from peeling off from the bonding portion 8, and the tape holding portion 7 can obtain a holding force sufficient to draw the tape from the roll tape 2. When the tape drawing operation stops and no tension is applied to the tape, the tape can be easily peeled off from the bonding section 8 and the holding roller 9. During the tape drawing machine's retraction while attaching the tape end to the object 1, the adhesive surface of the tape end is pressed firmly against the object 1, resulting in a peeling state at the bonding section 8 and the holding roller 9. The adhesive surface of the tape is easily peeled off from the bonding section 8 and the holding roller 9, resulting in the tape being stretched from the roll tape 2 onto the object 1. Example

[0027] First, such as Figure 1 , Figure 2 As shown in (a), the object 1 (wire harness, etc.) is held by the operator's hand or a device and placed on the central axis of the rotating plate 5. At this time, the rotating plate 5 is as follows: Figure 1As shown, the rotation plate 5 stops at a position where the cut on the rotating plate 5 aligns with the cut on the fixed plate 6. When the cut on the rotating plate 5 is aligned with the cut on the fixed plate 6, the object 1 is inserted or removed from the outer periphery of the fixed plate 6 toward the rotation center axis of the rotating plate 5. At this time, the resin sheet 12 of the pressing part 10, which is subjected to force by the elastic body 11 fixed to the moving plate 14, retracts to a position that does not obstruct the insertion or removal of the object.

[0028] When object 1 is inserted or removed from the rotating central axis of the rotating plate, the tape end led out from the roll tape 2 is held in a state where the adhesive surface is attached to both the holding roller 9 and the adhesive portion 8 of the tape holding portion. The cut tape tip is located further forward than the tape holding portion 7 (in the direction of object 1), but the tape tip is in a position that does not obstruct the insertion or removal of object 1.

[0029] Next, as Figure 2 As shown in (b), the adhesive surface of the tape fed from the roll tape 2 is adhered to the holding roller 9 and the adhesive portion 8 located at the front end of the tape holding portion 7, thereby holding the tape. The sliding plate 13 moves in the direction of guiding the tape toward the object 1, thereby drawing the tape out from the roll tape 2. The tape tip is held in such a state that only the adhesive surface of the tape tip is adhered to the object 1 to the required size as the tape holding portion 7 extends toward the object 1. When the sliding plate 13 moves, the tape tip is held above the object 1 with the adhesive surface facing the object 1. At this time, the pressing portion 10 is pressed and rotated by the front end of the sliding plate 13, so that the tape tip is positioned between the resin sheet 12 provided at the front end of the pressing portion 10 and the object 1.

[0030] The tape holding part 7, which holds the tape end when the tape is drawn from the roll tape 2, will be explained. Figure 5 (b) This indicates the tape holding section 7 when the tape is drawn from the roll tape 2. The adhesive surface of the tape end fed from the roll tape 2 is adhered to the bonding section 8 and the holding roller 9 located at the upper front end of the tape holding section 7. When the sliding plate 13 moves and applies tension to the tape, the holding roller 9 rotates in the holding roller rotation direction 19, pressing the adhesive surface of the tape against the bonding section 8 while tensioning the tape. In other words, the bonding section 8 presses the adhesive surface of the tape stretched between the roll tape 2 and the holding roller 9. Furthermore, at this time, as the holding roller 9 rotates in the holding roller rotation direction 19, the front end of the tape moves slightly towards the roll tape 2, and the tape end moves upward due to the rotation of the holding roller 9. In the state where the tape end is hanging down, it is difficult to adhere the tape end to the object 1, but by rotating the holding roller 9 and moving the tape end upward, it is easy to adhere the adhesive surface of the tape end to the object 1.

[0031] Next, as Figure 2As shown in (c), the moving plate 14 moves downward (in the direction away from the adhesive surface of the tape holding part 7) to adhere the tape end to the object 1. At this time, the resin sheet 12 at the front end of the pressing part 10 presses the tape end to the object 1, thereby adhering the adhesive surface of the tape end to the circumferential surface of the object 1, and the tape peels off from the adhering part 8 and the holding roller 9 as it retracts downward. Afterward, the moving plate 14 moves downward to a position where the tape ejector will not collide with the roll of tape 2 rotating by the tape winding machine, causing the tape ejector to retract. After the downward retraction action is completed, the tape winding machine operates to wind the tape onto the object 1.

[0032] After the tape is wound by the tape winding machine, as Figure 3 As shown in (a), the sliding plate 13 moves to a predetermined rearward position from below (the position where the adhesive surface of the tape is not in contact with the adhesive surface 8 of the tape holding part 7). At this time, the pressure of the sliding plate 13 on the pressing part 10 is released, and the pressing part 10 rotates away from the tape holding part 7 by the elastic body 11. When the moving plate 14 moves upward, the resin sheet 12 is retracted to a position that does not obstruct the insertion and removal of the object 1, and the moving plate 14 moves upward. Figure 3 (b) indicates that the movable plate 14 moves upward to the following specified position: the bonded part 8 of the tape holding part 7 comes into contact with the bonding surface of the stretched tape.

[0033] like Figure 3 As shown in (c), the cutting blade 15 cuts the tape stretched from the roll tape 2 to the object 1 by pressing down on the non-adhesive side of the back of the tape. At this time, the tape end on the side of the cut roll tape 2 adheres to the adhesive part 8 and the holding roller 9 of the tape holding part 7. In this state, the object 1 with the tape wound around it is removed.

[0034] As described above, the adhesive surface of the tape fed from the roll tape 2 is bonded to the adhesive portion 8 and the holding roller 9 provided in the tape holding portion 7, thereby holding the tape. The sliding plate 13 connected to the tape holding portion 7 moves in the direction of guiding the tape toward the object 1. Thus, with such a simple mechanism of drawing the tape from the roll tape 2, a suitable tape drawing can be performed.

[0035] This invention is not limited to the embodiments described above, and various modifications can be adopted within the scope of this invention. Furthermore, the material, shape, size, and arrangement of the constituent elements in the above embodiments are arbitrary and not limited, as long as they enable the implementation of this invention. For example, the size and shape of the bonded portion 8.

[0036] Furthermore, the tape winding machine is not limited to a mechanism in which the roll of tape is rotated by a rotating body; it can also be a type in which the tape is wound around the circumference of the object by rotating the object. In this case, the downward movement of the moving plate 14 is sufficient only to the position where the adhesive surface of the tape from the roll of tape 2 to the object 1 is detached from the tape holding part 7. Explanation of reference numerals in the attached figures

[0037] 1. Object; 2. Rolled tape; 3. Holding part; 4. Rolled tape support part; 5. Rotating plate; 6. Fixing plate; 7. Tape holding part; 8. Bonded part; 9. Holding roller; 10. Pressing part; 11. Elastomer; 12. Resin sheet; 13. Sliding plate; 14. Moving plate; 15. Cutting blade; 16. Sliding plate moving direction; 17. Pressing part rotation direction; 18. Moving plate moving direction; 19. Holding roller rotation direction; 20. Bonding surface angle; 21. Roller bonding part

Claims

1. A tape drawing machine comprising a tape holding portion for holding the tape end extending from a roll of tape, wherein the tape is drawn out from the roll of tape by increasing the gap between the roll of tape and the tape holding portion, wherein, The tape holding part includes: The adhesive portion is used for bonding the adhesive surface of the tape end; and A retaining roller is used to rotate while the adhesive surface of the tape end is being adhered at a position lower than the adhesive portion.

2. The tape delivery machine according to claim 1 further comprises: A sliding plate for moving the tape end held by the tape holder to the object position; and A movable plate for moving the sliding plate in a direction that increases the gap between the sliding plate and the delivered tape.

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