Paint film transfer tool

Abstract

To provide a coating film transfer tool having a simple structure, preventing the generation of sound, and having a reversing prevention mechanism with a very small rewinding amount of a transfer tape.SOLUTION: The coating film transfer toll includes a shaft member with an anti-reverse claw. The anti-reverse claw of the shaft member engages with a ratchet gear of the core (delivery core and / or take-up core). The shaft member is moved by the rotation of a rotating shaft portion while being in contact with the rotating shaft portion that interlocks with the core. When the core is reversed, the shaft member moves and the ratchet gear engages with the anti-reverse claw to prevent the core from being reversed. When the core rotates forward, the shaft member moves and the engagement between the ratchet gear and the anti-reverse claw is released.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the technical field of a coating film transfer tool for pressing and transferring a character correction coating film, an adhesive coating film for adhesion, a decorative coating film, or the like onto a transfer surface of a transfer object. [Background technology]

[0002] In a coating film transfer device, the coating film on the transfer tape that is paid out from the payout core is transferred to the object to be transferred at the tip of the transfer head, and the transfer tape (base tape) with the coating film removed is then wound up onto the take-up core, thereby transferring the coating film.

[0003] After the coating film transfer is completed, the transfer head is lifted from the receiving body, and the coating film transferred to the receiving body and the coating film on the transfer tape are cut off at the tip of the transfer head. If the coating film on the transfer tape cut off at the tip of the transfer head remains at the tip of the transfer head, the coating film will be reliably transferred to the receiving body from the position where the tip of the transfer head is next pressed against the receiving body. Therefore, if the coating film on the transfer tape cut off at the tip of the transfer head remains at the tip of the transfer head, the coating film transfer can be reliably started from the position where the user wants to start the coating film transfer. However, in coating film transfer tools, the interlocking rotation mechanism that rotates the payout core and the take-up core in interlocking rotation can cause the transfer tape to be rewound toward the payout core.

[0004] Such interlocking rotation mechanisms include those in which gears that rotate concentrically with the payout core and take-up core are meshed together, and those in which a belt such as an O-ring is looped between pulleys that rotate concentrically with the payout core and take-up core.

[0005] In an interlocking rotation mechanism in which gears mesh, backlash between the gears causes the transfer tape to be rewound toward the payout core. In an interlocking rotation mechanism in which a belt is looped around, the belt tension on the feeding side of the payout core pulley is smaller than the belt tension on the pulling side of the pulley (payout core pulley) that rotates concentrically with the payout core, resulting in slack in the belt on the feeding side. When the coating film transfer is completed and the transfer head is lifted from the transfer target, the payout core pulley rotates in the reverse direction to eliminate the difference in belt tension between the belt pulling side and the belt pushing side. In this way, the payout core pulley rotates in the reverse direction, causing the transfer tape to be rewound toward the payout core.

[0006] When the transfer tape is rewound onto the payout core, there is no coating on the transfer tape at the tip of the transfer head, so the user cannot start coating transfer from the position where they want to start. For this reason, for example, if the coating is correction tape, the correction tape coating may not be transferred to the location where they want to start correction. Furthermore, the substrate tape surface of the transfer tape on which the coating is laminated is smooth and has a low coefficient of friction to allow the coating to be easily peeled off. Therefore, compared to when the coating is at the tip of the transfer head, when the transfer tape is rewound onto the payout core and there is no coating at the tip of the transfer head, the user must apply a strong force to press the tip of the transfer head against the object to be transferred in order to pull out the transfer tape. Therefore, when the transfer tape is rewound onto the payout core and there is no coating on the transfer tape at the tip of the transfer head, there is also the problem that the coating transfer tool becomes difficult to use.

[0007] To solve these problems, coating film transfer tools have traditionally been equipped with a reverse prevention mechanism on the payout core or the take-up core that is linked to the payout core to prevent the transfer tape from being rewound onto the payout core. A ratchet mechanism, as shown in Figure 3, has typically been used as a reverse prevention mechanism for coating film transfer tools to minimize the amount of transfer tape rewound. Figure 3 shows a coating film transfer tool with a conventional reverse prevention mechanism. Figure 3(a) is a front view of a coating film transfer tool with a conventional reverse prevention mechanism with the upper case removed. Figure 3(b) is a YY cross-sectional view of Figure 3(a). Figure 3(c) shows the lower case and ratchet gear attached to the lower case of a conventional coating film transfer tool, and Figure 3(d) shows the take-up core and the reverse prevention pawl attached to the take-up core of a conventional coating film transfer tool. However, Figure 3(b) shows the state with the upper case attached.

[0008] The ratchet mechanism consists of a directional ratchet gear 5C arranged continuously on the circumference, and a reverse rotation prevention pawl 3C that meshes with each tooth of the ratchet gear 5C. The reverse rotation prevention pawl 3C is attached to the tip of an elastic piece and is pressed against the ratchet gear 5C by the elastic force of the elastic piece. As shown in Figure 3, when the winding core 3, on which the reverse rotation prevention pawl 3C is attached, rotates in the forward direction, which is the direction in which it rotates during normal coating film transfer, the ratchet gear 5C and the reverse rotation prevention pawl 3C are shaped such that the elastic piece attached to the tip of the reverse rotation prevention pawl 3C elastically deforms, allowing the reverse rotation prevention pawl 3C to slide over the slope of the ratchet gear 5C and overcome the ratchet gear 5C. On the other hand, when the winding core 3 rotates in the reverse direction, the ratchet gear 5C and the reverse rotation prevention pawl 3C are shaped so that their contact surfaces press against each other in the opposing direction, preventing the reverse rotation prevention pawl 3C from overriding the ratchet gear 5C.

[0009] In a ratchet mechanism, if the rotating body provided with the ratchet mechanism attempts to rotate in reverse, the ratchet gear and the anti-reverse pawl immediately engage to prevent the reversal. Furthermore, by adjusting the gear spacing of the ratchet gear, the amount of reversal of the ratchet gear can be easily reduced. Therefore, by employing a ratchet mechanism as a reverse prevention mechanism for a coating film transfer tool, the amount of rewinding of the transfer tape can be reduced.

[0010] However, when a ratchet mechanism is used as a reverse prevention mechanism for a coating film transfer tool, there is a problem in that ratchet noise occurs during forward rotation. As described above, when the winding core 3 rotates forward, the reverse prevention pawl rides over each tooth of the ratchet gear, causing the winding core 3 to rotate. At this time, the reverse prevention pawl is pressed against the ratchet gear by the elastic force of the elastic piece, so that each time the reverse prevention pawl rides over the ratchet gear, the reverse prevention pawl is struck against the ratchet gear. For this reason, in a coating film transfer tool that uses a ratchet mechanism as a reverse prevention mechanism, noise, known as ratchet noise, always occurs from the reverse prevention mechanism during coating film transfer.

[0011] Accordingly, coating film transfer tools that address this ratchet noise have been proposed in Patent Document 1 and elsewhere. Patent Document 1 proposes a coating film transfer tool that addresses the issue of reducing ratchet noise, and that includes an annular protrusion on the inner surface of a first frame member arranged on one side of the supply reel, with ratchet teeth formed in a ring shape centered on the rotation axis of the reel, a ratchet pawl holder that rotates with the reel on the reel side of the first frame member and has a ratchet pawl at the tip of an arm that extends circumferentially centered on the rotation axis of the reel and that engages with the ratchet teeth to prevent the reel from rotating in reverse, and a ratchet arm presser that rotates with the reel on the reel side of the ratchet pawl holder, with the ratchet arm presser and the first frame member limiting movement of the arm in the thickness direction of the ratchet pawl holder.

[0012] Patent Document 2 aims to provide a coating film transfer tool with a reverse rotation prevention mechanism that does not require complex gear tooth shapes and allows for easy gear manufacturing. The tool has a roll gear that connects to a rotation system consisting of a supply bobbin drive shaft, a take-up bobbin drive shaft, and a rotary connection mechanism, a movable gear that is arranged to be movable within a predetermined range around the roll gear and meshes with the roll gear, and a locking protrusion that is arranged corresponding to the reverse rotation side of the roll gear and can engage with the movable gear.

[0013] Furthermore, Patent Document 3 proposes a coating film transfer tool that simplifies the shape of the case and supply gear and prevents noise from being generated during use. The upper end of a compression coil spring attached to a support shaft is engaged with a presser button, and the lower end is engaged with a spring receiver. The force of the compression coil spring presses the lower surface of the spring receiver against the upper surface of the cylindrical boss of the supply gear, so that when a force is generated that tends to rotate the supply gear in the reverse direction, the compression coil spring is wound tightly around the support shaft, preventing the supply gear from rotating in the reverse direction.

[0014] Patent Document 4 proposes a coating film transfer tool that aims to prevent noise from being generated by the reverse prevention mechanism when the coating film transfer tool is in use, by forming a through opening between adjacent ratchet teeth in the circumferential direction of the ratchet formed on the inside surface of the case, and when a locking claw formed integrally with the supply reel overcomes the ratchet teeth and returns to its original position, the elasticity of the arm moves it to a position beyond its rest position, but the tip of the locking claw fits into the opening.

[0015] However, the coating film transfer tool of Patent Document 1 requires many additional components, such as a first frame member, a ratchet pawl holder having a ratchet pawl at the end of the arm that rotates with the reel and prevents the reel from rotating backward, and a ratchet arm retainer that rotates with the reel, resulting in a complex structure. The coating film transfer tool of Patent Document 2 has a structure in which the anti-reverse mechanism operates by moving the movable gear within a predetermined range, making it difficult to significantly reduce the amount of rewinding of the transfer tape. The coating film transfer tool of Patent Document 3 also has difficulty significantly reducing the amount of rewinding of the transfer tape because the supply gear rotates backward from the time the supply gear starts to reverse until the compression coil spring is wound tight around the support shaft. Furthermore, in the coating film transfer tool of Patent Document 4, the tip of the locking pawl fits into the opening, preventing contact between the locking pawl and the ratchet teeth, resulting in the locking pawl fitting between the ratchet teeth with a certain amount of play. Therefore, the locking claw can move further from the state where the tip of the locking claw is in the opening, making it difficult to make the amount of rewinding of the transfer tape very small. [Prior art documents] [Patent documents]

[0016] [Patent Document 1] Japanese Patent Publication No. 2020-090043 [Patent Document 2] Japanese Patent Application Publication No. 2019-025827 [Patent Document 3] Japanese Patent Application Laid-Open No. 2005-047201 [Patent Document 4] Japanese Patent Application Laid-Open No. 2005-219277 Summary of the Invention [Problem to be solved by the invention]

[0017] The present invention was made in consideration of the above-mentioned circumstances, and the problem that the present invention aims to solve is to provide a coating film transfer tool with a simple structure, a reverse prevention mechanism that prevents the generation of noise, and can greatly reduce the amount of rewinding of the transfer tape. [Means for solving the problem]

[0018] The first invention is a coating film transfer tool in which a payout core and a take-up core are rotatably housed in a housing, a transfer head equipped with a transfer pressure section protrudes from the housing, a transfer tape is paid out from the payout core, the transfer pressure section separates the transfer tape into a coating film to be transferred to a transfer surface and the remaining base tape, and the base tape is taken up onto the take-up core, A reverse prevention mechanism is provided that prevents the rotation of the payout core in a direction opposite to the direction in which the transfer tape is paid out or the rotation of the take-up core in a direction opposite to the direction in which the base tape is wound up, and the reverse prevention mechanism comprises a ratchet gear provided continuously on the outer periphery of the payout core or the take-up core, or a rotating member that rotates together with the payout core or the pay-out core, and a shaft member having a reverse prevention pawl that engages with the ratchet gear to prevent the payout core from rotating in a direction opposite to the direction in which the transfer tape is paid out or the take-up core from rotating in a direction opposite to the direction in which the base tape is wound up, and the take-up core or the pay-out core, or the rotating member that rotates together with the take-up core or the pay-out core, is provided with a rotating shaft portion that rotates together with the take-up core or the pay-out core, and the shaft member is in contact with the outer periphery of the rotating shaft portion and is movable forward and backward in a tangential direction of the outer periphery of the rotating shaft portion. The coating film transfer tool is held within the housing, and when the rotating shaft portion rotates as the payout core rotates in the direction to pay out the transfer tape or the winding core rotates in the direction to wind up the base tape, frictional force with the outer periphery of the rotating shaft portion causes the shaft member to move in the tangential direction of the outer periphery of the rotating shaft portion, the anti-reverse pawl provided on the shaft member moves away from the ratchet gear, and the engagement between the anti-reverse pawl and the ratchet gear is released, and when the rotating shaft portion rotates as the payout core rotates in the direction opposite to the direction to pay out the transfer tape or the winding core rotates in the direction opposite to the direction to wind up the base tape, frictional force with the outer periphery of the rotating shaft portion causes the shaft member to move in the tangential direction of the outer periphery of the rotating shaft portion, the anti-reverse pawl provided on the shaft member moves closer to the ratchet gear, and the anti-reverse pawl and the ratchet gear engage.

[0019] The second invention further includes a stop portion that stops the movement of the anti-reverse pawl of the shaft member in a direction away from the ratchet gear, and when the payout core rotates in a direction to pay out the transfer tape or the take-up core rotates in a direction to take up the base tape, the rotating shaft portion rotates together with the payout core or the take-up core, and the shaft member moves in a tangential direction of the outer periphery of the rotating shaft portion due to a frictional force with the outer periphery of the rotating shaft portion, and the anti-reverse pawl provided on the shaft member moves away from the ratchet gear, and after the engagement between the anti-reverse pawl and the ratchet gear is released, the shaft member comes into contact with the stop portion and shaft member The coating film transfer tool according to the first invention is characterized in that, when the movement of the coating film transfer tool is stopped, the shortest distance between the circumference connecting the maximum outer diameter parts of the ratchet gear and the position of the reverse rotation prevention pawl that is closest to the ratchet gear among the parts of the shape that engages with the ratchet gear is 0.5 mm or more and 1 mm or less. [Effects of the Invention]

[0020] The reverse rotation prevention mechanism of the present invention is composed of a ratchet gear provided continuously on the outer periphery of the winding core or the payout core, or on the outer periphery of a rotating member that rotates together with the winding core or the payout core, and an axial member having a reverse rotation prevention claw that engages with the ratchet gear to prevent the payout core from rotating in the direction opposite to the direction in which the transfer tape is paid out (hereinafter referred to as reverse rotation), or the winding core from rotating in the direction opposite to the direction in which the base tape is wound (hereinafter also referred to as reverse rotation). Furthermore, a rotating shaft is provided on the winding core or the payout core, or on a rotating member that rotates together with the winding core or the payout core, and the shaft member is in contact with the outer periphery of the rotating shaft member and is held within the housing so as to be movable in a tangential direction to the outer periphery of the rotating shaft member, and as the rotating shaft member rotates in the direction in which the payout core pays out the transfer tape (hereinafter referred to as forward rotation) or the winding core rotates in the direction in which the base tape is wound up (also hereinafter referred to as forward rotation), the frictional force with the outer periphery of the rotating shaft member causes the shaft member to move in the tangential direction to the outer periphery of the rotating shaft member, and the reverse rotation preventing pawl provided on the shaft member moves away from the ratchet gear, thereby disengaging the reverse rotation preventing pawl from the ratchet gear. On the other hand, as the rotating shaft member rotates in the reverse direction of the payout core or the winding core, the frictional force with the outer periphery of the rotating shaft member causes the shaft member to move in the tangential direction to the outer periphery of the rotating shaft member, and the reverse rotation preventing pawl provided on the shaft member moves closer to the ratchet gear, thereby engaging the ratchet gear.

[0021] In this way, in the reverse prevention mechanism of the present invention, when the supply core or take-up core rotates in the forward direction, the frictional force with the outer periphery of the rotating shaft causes the shaft member to move in the tangential direction of the outer periphery of the rotating shaft, and the reverse prevention pawl provided on the shaft member moves away from the ratchet gear, disengaging the reverse prevention pawl from the ratchet gear. Therefore, during forward rotation, the ratchet pawl and the ratchet gear can be kept out of engagement, and noise caused by the reverse prevention mechanism can be reliably prevented when the coating film is transferred by the coating film transfer tool. On the other hand, in the reverse prevention mechanism of the present invention, when the supply core or take-up core rotates in the reverse direction, the frictional force with the outer periphery of the rotating shaft causes the shaft member to move in the tangential direction of the outer periphery of the rotating shaft, and the reverse prevention pawl provided on the shaft member reliably engages with the ratchet gear, thereby reliably preventing the supply core or take-up core from rotating in the reverse direction. Furthermore, by providing a stop member or the like that stops the movement of the shaft member when the payout core or take-up core is rotating in the forward direction, the distance between the reverse rotation prevention claw and the ratchet gear when the payout core or take-up core is rotating in the forward direction can be adjusted, and by reducing this distance, it is possible to greatly reduce the amount of tape rewind when the core is rotating in the reverse direction (the amount of transfer tape rewinding can be greatly reduced).In addition, the ratchet gear and rotating shaft portion can be provided integrally with the payout core or take-up core, and the reverse rotation prevention mechanism of the present invention can be constructed by simply adding the shaft member, and the reverse rotation prevention function can be achieved with a very simple structure. [Brief explanation of the drawings]

[0022] [Figure 1] 1 shows a coating film transfer tool A according to a first embodiment of the present invention. [Figure 2] 1 shows a reverse rotation prevention mechanism of a coating film transfer tool A according to a first embodiment of the present invention. [Figure 3] FIG. 10 is a diagram showing a reverse rotation prevention mechanism of a conventional coating film transfer tool. [Figure 4] FIG. 2 is a diagram showing a method for measuring a friction coefficient. [Figure 5] 10 is a diagram showing the position of the mounting pin of the shaft member 1. FIG. [Figure 6] FIG. 2 is a view showing a shaft member 1. DETAILED DESCRIPTION OF THE INVENTION

[0023] FIG. 1 shows a film transfer tool A according to a first embodiment of the present invention. FIG. 1(a) is a front view with the upper case removed. To illustrate the positional relationship, the stopper 6A and the retaining portion 6B provided on the upper case 6, as well as the shaft member 1 held by the upper case 6 and incorporated into the film transfer tool A by attaching the upper case 6 to the lower case 5 to which the payout core 2 is attached, are shown in phantom lines. FIG. 1(b) is a view taken along the X arrow in FIG. 1(a). FIG. 1(c) is a cross-sectional view taken along the YY arrow in FIG. 1(a). FIG. 1(d) is a bottom view of the film transfer tool A. FIG. 1(e) is an enlarged view showing the details of the contact portion between the shaft member 1 and the rotating shaft portion 2B. The figure shows the device rotated 45° to the left with the payout core 2 in FIG. 1(a) as the center of rotation. Note that FIGS. 1(b), 1(c), and 1(d) show the device with the upper case attached.

[0024] The coating film transfer tool A is composed of a lower case 5, an upper case 6, transfer tape T with a coating film coated on base tape S, a supply reel with transfer tape T wound around a payout core 2, a transfer head 4 protruding from an opening formed by the lower case 5 and the upper case 6 to transfer the coating film coated on transfer tape T to the surface of a receiving material such as paper, a take-up reel that takes up the base tape S onto the take-up core 3 after the coating film has been transferred, a belt 7 that is looped around pulleys provided on the pay-out core 2 and the take-up core 3 and transmits the rotation of the pay-out core 2 to the take-up core 3, and a shaft member 1.

[0025] In the coating film transfer tool A, a belt 7 is used as a transmission method for transmitting the rotation of the payout core 2 to the take-up core 3, but transmission by gears or the like is also possible and there are no particular limitations. Also, in the coating film transfer tool A, the slip mechanism that absorbs the difference in peripheral speed between the payout side and the take-up side also uses the belt 7 and the slip between the pulley provided on the payout core 2 and the pulley provided on the take-up core 3, but a slip mechanism using a slip ring, coil spring, resin spring or the like can also be used and there are no particular limitations on the method.

[0026] In coating film transfer tool A, when transfer tape T is pressed against a receiving surface, such as paper, by transfer pressure section 4A at the tip of transfer head 4, and coating film transfer tool A is moved, the coating is transferred from transfer tape T to the receiving surface, and transfer tape T is unwound from payout core 2. As transfer tape T is unwound from payout core 2, payout core 2 rotates, and belt 7, which is wound around the pulley of payout core 2, also moves with the rotation of the pulley. As belt 7 moves, the rotation of payout core 2 is transmitted to take-up core 3, which rotates. The rotation transmitted by the pulley causes take-up core 3 to take up the remaining base tape S on which the coating has been transferred by transfer head 4, allowing transfer tape T to run without slack. In coating film transfer tool A, the rotation ratio between the payout core and take-up core is set so that the length of base tape S wound by take-up core 3 is longer than the length of transfer tape T unwound from payout core 2, preventing transfer tape T from slackening. Furthermore, the difference between the wound length of the base tape S and the unwound length of the transfer tape T is absorbed by the sliding between the pulley of the winding core 3 and the belt 7, so the transfer tape T is not pulled and cut.

[0027] Figure 2 shows the reverse rotation prevention mechanism of coating film transfer tool A. In coating film transfer tool A, the reverse rotation prevention mechanism is provided in the payout core 2. Figures 2(a) and 2(b), like Figure 1(e), are enlarged views showing the details of the contact area between the shaft member 1 and the rotating shaft portion 2B, and show a state rotated 45° to the left with respect to the center of rotation of the payout core 2 in Figure 1(a). Figure 2(a) shows the state in which the payout core 2 of the coating film transfer tool A is rotating in the forward direction, i.e., the state in which the payout core 2 is unwinding the transfer tape. Figure 2(b) shows the state in which the payout core 2 of the coating film transfer tool A is rotating in the reverse direction. For example, when the transfer head 4 of the coating film transfer tool A presses the transfer tape T against the substrate, the transfer head 4 is moved in the direction opposite to the coating film transfer direction, and the base tape is pulled from the take-up core 3, causing the take-up core 3 and the payout core 2 to rotate in conjunction, causing the payout core 2 to rotate in the direction opposite to the direction in which the transfer tape is unwound. Figure 2(c) is a partial enlargement of Figure 2(a), and Figure 2(d) is a partial enlargement of Figure 2(b), showing the positional relationship between the reverse rotation prevention pawl 1A of the shaft member 1 and the ratchet gear 2A of the payout core 2 in each state. Figure 2(e) is an enlarged view of the ZZ cross section of Figure 2(a), showing the state in which the upper case 6 is attached. In the coating film transfer tool A, the rotating shaft portion 2B and the ratchet gear 2A are integrally provided on the payout core 2, but the rotating shaft portion 2B and / or the ratchet gear 2A may be provided on a separate member that rotates together with the payout core 2.

[0028] As shown in Figures 2(a) and 2(b), the reverse rotation prevention mechanism of the coating film transfer tool A is composed of a ratchet gear 2A and a rotating shaft 2B integrally mounted on the payout core 2, a shaft member 1, a stopper (stopping portion) 6A mounted on the upper case 6, a holding portion 6B similarly mounted on the upper case 6 and movably holding the shaft member 1 in contact with the rotating shaft 2B, and a restricting portion 6C. The shaft member 1 has a reverse rotation prevention pawl 1A that engages with the ratchet gear 2A, and a shaft portion 1B that is movably held between the rotating shaft 2B and the holding portion 6B. After the shaft member 1 is attached to a predetermined position in the upper case 6 using a jig or the like, the upper case 6 with the attached shaft member 1 can be fitted into the lower case 5, which has all the internal parts installed other than the shaft member 1, thereby assembling the shaft member 1 in its predetermined position within the coating film transfer tool A. For example, if a jig is prepared that has pins provided at the three positions marked with number 8 in Fig. 5 and that can mount the upper case 6 so that the outer surface of the upper case 6 comes into contact with the jig, and the upper case 6 is provided with three holes into which the three pins provided on the jig can be inserted, then by mounting the upper case on the jig, the three pins on the jig can be made to protrude into the interior of the upper case 6. If the shaft portion 1B of the shaft member 1 is sandwiched between the two holding portions 6B and the two pins near the holding portions 6B, and the shaft member 1 is mounted so that the stopper mounting portion 1C of the shaft member 1 fits between the stopper (stop portion) 6A and the pin near the stopper (stop portion) 6A, the shaft member 1 can be mounted at a predetermined position within the upper case 6. Furthermore, if the shaft member 1 can be held by the pin and holding portion 6B, the upper case 6 with the shaft member 1 attached inside while attached to the jig can be fitted into the lower case 5 which incorporates internal parts other than the shaft member 1, thereby making it possible to attach the shaft member 1 to a predetermined position in the coating film transfer tool A. If the jig is removed after the upper case 6 and the lower case 5 are fitted together, the three pins can be pulled out from inside the upper case 6.

[0029] In the coating film transfer tool A, when the payout core 2 shown in Fig. 2(a) is paying out the transfer tape T, the rotating shaft 2B that is integral with the payout core 2 also rotates in the same direction and at the same rotational speed as the payout core 2. The shaft member 1, which is in contact with the rotating shaft 2B, moves to the right in Fig. 2(a) due to the frictional force with the rotating shaft 2B, disengaging the reverse rotation prevention pawl 1A from the ratchet gear 2A and allowing the payout core 2 to rotate. When the payout core 2 rotates further to pay out the transfer tape T, the frictional force with the rotating shaft 2B presses the shaft member 1 to move further to the right in Fig. 2(a), but the stopper mounting portion 1C of the shaft member 1 comes into contact with the stopper (stop portion) 6A, preventing it from moving further to the right.

[0030] In the coating film transfer tool A, the frictional force between the shaft member 1 and the rotating shaft portion 2B is set so that when the stopper mounting portion 1C of the shaft member 1 is not in contact with the stopper (stop portion) 6A, the shaft member 1 can move without slipping relative to the rotating shaft portion 2B, but when the stopper mounting portion 1C of the shaft member 1 is in contact with the stopper (stop portion) 6A and is stopped, the rotating shaft portion 2B rotates by sliding relative to the shaft member 1, and the payout core 2 can pay out the transfer tape T. By setting the frictional force between the shaft member 1 and the rotating shaft portion 2B in this way, even when the stopper mounting portion 1C of the shaft member 1 is in contact with the stopper (stop portion) 6A and cannot move, the rotating shaft portion 2B can rotate by sliding relative to the shaft member 1, and the payout core 2 can pay out the transfer tape T stably.

[0031] In the coating film transfer tool A, in the state shown in Figure 2(a), when the payout core 2 rotates (reverses) in the direction opposite to the direction in which the transfer tape T is paid out, the rotating shaft portion 2B also rotates (reverses) in the same direction and at the same rotational speed as the payout core 2. Then, the shaft member 1, which is in contact with the rotating shaft portion 2B, moves to the left in Figure 2(a) due to the frictional force with the rotating shaft portion 2B, reaching the state shown in Figures 2(b) and 2(d) in which the reverse prevention pawl 1A provided on the shaft member 1 and the ratchet gear 2A are engaged. When the reverse prevention pawl 1A and the ratchet gear 2A are engaged, as shown in Figures 2(b) and 2(d), the contacting surfaces of the ratchet gear 2A and the reverse prevention pawl 1A are shaped to press against each other in a direction perpendicular to the contacting surfaces of the other, so that the ratchet gear 2A cannot get past the reverse prevention pawl 1A, preventing the payout core 2 from rotating reversely.

[0032] 2(a) in which the stopper mounting portion 1C of the shaft member 1 is in contact with the stopper (stop portion) 6A, the shortest distance d between the circumference connecting the maximum outer diameter portions of the ratchet gear 2A provided on the payout core 2 and the portion of the reverse rotation prevention pawl 1A provided on the shaft member 1 that engages with the ratchet gear 2A that is closest to the ratchet gear 2A is preferably 0.5 mm or more and 1 mm or less. If this shortest distance d is less than 0.5 mm, the tip of the reverse rotation prevention pawl 1A may come into contact with the ratchet gear 2A during use of the coating film transfer tool A, hindering the rotation of the payout core 2 and preventing the payout core 2 from paying out the transfer tape T, which is not preferable. Considering the clearance (so-called "backlash") of the support portion where the payout core 2 is rotatably supported by the lower case 5 and the upper case 6, and the eccentricity of the outer diameter of the ratchet gear, the shortest distance d is preferably 0.5 mm or more. Furthermore, if the shortest distance d exceeds 1 mm, it may not be possible to minimize the amount of reverse rotation of the payout core 2 when the payout core 2 starts to rotate reversely, which is undesirable. Although it depends on the number of ratchet teeth provided around the outer periphery of the ratchet gear 2A and the size (width and height) of each ratchet tooth, if the shortest distance d is 1 mm or less, when the payout core 2 starts to rotate reversely, that is, in the direction opposite to the direction in which the transfer tape T is paid out, the reverse prevention pawl 1A and the ratchet gear 2A will immediately begin to engage and reach the state shown in Figure 2(b), thereby reliably reducing the amount of reverse rotation of the payout core 2 and reliably shortening the amount of rewinding of the transfer tape T.

[0033] In coating film transfer tool A, the reverse rotation prevention mechanism is in the state shown in Figure 2(a) during coating film transfer, and because the shortest distance d is between 0.5 mm and 1 mm, there is no contact between ratchet gear 2A and reverse rotation prevention pawl 1A. Therefore, with the simple configuration of coating film transfer tool A, which simply requires the addition of shaft member 1, it is possible to provide a coating film transfer tool that reliably prevents noise generated by the reverse rotation prevention mechanism.

[0034] In the coating film transfer tool A, the upper case 6 is provided with two holding portions 6B that movably hold the shaft portion 1B of the shaft member 1. The shaft portion 1B of the shaft member 1 is movably sandwiched between the two holding portions 6B and the rotating shaft portion 2B of the payout core 2. While it is possible to provide holding portions 6B in three or more locations, it is preferable to have fewer holding portions 6B so that the shaft member 1 can move as smoothly as possible with as little resistance as possible, and it is preferable to provide holding portions 6B in two locations. Furthermore, the shape of the holding portions 6B is preferably such that they make point or line contact with the shaft member 1 so that the shaft member 1 can move as smoothly as possible with as little resistance as possible, and a cylindrical shape such as that shown in FIG. 2 is preferable.

[0035] 2 is preferably slightly narrower than the width t2 of the shaft portion 1B of the shaft member 1 that is movably held between the holding portion 6B and the rotating shaft portion 2B. Meanwhile, the distance t3 between the upper case 6 and the payout core 2 where the shaft member 1 is attached is preferably slightly wider than the thickness t4 of the shaft portion 1B of the shaft member 1. The difference between t2 and t1 is set so that the frictional force between the rotating shaft portion 2B and the shaft member 1, which will be described later, falls within a preferred range. Specifically, the difference between t2 and t1 causes the shaft member 1 to elastically deform, causing the shaft member 1 to press against the rotating shaft portion 2B, and the frictional force between the rotating shaft portion 2B and the shaft member 1 that is generated by this pressing force is set so that it falls within a preferred range.

[0036] By setting the frictional force between the rotating shaft portion 2B and the shaft member 1 to be within a preferred range, when the payout core 2 begins to rotate reversely, the shaft member 1 immediately moves in the tangential direction of the outer periphery of the rotating shaft portion 2B and the reverse prevention pawl 1A engages with the ratchet gear 2A, thereby reducing the amount of reverse rotation of the payout core 2. Furthermore, when the stopper mounting portion 1C of the shaft member 1 is in contact with the stopper 6A and cannot move, the frictional force between the shaft member 1 and the rotating shaft portion 2B increases the rotational torque of the payout core 2, but by setting the frictional force between the rotating shaft portion 2B and the shaft member 1 to be within a preferred range, the rotational torque of the payout core 2 can be kept within an appropriate range, so the coating film transfer tool A does not become difficult for the user to use.

[0037] On the other hand, the difference between t4 and t3 is preferably 0.1 mm or more and 0.4 mm or less, more preferably 0.1 mm or more and 0.3 mm or less. As described above, in the coating film transfer tool A, the difference between the distance t1 between the holding portion 6B and the rotating shaft portion 2B and the width t2 of the shaft portion 1B of the shaft member 1, which is movably sandwiched between the holding portion 6B and the rotating shaft portion 2B, deflects the shaft member 1, generating frictional force between the shaft member 1 and the rotating shaft portion 2B. If frictional forces from other components act on the shaft member 1 at multiple locations, the frictional force acting on the shaft member 1 will be unstable. Therefore, when the shaft member 1 moves in the tangential direction of the outer periphery of the rotating shaft portion 2B, it is preferable that frictional force not act on the shaft member 1 at locations other than the contact point between the holding portion 6B and the rotating shaft portion 2B. For this reason, it is preferable that the distance t3 between the upper case 6 and the payout core 2 where the shaft member 1 is attached is slightly wider than the thickness t4 of the shaft portion 1B of the shaft member 1. It is not preferable for the difference between t4 and t3 to be less than 0.1 mm, since even a slight warp in the shaft member 1 can increase the frictional force generated between the shaft member 1 and the upper case 6 and the payout core 2. It is also not preferable for the difference between t4 and t3 to be more than 0.4 mm, since it can cause the shaft member 1 to tilt between the upper case 6 and the payout core 2, preventing the shaft member 1 from moving smoothly. In the coating film transfer tool A, t3 is set to a preferable dimension by providing two regulating portions 6C connected to the holding portion 6B of the upper case 6.

[0038] Furthermore, when the shaft member 1 is mounted inside the coating film transfer tool A, it is preferable that it not rotate around an axis whose central axis is the direction of movement of the shaft member 1. If the shaft member 1 rotates, even if the movement of the shaft member 1 results in the state shown in Figure 2(b), there is a risk that the reverse rotation prevention pawl 1A and the ratchet gear 2A will no longer engage. For this reason, it is preferable that the cross-sectional shape of the shaft member 1 is a square, as shown in Figure 2(e).

[0039] Furthermore, when the shaft member 1 is attached to the coating film transfer tool A, the friction coefficient k1 of the shaft member 1 with respect to the rotating shaft portion 2B with which the shaft member 1 comes into contact is preferably 0.32 or more and 1.59 or less, and more preferably 0.48 or more and 1.27 or less. If the friction coefficient k1 is less than 0.32, the force with which the shaft member 1 presses against the rotating shaft portion 2B cannot generate sufficient friction, so the rotating shaft portion 2B and the shaft member 1 tend to slip, and if the payout core 2 rotates in the direction opposite to the direction in which the transfer tape T is paid out, there is a risk that the engagement of the reverse rotation prevention pawl 1A with the ratchet gear 2A will be delayed, the amount of reverse rotation of the payout core 2 will increase, and the length of the transfer tape T that is unwound will be longer. On the other hand, when the payout core 2 rotates in the direction of paying out the transfer tape T, if the anti-reverse claw 1A is engaged with the ratchet gear 2A, the engagement between the anti-reverse claw 1A and the ratchet gear 2A may not be immediately released, which may result in the coating film not being transferred to the surface to be transferred.

[0040] If the friction coefficient k1 exceeds 1.59, even a slight increase in the force with which the shaft member 1 presses against the rotating shaft portion 2B will significantly increase the frictional force, making it difficult for the rotating shaft portion 2B and the shaft member 1 to slide. This is undesirable because it increases the force required to pay out the transfer tape T when transferring the coating film using the coating film transfer tool A, which could result in poor coating film transfer. When the payout core 2 rotates in the direction to pay out the transfer tape T and the stopper mounting portion 1C of the shaft member 1 comes into contact with the stopper (stop portion) 6A, the shaft member 1 cannot move any further and is stopped in that position. Because the shaft member 1 is stopped, in order for the payout core 2, including the rotating shaft portion 2B, to rotate and pay out the transfer tape T, the payout core 2, including the rotating shaft portion 2B, must rotate, overcoming the frictional force generated between the rotating shaft portion 2B and the shaft member 1. In the coating film transfer tool A, the force that rotates the payout core 2 in order to pay out the transfer tape T from the payout core 2 is the force that pays out the transfer tape T. The force that pays out the transfer tape T is a force that is generated when the transfer head 4 moves while pressing the transfer tape T against the transfer target. If the friction coefficient k1 exceeds 1.59, the force that rotates the payout core 2 becomes greater than the force that pays out the transfer tape T generated by the transfer head 4, and the force that pays out the transfer tape T will no longer be able to rotate the payout core 2, which may make it impossible to transfer the coating, which is undesirable.

[0041] The friction coefficient k1 of the shaft member 1 with respect to the rotating shaft portion 2B can be measured using the following procedure. First, as shown in Figure 4, attach the payout core 2 to the rotating shaft of the torque measuring device. Next, fix the shaft member 1 so that the rotating shaft portion 2B of the payout core 2 and the shaft member 1 are in contact with each other, in the same position as when they are installed in the coating film transfer tool A. In this state, apply a load of 0.98 N so that the shaft member 1 presses the rotating shaft portion 2B, and rotate the rotating shaft of the torque measuring device for 30 seconds. The maximum torque value measured during this period is measured as the torque TR (N·m). The rotation speed of the torque measuring device's rotating shaft is set to the rotation speed at which the peripheral speed of the part of the rotating shaft portion 2B that contacts the shaft member 1 is 0.05 m / s. The radius of the part of the rotating shaft portion 2B that contacts the shaft member 1 when centered on the rotating shaft is defined as R (m), and the friction coefficient k1 is calculated by applying the measured torque to the following equation. k1=TR / (0.98·R)

[0042] The preferable friction force between the rotating shaft portion 2B and the shaft member 1 depends on the transfer tape length and width of the coating film transfer tool, but for a general coating film transfer tool, it is 1.96 x 10 when converted into the rotational torque of the payout core. -4 N m or more 4.90×10 -4 N·m or less is preferable. Torque is 1.96×10 -4 If the torque is less than 4.90×10 N·m, even if the winding core starts to rotate in the reverse direction, slippage occurs between the rotating shaft portion 2B and the shaft member 1, delaying the movement of the shaft member 1, which in turn delays the engagement of the reverse prevention pawl 1A and the ratchet gear 2A, and the amount of reverse rotation of the payout core 2 may increase. -4 If the torque exceeds N·m, the torque required to rotate the take-up core when the payout core 2 is rotating in the forward direction will be large, making it difficult for the user to use the coating film transfer tool and possibly resulting in poor coating film transfer.

[0043] The shaft member 1 of the coating film transfer tool A is preferably made of a lightweight material that can be easily surface-processed to adjust the surface friction coefficient. Examples of such materials include various molding resins. Examples include PE (polyethylene), PP (polypropylene), AS (acrylonitrile-styrene resin), ABS (acrylonitrile butadiene-styrene resin), POM (polyacetal), PA (polyamide), PC (polycarbonate), PPS (polyphenylene sulfide), PBT (polybutylene terephthalate), PET (polyethylene terephthalate), and HIPS (high-impact polystyrene). Among these resins, POM (polyacetal) and PC (polycarbonate) are particularly preferred because they stabilize the force with which the shaft member 1 presses against the rotating shaft portion 2B over time. The surface friction coefficient can be adjusted by providing fine irregularities, such as graining, on the surface.

[0044] In the coating film transfer tool A, the reverse rotation prevention mechanism is provided on the payout core 2 side, but the reverse rotation prevention mechanism may be provided on the take-up core 3 side, or may be provided on both the take-up core 3 and the pay-out core 2. If a reverse prevention mechanism is provided on both cores 2, the tension of the transfer tape T drawn out by the transfer head 4 increases, making it difficult for the user to use the coating film transfer tool and more likely to result in poor transfer of the coating film, so it is preferable to provide the reverse prevention mechanism on either the payout core 2 side or the take-up core 3 side. If the reverse prevention mechanism is provided on the payout core 2 side, the payout core will not rotate in reverse, preventing the transfer tape T from being unwound. If the reverse prevention mechanism is provided on the take-up core 3 side, the take-up core will not rotate in reverse, preventing the transfer tape from being unwound. Furthermore, even if the user accidentally runs the coating film transfer tool in the opposite direction to the normal transfer direction with the transfer head pressed against the surface to be transferred, the base tape S after transfer will not be drawn out from the take-up core.

[0045] 1: Shaft member 1A(3C): Anti-reverse claw 1B: Shaft part 1C: Stopper mounting part 2: Payout core 2A(5C): Ratchet gear 2B: Rotating shaft 3: Winding core 4: Transfer head 4A: Transfer pressing section 5: Lower case 6: Upper case 6A: Stopper (stop part) 6B: Holding part 6C: Regulation Department 7: Belt A: Coating film transfer tool T: Transfer tape S: Base tape

Claims

1. A coating film transfer tool in which a payout core and a take-up core are rotatably housed in a housing, a transfer head having a transfer pressure section protrudes from the housing, a transfer tape is paid out from the payout core, the transfer pressure section separates the transfer tape into a coating film to be transferred to a surface to be transferred and the remaining base tape, and the base tape is taken up onto the take-up core, A reverse rotation prevention mechanism is provided that prevents the rotation of the payout core in a direction opposite to the direction in which the transfer tape is paid out or the rotation of the take-up core in a direction opposite to the direction in which the base tape is wound up, and the reverse rotation prevention mechanism comprises a ratchet gear provided continuously on the outer periphery of the payout core or the take-up core, or a rotating member that rotates together with the payout core or the pay-out core, and a shaft member having a reverse rotation prevention claw that engages with the ratchet gear to prevent the payout core from rotating in a direction opposite to the direction in which the transfer tape is paid out or the take-up core from rotating in a direction opposite to the direction in which the base tape is wound up, and the take-up core or the pay-out core, or the rotating member that rotates together with the take-up core or the pay-out core, is provided with a rotating shaft portion that rotates together with the take-up core or the pay-out core, and the shaft member is in contact with the outer periphery of the rotating shaft portion and is movable in a tangential direction of the outer periphery of the rotating shaft portion. a coating film transfer tool that is held within the housing, and when the rotating shaft portion rotates as the payout core rotates in the direction to pay out the transfer tape or the winding core rotates in the direction to wind up the base tape, frictional force with the outer periphery of the rotating shaft portion causes the shaft member to move in the tangential direction of the outer periphery of the rotating shaft portion, causing the anti-reverse pawl provided on the shaft member to move away from the ratchet gear and disengaging the anti-reverse pawl from the ratchet gear; and when the rotating shaft portion rotates as the payout core rotates in the direction opposite to the direction to pay out the transfer tape or the winding core rotates in the direction opposite to the direction to wind up the base tape, frictional force with the outer periphery of the rotating shaft portion causes the shaft member to move in the tangential direction of the outer periphery of the rotating shaft portion, causing the anti-reverse pawl provided on the shaft member to approach the ratchet gear and engaging with the ratchet gear.

2. 2. The coating film transfer tool according to claim 1, further comprising a stop portion that stops the movement of the anti-reverse pawl of the shaft member in a direction away from the ratchet gear, wherein when the payout core rotates in a direction to pay out the transfer tape or the take-up core rotates in a direction to take up the base tape, the rotating shaft portion rotates together with the payout core or the take-up core, and the shaft member moves in a tangential direction to the outer periphery of the rotating shaft portion due to frictional force with the outer periphery of the rotating shaft portion, the anti-reverse pawl provided on the shaft member moves away from the ratchet gear, and the engagement between the anti-reverse pawl and the ratchet gear is released, and then the shaft member comes into contact with the stop portion and the movement of the shaft member is stopped, the shortest distance between a circumference connecting the maximum outer diameter portions of the ratchet gear and a position of the anti-reverse pawl that engages with the ratchet gear that is closest to the ratchet gear is 0.5 mm or more and 1 mm or less.

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