JP7221841B2 - Transmission belt mark printing method and transmission belt mark printing system - Google Patents

Description

The present invention relates to a transmission belt mark printing method, which is a method of printing marks on a transmission belt, and a transmission belt mark printing system for printing marks on a transmission belt.

2. Description of the Related Art Conventionally, circular power transmission belts used for transmitting power display product-related information such as the manufacturer's name, product brand name, manufacturing lot number, date of manufacture, country of manufacture, and logo. As a method of displaying a mark composed of characters, patterns, etc. including these on the transmission belt, for example, the mark is printed on a base material composed of a film, and the mark is transferred to the transmission belt through this base material. Therefore, a method of displaying a mark on the transmission belt is used.

Other methods of displaying marks on the transmission belt include spraying ink on the transmission belt, pressing a stamp filled with ink against the transmission belt, or providing a mark to form unevenness on the surface of the transmission belt. There is a way. However, the method of spraying ink onto the transmission belt, the method of pressing a stamp filled with ink against the transmission belt, and the method of forming unevenness on the surface of the transmission belt impose a very heavy burden on the operator. It also requires a lot of working hours. Therefore, in order to efficiently display marks on many transmission belts, conventionally, a method of transferring marks to the transmission belts via a base material on which the marks are printed has been used.

For example, Patent Literature 1 discloses a method of printing a mark by using a transparent film made of synthetic resin as a base material and transferring the mark through the base material. In this method, marks are printed in advance on a substrate made of a film. Then, in the manufacturing process of the transmission belt, the base material on which the mark is printed is superimposed on the rubber belt made of an unvulcanized rubber material, and the rubber belt is vulcanized in this state, thereby vulcanizing the rubber belt. The mark is transferred to the rubber belt by thermal welding. As a result, the mark is printed and displayed on the transmission belt formed by vulcanizing the rubber belt.

JP-A-5-42754

The operation of stacking the base material made of film on which the mark is printed on the unvulcanized rubber belt is performed manually on the narrow rubber belt, and each rubber belt is printed in a predetermined print area. This is done by arranging a number of substrates in correspondence. In addition, the film, which is the base material used for transfer, is manually peeled off after vulcanization.

As described above, in the method of transferring the mark to the transmission belt via the base material on which the mark is printed, many films as the base material are manually arranged on the narrow rubber belt. of work time is required. In addition, there is the problem that the work of manually peeling off the base film after vulcanization is troublesome and requires a lot of work time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a transmission belt mark printing method and a transmission belt mark printing system capable of shortening the work time for printing marks on a transmission belt. .

(1) A method of printing a mark on a power transmission belt according to an aspect of the present invention for solving the above-mentioned problems is provided by: A vulcanization step of vulcanizing by a mold configured to sandwich the unvulcanized transmission belt between the pair of pulleys; and a mark printed on the transmission belt is filled with ink. a first transfer step in which the mark is transferred from a supply device to a pad as a transfer medium; and a second transfer step in which the mark is transferred to the transmission belt by being pressed against the belt.

In the transmission belt mark printing method, the mark transferred to the pad in the first transfer step is transferred to the vulcanized transmission belt held by the pair of pulleys. That is, according to the above configuration, in the mark printing on the transmission belt, the mark is printed on the base material composed of the film, the base material is superimposed on the rubber belt in an unvulcanized state, and the rubber belt with the base material superposed thereon is formed. The vulcanization eliminates the conventional process of transferring marks to the transmission belt by heat welding during vulcanization. Therefore, according to the above configuration, the conventional work requiring a lot of work time, such as arranging a large number of substrates on which marks are printed on a narrow rubber belt, becomes unnecessary, and the work time can be shortened. Further, as described above, since the mark can be transferred to the transmission belt while it is held by the pair of pulleys after vulcanization, the working time can be shortened. When the mark is transferred to the transmission belt, it is conceivable that the transmission belt is removed from the mold, conveyed to a location where the transfer is performed, and the mark is transferred to the conveyed transmission belt. In this case, it is necessary to remove the transmission belt from the mold, transport it to a transfer location, and align it. However, according to the transmission belt mark printing method, there is no need to remove the transmission belt, convey it to a transfer location, and align it. Therefore, it is possible to further shorten the working time for printing marks on the transmission belt.

Further, in the above-described mark printing method for the transmission belt, in the first transfer step, the mark printed on the transmission belt is transferred to a pad as a transfer medium, and in the second transfer step, in the first transfer step The mark transferred to the pad is transferred to the vulcanized transmission belt. That is, the mark is transferred using a pad as a transfer medium for transferring the mark. Therefore, according to the above-described method for printing marks on a transmission belt, it is not necessary to print marks using a base material as in the conventional art, and a pad is used as a transfer medium, and the mark transferred to the pad is simply pressed against the transmission belt. can print marks on the transmission belt. As a result, it is possible to continuously and easily print marks on the transmission belt, and it is possible to shorten the working time for printing.

In addition, according to the method of printing a mark on the transmission belt, it is not necessary to arrange the base material composed of the film on the transmission belt. No mistakes are made. In addition, since the base material is not used in the first place, there is no problem in displaying marks on the transmission belt when the film as the base material is wrinkled, bent, or distorted.

Furthermore, according to the method of printing the mark on the transmission belt, since the film as the base material is not used, the work time required for peeling off the film from the vulcanized transmission belt becomes unnecessary, and the work time for printing is shortened. be able to.

Therefore, according to the above configuration, it is possible to provide a method for printing marks on a transmission belt that can shorten the work time for printing marks on the transmission belt.

(2) Preferably, the method for printing marks on a transmission belt further includes a cooling step of cooling the transmission belt onto which the marks have been transferred in the second transfer step.

In the above-described method for printing marks on a transmission belt, in addition to the vulcanization process, the first transfer process, and the second transfer process, a cooling process is performed on the transmission belt onto which the marks have been transferred. That is, the second transfer step in which the marks are transferred to the transmission belt is performed before the vulcanized transmission belt is cooled. For this reason, the mark is transferred to the transmission belt which is still hot after vulcanization, thereby promoting the drying of the mark. That is, the heat applied to the transmission belt during vulcanization can be effectively used to dry the marks transferred to the transmission belt in a short time. Furthermore, when the mark is printed after cooling the vulcanized power transmission belt, a separate mark drying step is required, but such a step is not required.

(3) Preferably, in the method of printing a mark on a power transmission belt, in the vulcanization step, an inner peripheral mold is arranged on the inner peripheral side of the power transmission belt and an outer peripheral mold is arranged on the outer peripheral side of the power transmission belt. The plurality of transmission belts wound around the pair of pulleys are rotated so as to interlock with the opening and closing of the mold.

In the above-described mark printing method for the transmission belt, the movement of the unvulcanized portion of the transmission belt can be performed by a pair of pulleys interlocked with the opening and closing of the molds arranged on the inner and outer peripheral sides of the transmission belt. For this reason, when vulcanizing the power transmission belt, while moving the unvulcanized portion of the power transmission belt wound around the pair of pulleys, the inner peripheral die and the outer peripheral side of the power transmission belt are moved. The entire transmission belt can be continuously and efficiently vulcanized together with the arranged outer peripheral mold. After the transmission belt is vulcanized, the mold is opened, and the mark can be efficiently transferred to the entire circumference of the transmission belt while the transmission belt is rotated by the pair of pulleys. As a result, it is possible to further shorten the working time for printing marks on the transmission belt.

(4) Preferably, in the method for printing marks on a transmission belt, in the cooling step, the transmission belt is brought into contact with a cooling medium between the mold and the pulleys while being circulated by the pair of pulleys.

In the transmission belt mark printing method, the cooling process is performed by bringing the cooling medium into contact with the transmission belt that is circulated by the pair of pulleys. In addition, cooling of the transmission belt can take place between the mold and the pulleys. Therefore, the cooling process can be performed as it is without the need to transport the transmission belt from the place where the vulcanization process and the second transfer process have been performed. That is, the transmission belt can be efficiently and easily cooled after the mark is printed on the transmission belt.

(5) Preferably, in the method for printing a mark on a transmission belt, the mark is transferred from the ink supply device in the first transfer step to the pad, and the pad rotates extending parallel to the rotation shafts of the pair of pulleys. a columnar main body provided rotatably around an axis; and in the second transfer step, the columnar main body of the pad moves around the gold while the transmission belt is rotated by the pair of pulleys. Between the mold and the pulley, the mark is transferred to the transmission belt by being pressed against the transmission belt and rotating in conjunction with the circular movement of the transmission belt.

In the transmission belt mark printing method described above, the pad is rotatably provided around the pad rotation axis extending parallel to the rotation axis of the pair of pulleys while the mark is transferred from the ink supply device in the first transfer step. It has a cylindrical body. In the second transfer step, the pad provided with the columnar main body portion is pressed against the transmission belt between the mold and the pulley. Therefore, in the second transfer step, the mark is transferred to the transmission belt without the pad interfering with the mold and the pulley. Further, when the pad having the columnar body portion to which the mark is transferred in the first transfer step transfers the mark to the transmission belt in the second transfer step, the columnar body portion is pressed against the transmission belt and the transmission belt rotates. Rotate as you move. Therefore, the mark to be transferred to the cylindrical main body can be transferred by rotating the pad with respect to the transmission belt wound around the pair of pulleys. As a result, even if the marks are arranged in the circumferential direction of the annular transmission belt, they can be easily transferred.

(6) A mark printing system for a transmission belt according to an aspect of the present invention for solving the above problems includes a vulcanizing device for vulcanizing a plurality of unvulcanized transmission belts, and the transmission belt filled with ink. and a transfer device for transferring the mark to the transmission belt in a vulcanized state, wherein the vulcanization device is provided with the annular unvulcanized transmission belt a pair of pulleys held in a state in which the belt is wound, and a mold configured to sandwich the unvulcanized transmission belt between the pair of pulleys and vulcanize the transmission belt, The ink supply device has an ink holding section that holds the filled ink, and a mark forming section that forms the mark by supplying the ink from the ink holding section, and the transfer device includes: a pad as a transfer medium onto which the mark formed in the mark forming portion is transferred; and the pad movably held and attached to the transmission belt held by the pair of pulleys in a vulcanized state. and a pad driving unit for driving the pad so as to transfer the mark transferred to the pad.

According to the mark printing system for the transmission belt of this embodiment, the mark transferred to the pad is transferred to the vulcanized transmission belt held by the pair of pulleys. In other words, in the above mark printing system for the transmission belt, the conventional process of transferring the mark to the transmission belt using a base material made of a film becomes unnecessary. Therefore, according to the above mark printing system for transmission belts, conventional work that requires a lot of work time, such as arranging a large number of substrates on which marks are printed on narrow rubber belts, is no longer required, and the work time can be shortened. can. Further, since the mark can be transferred to the transmission belt while being held by the pair of pulleys after vulcanization, the working time can be shortened. When transferring the mark to the transmission belt, it is conceivable to remove the transmission belt from the mold, convey the belt, and then transfer the mark to the conveyed transmission belt. In this case, it is necessary to remove the transmission belt from the mold, transport it to a transfer location, and align it. However, according to the transmission belt mark printing system, there is no need to remove the transmission belt, convey it to a transfer location, and align it. Therefore, it is possible to further shorten the working time for printing marks on the transmission belt.

Further, according to the mark printing system for the transmission belt of the present embodiment, the mark is transferred to the vulcanized transmission belt by the pad and the pad driving section that drives the pad. That is, the pad is moved by the driving force of the pad driving section, the mark formed in the mark forming section is transferred to the pad, and further transferred to the transmission belt held by a pair of pulleys in a vulcanized state. The mark is transferred. Therefore, according to the above mark printing system for the transmission belt, it is not necessary to print the mark using the base material as in the conventional art, and the pad is used as the transfer medium and is driven by the pad driving section, and the mark is transferred to the pad. A mark can be printed on the transmission belt simply by pressing the mark against the transmission belt. As a result, it is possible to continuously and easily print marks on the transmission belt, and it is possible to shorten the working time for printing.

In addition, according to the above mark printing system for the transmission belt, it is not necessary to arrange the base material composed of the film on the transmission belt. No mistakes are made. In addition, since the base material is not used in the first place, there is no problem in displaying marks on the transmission belt when the film as the base material is wrinkled, bent, or distorted.

Furthermore, according to the above mark printing system for the transmission belt, since the film as the base material is not used, the work time for peeling off the film from the vulcanized transmission belt becomes unnecessary, and the work time for printing is shortened. be able to.

Therefore, according to the above-described mark printing system for the transmission belt, it is possible to provide a mark printing system for the transmission belt that can shorten the work time for printing the mark on the transmission belt.

(7) Preferably, in the mark printing system for a power transmission belt, the pad has a cylindrical main body portion rotatably provided around a pad rotation axis extending parallel to the rotation axis of the pair of pulleys, and the pair of While the pulley of (1) rotates the transmission belt, the cylindrical main body is pressed against the transmission belt and rotates in conjunction with the rotation of the transmission belt between the mold and the pulley. to transfer the mark to the transmission belt.

In the transmission belt mark printing system described above, the pad has a columnar body portion rotatably provided around the pad rotation axis extending parallel to the rotation axis of the pair of pulleys, and the columnar body portion is A pad having a mold is rotatably provided between the mold and the pulley. Therefore, the mark is transferred to the transmission belt without the pad interfering with the mold and the pulley. Further, when the pad having the columnar body portion to which the mark is transferred is to transfer the mark to the transmission belt, the columnar body portion is pressed against the transmission belt and rotates in conjunction with the circular movement of the transmission belt. Therefore, the mark to be transferred to the cylindrical main body can be transferred by rotating the pad with respect to the transmission belt wound around the pair of pulleys. As a result, even if the marks are arranged in the circumferential direction of the annular transmission belt, they can be easily transferred.

INDUSTRIAL APPLICABILITY The present invention can provide a method for printing marks on a transmission belt and a system for printing marks on a transmission belt, which can shorten the work time for printing marks on the transmission belt.

4 is a flowchart for explaining steps of a method for printing marks on a transmission belt according to an embodiment of the present invention; FIG. 2 is a cross-sectional view of a mark printing system used when carrying out a method of printing marks on a transmission belt; 1 is a plan view of a mark printing system used in carrying out a method of printing marks on a transmission belt; FIG. FIG. 4 is a plan view of a vulcanizing device in the mark printing system shown in FIG. 3; FIG. 4 is a side view showing the vulcanizing device in the mark printing system shown in FIG. 3, showing the vulcanizing device with the mold open; FIG. 4 is a side view showing the vulcanizing device in the mark printing system shown in FIG. 3, showing the vulcanizing device in a state where the mold is closed; FIG. 6 is a cross-sectional view of the vulcanizing device shown in FIG. 5 taken along the line AA. FIG. 6 is a cross-sectional view of the vulcanizing device shown in FIG. 5 taken along the line BB. FIG. 3 is a schematic diagram for explaining an ink holding section and a mark forming section of an ink supply device used in a method for printing marks on a transmission belt; FIG. 4 is a diagram for explaining an ink removing device used in a method of printing marks on a transmission belt; FIG. 4 is a diagram for explaining a mark forming unit used in a method of printing marks on a transmission belt; FIG. 4 is a diagram showing an example for explaining the operation of mark printing by the mark printing system for the transmission belt, and is a diagram schematically showing a state in which marks are transferred to a transfer medium. FIG. 4 is a diagram showing an example for explaining the operation of mark printing by the mark printing system for the transmission belt, and schematically showing a state in which marks are transferred to the transmission belt. 4 is a table describing a printing process for printing marks on a transmission belt in an example. FIG. 2 is a table showing a list of evaluation items and evaluation results for the printed state of marks on a transmission belt printed in Examples. FIG.

EMBODIMENT OF THE INVENTION Hereinafter, it demonstrates, referring drawings for the form for implementing this invention. The present invention can be widely applied to various uses as a transmission belt mark printing method, which is a method of printing marks on a transmission belt, and a transmission belt mark printing system for printing marks on a transmission belt. It is possible.

[Overview of mark printing method]
Hereinafter, a method for printing marks on a transmission belt according to an embodiment of the present invention will be described. FIG. 1 is a flow chart for explaining steps of a method for printing marks on a transmission belt according to an embodiment of the present invention. A method for printing marks on a transmission belt according to an embodiment of the present invention is configured as a method for printing marks on a transmission belt.

In the mark printing method of the present embodiment, the mark is printed on the power transmission belt, which is a power transmission belt for transmitting power. Configured. The power transmission belt on which the mark is printed may be an annular power transmission belt for power transmission, and examples thereof include V-belts, V-ribbed belts, and frictional power transmission belts such as flat belts. Further, the transmission belt on which the mark is printed is configured as a transmission belt in which the rubber component is vulcanized, and includes, for example, vulcanized rubber and core wires or cores. Further, the power transmission belt on which the mark is printed may include a skin cloth depending on the application.

Further, as the marks printed on the transmission belt, characters, patterns, and the like are printed to indicate information regarding the transmission belt as a product. Examples of items of information relating to the power transmission belt as a product include the manufacturer name, product brand name, logo, country of origin, manufacturing lot number, date of manufacture, belt size, and the like.

The mark printing method of this embodiment shown in FIG. 1 includes a vulcanization step S101, an ink supply step S102, a transfer step S103, and a cooling step S104. Further, the transfer process S103 includes a first transfer process S105, a second transfer process S106, and an ink removal process S107.

Also, the mark printing method of the present embodiment is executed by the mark printing system 100 shown in FIG. FIG. 2 is a cross-sectional view of a mark printing system 100 used in carrying out the mark printing method for the transmission belt C. As shown in FIG. FIG. 3 is a plan view of a mark printing system used in carrying out the mark printing method for the transmission belt. The vulcanization step S101, the ink supply step S102, the transfer step S103, and the cooling step S104 in the mark printing method of the present embodiment are executed by the mark printing system 100 shown in FIGS. A transfer step S105, a second transfer step S106, and an ink removal step S107 are performed.

In this embodiment, the mark printing method of this embodiment is executed by the mark printing system 100. However, this need not be the case. The mark printing method of the present embodiment may be executed based on the work of . In this case, the vulcanization step S101, the ink supply step S102, the transfer step S103, and the cooling step S104 are executed based on the work performed by the operator. And the ink removing step S107 is executed.

In the following description, the mark printing system 100 that executes the mark printing method of the present embodiment will be described first, and then the details of each step of the mark printing method executed by the operation of the mark printing system 100 will be described. will be explained. Note that the mark printing system 100 of this embodiment constitutes a system in which the mark printing method of this embodiment is executed.

[Overview of mark printing system]
The mark printing system 100 is configured as a system that prints a predetermined mark M including a belt size and the like on a transmission belt C, which is a printing target, using a pad 41 as a transfer medium. The mark printing system 100 includes a vulcanizing device 10 , an ink supply device 30 , a transfer device 40 , a cooling device 60 and a control device 70 .

[Vulcanizing equipment]
FIG. 4 is a plan view of vulcanizing device 10 in mark printing system 100 shown in FIG. FIG. 5 is a side view showing the vulcanizing device 10 in the mark printing system 100 shown in FIG. 3, showing the vulcanizing device 10 with the mold 16 open. FIG. 6 is a side view showing the vulcanizing device 10 in the mark printing system 100 shown in FIG. 3, showing the vulcanizing device 10 in a state where the mold 16 is closed. FIG. 7 is a cross-sectional view of the vulcanizing apparatus 10 shown in FIG. 5 taken along line AA. The vulcanization device 10 is a device for vulcanizing a plurality of unvulcanized transmission belts C. As shown in FIG. The vulcanizing device 10 has a pair of pulleys 11 , 11 and a mold 16 . In the following, the power transmission belt C has a vulcanized state and an unvulcanized state, and the vulcanized power transmission belt C is also referred to as a vulcanized power transmission belt C1. Further, the unvulcanized power transmission belt C is configured as an unvulcanized rubber molding, and is also referred to as an unvulcanized rubber molding C2.

A pair of pulleys 11, 11 are provided for circularly moving the unvulcanized rubber molding C2 in the circumferential direction. 1 to 6, a pair of pulleys 11, 11 are configured to hold a plurality of annular unvulcanized rubber molded bodies C2 wound around the unvulcanized rubber molded bodies C2. It is The pair of pulleys 11, 11 are each formed in a substantially columnar shape, and are rotatably provided around the rotation shafts 12, 12 of the pair of pulleys. The pair of pulleys 11, 11 are provided so that the rotation shafts 12, 12 of the pair of pulleys 11, 11 are parallel to each other while being separated from each other by a predetermined distance. The rotation shaft 12 of each of the pair of pulleys 11, 11 is installed so as to extend horizontally. Also, one side of the pair of pulleys 11, 11 is provided so as to be relatively displaceable with respect to the other side. That is, at least one side of the pair of pulleys 11, 11 is movable so that they can be brought close to each other when the unvulcanized rubber molded body C2 is wound thereon or when the vulcanized transmission belt C1 is removed. is provided in

1 to 6, of a pair of pulleys 11, 11, one pulley is a drive pulley 13 and the other pulley is a driven pulley 14. As shown in FIG. The driving pulley 13 rotates about the rotating shaft 12 of the driving pulley 13 when a rotational force is applied by the power of a rotary motor (not shown). The driven pulley 14 is rotatably supported around the rotation shaft 12 of the driven pulley 14, and rotates in the same direction as the driving pulley 13 in synchronization with the rotation of the driving pulley 13 via the unvulcanized rubber molding C2. Rotate.

8 is a cross-sectional view of the vulcanizing apparatus shown in FIG. 5, taken along line BB. A plurality of pulley grooves 15 extending in the circumferential direction are formed in parallel at a predetermined pitch on the outer peripheral surface of each of the pair of pulleys 11 , 11 . A plurality of pulley grooves 15 formed on the outer peripheral surface of each pulley 11 are wound with the inner peripheral side of the unvulcanized rubber molding C2. Each of the plurality of pulley grooves 15 formed in each pulley 11 is formed in a trapezoidal shape with a wider opening side in a cross section perpendicular to the circumferential direction of the pulley 11 . A plurality of unvulcanized rubber moldings C2 wound around the pair of pulleys 11, 11 are arranged in parallel at a predetermined pitch. Therefore, the pair of pulleys 11, 11 can circulate the unvulcanized rubber moldings C2 wound thereon without interfering with each other.

1 to 7, a mold 16 sandwiches and vulcanizes a plurality of annular unvulcanized rubber moldings C2 that are held while being wound around a pair of pulleys 11, 11. It is configured. The mold 16 is provided between the pair of pulleys 11, 11, and is provided so as to be vertically openable and closable with respect to the unvulcanized rubber molding C2 wound around the pair of pulleys 11, 11. As shown in FIG. The mold 16 is configured to sandwich a part of the annularly formed unvulcanized rubber molding C2 between the pair of pulleys 11,11. That is, the mold 16 can partially vulcanize the unvulcanized rubber molding C2 in a part of the circumferential direction. The molds 16 are an inner mold 17 arranged on the inner peripheral side of the unvulcanized rubber molding C2 wound around the pair of pulleys 11, 11, and an outer mold 18 arranged on the outer peripheral side. and have

In the method for printing marks on the transmission belt according to the present embodiment, the inner peripheral die 17 and the outer peripheral die 18 are arranged two above and below the pair of pulleys 11, 11 as shown in FIGS. are set up. Each of the inner peripheral mold 17 and the outer peripheral mold 18 sandwiches an annular unvulcanized rubber molding C2 wound around a pair of horizontally installed pulleys 11, 11 from above and below. is configured to

5 to 7, the inner peripheral mold 17 is arranged parallel to the inner peripheral side of the unvulcanized rubber molding C2 wound around the pair of pulleys 11, 11. . The inner peripheral die 17 is formed in a block shape and extends from one pulley 11 side to the other pulley 11 side. As shown in FIG. 7, the inner peripheral mold 17 is a mold in which the inner peripheral side of the unvulcanized rubber molded body C2 is fitted on the surface facing the inner peripheral side of the unvulcanized rubber molded body C2. A groove 19 is formed. A plurality of mold grooves 19 are formed so as to extend from one pulley 11 side to the other pulley 11 side. The mold groove 19 has a cross section perpendicular to the circumferential direction of the unvulcanized rubber molded body C2 in the state of being installed in the inner peripheral mold 17, that is, a cross section perpendicular to the direction in which the groove extends. , is formed in a trapezoidal shape with a wider opening side.

5 to 7, the outer peripheral mold 18 is arranged parallel to the outer peripheral side of the unvulcanized rubber molding C2 wound around the pair of pulleys 11, 11. As shown in FIG. The outer peripheral mold 18 is formed in a block shape and extends from one pulley 11 side to the other pulley 11 side. The outer peripheral mold 18 has a flat surface facing the outer peripheral side of the unvulcanized rubber molding C2.

The inner peripheral mold 17 is provided with a heat source section 20 that serves as a heat source for vulcanizing the unvulcanized rubber molding C2. The heat source part 20 of the mold 16 used in the method for printing marks on the transmission belt according to this embodiment is provided in the inner peripheral mold 17 arranged between the pair of pulleys 11 , 11 . The heat source section 20 may be provided on the outer peripheral mold 18 or may be provided on both the inner peripheral mold 17 and the outer peripheral mold 18 . In the vulcanizing device 10, a plurality of unvulcanized rubber moldings C2 wound around a pair of pulleys 11, 11 are circulated in conjunction with the opening and closing operation of the mold 16 based on a control command from the control device 70. controlled to By repeating the above procedure, the unvulcanized rubber molding C2 is vulcanized over the entire circumference. Accordingly, the transmission belt C1 after vulcanization is formed by completing the vulcanization of the unvulcanized rubber molding C2.

[Ink supply device]
2 and 3, the ink supply device 30 is a device for forming marks to be printed on the transmission belt C1 filled with ink and vulcanized. The ink supply device 30 has an ink holding section 31 and a mark forming section 32 .

FIG. 9 is a schematic diagram for explaining the ink holding section 31 and the mark forming section 32 of the ink supply device 30 used in the method for printing marks on the transmission belt. The ink holding portion 31 is configured as a portion that supplies ink to a mark forming portion 32 that forms marks M printed on the transmission belt C. As shown in FIG. The ink holding portion 31 includes a sponge unit 31a and a pressing portion 31b. The sponge unit 31 a holds ink to be supplied to the mark forming section 32 . In the sponge unit 31a, ink is absorbed from an ink tank (not shown) through an ink supply path (not shown). The sponge unit 31a is configured such that the absorbed ink oozes out from the sponge unit 31a to the mark forming portion 32 when pressed by the pressing portion 31b. That is, the pressing portion 31b presses the sponge unit 31a holding the ink from below to supply the mark forming portion 32 with a predetermined amount of ink. A plurality of ink supply devices 30 may be used simultaneously, and in this case, inks of the same color or different colors may be used in each ink supply device 30 . In the ink holding portion 31 , ink is supplied to the mark forming portion 32 by the pressing portion 31 b based on the control command from the control device 70 .

A mark M for printing on the vulcanized power transmission belt C<b>1 is formed in the mark forming portion 32 via the pad 41 . The mark forming portion 32 is made of a synthetic resin material having numerous holes. When the pressing portion 31b is pressed in the direction indicated by the solid-line arrow in FIG. 9, the mark-forming portion 32 sees ink from the sponge unit 31a holding the ink, as indicated by the dashed-line arrow, due to capillary action. Directionally supplied. In the ink supply device 30 , the mark M is formed on the mark forming section 32 in conjunction with the movement of the pad 41 of the transfer device 40 based on the control command from the control device 70 .

[Transfer device]
Referring to FIGS. 2 and 3, the transfer device 40 is configured as a device for transferring the marks M formed in the mark forming portion 32 onto the vulcanized transmission belt C1 wound around the pair of pulleys 11, 11. It is The transfer device 40 has a pad 41 and a pad driver 42 . The transfer device 40 is arranged adjacent to the vulcanization device 10 and the ink supply device 30 . Note that the pad drive unit 42 is shown in a partially omitted form in FIG.

The pad 41 serves as a transfer medium to which the mark M formed in the mark forming portion 32 is transferred in the first transfer step S105 of the transfer step S103. Further, the pad 41 is a portion that is pressed against the vulcanized transmission belt C1 in the second transfer step S106 of the transfer step S103, and is a portion that prints the mark M on the vulcanized transmission belt C1. The pad 41 is formed in a columnar shape from a silicon material. The pad 41 has a columnar main body portion 43 formed in a columnar shape at least in part.

In the first transfer step S105 of the transfer step S103, the columnar main body portion 43 rotates while being pressed against the mark forming portion 32 of the ink supply device 30, thereby transferring the marks M thereon. Further, in the second transfer step S106 of the transfer step S103, the columnar main body portion 43 is pressed against the vulcanized transmission belt C1, and rotates as the transmission belt C rotates. , the mark M is transferred to the transmission belt C.

2 and 3, the pad 41 has a pad rotating shaft 44 and is rotatably supported with respect to the pad driving section 42. As shown in FIG. The pad rotating shaft 44 is arranged so as to extend parallel to the rotating shafts 12, 12 of the pair of pulleys. That is, the columnar body portion 43 extends parallel to the rotation shafts 12, 12 of the pair of pulleys 11, 11 and is rotatably supported. Also, the pad 41 is provided movably by the pad driving section 42 between the mark forming section 32 of the ink supply device 30 and the transmission belt C wound around the pair of pulleys 11 , 11 .

The pad driving section 42 is a section for moving the pad 41 horizontally and vertically. The pad drive unit 42 movably holds the pad 41 and transfers the mark M transferred to the pad 41 to the vulcanized transmission belt C1 held by the pair of pulleys 11 , 11 . The pad drive portions 42 are provided at both ends of the pad rotating shaft 44 of the pad 41 . The pad driving section 42 has a driving mechanism (not shown) for moving the pad 41 and a guide section 45 for guiding the driving of the pad 41 . The drive mechanism is configured using, for example, a cylinder unit, a linear motor mechanism, and a ball screw mechanism, and drives the pad 41 vertically and horizontally. Also, the pad 41 is supported by the guide portion 45 so as to be rotatable around the pad rotating shaft 44 . The transfer device 40 drives the pad 41 by the driving mechanism based on the control command from the control device 70 .

[Ink removal device]
FIG. 10 is a diagram for explaining an ink removing device used in a method of printing marks on a transmission belt. The ink removing device 50 used in the mark printing method for the transmission belt according to the present embodiment is impregnated in the pad 41 when, for example, the mark M transferred to the vulcanized transmission belt C1 is switched to another mark M. It is configured as a device that absorbs and removes ink that is present. The ink removing device 50 includes an ink removing sheet 51 , an ink removing table 52 , and an ink removing sheet supply mechanism 53 .

The ink removal sheet 51 is configured as a sheet material that absorbs and retains ink, and is configured as impregnated paper, for example. When the mark M transferred to the transmission belt C1 after vulcanization is switched, the ink impregnated in the pad 41 is pressed against the ink removing sheet 51 made of impregnated paper while the pad 41 is rotating. It is absorbed by the removal sheet 51 and removed from the pad 41 . When the ink on the ink removing sheet 51 is absorbed by the pad 41, the pad 41 is rotated on the ink removing sheet 51 while being pressed to absorb the ink. As another method for absorbing the ink into the ink removing sheet 51, the pad 41 may be moved and rotated along the ink removing sheet 51 while the ink removing sheet 51 is held on the ink removing table 52. .

The ink removal table 52 has a planar upper surface so that the ink removal sheet 51 can be placed in a flat state, and is configured to support the ink removal sheet 51 in a flat state. Therefore, when rotating while pressing the pad 41 against the ink removing sheet 51 placed on the ink removing table 52, the pad 41 is pressed against the ink removing sheet 51 in a state of being firmly attached. The operation of rotating the pad 41 while pressing it against the ink removing sheet 51 placed on the ink removing table 52 is performed by driving the pad 41 with the pad driving section 42 of the transfer device 40 .

The ink removing sheet supply mechanism 53 holds, for example, the ink removing sheet 51 wound in a roll shape, pays out the ink removing sheet 51, supplies the ink removing sheet 51 onto the ink removing table 52, and absorbs the ink. It is configured as a mechanism for winding the ink removal sheet 51 . The ink removal sheet supply mechanism 53 operates based on a control command from the control device 70, and supplies and winds up the ink removal sheet 51 on the ink removal table 52 with the pad 41 pressed against the ink removal sheet 51. . As a result, the ink removal sheet 51 placed on the ink removal table 52 is maintained in a state in which it can absorb the ink on the pad 41 . In this embodiment, the ink removing device 50 including the ink removing sheet supply mechanism 53 is illustrated, but the present invention is not limited to the one having the ink removing sheet supply mechanism 53 . For example, the ink removal sheet 51 may simply be placed on the ink removal table 52 .

[Cooling system]
2 and 3, the transmission belt mark printing method system 100 according to the present embodiment includes a cooling device 60 for applying cooling water W as a cooling medium to the vulcanized transmission belt C1. The cooling device 60 is a device for cooling the vulcanized transmission belt C1 onto which the marks M have been transferred in the second transfer step S106. The cooling device 60 is provided with a discharge port 61 through which the cooling water W is discharged. 2 and 3, the cooling water W discharged from the discharge port 61 is schematically illustrated by broken lines. The cooling device 60 is arranged above between the mold 16 and the pulley 11 so that the cooling water W is applied to the outer peripheral side of the vulcanized transmission belt C1 positioned between the mold 16 and the pulley 11. is provided. The transmission belt C1 after vulcanization is circulated by the pair of pulleys 11, 11 and cooled by the cooling medium between the mold 16 and the pulley 11. As shown in FIG. Based on a control command from the control device 70 , the cooling device 60 discharges the cooling water W from the discharge port 61 in conjunction with the movement of the vulcanization device 10 .

[Control device]
2 and 3, the control device 70 is provided as a device for controlling the operations of the vulcanizing device 10, the ink supply device 30, the transfer device 40, and the cooling device 60 in the mark printing system 100. . As described above, the vulcanizing device 10 , the ink supply device 30 , the transfer device 40 and the cooling device 60 operate based on control commands from the control device 70 .

The control device 70 includes a processor such as a CPU, a memory, an operation unit such as an operation panel or operation panel operated by a user, an interface circuit, and the like. The memory of the control device 70 stores a program for creating control commands for controlling the operations of the vulcanizing device 10 , the ink supply device 30 , the transfer device 40 , the ink removal device 50 and the cooling device 60 . As the user operates the operation unit, the above program is read from the memory and executed by the processor. As a result, the above control command is generated, and the vulcanizing device 10, the ink supply device 30, the transfer device 40, the ink removing device 50, and the cooling device 60 operate based on the control command.

[Each step of the mark printing method]
The mark printing method of this embodiment is executed by operating the mark printing system 100 described above. That is, the mark printing system 100 executes the vulcanization step S101, the ink supply step S102, the transfer step S103, and the cooling step S104 in the mark printing method of the present embodiment. A transfer step S106 and an ink removal step S107 are performed. Each step of the mark printing method of the present embodiment executed by the operation of the mark printing system 100 will be described in more detail below.

[Vulcanization process]
In the vulcanization step S101, a plurality of unvulcanized annular transmission belts C2 held in a state of being wound around the pair of pulleys 11, 11 are placed between the pair of pulleys 11, 11 to form an unvulcanized transmission belt C2. It is a step of vulcanization by a mold 16 configured to sandwich the .

Prior to vulcanization, the unvulcanized rubber molding C2 is wound around a pair of pulleys 11, 11 as shown in FIG. In the power transmission belt mark printing method according to the present embodiment, as shown in FIG. It is wrapped so that a part of the circumferential direction in the is fitted. At this time, the mold 16 provided between the pair of pulleys 11, 11 is held open based on the control command from the control device 70. As shown in FIG. Then, as shown in FIG. 6, the unvulcanized rubber molding C2 is wound around a pair of pulleys 11, 11, sandwiched between the molds 16 heated by the heat source 20, and vulcanized. That is, the unvulcanized rubber molding C2 is fitted in the inner peripheral side mold 17 while being wound around the pair of pulleys 11, 11, and is clamped by the outer peripheral side mold 18 from the outer peripheral side to be cured. Sulfurized. At this time, the vulcanization of the unvulcanized rubber molding C2 is performed only at the clamped portion. Then, the unvulcanized rubber molding C2 partially vulcanized is released from the clamping while being held by the pair of pulleys 11,11.

In addition, in the vulcanization step S101, the mold 16, which is composed of the inner peripheral mold 17 arranged on the inner peripheral side of the transmission belt C and the outer peripheral mold 18 arranged on the outer peripheral side, is interlocked with the opening and closing of the mold 16. Secondly, a plurality of transmission belts wound around the pair of pulleys 11, 11 are circulated. Specifically, the partially vulcanized unvulcanized rubber molding C2 is wound around the pair of pulleys 11, 11 by the driving pulley 13 based on the control command from the control device 70. It is circularly moved by a predetermined distance. Then, the transmission belt C moved relative to the mold 16 by being circularly moved by the pair of pulleys 11, 11 is re-vulcanized with the unvulcanized portion sandwiched by the mold 16. . At this time, the transmission belt C vulcanized by the mold 16 may include a part of the vulcanized portion and be sandwiched between the molds 16 to be vulcanized again. Then, the pair of pulleys 11, 11 and the mold 16 repeat the above-described operations to vulcanize the entire unvulcanized rubber molding C2 to form the vulcanized power transmission belt C1.

[Ink supply process]
After the vulcanization step S101 is performed, an ink supply step S102 is performed to form the marks M in the mark forming section 32 in order to print the marks M on the vulcanized power transmission belt C1. The ink supply step S102 is configured as a step of filling and supplying ink to the mark forming portion 32 that forms the marks M to be transferred onto the transmission belt C. As shown in FIG. The ink supply step S<b>102 is executed by supplying ink to the mark forming section 32 in the ink supply device 30 based on a control command from the control device 70 .

FIG. 11 is a diagram for explaining the mark forming unit 32 used in the method of printing marks on the transmission belt. In the ink supply step S<b>102 , the pressing section 31 b presses the sponge unit 31 a holding ink based on a command from the control device 70 to supply ink to the mark forming section 32 . Then, when ink is supplied to the mark forming portion 32 having a region where marks M are formed, a plurality of marks M are formed. In FIG. 11, the ranges of the plurality of marks M formed in the mark forming section 32 are indicated by two-dot chain lines, and the ranges of the regions S in which the marks M are formed are indicated by dashed lines.

As shown in FIG. 11, the mark forming portion 32 has a region S in which marks M are formed. A plurality of marks M1 as a plurality of marks M to be transferred onto the plurality of transmission belts C are formed in the region S of the mark forming portion 32 .

In FIG. 11, the mark M1 formed in the area S is displayed as a mark M displaying, for example, the name of the manufacturer and the name of the product brand. In the mark M1, the manufacturing company name (the part made up of three star patterns) and the product brand name (the part made up of the characters "B-60") are both composed of the same pattern and characters. ) is displayed. In addition, the country of manufacture is displayed in the mark M2 formed in the area S.

The mark forming section 32 is configured so that a plurality of marks M1 and M2 are formed in the region S, as shown in FIG. In this embodiment, a mode in which five marks M1 and M2 are formed in each region S is exemplified.

[Transfer process]
The transfer step S103 is a step in which the mark M is transferred by the pad 41 onto the vulcanized transmission belt C1. The transfer step S103 includes a first transfer step S105, a second transfer step S106, and an ink removal step S107. The first transfer step S105, the second transfer step S106, and the ink removal step S107 are performed by operating the vulcanizing device 10, the transfer device 40, and the ink removal device 50 based on a control command from the control device 70. executed.

FIG. 12 is a diagram showing an example for explaining the operation of mark printing by the mark printing system 100 for the transmission belt, and is a diagram schematically showing a state in which the marks M are transferred to the transfer medium. The first transfer step S105 is a step in which the marks M printed on the vulcanized transmission belt C1 are transferred from the ink supply device 30 filled with ink to the pad 41 as a transfer medium. Specifically, in the first transfer step S105, the pad 41 is pressed onto the mark forming section 32 filled with ink by driving the drive mechanism of the transfer device 40, and moves on the mark forming section 32 so as to rotate. It is done by being done. In the first transfer step S<b>105 , a plurality of marks M are transferred to the pad 41 when the pad 41 rotates while being pressed against the mark forming section 32 . When a plurality of ink supply devices 30 are used simultaneously in the mark printing system 100 for the transmission belt, in the first transfer step S105, the pad 41 is pressed.

When the pad 41 is pressed against the mark forming portion 32 in the first transfer step S105, first, part of the peripheral surface of the columnar body portion 43 of the pad 41 is pressed against a partial region of the mark forming portion 32. . Then, the pad driving unit 42 drives the pad 41 to move in the horizontal direction. At this time, the pad 41 rotates while being pressed against the mark forming portion 32 and moves on the area S of the mark forming portion 32 to transfer the mark M to the pad 41 . That is, in the first transfer step S105, each of the marks M1 and M2 formed on the mark forming portion 32 is transferred by the pad 41 rotating once.

After the mark M is transferred to the pad 41 , the pad 41 is moved from the ink supply device 30 to the vulcanization device 10 . Movement of the pad 41 from the ink supply device 30 to the vulcanization device 10 is performed by a drive mechanism provided in the pad drive section 42 . The pad 41 on which the marks M have been transferred by the first transfer step S105 is first moved upward away from the ink supply device 30 and moved above the transmission belt C wound around the pair of pulleys 11, 11. move to Then, the pad 41 descends toward and comes into contact with the vulcanized transmission belt C1 wound around the pair of pulleys. As a result, the columnar main body portion 43 of the pad 41 is pressed against the outer peripheral surface of the plurality of post-vulcanization transmission belts C1 wound around the pair of pulleys 11 , 11 .

FIG. 13 is a view for explaining an example of mark printing operation by the mark printing system 100 for the power transmission belt, and is a view schematically showing a state in which the mark M is transferred to the power transmission belt C1 after vulcanization. is. The second transfer step S106 is performed following the first transfer step S105. In the second transfer step S106, the pad 41 to which the mark M has been transferred in the first transfer step S105 is pressed against the transmission belt C held by the pair of pulleys 11, 11 in a vulcanized state, thereby transferring the mark M. is transferred to the transmission belt C. Specifically, in the second transfer step S106, in the transfer device 40, the pad driving section 42 presses the pad 41 as the transfer medium against the vulcanized transmission belt C1 wound around the pair of pulleys 11, 11. It is executed by driving

In the second transfer step S106, the columnar body portion 43 of the pad 41 is pressed against the transmission belt C between the mold 16 and the pulley 11 and rotates along with the circular movement of the transmission belt C. Transfer the mark M. In the second transfer step S106, a plurality of marks M are transferred to the vulcanized transmission belt C1 when the pad 41 rotates while being pressed against the vulcanized transmission belt C1. Then, the mark M is transferred to the transmission belt C1 after vulcanization. The second transfer step S106 is executed by operating the vulcanizing device 10 and the transfer device 40 based on a control command from the control device 70 .

In the second transfer step S106, when the pad 41 is pressed against the transmission belt C wound around the pair of pulleys 11, 11, the pad 41 is first placed between the mold 16 and the pulley 11, A pad 41 is pressed against a partial area on the outer peripheral side of the transmission belt C1 after vulcanization. In this state, the vulcanized transmission belt C1 is rotated by the pair of pulleys 11, 11, and the mark M is transferred.

In the second transfer step S106, as shown in FIG. 13, the pads 41 to which the plurality of marks M1 and M2 have been transferred in the region S of the mark forming portion 32 in the first transfer step S105 are transferred to the plurality of vulcanized transmission belts. Since it rotates while being pressed against C1, it is transferred.

[Ink removal process]
The ink removing step S107 is a step of removing the mark M from the pad 41. When the mark M transferred to the unvulcanized rubber molding C2 is switched, the ink impregnated in the pad 41 is absorbed. It is configured as a step of removing. The ink removing step S<b>107 is executed by operating the transfer device 40 and the ink removing device 50 based on a control command from the control device 70 .

In the ink removing step S<b>107 , first, in the ink removing device 50 , the portion of the ink removing sheet 51 where the ink has not been absorbed is supplied onto the ink removing table 52 . In this state, the pad 41 of the transfer device 40 is pressed against the ink removing sheet 51 placed on the ink removing table 52 . Next, while the pad 41 is still pressed against the ink removal sheet 51, the ink removal sheet supply mechanism 53 operates to supply the ink removal sheet onto the ink removal sheet 52 and wind it up. At this time, in the ink removing device 50 , the portion of the ink removing sheet 51 that has not absorbed ink is supplied onto the ink removing table 52 , and the portion of the ink removing sheet 50 that has absorbed ink is transferred to the ink removing sheet supply mechanism 53 . be wound up. On the other hand, the pad 41 pressed against the ink removing sheet 51 rotates and the ink is absorbed by the ink removing sheet 51 .

As described above, in the transfer step S103, the first transfer step S105, the second transfer step S106, and the ink removal step S107 are repeated as appropriate, thereby forming a plurality of types of marks on the vulcanized transmission belt C1. M is printed. Note that the marks M printed in the transfer step S103 are dried quickly without a separate drying step because the heat applied in the vulcanization step S101 accelerates drying.

[Cooling process]
When the mark printing method using the mark printing system 100 is carried out, the cooling step S104 is performed by the cooling device 60 after the mark M is transferred to the vulcanized transmission belt C1 by the pad 41 . The cooling step S104 is a step of cooling the vulcanized transmission belt C1 onto which the marks M have been transferred in the second transfer step S106. In the cooling step S104, after the ink of the marks M transferred to the vulcanized transmission belt C1 is dried, the vulcanized transmission belt C1 is cooled together with the transferred marks M. In the cooling step S104, while the vulcanized transmission belt C1 to which the mark M has been transferred is rotated by the pair of pulleys 11, cooling water W as a cooling medium is passed between the mold 16 and the pulley 11. Cool by

The transmission belt C1 after vulcanization cooled by the cooling water W is moved so that the pulley 11 on one side of the pair of pulleys 11, 11 approaches the pulley 11 on the other side. Removed. When the cooling step S104 ends, the printing of the marks M on the transmission belt C ends, and the mark printing method of this embodiment ends.

[Actions and effects of the present embodiment]
According to the transmission belt mark printing method of the present embodiment, the mark M transferred to the pad 41 in the first transfer step S105 is applied to the vulcanized transmission belt C held by the pair of pulleys 11, 11. is transcribed. That is, according to the mark printing method for the transmission belt, in the mark printing on the transmission belt C, the mark M is printed on a base material made of a film, the base material is superimposed on the rubber belt in an unvulcanized state, and the base material is By vulcanizing the rubber belt in which the materials are piled up, the conventional process of transferring the mark M to the transmission belt C by heat welding at the time of vulcanization becomes unnecessary. Therefore, according to the mark printing method for the transmission belt, the conventional work requiring a lot of work time, such as arranging a large number of substrates on which the mark M is printed on a narrow rubber belt, is not required, and the work time can be shortened. . Further, as described above, since the mark M can be transferred to the transmission belt C while it is held by the pair of pulleys 11 after vulcanization, the working time can be shortened. When the marks M are transferred to the transmission belt C, it is conceivable that the transmission belt C is removed from the mold 16, conveyed to a place where the transfer is performed, and the marks M are transferred to the conveyed transmission belt C. In this case, it is necessary to remove the transmission belt C from the mold 16, convey it to a transfer location, and align it. However, according to the above mark printing method for the transmission belt C, it is not necessary to remove the transmission belt C, convey it to a transfer location, and align it. Therefore, it is possible to further shorten the working time for printing marks on the transmission belt C. FIG.

Further, according to the method for printing marks on the transmission belt of the present embodiment, in the first transfer step S105, the mark M printed on the transmission belt C is transferred to the pad 41 as the transfer medium, and then the mark M is transferred to the pad 41 as the transfer medium in the second transfer step S106. , the mark M transferred to the pad 41 in the first transfer step S105 is transferred to the vulcanized transmission belt C1. That is, the mark M is transferred using the pad 41 as a transfer medium for transferring the mark M. FIG. Therefore, according to the above-described mark printing method for the transmission belt, there is no need to print the mark M using a base material as in the conventional art, and the pad 41 is used as a transfer medium to transmit the mark M transferred to the pad 41. The mark M can be printed on the transmission belt C only by pressing it against the belt C. - 特許庁As a result, the marks M can be continuously and easily printed on the transmission belt C, and the working time for printing can be shortened.

Further, according to the method of printing marks on the transmission belt of the present embodiment, since it is not necessary to arrange the base material composed of the film on the transmission belt C, when arranging the base material on the transmission belt C, the arrangement direction or the arrangement position There is no work mistake such as mistakenly. In addition, since the base material is not used in the first place, there is no problem in displaying the mark on the transmission belt C when the film as the base material is wrinkled, bent, or distorted.

Furthermore, according to the mark printing method for the transmission belt of the present embodiment, since the film as the base material is not used, the work time for peeling the film from the vulcanized transmission belt C1 is not necessary, and the work time for printing is eliminated. can be shortened.

Therefore, according to this embodiment, it is possible to provide a method for printing marks on the transmission belt, which can shorten the work time for printing marks on the transmission belt C. FIG.

Further, according to the mark printing method for the transmission belt C of the present embodiment, in addition to the vulcanization step S101, the first transfer step S105, and the second transfer step S106, the cooling step S104 is performed on the transmission belt to which the mark M has been transferred. C. That is, the second transfer step S106 in which the marks M are transferred to the transmission belt C is performed before the vulcanized transmission belt C1 is cooled. For this reason, the marks M are transferred to the transmission belt C which is still hot after vulcanization, and the drying of the marks M is accelerated. That is, the heat applied to the transmission belt C during vulcanization can be effectively used, and the marks M transferred to the transmission belt C can be dried in a short time. Furthermore, when the marks M are printed after the vulcanized power transmission belt C1 is cooled, a separate drying step for the marks M is required, but such a step is not required.

Further, according to the method of printing marks on the transmission belt of the present embodiment, the movement of the unvulcanized portion of the transmission belt C is linked to the opening and closing of the molds 16 arranged on the inner and outer peripheral sides of the transmission belt C. of pulleys 11, 11. Therefore, when vulcanizing the power transmission belt C, while moving the unvulcanized portion of the power transmission belt C wound around the pair of pulleys 11, 11, the inner peripheral side disposed on the inner peripheral side of the power transmission belt C is moved. The entire transmission belt C can be continuously and efficiently vulcanized by the mold 17 and the outer mold 18 arranged on the outer peripheral side. After the transmission belt C is vulcanized, the mold 16 is opened, and the marks M can be efficiently transferred to the entire circumference of the transmission belt C while the transmission belt C is rotated by the pair of pulleys 11 , 11 . As a result, it is possible to further shorten the working time for printing marks on the transmission belt.

Further, according to the method of printing marks on the transmission belt of the present embodiment, the cooling step S104 is performed by bringing the cooling medium into contact with the transmission belt C that is circulated by the pair of pulleys 11 , 11 . Furthermore, cooling of the transmission belt can be performed between the mold 16 and the pulley 11 . Therefore, the cooling step S104 can be performed as it is without the need to transport the transmission belt C from the place where the vulcanization step S101 and the second transfer step S106 have been performed. That is, the transmission belt C can be efficiently and easily cooled after the marks are printed on the transmission belt C. FIG.

Further, according to the method of printing marks on the transmission belt of the present embodiment, the pad 41 is transferred with the mark M from the ink supply device 30 in the first transfer step S105, and the rotating shafts 12, 12 of the pair of pulleys 11, 11 are transferred to the pad 41. It has a columnar body portion 43 rotatably provided around a pad rotation shaft 44 extending parallel to the pad. Then, the pad 41 provided with the cylindrical body portion 43 is pressed against the transmission belt C between the mold 16 and the pulley 11 in the second transfer step S106. Therefore, in the second transfer step S106, the mark M is transferred to the transmission belt C without the pad 41 interfering with the mold 16 and the pulley 11. FIG. Further, when the pad 41 having the columnar body portion 43 onto which the mark M is transferred in the first transfer step S105 transfers the mark M to the transmission belt C in the second transfer step S106, the columnar body portion 43 is transferred to the transmission belt. It is pressed against C and rotates in conjunction with the circular movement of the transmission belt C. Therefore, the mark M transferred to the columnar main body 43 can be transferred by rotating the pad 41 with respect to the transmission belt C wound around the pair of pulleys 11 , 11 . As a result, even if the marks M are arranged in the circumferential direction of the annular transmission belt C, they can be easily transferred.

According to the transmission belt mark printing system 100 of the present embodiment, the mark M transferred to the pad 41 is transferred to the vulcanized transmission belt C1 held by the pair of pulleys 11 , 11 . That is, in the mark printing system 100 for the transmission belt described above, the conventional process of transferring the mark M to the transmission belt C using the film base material is completely unnecessary. Therefore, according to the transmission belt mark printing system 100, the conventional work of arranging a large number of substrates on which the marks M are printed on a narrow rubber belt, which requires a lot of work, becomes unnecessary, and the work time is shortened. be able to. Further, since the marks M can be transferred to the transmission belt C while being held by the pair of pulleys 11 after vulcanization, the working time can be shortened. When the marks M are transferred to the transmission belt C, it is conceivable that the transmission belt C is removed from the mold 16, conveyed, and the marks M are transferred to the conveyed transmission belt C. FIG. In this case, it is necessary to remove the transmission belt C from the mold 16, convey it to a transfer location, and align it. However, according to the transmission belt mark printing system 100, it is not necessary to remove the transmission belt C, convey it to a transfer location, and align it. Therefore, it is possible to further shorten the working time for printing marks on the transmission belt C. FIG.

Further, according to the transmission belt mark printing system 100 of the present embodiment, the mark M is transferred to the vulcanized transmission belt C by the pad 41 and the pad driving section 42 that drives the pad 41 . That is, the pad 41 is moved by the driving force of the pad driving section 42, the mark M formed in the mark forming section 32 is transferred to the pad 41, and is held by the pair of pulleys 11, 11 in a vulcanized state. The mark M transferred to the pad 41 is transferred to the transmission belt C which is turned on. For this reason, according to the mark printing system 100 for the transmission belt described above, it is not necessary to print the mark M using a base material as in the conventional art, and the pad 41 is used as a transfer medium and is driven by the pad driving section 42, and the pad The mark M can be printed on the transmission belt C only by pressing the mark M transferred to the transmission belt C onto the transmission belt C. As a result, the marks M can be continuously and easily printed on the transmission belt C, and the working time for printing can be shortened.

In addition, according to the transmission belt mark printing system 100 of the present embodiment, since it is not necessary to arrange the base material composed of the film on the transmission belt C, when arranging the base material on the transmission belt C There is no need to make a mistake in the work such as mistaking the place. In addition, since the base material is not used in the first place, there is no problem in displaying the mark on the transmission belt C when the film as the base material is wrinkled, bent, or distorted.

Furthermore, according to the transmission belt mark printing system 100 of the present embodiment, since the film as the base material is not used, the work time required for peeling off the film from the vulcanized transmission belt C1 is not necessary, and the work at the time of printing is eliminated. can save time.

Therefore, according to the mark printing system 100 for the transmission belt C, the mark printing system 100 for the transmission belt C can be provided, which can shorten the work time for printing the mark on the transmission belt C.

Further, according to the mark printing system 100 for the power transmission belt of the present embodiment, the pad 41 is provided in a cylindrical shape rotatably around the pad rotation shaft 44 extending parallel to the rotation shafts 12, 12 of the pair of pulleys 11, 11. It has a body portion 43 . Then, the mark M is transferred from the mark forming portion 32 to the columnar body portion 43 . Therefore, the mark M to be transferred to the columnar body portion 43 can be transferred by rotating the pad 41 while pressing it against the transmission belt C wound around the pair of pulleys 11 , 11 . As a result, even if the marks M are arranged in the circumferential direction of the annular transmission belt C, they can be easily transferred.

[Modification]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be implemented with various modifications within the scope of the claims. For example, the following modifications may be implemented.

(1) In the above-described embodiment, the pair of pulleys 11, 11 circulates and the mold 16 opens and closes repeatedly to vulcanize the entire unvulcanized rubber molded body C2. Although the case where the transmission belt C1 is molded and the mark M is transferred to the vulcanized transmission belt C1 has been described as an example, this does not have to be the case. For example, the transfer of the mark M to the transmission belt C is performed in conjunction with the circular movement of the pair of pulleys 11, 11 each time a part of the unvulcanized rubber molding C2 is vulcanized. good too. In this case, the transfer of the marks M to the transmission belt C is performed in a plurality of times in conjunction with the circular movement of the transmission belt C by the pair of pulleys 11 , 11 .

(2) In the above-described embodiment, cooling water W is used as a cooling medium when cooling the vulcanized transmission belt C1 on which the marks M are printed, but this need not be the case. For example, air may be blown as a cooling medium for cooling the vulcanized transmission belt C1 on which the marks M are printed. Alternatively, the vulcanized power transmission belt C1 on which the mark M is printed may be placed at room temperature in a windless place, and allowed to cool by natural cooling.

(3) In the above-described embodiment, the pad 41 as the transfer medium has a columnar body portion 43 formed in a columnar shape, but this need not be the case. For example, the pad 41 as a transfer medium has a flat surface that contacts the mark forming portion 32 and the transmission belt C to be printed, and the mark M can be transferred to the transmission belt C simply by a pressing operation. may be

[Example]
An example in which marks Q are printed on the vulcanized power transmission belt C1 by the mark printing system 100 according to the embodiment of the present invention will be described below. Further, in the examples, the printed finished state of the power transmission belt C1 was evaluated.

FIG. 14 is a table for explaining the transfer step S103 for printing the mark Q on the transmission belt C1 in the embodiment. In the evaluation of the finished state of printing of the marks Q on the transmission belt C1, a B-shaped wrapped V-belt, which is one of the types defined by JIS, was used as a printing object. Specifically, a transmission belt C1 having dimensions of 3048.0 mm in length, 11.0 mm in thickness, and 16.5 mm in depth was used as an object to be printed. The length of the transmission belt C1 is the length of the annular transmission belt C1 in the circumferential direction. The thickness dimension of the power transmission belt C1 is the dimension in the direction from the inner peripheral side to the outer peripheral side of the power transmission belt C1 and from the outer peripheral side to the inner peripheral side. The depth dimension of the power transmission belt C1 is the dimension in the direction parallel to the axial direction of the annular power transmission belt C1 in a state of being hung on the pair of pulleys 11,11.

In the production of the power transmission belt C1 according to the embodiment, as marks printed on the power transmission belt C1, there are, for example, marks indicating six types of product information including the product brand name, country of origin, specifications, product standards, and the like. Q (Q1, Q2, Q3, Q4, Q5, Q6) were used. Although white or red was used as the color of each mark Q1, Q2, Q3, Q4, Q5, and Q6, the same color was used for each of the six types of marks Q1, Q2, Q3, Q4, Q5, and Q6. Alternatively, all six different colors may be used.

In the production of the power transmission belt C1 according to the example, after printing was performed on 15 power transmission belts C1 that were held in a vulcanized state and wound around a pair of pulleys 11, 11, Next, the procedure of printing on another 15 unprinted vulcanized transmission belts C1 was repeated eight times in total. In other words, the total number of transmission belts C1 on which all the marks Q1, Q2, Q3, Q4, Q5 and Q6 have been transferred is 120 pieces. The marks Q1, Q2, Q3, Q4, Q5, and Q6 are printed on the transmission belt C1 by dividing the transfer operation of the marks Q1, Q2, and Q3 into the transfer operation of the marks Q4, Q5, and Q6. 41 was performed for 15 transmission belts C1.

Further, the transmission belt C1 according to the example was produced in the transfer step S103, which is a combination of the first transfer step S105, the second transfer step S106, and the ink removal step S107. Prior to the transfer step S103, trial printing was performed to confirm the state of transfer of the marks Q1, Q2, Q3, Q4, Q5, and Q6 to the pad 41. FIG. In test printing, marks Q1, Q2, Q3, Q4, Q5, and Q6 formed in the mark forming section 32 of the ink supply device 30 are transferred to the pad 41, and then the marks Q1, Q2, This was done by pressing Q3, Q4, Q5 and Q6 against the ink removing sheet 51. FIG. The printed states of the marks Q1, Q2, Q3, Q4, Q5, and Q6 transferred by being pressed against the ink removing sheet 51 were visually checked. The specific transfer step S103 will be described below.

The upper part of FIG. 14 shows, for example, the transfer step S103 of printing three marks Q1, Q2 and Q3 out of the six marks Q1 to Q6 on the transmission belt C1. The printed mark Q1 is a white mark indicating the product brand name of the power transmission belt C1, the printed mark Q2 is a white mark indicating the specifications of the power transmission belt C1, and the printed mark Q3 is the product of the power transmission belt C1. It is a white mark that indicates the standard. In the transfer step S103 of the marks Q1, Q2, and Q3, the marks Q1, Q2, and Q3 formed in the mark forming portion 32 of the ink supply device 30 are transferred to the pad 41 as the first transfer step S105, and then transferred to the second transfer step S103. In S106, the marks Q1, Q2, Q3 transferred to the pad 41 are transferred to a plurality of transmission belts C1 that are held while being wound around the pair of pulleys 11, 11. FIG. In the second transfer step S106, the marks Q1, Q2, and Q3 were transferred to the 15 transmission belts C1 for each transfer operation. After the marks Q1, Q2 and Q3 were transferred to the transmission belt C1 in the second transfer step S106, the pad 41 was pressed against the ink removing sheet 51 to perform the ink removing step S107.

The lower part of FIG. 14 shows, for example, the transfer step S103 of printing the remaining three marks Q4, Q5 and Q6 out of the six marks Q1 to Q6 on the transmission belt C1. The printed mark Q4 is a red English letter mark indicating information about the product as the power transmission belt C1, the printed mark Q5 is a red mark indicating the country of manufacture of the power transmission belt C1, and the printed mark Q6 is: It is a red number mark that displays information about the product as the power transmission belt C1. In the transfer step S103 of the marks Q4, Q5, and Q6, similarly to the marks Q1, Q2, and Q3, after the marks Q4, Q5, and Q6 formed in the mark forming portion 32 are transferred to the pad 41 as the first transfer step S105, , as a second transfer step S106, the marks Q4, Q5, Q6 transferred to the pad 41 are transferred to a plurality of transmission belts C1 that are held while being wound around the pair of pulleys 11, 11. FIG. In the second transfer step S106, the marks Q4, Q5, and Q6 were transferred to the 15 transmission belts C1 for each transfer operation. After the marks Q4, Q5 and Q6 were transferred to the transmission belt C1 in the second transfer step S106, the ink removing step S107 was performed.

After the marks Q1, Q2, Q3, Q4, Q5, and Q6 are printed on the 15 transmission belts C1 that are wound around the pair of pulleys 11 and 11 as described above, the same operation is further performed. Each mark Q1, Q2, Q3, Q4, Q5, and Q6 was printed on 120 power transmission belts C1 in total 7 times.

FIG. 15 is a table showing a list of evaluation items and evaluation results for the printed state of the marks Q on the transmission belt C1 printed in the example. The marks Q1, Q2, Q3, Q4, Q5, and Q6 printed on the transmission belt C1 were visually evaluated for the printing finish. Specifically, as evaluation items, the presence or absence of defects related to the printing position, such as misalignment and inclination of the transferred marks Q, and variations in the intervals between the marks Q, is evaluated, and print quality such as blurring, blurring, and peeling is evaluated. Evaluation was also made on the presence or absence of defects related to As shown in FIG. 15, the evaluation results show the number of defects with respect to the total number of 120 transmission belts C1 printed with marks Q1, Q2, Q3, Q4, Q5, and Q6.

As a result of printing the marks Q1, Q2, Q3, Q4, Q5, and Q6 on the 120 transmission belts C1 described above, the deviations and inclinations of the marks Q1, Q2, Q3, Q4, Q5, and Q6 are I didn't. Moreover, there was no variation in the intervals between the marks Q. Further, the marks Q1, Q2, Q3, Q4, Q5, and Q6 did not bleed, fade, or come off. That is, in all the evaluation items, the number of defective occurrences out of 120 total number is 0, and the 6 types of marks Q1, Q2, Q3, Q4, Q5, and Q6 are good for all 120 transmission belts C1. I was able to print in good condition. Therefore, it was confirmed that the mark Q could be printed unattended without any trouble by the above-described mark printing system 100 for the transmission belt in which the printing process was automated.

INDUSTRIAL APPLICABILITY The present invention can be widely applied to a power transmission belt mark printing method, which is a method of printing marks on a power transmission belt, and a power transmission belt mark printing system for printing marks on a power transmission belt.

10 vulcanization device 11 pair of pulleys 12 rotating shaft 16 mold 17 inner mold 18 outer mold 30 ink supply device 31 ink holding section 32 mark forming section 40 transfer device 41 pad 42 pad driving section 43 cylindrical main body Part 44 Pad rotating shaft 100 Mark printing system C Transmission belt C1 Vulcanized transmission belt (vulcanized transmission belt)
C2 Unvulcanized rubber molding (unvulcanized transmission belt)
M mark S101 vulcanization step S104 cooling step S105 first transfer step S106 second transfer step

Claims (7)

A plurality of unvulcanized annular transmission belts wound around a pair of pulleys are vulcanized by a mold configured to sandwich the unvulcanized transmission belt between the pair of pulleys. a vulcanization process performed
a first transfer step in which marks printed on the transmission belt are transferred from an ink supply device filled with ink to a pad as a transfer medium;
The mark is transferred to the transmission belt by pressing the pad onto which the mark has been transferred in the first transfer step against the transmission belt held by the pair of pulleys in a vulcanized state. 2. A transfer belt mark printing method, comprising: A mark printing method for a transmission belt according to claim 1,
Further comprising a cooling step of cooling the transmission belt after vulcanization ,
The second transfer step of transferring the mark to the transmission belt is performed before the vulcanized transmission belt is cooled in the cooling step,
A power transmission belt characterized by drying the mark transferred to the power transmission belt by the heat applied to the power transmission belt during vulcanization by performing the second transfer step before the cooling step. mark printing method. A mark printing method for a transmission belt according to claim 1 or claim 2,
In the vulcanization step, the pair of molds are configured to be interlocked with the opening and closing of the molds, which are composed of an inner peripheral mold arranged on the inner peripheral side of the power transmission belt and an outer peripheral mold arranged on the outer peripheral side of the power transmission belt. A method of printing a mark on a power transmission belt, characterized in that the plurality of power transmission belts wound around pulleys are circulated. A mark printing method for a transmission belt according to claim 2,
A method of printing marks on a power transmission belt, wherein in the cooling step, the power transmission belt is brought into contact with a cooling medium between the mold and the pulleys while the power transmission belt is rotated by the pair of pulleys. A mark printing method for a transmission belt according to any one of claims 1 to 4,
The pad has the mark transferred from the ink supply device in the first transfer step, and has a columnar main body provided rotatably about a pad rotation axis extending parallel to the rotation axis of the pair of pulleys. have
In the second transfer step, while the transmission belt is rotated by the pair of pulleys, the cylindrical main body portion of the pad is pressed against the transmission belt between the mold and the pulley, and the A mark printing method for a power transmission belt, wherein the mark is transferred to the power transmission belt by rotating the power transmission belt in conjunction with the circular movement of the power transmission belt. A vulcanizing device for vulcanizing a plurality of unvulcanized transmission belts, an ink supply device filled with ink to form marks printed on the transmission belts, and the marks on the vulcanized transmission belts. a transfer device for transferring the
The vulcanization device comprises a pair of pulleys around which the unvulcanized annular transmission belt is wound and held, and the unvulcanized transmission belt sandwiched between the pair of pulleys. a mold for vulcanizing the transmission belt,
The ink supply device has an ink holding section that holds the filled ink, and a mark forming section that forms the mark by supplying the ink from the ink holding section,
The transfer device includes a pad as a transfer medium to which the mark formed in the mark forming portion is transferred, and the pad movably held, and the pad held by the pair of pulleys in a vulcanized state. A mark printing system for a transmission belt, comprising: a pad driving section for driving the pad so as to transfer the mark transferred to the pad to the transmission belt. The transmission belt mark printing system according to claim 6,
The pad has a columnar main body portion rotatably provided around a pad rotation axis extending parallel to the rotation axis of the pair of pulleys,
While the pair of pulleys circulates the transmission belt, between the mold and the pulley, the columnar main body is pressed against the transmission belt and rotates in conjunction with the circulating movement of the transmission belt. a mark printing system for a power transmission belt, wherein the mark is transferred to the power transmission belt.

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