Screen printing plate adhesion cleaning device

Abstract

The utility model discloses a screen printing plate adhesion cleaning device which is characterized in that a winding roller and an unwinding roller which are used for cleaning a sticky film belt are arranged on a movable seat, the screen printing plate adhesion cleaning device further comprises a supporting flat plate and a guide roller set which are horizontally arranged on the movable seat, and the shape and the size of the supporting flat plate correspond to those of a screen printing plate; the supporting flat plate, the winding roller and the unwinding roller are arranged in parallel; the guide roller set comprises a swing rubber roller close to one side of the supporting flat plate, and under the guidance of the guide roller set, the cleaning adhesive film belt led out of the unwinding roller bypasses the swing rubber roller from the lower portion of the supporting flat plate and then returns to the winding roller from the upper portion of the supporting flat plate. And the unwinding roller and the winding roller are respectively connected with a driving motor. The device can work in two modes which are standby for each other. The cleaning sticky film belt abuts against all the bottom surfaces of the pasting templates to conduct comprehensive cleaning; the provided abutting pressure is stable and reliable; an effective standby means is provided, and it can be ensured that cleaning work is completed with high quality and high efficiency.

Description

Technical Field

[0001] The utility model relates to a device for automatically cleaning a screen of screen printing equipment. Background Art

[0002] Screen printing is silk screen printing, which refers to using a silk screen as a base and making a screen with images (screen printing plate) through a photosensitive platemaking method. Screen printing consists of five major elements: screen, printing knife (also called scraper or scraper), ink, printing table and substrate. Printing is based on the basic principle that the mesh holes of the image part of the screen can pass the ink, while the mesh holes of the non-image part cannot pass the ink. When printing, pour ink on one end of the screen, press the screen down with a printing knife and scrape it at a constant speed towards the other end of the screen. During the movement, the ink is squeezed from the mesh holes of the image part by the printing knife onto the substrate.

[0003] In the prior art, when the device loaded with the roll cleaning tape moves linearly into the screen printing equipment to automatically clean the screen, a working roll is directly pressed upward under the screen so that the cleaning tape on the roll fits the screen, and then as the device as a whole moves relative to the screen and the cleaning tape is reeled and unwound, the cleaning tape is continuously updated and the screen is cleaned. For example, the Chinese patent document "A component printer that automatically cleans the bottom of the screen" with application publication number CN 114603990 A published on June 10, 2022, completes the corresponding work by closely fitting the cleaning roll 101 to the printing screen.

[0004] The disadvantage of the existing technology is that the working reliability needs to be improved, which is mainly manifested in the following aspects:

[0005] First, only the cleaning belt part at the top of the working roll arc contacts and cleans the bottom of the screen, and the cleaning effect and reliability need to be improved;

[0006] As the reel is being wound and unwound, the cleaning tape on the working reel is constantly decreasing or increasing, the overall radius of the reel is shrinking / expanding, and the distance between the reel and the screen is constantly changing dynamically. It is difficult to accurately match the contact pressure between the working reel and the screen with this change, which may easily cause the working reel to freeze or the cleaning tape to separate from the screen, affecting the smooth cleaning work or the cleaning quality.

[0007] Moreover, it is difficult to accurately adjust the level of the working roll so that the cleaning belt and the screen are parallel to each other, and the adjustment mechanism is complicated.

[0008] Secondly, the working mode is single. When the working roll cleaning belt presses upward to fit the screen and fails to achieve the cleaning purpose, there is a lack of countermeasures and the only option is disassembly and maintenance. Utility Model Content

[0009] To address the above drawbacks, the technical problem to be solved by the present utility model is to provide a device for automatically cleaning the screen plate of a screen printing device, effectively improving the reliability of its cleaning work. To solve the above technical problem, the technical solution adopted by the present utility model is a screen printing screen adhesion cleaning device, which includes a moving seat installed on a linear guide rail. A winding drum and an unwinding drum for the cleaning adhesive film belt are installed on the moving seat. It is characterized in that it further includes a supporting flat plate and a guiding roller group horizontally installed on the moving seat. The shape and size of the supporting flat plate correspond to the screen plate, and the supporting flat plate is arranged in parallel with the winding drum and the unwinding drum; the guiding roller group includes a swinging rubber roller close to one side of the supporting flat plate. Under the guidance of the guiding roller group, the cleaning adhesive film belt led out by the unwinding drum bypasses the swinging rubber roller from below the supporting flat plate and then returns to the winding drum from above the supporting flat plate; the unwinding drum is connected to a first driving motor; the winding drum is connected to a second driving motor.

[0010] This device can adopt two mutually backup working modes: Mode 1, the moving seat moves forward along the linear guide rail and enters below the screen plate of the screen printing device. The supporting flat plate corresponds to the position of the screen plate, and the swinging rubber roller swings upward to a position where the roller surface is higher than the upper surface of the supporting flat plate; the moving seat moves slowly backward along the linear guide rail. When moving backward, the unwinding drum unwinds, and during the movement of the swinging rubber roller, the cleaning adhesive film belt is pressed against and pasted on the bottom of the screen plate; after the moving seat reaches the designated position, it stops, the unwinding drum stops working, the swinging rubber roller swings downward to reset, and the winding drum winds up, peeling off and collecting the cleaning adhesive film belt pasted on the bottom of the screen plate to complete the cleaning work;

[0011] Mode 2, the moving seat moves forward along the linear guide rail and enters below the screen plate of the screen printing device. The supporting flat plate corresponds to the position of the screen plate. The printing knife of the screen printing device presses down on the screen plate and moves uniformly across the other end of the screen plate. During the movement of the printing knife, it cooperates with the supporting flat plate up and down, pressing the bottom of the screen plate against and pasting it on the cleaning adhesive film belt; after the moving seat reaches the designated position, it stops, the printing knife resets, and the winding drum and the unwinding drum work to peel off and collect the cleaning adhesive film belt pasted on the bottom of the screen plate to complete the cleaning work.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. The cleaning adhesive film belt presses against and pastes the entire bottom surface of the template for cleaning, and the cleaning effect is comprehensive and reliable.

[0014] 2. The working distance between the swinging rubber roller or the printing knife / supporting flat plate and the cleaning adhesive film belt and the screen plate is constant. The parallel fitting state of the cleaning adhesive film belt and the screen plate is accurately constant, and the pressing force provided is stable and reliable, ensuring the cleaning quality.

[0015] 3. In working mode 1, the cleaning mucous tape is pressed against the bottom surface of the screen plate from bottom to top to paste and clean it; in working mode 2, the screen plate is pressed against the bottom surface of the cleaning mucous tape from top to bottom to paste and clean it. The two modes are backup for each other. When a certain mode fails to achieve the cleaning purpose, an effective backup means is provided to ensure the cleaning work is completed with high quality and efficiency without delaying the printing work. At the same time, it is beneficial to carry out the cleaning work in different working scenarios.

[0016] In one embodiment, the cleaning mucous tape is provided with a tension detection component, and the signal of the tension detection component controls the operation of the second driving motor. Preferably, the tension detection component adopts a roller travel switch, and the roller of the roller travel switch abuts against the cleaning mucous tape in a tensioned state. When the cleaning mucous tape is slack and disengages from the roller, a signal is sent to make the second driving motor operate to drive the winding drum to wind. The purpose is to ensure that the cleaning mucous tape is in a tensioned state throughout the cleaning process, avoiding malfunctions or affecting the cleaning effect caused by the slack of the cleaning mucous tape.

[0017] In one embodiment, the torque is transmitted between the second driving motor and the winding drum through an electromagnetic clutch. When the cleaning mucous tape is tensioned, the rotational resistance of the winding drum increases. When the rotational resistance is greater than the set load of the electromagnetic clutch, the active part and the driven part of the electromagnetic clutch are disconnected from the magnetic attraction connection under the action of the rotational resistance, so that the transmission connection between the winding drum and the second driving motor is disconnected. The working principle of the electromagnetic clutch is to use the magnetic field generated by the electromagnet to realize the transmission and cut-off of power between the active part and the driven part. This can avoid over-winding and tearing the cleaning mucous tape.

[0018] In one embodiment, the rotating shaft of the swinging rubber roller is installed at the upper end of the rotating frame below the supporting flat plate. The middle part of the rotating frame is hinged to the moving seat, and the lower end of the rotating frame is hinged to the swinging cylinder. A guide roller B is arranged below the swinging rubber roller, and a photoelectric sensor is correspondingly arranged on the side surface of the cleaning mucous tape between the swinging rubber roller and the guide roller B. The photoelectric sensor is communicatively connected to the swinging cylinder to control the swing angle of the rotating frame.

[0019] In one embodiment, a photoelectric switch for monitoring the thickness of the cleaning mucous tape on the unwinding drum is arranged on the side surface of the unwinding drum. It can remind to replace the cleaning mucous tape in time when it is used up on the unwinding drum.

[0020] Of course, it is not necessary for any product implementing the present utility model to simultaneously achieve all the above-mentioned advantages.

[0021] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0022] It should be understood that the orientation or positional relationships indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present utility model.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0024] In the present utility model, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0027] The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a front view structural schematic diagram of the screen adhesion cleaning device;

[0029] Figure 2 is a top view structural schematic diagram of the screen adhesion cleaning device;

[0030] Figure 3 is a right view structural schematic diagram of the screen adhesion cleaning device;

[0031] Figure 4 is a three-dimensional structural schematic diagram of the screen adhesion cleaning device Figure 1 ;

[0032] Figure 5 is a three-dimensional structural schematic diagram of the screen adhesion cleaning device Figure 2 ;

[0033] Figure 6 is a partial enlarged structural schematic diagram of the swing rubber roller;

[0034] Figure 7 is an exploded structural schematic diagram of the screen adhesion cleaning device;

[0035] Figure 8 is a schematic diagram of the working principle of working mode one;

[0036] Figure 9 is a schematic diagram of the working principle of working mode two. Detailed implementation mode

[0037] Referring to the attached drawings, a specific structure of the present utility model is shown. The screen printing stencil adhesion cleaning device includes a moving seat 1 installed on a linear guide rail 101, and the linear guide rail 101 is installed on a base 102. The moving seat 1 is composed of a first wall plate 104 and a second wall plate 105 fixed on both sides of a bottom plate 103. A moving motor 106 drives the moving seat 1 to reciprocate along the linear guide rail 101 through a synchronous pulley transmission assembly 107 and a lead screw transmission assembly 108.

[0038] A winding drum 201 and an unwinding drum 202 for the cleaning adhesive film belt 2 are installed on the first wall plate 104 of the moving seat 1. A supporting flat plate 3 is horizontally and fixedly installed at the upper ends of the first wall plate 104 and the second wall plate 105 of the moving seat 1. The shape and size of the supporting flat plate 3 correspond to the stencil 5 of the screen printing equipment. The supporting flat plate 3 is arranged in parallel with the winding drum 201 and the unwinding drum 202. In the example, the unwinding drum 202 is located between the supporting flat plate 3 and the winding drum 201.

[0039] A guide roller group for the cleaning adhesive film belt 2 is also provided on the moving seat. In the example, the guide roller group includes a swing rubber roller 401, a guide roller A 402, a guide roller B 403, a guide roller C 404, a guide roller D 410, and a guide roller E 411 on the side close to the supporting flat plate 3. Under the guidance of the guide roller group, the cleaning adhesive film belt 2 led out by the unwinding drum 202 bypasses the swing rubber roller 401 from below the supporting flat plate 3 and then returns to the winding drum 201 from above the supporting flat plate 3; the unwinding drum 202 is connected to a first driving motor 203; the winding drum 201 is connected to a second driving motor 204. In the example, photoelectric switches 205 for monitoring the thickness of the cleaning adhesive film belt 2 wound on the unwinding drum 202 are correspondingly arranged on both sides of the unwinding drum 202. A signal is sent when the cleaning adhesive film belt 2 on the unwinding drum 202 is used up to remind to replace it in time.

[0040] This device includes two mutually backup working modes:

[0041] Mode 1: The moving motor 106 works, and the moving seat 1 moves forward along the linear guide rail 101 into the screen printing equipment and moves below the stencil 5. The position is limited by a position-adjustable limiting member 109 so that the supporting flat plate 3 and the stencil 5 are exactly in correspondence.

[0042] The swing rubber roller 401 swings upward to a position where the roller surface is higher than the upper surface of the support flat plate 3; in the example, the rotating shaft of the swing rubber roller 401 is installed at the upper end of the rotating frame 406 below the support flat plate 3, the middle part 407 of the rotating frame 406 is hinged to the first wall plate 104 of the moving seat 1, and the lower end of the rotating frame 406 is hinged to the swing cylinder 408; a guiding roller B403 is arranged below the swing rubber roller 401, and a photoelectric sensor 409 is correspondingly arranged on the side surface of the cleaning adhesive film belt 2 between the swing rubber roller 401 and the guiding roller B403; the photoelectric sensor 409 is communicatively connected to the swing cylinder 408 to control the swing degree of the rotating frame 406, so that the position of the swing rubber roller 401 is appropriate, thereby ensuring the fitting of the cleaning adhesive film belt 2 to the bottom surface of the screen plate 5.

[0043] The moving seat 1 moves slowly in the reverse direction along the linear guide rail 101, and the unwinding roller 202 unwinds the cleaning adhesive film belt 2 during the reverse movement; during the reverse movement, the swing rubber roller 401 presses the cleaning adhesive film belt 2 against and pastes it on the bottom of the screen plate 5; the cleaning adhesive film belt 2 covers the entire bottom surface of the template 5; moreover, the parallel fitting state and the working distance between the swing rubber roller 401, the cleaning adhesive film belt 2 and the screen plate 5 are always kept constant without change, and the pressing pressure is stable and reliable.

[0044] After the moving seat 1 reaches the specified position, it stops, the unwinding roller 202 stops unwinding, the swing rubber roller 401 swings downward to reset, and the winding roller 201 winds up, peeling off and collecting the cleaning adhesive film belt 2 pasted on the bottom of the screen plate 5, thus completing one cleaning operation.

[0045] In Mode 2, the moving motor 106 works, the moving seat 1 moves forward along the linear guide rail 101 and enters the screen printing equipment and moves below the screen plate 5, and the position is limited by the position-adjustable limiting member 109 so that the support flat plate 3 and the screen plate 5 are exactly corresponding in position;

[0046] The printing knife 6 of the screen printing equipment presses down on the screen plate 5 and moves uniformly across the screen plate 5 towards the other end. This action of the printing knife 6 is the same as the action in screen printing, and no additional working mechanism is required.

[0047] During the movement of the printing knife 6, it cooperates with the support flat plate 3 up and down to clamp the screen plate 5 and the cleaning adhesive film belt 2, and presses the bottom of the screen plate 5 against and pastes it on the cleaning adhesive film belt 2; the cleaning adhesive film belt 2 also covers the entire bottom surface of the template 5; moreover, the parallel fitting state and the working distance between the printing knife / support flat plate, the cleaning adhesive film belt 2 and the screen plate 5 are always kept constant without change, and the pressing pressure is stable and reliable.

[0048] The printing knife 6 resets, the winding roller 201 and the unwinding roller 202 work, peel off and collect the cleaning adhesive film belt 2 pasted on the bottom of the screen plate 5, and the moving seat 1 resets, completing one cleaning operation.

[0049] The above working mode 1 presses the cleaning mucous tape 2 from bottom to top to make it stick to and clean the bottom surface of the screen plate 5; working mode 2 presses the screen plate 5 from top to bottom to make its bottom surface stick to and clean the cleaning mucous tape 2; the two modes are used as backups for each other. When the cleaning effect of a certain mode is not ideal, the other mode can be used for cleaning to ensure that the cleaning work can be completed with high quality and efficiency, without delaying the printing work due to disassembly and maintenance; at the same time, it is beneficial to carry out the cleaning work in different working scenarios.

[0050] In the example, the cleaning mucous tape 2 is provided with a tension detection component. The tension detection component uses a roller travel switch. The roller 405 of the roller travel switch abuts against the cleaning mucous tape 2 in a tensioned state. When the cleaning mucous tape 2 is slack and disengages from the roller 405, the roller travel switch emits a signal to make the second drive motor 203 act to drive the winding drum 202 to wind. The purpose is to ensure that the cleaning mucous tape 2 is in a tensioned state throughout the cleaning process, avoiding malfunctions or affecting the cleaning effect caused by the slack of the cleaning mucous tape 2. For example, wrinkles appear on the cleaning mucous tape 2, affecting the fit with the bottom surface of the screen plate 5 and resulting in incomplete local cleaning.

[0051] In the example, torque is transmitted between the second drive motor 203 and the winding drum 202 through an electromagnetic clutch 206. When the cleaning mucous tape 2 is tensioned, the rotational resistance of the winding drum 202 increases. When this rotational resistance is greater than the set load of the electromagnetic clutch 206, under the action of this rotational resistance, the active part and the driven part of the electromagnetic clutch 206 are disconnected from the magnetic attraction connection, so that the transmission connection between the winding drum 202 and the second drive motor 203 is disconnected.

[0052] The working principle of the electromagnetic clutch is to use the magnetic field generated by an electromagnet to realize the transmission and cut-off of power between the active part and the driven part. In the prior art, the action of the electromagnetic clutch is controlled by the on-off of the magnetic field power supply. When the coil of the electromagnetic clutch is powered off, the magnetic field disappears, and the magnetic material disengages from the electromagnetic chuck under the action of the spring, so that the magnetic force between the active part and the driven part disappears, realizing the cut-off of power.

[0053] The characteristics of the technical solution of the present utility model are that the action of the electromagnetic clutch 206 is not controlled by the magnetic field power supply, but the magnetic attraction connection between the active part and the driven part is forcibly broken by the rotational resistance. The electromagnetic clutch 206 in the present utility model plays an insurance role similar to a fuse, avoiding excessive winding of the winding drum 202 and tearing the cleaning mucous tape 2. By adjusting the magnitude of the coil current of the electromagnetic clutch 206, the magnetic field strength can be changed, so as to set the magnetic attraction connection strength between the active part and the driven part, and realize the adjustment and setting of the set load of the electromagnetic clutch 206.

[0054] The embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, according to the content of this specification, many modifications and variations can be made. This specification selects and combines the accompanying drawings to specifically describe these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the relevant technical field can well understand and utilize the present utility model. However, the present utility model can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is only limited by the claims and their full scope and equivalents, and is not limited by the specific embodiments disclosed.

Claims

1. A screen printing stencil adhesion cleaning device, comprising a moving seat installed on a linear guide rail, and a winding roller and an unwinding roller for cleaning the adhesive film belt are installed on the moving seat, characterized in that, It further includes a support flat plate and a guide roller group horizontally installed on the moving seat. The shape and size of the support flat plate correspond to the screen plate, and the support flat plate is arranged in parallel with the winding roller and the unwinding roller; the guide roller group includes a swing rubber roller on one side close to the support flat plate. Under the guidance of the guide roller group, the cleaning mucous tape led out by the unwinding roller bypasses the swing rubber roller from below the support flat plate and then returns to the winding roller from above the support flat plate; the unwinding roller is connected to a first driving motor; the winding roller is connected to a second driving motor.

2. The screen printing stencil adhesion cleaning device according to claim 1, characterized in that, The cleaning mucous tape is provided with a tension detection component, and the signal of the tension detection component controls the action of the second driving motor.

3. The screen printing stencil adhesion cleaning device according to claim 2, wherein, The tension detection component adopts a roller travel switch, and the roller of the roller travel switch abuts against the cleaning mucous tape in a tensioned state. When the cleaning mucous tape is slack and disengages from the roller, a signal is sent to make the second driving motor act to drive the winding roller to wind.

4. A screen printing stencil adhesion cleaning device according to any one of claims 1-3, characterized in that, Torque is transmitted between the second driving motor and the winding roller through an electromagnetic clutch. When the cleaning mucous tape is tensioned, the rotational resistance of the winding roller increases. When the rotational resistance is greater than the set load of the electromagnetic clutch, the driving part and the driven part of the electromagnetic clutch are disconnected from the magnetic attraction connection under the action of the rotational resistance, so that the transmission connection between the winding roller and the second driving motor is disconnected.

5. A screen printing stencil adhesion cleaning device according to any one of claims 1 to 3, characterized in that, The rotating shaft of the swing rubber roller is installed at the upper end of the rotating frame below the support flat plate. The middle part of the rotating frame is hinged on the moving seat, and the lower end of the rotating frame is hinged to a swing cylinder; a guide roller B is arranged below the swing rubber roller, and a photoelectric sensor is correspondingly arranged on the side surface of the cleaning mucous tape between the swing rubber roller and the guide roller B; the photoelectric sensor is communicatively connected to the swing cylinder to control the swing angle of the rotating frame.

6. The screen printing stencil adhesion cleaning device according to claim 4, wherein, The rotating shaft of the swing rubber roller is installed at the upper end of the rotating frame below the support flat plate. The middle part of the rotating frame is hinged on the moving seat, and the lower end of the rotating frame is hinged to a swing cylinder; a guide roller B is arranged below the swing rubber roller, and a photoelectric sensor is correspondingly arranged on the side surface of the cleaning mucous tape between the swing rubber roller and the guide roller B; the photoelectric sensor is communicatively connected to the swing cylinder to control the swing angle of the rotating frame.

7. A screen printing stencil adhesion cleaning device according to any one of claims 1, 2, 3, and 6, characterized in that A photoelectric switch for monitoring the thickness of the cleaning mucous tape on the unwinding roller is arranged on the side surface of the unwinding roller.

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