KR102499872B1 - A folding device for the manufacture of adhesive vinyl wrapping paper - Google Patents

Abstract

The present invention does not separately implement the printing and half-folding operations in each device, but in the process of transferring the vinyl fabric, after applying a printed layer such as a logo on the surface of the vinyl fabric being transported, it goes through a drying process for a certain period of time. Then, the vinyl fabric is automatically folded in half to automatically manufacture the vinyl fabric of a semi-finished product in the form of an accommodation space that can accommodate the contents inside, so that two processes can be continuously processed in one device. Provided is a half-folding device for manufacturing plastic wrapping paper.

Description

A folding device for the manufacture of adhesive vinyl wrapping paper}

The present invention relates to a half-folding device for manufacturing self-adhesive vinyl wrapping paper, and more particularly, in the process of transferring vinyl fabric, after applying a printed layer such as a logo on the surface of the vinyl fabric being transported, a drying process for a certain time After going through, it relates to a half-folding device for manufacturing self-adhesive vinyl wrapping paper that automatically folds the vinyl fabric in half and automatically manufactures the vinyl fabric of a semi-finished product in the form of an accommodation space formed therein to accommodate the contents.

In general, plastic wrappers are manufactured to easily and hygienically contain industrial products such as clothing or items such as agricultural and fishery products and processed foods. It is provided to pack one by one.

Conventional self-adhesive plastic wrapping paper is sealed on both sides and top or bottom so as to be provided in the form of an open envelope with an upper or lower portion depending on the processing state of the wrapping paper to accommodate the product. In addition, an adhesive is applied to the adhesive surface extending to one side of the open side, and the adhesive portion is folded and adhered to the corresponding envelope to close the above-described open portion, thereby protecting the contents contained therein from external contamination.

In this way, the self-adhesive vinyl wrapping paper is used in such a way that the opening is closed to protect the contents after accommodating the contents, and the adhesive is removed when the consumer or the like wants to use the contents.

The self-adhesive vinyl wrapper goes through a printing process, a drying process, a half-folding process, an adhesive film attaching process, and a heat bonding process at both ends of the wrapping paper to manufacture adhesive vinyl wrapping paper from vinyl fabric wound in a roll form.

However, the conventional self-adhesive vinyl wrapping paper manufacturing apparatus has to be provided individually for each process, so that after one process is completed, the work must be continued by moving the fabric vinyl to the next process, resulting in reduced workability and productivity There is a problem that causes deterioration.

Korean Intellectual Property Office Publication No. 10-2017-0033994 Korean Intellectual Property Office Publication No. 10-2011-0123607

Therefore, the object of the present invention to solve the above problems is not to separately implement the printing and half-folding operations in each device, but to print a logo on the surface of the vinyl fabric being transported in the process of transporting the vinyl fabric. After applying the layer, it is allowed to go through a drying process for a certain period of time, and then the vinyl fabric is automatically folded in half to automatically manufacture a semi-finished vinyl fabric in the form of an accommodation space that can accommodate the contents inside. It is to provide a half-folding device for manufacturing self-adhesive vinyl wrapping paper in which two processes are continuously processed in the device.

The present invention for achieving the above object is a half-folding device for manufacturing self-adhesive vinyl wrapping paper, a body frame composed of vertical and horizontal frames, a vinyl installed at the rear of the body frame and sandwiched with vinyl fabric wound in a roll form. A fabric supply roll, a tilting arm having one end connected to the vinyl fabric supply roll and the other end connected to a rotating shaft, installed in the center of the tilting arm and tilting the tilting arm based on the rotating shaft to move the vinyl fabric supply roll A supply unit composed of a cylinder that moves up and down, a printing liquid storage tank installed on the body frame in a state located above the supply unit and having a space in which the printing liquid can be contained while the top is open, the printing liquid The surface of the vinyl fabric is composed of a printing roll that rotates in a state partially impregnated with the printing liquid contained in the storage tank, and a rubber roll located on top of the printing roll and elastically pressurizing the vinyl fabric passing through the printing roll. A printing unit for applying a printing layer to the printing roll, a scraper blade in contact with the surface of the printing roll, a shaft coupled to the scraper blade, and inserted into a space provided at one end of the shaft, in the process of eccentric rotation by the power of a motor. A scraper means for scraping and removing the printing liquid on the surface of the printing roll by moving the shaft and the scraper blade coupled to the shaft to the left and right, installed on the upper part of the body frame and inside the printing layer through the printing unit A drying unit provided with a space for drying the coated vinyl fabric, a tension control roller installed in front of the body frame and maintaining the tension of the vinyl fabric by pressing the vinyl fabric passing through the drying unit with its own weight, and the tension control roller A width control roller located in front of and passing through the vinyl fabric passing through the tension control roller, installed at both ends of the width control roller and guided so that the center of the vinyl fabric passes through the center of the width control roller A width adjusting part composed of side guides, located above the width adjusting roller, and vinyl being transported upward while passing through the width adjusting roller. A half-folding unit composed of a half-fold disc that presses the front side of the fabric to induce the vinyl fabric to be transported upward in a state where the vinyl fabric is folded in half. A vinyl fabric winding unit composed of a vinyl fabric winding roll that winds and winds a vinyl fabric folded in half through a vinyl fabric winding unit, located between the half-folding unit and the vinyl fabric winding unit, and on one side of the vinyl fabric wound on the vinyl fabric winding roll. It is characterized in that it comprises an adhesive film supply roll for adhering the adhesive film to the extended adhesive surface portion.

The folio unit includes a support, a lead screw that is screwed into the fastening hole of the support and moves forward and backward through the fastening hole in the process of rotating by the operation of the handle, and is connected to the lead screw by a connection frame to A slider that moves later, one end of which is pin-coupled to the slider and the other end of which is shaft-coupled to the folio disc, and a link connecting the folio disc to the slider to move the folio disc forward and backward. It is preferable to install a moving means.

The present invention does not separately implement the printing and half-folding operations in each device, but in the process of transferring the vinyl fabric, after applying a printed layer such as a logo on the surface of the vinyl fabric being transported, it goes through a drying process for a certain period of time. Then, the vinyl fabric is automatically folded in half to automatically manufacture the vinyl fabric of a semi-finished product in the form of an accommodation space that can accommodate the contents inside, thereby continuously processing two processes in one device to increase productivity And it has the effect of increasing economic feasibility.

1 is a view showing the self-adhesive vinyl wrapper of the present invention.
Figure 2 is a view showing a process in which printing and half-folding processes are performed on vinyl fabric through a half-folding device for manufacturing self-adhesive vinyl wrapping paper of the present invention.
Figure 3 is a side view showing the overall configuration of the half-folding device for producing self-adhesive vinyl wrapping paper according to the present invention.
Figure 4 is a plan view of Figure 3;
Figure 5 is a front view of Figure 3;
Figure 6 is a view showing the configuration of the supply unit extracted from Figure 3;
Figure 7 is a use state diagram of Figure 6;
FIG. 8 is a view showing the configuration of the printing unit in FIG. 3;
FIG. 9 is a plan view illustrating an excerpt of the scrapper chatter in FIG. 8;
Fig. 10 is a front view of Fig. 9;
11 is an operating state diagram of the scraper means.
Figure 12 is a view showing the configuration of the drying unit extracted from Figure 3;
FIG. 13 is a view showing the structure of the folio unit in FIG. 3 extracted from it;
Fig. 14 is a plane view of the width adjusting roller in Fig. 13;
FIG. 15 is a plane view of the front and rear moving means for moving the half-fold disk forward and backward in FIG. 13;

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the detailed description to be described later, a representative embodiment of the present invention will be presented in order to achieve the above-described technical problem. And other embodiments that can be presented as the present invention are replaced by description in the configuration of the present invention.

Attached Figure 1 is a view showing a vinyl fabric folded in half using a half-folding device for producing adhesive vinyl wrapping paper of the present invention, Figure 2 is a vinyl half-finished product used for manufacturing the vinyl fabric shown in FIG. It is a drawing showing the process of manufacturing the fabric.

As shown in FIGS. 1 and 2, the half-folding device for manufacturing adhesive vinyl wrapping paper applies a printed layer 2 such as a logo on the surface of the vinyl fabric in the process of manufacturing the vinyl fabric 1 wound on a roller as vinyl wrapping paper. In addition, it is a means provided for the purpose of continuously performing the process of folding the vinyl fabric 1 coated with the printing layer 2 in half and then winding it around the take-up roller in one device. The vinyl fabric 1 wound on the winding roller is manufactured into an adhesive vinyl wrapping paper 300 of a finished product having an accommodation space 4 therein as shown in FIG. 1 through the next process of fusion and cutting.

Attached Figure 3 is a side view showing the overall configuration of a half-folding device for manufacturing self-adhesive plastic wrapping paper according to a preferred embodiment of the present invention, Figure 4 is a view showing the front of Figure 3, Figure 5 is a view It is a drawing showing the plane of 3.

As shown in FIGS. 3 to 5, the half-folding device for manufacturing self-adhesive vinyl wrapping paper includes a body frame 200 largely constituting a skeleton, a supply unit 10 supported by the body frame 200, and printing It is composed of a unit 20, a drying unit 60, and a folio unit 70.

The supply unit 10 is disposed behind the body frame 200 and is a means for supplying the vinyl fabric 1 to the printing unit 20 . Referring to FIGS. 1, 6, and 7, the supply unit 10 includes a roll 12 for passing the vinyl fabric 1 wound in a roll form, and a vinyl fabric ( 1) is composed of at least one guide roll 19 guiding so that it can be supplied to the printing unit 20.

One end of the tilting arm 14 is coupled to the moving roll 12, and a rotating shaft 16 is coupled to the other end of the tilting arm 14. In addition, the rod of the cylinder 18 is coupled to the center of the tilting arm 14, and according to the driving of the cylinder 18, the tilting arm 14 tilts from the rotation axis 16 as a starting point, and the moving roll ( 12) is lifted, and through this operation, it is possible to implement placing the vinyl fabric 1 on the passing roll 12.

The printing unit 20 is a unit that applies various printed layers 2 such as logos or characters to one side of the vinyl fabric 1 supplied from the supply unit 10 .

As shown in FIGS. 1 and 8 , the printing unit 20 includes a printing liquid storage tank 22 , a printing roll 28 , a rubber roll 32 , a guide roll, and a scraper unit 50 .

The printing liquid storage tank 22 is installed at the rear of the main body frame 200, and a space 24 capable of containing a certain amount of printing liquid 26 is provided therein while the upper end is open.

The printing roll 28 is located in the space 24 of the printing liquid storage tank 22 and is partially impregnated with the printing liquid 26 contained in the space 24 so that the outer surface is covered with the printing liquid 26 do.

The rod of the cylinder 18 is connected to the printing roll 28, and the printing roll 28 moves up and down by driving the cylinder 18, and the printing fluid is moved in the space 24 of the printing fluid storage tank 22. Allows you to adjust the height according to the water level.

The rubber roll 32 is located above the printing roll 28 and elastically presses the vinyl fabric 1 passing through the printing roll 28 to conform to the pattern engraved on the printing roll 28 to form a printed layer. (2) is applied.

The rod of the cylinder 34 is coupled to the upper end of the rubber roll 32, and the rubber roll 32 moves up and down by driving the cylinder 34, and the pressure applied to the vinyl fabric 1 can be adjusted. .

The scraper unit 40 periodically scrapes the surface of the printing roll 28 to prevent the printing liquid 2 applied to the surface of the printing roll 28 from hardening and sticking.

As shown in FIGS. 9 to 11 , the scraper means 40 is coupled to a shaft 48 reciprocating left and right by the power of a motor 42 and an outer surface of the shaft 48, and the printing roll 28 It consists of a scraper blade 50 in contact with the surface.

The scraper blade 50 moves left and right on the surface of the print roll 28 according to the operation of the shaft 48 while in contact with the surface of the print roll 28, and the surface of the print roll 28 Scrape off the printing liquid (2) on the surface.

The connection structure between the shaft 48 and the motor 42 is formed at the end of the cam 44, the shaft 48, which rotates eccentrically while being coupled to the shaft of the motor 42, and the cam 44 It is composed of a space 46 provided to be fitted. The shaft 48 is manufactured to have a length corresponding to the length of the printing roll 28, and the scraper blade 50 is also manufactured to have a length corresponding to the printing roll 28.

The shaft 48 and the scraper blade 50 are supported by the body frame 200 while being positioned in front of the printing roll 28 .

The shaft 48 reciprocates in the left and right directions according to the eccentric rotation of the cam 44 driven by the motor 42, and in this process, the scraper blade 50 coupled to the shaft 48 ) moves left and right while in contact with the surface of the printing roll 28 and scrapes the surface of the printing roll 28 to remove the printing liquid.

As shown in FIG. 12, the drying unit 60 is located above the body frame 200 and dries the vinyl fabric 1 on which the printing layer 2 is applied via the printing unit 20. .

The drying unit 60 is located on the upper part of the body frame 200 and has a housing 62 having a drying chamber 64 inside, a blower 66 installed at the outlet of the housing 62 and supplying hot air to the drying chamber. ) and at least one guide roll 68 installed in the inner drying chamber 64 of the housing 62 and guiding the movement of the vinyl fabric 1.

The vinyl fabric 1 passing through the drying unit 60 is supplied to the half-folding unit 70 and folded in half in a state where the printed layer 2 applied to the surface is completely dried.

The half-folding unit 70 is a unit provided for the purpose of forming an accommodation space 6 in which contents such as food can be contained by folding the vinyl fabric 1 passed through the drying unit 60 in half. am.

Referring to FIGS. 1 and 3 and FIGS. 13, 14, and 15, the filament unit 70 requires a configuration of a tension control roller 72, a width control roller 80, and a filament disc 90.

The tension control roller 72 is a means for adjusting the tension of the vinyl fabric 1 passing through the drying unit 60.

The tension control roller 72 adjusts the tension by pressing the vinyl fabric 1 with its own weight while in contact with the vinyl fabric 1. At both ends of the tension adjusting fabric 72, guide stands 74 for guiding the up and down movement of the tension adjusting fabric 72 are installed. A guide hole 76 of a long hole is formed in the guide table 74, and guides the tension control fabric in a state where both ends of the tension control fabric 72 are fitted into the guide hole 76.

The width control roller 80 biases the half-fold disc 90 to one side of the vinyl fabric 1 when the vinyl fabric 1 passing through the tension control roller 72 passes the half-fold disk. It is a means for adjusting the center of the vinyl fabric 1 to come to the center of the width adjusting roller 80 so as not to press it in the state of being.

Width adjusting parts 84 including side guides 82 are installed at both ends of the width adjusting roller 80 . The side guides 82 of the width control unit 84 contact both ends of the vinyl fabric 1, and the center of the vinyl fabric 1 passing through the width control roller 80 is the width control roller 80 It guides you through the state located in the center of the

The half-fold disc 90 is a means for folding the vinyl fabric 1 via the width control roller 80 in half. At this time, the half-fold disk 90 does not exactly fold the center of the vinyl fabric 1 in half, but folds the vinyl fabric 1 in a state slightly biased to the left or right from the center of the vinyl fabric 1. It is preferable to do so, so that one side of the vinyl fabric (1) folded in half through the half-fold disk (90) is a little longer than the other side, so that the adhesive film on one side of the vinyl fabric (1) is extended. This is to provide an adhesive surface portion 9 to which (8) can be attached.

Forward and backward moving means are installed on the half-fold disk (90). The front and rear moving means control the pressing pressure of the half-fold disk that presses the vinyl fabric (1) when the vinyl fabric (1) is not folded well due to the difference in thickness or material of the vinyl fabric (1). This allows the vinyl fabric to be folded stably.

The forward and backward movement means is screwed to the support 92 and the fastening hole 93 of the support 92, and moves forward and backward along the thread of the fastening hole 93 in the process of rotating with the operation of the handle. a lead screw 94 connected to the lead screw 94 by a connecting frame 96 and moving forward and backward; 90) and consists of a link 100 connecting the half-fold disk 90 to the slider 98.

The vinyl fabric 1 folded in half passing through the half-fold disc 90 is wound around the vinyl fabric winding roll 116, which is the winding unit 110, and supplied to the next process, the wrapping paper manufacturing device.

As shown in FIG. 3, the winding unit 110 is located on one side of the front of the body frame 200, and at least one guide roll 112 guides the movement of the vinyl fabric 1 passing through the half-fold disk 90. ), the vinyl fabric 1 passing through the guide roll 112 is wound and rotated by the power of the motor 114, and consists of a vinyl fabric winding roll 116 that continuously winds and winds the vinyl fabric 1 .

An adhesive film supply roll 120 is positioned between the guide roll 112 and the vinyl fabric winding roll 116.

The adhesive film supply roll 120 is attached to the adhesive surface portion 9 extending from one side of the vinyl fabric 1 wound around the winding roll 16 in a state supported by the body frame 200. It is a means of attaching (8).

In the adhesive film supply roll 120, the adhesive film 8 is wound in a roll type, and the adhesive film 8 wound around the adhesive film supply roll 120 is a vinyl fabric winding roll while the worker holds the adhesive film by hand. When contacting the adhesive surface 9 of the vinyl fabric 1 in the state of being wound around (116), the adhesive film 8 is automatically drawn out according to the speed at which the vinyl fabric 1 is wound, and the adhesive of the vinyl fabric 1 It is continuously adhered to the surface portion 9 and is wound around the vinyl fabric winding roll 116 together with the vinyl fabric 1.

The half-folding device for manufacturing self-adhesive vinyl wrapping paper of the present invention configured as described above allows the printing layer 2 to be applied to the surface of the vinyl fabric 1 while the vinyl fabric 1 wound in a roll type is pulled out, and the printing layer 2 is applied. The vinyl fabric 1 coated with the layer 2 is folded in half so that the vinyl fabric 1 is wound around the vinyl fabric take-up roll 116 while the accommodation space 4 is provided inside the vinyl fabric 1.

Specifically, when the vinyl fabric 1 wound around the vinyl fabric supply roll 12 constituting the supply unit 10 passes between the printing roll 28 and the rubber roll 32 of the printing unit 20, the printing The printing liquid on the surface of the roll 28 applies the printing layer 2 to the vinyl fabric 1, and the vinyl fabric 1 coated with the printing layer 2 has a plurality of guide rolls 38. After passing through, it is supplied to the drying unit 60 located above the body frame 200.

At this time, the surface of the printing roll 28 with the printing liquid is continuously removed by the scraper means 40 to prevent the printing liquid from sticking to the surface of the printing roll due to solidification of the printing liquid. That is, when the cam 44 is eccentrically rotated by the drive of the motor 42, which is the scraper means 40, the shaft 48 horizontally reciprocates in the left and right directions by the eccentric rotation of the cam 44, In this process, the scraper blade 50 coupled to the shaft 48 moves left and right while in contact with the surface of the printing roll 28 to scrape the surface of the printing roll 28 to remove the printing liquid. .

In the process of passing through the housing 62 of the drying unit 60, the vinyl fabric introduced into the drying unit 60 dries the printing liquid applied to the surface by hot air blown from the blower 64.

Next, the vinyl fabric 1 that has completed the drying process of the printing liquid is put into the half-folding unit 70 and then wound around the vinyl fabric take-up roll 116 in a state of being folded in half.

The vinyl fabric 1 passing through the drying unit 60 first passes through the tension control roller 72 of the half-folding unit 70, and at this time, the tension control roller 72 is in contact with the vinyl fabric 1. Press the vinyl fabric (1) with its own weight to prevent sagging of the vinyl fabric (1) being transported.

And the vinyl fabric 1 passing through the tension control roller 72 passes through the width control roller 80, where the vinyl fabric 1 is installed on both ends of the width control roller 80, side guides ( In the process of passing through the roller, the central part of the vinyl fabric can pass through in a state matched to the central part of the roller.

Next, the vinyl fabric 1 passing through the width control roller 80 passes through the half-fold disk 90. At this time, the half-fold disk 90 is slightly biased to one side from the center of the vinyl fabric 1. In this state, the vinyl fabric (1) is pressed, and in this process, the vinyl fabric (1) is folded starting from the half-fold original plate (90).

In addition, the folded vinyl fabric 1 is wound around the vinyl fabric winding roll 116 provided on one front side of the body frame 200, and at this time, the adhesive surface portion 9 extending from one side of the vinyl fabric 1 ), in a state where the adhesive film 8 drawn out from the adhesive film supply roll 122 is adhered, the vinyl fabric 1 is wound around the vinyl fabric winding roll 116, so that the printing layer and the adhesive film in a half folded state The semi-finished vinyl fabric adhered to (8) is manufactured.

On the other hand, the manufactured semi-finished vinyl fabric is bonded through the bonding process, which is the next step, and then cut at certain lengths through the cutting process to produce adhesive vinyl wrapping paper for the finished product.

1: vinyl fabric 2: printing layer
4: space 8: adhesive film
9: adhesive surface portion
10: supply unit 12: vinyl fabric supply roll
20: printing unit 22: printing fluid reservoir
28: printing roll 32: rubber roll
40: scraper means 42: motor
44: cam 48: shaft
50: scraper blade 60: drying unit
70: half-folding unit 72: tension control roller
80: width control roller 90: half-fold disc
94: lead screw 98: slider
110: winding unit 116: vinyl fabric winding roll
120: adhesive film supply roll 200: body frame
300: adhesive vinyl wrapping paper

Claims (2)

In the half-folding device for manufacturing adhesive vinyl wrapping paper,
Body frame 200 composed of vertical and horizontal frames;
A vinyl fabric supply roll 12 installed at the rear of the body frame 200 and into which the vinyl fabric 1 wound in the form of a roll is inserted;
a tilting arm 14 having one end connected to the vinyl fabric supply roll 12 and the other end connected to the rotating shaft 16;
Supply consisting of a cylinder 18 installed at the center of the tilting arm 14 and moving the vinyl fabric supply roll 12 up and down by tilting the tilting arm 14 with the rotation shaft 16 as a starting point unit 10;
A printing fluid storage tank 22 installed on the body frame 200 in a state located above the supply unit 10 and having a space 24 in which the printing fluid 26 can be contained while the top is open. ;
a printing roll 28 rotating in a state partially impregnated with the printing liquid 26 contained in the space 24 of the printing liquid storage tank 22;
It is located on the top of the printing roll 28 and consists of a rubber roll 32 that elastically presses the vinyl fabric 1 passing through the printing roll 28, and the printing layer 2 on the surface of the vinyl fabric 1 ) is applied to the printing unit 20;
a scraper blade 50 in contact with the surface of the printing roll 28;
a shaft 48 coupled to the scraper blade 50;
The shaft 48 and the scraper blade 50 coupled to the shaft 48 are inserted into the space 46 provided at one end of the shaft 48 and eccentrically rotated by the power of the motor 42. a scraper means (40) for scraping and removing the printing liquid adhering to the surface of the printing roll (28) by moving it left and right;
A drying unit 60 installed on the upper part of the body frame 200 and provided with a space 64 for drying the vinyl fabric 1 coated with the printing layer 2 through the printing unit 20 therein;
A tension control roller 72 installed in front of the body frame 200 and maintaining tension of the vinyl fabric 1 by pressing the vinyl fabric 1 passing through the drying unit 60 with its own weight;
A width control roller 80 located in front of the tension control roller 72 and passing the vinyl fabric 1 passing through the tension control roller 72;
A width control unit installed at both ends of the width control roller 80 and composed of side guides 82 guiding the center of the vinyl fabric 1 to pass through a state located at the center of the width control roller 80;
Located above the width control roller 80 and passing through the width control roller 80, the front surface of the vinyl fabric 1 being transferred upward is pressed to fold the vinyl fabric 1 in half. a folio unit 70 composed of a bifold disk 90 guiding to be transported upward;
A vinyl fabric winding roll 116 installed on one front side of the body frame 200, driven by the power of a motor 114, and winding the vinyl fabric 1 folded in half through the half-folding unit 70 and winding it. The configured vinyl fabric winding unit 110;
It is located between the half-folding unit 70 and the vinyl fabric winding unit 110, and the adhesive surface portion 9 extending from one side of the vinyl fabric 1 wound around the vinyl fabric winding roll 116 A half-folding device for manufacturing adhesive vinyl wrapping paper, characterized in that it comprises an adhesive film supply roll 120 for adhering the adhesive film 8 with a).
According to claim 1,
In the folio unit 70;
support 92;
a lead screw (94) that is screwed into the fastening hole (93) of the support (92) and moves forward and backward through the fastening hole (93) in the process of being rotated by the operation of the handle;
a slider 98 connected to the lead screw 94 through a connecting frame 96 and moving forward and backward;
One end is pin-coupled to the slider 98 and the other end is axially coupled to the half-fold disc 90 and composed of a link 100 connecting the half-fold disc 90 to the slider 98, so that the half-fold A half-folding device for manufacturing self-adhesive vinyl wrapping paper, characterized in that a front and rear moving means for moving the disk 90 forward and backward is installed.

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