KR20110033527A - Apparatus for cleaning and feeding polaroid film - Google Patents

Abstract

PURPOSE: An apparatus for cleaning and feeding a polarized film are provided to improve a work efficiency by transferring a polarized film in horizontal while enabling it to automatically be cleaned. CONSTITUTION: A first horizontal transfer unit(100) absorbs a polarized film and horizontally transfer it. The first horizontal transfer unit includes a servo motor and a ball screw which is rotated by the servo motor. A first cleaning unit(110) washes top side of the polarized film which is transferred horizontally by the first horizontal transfer unit. A second transfer unit(120) picks up the washed polarized film and horizontally transfers it. A second cleaning unit(130) cleans the bottom of the polarized film which is picked up by the second transfer unit and is transferred horizontally.

Description

Polarizing film cleaning transfer device {APPARATUS FOR CLEANING AND FEEDING POLAROID FILM}

The present invention relates to a polarizing film cleaning transfer device, and more particularly, in attaching the polarizing film to the LCD panel surface during the LCM board (LCD module board) manufacturing process, by cleaning the upper and lower sides of the polarizing film supplied from one side The present invention relates to a device for feeding and feeding a polarizing film attachment unit.

In general, an LCM board for a liquid crystal display device used in a mobile phone includes an LCD panel (including a driving chip), and a backlight unit that diffuses and radiates light to the LCD panel, and a polarizing film is attached to upper and lower surfaces of the LCD panel. do.

The polarizing film is a film that can pass or block vertical or horizontal polarization of incident light, and is a thin film transistor liquid crystal display device (TFT-LCD) such as a notebook computer and a monitor, a filter for camera special effects, and a stereoscopic film. Used for glasses and the like. Although the intensity of light emitted from the backlight of the LCM board is uniform in all directions, the polarizing film transmits only the light vibrating in the same direction as the polarization axis, and absorbs or reflects the other light to create polarization in a specific direction. When the polarization passes the LCD liquid crystal, the brightness of the pixel is changed by electrically adjusting the alignment direction of the liquid crystal for each pixel.

Dust or other foreign substances are often attached to the surface of the polarizing film by static electricity, and the foreign substances of the polarizing film act as a deterioration factor of the final produced LCM board. Therefore, before attaching the polarizing film to the LCD panel, the operation of removing dust and other foreign substances present on the upper and lower surfaces of the polarizing film is performed to the polarizing film attachment unit (not shown; the portion attaching the polarizing film to the LCD panel). It must be transported and supplied.

However, in the conventional polarizing film attaching process, since the process of removing foreign matters on the upper and lower surfaces of the polarizing film is mostly performed by manual work, the work is cumbersome, unnecessary waste of manpower, and cleaning effect according to the condition and attitude of the operator The deviation was severe, and there has been a problem that it is difficult to process a large amount of water quickly. Therefore, there is an urgent need for the automation of a device for cleaning and transporting the polarizing film in order to improve work efficiency, manpower reduction, and rapid mass production and quality improvement.

The present invention was devised to solve the problems in the conventional polarizing film attaching process as described above, by automatically cleaning the upper and lower surfaces sequentially while moving the polarizing film supplied from one side in a horizontal direction continuously to the polarizing film attachment unit An object is to provide an automated polarizing film cleaning transfer device for supplying.

The objects and advantages of the present invention will be described in more detail below, and will be further embodied by the examples. Furthermore, the objects and advantages of the present invention can be realized by the means indicated in the claims and combinations thereof.

According to an aspect of the present invention, there is provided a polarizing film cleaning and conveying apparatus comprising: first horizontal conveying means for horizontally transporting a grasping polarizing film; First cleaning means for cleaning an upper surface of the polarizing film horizontally transported by the first horizontal transporting means; Second horizontal transfer means for picking up the polarized film whose upper surface is cleaned by the first cleaning means and horizontally transferring it again; And second cleaning means for cleaning a lower surface of the polarizing film picked up by the second horizontal conveying means and horizontally conveyed.

Here, the first horizontal transfer means, the servo motor; A ball screw rotated according to the driving of the servomotor; A nut block screwed to the ball screw; It is coupled to the upper portion of the nut block and comprises a polarizing film seating plate for supporting the polarizing film from below.

And, the first cleaning means, the first cleaning roller for wiping off the foreign matter adhered to the surface of the polarizing film is rotated in direct contact with the upper surface of the polarizing film is horizontally conveyed by the first horizontal transfer means; The surface is composed of a pressure-sensitive adhesive tape, the first adhesive roller is engaged with the first cleaning roller and attached to remove the foreign matter on the surface of the first cleaning roller.

Here, the first cleaning roller and the first adhesive roller are disposed adjacent to the top and bottom, and are rotatably mounted by the cleaning roller bracket and the adhesive roller bracket on both left and right sides, respectively, wherein the adhesive roller brackets on both sides are inside the cleaning roller bracket. And the lower part are interconnected by a connecting plate, which is lifted up and down by a cylinder.

And, the cylinder is fixed to the cylinder bracket arranged horizontally, the rod of the cylinder is coupled to the connecting plate, the guide post is vertically coupled to the connecting plate, the guide post is a guide hole perforated in the connecting plate It is inserted in the guide guides the linear lifting and lowering movement of the connecting plate, the elastic spring is fitted to the guide post, is configured to always press the connecting plate by the restoring force of the elastic spring, the lower end of the cleaning roller bracket Is fixedly coupled to both sides of the cylinder bracket.

On the other hand, the second horizontal transfer means, the cylinder; A pickup arm which is lifted and lowered by the cylinder and horizontally moved according to the driving of the motor; It is coupled to the pickup arm includes an adsorption plate for holding and holding the polarizing film.

And, the second cleaning means, the second cleaning roller for wiping off the foreign matter attached to the surface of the polarizing film as it is rotated in direct contact with the lower surface of the polarizing film horizontally conveyed by the second horizontal transfer means; The surface is composed of a pressure-sensitive adhesive tape, and includes a second adhesive roller that is engaged with the second cleaning roller to attach and remove foreign substances on the surface of the second cleaning roller.

On the other hand, it is preferable to further include a polarizing film alignment transfer means for horizontally conveying by rotating and aligning the polarizing film transferred by the second horizontal transfer means.

Here, the polarizing film alignment transfer means, the polarizing film seating plate for the adsorption support of the polarizing film supplied from the second horizontal transfer means from below; It is arranged perpendicular to the two neighboring sides forming the corners of one side of the polarizing film seating plate, and pushes the two neighboring sides of one side of the polarizing film supported on the polarizing film seating plate while reciprocating in the X-axis and Y-axis directions, respectively. A first pushing member and a second pushing member for centering the polarizing film; A cylinder for reciprocating each of the first and second pushing members; A rotary cylinder rotating the polarizing film seating plate at an angle; An intermediate plate for supporting the cylinder and the rotary cylinder from below; An elevating driving means provided in the lower portion of the intermediate plate to raise and lower the intermediate plate; A base plate supporting the elevating driving means at a lower portion thereof; A support rod for supporting the intermediate plate spaced apart from the base plate at a predetermined height; And a third horizontal transfer means for horizontally moving the base plate to supply the polarized film adsorbed and supported by the polarizing film seating plate to the polarizing film rotational transfer unit.

Here, the elevating driving means, the elevating cylinder arranged horizontally on the lower portion of the intermediate plate; A block body having an inclined surface having a lower upper surface one side and a higher other side, the inclined cam linearly moving in a horizontal direction by the elevating cylinder; And a cam follower for moving up and down the intermediate plate by moving along the inclined surface of the inclined cam during horizontal movement of the inclined cam.

According to the present invention as described above, by transporting the polarizing film in the horizontal direction and at the same time automatically cleaning the upper and lower surfaces to supply to the polarizing film attachment unit, it is possible to increase the work efficiency, reduce manpower and rapid mass production, and quality Has an excellent effect of achieving an improvement.

Hereinafter, the specific configuration of the polarizing film cleaning transfer device according to the present invention will be described in detail with reference to the preferred embodiments and the accompanying drawings.

1 is a perspective view of a polarizing film cleaning transfer apparatus according to the present invention, Figure 2 is an exploded perspective view of the first cleaning means of the polarizing film cleaning transfer apparatus according to the present invention, Figure 3 is a polarizing film cleaning transfer apparatus according to the present invention 4 is a perspective view of the polarizing film alignment transfer means of the polarizing film cleaning transfer apparatus according to the present invention.

The polarizing film cleaning transfer device, one side, more specifically, the polarizing film attachment unit after cleaning the upper and lower surfaces of the polarizing film supplied from a polarizing film loading unit (not shown) separately provided on the outside or manually supplied by an operator As shown in FIG. 1, the first horizontal transfer means 100, the first cleaning means 110, the second horizontal transfer means 120, and the second cleaning means (not shown) are conveyed and supplied to (not shown). 130, and a polarizing film alignment transfer means 140.

The first horizontal transfer means 100 is a portion for absorbing and holding the polarizing film supplied from one side to horizontally transfer the first cleaning means 110, as shown in Figure 1, the servo motor 101 and the The ball screw 102 rotates according to the driving of the servomotor 101, the nut block 103 screwed to the ball screw 102, and the polarizer film coupled to an upper portion of the nut block 103. And a polarizing film seating plate 104 which is supported by suction.

Through this configuration, the ball screw 102 is rotated according to the driving of the servomotor 101 so that the nut block 103 is horizontally moved along the ball screw 102 and the polarizing film coupled to the nut block 103. The seating plate 104 is horizontally moved so that the vacuum-adsorbed polarizing film is horizontally transferred onto the polarizing film seating plate 104.

The first cleaning means 110 is a portion for cleaning the upper surface of the polarizing film horizontally transported by the first horizontal transfer means 100 to remove foreign substances, the first cleaning roller 111 and the first adhesive roller 113. ).

The first cleaning roller 111 is attached to the surface of the polarizing film as the first cleaning roller 111 is rotated in direct contact with the upper surface of the polarizing film which is adsorbed and supported on the polarizing film seating plate 104 of the first horizontal conveying means 100 and is horizontally conveyed. Wipe off the foreign matter, the first adhesive roller 113 is composed of an adhesive tape to the surface of the first cleaning roller 111 is engaged with the first cleaning roller 111 to remove and remove the foreign matter attached to the surface , The foreign matter remains on the first cleaning roller 111 is configured to prevent the foreign matter is attached to the surface of the other polarizing film.

On the other hand, the first adhesive roller 113 is preferably configured to be capable of lifting and lowering to press the first cleaning roller 111 in order to effectively remove the foreign matter attached to the first cleaning roller 111. 2 is an exploded perspective view showing the detailed configuration of the first cleaning means 110 to enable such a lifting movement. However, as shown in FIG. 1, the first washing water stage 110 is disposed such that the first cleaning roller 111 faces downward, but in FIG. 2, the first cleaning roller 111 is provided for convenience of description. It is shown to face upward.

As shown in FIG. 2, the first cleaning roller 111 and the first adhesive roller 113 are disposed to be adjacent to each other up and down, respectively, by the cleaning roller bracket 112 and the adhesive roller bracket 114 on both sides. While rotatably mounted, the adhesive roller brackets 114 on both sides are located inside the cleaning roller bracket 112 and the lower parts thereof are connected to each other by the connecting plate 115.

On the other hand, the connecting plate 115 is raised and lowered by the cylinder 117. The cylinder 117 is fixed to the cylinder bracket 118 arranged horizontally, the rod of the cylinder 117 is coupled to the connecting plate 115. In addition, a guide post 119 is vertically coupled to the connecting plate 115, and the guide post 119 is fitted into the guide hole 116 drilled into the connecting plate 115, and is connected by the operation of the cylinder 117. The linear elevating movement of the plate 115 is guided.

The cylinder 117 is spaced apart so that the first cleaning roller 111 and the first adhesive roller 113 are not in contact with each other. This is because when the first cleaning roller 111 and the first adhesive roller 113 are always in contact with each other, the adhesive force of the first adhesive roller 113 may be lowered. Accordingly, the cylinder 117 is contracted in a normal manner so that the first adhesive roller 113 is spaced apart from the first cleaning roller 111, and when the cleaning is performed, the cylinder 117 is expanded to press the first adhesive roller 113. The first adhesive roller 113 is in contact with the first cleaning roller 112 to remove the foreign matter attached to the first cleaning roller 111.

An elastic spring 119a is fitted to the guide post 119. The elastic spring 119a serves to provide a restoring force when the height of the first cleaning roller 111 and the first adhesive roller 113 is adjusted by the micrometer head MH as the tension spring. On the other hand, the lower end of the cleaning roller bracket 112 is fixedly coupled to both sides of the cylinder bracket (118).

Through this configuration, the first cleaning roller 111 cleans the upper surface of the polarizing film, and the first adhesive roller 113 is rotated while pressing the first cleaning roller 111 to the first cleaning roller 111. It is possible to effectively remove the foreign matter attached.

The polarizing film whose upper surface is cleaned by the first cleaning means 110 is picked up by the second horizontal transfer means 120 and is horizontally transported again. The second horizontal transfer means 120, as shown in Figure 1, is a conventional pickup and place device, the pick-up arm 122 is raised and lowered by the cylinder 126, and by a linear motor or a ball screw It is horizontally moved, the pick-up arm 122 is provided with a suction plate 124 to pick up the polarizing film located on the polarizing film seating plate 104 to transport horizontally. The configuration of the second horizontal transfer means 120 is a configuration of a conventional horizontal transfer device, and further description thereof will be omitted.

The lower surface of the polarizing film conveyed by the second horizontal transfer means 120 is cleaned by the second cleaning means 130. As shown in FIG. 1, the second cleaning means 130 is disposed in a state in which the upper and lower positions are inverted from the first cleaning means 110, and the detailed configuration thereof is the same. That is, the second cleaning means 130, the second cleaning to wipe off the foreign matter attached to the surface of the polarizing film as it is rotated in direct contact with the lower surface of the polarizing film horizontally transported by the second horizontal transfer means 120 The roller 131 includes a second adhesive roller 132, the surface of which is formed of an adhesive tape and engaged with the second cleaning roller 131 to remove and remove foreign substances on the surface of the second cleaning roller 131. Through this configuration, the second cleaning means 130 cleans the lower surface of the polarizing film picked up by the suction plate 124 of the second horizontal transfer means 120 and horizontally transferred.

The polarizing film whose lower surface is cleaned by the second cleaning means 130 is supplied to the polarizing film alignment and transfer means 140 located at the distal end of the second horizontal transfer means 120. The polarizing film sorting transfer means 140 is a portion that is rotated by a predetermined angle by receiving the polarized film transferred by the second horizontal transfer means 120, and then transferred to the polarizing film attaching unit, the polarizing film attaching unit Means for aligning the polarizing film to match the orientation with the polarizing film adsorption means (not shown) provided in. 3 is a perspective view of the polarization film alignment and transfer means 140 is shown, Figure 4 is an exploded perspective view of the polarization film alignment and transfer means 140 is shown.

As shown, the polarizing film alignment transfer means 140 is a polarizing film seating plate 141, the first pushing member 142, the second pushing member 143, the rotary cylinder 144, the intermediate plate 145 , Lifting driving means 146, the base plate 149, and the third horizontal transfer means 150.

The polarizing film seating plate 141 is to support and support the polarizing film supplied from the second horizontal transfer means 120 from below, and is generally composed of a rectangular plate member.

The first pushing member 142 and the second pushing member 143 are arranged perpendicular to each other at two neighboring sides forming corners of one side of the polarizing film seating plate 141. The first pushing member 142 and the second pushing member 143 are adjacent to each other on one side of the polarizing film supported by the polarizing film seat plate 141 while reciprocating in the X- and Y-axis directions by high pressure air, respectively. Push the sides to center the polarizing film.

The first pushing member 142 and the second pushing member 143 are pushing bars 142a and 143a for pressing the X and Y axis sides of the polarizing film to align the X and Y directions of the polarizing film, respectively. Vertical brackets 142b and 143b for supporting the pushing bars 142a and 143a from below are provided. The vertical brackets 142b and 143b are installed on the intermediate plate 145 which is spaced apart from the base plate 149 by a spacer 148 at a predetermined height below the polarizing film seating plate 141. According to the operation of 142c, 143c) to press the polarizing film in the X, Y-axis direction, respectively. To this end, the rod ends of the cylinders 142c and 143c are fixedly coupled to the lower portions of the vertical brackets 142b and 143b of the first and second pushing members 142 and 143, respectively.

In the center of the intermediate plate 145 is also provided a rotary cylinder 144. The rotary cylinder 144 is to convert the linear motion into a rotary motion by the operation of the built-in rack pinion gear in accordance with the air supply, and the orientation of the polarizing film adsorption means (not shown) of the polarizing film attachment unit located in the upper portion It is a portion that is rotationally aligned at an angle, preferably about 30 °, to match.

Below the intermediate plate 145 is provided with elevating driving means 146 for elevating the components supported by the intermediate plate 145 and the intermediate plate 145 including the polarizing film seating plate 141. do. The lifting driving means 146 includes a lifting cylinder 146a, an inclined cam 146b, and a cam follower 146c.

The lifting cylinder 146a is an air cylinder in which a rod is horizontally arranged in the lower portion of the intermediate plate 145. The lifting cylinder 146a is spaced apart from the lower portion of the intermediate plate 145 by a spacer 148. It is attached to the supporting base plate 149.

The inclined cam 146b converts a horizontal linear motion into a vertical linear motion. The inclined cam 146b is a block having a lower surface on one side and a high inclined surface on the other side. The inclined cam 146b linearly moves in the horizontal direction by the lifting cylinder 146a.

The cam follower 146c moves along the inclined surface of the inclined cam 146b during the horizontal movement of the inclined cam 146b. As shown in FIG. 4, the cam follower 146c is fixedly mounted below the intermediate plate 145. A protrusion MT and a bolt BT coupled to a lower end of the mounting protrusion MT are included. On the other hand, it is also preferable to have a roller rotatably coupled to the mounting projection (MT) instead of the bolt (BT).

The LM block 146d is coupled to the lower portion of the inclined cam 146b, and the base plate 149 is provided with an LM rail 146e to guide stable horizontal linear motion of the inclined cam 146b. Do.

Through this configuration, when the lifting cylinder 146a expands and operates, the inclined cam 146b moves horizontally and linearly, and the cam follower 146c, specifically, a bolt or roller, moves the inclined surface of the inclined cam 146b. The components supported by the upper portion of the intermediate plate 145 including the intermediate plate 145 and the polarizing film seating plate 141 are moved up and down. Accordingly, the polarizing film seated on the polarizing film seating plate 141 is raised in accordance with the operation of the elevating cylinder 146a and transferred to the polarizing film adsorption means of the polarizing film attaching unit positioned on the upper side.

Meanwhile, the third horizontal transfer means 150 horizontally moves the base plate 149 according to the driving of the motor 152, and horizontally moves the polarizing film adsorbed and supported on the polarizing film seating plate 141 to the polarizing film attachment unit. Feed it. The third horizontal transfer means 150 is a conventional horizontal transfer means using a motor, a ball screw, or a linear motor.

Through this configuration, the polarizing film is centered and aligned by the first pushing member 142 and the second pushing member 143, and the polarizing film is rotated by a predetermined angle by the operation of the rotary cylinder 144, and then It is delivered to the polarizing film attachment unit by the three horizontal transfer means 150, the cleaned polarizing film is attached to the LCD panel.

So far, the polarizing film cleaning and transporting apparatus according to the present invention has been described with reference to the preferred embodiment, but various modifications can be made by a simple modification and modification of the configuration within a range without departing from the technical spirit of the present invention. As will be apparent, the scope of the present invention is not limited to these embodiments, but includes the scope substantially equivalent to the embodiments of the present invention.

1 is a perspective view of a polarizing film cleaning transfer device according to the present invention,

Figure 2 is an exploded perspective view of the first cleaning means of the polarizing film cleaning transfer device according to the present invention,

Figure 3 is a perspective view of the polarizing film alignment transfer means of the polarizing film cleaning transfer apparatus according to the present invention,

4 is an exploded perspective view of the polarizing film alignment transfer means.

Explanation of symbols on the main parts of the drawings

100: first horizontal transfer means 101: servo motor

102: ball screw 103: nut block

104: polarizing film seating plate 110: first cleaning means

111: first cleaning roller 112: cleaning roller bracket

113: first adhesive roller 114: adhesive roller bracket

115: connecting plate 116: guide hole

117: cylinder 118: cylinder bracket

119: guide post 119a: elastic spring

120: second horizontal transfer means 122: pickup arm

124: adsorption plate 126: cylinder

130: second cleaning means 131: second cleaning roller

132: second adhesive roller 140: polarizing film alignment transfer means

141: polarizing film seating plate 142: first pushing member

142a, 143a: Pushing bar 142b, 143b: Vertical bracket

142c and 143c: Cylinder 143: Second pushing member

144: rotary cylinder 145: intermediate plate

146: lifting drive means 146a: lifting cylinder

146b: Inclined Cam 146c: Camp Follower

146d: LM block 146e: LM rail

148: spacer 149: base plate

150: third horizontal transfer means 152: motor

Claims (10)

First horizontal transfer means for absorbing and holding the polarizing film for horizontal transfer; First cleaning means for cleaning an upper surface of the polarizing film horizontally transported by the first horizontal transporting means; Second horizontal transfer means for picking up the polarized film whose upper surface is cleaned by the first cleaning means and horizontally transferring it again; And a second cleaning means for cleaning the lower surface of the polarizing film picked up by the second horizontal conveying means and horizontally conveyed. The method of claim 1, The first horizontal transfer means, A servo motor; A ball screw rotated according to the driving of the servomotor; A nut block screwed to the ball screw; And a polarizing film seating plate coupled to an upper portion of the nut block and supporting the polarizing film from below. The method according to claim 1 or 2, The first cleaning means, A first cleaning roller which wipes the foreign matter adhered to the surface of the polarizing film as the first horizontal conveying means is rotated in direct contact with the upper surface of the polarizing film which is horizontally conveyed; And a first adhesive roller having a surface formed of an adhesive tape and engaged with the first cleaning roller to attach and remove foreign substances from the surface of the first cleaning roller. The method of claim 3, wherein The first cleaning roller and the first adhesive roller are disposed up and down adjacent to each other, and are rotatably mounted by the cleaning roller bracket and the adhesive roller bracket on both the left and right sides thereof, and the adhesive roller brackets on both sides are positioned inside the cleaning roller bracket. And the lower part is interconnected by a connecting plate, and the connecting plate is lifted up and down by a cylinder. The method of claim 4, wherein The cylinder is fixedly installed in the horizontally arranged cylinder bracket, the rod of the cylinder is coupled to the connecting plate, the guide post is vertically coupled to the connecting plate, the guide post is inserted into the guide hole drilled in the connecting plate Guides the linear lifting and lowering movement of the connecting plate by the cylinder operation, the guide post is fitted with an elastic spring and the lower end of the cleaning roller bracket is fixed to both sides of the cylinder bracket, characterized in that the cleaning film transport device . The method according to claim 1 or 2, The second horizontal transfer means, A cylinder; A pickup arm which is lifted and lowered by the cylinder and horizontally moved according to the driving of the motor; And a suction plate coupled to the pickup arm to absorb and grip the polarizing film. The method according to claim 1 or 2, The second cleaning means, A second cleaning roller for wiping off foreign matter adhered to the surface of the polarizing film as the second horizontal conveying means is rotated in direct contact with the lower surface of the polarizing film horizontally transported by the second horizontal conveying means; And a second adhesive roller having a surface formed of an adhesive tape and engaged with the second cleaning roller to remove and remove foreign substances from the surface of the second cleaning roller. The method of claim 1, And a polarizing film alignment transfer means for rotating and aligning the polarizing film transferred by the second horizontal transfer means to horizontally transfer the polarizing film. The method of claim 8, The polarizing film alignment transfer means, A polarizing film seating plate which adsorbs and supports the polarizing film supplied from the second horizontal conveying means from below; It is arranged perpendicular to the two neighboring sides forming the corners of one side of the polarizing film seating plate, and pushes the two neighboring sides of one side of the polarizing film supported on the polarizing film seating plate while reciprocating in the X-axis and Y-axis directions, respectively. A first pushing member and a second pushing member for centering the polarizing film; A cylinder for reciprocating each of the first and second pushing members; A rotary cylinder rotating the polarizing film seating plate at an angle; An intermediate plate for supporting the cylinder and the rotary cylinder from below; An elevating driving means provided in the lower portion of the intermediate plate to move the intermediate plate up and down; A base plate supporting the elevating driving means at a lower portion thereof; A support rod for supporting the intermediate plate spaced apart from the base plate at a predetermined height; And a third horizontal transfer means for horizontally moving the base plate to supply the polarized film adsorbed and supported by the polarizing film seating plate to the polarizing film rotational transfer unit. The method of claim 9, The lifting driving means, A lifting cylinder arranged horizontally under the intermediate plate; A block body having an inclined surface having a lower upper surface one side and a higher other side, the inclined cam linearly moving in a horizontal direction by the elevating cylinder; And a cam follower for moving up and down the intermediate plate by moving along the inclined surface of the inclined cam during horizontal movement of the inclined cam.

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