JP3552444B2 - Screen door meshing equipment - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a screen-screening device used to spread an insect-proof screen on a screen-door frame, and in particular, continuously connects a screen-holding rope together with an insect-proof net to a screen-receiving groove provided in the screen-door frame without human intervention. The present invention relates to a netting device that can be press-fitted into a net.
[0002]
[Prior art]
The screen door is formed by, for example, attaching an insect-proof net made of, for example, polyvinyl chloride resin to a frame made of an extruded profile of an aluminum alloy. And a rubber net holding rope is pushed into the net receiving groove formed along the inner peripheral portion of the frame together with the insect net.
[0003]
Conventionally, such screen-screening work has been performed manually, and there is no deformation of the screen frame due to excessive tension of the insect-controlling net, and considerable skill and skill are required to stretch the insect-controlling net without bending. For example, Japanese Patent Application Laid-Open No. 6-257358 discloses a device for stretching insect screens for screen doors that automates the work of inserting a bead (net holding rope) and increases the efficiency of the mesh attaching operation. It has been disclosed.
[0004]
[Problems to be solved by the invention]
However, the insect repelling net stretching device described in the above publication provides a moving body that reciprocates in the left-right direction along a moving frame that reciprocates in the front-rear direction on a support that fixes the screen frame. By providing a pushing roller for fitting the net holding rope into the moving body, the work of inserting the net holding rope is automated, but at the start of the fitting work, the starting end of the net holding rope is inserted into the net receiving groove. Since the press-fitting work must be performed manually, it cannot be applied to a fully automatic netting device, and the press-fitting work of such a net holding rope into the net receiving groove is assisted without relying on humans. The development of a screen-screening device that can be performed has been an issue in fully automating the screen-screening work.
[0005]
[Object of the invention]
The present invention has been made in view of the above-described problems in the conventional screen-closing apparatus, and is performed manually from the start of press-fitting of the net holding rope, the cutting after press-fitting, and the preparation for press-fitting to the next frame. It is an object of the present invention to provide a screen-screening device that can be automatically and continuously performed without the need for a screen.
[0006]
[Means for Solving the Problems]
The screen door meshing device according to the first aspect of the present invention is capable of vertically moving while pressing relative to the screen frame, press-fitting a continuously supplied screen holding rope into the screen receiving groove of the screen frame together with the insect net. A press-fit roller and a cutter that separates the press-fitted portion of the net holding rope, Rotatably supported on the shaft of the press-fit roller, A rope winding arm that pinches and rotates the net holding rope separated from the press-fitted part, and moves the held net holding rope along the outer peripheral surface of the press-fit roller. When It is characterized by having a configuration provided with the above-mentioned configuration, and the configuration of such a screen-closing device for screen doors is a means for solving the above-mentioned conventional problems.
[0007]
According to the screen door netting device according to the second aspect of the present invention, the screen holding rope continuously supplied is press-fitted together with the insect net into the screen receiving groove of the screen frame while moving relative to the screen frame. A press-fit roller, Supported rotatably on the shaft of the press-fit roller, and Separate the press-fitted part of the net holding rope Having a cutter, A rope winding arm that pinches and rotates the net holding rope separated from the press-fitted part, and moves the held net holding rope along the outer peripheral surface of the press-fit roller. When It is characterized by having a configuration provided with the above-mentioned configuration, and the configuration of such a screen-closing device for screen doors is a means for solving the above-mentioned conventional problems.
[0009]
Effect of the Invention
According to a first aspect of the present invention, there is provided a screen door meshing apparatus, comprising: a press-fit roller capable of moving up and down; a cutter; When When the press-in roller moves relative to the screen frame, the screen-holding rope is continuously supplied, and the screen-holding rope and the insect-preventing net are pressed into the screen receiving grooves provided in the screen-door frame. Progress I do. When the press-fitting of the net holding rope into the first net receiving groove is completed, the press-fitted portion of the net holding rope is separated by the cutter, and the rope winding arm is separated from the press-fitted portion of the net holding rope. The front end portion is pinched and rotated to the opposite side with respect to the press-fit roller, whereby the net holding rope is wound around the press-fit roller outer peripheral surface. Further, after the net holding rope is pressed into the net receiving groove of the next door frame, which is a subsequent work, by a press-fit roller, the tip is released from the rope winding arm, and the rope winding arm rotates by 180 °. To return to the original position. Therefore, a series of operations from the start of press-fitting of the net holding rope into the first net receiving groove, the end of press-fitting, and the preparation for press-fitting the net holding rope into the net receiving groove of the next screen door frame are automatically performed without interruption. Will be
[0011]
The screen door meshing device according to claim 2 of the present invention includes a press-fit roller and a rope winding arm, and the rope winding arm has a function of separating the press-fitted portion of the net holding rope. A series of operations from the start of press-fitting of the net holding rope, the end of press-fitting, and the preparation of press-fitting of the net holding rope into the next mesh receiving groove are automatically performed without interruption, and Since there is no need to separately provide a cutter for cutting the holding rope, the structure of the netting device is compact.
[0014]
【Example】
Hereinafter, the present invention will be specifically described with reference to the drawings.
[0015]
FIGS. 1 to 7 show an embodiment of a screen-closing device according to the present invention, and FIG. 2 is a plan view showing the entire structure thereof.
[0016]
The screen netting apparatus 1 shown in FIG. 2 includes an apparatus base 2 having an L-shape. The apparatus base 2 holds a work carried in from the upper left in the figure, that is, a screen frame F on its left and right sides. A first conveyor 3a which is transported in the horizontal direction in the figure parallel to the frames F1 and F2, and a horizontal frame F3 of the screen frame F which has been moved to a predetermined position by the first conveyor 3a are clamped and further transported in the same direction. A first work carrier 3b, a second conveyor 4a for transferring the screen frame F, which has been moved to a predetermined position by the work carrier 3b, in a vertical direction in the drawing parallel to the upper and lower horizontal frames F3, F4, and a second conveyor 4a. The second work carrier 4b that clamps the vertical frame F2 of the screen door frame F that has been moved to the predetermined position and further transfers the same in the same direction, and the screen door frame that has been moved to the predetermined position by the second work carrier 4b. The beam F is transported further in the same direction, the third conveyor 4c dispensing the finished screens to the next step is disposed.
[0017]
In the middle of the horizontal transport path composed of the conveyor 3a and the work carrier 3b, a polychlorinated vinyl Supply device 5 for covering the insect screen N made of metal on the screen frame, and a first net fixing device 6 provided on both sides with a net holding rope R wound on a drum D is provided by the net supply device 5. It is provided adjacent to the downstream side in the work moving direction.
[0018]
The gate-type frame 6a of the first net fixing device 6 constitutes a part of the net feeding device 5, and is moved up and down and back and forth by two cylinders 20 and 21, respectively, as described later. A net mounting mechanism 12 composed of a pair of arms 22 that grips the tip of the insect repellent net N fed from the net feeding mechanism 11 of the device 5 is provided.
[0019]
Further, in the middle of the vertical conveying path in the figure, which includes the second conveyor 4a, the second work carrier 4b, and the third conveyor 4c, First A second net fixing device 7 having a structure similar to that of the net fixing device 6 and having a net holding rope R wound on the drum D on both sides is used to move the net holding rope R from the second conveyor 4a to the second work carrier 4b. It is provided in the vicinity of the delivery part.
[0020]
A slide base 8a slidably supports a corner holding mechanism 23 and a corner cutter 24, which will be described later, in the middle of the vertical transport path in the figure and downstream of the second mesh fixing device 7. , 8a on both sides are provided with a corner processing device 9 composed of two portal frames 8, 8, respectively.
[0021]
FIG. 3 is a side view showing in detail the structures of the net supply device 5 and the first net fixing device 6 shown in FIG.
[0022]
As shown in FIG. 3, the net supply device 5 is attached to a portal frame 5a provided so as to straddle the conveyor 3a, and includes a motor 11a and a supply roller 11b which is rotationally driven by the motor 11a. A net feeding mechanism 11 that feeds out the tip of the insect net N that is wound in a roll and rotatably mounted on the support base 10 by the rotation of the motor 11a and the supply roller 11b, and a first net fixing device. 6 is moved up and down and back and forth by a vertical cylinder 20 attached to the portal frame 6a of FIG. 6 and a horizontal cylinder 21 attached to the tip of a cylinder rod 20a of the vertical cylinder 20, and the insect net N fed out from the net feeding mechanism 11. A net mounting mechanism 12 composed of a pair of arms 22 for gripping the front end of the frame and covering the screen frame F, and moving up and down on the portal frame 5a. Attached to, and a net cutting mechanism 13 comprising a mesh cutter 13a and the cutter receiving 13b for cutting the insect screen N which is placed over the screen door frame F at a predetermined position.
[0023]
Further, the net supplying device 5 includes a net holding roller 14a disposed on the portal frame 5a so as to be able to move up and down, and an adjusting bar 14b attached to a position below the portal frame 5a so as to be able to move up and down and slide in the left-right direction. In addition, by adjusting the adjustment bar 14b up and down, the tension of the insect screen N attached to the screen door frame F is adjusted to prevent deformation of the screen door frame F and loosening of the insect screen N.
[0024]
The first net fixing device 6 includes the rotary drum D around which the net holding rope R is wound on both sides of the portal frame 6a provided so as to straddle the first conveyor 3a and the first work carrier 3b as described above. At the same time, rope guides 16 which are respectively raised and lowered by cylinders 15 attached to both sides of the gate type frame 6a are provided at the left and right positions, and the net holding ropes R are simultaneously pressed into the net receiving grooves of the left and right vertical frames F1 and F2 of the screen door frame F. It has become. The left and right rope guides 16 are movably mounted along the portal frame 6a, respectively, and correspond to the size of the screen frame F.
[0025]
As shown in FIG. 1 (a), the rope guide 16 winds a net holding rope R drawn out from the rotary drum D and press-fits it into the net receiving grooves G of the left and right vertical frames F1 and F2; this Press fit A rope winding arm 18 rotatably supported on the shaft of the roller 17 is provided. Further, the rope guide 16 was heated by an electric heater on the downstream side of the press-fit roller 17 in the work moving direction, and was pressed into the net receiving grooves of the frames F1 and F2 together with the net holding rope R. Insect net The extra end of N is outside the net receiving groove along the vertical frames F1 and F2. Fusing A heat cutter 19 is provided.
[0026]
The rope winding arm 18 is moved between a position indicated by a solid line and an imaginary line in FIG. 1A by a pulley 16a and a belt 16b which are rotationally driven by a servo motor housed in the rope guide 16. As shown in FIG. 1 (b), the arm 18a has a substantially L-shaped arm body 18a and a U-shaped groove 18d formed in the arm body 18a. Is configured by a slider 18c that slides by the operation of.
[0027]
The arm main body 18a is provided with a U-shaped guide groove (guide portion) 18e connected to the U-shaped groove 18d in the vertical direction in the drawing, and the mesh holding rope R is passed through the guide groove 18e so as to connect the screen holding rope R to the screen door. The frame F is guided to the net receiving groove G. On the other hand, the slider 18c has a cutter blade (cutter) 18f crossing the guide groove 18e, and has a clamp portion 18g protruding above the cutter blade 18f toward the guide groove 18e side from a lower portion of the cutter blade 18f in the drawing. The net holding rope R received in the guide groove 18e is cut by the operation of the cylinder 18b, and the cut end of the net holding rope R is held between the side wall of the guide groove 18e and the clamp portion 18g. It is a mechanism that can do it.
[0028]
4A to 4D are explanatory diagrams sequentially showing the operation of the rope winding arm 18. FIG. 4A shows press-fitting of the net holding rope R into the net receiving groove G of the screen door frame F. Indicates a finished state.
[0029]
That is, as shown in FIG. 4A, when the screen door frame F moves and reaches the vicinity of the end of the screen receiving groove G, as shown in FIG. 4B, the slider 18c based on the retracting operation of the cylinder 18b. The sliding of the net holding rope R is cut by the cutter blade 18f, and the end of the press-fitted portion of the net holding rope R, which is one of the separated ends, falls onto the net receiving groove G and is pressed into The other end of the net holding rope R separated from the finished portion is held between the clamp portion 18g of the slider 18c and the guide groove 18e of the rope winding arm 18. At this time, if necessary, it is also desirable to attach an elastic body made of a spring, rubber, foamed resin material, or the like to the contact surface of the clamp portion 18g with the net holding rope R, whereby the dimensional variation of the net holding rope R is changed. Can be widened.
[0030]
Next, the rope winding arm 18 clamps the leading end of the net holding rope R by the rotation of the servomotor transmitted via the belt 16b until the rope guide 16 moves up and the subsequent work is transferred. In this state, it rotates 180 ° in the counterclockwise direction, whereby the net holding rope R is wound about one third of the way along the outer peripheral surface of the press-fit roller 17 as shown in FIG.
[0031]
Then, the screen door frame F, which is the subsequent work, moves Predetermined When it reaches the position, the press-fit roller 17 descends together with the rope guide 16 based on the pushing operation of the cylinder 15, so that the net holding rope R is over the insect-preventing net N as shown in FIG. Pressed into. After the net holding rope R is press-fitted into the net receiving groove G, the cylinder holding member R is pushed out by the pushing operation of the cylinder 18b. tip The part is released from the rope winding arm 18.
[0032]
The rope winding arm 18 that has released the clamp of the net holding rope R by the pushing operation of the cylinder 18b is attached to the belt 16b. So anti Rotated clockwise by 180 °, as shown in FIG. position And the net holding rope R is received in the guide groove 18e. Then, as the work, that is, the screen door frame F moves rightward in the drawing, the press-fitting of the screen holding rope R proceeds.
[0033]
At this time, the end portion and the start end of the net holding rope R are not completely inserted into the net receiving groove G as shown in FIG. The press-fitting of the starting end is performed by the corner pressing mechanism 23 of the corner processing device 9 as described later.
[0034]
FIG. 5A is a diagram showing the progress of the press-fitting of the net holding rope R into the net receiving groove G by the press-fitting roller 17. As shown in FIG. 5B, the heat cutter 19 disposed on the side cuts off the portion that has been fitted into the net receiving groove G by thermal fusing. FIG. 5 (a) shows only one of the opposing frame members of the screen door frame F, and it goes without saying that the press-in of the net holding rope R is performed simultaneously on the other frame member. .
[0035]
Further, the heat cutter 19 is heated to about 210 ° C., which is slightly higher than the melting point of the polyvinyl chloride resin, which is a material of the insect repellent net N, by an electric heater (not shown). It is melted by softening and melting.
[0036]
The second net fixing device 7 shown in FIG. 2 has a structure similar to that of the first net fixing device 6, and is press-fitted as shown in FIG. roller Rope guide with 17 and rope winding arm 18 16 to that With both sides, equipped with a similar heat cutter, Screen frame The surplus end portion of the insect repellent net N pressed into the net receiving grooves of the side frames F3 and F4 together with the net holding rope R is thermally blown along the side frames F3 and F4 outside the net receiving grooves. .
[0037]
The corner processing device 9 shown in FIG. 2 is such that the portal frames 8 as shown in FIG. 6 are arranged back to back, and a cylinder 23a and a cylinder 23a are provided at both ends of each portal frame 8. A corner holding mechanism 23 provided with a corner holding jig 23b that moves up and down by a cylinder 23a, and a slide base 8a that slidably holds a corner cutter 24 that moves up and down by a cylinder 24a.
[0038]
The corner holding jig 23b of the corner holding mechanism 23 has an L-shaped cross section corresponding to the shape of the corner portion of the screen door frame F, and the first and second mesh fixing devices 6 are pushed by the pushing operation of the cylinder 23a. And a function of press-fitting the terminal end and the start end of the net holding rope R, which could not be inserted by the press-fit rollers 17 of FIG.
[0039]
On the other hand, similarly to the heat cutter 19, the corner cutter 24 is heated to about 210 ° C. by an electric heater (not shown), and as shown in FIG. 7, a heat cutter 24e that moves up and down and back and forth by cylinders 24c and 24d, A heat insulating material 24f for protecting the insect screen N stretched on the screen door frame F from heat of the heat cutter 24e, and as shown in FIGS. 7B to 7D, the first operation is performed by pushing out the cylinders 24c and 24d. And a function of fusing the remaining uncut corners of the insect repellent net N by the heat cutter provided in the second net fixing devices 6 and 7.
[0040]
In the following, the operation of the screen covering apparatus 1 having such a structure will be briefly described.
[0041]
First, when the screen frame F, which is a work, is carried in from the upper left of the apparatus base 2 shown in FIG. The frame F is guided to a predetermined position while being corrected so that the directions of the vertical frames F1 and F2 coincide with the traveling direction.
[0042]
Then, when the screen door frame F reaches a predetermined position, the horizontal frame F3 of the screen door frame F is clamped by the clamper 3c of the first work carrier 3b and sent out by the screen feeding mechanism 11 of the screen supply device 5. The tip of the insect repellent net N is gripped by the arm 22 of the net mounting mechanism 12 and is overlaid on the screen frame F by the operation of the cylinders 20 and 21.
[0043]
Next, together with the rope guide 16 of the first net fixing device 6, the press-fit roller 17 around which the net holding rope R is wound down as shown in FIG. As described above, the net holding rope R is pressed into the net receiving groove G of the vertical frames F1 and F2 together with the insect net N. At this time, the adjustment bar 14b is interposed between the insect net N and the screen door frame F, so that the insect net N is given an appropriate bending. This deflection is balanced with the length dimension drawn into the net receiving groove G of the frame member, so that the net door frame F is not deformed.
[0044]
When the tip of the insect repellent net N is fixed to the screen frame F, the arm 22 of the net mounting mechanism 12 is raised by the retracting operation of the cylinder 20.
[0045]
Further, after the starting end of the net holding rope R is released from the rope winding arm 18 by the pushing operation of the cylinder 18b of the rope winding arm 18, the rope winding arm 18 is rotated by the rotation of the servo motor of the rope guide 16 in the figure. Rotating in the counterclockwise direction, it moves to the position shown in FIG. 4A, and the net holding rope R is received in the guide groove 18e.
[0046]
Next, the screen door frame F moves together with the insect repellent net N by the operation of the first work carrier 3b, and accordingly, as shown in FIG. Removal proceeds. When the screen door frame F moves and the insect repellent net N having a length corresponding to the size of the frame F is drawn out, the net cutting mechanism 13 operates to cut the insect repellent net N.
[0047]
When the ends of the vertical frames F1 and F2 reach the press-fitting rollers 17 by the movement of the screen door frame F, the press-fitting of the net holding rope R is performed by the operation of the cylinder 18b of the rope winding arm 18 as shown in FIG. After the finished portion is separated, the rope guide 16 of the first net fixing device 6 rises, and the net holding rope R is press-fitted by the rotation of the rope winding arm 18 as shown in FIG. It is wound around the roller 17 to prepare for carrying in a subsequent work.
[0048]
When the rope guide 16 of the first net fixing device 6 rises, the clamp of the horizontal frame F3 by the clamper 3c of the first work carrier 3b is released, and the insect net N and the net are inserted into the net receiving grooves G of the vertical frames F1 and F2. The screen door frame F into which the presser ropes R have been press-fitted is transported by the second conveyor 4a in a direction parallel to the horizontal frames F3 and F4.
[0049]
When the screen door frame F reaches a predetermined position, the vertical frame F2 of the screen door frame F is clamped by the clamper 4d of the second work carrier 4b, which is exactly the same as the press-fitting of the screen holding rope R into the vertical frames F1 and F2. According to the procedure, the press-fitting of the net holding rope R into the net receiving grooves G of the side frames F3 and F4 is started by the second net fixing device 7, and as in FIG. The fusing of the net N proceeds, and the surplus portion of the insect repellent net N is removed.
[0050]
When the press-fitting of the net holding rope R into the net receiving grooves G of the side frames F3 and F4 is completed, the rope guide 16 of the second net fixing device 7 likewise rises, and the screen door frame F becomes the portal type of the corner processing device 9. The frame 8 is reached.
[0051]
Then, the corner holding jig 23b is pushed down by the operation of the cylinder 23a of the corner holding mechanism 23 of the corner processing device 9, and the start end and the end of the net holding rope R floating from the net receiving groove G are together with the insect net N. It is pressed into the net receiving groove G. Next, by moving the slide base 8a, the corner cutter 24 of the corner processing device 9 is positioned inside the corner of the screen door frame F, and as shown in FIGS. 7B to 7D, the cylinders 24c and 24d are pushed out. After the heat cutter 24e is lowered, the heat cutter 24e is extruded toward the corner portion of the insect net N, and the remaining portion of the corner portion of the insect net N is cut off by the heat cutter provided in the first and second net fixing devices 6 and 7. Is done.
[0052]
The screen door completed as described above is transferred to the unloading side of the apparatus by the third conveyor 4c, and is conveyed to the next step, for example, an inspection step. It is repeated continuously.
[0053]
Note that, in the above-described embodiment, an example of an apparatus that moves the screen door frame F is shown. However, in the screen door screen finishing apparatus according to the present invention, the screen door frame F is fixed on the apparatus base, The side of the rope guide 16 provided with the press-fit roller 17, the rope winding arm 18, and the heat cutter 19 may be moved along the frame material of the screen frame F.
[0054]
Also, an example is shown in which a cutter for cutting the wire holding rope R is provided on the rope winding arm 18 by providing the cutter blade 18f on the slider 18c. Separately, for example, it may be disposed on the rope guide 16 or the device base 2.
[0055]
【The invention's effect】
As described above, since the screen door meshing apparatus according to claim 1 of the present invention has the above-described configuration, that is, the screen door presser, the cutter, and the rope winding arm, the screen door meshing groove of the screen door frame is inserted into the screen receiving groove of the screen door frame. From the start of press-fitting of the net holding rope, the press-fitting is completed, the net holding rope is cut, and the net holding rope separated from the press-fitted part is wound around the press-fit roller, that is, the next net holding rope press-fitting is started. A series of operations up to preparation can be performed continuously without human intervention, enabling labor saving in the installation of insect repellent nets to screen frames, and also supporting full automation of netting devices. This is an extremely excellent effect that can be achieved.
[0056]
In addition, the screen door meshing apparatus according to claim 2 of the present invention includes a press-fit roller and a rope winding arm, and the rope winding arm has a function of cutting the net holding rope. The same effect as the netting device according to item 1 can be obtained, and it is not necessary to separately provide a cutter for cutting the net holding rope, so that the entire device can be made more compact. Has the effect.
[Brief description of the drawings]
FIG. 1 (a) is a perspective view showing the structure of a press-fit roller and a rope winding arm in a screen door meshing apparatus according to one embodiment of the present invention.
FIG. 2B is an exploded perspective view showing the structure of the rope winding arm shown in FIG. 1.
FIG. 2 is a plan view showing the overall structure of a screen-screening device according to an embodiment of the present invention.
FIG. 3 is a side view showing in detail an arrangement of a net supplying device and a first net fixing device in the netting device shown in FIG. 2;
FIGS. 4A to 4D are operation diagrams for sequentially explaining the operation of the press-fit roller and the rope winding arm shown in FIG. 1;
5 (a) is a perspective view showing a press-fitting state of a net holding rope by the press-in roller shown in FIG. 1 and a removal state of an excess portion of the insect repellent net by a heat cutter.
(B) It is sectional drawing which shows the removal situation of the surplus part of the insect-proof net by a heat cutter.
FIG. 6 is a perspective view showing in detail a structure of a corner processing device in the netting device shown in FIG. 2;
FIG. 7A is a plan view showing a structure of a corner cutter of the corner processing device shown in FIG. 6;
(B) It is explanatory drawing which shows the standby state of the corner cutter shown to Fig.7 (a).
(C) It is explanatory drawing which shows the state in which the heat cutter of the corner cutter shown in FIG.
(D) It is explanatory drawing which shows the state which the heat cutter shown in FIG.7 (c) advanced and the insect-proof net was blown out in the corner of the frame.
[Explanation of symbols]
17 Press-in roller
18 Rope winding arm
18a Arm body
18c slider
18e Guide groove (guide part)
18f cutter blade (cutter)
18g clamp part
F Screen frame
G Net receiving groove
N insect repellent net
R Net holding rope

Claims (2)

A press-fit roller that can press up and down freely, while moving relative to the screen door frame, presses the continuously supplied screen holding rope together with the insect repelling net into the screen receiving groove of the screen door frame, and a cutter that separates the press-fitted portion of the screen holding rope. And a rope winding arm that is rotatably supported on the shaft of the press-fit roller , pinches and rotates the net press rope separated from the press-fitted portion, and moves the held net press rope along the outer peripheral surface of the press-fit roller. A screen covering device for a screen door, comprising: While being relatively moved with respect to the screen door frame, the continuously supplied screen holding rope is press-fitted into the screen receiving groove of the screen frame together with the insect repelling net, and is rotatably supported by the shaft of the press- fit roller, which can be raised and lowered. A rope that has a cutter that separates the press-fitted portion of the net holding rope, and that rotates while holding the net holding rope separated from the press-fitted portion , and moves the held net holding rope along the outer peripheral surface of the press-fit roller. screens network tensioning device characterized by and a winding arm.

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