JPS5939545B2 - Fishing net heat treatment method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and an apparatus for joining fishing nets into an endless band shape and subjecting the nets to steam treatment without moving the nets to a fixed size.

Heat treatment of fishing nets, especially vertical fishing nets, involves dyeing and dewatering the nets knitted by a knitting machine in a dyeing process, and then dyeing the nets to a fixed size (generally 151.5 m is the standard) in a heat treatment process. The net is stretched, tightened, and heat-set, but since the net expands and contracts in each of the above steps, in IFU, the net is knitted 6 to 12% longer than the standard size, and shrinks after the dyeing process. The length is 3 to 0% of the standard size, and it will shrink even more in the heat treatment process, but in order to prevent this shrinkage and make it the standard size, the final finished size is 2% of the standard size by heat setting while pulling the net. ~3% longer.

The reason why this standard size is 2 to 3 inches longer is that it will shrink due to aging after heat treatment, so we aim for 2 to 3% of the standard size to allow for shrinkage, but this shrinkage phenomenon This is due to the residual shrinkage rate of the net after heat treatment.

BACKGROUND ART Conventionally, a dry heat treatment method has been put to practical use as a method for heat treating fishing nets (row refers to pulling in the longitudinal direction of the woven net).

In the dry heat treatment method, as shown in FIG. 10, dry heat generated by a heat generator 40 such as gas or electricity is pumped by a blower 41 and circulated in a box-shaped heat treatment chamber 42. A plurality of rollers 43 for guiding the net are arranged in parallel on the entrance and exit sides of the net, and further,
A plurality of rubber-coated nip rollers 44 and 45 are supported in front and behind the heat treatment chamber so as to prevent the combined net from slipping, and transmissions 46 and 47 are disposed below each nip roller. The nip roller is connected to the transmission so that it can rotate, and the nip roller is connected to the transmission so that it can rotate.
As shown in FIG.
9, each roller is passed as a guide, and two sets of transmissions, front and rear, keep the circumferential speed of the nip roller on the pulling side constant, giving a circumferential speed difference between each nip roller, and applying a constant tension to the net, that is, a constant pulling rate. The heat treatment chamber 4 is heated to a heat treatment temperature.
Since heat treatment can be carried out continuously by passing the heat through
Discolored.

(2) The texture is not good because it is heat treated at high temperatures.

For example, in the case of nylon 6, it is 110 to 1 in the case of high pressure saturated steam.
Heat treatment can be done at 20℃, but dry heat treatment can be done at 160℃~
Because heat treatment can only be done at a high temperature of 180 degrees Celsius, the net becomes hard and has a poor texture.

(3) When dry heat is used, the residual shrinkage rate after heat treatment increases, and the net shrinks significantly due to aging.

(4) Since heat treatment is performed continuously by giving a speed difference to the two transmissions, it is not possible to achieve a standard size due to changes in the circumferential speed difference due to rotational fluctuations of the transmission and slippage of the nip rollers, so heat treatment is not possible. Disadvantages include variations in the length and mesh of each net, and when the nets are tied together, there are parts that tighten and parts that loosen, which not only increases water resistance but also reduces commercial value. In order to prevent this drawback, for example, a method and apparatus for heat treatment of fishing nets have been developed, as disclosed in Japanese Patent Application Laid-open No. 57-199861.

As shown in FIG. 11, the tenth roller support member B supports a plurality of rollers 11 that guide the net 10 in an array along the length direction inside the openable and closable steam treatment container A. and a 20th roller support member C are disposed facing each other, and at least one roller support member is movable back and forth in the direction of the other roller support member and can be stopped at a fixed size position. Piston rod 32 of the regulation device
Each of the roller support members B
, C is hung between the respective rollers of rollers B and C, passed and folded back, and several sets of end portions are joined to form an endless band, and at least one of the roller support members B and C is directed in the direction in which the net 10 is pulled. Although the above-mentioned drawbacks could be removed by moving the net, stopping it at a fixed size position, and heat-treating the net by sealing saturated steam in the steam-heating treatment container, on the other hand, the heat-treated net Since the part wrapped around the roller, that is, the part in contact with the roller IT, is curved and heat-set as shown in Figure 9, many knotted parts of the mesh (intersecting parts in the case of a knotless mesh) are formed. When joining them together to make a net that is actually used for fishing, only the curved parts of the joints become loose, and the mesh size of the part that is in contact with the rollers differs from the mesh size of the part that is not in contact, reducing quality. It had some drawbacks.

The present invention provides a means for rotating the rollers arranged and supported on at least one of the 10th roller support member and the 20th roller support member provided in the conventional device. The purpose of this invention is to provide a fishing net heat treatment method and apparatus that eliminates the disadvantages of fishing nets and produces high quality nets.

The method and device for heat treatment of fishing nets of the present invention provide a method for heat treatment of fishing nets and an apparatus thereof, in which inside a steam treatment container having an openable/closable door and capable of supplying and discharging saturated steam, a 10th-ra support member is installed along the longitudinal direction of the container. The 20th-ra support member is disposed to face the 20th-ra support member, and the 1st
A plurality of rollers for guiding the net are arrayed and supported on the 0-Ra support member, and a plurality of rollers are arranged and supported on the 20-Ra support member so that the rollers of the 10-Ra support member can fold back the passed net. rollers are arrayed and supported, and one (or both) of the roller support members is provided so as to be able to reciprocate in the direction of the other roller support member and to be able to stop at a fixed size position. A roller rotation device is connected to the fixed length sizing device, and further includes a roller rotation device for rotating the rollers on one or both of the roller support members,
A net before heat treatment is passed between the rollers of the 10th-La support member and the 20th-La support member, and then folded back to join several sets of end portions to form an endless band. At least one of the supporting members is moved in the direction of pulling the net and stopped at a fixed size position, and after closing the steaming treatment container, saturated steam is sealed inside the steaming treatment container, and each roller is moved. The net is configured to be heat-treated while being rotated and moved.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure and operation of an embodiment of the present invention will be explained below based on the accompanying drawings.

As shown in FIGS. 1 and 2, a steam heat treatment container A (having a door 11 that can be opened and closed, saturated steam is sealed in through a steam introduction valve 2T and a steam pipe 29, and can be discharged through a discharge valve 36 and a trap 3T) A tenth support member B for guiding the vertical fishing net 10 (hereinafter referred to as the net) is immovably installed in the container A in the direction of the closing part (hereinafter referred to as the rear part) of the container A. The second one is in the rear position.
A fixed length sizing device in which a 0-l support member C is disposed, and the 20-l support member C is movable back and forth in the direction of the 10-l support member B and can be stopped at a fixed length position. Furthermore, a roller rotating device E is attached to one (or both of the roller supporting members) of the above-mentioned roller supporting members so that the roller can be rotated by being connected to the roller.

Next, details of each member and device will be explained in order.

The 10th rail support member B is a rail 1 laid inside the container A and along the length direction as shown in FIGS. 3 and 4.
A truck 14 supported by wheels 13 is provided on the truck 2, a frame 15, 15' is fixed on the truck, and a net 10 is attached to the frame.
A plurality of rollers 17, 17 that guide the bearings 19, 19
They are arranged and supported as shown in FIG.

Further, fixing plates 22, 22 are fixed to the inner circumferential side of the container A as shown in FIGS. The container is provided so that it cannot be moved, but can be moved to the front of the container by removing the bolt 23 as necessary.

As shown in FIG. 3, the roller rotation device E has gears 1, 1 fitted and fixed to the shaft ends of the rollers 17, 17 of the 10th roller support member B, and the roller rotation device E has gears 1, 1 fitted and fixed to the shaft ends of the rollers 17, 17 of the 10th roller support member B. If used, the motor 3 is attached to the body of the container via the flange 4 (although it may be inside the container A), and the motor 3 is sealed to the container A via the output shaft 9 of the motor. A gear 2 is fitted and fixed to the tip of the roller 11.
It is fitted with the gears 1 and 1 at the end of the shaft of No. 17.

Further, a sprocket 5 is fitted and fixed to the other end of the roller 17 to which the gear 1 is fixed, and the other rollers 17, 1
As shown in Figs. 3 and 4, sprockets 5' and 7' are fitted and fixed to each roller by 5%, and each sprocket is connected to an endless chain 7, 7' as shown in Fig. 4. When the motor 3 is driven, the gear 1 is connected via the gear 2 which is fitted and fixed to the output shaft 9 of the motor.
, 1, that is, rotate the rollers 17, 17, and further rotate the sprocket 5 of the roller, the endless chain γ, and the sprocket 5.
', and is configured so that power can be transmitted to the endless chain T- to rotate each roller in one direction or in both forward and reverse directions.

The 20th rail support member C is a rail 1 support member C as shown in FIG.
A truck 25 supported by wheels 13 is provided on the truck 2, a frame 26, 26' is fixed on the truck, and a net 10 is attached to the frame.
As shown in FIG. 6, a plurality of rollers 11 guiding the nets 11 are arranged and supported by bearings 19 so that the nets 10 passed over the rollers 17 of the tenth roller support member B can be folded back.

Here, the reason why multiple rollers were arranged and supported is because the regular size of the net is long at 151.5 m (7 to 80 m).
For example, if the number of rollers is one each for both rollers B and C, even if it is folded back to form an endless belt, the length will be 151.5 ÷ 2 = 75.75 m, and the length of the container (steam heat treatment container) A will be 151.5 ÷ 2 = 75.75 m. The dimensions are very long, at least 80 m or more, and the installation area of the equipment is also large, making it uneconomical.
A large number of rollers are provided in order to make the longitudinal dimension of the container A short and economical.

The fixed length sizing device is composed of a hydraulic unit 30 and a hydraulic cylinder 31 shown in FIGS. 1 and 2, and is disposed at the rear outside of the container A as shown in FIG. 6.
The piston rod 32 of the hydraulic cylinder is sealed and inserted from the rear of the container A, and the tip of the piston rod is connected to the rear of the 20th-ra support member C by a connecting pin 33 to determine the fixed size. The piston rod 32 is expanded and contracted by the operation of the hydraulic cylinder 31 of the device, and the 20th-ra supporting member C is provided so as to be reciprocally movable in the direction of the 10th-ra supporting member B along the rail 12. When the supporting member C moves in the direction of pulling the net 10, the hydraulic pressure of the fixed length sizing device is controlled by a signal from a detector 35 such as a limit switch or a photoelectric switch that detects the position of the fixed length dimension shown in FIG. The operation of the cylinder 31 is stopped and the 20th-ra support member C is configured to stop at a fixed size position.

The operation will be explained using the above configuration.

Container A showing the knitted, dyed and dehydrated net 10 in FIG.
As shown in FIG.
The hook is passed between the roller IT and the row 911 of the 20th roller support member C and folded back, and several sets of end portions are joined to form an endless band. After closing the door 11 and sealing the container A, steam is introduced. The valve 2T is opened to supply and seal saturated steam in accordance with the material of the mesh into the container, and at the same time, the hydraulic cylinder 31 of the fixed length sizing device is operated to contract the piston rod 32 to support the 20th la. The member C is moved in a direction away from the 10th-ra support member B, the loosened net is pulled, and the operation of the hydraulic cylinder 31 is stopped at the fixed size position to apply tension to the net 10.

Furthermore, the motor of the roller rotation device E attached to the 10th roller support member BK is driven to rotate the gear 2, the gears 1, 1 meshed with the gear, and the rollers 17, 17 of the respective gears, and the sprocket 5. The heat treatment is performed by repeatedly moving back and forth with tension applied to the net 10 by transmitting the heat to the endless chain T, sprocket 5, and endless chain 7' and rotating the respective rollers in forward and reverse directions. It is necessary to move the distance at least to a position where the contact part of the net 10 that is in contact with the husband's roller does not come in contact with it, and the net may be moved back and forth a certain distance, or it may be moved continuously in one direction. You may move it.

Here, the time and temperature required for the heat treatment vary depending on the material of the mesh 10 (Tetron, nylon, etc.).

When the heat treatment is completed, the air introduction valve 28 is opened to return the inside of the container A to atmospheric pressure, and then the door 11 is opened and the fixed length sizing device is operated in reverse to extend the piston rod 32 of the hydraulic cylinder 31. The 20th roller supporting member C is moved forward to loosen the tension on the net 10, and at the same time, the operation of the roller rotation device E is stopped to stop the rotation of each roller, and the net 10 is
After that, the door 11 is opened and the joints of the heat-treated net 10 are removed, and one end of several pairs is joined to the transport net, and the other end is joined to the carry-in net to form the net. 10 is transferred to replace the net before heat treatment in the container A, and then the joint portion with the heat treated net, that is, the transport net is removed, and the above-mentioned operation is repeated.

Here, the reason why the heat treatment is performed without moving the net 10 using the roller rotation device E will be explained.

If the diameter of the roller of the device of the present invention is, for example, 2'80 mm, and a net with a thickness of 2 mrn is wound around the roller and tension is applied to the net, the center of the net 10 wound around the roller 11 as shown in FIG. The distance Rmid from to the center of the roller
is 41 mm, the pressure edge Rmax from the outside of the screen to the center of the roller is 41+1=42 mm, and the pressure edge Rmin from the inside of the screen to the center of the roller is 441-1=40i.

Therefore, if the net 10 is wrapped around the roller 17 at an angle of 1800 as shown in FIG. 8, the winding dimension of the net at the Rmid position is Rmid
0°−RmidXπ=41 X3.14=128.74
Become a friend.

The winding dimension of the net at the Rmax position is RmaxXπ=4
2×π-42X3.14=131.88mm, and the winding dimension of the net at the Rmin position is Rmin
．． 14=125.6mm.

Here, the difference is 128.74-131.88=-3, based on the winding dimension at the Rm i d position of the net.
14 hours, 128.74-125.6-+3.14.

Therefore, the net 10 wrapped around the roller 17 is shrunk by 3.14 mm on the inside and expanded by 3.14 mm on the outside.
When the net 10 is removed from the roller 11 by heat treatment in this state, the part in contact with the roller 11 becomes curved as shown in FIG. In this case, a phenomenon of increasing size occurs, so
As a solution to this problem, when heat treatment is performed, each roller 17
By rotating the net 10 to constantly move the net 10 and minimizing the time during which it is in contact with the rollers 11, it is possible to create a net that is no different from a net that has been heat-treated without contacting the rollers.

In the above embodiment, the 20th-L support member C was connected to the standard length sizing device, but if necessary, the 10th-R support member B may also be connected to another standard length sizing device. The roller support members B and C may be moved.

In addition, 1. The saturated steam sealed in the steam heat treatment container A is saturated steam at a heat treatment temperature depending on the material of the net 10 to be heat treated. For example, for nylon 6, high pressure saturated steam at 110 to 120 °C is used. For polyethylene, normal pressure saturated steam of 100°C or less is used, and naturally the steaming treatment container A is equipped with a structure that can withstand this pressure, safety valves, valves, traps, etc. necessary for this structure, and also has a structure that can withstand the pressure. By communicating with a pressure reducing device that reduces the pressure, saturated steam can be easily supplied and the heat treatability of the net can be improved.

Furthermore, in the embodiments of the present invention, the fixed length sizing device is provided outside the container A, but it may be provided inside the container A if necessary. Regardless of the embodiments of the invention, the gist of the present invention does not change as long as a reciprocating mechanism for reciprocating the 20th-ra support member C is provided.

As described above, in the present invention, a net is placed between the respective rollers of the 10th and 20th rollers, which are disposed facing each other inside the steam treatment container, and is then folded back and joined to form an endless band. By pulling the net to the standard size position and heat-treating it with saturated steam while moving the net by operating a roller rotation device, the net is heat-treated with saturated steam without moving the net. This prevents the net from being heat-fixed in a curved state, so when a large number of nets are connected at their knots or intersections to create a net needed for fishing, they can be connected evenly, and There is no change in the size of the mesh between the outside and the inside that are in contact with the rollers, and a uniform mesh can be obtained, making it possible to provide a high-quality mesh.

[Brief explanation of drawings]

FIG. 1 is a top view showing the overall configuration of an embodiment of the present invention, and FIG. 2 is a side view of FIG. 1. FIG. 3 shows a front view of the 10th-ra support member taken along the line HH' in FIG. 2, and FIG. 4 shows a side view of FIG. 3. FIG. 5 is a partial top view showing the arrangement of the 10th roller support member, the fixing plate of the container, and the roller rotating device. FIG. 6 shows a side view of the 20th-ra support member and the standard size determining device. FIG. 7 is a simplified diagram showing a state in which a net is hung between the respective rollers of the 10th-ra support member and the 20th-ra support member, passed around, folded back, joined to form an endless band, and the net is stretched. FIG. 8 shows a state in which the net is wound around a roller and tension is applied to it, and FIG. 9 shows a state in which the net is heat-treated in the state shown in FIG. 8 and then carried out and expanded. FIG. 10 is a side view showing the overall configuration of a conventional vertical fishing net heat treatment apparatus. FIG. 11 is a side view showing the overall structure of a conventional fishing net heat treatment apparatus that eliminates the drawbacks of FIG. 10. A...Steam treatment container, B...No. 107
U support member, C... 20th-A support member, D.
...Standard size determining device, E...Roller rotating device, 10...Net, IT...Roller.

Claims (1)

[Claims] 1. A net is hung between the rollers of the 10th-ra support member and the 20th-ra support member, which are disposed facing each other inside the openable and closable steam treatment container. After joining the end portions of the net to form an endless band shape, a fixed length sizing device is operated to form at least one of the roller support members.
The net is moved in the pulling direction and stopped at the fixed size position, the steaming treatment container is closed and saturated steam is sealed inside the steaming treatment container, and the roller rotation device is activated to rotate the rollers to remove the net. A method for heat treatment of fishing nets, characterized by heat treating the nets while moving the nets. 2 Inside the openable and closable steam treatment container and along the longitudinal direction, a 10th roller support member and a 20th roller support member are arranged to face each other, and at least one roller support member is connected to the other roller. a roller rotation device that is connected to a fixed length sizing device that is movable back and forth in the direction of the support member and capable of stopping at a fixed length size position, and further rotates a roller on at least one of the roller support members; A heat treatment device for fishing nets, characterized in that it is equipped with. 3. The fishing net heat treatment apparatus according to claim 2, wherein the 10-ra support member supports a plurality of rollers arranged to guide the net. 4. Scope of Claims in which the 20th-Ra support member arranges and supports a plurality of rollers for guiding the net so that the net can be hung, passed, and folded back together with the plurality of rollers arranged and supported on the 10th-Ra support member. The fishing net heat treatment device according to item 2.