CN111935976B

CN111935976B - Fish feeding device

Info

Publication number: CN111935976B
Application number: CN201980024583.2A
Authority: CN
Inventors: 冈本秀树; 稻田康正; 陈卫民
Original assignee: Nippon Suisan Kaisha Ltd
Current assignee: Nissui Corp
Priority date: 2018-04-13
Filing date: 2019-02-14
Publication date: 2022-07-26
Anticipated expiration: 2039-02-14
Also published as: CN111935976A; JPWO2019198332A1; JP7195034B2; WO2019198332A1

Abstract

Provided is a feeding device for fish farming, which can scatter granular feed uniformly in all directions in a certain area. A feeding device (10) for fish farming is characterized by comprising: a feed tank (20) disposed above the water surface; a conveying path (30) for conveying the pellet feed from the feed tank (20); a flat plate-shaped impeller (40) which is positioned at the end point of the conveying path (30), rotates relative to a rotating shaft (43A) arranged at the center, and has an arc portion at least in part of the periphery; and a scattering member (45) which is mounted on the upper surface of the impeller (40) and has a portion inclined to the opposite side of the rotation direction.

Description

Fish feeding device

Technical Field

The present invention relates to a feeding device for feeding farmed fish in a fish pond or the like with pellet feed.

Background

In feeding of farmed fish, various feeding techniques have been developed in which pellet feed is scattered by centrifugal force. For example, japanese patent application laid-open No. 56-28129 discloses the following technique: on the rotating disk, blades of different lengths are arranged radially and uniformly on a line passing through the rotating shaft, and the granulated feed is scattered over a wide range at a long distance.

Further, the following techniques are disclosed in japanese patent publication No. 2004-208627: the pellet is scattered by using a rotating disk provided with blades in the same manner, but the blades are arranged uniformly on the rotating disk at an angle on a line not passing through the rotating shaft.

Further, CN 102257979 a discloses the following technique: a feeding device having a rotating disk provided with blades is floated on the water surface of a shrimp farming place by a floating body, and is moved on the water surface by pulleys and a rope to feed.

Disclosure of Invention

Problems to be solved by the invention

The above techniques aim to scatter the pellet feed as far as possible and uniformly in a fan-shaped or circular range by centrifugal force. The invention provides a feeding device for fish culture, which can make granulated feed scatter in all directions in a certain area.

Means for solving the problems

The present invention is directed to the fish feeding device disclosed in the following (1) to (6).

(1) A feeding device for fish farming, characterized in that it comprises: a feed tank disposed above the water surface; a carrying path for carrying the pellet feed from the feed tank; a flat plate-shaped impeller that is positioned at an end point of the conveyance path, rotates about a rotation axis provided at the center, and has an arc portion at least partially on a peripheral edge; and a scattering member which is attached to an upper surface of the impeller and has a portion inclined to the opposite side of the rotation direction.

(2) The feeding device for fish farming according to (1), wherein the scattering member is formed of a planar member.

(3) The feeding device for fish farming according to (2), wherein the scattering member is attached to the upper surface of the impeller such that an extension line of an attachment direction thereof avoids the rotation shaft.

(4) The feeding device for fish farming according to (2) or (3), wherein the scattering member is disposed in a plurality of equal positions with respect to the rotary shaft.

(5) The feeding device for culturing fish according to the item (4), wherein the scattering members are provided in 2 pieces so as to face the rotary shaft, and a notch portion recessed toward the center is formed at 2 between the scattering members at the periphery of the impeller.

(6) The feeding device for fish farming according to any one of (1) to (5), wherein the conveying path includes: a cylindrical conveying drum; a carrying-in port through which the pellet feed is carried into the conveying cylinder; a carrying-out port for carrying out the granulated feed above the impeller; and a conveying coil that is provided inside the conveying drum and conveys the pellet feed from the carry-in port to the carry-out port, wherein the conveying coil is formed of a spiral metal wire rod, and the conveying coil includes one or both of a feed drop prevention blade and a clogging prevention blade, the feed drop prevention blade extends the width of the metal wire rod in the axial direction at a portion corresponding to the carry-out port to cover the carry-out port, and the clogging prevention blade extends the width of the metal wire rod in the axial direction at a portion corresponding to the carry-in port to cover the carry-in port.

Effects of the invention

According to the above configuration of the present invention, in the feeding device for fish farming, the pellet feed can be scattered uniformly in all directions in a certain area.

Drawings

Fig. 1 is a side view of a feeding device for fish farming according to the present invention.

Fig. 2 is a side view showing the internal construction of a feed tank of the feeding device for fish farming of the present invention.

Fig. 3 shows the internal structure of fig. 2 in a plan view.

Fig. 4 shows a rear view from the direction IV in fig. 3. Wherein the hopper is omitted and the bottom plate is shown in cross-section.

Fig. 5A is a plan view of a rotating disk constituting the impeller.

Fig. 5B is a plan view of the scattering member inclined at an angle of 105 °.

Fig. 5C is a cross-sectional view of Vc-Vc of fig. 5B.

Fig. 5D is a plan view of the scattering member inclined at 135 °.

Fig. 5E is a cross-sectional view of Ve-Ve of fig. 5D.

Fig. 6A is a plan view of the impeller, and shows a case where a scattering member having an inclination angle of 105 ° is attached.

Fig. 6B is a plan view of the impeller, and shows a case where the scattering member having an inclination angle of 135 ° is attached.

Fig. 7A is a side view of the transported coil.

Fig. 7B is a front view seen from the VIIb direction of fig. 7A.

Fig. 7C is a back view seen from VIIc direction of fig. 7A.

Fig. 8 is a schematic plan view of the scattering region in the example.

Fig. 9A is a modification of the scattering member, and is a plan view of the vane plate a.

Fig. 9B is a modification of the scattering member, and is a plan view of the blade plate B.

Fig. 9C is a modification of the scattering member, and is a plan view of the vane plate C.

FIG. 9D is a cross-sectional view IXd-IXd of FIG. 9C.

Fig. 10 shows a modification of the rotary disk.

Fig. 11 shows a modification of the rotary disk.

Detailed Description

Embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that the numerical values and materials of the dimensions and angles mentioned in the following description are merely examples, and the present invention is not limited to these examples.

< appearance >

Fig. 1 shows a fish farming feeding device 10 according to an embodiment of the present invention in a side view. In a plan view, the feeding device 10 for fish farming is provided with a feed tank 20 made of Fiber Reinforced Plastic (FRP) above a frame 11 of a substantially square steel-plated pipe having an outer peripheral side of 5m and an inner peripheral side of 4 m. Further, 3 floating bodies 12 made of plastic are provided on each side of the lower edge of the frame 11, and thus the feeding device 10 for fish farming is provided in a state of floating on the water surface in the fishpond. Further, 3 appetite sensors 25 (see fig. 3) are provided so as to protrude from the feed tank 20 to the lower water. In addition, the appetite sensor 25 at 3 in fig. 3 is referred to as a 1 st sensor 25A, a 2 nd sensor 25B, and a 3 rd sensor 25C counterclockwise from the left side. These appetite sensors 25 detect the appetite of the farmed fish in the fish farming facility, and use contact sensors. In addition, known sensors such as an infrared sensor, an ultrasonic sensor, an optical sensor, and a pressure sensor may be used as the appetite sensor 25.

The feed tank 20 has a cylindrical shape with a diameter of about 2m, and a tank opening 22 for supplying the pellet feed to the inside is formed on the upper surface thereof. In addition, an openable and closable door 23 is provided at the front and rear surfaces 2 for maintenance of the inside.

< internal Structure >

A hopper 21 shown in fig. 2 is housed inside the feed tank 20, and the hopper 21 is reduced in diameter in a funnel shape downward. A part of the bottom plate 24 of the feed tank 20 is a raised portion 24A that rises upward. A disc-shaped impeller 40 is provided on the lower surface side of the raised portion 24A, that is, a portion recessed upward when viewed from below. The structure of the impeller 40 will be described in detail later. An opening 24B is provided above the impeller 40 in the raised portion 24A of the bottom plate 24, and the conveyance path 30 is interposed between the bottom of the hopper 21 and the opening 24B. Although power supply equipment and a control device (controller) necessary for the operation of the feeding apparatus 10 for fish farming are provided inside the feed tank 20, illustration and description thereof are omitted.

< conveyance route >

The conveying path 30 includes a cylindrical conveying drum 31 provided parallel to the bottom plate 24. As shown in fig. 3, a carrying-in port 32 is provided at the bottom of the hopper 21, and the carrying-in port 32 communicates with the inside of the conveying cylinder 31 in the vicinity of one end (left end side in fig. 3) of the conveying cylinder 31. On the other hand, a carrying-out port 33 is provided near the other end (right end side in fig. 3) of the conveying cylinder 31, and the carrying-out port 33 connects the inside of the conveying cylinder 31 and the opening 24B (see also fig. 2 and 4).

In fig. 3, a conveying coil (coil)34 is visually recognized, and the conveying coil 34 is housed in the conveying drum 31 and conveys the pellet feed. The conveying coil 34 is rotated by a conveying motor 35 provided at one end of the conveying drum 31, and the pellet fed carried in from the carrying-in port 32 is conveyed to the carrying-out port 33, and is carried out therefrom to above the impeller 40 located at the end point of the conveying path 30.

Further, the bottom plate 24 is provided with a scattering motor 43 for rotating the impeller 40, and a rotating shaft 43A of the scattering motor 43 penetrates the bottom plate 24 and is connected to a rotating disk 41 (described later) of the impeller 40.

< impeller >

The impeller 40 has a planar shape shown in fig. 6A or 6B by attaching the scattering member 45 shown in fig. 5B or 5D to the circular rotating disk 41 shown in fig. 5A. The impeller 40 is provided at the position of the carry-out port 33 corresponding to the end point of the conveying path 30.

The turntable 41 is formed of a stainless steel plate having a circular flat plate shape and a diameter of 250mm, and the entire periphery thereof is an arc portion 41D. A shaft hole 42 is formed in the center of the rotary plate 41, and the rotary shaft 43A is attached to the shaft hole 42. Further, a proximal mounting hole 41A facing the shaft hole 42 is formed at a position 2 spaced 69mm apart from the shaft hole 42. 5 distal mounting holes 41B are formed on the edge sides spaced 48mm apart from the proximal mounting holes 41A. Of these distal mounting holes 41B, the most peripheral distal mounting hole is located on an extension line connecting the shaft hole 42 and the proximal mounting hole 41A. The 2 nd distal mounting hole 41B on the edge side is provided at a position forming an angle of 20 ° with the extension line. Thereafter, the 3 rd, 4 th and 5 th distal mounting holes 41B are further provided at positions forming angles of 20 °, 20 ° and 15 °, respectively. That is, the line segment connecting the proximal mounting hole 41A and the distal mounting hole 41B forms angles of 0 °, 20 °, 40 °, 60 °, and 75 ° with the extension line in this order (see fig. 5A).

As shown in fig. 5B or 5D, the scattering member 45 is formed by bending 1 steel plate to form a mounting portion 45A having 2 mounting holes 45C and an inclined portion 45B inclined at a predetermined angle with respect to the mounting portion 45A. In the scattering member 45 shown in fig. 5B, as shown in fig. 5C, which is a cross section Vc-Vc, the angle formed by the mounting portion 45A and the inclined portion 45B is 105 °, and in the scattering member 45 shown in fig. 5D, as shown in fig. 5E, which is a cross section Ve-Ve, the angle formed by the mounting portion 45A and the inclined portion 45B is 135 °. The angle formed by the mounting portion 45A and the inclined portion 45B is not limited to these angles, as long as it is an obtuse angle.

The inclination of the inclined portion 45B has the following meaning: the pellet that collides with the inclined portion 45B scatters so as to be projected upward according to the angle. The scattering member 45 may have a portion inclined as in the inclined portion 45B described above, and need not be constituted only by such a flat plate-like portion as described above. For example, a part or the whole may be formed of a curved surface. In addition to the plate-like structure, for example, pins inclined at the predetermined angle may be implanted in a row on the upper surface of the turntable 41.

The impeller 40 is formed to rotate clockwise in a plan view shown in fig. 6A and 6B. That is, the scattering member 45 is evenly attached to the upper surface of the rotating disk 41 so as to face the shaft hole 42 such that the inclined portion 45B thereof is inclined to the opposite side of the rotation direction. At this time, when the angle formed by the extension line connecting the shaft hole 42 and the proximal mounting hole 41A and the line segment connecting the proximal mounting hole 41A and the distal mounting hole 41B is not 0 ° out of the above-mentioned angles, the scattering member 45 is mounted so that the extension line of the mounting direction thereof avoids the rotation axis. The number of the scattering members 45 is not limited to 2 as in the present embodiment, and a plurality of 3 or more scattering members 45 may be uniformly mounted.

< conveying coil Material >

The conveying coil 34 is formed as a coil spring made of a stainless steel spiral wire material as shown in fig. 7A. The left end side of fig. 7A corresponds to the side of the conveying drum 31 on which the conveying motor 35 is provided, and is a portion in which an end turn portion 35B shown in fig. 7B as viewed in the VIIb direction in fig. 7A is connected to a rotation shaft, not shown, of the conveying motor 35 via a coil joint 35A. Thus, the conveying coil 34 rotates about its axial center by the rotation of the conveying motor 35.

The right end side of the conveyed coil 34 in fig. 7A corresponds to the side of the conveying drum 31 where the carrying-out port 33 is provided. Further, a propeller-shaped feed drop preventing blade 34A is provided at a portion of the conveying coil 34 corresponding to the carrying-out port 33, and the feed drop preventing blade 34A expands the width of the wire rod constituting the coil spring in the axial direction. The feed falling preventive fin 34A occupies a position of blocking the carrying port 33 in the carrying cylinder 31, and occupies an edge region other than the vicinity of the axial center as viewed from the side as shown in fig. 7C viewed from VIIc direction of fig. 7A. The fodder falling preventive blade 34A is provided for the following purpose: in a state where the conveying coil 34 is not operated, the pellet feed remaining in the conveying cylinder 31 is prevented from leaking to the carrying-out port 33 and falling to the water surface when the feeding device 10 for fish farming swings on the water surface of the fishpond by waves or wind, thereby avoiding feeding at an unintended timing. On the other hand, a jam preventing blade 34B is also provided in the vicinity of the left end of the conveying coil 34, and the jam preventing blade 34B has the same structure as the feed drop preventing blade 34A. The clogging prevention blade 34B increases the conveying force of the carried pellet feed by expanding the width of the wire rod in the axial direction near the carrying-in port 32 for carrying the pellet feed, thereby preventing clogging of the pellet feed.

In addition, either one of the feed drop preventing blade 34A and the clogging preventing blade 34B may be provided to the conveying coil 34.

< action >

The fish-farming feeding device 10 of the present embodiment having the above-described structure functions as follows.

The hopper 21 (see fig. 2) inside the feed tank 20 (see fig. 1) is connected to the conveyance path 30 via the mounting base 21A. The hopper 21 accommodates a granulated feed supplied through a tank opening 22 (see fig. 1). The granulated feed drops into the conveying cylinder 31 (see fig. 2 and 4) through the carrying-in port 32 (see fig. 3) at the bottom of the hopper 21.

Here, by operating the conveying motor 35 (see fig. 2 and 3), the conveying coil 34 (see fig. 3 and 7A to 7C) inside the drum rotates in the direction of the arrow in fig. 7B (in other words, clockwise in the conveying direction of the pellet feed), and the pellet feed is conveyed inside the conveying drum 31 toward the carrying-out port 33 (see fig. 2 to 4). The granulated feed reaching the carrying-out port 33 passes through the opening 24B (see fig. 2 and 4) of the bottom plate 24, and falls onto the impeller 40 (see fig. 2 and 4 and 6A and 6B) rotated by the scattering motor 43 (see fig. 3 and 4).

The conveyance motor 35 and the scattering motor 43 are controlled by a program of a controller, not shown. Specifically, the controller performs control in the following manner: the scattering motor 43 starts operating, and the conveyance motor 35 starts operating, for example, with a time difference of about 1 second. By controlling in this way, the pellet feed can be prevented from falling to above the impeller 40 and accumulating in a state where the scattering motor 43 is not operating. Further, the pellet feed can be scattered more uniformly.

The granulated feed dropped onto the upper surface of the rotating impeller 40 is ejected in the rotation direction by the inclined portion 45B (see fig. 5B and 5D) of the scattering member 45 provided on the upper surface of the rotating disk 41 (see fig. 5A), and is scattered in the range of the frame 11 and the floating body 12 (see fig. 1).

When the rotation of the conveyance motor 35 is stopped, the rotation of the conveyance coil 34 is also stopped. At this time, the controller performs control in the following manner: the conveyance motor 35 stops, and the scattering motor 43 stops, for example, at a time difference of about 1 second. By controlling in this way, the pellet feed can be prevented from dropping above the impeller 40 and accumulating.

At this time, the pellet feed that is not scattered remains inside the transfer drum 31. However, the feed drop preventing blade 34A (see fig. 7A and 7B) is provided on the conveying coil 34, and the feed drop preventing blade 34A covers the carrying-out port 33. This prevents the frame 11 (see fig. 1) from being swung by waves or wind, and the pellet feed remaining in the conveying drum 31 from leaking out of the carrying-out port 33 and falling to the water surface.

The feeding device 10 for fish farming of the present embodiment is particularly suitable for farming fish that ingest granular feed, such as salmon and seriola, and also for farming octopus meta, red sea bream, mackerel, and large yellow croaker.

[ examples ] A method for producing a compound

< outline of the fly-off test >

The structure of the impeller 40 was verified by the scattering test described below.

A simulated feeding device having the hopper 21, the conveying path 30, and the impeller 40 shown in fig. 2 was prepared, and this simulated feeding device was installed at a position where the center of the feeding device 10 for fish farming, specifically, the carrying-in port 32 of the conveying path 30 was located at the center of a square scattering area 50 having a side of about 4m, as shown in a plan view in fig. 8. The scattering area 50 is assumed to be an area inside the frame 11 (see fig. 1) of the feeding apparatus 10 for fish farming.

The scattering region 50 is divided into 4 square regions by the X axis and the Y axis, where the Y axis is an axis along the longitudinal direction of the conveying path, and the X axis is an axis perpendicular to the Y axis at the position of the conveying inlet 32. The 1 scale shown on the X and Y axes is 0.5 m. Of these 4 regions, the region in which the impeller 40 is located is set as a region IV, and clockwise from here, the regions III, II, and I are set.

Here, the conveyance motor 35 is located between the areas I and II. In addition, appetite sensors 25 are located in zone I, zone III and zone IV, respectively. In addition, the 1 st sensor 25A, the 2 nd sensor 25B, and the 3 rd sensor 25C are located in the region I, the region III, and the region IV, respectively.

The rotational speed of the conveyance motor 35 (see fig. 2) in the conveyance path 30 was 57.3rpm, and the rotational speed of the scattering motor 43 (see fig. 4) of the impeller 40 was 573.3 rpm. In the top view of fig. 8, the impeller 40 rotates clockwise.

In the fly-away test, the red sea bream EP5, manufactured by farmchoice corporation (ファームチョイス), was used as a pellet feed. About 1kg of the pellet feed was put into the hopper 21 in each 1 test, and then, under the above conditions, all scattering was completed in about 10 seconds.

< example 1>

In example 1, as the impeller 40, a member in which the scattering member 45 shown in fig. 5B or 5D is attached to the rotating disk 41 shown in fig. 5A as shown in fig. 6A or 6B is used. The impeller 40 was adjusted in 14 mounting modes shown in table 1 below.

The diameter of the rotating disk 41 (see fig. 5A) is 250mm in the mounting modes 1 to 12, and 280mm in the mounting modes 13 and 14.

The number of the scattered members 45 (see fig. 5B to 5D) to be mounted is 2 in the mounting modes 1 to 10, 13, and 14, facing the shaft hole 42, and 1 in the mounting

modes

11 and 12.

The inclination angle of the inclined portion 45B (see fig. 5C and 5E) of the scattering member 45 is 135 ° in the mounting modes 1 to 5, 11, and 13, and 105 ° in the mounting modes 6 to 10, 12, and 14.

Regarding the installation angle of the scattering members 45 (refer to fig. 6A and 6B), 0 ° is set in the installation modes 1 and 6, 20 ° is set in the installation modes 2 and 7, 40 ° is set in the installation modes 3 and 8, 60 ° is set in the installation modes 4, 9, and 11 to 14, and 75 ° is set in the installation modes 5 and 10.

In each of the above installation modes, the pellet feed was visually evaluated based on the amount of the pellet feed dispersed in each of the areas I to IV in a state where the pellet feed was completely dispersed in the scattering area 50 under the above-described conditions. The evaluation criteria are as follows.

A: large amount of spread

B: less than evaluation A, but sufficient for feeding

C: less scatter and inadequate feeding

D: the amount of spread is very small

The results are shown in table 1 below.

[ TABLE 1 ]

< Tilt Angle and mounting Angle >

The tilt angle and the mounting angle were examined for mounting patterns 1 to 10 in which the diameter of the rotating disk was 250mm and 2 scattering members 45 were mounted.

First, in the case of the inclination angle of 135 °, in the installation mode 1 in which the installation angle is 0 °, the pellet feed is concentrated in the area I and also scattered to the outside of the area IV. The pellet feed in zones II and III is minimal.

In the mounting pattern 2 at the mounting angle of 20 °, the scattering state is substantially the same as that in the mounting pattern 1.

In installation mode 3, with an installation angle of 40 °, the pellet feed is concentrated in zone I. Compared to installation mode 1, pellet feed in zone IV was reduced and pellet feed in zones II and III was slightly increased.

Also, in the installation mode 4 of the installation angle of 60 °, the pellet feed is concentrated in the regions I and II, but the pellet feed in the region I is more than the pellet feed in the region II. Compared to installation mode 1, pellet feed in zone IV was reduced and pellet feed in zone III was slightly increased.

In installation mode 5, in which the installation angle is 75 °, the pellet feed is concentrated in regions I and II, but the pellet feed in regions II and III is increased as compared to installation mode 4.

Next, in the case of the inclination angle of 105 °, in the installation pattern 6 with the installation angle of 0 °, the pellet feed was concentrated in the area I, as in the installation pattern 1 with the same installation angle. The pellet feed also flies outside the area IV. The pellet feed in zones II and III was minimal. However, the scattering range of the pellet feed is wider than that in the installation mode 1.

In installation mode 7, with an installation angle of 20 °, the granulated feed is still concentrated in zone I. The pellet feed also flies outside the area IV. In addition, the pellet feed in the region II becomes more. There was less pellet feed in zone III. The scattering range of the pellet feed is slightly wider than that of the installation mode 6.

In the installation mode 8 at the installation angle of 40 °, the pellet feed flies widely and equally in the areas I and II. Less pellet feed was found in zones III and IV.

In installation mode 9, with an installation angle of 60 °, the pellet feed is still concentrated in zones I and II. Pellet feed in zone II was increased compared to installation mode 8. The pellet feed in zones III and IV was less.

In installation mode 10, at an installation angle of 75 °, the pellet feed is still concentrated in zones I and II. The pellet feed in zones II and III was further increased compared to installation mode 9. There was less pellet feed in zone IV.

As a result of the above, in any inclination angle, in the case where the installation angle is small (that is, in the case where the extension line of the fitting direction of the scattering member 45 passes through 0 ° of the rotation shaft 43A, and in the case where the extension line of the fitting direction passes through the second smallest 20 °), most of the pellet feed scatters toward the area I. Further, as the extension line of the assembly direction of the scattering members 45 avoids the rotation axis 43A and the mounting angle increases, the scattering ratio toward the region II becomes higher. This is presumably because, when the pellet is collided with the scattering member 45 above the impeller 40, the smaller the mounting angle, the more easily the direction of pellet rebounding coincides with the rotation direction of the impeller 40, whereas the larger the mounting angle, the more easily the direction of pellet rebounding is directed outward with respect to the rotation direction of the impeller 40.

Accordingly, the mounting angle is preferably 60 ° or 75 °, particularly 75 °, from the viewpoint of more evenly scattering the pellet feed on the water surface of the fish pond at the position of the appetite sensor 25 within the range of the frame 11 of the feeding apparatus 10 for fish farming.

In addition, when the scattering members 45 are attached at the same attachment angle, the pellet feed can be scattered more widely and uniformly at the inclination angle of 105 ° than at the inclination angle of 135 °. This is presumably because, when the pellet collides with the scattering member 45 above the impeller 40, the pellet rebounds upward when the inclination angle is large, and therefore the flight distance becomes short.

< number of flying parts >

The number of the scattered parts 45 was verified in comparison with the mounting patterns 4 and 9 in which the excellent mounting angle of 60 ° was evaluated among the mounting patterns 1 to 10 verified above.

As a result, as shown in table 1, although there was no problem in the rotation balance in the same mounting mode 11 as the mounting mode 4 except that the number of the scattering members 45 was 1, the pellet feed was more concentrated in the areas I and IV and the pellet feed in the areas II and III was less in the scattering range of the pellet feed than in the mounting mode 4 in which the number of the scattering members 45 was 2.

In the same installation mode 12 as the installation mode 9 except that the number of the scattering members 45 is 1, there is no problem in the rotation balance, but the range of scattering of the pellet feed is more concentrated in the areas I and IV than in the installation mode 9 in which the number of the scattering members 45 is 2, and the pellet feed in the areas II and III is less.

This is presumably because, since the number of the scattering members 45 is 1, the ratio of the pellet feed falling only by the centrifugal force generated by the rotation of the impeller 40 is increased without colliding with the scattering members 45, and the ratio of the pellet feed scattering in the region IV is increased, and as a result, the deviation occurs as compared with the case where the number of the scattering members 45 is 2.

< diameter of rotating disk >

The diameter of the rotating disk 41 was verified in comparison with the mounting patterns 4 and 9, which evaluated an excellent mounting angle of 60 °, among the mounting patterns 1 to 10 verified above.

As a result, as shown in table 1, in the same mounting mode 13 as the mounting mode 4 except that the diameter of the rotating disk 41 was 280mm, the pellet feed was concentrated in the regions I, II and IV as compared with the mounting mode 4, but the scattering range was widened. There was less pellet feed in zone III. In any region, the amount of pellet feed immediately below and in the vicinity of the impeller 40 is small. The same applies to the mounting pattern 14 that is the same as the mounting pattern 9 described above, except that the diameter of the rotary disk 41 is 280 mm.

Thus, if the same conditions are used, the larger the diameter of the rotating disk 41, the wider and more evenly the pellet feed is scattered.

As described above, the scattering members 45 having the inclination angle of 105 ° can scatter the granulated feed more widely and uniformly than the scattering members 45 having the inclination angle of 135 ° at the same installation angle. In addition, in the case of the scattering members 45 having the same inclination angle, the granulated feed can be scattered more widely and uniformly at the installation angle of 60 ° or 75 ° than at other installation angles. In addition, it is considered that the mounting angle is preferably set to 75 ° in order to bring the farmed fish close to the appetite sensor 25 (the 2 nd sensor 25B) provided in the region III.

Further, it is found that the diameter of the rotating disk 41 affects the scattering range of the pellet feed. That is, the impeller 40 having the rotating disk 41 with a diameter of 280mm can scatter the pellet feed in a wider range than the impeller 40 having the rotating disk 41 with a diameter of 250 mm.

As described above, according to the results shown in table 1, the scattering range of the pellet feed is the widest and uniform in the impeller 40 in which the scattering members 45 having an inclination angle of 105 ° are mounted on the rotating disk 41 having a diameter of 280mm at a mounting angle of 60 ° or 75 ° (particularly 75 °).

Here, for example, in the feeding device 10 for fish farming shown in fig. 1, when the scattering distance of the pellet feed is excessively large, the pellet feed sometimes falls on the upper side of the frame 11 or the floating body 12. In this way, the seabirds fly toward the pellet feed, and the farmed fish avoid the seabirds and do not approach the water surface, which is considered to cause a decrease in food intake and a delay in fattening. In addition, the pellet feed falling over the frame 11 or the floating body 12 is easily wetted by waves and decayed, resulting in deterioration of the fish-farming environment.

In the case where these concerns exist, it is considered that the scattering range of the pellet feed should be limited to a certain area. In this case, it is recommended to use an impeller 40 in which a scattering member 45 having an inclination angle of 135 ° is attached to a rotating disk 41 having a diameter of 250mm at an attachment angle of 60 ° or 75 °.

< example 2>

Next, the shape of the scattering member 45 was examined.

The scattering members 45 used in example 2 were 3 types of the vane plates a, B, and C shown in fig. 9A to 9D.

As shown in fig. 9A, the blade plate a as the scattering member 45 has the inclined portion 45B longer than the mounting portion 45A. Specifically, the inclined portion 45B extends from both ends of the mounting portion 45A. The mounting hole 45C is provided in the same manner as the scattering member 45 of example 1. In addition, similarly to the scattering member 45 of example 1, the inclined portion 45B of the vane plate a has an inclination angle of 105 ° (see fig. 5C) and 135 ° (see fig. 5E).

As shown in fig. 9B, the inclined portion 45B of the louver plate B as the scattering member 45 is shorter than the mounting portion 45A. Specifically, the inclined portion 45B is cut away and shortened on the side closer to the axial center. The mounting hole 45C is provided similarly to the scattering member 45 of example 1. In addition, similarly to the scattering member 45 of example 1, the inclined portion 45B of the vane plate B has an inclination angle of 105 ° (see fig. 5C) and 135 ° (see fig. 5E).

As shown in fig. 9C, the blade plate C as the scattering member 45 is the same as the scattering member 45 of example 1 in that the inclined portion 45B and the attachment portion 45A have the same length. The mounting hole 45C is provided similarly to the scattering member 45 of example 1. However, as shown in fig. 9D, the inclination angle of the inclined portion 45B is 95 °.

In example 2, the following components were used as the impeller 40: in the turntable 41 shown in fig. 5A, as in fig. 6A or 6B, 2 or more scattering members 45 are mounted at positions facing the shaft hole 42. The impeller 40 was adjusted in 13 mounting modes as shown in table 2 below. The diameter of the rotary disk 41 (see fig. 5A) is 250 mm.

The types of the scattering members 45 used are the blade plate a in the mounting modes 15, 16, 19, and 20, the blade plate B in the mounting

modes

17, 18, 21, and 22, and the blade plate C in the mounting modes 23 to 27.

The inclination angle of the scattering members 45 is 135 degrees in the mounting modes 15 to 18 and 105 degrees in the mounting modes 19 to 22. The inclination angle in the mounting modes 23 to 27 is 95 °.

As for the installation angle of the scattering members 45, 60 ° in the installation modes 15, 17, 19, 21, and 26, 75 ° in the

installation modes

16, 18, 20, 22, and 27, 0 ° in the

installation mode

23, 20 ° in the

installation mode

24, and 40 ° in the installation mode 25.

In each of the above installation modes, the amount of the pellet feed dispersed in each of the areas I to IV was evaluated by visual observation based on the evaluation criteria in a state where the pellet feed is completely dispersed in the scattering area 50 under the above-described conditions. The results are shown in Table 2 below.

[ TABLE 2 ]

In the case of an inclination angle of 135 °, in the installation mode 15 using the vane plate a, the pellet feed is concentrated in the regions I and II, and less in the regions III and IV. The pellet feed was unevenly distributed and the scattering distance was shortened as compared with the installation pattern 4 of example 1.

In installation mode 16, which also uses vane plate a, the pellet feed is concentrated in zones I and II and less in zones III and IV. The distribution of the pellet feed was not uniform as compared with the installation pattern 4 of the example 1.

In the installation mode 17 using the vane plate B, the pellet feed is concentrated in the areas I and II. The pellet feed was wider and scattered more evenly than in the installation mode 15 under the same conditions except that the vane plates a were used. The pellet feed in zones III and IV was less.

In installation mode 18, which also uses vane plate B, pellet feed is concentrated in zones I and II. The pellet feed in zone II was further increased compared to the installation pattern 17 of the same condition except for the installation angle. The pellet feed in zones III and IV is minimal.

Then, in the case of the inclination angle of 105 °, in the installation mode 19 using the vane plate a, the pellet feed is concentrated in the regions I and II, and less in the regions III and IV.

In installation mode 20, which also uses vane plate a, the pellet feed is concentrated in zones I and II. Compared to the installation pattern 19 of the same conditions except for the installation angle, the pellet feed in the area II is more. Less pellet feed was found in zones III and IV.

In the installation mode 21 using the vane plate B, the pellet feed is concentrated in the areas I and II, and less in the area III. The pellet feed also flies outside the area IV. The scattering distance of the pellet feed becomes longer as compared with the installation mode 19 under the same conditions except for using the vane plate a.

In the installation mode 22, which also uses the vane panel B, the pellet feed is concentrated in zones I and II, and less in zones III and IV. The scattering distance of the pellet feed becomes longer as compared with the installation pattern 20 under the same conditions except that the vane plate a is used.

In the installation mode 23 using the vane plates C inclined at an angle of 95 ° and an installation angle of 0 °, pellet feed is concentrated in the area I. The pellet feed also scatters more to the outside of the area IV. The pellet feed in zones II and III was minimal. The flying distance increases even with the same mounting angle of the same rotating disk 41, as compared with the case of the inclination angles of 135 ° and 105 °.

In the installation mode 24, in which the vane plate C is also used and the installation angle is 20 °, the pellet feed is concentrated in the area I. The pellet feed also scatters more to the outside of the area IV. There is less pellet feed in zones II and III, particularly zone III. The fly-off distance increases even with the same rotating disk 41 and the same installation angle, compared to the case of the inclination angles of 135 ° and 105 °.

In the installation mode 25, in which the vane plate C is also used and the installation angle is 40 °, the pellet feed is concentrated in the area I. The pellet feed also flies outside the area IV. Pellet feed in region II increased. Less pellet feed is in zone III. The flying distance increases even with the same mounting angle of the same rotating disk 41, as compared with the case of the inclination angles of 135 ° and 105 °.

In the installation mode 26, in which the vane plate C is also used and the installation angle is 60 °, the pellet feed is concentrated in the areas I and II. Less pellet feed is in zone III. The pellet feed outside zone IV is greatly reduced. The fly-off distance increases even with the same rotating disk 41 and the same installation angle, compared to the case of the inclination angles of 135 ° and 105 °.

In the installation mode 27, in which the vane plate C is also used and the installation angle is 75 °, the granulated feed is concentrated in the areas I and II. There was more pellet feed in zone II compared to installation mode 26. Pellet feed in zone III increased. Pellet feed in zone IV was reduced. The flying distance increases even with the same mounting angle of the same rotating disk 41, as compared with the case of the inclination angles of 135 ° and 105 °.

As a summary of example 2, even if the scattering members 45 have the same inclination angle, the scattering range and uniformity of the pellet feed are changed according to the change in the length of the inclined portion 45B. However, the influence of the length of the inclined portion 45B on the scattering range and uniformity of the pellet feed varies depending on the inclination angle of the scattering member 45. That is, if the inclined portion 45B of the scattering member 45 having an inclination angle of 135 ° is extended, the scattering range of the pellet feed becomes narrow, and the uniformity is also deteriorated. On the other hand, if the inclined portion 45B of the scattering member 45 having an inclination angle of 105 ° is extended, the scattering range of the pellet feed becomes narrow and the uniformity is also deteriorated, but the degree thereof is small compared with the case of the inclination angle of 135 °.

In the case where the scattering members 45 having the same inclination angle are fixed to the same rotating disk 41 at the same mounting angle, the shorter the inclined portion 45B, the wider the scattering range of the pellet feed, and the better the uniformity.

The scattering members 45 (vane plates C) inclined at an angle of 95 ° make the pellet feed spread wider and more evenly than the scattering members 45 inclined at angles of 105 ° and 135 °.

< example 3>

In example 3, the following components were used as the impeller 40: in the rotary disk 41 shown in fig. 5A, 2 scattering members 45 are attached to positions facing the shaft hole 42, similarly to fig. 6A or 6B. The impeller 40 was adjusted in 10 mounting modes as shown in table 3 below. The diameter of the rotating disk 41 (see fig. 5A) is 280 mm.

As for the kinds of the scattering members 45 used, there are blade plates a in the mounting

modes

28, 29, 32, and 33, blade plates B in the mounting

modes

30, 31, 34, and 35, and blade plates C in the mounting modes 36 and 37.

The inclination angle of the scattering members 45 is 135 ° in the mounting modes 28 to 31 and 105 ° in the mounting modes 32 to 35. The inclination angle in the mounting patterns 36 and 37 is 95 °.

As for the installation angle of the scattering members 45, it is 60 ° in the

installation patterns

28, 30, 32, 34, and 36, and 75 ° in the

installation patterns

29, 31, 33, 35, and 37.

In each of the above installation modes, the amount of the pellet feed dispersed in each of the areas I to IV was evaluated by visual observation based on the evaluation criteria in a state where the pellet feed is completely dispersed in the scattering area 50 under the above-described conditions. The results are shown in table 3 below.

[ TABLE 3 ]

In the case of an inclination angle of 135 deg., the pellet feed is the most in the area I in the installation mode 28 using the vane plate a. The second most region of pellet feed is region II. The pellet feed in zones III and IV was less. The pellet feed is distributed widely and at a long distance and uniformly compared to the installation pattern 15 under the same condition except for the diameter of the rotating disk 41.

In the installation mode 29, which also uses the vane plate a, the pellet feed is the most in the area I. The second most region of pellet feed is region II. The pellet feed in the area II is increased compared to the installation pattern 16 of the same condition except for the diameter of the rotating disk 41. The pellet feed in zones III and IV was minimal. Compared with the installation mode 16, the pellet feed is distributed widely and has equal distance.

In the installation mode 30 using the vane plate B, the pellet feed is the most in the area I. The second most areas of pellet feed are areas II and IV. Less pellet feed is in zone III. The pellet feed is distributed widely and at a long distance and uniformly as compared with the installation pattern 17 of the same condition except the diameter of the rotating disk 41.

In the installation mode 31, which also uses the vane plate B, the pellet feed is the most in the area I. The second most region of pellet feed is region II. The third most area of pellet feed is area IV. The pellet feed in zone II is increased and the pellet feed in zone IV is decreased compared to the installation mode 30 using the same impeller 40. There was less pellet feed in zone III. The pellet feed is distributed widely and at a long distance and uniformly as compared with the installation pattern 18 under the same condition except the diameter of the rotating disk 41.

Next, in the case of the inclination angle of 105 °, the pellet feed in the area I is the most in the installation mode 32 using the vane plate a. The second most areas of pellet feed are areas II and IV. Less pellet feed is in zone III. The pellet feed is distributed widely and at a long distance and uniformly compared to the installation pattern 19 under the same conditions except for the diameter of the rotating disk 41.

In the installation mode 33, which also uses the vane plate a, the pellet feed is the most in the area I. The second most region of the pellet feed is region II. The third most region of pellet feed is region IV. The pellet feed in zone II is slightly increased and the pellet feed in zone IV is slightly decreased compared to the installation pattern 32 using the same impeller 40. Less pellet feed is in zone III. The pellet feed is distributed widely and at a long distance and uniformly compared to the installation pattern 20 under the same condition except for the diameter of the rotating disk 41.

In the installation mode 34 using the vane plate B, the pellet feed is the most in the area I. The second most region of pellet feed is region IV and the third most region of pellet feed is region II. There was less pellet feed in zone III. The pellet feed is distributed widely and at a long distance and uniformly compared to the installation pattern 21 under the same condition except for the diameter of the rotating disk 41.

In the installation mode 35, which also uses the vane plate B, the pellet feed is the most in the area I. The second most region of pellet feed is region II and the third most region of pellet feed is region IV. Less pellet feed is in zone III. The pellet feed is distributed widely and at a long distance and uniformly compared to the installation pattern 22 under the same condition except for the diameter of the rotating disk 41.

In the installation mode 36 using the vane plates C inclined at an angle of 95 °, the pellet feed in the area I is the most. The second most area of the pellet feed is area IV and the third most area of the pellet feed is area II. The pellet feed in zone III is minimal. The pellet feed flies widely and long compared to the installation pattern 26 under the same conditions except for the diameter of the rotating disk 41.

In the installation mode 37, which also uses the vane plates C, the most pellet feed is in zone I. The second most region of pellet feed is region II and the third most region of pellet feed is region IV. Less pellet feed is in zone III. The pellet feed flies widely and long compared to the installation pattern 27 under the same condition except for the diameter of the rotating disk 41.

To summarize example 3 above, increasing the diameter of the rotating disk 41 of the impeller 40 from 250mm to 280mm improves the uniformity of scattering of the granulated feed by the scattering members 45, and the scattering distance also increases. In the scattering members 45 inclined at 135 ° and 150 °, the shorter the length of the inclined portion 45B is, the better the scattering range and uniformity of the pellet feed are. In the scattering member 45 inclined at an angle of 95 °, the scattering range and uniformity of the pellet feed are good.

< example 4>

Next, the shape of the rotating disk 41 was investigated.

As shown in a modification of fig. 10, in the rotary disk 41 used in example 4, a notch 41C recessed toward the center is formed at 2 between the portions where the scattering members 45 are attached. The notch 41C is formed near the center by a base 41C1 and a recessed edge 41C2, the base 41C1 is parallel to an imaginary line segment connecting the proximal mounting holes 41A, and the recessed edge 41C2 is cut in the radial direction from both ends of the base 41C1 toward the peripheral edge. The gap 41C forms a circular arc portion 41D. The axial hole 42 is located on the extension of the recessed edge 41C2, and has a central angle of 60 °.

In example 4, the following components were used as the impeller 40: in the turntable 41 shown in fig. 10, 2 flyaway members 45 shown in fig. 5B and 9A to 9C are mounted at positions facing the shaft hole 42, similarly to fig. 6A or 6B. The impeller 40 was adjusted in 11 mounting modes shown in table 4 below. In addition, the diameter of the rotating disk 41 was 280 mm.

The types of the scattering members 45 used were the scattering members 45 (see fig. 5B) of example 1 described above in the mounting modes 38 to 42, the blade plates a in the mounting modes 43 and 44, the blade plates B in the mounting modes 45 and 46, and the blade plates C in the mounting modes 47 and 48.

The inclination angle of the scattering member 45 is 105 DEG in the mounting modes 38-46. The inclination angle in the mounting modes 47 and 48 is 95 °.

As for the mounting angles of the

scattering members

45, 0 ° in the mounting mode 38, 20 ° in the mounting mode 39, 40 ° in the mounting mode 40, 60 ° in the mounting

modes

41, 43, 45, and 47, and 75 ° in the mounting modes 42, 44, 46, and 48.

In each of the above-described installation modes, the pellet feed was visually evaluated based on the evaluation criteria, with the amount of the pellet feed dispersed in each of the areas I to IV being taken as the reference in a state where the pellet feed was completely dispersed in the scattering area 50 under the above-described conditions. The results are shown in Table 4 below.

[ TABLE 4 ]

In the case of using the scattering members 45 having the inclination angle of 105 ° in example 1, the pellet feed in the area I was the largest in the installation mode 38 having the installation angle of 0 °. The second most pellet feed is directly under and outside the impeller in zone IV. Pellet feed in zone II was third most abundant. There was less pellet feed in zone III.

In the mounting mode 39 at the mounting angle of 20 °, the scattering range of the pellet feed is the same as that in the mounting mode 38, but the pellet feed in the region II is slightly more than that in the mounting mode 38.

In the installation mode 40 at the installation angle of 40 °, the scattering range of the pellet feed is the same as that of the installation mode 39, but the pellet feed in the area II is further increased as compared with the installation mode 39.

In the installation mode 41 with an installation angle of 60 °, the amount of pellet feed in the areas I and II is approximately the same. Pellet feed in zone III was increased. More pellet feed is present directly under and outside the impeller in zone IV.

In the installation mode 42 at an installation angle of 75 °, the amount of pellet feed in the zones II and III is further increased compared to the installation mode 41.

In the case of using the vane plate a inclined at an angle of 105 °, in the installation pattern 43 at an installation angle of 60 °, the pellet feed in the regions I and II is the most and the distribution is also equalized. Zone III pellet feed was increased. More pellet feed is present directly under and outside the impeller in zone IV.

In the installation mode 44 with the installation angle of 75 degrees, the granulated feed in the areas I and II is more, and the distribution is also equal. The pellet feed in zone II was further increased compared to installation mode 43. The feed of the granules in the region III is less than that of the granules. More pellet feed is present directly under and outside the impeller in zone IV.

In the case of using the vane plate B inclined at an angle of 105 °, the pellet feed in the regions I and II is the most and the distribution is also equalized in the installation mode 45 at an installation angle of 60 °. Zone III had less pellet feed than it did. The outside pellet feed in region IV was more.

In the installation mode 46 with an installation angle of 75 deg., the pellet feed is more in the areas I and II and the distribution is also equal. The pellet feed in zone II was further increased compared to installation mode 45. The feed of the granules in the region III is less than that of the granules. More pellet feed was present outside zone IV.

In the case of using the vane plate C having an inclination angle of 95 °, the pellet feed in the regions I and II is more and the distribution is uniform in the installation pattern 47 having the installation angle of 60 °. The feed of the granules in the region III is less than that of the granules. More feed pellets were located directly under and outside the impeller in zone IV.

In the installation mode 48 with the installation angle of 75 degrees, the granulated feed in the areas I and II is more, and the distribution is also equal. The pellet feed in zone II was further increased compared to installation mode 47. The feed of the granules in the region III is less than that of the granules. More feed pellets were located directly under and outside the impeller in zone IV.

From the above results, as shown in fig. 10, in the mounting patterns 38 to 42 using the scattering member 45 of example 1 having the inclination angle of 105 ° in the case of using the impeller 40 having the rotating disk 41 of 280mm diameter having 2 notches 41C, the amount of pellet feed in the area II increases as the mounting angle increases.

In the case of the inclination angle of 105 ° and the mounting angle of 60 ° or 75 °, the effect of the difference in the length of the inclined portion 45B is not so large as long as the mounting patterns 41 to 46 are observed. However, when the results of the mounting patterns 45 and 46 using the vane plates B having the inclined portion 45B with a short length are compared with the mounting patterns 34 and 35 (see table 3) of example 3 using the same vane plate B in the impeller 40 without the notch portion 41C, the pellet feed dispersed from the impeller 40 to the farthest area II is large. This is considered to be caused by the collision of the pellet feed with the edge of the notch portion 41C of the impeller 40.

The case of the inclination angle of 95 ° is not much different from the case of the inclination angle of 105 °.

As described above, when the impeller 40 having the rotary disk 41 having a diameter of 280mm and having 2 notches 41C in example 4 was used, a large amount of pellet feed could be dropped near the 2 nd sensor 25B and the 3 rd sensor 25C.

As described above, when the center of the feeding apparatus 10 for raising fish is set as the center of the scattering area 50, it is considered that the following 2 points are important. First, the distribution range of the pellet feed is as wide and uniform as possible, and does not exceed the range inside the floating body 12 (see fig. 1). In order to appropriately grasp the appetite of fish in the fish pond, a large amount of pellet feed is equally distributed in the vicinity of each of the 3 appetite sensors 25. From these viewpoints, as in example 4, it is preferable to use an impeller 40 in which the scattering member 45 having an inclination angle of 95 ° or 105 ° is attached to the rotating disk 41 having a diameter of 280mm, in which the notch portion 41C having a center angle of 60 ° is provided at 2, at an attachment angle of 60 ° or 75 °.

< example 5>

The notch 41C in the rotary disk 41 used in embodiment 4 may have a shape as shown in a modification of fig. 11. In the rotary disk 41, a notch 41C is formed in the center of the disk 2 between the portions where the scattering members 45 are mounted. The notch 41C is formed near the center by a bottom edge 41C1 and a recessed edge 41C2, the bottom edge 41C1 is parallel to a virtual line segment connecting the proximal mounting holes 41A, and the recessed edge 41C2 is cut perpendicularly from both ends of the bottom edge 41C1 toward the peripheral edge. The gap 41C forms a circular arc portion 41D.

Claims

1. A feeding device for fish farming, characterized in that it has:

a feed tank disposed above the water surface;

a carrying path for carrying the pellet feed from the feed tank;

a flat plate-shaped impeller that is positioned at an end point of the conveyance path, rotates about a rotation axis provided at the center, and has an arc portion at least partially on a peripheral edge; and

a scattering member which is attached to an upper surface of the impeller and has a portion inclined to a side opposite to a rotation direction,

the inclination angle of the portion inclined to the opposite side of the rotation direction is an obtuse angle,

a plurality of the scattering members are arranged uniformly with respect to the rotating shaft,

a notch portion depressed toward the center direction is formed at a position 2 between the scattering members at the periphery of the impeller.

2. Feeding device for fish farming according to claim 1,

the scattering member is formed of a planar member.

3. Feeding device for fish farming according to claim 2,

the scattering member is attached to the upper surface of the impeller such that an extension line of an attachment direction thereof avoids the rotation shaft.

4. A feeding device for fish farming according to claim 1,

the flyaway member is provided with 2 flyaway members facing the rotary shaft.

5. A feeding device for fish culture according to any one of claims 1 to 4, wherein,

the conveyance path includes:

a cylindrical conveying drum;

a carrying-in port through which the pellet feed is carried into the conveying cylinder;

a carrying-out port for carrying out the granulated feed above the impeller; and

a conveying coil provided inside the conveying drum and conveying the pellet feed from the carrying-in port to the carrying-out port, the conveying coil being formed of a spiral metal wire rod,

the feeding coil includes one or both of a feed drop preventing blade for covering the carrying-out port by expanding the width of the metal wire rod in the axial direction at a portion corresponding to the carrying-out port and a clogging preventing blade for covering the carrying-in port by expanding the width of the metal wire rod in the axial direction at a portion corresponding to the carrying-in port.