JPH1133489A - Bivalves sorter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bivalves sorter capable of efficiently grade and sort bivalves, such as short-necked clams, by thicknesses (sizes). SOLUTION: Round rod sieves 31 which are arrayed with many pieces of round rods 32 for dropping small-piece scraps W at intervals widened toward the downstream side, convergent peak shaped comb teeth for dropping the small-sized short-necked clams Cs, tapered mesh openings which are widened in the intervals toward the downstream side and comb-tooth sieves 42 provided with comb tooth fixing parts and flat plates on which the short-necked clams C ride are lined up in a cascade form to 7 steps in a vibration trough 11. The first multistage comb-tooth sieves 41 in which the peak shaped comb teeth 42 on the upper stage side are positioned in nearly the central parts of the mesh openings of the lower stage side and the second multistage comb-tooth sieves 52 in which the comb-tooth sieves 52 having the large tapered mesh openings for dropping the middle-sized short-necked clams Cm are similar lined up are successively installed. The large-sized short-necked clams Cl are the plus sieve of the second multistage comb-tooth sieves 58.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for sorting bivalves, and more particularly to an apparatus for sorting bivalves according to their size.

[0002]

2. Description of the Related Art Conventionally, sorting of clams such as clams, clams, clams and the like according to the size of bivalves has been performed manually. However, especially when sorting a large amount of clams according to their size and packing them for retail use, the sorting speed by hand tends to be slower than the speed of the bagging device, and it is possible to classify by size. There is a request for a sorting device.

[0003] As an apparatus for sorting bivalves, a "quality screening apparatus for bivalves" according to Japanese Utility Model Application Laid-Open No. 63-20300 filed by the applicant of the present invention includes an apparatus for selecting non-defective bivalves, such as single shells and dead shells. A pass / fail sorting device for sorting non-defective products, garbage, and the like is disclosed, but this device is a device for sorting non-defective products and non-defective products, and is not a sorting device for classifying according to the size of bivalves. In other words, the screen used is one in which round bars are arranged in parallel at predetermined intervals,
It does not have a size sorting function.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to provide an apparatus capable of sorting clams such as clams according to their size. Large bivalves have a large thickness, but clams and the like are conventionally classified according to their thickness.

[0005]

Means for Solving the Problems The above-mentioned object is solved by the structure of claim 1. If the means for solving the problems is exemplified by an embodiment of the bivalve sorting apparatus of the present invention, FIG. In the vibration trough 11, a large number of round rods 32 for dropping and removing the clams H and other small debris W are arranged side by side while slightly widening them toward the downstream side. And a comb-shaped sieve 42 having an angled cross section perpendicular to the transfer direction and a tapered opening S1 having a tapered opening S1 which is widened toward the downstream side. Are arranged in seven stages in a cascade fashion from the downstream to the upper stage, the mountain-shaped comb teeth 44 on the upper side are located substantially at the center of the opening S2 on the lower side, and the downstream end of the comb-shaped sieve 42 on the upper side is located on the lower side. It is made to overlap above the flat plate 47W at the upstream end of the comb sieve 42. The first multi-stage comb-tooth sieve 41 is formed by dropping a small clam Cs below the sieve, and further has a tapered opening S2 larger than the tapered opening S1 of the first multi-stage comb-tooth sieve 41. Similarly, a second multi-stage comb sieve 51 which is formed by arranging comb teeth 52 in seven stages and drops a medium-sized clam Cm below the sieve is provided. It is made to be discharged as a sieve.

In the round bar sieve 31, the distance between the round bars 32 is increased toward the downstream side because the clams C that are conveyed while being sandwiched in a wedge shape with the mouth side down between the round bars 32 cause clogging. This is so as not to let them. FIG. 12 shows the first
FIG. 4 is a cross-sectional view of a part of the multi-stage comb sieve 41 (the same applies to the second multi-stage comb sieve 51). , A rib plate 45 that supports the top of the mountain-shaped comb teeth 44 from below, a flat plate 47 between the tops of the mountain-shaped comb teeth 44 at the upstream end of the mountain-shaped comb teeth 44, and Flat plate 4
7 and a comb-tooth fixing portion 46 having an upwardly inclined surface 48 extending from the lower portion on the upstream side to the upstream end of the flat plate 47.

Therefore, the set C which is conveyed while being deeply sandwiched between the tapered openings S1 which are widened at the downstream end of the upper-stage mountain-shaped comb teeth 44 is the lower-stage mountain-shaped comb teeth 4
4 climbs the inclined surface 48 of the comb tooth fixing portion 46 and the flat plate 47
, The upper-stage tapered aperture S
1 to avoid collision with the upstream end of the lower mountain-shaped comb tooth 44 located substantially at the center of the downstream end portion.
2 is smoothly transferred onto the top.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A bivalve sorting apparatus according to an embodiment of the present invention will be specifically described below with reference to the drawings.

FIG. 1 shows a small clam Cs and a medium-sized clam C after removing shells H and other small debris W from the clam C.
m is a side view of a clam sorting apparatus 1 according to an embodiment for sorting into large clams Cl, and FIG.
FIG. 3 is a front view. In the following, when the size is not distinguished, the set is C. With reference to FIGS. 1 to 3, a clam sorting apparatus 1 is supported and installed on a frame 2 composed of a column 3 of a mold steel and a beam 4 interposed between the columns. Then, the set C is transferred from left to right in the sorting apparatus 1 in FIG. An electromagnetic vibrator (not shown) is attached to the hopper 5 of the clam C fixed to the beam 4 on the left side, and a rubber goodwill 7 for adjusting the amount of delivery is attached to the lower outlet 6. Further, a guide plate 8 is provided in which a side wall portion of the hopper 5 is extended from both sides of the outlet 6 to the downstream side to prevent the set C from spreading more than necessary in the width direction.

A vibration trough 11 for sorting is provided so as to receive the lower end of the hopper 5, and the front and rear of the vibration trough 11 are suspended by the beam 4. That is, before and after the side walls 12 of the vibration trough 11 are respectively located before and after, a vibration-proof spring 13a and a spring receiver 14a having a known structure, and a similar vibration-proof spring 13
b and the spring receiver 14b are suspended from the beam 4.
A pair of vibration motors 16a and 16b are mounted on a mounting member 15 fixed to both side walls 12. As is well known, the vibration motors 16a and 16b have unbalanced weights fixed to both ends of the rotating shaft, and generate centrifugal force by rotation of the rotating shaft. However, the two rotating shafts are rotated in opposite directions. Generates a centrifugal force to give the vibrating trough 11 a linear vibration in the direction indicated by the arrow m (30 ° direction). Therefore, the set C is transferred from the left to the right in the vibration trough 11 as described above.

FIG. 4 shows [4]-[4] in FIG.
FIG. 5 is a sectional view taken along a line, and FIG.
[5] FIG. 5 is a cross-sectional view in the line direction. Referring to FIG. 4 and FIG.
In the vibrating trough 11, a horizontal receiving plate 17 is provided so as to receive the bottom of the hopper 5, a back plate 18 is provided at an upstream end thereof, and a downstream end of the receiving plate 17 is a round bar on the downstream side. It is overlapped on the sieve 31 by a length of 10 mm.

The round bar sieve 31 is a sieve for dropping and removing the shellfish H and other small debris W accompanying the clams C.
That is, the round bar sieve 31 arranges the round bar 32 having a length of 595 mm and a diameter of 6 mm in the center of the width of the trough 11 in the transport direction, and a pitch of 11.5 mm at the upstream end and 12.5 mm at the downstream end on both sides thereof. The round bars 32 are arranged at a pitch of. The sieve surface formed by the round bar 32 has an inclination angle of 7 degrees downward toward the downstream side, and the downstream end thereof is overlaid on the downstream first multistage comb-teeth sieve 41 by a length of 10 mm. Wrapped.

As shown in FIG. 8 described later, the round bar 3
2 are respectively supported by a vertical plate 33, and the vertical plate 33 is attached to two fixed pipes 34 in the width direction. FIG. 6 is a sectional view taken along the line [6]-[6] in FIG. 5, and FIG. 7 is a sectional view taken along the line [7]-[7] in FIG. The gap between the round bars 32 is slightly tapered, such as 5.5 mm at the upstream end and 6.5 mm at the downstream end.
Even if the paper is transported while being sandwiched between the two in a wedge shape, the transport clogging is prevented from occurring. Then, returning to FIG. 4, below the round bar sieve 31, the clam H independently of the vibrating trough 11,
A discharge chute 22 for other small chips W is attached to the column 3 of the frame 2, and a small chip receiver 23 is further provided below the discharge chute 22.

Referring to FIG. 4 and FIG.
A first multi-stage comb-shaped sieve 41 for dropping a small clam Cs under the sieve is connected to the downstream side. In the first multi-stage comb-tooth screen 41, seven-stage comb-tooth screens 42 are arranged in a cascade manner with a step of 10 mm, and the downstream end of the upper-side comb-tooth screen 42 is connected to the lower-stage comb-tooth screen 42. Plate 47W at the upstream end of the
Is overlapped by 10 mm. And
FIG. 8 is a perspective view showing the upstream round bar sieve 31 and the first multistage comb-teeth sieve 41. The comb-teeth sieve 42 is formed by arranging the comb-teeth units 43 at a pitch of 27 mm in the width direction. Of the comb tooth unit 43, the cross section perpendicular to the transfer direction is a mountain-shaped comb tooth 44 having a tapered shape, a flat plate 47 between the tops of the mountain-shaped comb teeth 44, and the top of the mountain-shaped comb tooth 44 supported from below. And a comb fixing portion 46 integral with the rib plate 45.

The comb-tooth fixing portion 46 has an upwardly inclined surface 4 extending from below the upstream side of the flat plate 47 to the upstream end of the flat plate 47.
8 is formed in an angle shape. The size of the flat plate 47 is 27 mm in width and 28 mm in length.
The interval between them is 7 mm wide at the base side of the mountain-shaped comb teeth 44, 11 mm wide at the downstream end of the flat plate 47, and 17 mm wide at the tip of the mountain-shaped comb teeth 44, and is a tapered opening S1 that expands downstream. ing. This is the most efficient posture for sorting clam C by its thickness, namely clam C
Are transported between the mountain-shaped comb teeth 44 in a state of being wedge-shaped between the tapered openings S1 with the mouth side down, and even if transported in that state, transfer clogging occurs. Not to be. The flat plate 47 is aligned on the same plane in the width direction to form a long flat plate 47W, and the sieving surface formed by the comb-teeth sieve 42 is
The angle of inclination is 7 degrees downward toward the downstream side together with 7W.

Further, the comb-shaped sieves 42 of the respective stages are mounted such that the mountain-shaped comb teeth 44 of the upper-staged comb-shaped sieve 42 are located substantially at the center of the tapered opening S1 of the lower-stage comb-shaped sieve 42. Have been. FIG. 10 is a cross-sectional view taken along the line [10]-[10] in FIG. 5, that is, a cross-sectional view of the first multi-stage comb-teeth sieve 41. And a situation where the set C is conveyed in a tapered opening S1 between the chevron-shaped comb teeth 44 while being sandwiched in a wedge shape with the mouth side down. FIG. 10 shows a clam C ′ riding on a flat plate 7 which will be described later, and the clam C ′ naturally rolls over in a direction indicated by an arrow, for example.

FIG. 12 shows [12] in FIG.
FIG. 13 is a sectional view taken along the line [−12] and shows the positional relationship between the upper comb tooth unit 43 and the lower comb tooth unit 43. The tapered opening S1 of the upper chevron comb tooth 44 is not shown. The clam C is widened toward the downstream side (17 mm in width at the tip of the mountain-shaped comb teeth 44), and is transported while being sandwiched deeply at the downstream end, and at the downstream end of the tapered opening S1. At the approximate center, the upstream end of the lower mountain-shaped comb tooth 44 is present. Therefore, when the comb tooth fixing portion 46 shown in FIG. It cannot move into the opening S1. Therefore, each mountain-shaped comb tooth 4
At the upstream end of 4, an angle-shaped comb tooth fixing portion 46 having an inclined surface 48 is provided together with a flat plate 47 between the mountain-shaped comb teeth 44. Therefore, the set C, which is transported while being deeply sandwiched between the tapered openings S1 that are widened at the downstream side of the upper mountain-shaped comb teeth 44, climbs on the inclined surface 48 and rides on the flat plate 47 to be rolled over, and the lower mountain is moved. It is smoothly transferred to the top of the mold comb teeth 44.

The downstream end of the lowermost comb-tooth sieve 42 is overlapped by 10 mm on the downstream side of the second multi-tooth comb-tooth sieve 51. Although not shown, each comb sieve 42 is fixed to both side walls 12 of the vibrating trough 11 at both ends.
Returning to FIG. 4, a discharge chute 24 of a small clam Cs is attached to the column 3 of the frame 2 below the first multistage comb-teeth sieve 41 independently of the vibration trough 11, and further below the same. Is provided with a belt conveyor 25 for conveying small clams Cs.

Still further, referring to FIG. 4 and FIG.
Downstream of the multi-stage comb-teeth screen 41, a second multi-stage comb-teeth screen 51 for dropping a medium-sized clam Cm under the screen is connected. The second multi-stage comb sieve 51 has, similarly to the first multi-stage comb sieve 41, seven comb-tooth sieves 52 arranged in a cascade through a step of 10 mm. The downstream end is a flat plate 57 at the upstream end of the lower comb 52.
It is overlapped by a length of 10 mm above W.
FIG. 9 is a perspective view of a connection portion between the first multi-stage comb tooth screen 41 and the second multi-stage comb tooth screen 51.
3 are arranged at a pitch of 31 mm in the width direction.
Each comb tooth unit 53 supports, like the comb tooth unit 43 of the first multistage comb tooth sieve 41, a mountain-shaped comb tooth 54 having a tapered cross section and a tapered mountain-shaped tooth 54 from below. It is composed of a rib plate 55, a flat plate 57 between the mountain-shaped comb teeth 54, and a comb tooth fixing portion 56 integral with the rib plate 55.

The comb-tooth fixing portion 56 has an upwardly inclined surface 5 extending from a lower portion on the upstream side of the flat plate 57 to an upstream end of the flat plate 57.
8 is formed in an angle shape. The size of the flat plate 57 is 31 mm in width and 28 mm in length.
The interval between them is 11 mm in width at the base of the chevron 54,
The downstream end of the flat plate 57 has a width of 15 mm, and the tip of the mountain-shaped comb tooth 54 has a tapered opening S2 having a width of 21 mm and extending toward the downstream side. The transfer clogging does not occur even if the transfer is carried out with the mouth side down between the teeth 54 and sandwiched between the tapered openings S2. The flat plate 57 is aligned on the same plane in the width direction and has a long flat plate surface 57W.
Is formed, and the sieve surface formed by the comb-teeth sieve 52 has an inclination angle of 7 degrees downward toward the downstream side together with the flat plate 57W. The function of the inclined surface 58 and the flat plate 57 in the comb tooth fixing portion 56 of the mountain-shaped comb tooth 54 and the rib plate 55 is the same as that of the inclined surface 48 of the comb tooth fixing portion 46 and the flat plate 4 described in FIG.
7 works in the same way.

The comb sieves 52 of each stage are mounted such that the mountain-shaped comb teeth 54 of the upper comb tooth sieve 52 are located at the center of the tapered aperture S2 of the lower comb sieve 52. ing. FIG. 11 is a cross-sectional view taken along the line [11]-[11] in FIG. 5, that is, a cross-sectional view of the second multistage combteeth sieve 51. , And a comb-shaped sieve 52 of the second multi-stage comb-shaped sieve 51. The downstream end of the lowermost comb sieve 52 is overlapped with the discharge end plane 19 of the vibrating trough 11 by a length of 10 mm. Each of the comb sieves 52 is fixed to the side wall 12 of the vibrating trough 11 at both ends in the same manner as the comb sieve 42. Further, as shown in FIG. 4, below the second multi-stage comb-teeth sieve 51, a discharge chute 26 of a medium-sized clam Cm is attached to the frame 2 independently of the vibrating trough 11, and below the medium-sized set Cm. A belt conveyor 27 for transporting the set Cm is provided.

Still further, referring to FIGS. 3, 4 and 5, a large clam Cl discharged through the discharge end flat surface 19 of the vibrating trough 11 as a top of the second multi-stage comb-tooth sieve 51 will be described.
A discharge chute 28 is fixed to the column 3 of the frame 2, and a belt conveyor 29 for transporting a large clam Cl is provided below the discharge chute 28.

The clam sorting apparatus 1 of the present embodiment is configured as described above. Next, the operation thereof will be described.

Referring to FIGS. 1 to 3 and particularly to FIG. 1, the vibration motors 16a and 16b of the clam sorting apparatus 1 are energized to give the vibration trough 11 linear vibration in the direction indicated by the arrow m. I do. The set C for sorting is put into the hopper 5 using a crane or the like (not shown). The clam C contains a shell H, a dead shell, and other small chips W. The dead shell breaks into a shell H by the impact at the time of input and by the vibration in the hopper 5 thereafter. When an electromagnetic feeder (not shown) of the hopper 5 is activated, the clams C in the hopper 5 are quantitatively cut out, and pass through a rubber goodwill 7 from a delivery port 6 of the hopper 5 as shown in FIGS. Vibration trough 1 receiving the lower end of 5
It is sent out onto the round bar sieve 31 through one horizontal receiving plate 17. The guide plates 8 provided on both sides of the outlet 6 prevent the set C from being unnecessarily spread in the width direction.

While the clam C is being transferred on the round bar sieve 31, the shells H and other small chips W are dropped from between the round bars 2 and eliminated. As shown in FIGS. 6 and 7 which are cross-sectional views of the upstream portion and the downstream portion of the round bar sieve 31, the clam C is in a posture lying on the round bar 32 or between the round bars 32 with the mouth side down. It is transported sandwiched between wedges. However, since the interval between the round bars 32 is slightly widened toward the downstream side, the set C sandwiched in a wedge shape does not cause transfer jam. The shell H and other small chips W as the sieve under the round bar sieve 31 pass through the discharge chute 22 shown in FIGS.
It falls inside and is housed.

The clam C that has passed through the round bar sieve 31 is transferred to a first multi-stage comb tooth sieve 41 shown in FIGS. 4 and 5 for selecting small clams Cs. At this time, as shown in FIG. 8, since the downstream end of the round bar 32 is overlapped on the flat plate 47W of the uppermost comb-tooth sieve 42 of the first multi-stage comb-tooth sieve 41, the round bar sieve 31 It does not fall between the first multi-stage comb-shaped sieve 41. As shown in FIG. 10, the clam C is caught in a wedge shape with the mouth side down on the comb-shaped sieve 42 of the first multistage comb-shaped sieve 41 between the tapered openings S1 between the chevron-shaped comb teeth 44. Since they are transferred, sorting by thickness is performed efficiently. Also, no clogging occurs during the transfer.

The clam C is the first multi-stage comb tooth screen 41
While being transferred from the uppermost comb-to-top sieve 42 to the lowermost seventh-tooth comb-tooth 42, as shown in FIG.
The tapered aperture S1 between the upper mountain-shaped comb teeth 44 is transported while being sandwiched in a wedge shape, and climbs from the downstream end of the inclined surface 48 of the comb tooth fixing portion 46 of the lower mountain-shaped comb tooth 44. After climbing over and overturning on 47, the tape is repeatedly transported while being sandwiched in a wedge shape at the tapered openings S1 between the lower mountain-shaped comb teeth 44 again. Thus, the first multi-stage comb-tooth sieve 4
During the transfer on the top 1, the small clam Cs, which is thinner than the tapered opening S1, is discharged from the tapered opening S1 as a sieve, but the sorting accuracy is extremely high. That is, even if a small clam Cs passes over the tapered aperture S1, it is rolled over and transferred to the lower tapered aperture S1, and the lower mountain-shaped comb tooth is formed. This is because there is a high rate of being transported while being sandwiched between wedges 44 in a wedge shape. Then, the sorted small clams Cs drop onto the belt conveyor 25 of the small clams Cs via the discharge chute 24 shown in FIG. 4, and are conveyed to a dedicated bag filling device.

On the other hand, medium-sized clams Cm and large clams Cl which do not fall at the tapered openings S1 of the first multi-stage comb-tooth sieve 41 are placed on the lowermost comb-tooth sieve 42 of the first multi-stage comb-tooth sieve 41. After being transferred from the downstream end onto the flat plate 57W formed at the upstream end of the uppermost comb tooth sieve 52 of the second multistage comb tooth sieve 51 connected thereto, the uppermost comb tooth Sieve 5
While being sequentially transferred from 2 through the lower comb sieve 52,
It is exactly the same as the case of the first multi-stage comb-tooth sieve 41 that the medium-sized set Cm falls down from the tapered aperture S2 as a sieve under the second multi-stage tooth-comb sieve 51 and is sorted out. Then, the selected medium-sized clams Cm fall through the discharge chute 26 shown in FIG. 4 onto the belt conveyor 27 of the medium-sized clams Cm, and are conveyed to a dedicated bag filling device.

The large clams Cl which do not fall at the tapered openings S2 of the second multi-stage comb-tooth sieve 51 are discharged from the downstream end of the lowermost stage of the comb-tooth sieve 52 on the sieve. The discharged large clams Cl are transferred into the chute 28 through the discharge plane 19 of the vibrating trough 11, slide down the slope thereof, fall onto the belt conveyor 27 of the large clams Cl, and enter a special bag. It is transported to the filling device.

Although the clam sorting apparatus 1 according to the embodiment of the present invention is constructed and operates as described above, the present invention is not limited to this, and various modifications are possible based on the technical idea of the present invention. is there.

For example, in the present embodiment, the clam sorting apparatus 1 has been exemplified, but the distance between the round bars 32 of the round bar sieve 31,
By changing the size of the tapered openings S1 of the first multi-stage comb-teeth sieve 41 and the size of the tapered openings S2 of the second multi-stage comb-teeth sieve 51, sorting can be performed according to the size of stagnation and clams.

In the present embodiment, the round bar sieve 31 is used.
Is provided with a first multi-stage comb-teeth sieve 41 and a second multi-stage comb-teeth sieve 51 on the downstream side, and the clams C are sorted into three types: a small clam Cs, a medium-sized clam Cm, and a large clam Cl. ,
It is also possible to sort only the first multi-stage comb-tooth sieve 41 into two types, small, medium and large.

In the present embodiment, in the first multistage comb-teeth sieve 41 (the second multistage comb-teeth sieve 51 is also the same), the comb tooth fixing part 4 having the flat plate 47 and the inclined surface 48 on the mountain-shaped comb teeth 44.
6 is provided, and the set C which is conveyed while being nipped deeply in a wedge shape by the tapered opening S1 on the upper stage side is provided with the tapered opening S1.
1 is located at the substantially center of the downstream end of the lower comb-shaped tooth 4
4 can be prevented from colliding with the upstream end, but if the first multi-stage comb-teeth sieve 41 is willing to increase in thickness, the upper-stage mountain-shaped comb teeth 44 and the lower-stage comb tooth 44 can be avoided. The flat plate 47 and the inclined surface 48 may be omitted by increasing the level difference from the mountain-shaped comb teeth 44.

[0034]

The bivalve sorting apparatus of the present invention is embodied in the above-described manner, and has the following effects.

In order to transfer the bivalves in a posture suitable for sorting based on the thickness of the bivalves, that is, a posture in which the mouth side is down, the comb-shaped sieve employs a mountain-shaped comb tooth, so that the thickness of the bivalves is large. The most effective grading can be performed.
Further, since the comb-shaped sieve employs a tapered aperture, even when the bivalve is transported sandwiched in a wedge shape with the mouth side down, transport clogging does not occur.

Further, the comb-shaped sieves are arranged in a cascade to form a multi-stage comb-shaped sieve, and the upper mountain-shaped comb teeth are located substantially at the center of the lower-stage tapered openings, and the upstream end of the mountain-shaped comb teeth is arranged. In the part, the mountain-shaped comb teeth are fixed by a flat plate serving as a spacer at the top of the mountain-shaped comb teeth and a comb-tooth fixing part having an inclined surface extending from the downstream side below the flat plate to the upstream end of the flat plate. Bivalve conveyed through the tapered aperture of the comb tooth sieve climbs on the inclined surface of the fixed part of the comb tooth of the lower mountain-shaped comb tooth, climbs on the flat plate, and repeatedly transitions to the tapered aperture of the lower row As it is done, bivalves are sorted with high sorting accuracy.

[Brief description of the drawings]

FIG. 1 is a side view of a clam sorting device.

FIG. 2 is a plan view of the same device.

FIG. 3 is a front view of the same device.

FIG. 4 is a sectional view taken along line [4]-[4] in FIG.

FIG. 5 is a sectional view taken along line [5]-[5] in FIG.

6 is a sectional view taken along line [6]-[6] in FIG.

FIG. 7 is a sectional view taken along the line [7]-[7] in FIG.

FIG. 8 is a perspective view of the vicinity of a connection portion between the round bar sieve and the first comb tooth sieve.

FIG. 9 is a perspective view of the vicinity of a connection between a first comb and a second comb.

10 is a sectional view taken along the line [10]-[10] in FIG.

11 is a sectional view taken along the line [11]-[11] in FIG.

12 is a sectional view taken along the line [12]-[12] in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clam sorter 5 Hopper 11 Vibration trough 16 Vibration motor 17 Receiving plate 31 Round bar sieve 41 First multi-stage comb tooth sieve 44 Mountain-shaped comb tooth 46 Comb tooth fixing part 47 Flat plate 48 Inclined surface 51 Second multi-stage comb tooth sieve

Claims (8)

[Claims] 1. A round bar sieve in which a large number of round bars are arranged in the transport direction for dropping and removing single shells and other small debris, and a relatively small bivalve connected to a downstream side thereof is sieved. And a comb-shaped sieve for discharging and selecting the relatively large bivalve as a sieve on the sieve and provided in a vibrating trough. 2. An interval between the round bars of the round bar sieve is slightly widened from an upstream side to a downstream side, and the bivalves conveyed between the round bars in a wedge shape with a mouth side down. 2. The occurrence of clogging due to rust is prevented.
2. The bivalve sorting apparatus according to 1. 3. The comb-type sieve includes a plurality of comb-type sieves cascaded in a transfer direction in a multi-stage manner, and the comb teeth of the upper-side comb-type sieve are substantially at the center of the aperture of the lower-side comb-type sieve. The multi-stage comb sieve in which the downstream end of the upper comb side sieve is arranged so as to overlap above the upstream end of the lower comb side sieve. Item 2. The bivalve sorting apparatus according to Item 1 or 2. 4. The multi-stage comb-tooth sieve has a cross section perpendicular to the transfer direction which is a mountain-shaped and tapered mountain-shaped comb tooth, and an opening between the mountain-shaped comb teeth is an upstream side. It is a tapered opening that is expanded in a tapered shape from the downstream side to the downstream side, and the bivalves are transported in a posture suitable for sorting by thickness, that is, the bivalves are sandwiched in a wedge shape with the mouth side down. 4. The bivalve sorting apparatus according to claim 3, wherein clogging of the bivalves is prevented. 5. At the upstream end of the chevron comb, a flat plate is provided between the tops of the chevron combs, and has an upwardly inclined surface extending from below the upstream side of the flat plate to the upstream end of the flat plate. The bivalve shell is provided together with the comb tooth fixing portion, and the bivalve shell, which is conveyed while being sandwiched deeply in a wedge shape by the tapered opening widened at the downstream end of the mountain-shaped comb tooth on the upper stage, is provided on the lower stage. By climbing up the inclined surface of the comb tooth fixing portion of the mountain-shaped comb teeth and riding on the flat plate, the lower-stage side mountain-shaped comb teeth located substantially at the center of the downstream end of the tapered opening The bivalve sorting device according to claim 4, wherein the clam is smoothly transferred onto the top of the mountain-shaped comb teeth on the lower side while avoiding collision with an upstream end. 6. A plurality of multistage comb teeth sieves having different sizes of the tapered openings are connected so that the size of the tapered openings increases toward the downstream side. 6. The bivalve sorting apparatus according to 4 or 5. 7. The multistage comb in which the round bar sieve and one or more of the multistage combteeth sieves are connected, wherein the downstream end of the round bar sieve or the multistage combteeth sieve is directly downstream. The bivalve sorting apparatus according to any one of claims 3 to 6, wherein the bivalve sorting apparatus is configured to overlap above an upstream end portion of the sieve. 8. The bivalve sorting device according to claim 1, wherein the bivalve sorting device is a clam sorting device.