CN214988048U - Net chain conveyor - Google Patents

Abstract

The utility model relates to a net chain conveyor, which comprises a rotary drum, wherein a net chain is spirally wound on the periphery of the rotary drum, a plurality of rotary drum vertical rods are uniformly arranged along the circumference of the rotary drum, each driving vertical rod is respectively fixed on the outer vertical surface of the corresponding rotary drum vertical rod, and each chain link of the net chain is respectively provided with a driving head meshed with the driving vertical rod near the inner side of the rotary drum; the inner edge of the driving head is in a convex arc shape, and arc grooves matched with the driving upright rods are arranged on two sides or one side of the driving head; one end of each rotating drum vertical rod is fixed with a guide block, and the guide block is positioned at the bottom of the rotating drum of the ascending screw or at the top of the rotating drum of the descending screw; the net chain enters the arc spiral section from the straight line advancing section through the turning transition section, and the driving head on the inner side of each chain link of the turning transition section abuts against the guide block to slide. The guide block can comprise a guide arc surface and a guide inclined arc surface, and can also be an elastic guide block. The net chain conveyor occupies small area, and the net chain runs smoothly and turns smoothly, and can keep stably going forward in a loose state.

Description

Net chain conveyor

Technical Field

The utility model relates to a conveyer, in particular to net chain conveyor belongs to conveying equipment technical field.

Background

The production line of baked food needs to bake food at high temperature, the high-temperature food taken out of the oven cannot be packaged immediately, and needs to be cooled and conveyed for a long time, and then the food is packaged after being completely cooled. The mesh chain conveyor provides a long conveying distance under the condition of small occupied area, so that longer cooling time can be obtained, and the mesh chain conveyor is widely applied to the food baking industry.

The existing net chain conveyor has the following defects: when the section got into the turn changeover portion from straight line was marchd to the net chain, the net chain inboard need be drawn close each other in order to adapt to the change of outside girth, current screw conveyer takes place the meshing in the turn changeover portion easily and is not smooth, perhaps when the net chain inboard did not adapt to outside girth change yet, the drive head in advance with the meshing of drive pole setting, it is spacing to make the net chain inboard receive the reverse of actuating lever, the section of marcing to the inboard traction of turn changeover portion of straight line is limited, the inboard continuous not adaptation of net chain is accumulated to certain extent and can be made the length in the net chain outside be less than theoretical girth, make the net chain outside tight.

In order to reduce the occurrence of the above phenomenon, the existing net chain conveyor can realize the meshing of the driving head at the inner side of the net chain and the driving vertical rod only by means of a complex auxiliary structure, and can smoothly complete the meshing of the driving head and the driving vertical rod only by the sufficient angle and height of the net chain which advances along the tower body.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a first-line aim at overcomes the problem that exists among the prior art, provides a net chain conveyer, and area is little, and the net chain operation and turn are smooth and easy, can keep steadily advancing at the lax state.

In order to solve the technical problem, the utility model discloses a net chain conveyor, including the rotary drum, the net chain is the heliciform winding in the periphery of rotary drum, evenly is equipped with many rotary drum montants along the circumference of rotary drum, and each drive pole setting is fixed respectively in the outer facade of corresponding rotary drum montant, each chain link of net chain is close to the inboard of rotary drum and is equipped with the drive head that meshes with drive pole setting respectively; the inner edge of the driving head is in a convex arc shape, and arc grooves matched with the driving upright rods are formed in two sides or one side of the driving head; one end of each rotating drum vertical rod is fixed with a guide block, and the guide block is positioned at the bottom of the rotating drum of the ascending screw or at the top of the rotating drum of the descending screw; the net chain enters the arc spiral section from the straight line advancing section through the turning transition section, and the driving head on the inner side of each chain link of the turning transition section abuts against the guide block to slide.

As the utility model discloses an improvement, each guide block is equipped with smooth transition's direction arc surface and direction inclined arc surface respectively, direction arc surface and rotary drum coaxial line and radius equal to or are less than the rotary drum radius, the direction arc surface of spiral that rises is downward, the direction arc surface of spiral that descends up, each drive pole setting of spiral that rises inserts and extends to direction arc surface bottom from the middle part of direction inclined arc surface width direction, each drive pole setting of spiral that descends inserts and extends to direction arc surface top from the middle part of direction inclined arc surface width direction, the outer fringe of each drive pole setting is tangent with the direction arc surface.

As the utility model discloses a further improvement, the inboard adjustment position of network chain that the network chain outside of turn changeover portion was forced to relax, the inboard direction arc surface along the guide block of network chain slides until the girth in the inboard adaptation network chain outside of network chain after, the inboard drive head of network chain just meshes with corresponding drive pole setting.

As a further improvement of the present invention, the guide block is an elastic guide block, the elastic guide block is provided with an arc-shaped convex ridge, the arc-shaped convex ridge is inclined toward the advancing direction of the net chain, the lower end of each driving vertical rod of the ascending screw is spliced with the arc-shaped convex ridge, and the upper end of each driving vertical rod of the descending screw is spliced with the arc-shaped convex ridge; the outer edge of each arc-shaped convex ridge is flush with the outer edge of the driving vertical rod, or the outer edge of each arc-shaped convex ridge is higher than the outer edge of the driving vertical rod.

As a further improvement of the utility model, the back surface of the elastic guide block is embedded in a vertical caulking groove of a corresponding drum vertical rod, a vertical tenon is arranged in the middle of the vertical caulking groove in the width direction, and the vertical tenon is embedded in the elastic guide block caulking groove on the back surface of the elastic guide block; a floating spring is embedded in the vertical tenon, and the other end of the floating spring is embedded in a counter bore of the elastic guide block.

As the utility model discloses a further improvement, the inboard adjustment position of network chain that the network chain outside of turn changeover portion was forced to relax, the inboard arc convex ridge along the elastic guide piece of network chain slides until the girth in the inboard adaptation network chain outside of network chain after, the inboard drive head of network chain just meshes with corresponding drive pole setting.

As a further improvement, the rotary drum is equipped with two side by side, and the ascending spiral of left side rotary drum is gone into after the changeover portion that turns to the right to the net chain input section of net chain, gets into the net chain changeover portion right along the tangential from the upper portion of left side rotary drum, the descending spiral of right side rotary drum is gone into after the changeover portion that turns to the right to the net chain changeover portion, gets into the net chain output section right along the tangential from the lower part of right side rotary drum, net chain output section gets into net chain return stroke section to a left side after turning to the right wheel, the left end of net chain return stroke section walk around the left directive wheel with the net chain input section links to each other.

Compared with the prior art, the utility model discloses following beneficial effect has been obtained: 1. each driving upright rod at the periphery of the rotary drum is embedded into the circular arc groove of the driving head, so that the effect of meshing transmission is achieved, and the driving head can be prevented from slipping outwards. When the rotary drum rotates, the driving upright posts drive the net chains to synchronously rotate.

2. Set up the guide block at the entry end of rotary drum montant, take the spiral that rises as an example, the drive pole setting extends to direction arc surface bottom and outer fringe and direction arc surface tangent, the drive pole setting is hidden in the direction arc surface, make the drive head can freely slide along the direction arc surface, so that the net chain outside forces the inboard adjustment position of slack net chain, do not receive the interference of drive pole setting, after the girth in the inboard complete adaptation outside of net chain, the drive head rises to the position of direction oblique arc surface along with the net chain, with the drive pole setting meshing of pegging graft on direction oblique arc surface, direction oblique arc surface provides the meshing space for the both sides of drive pole setting.

3. In another embodiment of the transition section of the net chain entering the turning, an elastic guide block is arranged at the inlet end of the vertical rod of the rotary drum, for example, a descending spiral, and the upper end of each driving vertical rod is spliced with the arc-shaped convex ridge of the elastic guide block; the driving head can freely slide along the arc-shaped convex ridge, so that the position of the inner side of the net chain which is forced to relax outside the net chain is adjusted without being interfered by the driving upright rod, and after the inner side of the net chain completely adapts to the perimeter of the outer side, the driving head descends to the upper end of the driving upright rod along with the net chain and enters into engagement.

4. The cooperation of the vertical caulking groove of elasticity guide block both sides and rotary drum montant to and the cooperation of vertical tenon and elasticity guide block caulking groove makes the elasticity guide block can float at the diameter direction of rotary drum, floating spring provides outside elasticity for the elasticity guide block, can compensate net chain radius of gyration's error, make the net chain changeover portion keep certain tension, especially to two tower structures, the net chain of left side rotary drum export can normally screw out, there is not the pendulum phenomenon that stops, the elasticity of elasticity guide block can compensate net chain screw out and the error of precession between the two towers, make the net chain inboard can keep laminating mutually with the arc convex ridge of elasticity guide block, arc convex ridge atress falls back on the rotary drum montant, the net chain continues to revolve and then passes through smoothly on the drive pole setting of below and mesh.

Drawings

The invention will be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.

Fig. 1 is a perspective view of the net chain conveyor of the present invention;

fig. 2 is a three-dimensional cross-sectional view of the net chain conveyor of the present invention;

fig. 3 is a front view of the net chain conveyor of the present invention;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a rear view of FIG. 3;

FIG. 6 is a cross-sectional view taken along A-A of FIG. 4;

FIG. 7 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 8 is a view of the state of the net chain engaging the drive uprights through the turning transition section with the guide blocks;

fig. 9 is a perspective view of the lower end of the driving upright rod inserted from the guide oblique arc surface and extending to the bottom of the guide arc surface;

FIG. 10 is a perspective view of the lower end of the driving vertical rod provided with an elastic guide block;

fig. 11 is an exploded view of the portion of the resilient guide block engaged with the vertical rod of the drum.

In the figure: 1. a rotating drum; 1a, a drum central shaft; 1b, rotating drum vertical bars; 1b1, vertical caulking groove; 1b2. vertical tenon; 1c, drum sprocket; 1d, driving the vertical rod; 1e, a left cylinder guide block; 1f, a right cylinder guide block; 1f1. guide the arc surface; 1f2. guide the oblique cambered surface; 1g, an elastic guide block; 1g1. arc ridge; 1g2. elastic guide block caulking groove; 1g3. floating spring;

2. a network chain; 2a, a network chain input section; 2b, a network chain transition section; 2c, a network chain output section; 2d, a network chain return section; 2e, a net chain tensioning section; 2f, driving the head;

3. a drive chain; 4. a left steering wheel; 5. a right steering wheel; 6. a main drive motor reducer; 7. a main drive sprocket; 8. a tension sprocket; 9. a network chain auxiliary motor; 10. a frame; 10a, a column; 10b, radial support bars; 10c. spiral circular track.

Detailed Description

In the following description of the present invention, the terms "front", "rear", "left", "right", "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not mean that the apparatus must have a specific orientation, and the present conveyor may be arranged as a mirror image of the illustrated orientation.

As shown in fig. 1 to 7, the mesh chain conveyor of the present invention includes a rotating drum 1, a mesh chain 2 spirally winds around the periphery of the rotating drum 1 and synchronously rotates along with the rotating drum 1, driving heads 2f extending towards the drum direction are respectively arranged at the inner sides of the links of the mesh chain 2 close to the rotating drum 1, the inner edges of the driving heads 2f are convex arc-shaped, arc grooves matched with the driving vertical rods 1d are arranged at two sides or one side of the driving heads 2f, and the driving vertical rods 1d are uniformly distributed at the periphery of the rotating drum 1 and meshed with the driving heads 2f at each layer; each driving upright rod 1d is embedded into the arc groove of the driving head 2f, thereby not only playing the role of meshing transmission, but also avoiding the driving head 2f from slipping outwards. The bottom of each layer of net chains 2 is respectively supported on a spiral ring rail 10c to slide, a filler strip can be embedded on the spiral ring rail 10c to reduce the sliding resistance when each layer of net chains 2 rotates, each layer of spiral ring rail 10c is respectively fixed on a radial support rod 10b, the outer end of each radial support rod 10b is respectively fixed on an upright post 10a, and each upright post 10a is uniformly distributed by taking the axis of a rotary drum as the center. When the rotary drum 1 rotates, the driving upright posts 1d drive the net chains 2 to synchronously rotate.

The net chain 2 enters the arc spiral section from the straight line advancing section through the turning transition section, chain pins of the straight line advancing section are parallel to each other, and the chain pins of the arc spiral section are distributed in a fan shape; the inside adjustment position of the slack net chain is forced to the outside of the net chain of the turning transition section, and after the inside adapts to the circumference of the outside, the driving head 2f on the inside of the net chain is meshed with the corresponding driving upright rod 1d.

A plurality of rotating drum vertical rods 1b are uniformly arranged along the circumferential direction of the rotating drum 1, and each driving vertical rod 1d is respectively fixed on the outer vertical surface of the corresponding rotating drum vertical rod 1b.

As shown in fig. 8 and 9, in an embodiment of the transition section of the net chain entering the turn, a guide block is fixed at one end of each vertical drum rod 1b, the guide block is located at the bottom of the drum of the ascending spiral or at the top of the drum of the descending spiral, each guide block is respectively provided with a guide arc surface and a guide oblique arc surface which are in smooth transition, the guide arc surface and the drum are coaxial, the radius of the guide arc surface is equal to or smaller than that of the drum, the guide arc surface of the ascending spiral faces downwards, the guide arc surface of the descending spiral faces upwards, each driving vertical rod 1d of the ascending spiral is inserted from the middle part of the width direction of the guide oblique arc surface and extends to the bottom of the guide arc surface, each driving vertical rod 1d of the descending spiral is inserted from the middle part of the width direction of the guide oblique arc surface and extends to the top of the guide arc surface, and the outer edge of each driving vertical rod 1d is tangent to the guide arc surface; the inside adjustment position of the net chain that the net chain outside of turn changeover portion was relaxed is forced, and the net chain inboard slides along the direction cambered surface of guide block until the inboard girth that adapts to the net chain outside of net chain after, and the inboard drive head 2f of net chain just meshes with corresponding drive pole setting 1d.

The entrance end of the rotating drum vertical rod 1b is provided with a guide block, for example, a rising spiral is used, the driving vertical rod 1d extends to the bottom of the guide arc surface, the outer edge of the driving vertical rod is tangent to the guide arc surface, the driving vertical rod is hidden in the guide arc surface, and the driving head 2f can freely slide along the guide arc surface, so that the position of the inner side of a net chain which is forced to relax outside the net chain can be adjusted, the interference of the driving vertical rod is avoided, after the inner side of the net chain completely adapts to the circumference of the outer side, the driving head 2f rises to the position of the guide inclined arc surface along with the net chain and is meshed with the driving vertical rod 1d inserted on the guide inclined arc surface, and the guide inclined arc surface provides a meshing space for the two sides of the driving vertical rod 1d.

As shown in fig. 10 and 11, another embodiment of the turning transition section of the net chain 2 is that an elastic guide block 1g is fixed at one end of each vertical drum rod 1b, the elastic guide block 1g is positioned at the bottom of the drum of the ascending spiral or at the top of the drum of the descending spiral, the elastic guide block 1g is provided with an arc-shaped convex ridge 1g1, the arc-shaped convex ridge 1g1 inclines towards the advancing direction of the net chain 2, the lower end of each driving vertical rod 1d of the ascending spiral is spliced with the arc-shaped convex ridge 1g1, and the upper end of each driving vertical rod 1d of the descending spiral is spliced with the arc-shaped convex ridge 1g 1; the outer edge of each arc-shaped ridge 1g1 is flush with the outer edge of the driving vertical rod 1d, or the outer edge of each arc-shaped ridge 1g1 is higher than the outer edge of the driving vertical rod 1 d; the inner side of the net chain which is loosened at the outer side of the net chain of the turning transition section is forced to adjust the position, the inner side of the net chain slides along the arc-shaped convex ridge 1g1 of the elastic guide block 1g until the inner side of the net chain adapts to the circumference of the outer side of the net chain, and the driving head 2f at the inner side of the net chain is meshed with the corresponding driving vertical rod 1d.

For example, the upper end of each driving upright rod 1d is spliced with the arc-shaped convex ridge 1g1 of the elastic guide block 1 g; the driving head 2f can freely slide along the arc-shaped convex ridge 1g1, so that the position of the inner side of the net chain which is loosened by force on the outer side of the net chain can be adjusted without being interfered by the driving upright rod, and after the inner side of the net chain is completely adapted to the circumference of the outer side, the driving head 2f descends to the upper end of the driving upright rod 1d along with the net chain 2 and enters into engagement.

The back of the elastic guide block 1g is embedded in the vertical caulking groove 1b1 of the corresponding drum vertical rod 1b, the middle part of the vertical caulking groove 1b1 in the width direction is provided with a vertical tenon 1b2, and the vertical tenon 1b2 is embedded in the elastic guide block caulking groove 1g2 on the back of the elastic guide block 1 g; the vertical tenon 1b2 is embedded with a floating spring 1g3, and the other end of the floating spring 1g3 is embedded in a counter bore of the elastic guide block 1g. The two sides of the elastic guide block 1g are matched with the vertical caulking grooves 1b1 of the vertical drum rod 1b, the vertical tenon 1b2 is matched with the elastic guide block caulking groove 1g2, so that the elastic guide block 1g can float in the diameter direction of the drum, the floating spring 1g3 provides outward elastic force for the elastic guide block 1g, the error of the gyration radius of a net chain can be compensated, a certain tension is kept in the transition section of the net chain, particularly, for a double-tower structure, the net chain at the outlet of the drum at the left side can normally unscrew out without a pause phenomenon, the elasticity of the elastic guide block 1g can compensate the error of the unscrewing and screwing in of the net chain between the double towers, the inner side of the net chain can be kept to be attached to the arc-shaped convex ridge 1g1 of the elastic guide block 1g, the arc-shaped convex ridge 1g1 is forced to fall back on the vertical drum rod 1b, and the net chain 2 smoothly transits to and is engaged with the driving vertical rod 1d below after continuing to revolve.

As shown in fig. 1 to 7, two drums 1 may be arranged side by side, a left drum guide block 1e is arranged at the lower end of each driving upright 1d of the left drum, and a right drum guide block 1f is arranged at the upper end of each driving upright 1d of the right drum; net chain 2's net chain input section 2a extends right and gets into left section of thick bamboo guide block 1e periphery of left side rotary drum lower part along the tangential, the periphery along left side rotary drum is the heliciform winding and rises, get into net chain changeover portion 2b along the tangential from the upper portion of left side rotary drum right, net chain changeover portion 2b gets into right section of thick bamboo guide block 1f periphery on right side rotary drum upper portion along the tangential right, the periphery along right side rotary drum is the heliciform winding and descends, get into net chain output section 2c along the tangential right from the lower part of right side rotary drum, net chain output section 2c gets into net chain return section 2d to a left side after 5 steering wheels of right side, left directive wheel 4 is walked around to the left end of net chain return section 2d and net chain input section 2a links to each other.

The net chain input section 2a enters a guide arc surface of a left cylinder guide block 1e along the tangential direction after being led out from a left steering wheel 4, the net chain enters a guide oblique arc surface of the left cylinder guide block 1e after advancing, the net chain is wound upwards after advancing, the net chain enters a guide oblique arc surface 2b of a left cylinder guide block 1e, each driving upright rod 1d uniformly distributed along the circumference of a left cylinder respectively hooks a driving head 2f of the net chain 2 close to the inner side of the cylinder, the net chain 2 is driven to rise to the top of the left cylinder around a cylinder rotating disc, the net chain enters a net chain transition section 2b along the tangential direction, then the net chain enters a guide arc surface 1f1 of a right cylinder guide block 1f along the tangential direction, the net chain 2 enters a guide oblique arc surface 1f2 of a right cylinder guide block 1f, each driving upright rod 1d uniformly distributed along the circumference of a right cylinder respectively hooks a driving head 2f of the net chain 2 close to the inner side of the cylinder, the net chain 2 is driven to rotate around the cylinder and descend to the bottom of the right cylinder, the cylinder along the tangential direction, the net chain is led out and enters a net chain output section 2c, after being steered rightwards by a right steering wheel 5, the net chain enters a net chain return section 2d and a net chain tensioning section 2e leftwards, and then bypasses a left steering wheel 4 to enter a net chain input section 2a again. This achieves a long-distance continuous cyclic rotation of the network chain 2 in both towers.

The centers of the two rotary drums are respectively supported on a frame 10 through a rotary drum central shaft 1a, rotary drum chain wheels 1c are respectively fixed at the bottoms of the two rotary drums, a main driving chain wheel 7 and a tension chain wheel 8 are arranged between the two rotary drum chain wheels 1c, a driving chain 3 bypasses the main driving chain wheel 7 and the tension chain wheel 8 in an S shape and is in transmission connection with the two rotary drum chain wheels 1c, the main driving chain wheel 7 is installed on an output shaft of a main driving motor speed reducer 6, and the main driving motor speed reducer 6 is fixed on the frame 10 nearby.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention. The undescribed technical features of the present invention can be realized by or using the prior art, and are not described herein again.

Claims (7)

1. The utility model provides a net chain conveyer, includes the rotary drum, and the net chain is the periphery of heliciform winding at the rotary drum, its characterized in that: a plurality of rotating drum vertical rods are uniformly arranged along the circumference of the rotating drum, each driving vertical rod is respectively fixed on the outer vertical surface of the corresponding rotating drum vertical rod, and driving heads meshed with the driving vertical rods are respectively arranged on the inner sides, close to the rotating drum, of chain links of the net chain; the inner edge of the driving head is in a convex arc shape, and arc grooves matched with the driving upright rods are formed in two sides or one side of the driving head; one end of each rotating drum vertical rod is fixed with a guide block, and the guide block is positioned at the bottom of the rotating drum of the ascending screw or at the top of the rotating drum of the descending screw; the net chain enters the arc spiral section from the straight line advancing section through the turning transition section, and the driving head on the inner side of each chain link of the turning transition section abuts against the guide block to slide.

2. The net chain conveyor of claim 1, wherein: each guide block is provided with a guide arc surface and a guide oblique arc surface which are in smooth transition, the guide arc surface and the rotary drum are coaxial, the radius of the guide arc surface is equal to or smaller than that of the rotary drum, the guide arc surface of the ascending spiral faces downwards, the guide arc surface of the descending spiral faces upwards, each driving vertical rod of the ascending spiral is inserted from the middle part of the width direction of the guide oblique arc surface and extends to the bottom of the guide arc surface, each driving vertical rod of the descending spiral is inserted from the middle part of the width direction of the guide oblique arc surface and extends to the top of the guide arc surface, and the outer edge of each driving vertical rod is tangent to the guide arc surface.

3. The net chain conveyor of claim 2, wherein: the inside adjustment position of the net chain that the net chain outside of turn changeover portion was relaxed is forced, and the net chain inboard slides along the direction cambered surface of guide block until the inboard girth that adapts to the net chain outside of net chain after, and the inboard drive head of net chain just meshes with corresponding drive pole setting.

4. The net chain conveyor of claim 1, wherein: the guide block is an elastic guide block, the elastic guide block is provided with arc-shaped convex ridges which incline to the advancing direction of the net chain, the lower ends of the driving vertical rods of the ascending screw are spliced with the arc-shaped convex ridges, and the upper ends of the driving vertical rods of the descending screw are spliced with the arc-shaped convex ridges; the outer edge of each arc-shaped convex ridge is flush with the outer edge of the driving vertical rod, or the outer edge of each arc-shaped convex ridge is higher than the outer edge of the driving vertical rod.

5. The net chain conveyor of claim 4, wherein: the back surface of the elastic guide block is embedded in a vertical embedding groove of a corresponding drum vertical rod, a vertical tenon is arranged in the middle of the vertical embedding groove in the width direction, and the vertical tenon is embedded in an elastic guide block embedding groove in the back surface of the elastic guide block; a floating spring is embedded in the vertical tenon, and the other end of the floating spring is embedded in a counter bore of the elastic guide block.

6. The net chain conveyor of claim 4, wherein: the inside adjustment position of the net chain that the net chain outside of turn changeover portion was relaxed is forced, and the net chain inboard slides along the arc convex ridge of elastic guide piece until the inboard girth that adapts to the net chain outside of net chain, and the inboard drive head of net chain just meshes with corresponding drive pole setting.

7. The net chain conveyor according to any one of claims 1 to 6, wherein: the rotary drum is equipped with two side by side, and the ascending spiral that gets into the left side rotary drum behind the changeover portion that turns right of net chain input section gets into the net chain changeover portion right along the tangential from the upper portion of left side rotary drum, the descending spiral that gets into the right side rotary drum behind the changeover portion that turns right of net chain changeover portion gets into the net chain output section right along the tangential from the lower part of right side rotary drum, net chain output section gets into net chain return section to the left after right directive wheel, the left end of net chain return section is walked around left directive wheel with the net chain input section links to each other.

Images