KR19990068070A - Primary sorting apparatus for flat articles - Google Patents

Abstract

A secondary sorting apparatus that performs fine sorting operations, and provides a primary sorting apparatus for a flat-shaped article having a simple structure that can perform temporary sorting without changing the direction of the article at the time of carrying in.

Arranged above the horizontal traveling portion H on the conveying mechanism 25 supported by the first conveying chain 11 and the second conveying chain 16 which are circulated in an endless state in a vertical plane with the front side obliquely downward. When the article is put in from the inputted portion and moved to a designated discharged portion among the discharged portions 44A, 44B, 44C, 44D arranged along the vertical traveling portion V, the latch lever corresponding to the discharged portion is operated. The mechanism 45 actuates the latch lever provided in the conveyance mechanism, opens the cover body provided in the opening part of the conveyance mechanism front surface, and discharges an article to own weight. The open lid is closed again by the lid closing guide 50 provided below the discharge portion 44D.

Description

Primary sorting apparatus for flat articles}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a primary sorting apparatus for temporarily classifying and handing a flat sorting article such as an envelope or a book into a secondary sorting apparatus for finely classifying.

As a sorting apparatus used when classifying flat items such as envelopes by destination, for example, a structure described in Japanese Patent Laid-Open No. 9-301532 is known.

In the apparatus described in the above publication, a lifting conveyor A5 is placed between the article feeding conveyors A1 and A2 and the sorting-out conveyor A3 and A4 arranged in various stages as shown in FIG. The article W carried in from the article input conveyors A1 and A2 to the lifting conveyor A5 is divided into a plurality of sorting export conveyors A3 and A4, and is further divided into these carrying conveyors A3 and A4. It is comprised so that it may classify into secondary fine detail every where it classifies as a reclassification conveyor which is not shown in figure which is installed successively underneath.

The lifting conveyor A5 has a plurality of buckets A6 circulating in a vertical plane, and the bucket opening cover A7 is provided in these buckets A6, and the bucket opening cover A7 is a lifting conveyor (A7). It is held in the open position on the rising side of A5) to receive the article W from the article input conveyors A1 and A2.

The bucket opening cover A7 is closed when it rotates from the rising side to the falling side, the fall of the article W from the inside of the bucket A6 is prevented, and the sorting-out conveying conveyor A3, A4 to which the said bucket A6 was designated is carried out. When descending to the chute (A8, A9) corresponding to a certain position, the opening cover (A7) is opened here, the article (A3) through the chute (A8) or chute (A9) with one of the conveying conveyor (A3, A4) It is configured to export W).

In the classification apparatus described in Japanese Patent Application Laid-open No. Hei 9-301532, since the article feeding conveyor and the lifting conveyor are separate objects, the article is arranged so that the timing of loading the goods from the article feeding conveyor to the bucket of the lifting conveyor is adjusted. It is necessary to control the feeding conveyor, the structure is complicated, and when the bucket of the lifting conveyor rotates from the rising side to the falling side, the direction of the article is reversed, so that the direction of the article on the article feeding conveyor and the direction on the sorting conveyor are different. There was a problem of changing in the reverse direction with respect to the conveying direction.

Therefore, the present invention solves the problems of the prior art as described above, and has a simple flat structure that can be temporarily sorted and passed without changing the direction of the goods at the time of import into a secondary sorting device that performs a fine sorting operation. An object is to provide a primary sorting apparatus for articles.

1 is a side view of a flat article sorting device in which the primary sorting device of the present invention is used;

Figure 2 is a side view showing the internal structure of the primary sorting device of the present invention,

Figure 3 is a front view showing the internal structure of the primary sorting device of the present invention,

Figure 4 is a rear view showing the internal structure of the primary sorting device of the present invention,

5 is a cross-sectional view seen from the arrow direction at the position A-A in FIG. 2;

6 is a side view seen from the side of the first transport body of the transport mechanism for moving the upper horizontal traveling portion;

Fig. 7 is a side view seen from the side of the first carrier of the transport mechanism for moving the vertical running portion,

8 is a front view of a conveyance mechanism for moving the vertical traveling portion,

Fig. 9 is a side view seen from the side of the second carrier of the transport mechanism for moving the vertical running portion;

10 is a side view of the latch lever operating mechanism;

11 is a front view of the latch lever operating mechanism;

12 is a side view of the lid closing guide,

13 is a front view of the cover closing guide,

14 is a side view showing a part of the conventional sorting apparatus.

<Description of the symbols for the main parts of the drawings>

1: Flat type goods sorting device 2: Primary sorting device

3: secondary sorting device 4: relay conveyor

4A, 4B, 4C, 4D: Relay conveyor 5A, 5B, 5C: Input section

6: frame 7, 8, 9, 10, 12, 13, 14, 15: sprocket

11: first carrier chain 16: second carrier chain

17,18: driven sprocket 19,20: electric chain

21: intermediate shaft 22, 23: intermediate sprocket

24: geared motor 25: conveying mechanism

26: conveying mechanism holding frame 26A: vertical part

26B: Inside part 27: Carrying mechanism main body

27A: Cover body 28A, 28B, 30A, 30B: Guide roller

29, 31: Horizontal guide rail 32A, 32B: Rotating shaft

33A, 33B: conveying mechanism push guide 34A, 34B: conveying mechanism push roller

35: opening and closing support shaft 36: lock arm

36A: engaging pin 37: support shaft

38: latch lever 39: cover closing lever

39A: cover closing roller 40: buffer stopper

41: cam plate 54: compression spring

55: rotary encoder

For this purpose, the primary sorting apparatus of the flat article of the present invention comprises a first conveying chain which is circulated in an endless state in a vertical plane along a traveling route having a horizontal traveling portion and a vertical traveling portion, A second carrier chain which is circulated in an endless state in synchronism with the first carrier chain along a traveling route in which the traveling route of the first conveying chain is moved up and down a predetermined distance in a vertical plane spaced toward the traveling route, and one side The upper side and the front side are rotated freely by the side of the first chain, and the other side is rotatably supported by the second chain, and circulated and driven by maintaining the posture with the chains inclined downward. A plurality of conveying mechanisms having openings in the openings and openings in the openings in front of the respective conveying mechanisms are freely provided, and are always applied by springs in the direction of opening the openings. A displacement is freely installed between the cover body and each conveyance mechanism between the latched position and the open position. When the cover is closed, it moves to the latched position by the spring pressing force, engages with the closing position, and resists the spring pressing force. And a latch lever for releasing the engagement of the lid when it is moved to the open position, a lid closing lever for driving in succession to the opening and closing operation of the lid, and an upper portion of the horizontal running portion of the conveying mechanism. A plurality of inlet portions to be introduced, a plurality of discharge portions disposed along a vertical running portion of the conveying mechanism, and a plurality of discharge portions corresponding to each of the discharge portions, and selectively actuating the latch lever of the conveying mechanism to selectively discharge the goods in the conveying mechanism. The latch lever actuating mechanism for discharging to the inner portion and the discharging portion located at the lowermost portion in the conveying direction of the conveying mechanism are provided further below. For example, a cover closing guide for closing the cover body in contact with the cover closing lever of the transport mechanism with the cover body open is provided.

In the above primary sorting apparatus, each conveying mechanism is circumferentially driven while one side is freely pivotally supported by the first chain and the other side is freely pivotally supported by the second chain. The conveying mechanism holding frame and the conveying device holding frame are tilted downward at a gentle angle when passing through the lower portion of the feeding section, and tilted downward at an urgent angle when passing through the discharge section. It is composed of a conveying mechanism main body having an opening on the top and front of the shaft support, the latch lever and the cover closing lever is installed in the conveying mechanism main body, the lid is freely opened and closed in the opening of the front of the conveying mechanism main body. It is preferable.

When the conveyance mechanism which accommodates the article put in the input part moves a vertical run part from a horizontal run part, and reaches the designated discharge part, the latch lever operating mechanism provided corresponding to the said discharge part will operate the latch lever of a conveyance mechanism.

When the latch lever is operated, the cover body is released, the cover body is opened by the spring force, and the article is discharged from the conveying mechanism in which the front end side is inclined downward to the discharge portion designated by the weight. Discharged.

In addition, the conveying mechanism is composed of a conveying mechanism holding frame and the conveying mechanism main body, and when the conveying mechanism passes through the lower portion of the feeding section, the leading end side of the conveying mechanism main body is inclined downward at a gentle angle and passes through the discharge portion. In the case where the swing mechanism is freely supported on the transport mechanism holding frame so that the transport mechanism body is tilted downward at an urgent angle at the time, the impact applied to the goods when the goods are introduced into the transport mechanism is reduced, and the Discharge operation is performed reliably and smoothly.

(Example)

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a side view of a flat article sorting apparatus in which a primary sorting apparatus according to an embodiment of the present invention is used, wherein the flat article sorting apparatus 1 classifies and sorts flat articles such as bags and books. Primary sorting apparatus 2 for sorting, secondary sorting apparatus 3 for classifying the sorted goods in this primary sorting apparatus 2 more finely, and secondary sorting apparatus from the primary sorting apparatus 2 It consists of the relay conveyor apparatus 4 for relaying and conveying an article in (3).

The article to classify can be carried in from the input parts 5A, 5B, and 5C provided in three places in the upper part of the primary sorting apparatus 2. As shown in FIG.

The article carried in to the primary sorting apparatus 2 is classified into any of the relay conveyors 4A, 4B, 4C, and 4D provided with four stages up and down inside the relay conveyor apparatus 4.

On the other hand, the secondary sorting device (3) has a plurality of column divisions (3A, 3B, 3C, 3D) of the upper and lower four stages, and the goods sent to each stage of the relay conveyor (4A, 4B, 4C, 4D) Are finely classified into designated locations of the classification compartments 3A, 3B, 3C, and 3D of the stages corresponding to these stages.

Figure 2 is a side view showing the internal structure of the primary sorting device 2, Figure 3 is a front view showing the internal structure seen from the right of Figure 2, Figure 4 is a rear view showing the internal structure seen from the left of Figure 2, Fig. 5 is a cross-sectional view seen in the direction of the arrow in the position AA in Fig. 2, wherein the primary sorting device 2 has a machine frame 6 having a substantially L-shaped side shape, and the sprocket 7, The first conveying chain 11 circulates forward through the front of the drawing through the steps 8, 9, and 10, and through the sprockets 12, 13, 14, 15. The 2nd conveying chain 16 which circulates inward is provided.

The first conveying chain 11 and the second conveying chain 16 each have a pair of sprockets 7, 8, 9, 10 and a sprocket so as to move traveling paths of the same shape parallel to each other by a predetermined distance in the vertical direction. The pair of 12, 13, 14, and 15 is supported by the machine frame 6 so as to rotate about the predetermined distance in the vertical direction about the horizontal axis with the height difference.

Among these sprockets, the sprocket 9 and the sprocket 14 are each fixed with the driven sprockets 17 and 18 integrally, and these driven sprockets 17 and 18, the transmission chains 19 and 20, and the intermediate part, respectively. Through the intermediate sprockets 22, 23 integrally connected to the shaft 21, synchronously driven as the geared motor 24 driven to the intermediate shaft 21, the first conveying chain 11 and the second conveying chain ( 16) is circularly driven at the same speed in the same direction.

In the 1st conveyance chain 11 and the 2nd conveyance chain 16, many conveyance mechanisms 25 of the flat bucket type which receive and convey an article are provided in regular intervals.

These conveyance mechanisms 25 are comprised from the conveyance mechanism holding frame 26 and the conveyance mechanism main body 27, The conveyance mechanism holding frame 26 has the conveyance mechanism main body 27 between them, and is longitudinal of FIG. The portion 26A is formed in an I-shape that is vertically long as shown in FIGS. 6 and 7, and the inner portion 26B is formed in an L-shape as shown in FIG. 9, both of which are the conveyance mechanism main body 27. It is connected integrally at 26 C of lower connection parts.

As shown in FIG. 6, the guide rollers 28A and 28B are rotatably provided around the horizontal axis in the upper and lower ends of the vertical part 26A of the conveyance mechanism holding frame 26, among which the guide roller 28A is provided. When the conveyance mechanism 25 moves the horizontal running part H, it is guide | induced to the horizontal guide rail 29 attached to the apparatus frame 6 side in FIG.

On the other hand, as shown in Fig. 9, the conveying mechanism main body 27 is provided with guide rollers 30A and 30B freely rotating around the horizontal axis at both ends of the inner portion 26B of the conveying mechanism holding frame 26, respectively. The guide rollers 30A and 30B are attached to the horizontal guide rails 31 attached to the inside of the machine frame 6 shown in FIG. 5 when the transport mechanism 25 moves the horizontal running portion H. As shown in FIG. To be guided.

In addition, the conveyance mechanism holding frame 26 is the 1st conveyance chain 11 and the 2nd conveyance chain 16 by the front-end | tip part of each axis | shaft to which 28 A of guide rollers and 30 A of guide rollers are attached. The rotation is freely supported by the shaft.

As shown in FIG. 8, the conveyance mechanism main body 27 is supported by the conveyance mechanism holding frame 26 by a pair of left and right oscillation shafts 32A, 32B so that rocking may be carried out freely, and these rocking shafts 32A, 32B The inclination is pressed against the conveyance mechanism holding frame 26 in the abrupt direction by the spring S wound and attached to the periphery.

5 and 8, both sides of the front end of the conveyance mechanism main body 27 in the conveying direction have almost the same level as the upper portion of the horizontal guide rail 31 on both the left and right sides of the machine frame 6. The conveying mechanism pressing rollers 34A, 34B guided by the pairing conveying mechanism pressing guides 33A, 33B, respectively, are freely rotated.

These conveying mechanism pressing rollers 34A and 34B are raised to the conveying mechanism pressing guides 33A and 33B when the conveying mechanism 25 moves the upper horizontal traveling portion H in FIG. 2, and are conveyed at the position shown in FIG. 6. The mechanism main body 27 rotates around the swing shafts 32A and 32B in response to the pressing force of the torsion spring S. FIG.

At this time, since the reaction force from the conveying mechanism pressing guides 33A and 33B acts upward on the conveying mechanism 25, as shown in FIG. 5, the upper portions of the horizontal guide rails 29 and 31 each have a cross-section. It is formed in a shape and restricts the displacement of the guide rollers 28A, 30A, 30B upwards to prevent the conveyance mechanism 25 from rising.

The conveying mechanism 25 moves to the ends of the conveying mechanism pressing guides 33A and 33B, so that the conveying mechanism pressing rollers 34A and 34B move out of the conveying mechanism pressing guides 33A and 33B to the vertical running portion V. When it moves, the conveyance mechanism main body 27 swings to the position which a bottom surface contacts with the inclined upper surface of the connection part 26C of the conveyance mechanism holding frame 26 by the elastic force of the torsion spring S, as shown in FIG. Thus, the inclination of the conveyance mechanism main body 27 becomes large.

Moreover, the rubber buffer plate L is attached to the upper surface of the connection part 26C, and the collision with the bottom surface of the conveyance mechanism main body 27 is buffered.

Next, the conveying mechanism main body 27 will be described in detail. The conveying mechanism main body 27 is formed in the shape of a flat bucket, the upper side and the front side of which are opened, and the lid 27A has an opening and closing support shaft ( 35), the opening and closing is freely attached, and a force is normally applied in the opening direction by the torsion spring S 'shown in FIG. In addition, the above-mentioned conveying mechanism push rollers 34A and 34B are rotatably attached to both ends of the opening and closing support shaft 35.

The lock arm 36 is attached to one side of the cover body 27A so as to rotate together with the cover body 27A around the opening / closing support shaft 35, and the locking pin 36 is attached to the front end of the lock arm 36. 36A) protrudes outward.

On the other hand, as shown in Figs. 6 and 7, the latch lever 38 is attached to the conveying mechanism main body 27 so as to swing freely around the support shaft 37, and the lid 27A is provided at the side edge thereof. An engaging groove (not shown) is formed in which the locking pin 36A is caught and fixed in the closed position.

The latch lever 38 is always urged in a direction to engage with the locking pin 36A by a torsion spring (not shown) wound around the support shaft 37.

8 and 9, the lid closing lever 39 is disposed on the side opposite to the side on which the lock arm 36 of the lid 27A is provided.

The lid closing lever 39 is provided to rotate together with the lid 27A around the opening and closing support shaft 35, and the lid closing roller 39A is rotatably attached to the front end thereof. .

Near the front center of the lower surface center of the conveyance mechanism main body 27, the buffer stopper 40 which has an oil damper which absorbs and absorbs when 27 A of cover bodies open by the spring force of the torsion spring is attached.

In the present embodiment, the conveying mechanism main body 27 is a dual structure of the outer portion which is connected to the conveying mechanism holding frame 26 by the swing shafts 32A and 32B and the inner portion where the article is accommodated, and the outer portion. The inner and inner portions are integrally connected via a rubber buffer member to reduce noise generated by the input of the article and noise generated by vibration of the article in the conveying mechanism main body 27 during conveyance. Doing.

Corresponding to the input portions 5A, 5B, and 5C shown in FIG. 1, the article inlets 41A, 41B, 41C are formed on the upper surface of the apparatus frame 6 as shown in FIG. 2. These article inlets 41A, 41B and 41C are provided with a chute which is inclined downwardly forward and freely opened and closed at its front end, and when the conveyance mechanism 25 has moved to the front end of the chute, the gate Is opened so that the article is introduced into the conveying mechanism 25, and the conveying mechanism 25 is inclined substantially parallel to the chute by the conveying mechanism pressing guides 33A and 33B as described above. Has a small angle, and the lid 27A is in a closed state.

When the conveyance mechanism 25 moves forward and moves to the vertical running portion V, as shown in FIG. 7, the conveyance mechanism 25 includes the conveyance mechanism push rollers 34A and 34B as the conveyance mechanism press guides 33A and 33B. Since it is not supported, the inclination increases, and as shown in Fig. 8, the guide rollers 28A, 28B and the inner part 26B provided above and below the vertical part 26A of the conveyance mechanism holding frame 26 are shown. Guide rollers 30A are guided to a pair of vertical guide rails 42 and 43 respectively installed in the machine frame 6.

As shown in FIG. 2, the discharge part 44A which discharges the goods conveyed by the conveyance mechanism 25 to four places of the apparatus frame 6 with respect to the vertical running part V of the conveyance mechanism 25 fall side. , 44B, 44C, 44D are provided, and the latch lever operating mechanism 45 is attached to four places along the front face of the machine frame 6 so as to correspond to the respective discharge portions 44A, 44B, 44C, 44D. .

As shown in Figs. 3, 10, and 11, these latch lever operating mechanisms 45 retreat to avoid the interference between the latch lever 38 and the position protruding to the position where the front end of the latch lever 38 passes. It consists of the release arm 47 which rotationally supports around the support shaft 46 between positions, and the air cylinder 48 which rotates this release arm 47. As shown in FIG.

At the front end of the release arm 47, a contact roller 49 for rotating the contact with the latch lever 38 is provided freely, and the lower arm moves by rotating the release arm 47 to the protruding position. The lock arm 36 is contacted with the contact roller 49 at the bottom surface of the latch lever 38 of the conveying mechanism and pushed to the open position to engage the engaging groove C formed in the latch lever 38. The cover body 27A is opened by deviating from the engaging pin 36A.

At this time, as shown in FIG. 7, since the conveyance mechanism 25 is inclined at an urgent angle downward, the article accommodated in the conveyance mechanism main body 27 is discharged reliably and smoothly by its own weight. It is discharged to any one of the sections 44A, 44B, 44C, and 44D.

The discharge parts 44A, 44B, 44C, and 44D correspond to the relay conveyors 4A, 4B, 4C, and 4D provided in four stages in the relay conveyor apparatus 4 shown in FIG. 1, respectively. It is conveyed to the secondary sorting apparatus 3 via any one of these relay conveyors 4A, 4B, 4C, and 4D.

On the other hand, as shown in FIG. 2, below the discharge part 44D, the cover closing guide 50 for closing the cover body 27A opened by the latch lever operating mechanism 45 is provided.

As shown in FIGS. 12 and 13, the cover closing guide 50 is cam plate 53 around the support shaft 52 which is mounted on the mounting plate 51 that is bolted to the machine frame 6. The head of the bolt 52 which slides freely through the hole (not shown) formed in the spring receiving piece 51A which is set up from the attachment plate 51 and is freely installed in the swing end is freely installed at the swing end side. It is fixed by.

A compression spring 54 is attached to the bolt 52 to hold the cam plate 53 at the position shown in Fig. 12, and the transport mechanism 25 is closed by the lid mechanism 27A. When it moves downward to the position of the guide 50, the lid closing roller 39A of the front end of the lid closing lever 39 contacts the cam plate 53, and rotates upwards, and accordingly the lid 27A Is closed, and the engaging pin 36A of the lock arm 36 and the engaging groove of the latch lever 38 are engaged to keep the lid 27A in the closed position.

At this time, since the lid closing roller 27A compresses the compression spring 54 at the time of contact with the cam plate 53 and oscillates the cam plate 53 slightly, the shock during both contact is buffered and at the same time. When the lid 27A is closed, an excessive force is prevented from being applied to the lid closure roller 39A or the cam plate 53.

In addition, as shown in FIG. 2, the travel position of each conveyance mechanism 25 is detected by the rotary encoder 55 which drives following the rotation of the sprocket 10, and operation | movement of the latch lever operating mechanism 45 is carried out. The timing is controlled.

The presence or absence of the article in the conveyance mechanism 25 is detected by a non-contact sensor disposed below each of the article inlets 41A, 41B, and 41C, and the presence of the gate of each article inlet 41A, 41B, 41C is determined. When opening and closing is controlled and articles have already been put into the transfer mechanism 25, the gates are not opened so that a plurality of articles are not put into one transfer mechanism 25.

In the above-mentioned embodiment, the conveyance mechanism 25 is comprised by the conveyance mechanism holding frame 26 and the conveyance mechanism main body 27, and the conveyance mechanism main body 27 is freely rocked with respect to the conveyance mechanism holding frame 26. As shown in FIG. Although the shaft is supported, the structure may be simplified by integrating the conveyance mechanism holding frame and the conveyance mechanism main body.

In this embodiment, the latch lever 38 is engaged with the locking pin 36A of the lock arm 36 which is integrally connected with the lid 27A. However, the lid is directly caught by the latch lever or peeled off. It may be a structure that can be raised.

In addition, in this embodiment, although the input part of article | item is three places and the discharge part is four places, these numbers can be increased or decreased as needed.

In the present embodiment, the article is introduced into the conveying mechanism from the horizontal traveling portion above the conveying mechanism, but may be fed from the lower horizontal traveling portion, or the dispensing portions are provided in two upper and lower horizontal traveling portions. good.

In addition, it is good also as a structure which discharges an article to a discharge part, when a conveyance mechanism raises a vertical run part, In this case, a latch lever and a latch lever operating mechanism are comprised so that a cover body may be opened by the upward movement of a conveyance mechanism, Similarly, the lid closing lever or the lid closing guide may be configured so that the lid is closed by the upward movement of the transport mechanism.

As described above, in the primary sorting apparatus of the flat article of the present invention, since the part to which the article to classify is sorted and the part to classify are integrated into one, the installation space is minimized and mechanical and control are carried out. It also simplifies manufacturing costs.

In addition, since the conveyance mechanism is always supported in the same posture by the first chain and the second chain, the conveyance mechanism can keep the article direction at the time of feeding and the article direction after sorting in the same direction.

Then, the conveying mechanism is composed of the conveying mechanism holding frame and the conveying mechanism main body, and when the conveying mechanism passes through the lower portion of the feeding section, the leading end side of the conveying mechanism main body is inclined downward at a gentle angle and passes through the discharge section. When the swing mechanism is freely supported on the transport mechanism holding frame so that the transport mechanism body is tilted downward at an urgent angle at the time, the impact applied to the goods at the time of loading the goods into the transport mechanism is reduced, thereby preventing damage to the goods. At the same time, the discharging operation of the article from the conveying mechanism can be reliably and smoothly performed.

Claims (2)

A first conveying chain which is circulated in an endless state in a vertical plane along a traveling route having a horizontal running portion and a vertical running portion, In the vertical plane spaced apart from the travel path side of the first transport chain, the first circulation chain is driven in an endless state in synchronism with the first transport chain along the travel path that moves the travel path of the first transport chain in a vertical distance in parallel with the first transport chain. 2 carrier chain, The upper side of which one side is pivotally supported by the first chain freely, and the other side is freely pivotally supported by the second chain, which is circulated and driven by maintaining the posture with the chains inclined downward. A plurality of transport mechanisms having openings formed in the front surface thereof, A cover body which is freely opened and closed at an opening in the front of each conveying mechanism, and is always pressurized in a direction of opening the opening; Displacement is freely installed between the locking position and the open position in each of the conveying mechanisms. When the lid is closed, the displacement moves to the latched position by the spring pressing force and is locked at the closing position of the lid. A latch lever for releasing the engagement of the cover when it is moved, A lid closing lever driven in succession to the opening and closing operation of the lid, An inlet portion disposed above the horizontal running portion of the conveying mechanism for injecting goods into the conveying mechanism; A plurality of discharge portions disposed along a vertical running portion of the conveying mechanism, A latch lever operating mechanism provided in plurality in correspondence with each discharge portion and selectively operating the latch lever of the transfer mechanism to discharge the goods in the transfer mechanism to a designated discharge portion; It is provided in the lower part of the discharge part which is located in the lowermost part of the conveyance direction of a conveyance mechanism, and is provided with the cover closing guide which closes the said cover body in contact with the cover body closing lever of the conveyance mechanism which is open. Primary sorting apparatus for articles. 2. The conveyance mechanism of claim 1, wherein each of the conveying mechanisms is freely pivotally supported on the first conveying chain on one side and freely pivoted on the second conveying chain on the other side to maintain a predetermined posture. Conveying mechanism holding frame, When passing through the lower part of the feeding part, the leading end side of the conveying direction is inclined downward at a gentle angle, and when passing through the discharge part, the upper and front sides of which the shaft is freely axially supported by the conveying mechanism holding frame are tilted downward at an urgent angle. Consists of a conveying mechanism body having an opening, The latch lever and the cover body closing lever are installed on the conveyance mechanism main body, and the cover body is freely opened and closed at an opening in the front surface of the conveyance mechanism main body.