JP2946300B2 - Mail introduction mechanism of mail sorting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mail sorting apparatus for automatically sorting a large number of different mails for each delivery area.

[0002]

2. Description of the Related Art Conventionally, a mail sorting apparatus for automatically sorting a large number of different mails for each delivery area is disclosed in Japanese Unexamined Patent Publication No.
An automatic mail sorting machine disclosed in Japanese Patent Application Laid-Open No. 2-266186 is known.

A conventional mail sorting apparatus such as an automatic mail sorting machine disclosed in the above publication generally includes a mail introduction system for introducing mail and a mail supplied from the mail introduction system. A mail sorting system for transporting to the target sorting box is provided. In the mail introduction system, the postal code of the mail is input (read), and the mail is prepared for the mail sorting system based on the postal code. Conveyed to the sorting box.

[0004]

However, the conventional mail sorting apparatus is configured as a single integrated dedicated device including a mail introduction system and a mail sorting system. In the case of manual delivery of mail to the system, the quantity of mail that can be processed per unit time is limited, and as a result, there is a problem of lack of flexibility and versatility for different places of use and user requirements. there were.

The present invention has solved the problems existing in the prior art, and can increase the number of mail pieces that can be processed per unit time as necessary, and thereby can be used for different purposes. It is an object of the present invention to provide a mail introduction mechanism of a mail sorting apparatus capable of dramatically improving flexibility and versatility with respect to places and user requests.

[0006]

The mail introduction mechanism 1 according to the present invention includes a mail sorting system Sd having a plurality of sorting boxes B for sorting mails M. Is applied to the mail sorting apparatus D that supplies

[0007] Then, the mail introduction mechanism 1 according to the present invention.
Are, in particular, transport conveyors 4xa... For supplying postal matter M to the first mail sorting system Sdx, and this transport conveyor 4xa.
Are arranged above, and the supplied mail M is made to stand by, and the conveyed conveyor 4xa where the held mail M is emptied is arranged.
A first supply conveyor section 4xu having a standby conveyor 4xs to be put on the upper side, and a mail M arranged in parallel to the first supply conveyor section 4xu and arranged in the second mail sorting system Sdy.
... and the mails M arranged above the conveyors 4ya are made to stand by, and the mails M ... put on standby are put on the empty conveyors 4ya. A second supply conveyor unit 4yu having a standby conveyor 4ys, and each supply conveyor unit 4xu and 4
A distribution conveyor that distributes the supplied postal matter M to each of the supply conveyor units 4xu or 4yu by arranging it between the yu and above both the supply conveyor units 4xu and 4yu and rotating and moving in the forward or reverse direction. , A plurality of introduction units 5a, 5b, 5c,... Having a section 7 and an introduction mechanism section 3 arranged above the distribution conveyor section 7 and introducing postal matter M. Each introduction unit 5
a, 5b, 5c... first supply conveyor section 4xu.
And the second supply conveyor units 4yu... Can be connected to each other.

This makes it possible to configure the entire mail introduction mechanism 1 by arbitrarily connecting the supply conveyors 4xu to each other and 4yu to each other in each of the introduction units 5a. The number of mails M ... which can be increased to the quantity and can be processed per unit time,
It can be increased arbitrarily as needed.

[0009]

Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

First, a configuration of a mail sorting apparatus D provided with a mail introduction mechanism 1 according to the present embodiment will be described with reference to FIGS.

As shown in FIGS. 2 and 3, the mail sorting apparatus D is roughly divided into a mail introduction system S for introducing mails M.
i and mail M supplied from this mail introduction system Si ...
Sorting system S that transports the mail to the target sorting box B ...
d, and the mail sorting system Sd further includes a first mail sorting system Sdx and a second mail sorting system Sdy.

Further, the mail introduction system Si includes the mail introduction mechanism 1 according to the present embodiment, and the mail introduction mechanism 1 includes a plurality of (three in the embodiment) introduction units 5a, 5
b, 5c. In this case, one introduction unit 5a
Is a basic unit, and the other two introduction units 5b,
5c is an extension unit. As shown in FIG. 1, the introduction unit 5b (same for 5c) as an extension unit includes a unit main body 21 having a first supply conveyor unit 4xu and a second supply conveyor unit 4yu. Thereby, at the time of expansion, as shown in FIG. 2, each first supply conveyor section 4xu.
The first supply conveyor lines 4x are continuously integrated by connecting the first supply conveyor lines 4x to each other, and the second supply conveyor units 4yu are assembled to the unit main bodies 21. Further, the second supply conveyor units 4yu are connected to each other. .. Constitute a continuous and integrated second supply conveyor line 4y by sequentially connecting them.

The leading end of the first supply conveyor line 4x in the transport direction is connected to the transport conveyor 22 provided in the vertical sorting unit 60 in the first mail sorting system Sdx. In this case, the conveyor 22 and the conveyor 2
The transport conveyor 4xd provided in the first supply conveyor line 4x connected to the second feeder 2 constitutes a right-angle transport unit 9. As shown in FIG. 7, the right-angle conveyor 9 arranges the conveyor 22 below the conveyor 4xd via a step, and combines the conveyor 22 in a right-angle direction. On the other hand, the leading end of the second supply conveyor line 4y in the transport direction is the second mail sorting system S.
It is connected to the transport conveyor 23 provided in the vertical direction unit 61 at dy. In this case, the conveyor 23 and the second supply conveyor line 4y are connected in a straight line.

Next, a specific configuration of the introduction unit 5a will be described with reference to FIGS. The basic configuration of the other introduction units 5b and 5c is the introduction unit 5a.
Is the same as

The unit body 21 has a body 25, and the body 25 has an introduction mechanism 3. The introduction mechanism section 3 includes an introduction conveyor section 2. The introduction conveyor section 2 includes a feed conveyor section 26 disposed on the rear side in the transport direction and an input conveyor section 27 disposed on the front side. 26 further includes a first feed conveyor 26a and a second feed conveyor 26b. Further, a shutter mechanism 28 is provided between the feed conveyor 26 and the loading conveyor 27 to block or allow the passage of the mail M by elevating. Note that the inner wall surface 2 of the body 25 located on the side of the first feed conveyor 26a
5a is offset to the conveyor side from the inner wall surface 25b of the machine body 25 located on the side of the second feed conveyor 26b and the charging conveyor section 27. Thereby, mail M
Can be prevented from contacting the inner wall surface 25b.

On the other hand, a table 29 is provided on the machine body 25 located on the right side in the transport direction of the first feed conveyor 26a. The worker H can perform work in front of the table 29. Further, a display 30 is provided on the machine body 25 located on the left side in the transport direction of the first feed conveyor 26a. Numeral 31 denotes a stacker for storing mails M, which is set next to the unit body 21. Reference numeral 32 denotes a lift mechanism for sequentially lifting the mails M stored in the stacker 31.

Further, the introduction mechanism section 3 includes an information input section 6 for inputting information relating to the postal matter M. Information input section 6
Is a bar code reader 3 supported via a support frame 35 above a loading conveyor 27, including a keyboard 33 provided on a table 29 for inputting postal codes and the like.
6. A first sensor 37 attached near the first feed conveyor 26a to detect that the mail M is set, a second sensor 38 to detect the size of the mail M, and a height of the mail M to be detected. The third sensor 39 detects the weight of the mail M based on the torque of the drive motor that drives the second feed conveyor 26b. The fourth sensor 40 detects that the mail M has reached the second feed conveyor 26b. Various sensors such as the fifth sensor 42 are included. In FIG. 5, reference numeral 43 denotes a drive unit including a drive motor and a transmission mechanism for driving the first feed conveyor 26a, and reference numeral 44 denotes a second feed conveyor 2a.
A drive unit including a drive motor and a transmission mechanism for driving 6b,
Reference numeral 45 denotes a drive unit including a drive motor for driving the input conveyor unit 27 and a transmission mechanism.

On the other hand, in front of the feeding conveyor 27 in the transport direction, a sorting conveyor 7 is disposed. Sorting conveyor 7
Is disposed below the input conveyor section 27 via a step. The distribution conveyor unit 7 includes a first conveyor 7x and a second conveyor 7y. In addition, a contact portion 47 is provided on the transport route of the mail M on the side of the second conveyor 7y. For this reason, the second conveyor 7y is arranged offset from the first conveyor 7x. Thus, the first conveyor 7x, the second conveyor 7y, and the contact portion 47 constitute a direction changing unit 8 that changes the direction of the mail M to a substantially right angle direction. In addition, the first conveyor 7
The x and the second conveyor 7y are rotationally moved in a forward or reverse direction by a drive unit 48 including a drive motor and a transmission mechanism.

A first supply conveyor unit 4xu and a second supply conveyor unit 4yu are disposed in front of and behind the distribution conveyor unit 7 in the transport direction. In this case, the first supply conveyor unit 4xu and the second supply conveyor unit 4yu are located below the distribution conveyor unit 7. The first supply conveyor unit 4xu has four independent conveyors 4xu.
a, 4xb, 4xc, and 4xd, and a standby conveyor 4xs is provided above the transport conveyor 4xa at the rearmost end in the transport direction. Note that the standby conveyor 4xs is located below the distribution conveyor unit 7, and the mails M are fed from the distribution conveyor unit 7 onto the standby conveyor 4xs.

The second supply conveyor unit 4yu also has four independent conveyors 4ya, 4yb, 4yc and 4yd.
And the transport conveyor 4y at the rearmost end in the transport direction.
A standby conveyor 4ys is provided above a. The standby conveyor 4ys is located below the distribution conveyor section 7, and the mails M are fed from the distribution conveyor section 7 onto the standby conveyor 4ys.

In this case, since the longitudinal direction of the mails M conveyed by the first supply conveyor 4xu coincides with the conveyance direction, the width of the first supply conveyor 4xu is equal to the width of the second supply conveyor 4yu. Can be smaller than dimensions. In FIG. 6, reference numerals 51, 52, 53, 54, and 55 denote drive units including drive motors and transmission mechanisms for driving the conveyors 4ya, 4yb, 4yc, 4yd, and 4ys, respectively.

Next, a specific configuration of the first mail sorting system Sdx will be described with reference to FIGS. In addition,
The basic configuration is the same as the first mail sorting system Sdx, except that the second mail sorting system Sdy is configured symmetrically with respect to the first mail sorting system Sdx.

As shown in FIGS. 2 and 3, the first mail sorting system Sdx includes a vertical sorting unit 60 and a plurality of horizontal sorting units 90a and 90b sequentially connected to the rear end of the vertical sorting unit 60. , 90c... .. Can be arbitrarily expanded or contracted.

The vertical sectioning unit 60 has a horizontal main conveyor section 72 at the bottom. Main conveyor 72
Are arranged alternately with fixed conveyors 73 and swing-type switching conveyors 74 with the front side ascending and descending with the rear side in the conveyance direction as a fulcrum. Further, at a portion of the vertical sorting unit 60 that is connected to the horizontal sorting unit 90a, horizontal transport conveyors 75 arranged in a total of five stages in the vertical direction are provided. Each of the transport conveyors 75 is mounted in a swinging manner in which the front side moves up and down with the rear side in the transport direction as a pivot point. As a result, it is selectively displaced to a horizontal passing position or a forward falling receiving position. Then, between the second stage conveyor 75 and the foremost switching conveyor 74 in the conveying direction, between the third stage conveyor 75 and the second switching conveyor 74 from the front in the conveying direction, and the same as the fourth stage conveyor 75. Between the third switching conveyor 74, the uppermost conveying conveyor 75 and the last switching conveyor 74 in the conveying direction.
Between them, inclined conveyors 76 arranged at an angle are installed. In this case, the upper end of each inclined conveyor 76 is connected to the corresponding conveyor 75, and the lower end of each inclined conveyor 76 is connected to the corresponding switching conveyor 74.
Position above. Thereby, each switching conveyor 74
When the front side of each of the switching conveyors 74 is displaced to the take-up position of the front elevation, each of the switching conveyors 74 is connected to the lower end of each of the inclined conveyors 76, and the front side of each of the switching conveyors 74 is displaced to the horizontal passing position. Then, each of the switching conveyors 74 is connected to the forward conveyor 73. When the switching conveyors 74 are connected to the transport conveyors 73 in front, there is a gap between the lower end of the inclined conveyors 76 and the main conveyor section 72 through which the mail M passes.

In the drawing, reference numeral 77 denotes a drive unit including a drive motor and a transmission mechanism for driving the transport conveyor 73 and the switching conveyor 74, and reference numeral 78 denotes a switching conveyor 7 driven by a rotating crankshaft.
A lifting mechanism for raising and lowering the front side of 4; 79 is an inclined conveyor 7;
6 and a drive unit including a drive motor and a transmission mechanism for driving the conveyor 75, respectively. Each drive unit 77, 79
Only one set of the lifting mechanism 78 is shown for convenience. In addition,
The inclined conveyor 76 may be configured by combining a plurality of conveyors as needed. In addition, since a dead space having a triangular shape when viewed from the front is generated above the inclined conveyor 76 positioned at the uppermost stage, various peripheral devices 80, a control panel 81, and the like are disposed using the dead space.

On the other hand, the horizontal division units 90a are:
As shown in FIG. 3, there are provided a total of twenty section boxes B of five vertical rows and four horizontal rows. FIG. 8 shows a horizontal dividing unit 90.
The principle configuration at the top of FIG. Although the first to fourth stages are not shown, the configuration is the same as that of the uppermost stage. The top configuration consists of four detachable compartment boxes B ...
Are sequentially arranged in the horizontal direction, and each section box B
, Four transport conveyors 91 are arranged respectively. Each of the conveyors 91 is a vertical sorting unit 6
0 are arranged on the same horizontal plane as the conveyor 75 provided. Each of the conveyors 91 is attached in a swinging manner in which the front side is moved up and down with the rear side in the conveyance direction as a pivot point. Thereby, it is selectively displaced to the passing position indicated by the horizontal solid line or the capturing position indicated by the imaginary line falling forward. Reference numeral 92 denotes a drive unit including a drive motor and a transmission mechanism for driving each of the conveyors 91... 93 denotes an elevating mechanism for elevating the front side of the conveyor 91 by a rotating crankshaft. Only one set of the lifting mechanism 93 is shown for convenience.

Next, the overall operation of the mail sorting apparatus D provided with the mail introduction mechanism 1 according to the present embodiment will be described with reference to FIGS.
This will be described with reference to FIG. The stackers 31 containing the mails M are set next to the introduction units 5a.

First, the worker H takes out the postal matter M from the stacker 31, inputs the postal code with the keyboard 33, and places the postal matter M at a fixed position on the first feed conveyor 26a. In this case, the short side of the mail M is brought into contact with the inner wall surface 25a. The postal code may be automatically read by a numeral reading device.

Mail M on the first feed conveyor 26a
Is detected by the first sensor 37, and the first feed conveyor 26a and the second feed conveyor 26b rotate. Thereby, the postal matter M is in the first feed conveyor 2
6a to the second feed conveyor 26b. The postal matter M conveyed to the second feed conveyer 26b is locked by the shutter mechanism 28 and is interrupted, and
The arrival is detected by the fourth sensor 40, and the rotational movement of the first feed conveyor 26a and the second feed conveyor 26b is stopped. Then, the size of the postal matter M is detected by the second sensor 38, and in the case of a large postal matter, the fact is notified by a lamp, a buzzer or the like. In addition, the third sensor 3
The height of the postal matter M is detected by 9 and the weight of the postal matter M is detected by the fifth sensor 42. If the weight of the postal matter M exceeds a specified value, it is notified by a lamp or a buzzer. Thereby, in any case, the worker H can remove the mail M.

On the other hand, if the postal matter M satisfies the regulation, the shutter mechanism 28 descends to allow the transport of the postal matter M. Therefore, when the operator H places the next mail M on the first feed conveyor 26a, the first feed conveyor 26a and the second feed conveyor 26b rotate and move, so that the mail M on the second feed conveyor 26b is moved. Is transported to the charging conveyor 27. The input conveyor section 27 is constantly rotating and moving, and the second feed conveyor 2
The postal matter M conveyed from 6b is conveyed to the sorting conveyer unit 7 via the charging conveyer unit 27. In this case, by setting the relative height of the input conveyor 27 and the sorting conveyor 7 and the setting of the moving speed of the input conveyor 27, the mail M can be input to a fixed position on the first conveyor 7x. The barcode of the postal matter M (registered postal matter) is read by the barcode reader 36 when being conveyed by the input conveyor 27.

When the postal matter M is conveyed to the distribution conveyor section 7, it is detected by a sensor (not shown), and based on the postal code input from the keyboard 33, the distribution conveyor section 7 (first conveyor 7x and The second conveyor 7y) rotates in the forward or reverse direction, and the mails M are sorted to the first supply conveyor unit 4xu or the second supply conveyor unit 4yu.

That is, the mail M is transferred to the first mail sorting system Sdx.
, The sorting conveyor unit 7 rotates in the forward direction, and the postal matter M on the first conveyor 7x is directly input to the standby conveyor 4xs of the first supply conveyor unit 4xu. On the other hand, when the postal matter M is supplied to the second postal matter sorting system Sdy, the sorting conveyor section 7 rotates and moves in the opposite direction, and the postal matter M on the first conveyor 7x passes through the direction changing section 8. Standby conveyor 4ys of the second supply conveyor unit 4yu
It is thrown on. In the direction changing unit 8, one end of the postal matter M comes into contact with the contacting part 47 to prevent its conveyance, and the other end of the postal matter M is conveyed by the second conveyor 7y. The direction of the postal matter M is changed to a substantially right angle direction as it is conveyed.

The distribution conveyor section 7 and the standby conveyor 4
By setting the relative heights of xs and 4ys and the moving speed of the sorting conveyor unit 7, the mail M is transferred to the standby conveyors 4xs and 4y.
It can be put in the fixed position on s.

On the other hand, the postal matter M on the standby conveyors 4xs, 4ys is thrown into the transport conveyors 4xb, 4yb by the rotational movement of the standby conveyors 4xs, 4ys.
Normally, the work is performed simultaneously by the plurality of introduction units 5a..., The mail M conveyed from the other introduction units is the first supply conveyor line 4x including the conveyance conveyor 4xa and the second mail including the conveyance conveyor 4ya. It is conveyed through the supply conveyor line 4y. Therefore, the postal matter M on the standby conveyors 4xs, 4ys is conveyed while the conveyors 4xb, 4yb are empty. Also, each of the conveyors 4xa..., 4ya. That is, the operation of stopping once after the conveyor belt in each of the conveyors 4xa,..., 4ya.

Then, the mails M are sent to the first mail sorting system Sdx via the first supply conveyor line 4x, and to the second mail sorting system Sdx via the second supply conveyor line 4y.
dy. In this case, since the first supply conveyor section 4x includes the right-angle conveyance section 9, the conveyance conveyor 4x
It is transported at right angles via xd and 22. The relative height of the conveyors 4xd and 22 and the conveyor 4
By setting the moving speed of xd, the mail M can be thrown into a fixed position on the conveyor 22. This conveyor 4xd
And 22 always rotate.

On the other hand, the mail M supplied to the first mail sorting system Sdx (the same applies to the second mail sorting system Sdy) is conveyed by the main conveyor section 72 and is switched by the switching conveyor 74 to the inclined conveyor. 76. FIG. 7 shows a case where the sheet is conveyed to the third stage of the horizontal direction unit 90a as an example. In this case, the second switching conveyor 74 from the front in the transport direction is displaced to the take-up position rising upward. As a result, the mail M is taken into the inclined conveyor 76 along the arrow F. Note that the switching timing of the switching conveyor 74 is determined by setting a sensor for detecting the passage of the mail M on each of the conveyors 73.
The corresponding switching conveyor 74 is displaced to the take-in position based on the detection by the sensor of the transport conveyor 73 in front of the unit (for example, two units). In addition, the switching conveyor 74
The mail attached to the inclined conveyor 76 by the sensor attached to
Is detected, the switching conveyor 74 is displaced to a horizontal passing position.

Then, the postal matter M is the target division box B.
, The conveyor 91 in front of the sorting box B is displaced to the take-down position lowered forward, and the mail M is put into the sorting box B. FIG. 8 shows, as an example, a case of taking in the sorting box B located at the forefront in the transport direction. In this case, the second front conveyor 91 in the conveying direction is displaced to the front lowering take-in position shown by the imaginary line to take in the postal matter M, and when the take-up of the postal matter M is completed, it is shown by the solid line. Displace to a horizontal passing position. Incidentally, the timing for displacing the transport conveyor 91 to the take-in position is such that a sensor for detecting the passage of the mail M is attached to each transport conveyor 91.
(2) The corresponding conveyor 91 is displaced to the take-in position based on the detection by the sensor of the conveyor 91 in front. In addition, the sensor attached to the conveyor 91 detects that the take-in of the mail M is completed,
The conveyor 91 is displaced to a horizontal passing position.

The embodiment has been described in detail above.
The present invention is not limited to such an embodiment.
For example, although each conveyor is exemplified by a belt conveyor in which a single or a plurality of endless belts are installed between a driving roller and an idler roller, the use of other types of conveyors is not hindered. In addition, the configuration, shape, and number of details, particularly the number of introduction units, can be arbitrarily changed without departing from the gist of the present invention.

[0039]

As described above, the mail introducing mechanism of the mail sorting apparatus according to the present invention is provided with a conveyor for supplying mails to the first mail sorting system and a mail arranged above and above the conveyor. A first supply conveyer unit having a standby conveyer for holding the postal matter waiting for, and putting the postal matter on standby on the empty conveyor, and disposing the first postal supply unit in parallel with the first supply conveyer unit, and It has a transport conveyor that supplies mail to the mail sorting system, and a standby conveyor that is arranged above the transport conveyor to wait for the supplied mail and to put the held mail on an empty transport conveyor. The second supply conveyor section, between the respective supply conveyor sections, is disposed above the both supply conveyor sections, and is rotated and moved in the forward or reverse direction to distribute the supplied mail to the respective supply conveyor sections. A plurality of introduction units each having a distribution conveyor section and an introduction mechanism section arranged above the distribution conveyor section and introducing mail to the distribution conveyor section, wherein the first supply conveyor section in each introduction unit is provided. And the second supply conveyor unit are configured to be connectable, so that the number of mail pieces that can be processed per unit time can be increased as necessary, and
This has a remarkable effect that the flexibility and versatility for different use places and user requirements can be dramatically improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a mail introduction mechanism according to the present invention;

FIG. 2 is an overall plan view of a mail sorting apparatus provided with the mail introduction mechanism;

FIG. 3 is an overall perspective view of the mail sorting apparatus;

FIG. 4 is a plan view of an introduction unit in the mail sorting apparatus;

FIG. 5 is a front view of an introduction unit in the mail sorting apparatus;

FIG. 6 is a side view of an introduction unit in the mail sorting apparatus;

FIG. 7 is a front view of a vertical sorting unit in the mail sorting apparatus;

FIG. 8 is a principle configuration diagram showing a part of a horizontal sorting unit in the mail sorting apparatus;

[Explanation of symbols]

 D Mail sorting device 1 Mail introduction mechanism 2 ... Introductory conveyor section 3 Introducing mechanism section 4x First supply conveyor line 4y Second supply conveyor line 4xu ... First supply conveyor section 4yu ... Second supply conveyor section 4xa ... Transport conveyor 4ya … Conveyor 4xs Standby Conveyor 4ys Standby Conveyor 5a Introducing Unit 5b Introducing Unit 5c Introducing Unit 7 Distributing Conveyor Unit Si Mail Introducing System Sd Mail Sorting System Sdx First Mail Sorting System Sdy Second Mail Sorting System M ... Mail Object B ... Sorting box

Continuing on the front page (72) Inventor Kazuji Urahashi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Corporation (72) Inventor Hiroshi Sakamoto 1163 Shimosei Plane, Inari-cho, Nagano City, Nagano Prefecture Nagano Japan Radio Co., Ltd. In-company (72) Inventor Masahiro Kato 1163 Shimo-Himei, Inari-cho, Nagano-shi, Nagano Nagano Japan Radio Co., Ltd. (56) References JP-A-55-159880 (JP, A) JP-A-52-108895 (JP, A) (58) Field surveyed (Int.Cl. ⁶ , DB name) B07C 3/08 B65G 47/64-47/72

Claims (1)

(57) [Claims] 1. A mail introduction mechanism of a mail sorting apparatus for feeding mail to a mail sorting system having a plurality of sorting boxes into which mail is sorted, wherein the mail is supplied to a first mail sorting system. A first supply conveyor section having a transport conveyor and a standby conveyor for arranging the postal matter arranged and supplied above the transporter conveyor and for putting the postal matter on standby on an empty transport conveyor; A transport conveyor arranged in parallel with the supply conveyor section and supplying the mail to the second mail sorting system, and the mail arranged above the transport conveyor to make the mail supplied stand by, and the mail to be kept on standby The second supply conveyor unit having a standby conveyor for putting the objects on the empty conveyor and the supply conveyor units are disposed between the supply conveyor units and above the two supply conveyor units, and are rotatably moved in the forward or reverse direction. With this, a plurality of distribution conveyors that distribute the supplied mail to each supply conveyor, and an introduction mechanism that is disposed above the distribution conveyor and introduces the mail to the distribution conveyor. A mail introduction mechanism of a mail sorting apparatus, characterized in that the first supply conveyor section and the second supply conveyor section of each introduction unit are connected to each other.