CN112828483A

CN112828483A - Plate-slag separating mechanism of laser cutting machine

Info

Publication number: CN112828483A
Application number: CN202011558448.7A
Authority: CN
Inventors: 程叔娥
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-05-25

Abstract

The invention belongs to the technical field of novel processing, and particularly relates to a plate and slag separating mechanism of a laser cutting machine, which comprises a collecting box, wherein a plate supporting mechanism is arranged above the collecting box, the collecting box is divided into a slag bin and a storage bin by a partition plate, openings are formed in the upper ends of the slag bin and the storage bin, a movable door is arranged on the partition plate between the slag bin and the storage bin, and the movable door is assembled to move between the following two stations: in a working position a, the upper end of a slag bin is opened and the upper end of a bin is closed by a movable door; the movable door closes the upper end of the slag bin and opens the upper end of the bin; the flitch supporting mechanism comprises a plurality of fixed supporting parts and a plurality of movable supporting parts. The movable support part is utilized to realize the staged falling of the welding slag and the cutting piece, and the guide of the movable door is utilized to ensure that the welding slag and the cutting piece respectively fall in different collecting areas, thereby realizing the effective isolation of the welding slag and the cutting piece and avoiding the welding slag from polluting the cutting piece.

Description

Plate-slag separating mechanism of laser cutting machine

Technical Field

The invention belongs to the technical field of novel processing, and particularly relates to a plate-slag separating mechanism of a laser cutting machine.

Background

In recent years, laser cutting machines have been generally favored in the field of machining because of their high-precision and high-efficiency machining characteristics. However, the laser cutting machine in the prior art still has many defects to be solved urgently in use, for example, the laser cutting machine can generate a large amount of high-temperature welding slag when processing metal raw materials, the cutting piece can directly drop downwards after the cutting piece is cut off by the existing laser cutting machine, so that the cutting piece and the welding slag are mixed together, the collection of the cutting piece is not facilitated, and the high-temperature welding slag generated in the subsequent cutting process can be very attached to the cutting piece below, so that the later cleaning of the cutting piece is troublesome.

Disclosure of Invention

The invention aims to provide a plate-slag separating mechanism of a laser cutting machine, which can separate welding slag generated during cutting from a cutting piece and avoid the welding slag from fouling the cutting piece.

The technical scheme adopted by the invention is as follows:

the utility model provides a laser cutting machine's board sediment separating mechanism, includes the collecting box, the collecting box top is equipped with sheet material supporting mechanism, and the collecting box is separated for sediment storehouse and feed bin by the baffle, and sediment storehouse and feed bin upper end are equipped with the opening, are equipped with the dodge gate on the baffle between sediment storehouse and the feed bin, and the dodge gate is assembled for the activity between following two stations: in a working position a, the upper end of a slag bin is opened and the upper end of a bin is closed by a movable door; the movable door closes the upper end of the slag bin and opens the upper end of the bin; flitch supporting mechanism includes a plurality of fixed stay portions and a plurality of movable support portion, the relative swing joint of movable support portion and fixed stay portion, and both are assembled to switch between following two stations: the cutting device comprises a station I, a station I and a station II, wherein the top end of a movable supporting part is flush with the top end of a fixed supporting part, the movable supporting part and the fixed supporting part support a flitch together, the fixed supporting part is supported in a non-cutting area of the flitch, and the movable supporting part is supported in a cutting area of the flitch and can support a cut piece so as to prevent the cut piece from falling down after being disconnected from the flitch; and a second station, wherein the fixed supporting part keeps the supporting state unchanged, and the movable supporting part is removed from the lower part of the cutting area of the flitch, so that the cut cutting piece falls downwards.

The slag bin and the bin are provided with a plurality of slag bins and the bin are alternately arranged along the length direction of the collecting box, a shared wall is arranged between every two adjacent slag bins and the bin, the upper end of each shared wall is respectively pivoted with a movable door, the two movable doors form a vault above the bin when the two adjacent movable doors simultaneously turn over to the upper end of the bin, the movable doors are located at a station a at the moment, the two movable doors form a vault above the slag bin when the two adjacent movable doors simultaneously turn over to the upper end of the slag bin, and the movable doors are located at a station b at the moment.

The bottoms of the slag bins are communicated with each other, and slag discharge conveying belts passing through the slag bins in sequence are arranged at the bottoms of the slag bins.

The lateral wall of the collecting box is provided with a discharge port communicated with each bin, the bottom of each bin is provided with a discharge conveyer belt respectively, and the discharge conveyer belt extends to the outer side of the collecting box from the discharge port.

The hinge of the movable door is provided with a swing rod in a protruding manner along the radial direction, the end part of the swing rod is provided with a pin rod parallel to the hinge of the movable door, the side wall of the collecting box is provided with an arc-shaped through hole, the arc center of the arc-shaped through hole is positioned on the axis of the hinge of the movable door, the pin rod penetrates through the arc-shaped through hole to the outer side of the collecting box, the outer side of the collecting box is provided with a driving block reciprocating along the vertical direction, the driving block is provided with a horizontal waist-shaped hole, the pin rod and the horizontal waist-shaped hole form sliding fit, and the outer side of the collecting box is further.

The fixed supporting part and the movable supporting part are zigzag supporting plates which are arranged in parallel, the movable supporting part and the fixed supporting part are mutually far away from each other to support the cutting area of the flitch between each two adjacent fixed supporting parts in the first station state, and the movable supporting part is close to the fixed supporting part to avoid the cutting area of the flitch in the second station state.

The utility model provides a lathe bed subassembly of laser cutting machine, includes board sediment separating mechanism, board sediment separating mechanism includes the collecting box, the collecting box top is equipped with sheet material supporting mechanism, and the collecting box is separated for sediment storehouse and feed bin by the baffle, and sediment storehouse and feed bin upper end are equipped with the opening, are equipped with the dodge gate on the baffle between sediment storehouse and the feed bin, and the dodge gate is assembled for the activity between following two stations: in a working position a, the upper end of a slag bin is opened and the upper end of a bin is closed by a movable door; the movable door closes the upper end of the slag bin and opens the upper end of the bin; flitch supporting mechanism includes a plurality of fixed stay portions and a plurality of movable support portion, the relative swing joint of movable support portion and fixed stay portion, and both are assembled to switch between following two stations: the cutting device comprises a station I, a station I and a station II, wherein the top end of a movable supporting part is flush with the top end of a fixed supporting part, the movable supporting part and the fixed supporting part support a flitch together, the fixed supporting part is supported in a non-cutting area of the flitch, and the movable supporting part is supported in a cutting area of the flitch and can support a cut piece so as to prevent the cut piece from falling down after being disconnected from the flitch; the fixed supporting part keeps the supporting state unchanged, and the movable supporting part is removed from the lower part of the cutting area of the flitch, so that the cut cutting piece falls downwards; when the flitch supporting mechanism is in the station I, the movable door is in the station a, and when the flitch supporting mechanism is in the station II, the movable door is in the station b.

The invention has the technical effects that: the movable support part is utilized to realize the staged falling of the welding slag and the cutting piece, and the guide of the movable door is utilized to ensure that the welding slag and the cutting piece respectively fall in different collecting areas, thereby realizing the effective isolation of the welding slag and the cutting piece and avoiding the welding slag from polluting the cutting piece.

Drawings

Fig. 1 is a partial perspective view of a bed assembly provided by an embodiment of the present invention;

FIG. 2 is a partial perspective view of another perspective of the bed assembly provided by an embodiment of the present invention;

FIG. 3 is an outside partial view of a bed assembly provided by an embodiment of the present invention;

FIG. 4 is an inside partial view of a bed assembly provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of the state switching of the sheet supporting mechanism according to the embodiment of the present invention;

FIG. 6 is a cross-sectional view of a transmission provided by an embodiment of the present invention;

FIG. 7 is a perspective view of a transmission provided by an embodiment of the present invention;

fig. 8 is a perspective view of another perspective of the transmission mechanism provided by the embodiment of the present invention.

Detailed Description

In order that the objects and advantages of the invention will be more clearly understood, the following description is given in conjunction with the accompanying examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed.

Example 1

As shown in fig. 1 to 8, a bed assembly of a laser cutting machine includes a material plate supporting mechanism 40 and a collecting box 50 disposed below the material plate supporting mechanism 40, the material plate supporting mechanism 40 includes a plurality of fixed supporting portions 41 and a plurality of movable supporting portions 42, the movable supporting portions 42 are movably connected with the fixed supporting portions 41, and the two are assembled to be capable of switching between: in the first station, the top end of the movable supporting part 42 is flush with the top end of the fixed supporting part 41, the movable supporting part 42 and the fixed supporting part 41 support the flitch together, the fixed supporting part 41 is supported in a non-cutting area of the flitch, and the movable supporting part 42 is supported in a cutting area of the flitch and can support a cut piece after cutting so as to prevent the cut piece from falling down after being disconnected from the flitch; and a second station, wherein the fixed supporting part 41 keeps the supporting state unchanged, and the movable supporting part 42 is removed from the lower part of the cutting area of the flitch, so that the cut cutting piece falls downwards; the collecting box 50 is divided into a slag bin 52 and a bin 51 by a partition plate 501, the upper ends of the slag bin 52 and the bin 51 are provided with openings, a movable door 53 is arranged on the partition plate 501 between the slag bin 52 and the bin 51, and the movable door 53 is assembled to move between the following two stations: in a working position a, the upper end of the slag bin 52 is opened by a movable door 53, and the upper end of the bin 51 is closed; and a station b, wherein the upper end of the slag bin 52 is closed and the upper end of the bin 51 is opened by a movable door 53; the fixed supporting part 41 and the movable supporting part 42 are both zigzag supporting plates which are arranged in parallel, in the state of the first station, the movable supporting part 42 and the fixed supporting part 41 are arranged away from each other to support the cutting area of the material plate between the adjacent fixed supporting parts 41, and in the state of the second station, the movable supporting part 42 is close to the fixed supporting part 41 to avoid the cutting area of the material plate; every two movable supporting parts 42 and one fixed supporting part 41 form a supporting unit, the two movable supporting parts 42 in one supporting unit are respectively positioned at two sides of the fixed supporting part 41 of the supporting unit, and the distance between the supporting units is adjustable; a transmission mechanism is arranged between the movable door 53 and the material plate supporting mechanism 40, and the transmission mechanism is assembled in such a way that the material plate supporting mechanism 40 can be switched from the first station to the second station after the movable door 53 moves from the station a to the station b, and the material plate supporting mechanism 40 can be gradually switched from the second station to the first station in the process that the movable door 53 moves from the station b to the station a.

As shown in fig. 4 and 6-8, the supporting unit further includes a sliding bracket 43 fixedly connected to two ends of the fixed supporting portion 41, a lifting seat 44 movably connected to the sliding bracket 43 along the vertical direction is disposed on the sliding bracket 43, two anchor blocks 45 slidably connected to the lifting seat 44 along the horizontal direction are disposed on the lifting seat 44, and the two anchor blocks 45 are fixedly connected to the ends of the two movable supporting portions 42 in the supporting unit respectively; the two anchor blocks 45 are slidably connected with the sliding bracket 43 along the inclined direction, so that the two movable supporting parts 42 and the fixed supporting part 41 can be driven to move close to or away from each other when the lifting seat 44 moves up and down relative to the sliding bracket 43.

As shown in fig. 2 and 4, the slag bin 52 and the storage bin 51 are provided with a plurality of slag bins 52 and storage bins 51, the slag bins 52 and the storage bins 51 are alternately arranged along the length direction of the collecting box 50, a common wall is arranged between the adjacent slag bins 52 and the storage bins 51, the upper end of each common wall is respectively pivoted with a movable door 53, when the adjacent movable doors 53 simultaneously turn towards the upper end of the storage bin 51, the two movable doors 53 form a vault above the storage bin 51, at this time, the movable doors 53 are located at a working position a, when the adjacent movable doors 53 simultaneously turn towards the upper end of the slag bin 52, the two movable doors 53 form a vault above the slag bin 52, and at this time, the movable doors 53 are located at; the pivot of the movable door 53 is convexly extended along the radial direction to form a swing rod 531, the end part of the swing rod 531 is provided with a pin rod parallel to the pivot of the movable door 53, the side wall of the collecting box 50 is provided with an arc-shaped through hole, the arc center of the arc-shaped through hole is positioned on the pivot axis of the movable door 53, the pin rod penetrates through the arc-shaped through hole to the outer side of the collecting box 50, the outer side of the collecting box 50 is provided with a driving block 56 which reciprocates along the vertical direction, the driving block 56 is provided with a horizontal waist-shaped hole, and the pin rod and the horizontal waist-shaped hole form sliding.

As shown in fig. 6-8, the transmission mechanism includes a horizontally disposed channel-steel-shaped linear chute 47, the linear chute 47 is slidably connected to the sidewall of the collecting box 50 along the vertical direction, the lifting seat 44 is provided with a guide roller 441, and the guide roller 441 is disposed in the linear chute 47 and forms a rolling fit therewith; the transmission mechanism further comprises a lifting cross beam 54 movably connected with the side wall of the collecting box 50 along the vertical direction, a top block 541 is arranged on the lifting cross beam 54, and the top block 541 is in blocking connection with a stop pin 471 arranged on the linear sliding groove 47 so that the linear sliding groove 47 can be jacked upwards when the lifting cross beam 54 ascends; the driving block 56 is fixedly connected with the lifting cross beam 54; a first elastic element 46 is further arranged between the lifting seat 44 and the sliding bracket 43, and the first elastic element 46 is assembled to enable the elastic force thereof to drive the lifting seat 44 to move downwards relative to the sliding bracket 43; a locking mechanism 57 is arranged between the linear sliding chute 47 and the side wall of the collecting box 50, the locking mechanism 57 is assembled to enable the lower sliding chute to be kept in a lifting state when the lifting beam 54 pushes the linear sliding chute 47 to the lifting state, and enable the locking mechanism 57 to release the linear sliding chute 47 when the lifting beam 54 descends to a specified position; the specified position refers to the position of the lifting beam 54 when the driving block 56 just drives the movable door 53 to the station b; the lifting cross beam 54 is fixedly connected with a piston rod of a piston cylinder 55 which is vertically arranged.

As shown in fig. 7 and 8, the locking mechanism 57 includes a locking tongue 571 slidably connected to the side wall of the collecting box 50 along the horizontal direction, the locking tongue 571 protrudes to the moving path of the linear sliding groove 47, the lower end of the locking tongue 571 is provided with an inclined wedge surface, so that the locking tongue 571 can be pushed away from the lifting path of the linear sliding groove 47 when the linear sliding groove 47 passes through the locking tongue 571 from bottom to top, a second elastic element 572 is arranged between the locking tongue 571 and the side wall of the collecting box 50, and the second elastic element 572 is assembled such that the elastic force thereof can drive the locking tongue 571 to protrude to the moving path of the linear sliding groove 47; the locking tongue 571 is further provided with a wedge 573, the lifting beam 54 is provided with a wedge driving block 574 matched with the wedge 573, and when the lifting beam 54 moves downwards to the designated position, the wedge driving block 574 can push the wedge 573 and draw the locking tongue 571 out of the moving path of the linear sliding groove 47.

As shown in fig. 2 and 6, the sliding brackets 43 are slidably disposed on straight rails disposed on two sides of the machine tool cutting machine, and a distance adjustment driving mechanism for driving the sliding brackets 43 to approach or depart from each other is disposed beside the straight rails.

The distance adjusting driving mechanism comprises a scissor type telescopic support 48, the scissor type telescopic support 48 is arranged at the side of the machine tool in a telescopic mode along the horizontal direction, each sliding support 43 is pivoted with each central joint of the scissor type telescopic support 48 or is pivoted with each side joint of the scissor type telescopic support 48 in a sliding mode, and one end of the scissor type telescopic support 48 is fixedly connected with or pivoted with the side wall of the machine tool.

The side of the machine tool is further provided with a screw motor 481, one of the sliding supports 43 is provided with a nut block, and the nut block and a screw of the screw motor 481 form a threaded fit.

Preferably, as shown in fig. 2, the bottoms of the slag bins 52 are communicated with each other, and a slag discharging conveyer belt 521 is disposed at the bottom of each slag bin 52 and sequentially passes through each slag bin 52.

The side wall of the collecting box 50 is provided with a discharge port communicated with each bin 51, the bottom of each bin 51 is provided with a discharge conveyer belt 511, and the discharge conveyer belt 511 extends to the outer side of the collecting box 50 from the discharge port.

Example 2

The blanking method of the lathe bed component of the laser cutting machine in the embodiment 1 comprises the following steps:

step 1: supporting a cutting area and a non-cutting area of a plate to be cut;

step 2: the laser cutting machine cuts the plate, and the cut parts which are cut are kept in a supporting state before all cutting areas on the plate are cut;

and step 3: and after all cutting areas of the plate are cut, removing the supports below all cutting pieces formed by cutting, and enabling the cutting pieces to fall downwards and collect.

Keeping the movable door 53 at the station a in step 2; the movable door 53 is held at the station b in step 3.

And the plate supporting mechanism in the step 2 is kept at a first station, and the plate supporting mechanism in the step 3 is kept at a second station.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.

Claims

1. The utility model provides a laser cutting machine's board sediment separating mechanism which characterized in that: including collecting box (50), collecting box (50) top is equipped with sheet material supporting mechanism, and collecting box (50) are separated for sediment storehouse (52) and feed bin (51) by baffle (501), and sediment storehouse (52) and feed bin (51) upper end are equipped with the opening, are equipped with dodge gate (53) on baffle (501) between sediment storehouse (52) and feed bin (51), and dodge gate (53) are assembled for the activity between following two stations: in a working position a, the upper end of a slag bin (52) is opened by a movable door (53) and the upper end of a storage bin (51) is closed; and a station b, wherein the upper end of the slag bin (52) is closed and the upper end of the storage bin (51) is opened by a movable door (53); the flitch supporting mechanism (40) comprises a plurality of fixed supporting parts (41) and a plurality of movable supporting parts (42), the movable supporting parts (42) are movably connected with the fixed supporting parts (41) relatively, and the movable supporting parts (42) and the fixed supporting parts (41) are assembled to be capable of being switched between the following two stations: in the first station, the top end of the movable supporting part (42) is flush with the top end of the fixed supporting part (41), the movable supporting part and the fixed supporting part support the flitch together, the fixed supporting part (41) is supported in a non-cutting area of the flitch, and the movable supporting part (42) is supported in a cutting area of the flitch and can support a cut piece after cutting so as to prevent the cut piece from falling down after being disconnected from the flitch; and a second station, wherein the fixed supporting part (41) keeps the supporting state unchanged, and the movable supporting part (42) is removed from the lower part of the cutting area of the flitch, so that the cut cutting piece falls downwards.

2. The plate-slag separating mechanism of a laser cutting machine according to claim 1, characterized in that: the slag bin (52) and the bin (51) are provided with a plurality of slag bins (52) and bins (51) which are alternately arranged along the length direction of the collecting box (50), a shared wall is arranged between the adjacent slag bins (52) and the bins (51), the upper end of each shared wall is respectively pivoted with a movable door (53), when the two adjacent movable doors (53) are simultaneously turned over towards the upper end of the bin (51), a vault is formed above the bin (51) by the two movable doors (53), at the moment, the movable doors (53) are positioned at a station a, when the two adjacent movable doors (53) are simultaneously turned over towards the upper end of the slag bin (52), a vault is formed above the slag bin (52) by the two movable doors (53), and at the moment, the movable doors (53) are positioned at a station b.

3. The plate-slag separating mechanism of a laser cutting machine according to claim 2, characterized in that: the bottoms of the slag bins (52) are communicated with each other, and slag discharge conveying belts (521) passing through the slag bins (52) in sequence are arranged at the bottoms of the slag bins (52).

4. The plate-slag separating mechanism of a laser cutting machine according to claim 2, characterized in that: the side wall of the collecting box (50) is provided with a discharge port communicated with each bin (51), the bottom of each bin (51) is provided with a discharge conveyer belt (511), and the discharge conveyer belt (511) extends to the outer side of the collecting box (50) from the discharge port.

5. The plate-slag separating mechanism of a laser cutting machine according to claim 2, characterized in that: the movable door is characterized in that a swing rod (531) is arranged on a pivot of the movable door (53) in a protruding manner along the radial direction, a pin rod parallel to the pivot of the movable door (53) is arranged at the end of the swing rod (531), an arc-shaped through hole is formed in the side wall of the collecting box (50), the arc center of the arc-shaped through hole is located on the pivot axis of the movable door (53), the pin rod penetrates through the arc-shaped through hole to the outer side of the collecting box (50), a driving block (56) which reciprocates along the vertical direction is arranged on the outer side of the collecting box (50), a horizontal waist-shaped hole is formed in the driving block (56), the pin rod and the horizontal waist-shaped hole form sliding fit, and a piston cylinder (55) used for driving the driving block (56) to.

6. The plate-slag separating mechanism of a laser cutting machine according to claim 1, characterized in that: the fixed supporting part (41) and the movable supporting part (42) are zigzag supporting plates which are arranged in parallel, the movable supporting part (42) and the fixed supporting part (41) are far away from each other to support a flitch cutting area between every two adjacent fixed supporting parts (41) in a first station state, and the movable supporting part (42) is close to the fixed supporting part (41) to avoid the flitch cutting area in a second station state.

7. The utility model provides a lathe bed subassembly of laser cutting machine tool which characterized in that: the plate and slag separating mechanism comprises a collecting box (50), a plate supporting mechanism is arranged above the collecting box (50), the collecting box (50) is separated into a slag bin (52) and a stock bin (51) by a partition plate (501), openings are formed in the upper ends of the slag bin (52) and the stock bin (51), a movable door (53) is arranged on the partition plate (501) between the slag bin (52) and the stock bin (51), and the movable door (53) is assembled to move between the following two stations: in a working position a, the upper end of a slag bin (52) is opened by a movable door (53) and the upper end of a storage bin (51) is closed; and a station b, wherein the upper end of the slag bin (52) is closed and the upper end of the storage bin (51) is opened by a movable door (53); the flitch supporting mechanism (40) comprises a plurality of fixed supporting parts (41) and a plurality of movable supporting parts (42), the movable supporting parts (42) are movably connected with the fixed supporting parts (41) relatively, and the movable supporting parts (42) and the fixed supporting parts (41) are assembled to be capable of being switched between the following two stations: in the first station, the top end of the movable supporting part (42) is flush with the top end of the fixed supporting part (41), the movable supporting part and the fixed supporting part support the flitch together, the fixed supporting part (41) is supported in a non-cutting area of the flitch, and the movable supporting part (42) is supported in a cutting area of the flitch and can support a cut piece after cutting so as to prevent the cut piece from falling down after being disconnected from the flitch; and a second station, wherein the fixed supporting part (41) keeps the supporting state unchanged, and the movable supporting part (42) is removed from the lower part of the cutting area of the flitch, so that the cut cutting piece falls downwards; when the flitch supporting mechanism (40) is in the first station, the movable door (53) is in the first station, and when the flitch supporting mechanism (40) is in the second station, the movable door (53) is in the second station.

8. The bed assembly of the laser cutting machine according to claim 7, wherein: the slag bin (52) and the bin (51) are provided with a plurality of slag bins (52) and bins (51) which are alternately arranged along the length direction of the collecting box (50), a shared wall is arranged between the adjacent slag bins (52) and the bins (51), the upper end of each shared wall is respectively pivoted with a movable door (53), when the two adjacent movable doors (53) are simultaneously turned over towards the upper end of the bin (51), a vault is formed above the bin (51) by the two movable doors (53), at the moment, the movable doors (53) are positioned at a station a, when the two adjacent movable doors (53) are simultaneously turned over towards the upper end of the slag bin (52), a vault is formed above the slag bin (52) by the two movable doors (53), and at the moment, the movable doors (53) are positioned at a station b.

9. The bed assembly of the laser cutting machine according to claim 8, wherein: the bottoms of the slag bins (52) are communicated with each other, and slag discharge conveying belts (521) passing through the slag bins (52) in sequence are arranged at the bottoms of the slag bins (52).

10. The bed assembly of the laser cutting machine according to claim 9, wherein: the side wall of the collecting box (50) is provided with a discharge port communicated with each bin (51), the bottom of each bin (51) is provided with a discharge conveyer belt (511), and the discharge conveyer belt (511) extends to the outer side of the collecting box (50) from the discharge port.