JP2018103126A - Wiper mechanism of optical sorter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper mechanism of an optical sorter capable of cleaning a transparent plate of an optical part, without staining a reciprocating driving mechanism of a wiper by dust, in the present invention.SOLUTION: A wiper mechanism of an optical part in an optical sorter of the present invention, is the optical part of the optical sorter having a dropping space for dropping a selection object and a sealed space for arranging optical detection means for detecting the selection object, and having a transparent plate capable of detecting the selection object by the optical detection means on a partition wall of both spaces, and a wiper for cleaning the transparent plate by abutting on the transparent plate is arranged in the dropping space of the optical part, and a reciprocating driving mechanism for sliding the wiper along the transparent plate is arranged in the sealed space, and the wiper and a movable part of the reciprocating driving mechanism are integrally movably connected by magnetic force via the partition wall of both spaces.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an optical sorting machine that sorts granular materials such as grains and resin pellets or sheet-like materials such as laver based on color and the like, and in particular for cleaning a transparent plate of an optical part in the optical sorting machine. It relates to a wiper mechanism.

  Conventional materials such as grains of rice, wheat, beans, nuts, etc., resin pieces such as pellets and beads, fine articles such as pharmaceuticals, ores, shirasu, other granular materials and sheet-like materials, etc. Based on the above, an optical sorter that sorts non-defective products and defective products and eliminates foreign matters mixed in raw materials is well known.

  The optical sorter detects particulate matter falling from the lower end of the chute by an optical detection device in the optical unit, determines pass / fail based on the detection signal, and excludes it from the fall trajectory based on the pass / fail determination result. Then, they are sorted and discharged according to quality.

By the way, the optical sorter provides a sealed space in the optical unit, and a light source, a background, and a light receiving sensor constituting the optical detection device are disposed in the sealed space, and the particulate matter in the sealed space. A transparent plate made of glass or the like is attached to the partition wall on the detection side.
Thereby, the optical sorter prevents the optical detection device from being contaminated by dust or the like scattered when the granular material is dropped, and enables the optical detection device to detect the granular material. Can do.

  However, the optical sorting machine has a problem that the sorting accuracy is lowered because the dust or the like adheres to the surface of the optical plate on the space side where the granular material or the like falls.

  In view of this, a wiper mechanism has been proposed that cleans the surface of the transparent plate on the space side where the granular material or the like falls with a wiper (see Patent Documents 1 to 3).

In the wiper mechanism described in Patent Document 1, a screw shaft is disposed in a space in which particulate matter or the like falls, and the wiper is driven to reciprocate using the operation of the screw shaft.
Further, the wiper mechanism described in Patent Document 2 is configured to dispose an endless wire in a space where a granular material or the like falls, and to reciprocate the wiper using the operation of the endless wire.
Further, the wiper mechanism described in Patent Document 3 has a rodless cylinder disposed in a space where particulate matter or the like falls, and reciprocally drives the wiper using the operation of the rodless cylinder.

According to the wiper mechanism described in Patent Documents 1 to 3, the surface of the transparent plate on which the granular material or the like falls can be cleaned by the wiper in the optical unit. A reduction in sorting accuracy can be prevented.
However, all of the wiper mechanisms described in Patent Documents 1 to 3 are provided with a reciprocating drive mechanism of a wiper in a space in which particulate matter or the like falls, and the reciprocating drive mechanism is damaged by the dust or the like. There's a problem.

Microfilm of Japanese Utility Model No. 55-33089 (Japanese Utility Model Application No. 56-137782) JP 58-17341 A JP-A-2-21980

  Accordingly, an object of the present invention is to provide a wiper mechanism for an optical part in an optical sorter in which a reciprocating drive mechanism for a wiper that cleans a transparent plate of an optical part is not contaminated by dust or the like.

In order to achieve the above object, the wiper mechanism of the optical unit in the optical sorter of the present invention is:
A falling space in which the objects to be sorted fall; and a sealed space in which optical detection means for detecting the objects to be sorted are arranged, and the optical detection means detects the objects to be sorted in the partition walls of both spaces. An optical part of an optical sorter having a transparent plate,
A wiper that contacts the transparent plate and cleans the transparent plate is disposed in the fall space of the optical unit, and a reciprocating drive mechanism that slides the wiper along the transparent plate is disposed in the sealed space. And a movable part of the reciprocating drive mechanism are connected to each other so as to be integrally movable by a magnetic force through the partition walls of the both spaces.

The wiper mechanism of the optical part in the optical sorter of the present invention is
A magnet is attached to each of the wiper and the movable part of the reciprocating drive mechanism, and both the magnets are attracted via the transparent plate to connect the wiper and the movable part of the reciprocating drive mechanism so as to be movable together. Is preferred.

The wiper mechanism of the optical part in the optical sorter of the present invention is
An engaging portion having a C-shaped cross section is provided on the upper portion of the wiper, a guide shaft for reciprocating and guiding the wiper is disposed in the drop space, and the engaging portion of the wiper is detachably engaged with the guide shaft. It is preferable to do.

The wiper mechanism of the optical part in the optical sorter of the present invention is
It is preferable to provide an abutting portion to the partition wall at the tip of the engaging portion of the wiper.

The wiper mechanism of the optical part in the optical sorter of the present invention is
While the reciprocating drive mechanism includes a lead screw, a side plate of the drop space is provided with a reflector and a second wiper that contacts the reflector, and the rotation of the lead screw is transmitted via a power transmission mechanism. It is preferable that the wiper and the second wiper can be integrally driven by transmitting to the swing axis of the second wiper.

  In the optical sorter of the present invention, the wiper mechanism of the optical unit is a wiper that contacts the transparent plate in the fall space of the optical unit to clean the transparent plate, and the wiper slides in the sealed space along the transparent plate. The reciprocating drive mechanism is disposed, and the wiper and the movable part of the reciprocating drive mechanism are connected to each other so as to be integrally movable by the magnetic force through the partition walls of both the spaces, so that the reciprocating drive mechanism of the wiper is soiled by dust or the like. There is nothing.

  In the optical sorter of the present invention, the wiper mechanism of the optical part is provided with an engagement part having a C-shaped cross section at the upper part of the wiper, a guide shaft for reciprocating and guiding the wiper in the drop space, and the wiper If the engaging portion is detachably engaged with the guide shaft, the wiper can be easily replaced.

  The wiper mechanism of the optical part in the optical sorter according to the present invention is such that the contact part to the partition wall is provided at the tip of the engaging part of the wiper, even when the optical part is inclined. When the contact portion comes into contact with the partition wall, the wiper does not rotate about the guide shaft, and the wiper can be kept in contact with the transparent plate. In addition, even if a force that separates the wiper from the transparent plate acts on the wiper, the wiper and the movable part of the reciprocating drive mechanism are connected to each other by a magnetic force through the partition walls of both spaces, The wiper can be prevented from separating from the transparent plate.

  The wiper mechanism of the optical unit in the optical sorter of the present invention is a movable part of the wiper and the drive mechanism when the wiper being reciprocated is blocked by a human hand or an obstacle and an unexpected force is applied. When the magnet provided in is separated and only the movable part of the drive mechanism moves, it is possible to prevent the wiper from causing injury to the person and the obstacle and the wiper from being damaged. Further, when the movable part of the drive mechanism reciprocates again in a state where there is no obstacle to the movement of the wiper, the magnet attached to the wiper and the magnet attached to the movable part of the drive mechanism are attracted. The wiper separation can be self-recovered.

  The wiper mechanism of the optical part in the optical sorter according to the present invention is such that the reciprocating drive mechanism is provided with a lead screw, while a side plate of the drop space is provided with a reflector and a second wiper that contacts the reflector. If the rotation of the lead screw is transmitted to the swing shaft of the second wiper via a power transmission mechanism so that the wiper and the second wiper can be driven integrally, a new drive source It is possible to clean the reflector without providing a cover.

  Further, the wiper mechanism of the optical unit in the optical sorter of the present invention includes a light source / background module that irradiates light from above and below toward the object to be sorted flowing through the detection position of the optical unit. If present, the effect of the reflector can be maintained by cleaning the upper and lower sides of the reflector with the second wiper.

The perspective view of an optical sorter. The perspective view of an optical unit. The top view of an optical unit. It is a section perspective view of an optical unit, and is explanatory drawing in a fall space. BB sectional drawing of FIG. The perspective view of a wiper mechanism. Explanatory drawing of a lead screw. Explanatory drawing of a mode that a wiper is attached. The right view of a wiper mechanism. The top view of a side wiper module. The internal structure figure of a side wiper module.

Embodiments of the present invention will be described with reference to the drawings.
<Optical sorter>
FIG. 1 shows a perspective view of an example of an optical sorter.
The optical sorter 1 includes a granular material supply unit 2 that supplies granular materials, an optical unit 3 that selects granular materials, and a discharge unit 4 that discharges the granular materials after sorting.

The granular material supply unit 2 includes a raw material tank (not shown) and a chute 21 that supplies the granular material in the raw material tank to the optical unit 3.
The optical unit 3 includes an optical unit 30 that is installed at a predetermined position of the optical sorter 1 and sorts the granular material supplied from the granular material supply unit 2.
The discharge unit 4 includes a discharge hopper (not shown) that discharges the granular material selected by the optical unit 3 according to quality.

The optical unit 30 includes an optical detection device that detects particulate matter, an ejector device that eliminates particulate matter, a signal processing circuit board that processes a detection signal of the optical detection device to determine whether the particulate matter is good, and the signal The ejector drive circuit board that drives the ejector device based on the quality determination result of the processing circuit board is integrated with the casing 31 to unitize the optical unit 3.
In addition, the quality determination of the granular material in the optical unit 3 is not limited to the determination of the non-defective product and the defective material of the raw material that is a granular material, but also the determination of the raw material and the foreign matter mixed in the raw material, the determination of the type of the raw material, and the like Is included.

In the granular material supply unit 2, the granular material fed from the raw material tank flows down on the surface of the chute 21 and freely falls along a predetermined locus from the lower end of the chute 21.
The free-falling particulate matter is detected by the optical detection device in the optical unit 3, and the detection signal of the optical detection device is processed by the signal processing circuit board to determine whether it is acceptable. Then, an ejector device is driven by the ejector drive circuit board based on the pass / fail judgment result, and the ejector device removes the particulate matter from the fall trajectory and selects pass / fail.
The quality-sorted particulate matter is discharged from the discharge hopper according to quality in the discharge unit 4.

<Optical part>
FIG. 2 shows a perspective view of the optical unit. FIG. 3 shows a plan view of the optical unit.
The optical unit 30 includes a housing 31 having a particulate fall space S1 in the center.
The casing 31 mainly includes side frames 32a and 32b, cylindrical covers 34a and 34b, top plates 37a and 37b, and side covers 50 and 50.
The casing 31 includes a pair of optical detection devices (not shown) in front and rear of the fall space S1, an ejector device in the fall space S1 on the rear side, and signal processing (not shown) on the side of the fall space S1. A circuit board and an ejector drive circuit board are respectively disposed and integrated.

FIG. 4 is a cross-sectional perspective view of the optical unit and shows an explanatory view in the fall space S1. FIG. 5 is a side sectional view of the optical unit, and shows a sectional view taken along the line BB of FIG.
The casing 31 has a pair of side frames 32a and 32b on both sides of the falling space S1, and the both side frames 32a and 32b are connected by a plurality of shafts 33 to form a skeleton.

A pair of cylindrical covers 34a, 34b made of a composite plate of resin and metal and bent are disposed between the both side frames 32a, 32b and in front of and behind the fall space S1.
The respective components of the optical detection device such as camera modules 35a and 35b and light source / background modules 36a and 36b are arranged inside the cylindrical covers 34a and 34b, respectively. Openings for arranging the camera modules 35a, 35b and the like in the respective cylindrical covers 34a, 34b are provided on the upper portions of the respective cylindrical covers 34a, 34b, and the respective openings are provided on the top plates 37a, 37b. Is closed. The side frames 32a and 32b are provided with openings for arranging the light source / background modules 36a and 36b and the like in the cylindrical covers 34a and 34b. The openings are provided on the side covers 50 and 50, respectively. Is closed.
Here, the camera modules 35a and 35b have a function as a light receiving sensor for detecting a granular material.
Each of the cylindrical covers 34a and 34b is an opening, and packing is applied to a connecting portion with another member, and the inside is a sealed space S2.

Each cylindrical cover 34a, 34b is provided with an opening on the falling space S1 side, and transparent glass plates 38a, 38b constituting the front wall and the rear wall of the falling space S1 are attached to each opening. . Further, front wipers 61 and 61, which will be described later, are provided on the surfaces of the glass plates 38a and 38b on the drop space S1 side.
Instead of the glass plates 38a and 38b, transparent plates made of other materials can be attached to the openings provided on the drop space S1 side of the cylindrical covers 34a and 34b.

Each of the side frames 32a and 32b integrally includes end plates 41 and 41 constituting both side walls of the drop space S1, and is an upper portion of the end plates 41 and 41 on the inner surface of the drop space S1 side. Are fitted with a pair of mirrors 42, 42 for securing the light quantity on both sides of the fall space S1. Side wipers 81 and 81 to be described later are provided on the front surfaces of the mirrors 42 and 42, and side wiper modules to be described later for operating the side wipers 81 and 81 are provided outside the end plates 41 and 41. Is done.
Instead of the mirrors 42 and 42, a reflecting plate made of another material can be mounted on the inner surface of each of the end plates 41 and 41 on the falling space S1 side.

A valve module 45 including a nozzle, a valve, and a manifold is disposed in the fall space S1 on the rear side. Further, an anti-scattering plate 46 is disposed in the fall space S1 so as to face the valve module 45 on the front side.
The valve module 45 constitutes the ejector device, and is connected to an air pipe 47 disposed in a cylindrical cover 34b behind the drop space S1.

A signal processing circuit board 48 for processing the detection signal of the optical detection device and determining the quality of the granular material, respectively, outside the end plates 41 and 41 and below the side wiper modules, the signal processing An ejector drive circuit board 49 that drives the ejector device based on the quality determination result of the circuit board 48 is provided.
Side covers 50 and 50 are attached to the outer ends of the frames 32a and 32b outside the signal processing circuit board 48 and the ejector drive circuit board 49, respectively.

<Wiper mechanism>
FIG. 6 is an explanatory view of the wiper mechanism in the embodiment of the present invention, and shows a perspective view from the front right side. FIG. 7 is an explanatory view of the lead screw and its movable part. FIG. 8 is an explanatory diagram showing how the wiper is attached. FIG. 9 shows a right side view of the wiper mechanism. FIG. 10 shows a plan view of the side wiper module. FIG. 11 shows the internal structure of the side wiper module.
In the embodiment of the present invention, the optical unit 3 includes a pair of wiper mechanisms 60 disposed on the front side and the rear side of the fall space S1 to clean the glass plates 38a and 38b.
Since the pair of wiper mechanisms 60 has substantially the same configuration, the wiper mechanism 60 disposed on the rear side of the drop space S1 will be described as an example here.

  The wiper mechanism 60 is disposed in the optical space 3 on the side of the fall space S1 and is in contact with the glass plate 38b. The wiper mechanism 60 is inside the cylindrical cover 34b of the optical portion 3 and in the sealed space S2. And a front wiper module 71 that reciprocally drives the front wiper 61.

The front wiper 61 has a wiper frame 62, and a wiper blade 63 made of rubber, for example, is fixed to the wiper frame 62, and the wiper blade 63 abuts on the glass plate 38b. A magnet mounting portion 64 is formed on the wiper frame 62 above the position where the wiper blade 63 is fixed, and a magnet 65 is mounted on the magnet mounting portion 64.
An engaging portion 66 having a C-shaped cross section is provided at the upper portion of the wiper frame 62, and a contact portion 67 is provided at the distal end of the engaging portion 66.

A guide shaft 68 for guiding the movement of the front wiper 61 is disposed in the fall space S1 and on the upper front surface of the glass plate 38b. In the front wiper 61, the engaging portion 66 is detachably engaged with the guide shaft 68.
Further, the front wiper 61 abuts on the cylindrical cover 34b whose tip of the abutting portion 67 is positioned above the glass plate 38b.

The front wiper module 71 includes a lead screw 72, a motor 73 that rotationally drives the lead screw 72, a nut 74 that is mounted on the lead screw 72 and reciprocates as the lead screw 72 rotates, and the nut 74 is moved. A guide shaft 75 for guiding is provided.
The nut 74 is integrally formed with a magnet holder 76 that contacts the glass plate 38 b, and a magnet 77 is attached to the magnet holder 76.

  The wiper mechanism 60 includes a magnet 65 attached to the magnet attaching portion 64 of the front wiper 61 and a magnet 77 attached to the magnet holder 76 formed integrally with the nut 74, the glass plate 38b. The front wiper 61 and the nut 74 are connected so as to be able to move integrally.

  The wiper mechanism 60 in the embodiment of the present invention includes a front wiper 61 that contacts the glass plate 38b on the side of the drop space S1 of the optical unit 3, and a front wiper module that reciprocates the front wiper 61 in the sealed space S2. 71, and the magnet 65 on the front wiper 61 side and the magnet 77 on the front wiper module 71 side are attracted via the glass plate 38b, so that the nuts of the front wiper 61 and the front wiper module 71 are provided. 74 is connected so as to be integrally movable, so that the reciprocating drive mechanism of the front wiper 61 is not soiled by dust or the like.

  Further, the wiper mechanism 60 in the embodiment of the present invention is provided with an engaging portion 66 having a C-shaped cross section at the upper portion of the wiper frame 62, and the front portion of the front side of the glass plate 38b in the fall space S1. A guide shaft 68 for guiding the movement of the wiper 61 is provided, and the front wiper 61 is detachably engaged with the guide shaft 68 so that the front wiper 61 can be easily replaced. Become.

  Further, the wiper mechanism 60 in the embodiment of the present invention is provided with a contact portion 67 that contacts the cylindrical cover 34b positioned above the glass plate 38b at the tip of the engaging portion 66 of the wiper frame 62. Therefore, even when the optical unit 30 is inclined, the front wiper 61 rotates around the guide shaft 68 (engagement portion 66) as the contact portion 67 contacts the cylindrical cover 34b. The state which contact | abutted to the said glass plate 38b without moving is maintained. Even if a force separating the glass plate 38b is applied to the front wiper 61, the magnet 65 on the front wiper 61 side and the magnet 77 on the front wiper module 71 side are attracted via the glass plate 38b. Therefore, it is possible to prevent the front wiper 61 from being separated from the glass plate 38b.

  In the embodiment of the present invention, the wiper mechanism 60 is configured such that when the front wiper 61 that is reciprocating is blocked by a human hand or an obstacle, an unexpected force is applied, and the magnet 65 on the front wiper 61 side and the Since the magnet 77 on the front wiper module 71 side is separated and only the movable part such as the nut 74 of the front wiper module 71 moves, the front wiper 61 may cause injury to the person or the obstacle and the front wiper. It is possible to prevent 61 from being damaged. Further, when the movable part such as the nut 74 is reciprocated again in a state where there is no obstruction to the movement of the front wiper 61, the magnet 65 on the front wiper 61 side and the magnet 77 on the front wiper module 71 side are restored. Adsorption and the self-recovery of the separation of the front wiper 61 can be performed.

  In the above-described embodiment of the present invention, the magnet 65 on the front wiper 61 side and the magnet 77 on the front wiper module 71 side are attracted via the glass plate 38b. It can also be adsorbed through another partition wall that separates the fall space S1 and the sealed space S2.

In the embodiment of the present invention, the wiper mechanism 60 is further disposed on the inner surface of the drop space S1 and on the outer side of the drop space S1, and the side wiper 81 that contacts the mirrors 42 mounted on both sides. The side wiper module 91 is provided.
In the side wiper 81, for example, a rubber side wiper blade 83 is fixed to a side wiper frame 82, and the side wiper blade 83 contacts the mirror 42.

  The side wiper module 91 has a power transmission mechanism such as a gear train as shown in FIG. 11, and the rotation of the lead screw 72 is transmitted to the wiper shafts 104a and 104b of the side wiper 81 via the power transmission mechanism. Then, the side wiper 81 is driven to swing.

  In the movable part forward path of the front wiper module 71 (the path in which the movable part such as the nut 74 of the front wiper module 71 moves to the left in FIG. 8), the lead screw 72 and the pinion gear 78 shown in FIG. The swing gear 98 rotates through the idler two-stage gear 94, the idler 95, and the idler 96. At this time, the swing gear 98 meshes with the ring drive gear 99, the ring drive gear 99 rotates clockwise, and the lever gear 102 repeats forward and reverse rotation via the link 100 and the link arm 101. Further, the wiper gear 103a and the wiper gear 103b are rotated forward and backward by the rotation of the lever gear 102, and the side wipers 81 and 81 attached to the wiper gear 103a and the wiper gear 103b swing up and down.

  In the movable part return path of the front wiper module 71, the lead screw 72 and the pinion gear 78 shown in FIG. 11 rotate clockwise, and the swing gear 98 is passed through the idler two-stage gear 94, the idler 95, and the idler 96. Rotates. At this time, the swing gear 98 is not meshed with the ring drive gear 99 and the ring drive gear 99 is stopped. When the side wipers 81 and 81 are not in the horizontal state shown in FIG. 81 and 81 are pulled back to the horizontal position.

  If the side wipers 81 are on the upper side, the protrusion provided at the center of the fixed plate 109 serves as a stopper for the spring arm 107b, and the protrusion provided at the lower part of the centering gear 105 moves the spring arm 107a to the left. When the swing gear 98 and the ring drive gear 99 are disengaged in the pushed state, the spring arm 107a pulls back the protrusion of the centering gear 105 by the force of the spring 108, and the side wipers 81, 81 are moved horizontally. Return to the state.

  When the side wipers 81 are on the lower side, the protrusion provided at the center of the fixed plate 109 serves as a stopper for the spring arm 107a, and the protrusion provided at the lower part of the centering gear 105 is the spring arm 107b. When the swing gear 98 and the link drive gear 99 are disengaged, the spring arm 107b pulls back the protruding portion of the centering gear 105 by the force of the spring 108, and the side wiper 81, 81 is returned to the horizontal state.

  Accordingly, in the wiper mechanism 60 according to the embodiment of the present invention, the side wipers 81 and 81 perform a swinging motion in the forward path of the movable portion of the front wiper module 71 to clean the upper and lower portions of the mirror 42, and In the return path of the movable part of the wiper module 71, the side wipers 81 and 81 stop at a horizontal position where there is little light traveling toward the mirror.

  According to the wiper mechanism 60 in the embodiment of the present invention, the optical unit 3 includes the light source / background modules 36a and 36b that irradiate light from above and below toward the granular material flowing through the detection position. The effect of the mirror 42 can be maintained by cleaning the upper and lower sides of the mirror 42 with the side wipers 81, 81.

  In the wiper mechanism 60 according to the embodiment of the present invention, the front wiper module 71 is provided with a lead screw 72, and a mirror 42 and a side wiper 81 in contact with the mirror 42 are arranged on a side portion in the fall space S1. Since the rotation of the lead screw 72 is transmitted to the swing shaft 84 of the side wiper 81 via a power transmission mechanism, the front wiper 61 and the side wiper 81 can be driven integrally. The mirror 42 can be cleaned without providing a simple driving source.

  In the embodiment of the present invention, the wiper mechanism 60 is disposed in the unitized optical unit 3 as an example. However, the wiper mechanism 60 can also be applied to an optical unit 3 that is not unitized.

  In the above-described embodiment of the present invention, the wiper mechanism 60 is an example of a case where the wiper mechanism 60 is disposed in the optical unit of an optical sorting machine that selects the granular material flowing down on the surface of the chute. For example, it can also be arranged in the optical section of an optical sorter that selects granular materials, sheet-like materials, film-like materials and the like conveyed on a conveyor.

  Needless to say, the configuration of the wiper mechanism of the present invention is not limited to the above embodiment, and the configuration thereof can be changed as appropriate without departing from the scope of the present invention.

  The wiper mechanism of the present invention is extremely useful because the reciprocating drive mechanism of the wiper is not contaminated by dust or the like and the transparent plate of the optical part can be cleaned.

DESCRIPTION OF SYMBOLS 1 Optical sorter 2 Granular substance supply part 3 Optical part 4 Discharge part 21 Chute 30 Optical unit 31 Housing | casing 32a, 32b Side surface frame 33 Shaft 34a, 34b Cylindrical cover 35a, 35b Camera module 36a. 36b Light source / background module 37a, 37b Top plate 38a, 38b Glass plate (transparent plate)
41 End plate 42 Mirror (reflector)
45 Valve module 46 Anti-scattering plate 47 Air piping 48 Signal processing circuit board 49 Ejector drive circuit board 50 Side cover 60 Wiper mechanism 61 Front wiper 62 Wiper frame 63 Wiper blade 64 Magnet mounting part 65 Magnet 66 Engaging part 67 Abutting part 68 Guide shaft 71 Front wiper module 72 Lead screw 73 Motor 74 Nut 75 Guide shaft 76 Magnet holder 77 Magnet 78 Pinion gear 81 Side wiper 82 Side wiper frame 83 Side wiper blade 91 Side wiper module 92 Case 93 Cover 94 Idler double gear 95 Idler gear 96 Idler gear 97 Swing plate 98 Swing gear 99 Link drive gear 100 Link 101 Link Arm 102 Lever gear 103a, 103b Wiper gear 104a, 104b Wiper shaft 105 Centering gear 106 Bearing plate 107a, 107b Spring arm 108 Spring 109 Fixed plate S1 Drop space S2 Sealed space

Claims (5)

A falling space in which the objects to be sorted fall; and a sealed space in which optical detection means for detecting the objects to be sorted are arranged, and the optical detection means detects the objects to be sorted in the partition walls of both spaces. An optical part of an optical sorter having a transparent plate,
A wiper that contacts the transparent plate and cleans the transparent plate is disposed in the fall space of the optical unit, and a reciprocating drive mechanism that slides the wiper along the transparent plate is disposed in the sealed space. A wiper mechanism for an optical part in an optical sorter, wherein the movable part of the reciprocating drive mechanism and the movable part of the reciprocating drive mechanism are connected to each other by a magnetic force through the partition walls of both spaces.   A magnet is attached to each of the wiper and the movable part of the reciprocating drive mechanism, and the both magnets are attracted via the transparent plate to connect the wiper and the movable part of the reciprocating drive mechanism so as to be movable together. Item 2. A wiper mechanism of an optical part in the optical sorter according to Item 1.   An engaging portion having a C-shaped cross section is provided on the upper portion of the wiper, and a guide shaft for reciprocating and guiding the wiper is disposed in the drop space so that the engaging portion of the wiper can be attached to and detached from the guide shaft. The wiper mechanism of the optical part in the optical sorter of Claim 1 or 2 which engages.   The wiper mechanism of the optical part in the optical sorter according to claim 3, wherein a contact part to the partition wall is provided at a tip of the engaging part of the wiper.   While the reciprocating drive mechanism includes a lead screw, a side plate of the drop space is provided with a reflector and a second wiper that contacts the reflector, and the rotation of the lead screw is transmitted via a power transmission mechanism. The wiper mechanism of the optical part in the optical sorter according to any one of claims 1 to 4, wherein the wiper and the second wiper can be integrally driven by transmitting to a swing shaft of the second wiper.

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