JPH06451A - Grain layer thickness detector for rocking sorter - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To detect the grain layer thickness during the sorting of the swing sorting plate. [Structure] An uneven surface for sorting is formed on the upper surface of the sorting plate. One side in the vertical direction is a high supply side 16 and the other side is a low discharge side 16b, and one side in the horizontal direction is orthogonal to the vertical direction. A grain layer thickness detecting device for a rocking sorting plate 16 having a rocking side 16c on the side and a rocking side 16d on the opposite side, and is in contact with the upper surface of the grain layer flowing on the rocking sorting plate 16. The grain detection plate 39 that moves up and down moves to the grain detection plate 39.
And a detector 40 that moves up and down integrally with the light emitting element and the light receiving element of the layer thickness detecting sensor 35 when moving upward. [Effect] The grain layer thickness can be detected simply and more accurately than the one in which the grain flowing between the light emitting element and the light receiving element of the layer thickness detection sensor is directly introduced and detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain layer thickness detecting device on an oscillating sorting plate for sorting mixed grains such as paddy and brown rice.

[0002]

2. Description of the Related Art An oscillating sorting plate is provided with a rugged portion for sorting on a plate surface, and is inclined vertically from a high supply side on one side to a low discharge side on the other side to form paddy / brown rice. In the process of flowing mixed grains such as etc. from the supply side to the discharge side, small brown rice with a large specific gravity is placed on the upper side in the horizontal direction while reciprocating vertically in the horizontal direction orthogonal to the vertical direction. There is a large-sized paddy with a small specific gravity on the lower rocking side, and a rocking sorting plate that sorts and mixes mixed grains in the middle of these. Then, as an optical detection device for detecting the thickness of the grain layer flowing on the rocking selection plate, an optical detection device including a light emitting element and a light receiving element which is flush with the plate surface or protrudes upward by a predetermined height. Some devices are arranged.

[0003]

In the grain detecting device for such a rocking sorting plate, there is a drawback that the mounting of the detecting device on the rocking sorting plate is complicated. Therefore, in detecting the flow state of the grains on the rocking sorting plate, a detecting device is arranged above the plate surface of the rocking sorting plate by a predetermined height to detect the grains passing between the light emitting element and the light receiving element. There is also a method of detecting the grain layer thickness by detecting it, but in that case, when the upper end of the grain layer thickness is located between the light emitting element and the light receiving element, the detection state that the grain has passed and the grain There is a problem in that the non-detection state of not passing is alternately repeated, and the detection criterion of the layer thickness becomes complicated. Therefore, the present invention eliminates such a defect by arranging a grain detection plate having a special configuration in a detection device constituted by a light emitting element and a light receiving element, and easily detects the grain layer thickness. It is intended to be realized.

[0004]

The present invention has taken the following technical means in order to solve the problems of the prior art. That is, according to the present invention, the uneven surface for sorting is formed on the upper surface of the sorting plate, and the sorting side is higher on one side in the vertical direction.
The other side is the lower discharge side 16, the one side in the horizontal direction that is orthogonal to the vertical direction is the rocking upper side 16, and the lower side on the opposite side is the rocking side 16 In the grain layer thickness detection device, the grain detection plate 39 that moves up and down by contacting the upper surface of the grain layer flowing on the swing selection plate 16 moves up and down integrally with the grain detection plate 39. The grain layer thickness detecting device of the rocking and sorting device is characterized in that it has a detector 40 that moves between the light emitting element and the light receiving element of the layer thickness detecting sensor 35 when moving upward.

[0005]

First, the structure of the embodiment shown in FIGS. 1 and 3 will be described. This hulling / sorting machine is a hulling part A for hulling, a downland rice wind selection part B for wind-selecting the downland rice from the hulling part A,
It is composed of a mixed rice sorting section C for sorting the mixed rice after the wind sorting in the sliding rice wind sorting section B and a fried grain transporting section D for transporting the grain into the grain, and the hulling section A in front of the machine body. At the upper part, the sliding rice wind selecting section B is arranged at the lower front part, and the suction fan 1 of the sliding rice wind selecting section B is arranged at the front of the hulling section A, and the hulling section A and the falling rice are arranged. The mixed-rice fried machine 2 of the fried-grain conveying section D is arranged on one side of the wind-selection section B, the mixed-rice sorting section C is arranged at the rear, and the mixed-rice sorting section C is arranged behind the mixed-rice sorting section C. This is a configuration in which the brown rice fried machine 3 of the transport section D is arranged.

The hulling section A includes a hull hopper 4, hulling rolls 5,
5. The hulling chamber 6 is equipped with a diffusing plate. Next, the slide-down rice wind selection section B will be described. A slide-down rice wind selection path 8 is provided in the slide-down rice wind selection box body 7,
Sliding rice flows down from the upper hulling chamber 6, and the sliding rice wind selection path 8
The sliding rice is fed to the rear side of the sorting start end, and the falling rice is wind-selected by the slanted-down-rice selecting passage 8 which is inclined at a higher position toward the end side.
Below the start end side of this slide-down rice wind selection path 8, a slide-down rice gutter 9 for receiving the selected slide-down rice is provided, and below the end side thereof, a paddy-rice receiving gutter for receiving the pomegranate rice. 10 are provided. The sorting wind that has flowed through the slide-down rice wind selection passage 8 from the start end side to the end side is discharged to the outside of the machine through the suction dust collector 1 and the dust discharge tube 11. The crushed rice dropped and selected on the crushed rice receiving gutter 10 is fried and returned to the paddy hopper 4 by the crushed rice lifting machine 12, and the fallen rice selected and dropped on the scraped rice receiving gutter 9 is removed by sliding. US spiral 13
Is conveyed to one side and flows into the lower part of the mixed rice fried machine 2,
It is fried by the mixed rice fried machine 2 and supplied to the mixed rice hopper 14 of the mixed rice sorting section C.

Next, the mixed rice sorting section C constituted by the swing sorting device 15 will be described. Multi-stage swing selection plate 1
6, 16, ... As a configuration in which both the vertical direction (direction orthogonal to the paper surface of FIG. 1) which is the flow-down direction of the grain and the horizontal direction which is the sorting direction orthogonal to the vertical direction are inclined, the horizontal direction is It is arranged at the rear part of the machine body along the front-rear direction of the machine body (the left-right direction in FIG. 1), and has a configuration in which a swing arm (not shown) reciprocates obliquely vertically. The mixed rice fried in the mixed rice hopper 14 passes through the distribution gutter 17 and the distribution case 18, and is on the high vertical supply side of the rocking sorting plates 16, 16, ... And on the low horizontal horizontal rocking side. Is supplied to the swing selection plates 16, 16, ...

A brown rice partition plate 19 and a paddy partition plate 20 are provided on the vertical discharge side of the rocking sorting plates 16, 16 ,. The grains distributed in the brown rice distribution basin, the mixed rice distribution basin in the lateral middle part, and the paddy distribution basin on the lateral shaking side are brown rice, mixed rice and paddy at the brown rice partition plate 19 and the paddy partition plate 20, respectively. The structure is divided into. The brown rice thus partitioned flows down to the brown rice removing section 21, flows through the brown rice flow path 22 and flows into the lower portion of the brown rice fried machine 3 in the fried rice transport section D at the rear, and the brown rice fried machine 3 lifts the grain. And is taken out of the machine from the rear part of the machine.
In addition, the mixed rice separated by the brown rice partition plate 19 and the paddy partition plate 20 is mixed rice after passing through the mixed rice removing section 23, the mixed rice flow path 24, and the slide rice transfer spiral 13 of the slide rice receiving gutter 9. The mixed rice hopper 14 and the distribution gutter 1 flow into the lower part of the fried machine 2 and are fried.
7. After passing through the distribution case 18, the swing selection plates 16, 16, ...
It is supplied to and re-sorted. In addition, the paddy separated by the paddy partition plate 20 flows from the paddy take-out section 26 through the paddy flow path 27 into the paddy fried grain machine 28, is fried by the paddy fried grain machine 28, and is returned to the paddy hull portion A. The structure is such that hulling is performed again.

Further, as shown in FIG. 4, a brown rice switching valve 29 is provided in the brown rice flow passage 22 so that the brown rice which has flowed down can be removed from the brown rice flow passage 2.
It goes out of the machine after flowing through 2 to the brown rice fried machine 3,
Alternatively, the configuration is such that it can be switched to the in-machine circulation state in which it flows through the adjacent mixed rice flow path 24. Also, the mixed rice channel 24
Is provided with a mixed rice switching valve 30 so that the mixed rice that has flowed down flows through the mixed rice flow path 24 to the rocking sorting device 15 that flows to the mixed rice fried machine 2 or the adjacent rice flow path. 27
It is possible to switch to the state of returning to the hulled portion 1 that flows to.

The mixed rice hopper 14 is provided with a mixed rice sensor 31 capable of detecting a predetermined amount of grains, and at the outlet of the mixed rice hopper 14, the opening and closing can be adjusted by a mixing valve adjusting motor 32, and A mixed rice control valve 34 that can detect the opening degree by the valve opening sensor 33 is provided. The brown rice partition plate 19
A partition plate movement adjusting device 44 that can be rotated normally or reversely by the partition plate adjusting motor 43 is used to laterally rock the upper side 16c and the lower side 1
With the configuration that can be moved and adjusted to 6d, the brown rice partition plate 19 moves to the shaking upper side 16c end and stops when it reaches the shaking upper side magnetic sensor 45, and the brown rice partition plate 19 moves to the shaking lower side 16d end and swings down. When the side magnet sensor 46 is reached, it stops, and the reference position magnet sensor 47 can detect that the brown rice partition plate 19 has reached the work standard position.

Next, based on FIG. 5 to FIG. 6, on the vertical discharge side 16b of the swing selection plate 16 and on the swing side 1
Bed thickness detection sensors 35, 35 for detecting the fluidized bed thickness are provided on 6c and on the rocking side 16d. The layer thickness detection sensors 35, 35 will be specifically described. Swing selection plate 16
Between the side wall 36 of the upside 16c and the side wall 37 of the downside 16d on the vertical discharge side 16b in the vertical direction.
The layer thickness detecting sensors 35, 35 are attached to the swinging side 16c and the swinging side 16d of the support plate 38, and the layer thickness detecting sensors 35, 35 are mounted with light emitting elements in the lateral direction of FIG. And an optical detection device composed of a light receiving element, and at the end of the supply side 16a of the support plate 38,
The end portions of the grain detection plates 39, 39 are vertically rotatably supported, and the detection units 40, 40 protruding upward are attached to the grain detection plates 39, 39. When the grain layer flowing above has a predetermined thickness and the grain detection plate 39 in contact with the upper surface moves upward, the detection bodies 40, 40 also move upward, and the layer thickness detection sensors 35, 35 emit light. It is located between the element and the light receiving element and has a configuration capable of detecting that the grain layer thickness has reached a predetermined layer thickness. As shown in FIGS. 7 (1) and 7 (2), in the configuration in which a detection body (not shown) is provided in the lateral direction intermediate portion of the grain detection plate 39, the upper side 16c of the grain detection plate 39 is increased. If the standing plates 41, 41 are provided at the end and / or the end of the swaying side 16d, the grain detection plate 39 can be prevented from sinking into the grain, and the grain layer thickness can be accurately detected. Becomes Further, as shown in FIG. 7C, the support plate 38
The grain detection plate 39 is vertically rotatably supported by the support plate 38.
A light emitting element and a light receiving element are respectively arranged on the lower surface of the grain detecting plate 39 and the upper surface of the grain detecting plate 39, and the grain detecting plate 39 is pushed up by the grain layer thickness and moves upward, so that the light emitting element and the light receiving element. It is good also as a structure which detects the predetermined layer thickness of a grain by matching and. If the grain detection plate 39 is of a boat type as shown in FIG. 8, it is possible to prevent the grain detection plate 39 from sinking into the grain and accurately detect it.

With such a configuration, the one for directly detecting whether or not there is a flowing grain between the light emitting element and the light receiving element of the layer thickness detecting sensors 35, 35 is shown in FIG.
When the upper end of the grain layer is between the light emitting element and the light receiving element as shown in (1), as shown in FIG. 6 (2), the detection state in which the grain has passed and the non-passage state There is a problem in that the detection waveform becomes a detection waveform in which the detection states are alternately repeated, and the determination criterion for the presence or absence of the grain layer thickness becomes complicated. However, since it is configured as described above, the detection body 40 that moves up and down together with the grain detection plate 39 that is in contact with the flowing grain upper surface is the layer thickness detection sensor 35 including the light emitting element and the light receiving element. Since the detection is performed, the lower surface of the grain detection plate 39 moves up and down while the upper surface of the flowing grain is leveled, which prevents repetition of ON / OFF detection and simplifies the determination criterion for detection. The drawbacks of can be solved.

Limit switch capable of detecting that the layer thickness detecting sensors 35, 35 brown rice switching valve 29 has reached the switching end position. Limit switch capable of detecting that the mixed rice switching valve 30 has reached the switching end position. The detection information from the magnet sensor 45, the swaying side magnet sensor 46, and the reference position magnet sensor 47 is transferred to the CPU including the control unit, the arithmetic unit, and the register unit, the program memory, and the arithmetic memory via the input interface. It is configured to be input to an arithmetic control unit (not shown) composed of a memory unit, and the mixed rice valve adjusting motor 32, brown rice switching valve switching means 48, via the output interface from the arithmetic control unit, A control command signal is output to the mixed rice switching valve switching means 49, and the layer thickness detecting sensor 35 of the rocking side 16c, Based on the detection result of the layer thickness detection sensor 35 on the lower side 16d, the opening / closing adjustment of the mixed rice control valve 34, the switching adjustment of the brown rice switching valve 29, the switching adjustment of the mixed rice switching valve 30, or the lateral inclination of the rocking sorting plate 16 is performed. Adjust the angle, etc.

Further, when the sorting operation is started by the rocking sorting plate 16, the mixed rice control valve 34 is opened from the beginning of the work, and the mixed rice is supplied to the swing sorting plate 16 from the beginning to start the sorting operation quickly. The brown rice switching valve 29 is switched to the in-machine circulation side, and the mixed rice switching valve 30 is switched to the returning side to the hull portion A, so that the sorting by the swing sorting plate 16 is stable,
By the automatic adjustment or the manual adjustment, the brown rice partition plate 19 is sequentially moved from the lateral shaking upper side 16c to the shaking lower side 16d,
When the position of the reference position magnet sensor 47 is reached and the detection information of the reference position magnet sensor 47 is sent to the arithmetic control unit (not shown), the arithmetic control unit switches the brown rice switching valve switching means 48 and the mixed rice switching valve switching means 49. A control command signal is output to, and the brown rice switching valve 29 is switched to the take-out side of the machine, the brown rice is taken out of the machine through the brown-rice fried machine 3, and the mixed rice switching valve 30 is switched to the circulation side. Then, the mixed rice is circulated to the rocking and sorting device 15 through the mixed rice fried machine 2 and re-sorted.

Next, FIG. 9 will be described. On the vertical discharge side 16b of the swing selection plate 16, the swing side 16c
When connecting the support plate 38 to the side wall 36 of the rocking side 16d and the side wall 37 of the rocking side 16d, and detecting the grain layer thickness of the brown rice distribution basin of the rocking upper side 16c and the paddy distribution basin of the rocking side 16d of this support plate 38 , Bed thickness detection sensors 35, 35 for detecting the fluidized bed thickness
Is attached so as to face above the surface of the selection plate from above. A piezoelectric type detection device is provided on the detection surface which is the lower surface of the layer thickness detection sensors 35, 35, and the upper side 16c of the swing side and the lower side 16d of the swing side are arranged on the lower side of the detection surface 35a. The detection surface is inclined so that the supply side 16a is inclined to the upper side and the discharge side 16b is positioned to the lower side, and when the swing selection plate 16 reciprocates diagonally up and down in the lateral direction, the upper side 16c is shaken. The grain moved to the rocking upper side 16c side by the forward movement to the contact with the detection surface 35a when moving to the rocking side 16d during the backward movement, and from the supply side 16a to the discharge side 16
The grain detection is ensured as a configuration in which the flow grain to b comes into contact with the detection surface to detect the grain pressure and to detect the presence or absence of the grain.

Next, FIG. 10 will be described. On the vertical discharge side of the oscillating sorting plate 16, the brown rice partition plate adjusting motor 43 is rotated normally or reversely by automatic control or manual operation to drive the brown rice partition plate movement adjusting device 44 to drive the brown rice partition plate. 19 is configured so that it can be moved and adjusted to the upper side 16c and the lower side 16d in the lateral direction, and similarly, the paddy partition plate adjusting motor 50 is rotated in the normal or reverse direction to move the paddy partition plate movement adjusting device 5
1 is driven to move and adjust the paddy partition plate 20 to the upside 16c and the downside 16d in the lateral direction. Also,
The layer thickness detection sensors 35, 35, ... Are arranged in the brown rice distribution region, the mixed rice distribution region, and the paddy distribution region to detect the grain layer thickness of each of them. Reference numerals 52 and 52 are lateral position detectors capable of detecting the lateral movement positions of the brown rice partition plate 19 and the paddy partition plate 20. Further, the gap between the hulling rolls 5 and 5 of the hulling portion A is obtained by rotating the hulling roll gap adjusting motor (not shown) in the forward and reverse directions so that the hulling roll gap adjusting means (shown in the figure). Opening and closing can be adjusted via (omitted).

The layer thickness detecting sensors 35, 35, ...
The lateral position detector 52 is connected to an arithmetic control unit (not shown) via an input interface, and the hulling roll gap adjusting mode is transmitted from the arithmetic control unit via the output interface. (Not shown), paddy partition plate adjusting motor 50,
A control command signal is output to the brown rice partition plate adjusting motor 43.

The control contents of the arithmetic control unit will be described.
When the detection information of the layer thickness detection sensors 35, 35, ... And the lateral position detector 52 is input to the arithmetic control unit, the distance l1 between the side wall 36 of the rocking side 16c and the brown rice partition plate 19, the brown rice partition plate 1
9, the space 12 between the paddy partition plate 20 and the side wall 3 of the rocking side 16d
From the interval l3 between 7 and the paddy partition plate 20 and the layer thickness of each non-uniform distribution basin, the removal rate is calculated as "l1 + l2α (constant near 0.5 indicating the brown rice ratio)" / "l1 + l2 + l3" Is calculated, and the calculated removal rate is compared with the set removal rate, and when the calculated removal rate is large or small, the arithmetic control unit causes the hulling roll gap adjusting motor (not shown). ), A control command signal for opening or closing the gap is issued, and the removal rate is adjusted. The sorting efficiency of the rocking sorting plate 16 is calculated from the length of l1 and the layer thickness, and compared with the standard reference efficiency. When the sorting efficiency is low, the gap between the hulling rolls 5 and 5 is closed and adjusted. When the selection efficiency is high, the gap between the hulling rolls 5 and 5 may be adjusted to open.

Next, the operation of the embodiment shown in FIGS. 1 to 4 will be described. In the case of hulling work, the raw hull is supplied to the hull hopper 4 of the hulling section A, and a power switch (not shown)
Also, the operation switch (not shown) is turned on to drive the rotating parts of the paddy hull sorting machine. Then, from the paddy hopper 4 to the paddy section A
The paddy supplied to the hulling rolls 5 and 5 is hulled, and the hulled / brown rice and the hulled rice of the hull fall into the sludge-rice wind selection channel 8 to be wind-selected, and the light hull is a suction dust collector 1, the mixed rice of heavy brown rice and paddy that has been discharged to the outside of the machine through the dust collector 11 is the slide-down rice receiving gutter 9, the mixed rice fried machine 2, the mixed rice hopper 14, the distribution gutter 17 and the distribution case 18. After that, it is supplied to the swing selection plates 16, 16.

When the oscillating sorting plates 16, 16 ... Oscillate horizontally obliquely up and down, the mixed rice has a large grain size, a large specific gravity, and a large friction coefficient. Unevenly distributed on the lateral rocking upper side 16c, and the paddy having a larger specific gravity than brown rice is unevenly distributed on the lateral rocking side 16d, and the mixed rice of unhulled rice and brown rice is not separated in the middle part. Uneven distribution. The vertical discharge side 16b of the rocking sorting plates 16, 16, ... Is partitioned by the brown rice partition plate 19 and the paddy partition plate 20, so that the brown rice passes through the brown rice removing section 21 and the brown rice flow path 22 and also the mixed rice. Is passed through the mixed rice removing section 23 and the mixed rice flow path 24, and the paddy is passed through the paddy removing section 26 and the paddy flow path 27 to be taken out and sorted.

The hulling / sorting operation is performed in this manner. The distribution state of the grains changed depending on the quantity, quality, moisture content, etc. of the grains supplied to the swing sorting plate 16 is determined by the swing sorting. The layer thickness is detected by the layer thickness detection sensors 35, 35 provided on the vertical discharge side 16b side of the plate 16 and on the rocking side 16c and the rocking side 16d, and the rocking sorting device 1
5 various regulatory controls are provided.

[0022]

According to the present invention, the grain detection plate 39 which moves up and down by contacting the upper surface of the grain layer flowing on the swinging selection plate 16 moves up and down integrally with the grain detection plate 39. Since the detector 40 that moves between the light-emitting element and the light-receiving element of the layer thickness detection sensor 35 when moving upward is used, the grain detection plate 39 that is in contact with the upper surface of the flowing grain is in motion. The upper surface of the grain layer is leveled, the movement of the detection body 40 that moves up and down together with the grain detection plate 39 is stable, and the presence or absence of the detection body 40 can be detected by the layer thickness detection sensor 35 including a light emitting element and a light receiving element. In the case where a grain that flows stably between the light emitting element and the light receiving element of the layer thickness detection sensor 35 is directly introduced and detected, the upper end of the grain layer is located between the light emitting element and the light receiving element. , The detection state where the grain passes and the non-detection state where the grain does not pass are alternated. It becomes detected waveform repeated,
It is also possible to solve the problem that the criterion for determining the presence or absence of the grain layer thickness becomes complicated.

[Brief description of drawings]

[Figure 1] Whole cut side view

[Figure 2] Front view

FIG. 3 is a plan view.

FIG. 4 is a cut side view.

FIG. 5 is a perspective view, a cutaway front view and a graph.

FIG. 6 is a cutting front view and a graph.

FIG. 7 is a perspective view

FIG. 8 is a perspective view and a side view.

FIG. 9 is a cut side view, a plan view, and a front view.

FIG. 10 is a front view, a plan view and a flowchart.

[Explanation of symbols]

 A Rice hulling part B Sliding rice wind sorting part C Swing sorting device D Lifting grain transporting part 1 Suction dust remover 2 Mixed rice grain lifting machine 3 Brown rice grain lifting machine 4 Paddy hopper 5 Paddy roll 6 Paddy room 7 Sliding rice style selection box 8 Sliding rice style selection route 9 Sliding rice receiving gutter 10 Polished rice receiving gutter 11 Dust collecting cylinder 12 Polished rice lifting machine 13 Sliding rice spiral 14 Mixed rice rice hopper 15 Swing sorting Device 16 Swing sorting plate 17 Distribution 18 Distribution case 19 Brown rice partition plate 20 Paddy partition plate 21 Brown rice extraction part 22 Brown rice flow path 23 Mixed rice extraction part 24 Mixed rice flow path 26 Paddy extraction part 27 Paddy flow path 28 Paddy grain mill 29 Brown rice switching valve 30 Mixed rice switching valve 31 Mixed rice sensor 32 Mixed rice valve control motor 33 Valve opening sensor 34 Mixed rice control valve 35 Layer thickness detection sensor 36 Side wall 37 Side wall 38 Support plate 39 Grain detection plate 40 Detector 41 Standing plate 43 Partition plate adjusting motor 44 Partition plate transfer Dynamic adjustment device 45 Swing upper side magnet sensor 46 Swing side magnet sensor 47 Reference position magnet sensor 48 Brown rice switching valve switching means 49 Mixed rice switching valve switching means 50 Paddy partition inspection plate adjusting motor 51 Paddy partition plate moving adjusting device 52 Horizontal position detection vessel

Claims (1)

[Claims] 1. An uneven surface for sorting is formed on the upper surface of the sorting plate, and one side in the vertical direction is a high supply side 16 and the other side is a low discharge side 16 in a horizontal direction orthogonal to the vertical direction. A grain layer thickness detecting device for a rocking sorting plate 16 in which one of the high side is a rocking side 16 and the opposite side is a rocking side 16, and the grain layer top surface flowing on the rocking sorting plate 16 The grain detection plate 39 that moves up and down in contact with the
A grain layer thickness detecting device of a rocking sorting device, comprising a detector 40 that moves up and down integrally with the light emitting element and the light receiving element of the layer thickness detecting sensor 35 when moving upward.