JPS63117204A - Roll gap detector - Google Patents

Abstract

PURPOSE:To accurately detect the gap between rolls without being affected by the thermal expansion or deformation of the rolls, by allowing the irradiation light from a floodlight projector to pass through the gap between the rolls toward a quantity-of-light detector. CONSTITUTION:The light other than reflected light of the parallel light allowed to irradiate the gap 27 between rolls 21, 22 from a floodlight projector 23 straightly advances through the roll gap to pass therethrough. This passing light is increased and decreased by the size of the gap 27 to enter the light receiver 30 of a quantity-of-light detector 29. A slit 31 is provided to the light receiver 30 and the light passing through said slit 31 enters a light receiving element 34. The element 34 converts the light incident by an element such as a phototransistor to the electric signal corresponding to the incident light to outputs said signal. The analogue electric signal issued from the element 34 is amplified by an amplifier 32 as it is or converted to a digital signal by an A/D converter to be displayed on a display device 33.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a roll gap detection device for detecting a gap between a pair of rolls arranged close to each other in parallel.

(Prior art) A roll gap detection device applied to a conventional single facer is explained with reference to Fig. 6. (1) is the upper roll, (2) is the lower roll, and (3) is the lowest pressure roll. , the respective rolls (1), (2), and (3) are arranged close to each other in parallel. Also, (4) is 8 yen, (5) is liner paper, (6) (7) is pressurizing device, (8) is lever, (9
) is a stopper, the upper roll (1) is pressed in the direction of the lower roll (2) by the pressure device (6), and the 8 yen (4) supplied via the upper roll (1) is pressed against each roll (
1) When passing between (2), it is formed into a wave shape, and then glued by a device (not shown) to the crest of the wave of the paper (4), and then pasted onto the pressure roll of the lower roll (2). (3) is sent between. At this time, the pressure roll (3) is also pressed in the direction of the lower roll (2) by the pressure device (6), and the liner paper (5) fed through the pressure roll (3) is glued. The crest of the 8 paper (4) is glued to the wave crest of the 8 paper (4), and after the glued 8 paper (4) and the liner paper (5) leave between the lower roll (2) and the pressure roll (3), It is now sent to the process. Between this lower roll (2) and pressure roll (3), 8 sheets of paper (4) and liner paper (
In order to properly bond the liner paper (5) and reduce vibration, there is a gear A/tube that is slightly smaller than the sum of the paper thicknesses of the liner paper (5) and the paper thickness of the liner paper (5). In order to set and adjust the roll gap, a lever (8) is provided on the pressure device (7), and a stopper (9) is provided to restrict the movement of the lever (8).
) is provided.

The roll gap between the lower roll (2) and the pressure roll (3) needs to be maintained properly in order to improve manufacturing quality. Although it is necessary to adjust according to the operating speed, etc., conventionally, one of the bearing frames supporting the lower roll (2) and the bearing frame supporting the pressure roll (3) A displacement meter was attached to the roller to detect the amount of displacement of the mating bearing frame, and this detected amount was converted to the amount of roll gap and displayed on the operation panel.

(Problems to be Solved by the Invention) Steam at about 200'C is introduced into the lower roll (2) and pressure roll (3), so as time passes from the start of steam introduction, The lower roll (2), the pressure roll (3), and the bearing frame supporting the rolls undergo thermal expansion, which causes an error in the amount detected by the displacement meter. In addition, even when the roll gap detection device using the above displacement meter is applied to a roll part other than a single facer, if there is play in the bearing part or the roll is deformed, this will affect the roll gap. This causes a problem that accurate detection is not possible.

(Means for Solving the Problems) The present invention addresses the above-mentioned problems, and provides a roll gap detection device for detecting a gap between a pair of rolls arranged close to each other in parallel. It is characterized by comprising a light projector that irradiates light onto the rolls, and a light amount detector that detects the amount of light that has passed between the rolls.

An object of the present invention is to provide an improved roll gap detection device that can accurately detect the gap between rolls without being affected by thermal expansion of the rolls or bearings, play of the bearings, deformation of the rolls, etc. It is in the point of providing.

(Function) The roll gap detection device of the present invention is configured as described above, and emits parallel light from a projector toward between a pair of rolls, and removes light other than the reflected light that hits the roll surface and reflects the same. The light passes through the roll gap between the rolls toward the light amount detector. This passing light increases or decreases depending on the size of the roll gap and enters the optical M detector, where the amount of the passing light is detected, and the resulting detected value is converted to the roll gap and displayed on a display, etc. do.

(Example) Next, the roll gap detection device of the present invention will be explained using an example shown in FIG. and are arranged in parallel. In addition, (23) is a floodlight, and inside the floodlight (23) is a semiconductor laser light source (24).
and a light projecting lens (25), and after the light exiting the semiconductor laser light source (24) passes through the light projecting lens (25) and becomes parallel light (26), it passes through the roll (21) (22 ) is irradiated to the gap (27) between them. Also, (28) is the gap between rolls (21) and (22) (
27), (29) is the light amount detector,
(30) is the light receiver, (31) is the sleeve I- provided on the light receiver (30), (34) is the light receiving element provided behind the light receiver (30), (32) is the amplifier, (33) ) is the indicator.

Next, the operation of the roll gap detection device shown in FIG. 1 will be explained in detail. From the floodlight (23) to the roll (21
) (22) Among the parallel light (26) irradiated between the rolls (21) and (22), the light other than the reflected light that is reflected by hitting the rolls (21) and (22) passes straight through the roll gap (27). This passing light (28) increases or decreases depending on the size of the roll gap (27) and enters the light receiver (30) of the light amount detector (29).

This light receiver (30) has a slit (31), and the light that passes through the slit (31) enters the light receiving element (34).

The light receiving element (34) has a photoelectric conversion function of converting incident light into a corresponding electrical signal, for example, a voltage signal, by an element such as a phototransistor or a photodiode, and outputting the electrical signal. Further, the analog electrical signal output from the light receiving element (34) enters the amplifier (32), where it is amplified as it is, or converted to a digital signal by an A/D converter and then sent to one display (33). is sent to and displayed as 1.

Figure 2 also shows parallel light (26) from the floodlight (23).
Roll gap (27) of roll (21) (22)
In another embodiment, the irradiation is parallel to the axis of the roll.

The same actions as described above take place.

Also, Fig. 3 shows an inclined light receiver (30) that receives the light that has passed through the roll gap (27) of the rolls (21) (22).
This is another embodiment in which it is received by an inclined slit (31). In this embodiment, the slit (31) of the light receiver (30) is inclined for the following reason. That is, FIGS. 4 and 5 show the positional relationship between the roll gap (27) and the slit (31). Figure 4 is.

The case where the slit (31) is perpendicular to the roll gap (27) is shown, and FIG. 5 shows the case where the slit (31) is oblique to the roll gap (27). .When the slit (31) is perpendicular to the roll gap (27) as shown in FIG.

Roll gap (27) (, roll (21) (22
) and the opposing roll line (gHf).The amount of light passing through the gap formed between the roll line (g) and the opposing roll line (gHf) becomes the part surrounded by +
When moving by (1) in the g') direction, the increase in one passing light becomes C, -C+'DI' DI. However, as shown in Figure 5, the slip (31) is the roll gap (2
7), the amount of light passing through the roll gap (27) (the gap formed between the opposing roll lines (g) and (f) of rolls (21) and (22)) is The area is surrounded by A2-B2-D2-C2, and the roll line (g) moves in the (g)-"(g') direction (N
).

The increase in passing light is C+ C+"-D,'-D,
Ct Cz '-D z '-D
It becomes a diamond shape of 2, and is 1/sin θ times more than C, -C,'-D, °-Dl. That is, C2C2'
D2° Dz=C+ -C+'D+'-DI /
becomes sin θ. Konokotoha.

The sensitivity of the light amount detector (29), that is, the 3 resolution is l/sin
In the case of Fig. 5, this means an improvement of θ times.

Highly accurate detection becomes possible.

(Effects of the Invention) As described above, the roll gap detection device of the present invention irradiates parallel light from the projector toward the gap between the pair of rolls, and removes light other than the reflected light that hits the roll surface and reflects the gap between the rolls. The light passes through the roll gap toward the light amount detector. This passing light.

The amount of light increases or decreases depending on the size of the roll gap, enters the light intensity detector, detects the amount of light passing through here, and converts the detected value obtained as a result to the roll gap and displays it on the 3 display, etc. This has the effect of accurately detecting the roll gap without being affected by thermal expansion of the rolls or bearings, play in the bearings, deformation of the rolls, etc.

[Brief explanation of the drawing]

FIG. 1 is a system diagram showing one embodiment of the roll gap detection device according to the present invention, FIG. 2 is a front view showing another embodiment, and FIG. 3 is a front view showing still another embodiment. Figure 4.5 is an explanatory diagram explaining why the detection accuracy is improved by the roll gap detection device shown in Figure 3, and Figure 6 is a side view showing each roll of the single facer to which the present invention is applied. It is. (21) (22)...roll, (23)...
・Floodlight, (27)... Roll gap, (29
)...Light level detector. Sub-Agent Patent Attorney Shigemon Okamoto (2 people) Figure 3

Claims (1)

[Claims] In a roll gap detection device that detects a gap between a pair of rolls arranged close to each other in parallel, a light projector that irradiates light between each roll, and a light amount that detects the amount of light that passes between each roll. A roll gap detection device comprising: a detector.