JPH11281330A - Method for measuring irregularity of rail track and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of the error of measurement even when a laser beam is weak at the time of measuring the irregularity of a track by using the laser beam. SOLUTION: The top surface of a rail 3 is irradiated α with a laser beam, one part of a reflected light diffuse-reflected from the rail is received, and the relative position in the right and left direction of the rail 3 is measured from the changing amounts of the relative position of a received light beam βso that the irregularity of a track can be measured. At the time of the irradiation of the laser beam, the laser beam is bent so that the side part of the rail can be irradiated with the laser beam, and the face including the irradiating light and the received light beam makes a right angle in the longitudinal direction of the rail.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of irradiating a rail with a laser beam, receiving a part of the light diffusely reflected from the rail, and measuring the relative position of the received light-receiving line to the right and left of the rail. The present invention relates to a method and apparatus for measuring an orbital deviation including a method for measuring a relative position between a direction and a vertical direction.

[0002]

2. Description of the Related Art Conventionally, track irregularity has been measured by using a sliding device, a measuring wheel, or a laser displacement meter on each of three trucks, that is, a front truck, a middle truck, and a rear truck attached to a vehicle having a vehicle body having sufficient rigidity. By mechanically or optically measuring the relative position of the rail in the horizontal direction or the vertical direction, or in addition to measuring the relative position of the rail in the horizontal direction or the vertical direction, and determining the displacement of the device with respect to the inertial space. It is done by that.

[0003] In the former method, three measuring devices are installed on a carriage at intervals of several meters in a running vehicle (hereinafter, referred to as a "traveling vehicle"), and the strings formed by the measuring devices at both ends are basically used. This is a method of measuring a track deviation by measuring the relative position of the rail and the measuring device in the left-right direction or the up-down direction with a measuring device installed in the middle.

In the latter method, in a traveling vehicle, the acceleration of the lateral movement of a relative position measuring device for measuring the relative position of the rail and the wheel in the lateral direction is measured, and the amount of change in the acceleration is integrated twice. As a result, since the position of the device in the inertial space is obtained, in the left-right direction, first, the relative position of the rail and the traveling wheel in the left-right direction is continuously measured, and the displacement of the measured relative position in the left-right direction is calculated. In the vertical direction, the relative position of the rail and the traveling wheel in the vertical direction is continuously measured by adding the integral value of the acceleration of the horizontal movement twice, and the displacement of the measured vertical position is calculated. The acceleration of the vertical motion 2
This is a method of measuring the orbital deviation by adding the integral value.

The measurement of the relative position of the rail in the left-right direction or the up-down direction, which is a part of the measurement of the track deviation, is performed mechanically or optically. By the measuring wheel, by the running wheel in the up-down direction, in the left-right direction, by irradiating a strong laser beam in the longitudinal direction of the rail through the slit from diagonally above the rail within the vehicle limit and reflected from the irradiation point on the rail The reflected light is received through the slit, and the laser beam is guided to the predetermined position on the side of the rail by the prism from the amount of change in the relative position of the light receiving line received at the predetermined position, and irradiated in the longitudinal direction, and the relative position Is measured as the amount of change in the position in the longitudinal direction.

[0006]

However, a device that emits a powerful laser beam is very expensive, and when a vehicle is irradiated with a laser beam in the longitudinal direction of a rail and measured,
There is a problem that a measurement error occurs. Another problem is how to keep the laser beam irradiation at a predetermined position (side surface 14 mm below the top of the rail) with a light and inexpensive device, and how to protect the curved surface of the laser beam in the atmosphere containing wind, rain and dust. It is.
Furthermore, even if the measuring device collides with an object on the ground, it is an important issue how to prevent the traveling of the vehicle from being hindered.

[0007]

SUMMARY OF THE INVENTION According to the present invention, when measuring orbit deviation using a laser beam, even if the laser beam is weak with an inexpensive device, the above measurement error can be generated. In addition to preventing the measurement of the vehicle, the transmission and reception of the laser beam is ensured by maintaining the transparency of the curved surface of the laser beam. The purpose is to avoid any trouble in running.

In order to achieve such an object, the present invention provides:
Irradiate the laser beam to a predetermined position on the side of the head of the rail,
A method of receiving a part of the reflected light diffusely reflected from the rail, and a method of measuring a track deviation including a method of measuring a relative position in the left-right direction of the rail from a variation in a relative position of the received light receiving line, The laser beam is irradiated by bending the laser beam and irradiating the laser beam from the side of the rail, and the surface including the irradiation light and the light receiving line is perpendicular to the longitudinal direction of the rail.

Further, the present invention provides a method of irradiating a laser beam onto a top surface of a rail, receiving a part of the reflected light diffusely reflected from the rail, and measuring the relative position of the received light receiving line based on a change in relative position of the received light. In a method of measuring a track deviation including a method of measuring a relative position in a vertical direction, a surface including the irradiation light and the light receiving line is perpendicular to a longitudinal direction of the rail.

As described above, according to the present invention, since the surface including the irradiation light and the light receiving line is perpendicular to the longitudinal direction of the rail and the projection light receiving distance of the laser light is short, the laser light Even if it is weak, it is possible to prevent a measurement error from occurring as much as possible.

Further, according to the present invention, in the case of a measuring method including a method of measuring a relative position of a rail in the left-right direction, a laser beam is bent and directly radiated to a predetermined position from the side of the rail. Even if the bent part is located below the top of the rail, the bent part is placed within the width of the flange of the wheel, so that it is installed below the top of the rail while the vehicle is running. It is possible to prevent the provided member from contacting the rail or the derailment prevention rail disposed inside and outside the rail. That is, if the laser beam is irradiated directly from the side of the rail without bending the laser beam, it is difficult to form a laser beam emitting device or the like so as to fit within the flange width of the wheel. If a prism or a mirror that bends light is used, it can be formed so as to fit within the flange width of the wheel, so that the part that bends the laser light is located below the top surface of the rail. Can be installed. In this way, the laser beam can be bent at a position lower than the top surface of the rail and at a position close to the rail and perpendicular to the longitudinal direction. Can be measured with a much weaker laser beam and with a significantly reduced length in the longitudinal direction, as compared with the case where measurement is performed by irradiating the laser beam. Therefore,
Since this can be realized lightly by using an inexpensive commercially available laser displacement meter, the manufacturing cost of the measuring device can be significantly reduced.

A measuring device used in a measuring method including a method of measuring the relative position of the rail in the left-right direction includes a laser beam irradiating section for irradiating a laser beam to a side surface of a head of the rail, and a reflection diffused and reflected from the rail. A relative position in the left and right direction of a rail provided in a housing, including a laser light receiving unit that receives a part of light, and a measuring unit that measures a change in a relative position of a light receiving line received by the laser light receiving unit. In a device for measuring track deviation including a left-right relative position measuring device for measuring a distance, the housing is formed in a sealed state, and the laser light irradiation section bends a laser light disposed on a side of a rail. It has a laser beam bending portion, and the laser beam irradiating portion and the laser beam receiving portion are installed at a position where a surface including the irradiating light and the light receiving line is perpendicular to the longitudinal direction of the rail. The laser beam bent portion is composed of a prism, the prism forms part of the components forming the sealed state of the housing.

As described above, by using the prism as the bending portion and forming the prism as a part of the component forming the housing in a sealed state, it is possible to prevent dust and the like from entering the housing. It is possible to prevent the measurement error from occurring as much as possible due to the influence of the laser light due to the weather and dust.

In order to clean the outer surface of the prism,
It is preferable that an ejection unit that ejects the cleaning liquid is provided on the outer surface of the prism. As a result, the prism surface is cleaned by the cleaning liquid and the traveling wind pressure of the vehicle and is forcibly dried by the traveling wind, so that dust and the like adhering to the outer surface of the prism can be removed, and transmission and reception of light can be performed without any trouble.

The distal end portion having the bent portion is provided with a cut portion in which the wall pressure of the housing is formed thin or a cut groove is formed because the length in the longitudinal direction can be significantly reduced. Is preferred. As a result, the front end is easily cut by impact, so that even if the front end may come into contact with the ground equipment, the ground equipment can be prevented from being damaged, and the traveling safety of the vehicle is ensured. can do. Also, if the distal end is configured to be easily crushed, even if the cut distal end remains on the rail, it is crushed by the subsequent wheel or configured to prevent falling by a string, It does not affect the running of the vehicle.

Further, as an apparatus of a measuring method including a method of measuring a vertical relative position of a rail, a laser light irradiating section for irradiating a laser beam to a top surface of a rail, and a device for reflecting light diffusely reflected from the rail are provided. A laser light receiving unit that receives a part of the light and a measuring unit that measures a change in the relative position of the light receiving line received by the laser light receiving unit measure a vertical relative position of a rail provided in the housing. In a device for measuring an out-of-orbit including a vertical relative position measuring device, the housing is formed in a sealed state, and the laser light irradiating unit and the laser light receiving unit include a surface including the irradiation light and the light receiving line. Is installed at a position perpendicular to the longitudinal direction of the rail, the laser light irradiation unit irradiates irradiation light to the top surface of the rail via a light-transmitting plate disposed above the rail, Translucent plate, a part of components of the housing in a closed state, the injection unit for injecting the liquid is provided on the outer surface of the translucent plate. As the translucent plate, there is a glass plate or the like. By providing an injection unit for injecting a liquid on the outer surface of the translucent plate, the outer surface of the translucent plate is cleaned by the cleaning liquid and the running wind pressure of the vehicle. Since it is forcibly dried, dust and the like adhering to the outer surface of the prism can be removed, and transmission and reception of light can be performed without any trouble.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, as an embodiment of a method and an apparatus for measuring track deviation according to the present invention, in addition to the measurement of the relative position between the rail and the wheel in the left-right direction, the displacement of the wheel with respect to the inertial space is measured. A method and an apparatus for measuring the out-of-orbit by obtaining it will be described. FIG. 1 is a side view showing the relationship between the measuring device of the present embodiment, wheels, and rails, FIG. 2 is a plan view thereof, FIG. 3 is an enlarged side view showing a part of the measuring device cut away, FIG. 4 is an enlarged front view of the measuring device, and FIG.
Is a laser beam path explanatory diagram of the measuring device, FIG. 6 is a block diagram showing a control mechanism in the measuring device, FIG. 7 is a graph showing measurement results obtained by the present measuring method and device, and FIG. It is a front view showing other examples.

The measuring device according to the present embodiment measures the relative position between the rail and the wheel in the horizontal direction, and the acceleration of the lateral movement of the relative position measuring device 1 in the horizontal direction. In the figure, 2 is a wheel, 2a is a flange of the wheel 2, 2b is an axle,
Reference numeral 3 denotes a rail. The left-right relative position measuring device 1 is fixed by a support arm 5 attached to an axle box 4 of the wheel 2, and is installed near the wheel 2. The left-right relative position measuring device 1 has a housing 6 formed in a sealed state, and a laser displacement meter 7 is provided in an upper part of the housing 6. The laser beam emitted from the laser The prism 8 that bends and irradiates the side surface 3 a of the rail 3, and that bends the reflected light diffusely reflected from the side surface 3 a of the rail 3 and emits the reflected light into the housing 6 is a housing 6.
Is provided in the front end portion 6a of the main body.

As shown in FIG. 1, the housing 6 has a tip 6a formed to be thinner than the width of the flange 2a of the wheel 2 when viewed from the traveling direction.
Although it is installed below the top surface 3b of the rail 3, it is configured to fit sufficiently within the width of the flange 2a including the deviation of the wheel on the curved rail. For this reason,
Even when the vehicle is traveling on the curved rail 3, the tip 6 a does not contact the rail 3, and the derailment prevention rail (not shown) installed inside and outside the rail 3. There is no contact.

As shown in FIGS. 1, 3, and 4, around the upper end of the front end 6a of the housing 6, the front end 6a of the housing 6 is easily cut off when it collides with an obstacle on the ground. A cut portion 6b in which the thickness of the housing 6 is reduced is formed.

As shown in FIGS. 1 and 3, a position of the housing 6 facing the top surface of the rail 3 is
A horizontal surface 6c is formed. Thus, by interposing a rectangular parallelepiped piece having a predetermined height between the rail 3 and the horizontal surface 6c of the housing 6, when installing the apparatus, the relative position measuring device 1 in the left-right direction is set to a predetermined position. Height (the height at which the laser beam bent by the prism 8 irradiates the side surface 3a 14 mm below the top surface of the rail 3)
Can be easily positioned.

The laser displacement meter 7 converts the laser light into a prism 8
A laser beam emitting device 9 for irradiating the side surface 3a of the rail 3 via the
A position detecting element 10 for receiving and detecting a light receiving line β which is a part of the reflected light diffusely reflected in the housing 6 through the
It has. As shown in FIG. 5, the position detecting element 10 detects a change in the positions A and B of the light receiving line β according to the distance to the side surface 3 a of the rail 3, and thereby the position of the wheel 2 and the side surface 3 a of the rail 3 are changed. Measure the relative displacement in the left-right direction.
The laser emitting device 9 and the position detecting element 10 in the laser displacement meter 7 are connected to the side surface 3 a of the rail 3 via the prism 8.
The surface including the irradiation light α irradiated on the rail 3 and the light receiving line β received by the position detection element 10 among the reflected light diffusely reflected from the side surface 3 a of the rail 3 is perpendicular to the longitudinal direction of the rail 3 (see FIG. 1 to the left and right directions in FIG. 3).

The prism 8 is provided at the tip 6 b of the housing 6.
And a vertical surface 8a facing the side surface 3a of the rail 3 in parallel with the side surface 3a is located in the opening 11 formed on the rail 3 side of the distal end portion 6a. The peripheral edge of the vertical surface 8 a of the prism 8 forms a part of a component that forms a closed state of the housing 6 by being closely attached to the periphery of the opening 11. As described above, by forming the housing 6 in a sealed state, it is possible to prevent rainwater, dust, and the like from entering the apparatus, and to prevent measurement errors from occurring. Further, for example, when the portion for bending the laser beam is configured by a reflecting mirror and the measuring device is configured in a sealed shape, the housing tip 6b facing the rail side surface 3a in addition to the reflecting mirror.
Although a glass window or the like through which laser light passes is required, if the bent portion is formed by the prism 8, a glass window or the like is not required in the case of a hermetic configuration, so that the structure can be simplified.

As shown in FIGS. 3 and 4, the left-right relative position measuring device 1 includes a cleaning liquid jetting device 12 for jetting a cleaning liquid onto the vertical surface 8a of the prism 8 located at the opening 11.
Is installed. The cleaning liquid spraying device 12 includes a spraying device main body 12a connected to a tank or the like having a liquid feeding device for storing the cleaning liquid, a nozzle 12b for linearly or radially spraying, and a nozzle 1 for discharging the cleaning liquid from the tank.
And a pressure feeding pipe 12c for pressure-feeding the cleaning liquid up to 2b. As a result, dust and the like adhering to the vertical surface 8a of the prism 8 can be removed, and the cleaning liquid is easily dried by the running wind, so that the transmission and reception of the laser light can be realized without any trouble, and the transparency can be always maintained. it can. In this case, the injection device is installed without exceeding the cross section of the device.

An accelerometer 13 for measuring the acceleration of the left-right movement of the vehicle is provided above the left-right relative position measuring device 1. The accelerometer 13 and the laser displacement meter 7 are connected to an arithmetic unit 14 as shown in FIG. The arithmetic unit 14 calculates a value obtained by integrating the lateral acceleration of the vehicle measured by the accelerometer 13 twice, and calculates the relative position of the rail 3 and the wheel 2 in the lateral direction measured by the laser displacement meter 7. By adding to the displacement of the rail, the displacement of the rail with respect to the inertial space, that is, the track deviation is measured.

Next, the operation of the left-right relative position measuring device 1 according to this embodiment will be described. First, the displacement (X1) of the relative position of the rail 3 and the wheel 2 of the traveling vehicle in the left-right direction is continuously measured by the laser displacement meter 7. That is,
When the laser beam is emitted from the laser beam emitting device 9 of the laser displacement meter 7, the emitted laser irradiation light α enters the prism 8, is bent by the prism 8, and irradiates the side surface 3a of the rail 3. Is done. The irradiation light α applied to the rail 3 is diffusely reflected by the rail 3, and the diffusely reflected light is bent by the prism 8 and emitted into the housing 6. The light receiving line β which is a part of the reflected light radiated into the housing 6 irradiates the position detecting element 10 to form a spot A. And wheels 2 and rails 3
Is changed, the spot B is formed on the position detecting element 10 as shown by the dashed line in FIG. The continuous information of the spots A and B of the position detecting element 10 that continuously changes in this way is transmitted to the arithmetic unit 14, and the displacement X1 of the relative position between the wheel 2 and the rail 3 in the left-right direction is calculated. The displacement X1 is shown in FIG.

At the same time, the accelerometer 13 measures the amount of change in the acceleration of the running vehicle in the left-right direction, and transmits information on the change to the arithmetic unit 14. The change amount of the acceleration sent to the arithmetic unit 14 is integrated twice, and the displacement X2 of the left-right movement in the inertial space of the left-right relative position measuring device 1 is calculated. The displacement X2 is shown in FIG.
Shown in Then, the arithmetic device 14 calculates the sum X3 of the displacement X1 and the displacement X2, and the sum X3 is the amount of the track 3 deviation of the rail 3. That is, the position of the rail 3 with respect to the inertial space is measured. FIG. 7C shows the amount X3 of orbital deviation with respect to the inertial space.

FIG. 8 shows a front view of another embodiment of the method and the apparatus for measuring an out-of-orbit according to the present invention. This embodiment differs from the above embodiment in that a vertical relative position measuring device 15 for measuring the vertical relative position of the rail 3 is provided.
A second accelerometer 16 for measuring the acceleration of the vertical movement of the vehicle. The vertical relative position measuring device 15 has a structure in which irradiation light is directly applied to the top surface 3b of the rail 3 via a glass plate 17 provided on the bottom surface. The housing constituting the vertical relative position measuring device 15 is formed in a closed state,
Is part of a component that seals the housing. Other structures are the same as the left-right relative position measuring device 1. Thus, the vertical position of the rail with respect to the inertial space can be obtained in the same manner as described above.

In this embodiment, in addition to the prism surface of the left-right relative position measuring device, the cleaning liquid ejecting device 12 applies the cleaning solution straightly downward from the diagonal direction toward the outer surface of the glass plate 17 of the vertical relative position measuring device. A second nozzle 12d that sprays in a radial or radial manner is provided, so that the outer surface of the glass plate 17 can be cleaned.

In this embodiment, the method and the apparatus for measuring the deviation of the track by obtaining the displacement of the wheel with respect to the inertial space in addition to the measurement of the relative position of the rail and the wheel in the left-right direction have been described. However, the present invention is not limited to this, and the present invention may be applied to a method and an apparatus for measuring a track deviation by providing a laser displacement meter on each of three bogies installed in a vehicle for measurement.

[0031]

As described above, according to the present invention, the surface including the irradiation light and the light receiving line is perpendicular to the longitudinal direction of the rail, so that even if the laser light is weak, In addition, it is possible to prevent a measurement error caused by a pulse having a constant period from occurring as much as possible.

Further, according to the present invention, since the prism is used as the bent portion and forms a part of the component for forming the prism in a sealed state of the housing, dust is prevented from entering the housing. Thus, it is possible to prevent a measurement error from occurring as much as possible due to the influence of the wind and rain and dust on the laser beam.

Further, according to the present invention, since the jetting unit for jetting the cleaning liquid to the outer surface of the prism or the light transmitting plate is provided, the outer surface of the prism or the light transmitting plate is cleaned by the cleaning liquid and the running wind pressure of the vehicle. Then, the dust and the like adhered to the outer surface of the prism or the translucent plate after being dried can be removed, and the transmission and reception of light can be performed more reliably.

Further, according to the present invention, since a cutting portion which is easily cut by an impact is formed at a tip portion having a bent portion, the tip portion is easily cut by an impact, and It is possible to prevent the part from damaging the ground equipment, and to ensure the traveling safety of the vehicle.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of an apparatus for measuring track deviation according to the present invention, and the relationship between wheels and rails.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged side view showing a part of a main part of the present apparatus with a cutout.

FIG. 4 is an enlarged front view of a main part of the apparatus.

FIG. 5 is an explanatory diagram of an optical path of a laser beam by the present apparatus.

FIG. 6 is a block diagram showing a control mechanism in the present apparatus.

FIG. 7 is a block showing a measurement result obtained by the method and the apparatus.

FIG. 8 is a front view showing another embodiment of the apparatus for measuring a track deviation according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 left-right relative position measuring device 2 wheel 3 rail 3 a side surface 3 b top surface 6 housing 6 a tip 6 b cutting portion 7 laser displacement meter (measuring portion) 8 prism (laser beam bending portion) 8 a outer surface 9 laser emitting device (laser beam irradiation) Part) 10 position detecting element (laser light receiving part) 12 cleaning liquid ejecting device (injecting part) 15 vertical relative position measuring device 17 translucent plate (glass plate) α irradiation light β light receiving line

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kiuchi 2-8-3 Hikaricho, Kokubunji-shi, Tokyo Inside the Railway Technical Research Institute (72) Inventor Satoshi Mori 3-36-10 Shinjuku, Shinjuku-ku, Tokyo No. Nippon Kikai Line Co., Ltd.

Claims (6)

[Claims] 1. A laser beam is irradiated (α) on the side surface of the head of a rail (3), a part of the light diffusely reflected from the rail (3) is received, and the received light receiving line (β) is received. In the method of measuring the track deviation including the method of measuring the relative position of the rail (3) in the left-right direction from the amount of change in the relative position of the rail, the irradiation of the laser beam is performed by bending the laser beam to the side of the rail (3). And irradiating from the side, and a plane including the irradiation light (α) and the light receiving line (β) is perpendicular to the longitudinal direction of the rail (3). 2. A laser beam is irradiated (.alpha.) On the top surface of a rail (3) to receive a part of the light diffusely reflected from the rail (3), and a light receiving line (.beta.) In a method of measuring a track deviation including a method of measuring a vertical relative position of a rail (3) from a change amount of a relative position, a surface including the irradiation light (α) and the light receiving line (β) is a rail. (3) The method for measuring an orbital deviation characterized by being perpendicular to the longitudinal direction. 3. A laser beam is applied to the side of the head (3) of the rail (3).
a) a laser beam irradiating section (9), a laser beam receiving section (10) for receiving a part of the light diffusely reflected from the rail (3), and a laser beam receiving section received by the laser beam receiving section. A left-right relative position measuring device (1) for measuring a relative position of a rail (3) provided in a housing (6) in a left-right direction with a measuring unit (7) for measuring a change amount of a relative position of the light beam (β). ), The housing (6) is formed in a sealed state, and the laser beam irradiator (9) bends the laser beam disposed on the side of the rail (3). A laser beam bending portion (8), and a laser beam irradiating portion (9) and a laser beam receiving portion (1).
0) is located at a position where the surface including the irradiation light (α) and the light receiving line (β) is perpendicular to the longitudinal direction of the rail (3), and the laser beam bending portion (8) , A prism (8), the prism (8) being part of a component forming the housing (6) in a sealed state, characterized in that it comprises an orbital deviation measuring device. 4. The apparatus according to claim 3, further comprising an ejection portion for ejecting a liquid to an outer surface of the prism. 5. A track according to claim 3, wherein a cutting portion (6b) whose tip is cut by impact is formed at a tip (6a) of the device provided with the laser beam bending portion (8). A device that measures out of order. 6. A laser beam is applied to a top surface (3b) of a rail (3).
A laser beam irradiating section (9) for irradiating the laser beam, a laser beam receiving section (10) for receiving a part of reflected light diffusely reflected from the rail (3), and a light receiving line ( Measuring unit (7) that measures the amount of change in the relative position of β)
And a vertical direction relative position measuring device (15) for measuring a vertical relative position of a rail (3) provided in a housing (6), wherein the housing (6) comprises: The laser beam irradiating section (9) and the laser beam receiving section (10) are formed in a sealed state, and the plane including the irradiation light (α) and the light receiving line (β) is in the longitudinal direction of the rail (3). Is installed at a right angle to
The laser beam irradiator (9) irradiates the top of the rail with irradiation light (α) via a translucent plate (17) disposed above the rail (3), (17) forms a part of a component for sealing the housing, and is provided with a jetting portion for jetting a liquid on the outer surface of the light-transmitting plate (17). Equipment to do.