JP2013029452A - Angle adjuster and level sensor device with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an angle adjuster that easily makes an angle adjustment.SOLUTION: An angle adjuster 40 includes a shaft 43 which includes a spherical part 43a, and holding plates 41, 42 which receive and hold the spherical part 43a. A marker line L for tilt angle adjustment is provided on an outer peripheral surface of the spherical part 43a, and the holding plate 42 is provided with a first opening part for exposing a part of the spherical part 43a. On the holding plate 42, a scale plate 46 having a second opening part 46b into which the spherical part 43a can be inserted is arranged rotatably. The scale plate 46 is provided with a marker part P for rotational angle adjustment. First graduations S1 that indicate tilt angles according to positions that a part of intersection of the marker line L1 and a peripheral edge of the second opening part 46b indicates are added to the peripheral edge of the second opening part 46b, and second graduations S2 that indicate rotational angles according to positions that the marker part P indicates are added to a peripheral edge of the first opening part. The first graduations S1 are added axisymmetrically with respect to a straight line L passing the marker part P.

Description

  The present invention relates to an angle adjuster capable of adjusting an object to be angled to a desired angle, and by installing the angle adjuster, a non-contact level sensor is installed at a desired angle. The present invention relates to a level sensor device configured to be able to

  Conventionally, the thing of various structures is known as an angle adjuster which can adjust the target object which should adjust an angle to a desired angle. One of them has a structure similar to a ball joint (ball joint), and a spherical portion is provided in a support portion that supports an object, and the spherical portion is slidably held by a holding portion. The angle of the object can be adjusted to the angle, and further, a fixing means for fixing the spherical portion so as not to slide is provided, and the angle of the object is maintained by fixing the spherical portion using the fixing means after the angle adjustment. There is known an angle adjuster configured to be configured. When the angle adjuster having the configuration is used, there is a merit that the degree of freedom of the adjustable angle range becomes very high.

  The angle adjuster having the above configuration is used in various product fields such as a level sensor device and an antenna device. Here, the level sensor device is a device that detects the level (that is, the height) of the surface of the stored object by being installed in a tank or silo in which the stored object such as liquid or powder is stored. By using the sensor device, the remaining amount of the stored matter can be detected. Examples of the level sensor device provided with the angle adjuster having the above-described configuration include those disclosed in Japanese Patent Application Laid-Open No. 6-11328 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2008-107356 (Patent Document 2).

JP-A-6-11328 JP 2008-107356 A

  However, when the angle adjuster having the above configuration is used, the degree of freedom of the adjustable angle range becomes very high, but the rotational operation of the spherical portion is not basically restricted when the angle of the object is adjusted. Therefore, there is a problem that the angle adjustment operation becomes difficult. In particular, when performing fine adjustment of the angle of the object, there is no particular standard for adjustment and there is a problem that the angle adjustment work becomes very difficult.

  In addition, once the object has been adjusted to the desired angle using the angle adjuster having the above-described configuration and then installed, if the angle adjuster is removed for maintenance, etc., this is again set to the same angle. However, there are no adjustment guidelines that can be used during the re-installation work, so it is difficult to reproduce this easily. As a result, the angle adjustment work is re-executed. There is also a problem that the work is required and the work is greatly complicated.

  In addition, when performing the angle adjustment work, it may be possible to facilitate the work by separately preparing an angle meter, a level, etc. and performing the work using these. However, it is not always possible to dramatically improve workability, and there is a problem that these cannot be used effectively in an environment where vibration is occurring. The situation was strongly demanded.

  Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide an angle adjuster capable of easily adjusting the angle, and also includes the angle adjuster. Accordingly, an object of the present invention is to provide a level sensor device configured so that a non-contact type level sensor can be easily installed at a desired angle.

  An angle adjuster according to the present invention includes an inclination angle formed by a first reference axis orthogonal to an installation surface and an adjustment target axis of an object to be angle-adjusted, and a second reference axis and the adjustment target axis included in the installation surface. The angle of the object can be adjusted by adjusting the rotation angle formed by the projection line on the installation surface, and includes a support portion, a holding portion, and a fixing means. The support portion includes a spherical portion whose outer peripheral surface is spherical and supports the object. The holding portion is fixed to the installation surface and receives and holds the spherical portion so as to be slidable. The fixing means fixes the spherical portion held by the holding portion so that the object is maintained at a predetermined angle. On the outer peripheral surface of the spherical portion, there is provided a mark line for adjusting the tilt angle having a perfect circular shape centering on the adjustment target axis. The holding portion is provided with a first opening that exposes a part of the spherical portion by having an opening surface whose outer shape centering on the first reference axis has a perfect circular shape. On the main surface of the holding portion on the side where the opening surface is located, a scale plate having a second opening through which the spherical portion can be inserted is disposed so as to be rotatable around the spherical portion. . The scale plate is provided with a mark portion for adjusting the rotation angle. A first scale indicating the inclination is attached to the periphery of the second opening provided on the scale plate according to the position indicated by the portion where the mark line and the periphery of the second opening cross. . A second scale indicating the rotation angle is attached to the periphery of the first opening provided in the holding portion according to the position indicated by the mark portion. The first scale is attached symmetrically with respect to a straight line connecting the intersection of the first reference axis with respect to the main surface of the scale plate and the mark portion.

  In the angle adjuster according to the present invention, a plurality of the mark lines may be provided concentrically around the adjustment target axis. In this case, the first scale is the plurality of marks. It is preferable to attach according to each of the lines.

  In the angle adjuster according to the present invention, it is preferable that the holding portion includes a pair of clamping members for holding the spherical portion by sandwiching the spherical portion. It is preferable that the pair of sandwiching members have a receiving portion that slidably receives the spherical portion by being formed in a spherical concave shape along the outer peripheral surface of the spherical portion. Furthermore, in that case, it is preferable that the fixing means is constituted by a fastening means for fixing the spherical portion in a non-slidable manner in the receiving portion by fastening the pair of clamping members.

  The level sensor apparatus based on this invention is equipped with the angle adjuster based on the said invention mentioned above, and a non-contact-type level sensor as said target object.

  In the level sensor device according to the present invention, the non-contact type level sensor may be an ultrasonic level sensor.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the angle adjuster which can perform angle adjustment easily. In addition, by providing the angle adjuster, it is possible to provide a level sensor device that can easily install a non-contact type level sensor at a desired angle.

It is a front view of the angle adjuster in embodiment of this invention, and the level sensor apparatus provided with the same. It is a schematic cross section which shows the state which installed the level sensor apparatus shown in FIG. 1 in the silo. It is a figure for demonstrating the concept of the angle adjustment method of the level sensor apparatus using the angle adjuster shown in FIG. It is a perspective view of the angle adjuster shown in FIG. It is principal part sectional drawing which shows the installation structure to the silo of the level sensor apparatus shown in FIG. It is an exploded view which shows the assembly structure of the angle adjuster shown in FIG. It is an exploded view which shows the assembly | attachment structure to the silo of the angle adjuster shown in FIG. In the level sensor device shown in FIG. 1, it is a partially broken plan view of the angle adjuster when both the tilt angle and the rotation angle are 0 °. In the level sensor apparatus shown in FIG. 1, it is a partially broken plan view of the angle adjuster when the tilt angle is 6 ° and the rotation angle is 10 °. FIG. 2 is a partially broken plan view of the angle adjuster when the tilt angle is 15 ° and the rotation angle is −25 ° in the level sensor device shown in FIG. 1.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the embodiment described below, as an example of the level sensor device to which the present invention is applied, a level sensor device including an ultrasonic level sensor that is a non-contact type level sensor is illustrated, and the present invention is applied. As the angle adjuster, the angle adjuster provided in the level sensor device will be described as an example.

  FIG. 1 is a front view of an angle adjuster and a level sensor device having the same according to an embodiment of the present invention. First, a schematic configuration of the level sensor device and the angle adjuster in the present embodiment will be described with reference to FIG.

  As shown in FIG. 1, the level sensor device 1 mainly includes a stem 10, an ultrasonic level sensor 20, a terminal box 30, and an angle adjuster 40. Among these, the ultrasonic level sensor 20 corresponds to an object whose angle is to be adjusted, and the angle adjuster 40 allows the installation angle of the ultrasonic level sensor 20 to be freely adjusted. In addition, the level sensor device 1 in the present embodiment is configured to be able to suitably detect the level of the powder surface 201 of the powder 200 stored in the silo 100 described later (see FIG. 2).

  The stem 10 is composed of a pipe-like member extending linearly. An ultrasonic level sensor 20 is attached to the lower end of the stem 10, and a terminal box 30 is attached to the upper end of the stem 10. The stem 10 is a member that constitutes a part of a support portion that supports the ultrasonic level sensor 20.

  The ultrasonic level sensor 20 measures the distance to the detection target by transmitting ultrasonic waves through the sensor surface 22 and receiving the reflected waves through the sensor surface 22. More specifically, the ultrasonic level sensor 20 converts an applied electric signal into an ultrasonic wave and transmits the ultrasonic wave, receives a reflected wave of the transmitted ultrasonic wave, and converts it into an electric signal. Thus, the distance from the ultrasonic element to the detection target is measured by measuring the time from the transmission of the ultrasonic wave to the reception of the reflected wave.

  The terminal box 30 is a part for performing an electrical connection between the level sensor device 1 and an external terminal, and the terminal box 30 is provided with various input / output terminals. The input / output terminal is connected to the ultrasonic level sensor 20 via a lead wire inserted into the stem 10.

  Both the ultrasonic level sensor 20 and the terminal box 30 described above are fixed to the stem 10 by sockets 21 and 31 attached thereto.

  As described above, the angle adjuster 40 allows the installation angle of the ultrasonic level sensor 20 to be freely adjusted, and is attached to an intermediate position of the stem 10. The angle adjuster 40 mainly includes a pair of holding plates 41 and 42, a shaft 43, and a scale plate 46. Among these, the pair of holding plates 41 and 42 are fixed to each other by fixing means described later, and the shaft 43 is held by the pair of holding plates 41 and 42 fixed to each other, thereby the pair of holding plates. 41 and 42 are fixed. Further, the shaft 43 is fixed to the stem 10 by the shaft fixing tool 11, and the scale plate 46 is rotatably attached to the shaft 43.

  Here, each of the shaft 43 and the shaft fixture 11 is a member that constitutes a part of a support portion that supports the ultrasonic level sensor 20, and the pair of holding plates 41 and 42 receive and hold the shaft 43. It is a member which comprises a part of holding | maintenance part. The more detailed shapes and assembly structures of these members will be described later.

  FIG. 2 is a schematic cross-sectional view showing a state in which the level sensor device shown in FIG. 1 is installed in a silo. Next, a state where the level sensor device according to the present embodiment is actually installed in the silo will be described with reference to FIG.

  As shown in FIG. 2, the silo 100 has a storage chamber 110 that stores the powder 200 that is a stored material. In addition, as the powder 200, all things, such as earth and sand, cement, a resin pellet, a granular chemical | medical agent, a grain, are assumed. The silo 100 has a discharge port (not shown) at its lower end, and the powder 200 is discharged from the discharge port in the direction of arrow D shown in the figure. As a result, the powder surface 201 of the powder 200 is gradually lowered. In addition, in FIG. 2, a mode that the powder surface 201 descend | falls is shown typically.

  In order to detect the displacement of the powder surface 201, the level sensor device 1 according to the present embodiment is installed on an installation portion 120 provided at the upper end of the silo 100 via an attachment plate 121. Here, the level sensor device 1 takes into account the structural limitations of the silo 100 and the fact that the powder surface 201 is formed in a non-planar shape with a predetermined angle of repose because the stored material is the powder 200. In many cases, it is installed at a position near the periphery of the upper end of the. Even in such a case, the level sensor device 1 is arranged so that the level of the powder level 201 can be detected more reliably, the sensor surface of the ultrasonic level sensor 20 toward or near the position where the discharge port of the silo 100 is provided. It is inclined and arranged at a predetermined angle so that 22 faces directly.

  The installation angle of the level sensor device 1 that is inclined is varied depending on the specifications of the silo 100, the type of powder 200 stored, and the like. Therefore, the installation angle of the level sensor device 1 needs to be adjusted individually according to the silo 100 installed. Therefore, in the level sensor device 1 according to the present embodiment, the angle adjuster 40 described above is provided so that the installation angle can be adjusted to an optimum angle. Normally, the installation angle is adjusted by connecting an oscilloscope or the like to the level sensor device 1 to determine whether the output of the ultrasonic level sensor 20 can be detected with high sensitivity according to the actual level of the powder surface 201. It is carried out while monitoring using.

  FIG. 3 is a diagram for explaining the concept of the angle adjustment method of the level sensor device using the angle adjuster shown in FIG. Next, the concept of the angle adjustment method of the level sensor device using the angle adjuster in the present embodiment will be described with reference to FIG.

  As shown in FIG. 3, in the present embodiment, the adjustment target axis A for adjusting the angle of the level sensor device 1 extends in alignment with the direction in which the axis of the stem 10 extends. Here, when the installation surface IP of the level sensor device 1 is used as a reference, the inclination angle θ1 formed by the first reference axis RA1 orthogonal to the installation surface IP and the adjustment target axis A is included in the installation surface IP. (2) If the rotation angle θ2 formed by the reference axis RA2 and the projection line A ′ of the adjustment target axis A on the installation surface IP is determined, the inclination of the adjustment target axis A in a three-dimensional sense is uniquely determined. become. Therefore, in the present embodiment, the inclination angle θ1 and the rotation angle θ2 are used as a guide for angle adjustment, and the installation angle is easily adjusted using the inclination angle θ1 and the rotation angle θ2. A level sensor device 1 is configured.

  FIG. 4 is a perspective view of the angle adjuster shown in FIG. 1, and FIG. 5 is a cross-sectional view of the main part showing the installation structure of the level sensor device shown in FIG. 1 in the silo. 6 is an exploded view showing the assembly structure of the angle adjuster shown in FIG. 1, and FIG. 7 is an exploded view showing the assembly structure of the angle adjuster shown in FIG. 1 to the silo. Next, referring to these FIG. 4 to FIG. 7, the shape and assembly structure of various members constituting the angle adjuster in the present embodiment, the installation structure of the angle adjuster in the silo, and the assembly structure of the stem Etc. will be described in detail.

  4 and 5, as described above, the angle adjuster 40 includes a pair of holding plates 41 and 42 that constitute a part of the holding part, a shaft 43 that constitutes a part of the support part, In addition to the scale plate 46, an O-ring 44 constituting a part of the holding portion and a bolt 45 as a fixing means for fixing the pair of holding plates 41 and 42 to each other are further provided.

  The shaft 43 has a cylindrical shape and has a through hole through which the stem 10 is inserted. A spherical portion 43 a having a spherical outer peripheral surface is provided at the lower end of the shaft 43, and a socket portion 43 b is provided at the upper end of the shaft 43.

  As shown in FIGS. 5 and 7, a hollow cylindrical rubber bush 13 is inserted into the socket portion 43 b, and an annular flat plate washer 12 is further provided on the upper surface of the rubber bush 13. Is arranged. A shaft fixture 11 is disposed on the top surface of the washer 12. The rubber bush 13 and the washer 12 are members that constitute part of a support portion that supports the ultrasonic level sensor 20.

  Here, a female screw is provided at a predetermined position on the inner peripheral surface of the socket portion 43 b, and a male screw that is screwed to the female screw is provided on the outer peripheral surface of the shaft fixture 11. As a result, as shown in FIG. 5, the shaft 10 is screwed into the socket portion 43b with the stem 10 inserted in the through hole of the shaft 43, so that the rubber bush 13 passes through the washer 12. The shaft 10 is deformed by being compressed by the shaft fixture 11, and the inner peripheral surface of the deformed rubber bush 13 is brought into pressure contact with the outer peripheral surface of the stem 10, so that a predetermined position of the stem 10 is obtained by the tightening force and friction force The shaft 43 is fixed to the shaft.

  On the other hand, as shown in FIG. 5, the pair of holding plates 41 and 42 as the clamping members have receiving portions 41 a and 42 a that are formed in a spherical concave shape along the outer peripheral surface of the spherical portion 43 a of the shaft 43. ing. More specifically, the first holding plate 41 that holds the lower end portion of the spherical portion 43a is provided with an opening including a spherical concave receiving portion 41a that increases in diameter toward the upper side. The second holding plate 42 that holds the upper end portion of 43a is provided with a first opening 42b including a spherical concave receiving portion 42a whose diameter increases toward the lower side. In addition, at the position on the upper end side of the first holding plate 41, an accommodation recess for accommodating the O-ring 44 is provided continuously to the opening including the receiving portion 41 a described above.

  As shown in FIGS. 4 and 5, by providing the first opening 42b described above in the second holding plate 42, the second holding plate 42 has an outer shape centered on the first reference axis RA1 (see FIG. 3). Has a perfect circular opening surface, and a portion near the upper end of the spherical portion 43a is exposed to the outside through the opening surface.

  As shown in FIGS. 4 and 5, a bolt insertion hole is provided around the receiving portion 42a of the second holding plate 42 for inserting the bolts 45 in a dot array along the circumferential direction. A portion of the first holding plate 41 facing the bolt insertion hole is provided with a bolt fixing hole having an internal thread on the inner peripheral surface. Accordingly, as shown in FIGS. 5 and 6, the spherical portion 43a is received and held by the receiving portions 41a and 42a provided on the pair of holding plates 41 and 42, so that the spherical portion 43a is received by the pair of holding plates. A pair of holdings is obtained by inserting the bolt 45 into the bolt insertion hole described above and lightly screwing into the bolt fixing hole (that is, screwing with a relatively weak force). The plates 41 and 42 are fastened, and the spherical portion 43a is slidably received and held by the pair of holding plates 41 and 42.

  Further, an O-ring 44 is accommodated in the accommodating recess provided in the first holding plate 41 described above. Therefore, when the bolt 45 is further screwed (that is, screwed with a strong force), the pair of holding plates 41 and 42 are tightened more firmly, and the O-ring 44 is secured by the pair of holding plates 41 and 42. The inner peripheral surface of the deformed O-ring 44 comes into pressure contact with the outer peripheral surface of the spherical portion 43a, and the spherical portion 43a is slid by the tightening force and frictional force. It will be fixed immovably. As a result, the O-ring 44 also ensures the sealing performance at the portion.

  As shown in FIGS. 4 and 5, the first holding plate 41 is composed of a member having a larger diameter than the second holding plate 42, and the first holding plate 41 and the second holding plate 42 are connected to the bolt 45. In a state where the first holding plate 41 is screwed together, a portion near the outer peripheral edge of the first holding plate 41 is exposed. The exposed portion of the first holding plate 41 is provided with a bolt insertion hole for inserting the stud bolt 122 in a dotted line shape along the circumferential direction.

  Here, as shown in FIG. 5, the stud bolt 122 is provided on the attachment plate 121 attached to the installation part 120 of the silo 100. Accordingly, as shown in FIGS. 5 and 7, the stud bolt 122 is inserted into the bolt insertion hole provided in the first holding plate 41 described above, and a flat washer 52, a spring is further attached to the stud bolt 122. The first holding plate 41 is firmly fixed to the mounting plate 121 by extrapolating the washer 53 and then screwing the nut 54 into the stud bolt 122. Note that a sheet-like gasket 51 is interposed between the first holding plate 41 and the mounting plate 121, so that the airtightness of the storage chamber 110 of the silo 100 is maintained.

  Further, as shown in FIGS. 4 to 6, the spherical portion 43a can be inserted on the upper surface of the second holding plate 42 where the opening surface provided to expose the portion near the upper end of the spherical portion 43a is located. A scale plate 46 having a second opening 46b is disposed. Here, the second opening 46b has an opening diameter slightly larger than the spherical portion 43a at the position where the scale plate 46 is disposed. Thus, the scale plate 46 is configured to be rotatable around the spherical portion 43a.

  By adopting the assembly structure of the angle adjuster 40, the installation structure of the angle adjuster 40 on the silo 100, and the assembly structure of the stem 10 described above, the level sensor device 1 according to the present embodiment is provided. Since the spherical portion 43a of the shaft 43 that supports the stem 10 to which the ultrasonic type level sensor 20 is attached is slidably held by the pair of holding plates 41, 42, the bolt 45 described above is light. In the screwed state, the angle of the ultrasonic level sensor 20 can be adjusted to an arbitrary angle. Furthermore, the spherical portion 43a is fixed to the pair of holding plates 41, 42 in a state where the bolt 45 is firmly fastened. Thus, the angle of the ultrasonic level sensor 20 is reliably maintained after the angle adjustment.

  Here, in the angle adjuster 40 and the level sensor device 1 having the same according to the present embodiment, the inclination angle θ1 and the rotation angle θ2 (see FIG. 3) described above are used as a guide for angle adjustment. The angle of the ultrasonic level sensor 20 can be easily adjusted. This will be described in detail below.

  FIG. 8 is a partially broken plan view of the angle adjuster when the tilt angle and the rotation angle are both 0 ° in the level sensor device shown in FIG. 1. 8 is a plan view with the shaft cut along the line VIII-VIII shown in FIG. 5. In the state shown in FIG. 8, both the tilt angle θ1 and the rotation angle θ2 are 0 as described above. The neutral position adjusted in degrees (that is, the position where the adjustment target axis A and the first reference axis RA1 overlap) is shown.

  As shown in FIGS. 4 and 8, in the angle adjuster 40 and the level sensor device 1 including the angle adjuster 40 according to the present embodiment, the adjustment target shaft is located at a predetermined position on the outer peripheral surface of the spherical portion 43 a of the shaft 43. Mark lines L1 and L2 having a perfect circular shape centering on A are provided. The mark lines L1 and L2 are provided concentrically around the adjustment target axis A. These mark lines L1 and L2 serve as marks for adjusting the tilt angle θ1 described above.

  Further, as shown in FIG. 8, a mark portion P is provided at a predetermined position on the periphery of the upper surface of the scale plate 46. The mark portion P serves as a mark for adjusting the rotation angle θ2 described above.

  On the other hand, as shown in FIGS. 4 and 8, a first scale S <b> 1 is attached to a predetermined position on the periphery of the second opening 46 b provided in the scale plate 46. The first scale S1 is used to adjust the inclination angle θ1 in combination with the above-described mark lines L1 and L2, and specifically, the first scale S1 has the spherical portion 43a of the shaft 43 inclined. When arranged, the inclination angle θ1 is attached according to the position indicated by the portion where the mark lines L1 and L2 intersect with the second opening 46b.

  As shown in FIGS. 4 and 8, a second scale S <b> 2 is attached to a predetermined position on the periphery of the first opening 42 b provided in the second holding plate 42. The second scale S2 is used to adjust the rotation angle θ2 in combination with the mark portion P described above, and specifically, the second scale S2 corresponds to the position indicated by the mark portion P. Attached so as to represent the rotation angle θ2.

  Here, as shown in FIG. 8, the first scale S1 is provided so as to be line-symmetric with respect to a straight line L connecting the intersection point of the first reference axis RA1 with the main surface of the scale plate 46 and the mark portion P. Thus, the scale plate 46 is graduated symmetrically with respect to the straight line L as a boundary. In addition, the first scale S1 is provided so as to overlap the main surface of the scale plate 46 so as to include scales corresponding to the mark lines L1 and L2.

  Thus, by providing the spherical portion 43a, the scale plate 46, and the second holding plate 42 with the mark lines L1, L2, the mark portion P, the first scale S1, and the second scale S2, the mark lines L1, L2, and the second The tilt angle θ1 can be grasped by using the one scale S1, and the rotation angle θ2 can be grasped by using the mark portion P and the second scale S2.

  9 and 10 are partially broken plan views of the angle adjuster when the spherical portion 43a of the shaft 43 is inclined in the level sensor device shown in FIG. 9 illustrates a case where the adjustment target axis is tilted so that the tilt angle θ1 is 6 ° and the rotation angle θ2 is 10 °. In FIG. 10, the tilt angle θ1 is 15 ° and the rotation is performed. The case where the adjustment target axis is tilted so that the angle θ2 is −25 ° is illustrated.

  As shown in FIGS. 9 and 10, when the spherical portion 43a of the shaft 43 is inclined, mark lines L1 and L2 provided around the adjustment target axis A when the adjustment target axis A is inclined. Will also be inclined, and the mark lines L1 and L2 will intersect the peripheral edge of the second opening 46b of the scale plate 46.

  At this time, when the adjustment target axis A is inclined at a predetermined angle or more, the portion where the mark lines L1 and L2 intersect with the peripheral edge of the second opening 46b is, for example, 2 of C1 and C2 as shown in the figure. The scale plate 46 is rotated and arranged so that the pair of left and right scales of the first scale S1 coincides with each of the two places, and the scale to be adjusted is read by reading the scale attached to the part. The inclination angle θ1 formed by the axis A and the first reference axis RA1 can be grasped.

  As shown in FIG. 9, when the tilt angle θ1 is a relatively small angle, the mark line L1 provided on the lower end side along the adjustment target axis A can be used, and as shown in FIG. When the inclination angle θ1 is a relatively large angle, a mark line L2 provided on the upper end side along the adjustment target axis A can be used. Thus, if a plurality of mark lines are provided, the adjustment range of the tilt angle θ1 can be easily expanded.

  Here, as shown in FIGS. 9 and 10, the upper limit value of the angle range of the inclination angle θ1 indicated by the scale provided so as to correspond to the mark line L1 among the double scales included in the first scale S1. The mark lines L1 and L2 and the first scale S1 are configured so that the lower limit value of the angle range of the inclination angle θ1 indicated by the scale provided so as to correspond to the mark line L2 is overlapped. Then, when adjusting the tilt angle θ1, it is possible to smoothly shift from reading the scale using the mark line L1 to reading the scale using the mark line L2, and further convenience is ensured. Will be.

  In this embodiment, as shown in FIGS. 9 and 10, the angle range of the inclination angle θ1 read using the mark line L1 is set to 2 ° to 12 °, and the mark line L2 is used. Thus, the angle range of the tilt angle θ1 read is set from 9 ° to 21 °. Accordingly, the overlapping portion of these angle ranges is 9 ° to 12 °, and the inclination angle θ1 can be adjusted using either the mark line L1 or the mark line L2 within the angle range.

  At this time, since the mark portion P is provided on the straight line L (see FIG. 8) which is a line symmetry reference of the first scale S1 provided on the scale plate 46, the second scale indicated by the mark portion P is provided. By reading the scale of S2, the rotation angle θ2 formed by the adjustment target axis A and the second reference axis RA2 can be grasped at the same time.

  Therefore, when the installation angle of the ultrasonic level sensor that is the object of angle adjustment is known in advance, the angle adjustment is performed using the mark lines L1 and L2, the mark portion P, the first scale S1, and the second scale S2 as a guide. By performing the work, the work can be performed very easily. Here, when the installation angle can be grasped in advance, it is possible to roughly grasp a suitable installation angle based on the specification of the silo, the type of stored powder, etc. at the time of initial installation. Then, when only fine adjustment is necessary, or at the time of maintenance, the inclination angle θ1 and the rotation angle θ2 at the time of initial installation are recorded in advance, and it is only necessary to perform installation based on the record at the time of re-installation. Cases are included.

  Further, even when a suitable installation angle cannot be grasped at the time of initial installation or the like, by performing the angle adjustment work using the mark lines L1, L2, the mark portion P, the first scale S1, and the second scale S2 as a guideline, Significant improvement in angle adjustment work is expected. That is, in the angle adjustment of the above configuration, since the spherical portion is not particularly restricted during the angle adjustment, the work may be difficult, but the above-described mark lines L1, L2, mark portion P, first By using the scale S1 and the second scale S2 as a guide, the angle adjustment work can be performed more efficiently and in a short time.

  As described above, the angle adjuster 40 according to the present embodiment and the level sensor device including the angle adjuster 40 can be used as an angle adjuster capable of easily adjusting the angle, and the ultrasonic level. It is possible to provide a level sensor device in which the sensor 20 can be easily installed at a desired angle.

  In the above-described embodiment of the present invention, the case where the present invention is applied to a level sensor device configured to be able to detect suitably the powder level of the powder stored in the silo is illustrated. As described above, the present invention can naturally be applied to a level sensor device configured to be able to suitably detect the level of the liquid level stored in the tank.

  Further, in the above-described embodiment of the present invention, the case where the present invention is applied to a level sensor device including an ultrasonic level sensor has been described as an example. Of course, the present invention can be applied to a level sensor device provided with a type level sensor. Examples of other non-contact level sensors include laser level sensors and microwave level sensors.

  Further, the present invention is not limited to the level sensor device and the angle adjuster provided therein, and is applied to any device that requires angle adjustment in a three-dimensional sense, such as an antenna device. It goes without saying that is possible.

  Thus, the one embodiment disclosed this time is illustrative in all respects and is not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1 level sensor device, 10 stem, 11 shaft fixture, 12 washer, 13 rubber bush, 20 ultrasonic level sensor, 21 socket, 22 sensor surface, 30 terminal box, 31 socket, 40 angle adjuster, 41 first holding Plate, 41a receiving portion, 42 second holding plate, 42a receiving portion, 42b first opening portion, 43 shaft, 43a spherical portion, 43b socket portion, 44 O-ring, 45 bolt, 46 scale plate, 46b second opening portion, 51 Gasket, 52 Plain washer, 53 Spring washer, 54 Nut, 100 Silo, 110 Storage chamber, 120 Installation part, 121 Mounting plate, 122 Stud bolt, 200 Powder, 201 Powder surface, A Adjustment target axis, A ′ Projection line , IP installation surface, RA1 first reference axis, RA2 second reference axis, L1, L2 mark line, P eye Mark, S1 first scale, S2 second scale, θ1 tilt angle, θ2 rotation angle.

Claims (5)

An inclination angle formed by a first reference axis orthogonal to the installation surface and an adjustment target axis of the object to be angle-adjusted, and a second reference axis included in the installation surface and a projection line of the adjustment target axis onto the installation surface An angle adjuster configured to be capable of adjusting the angle of the object by adjusting each rotation angle formed,
Including a spherical portion whose outer peripheral surface is spherical, and a support portion for supporting the object;
A holding portion fixed to the installation surface and slidably receiving and holding the spherical portion;
Fixing means for fixing the spherical portion held by the holding portion so that the object is maintained at a predetermined angle;
On the outer peripheral surface of the spherical portion, there is provided a mark line for adjusting the tilt angle having a perfect circular shape centering on the adjustment target axis,
The holding portion is provided with a first opening that exposes a part of the spherical portion by having a perfect circular opening with an outer shape centered on the first reference axis,
On the main surface of the holding portion on the side where the opening surface is located, a scale plate having a second opening through which the spherical portion can be inserted is disposed so as to be rotatable around the spherical portion,
The scale plate is provided with a mark for adjusting the rotation angle,
A first tick indicating the tilt angle is attached to the periphery of the second opening provided in the scale plate according to the position indicated by the portion where the mark line and the periphery of the second opening intersect,
On the periphery of the first opening provided in the holding part, a second scale indicating the rotation angle is attached according to the position indicated by the mark part,
The angle adjuster, wherein the first scale is provided symmetrically with respect to a straight line connecting an intersection of the first reference axis with respect to a main surface of the scale plate and the mark portion. A plurality of the mark lines are provided concentrically around the adjustment target axis,
The angle adjuster according to claim 1, wherein the first scale is attached according to each of the plurality of mark lines. The holding part includes a pair of clamping members for holding the spherical part by sandwiching the spherical part,
The pair of clamping members have a receiving portion that slidably receives the spherical portion by being formed into a spherical concave shape along the outer peripheral surface of the spherical portion,
3. The angle adjuster according to claim 1, wherein the fixing unit includes a fastening unit that fastens the pair of clamping members to fix the spherical portion in a non-slidable manner in the receiving portion. An angle adjuster according to any one of claims 1 to 3,
A level sensor device comprising a non-contact type level sensor as the object.   The level sensor device according to claim 4, wherein the non-contact type level sensor is an ultrasonic level sensor.

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