JP2020063666A - Roller type water gate and roller rotation state determination method of roller type water gate - Google Patents

Abstract

To provide a roller type water gate allowing a rotation state of a roller to be easily confirmed.SOLUTION: A water gate 100 (roller type water gate) includes: a water gate body 2 elevating or lowering so as to open or block circulation of water; gate guides 12 extending in an elevating/lowering direction of the water gate body 2; and rollers 21 which are provided on the water gate body 2 and are rotated along with elevation and lowering of the water gate body 2 in a state in contact with the gate guides 12. The water gate 100 includes non-contact sensors 25 which detect rotation states of the rollers 21 along with elevation and lowering of the water gate body 2.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a roller sluice, and more particularly to a roller sluice having a roller that rotates in contact with a door stop and a method for determining a rotational state of a roller of the roller sluice.

  BACKGROUND ART Conventionally, there is known a roller-type water gate that includes a roller that rotates while being in contact with a door stop (for example, see Patent Document 1).

  In the above-mentioned Patent Document 1, a pair of pillars provided with guide grooves extending in the vertical direction, a gate main body that is arranged between the pair of pillars and that can be raised and lowered to open and close a water channel, and a door stop member. There is disclosed a roller gate including a guide roller (roller) that rotates in a state of being in contact with a door stop member. The door stop member of the roller gate is arranged on the inner surface of the guide groove and is formed along the extending direction of the guide groove. Further, the guide rollers of the roller gate are attached to both sides of the gate body so as to be arranged in the guide groove. The guide roller (roller) of the roller gate is often arranged below the water surface.

JP, 2003-129453, A

  However, in the roller gate described in Patent Document 1, since the guide roller (roller) is arranged in the guide groove, the guide roller is visually or visually palpated due to being obstructed by the support column and the gate body. It is not easy to inspect it directly. Furthermore, if the guide roller is arranged below the water surface, it is more difficult to directly inspect the guide roller due to the water in the water channel. Therefore, even if there is a problem in the rotation state of the guide roller such that the guide roller is stuck, the rotation state of the guide roller cannot be easily confirmed. It is not possible to easily determine whether there is a defect. Therefore, there is a demand for a roller sluice that can easily confirm the rotating state of the guide roller.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a roller sluice and a roller sluice capable of easily confirming a rotating state of a guide roller. It is to provide a method for determining a rotation state of a roller.

  In order to achieve the above-mentioned object, the roller type floodgate in the first aspect of the present invention is a floodgate main body that moves up and down so as to open or block the flow of water, a door stop extending in the vertical direction of the floodgate main body, and a floodgate main body. It is equipped with a roller that rotates in contact with the door stop when the sluice main body moves up and down, and a detector that detects the rotation state of the roller when the sluice main body moves up and down. Based on this, it is configured to judge whether or not the rotation state of the roller when the water gate main body is moved up and down is the allowable rotation state of the roller.

  In the roller-type water gate according to the first aspect of the present invention, as described above, the detection unit that detects the rotation state of the roller associated with the elevation of the water-gate main body is provided. Accordingly, the rotation state of the roller can be easily confirmed by the detection unit without directly inspecting the roller by visual inspection or touch. As a result, it is possible to easily determine whether or not there is a problem regarding the rotation state of the roller.

  In the roller floodgate according to the first aspect described above, preferably, the detection unit includes a non-contact sensor that detects a rotation state of the roller in a non-contact manner. According to this structure, unlike the case where the rotation state of the roller is detected by using the contact sensor, even if some foreign matter adheres to the non-contact sensor, the rotation state of the roller can be continuously detected by the non-contact sensor. it can. As a result, it is possible to prevent the rotation state of the roller from becoming undetectable due to the surrounding environment of the roller.

  In this case, preferably, the non-contact sensor is a magnetic body attached to either the roller or the sluice body, and a magnetic sensor attached to the other of the roller or the sluice body and capable of detecting the approach of the magnetic body. Have. According to this structure, the rotation state of the roller can be detected based on the approach of the magnetic body due to the rotation of the roller. Further, since the magnetic field is less likely to be blocked by the foreign matter as compared with the case of non-contact detection by light, it is possible to reliably prevent the rotation state of the roller from being undetectable due to the surrounding environment of the roller.

  According to a second aspect of the present invention, there is provided a method for determining a roller rotation state of a roller-type floodgate, which is configured to open or block the flow of water by lifting and lowering the floodgate main body provided with the rollers. The process of detecting the rotation state of the roller that rotates in contact with the door stop that extends in the vertical direction of the main body, and the rotation state of the roller when the main body of the water gate moves up and down is based on the detected rotation state of the roller. And a step of determining whether or not it is in a state.

  According to the present invention, as described above, it is possible to provide a roller sluice capable of easily confirming the rotation state of a roller and a method for determining a rotation state of a roller of a roller sluice.

It is the schematic diagram which showed the state of the water gate of the interruption | blocking state in 1st and 2nd embodiment of this invention in the state which deleted the support body of one side. FIG. 2 is a sectional view taken along line 400-400 in FIG. 1. It is a rear view of the water gate main body in the 1st and 2nd embodiment of the present invention. It is a side view of the floodgate body in the first embodiment of the present invention. It is the figure which showed the non-contact sensor periphery in 1st Embodiment of this invention. It is the figure which showed the roller periphery in 1st Embodiment of this invention. FIG. 6 is a diagram for explaining a force T required to raise the water gate main body in the contact state or the non-contact state in the water gate according to the first embodiment of the present invention. FIG. 6 is a diagram for explaining a relationship between a rotation state of a roller and a detection signal model in the floodgate according to the first embodiment of the present invention. It is the figure which showed the control flow of the control part in the water gate by 1st Embodiment of this invention. It is a rear view of the water gate main body in the modification of 1st Embodiment of this invention. FIG. 11 is a sectional view taken along the line 410-410 in FIG. 10. It is the figure which showed the non-contact sensor periphery in the modification of 1st Embodiment of this invention. FIG. 11 is a diagram showing a detection signal model in the case of aged deterioration in the floodgate according to the second embodiment of the present invention. FIG. 16 is a diagram showing a detection signal model in the case of a sudden non-rotating state in the floodgate according to the second embodiment of the present invention. FIG. 11 is a diagram showing a detection signal model in the case of sudden sticking in the floodgate according to the second embodiment of the present invention.

  Embodiments embodying the present invention will be described below with reference to the drawings.

[First Embodiment]
<Composition of floodgates>
First, a sluice gate 100 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 8. The floodgate 100 is an example of the "roller floodgate" in the claims.

  As shown in FIG. 1, the floodgate 100 according to the first embodiment of the present invention is installed in a dam and a weir, and has a function of opening or blocking the flow of dammed water.

  The floodgate 100 includes a support body 1, a floodgate body 2, a lifting device 3, and a control panel 4. The support columns 1 form a part of a dam or a weir, and are arranged at predetermined intervals in the X direction (see FIG. 2). The water gate body 2 is arranged between the pair of pillar bodies 1. The elevating device 3 has a function of supplying power for elevating the sluice main body 2 in the vertical direction (Z direction). The control panel 4 is a device for performing lifting control of the sluice main body 2 and the like, and is arranged in the monitoring room 5. The monitoring chamber 5 may be installed in the vicinity of the support pillar 1 and the sluice gate body 2, or may be installed in a position apart from the support pillar 1 and the sluice gate body 2. The sluice gate 100 includes a water level detection unit 6a that detects the water level on the upstream side (Y1 side) of the sluice main body 2, an opening degree detection unit 6b that detects the opening degree (elevation degree) of the sluice main body 2, and And an amplifier 6c for outputting a detection signal for The vertical direction is an example of the "elevating direction" in the claims.

  In the floodgate 100, the flow of water is released by moving (raising) the floodgate main body 2 upward in the vertical direction (Z1 direction). In the floodgate 100, the flow of water is blocked by moving (falling) the floodgate main body 2 downward in the vertical direction (Z2 direction). Note that the upstream (Y1 side) surface of the sluice main body 2 is the front surface, and the downstream (Y2 side) surface of the sluice main body 2 is the rear surface. That is, water pressure is applied to the water gate body 2 in the Y2 direction by the dammed water.

  The pillar body 1 is formed so as to extend in the Z direction. A guide groove 11 is formed on the side of the water gate main body 2 of the support column 1. The guide groove 11 is formed so as to extend along the Z direction. In addition, as shown in FIG. 2, the guide groove 11 has a rectangular cross section on a horizontal plane (XY plane).

  A pair of door stoppers 12 are embedded in the pillar body 1 so that a part of the guide groove 11 is exposed on the inner side surface thereof. The pair of door stops 12 are arranged on both sides of the guide groove 11 in the Y direction. The door stop 12 is made of a metal material whose cross-sectional shape in the horizontal plane is H-shaped. The exposed surface 12a of the door stop 12 is exposed along the inner side surface of the guide groove 11. The door stop 12 is formed so as to extend in the Z direction together with the guide groove 11. As a result, the exposed surface 12a of the door stop 12 is exposed along the Z direction. It should be noted that the door stop 12 on the Y1 side may not be provided, and only the door stop 12 on the Y2 side with which the roller 21 described later mainly contacts may be provided.

  As shown in FIG. 1, the lifting device 3 includes a wire 3a, a winding machine 3b that winds the wire 3a, and a pulley portion 3c provided in the sluice gate body 2. The wire 3a extends in the Z direction. The wire 3a connects the hoist 3b and the pulley 3c. The hoist 3b is arranged above the sluice main body 2 (Z1 side), and raises the sluice main body 2 via the pulley 3c by winding the wire 3a in the Z direction. The hoist 3b lowers the water gate main body 2 via the pulley 3c by feeding the wire 3a in the Z direction.

  As shown in FIG. 3, the water gate main body 2 has a substantially rectangular shape when viewed from the Y direction, and as shown in FIGS. 2 and 4, is formed to have a trapezoidal cross section in a horizontal plane. As shown in FIG. 2, the water gate main body 2 is formed so as to be slightly longer in the X direction than the length in the X direction between the pair of pillars 1. As a result, both side ends (side ends 2a and 2b) of the water gate body 2 in the X direction are arranged inside the guide groove 11.

  Four rollers 21 (21a to 21d) are attached to the water gate body 2. As shown in FIGS. 3 and 4, the two rollers 21a and 21b are attached to the side end 2a of the sluice gate body 2 on the X2 side. Similarly, the two rollers 21c and 21d are attached to the side end portion 2b of the sluice gate body 2 on the X1 side, as shown in FIG. The rollers 21a and 21c are attached at substantially the same height position in the Z direction, and the rollers 21b and 21d are attached at substantially the same height position in the Z direction. The rollers 21a and 21c are attached on the Z1 side of the center of the sluice gate 2 in the Z direction, and the rollers 21b and 21d are attached near the lower end of the sluice main body 2 in the Z direction.

  The roller 21 is rotatably supported by a roller shaft 23 via a roller bearing 22. The roller shafts 23 of the rollers 21a and 21b protrude in the X2 direction from the side end portion 2a of the water gate body 2. The roller shafts 23 of the rollers 21c and 21d project from the side end portion 2b of the water gate body 2 in the X1 direction.

  The roller 21 has a disk shape having circular flat surfaces on both sides in the X direction. In addition, as shown in FIG. 2, the roller 21 is attached so that the roller 21 can contact the exposed surface 12a of the door stop 12 in the X direction.

  The roller 21 has a diameter D on the surface in the X direction. Here, the diameter D of the roller 21 is slightly smaller than the width W of the guide groove 11 in the Y direction. As a result, the roller 21 does not come into contact with the state (contact state) in which the roller 21 comes into contact with the surface 12a of the door stop 12 depending on the magnitude of the pressing force acting on the water gate body 2 by the dammed water. It is configured to be switched to a state (non-contact state).

  Specifically, the roller 21 does not contact the surface 12 a of the door stop 12 when the water pressure (pressing force) equal to or higher than a predetermined water pressure is not applied to the water gate body 2. In this case, the water gate body 2 is moved up and down by the lifting device 3 regardless of the rotation state of the roller 21.

  On the other hand, when a water pressure (pressing force) equal to or higher than a predetermined water pressure is applied to the water gate body 2, the outer peripheral surface of the roller 21 contacts the surface 12 a of the door stop 12. Accordingly, when the water gate main body 2 is moved up and down, the water gate main body 2 can be moved up and down while rotating the roller 21 while the roller 21 is in contact with the surface 12a of the door stop 12. As a result, the frictional force between the sluice body 2 and the strut body 1 becomes smaller than when the sluice body 2 directly contacts the inner surface of the guide groove 11, so that the sluice body 2 is moved up and down with a smaller force. It is possible to

  Here, in the first embodiment, as shown in FIG. 3, the water gate 100 includes four non-contact sensors 25 that detect the respective rotation states of the four rollers 21 (21a to 21d). The rollers 21a to 21d have substantially the same configuration of the non-contact sensor 25 corresponding to the rollers 21a to 21d. The non-contact sensor 25 is an example of the "detection unit" in the claims.

  As shown in FIG. 5, the non-contact sensor 25 has twelve magnets 25a (see FIG. 6) attached to the roller 21 and a magnetic sensor 25b whose inductance decreases as the magnets 25a approach each other. That is, the non-contact sensor 25 is a magnetic sensor that can detect the rotation of the roller 21 in a non-contact manner. The amplifier 6c monitors the inductance of the magnetic sensor 25b. Further, the amplifier 6c is configured to output a detection signal (ON or OFF) to the control panel 4 when the decrease in the inductance due to the approach of the magnet 25a to the magnetic sensor 25b exceeds a predetermined threshold value. There is. The magnet 25a is an example of the "magnetic material" in the claims.

  The magnet 25a is attached to the circular surface of the roller 21 on the side opposite to the water gate body 2. Further, as shown in FIG. 6, the twelve magnets 25a are attached on the surface of the roller 21 on substantially concentric circles at substantially equal angular intervals.

  As shown in FIG. 5, the magnetic sensor 25b is arranged at a position facing the magnet 25a in the X direction by a bracket 26 fixed to the side end 2a or 2b of the water gate body 2. That is, the magnetic sensor 25b is attached to the water gate body 2. Specifically, the bracket 26 is fixed so as to project in the X direction in the side end portion 2a or 2b of the sluice main body 2 in the vicinity of immediately above the roller 21. The bracket 26 is bent downward (Z2 side) on the side opposite to the sluice main body 2 with respect to the surface of the roller 21 opposite to the sluice main body 2. The magnetic sensor 25b is arranged at the end of the bracket 26 that is bent downward in a state of penetrating in the X direction. The magnet 25a and the magnetic sensor 25b are arranged apart from each other in the X direction by a distance L at which the magnetic sensor 25b can detect the approach of the magnet 25a with sufficient detection sensitivity.

  As a result, in the non-contact sensor 25, the positional relationship between the twelve magnets 25a of the roller 21 and the magnetic sensor 25b is changed by the rotation of the roller 21. Thus, the non-contact sensor 25 is configured to detect the rotation state of the roller 21 from the X direction.

<Explanation of roller sticking>
Here, in the roller 21, rust, foreign matter, and the like are located between the roller 21 and the roller bearing 22 due to deterioration over time. In this case, the roller 21 and the roller bearing 22 stick to each other. At this time, due to the roller 21 not rotating normally, a large load may be applied to the elevating device 3 when elevating the sluice main body 2.

  As an example, a case of raising the water gate body 2 will be described. When the water pressure (see FIG. 1) is small and the roller 21 is not in contact with the door stop 12 (non-contact state) as shown in FIG. 7A, the water gate main body 2 is raised regardless of the rotation state of the roller 21. The force T0 (N) required to cause this does not include the frictional force due to the contact between the roller 21 and the door stop 12.

On the other hand, in the state shown in FIGS. 7B to 7D in which the water pressure is sufficiently large and the roller 21 contacts the door stop 12 (contact state), there are three states depending on the rotation state of the roller 21. Be divided. First, FIG. 7B shows a state (an ideal state) in which the roller 21 and the roller bearing 22 are not fixed to each other and the roller 21 normally rotates in a state of contacting the door stop 12. . In the ideal state, in addition to the force T1 (N) required to raise the sluice main body 2, as the frictional force, the rolling frictional force F1a (N) of the roller 21 and the sliding frictional force F2a (N) of the roller 21 and the roller bearing 22 are used. ) And are included. Here, the radius of the roller 21 is R (= D / 2, see FIG. 2), the radius of the roller shaft 23 is r (= d / 2, see FIG. 2), and the roller 21 causes the support body 1 (door The pressing force applied to the contact 12) is P. Further, the rolling friction coefficient of the roller 21 is μ1a, and the sliding friction coefficient between the roller 21 and the roller bearing 22 is μ2a. In this case, F1a and F2a are calculated by the following equations (1) and (2), respectively.
F1a = μ1a × P / R ... (1)
F2a = r × μ2a × P / R ... (2)

  Next, FIG. 7 (c) shows a state in which the roller 21 and the roller bearing 22 are rotatable but the fixation is progressing and is difficult to rotate due to deterioration over time (adhesion progress state). In the adhering state, the coefficient of sliding friction between the roller 21 and the roller bearing 22 increases from μ2a to μ2b as compared with the ideal state. Therefore, the sliding friction force F2b (N) between the roller 21 and the roller bearing 22 becomes larger than the ideal sliding friction force F2a (N), and the force T2 (N) required to raise the sluice main body 2 is It becomes larger than T1.

  Next, a state in which the roller 21 and the roller bearing 22 are completely fixed (completely fixed state) due to further deterioration over time shown in FIG. 7D is shown. In the completely fixed state, unlike the ideal state, slippage between the roller 21 and the roller bearing 22 does not occur. Further, the water gate main body 2 rises in a state where the roller 21 is dragged against the door stop 12 without rotating. At this time, the contact friction coefficient μ1b of the roller 21 is much larger than the rolling friction coefficient μ1a of the roller 21 in the ideal state. As a result, the force T3 (N) required to raise the water gate body 2 becomes larger than T1 and T2. If T3 becomes excessively large in this way, a large load is applied to the lifting device 3, and the wear of the wire 3a and the trouble of the hoisting machine 3b are likely to occur.

  Therefore, in the water gate 100 of the first embodiment, by detecting the rotation state of the roller 21, the abnormal state (fixed state) of the roller 21 is grasped before the force required to raise the water gate body 2 becomes excessively large. Then, it is possible to perform repairs. Further, in the sluice gate 100, by detecting the rotation state of the roller 21, it is possible to suppress the roller 21 from being dragged without rotating with respect to the door stop 12, so that the door stop 12 may be damaged. It is possible to suppress.

  Furthermore, in the water gate 100 of the first embodiment, unlike the case where the rotation state of the roller 21 is indirectly estimated from the current value applied to the hoist 3b of the lifting device 3 by detecting the rotation state of the roller 21, It is possible to reliably detect the rotation state of the roller 21 without being affected by a defect on the lifting device 3 side such as a defect on the hoist 3b.

  Further, as shown in FIGS. 3 and 5, the non-contact sensors 25 corresponding to the rollers 21a to 21d are connected to the cables 27a to 27d, respectively. Then, as shown in FIGS. 3 and 4, the cables 27a and 27b are combined into a single connecting cable 28b by the junction box 28a provided at the side end portion 2a of the sluice gate body 2. Then, the connecting cable 28b is wound or sent out by the cable reel 28c provided on the support column 1 in accordance with the elevation of the sluice main body 2, thereby suppressing the occurrence of slack. As a result, it is possible to prevent the cables 27a and 27b and the connecting cable 28b from being entangled in the sluice main body 2 due to the slack, so that the cables 27a and 27b and the connecting cable 28b are prevented from being damaged by the sluice main body 2. It is possible to suppress.

  Further, a cable clip 28d is arranged between the junction box 28a and the cable reel 28c. The cable clip 28d can suppress the tension applied to the cables 27a and 27b and the connecting cable 28b, thereby suppressing the tension applied to the connecting portion between the magnetic sensor 25b and the cables 27a and 27b. is there. The cable clip 28d is arranged on the upper part of the sluice main body 2. Further, the connecting cable 28b is connected to the control panel 4 (see FIG. 1) via the amplifier 6c (see FIG. 1).

  Similarly, the cables 27c and 27d are put together into one connecting cable 29b by the junction box 29a provided at the side end portion 2b of the sluice gate body 2 as shown in FIG. Then, the connecting cable 29b is connected to the control panel 4 via a cable reel 29c provided on the column body 1, a cable clip 29d arranged on the upper part of the floodgate body 2 and an amplifier 6c.

  As shown in FIG. 2, a watertight rubber 2c for ensuring watertightness is attached to the front surface (surface on the Y1 side) of the water gate body 2. The watertight rubber 2c is attached to the end of the protrusion 2d. As shown in FIG. 4, the watertight rubber 2c is formed along the Z direction of the sluice main body 2 at both end portions in the X direction of the sluice main body 2 over substantially the entire Z direction. At the lower end of the Z2 side of No. 2, it is formed over substantially the entire X direction. As a result, the watertight rubber 2c is formed in a U shape in the water gate body 2. Further, as shown in FIG. 2, the watertight rubber 2c abuts on the support column 1 on the Y1 side of the guide groove 11 at both ends in the X direction of the sluice main body 2 to thereby guide the guide groove 11 and the guide groove 11 together. Water is suppressed from leaking to the Y2 side. Thereby, it is possible to dam the water by the water gate body 2.

  As shown in FIGS. 2 and 3, four auxiliary rollers 2e are attached to the rear surface (surface on the Y2 side) of the water gate body 2. The four auxiliary rollers 2e are respectively attached to the protrusions 2f that protrude in the Y2 direction from the vicinity of the rollers 21a to 21d. The auxiliary roller 2e has a role of restricting the movement of the sluice main body 2 in the X direction by rotatably contacting the support column 1 on the Y2 side of the guide groove 11.

  As shown in FIG. 1, the control panel 4 includes a control unit 4a, a storage unit 4b, a notification unit 4c, and an operation unit 4d. The control unit 4a is configured to perform overall control of the floodgate 100, such as control of the lifting device 3. The storage unit 4b stores a program executed by the control unit 4a and the like. The notification unit 4c has a monitor, a speaker, and the like, and has a function of notifying an observer in the monitoring room 5 (an example of a “user” in the claims) with information about the floodgate 100. The operation unit 4d is configured to receive an operation input regarding the sluice gate 100 from an observer in the monitoring room 5. The control panel 4 is configured to control the lifting device 3 and the like based on an input to the operation unit 4d.

<Control by control unit>
The control unit 4a of the control panel 4 is configured to perform control related to detection of the rotation state of the roller 21. Specifically, the control unit 4a, based on the water level of the water acquired from the water level detection unit 6a and the opening degree of the floodgate body 2 acquired from the opening degree detection unit 6b, the submerged depth of the floodgate body 2 (the floodgate body). 2 is configured to calculate the depth from the water surface at a predetermined position. The control unit 4a is configured to calculate the water pressure acting on the sluice main body 2 from the submerged depth of the sluice main body 2, thereby calculating the pressing force acting on the sluice main body 2 by the dammed water. .

  Then, the control unit 4a causes the roller 21 to contact the surface 12a of the door stop 12 exposed on the inner side surface of the guide groove 11 on the Y2 side (contact state), based on the pressing force applied to the sluice main body 2. It is configured to determine whether or not it is in a non-contact state (non-contact state).

  Then, in the first embodiment, the control unit 4a, in the contact state, detects the detection signal based on the switching of the detection signal transmitted from the amplifier 6c according to the decrease in the inductance of the non-contact sensor 25 (magnetic sensor 25b). It is configured to create a model. Specifically, in the ideal state immediately after completion or repair, the control unit 4a creates a detection signal model as shown in FIG. 8 (a). In this detection signal model, the detection signal is detected 12 times at the same time interval during the predetermined time C0. That is, this detection signal model indicates that the roller 21 makes one rotation during the predetermined time C0 (rotation cycle).

  In a state in which the fixing is slightly advanced (adhering state (initial)), the control unit 4a creates a detection signal model as shown in FIG. 8 (b). In this detection signal model, the detection signal is detected less than 12 times (8 times in FIG. 7B) at substantially the same time interval during the predetermined time C0. That is, this detection signal model indicates that the roller 21 rotates by a predetermined rotation angle of less than one rotation during the predetermined time C0. The shape of this detection signal model is due to the roller 21 mainly rotating while sliding on the door stop 12. Note that the slip has little effect on the detection time interval.

  In a state where the fixation has progressed considerably (adhesion progress state (end stage)), the control unit 4a creates a detection signal model as shown in FIG. 8C. In this detection signal model, the detection signal is detected less than 12 times during the predetermined time C0. Also, the intervals at which the detection signals are switched are irregular. That is, this detection signal model indicates that the roller 21 rotates by a predetermined rotation angle of less than one rotation during the predetermined time C0. At this time, the rotation angle in the final stage of the adhering state is smaller than the rotation angle in the initial state of the adhering state. The shape of this detection signal model is due to the roller 21 mainly sliding on the door stop 12 while rotating. Further, due to the slippage, the switching intervals of the detection signals become irregular.

  In the completely fixed state (completely fixed state), the control unit 4a creates a detection signal model as shown in FIG. 8 (d). In this detection signal model, the detection signal continues to be detected or is not detected at all during the predetermined time C0. That is, in this detection signal model, the roller 21 of the roller 21 does not rotate during the predetermined time C0.

  The control unit 4a is configured to store the detection signal model created for each of the rollers 21a to 21d in the storage unit 4b.

  In addition, in the first embodiment, the control unit 4a determines the rotation state of the roller 21 based on the detection signal model newly created and stored in the storage unit 4b in each of the four rollers 21a to 21d. It is configured to determine whether the rotation is in the permissible rotation state or not. At this time, the control unit 4a compares the detection signal model in the ideal state with the newly created detection signal model to determine whether the rotation state of the roller 21 is the permissible rotation state or not the permissible rotation state. It is configured to judge whether or not. For example, when the rotation angle of the roller during the predetermined time C0 is less than or equal to the predetermined angle (that is, when the number of detection signals during the predetermined time C0 is less than or equal to the predetermined number), the control unit 4a determines. The roller 21 is configured to determine that the rotation state is not the allowable rotation state. In this case, as the ideal detection signal model used, it is preferable to use the detection signal model when the submersion depth is sufficiently large.

  Then, if any of the four rollers 21a to 21d is not in the permissible rotation state, the control unit 4a allows the observer to rotate the predetermined roller 21 in the four rollers 21a to 21d. It is a rotation state different from the state, and is configured to control the notification unit 4c so as to notify that there is an abnormality. The notification may be performed by displaying a warning indicating an abnormality on the monitor of the notification unit 4c, or by outputting a warning indicating an abnormality from the speaker of the notification unit 4c as voice. May be done. By this notification, the observer can know that the abnormal roller 21 needs to be repaired or replaced without directly inspecting it by visual inspection or palpation.

  Further, the control unit 4a is configured to display the detection signal model of each of the rollers 21a to 21d on the monitor of the notification unit 4c. Thereby, the monitoring staff can judge by himself / herself whether or not the predetermined roller 21 among the four rollers 21a to 21d is in the permissible rotation state based on the displayed detection signal model.

<Control flow>
Next, with reference to FIG. 9, a control flow regarding the rotation state of the roller 21 by the control unit 4a of the control panel 4 in the first embodiment will be described. It should be noted that this control is performed for each of the four rollers 21a to 21d when the water gate main body 2 is moved up and down.

  First, in step S1, the controller 4a determines whether the roller 21 is in contact with the front surface 12a of the door stop 12 (contact state) or not in contact (non-contact state). To be done. If it is in the non-contact state, the control by the control unit 4a ends. In the contact state, in step S2, the control unit 4a creates a detection signal model and stores it in the storage unit 4b.

  In step S3, the control unit 4a determines, based on the detection signal model, whether the rotation state of the roller 21 is the allowable rotation state or the allowable rotation state. If it is not in the permissible rotation state, in step S4, the control unit 4a informs the monitor that the rotation state of the roller 21 is abnormal as a warning and displays the detection signal model on the monitor. Then, the control by the control unit 4a is ended. If it is in the permissible rotation state, in step S5, the warning is not notified to the monitoring person, and the detection signal model is displayed on the monitor by the control unit 4a. Then, the control by the control unit 4a is ended.

<Effects of First Embodiment>
In the first embodiment, the following effects can be obtained.

  In the first embodiment, as described above, the non-contact sensor 25 that detects the rotation state of the roller 21 as the water gate main body 2 moves up and down is provided in the water gate 100. Thus, the rotation state of the roller 21 can be easily confirmed by the non-contact sensor 25 without directly inspecting the roller 21 by visual inspection or touch. As a result, the control unit 4a can easily determine whether or not there is a problem regarding the rotation state of the roller 21.

  In addition, in the first embodiment, the water gate 100 is provided with the non-contact sensor 25 that detects the rotation state of the roller 21 in a non-contact manner. As a result, unlike the case where the rotation state of the roller 21 is detected by using the contact sensor, even if some foreign matter adheres to the non-contact sensor 25, the non-contact sensor 25 can continue to detect the rotation state of the roller 21. it can. As a result, it is possible to prevent the rotation state of the roller 21 from becoming undetectable due to the surrounding environment of the roller 21.

  In addition, in the first embodiment, the non-contact sensor 25 has a magnet 25a attached to the roller 21 of the roller 21 and a magnetic sensor 25b attached to the sluice main body 2 and capable of detecting the approach of the magnet 25a. Accordingly, the rotation state of the roller 21 can be detected based on the approach of the magnet 25a due to the rotation of the roller 21. Further, since the magnetic field is less likely to be blocked by the foreign matter as compared with the case of non-contact detection by light, it is possible to reliably prevent the rotation state of the roller 21 from being undetectable due to the surrounding environment of the roller 21. .

  Further, in the first embodiment, the non-contact sensor 25 is provided on each of the plurality of rollers 21. Accordingly, even if any of the plurality of rollers 21a to 21d has a problem in the rotating state, the defect in the rotating state of the roller 21 can be easily and surely confirmed.

  Further, in the first embodiment, the water gate 100 is provided with the notification unit 4c for notifying the user (monitor) when the rotation state of the roller 21 when the water gate body 2 is lifted is different from the allowable rotation state of the roller 21. This allows the monitoring staff to immediately recognize that the rotation state of the roller 21 is defective through the notification unit 4c.

[Modification of First Embodiment]
Next, with reference to FIGS. 10 to 12, a floodgate 200 according to a modified example of the first embodiment of the present invention will be described. In the floodgate 200 according to the modified example of the first embodiment, the mounting position of the non-contact sensor in the first embodiment is different. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof is omitted. The floodgate 200 is an example of the "roller floodgate" in the claims.

  In the modified example of the first embodiment, as shown in FIGS. 10 and 11, a rear surface of the sluice main body 102 has a pair of flanges and a web connecting the pair of flanges and extending in the X direction. 102 g of H-shaped steel is arranged. A pair of drain holes 102h are formed in the vicinity of both ends in the X direction of the H-shaped steel 102g to vertically penetrate the web of the H-shaped steel 102g.

  Further, as shown in FIG. 12, the water gate body 102 is provided with four through holes 102i. Two of the four through holes 102i are formed at the side end 102a on the X2 side, and the remaining two are formed at the side end 102b on the X1 side. The through holes 102i are provided at height positions near the upper ends of the rollers 21a to 21d in the Z direction.

  The water gate main body 102 is provided with four non-contact sensors 125 that detect the rotational states of the rollers 21a to 21d. The non-contact sensor 125 has twelve magnets 125a attached to the surface of the roller 21 on the side of the water gate body 102, and a magnetic sensor 125b. Further, the twelve magnets 125a are attached on the surface of the roller 21 on substantially concentric circles at substantially equal angular intervals. The magnetic sensor 125b is fixed by the bracket 126 while being inserted into the through hole 202g. The magnet 125a and the magnetic sensor 125b are arranged apart from each other in the X direction by a distance L at which the magnetic sensor 125b can detect the approach of the magnet 125a with sufficient detection sensitivity. Accordingly, the non-contact sensor 125 is configured to detect the rotation state of the roller 21 from the X direction. The magnet 125a is an example of the "magnetic material" in the claims.

  Further, the non-contact sensors 125 corresponding to the rollers 21a to 21d are connected to the cables 127a to 127d, respectively. The cables 127a to 127d are laid on the side of the sluice main body 102 rather than the side end portion 102a or 102b of the sluice main body 102. At this time, the cables 127b and 127d are laid so as to pass through the water drain holes 102h provided in the H-shaped steel 102g. As a result, it is possible to prevent the cables 127b and 127d from being damaged as compared with the case where the H2 steel 102g is crawled on the Y2 side.

  The cables 127a and 127b are put together into a single connecting cable 128b by the junction box 128a provided on the rear surface of the sluice main body 102. Similarly, the cables 127c and 127d are combined into one connection cable 129b by the junction box 129a provided on the rear surface of the sluice main body 102. The other configurations and effects of the modification of the first embodiment are similar to those of the first embodiment.

[Second Embodiment]
Next, a sluice gate 300 according to a second embodiment of the present invention will be described with reference to FIGS. 1, 3 and 13 to 15. In the sluice gate 300 according to the second embodiment, unlike the first embodiment, the control unit 204a compares the rotation states of the four rollers 21a to 21d with each other, and compares them with the past rotation states of the rollers 21a to 21d. It compares various rotating states in time series. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof is omitted. The floodgate 300 is an example of the "roller floodgate" in the claims.

  As shown in FIG. 1, the floodgate 300 includes a control panel 204 including a control unit 204a instead of the control panel 4 of the first embodiment including the control unit 4a. The rest of the configuration of the second embodiment is similar to that of the first embodiment.

  The control unit 204a creates the detection signal model based on the detection signal transmitted from the amplifier 6c according to the decrease in the inductance of the non-contact sensor 25 (magnetic sensor 25b) provided in each of the plurality of rollers 21. Is configured. Then, the control unit 204a is configured to compare the detection signal models corresponding to the four rollers 21a to 21d with each other by using the created detection signal model. In addition, the control unit 204a is configured to compare the past detection signal model of the four rollers 21a to 21d with the new detection signal model in time series using the created detection signal model. . The controller 204a is configured to determine the rotation state of each of the four rollers 21a to 21d by performing these comparisons.

  Specific determinations by the control unit 204a will be described using the examples shown in FIGS. 13 to 15. In the example of aging deterioration shown in FIG. 13, the detection signal model of each of the rollers 21a to 21d is substantially the same detection signal model before the previous time (at the time of completion), the previous time, and the current time. In addition, the detection signal model of each of the rollers 21a to 21d is substantially the same as the detection signal model of each of the rollers 21a to 21d both before, last time, and this time. Further, when the detection signal models of the rollers 21a to 21d are compared in time series, the detection signal switching interval is gradually increased and the detection signal switching is irregular according to the time before last, the previous time, and this time. It has become. In such a case, the control unit 204a is configured to determine that the fixation of the rollers 21a to 21d has progressed in each due to deterioration over time. In this case, the control unit 204a gives a notification via the notification unit 4c that all the rollers 21a to 21d should be repaired or replaced this time.

  In the example of the sudden non-rotating state shown in FIG. 14, the detection signal models of the rollers 21a, 21c, and 21d are almost the same before the previous time, the previous time, and the present time, and a large amount of sticking is observed. Absent. On the other hand, in the roller 21b, the detection signal model similar to the other rollers 21a, 21c and 21d is used in the previous two times, but unlike the other rollers 21a, 21c and 21d in the previous time, a detection indicating a large fixation (complete fixation) is detected. The signal model was confirmed. However, this time, the detection signal model similar to the other rollers 21a, 21c, and 21d was confirmed again. In such a case, the control unit 204a determines that foreign matter or the like is caught in the roller 21b and is temporarily fixed, but is resolved this time and returns to the same rotation state as the other rollers 21a, 21c, and 21d. Is configured to. In this case, the control unit 204a does not notify that repair or replacement should be performed. Accordingly, it is possible to prevent the roller 21b from being erroneously determined to be abnormal and being repaired or replaced despite the temporary non-rotation state.

  In the example of the sudden adhesion state shown in FIG. 15, the detection signal models of the rollers 21a, 21c, and 21d are substantially similar to each other both before the previous time, the previous time, and this time, and significant adhesion is not observed. . On the other hand, the roller 21b has the same detection signal model as the other rollers 21a, 21c, and 21d in the previous two times, but unlike the other rollers 21a, 21c, and 21d in the previous time and this time, a large fixation (complete fixation). The detection signal model showing is confirmed. In such a case, the control unit 204a is configured to determine that only the roller 21b is in the non-recoverable fixed state based on the confirmation of the detection signal model indicating the complete fixed state continuously. ing. In this case, the control unit 204a gives a notification via the notification unit 4c that the repair or replacement should be performed on the roller 21b this time.

<Effects of Second Embodiment>
In the second embodiment, the following effects can be obtained.

  In the second embodiment, as described above, the non-contact sensor 25 is provided on each of the plurality of rollers 21a to 21d. This allows the control unit 204a to compare the rotational states of the plurality of rollers 21a to 21d. Therefore, based on the discrepancy between the rotational state of the other roller 21 and the rotational state of the roller 21, the rotational state of the roller 21 is changed. The defect can be detected early. The other effects of the second embodiment are similar to those of the first embodiment.

[Modification]
The embodiments disclosed this time are to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of the claims, and further includes meanings equivalent to the scope of the claims and all modifications (modifications) within the scope.

  For example, in the said 1st and 2nd embodiment, the example which the water gate main body 2 (102) raises / lowers in the perpendicular direction was shown, but this invention is not restricted to this. In the present invention, the sluice gate body may be configured to move up and down in an inclination direction other than the vertical direction.

  In the first and second embodiments, the magnetic sensor 25b (125b) whose inductance decreases due to the approach of the magnet 25a (125a) is used as the magnetic sensor of the non-contact sensor 25 (125). However, the present invention is not limited to this. In the present invention, a magnetic sensor for detecting the approach of the magnet may be used by a method other than the reduction of the inductance. For example, a magnetic sensor that detects the approach of the magnet by detecting the magnitude of the magnetic field or the contact of the reed switch may be used.

  Further, in the first and second embodiments, the example in which the magnetic non-contact sensor 25 (125) capable of detecting the rotation of the roller 21 by non-contact is used is shown, but the present invention is not limited to this. . In the present invention, as the non-contact sensor capable of detecting the rotation of the roller by non-contact, a high-frequency transmission type, capacitance type, inductive type, ultrasonic type, or photoelectric type non-contact sensor other than the magnetic type is used. May be.

  In the first and second embodiments, the non-contact sensor 25 (125) that detects the rotation of the roller 21 by non-contact is used as the "detection unit" in the claims, but the present invention is not limited to this. Is not limited to this. In the present invention, a sensor that detects the rotation of the roller by contact instead of non-contact may be used as the "detector" in the claims. For example, a roller lever type limit switch, a non-contact touch switch, a touch switch, a capacitance type touch sensor, or a spring sensor may be used.

  In the first and second embodiments, the non-contact sensor 25 (125) is configured to detect the rotation state of the roller 21 from the X direction (thickness direction of the roller 21). The present invention is not limited to this. In the present invention, the non-contact sensor may be configured to detect the rotation state of the roller 21 from the radial direction of the roller 21. In this case, for example, the magnet is arranged on the outer peripheral surface of the roller body.

  In the first and second embodiments, an example is shown in which the detection signal from the non-contact sensor 25 (125) is transmitted to the control panel 4 via the cable wire-connected to the magnetic sensor 25b (125b). However, the present invention is not limited to this. In the present invention, the detection signal from the non-contact sensor may be wirelessly or mechanically transmitted to the control panel.

  Further, in the first and second embodiments, the example in which the cable is wound by using the cable reels 28c and 29c has been shown, but the present invention is not limited to this. In the present invention, the cable may be wound by a type other than the cable reel. Further, in the present invention, the sluice may be configured by a method in which the cable is not wound (a so-called natural method).

  Further, in the first and second embodiments, the example in which the two cables are wound up by the cable reel in a state where the two cables are combined into one connection cable by the junction box has been shown, but the present invention is not limited to this. Absent. In the present invention, the two cables are not wound together by the cable reel in a state of being collected into one cable, but the two cables are wound by the cable reel without being collected into one cable. You may.

  Moreover, in the said 1st and 2nd embodiment, the control part 4a (204a) calculates the submersion depth of the sluice main body 2 based on the detection result of the water level detection part 6a and the opening degree detection part 6b, and the sluice main part. An example of determining whether the sluice gate body 2 is in the contact state or the non-contact state by calculating the pressing force acting on the sluice gate body 2 from the submerged depth of 2 has been shown. Is not limited to this. In the present invention, the tension of the wire of the lifting device, or from the current value applied to the hoist of the lifting device, the pressing force acting on the sluice body may be obtained, or by detecting the bending of the roller shaft, The pressing force acting on the sluice body may be acquired. Further, by monitoring the contact between the roller and the door stop with a gap sensor or a camera, it is possible to detect whether the water gate body is in the contact state or the non-contact state. Good. Further, it is not necessary for the control unit to determine whether or not the water gate body is in the contact state. That is, the control unit may be configured to determine whether or not there is a defect in the guide roller roller based only on the rotation state of the roller.

  In the first and second embodiments, the control unit 4a (204a) determines that the rotation state of the roller 21 is based on the detection signal model newly created and stored in the storage unit 4b in the contact state. Although the example in which it is determined whether the rotation speed is the permissible rotation state or the non-permission rotation state is shown, the present invention is not limited to this. In the present invention, the degree of the contact state is determined based on the magnitude of the pressing force acting on the water gate body, and the criteria of whether the roller is in the permissible rotation state or not may be changed based on the degree of the contact state. Good. For example, when the pressing force (P in the above formula (1)) is small, the rolling frictional force for rotating the roller (F1a in the above formula (1)) becomes small, so it is considered that the roller becomes difficult to rotate. In this case, the control unit may be configured to include the state in which the roller is not rotating to some extent in the allowable rotation state.

  Moreover, in the said 1st and 2nd embodiment, although the example which displayed the detection signal model on the monitor of the alerting | reporting part 4c was shown, this invention is not restricted to this. In the present invention, the monitor of the notification unit may be configured to display the number of rotations of the roller for each predetermined time (for example, the rotation cycle in the ideal state and one minute).

  Further, in the first and second embodiments, the example in which the twelve magnets 25a (125a) (magnetic bodies) are attached to the roller 21 has been shown, but the present invention is not limited to this. In the present invention, the number of magnetic bodies is not particularly limited. That is, the number of magnets may be one, or may be a plurality other than twelve.

  In the first and second embodiments, an example in which twelve magnets 25a (125a) (magnetic bodies) are attached to the roller 21 and the magnetic sensor 25b (125b) is attached to the sluice main body 2 (102). However, the present invention is not limited to this. In the present invention, the magnetic body may be attached to the water gate body and the magnetic sensor may be attached to the roller.

  In addition, in the second embodiment, the control unit 204a compares the rotation states of the four rollers 21a to 21d with each other, and determines the past rotation state and the new rotation state of the rollers 21a to 21d in time series. Although an example of comparison is shown, the present invention is not limited to this. In the present invention, the control unit may perform only control for comparing the rotation states of the plurality of rollers with each other, or the control unit may time-series the past rotation state and the new rotation state of the plurality of rollers. Only the control for comparison may be performed.

  Further, in the above-described second embodiment, an example of aging deterioration, an example of a sudden non-rotation state, and an example of a sudden adhesion state are shown, but the present invention is not limited to this. In the present invention, the control unit may appropriately determine the rotation state of the roller according to other cases. In addition, the examples of aged deterioration, the sudden non-rotation state, and the example of the sudden fixed state shown in the second embodiment are examples, and the case other than the example shown in the second embodiment is controlled by the control unit. Therefore, it may be determined that the deterioration is due to aging, a sudden non-rotation state, or a sudden fixation state. Further, the control unit displays the detection signal models corresponding to each of the four rollers on the monitor of the notification unit in a comparable manner, and displays the past detection signal model and the new detection signal model of the four rollers. You may comprise so that even the control displayed in time series may be performed. That is, the observer may make the final determination of the rotation states of the four rollers.

  Further, in the above-described first and second embodiments, the example in which the roller type floodgate is installed in the dam and the weir has been shown, but the present invention is not limited to this. The present invention is also applicable to a roller sluice provided at a place other than a dam and a weir (for example, a harbor or a dock) as long as it is necessary to open or block the flow of water.

2,102 Sluice main body 12 per door 21, 21a, 21b, 21c, 21d roller 25, 125 non-contact sensor (detection unit)
25a, 125a Magnetic substance (magnet)
25b, 125b Magnetic sensor 100, 200, 300 Water gate (roller type water gate)

Claims (4)

A sluice body that moves up and down to open or block the flow of water,
A door stop extending in the up-and-down direction of the water gate body,
A roller provided in the water gate body, which rotates in contact with the door stop when the water gate body moves up and down,
A detector that detects the rotation state of the roller when the water gate body moves up and down,
A roller-type water gate configured to determine, based on a detection result of the detection unit, whether or not the rotation state of the roller when the water gate body is raised and lowered is an allowable rotation state of the roller.   The roller type water gate according to claim 1, wherein the detection unit includes a non-contact sensor that detects a rotation state of the roller in a non-contact manner.   The non-contact sensor is a magnetic body attached to either the roller or the sluice body, and a magnetic sensor attached to the other of the roller or the sluice body and capable of detecting the approach of the magnetic body. The roller-type sluice according to claim 2, comprising: Rotation of the roller, which is configured to open or block the flow of water by lifting and lowering, and rotates in contact with a door stop extending in the lifting direction of the sluice main body as the sluice main body provided with the rollers is lifted and lowered. A step of detecting the state,
Based on the detected rotation state of the roller, a step of determining whether the rotation state of the roller when the water gate body is being raised or lowered is an allowable rotation state of the roller, the rotation of the roller of the roller type water gate. State judgment method.

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