Floodgate opening / closing device

Abstract

To provide a floodgate opening / closing device that enables reduction in labor required for manual operation by motorization of a manual floodgate and remote operation, and facilitates installation work on existing floodgates.SOLUTION: The floodgate opening / closing device is configured such that a device body 10 is installed from above on a frame 5 of a floodgate 2 so that a nut member 6 of the floodgate 2 engages with an engagement hole 22 of a first pulley 20, and the device body 10 is fixed on the frame 5 by first and second fixing members 70, 80 so that the device body 10 is installed on the floodgate 2, thereby it is possible to easily install the floodgate opening / closing device on the existing floodgate 2 and the manual floodgate 2 can be motorized. Since the first pulley 20 which is rotatably supported by multiple guide rollers 30, a second pulley 50 which is provided on a drive unit 60, and a belt 40 that is wound around the first and second pulleys 20, 50 are mounted beforehand on the device body 10, there is no need to install or adjust the pulleys 20, 50 and the belt 40 at an installation site.SELECTED DRAWING: Figure 15

Description

[Technical field]

[0001] The present invention relates to a water gate opening and closing device for opening and closing a small water gate installed, for example, in an irrigation channel. [Background technology]

[0002] Generally, small water gates installed in irrigation channels and the like are equipped with a gate-shaped frame that supports a screw shaft attached to the gate body, and are configured so that the gate body is raised and lowered by rotating a nut member screwed onto the screw shaft with a handle. However, when opening and closing such manual water gates, the handle must be rotated by hand, and the opening and closing work requires a great deal of effort. In addition, manual water gates may cause delays in opening and closing work in emergencies, causing problems in adjusting the internal and external water levels, and may result in insufficient response to disaster prevention and mitigation. Furthermore, in an emergency, it is not desirable for people to approach irrigation channels and the like to open and close the gate with a manual handle in order to prevent water accidents caused by rising water levels, etc.

[0003] In addition, a device that automatically opens and closes an existing manually operated floodgate is known in which a pulley is attached to the nut member of the floodgate and the pulley is driven by a motor via a belt to rotate the nut member and raise and lower the gate body (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2000-17638 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the conventional water gate drive device, a dedicated sleeve is attached to the nut member of the existing water gate, and the pulley is directly attached to the sleeve, so the work of connecting the pulley on the sleeve side and the pulley on the motor side via a belt must be done on-site, which makes the installation work on-site complicated. In particular, the work of adjusting the pulley position is required to adjust the tension of the belt between each pulley, which makes the installation work on-site even more complicated.

[0006] The present invention has been made in consideration of the above-mentioned problems, and its purpose is to provide a floodgate opening and closing device that can reduce the labor required by electrifying a manual floodgate and enable remote operation, while also allowing for easy installation on an existing floodgate. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the present invention provides a watergate opening and closing device that is installed on a watergate having a gate-shaped frame that supports a screw shaft attached to a gate body, and raises and lowers the gate body by rotating a nut member that screws onto the screw shaft.The device comprises a device main body that is installed on the frame of the watergate, a first pulley that has an engagement hole that can engage with the nut member and can rotate together with the nut member, a plurality of guide rollers that are arranged at intervals around the first pulley and abut radially against the outer surface side of the first pulley to rotatably support the first pulley on the device main body, a second pulley that applies a rotational force to the first pulley via a belt, a drive unit that drives the second pulley, and a fixing member that fixes the device main body to the frame.The device main body is placed on the frame of the watergate from above so that the nut member of the watergate engages with the engagement hole of the first pulley, and the device main body is fixed to the frame by the fixing member, so that the device main body can be installed on the watergate.

[0008] This allows the device body to be easily installed on an existing gate by placing the device body on the frame of the gate from above so that the nut member of the gate engages with the engagement hole of the first pulley and fixing the device body to the frame with the fixing member, and installing the device body on the gate. In this case, the device body is pre-installed with the first pulley rotatably supported by multiple guide rollers, the second pulley rotated by a drive unit, and the belt wound around the first and second pulleys, so there is no need to install or adjust the pulleys and belts at the installation site. Effect of the Invention

[0009] According to the present invention, since it can be easily installed on an existing floodgate, a manual floodgate can be motorized, eliminating the need for human labor required for opening and closing the floodgate, and, for example, if the floodgate can be opened and closed electrically by remote control during flood damage or emergencies, this is extremely advantageous for disaster prevention and mitigation measures. In this case, since there is no need to install or adjust the pulleys and belts on-site, installation work can be performed extremely easily. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a side view of a water gate opening and closing device according to an embodiment of the present invention; [Diagram 2] Cross-sectional view along line AA [Diagram 3] Plan view of the main part of the water gate opening and closing device [Figure 4] A front view of the first pulley and the guide roller [Diagram 5] An exploded front view of a first pulley and a guide roller [Figure 6] A plan view of the first pulley and the guide roller [Figure 7] Exploded perspective view of the main part of a water gate opening and closing device [Figure 8] Exploded perspective view of the main part of a water gate opening and closing device [Figure 9] Exploded perspective view of the main part of a water gate opening and closing device [Figure 10] Exploded perspective view of the main part of a water gate opening and closing device [Figure 11] Exploded perspective view of the main part of a water gate opening and closing device [Figure 12] Front view of the gate [Figure 13] A front view of a water gate showing the installation process of a water gate opening and closing device [Figure 14] A front view of a water gate showing the installation state of a water gate opening and closing device [Figure 15] Side view of the main part showing the installation process of the water gate opening and closing device [Figure 16] An exploded side view showing the installation process of a water gate opening and closing device. [Figure 17] FIG. 13 is a partial cross-sectional front view showing a modified example of the guide roller; [Figure 18] A plan view of the main part of a water gate opening and closing device showing the arrangement of spherical washers [Figure 19] FIG. 13 is an exploded perspective view of a main part of a water gate opening and closing device showing another modified example of the guide roller. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] 1 to 19 show one embodiment of the present invention, which shows a water gate opening and closing device for opening and closing a small water gate installed in, for example, an irrigation channel.

[0012] The floodgate opening and closing device 1 of this embodiment is installed in an existing manual floodgate 2. As shown in Fig. 12, the floodgate 2 includes a gate body 3 for opening and closing the waterway, a screw shaft 4 attached to the gate body 3, a gate-shaped frame 5 for supporting the screw shaft 4, a nut member 6 screwed onto the screw shaft 4, a base part 7 for supporting the nut member 6, and a handle 8 engaged with the nut member 6. The gate body 3 is raised and lowered by rotating the handle 8.

[0013] The floodgate opening and closing device 1 comprises a device main body 10 attached to the frame 5 of the floodgate 2, a first pulley 20 engageable with a nut member, a plurality of guide rollers 30 supporting the first pulley 20 rotatably on the device main body 10, a second pulley 50 applying a rotational force to the first pulley 20 via a belt 40, a drive unit 60 as a drive section for driving the second pulley 50, a plurality of first and second fixing members 70, 80 for fixing the device main body 10 to the frame 5, a handle mounting member 100 for mounting a manual handle 90, and a cover 110 for covering the device main body 10.

[0014] The device body 10 includes a horizontally long bottom plate 11 extending along the longitudinal direction of the frame 5, and first and second top plates 12, 13 arranged above the bottom plate 11 at intervals from the bottom plate 11, and a plurality of supports 14 for supporting the first top plate 12 and the second top plate 13 are provided at the four corners of the bottom plate 11. The first top plate 12 and the second top plate 13 are arranged at intervals from each other in the longitudinal direction of the bottom plate 11, and have cutouts 12a, 13a formed along the pulleys 20, 50 and the belt 40, respectively. The bottom plate 11 is also provided with a circular hole 11a for inserting the screw shaft 4 and the nut member 6.

[0015] The first pulley 20 is a toothed pulley, and has an engagement portion 21 on its underside with which the guide rollers 30 engage. The engagement portion 21 is formed in a cylindrical shape with an outer diameter smaller than the belt winding portion of the first pulley 20, and has an annular recess 21a extending in the circumferential direction on its outer circumferential surface with which the guide rollers 30 engage. A hexagonal engagement hole 22 that can engage with the nut member 6 and the handle attachment member 100 is provided in the radial center of the first pulley 20, and the engagement hole 22 is formed to penetrate the first pulley 20 in the axial direction.

[0016] The guide rollers 30 are arranged at equal intervals in the circumferential direction of the first pulley 20, and are rotatably attached to the upper end of a cylindrical support shaft 31 via a bearing (not shown). Each guide roller 30 engages with a recess 21a of the first pulley 20 and rotatably supports the first pulley 20 by contacting the first pulley 20 from the radial direction. The support shaft 31 of each guide roller 30 is attached to a rectangular base plate 32 and fixed by a screw 33 inserted through a hole 32a provided in the base plate 32. A plurality of support columns 34 for fixing the base plate 32 to the first top plate 12 and the second top plate 13 are provided on the upper surface side of the base plate 32, and a plurality of support columns 35 for fixing the base plate 32 to the bottom plate 11 are provided on the lower surface side of the base plate 32. In addition, the base plate 32 is provided with a circular hole 32b for inserting the screw shaft 4 and the nut member 6.

[0017] The belt 40 is an endless toothed belt, and is wound around the first pulley 20 and the second pulley 50 so as to mesh with them.

[0018] The second pulley 50 is a toothed pulley having an outer diameter smaller than that of the first pulley 20, and is disposed at a distance from the first pulley 20 in the longitudinal direction of the device body 10.

[0019] The drive unit 60 includes therein a motor and a transmission mechanism (not shown) for driving the second pulley 50, and the second pulley 50 is disposed on the upper surface side thereof.

[0020] The first fixing member 70 consists of a leg 71 arranged below the bottom plate 11, an axis portion 72 extending from the leg 71 to above the bottom plate 11, a support portion 73 supporting the axis portion 72, and a rotating portion 74 provided at the upper end of the axis portion 72 extending above the support portion 73, and the leg 71 moves in the vertical direction relative to the bottom plate 11 by rotating the axis portion 72 using the rotating portion 74.

[0021] The second fixing member 80 is composed of a hook portion 81 disposed below the bottom plate 11, a shaft portion 82 extending from the hook portion 81 to above the bottom plate 11, a support portion 83 supporting the shaft portion 82, and a clamp lever 84 provided at the upper end of the shaft portion 82 extending above the support portion 83, the hook portion 81 being attached to the lower end side of the shaft portion 82 so as to be movable in the vertical direction, and the hook portion 81 can be fixed at any position in the vertical direction by operating the clamp lever 84 in a predetermined direction. The second fixing member 80 is also provided so as to be movable in a direction perpendicular to the longitudinal direction of the device main body 10 (width direction of the frame 5) along a long hole 11b provided in the bottom plate 11.

[0022] The handle 90 comprises an engagement portion 91 engageable with the handle attachment member 100, a circular grip portion 92 that can be held with the fingers, and a number of connecting portions 93 that connect the engagement portion 91 and the grip portion 92, and each connecting portion 93 is provided at equal intervals so as to extend radially from the engagement portion 91 toward the grip portion 92. The engagement portion 91 is provided with a hexagonal engagement hole 91a engageable with the handle attachment member 100, and the engagement hole 91a is formed so as to penetrate the engagement portion 91 in the axial direction.

[0023] The handle attachment member 100 is made of a cylindrical member whose outer circumferential surface has a hexagonal shape similar to that of the nut member 6, and is provided with a flange portion 101 protruding in the radial direction on the outer circumferential surface. The handle attachment member 100 is formed such that an upper portion of the flange portion 101 forms a first engagement portion 102 that engages with the engagement hole 91a of the handle 90, and a lower portion of the flange portion 101 forms a second engagement portion 103 that engages with the engagement hole 22 of the first pulley 20. The handle attachment member 100 is provided with a hole 100a for inserting the screw shaft 4, and the hole 100a is formed so as to penetrate the handle attachment member 100 in the axial direction. The handle attachment member 100 is formed so that the two halves can be separated in the radial direction, and are joined together by fastening the flange portion 101 with a screw 105.

[0024] The cover 110 is made of a box-shaped member with an opening on the bottom side, and is formed with the same width and depth dimensions as the device main body 10. The top surface portion 111 of the cover 110 is formed so that one end side in the width direction is higher than the other parts, and the internal space 112 is designed to accommodate electrical devices such as a battery and a circuit board (not shown). The top surface portion 111 of the cover 110 is also provided with holes 111a through which the screw shaft 4, the handle attachment member 100, and a spacer 120 (described later) are inserted, and the side surface portion 113 of the cover 110 is provided with a notch portion 113a through which the frame 5 is inserted.

[0025] When the watergate opening / closing device 1 configured as above is installed on the watergate 2, the handle 8 is removed from the watergate 2 as shown in Fig. 13, and the watergate opening / closing device 1 is installed on the frame 5 of the watergate 2 as shown in Fig. 14. In this case, as shown in Fig. 15, the device body 10 without the handle 90, the handle mounting member 100, and the cover 110 is placed on the frame 5 of the watergate 2 from above so that the nut member 6 of the watergate 2 engages with the engagement hole 22 of the first pulley 20, and the device body 10 is fixed to the frame 5 by the first and second fixing members 70, 80. At this time, the leg portion 71 of the first fixing member 70 is engaged with the upper surface of the frame 5, and the hook portion 81 of the second fixing member 80 is engaged from below with the lower end of the frame 5 formed in a U-shaped cross section, thereby fixing the device body 10 to the frame 5. In addition, by rotating the rotating portion 74 of the first fixing member 70 and moving the leg portion 71 in the vertical direction, the height position of the device body 10 relative to the frame 5 is adjusted, and by moving the second fixing member 80 in the width direction of the frame 5, the width position of the device body 10 relative to the frame 5 is adjusted.

[0026] Next, the handle attachment member 100 is attached to the first pulley 20. At this time, a retaining member 4a for the nut member 6 is attached to the upper end side of the screw shaft 4 protruding upward from the engagement hole 22 of the first pulley 20, and the hole 104 of the handle attachment member 100 is smaller than the retaining member 4a, so that the screw shaft 4 cannot be inserted into the handle attachment member 100 from the upper end side. Therefore, as shown in Fig. 9, the handle attachment member 100 separated in half in the radial direction is attached to the screw shaft 4 below the retaining member 4a, and the handle attachment member 100 is engaged with the first pulley 20.

[0027] 16, the cover 110 is attached to the device body 10, and the handle 90 is attached to the handle attachment member 100. At this time, a cylindrical spacer 120 is first placed on the outside of the first engagement portion 102 of the handle attachment member 100, and then the handle 90 is engaged with the first engagement portion 102, whereby the spacer 120 positions the handle 90 at a predetermined height.

[0028] Next, when opening or closing the floodgate 2, the drive unit 60 is operated to rotate the second pulley 50, and the rotational force is transmitted to the first pulley 20 via the belt 40, causing the first pulley 20 to rotate. This causes the nut member 6 to rotate together with the first pulley 20, and the screw shaft 4 screwed into the nut member 6 to rise or fall, opening or closing the gate body 3.

[0029] At this time, although not shown, the drive unit 60 can be operated by remote control via wireless communication or the like, or by operating an operating switch connected to the device main body 10.

[0030] In addition, when opening and closing the floodgate 2 manually, the handle 90 is rotated by hand, causing the handle mounting member 100 to rotate together with the handle 90, and the nut member 6 engaged with the handle mounting member 100 to rotate, causing the gate body 3 to rise and fall.

[0031] Thus, according to this embodiment, the device body 10 is placed from above on the frame 5 of the water gate 2 so that the nut member 6 of the water gate 2 engages with the engagement hole 22 of the first pulley 20, and the device body 10 is fixed to the frame 5 by the first and second fixing members 70, 80, so that the device body 10 is installed on the water gate 2. This allows easy installation on an existing water gate 2, and makes it possible to motorize a manually operated water gate 2. This eliminates the need for human labor required to open and close the water gate 2, and is extremely advantageous for disaster prevention and mitigation measures if the water gate 2 is electrically opened and closed by remote control, for example, during floods or emergencies.

[0032] In this case, the first pulley 20 supported for free rotation by a plurality of guide rollers 30, the second pulley 50 provided on the drive unit 60, and the belt 40 wound around the first and second pulleys 20, 50 are pre-attached to the device main body 10, so there is no need to perform installation or adjustment work for each pulley 20, 50 and belt 40 at the installation site, and installation work can be performed extremely easily.

[0033] In addition, since each guide roller 30 is rotatably engaged with an annular recess 21a provided on the outer peripheral surface of the first pulley 20, the vertical movement of the first pulley 20 can be regulated by each guide roller 30, and the first pulley 20 can be reliably supported without any vertical positional deviation.

[0034] Furthermore, the device is provided with a first fixing member 70 that engages with the frame 5 of the floodgate from above, and a second fixing member 80 that engages with the frame 5 from below, and the device main body 10 is fixed to the frame 5 by the first and second fixing members 70, 80. This makes it possible to easily fix the device main body 10 to the frame 5 without performing any additional fixing processing on the frame 5, thereby making it possible to efficiently perform installation work.

[0035] In this case, the first and second fixing members 70, 80 are formed so that their height and width positions relative to the frame 5 can be adjusted, respectively, so that the installation position of the device main body 10 can be adjusted according to the height position of the nut member 6 of the existing floodgate 2 and the width dimension of the frame 5, etc., and even if the dimensions of each existing floodgate differ, the device can be installed in an appropriate position according to the dimensions of the floodgate.

[0036] Furthermore, since a handle mounting member 100 for mounting a manual handle 90 is provided, the water gate 2 can be opened and closed manually using the handle 90 even in cases where the water gate 2 cannot be opened and closed electrically.

[0037] The handle attachment member 100 is formed so as to be engageable with the engagement hole 22 of the first pulley 20 from above the nut member 6, and is also formed so as to allow the screw shaft 4 to be inserted therethrough, and has a first engagement portion 102 on its outer circumferential surface with which the handle 90 can be engaged, so that the handle 90 can be easily attached. In this case, the first engagement portion 102 is formed in the same hexagonal external shape as the nut member 6, so that the handle 8 of an existing floodgate 2 can also be attached thereto.

[0038] Furthermore, since the handle mounting member 100 is formed so that it can be separated in half in the radial direction, even if a locking member 4a for the nut member 6 is attached to the screw shaft 4, the handle mounting member 100 can be separated in the radial direction so as to be attached to the screw shaft 4 while avoiding interference with the locking member 4a, which is extremely advantageous for installation on an existing floodgate 2.

[0039] In the above embodiment, the support shaft 31 of each guide roller 30 is fixed to the base plate 32 by a screw 33. However, as shown in the modified example of FIG. 17, at least one of the guide rollers 30 may be attached to the base plate 32 via a well-known spherical washer 36.

[0040] The spherical washer 36 consists of an annular upper washer member 36a having a convex spherical lower surface and an annular lower washer member 36b having a concave spherical upper surface, and is arranged between the support shaft 31 of the guide roller 30 and the base plate 32 with the spherical surfaces of the washer members 36a, 36b in slidable contact with each other.

[0041] As a result, the spherical surfaces of the washer members 36a, 36b of the spherical washer 36 slide against each other to tilt the support shaft 31, thereby allowing for minute radial displacement of the first pulley 20 and enabling minute position adjustment of the first pulley 20. Furthermore, even if the force applied to the guide roller 30 in a direction perpendicular to the axial direction increases, for example when excessive tension is generated in the belt 40 due to load fluctuations when opening and closing a watergate, the spherical washer 36 allows for minute radial displacement of the first pulley 20, so the first pulley 20 can always rotate stably.

[0042] In this case, assuming that the load on the belt 40 increases during the opening operation when high water pressure is applied to the door body 3, it is effective to provide a spherical washer 36 on the guide roller 30 closest to the second pulley 50, which is located on the side where tension is generated in the belt 40 by the rotation of each pulley 20, 50 (the pulling side), as shown in Figure 18.

[0043] Incidentally, the spherical washers 36 may be provided not only on the guide rollers 30 at the above-mentioned locations, but also on other guide rollers 30.

[0044] 19, the screw 33 for fixing the support shaft 31 to the base plate 32 may be inserted into an elongated hole 32c provided in the base plate 32, and the position of each guide roller 30 relative to the radial direction of the first pulley 20 may be adjusted along the elongated hole 32c. This allows the position of the first pulley 20 to be adjusted so that the tension of the belt 40 is appropriate when the first pulley 20 is attached to the device body 10, and the device body 10 can be installed on the water gate 2 at the site in a state in which the first pulley 20 supported by each guide roller 30 can always rotate stably. The position of the first pulley 20 can also be adjusted after installation.

[0045] The above embodiment is merely an example of the present invention, and the present invention is not limited to the above embodiment. [Explanation of symbols]

[0046] Reference Signs List: 1...water gate opening and closing device, 2...water gate, 3...gate body, 4...screw shaft, 5...frame, 6...nut member, 10...device main body, 20...first pulley, 22...engagement hole, 30...guide roller, 36...spherical washer, 40...belt, 50...second pulley, 60...drive unit, 70...first fixed member, 80...second fixed member, 90...handle, 100...handle mounting member.

Claims

1. A water gate opening and closing device is installed on a water gate having a gate-shaped frame supporting a screw shaft attached to a gate body, and raises and lowers the gate body by rotating a nut member screwed onto the screw shaft. A device main body that is installed on a frame of the water gate; a first pulley having an engagement hole capable of engaging with the nut member and rotatable together with the nut member; a plurality of guide rollers arranged at intervals from each other in a circumferential direction of the first pulley and abutting against an outer peripheral surface side of the first pulley from a radial direction, thereby rotatably supporting the first pulley on the device body; a second pulley that applies a rotational force to the first pulley via a belt; A drive unit that drives the second pulley; a fixing member for fixing the device body to the frame, The device body is placed on the frame of the water gate from above so that the nut member of the water gate engages with the engagement hole of the first pulley, and the device body is fixed to the frame by a fixing member, so that the device body is installed on the water gate. A water gate opening and closing device.

2. Each of the guide rollers is formed to rotatably engage with an annular recess provided on the outer circumferential surface of the first pulley.

2. The water gate opening and closing device according to claim 1.

3. The fixing member includes a first fixing member that is engaged with the frame from above, and a second fixing member that is engaged with the frame from below.

2. The water gate opening and closing device according to claim 1.

4. The first fixing member is formed so that its position in the height direction relative to the frame can be adjusted.

4. The water gate opening and closing device according to claim 3.

5. The second fixing member is formed so that its position in the width direction relative to the frame can be adjusted.

4. The water gate opening and closing device according to claim 3.

6. A handle attachment member is provided for attaching a manual handle, The handle attachment member is formed so as to be engageable with the engagement hole of the first pulley from above the nut member, and is formed so as to allow the screw shaft to be inserted therethrough, and has an engagement portion on its outer circumferential surface with which the manual handle can be engaged.

2. The water gate opening and closing device according to claim 1.

7. The handle attachment member is formed so as to be separable into two halves in the radial direction.

7. The water gate opening and closing device according to claim 6.

8. At least one of the guide rollers is attached to the device body via a spherical washer.

2. The water gate opening and closing device according to claim 1.

9. The guide rollers are provided so that their positions can be adjusted in the radial direction of the first pulley.

2. The water gate opening and closing device according to claim 1.

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