JP2012127092A - Lifting gate and manufacturing method of bag body of lifting gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lifting gate and a manufacturing method of a bag body of the lifting gate to be advantageous in terms of costs as well by achieving merits of multiple bags by a single bag.SOLUTION: The lifting gate includes a door body 5 supported at a bottom part 2a of a water channel 2 and turnable between an erected position U on the upstream side and a brought-down position D on the downstream side, and a bag body 12 installed on the downstream side of the door body 5. By the expansion of the bag body 12 by the supply of fluid, the door body 5 is turned to the erected position U. For the bag body 12, a recessed part 12b recessed inwards is formed over the width direction at an outer end face part at a position for roughly equally dividing the inside in the vertical direction, an air permeable ventilation sheet 26 whose one end 26a is fixed to the bottom part of the recessed part 12b and other end 26b is held between the distal ends 12c of the bag body 12 is provided inside the bag body 12, and thus multiple bags 12 (A, B) whose inside is divided into multiple pieces in the vertical direction are attained.

Description

  The present invention relates to a relief gate and a method of manufacturing a relief gate bag.

  Conventionally, as shown in FIG. 10, a door body 31 supported at the bottom of the water channel 30 and rotatable between an upstream standing position U and a downstream lying position D, and downstream of the door body 31. A plurality of bag bodies 32 (32a, 32b, 32c, 32d) installed on the side are provided, and the door body 31 is rotated to the standing position U by the expansion of the bag bodies 32a to 32d by the supply of fluid. At the same time, there is a undulation gate in which the door body 31 is rotated to the fall position by contraction of the bag bodies 32a to 32d due to fluid discharge (see Patent Document 1).

  In this undulation gate, fluid is simultaneously supplied to and discharged from all the bag bodies 32a to 32d from the injection / discharge pipe 33 through the supply / discharge ports 32e of the bag bodies 32a to 32d.

  On the other hand, there is a raising / lowering gate in which the door body is rotated to the upright position by one bag body 35 and the door body is rotated to the lying position by contraction of the bag body due to the discharge of fluid.

  FIG. 11 shows a comparison between the case of using a plurality of bags 32 [multiple bags ... FIG. 11 (a)] and the case of using only one bag 35 [single bags ... FIG. 11 (b)]. FIG.

  The contact length of the single bag 35 is L1, the contact length of the multiple bag 32 is L2 (L2> L1), and the multiple bag has a contact length that is about 50% longer than that of the single bag. Therefore, since a contact area expands, since the intensity | strength of the door body 31 can be reduced, the door body 31 can be reduced in weight to that extent.

  Moreover, in the multiple bag 32, since a contact area expands, the support load by each bag body becomes about 30% low. Therefore, since the thickness of the rubberized cloth of each bag can be reduced, the weight of each bag can be reduced and the cost can be reduced accordingly.

  Further, in the single bag 35, the position of the support load Fb1 by the bag body and the water pressure P is shifted, so that a rotational moment acts on the rotation center of the door body 31. On the other hand, in the multiple bag 32, the position of the support load Fb2 by the bag body and the position of the water pressure P hardly deviate from each other, so that the rotational moment hardly acts on the rotation center of the door body 31. Therefore, the door body 31 at the standing position U is stabilized.

  From these facts, the internal pressure of the single bag 35 and the multiple bag 32 can be reduced to about ½ in the multiple bag 32 when the single bag 35 is set to 1.

  For this reason, when the undulation gate having the same size and other conditions is used and the single bag 35 requires an internal pressure of about 0.3 MPa, the multiple bag 32 may have about half that of 0.15 MPa. If the internal pressure is 0.2 MPa or more, it is handled as a second type pressure vessel by law, and inspection by an inspection engine is required, whereas if the internal pressure is about 0.15 MPa, the second type pressure vessel is Since it is not handled, there is also an advantage that an inspection by an inspection organization becomes unnecessary.

  Thus, since the multiple bag 32 has many advantages compared with the single bag 35, it can be estimated that demand increases.

JP 59-65114 A

  However, the multiple bag 32 basically has a plurality of single bags 35 which are stacked one above the other in the vertical direction, so that the expensive material cost of the bag body is several compared to the single bag 35. There is a problem in that it is disadvantageous in terms of cost because it is necessary to process and reinforce the supply and discharge ports for supplying and discharging fluid to and from each bag.

  The present invention has been made to solve the above-described problems, and provides a relief gate and a method of manufacturing a relief gate bag body that are advantageous in terms of cost by realizing the advantages of multiple bags in a single bag. It is intended to do.

  In order to solve the above-mentioned problems, the undulation gate of the present invention is supported at the bottom of the water channel, and is capable of rotating between an upstream standing position and a downstream lying position, The bag body is provided on the downstream side, and the door body is rotated to the upright position by the expansion of the bag body by the supply of fluid, and the door body is rotated to the lying down position by the contraction of the bag body by the discharge of fluid. In the undulation gate that has been moved, the bag body is formed with a recessed portion recessed inward over the width direction on the outer end surface portion at a position that divides the interior substantially evenly in the vertical direction, Inside the bag body, there is provided a ventilation member having one end fixed to the bottom of the recess and the other end sandwiched between the front end portions of the bag body, so that a plurality of insides are provided in the vertical direction. The top end of the bag body is overlapped up and down across the other end of the ventilation member. And it is characterized in that it is detachably fixed to the water channel bottom portion in the vicinity of the pivot point of the door body.

  The upper and lower surfaces of each bag body may be configured not to be fixed to the rear surface of the door body and the upper surface of the water channel bottom.

  A bottom metal fitting having a concave portion or a convex portion in the width direction is fixed to the bottom of the water channel, and an upper metal fitting having a convex portion or a concave portion in the width direction facing the lower metal fitting is provided, and the bag is overlapped in the vertical direction. The distal end of the body and the other end of the ventilation member are clamped between the concavo-convex portions by bolting the upper bracket to the lower bracket from above, and are detachably fixed to the bottom of the water channel It can be configured.

  The method of manufacturing a bag body for a relief gate according to the present invention includes a door body supported at the bottom of a water channel and rotatable between an upstream standing position and a downstream lying position, and a downstream side of the door body. The bag body is rotated to the upright position by the expansion of each bag body due to the supply of fluid, and the door body is rotated to the lying down position by the contraction of each bag body due to the discharge of the fluid. A method of manufacturing a bag body for an undulating gate that is moved, the step of fixing one end of a breathable ventilation member across the width direction of a rectangular bag sheet, and the ventilation member And folding the bag sheet in two layers so as to sandwich the bag member, and pulling the other end of the ventilation member toward the inner end of the bag sheet to form a bag body. A hollow part that is recessed inward in the width direction is formed on the outer end surface portion at a position that is divided approximately equally in the direction. A step of, is characterized in that it comprises the step of hermetically sealing the both end portions of the bag body sheet was folded in two superposed.

  According to the undulation gate of the present invention, the bag body is formed of a breathable ventilation member, the outer end surface portion is formed with a hollow portion recessed inward across the width direction, and a plurality of internal portions are formed in the vertical direction. Therefore, the structure is a multiple bag, although it is a single bag.

  Therefore, it is possible to enjoy the advantages of the multiple bag, such as weight reduction and stabilization of the door body, weight reduction of the bag body by reducing the thickness of the rubberized cloth, cost reduction, reduction of internal pressure, and the like.

  In addition, unlike a conventional multiple bag, a plurality of single bags are not stacked and stacked in the vertical direction, but only a recess is formed by a ventilation member. The expensive material cost of the bag is about half. In addition, since the ventilation member is air permeable, it is not necessary to process a supply / exhaust port for supplying / discharging fluid to / from each bag body, which is advantageous in terms of cost.

  According to the method for manufacturing a bag body for an undulating gate of the present invention, one end of a breathable ventilation member is fixed to a rectangular bag sheet, the bag sheet is folded in two layers, By pulling the end in the direction of the inner end of the bag sheet to form a bag body, it is only necessary to form a hollow part that divides the interior approximately evenly in the vertical direction. It becomes possible to manufacture cheaply.

  On the other hand, if the bag body is not fixed to the back surface of the door body and the upper surface of the bottom of the water channel, when replacing the bag body, the door body can be vertically fixed to temporarily stop running water. In this state, it is only necessary to remove the tip of the bag body from the bottom of the water channel, so that the replacement work can be easily performed in a short time.

  The top end portion of the bag body and the other end of the ventilation member are configured to be bent and sandwiched between the concavo-convex portions by bolting the upper metal fitting to the lower metal fitting from above, and detachably fixed to the bottom of the water channel. If it does so, the front-end | tip part of a bag body and the other end of a ventilation member will be firmly fixed to a water channel bottom part. Further, at the time of replacement work, the bag body can be easily and quickly removed from the bottom of the water channel by tilting the door body upstream and then removing the bolt to remove the upper metal fitting.

It is a perspective view of the standing position of the undulation gate according to the embodiment of the present invention. It is a side view of the standing position of the undulating gate of FIG. It is a undulation gate, (a) is a side view of a lying position, (b) is an enlarged view of a circled portion in FIG. 2, (c) is a side view of a method for fixing a ventilation sheet. It is the perspective view which installed several undulation gates side by side in waterways, such as a dam lake. (A) is a disassembled perspective view of an upper metal fitting and a lower metal fitting, and (b) is a perspective view of the front-end | tip part of a protection sheet. (A)-(d) is a manufacturing-process figure of a bag. It is a perspective view of the standing position of the raising / lowering gate provided with the modification of the fixing structure of the ventilation sheet. FIG. 8 is a side view of the undulating gate of FIG. 7. 7 is a undulation gate in FIG. 7, (a) is a side view of a lying position, and (b) is an enlarged view of a portion ◯ in FIG. 8. It is the relief gate of patent document 1, (a) is a rear view, (b) is a side view, (c) is sectional drawing of a bag. (A) is a schematic side view of a multiple bag type bag, and (b) is a schematic side view of a single bag type bag.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. 1 is a perspective view of an upright position U of the undulating gate 3, FIG. 2 is a side view of the upright position U of the undulating gate 3, FIG. 3 is a undulating gate, (a) is a side view of the lying down position D, and (b). 2 is an enlarged view of a circled portion in FIG. 2, and FIG. 3C is a side view of a method for fixing the ventilation sheet 26. FIG. 4 is a perspective view in which a plurality of (four in this example) undulating gates 3 are installed side by side in the waterway 2 of the dam lake 1 or the like.

  In the undulating gate 3, a pit (depression) 2b is formed in the bottom 2a of the water channel 2, and a metal rectangular door 5 is disposed at an upper position in the pit 2b.

  A hinged sheet 7 made of rubberized cloth that also serves as a water stop is routed across the lower part of the door body 5 and the upper metal fitting 6a in the pit 2b, and is fixed to the lower part of the door body 5 with a bolt via a pressing plate 8a. At the same time, it is fixed to the upper metal fitting 6a in the pit 2b with a bolt via a pressing plate 8b.

  Thereby, the door body 5 comes to be supported at the bottom 2a of the water channel 2 so as to be rotatable between the upstream standing position U and the downstream lying position D. In the lying position D, FIG. As shown in (a), it is substantially flush with the bottom 2a of the water channel 2. In addition, although not specifically illustrated, the sealing material at the left and right end portions of the door body 5 comes into contact with the door stoppers 2d on both side portions of the water channel 2 so that the water is stopped between them.

  A retaining band 22 that restricts the maximum standing position U of the door body 5 is attached to the back surface of the door body 5 and the bottom of the pit 2b. In addition, shock absorbing rubbers 23a and 23b are attached to the back surface of the door body 5 and the bottom of the pit 2b to serve as a buffer when the door body 5 falls down.

  A roller 10a is supported by a bracket 10b on the lower inner surface on the downstream side of the door body 5, and the roller 10a abuts against the middle metal fitting 6b in the pit 2b, so that the lower end portion of the door body 5 is formed by the middle metal fitting 6b. Become supported.

  On the downstream side of the door body 5, a bag body 12 that is a multiple bag (upper and lower double in this example) is installed. For example, as shown in FIG. 6A, the bag body 12 is a rectangular rubberized cloth having a width W slightly shorter than the lateral width of the door body 5 and cut to a predetermined length L. It is produced using the sheet 25 for use.

  First, one end 26 a of a breathable breathing sheet (breathing member) 26 is fixed across the width direction of the bag sheet 25. The ventilation sheet 26 is formed by forming a large number of small holes 26c in a flexible synthetic resin sheet having a thickness of several millimeters, and is made of a material having high tensile strength. Note that the sheet does not necessarily have a small hole, and for example, a flexible belt having a thickness of several millimeters may be arranged side by side at an appropriate interval.

  Next, as shown in FIG. 6B, the bag sheet 25 is folded in two so as to sandwich the ventilation sheet 26.

  After that, as shown in FIG. 6C, when the other end 26b of the ventilation sheet 26 is pulled in the direction of both inner end portions 25a of the bag body sheet 25 to become the bag body 12, the interior is vertically moved. A recessed portion 12b that is recessed inward in the width direction is formed in the outer end surface portion 12a at a position that is divided substantially equally.

  Further, after the step of FIG. 6B or the step of FIG. 6C, as shown in FIG. 6D, the both end portions 25b of the bag sheet 25 folded in two layers are hermetically sealed.

  By these manufacturing processes, the bag body 12 is formed with a hollow portion 12b that is recessed inward in the width direction on the outer end surface portion 12a by the breathable air-permeable sheet 26, so that the inside is in the vertical direction. Therefore, the multi-bag 12 (A, B) is formed in a substantially flat hollow pillow shape while being a single bag.

  As shown in FIG. 5 (b), the front end portion 12 c of the bag body 12 is overlapped vertically with the other end 26 b of the ventilation sheet 26 interposed therebetween (three sheets are stacked), and the door body 5. Is fixed to the bottom 2a of the water channel 2 in the vicinity of the rotation fulcrum O.

  Specifically, as shown in FIG. 1 and FIG. 5 (a), a lower metal fitting 14A having a recess 14a in the width direction (or a convex part) 14a is fixed to the lower metal fitting 6c in the pit 2b of the water channel 2. Yes. In the present embodiment, the lower metal fitting 14A is integrally formed with the lower metal fitting 6c. Further, an upper metal fitting 14B having an arcuate convex part (or a concave part) 14b in the width direction facing the lower metal fitting 14A is provided.

  And each front-end | tip part 12c of the bag body 12 piled up and down and the other end 26b of the ventilation sheet 26 bolt the upper metal fitting 14B to the lower metal fitting 14A with the volt | bolt 15 from upper direction, FIG. ) Between the concavo-convex portions 14a and 14b, and is sandwiched by being corrugated. Thereby, the bag body 12 and the ventilation sheet 26 are detachably fixed to the bottom 2 a of the water channel 2.

  Here, the structure which fixes the one end 26a of the ventilation sheet 26 to the sheet | seat 25 for bag bodies is demonstrated. As shown in FIG. 3C, the auxiliary sheet 27 is fixed to one end 26a of the ventilation sheet 26 by bonding or the like so as to be bifurcated. Then, the one end 26a of the ventilation sheet 26 and the auxiliary sheet 27 are fixed to the bag sheet 25 by bonding or the like.

  Thereafter, as shown in FIG. 6C, when the other end 26b of the ventilation sheet 26 and the auxiliary sheet 27 are pulled in the direction of both inner end portions 25a of the bag body sheet 25, as shown in FIG. The outer end surface portion 12a of the body 12 is formed with a recessed portion 12b recessed inward over the width direction.

  The bag body 12 is not fixed to the back surface of the door body 5 and the upper surface of the bottom portion 2a of the water channel 2, that is, is in a free state.

  A supply / exhaust port 16 as shown in FIGS. 1 and 3A is formed at a lower position of the bag body 12, and a ring-shaped reinforcing member 18 that reinforces the periphery of the supply / exhaust port 16 is provided inside the bag body 12. Each is bonded to the outer surface.

  In the hollow box 6d in the pit 2b of the water channel 2, a flexible pipe 20 connected to a terrestrial fluid (for example, air) supply source is disposed. This flexible pipe 20 is connected to the supply / discharge port 16 of the bag body 12. ing.

  Therefore, as shown in FIG. 1, the supply of air from the flexible tube 20 causes the door body 5 to rotate to the standing position U due to the expansion of the bag body 12 through the supply / discharge port 16. Further, as shown in FIG. 3A, the door body 5 is rotated to the lying position D by the contraction of the bag body 12 through the supply / exhaust port 16 by the discharge of air from the flexible tube 20.

  The bag body 12 has the structure of the upper and lower multiple bags 12 (A, B). However, since the ventilation sheet 26 is air permeable, air can flow smoothly without forming a supply / exhaust port. To do.

  In the case of the undulation gate 3 as described above, the bag body 12 is formed with a breathable sheet 26 having a breathability so that the outer end surface portion is formed with a depressed portion 12b that is depressed inward in the width direction, and the inside is formed. Since it is divided into a plurality of pieces in the vertical direction, it has a structure of multiple bags 12 (A, B) substantially while it is a single bag.

  Therefore, the advantages of the multiple bag 12 (A, B) are that the door body 5 is lighter and more stable, the weight of the bag body 12 is reduced by reducing the thickness of the rubberized cloth, the cost is reduced, and the internal pressure is reduced. be able to.

  In addition, unlike the conventional multiple bag, a plurality of single bags are not stacked one above the other in the vertical direction, but only the recess 12b is formed by the ventilation sheet 26. Thus, the expensive material cost of the bag 12 is reduced to about half. In addition, since the ventilation sheet 26 is air permeable, it is not necessary to process a supply / exhaust port for supplying / extracting fluid to / from each bag, which is advantageous in terms of cost.

  Furthermore, since the bag body 12 does not need to be fixed to the back surface of the door body 5 and the upper surface of the bottom portion 2a of the water channel 2, when replacing the bag body 12, the door body 5 is vertically fixed and temporarily fixed. In this state, it is only necessary to remove the distal end portion 12c of the bag body 12 from the bottom portion 2a of the water channel 2, so that the replacement work can be easily performed in a short time.

  Moreover, the front-end | tip part 12c of the bag body 12 and the other end 26b of the ventilation sheet 26 are clamped between the uneven | corrugated | grooved parts 14a and 14b by bolting the upper metal fitting 14B to the lower metal fitting 14A from the upper direction, Since it is detachably fixed to the bottom 2 a of the water channel 2, the leading end 12 c of the bag body 12 and the other end 26 b of the ventilation sheet 26 are firmly fixed to the bottom 2 a of the water channel 2. Further, at the time of replacement work, the bag body 12 can be easily and quickly removed from the bottom 2a of the water channel 2 by removing the bolt 15 and removing the upper metal fitting 14A after the door body 5 is tilted upstream.

  Furthermore, the bag body 12 fixes one end 26a of the air permeable sheet 26 having air permeability to the rectangular bag body sheet 25, and the bag body sheet 25 is folded in two, and the other end 26b of the air permeable sheet 26 is folded. When the bag body 12 is pulled by pulling in the direction of the inner end portion 25a of the bag sheet 25, it is only necessary to form the recess 12b that divides the inside in the vertical direction substantially evenly. Can be manufactured at low cost.

  In the above embodiment, the one end 26a of the ventilation sheet 26 is fixed to the bag body sheet 25, and the one end 26a of the ventilation sheet 26 and the auxiliary sheet 27 so as to be bifurcated are provided on the bag body sheet 25, respectively. It is fixed by bonding or the like.

  On the other hand, as shown in FIGS. 7-9, the hollow part 12b hollowed inward over the width direction of the sheet | seat 25 for bag bodies is formed previously, and the single side | surface by the side of the inner surface of the hollow part 12b is formed. The one end 26a of the ventilation sheet 26 is addressed to the front. The pair of pressing plates 28 a and 28 b extending in the width direction can be fastened and fixed with bolts and nuts 29 to the other surface on the inner surface side of the recessed portion 12 b and one end 26 a of the ventilation sheet 26.

  In the above embodiment, when the bag 12 is manufactured, one bag sheet 25 is folded in two, but the cut ends of the two bag sheets 25 having the length L cut to ½. The parts 26a are abutted with each other, and the one end 26a of the ventilation sheet 26 and the auxiliary sheet 27 can be fixed to each other by bonding or the like across the cut ends of the two bag sheets 25.

  Although the above embodiment has the structure of the upper and lower two-stage multiple bags 12 (A, B), the upper and lower three-stage multiple bags 12 may be configured.

DESCRIPTION OF SYMBOLS 1 Dam lake etc. 2 Waterway 2a Bottom part 3 Undulating gate 5 Door body 12 Bag body 12b Depression part 12c Tip part 14A Upper metal fitting 14B Lower metal fitting 14a Recessed part 14b Convex part 15 Bolt 26 Ventilation sheet (ventilating member)
26a One end 26b The other end 26c Small hole U Standing position D Falling position O Rotation fulcrum

Claims (4)

A door body supported at the bottom of the water channel and rotatable between an upstream standing position and a downstream lying position and a bag body installed downstream of the door body are provided, In the hoisting gate in which the door body is rotated to the standing position by the expansion of the bag body due to the supply, and the door body is rotated to the lying position by the contraction of the bag body due to the discharge of fluid,
The bag body is formed with a hollow portion recessed inward in the width direction at an outer end surface portion at a position where the interior is divided substantially equally in the vertical direction, and the bottom of the hollow portion is formed inside the bag body. One end is fixed to the other end, and the other end is provided between the front end portion of the bag body to provide a breathable ventilation member, so that the interior is divided into a plurality in the vertical direction,
The hoisting gate is characterized in that the front end portion of the bag body is vertically overlapped with the other end of the ventilation member interposed therebetween, and is detachably fixed to the bottom of the water channel near the pivot point of the door body.   The undulating gate according to claim 1, wherein the upper and lower surfaces of each bag body are not fixed to the back surface of the door body and the upper surface of the bottom of the water channel.   A bottom metal fitting having a concave portion or a convex portion in the width direction is fixed to the bottom of the water channel, and an upper metal fitting having a convex portion or a concave portion in the width direction facing the lower metal fitting is provided, and the bag is overlapped in the vertical direction. The distal end of the body and the other end of the ventilation member are clamped between the concavo-convex portions by bolting the upper bracket to the lower bracket from above, and are detachably fixed to the bottom of the water channel The undulating gate according to claim 1, wherein the undulating gate is provided. A door body supported at the bottom of the water channel and rotatable between an upstream standing position and a downstream lying position and a bag body installed downstream of the door body are provided, The door body is rotated to the upright position by the expansion of each bag body due to the supply, and the bag body of the hoisting gate is configured such that the door body is rotated to the lying down position by contraction of each bag body due to the discharge of fluid. A manufacturing method comprising:
Fixing one end of a breathable member having air permeability over the width direction of the rectangular bag sheet;
A step of folding the bag sheet in two layers so as to sandwich the ventilation member;
When the other end of the ventilation member is pulled in the direction of the inner end of the bag body sheet to form a bag body, the outer end surface portion at a position that divides the interior substantially vertically in the width direction extends across the width direction. Forming a hollow portion recessed inward,
The manufacturing method of the bag body of the raising / lowering gate characterized by including the process of airtightly sealing the both ends of the sheet | seat for bag bodies folded by the said 2 piles.

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