JP3761183B2 - Movable cover for water tank - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a movable cover for a water storage tank that can be opened and closed by moving and moving along the circular rail of the upper section of the water storage tank. The present invention relates to a movable cover for a water storage tank that is configured as a wheel unit that is swingably mounted via a shaft, and that can be driven with a small pressing force at the start of traveling.
[0002]
[Prior art]
In general, a water tank in a water purification plant is provided with a cover that covers the upper side so that dust, rainwater, etc. do not enter, but as a conventional technique, a cover for a water tank that covers a water tank with a plurality of connected cover materials is known. (Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-70927
[Problems to be solved by the invention]
A conventional water tank cover (Patent Document 1) is constructed by connecting a plurality of cover materials at first and second locking ends formed at both ends, and erected in the water tank. In the case of covering, since the cover member is deployed in an inverted state while engaging the mutual first locking end and the second locking end, it takes time to install the cover member in the water storage tank. There is.
[0005]
In addition, when performing water quality inspection and maintenance inspection of the water storage tank, it is necessary for the operator to perform the operation of removing the cover member while sequentially disengaging the cover member from the engagement end. Therefore, there is no problem when the water storage tank is small, but when the water storage tank is large, if it is a large and sturdy cover material, the weight increases, so it is difficult to construct the cover material and to open and close the upper part of the water tank. There is a problem.
[0006]
Therefore, the present invention solves the problems of the prior art as described above, and even if the cover is stopped even if the weight is increased by making it a large and sturdy cover so that it can cope with a large water storage tank. For example, for a water storage tank that can start traveling along a rail with a small pressing force by human power, can be driven with a small pressing force even during traveling, and can prevent the movable cover from being lifted by a strong wind. An object is to provide a movable cover.
[0007]
[Means for Solving the Problems]
According to the present invention, a pulley device including a wheel unit is provided on a cover, and the wheel unit including two wheels that are in contact with a circular rail in cross section is provided on a bracket of the pulley device so as to be swingable via a pivot shaft. The load of the movable cover is distributed and received on each wheel that contacts the circular rail in cross section so that the cover can be driven with a small pressing force at the start of traveling even if the weight of the cover increases. This problem is solved based on the concept of “Yes”.
[0008]
Based on the above concept, the present invention is based on a cross-sectional circular rail in which cover bodies, each having a pulley device with a wheel unit attached to a bracket, provided in the vicinity of four corners, are installed at opposite edges of a water storage tank. In the movable cover for a water storage tank that can be run in a horizontal direction, the bracket includes a horizontal support plate that is attached to the cover body, a pair of vertical substrates that are suspended below the horizontal support plate, and a An inclined substrate extending outwardly from the lower end in a downwardly inclined manner, and the wheel unit has two wheel shafts spaced apart and fixed between a pair of plate-like bodies, and wheels are mounted on the wheel shafts. The two wheels are provided in series between the pair of plate-like bodies, and the pulley device is fixed between the pair of vertical substrates of the bracket. The wheel unit is swung through the pivot shaft. The wheel unit is swingably mounted via a pivot shaft fixed to each inclined substrate of the bracket and the wheels of the wheel unit constituting the pulley device are circular in cross section. This is a movable cover for a water storage tank that holds the rail and contacts the wheel from the three directions of the vertical direction and the lower part on both sides .
[0009]
[Action]
The movable cover for the water storage tank is moved and traveled by an operator pressing one of the corners of the movable cover in the traveling direction. In this case, at the start of traveling and during traveling, two wheels provided in series of wheel units attached to the brackets of the pulley device provided at the four corners are vertically and laterally attached to the circular rail in cross section. Ring from the bottom. At this time, since the wheel unit is swingably attached to the vertical board and the inclined board of the bracket constituting each pulley device via the pivot shaft, each wheel is always in contact with the circular rail in cross section and is movable. Disperse the vertical load and horizontal load of the cover, and receive them uniformly at each wheel. As a result, even if one corner of the movable cover is started at the start of traveling, the movable cover starts to move before in-plane deformation (diamond deformation) of the cover occurs, and the movable cover starts traveling with a small pressing force. Is possible. In addition, since the wheels of the wheel unit constituting the pulley device hold the circular rail in cross section and contact from the three directions of the vertical direction and the lower part on both sides, the movable cover may not be lifted even by strong winds. it can.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an explanatory view showing an installation state of a movable cover for a water storage tank, FIG. 2 is a schematic perspective view schematically showing the installation state of a movable cover for a water storage tank, and FIG. 3 is a perspective view in the vicinity of a pulley device. 4 is a front view of the pulley device, FIG. 5 is a plan view of the pulley device, FIG. 6 is an exploded view of the wheel unit, FIG. 7 is a perspective view of the wheel unit, and FIGS. It is a perspective view of a shaft.
[0011]
The movable cover 1 for a water storage tank is generally composed of a cover main body 2 that covers the upper part of the water storage tank 15 and a pulley device 3 attached to the cover main body 2. As shown in FIG. 1, the movable cover 1 for the water storage tank is provided along the cross-section circular rails 16 and 16 that are continuously installed in the both edges 15 a and 15 a of the water storage tank 15 in the longitudinal direction. The water tank is opened and closed by this travel. The circular rail 16 is attached to and installed on a plurality of support legs 16a fixed to the water tank edge 15a at intervals.
[0012]
The cover body 2 has a gable roof shape (FIG. 1, FIG. 1) in which an aluminum plate is attached to a frame (not shown) in which a metal aggregate 2a (a part of which is shown in FIG. 3) is framed. 2), a dome shape (not shown), or a one-flow shape, and the pulley device 3 is attached to a hanging portion 2b formed at both side ends of the cover body 2. As shown in FIGS. 1 and 2, the pulley device 3 is provided in the vicinity of the four corner portions of the cover body 2, but may be additionally provided in addition to the corner portions as necessary.
[0013]
As will be described below, the pulley device 3 includes a bracket 4 and a wheel unit 8 that is swingably attached to the bracket 4 via pivot shafts 13 and 14.
[0014]
As shown in FIGS. 3 to 5, the bracket 4 includes a horizontal support plate 5 attached to the hanging portion 2 b of the cover main body 2, and a pair of vertical substrates 6 and 6 suspended below the horizontal support plate 5. And an inclined substrate 7 extending outward from the lower end of the vertical substrate 6 in a downwardly inclined manner (see FIG. 4).
[0015]
In this case, the angle θ formed between the inclined substrates 7 and 7 is 110 ° to 170 °, but is preferably around 140 °. 3 to 5, reference numeral 6a denotes a curved portion provided on the vertical substrate 6, 4a denotes a reinforcing rib, and each figure shows the rib 4a formed on one side. However, the ribs 4 a may be formed on both sides of the bracket 4. Further, the inclined substrate 7 may be extended directly outward from the lower end of the vertical substrate 6 without providing the curved portion 6 a on the vertical substrate 6.
[0016]
As shown in FIGS. 6 and 7, the wheel unit 8 has two wheel shafts 10, 10 spaced apart in the longitudinal direction, that is, in the traveling direction of the pulley device, between a pair of rectangular plate-like bodies 9, 9. Is fixed, and the wheels 11 and 12 are rotatably inserted on the wheel shafts 10 and 10 respectively, and two vertically oriented wheels are interposed between a pair of rectangular plates 9 and 9. 11 and 12 are provided side by side in series.
[0017]
FIG. 6 shows an exploded view of the wheel unit 8. When the wheel unit 8 is assembled, the wheel shaft is inserted into the two locking holes 9 a and 9 a drilled in the longitudinal direction of one rectangular plate 9. 10 and 10 are welded or caulked, respectively, and the wheels 11 and 12 are inserted into the wheel shafts 10 and 10, respectively. Then, the locking holes 9a formed in the other plate-like body 9 are provided. The ends of the wheel shafts 10 and 10 are respectively welded or caulked to 9a.
[0018]
The wheel unit 8 formed in this way has a rigid structure that does not rattle, distort, or twist because the pair of plate-like bodies 9, 9 are connected and fixed by the two wheel shafts 10, 10. Become. In order to make the pair of plate-like bodies 9 and 9 of the wheel unit 8 have a rigid structure, the upper part of the pair of plate-like bodies 9 and 9 may be connected by a plate body so as to have an integral U-shape. I do not care. Also in this case, the wheel shafts 10 are fixed between the plate-like bodies 9.
[0019]
As will be described below, the pulley unit 3 is configured such that the wheel unit 8 is swingably attached via a pivot shaft 13 fixed between a pair of vertical substrates 6 and 6 of the bracket 4, and the bracket 4 The wheel unit 8 is swingably attached via a pivot shaft 14 fixed to each inclined substrate 7, 7.
[0020]
That is, the pivot shaft 13 is rotatably fitted in the through-holes 9 b and 9 b formed in the center of the plate-like bodies 9 and 9 constituting the wheel unit 8, and the pivot shaft 13 is the vertical substrate 6 of the bracket 4. , 6 is fastened with a nut 13a and the wheel unit 8 is swingably mounted between the vertical substrates 6 and 6 with the pivot shaft 13 as an axis.
[0021]
Further, a pivot shaft 14 is rotatably fitted in the through holes 9b, 9b formed in the central portion of the plate-like bodies 9, 9 constituting the wheel unit 8, and the pivot shaft 14 is inserted into the inclined substrate 7 with a nut 14a. The wheel unit 8 is swingably attached to the inclined substrate 7 of the bracket 4 by being fastened and fixed in a cantilever manner.
[0022]
In this embodiment, considering that the pivot shaft 14 is cantilevered by the inclined substrate 7, the diameter of the pivot shaft 14 is larger than the diameter of the pivot shaft 13 fixed between the vertical substrates 6 and 6. Although the shaft is slightly larger, the pivot shaft 13 and the pivot shaft 14 may have the same diameter. In this case, the through holes formed in the plate-like body 9 of the wheel unit 8 have the same diameter.
[0023]
As described above, the two wheels 11 and 12 of the wheel unit 8 that are swingably mounted between the vertical substrates 6 and 6 of the bracket 4 constituting the pulley device 3 are arranged on the circular rail 16 in the traveling direction. Line up in series and contact from vertical to vertical. Further, the wheels 11 and 12 of the wheel unit 8 that are swingably attached to the inclined substrates 7 and 7 of the bracket 4 are also in contact with the lower portions on both sides of the circular cross-section rail 16 in series in the running direction.
[0024]
As a result, the wheels 11 and 12 provided in series with the wheel unit 8 of the pulley device 3 are in contact with the circular cross-section rail 16 from the three directions of the vertical direction and the lower part on both sides, and the cross-section circular rail 16 is connected. It becomes a mode to embrace.
[0025]
The structure of the movable cover 1 has been described above. However, when the water storage tank 15 is large and the movable cover 1 for one water storage tank cannot cover the entire water storage tank 15, the hanging portion 2b of the cover main body 2 is used. A plurality of movable cover 1 for water storage tanks having different heights and widths are prepared, and a plurality of circular rails 16 are installed adjacent to the edge of the water storage tank so that the cover body 2 of the movable cover 1 overlaps vertically. So that they can be telescoped into each other.
[0026]
When the telescope type is used in this way, a plurality of movable cover 1 can be provided by extending the cross-section circular rails 16 on both outer sides of the water storage tank 15 by a length corresponding to one of the movable cover 1. It can be stored on both outer sides of the water storage tank 15. In this way, for example, when the upper part is opened at the time of water quality inspection and inspection, the movable cover 1 is moved so as to be overlapped with each other, or a part thereof is opened, or a circular section extending outside the water tank 15. Move and run so as to overlap each other on the rail side, and open the whole. Further, when the upper part of the water storage tank 15 is covered, the movable cover 1 for the water storage tank may be run to cover the entire water storage tank 15.
[0027]
The effect of the movable cover 1 for a water storage tank having the above-described configuration will be described. When the movable cover 1 for the water storage tank is provided on each cross-section circular rail 16 installed at both edges 15 a and 15 a of the water storage tank 15, the pulley device 3 is configured from the ends of the cross-section circular rails 16 and 16. It is inserted and provided so as to be held by the wheels 11 and 12 of the wheel unit 8.
[0028]
The movable cover 1 provided on the circular rail 16 in this way is vertical so that the wheels 11 and 12 arranged in series of the wheel units 8 constituting each pulley apparatus 3 hold the circular rail 16 in cross section. Since the wheel contact is made from the three directions of the direction and the lower part on both sides, the pulley device 3 does not come off from the circular rail 16 in cross section, and the movable cover 1 can be prevented from lifting even against strong winds.
[0029]
Further, since the rail has a circular cross section, the pulley apparatus can be used even if there is a large amount of snow on the movable cover 1 or a solar panel is placed on the movable cover 1 or an operator rides on it to increase its weight and bend. Since the three wheels 11 and 12 can always be in contact with the center of the rail toward the center of the rail, even if the weight increases and bends, it is possible to prevent the traveling of the movable cover 1 from being hindered.
[0030]
As described above, the movable cover 1 provided on the circular cross-section rail installed in the water storage tank is moved and traveled when an operator presses one of the corner portions in the travel direction. In this case, during traveling, the wheels 11 and 12 of the wheel unit 8 attached to the vertical board 6 of the bracket 4 constituting the pulley device 3 provided at the four corners are vertically connected in series with the circular rail 16 in cross section. Ring in line. At this time, since the wheel unit 8 is swingably attached to each pulley device 3, the vertical load (component force) of the movable cover 1 is dispersed to contact the circular rail 16 in cross section. The wheels 11 and 12 can be received evenly at all times.
[0031]
Further, the wheels 11 and 12 arranged in series of the wheel units 8 attached to the inclined substrate 7 of the bracket 4 are in contact with the lower portions on both sides of the circular rail 16 in cross section. At this time, since the central portion of the cover body 2 tends to bend, a horizontal load (component force) acts on the pulley device, but since the wheel unit 8 is swingably attached to the inclined substrate 7, The wheels 11 and 12 that are in contact with the circular rail 16 with a horizontal load dispersed can be received evenly at all times.
[0032]
As a result, the load in the vertical direction and the load in the horizontal direction of the movable cover 1 are always received evenly by the wheels 11 and 12 of each wheel unit 8 constituting the pulley device 3, so that the movable cover 1 that has started to travel once can be removed. During traveling, the vehicle can be moved and moved easily with a small pressing force.
[0033]
In particular, the movable cover 1 for the water storage tank starts to travel with a small pressing force at the start of moving traveling, as will be described in detail below. When the vicinity of any one corner of the movable cover 1 that is stopped is pressed in the direction of the arrow X shown in FIG. 2, for example, the other corner is not pressed, so that the opposite side is left behind. Become. Therefore, the cover main body 2 is in a state of being deformed in-plane, that is, a rhombus (when viewed from above).
[0034]
In this case, when the in-plane deformation state is reached, all the pulley devices are not equally loaded, and for example, the pulley unit is provided in a rigid structure so that the wheel unit is not swingable and does not swing. If one of the two wheels of the wheel unit is loaded, the load is not so much applied to one of the wheels, but the other wheel is overloaded and the resistance increases and the movement becomes poor. The cover cannot be pushed out. In addition, when only one wheel is provided on each substrate of the pulley device instead of the wheel unit, the load is excessively applied to one wheel, so that the resistance is large and the movement is not good. I can't. If the movement becomes worse in this way, the in-plane deformation of the cover main body 2 is further increased by the start of movement, and cannot be pushed out with a small pressing force.
[0035]
However, when the corner of the movable cover 1 that is stopped is pressed in the pushing direction, one wheel 11 of the wheel unit 8 provided on the vertical substrate 6 tends to float, and the other wheel 12 tends to sink. However, since the wheel unit 8 is swingably attached to the vertical board 6 of the bracket 4 constituting the pulley apparatus 3, the two wheels 11 of the wheel unit 8 are swung by the swing of the wheel unit 8. 12 receives the load in the vertical direction equally and contacts the circular rail 16 in cross section.
[0036]
At the same time, when the corner portion is pressed as described above, one wheel 11 of the wheel unit 8 provided on the inclined substrate 7 tends to move away from the circular rail 16 and the other wheel 12 tends to bite. However, since the wheel unit 8 is swingably attached to the inclined substrate 7 of the bracket 4 constituting the pulley device 3, the two wheels 11 of the wheel unit 8 are moved by the swing of the wheel unit 8. 12 receives the load in the horizontal direction uniformly and contacts the circular rail 16 in cross section.
[0037]
As described above, when one corner portion is pressed when the movable cover 1 starts moving, the wheels 11 and 12 of the wheel unit 8 constituting the pulley device 3 provided in the vicinity of each corner portion are even. Therefore, the movable cover 1 can be moved with a small pressing force at the beginning of the moving travel.
[0038]
In this case, in particular, the wheel unit 8 constituting the pulley device 3 is swingably provided, and the wheels 11 and 12 contacting the circular rail 16 in section receive the load evenly. Even if one corner portion is pressed as described above at the beginning of moving travel, since the movable cover 1 starts to move before the in-plane deformation of the cover occurs, the in-plane deformation of the cover is prevented. Thus, the movable cover 1 can be moved with a pressing force smaller than expected.
[0039]
Incidentally, a running test was conducted because it is a question of how much pressure the movable cover for the water storage tank can be moved at the beginning of moving running. A movable cover 1 for a water storage tank is formed by attaching an aluminum plate material to a frame made of aluminum aggregate and forming a cover body 2 with a width of 10,100 mm between circular rails 16 and 16 and a length in a traveling direction. The total weight formed by attaching the pulley apparatus 3 to the four corners is about 1.2 tons, with a height of 2,800 mm, an upper slope of the cover body 2 of 5 °, and an inclination angle of 5 °. In this case, the vertical load applied to one pulley apparatus 3 is approximately 300 kg, and the horizontal load is approximately 300 kg.
[0040]
The pulley device 3 is formed by a wheel unit 8 in which wheel shafts 10 and 10 having MC nylon wheels 11 and 12 having an outer diameter of 60 mm inserted are attached to a stainless steel plate-like body 9 with an inter-axis distance of 80 mm. It is. In this case, the angle θ formed by the inclined substrate 7 of the bracket 4 made of ordinary steel was set to 140 °. The movable cover 1 provided with the pulley device 3 was installed on stainless steel circular cross-section rails 16 and 16 having an outer diameter of 60.5 mm installed horizontally, and a running test was performed.
[0041]
As a result, the movable cover 1 stopped was started to move when a pressing force of about 10 kg was applied to one corner. Thus, the ability to start moving the 1.2-ton movable cover with a pressing force of around 10 kg means that it is possible to start traveling lightly with a small pressing force that would not normally be considered.
[0042]
In the above embodiment, the plate material of the cover main body has been described as being made of aluminum, but other metal plate materials, plastic plate materials such as acrylic and FRP may be used. The material of the cross-section circular rail may be a metal such as aluminum, stainless steel, ordinary steel, or carbon steel, and the material of the wheel may be MC nylon, engineering plastic, metal, or the like. In addition to the pulley device, a motor drive wheel that contacts the circular rail in section may be additionally provided in the movable cover. In this case, the movable cover starts running with a small driving force.
[0043]
【The invention's effect】
The movable cover for the water storage tank of the present invention has a cover body provided with pulleys in the vicinity of the four corners, so that the movable cover is moved along the circular cross-section rails installed at the opposite edges of the water storage tank. It is possible to easily open and close the upper portion of the water tank.
[0044]
A pulley device attached to the cover body is pivotally attached to each inclined board of the bracket while a wheel unit is swingably attached via a pivot shaft fixed between a pair of vertical boards of the bracket. Since the wheel unit is swingably mounted via a shaft, the wheel provided in series with the wheel unit is in contact with the circular rail in the vertical direction and from the three lower sides on both sides. Thus, since the cross-section circular rail is held, it is possible to prevent the movable cover for the water storage tank from being lifted even against a strong wind.
[0045]
The wheel unit has two wheel shafts spaced apart and fixed between a pair of plate-like bodies, and each wheel is rotatably inserted into the wheel shaft one by one, thereby The pulley unit attached to the cover body swings the wheel unit via a pivot shaft fixed between a pair of vertical substrates of the bracket. Since the wheel unit is swingably mounted via a pivot shaft fixed to each inclined substrate of the bracket and is configured to be freely movable, when the movable cover for the water storage tank starts moving, When one corner is pushed, each wheel of the wheel unit provided on the vertical board can receive the load in the vertical direction evenly, and at the same time, each wheel of the wheel unit provided on the inclined board is horizontal. Load in the direction evenly It can be stopped.
[0046]
Further, since the wheel unit constituting the pulley device is provided so as to be swingable, even when one corner portion is pressed at the beginning of the moving traveling of the movable cover, the in-plane deformation of the cover is performed. Is prevented, and the movable cover can be moved with a smaller pressing force than expected.
[0047]
As a result, even if the movable cover for the water storage tank is large and increases in weight, the movable cover that has been stopped can be started to travel with a small pressing force, and is small after the start of traveling. It is possible to run lightly with the pressing force.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an embodiment of the present invention and showing an installation state of a movable cover for a water storage tank.
FIG. 2 is a schematic perspective view schematically showing the installation state of the movable cover.
FIG. 3 is a perspective view of the vicinity of the pulley device.
FIG. 4 is a front view of the pulley device.
FIG. 5 is a plan view of the pulley device.
FIG. 6 is an exploded view of the wheel unit.
FIG. 7 is a perspective view of the wheel unit.
8A and 8B are perspective views of a pivot shaft, respectively.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Movable cover 2 for water tank Cover body 2a Aggregate 2b Hanging part 3 Pulley device 4 Bracket 4a Rib 5 Horizontal support plate 6 Vertical substrate 6a Curved part 7 Inclined substrate 8 Wheel unit 9 Plate-like body 9a Locking hole 9b Through Hole 10 Wheel shaft 11, 12 Wheel 13 Pivot shaft 13a Nut 14 Pivot shaft 14a Nut 15 Water tank 15a Water tank edge 16 Cross-section circular rail 16a Support leg θ Angle formed between the inclined substrates 7, 7

Claims (1)

Movable type for a water storage tank whose cover body, which has a pulley unit with a wheel unit attached to a bracket in the vicinity of the four corners, can travel along circular rails installed at opposite edges of the water storage tank. In the cover,
The bracket is extended outward in a downwardly inclined manner from a horizontal support plate attached to the cover main body, a pair of vertical substrates suspended below the horizontal support plate, and a lower end of the vertical substrate. An inclined substrate,
The wheel unit has two wheel shafts spaced apart and fixed between a pair of plate-like bodies, and a pair of plate-like bodies are rotatably mounted on the wheel shafts one by one. Two wheels are arranged in series between them,
In the pulley apparatus, the wheel unit is swingably attached via a pivot shaft fixed between a pair of vertical substrates of the bracket, and via a pivot shaft fixed to each inclined substrate of the bracket. The wheel unit is configured to be swingably mounted,
A movable cover for a water storage tank, wherein a wheel of a wheel unit constituting the pulley device holds the circular rail in cross section and contacts a wheel from three directions of a vertical direction and lower portions on both sides .

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