JP7065470B2 - Sluice gate opening and closing device - Google Patents

Description

The present invention relates to a water gate opening / closing device that opens / closes a water gate by moving the door body up / down.

For example, Patent Document 1 is known as a conventional technique for a floodgate opening / closing device. Patent Document 1 describes a chain having one end connected to a door body, a drive sprocket around which an intermediate portion of the chain is wound, and the chain is sent to move the door body up and down, and the other end side of the chain. Disclosed is a sluice gate opening / closing device provided with a chain storage body (hereinafter referred to as a chain storage unit) for storing, and further, the position of the chain receiving portion of the chain storage unit is arranged higher than the position of the drive sprocket. There is. Then, in Patent Document 1, the other end side of the chain is wound to guide the other end side of the chain to hang down, and the guide sprocket is rotated to rotate the other end side of the chain. The urging means for urging the sprocket to be sent toward the storage unit is described. As the urging means, a rotation transmission means for transmitting the rotational drive from the drive sprocket to the guide sprocket and a guide sprocket drive device for rotationally driving the guide sprocket are disclosed.

Japanese Unexamined Patent Publication No. 2017-61852

As disclosed in US Pat. In the switchgear, as the urging means, both the rotation transmission means and the guide sprocket drive device have a complicated configuration, so that a large installation space is required as the number of parts increases. At the same time, it was difficult to reduce the assembly man-hours, and it was difficult to simplify the maintenance, so there was room for improvement.

The present invention has been made in view of this point, and with a simple configuration, a chain having one end connected to a door body can be reliably sent to a chain receiving portion of a chain storage portion by rotation of a drive sprocket. The purpose is to provide a sluice gate opening / closing device that can be used.

In order to solve the above problems, the invention according to claim 1 comprises a chain having one end connected to a door body, a drive sprocket on which the chain is wound and the chain is sent to move the door body up and down. A water gate opening / closing device including a chain storage portion for storing the other end side of the chain, which bends the chain over the entire range of the chain extending between the drive sprocket and the chain storage portion. A chain guide to be regulated is arranged , and the chain guide is characterized by being composed of a guide rail that is slidably held so as to sandwich both end faces in the thickness direction of the chain .
In the invention of claim 1, the end of the chain guide on the chain storage portion side is arranged above the chain storage portion. When raising the door body, the drive sprocket is rotationally driven in the opening direction. Since the middle portion of the chain is wound around the drive sprocket, the chain is fed to the other end side. At this time, since the bending of the chain is regulated by the chain guide arranged between the drive sprocket and the chain storage portion, the positional relationship between the drive sprocket and the receiving portion of the chain storage portion in the height direction is substantially the same. In this case, or even when one of them is high, the chain can be reliably pushed out and reliably sent from the drive sprocket to the chain receiving portion of the chain storage portion only by the rotation of the drive sprocket. Then, especially when the position of the chain receiving portion of the chain storage portion is higher than the position of the drive sprocket, the weight of the chain sent in the chain guide is sent from the chain guide to the chain receiving portion of the chain storage portion. It is reduced by the weight of the chain. Therefore, a large load is not applied to the rotational driving force of the driving sprocket. When lowering the door body, either allow the drive sprocket to rotate so that the chain is sent to one end side by the weight of the door body (passive rotation), or close the drive sprocket if necessary. Rotationally driven (active rotation). Since the middle part of the chain is wound around the drive sprocket, the chain is sent to one end side. At this time, the chain stored in the chain storage unit is pulled out from the chain receiving portion of the chain storage unit to the chain guide. Then, the chain is stably and surely fed toward the drive sprocket by the chain guide, and is pulled out to one end side.

The invention according to claim 2 is the invention according to claim 1, wherein the chain has hooking portions protruding from both sides of the chain at predetermined intervals in the longitudinal direction thereof. The chain accommodating portion has a pair of hooking rails for hooking the hooking portions on both side portions of the chain, and the guide rails hold both side portions of the chain slidably. It is characterized in that it is provided in pairs .
In the invention of claim 2, the hooking portions provided at predetermined intervals in the longitudinal direction of the chain project to both side portions of the chain. The end of the hook rail on the drive sprocket side constitutes the receiving part of the chain storage part. The pair of guide rails are configured to be slidably held on both sides without interfering with the hooking portion of the chain. When the chain is fed between the drive sprocket and the chain receiving portion of the chain compartment, both sides of the chain itself are slidably held by a pair of guide rails to regulate the bending of the chain. Sending in a state is embodied. Since a plurality of hooking portions are provided at predetermined intervals in the longitudinal direction of the chain, the hooking portions of the chain sent out to the chain storage portion are hooked on the hooking rails of the chain storage portion. As a result, the chain is stored in a U-shaped suspension between the hooks adjacent to each other in the longitudinal direction. Therefore, the chain can be stored at a height that is approximately half the length between the hooks. In addition, the hook that is finally hooked on the hook rail of the chain storage portion is sent out from the guide rail of the chain guide and then hooked on the hook rail of the chain storage portion. Due to the weight of the chain up to the stop, the weight of the chain sent in the guide rail can be reduced. On the other hand, when the chain stored in the chain storage portion is sent out from the drive sprocket via the guide rail, the hooking portion on the hook rail rises away from the hook rail and is hooked on the guide rail. , The chain is sent out from the wound drive sprocket in the direction of lowering the door body.

The invention according to claim 3 is the invention according to any one of claims 1 or 2, wherein the chain guide is a lower guide portion that guides the chain to be delivered to and from the drive sprocket below the drive sprocket. An upper guide portion that guides the chain to be delivered to and from the chain storage portion above the chain storage portion, and an intermediate portion that guides the chain between the lower guide portion and the upper guide portion. It is characterized by having.
In the invention of claim 3, when the door body is raised, the lower guide portion guides the chain received from the drive sprocket to the lower part of the drive sprocket. After that, it is sent from the lower side to the upper side by the intermediate part, and the sent chain is sent out from the upper part of the chain storage part by the upper guide part and delivered to the chain storage part. The middle portion of the chain guide ensures that the chain can be reliably fed from the lower guide portion to the upper guide portion. Therefore, the chain can be reliably and reliably sent from the drive sprocket to the chain storage portion. On the other hand, when the door body is lowered, the chain stored in the chain storage portion is received by the chain guide from the upper guide portion, passes through the lower guide portion via the intermediate portion, and is actively wound around the drive sprocket. Alternatively, it is sent to one end by passive rotation.

The invention according to claim 4 is characterized in that, in the invention according to claim 3, the upper guide portion includes an idle sprocket in which the chain is wound and driven by the chain being fed. ..
In the invention of claim 4, the idle sprocket is driven to rotate as the wound chain is fed. Therefore, the chain can be stably and reliably sent out and stored on the chain receiving portion of the chain storage portion without colliding with the upper guide portion.

The invention according to claim 5 is characterized in that, in the invention according to any one of claims 3 or 4, a chain support roller is provided outside the bent portion of the lower guide portion.
In the invention of claim 5, since the chain support roller is provided on the outside of the bent portion of the lower guide portion, when the drive sprocket is rotated in the opening direction and the chain is fed toward the chain storage portion, The chain support roller receives the chain pressing outward on the bent portion of the lower guide. Therefore, the frictional resistance of the chain with respect to the guide rail is reduced.

According to the present invention, a chain guide that regulates bending of the chain is arranged between the drive sprocket and the chain storage portion, and a chain having one end connected to the door body is provided by rotation of the drive sprocket. , A sluice gate opening / closing device capable of reliably feeding to a chain receiving portion of a chain storage portion can be provided.

It is a front view which shows the 1st Embodiment of a floodgate and a floodgate opening / closing device of this invention. It is an enlarged view of the main part of the water gate opening / closing device of FIG. It is a schematic diagram which shows the modification of the water gate opening / closing device shown in FIG. It is sectional drawing which was shown for demonstrating an example (A) of the shape of a chain and a chain guide which holds this chain, and another example (B). It is an enlarged view of the main part which shows the 2nd Embodiment of the floodgate opening and closing device of this invention. It is a schematic diagram which shows the modification of the water gate opening / closing device shown in FIG. It is an enlarged view of the main part which shows the 3rd Embodiment of the floodgate opening and closing device of this invention.

First, an embodiment of the floodgate G to which the present invention is applied will be described with reference to FIG.

In the floodgate G, a pair of gate pillars 10 and 10 are erected on both sides of a waterway leading to a river in the width direction (in FIG. 1, only a pair of gate pillars 10 and 10 in one of the width directions are shown). An operation table 11 is laid across the upper part of each gate pillar 10. The door body 2 is arranged so as to be able to move up and down between the gate pillars 10 and 10 while being held immovably on the upstream side and the downstream side. A gantry 12 is arranged on the operation table 11, and a floodgate opening / closing device is provided on the gantry 12.

The floodgate G opens by raising the door body 2, and closes by lowering the door body 2 to the bottom (descent limit) Ga of the water channel or the like. Then, by adjusting the height (openness) of the door body 2 with respect to the bottom Ga, the amount of water passing through the floodgate G can be adjusted.

Next, an embodiment of the floodgate opening / closing device 1 according to the present invention will be described with reference to FIGS. 1 to 3.
In the water gate opening / closing device 1 of the present embodiment, the chain 3 having one end connected to the door body 2, the driving device 4 for applying a rotational driving force, and the intermediate portion of the chain 3 are wound around and rotationally driven by the driving device 4. The drive sprocket 5 is provided, a chain storage portion 25 for storing the other end side of the chain 3, and a chain guide 6 arranged between the drive sprocket 5 and the chain storage portion 25.

As the chain 3, a single-row or multi-row roller chain can be adopted depending on the size including the width and height of the door body 2 and the weight of the door body 2. In the present embodiment, as shown in FIG. 4, the outer plates of the two single-row roller chains are placed in close contact with each other and arranged in parallel, and a connecting pin is provided over the outermost outer plate to provide one. It constitutes a two-row roller chain. In the following description, only the outermost plate group 30 and the outermost plate in the outermost plate group 30 are the outermost plates of the outermost plate group 30 by combining the outer plate and the inner plate of each single row roller chain on the outer side of the two-row roller chain. It is referred to as an outer plate 3a. Further, in the chain 3, one chain 3 can be connected to the center of the door body 2 as needed, and two chains 3, 3 are connected in pairs near both ends of the upper portion of the door body 2, respectively. It can also be connected to. Further, the connection of the chain 3 to the door body 2 is not limited to the configuration in which one end of the chain 3 is directly fixed to the upper part of the door body 2, and although not shown, it moves to the upper part of the door body 2. A sprocket may be provided, and an intermediate portion on the one end side of the chain 3 may be wound around the moving sprocket, and the tip thereof may be fixed to, for example, the lower surface of the operation table 11.

The chain 3 is provided with a plurality of hooking portions 29 protruding from the outermost plate 3a at regular intervals in the longitudinal direction of the chain 3. The configuration of the hooking portion 29 is not particularly limited, and can be configured by extending specific connecting pins at regular intervals in the longitudinal direction of the roller chain, and the illustration is omitted. However, pins other than the connecting pins of the roller chain may be provided on the specific outermost plate 3a at regular intervals in the longitudinal direction of the roller chain. Further, the hooking portion 29 may include a roller that rotates around the extended connecting pin or a pin other than the connecting pin and rolls with respect to the flange 62 of the guide rail 60 described later.

The drive device 4 is not particularly limited, and for example, an electric motor can be adopted. A deceleration mechanism (not shown) can be interposed between the output shaft of the drive device 4 (not shown) and the rotating shaft of the drive sprocket 5 (not shown), if necessary. The rotation axis of the drive sprocket 5 can have its lower center axis parallel to the water flow flowing through the floodgate G or parallel to the width direction of the floodgate G. When using a plurality of chains 3, 3, ... As described above, the number of drive sprockets 5 corresponding to the chains 3 is provided. In this case, each drive sprocket 5 may be attached to a common rotating shaft, or may be attached to an individual rotating shaft.

The chain storage portion 25 in the present embodiment includes a pair of hook rails 26, 26 for hooking the hook portions 29 of the chain 3, respectively, and a support main body 27 for upward supporting the hook rails 26, 26. It is equipped with. The support body 27 is arranged on the gantry 12.

The pair of hook rails 26, 26 extend in the bending direction of the chain, respectively, and are slightly wider than the width between the outermost plates of the chain, so that the hook portions 29 on both sides of the chain 3 can be hooked. And are arranged parallel to each other. The end portion (left end portion in the drawing) on the drive sprocket 5 side of the hook rail 26 constitutes the receiving portion 26a of the chain 3.

The height of the end portion (right end portion in the figure) 26b on the side away from the drive sprocket 5 of the support main body 27 is set lower than the height of the end portion 26a on the side closer to the drive sprocket 5. Therefore, the hook rails 26, 26 are inclined so that the end portion 26a on the drive sprocket side is higher than the end portion 26b on the opposite side. Further, the tip of the other end of the chain 3 is fixed to the upper end of the low support main body 27 on the side away from the drive sprocket 5. With this configuration, when each hooking portion 29 of the chain 3 is hooked on the end portion 26a on the drive sprocket 5 side which is the receiving portion of the hooking rail 26, the hooking portion 29 is driven on the hooking rail 26 by the weight of the chain 3. It will move sequentially from the sprocket 5 side toward the opposite end 26b (FIG. 3).

Further, the height of the hook rail 26 from the upper surface of the gantry 12 at the end portion 26b (FIG. 3) opposite to the drive sprocket 5 is the length between the hook portions 29 and 29 in the longitudinal direction of the chain 3. It is set to be higher than almost half the length of the pitch). Therefore, in a state where the hooking portion 29 of the chain 3 is hooked on the hooking rail 26 and suspended, the folded lower end between the hooking portions 29 and 29 of the chain 3 does not come into contact with the gantry 12.
The chain accommodating portion 25 is not limited to the present embodiment in which the chain 3 between the engaging portions 29 is suspended, and other types can be adopted.

In the present embodiment, the positional relationship between the drive sprocket 5 and the end portion 26a on the drive sprocket 5 side of the hook rail 26 in the height direction is such that the hook rail 26 suspends the chain 3 above the support main body 27. Since the hook rail 26 is supported by the obtained height and is inclined so that the end portion 26a on the drive sprocket 5 side of the hook rail 26 is higher than the end portion 26b (FIG. 3) on the opposite side, the hook rail 26 is supported. The end portion (that is, the receiving portion of the chain 3) 26a on the drive sprocket 5 side of the drive sprocket 5 is located higher than the rotation axis of the drive sprocket 5.

In the case of the embodiment shown in FIG. 4A, the chain guide 6 is composed of a pair of guide rails 60, 60 arranged in parallel with each other at predetermined intervals. Each guide rail 60, in this embodiment, has a web 61 and flanges 62, 62 integrally molded at both ends of the web 61 in the width direction over the entire length, and the cross section is formed in a U shape. There is. The guide rail 60 in the embodiment shown in FIG. 4A is the outermost plate group 30 of the chain 3 having a two-row width of the web 61 (that is, the distance between the flanges 62 and 62). The end face is slidably held, and the widths of both flanges 62 and 62 are slightly smaller than the combined dimensions of the thickness of the outermost plate group 30 and the length of the hooking portion 29 protruding from the outermost plate 3a. It is set to a large value. In the embodiment shown in FIG. 4A, the outermost plate group 30 of the two-row chain 3 is held between the pair of flanges 62, 62. That is, both side portions of the chain 3 supported by the chain guide 6 are composed of the outermost plate group 30. Therefore, since the outermost plate group 30 is held between the pair of flanges 62 and 62, the chain 3 is fed along the shape of the guide rail with its bending restricted. The cross-sectional shape of the guide rail 60 is not limited to the U-shape as long as it can be slidably held so as to prevent the chain 3 from bending. As an example of another guide rail, for example, as shown in FIG. 4B, both ends 3b and 3b of each connecting pin of the chain 3 are projected outward, and the guide rails 60'and 60'are the outermost guide rails, respectively. The plates 3a and 3a are in sliding contact with each other, and the portions 3b and 3b projecting to the outside of each connecting pin are slidably held and passed through the hooking portions 29 provided at predetermined intervals in the length direction of the chain 3. It can also be configured by a pair of rails 60a'and 60a' having an L-shaped cross section, respectively. In this case, the outwardly projecting portions 3b and 3b of each connecting pin constitute both side portions of the chain 3 held by the chain guide 6. Then, in the chain 3, since the portions 3b and 3b protruding to the outside of each connecting pin are held by the pair of rails 60a'and 60a' having a cross-sectional shape L, the bending is restricted and the shape of the guide rail is restricted. Will be sent along.

Further, in the guide rail 60 in the embodiment shown in FIG. 2, the lower guide portion 60a, the upper guide portion 60b, and the intermediate portion 60c are integrally continuous in the length direction thereof, and the overall shape is substantially S-shaped. It is molded into a shape.

In the lower guide portion 60a, the end portion of the upper flange 62a in FIG. 2 is located above the drive sprocket 5, and the end portion of the lower flange 62b is located below the drive sprocket 5. Then, the lower guide portion 60a extends once below the position of the drive sprocket 5, and then the radius of curvature R1 (with respect to the radius of curvature of the guide rail 60, the outside and the inside (upper)) to the extent that the chain 3 is smoothly sent out. The curvature between the flanges 62a and 62b located below). The curvature in the following other portions shall be the same.) In the embodiment shown in FIG. 2, the portion 60a extending in the horizontal direction is bent. It is formed by being bent upward with a radius of curvature R2 via'.
The lower guide portion is not limited to the embodiment shown in FIG. 2, and has a portion 60a'extending in the horizontal direction in the embodiment shown in FIG. 2, as shown in FIG. Instead, it can be formed into a shape continuous with the intermediate portion 60c by extending once below the position of the drive sprocket 5 and then bending upward with a predetermined radius of curvature R3.
The intermediate portion 60c is continuously formed from the lower guide portion 60a, and extends vertically in the embodiments shown in FIGS. 1 to 3.

On the other hand, the upper guide portion 60b is continuously bent from the intermediate portion 60c with a radius of curvature R4 such that the chain 3 is smoothly sent out. Then, the ends of the upper flange 62a and the lower flange 62b of the upper guide portion 60b in FIGS. 2 and 3 attach the hooking portion 29 of the chain 3 extruded when the door body 2 is raised to the hooking rail 26. It is set at a position where it can be hooked up and the hooking portion 29 of the hooking rail 26 can be pulled in when the door body 2 is lowered.

Next, the operation of the floodgate opening / closing device in the above-described embodiment will be described.

When the door body 2 is raised to open the water gate G from the closed state, or when the degree of opening of the water gate G is increased, the drive sprocket 5 is opened in the opening direction by the drive device 4 (right in FIGS. 2 and 3). Rotate drive around). Since the intermediate portion of the chain 3 is wound around the drive sprocket 5, the chain 3 is sent toward the chain storage portion 25. At this time, since the bending of the chain 3 is restricted by the guide rail 60, the chain 3 is pushed out in the guide rail 60 and fed along the longitudinal direction of the guide rail 60. That is, the drive sprocket 5 is once moved downward by the lower guide portion 60a, and then turned upward. Subsequently, the chain 3 is pushed out to the upper guide portion 60b via the intermediate portion 60c extending in the direct direction of the guide rail 60, bent by the upper guide portion 60b with a predetermined curvature, and sent downward to the guide rail. It is sent downward from the end of the 60 on the chain storage portion 25 side. Therefore, the chain 3 wound around the drive sprocket 5 can be reliably sent to the chain receiving portion 26a of the chain storage portion 25 located above the drive sprocket 5 only by rotationally driving the drive sprocket 5.

Since the end portion of the guide rail 60 on the drive sprocket 5 side of the hook rail 26 of the chain storage portion 25 is arranged below the end portion of the guide rail 60 on the chain storage portion 25 side, the end of the guide rail 60 on the chain storage portion 25 side. In the chain 3 sent out from the portion, the hooking portions 29 provided at predetermined intervals in the longitudinal direction thereof are surely received on the hooking rail 26 and are sequentially hooked. Then, due to the inclination of the hook rail 26, the hook portion 29 received on the hook rail 26 sequentially moves toward the end portion 26b (FIG. 3) on the opposite side of the drive sprocket 5. .. In the chain 3, the space between the hooking portions 29 and 29 hooked on the hooking rail 26 enters between the pair of hooking rails 26 and 26, and the chain 3 is folded back at each hooking portion 29 to each hook. It is suspended in a substantially U-shape at a height of half the length between the portions 29 and 29.

Finally, the hooking portion 29 hooked on the hooking rail 26 of the chain storage portion 25 is sent out from the guide rail 60 of the chain guide 6, and then hooked on the hooking rail 26 of the chain storage portion 25. Due to the weight of the chain 3 between the hooking portion 29 to be stopped, the weight of the chain 3 to which the intermediate guide portion 60c is sent from the lower guide portion 60a of the guide rail 60 toward the upper guide portion 60b is reduced. Will be done. Therefore, in the present embodiment, when the door body 2 is raised, the drive sprocket 5 at a lower position is stored in a chain at a higher position without applying a large load to the drive device 4 that rotationally drives the drive sprocket 5. The chain 3 can be sent and stored in the chain receiving portion 26a of the portion 25 with a small driving force.

On the other hand, when the door body 2 is lowered to close the water gate G from the open state, or when the degree of opening of the water gate G is reduced, the chain 3 is sent to one end side by the weight of the door body 2. Either allow the drive sprocket 5 to rotate (ie, passively rotate the drive sprocket 5), or rotate the drive sprocket 5 in the closed direction (counterclockwise in FIGS. 2 and 3) as needed. (That is, the drive sprocket 5 is actively rotated), and the chain 3 is sent to one end side. At this time, the chain 3 stored in the chain storage portion 25 is pulled into the chain guide 60 from the chain receiving portion 26a of the chain storage portion 25 located above, and the upper guide portion 60b and the intermediate portion 60c of the chain guide 60 are drawn. It is stably and surely fed toward the drive sprocket 5 located below via the lower guide portion 60a, and is pulled out to one end side. The weight of the chain 3 when it is pulled into the chain guide 6 from the chain receiving portion 26a of the chain storage portion 25 is reduced by the weight of the chain 3 due to the height difference between the upper guide portion 60b and the lower guide portion 60a of the chain guide 6. Therefore, even when it is necessary to rotationally drive the drive sprocket 5 in the closing direction, the drive sprocket 5 can be rotated with a small driving force.

Next, a second embodiment of the floodgate opening / closing device of the present invention will be described with reference to FIGS. 4 to 5. In this second embodiment, the same or equivalent configurations as those in the first embodiment described above are designated by the same reference numerals, the description thereof will be omitted, and only different configurations will be described.

The chain guide 6 in the first embodiment described above has a web 61 and upper and lower flanges 62a and 62b on the drawing as a whole over the lower guide portion 60a, the intermediate portion 60c, and the upper guide portion 60b. Whereas the chain guide 6 in the second embodiment does not have the upper guide portion 60b provided with the lower flange 62b in the first embodiment, the chain guide 6 is composed of the character-shaped guide rail 60. Instead, it is equipped with an idle sprocket 7.

The idle sprocket 7 is rotatably supported by a rotating shaft (not shown), around which a chain 3 is wound, and is driven as the chain 3 is fed to one end side or the other end side thereof. Rotate. The weight of the chain 3 from the idle sprocket 7 to the lower guide portion 60a is reduced by the weight of the chain 3 from the idle sprocket 7 until the hooking portion 29 is supported by the hooking rail 26. It is similar to the form of. The idle sprocket 7 supports the weight of the chain 3 wound around the idle sprocket 7 up to the lower guide portion 60a and the weight of the hook portion 29 until the hook portion 29 is supported by the hook rail 26 of the chain storage portion 25. Therefore, the frictional resistance of the chain 3 with respect to the lower flange 62b of the upper guide portion 60b in the first embodiment is significantly reduced, and the chain 3 is smoothly fed by the rotation of the idle sprocket 7, so that the chain 3 is fed. Does not hit the upper flange 62a of the upper guide portion 60b. Therefore, in the second embodiment, the chain 3 can be smoothly fed even if the radius of curvature R4 of the upper guide portion 60b is smaller than that in the first embodiment. Therefore, in this second embodiment, the driving force can be further reduced because the driving sprocket is further rotated as compared with the first embodiment.

In the first and second embodiments described above, the case where the intermediate portion 60c of the guide rail 60 constituting the chain guide 6 is vertically arranged is shown, but in any of the embodiments, if necessary. , The intermediate portion 60c can be tilted so that the horizontal relative positions of the lower guide portion 60a and the upper guide portion 60b are brought closer to each other or separated from each other.

Further, in the first and second embodiments described above, the sliding resistance of the chain 3 is reduced on the inner surfaces of the guide rails 60 constituting the chain guide 6, particularly the lower guide portion 60a and the upper guide portion 60b. Therefore, for example, a sheet material coated with a fluororesin can be attached to fix the sheet material.

Further, in the first and second embodiments described above, the radius of curvature R1, R2, R3 of the lower guide portion 60a of the guide rail 60 constituting the chain guide 6, and the radius of curvature R4 or the idle sprocket of the upper guide portion 60b. The diameter of 7 can be set to such an extent that the angle at which the chain 3 fed while being restricted from bending along the shape of the guide rail 60 hits the inner surface of the guide rail 60 can be made gentle. The radii of curvature R1, R2, and R3 of the lower guide portion 60a may be the same, and may be different as necessary.

Next, a third embodiment of the floodgate opening / closing device of the present invention will be described with reference to FIG. 7. In this third embodiment, the same or equivalent configurations as those in the first and second embodiments described above are designated by the same reference numerals, the description thereof will be omitted, and only different configurations will be described.

The sluice gate opening / closing device in this embodiment is located between the guide rails 60 and 60, and is located outside the bent portion of the lower guide portion 60a of the guide rail 60 at the radius of curvature R1 and R2. A plurality of chain support rollers 63 are arranged along the line. Since the chain 3 is composed of a two-row roller chain as described above, each chain support roller 63 is a cylindrical roller 31, 31 (FIG. 4) extrapolated to a connecting pin in each row of the chain 3. It is composed of a pair so as to be in contact with each other. When the lower guide portion 60a of the guide rail 60 is bent at the radius of curvature R3 as shown in FIGS. 3 and 6, a plurality of chain support rollers 63 are arranged outside the bent portion at the radius of curvature R3. Will be set up. The number of chain support rollers 63 provided is not particularly limited, and can be set according to the size of the radius of curvature of the lower guide portion 60a and the like. In the present embodiment, the upper guide portion 6b of the chain guide 6 has a configuration of either the first embodiment (see FIGS. 1 to 3) or the second embodiment (see FIGS. 5 and 6). can do.

As described above, when the drive sprocket 5 is rotationally driven in the opening direction by the drive device 4 and the chain 3 whose bending is restricted by the guide rail 60 is sent toward the chain storage portion 25, the chain 3 to be sent is the guide rail. The portion bent by the radius of curvature R1 and R2 of the lower guide portion 60a of 60 is pressed toward the outside. Therefore, it is conceivable that the frictional resistance of the chain 3 with respect to the guide rail 60 becomes large, a load is applied to the rotational driving force of the drive sprocket 5, and the chain 3 and the guide rail 60 are worn. However, in the present embodiment, the chain support roller 63 receives a force of pressing the lower guide portion 60a of the guide rail 60 toward the outside of the chain 3 at the portion bent by the radii of curvature R1 and R2. Therefore, the frictional resistance of the chain 3 with respect to the guide rail 60 can be reduced.

In the present invention, since the chain 3 can be fed in a state where bending is restricted along the shape of the guide rail 60 by the guide rail 60 having an extremely simple configuration, the position of the chain receiving portion of the chain storage portion is particularly the drive sprocket. Even if it is arranged higher than the position of, it does not require a mechanism such as the rotation transmission means described in the conventional technique or power for rotationally driving the guide sprocket other than the drive device 4. , It can be sent from the drive sprocket 5 located below to the receiving portion 26a of the chain accommodating portion 25 located above.

Then, the weight of the chain 3 from the upper guide portion 60b to the lower guide portion 60a side is reduced by the own weight from the upper guide portion 60b to the hook portion 29 already hooked on the hook rail 26, so that the drive is driven. The driving force required to drive the sprocket 5 to rotate can be made extremely low.

The present invention is not limited to the above-described embodiment, and the case where the position of the chain receiving portion of the chain accommodating portion is arranged at the same height as the position of the drive sprocket, and the case of the chain accommodating portion. Even when the position of the chain receiving part is lower than the position of the drive sprocket, the chain whose one end is connected to the door body is surely connected to the chain receiving part of the chain storage part by the rotation of the drive sprocket. Can be sent. In any case, the end portion of the chain storage portion 25 of the chain guide 6 on the receiving portion 26a side is arranged above the receiving portion 26a.

G: Water gate, 1: Water gate opening / closing device, 2: Door body, 3: Chain, 4: Drive device, 5: Drive sprocket, 6: Chain guide, 7: Idle sprocket, 25: Chain storage, 26: Stop rail , 29: Hooking part, 60: Guide rail, 60a: Lower guide part, 60b: Upper guide part, 60c: Intermediate part, 63: Chain support roller

Claims (5)

A chain having one end connected to the door body, a drive sprocket around which the chain is wound to move the door body up and down by sending the chain, and a chain storage unit for storing the other end side of the chain are provided. It is a water gate opening and closing device
A chain guide that regulates bending of the chain is placed over the entire range of the chain extending between the drive sprocket and the chain housing .
The chain guide is a floodgate opening / closing device characterized by being composed of guide rails that slidably hold both end faces in the thickness direction of the chain . The chain has hooking portions protruding from both sides of the chain at predetermined intervals in the longitudinal direction thereof.
The chain accommodating portion has a pair of hooking rails for hooking the hooking portions on both sides of the chain.
The water gate opening / closing device according to claim 1 , wherein the guide rails are provided in pairs so as to slidably hold both side portions of the chain. The chain guide
A lower guide portion that guides the chain to be delivered to and from the drive sprocket below the drive sprocket, and a lower guide portion.
An upper guide portion that guides the chain to be delivered to and from the chain storage portion above the chain storage portion, and an upper guide portion.
An intermediate portion that guides the chain between the lower guide portion and the upper guide portion,
The sluice gate opening / closing device according to claim 1 or 2, wherein the sluice gate opening / closing device is provided. The water gate opening / closing device according to claim 3, wherein the upper guide portion includes an idle sprocket in which the chain is wound and driven to rotate when the chain is fed. The water gate opening / closing device according to claim 3, wherein a chain support roller is provided on the outside of the bent portion of the lower guide portion.

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