JP2006299666A - Stop-log - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stop-log improved in durability while securing high water cut-off performance with a simple constitution. <P>SOLUTION: This stop-log 1 is laid in a damp part having a groove-shaped receiving frame installed on both side walls of a waterway and a plane-shaped support frame installed in a bottom part of the waterway; and is constituted by arranging self-seal packing 11 for cutting off water over the total length by bringing a fin into close contact with the receiving frame or the support frame by water pressure generated by a water level difference, along a part being a surface 10a positioned on the downstream side and fitted in the receiving frame and a bottom part side surface 10f abutting on the support frame. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an improvement in corner dropping used for damming a water channel.

In a sewage treatment plant or the like, a weir is constructed in a waterway, and a water drop is adjusted by opening and closing the waterway by attaching and removing a corner dropper to the weir.
Conventional corner dropping is configured to perform water stop with improved watertightness by attaching a packing such as a flat rubber along a portion that contacts a receiving frame provided in a weir. Such packing uses a relatively hard rubber to increase durability.

  However, since the rubber is hard, if a foreign object is caught between the packing and the receiving frame, a large gap is generated, and it is difficult to ensure water tightness. For this reason, a configuration in which a soft rubber packing is provided in place of the hard rubber has been studied, but the soft rubber is often greatly deformed and damaged by water pressure, and there is a problem in terms of durability.

Therefore, a corner drop has been developed that has improved durability while ensuring water tightness. Patent Document 1 discloses such corner dropping.
The corner drop disclosed in Patent Document 1 employs a structure in which hard rubber and soft rubber are combined. The soft rubber that can be easily deformed secures high water tightness and hard when the soft rubber is deformed to some extent. The rubber abuts to prevent excessive deformation of the soft rubber to prevent breakage.
That is, the corner drop disclosed in Patent Document 1 is intended to improve durability while ensuring water tightness.
JP-A-11-158850

  However, in the corner drop disclosed in Patent Document 1, both the soft and hard rubber packings have a flat plate shape, and the contact area between the packing and the receiving frame is large. For this reason, although water tightness is ensured, if the angle drop is pulled out in a state where water pressure is applied, the packing is easily damaged by rubbing against the receiving frame, and there is a problem in terms of durability.

  In addition, the corner drop disclosed in Patent Document 1 is a structure in which a plurality of corner drop pieces are stacked on a weir portion to stop water, but the water tightness of the bottom part of the corner drop piece located at the lowest stage is not achieved. In other words, they were dissatisfied with water stoppage.

  This invention is proposed in view of the said situation, and it aims at providing the corner drop which ensured high water-stopping property by simple structure, and also improved durability.

  The invention according to claim 1, which is proposed to achieve the above object, includes a groove-shaped receiving frame constructed on both side walls of a water channel and a flat support frame constructed on the bottom of the water channel. A corner drop that is laid down, and is provided on the downstream side of the fin receiving frame or by the water pressure generated by the water level difference along the portion that fits into the receiving frame and the bottom side surface that contacts the support frame. The self-sealing packing that is in close contact with the support frame and stops water is provided over the entire length.

  According to the present invention, the corner drop is provided with a self-seal packing along a portion that is located on the downstream side of the weir portion and that fits into the receiving frame. Therefore, when the corner drop receives water pressure, the self-seal packing itself is pressed against the receiving frame, and further, the fins of the self-seal packing are pressed and deformed by the water pressure that circulates from the upstream side of the receiving frame and is closely attached to the receiving frame. .

  Similarly, the corner drop comprises a self-seal packing along the bottom side that abuts the support frame. Therefore, when the corner drop is laid on the weir, the self-seal packing itself is pressed against the support frame by the dead weight of the corner drop, and further, the self-seal packing fins are pressed and deformed by the water pressure from the upstream side, and are in close contact with the support frame. To do.

  In other words, according to the present invention, when the corner drop laid on the weir is subjected to water pressure, the self-seal packing itself is pressed against the receiving frame and the supporting frame, and the fins follow the receiving frame and the supporting frame by the water pressure. It deforms and adheres. Thereby, it becomes possible to ensure high water tightness compared with packings, such as flat rubber.

  In particular, even when a foreign object is caught between the packing and the receiving frame or the support frame, the fin is deformed so as to cover the clearance around the foreign object, and the tip of the fin is in close contact with the receiving frame or the support frame. Sex is secured.

  In addition, according to the present invention, by appropriately setting the hardness of the self-sealing packing, it is possible to reduce the contact area of the fin with the receiving frame in a state where water pressure is applied. This prevents the packing from being damaged even if the angle drop is lifted in a state where water pressure is applied.

In the present invention, the self-seal packing may be attached as it is to the surface or bottom side surface located on the downstream side of the corner drop, or may be attached by embedding the self-seal packing so that the base of the fin retracts from each surface. .
By embedding self-sealing packing, even if excessive water pressure is applied or foreign matter is caught, each surface comes into contact with the receiving frame, support frame, or foreign matter, so it deforms into a region that occurs between the base of the fin and the outer surface. The fins are accommodated, so that excessive deformation of the fins is prevented and breakage can be effectively prevented.

  In the present invention, it is also possible to attach a fixture such as a wedge to a corner drop laid on the weir. In other words, it is also possible to attach a wedge or the like between the surface located upstream of the corner drop and the receiving frame. By mounting a fixing tool such as a wedge, the self-seal packing can be pressed against the receiving frame at a predetermined pressure regardless of the water pressure, and stable water-stopping can be ensured.

  The invention according to claim 2 is a corner drop laid on a weir portion provided with groove-shaped receiving frames laid on both side walls and the bottom of a water channel, and is a surface located on the downstream side, the receiving frame A self-seal packing is provided over the entire length along the part that is inserted into the frame, and stops the water by pressing the fin against the frame by the water pressure generated by the water level difference.

  The invention according to claim 1 is a corner drop laid on a weir portion provided with receiving frames on both side walls of the water channel and a flat support frame at the bottom of the water channel. On the other hand, this invention is a corner drop laid in the dam part provided with the receiving frame in the both-sides wall and bottom part of a water channel.

According to the present invention, high water tightness is ensured for the same reason as described in the first aspect, and it is possible to prevent the packing from being damaged even when the angle drop is pulled up with water pressure applied. It becomes possible.
Further, similarly to the invention described in the first aspect, also in the present invention, it is possible to secure stable water stoppage by using a fixture such as a wedge together.

  According to a third aspect of the present invention, in the corner drop according to the first or second aspect, the self-seal packing is such that an outer surface is located at a portion protruding a predetermined length from the root of the fin of the self-seal packing. A plate-shaped packing is provided along the line.

According to the present invention, even when an excessive water pressure is applied or foreign matter is caught, the flat packing contacts the receiving frame, the support frame or the foreign matter, so that the gap between the fin base and the outer surface of the flat packing is between The deformed fin is accommodated in the region generated in the above, and excessive deformation of the fin is prevented. This makes it possible to effectively prevent the fins from being damaged.
Further, since the flat packing contacts the receiving frame and the support frame, the water-tightness is higher than the configuration in which the self-sealing packing is embedded in the corner drop itself.

  In the present invention, it is preferable to use a rubber material having a higher hardness than the self-sealing packing as the flat packing. Thereby, it is possible to improve watertightness, preventing damage to the self-sealing packing.

  According to a fourth aspect of the present invention, in the corner drop according to any one of the first to third aspects, the plurality of divided corner drop pieces are stacked and each of the corner drop pieces is formed on the receiving frame. At least the self-seal packing is provided over the entire length in the part corresponding to the part fitted into the part and the part in contact with the support frame.

  According to the present invention, even a large weir portion can form a corner drop by a plurality of divided corner drop pieces, and each corner drop piece is reduced in weight to facilitate laying work. It becomes possible.

  In this invention, the seal | sticker of the corner drop pieces to pile up can take a various structure. For example, it is possible to adopt a configuration in which a concave strip is provided over the entire length on the bottom side surface of the corner drop piece positioned above, and a convex strip is provided over the entire length on the upper side surface of the corner drop piece positioned below.

  According to this configuration, it is possible to secure the high water tightness by fitting the concave and convex portions of the upper and lower corner dropping pieces. Moreover, it is also possible to take the structure which improved the water-tightness further by sticking a rubber packing along a concave line and a convex line.

  According to a fifth aspect of the present invention, in the corner drop according to any one of the first to fourth aspects, the self-seal packing includes a single or a plurality of fins along the longitudinal direction. Yes.

According to the present invention, a highly water-tight self-sealing packing can be formed with a simple configuration, and cost saving can be achieved.
In the present invention, only one fin may be provided along the longitudinal direction of the packing, or two or more fins may be provided. By providing two or more strips, the plurality of fins are in close contact with the receiving frame and the support frame as compared with the configuration in which only one strip is provided, so that the water tightness can be further improved.

  According to a sixth aspect of the present invention, in the corner drop according to any one of the first to fifth aspects, the self-seal packing includes a cavity extending in the longitudinal direction inside the fin.

  Here, the fins of the self-sealing packing are required to have a function of being in close contact with the receiving frame or the support frame by being deformed by receiving water pressure. Accordingly, the fins are required to have appropriate flexibility as compared with the base part of the self-sealing packing, and the fins themselves must be thinned or the hardness of the material must be reduced as compared with the base part, and are easily damaged.

  According to the present invention, the flexibility and strength of the fin can be easily adjusted by appropriately setting the position and cross-sectional area of the cavity extending inside the fin. Thereby, it is possible to easily manufacture an optimum self-sealing packing according to the water pressure applied to the corner drop.

  A seventh aspect of the present invention is the corner dropping according to any one of the first to sixth aspects, wherein the self-seal packing is composed of chloroprene rubber or silicon rubber having a hardness of 40 degrees to 60 degrees. ing.

The present invention specifically shows the hardness and material of the self-sealing packing.
According to the present invention, a self-sealing packing can be easily manufactured using general-purpose chloroprene rubber or silicon rubber, and cost can be reduced.
When the rubber hardness of the self-seal packing is less than 40 degrees, the fins are easily deformed by being submerged by water pressure, and the adhesion with the receiving frame and the support frame is lowered and the durability is deteriorated. When the rubber hardness exceeds 60 degrees, the amount of deformation of the fin due to water pressure is reduced, and the adhesion to the receiving frame and the support frame is hindered. The hardness of the rubber is preferably in the range of 40 to 60 degrees, and the highest watertightness and durability can be obtained near 50 degrees.

  The invention according to claim 8 is configured to be made of synthetic wood made of a long fiber reinforced hard synthetic resin foam in the corner dropping according to any one of claims 1 to 7.

Here, the synthetic wood has a specific gravity of about 0.5 to 1.0 and is lightweight and has a high laying property.
However, by making the above-described corner drop of the present invention with synthetic wood, it is possible to ensure water-tightness by self-seal packing, and it is possible to provide a corner drop with improved laying property and water stoppage.

  As a kind of foamed resin, for example, a hard resin that is a thermosetting resin such as a urethane resin, an epoxy resin, a vinyl ester resin, an unsaturated polyester resin, or a phenol resin is preferably used. In order to improve compressive strength and reduce costs in the foamed resin, inorganic fillers such as calcium carbonate, gypsum, talc, aluminum hydroxide, clay, and lightweight bones such as shirasu balloon, pearlite, glass balloon, etc. Materials may be added.

  Examples of fibers that reinforce the hard synthetic resin foam include inorganic fibers such as glass fibers, carbon fibers, metal fibers, and ceramic fibers, synthetic fibers such as aromatic polyamide fibers, and organic fibers such as natural fibers. Glass fiber is suitable from the viewpoint of strength and economy. The fiber is preferably in the form of long fibers such as yarn, cloth, roving, roving cloth, and cloth mat. Short fibers such as chips and middle fibers and hollow fillers such as shirasu balloons are used in combination as necessary. You may do it.

  Examples of the glass fiber include glass roving, glass roving cloth, glass mat, and continuous strand mat. These fibers may be used alone, or may be used by laminating two or more layers, or a mixture of long fibers and short fibers may be used. The most preferred material is a foam reinforced with long glass fibers that are made of hard urethane resin aligned in the longitudinal direction. For example, trade name “Eslon Neo Lumber FFU” manufactured by Sekisui Chemical Co., Ltd. may be mentioned.

  Here, the stress applied to the corner drop is mainly caused by a bending moment with the receiving frame of the weir portion as a fulcrum, and a high bending rigidity (EI) in the longitudinal direction is required. Therefore, the synthetic wood used for the corner drop is one in which the fiber direction is aligned with the longitudinal direction of the corner drop or the laminate of synthetic woods with different fiber directions improves the bending rigidity in the longitudinal direction. Is preferred.

  According to the present invention, it is possible to provide a high water-stopping property even when a foreign object is sandwiched by a simple configuration, and to provide a corner drop that improves durability by preventing damage to the packing due to repeated attachment and detachment. It becomes possible.

Embodiments of the present invention will be described below with reference to the drawings.
1 is a perspective view showing a corner drop according to an embodiment of the present invention, FIG. 2A is a perspective view showing a self-seal packing employed for the corner drop of FIG. 1, and FIG. 2B is a direction A in FIG. An arrow view, FIG.2 (c) is a B direction arrow view of FIG. 1, FIG. 3 is a perspective view which shows the dam part which lays the corner drop of FIG.

  4 (a) and 4 (b) are cross-sectional views taken along arrows CC and DD in FIG. 3 when the corner drop 1 is laid on the weir portion of FIG. 3, and FIG. 5 (a). , (B) is a cross-sectional view taken along arrows CC and DD in FIG. 3 when a corner drop 1 is laid on the weir portion of FIG. 3 using a wedge, and FIGS. 6 (a), (b). ) Is an explanatory view showing a state in which foreign matter is sandwiched in FIGS. 4 (a) and 4 (b). FIGS. 7A and 7B are explanatory views showing a modified example of the self seal packing, and FIG. 8 is an explanatory view showing a modified example of the mounting structure of the self seal packing.

The corner drop 1 of this embodiment has a structure in which packings 11 and 12 are attached to a plate-like main body 10 as shown in FIG.
The main body 10 is a rectangular flat plate material having a downstream flat surface 10a, an upstream flat surface 10b, a left side surface 10c, a right side surface 10d, an upper side surface 10e, and a bottom side surface 10f. In the present embodiment, the glass fiber reinforced rigid urethane resin foam is used. Made of synthetic wood made from the body.

  As shown in FIG. 2A, the packing 11 is a self-sealing packing 11 having a shape in which fins 11a and 11a protrude from a flat base portion 11b. In this embodiment, chloroprene rubber having a hardness of about 50 degrees is used. Molded and manufactured.

The fin 11a has a tapered fin shape that protrudes in the thickness direction of the base portion 11b and is inclined in the width direction, and is provided along the longitudinal direction of the base portion 11b.
The fin 11a is deformed in a direction to stand up with respect to the base 11b when subjected to water pressure from the inclined direction side, and has a self-sealing function for bringing the fin 11a into close contact with a receiving frame and a support frame described later by deformation due to water pressure. .

  The packing 12 is a flat rubber packing as shown in FIGS. 1 and 2B, and is made of chloroprene rubber having higher hardness than the self-sealing packing 11 in this embodiment.

The self-seal packing 11 and the packing 12 are attached to the left and right end portions and the bottom side surface 10f of the downstream flat surface 10a of the main body portion 10.
As shown in FIGS. 1 and 2B, the packings 11 and 12 on the downstream plane 10a are provided on both sides of the self-seal packing 11 over the entire length in the left and right ends of the downstream plane 10a. 12 is attached along. At that time, the self-seal packing 11 is arranged such that the fins 11a are inclined outwardly from the left and right ends of the main body 10.

The packings 11 and 12 on the bottom side surface 10f are attached in the same manner. That is, as shown in FIGS. 1 and 2C, the packings 12 and 12 are attached along both sides of the self-seal packing 11 over the entire length of the bottom side surface 10f. At that time, the self-seal packing 11 is arranged so that the fins 11 a are inclined toward the upstream plane 10 b side of the main body 10.
In this embodiment, the self-seal packing 11 and the packings 12 and 12 are bonded and fixed to the main body 10 using a resin adhesive.

  When the self-seal packing 11 and the packing 12 are attached to the main body 10, the outer surface of the packing 12 protrudes from the root of the fin 11 a of the self-seal packing 11 as shown in FIGS.

  Further, as shown in FIG. 1, handles 13 and 13 are fixed to the upper part of the main body 10 of the corner drop 1. The handles 13 are alternately provided on the downstream plane 10a and the upstream plane 10b of the main body 10 one by one, and the upper ends of the handles 13 are shaped to be away from the planes 10a and 10b.

The corner drop 1 of the present embodiment has the above-described configuration, and is laid on a dam portion 20 provided in the water channel 2 as shown in FIG.
The dam portion 20 includes groove-shaped receiving frames 22 and 22 each having a U-shaped cross section that is erected on both side walls 21 and 21 of the water channel 2 and a flat support frame 24 that is erected on the bottom 23 of the water channel 2. I have.
That is, the dam portion 20 has a structure in which the left and right ends of the corner drop 1 are received by the frames 22 and 22 and the bottom portion is supported by the support frame 24.

  When laying the corner drop 1 of FIG. 1 on the weir 20 of FIG. 3, the downstream plane 10 a of the corner drop 1 is made to coincide with the downstream side of the water channel 2, and the left and right ends of the corner drop 1 are received by the receiving frames 22, 22. Until the bottom side surface 10f abuts against the support frame 24.

  When the corner drop 1 is laid on the weir 20, as shown in FIG. 4A, the packings 11, 12 provided at the left and right ends of the main body 10 are positioned inside the groove of the receiving frame 22. The packings 11 and 12 provided on the bottom side surface 10 f are located immediately above the support frame 24. And the main-body part 10 receives a water pressure toward the downstream by the water flow of the water channel 2. FIG.

Here, as shown in FIG. 4A, when the main body 10 receives the water pressure F <b> 1 toward the downstream side, the fins 11 a and 11 a of the self-seal packing 11 provided at the right end of the main body 10 are received by the receiving frame 22. Abut. Further, water pressure is applied to the fins 11a and 11a through the gap between the main body 10 and the receiving frame 22, and the fins 11a and 11a are pressed to the left and deformed in a direction to stand up with respect to the base 11b. Adheres closely to the inner wall.
Similarly, the self-seal packing 11 provided at the left end portion of the main body 10 also comes into close contact with the receiving frame 22 while the fins 11a and 11a are in contact with the receiving frame 22 by water pressure.

  Further, as shown in FIG. 4B, the fins 11a and 11a of the self-seal packing 11 provided on the bottom side surface 10f are brought into contact with the support frame by the own weight F2 of the main body portion 10. Furthermore, water pressure is applied to the fins 11a and 11a, and the fins 11a and 11a are pressed to the downstream side and are brought into close contact with the upper surface of the support frame 24 while being deformed in a direction to stand up with respect to the base 11b.

  That is, when the corner drop 1 is laid on the weir part 20, the fins 11 a and 11 a of the self-seal packing 11 provided at the left and right ends of the main body part 10 are pressed against the receiving frame 22 by the water pressure applied to the main body part 10. The fins 11a and 11a themselves are brought into close contact with the receiving frame 22 due to deformation caused by water pressure, and a self-sealing function is exhibited. At the same time, the fins 11a and 11a of the self-seal packing 11 provided on the bottom side surface 10f of the main body 10 are pressed against the support frame 24 by the weight of the main body 10, and the fins 11a and 11a themselves are deformed to the support frame 24 by deformation due to water pressure. Adheres closely and develops a self-sealing function.

  Thereby, the watertightness between the main-body part 10 and the receiving frames 22 and 22 and the support frame 24 is ensured, and the weir part 20 can be stopped by the corner drop 1.

  Further, the corner drop 1 of the present embodiment is such that the tips of the fins 11a and 11a of the self-seal packing 11 abut against the receiving frame 22 in a state where water pressure is applied as shown in FIG. The contact area is small compared to the configuration using flat packing. Therefore, even if the corner drop 1 is lifted from the weir portion 20 in a state where water pressure is applied, the packings 11 and 12 are prevented from being rubbed and damaged by the receiving frame 22.

Moreover, since the corner drop 1 of the present embodiment is made of synthetic wood having a low specific gravity, the main body 10 can be used in combination with a wedge to prevent the corner drop 1 itself from floating.
That is, as shown in FIG. 5A, it is possible to prevent the corner drop 1 from rising by driving the wedge K between the upstream plane 10 b of the main body 10 and the receiving frame 22.

  Here, even if the wedge K is driven excessively, the packing 12 abuts against the receiving frame 22 as shown in FIG. 5A, so that the fins 11a and 11a are formed between the outer surface of the packing 12 and the root of the fin 11a. It does not receive excessive deformation just by entering the gap between them. Similarly, as shown in FIG. 5B, even if the wedge K is driven in a state where a load is applied to the corner drop 1, the packing 12 abuts against the support frame, so that the fins 11a and 11a may be excessively deformed. Absent. Thereby, it is possible to prevent the self seal packing 11 from being damaged.

Further, the corner drop 1 of the present embodiment maintains high water-stopping properties even when foreign matter such as a tree branch is sandwiched between the packings 11 and 12 and the receiving frame 22 or the support frame 24.
For example, as shown in FIG. 6A, when the foreign matter W is sandwiched between the downstream plane 10 a of the main body 10 and the receiving frame 22, the packing 12 comes into contact with the foreign matter W and a gap is formed between the receiving frame 22 and the packing 12. Produce. However, the left fin 11a of the self-sealing packing 11 is in close contact with the receiving frame 22 so as to wrap the foreign matter W, and the right fin 11a is in close contact with the receiving frame 22 over the entire length. Thereby, high water tightness is ensured and water stoppage does not fall.

  Further, as shown in FIG. 6B, even when the foreign matter W is sandwiched between the bottom side surface 10 f of the main body 10 and the support frame 24, the packing 12 similarly contacts the foreign matter W and the receiving frame 22. However, since the fins 11a, 11a of the self-seal packing 11 are in close contact with the receiving frame 22 so as to sandwich the foreign material W, high water tightness is ensured and water stoppage does not decrease.

  As described above, according to the corner drop 1 of the present embodiment, it is possible to ensure a high water stoppage despite an extremely simple structure, and there is little decrease in the water stoppage when foreign matter is caught. In addition, it is possible to effectively prevent damage to the packings 11 and 12 when attaching and detaching or using the wedge K together, and it is possible to save costs while improving water-stopping and durability.

In the present embodiment, as shown in FIG. 2A, the self-seal packing 11 in which the two fins 11a and 11a protrude from the base portion 11b is employed, but the present invention is limited to such a configuration. It is not a thing.
For example, as shown in FIG. 7A, a self-seal packing 14 in which the fin 14a protrudes from the base portion 14b by only one line can be employed. Although not shown in the figure, it is also possible to employ a self-seal packing having three or more fins.

Further, as shown in FIG. 7B, a cavity 15c is provided along the longitudinal direction inside a long rubber material having a substantially triangular cross section, and a fin 15a is formed at one acute angle portion, and the root of the fin 15a is formed. It is also possible to employ a self-seal packing 15 with the side as a base 15b.
According to the self-seal packing 15, the elasticity and strength of the fins 15a can be easily adjusted by appropriately setting the shape and arrangement site of the cavity 15c. This makes it possible to easily manufacture the self-seal packing 15 that exhibits water tightness and strength according to the water pressure.

Moreover, in the said embodiment, as shown in FIG.1, FIG.2 (b), (c), the damage of the self-seal packing 11 is carried out by arrange | positioning the packings 12 and 12 with high hardness on both sides of the self-seal packing 11. Although it is configured to prevent, it is possible to adopt a simplified configuration in which the packings 12 and 12 are omitted.
For example, as shown in FIG. 8, a groove-shaped notch 10g is provided on the downstream plane 10a of the main body 10 over the entire length in the vertical direction, and the self-seal packing 11 is fitted into the notch 10g and fixed. It is also possible. A similar structure can be adopted for the bottom side surface 10f of the main body 10 as well.

  Also in the structure of FIG. 8, high water sealing is ensured by the fins 11 a and 11 a of the self-seal packing 11. Even when the wedge is used in combination, the fins 11a and 11a are fitted into the notches 10g to prevent excessive deformation and prevent damage.

By the way, although the corner drop 1 of the said embodiment was laid in the dam part 20 shown in FIG. 3, the corner drop | corner which can be laid in the dam part from which a structure differs can also be formed.
Moreover, although the above-mentioned corner drop 1 was laid in the dam part 20 independently and water-stopped, it is also possible to form the corner drop which combined several square drop pieces.
Below, the modification of the corner drop 1 shown in the said embodiment is demonstrated.

FIG. 9A is a perspective view showing a corner drop 5 of a modified example, and FIG. 9B is a perspective view showing a dam portion 25 for laying the corner drop 5 of FIG. FIG. 10 is a perspective view showing a corner drop 7 of another modification, and FIG. 11 is a perspective view showing a corner drop 8 of still another modification.
In addition, the following modification changes a part of structure of the above-mentioned corner drop 1 and the weir part 20. FIG. Accordingly, the same components are denoted by the same reference numerals, and redundant description is omitted.

The corner drop 5 in FIG. 9A has a structure in which the arrangement of the packings 11 and 12 of the corner drop 1 (see FIG. 1) is partially changed. That is, the corner drop 1 described above has a structure in which the packings 11, 12, and 12 are attached to the bottom side surface 10 f of the main body 10.
On the other hand, the corner drop 5 in FIG. 9A has a structure in which the self-seal packing 11 and the packings 12 and 12 are attached over the entire length along the lower end of the downstream plane 10 a of the main body 10.

The corner drop 5 is laid on a dam portion 25 constructed in the water channel 2 as shown in FIG.
The dam portion 25 has a structure in which the planar support frame 24 provided on the bottom portion 23 of the water channel 2 is changed to a receiving frame 26 in the dam portion 20 (see FIG. 3). In other words, the dam portion 25 has a structure in which the receiving frames 22 and 22 are installed on the opposite side walls 21 and 21 of the water channel 2 and a similar receiving frame 26 is installed on the bottom portion 23.

  Therefore, by laying the corner drop 5 on the weir 25, the water stop structure shown in FIG. 4A is formed at the left and right ends and the lower end of the main body 10 and exhibits high water stop. It becomes possible. Further, even when the corner drop 5 is laid on the weir 25 using a wedge, the water-stopping structure shown in FIG. 5A is formed, so that the self-sealing packing 11 is prevented from being damaged, and foreign matter is further removed. Even when the water is caught, the water-stopping structure shown in FIG.

  The corner drop 7 in FIG. 10 is laid on the weir 20 (see FIG. 3) and has a structure in which the above-described corner drop 1 (see FIG. 1) is divided into three vertically. That is, the corner drop 7 is formed by combining three pieces: a corner drop piece 70 arranged in the upper stage, a corner drop piece 71 arranged in the middle stage, and a corner drop piece 72 arranged in the lower stage.

The corner drop piece 70 is provided with a groove 70a extending over the entire length in the longitudinal direction on the bottom side surface 10f of the main body portion 10, and packings 12, 11, and 12 are attached along the left and right ends of the downstream plane 10a of the main body portion 10, respectively. ing.
The corner drop piece 71 is provided with a groove 71a extending over the entire length in the longitudinal direction on the bottom side surface 10f of the main body 10, and with a protrusion 71b extending over the entire length in the longitudinal direction on the upper side surface 10e. Packing 12,11,12 is each attached along the right-and-left both ends.
The corner drop piece 72 includes a ridge 72a extending over the entire length in the longitudinal direction on the upper side surface 10e of the main body portion 10, and packings 12, 11, 12 along the left and right end portions and the bottom side surface 10f of the downstream side plane 10a of the main body portion 10. Are attached to each.

  When the corner drop 7 having such a configuration is stacked and laid on the weir 20 (see FIG. 3) in the order of the corner drop pieces 72, 71, 70, the concave stripe 70 a of the corner drop piece 70 and the convex stripe of the corner drop piece 71 are arranged. 71b is fitted, and the concave strip 71a of the corner drop piece 71 and the convex stripe 72a of the corner drop piece 72 are fitted to ensure water tightness between the corner drop pieces 70 to 72, and the corner drop shown in FIG. 1 shows a water stop structure similar to 1.

Therefore, according to the corner drop 7, it is possible to express a high water-stopping property similarly to the above-described corner drop 1 (see FIG. 1), and even if the dam portion 20 is large, individual corner drop pieces 70-72 can be reduced in weight and it becomes possible to improve laying property.
In FIG. 10, the corner drop 7 is composed of the corner drop pieces 70 to 72, but the corner drop piece 71 having four or more steps can be formed by further adding the middle corner drop piece 71. It is possible to cope with the increased weir part 20.

  The corner drop 7 in FIG. 11 is laid on the weir 25 (see FIG. 9b) and has a structure in which the above-described corner drop 5 (see FIG. 9a) is divided into three vertically. In other words, the corner drop 7 is formed by combining three pieces: a corner drop piece 70 arranged at the upper stage, a corner drop piece 71 arranged at the middle stage, and a corner drop piece 73 arranged at the lower stage.

The corner drop pieces 70 and 71 are the same as those shown in FIG.
The corner drop piece 73 includes a ridge 73a extending over the entire length in the longitudinal direction on the upper side surface 10e of the main body portion 10, and packings 12, 11, and 12 are provided along the left and right end portions and the lower end portion of the downstream plane 10a of the main body portion 10. Each is attached.

  When the corner drop 8 having such a configuration is stacked and laid on the weir 25 (see FIG. 9b) in the order of the corner drop pieces 73, 71, 70, the corner drop pieces 70, 71, 73 are fitted to each other and watertight. Is secured, and a water stop structure similar to that of the corner drop 5 shown in FIG.

Therefore, the same high water-stopping property as the above-described corner drop 5 (see FIG. 9a) can be exhibited, and even with the large dam portion 25, the individual corner drop pieces 70, 71, 73 are lightweight. To improve layability.
Also in this corner drop 8, the corner drop piece 71 of the middle stage can be added to form the corner drop 8 of four or more steps, and it is possible to deal with the dam portion 25 having an increased depth.

  In addition, in the corner drop 5, 7, and 8 shown in the modified example, it is possible to adopt self-seal packings 14 and 15 (see FIGS. 7a and 7b) instead of the self-seal packing 11. Further, also in these corner droppings 5, 7, and 8, it is possible to adopt the fixing structure of the self-seal packing 11 shown in FIG.

It is a perspective view which shows the corner dropping which concerns on embodiment of this invention. (A) is a perspective view which shows the self-seal packing employ | adopted for the angle drop of FIG. 1, (b) is an A direction arrow directional view of FIG. 1, (c) is a B direction arrow directional view of FIG. It is a perspective view which shows the dam part which lays the corner drop of FIG. 3A is a cross-sectional view taken along the line CC of FIG. 3 in a state where the corner drop of FIG. 1 is laid on the weir part of FIG. 3, and FIG. 3B is a cross-sectional view taken along the line DD of FIG. . 3A is a cross-sectional view taken along the line CC of FIG. 3 in a state where the corner drop of FIG. 1 is laid using a wedge in the weir part of FIG. 3, and FIG. 3B is a cross-sectional view taken along the line DD of FIG. It is sectional drawing. (A) is explanatory drawing which shows the state in which the foreign material was pinched in Fig.4 (a), (b) is explanatory drawing which shows the state in which the foreign material was pinched in FIG.4 (b). (A), (b) is explanatory drawing which shows the modification of a self seal packing. It is explanatory drawing which shows the modification of the attachment structure of a self seal packing. The perspective view which shows the corner drop of a modification, (b) is a perspective view which shows the weir part which lays the corner drop of (a). It is a perspective view which shows the corner drop of another modification. It is a perspective view which shows the corner drop of another modification.

Explanation of symbols

1, 5, 7, 8 Corner drop 2 Water channel 10a Surface located downstream (downstream plane)
10f Bottom side surface 11a Fins 11, 14, 15 Self-seal packing 12 Packing 15c Cavity 20, 25 Dam portion 21 Side wall 22, 26 Receiving frame 23 Bottom 24 Support frames 70, 71, 72, 73 Corner drop pieces

Claims (8)

  A corner drop laid on a weir portion having a groove-shaped receiving frame erected on both side walls of a water channel and a planar support frame erected at the bottom of the water channel, and is a surface located on the downstream side, A self-sealing packing is provided over the entire length along the part that fits into the receiving frame and the bottom side surface that comes into contact with the supporting frame, and stops the water by bringing the fin into close contact with the receiving frame or the supporting frame by the water pressure generated by the water level difference. A corner drop characterized by that.   It is a corner drop laid on a weir provided with a groove-shaped receiving frame erected on both side walls and the bottom of the water channel, and is a surface located on the downstream side, along the part that fits into the receiving frame, A corner drop, characterized in that a self-seal packing is provided over the entire length to stop the water by pressing the fin against the frame by the water pressure generated by the difference.   3. A flat packing is provided along the self-sealing packing so that the outer surface is located at a portion protruding by a predetermined length from the base of the fin of the self-sealing packing. The corner drop as described in.   A plurality of divided corner drop pieces are stacked, and each of the corner drop pieces is at least self-sealed over the entire length in a portion corresponding to a fitting portion to the receiving frame and a contact portion to the support frame. The corner drop according to any one of claims 1 to 3, wherein a packing is provided.   The corner drop according to any one of claims 1 to 4, wherein the self-seal packing includes a single or a plurality of fins along a longitudinal direction.   The corner drop according to any one of claims 1 to 5, wherein the self-seal packing includes a cavity extending in a longitudinal direction inside the fin.   The angle drop according to any one of claims 1 to 6, wherein the self-sealing packing is chloroprene rubber or silicon rubber having a hardness of 40 degrees to 60 degrees.   The corner drop according to any one of claims 1 to 7, wherein the corner drop is made of synthetic wood made of a long fiber reinforced hard synthetic resin foam.

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