JP5689762B2 - sprinkler - Google Patents

Description

  The present invention relates to a sprinkler for sprinkling water on railway tracks, roads, farmland, grounds, and the like.

  Conventionally, in this type of sprinkler, a water spray nozzle is used to rotate a blade using water spray pressure and a torsion spring connected thereto is twisted. When returning, it is common to perform water spraying by rotating the nozzle by a predetermined angle by hitting a water injection nozzle. The sprinkler area of this type of sprinkler is approximately circular with the sprinkler at the center. For this reason, for example, in the case where the watering area is rectangular, such as watering on railway tracks or roads that spray water for wet snow, the area that does not require watering is also sprinkled. Since the amount of water sprinkled unnecessarily increases, it is required to reduce wasteful sprinkling as much as possible. Also. There is also a strong demand to be able to uniformly spray the entire range regardless of whether the spraying distance from the water spray nozzle of the sprinkler in the determined watering range is long or close.

  The following sprinkler is shown by patent documents 1-3 as what responds to such a request | requirement.

  That is, the sprinkler disclosed in Patent Document 1 varies the amount of water supplied to the rotating nozzle depending on the rotation angle of the nozzle, and reduces the amount of water supplied to the nozzle when water is sprayed to an area close to the nozzle. Thus, the water is allowed to fly only to the near side, and when water is sprayed to a region far from the nozzle, the amount of water supplied to the nozzle is increased to fly the water far.

  In addition, the sprinkler disclosed in Patent Document 2 has nozzles arranged in two upper and lower stages, water is constantly supplied to the upper nozzle, and the injection pressure is used for rotational driving of the nozzle. Is to supply water intermittently and limit the watering area to the required pattern.

  However, the sprinkler described in Patent Document 1 has the following drawbacks. That is, when the amount of water supplied to the nozzle is large and the sprinkling distance is long, the injection pressure increases, so the rotational force received by the blade unit that hits and rotates the nozzle increases, and the nozzle rotates by a large angle. Since a large striking force is received from the blade unit, the rotation angle of the nozzle increases. On the other hand, when the amount of water supplied to the nozzle is small and the sprinkling distance is short, the water injection pressure is low, so the rotational force received by the blade unit is small, and the rotation angle is small. Since the impact force received is small, the rotation angle of the nozzle is small. For this reason, the amount of water sprayed per unit area is small in the range in which the nozzle rotates fast at a large rotation angle, and increases in the range in which the nozzle rotates slowly at a small rotation angle.

  Moreover, although the sprinkler described in Patent Document 2 can eliminate the above-described drawbacks, it has the following disadvantages. That is, since water is constantly supplied to the upper nozzle in order to rotate the nozzle by a certain angle, the upper nozzle sprinkles water even in a range that does not require watering around the sprinkler, and the amount of invalid watering is constant. It cannot be reduced below the limit.

  In order to solve such a drawback, a sprinkler as shown in Patent Document 3 has been proposed.

  The sprinkler shown in Patent Document 3 is a nozzle unit having a plurality of water jet nozzles protruding radially on a hollow fixed shaft that is supplied with water from the lower end and provided with a water outlet opening in the direction of water spraying on the peripheral wall near the upper end. The nozzle unit is rotatably attached and any one of the plurality of water injection nozzles communicates with the water outlet so as to inject water at any position in the circumferential direction. . As a result, the nozzle unit is stably rotated by a certain angle, and the watering range is limited by the direction in which the water outlet of the hollow fixed shaft opens, so that the watering around the sprinkler is almost uniform. In addition to being able to sprinkle water, the amount of ineffective watering can be reduced.

Japanese Utility Model Publication No. 04-134445 JP 09-248493 A JP 2010-058016 A

  However, since the sprinkler disclosed in Patent Document 3 is also provided with a plurality of water injection nozzles, the structure is complicated and the number of parts is large, and water is evenly distributed in a rectangular watering range. There are problems such as being difficult.

  Accordingly, an object of the present invention is to provide a sprinkler that solves such problems, has a simple structure, has a small number of parts, and can evenly spray water in a rectangular watering range without waste. Is.

  In order to solve such a problem, the present invention provides a water supply pipe in a sprinkler having a rotation drive mechanism for rotating a nozzle body for water jet by a predetermined angle in the circumferential direction by water jet pressure. A cylindrical pattern coupler to be coupled is provided, an outer cylinder is inserted and fixed in this coupler through a water supply space, an inner cylinder is rotatably inserted into the outer cylinder, and an injection nozzle is provided at the tip of the inner cylinder. The outer pipe and the inner cylinder are provided with a water passage port so as to be able to communicate with the water supply space, and the first water passage port provided on one of the outer cylinder and the inner cylinder has a predetermined equality. The second water passage port provided on the other side is formed above and below the vertically long hole of the first water passage port. It is almost the same as the length of the direction or shorter than this A composite shape in which a vertically elongated hole extending in a line direction and a horizontally elongated hole extending in the horizontal circumferential direction at a length substantially equal to the interval of the first water flow port from both sides of the vertically elongated hole are overlapped. It is characterized by comprising a plurality of holes.

  In this invention, it is preferable that the width of the longitudinal hole of the second water passage port is wider than the width of the longitudinal hole of the first water passage port.

  Moreover, the height of the left-right axial direction of the horizontal elongated hole of the said 2nd water flow port is not the same, and either one can be made larger than the other.

  Furthermore, it is preferable to provide a reversing mechanism for reversing the rotation at a set rotation angle and a rotation limiting mechanism for limiting the amount of rotation of the rotation driving mechanism.

  As in the present invention, the shape of the outer cylinder inserted into the pattern coupler and the water passage port provided in the inner cylinder is such that one is a vertically elongated hole extending in the vertical direction and the other is a vertically elongated hole and a horizontally elongated hole. With a simple structure, the amount of water sprayed from the sprinkler can be adjusted to the amount of water spraying that matches the shape of the watering range according to the rotation angle of the spray pipe. Since it becomes possible, water can be uniformly sprayed in a rectangular watering range without waste.

The structure of the sprinkler of the Example of this invention is shown, (a) is a top view, (b) is a front view which shows a half part as a longitudinal cross-sectional view. It is a longitudinal cross-section which shows the structure of the pattern coupler which is the principal part of the sprinkler of the Example of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the outer cylinder which comprises the pattern coupler of the sprinkler of the Example of this invention, (a) is a top view, (b) is a longitudinal cross-sectional view, (c) is cc line of (b). FIG. It is a block diagram of the inner cylinder which comprises the pattern coupler part of the sprinkler of the Example of this invention, (a) is a longitudinal cross-sectional view, (b) is a cross-sectional view which follows the bb line of (a). It is an expanded view which shows the water flow port provided in the outer cylinder and inner cylinder of the sprinkler of 1st Example of this invention. It is explanatory drawing of the watering operation | movement of the sprinkler of 1st Example of this invention. It is an expanded view which shows the water flow port provided in the outer cylinder and inner cylinder of the sprinkler of 2nd Example of this invention. It is explanatory drawing of the watering operation | movement of the sprinkler of 2nd Example of this invention. It is explanatory drawing of the watering range by the sprinkler of this invention, (A) is explanatory drawing of watering shape by 1st Example of this invention, (B) is watering shape of 2nd Example of this invention, It is explanatory drawing. It is explanatory drawing of rotation operation | movement of the range of the 1st rotation angle of the sprinkler of this invention. It is explanatory drawing of rotation operation | movement of the range of the 2nd rotation angle of the sprinkler of this invention. It is explanatory drawing of rotation operation | movement of the range of the 2nd rotation angle of the improved sprinkler of this invention. It is an expanded view which shows the water flow port provided in the outer cylinder and inner cylinder of the sprinkler of 3rd Example of this invention.

  Embodiments of the present invention will be described with reference to the embodiments shown in the drawings.

  First, a first embodiment of the present invention will be described with reference to FIGS.

  1 to 5, reference numeral 1 denotes a sprinkler. The sprinkler 1 is a pattern coupler 2 that is erected by screwing a base end portion into a water supply pipe (not shown) to form a water spray pattern, and the coupler. 2 and a rotation drive mechanism 5 that rotates with the injection pressure of water in the injection tube 3 and rotates the injection tube 3 by a predetermined angle. In addition, the sprinkler 1 includes a reversing mechanism 7 for reversing the rotation of the injection tube 3 within a predetermined angle, for example, 180 °, and a rotation limiting mechanism for limiting the rotation angle of the blade 51 of the rotation driving mechanism 5. 8 is connected.

  As shown in detail in FIG. 2, the pattern coupler 2 includes a cylindrical coupler main body 21, a cylindrical outer cylinder 22 inserted into the main body 21 and fixed by screw connection, and the outer cylinder 22. A cylindrical inner cylinder 23 inserted rotatably and a water faucet 24 screwed to the proximal end of the inner cylinder 23 are configured.

  The water faucet 24 is provided with a water passage hole 24a of an appropriate size at the center, and thereby determines the amount of water to be jetted as a base. Further, the peripheral walls of the outer cylinder 22 and the inner cylinder 23 are provided with water flow ports 22a and 23a formed with holes of a desired pattern for forming a water spray pattern at positions facing each other. It communicates with the water flow space.

  The injection pipe 3 is integrally connected to the inner cylinder 23 by screwing and fixing the base end portion 32 of the injection pipe 3 to the distal end of the inner cylinder 23 rotatably provided on the pattern coupler 2. For this reason, the injection pipe 3 is rotatably supported by the pattern coupler 2 together with the inner cylinder 23. A coil spring 34 is interposed between the base end portion 32 of the injection tube 3 coupled to the inner cylinder 23 and the distal end of the outer cylinder 22, and an appropriate pressing force is applied to the outer cylinder 22. An appropriate rotational braking force is applied to the injection pipe 3.

  Further, a packing 25 made of an O-ring is provided between the coupler main body 21 and the outer cylinder 22, and an elastic packing 26 is interposed between the outer cylinder 22 and the inner cylinder 23, so that in the coupler 21, Water leakage from the gap between the cylinders is prevented.

  The injection pipe 3 is connected to a water injection nozzle 33 that squeezes and injects water at a tip portion that is inclined at a predetermined elevation angle at the upper end of the pipe body 31.

  The rotational drive mechanism 5 that rotationally drives the injection pipe 3 includes a blade 51 that is rotatably supported on the top portion 36 of the injection pipe 3, and water that is coupled to the tip of the blade 51 and is injected from the nozzle 33 of the injection pipe 3. And a pressure receiving body 52 that generates a driving force in response to the injection pressure. On the boss portion 53 fitted to the injection pipe main body 31 of the blade 51, a restoring spring 54 made of a coiled spring is disposed, one end of which is coupled to the fixed shaft 37 extended from the injection pipe 3, The other end is coupled to the boss portion 53 of the blade 51. A plastic cap 56 is put on the upper part of the restoring spring 54 so as not to be splashed with water.

  The reversing mechanism 7 includes a reversing lever 71 and angle setting levers 75 and 76 for setting a reversing angle. However, since the reversing mechanism 7 is publicly known from Patent Document 1 and the like, detailed description thereof is omitted. .

  The rotation limiting mechanism 8 includes a stopper 81 configured with an adjustment screw. When the angle at which the blade 51 of the rotational drive mechanism 5 is rotated by the spray pressure of water sprayed from the nozzle 33 is greater than or equal to the angle set by the stopper 81, the protrusion 58 provided on the blade 51 The rotation is limited so that the stopper 81 is not rotated beyond this set angle.

  Since the stopper 81 is composed of an adjusting screw, the rotation angle of the blade 51, that is, the rotation angle of the blade 51 is adjusted by adjusting the protruding length of the tip by screwing or returning the stopper 81. A rotation limit angle can be set.

  The sprinkler 1 according to the first embodiment of the present invention configured as described above has a watering range set to a 2D rectangle in which the length is D and the width is twice the length. FIG. 5 shows a specific first embodiment of the patterns of the water passage ports 22a and 23a provided in the outer cylinder 22 and the inner cylinder 23 of the pattern coupler 2 of the sprinkler 1. FIG. 5 shows the developed portions of the cylindrical peripheral walls of the outer cylinder 22 and the inner cylinder 23 provided with the water passage ports 22a and 23a.

  Here, the pattern of the water flow port 22a provided in the outer cylinder 22 is formed in a substantially T shape by overlapping the longitudinally elongated holes facing the axial direction of the outer cylinder and the laterally elongated holes facing the circumference. The pattern is not limited to this pattern. For example, a pattern in which a cross shape is deformed as shown in FIG. 13 may be used. In order to finely adjust the amount of water flow, it is preferable to incline the side of the vertically long hole portion or the horizontally long hole portion of the water flow port 22a with respect to the axial direction or the diameter direction of the cylinder. Further, four water passage ports 22a are provided, and are alternately arranged at 90 ° intervals with the directions thereof being reversed up and down. The length L22 of the horizontally long hole portion facing the circumferential direction is the same as the arrangement interval P, and the length (height) H22 of the vertical vertically long hole portion is a water flow port provided in the inner cylinder 23. The length (height) H23 of 23a is selected to be equal to or slightly smaller than this. The width W22 is selected to be not less than 1.5 times the width W23 of the water passage port 23a of the inner cylinder 23.

  Two water passage ports 23a provided in the inner cylinder 23 are provided at intervals of 180 °. Four of these can be provided in order to increase the amount of jet water. The pattern is a simple long hole facing the axial direction of the inner cylinder, but is not limited to this, and a plurality of round holes are arranged in parallel in the axial direction (vertical direction) in a plurality of rows. Also good. The opening area (≈height H23 × width W23) of the water passage port 23a is determined based on the desired maximum water spray amount.

  The basic watering operation of the sprinkler 1 configured as described above is as follows.

  That is, when water is supplied to the pattern coupler 2 in FIG. 1 from a water supply pipe (not shown), water in the water supply space of the coupler main body 21 passes through the water passage ports 22a and 23a of the outer cylinder 22 and the inner cylinder 23, and the inner cylinder. 23. The water supplied to the inner cylinder 23 is squeezed by the nozzle 33 at the tip through the pipe body 31 of the injection pipe 3 that is connected to the inner cylinder 23, and is injected and discharged to the surroundings after the pressure is increased. The water sprayed from the nozzle 33 hits the pressure receiving body 52 attached to the tip of the blade 51 of the rotation drive mechanism 5. The pressure receiving body 52 generates a counterclockwise rotational driving force by the reaction force of the jetting pressure of the jetted water. With this rotational driving force, the blade 51 rotates by a rotational angle corresponding to the driving force at this time, and the restoring spring 54 is twisted against the spring force to generate a restoring force.

  When the blade 51 rotates, the pressure receiving body 52 does not receive pressure from the jet water, and this time, the blade 51 is driven to rotate clockwise by the restoring force of the restoring spring 54, and the tip 51a of the blade is connected to the jet pipe. 3 projections 35 are hit. By this impact, the injection tube 3 rotates clockwise by an angle corresponding to the impact force. Then, the pressure receiving body 52 returns to the original position, receives the water injection pressure again, rotates the blade 51 in the same manner as described above, and repeats the operation of hitting the projection 35 of the injection pipe 3 so that the injection pipe 3 is predetermined. Water is sprayed and sprinkled while rotating at an angle.

  When the rotation angle of the ejection tube 3 reaches an angle set in advance by the angle setting levers 75 and 76, for example, 180 °, the reversing lever 71 of the reversing mechanism 7 integrally coupled to the ejection tube 3 is set to one angle. Since the reversing mechanism 7 operates upon hitting the lever 75, the injection tube 3 is now driven to rotate counterclockwise, and returns to its original position. When the injection tube 3 returns to the original position, the reversing lever 71 of the reversing mechanism 7 hits the other angle setting lever 76, stops the reversing operation, and again shifts to the normal rotation operation, and thereafter repeats this operation.

  Thereby, water can be sprayed to the watering range determined from the nozzle 33, and watering can be performed equally.

  Next, the watering operation of the sprinkler of the first embodiment having such a configuration will be described with reference to FIGS.

  (A) of FIG. 9 is a figure explaining the watering range by the sprinkler of Example 1 of this invention. In this figure, a rectangular frame W1 having a vertical D and a horizontal 2D indicates the watering range. The sprinkler 1 is installed at a central point P on the lower side of the frame W1, and the spray pipe 3 of the sprinkler is rotated in a range of 0 ° to 180 ° to spray water in the rectangular frame W1.

  For this reason, as described above, the outer cylinder 22 and the inner cylinder 23 of the pattern coupler 2 are provided with water flow ports 22a and 23a having a pattern as shown in FIG.

  FIG. 6 shows the positional relationship between the water flow ports 22a and 23a for each rotation angle of the outer cylinder 22 and the inner cylinder 23 when the sprinkler 1 including the pattern coupler 2 rotates the injection pipe 3 to sprinkle water. Show. The angle in FIG. 6 indicates the water spray angle of the injection tube 3 and coincides with the water radiation angle indicated by the one-dot chain line in FIG. FIG. 6 is a cross-sectional view in which the water passage port portions of the inner and outer cylinders 22 and 23 are horizontally cut in the upper stage, and similarly, the water port port portion of the inner and outer cylinders is developed in the circumferential direction from the inner side of the cylinder in the lower stage. The figure is shown.

  Water spraying starts at an angle of 0 °, that is, the lower side of the left side of the rectangular frame W1 indicating the water spraying range in FIG. At this position, as shown at 0 ° in FIG. 6, the water passage ports 23a-1 and 23a-2 of the inner cylinder 23 are connected to the upper and lower water passage ports 22a-1, 22a-3 and the left and right passage ports of the outer cylinder 22, respectively. In order to oppose the boundary portion of the water ports 22a-2 and 22a-4, as shown in the development view, the upper and lower ends of the water flow port 23a-1 of the inner cylinder 23 constituted by vertically long holes are respectively shown in FIG. It exists in the state which overlaps the edge part of the laterally long hole part of the water flow ports 22a-1 and 22a-2 of the outer cylinder 22. FIG. The effective water passage area of the water passage port at this time is a small area S0 as shown in black. The effective water flow area S0 at this time is a water flow area corresponding to the amount of water that can be blown by the distance from the point P where the sprinkler 1 is placed to the left side of the frame W of the water spray range on the water discharge line of 0 °. Become.

  Next, when the injection pipe 3 is rotated by 15 ° in the clockwise direction, the water spray direction is directed to the 15 ° water discharge line in FIG. At this time, since the inner cylinder 23 also rotates together, the water passage port 23a-1 (23a-2) of the inner cylinder 23 is replaced with the water passage port 22a of the outer cylinder 22, as shown at a position of 15 ° in FIG. -2 (22a-4), and overlaps only at the end of the horizontal hole of the water flow port 22a-1 (22a-3). As shown in FIG. 9A, the effective water flow area at this time increases to an area S15 corresponding to the amount of water that reaches from the point P to the point where the 15 ° line touches the left side of the frame W. .

  When the injection pipe 3 is further rotated by 15 ° and reaches the position of 30 °, the watering direction is directed to the 30 ° water discharge line in FIG. As the injection pipe 3 rotates, the inner cylinder 23 rotates, and a part of the water passage port 23a-1 (23a-2) of the inner cylinder passes through the outer cylinder 22 as shown in the 30 ° position diagram of FIG. Since it comes to the position which overlaps with the vertically long hole part of water port 22a-1 (22a-3), an effective water flow area increases further to S30, and spray water is sprayed to the left side of the frame W on the 30-degree water discharge line. become.

  Further, when the injection pipe 3 is rotated to the 45 ° position, the water passage port 23a-1 (23a-2) of the inner cylinder 23 passes through the outer cylinder 22 as shown in the 45 ° position diagram of FIG. Since the water port 22a-1 (22a-3) is completely overlapped with the water port 22a-1 (22a-3), the effective water flow area is further increased to S45, and the amount of spray water is maximized. The amount of jet water at this time is such that the maximum distance to the diagonal point of the frame W can be skipped as shown by the 45 ° water discharge line in FIG. The size (area) of the pattern of the water passage ports of the inner and outer cylinders is selected so as to be.

  Thereafter, as the rotation proceeds, the water discharge distance from the sprinkler 1 gradually decreases from this position to a position of 90 ° as shown in FIG. 9A. The water discharge distance at the 90 ° rotation position is equal to the water discharge distance at the 0 ° rotation position. In accordance with this, the relative rotational position of the water passage port of the inner and outer cylinders follows a course opposite to the above as shown in the drawing from 60 ° to 90 ° in FIG. The effective water flow area in between decreases gradually, and the flying distance of the jet water can be reduced.

  The operation in the rotation range from 90 ° to 180 ° is a repetition of the rotation operation from 0 ° to 90 °.

  Therefore, according to the sprinkler of the first embodiment, the spray pipe 3 is rotated by a predetermined angle by the rotation drive mechanism 5 and sprinkled to form a rectangular water spray frame for each rotation angle of the spray pipe 3 in a rectangular water spray range. Since the effective water flow area can be changed by adjusting the overlap of the water flow ports of the inner and outer cylinders corresponding to the change in the water discharge distance in W1, without protruding this within the rectangular watering range, Water can be sprayed almost uniformly, and wasteful water spray can be suppressed to increase water spray efficiency.

  By the way, in the sprinkler of Example 1, when the rotation angle of the injection tube 3 is in the range of 0 ° to 30 ° and when it is in the range of 30 ° to 60 °, it is 0 ° to 30 °. Since the amount of jet water is smaller and the amount of jet water is larger when the angle is 30 ° to 60 °, there is a difference in the rotational speed and advance angle of the jet pipe 3.

  FIG. 10 shows the movement of the injection tube 3 and the rotation drive mechanism when the rotation angle of the injection tube 3 is in the range of 0 ° to 30 °, and the injection water pressure is also increased when the rotation angle of the injection tube 3 is in the range of 30 ° to 60 °. FIG. 11 shows the movement of the injection tube 3 and the rotary drive mechanism in the state of

  In FIG. 10, (a) shows the state which exists in the rotation start position of the injection pipe 3. FIG. When water injection is started, the water injected from the nozzle 33 hits the pressure receiving body 52 of the rotation drive mechanism 5, and the blade 51 receives a counterclockwise driving force according to the water injection pressure. The mechanism 5 rotates against a spring force of a restoring spring (not shown) as shown in (b), and rotates to a position of a rotation angle x that balances with the spring force of the restoring spring, as shown in (c). .

  The restoring force of the restoring spring generated when the restoring spring is twisted by the rotation of the blade 51 acts on the blade 51, and this time, the blade 51 is rotated in the clockwise direction as indicated by the bold arrow in (d). . By this rotation, the blade 51 is returned as shown in (e), hits and hits the projection 35 of the injection tube 3, and the injection tube 3 together with the blade 51 matches the striking force as shown in (f). Rotate clockwise to the desired position and rotate by an angle α. The injection pipe 3 repeats such a rotation operation and rotates by a predetermined angle.

  Next, in the range of 30 ° to 60 ° where the amount of jet water increases, a rotating operation is performed as shown in FIG.

  (A) of FIG. 11 is a rotation start position, and the injection tube 3 and the rotation drive mechanism 5 are overlapped. When the jet water from the nozzle 33 hits the pressure receiving body 52 of the rotation drive mechanism 5, the blade 51 is driven to rotate counterclockwise by the jet water pressure. At this time, since the amount of jet water is larger than in the case described with reference to FIG. 10, the jet pressure of water is also increased, and the blade 51 is rotated with a large driving force commensurate with that, so that (b), (c After the state of (), as shown in (d), it rotates greatly from the rotation start position to the position of the rotation angle y of about 90 °, and balances with the spring force of the restoring spring. As a result, the restoring spring is twisted to a greater extent, thereby generating a large restoring force.

  This time, the blade 51 is rotated clockwise from the position shown in (d) by the large restoring force of the restoring spring, so that the blade 51 passes through the states (e) and (f), and (g) As shown in FIG. 4, the blade 51 rotates at a stroke until it hits the projection 35 of the injection tube 3 and strikes the injection tube 3 with a large striking force, so that the injection tube 3 is positioned at an angle β as shown in FIG. Until the next rotation is started.

  As is clear from the above description, the rotation angle β of the injection tube 3 in the range with a large amount of injection water is larger than the rotation angle α of the injection tube 3 in the range with a small amount of injection water. It can be more than doubled.

  Thus, in the rotation range of 30 ° to 60 ° where the amount of spray water increases, the rotation of the spray tube 3 is advanced at a large rotation angle, so the water spray range becomes wide, but the water spray amount per area is small. Since it is less than the watering in the 0 ° to 30 ° rotation range, the watering amount is uneven.

  In the present invention, the rotation limiting mechanism 8 is provided in the first embodiment in order to eliminate such inconvenience and to uniformly spray water in the rectangular watering range.

  The rotation operation in the range of the rotation angle of 30 ° to 60 ° with a large fountain amount of the sprinkler 1 provided with the rotation limiting mechanism 8 is shown in FIG.

  The rotation operation is started from the position shown in FIG. At this position, when water sprayed from the nozzle 33 of the spray pipe 3 hits the pressure receiving body 52 of the rotation drive mechanism 5, the blade 51 is rotationally driven counterclockwise by the spray water pressure. As a result, the blade 51 rotates as shown by the thick arrows in (b) and (c), and rotates to the position of the rotation limit angle z set by the screwing amount of the stopper 81 shown in (d). The projection 58 hits the stopper 81 of the rotation limiting mechanism 8 and the rotation is stopped. At the same time, when the projection 58 of the blade 51 hits the stopper 81, it is struck, so that the injection pipe 3 integrated with the rotation limiting mechanism 8 is counterclockwise as shown in FIG. Then, the stopper 81 is separated from the projection 58 of the blade 51.

  From this point, the blade 51 is rotated in the clockwise direction by the restoring force of the restoring spring, so that the blade 51 rotates through the state (f) to the position where it hits the projection 35 of the injection tube 3 as shown in (g). Stroke the injection tube 3. Thereby, the injection tube 3 rotates with the blade 51 to the position shown in (h), and the next rotation operation is started. At this time, the rotation advance angle of the injection tube 3 is θ. This advance angle θ can be set to a value that is not significantly different from the advance angle α when the amount of spray water is small by adjusting the screwing amount of the stopper 81 formed of an adjusting screw and adjusting the tip position thereof. It becomes. This is because the set rotation limit angle z by the stopper 81 by the stopper 81 shown in (d) is set to be substantially equal to the rotation angle x of the blade 51 in the range where the amount of jet water is small, as shown in FIG. realizable.

  The adjustment of the position of the stopper 81 can also be performed by adjusting according to the environment of the installation site of the sprinkler, i.e., the water supply pressure at the site, or fine adjustment to eliminate individual differences caused by manufacturing errors of the sprinkler. . Since the stopper 81 only needs to be able to adjust the distance between the tip of the stopper 81 and the projection of the blade 51, a mechanism capable of adjusting the distance other than the adjusting screw can be used.

  In this way, by attaching the rotation limiting mechanism 8 to the injection pipe 3, in the rotation range where the amount of spray water is large and the injection pressure is high, a large rotation of the blade 51 of the rotation drive mechanism 5 is applied to the stopper 81 in the middle. In addition to stopping, a part of the advance angle of the injection tube 3 can be returned, so the rotation advance angle of the injection tube 3 in the clockwise direction can be suppressed. For this reason, even if the watering range is a rectangle such as a rectangle, the advance angle of rotation of the injection pipe can be made relatively uniform over the entire rotation range, so that the entire watering amount is made uniform. Can do.

  The sprinkler of Example 1 described above is such that the watering distance in the horizontal direction (direction of rotation angle 0 °) is equal to the watering distance in the vertical direction (direction of rotation angle 90 °). Is improved so that the watering distance in the vertical and horizontal directions can be varied.

  FIG. 7 shows a pattern of water passage ports provided in the inner and outer cylinders according to the second embodiment of the present invention.

  The water passage port 23b of the inner cylinder 23 in the second embodiment has the same pattern as the water passage port 23a of the inner cylinder 23 of the first embodiment, and is formed by a long hole that is long in the vertical direction (the axial direction of the inner cylinder 23). Two are provided at intervals of 180 °.

  The four water passage ports 22b of the outer cylinder 22 are provided at intervals of 90 ° like the water passage ports 22a (see FIG. 5) of the outer cylinder 22 of the first embodiment, but the pattern is different as follows. Yes. That is, the water flow port 22b has a shape in which a horizontally long slot and a vertically long hole are overlapped in a T shape like the water flow port 22a of the first embodiment, but the right end side of the horizontally long slot portion is longer than the left end side. It differs from the water flow port 22a of the first embodiment in that the height in the axial direction is high and the pattern is asymmetric. Incidentally, the water flow port 22a of Example 1 is a symmetrical pattern.

  Thus, when the water flow port 22b provided in the outer cylinder 22 is formed in a left-right asymmetric pattern, as shown in FIG. 8, at the injection position of 0 ° (180 °) of the injection pipe 3, The water passage port 23b of the cylinder 23 overlaps the water passage port 22b of the outer cylinder 22 and the left end portion of the laterally long hole portion having the lower axial height. At the 90 ° (270 °) injection position of the injection pipe 3, the water passage port 23 b of the inner cylinder 23 is the right end of the laterally long hole portion of the water passage port 22 b of the outer cylinder 22 with the higher axial height. Since the effective water flow area (the area of the blacked out portion in FIG. 8) is 90 °, the rotation position at 90 ° is larger than the rotation position at 0 °. Therefore, in the sprinkler of the second embodiment, the amount of water sprayed at the 90 ° rotational position is larger than the amount of water sprayed at the 0 ° rotational position.

  For this reason, as shown in FIG. 9B, the watering distance at the watering position of 0 ° is D, but at the watering position of 90 °, the watering distance increases to a distance of D + A.

  Thus, according to the sprinkler of Example 2, water can be sprinkled at a distance D in the horizontal direction, and water can be sprinkled up to a distance A larger than this distance D in the vertical direction. As shown in FIG. 8, a rectangular frame W2 of 2D horizontal × D + A horizontal can be obtained.

  A third embodiment of the present invention is shown in FIG. This FIG. 13 shows the water flow port provided in the outer cylinder 22 and the inner cylinder 23 developed in the circumferential direction.

  The water passage port 23c provided in the inner cylinder 23 is a vertically long hole in the axial direction, and has the same pattern as the water passage ports 23a and 23b of the inner cylinder 23 described above, but at intervals of 90 °. The difference is that they are provided.

  The water flow port 22c provided in the outer cylinder 22 has a shape in which a vertically long hole long in the axial direction and a horizontally long hole circumferentially overlapped in a cross shape. The four water passage ports 22c are also provided at intervals of 90 °, but the length of the laterally long hole portion in the circumferential direction is selected to be shorter than the length of the 90 ° pitch of the outer cylinder 22, and adjacent water passage ports are provided. The port is not communicating.

  Also in the sprinkler of the third embodiment, when the inner cylinder 22 rotates relative to the outer cylinder 22, the water passage port 23c of the inner cylinder 23 scans the water passage port 22c of the outer cylinder 22. Depending on the rotation angle of the inner cylinder 23, the effective water flow area can be changed by overlapping with the water flow port 22c of the water flow port 23c, and the amount of jet water can be adjusted.

  When the rotation angle of the inner cylinder 23 is 0 °, 90 °, 180 °, and 270 °, the water passage port 23c of the inner tube 23 overlaps the entire vertically long hole portion of the water passage port 22c of the outer tube 22, so that the maximum effective passage is achieved. Since it becomes a water area, the amount of jet water becomes the maximum and the maximum watering distance can be obtained.

  When the rotation angle of the inner cylinder 23 reaches 45 °, 135 °, 225 °, and 315 °, the water flow ports 23c of the inner cylinder 23 are located between the water flow ports 22c of the outer cylinder 22, respectively. It is positioned and overlaps with the end of the horizontally long hole of the adjacent water passage port 22c, so that the minimum effective water passage area is obtained and the minimum amount of spray water is obtained.

  By changing the rotation angle of the inner cylinder 23 between the above-mentioned angles, the overlap between the water flow port 23c and the water flow port 22c is changed, so that the effective water flow area is changed from the maximum to the minimum or from the minimum. It changes to the maximum, and the amount of spray water can be adjusted according to the shape of the watering range.

  This Example 3 can also perform equal watering in the rectangular watering range.

1: Sprinkler 2: Pattern coupler 3: Injection pipe 33: Water injection nozzle 5: Rotation drive mechanism 51: Blade 52: Pressure receiving body 7: Reversing mechanism 8: Rotation limiting mechanism

Claims (5)

  A sprinkler provided with a rotation drive mechanism for rotating a nozzle body for water ejection by a predetermined angle in the circumferential direction by water ejection pressure is provided with a cylindrical pattern coupler coupled to a water supply pipe. An outer cylinder is inserted and fixed to the outer cylinder through a water supply space, an inner cylinder is rotatably inserted into the outer cylinder, and an injection pipe provided with an injection nozzle is coupled to the tip of the inner cylinder. A water passage port is provided in the cylinder so as to be able to communicate with the water supply space, and the first water passage port provided in one of the outer cylinder or the inner cylinder has a substantially constant width provided at predetermined equal intervals, and a vertical axis Is the second water passage port formed of a plurality of vertically elongated holes extending in the direction and provided in the other of the outer cylinder or the inner cylinder substantially the same as the length in the vertical direction of the vertically elongated hole of the first water passage port? A vertically long hole extending in the vertical axis direction to a shorter length, and It is composed of a plurality of holes having a composite shape in which horizontal elongated holes extending in the horizontal circumferential direction are overlapped on both sides from the vertically elongated holes so as to be approximately equal to the interval between the first water flow ports. A sprinkler.   2. The sprinkler according to claim 1, wherein a width of the longitudinal hole of the second water passage port is wider than a width of the longitudinal hole of the first water passage port.   The sprinkler according to claim 1, wherein one of the lateral widths of the horizontally elongated holes of the second water passage port is wider than the other.   The sprinkler according to any one of claims 1 to 3, wherein the rotation driving mechanism includes a reversing mechanism that reverses rotation at a set rotation angle.   The sprinkler according to any one of claims 1 to 4, further comprising a rotation limiting mechanism that limits a rotation amount of the rotation drive mechanism.

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