JPS605810Y2 - irrigation hose - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a irrigation hose made of a thermoplastic resin film that has flow paths that are independently partitioned by partition walls and continuous in the longitudinal direction.

Such irrigation hoses are installed very close to crops, for example between ridges, and water from the supply source is applied to the outer wall of the hose in the longitudinal direction using pump pressure or water pressure due to head difference. Currently, a method of irrigation by sprinkling water from small watering holes drilled along the ridge is currently in practical use as a drip system.

However, most of the small watering holes of conventionally used irrigation hoses are drilled in a line in a longitudinal direction at the top of the outer wall that forms a cylindrical longitudinal section, with the supply path side as the bottom. Because of this, irrigation is generally directed upwards into the sky, which not only often damages the leaves of crops, but also allows soil particles and debris to enter the hose through these holes. It can get stuck in there and cause a blockage.

In addition, since the hose has a cylindrical cross section, it is unstable to sit on, making it impossible to always direct water in one direction in a stable manner. The purpose is to provide.

The irrigation hose of the present invention, which is made of thermoplastic resin film and which is partitioned independently by partition walls and has continuous flow paths in the longitudinal direction, is a long hose with small communication holes bored in the longitudinal direction. Both side edges of the elongated outer wall are melt-sealed to the front and back sides of both side edges of the partition wall to form a flat polymerized piece,
At the same time, unsealed portions are provided at intervals along the sealed portion of the front side outer wall to form small holes for watering, and a portion of the front side outer wall and the partition wall is left unsealed at appropriate intervals in the longitudinal direction and the perpendicular direction. It is melt-sealed while leaving the melt-sealed part.

Further, if necessary, a sheet-like opening material can be installed between the back side outer wall and the partition wall.

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a perspective view of one embodiment of the irrigation hose according to the present invention, with a front outer wall and a partition wall partially cut away.

2 to 4 are cross-sectional views taken along vertical lines I--I, ■--■, and ■--■ in FIG. 1, respectively.

Note that each of these drawings is illustrated in a usage form.

The irrigation hose is constructed by melt-sealing a long front side outer wall 1, a partition wall 2, and a back side outer wall 3, each of which is made of a thermoplastic resin film, at both side edges of each.

Therefore, when water is not supplied, this irrigation hose is in the form of a polymeric sheet with no bulge made of overlapping films, but when water is supplied, the entire hose becomes rounded due to the water pressure, and by adjusting the water pressure. It can be inflated to a circular cross section.

As the thermoplastic resin film, a medium to high density polyethylene film with a thickness of about 100 to 200 μm, preferably about 140 to 180 μm, containing a weathering stabilizer such as carbon black, is preferably used. Polyolefin films, polyvinyl chloride films, etc. can also be used.

The space between the partition wall and the back side outer wall forms a water supply channel 4. The water supplied from this supply channel passes through small communication holes 5 drilled at intervals of, for example, about 15 to 300 along the longitudinal direction. The water is introduced into a sprinkler channel 6 formed in the space between the partition wall and the front outer wall.

This communicating small hole may be circular, square, or slit-shaped, and the diameter of the hole or the length of the slit is suitably about 0.5 to 5 c1n.

When both side edges of the outer wall are melt-sealed on the front and back sides of both side edges of the partition, substantially flat overlapping pieces 7 are formed there.

An irrigation hose in which such flat polymeric pieces are provided on both side edges of the partition wall has good sitting stability, and therefore has the effect of always keeping the direction of irrigation from the small watering holes constant.

In addition, since the watering small holes close in a slit shape when the hose is deflated except during irrigation, they have the effect of preventing dirt particles and dirt from entering the hose from outside.

When the melt-sealed portions on both side edges of the front side outer wall form a flat overlapping piece, the water sprinkling holes 9 are provided along the side edges 7 of the front side outer wall at intervals of, for example, about 10 to 15 cm.

Such small holes can be formed by providing unfused portions at intervals on both side edges of the front outer wall.

These small watering holes have a pore diameter of approximately 0.5 to
It is preferable to adjust it to about 5 crIt.

Generally, crops are often planted in rows in two or more rows in parallel, and as a method of irrigation, a hose for irrigation is installed in the middle position between adjacent rows, and the crops planted in rows on both sides are It is essentially desirable for the growth of agricultural crops to irrigate the leaves at the same time and evenly (or unevenly in some cases), and in such a way that the water does not directly hit the leaves.

The irrigation hose of the present invention, which has small holes for watering along the welded parts on both edges of the front outer wall, fully satisfies these requirements.

Moreover, irrigation can be done using a drip type by adjusting the water pressure of the water supplied, and even if the water pressure is low like the drip type, water is supplied from the end of the hose, so only the water supply port side can be used. This prevents a situation in which more water is applied and water cannot be applied to the end of the hose.

That is, it is excellent in water uniformity, and continuous water spray type irrigation can be performed by increasing the water pressure.

Japanese Patent Laid-Open No. 50-143 proposed a method of blocking the sprinkling channel of an irrigation hose used in a drip system with an appropriate gap by an appropriate means to maintain a constant water pressure in the sprinkling channel.
No. 107, Utility Model Application Publication No. 51-142260-1,
Utility Model Publication No. 52-87553 and Special Publication No. 53-27
It is described in Publication No. 173, etc.

However, the water used for irrigation is not only tap water but also various types of natural water, which can easily cause clogging.
For this reason, complex proposals have also been made to solve the difficult problem of cleaning the inside of the sprinkler channel without impairing the blocking effect of the blocking section provided in the sprinkler channel.

In addition, by deforming the bulkhead that separates the supply channel and the sprinkler channel so that it protrudes toward the sprinkler channel side with an appropriate gap along the length, it is possible to completely block off the sprinkler channel by leaving a part of the passage gap. Although it is proposed in Japanese Patent No. 53-47035, it is not easy to form the lower complete cutoff part by protruding deformation of the partition wall, and cleaning the inside of the hose requires injecting high-pressure water or air. This is done by causing the protruding deformation part that forms the incomplete cutoff part to protrude in the opposite direction toward the supply path, so if the cleaning operation that involves changing the deformation direction is repeated, There is a high possibility that the properties of the deformable member will gradually deteriorate and eventually it will not be able to achieve the desired blocking effect.

The irrigation hose of the present invention is made by melt sealing 11 between the front outer wall and the partition wall at an appropriate interval, for example, about 5 meters, leaving a part 10 unsealed in the direction perpendicular to the longitudinal direction. The formation of such an incomplete cut-off part in a sprinkler channel is extremely easy because it is simply sealed with a melt-sealing machine, and the substances to be cleaned and removed inside the hose can also be discharged from this unmelted part. This can be easily done by simply squeezing or squeezing the hose with your hands, etc., and squeezing it out of the hose.

As a result of forming such an incomplete cut-off part and making the sprinkler channels of adjacent cut-off segments communicate with each other, the high and low parts of each cut-off segment that can be seen when the irrigation hose is used on a slope. The difference in water pressure between the parts can be made extremely small, and even if there are changes in water pressure or amount of water, completely uniform watering can be achieved using a drip type method.

Between the partition wall and the rear outer wall, a sheet-like opening material 12 made of a water-permeable nonwoven fabric made of thermoplastic synthetic fibers is installed by welding the edges on both sides together, and is made of water, especially using natural water. It is preferable to prevent clogging of the communicating holes and watering holes in advance.

As described in detail above, the irrigation hose according to the present invention has excellent sitting stability during use, so it can always irrigate in a fixed direction.

Shimoso can be watered evenly at the same time without damaging the leaves of the mineral crops on both sides, and even on slopes, it can be completely drip-type watered with almost constant water pressure from each small watering hole. It has excellent effects from a practical point of view.

In addition, since the irrigation hose of the present invention is in the form of a sheet with overlapping films when not in use, it is easy to wind up into a roll, and the wound hose is not bulky.
Easy to store and transport.

Furthermore, when in the sheet state, the small watering holes are substantially closed, which prevents dirt particles, dirt, etc. from entering from the outside, and prevents clogging.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of one embodiment of the irrigation hose according to the present invention, with a front outer wall and a partition wall partially cut away. 2 to 4 are longitudinal cross-sectional views taken along lines I-I, line nn, and mm in FIG. 1, respectively. Note that each of these drawings is shown in a state of use. In these drawings, numeral 1 is the front outer wall, 2 is the partition wall,
3 is a back side outer wall, 5 is a small communication hole drilled in the partition wall, 7 is a flat polymer piece, 9 is a small hole for watering, and 11 is a melt seal that leaves an unmelted portion 10 between the front side outer wall and the partition wall. portions, and 12 each designate a sheet of oral material.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A flat polymeric piece is formed by melt-sealing both side edges of a long outer wall on the front and back sides of both side edges of a long partition wall in which communicating holes are bored along the longitudinal direction. At this time, unfused portions are provided at intervals along the sealing portion of the front side outer wall to form small holes for watering, and the front side outer wall and the partition wall are spaced at appropriate intervals in a direction perpendicular to the longitudinal direction. A irrigation hose made of thermoplastic resin film that is formed by melt-sealing while leaving some unsealed parts to form channels that are independently partitioned by partition walls and continuous in the longitudinal direction. 2. The irrigation hose as set forth in claim 1 of the utility model registration claim, in which a sheet-like opening material is installed between the partition wall and the rear outer wall.