JPS6314927Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a chemical solution spraying rod that sprays a chemical solution from a nozzle attached to its tip.

When spraying a chemical solution in a narrow space such as a greenhouse, or in a place where plants with uneven heights are grown, if the length of the spraying rod is constant, the amount of the chemical solution tends to be uneven. There are also problems with workability.

Therefore, this invention has developed a chemical spraying rod whose length can be adjusted arbitrarily, which is easy to adjust, and which can reliably prevent liquid leakage between pipe connections. is intended to provide.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in the figure, a large diameter pipe 1 has a grip 2 at one end, a male thread 3 formed on the outer periphery of the other end, and a large diameter hole 4 inside the other end. It is provided. One end of a small diameter pipe 10 is inserted inside this large diameter pipe 1. On the outside of the small diameter pipe 10 is a tightening cylinder 20, a sleeve 30 is placed on the large diameter pipe 1 from the tightening cylinder 20, a pair of washers 40 are placed on the large diameter pipe 1 from this sleeve 30, and a pair of washers 40 are provided between the washers 40. nith
1O rings 50 are fitted to each other, and the tightening cylinder 20 can be screwed onto the male thread 3 of the large diameter pipe 1.

The outer diameter of the sleeve 30 is regulated to a size that allows it to be inserted into the large diameter hole 4 of the large diameter pipe 1, and the length of the sleeve 30, the thickness of the pair of washers 40, and the wire diameter of the first O ring 50 The dimensions including
It is larger than the depth of the large diameter hole 4. Therefore, when the sleeve 30 is inserted into the large diameter hole 4 and the washer 40 is brought into contact with the shoulder 4' of the large diameter hole 4, a part of the sleeve 30 protrudes from the large diameter hole 4 and this The protruding portion is formed on the large diameter shaft portion 31. The outer periphery 31' of the large diameter shaft section 31 is tapered, and a plurality of slits 32 are provided in the axial direction from the end of the large diameter shaft section 31. On the other hand, the inner circumference 20' of the tightening cylinder 20 is the outer circumference 3 of the large diameter shaft portion 31.
It has a taper corresponding to 1'.

An end cylinder 11 is fixed to the end of the small-diameter pipe 10 inserted into the large-diameter pipe 1, and a second O-ring 60 is fitted into a circumferential groove 12 formed on the outer periphery of the end cylinder 11. The outer periphery of the pipe 60 is in close contact with the inner periphery of the large diameter pipe 1.

Note that the number of circumferential grooves 12 provided in the end cylinder 11 is arbitrary.

In the figure, 13 is a nozzle attached to the tip of the small diameter pipe 10.

Now, by rotating and loosening the tightening cylinder 20 and moving the small diameter pipe 10 in the axial direction, the length of the spreading rod can be adjusted as desired.

After adjusting the length of the spreading rod, when the tightening cylinder 20 is rotated in the opposite direction and tightened, this tightening cylinder 20
When the inner periphery 20' of the sleeve 30 engages with the outer periphery 31' of the large-diameter shaft portion 31 of the sleeve 30 and the tightening cylinder 20 is further rotated in the same direction, the inner periphery of the tightening cylinder 20 engages with the outer periphery 31' of the large diameter shaft portion 31 of the sleeve 30. In order to press the outer periphery 31' of the large-diameter shaft part 31, the sleeve 30 moves in the axial direction, and the first O-ring 50 located between the end of the sleeve 30 and the shoulder 4' of the large-diameter hole 4 is compressed. As a result, airtightness between the inner periphery of the large diameter hole 4 and the outer periphery of the small diameter pipe 10 is maintained. In addition, the large diameter shaft portion 3 of the sleeve 30
1 is pressed inward by the tapered inner periphery 20' of the operating cylinder 20, so the end of the sleeve 30 where the slit 32 is formed reduces in diameter and presses the outer periphery of the small diameter pipe 10 inward. However, this can prevent the small diameter pipe 10 from moving in the axial direction.

As described above, according to this invention, the length of the spreading rod can be adjusted arbitrarily by the simple action of rotating and loosening the tightening cylinder and moving the small diameter pipe in the axial direction. Furthermore, by rotating and tightening the tightening cylinder, the slit-formed end of the sleeve deforms in the radial direction and presses the outer circumference of the small-diameter pipe inward, which prevents axial movement of the small-diameter pipe. can be reliably prevented. Additionally, when the tightening cylinder is rotated and tightened, the sleeve is pushed in the axial direction and moved to the side of the large diameter pipe before the slit-formed part of the sleeve contracts. The first O-ring is compressively deformed and comes into close contact with the inner periphery of the large diameter hole and the outer periphery of the small diameter pipe, while the outer periphery of the second O ring, which is fitted onto the outer periphery of the end of the small diameter pipe, comes into close contact with the inner periphery of the large diameter pipe. Therefore, the first and second O-rings can reliably prevent liquid leakage at the pipe connection.

[Brief explanation of the drawing]

Figure 1 is a front view of the spreading rod according to this invention, Figure 2 is an enlarged front view of the same pipe connection section showing only the tightening cylinder body, and Figure 3 is an enlarged view of Figure 2. FIG. 1...Large diameter pipe, 3...Male thread, 4...Large diameter hole, 10...Small diameter pipe, 12...Peripheral groove, 20
...Tightening cylinder, 20'...Inner periphery, 30...Sleeve, 31...Large diameter shaft section, 31'...Outer periphery, 32...
...Slit, 50...1st O-ring, 60...No.
2O rings.

Claims (1)

[Scope of utility model registration request] A large-diameter pipe with a male thread formed on the outer periphery of its end, a small-diameter pipe with one end inserted into the large-diameter pipe, and a fastener that fits on the outside of the small-diameter pipe and can be screwed onto the male thread of the large-diameter pipe. The outside of the small diameter pipe has a sleeve that can be inserted into a large diameter hole provided inside the end of the large diameter pipe.
Fit the first O-ring between the end of the sleeve to be inserted into the large-diameter hole and the shoulder of the large-diameter hole. A large-diameter shaft is formed at the end thereof, and a plurality of slits are provided in the axial direction from the end of the large-diameter shaft, and the outer circumference of the large-diameter shaft is tapered. The inner periphery is tapered to correspond to the outer periphery of the large diameter shaft,
A chemical solution dispersing rod characterized in that a second O-ring that tightly contacts the inner circumference of the large diameter pipe is fitted into a circumferential groove formed on the outer circumference of the end of the small diameter pipe.