JPH0537118Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a pipe joint for connecting a cylindrical body used in a power spreader or the like.

(Prior Art) Conventionally, in a power spreader used for spraying agricultural chemicals, for example, as shown in FIG. The spray tube 5 is connected to the flexible tube 4 and sprayed through the spray tube 5.

As shown in FIGS. 7 to 10, the shape and usage condition of the spray tube 5 differ depending on the spraying work, and the spray tube 5 can be selectively connected to the flexible pipe 4 depending on the purpose of each work. ing.

In other words, in the case of spraying work using the rigid spray tube 5a as shown in FIGS. 7 to 9, the spray tube 5a is rotated around the tube axis around the flexible tube 4 in order to spray effectively. It is desirable to connect them so that they can move freely. Therefore, as shown in FIG. 12, a pipe joint 6a is rotatably provided on the side of the dispersing cylinder 5a, and this pipe joint 6a is fitted and fixed to the flexible pipe 4 so as to be freely insertable and removable.

Further, in the case of a spraying operation using a spraying tube (Azehose) 5b made of a flexible sheet material as shown in FIG. 10, if the Azehose 5b rotates, the work efficiency will be poor. Therefore, Azehose 5b
is connected to the flexible pipe 4 through a pipe joint 6b as shown in FIG. 13 so as not to rotate.
That is, one side of this pipe joint 6b is connected to the flexible pipe 4.
The Azehose 5 is inserted into and fixed to the other side in a removable manner.
b is removably fitted and fixed on the outside.

(Problems to be Solved by the Invention) However, conventionally, separate dedicated pipe joints 6a and 6b are required depending on the spraying work as described above. Therefore, there is a drawback that the number of parts of the pipe joints 6a, 6b increases, resulting in high cost.

Furthermore, when replacing the spray tube 5a and the adze hose 5b, separate pipe joints 6a and 6b are required, so the pipe joints 6a and 6b must be inserted into and removed from the flexible pipe 4. Replacement work is time-consuming and complicated.

In view of the above problems, the present invention reduces the number of parts of the pipe joint and reduces costs by making it possible to selectively connect cylindrical bodies in a rotatable or non-rotatable manner using a single pipe joint. It is an object of the present invention to provide a pipe joint for connecting cylindrical bodies that can be easily connected.

(Means for solving the problem) The technical means taken by the present invention to achieve the above object are as follows.

A fixed pipe joint 14 is fitted inside the end of one cylindrical body 10 in a non-rotatable manner; In the pipe joint for connecting a cylindrical body, the fixed pipe joint 14 has a rotary pipe joint 15 that is removably connected to the end of the pipe 13b in a relatively immovable manner. The position can be changed between a rotating position where it is detached from the shaped body 10 and can freely rotate, and a fixed position where the end of the rotating pipe joint 15 is fitted into one of the cylindrical bodies 10 and cannot be rotated. It is provided movably in the tube axis direction with respect to one cylindrical body 10.

(Function) When connecting the cylindrical bodies 10 and 13a so that they can rotate relative to each other, the fixed pipe joint 14 fitted inside the end of one of the cylindrical bodies 10 is pulled out and fixed at the rotational position. . Then, connect the other cylindrical body 13a to the rotary pipe joint 1.
Connect to 5. At this time, since the fixed pipe joint 14 and the rotary pipe joint 15 are relatively rotatable, relative rotation of the cylindrical bodies 10 and 13a is allowed.

In addition, when connecting the cylindrical bodies 10 and 13b so that they cannot rotate relative to each other, when the fixed pipe fitting 14 fitted inside one of the cylindrical bodies 10 is pushed in to change the position to the fixed position, the other cylindrical body The end of the rotary pipe joint 15 to which the shaped body 13b is connected is fitted into one of the cylindrical bodies 10. At this time, the rotary pipe joint 15 becomes unrotatable, and the relative rotation of the cylindrical bodies 10 and 13b is restricted.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

In Figures 1 to 6, reference numeral 10 denotes a flexible pipe of a backpack-type power spreader, which has a bellows part 11, through which powder and granules in a powder tank (not shown) are passed through a blower by the engine. It is adapted to be fed out into a flexible tube 10.

Reference numeral 12 denotes a pipe joint for selectively connecting a rigid spray tube 13a made of a synthetic resin material or the like and a spray tube (Azehose) 13b made of a flexible sheet material to the flexible pipe 10 according to the spraying operation. This is a fixed pipe fitting 14 and a rotating pipe fitting 1.
5.

The fixed pipe joint 14 has a sliding part 14 fitted into the end of the flexible pipe 10 so as to be slidable in the pipe axis direction.
a, and a support portion 14 having a smaller diameter than this sliding portion 14a.
It has b. Reference numeral 16 designates a plurality of rectifying plates, which are provided in plurality on the inner surface of the fixed pipe joint 14 in the pipe circumferential direction, as shown in FIG. 23 is a tightening band for fixing the sliding portion 14a to the flexible tube 10 at a predetermined position.

The rotary joint 15 is the support part 1 of the fixed pipe joint 14.
4b, and a connecting portion 15b, which has tapered surfaces 17a and 17b each having a larger diameter outwardly from the tube axis on both the inner and outer surfaces thereof. On the inner surface side of the end of the fitting part 15a, the fitting part 15a is engaged with a locking part 18 formed on the outer circumferential surface of the support part 14b so that the fitting part 15a can freely rotate around the tube axis and not come off. A claw portion 19 is formed. The locking portion 18 and the claw portion 19 may be provided over the entire circumferential length of the tube, or one of them may be provided at intervals in the circumferential direction.
Further, reference numeral 20 denotes an engagement protrusion formed on the inner peripheral surface of the connection portion between the fitting part 15a and the connection part 15b, and this engagement protrusion 20 is recessed in the end edge of the support part 14b of the fixed pipe joint 14. The fixed pipe joint 14 and the rotary pipe joint 15 are engaged with the provided step part 21 on the inner side of the tube axis, and together with the engagement between the locking part 18 and the claw part 19, the fixed pipe joint 14 and the rotating pipe joint 15 are engaged with each other.
relative movement in the axial direction is restricted. 10a
is a felt shield, which is interposed between the fitting part 15a and the support part 14b.

Further, the outer diameter of the fitting part 15a is the same as the outer diameter of the sliding part 14a, and the sliding part 14a is pulled out and the fitting part 15a is separated from the flexible tube 10, making it rotatable. It is possible to change the position between a rotating position and a fixed position where the end of the fitting part 15a is inserted into the flexible tube 10 and cannot be rotated.

Note that 24 is a stopper for positioning the sliding portion 14a at a fixed position, and is formed to protrude radially inward of the flexible tube 10.

A slit 24 is formed at the end of the connecting portion 15b of the rotary pipe joint 15 so that the diameter of the connecting portion 15b can be reduced. This slit 24 is provided at one location or in a plurality of locations in the tube circumferential direction.

Reference numeral 26 denotes a presser ring having a tapered surface 27 for fixing the dispersion tubes 13a, 13b to the connecting portion 15b, and is externally fitted onto the connecting portion 15b so as to be movable in the axial direction.

For example, when performing spraying work using the rigid spray tube 13a, the sliding portion of the fixed pipe joint 14 is moved so that the rotary pipe joint 15 can be rotated, as shown in FIGS. 2 and 3. 14a is tightened and fixed to the flexible tube 10 at the rotational position by a tightening band 23.
Next, the tapered portion 28 formed at the base of the dispersing tube 13a is fitted into the connecting portion 15b of the rotary pipe joint 14,
Move the holding ring 26 to the end side of the connecting portion 15b. At this time, the connecting portion 15b is reduced in diameter by the holding ring 26, and the holding ring 26 and the dispersing tube 13 are
Since the sprinkling tube 13a and the connecting portion 15b are tapered-fitted, the dispersing cylinder 13a is firmly fixed to the connecting portion 15b.
In order to remove the dispersing cylinder 13a, the holding ring 26 may be moved in the opposite direction to that described above.

In addition, when performing spraying work using the Azehose 13b, the sliding portion 14a should be adjusted so that the rotary pipe joint 15 does not rotate as shown in FIGS. 4 and 5.
When the flexible tube 10 is fixed at a fixed position, the end of the fitting part 15a fitted inside the flexible tube 10 is tightened by the tightening band 23 so as not to rotate. Next, Azehose 13b
Fit one end of the retainer ring 26 into the connecting portion 15b.
When moved toward the end of the connecting portion 15b, the holding ring 26 presses and fixes the fitting portion of the adze hose 13b to the connecting portion 15b from the outside. At this time, if a force is exerted on the Azehose 13b to pull it out, the fitting between the retaining ring 26 and the connecting portion 15b acts in the tightening direction, so the Azehose 13b is pulled out from the connecting portion 15b.
It can be firmly fixed.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can of course be applied to the connection of cylindrical bodies other than power spreaders. Can be used to connect shaped bodies. Further, the fitting between the connecting portion 15b and the dispersing tube 13a does not necessarily have to be a tapered fitting.

(Effects of the invention) According to the invention, the fixed pipe joint 14 has two positions: a rotation position where the rotation pipe joint 15 is detached from one cylindrical body 10 and can freely rotate, and an end of the rotation pipe joint 15. Since it is provided so as to be movable in the tube axis direction with respect to one cylindrical body 10 so that it can be moved to a fixed position where the part fits inside the one cylindrical body 10 and cannot rotate. A single pipe joint 12 can selectively connect one cylindrical body 10 and the other cylindrical bodies 13a, 13b in a relatively rotatable or non-rotatable manner. Therefore, the number of parts of the pipe joint 12 can be reduced, and costs can be reduced. In addition, there is no need to insert or remove the fixed pipe joint 14 into or out of one of the cylindrical bodies 10.
One cylindrical body 10 and the other cylindrical bodies 13a, 13b
You can simply concatenate them.

[Brief explanation of drawings]

Figures 1 to 6 show embodiments of the present invention;
The figure is a sectional view showing a state in which the pipe joint is connected to a flexible pipe, Fig. 2 is a half sectional view showing a state in which a dispersion cylinder is rotatably connected to a flexible pipe, Fig. 3 is a sectional view of the same main part, Figure 4 is a half-sectional view showing the state in which the adzehose is unrotatably connected to the flexible pipe.
Figure 5 is a cross-sectional view of the same main part, and Figure 6 is - of Figure 1.
Line sectional views, FIGS. 7 to 13 show conventional examples, FIGS. 7 to 10 are explanatory diagrams showing the spreading state with the power spreader, and FIG. 11 is a perspective view of the power spreader, and FIG. 12 and 13 are sectional views of main parts. 10...Flexible tube (cylindrical body), 13a,
13b...Scatter tube, 14...Fixed pipe joint, 15...
...Rotary pipe joint.

Claims (1)

[Claims for Utility Model Registration] A fixed pipe fitting 14 is fitted inside the end of one cylindrical body 10 in a non-rotatable manner, and a fixed pipe fitting 14 is fitted on the outside so as to be relatively rotatable around the axis. and a rotary pipe joint 15 that is detachably connected to the end of the other cylindrical body 13a, 13b in a relatively immovable manner, the fixed pipe joint 14 is rotatable. A rotation position where the movable pipe joint 15 is detached from one cylindrical body 10 and becomes freely rotatable, and a rotation position where the end of the rotary pipe joint 15 is separated from one of the cylindrical bodies 10.
For connecting a cylindrical body, characterized in that it is provided movably in the tube axis direction with respect to one cylindrical body 10 so that the position can be changed between a fixed position where it is fitted inside and cannot be rotated. pipe fittings.