JP2736754B2 - Telescopic spray rod - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic spray rod used for a sprayer or the like, and more particularly to a structure of a connecting portion for connecting a plurality of spray rods.

[0002]

2. Description of the Related Art Various types of connecting structures of telescopic spray rods have heretofore been proposed and put into practical use. In such telescopic spray rods, when not in use, the inner pipe is housed in the outer pipe and is short. In use, it is necessary that the inner tube be pulled out from the outer tube and extended in use, and that the connection between the two tubes be securely fixed and have a high degree of watertightness.

[0003] The connecting portion of the telescopic spray rod as described above is generally provided with a screw at the pipe end of the outer pipe and tightening a nut from the inner pipe side to cooperate with another member such as a sleeve. The rods are fixed and watertight between the rods. Representative examples of such a connecting portion of the telescopic spray rod are disclosed in Japanese Utility Model Publication No. Sho 62-25246 (hereinafter referred to as Conventional Example 1) and Japanese Utility Model Publication No. 4-33981 (hereinafter referred to as Conventional Example 2). There is a device.

In the device of the prior art 1, a tapered screw is provided by forming the pipe end of the outer pipe into a tapered shape, and a plurality of slits are provided in the tapered screw to impart elasticity. Or a screw that is screwed into the end of the outer tube, and the screw has a threaded hole whose rear end is tapered. The tightening nut is screwed via a spring washer to fix the both together.

In the device of the prior art 2, the diameter of the outer end of the outer tube is increased, and a screw is provided in the enlarged diameter. Insert a sleeve formed in a shape and provided with a plurality of slits,
A cap having a pressing portion of a sleeve on the inner wall is screwed into the screw of the outer tube from the inner tube side to fix them integrally.

[0006]

SUMMARY OF THE INVENTION The invention disclosed in the prior art 1 includes several processes such as drawing for forming the end of the outer tube into a tapered shape, threading for the tapered portion, and slitting for the tapered portion. The other device only requires threading at the end of the tube, but it requires the use of a drawn tube for the outer tube from the point of accuracy, and in any case, the production is It is troublesome and cost increase is inevitable.

In the device of the prior art 2, the end of the outer tube is enlarged in diameter and threading is performed on the enlarged diameter. In this case, too, the threading cost is included in the cost of parts and materials. It occupies a large proportion, and there are various problems such as the necessity of providing packing for backup in terms of processing accuracy.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a telescopic spray rod having a simple structure and a reduced cost without performing any screw processing on an outer pipe and an inner pipe. It is what it was.

[0009]

[Means for Solving the Problems]

(1) In the telescopic spray rod according to the present invention, the rear part of the through hole provided at the center is enlarged in diameter, and the first cap nut provided with an internal thread and the through hole of the first cap nut are inserted. A receiving portion consisting of an outer tube whose end is enlarged in diameter and a flare is formed,
A second cap nut having a through hole in the center and a female screw provided at the front of the through hole, a through hole in the center, and a tapered portion formed by reducing the diameter on both sides from substantially the center of the outer periphery. The sleeve inserted into the enlarged diameter portion of the second cap nut, the rear portion of the through hole provided in the center portion is enlarged in diameter to form a taper portion having an angle smaller than the taper portion of the sleeve, and the front portion of the outer periphery has 0 mm. A connection member having a ring attached thereto and having external threads screwed to female threads of the first cap nut and the second cap nut with a knob portion interposed therebetween, a second cap nut, and a sleeve. And a connecting portion formed of an inner tube inserted into the through hole of the connecting member and having a through hole and having a retaining member inserted into the outer tube fixed to the end. .

(2) Further, in the telescopic spray rod according to the present invention, the rear part of the through hole provided at the center is enlarged in diameter and a cap nut provided with a female screw is inserted through the through hole of the cap nut. A receiving part consisting of an outer tube with an enlarged diameter at the end and a flare formed, and a front part of a through hole provided at the center part is enlarged in diameter, and a male screw screwed into the female screw of a cap nut at the outer peripheral part A connection bolt having a through hole in the center, a tapered portion formed by tapering on both sides from a substantially central portion of the outer periphery, and a sleeve inserted into the enlarged diameter portion of the cap nut; and a connection bolt and a sleeve. And a connection portion formed by an insertion portion formed of an inner tube having a through hole and being inserted into the outer tube and having a retaining member fixed to an end thereof.

[0011]

[Action]

(1) After inserting the through hole of the first cap nut into the outer tube, its end is enlarged in diameter to form a flare, and this flare is formed with a step (flare pressing portion) formed in the enlarged diameter portion of the through hole. ) To prevent slipping out. In addition, the through hole of the connection member equipped with the second cap nut, the sleeve, and the O-ring is inserted into the inner pipe, and the retaining member is fixed to the end thereof. Then, the retaining member is inserted into the outer tube, and the external thread of the connecting member is screwed into the female thread of the first cap nut.
The female screw of the cap nut is screwed into the external screw of the connecting member.

Thus, the O-ring provided on the connecting member is pressed against the flare pressed by the flare pressing portion of the first cap nut to hold the outer tube and the connecting member watertight, and the sleeve is provided with the second sleeve. The cap member is pressed by the sleeve pressing portion of the cap nut and the tapered portion of the connecting member and is pressed against the inner tube, thereby maintaining the connection member and the inner tube watertight. At this time, if the inner pipe is pulled out from the outer pipe, the inner pipe is integrally fixed to the outer pipe in an extended state. If the sleeve cap is released by loosening the second cap nut, the inner tube becomes free, so
The inner tube can be pushed and stored in the outer tube.

(2) After inserting the through hole of the cap nut into the outer tube, the end thereof is enlarged to form a flare, and the flare is formed with a step (flare) formed at the enlarged portion of the through hole. (Pressing portion) is locked to prevent slippage. Also, connection bolts,
The through hole of the sleeve is inserted into the inner tube, and the retaining member is fixed to the end. Then, the retaining member is inserted into the outer tube, and the external thread of the connection bolt is screwed into the female thread of the cap nut.

Thus, the sleeve is pressed against the flare pressed by the flare pressing portion of the cap nut,
It is pressed by the sleeve pressing portion of the connection bolt and crimped to the inner tube, and keeps the space between the outer tube and the inner tube watertight. At this time, if the inner pipe is pulled out from the outer pipe, the inner pipe is integrally fixed to the outer pipe in an extended state. If the connection bolt is loosened to release the pressing of the sleeve, the inner tube becomes free, so that the inner tube can be pushed into the outer tube and stored.

[0015]

【Example】

Embodiment 1 FIGS. 7 and 8 are explanatory views showing the entire configuration of the telescopic spray rod according to the present invention in the use state of the first embodiment. In the figure, 1 is an outer tube, 3 is a base nut provided at the base end of the outer tube 1 and connected to a sprayer. Reference numeral 5 denotes an inner pipe having a diameter smaller than the inner diameter of the outer pipe 1, and a nozzle 6 is provided at a tip portion thereof. 10 is a synthetic resin molded product,
And a connecting portion where the inner tube 5 is extendably connected.
6 will be described in detail. In the following description, the base nut 3 side is referred to as a front part, and the nozzle 6 side is referred to as a rear part.

In FIG. 1, reference numeral 11 denotes a first cap nut.
As shown in FIG. 2, a through hole 12 slidably inserted into the outer tube 1 is provided in the center portion.
Are sequentially expanded from the front part to the rear part to become first and second enlarged diameter parts 13 and 14, and the first and second enlarged diameter parts 13 and 1 are enlarged.
The flare pressing portion 15 is formed by a step portion provided between the second enlarged diameter portion 14 and a female screw 16 is provided on the rear side of the second enlarged diameter portion 14.
Is provided.

Reference numeral 21 denotes a retaining member which is slidably inserted into the outer tube 1. As shown in FIG. 3, a through hole 22 through which an aqueous solution passes is provided in the center portion, and a groove portion is provided on the outer periphery of the rear portion. 2
3 are formed. The front end of the inner tube 5 is fixed by caulking to the groove 23, and the two are integrally joined. Reference numeral 20 denotes an O-ring.

As shown in FIG. 4, a connecting member 31 has a through hole 32 slidably inserted into the inner tube 5 at the center, and an opening at the rear of the through hole 32. A tapered portion 33 whose diameter is increased toward the bottom is formed. The inner diameter of the through hole 32 is smaller than the outer diameter of the retaining member 21. The fitting portion 34 of the O-ring 20 and the first cap nut 1
A cylindrical portion 35 inserted into the first second enlarged-diameter portion 14, and a first male screw 3 screwed into the female screw 16 of the first cap nut 11.
6. A large-diameter knob 37 and a second male screw 38 are provided.

Reference numeral 41 denotes a sleeve, which is provided with a through hole 42 inserted into the inner tube 5 at the center, as shown in FIG. It is an abacus ball shape having a diameter and tapered portions 43 and 44 formed, and a slit 45 is provided in the tapered portion 44.
Although the slit 45 may be omitted, the operability is better if it is provided. The angle of the tapered portion 43 is slightly larger than the angle of the tapered portion 33 provided in the through hole 32 of the connection member 31.

Reference numeral 51 denotes a second cap nut. As shown in FIG. 6, a through hole 52 slidably inserted into the inner tube 5 is provided at the center, and this through hole 52 is provided from the rear. First and second enlarged diameter portions 53 and 54 are sequentially enlarged in diameter toward the front portion.
The sleeve pressing portion 55 is formed by a step provided between the two enlarged diameter portions 53 and 54, and an internal thread 56 is provided on the front side of the second enlarged diameter portion 54. .

Next, the connecting portion 1 composed of the above-described respective portions is described.
An example of the assembling order of 0 and its operation will be described. First, the through hole 12 of the first cap nut 11 is inserted into the outer tube 1 and its end is expanded to form a flare 1a.
Is configured. As a result, even if the first cap nut 11 slides along the outer tube 1, the flare pressing portion 15 is
The outer tube 1 does not come off because it is locked to a and further sliding is restricted.

Next, a second cap nut 51 is attached to the inner pipe 5.
, The through hole 42 of the sleeve 41, and the through hole 32 of the connecting member 31 to which the O-ring 20 is attached, are sequentially inserted, and the front end thereof is fixed by caulking in the groove 23 of the retaining member 21. A part B is configured. Thereby, even if the connecting member 31 slides along the inner pipe 5, the through hole 3
Since the inner diameter of 2 is smaller than the outer diameter of the retaining member 31, further sliding is restricted and it does not fall out of the inner tube 5.

Next, the retaining member 21 and a part of the inner tube 5 are inserted into the outer tube 1 from the opening of the outer tube 1, and the inner tube 5 is inserted.
The first external thread 36 of the connecting member 31 is screwed into the internal thread 16 of the first cap nut 11 in a state in which is pulled out from the outer tube 1. As a result, the O-ring 20 becomes the flare 1a of the outer tube 1.
Between the outer tube 1 and the connecting member 31 in a watertight manner. At this time, the inner tube 5 is slidable with respect to the outer tube 1 and the connecting member 31.

Subsequently, the second cap nut 51 is inserted into the sleeve 4.
1 along the inner tube 5 and the second cap nut 5
The first female screw 56 is lightly screwed into the second male screw 38 of the connecting member 31. At this time, the sleeve 41 is located inside the enlarged diameter portion 54 of the second cap nut 51. Next, when the second cap nut 51 is further screwed in after the inner tube 5 is slid to a desired appropriate position, the tapered portion 43 of the sleeve 41 is inserted into the tapered portion 33 of the connecting member 31. Since the angle of the tapered portion 43 of the sleeve 41 is formed larger than the angle of the tapered portion 33 of the connecting member 31 as described above, the sleeve 41 is formed by the tapered portion 33 of the connecting member 31 and the sleeve of the second cap nut 51. It is pressed by the pressing portion 55 and is pressed against the inner tube 5. As a result, the inner pipe 5 is fixed to the outer pipe 1 at a desired appropriate position, and the gap between the inner pipe 5 and the connecting member 31 is kept watertight. FIG. 7 shows a state where the spray rod is extended to the maximum during use.

When not in use, when the second cap nut 51 is loosened, the connection between the sleeve 41 and the inner tube 5 is released, and the inner tube 5 becomes free.
Push into the outer tube 1 until 1) hits the packing mounted in the base nut 3 and tighten the second cap nut 51 again. Thereby, most of the inner tube 5 is accommodated in the outer tube 1 and is fixed at that position. FIG. 8 shows the state at this time.

Embodiment 2 FIG. 9 is a cross-sectional view of a connecting portion which is a main part of a second embodiment of the present invention. In the present embodiment, the connection member 31 in the first embodiment is omitted, and a connection bolt 61 is provided instead of the second cap nut 51. The outer pipe 1, the inner pipe 5, the first cap nut 11, the retaining member 21 and the sleeve 41 have substantially the same structure as that of the first embodiment.

The connecting bolt 61 is formed in a substantially T-shaped cross section by a head and a reduced diameter leg, and the leg has a first cap nut 11 (hereinafter referred to as a cap nut in this embodiment).
A male screw 64 that is screwed into the female screw 16 is provided,
A through hole 62 is provided at the center. The front part of the through hole 62 is enlarged in diameter toward the opening to form a sleeve pressing part 63.

In this embodiment constructed as described above, the receiving portion A is constituted by the outer tube 1 and the cap nut 11 inserted into the outer tube 1, and the inner tube 5 and the connection bolt inserted into the inner tube 5 are formed. The insertion portion B is constituted by the retaining member 21, the front end of the sleeve 41 and the inner tube 5 caulked and fixed to the groove 23. Now, the retaining member 21 and a part of the inner pipe 5 are inserted into the outer pipe 1 from the opening of the outer pipe 1, and the connection bolt 61 is inserted into the sleeve 41 with a part of the inner pipe 5 pulled out from the outer pipe 1. Together with the female screw 16 of the cap nut 1.

Then, after the inner tube 5 is slid to a desired appropriate position and the connection bolt 61 is further screwed in, the front portion of the sleeve 41 is pressed against the outer tube 1 pressed by the flare pressing portion 15 of the cap nut 11. The tapered portion 44 is pressed against the flare 1 a and the sleeve pressing portion 6 of the connection bolt 61.
3 is pressed. Thereby, the inner pipe 5 is fixed to the outer pipe 1 at a desired appropriate position, and the space between the inner pipe 5 and the outer pipe 1 is kept watertight.

When not in use, loosen the connection bolt 61,
Since the connection between the sleeve 41 and the inner tube 5 is released and the inner tube 5 becomes free, the inner tube 5 is pushed into the outer tube 1 until its distal end (retaining member 21) hits the packing mounted in the original nut 3. Tighten the connection bolt again. Thereby, most of the inner tube 5 is accommodated in the outer tube 1 and is fixed at that position.

[0031]

【The invention's effect】

(1) As is clear from the above description, the telescopic spray rod according to the present invention has a first cap nut in which the rear part of a through hole provided in the center is enlarged and a female screw is provided, and A receiving portion formed of an outer tube having a flare formed by being inserted into a through hole of the cap nut and having an enlarged end portion, and a female screw provided by expanding a front portion of the through hole provided at the center portion; A second cap nut having a through hole in the center, a sleeve inserted into the enlarged diameter portion of the second cap nut having a tapered portion formed by tapering on both sides from a substantially central portion of the outer periphery; The diameter of the rear portion of the provided through hole is enlarged to form a taper portion having an angle smaller than the taper portion of the sleeve, and an O-ring is attached to the front portion of the outer periphery. A connecting member provided with a male screw to be screwed with the female screw of the second cap nut, respectively; Since the cap is inserted into the cap nut, the sleeve, and the through-hole of the connecting member, and the retaining member having the through-hole and inserted into the outer tube is constituted by the inserting portion formed by the inner tube fixed to the end portion, the connecting portion is constituted. The following effects can be obtained.

That is, in the present invention, since the outer pipe and the inner pipe are not threaded, an inexpensive extruded pipe can be used. As a result, drastic cost reduction can be achieved. In addition, a O-ring is provided at the front end of the connecting member, and a sleeve is provided at the rear end, and the sleeve is pressed by the flare of the outer tube, the connecting member and the second cap nut, so that the inner tube is fixed. And a watertight function can be reliably exhibited.

(2) Further, in the telescopic spray rod according to the present invention, the rear part of the through hole provided at the center is enlarged in diameter and a cap nut provided with a female screw is inserted through the through hole of the cap nut. A receiving part consisting of an outer tube with an enlarged diameter at the end and a flare formed, and a front part of a through hole provided at the center part is enlarged in diameter, and a male screw screwed into the female screw of a cap nut at the outer peripheral part A connection bolt having a through hole in the center, a tapered portion formed by tapering on both sides from a substantially central portion of the outer periphery, and a sleeve inserted into the enlarged diameter portion of the cap nut; and a connection bolt and a sleeve. The stopper is inserted into the through-hole, and the stopper having the through-hole and inserted into the outer tube constitutes the connecting portion with the insertion portion having the inner tube fixed to the end. And the structure is simple and the number of parts is small. It is possible to perform down.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a connecting portion forming a main part of a first embodiment of the present invention.

FIG. 2 is a sectional view and a side view of a first cap nut of FIG. 1;

FIG. 3 is a cross-sectional view and a side view of the retaining member of FIG. 1;

FIG. 4 is a partial sectional view and a side view of the connecting member of FIG. 1;

FIG. 5 is a partial sectional view of the sleeve of FIG. 1;

FIG. 6 is a sectional view and a side view of the second cap nut of FIG. 1;

FIG. 7 is an explanatory view showing the entire configuration of the present invention, and shows a state where the spray rod is extended to the maximum.

FIG. 8 is an explanatory view showing a state where the inner pipe of FIG. 7 is housed in an outer pipe.

FIG. 9 is a cross-sectional view of a connecting portion forming a main part of a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer pipe 1a Flare 3 Main port nut 5 Inner pipe 6 Nozzle 10 Connection part 11 First cap nut 12 Through hole 13,14 Large diameter part 15 Flare pressing part 16 Female thread 200 O ring 21 Detachment preventing member 22 Through hole 31 Connection member 32 Through hole 33 Taper portion 34 O-ring fitting portion 36, 38 Male thread 37 Knob portion 41 Sleeve 42 Through hole 43, 44 Tapered portion 51 Second cap nut 52 Through hole 53, 54 Large diameter portion 55 Sleeve Pressing part 56 Female thread 61 Connection bolt 62 Through hole 63 Sleeve pressing part 64 Male screw A Receiving part B Insertion part

Claims (2)

(57) [Claims] 1. A first cap nut provided with a female screw provided with a rear part of a through hole provided at a center part having an enlarged diameter, and an end part which is inserted through the through hole of the first cap nut and has an enlarged diameter. A receiving portion comprising an outer tube having a flare formed therein, a second cap nut having a female thread provided by expanding a front portion of a through hole provided in a central portion, and a peripheral portion having a through hole in a central portion. The sleeve is inserted into the enlarged diameter portion of the second cap nut, and the rear portion of the through hole provided in the central portion is enlarged in diameter to form a tapered portion. An O-ring is attached to the front part of the outer periphery, and the rear part is screwed to female threads of the first cap nut and the second cap nut with the knob part interposed therebetween. A connection member provided with a male screw, and the second cap nut, the sleeve, and the connection member. A telescopic part characterized in that it has a connection part formed by an insertion part consisting of an inner tube fixed to an end and having a retaining member inserted into the through hole and having a through hole and inserted into the outer tube. Spray rod. 2. A cap nut provided with a female screw provided with an enlarged diameter at a rear portion of a through hole provided at a center portion, and a flare formed by inserting a through hole of the cap nut and enlarging an end thereof. A receiving portion formed of an outer tube, a connecting bolt having a front portion of a through hole provided at a center portion having an enlarged diameter, and a male screw provided at an outer peripheral front portion to be screwed with a female screw of the cap nut, and a through portion passing through the center portion. A tapered portion is formed by reducing the diameter on both sides from a substantially central portion of the outer periphery, and is inserted through a sleeve inserted into the enlarged diameter portion of the cap nut, and through holes of the connection bolt and the sleeve. A telescopic spray rod, comprising: a connecting portion having a retaining member inserted into the outer tube and an insertion portion formed of an inner tube fixed to an end.