JP2640732B2 - Telescopic pole - 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 pole.

[0002]

2. Description of the Related Art Conventionally, in a telescopic drying rod having an outer pipe and an inner pipe inserted into the outer pipe so as to be extendable and contractible, a sleeve is fixed to the outer pipe. Used an adhesive.

Further, a stopper portion which comes into contact with the sleeve at the stroke end is provided at the inner end of the inner pipe in order to define the maximum extension of the clothesline.

[0004]

Since the sleeve is fixed to the outer pipe with an adhesive, the strength is unstable, and dirt easily adheres to the inner surface of the sleeve and the outer pipe.

Further, the use of the adhesive deteriorates the workability of attaching the sleeve, and requires a drying time when fixing the sleeve to the outer pipe.

When the inner pipe is pulled out from the outer pipe and is extended, the stopper may impact on the sleeve at the stroke end (the most extended state), so that the sleeve may be detached.

The present invention has been made to eliminate the above-mentioned disadvantages.

[0008]

SUMMARY OF THE INVENTION An outer pipe having an outer pipe having a sleeve fixed at one end and an inner pipe having a stopper at the inner end and being extendably inserted into the outer pipe. A plurality of slits are formed in the longitudinal direction from the inner end side of the pipe insertion inner cylindrical portion of the sleeve, and the pipe insertion of the sleeve is performed at a stroke end where the inner pipe and the outer pipe are in the most extended state. The tapered portion protruding into the inner peripheral surface of the inner cylinder portion is formed in a part of the stopper portion.

Further, the sleeve has a pipe insertion inner tube portion and a pipe outer fitting portion having its outer end continuously connected in a folded shape,
Further, in a telescopic drying rod which is attached by inserting one end of an outer pipe into an annular gap formed by the pipe insertion inner cylinder portion and the pipe outer fitting portion, the pipe insertion inner cylinder portion of the sleeve and the pipe At the position corresponding to the outer fitting portion, a through hole for locking is formed in the pipe insertion inner cylinder portion, and one end of the outer pipe inserted into the annular gap portion projects to the inner surface side by plastic working. The locking projection is formed, and the locking projection is formed in the locking through hole.

[0010]

According to the first aspect of the present invention, at the stroke end, the tapered portion formed in the stopper portion protrudes into the inner peripheral surface of the pipe insertion inner cylindrical portion of the sleeve. Due to this intrusion, the inner end (in which the slit is formed) of the pipe insertion inner cylindrical portion expands. Then, the inner peripheral surface of the expanded pipe insertion inner cylindrical portion is pressed against the inner surface of the outer pipe to generate a large frictional force, and the sleeve and the outer pipe are fixed so as not to be positioned in the axial direction. And the stopper portion withstands the impact force applied to the sleeve.

According to the second aspect, the sleeve is securely locked to the outer pipe by the locking through hole of the inner cylindrical portion of the sleeve into which the pipe is inserted and the locking projection at one end of the outer pipe. Can be. In addition, for assembling, the above-described locking is automatically performed by inserting one end of the outer pipe into the annular gap. In addition, the positions of the locking through hole and the locking projection are in the assembled state.
Since the sleeve is hidden by the outer fitting portion of the pipe, the concave portion or the like of the outer pipe cannot be seen from the outside, thereby increasing the value of the product.

[0012]

Embodiments of the present invention will be described below in detail.

FIG. 1 shows a telescopic drying rod used for hanging laundry, and an outer pipe 2 having a sleeve 1 fixed to one end.
And an inner pipe 4 that is extendably inserted into the outer pipe 2 provided with a stopper 23 at the inner end 16. A cap member 5 made of plastic is attached to the outer end of the outer pipe 2.

The sleeve 1 is, as shown in FIGS. 2 and 6,
It has a pipe insertion inner tube portion 6 and a pipe outer fitting portion 7 whose outer end is continuously provided in a folded shape. An annular gap 13 is formed therebetween.

A plurality of (four in the example shown) slits 8 are formed in the pipe insertion inner cylindrical portion 6 in the longitudinal direction from the inner end side. The material of the sleeve 1 is preferably made of an elastic resin.

FIG. 7 shows the inner cylindrical portion 6 and the pipe outer fitting portion 12.
A state in which one end of the outer pipe 2 is inserted into the annular gap 13 formed by the above. That is, a plurality of locking through holes 14 are formed in the inner cylindrical portion 6 at positions where the pipe insertion inner cylindrical portion 6 of the sleeve 1 and the pipe outer fitting portion 12 correspond.

Further, at one end of the outer pipe 2 inserted into the annular gap 13 is formed a locking projection 15 projecting inward by plastic working. Stopper hole
By locking the sleeve 1 to the sleeve 14, the sleeve 1 can be securely attached to the outer pipe 2.

The inner pipe 4 and the outer pipe 2 are preferably made of stainless steel.

Further, the stopper portion 23 is provided in FIGS.
As shown in FIG. 2, the brake unit 3 is provided also as a part. The brake portion 3 includes a large-diameter portion 9 and a tapered portion 10, and a groove 24 whose depth dimension changes depending on a circumferential position is provided between the large-diameter portion 9 and the tapered portion 10. This groove
A C-shaped stopper piece 11 that can set and fix the inner pipe 4 to an arbitrary length in the outer pipe 2 by rotating the inner pipe 4 in the circumferential direction is fitted in 24.

Further, by rotating the inner pipe 4 in a direction opposite to the above-described rotation, the inner pipe 4 can be moved to be able to expand and contract again.

FIG. 3 shows a state in which the telescopic rod is in the most extended state, and the tapered portion 10 (as the stopper portion 23) is in contact with the pipe insertion inner cylindrical portion 6 of the sleeve 1.
Since a plurality of slits 8... (See FIG. 2) are provided in the pipe insertion inner cylinder portion 6 in the longitudinal direction from the inner end thereof, the taper portion 10 is formed at the stroke end by the pipe insertion inner cylinder portion. 6, the inner cylindrical portion 6 expands, and is pressed against the inner surface of the outer pipe 2.

FIG. 4 is an explanatory view of a virtual state in which the outer pipe 2 has been removed for the sake of understanding. As is apparent from FIG. 4, the inner cylindrical portion 6 of the sleeve 1 enters at the stroke end. The tapered portion 10 of the stopper portion 23 (corresponding to the brake portion 3 in the illustrated example) expands in the outer diameter direction (tulip shape). Actually, since the outer pipe 2 exists as shown in FIG. 3, the outer peripheral surface of the inner cylindrical portion 6 is naturally pressed against the inner peripheral surface of the outer pipe 2.

That is, as shown in FIG.
When the pipe inserts into the inner tube portion 6 with a force P, the force P
Is received by the above-mentioned locking force of the through hole 14 of the sleeve 1 and the projection 15 of the outer pipe 2, but most of the
The frictional (resistance) force μN between the inner cylinder 6 and the outer pipe 2 is received.

More specifically, if most of the force P is indicated by F, the force N generates a force N in a direction perpendicular to the axis of the outer pipe 2, which causes If the friction coefficient between the surface and the inner peripheral surface of the outer pipe 2 is μ, a frictional resistance of μN is generated.

In the above embodiment, the stopper 23
The stopper 23 is shared (also used) with a part of the brake portion 3, but the stopper portion 23 may be formed by a separate member or by bulging the inner pipe 4 itself. In addition, stopper part
23 can have various configurations other than those shown.

[0026]

According to the present invention, the following significant effects can be obtained by the above configuration.

According to the first aspect, it is only necessary to form the slits 8 in the sleeve 1 and to form the tapered portion 10 in the stopper portion 23, so that the structure is simple and simple, and it is easy to manufacture. At the same time, failure is unlikely to occur. In particular, when the tapered portion 10 of the stopper portion 23 protrudes into the inner cylindrical portion 6 of the sleeve 1, the pressing force N (see FIG. 5) of the outer radial direction (radial direction) between the inner cylindrical portion 6 and the outer pipe 2 is increased. As a result, a large frictional resistance μN (see FIG. 5) is generated, so that a brake (braking) is applied at the stroke end, so that the sleeve 1 can be prevented from coming off.

(According to claim 2) Since it is only necessary to form the through hole 14 on the sleeve 1 side and to form the protrusion 15 on the outer pipe 2, a strong and stable without using an adhesive. Strong sleeve fixation can be realized. Further, by omitting the adhesive, the working environment for manufacturing is improved, and the working efficiency is also improved. Furthermore, the plastic processing outer surface concave portion of the locking projection 15 of the outer pipe 2 is hidden by the pipe outer fitting portion 7, so that a product excellent in appearance can be easily manufactured.

[Brief description of the drawings]

FIG. 1 is a half sectional view showing an embodiment of a telescopic drying pole.

FIG. 2 is a perspective view of a sleeve.

FIG. 3 is a half sectional view of a main part.

FIG. 4 is a half sectional view of a principal part for explanation shown in a virtual state.

FIG. 5 is an operation explanatory view.

FIG. 6 is a half sectional view of a sleeve.

FIG. 7 is a half sectional view showing a state where an outer pipe is inserted into a sleeve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sleeve 2 Outer pipe 4 Inner pipe 6 Pipe insertion inner cylinder part 7 Pipe outer fitting part 8 Slit 10 Tapered part 13 Annular gap part 14 Locking through hole 15 Locking protrusion 16 Inner end 23 Stopper part

Claims (2)

(57) [Claims] A telescopic drying apparatus comprising: an outer pipe having a sleeve fixed to one end thereof; and an inner pipe having a stopper portion provided at an inner end and being inserted into the outer pipe so as to be stretchable. In the rod, a plurality of slits 8 are formed in the longitudinal direction from the inner end side of the pipe insertion inner cylindrical portion 6 of the sleeve 1 and the inner pipe 4 and the outer pipe 2 are in the most extended state. At the end, the tapered portion 10 protruding into the inner peripheral surface of the pipe insertion inner cylindrical portion 6 of the sleeve 1 is connected to the stopper portion 23.
A stretchable drying pole characterized by being formed in a part of a. 2. An outer pipe 2 having a sleeve 1 fixed to one end thereof, and an inner pipe 4 provided with a stopper 23 at an inner end 16 and inserted into the outer pipe 2 so as to be extendable and contractible. Has a pipe insertion inner cylindrical portion 6 and a pipe outer fitting portion 7 whose outer end is continuously connected in a folded shape, and an annular gap formed by the pipe inserting inner cylindrical portion 6 and the pipe outer fitting portion 7. In a stretchable clothes rod which is attached by inserting one end of the outer pipe 2 into the portion 13, the pipe insertion inner cylinder is located at a position where the pipe insertion inner cylinder portion 6 of the sleeve 1 and the pipe outer fitting portion 7 correspond. A locking through hole 14 is formed in the portion 6 and the annular gap portion is formed.
A locking projection 15 is formed at one end of the outer pipe 2 to be inserted into the inner pipe 13 by plastic working, and the locking projection 15 is formed in the locking through hole 14. And stretchable drying pole.