JP2001317513A - Pipe connecting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe connecting structure allowing easy connection of a pair of cylindrical pipes to each other axially by simple work and smooth of connecting of them together in a dark place. SOLUTION: In this connecting structure, a pair of cylindrical pipes 11 and 12 are connected together in the axial direction when a male side end part 13 of one cylindrical pipe 11 is inserted into an aperture 17 in a female side end part 16 of the other cylindrical pipe 14 and an engagement projection 18 energized inward in the radial direction is fitted and locked into a projection insertion hole 12 formed in the circumferential face of the male side end part 13. In the engagement projection 18, a guide rib 19 is formed, while on the outer circumferential face of the male side end part 13, a guide groove 20 reaching the projection insertion hole 12 is formed. When the guide rib 34 is locked in the guide groove 20 and slidably moved along the guide groove 20, the engagement projection 18 is guided so as to be fitted and locked in the projection insertion hole 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe connecting structure for integrally connecting a pair of cylindrical pipes in an axial direction and a cleaning tool.

[0002]

2. Description of the Related Art For example, a long rod-shaped member 51 such as a handle of a cleaning tool 50 and a handle of a cane shown in FIG. May be integrally formed in the axial direction. The structure of the connecting portion 53 for connecting and integrating the cylindrical pipes 52 is, for example, a pair of cylindrical pipes 52, 5 to be connected.
Female screw bodies each having a female screw on the inner peripheral surface are attached to the opening at each end, and a pair of these female screw bodies are disposed to face each other, and a male screw body having a male screw on the outer peripheral surface is disposed opposite each other. There is known a structure in which a pair of cylindrical pipes 52, 52 are joined and integrated by screwing into a pair.

According to the structure of the conventional connecting portion 53, a male screw is screwed into a female screw to form a pair of cylindrical pipes 52,
Since the connection of the 52 is performed, it takes time and effort to perform the connection and integration, and the connection work is particularly difficult in a dark place.

SUMMARY OF THE INVENTION The present invention provides a pipe connecting structure and a cleaning method capable of easily connecting and integrating a pair of cylindrical pipes in the axial direction by a simple operation, and performing a smooth connecting operation even in a dark place. The purpose is to provide tools.

[0005]

According to the present invention, the male end of one cylindrical pipe is inserted into the opening of the female end of the other cylindrical pipe and formed on the peripheral surface of the male end. A coupling structure in which a pair of the cylindrical pipes are axially coupled and integrated by fittingly engaging the engagement projection urged radially inward into the projected insertion hole from the female end side. A guide rib is formed on the engagement protrusion, and a guide groove extending from a leading edge to the protrusion insertion hole is formed on an outer peripheral surface of the male side end portion. The above object is attained by providing a pipe connecting structure in which the engaging projection is guided by engaging with the groove and sliding along the guide groove so as to be fitted and locked in the projection insertion hole. It was done.

Further, according to the present invention, a male end of one cylindrical pipe is inserted into an opening of a female end of the other cylindrical pipe, and a projection is formed on a peripheral surface of the female end. A coupling structure for axially coupling and integrating the pair of cylindrical pipes by fitting and engaging engagement projections urged radially outward to the holes from the male end side, A guide rib is formed on the engagement protrusion, and a guide groove extending from a leading edge to the protrusion insertion hole is formed on an inner peripheral surface of the female end, and the guide rib is engaged with the guide groove. The above-mentioned object is achieved by providing a connecting structure of a pipe which stops and slides along the guide groove to guide the engaging projection and fit and lock in the projection inserting hole. is there.

Further, the present invention has achieved the above object by providing a cleaning tool having a handle formed by connecting and integrating cylindrical pipes in the axial direction by the pipe connecting structure.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A pipe connecting structure according to a preferred embodiment of the present invention has a cleaning plate on which a cleaning sheet member for wiping a floor or the like is attached, and an upright standing from the cleaning plate. Of a cleaning tool consisting of a handle provided
This handle is used when a plurality of cylindrical pipes are connected and integrated in the axial direction and provided (see FIG. 5). That is, the cleaning tool is disassembled into parts such as a cleaning plate and a cylindrical pipe for convenience of transportation and sale, and these parts are put together into a product, and these parts are assembled and used at the time of use. I do.

The pipe connecting structure 10 of the present embodiment is employed at a connecting portion of each pair of cylindrical pipes constituting a handle composed of a plurality of cylindrical pipes, as shown in FIGS. The male end 13 having the circular projection insertion hole 12 of one cylindrical pipe 11 is connected to the female end 16 having the circular projection insertion hole 15 of the other cylindrical pipe 14.
By inserting the engaging projections 18 urged radially inward from the outside by engaging the projection insertion holes 12 and 15 with each other and fitting them into the opening 17, the pair of cylindrical pipes 11 and
14 in the axial direction X.

[0010] The engagement projection 18 is provided with the cylindrical pipe 1.
The guide ribs 19 extending in the axial direction X of the cylindrical pipe 11 are formed so as to protrude.
2, a guide groove 20 extending in the axial direction X of the cylindrical pipe 11 is formed. When inserting the male end 13 of one cylindrical pipe 11 into the opening 17 of the other cylindrical pipe 14, the engaging projection 18 is inserted into the projection insertion hole 15 of the other cylindrical pipe 14 from the outside. In a state where the guide rib 19 is inserted and protruded, the guide rib 19 is connected to one of the cylindrical pipes 1.
The first and second guide grooves 20 are engaged with each other, and the guide ribs 19 are slid along the guide grooves 20 toward the protrusion insertion holes 12 so that the engagement protrusions 18 are guided and matched. Is fitted and locked from the male end 13 side (see FIGS. 2A and 2B).

Each of the cylindrical pipes 11 and 14 is a hollow pipe member made of metal (aluminum) having a circular cross section. The male end 13 of one cylindrical pipe 11 is reduced in diameter, and the reduced male end 13 is connected to the opening 17 of the female side 16 of the other cylindrical pipe 14.
And the male end 1 of one cylindrical pipe 11
3 and the female end 16 of the other cylindrical pipe 14 closely overlap each other to form a double-structured connecting portion 21. As a result, the connection strength of the handle is improved as compared with the conventional connection using screws, and rattling at the time of cleaning can be prevented.

The engagement projection 18 is a drum-shaped projection whose base end portion 24 has a circular cross section, and extends radially inward from the inner surface of a synthetic resin sleeve member 22 which is attached to cover the connecting portion 21. It protrudes toward and is formed integrally with the sleeve member 22. In addition, the engagement projection 18
A guide rib 19 having a width slidable while being locked in the guide groove 20 is provided so as to protrude further inward so as to cross the center of the base end portion 24. The guide rib 19 has a tapered surface 23 whose height decreases toward the distal end on the distal end side of the other cylindrical pipe 14. The guide rib 19 and the guide groove 2 at the time of connection are formed by the tapered surface 23.
Since the connection resistance with 0 can be reduced, a smooth connection operation can be performed. The base end portion 24 is also formed with a tapered surface 25 whose height decreases toward the distal end.

A cut 26 is formed in the sleeve member 22 over the entire length of the sleeve member 22 in the axial direction. By expanding the interval between the cuts 26 in the circumferential direction, it is possible to expand the diameter while elastically deforming the sleeve member 22 radially outward, whereby the entire sleeve member 22 is deformed radially outward and radially outward. It becomes an elastic member that generates an urging force inward. Therefore, the sleeve member 2
When the mounting member 2 is attached, it becomes possible to urge the engaging projection 18 formed integrally with the sleeve member 22 radially inward by the elastic force.

The guide groove 20 formed in the one cylindrical pipe 11 is formed into a cylindrical shape by making the outer peripheral surface of the one cylindrical pipe 11 bend in a groove shape at the male end 13 having a reduced diameter. Extending in the axial direction X of the pipe 11,
The cylindrical pipe 11 is formed in a straight line so as to reach the projection insertion hole 12 from the edge of the tip. The guide groove 20 is formed so as to have a shallow rectangular cross section or trapezoidal cross section, and the width of the bottom surface is slightly wider than the width of the guide rib 19 so that the guide rib 19 does not come off from the guide groove 20. , And can be smoothly guided to the projection insertion hole 12 in a stable state.

An annular tapered surface 27 that inclines inward toward the distal end, including the distal end of the guide groove 20, is formed at the peripheral edge of the one end of the cylindrical pipe 11. At the time of connecting the pair of cylindrical pipes 11 and 14 described later, the pair of cylindrical pipes 11 and 14 are relatively moved while the tapered surface 23 of the guide rib 19 opposed to the annular tapered surface 27 abuts. By rotating the guide rib 19, the guide rib 19 can be smoothly guided to the guide groove 20.

In order to connect and integrate the pair of cylindrical pipes 11 and 14 in the axial direction X, first, a sleeve member 22 is mounted so as to cover the outer peripheral surface of the distal end portion of the other cylindrical pipe 14, and the engagement is performed. The projection 18 is inserted into the projection insertion hole 15 of the other cylindrical pipe 14, and the inner part of the engagement projection 18 including the guide rib 19 is projected from the inner surface of the other cylindrical pipe 14. Here, the inside diameter of the sleeve member 22 is slightly smaller than the outside diameter of the other cylindrical pipe 14, and the interval between the cuts 26 is increased in the circumferential direction, and the sleeve member 22 is elastically deformed so as to increase the diameter. It is mounted on the outer peripheral surface of the other cylindrical pipe 14. Thereby, the engagement protrusion 1
8 is urged radially inward and has a tapered surface 2
In a state where 3, 25 is directed toward the distal end side of the other cylindrical pipe 14, it projects from the inner surface of the cylindrical pipe 14 (FIG. 1).
reference).

Next, the reduced-diameter male end 13 of one cylindrical pipe 11 is connected to the opening 17 of the female end 16 of the other cylindrical pipe 14 through the inner hollow portion of the sleeve member 22. Insert By such an insertion operation, the peripheral edge of the tip of one cylindrical pipe 11 is, for example, formed on the annular tapered surface 27 where the guide groove 20 is not formed.
Guide rib 1 protruding inside the other cylindrical pipe 14
9 (see the broken line in FIG. 3). And
While maintaining the contact force in the insertion direction along the axial direction X, one cylindrical pipe 11 is connected to the other cylindrical pipe 14.
When the guide rib 19 is relatively rotated with respect to the guide groove 19, the guide rib 19 reaches the portion of the annular tapered surface 27 where the guide groove 20 is formed. (See solid line in FIG. 3). Thereby, the position of the guide groove 20 can be easily and clearly identified by the feel of the hand holding the contact force, and the guide rib 1
9 is accurately and reliably positioned so that it can slide along the guide groove 20.

Thereafter, the male-side end 13 of the cylindrical pipe 11 whose diameter is reduced is further inserted into the opening 17 of the other cylindrical pipe 14, and the guide rib 19 of the engaging projection 18 becomes The sleeve member 22 rides on the guide groove 20 while being elastically deformed, and slides smoothly along the guide groove 20 toward the projection insertion hole 12 (see FIG. 2A). The engagement projection 18 is provided in the projection insertion hole 12.
, The sleeve member 22 drops into the projection insertion hole 12 from the female end 16 side by the radially inward elastic biasing force of the sleeve member 22, and the projection insertion holes 12 and 15 are fitted and locked with the projection insertion holes 12 and 15 aligned. . Thereby, the pair of cylindrical pipes 11,
14 has a strong connecting portion 21 having a double structure in which the male end portions 13 and 16 are closely overlapped.

That is, according to the present embodiment, the pair of cylindrical pipes 11 and 14 can be easily connected and integrated in the axial direction by a simple operation, and the guide rib 19 can be inserted into the guide groove 20 by the touch of the hand. The pair of cylindrical pipes 11 and 14 can be easily connected in a dark place by performing smooth alignment.

Further, according to the present embodiment, the connecting portion 21
Has a double structure in which the end 13 of one cylindrical pipe 11 and the female end 16 of the other cylindrical pipe 14 are closely arranged with a considerable length (25 mm in the present embodiment). Even when a large bending stress is applied to the connecting portion 21 when the cleaning tool is used, the bending stress can be sufficiently supported by the wrap portion of the double structure, and the connecting portion 21 may be loosened or damaged. Can be effectively avoided. In particular, since the cylindrical pipes 11 and 14 are metal pipe members, they can exhibit a stronger supporting force against bending stress.

FIGS. 4A and 4B show another embodiment of the present invention. According to this embodiment, the diameter of the male end 13 of one cylindrical pipe 11 is reduced. Is urged radially outward by an elastic member 30 such as a leaf spring disposed inside the male-side male-side end portion 13. The entirety of the pipe 11 is provided as a guide rib 34 so as to protrude from the inside to the outside of one of the cylindrical pipes 11 through a rectangular projection insertion hole 32 formed in the male end 13 of the pipe 11. Note that the engagement protrusion 31 is
The substrate plate 33 is provided with a protrusion insertion hole 3 on the inner surface of the cylindrical pipe 11.
By contacting the periphery of the second member 2, the protrusion amount of the engagement protrusion 31 due to the urging force of the elastic member 30 is regulated. The guide rib 34 has a width which can be slid while being locked in the guide groove 35 of the female end 16, and the guide rib 34 has a height toward the distal end of the cylindrical pipe 11 toward the distal end. A tapered surface 35 having a reduced height is formed.

The female end 16 of the other cylindrical pipe 14
A guide groove 35 extending linearly in the axial direction X so as to reach a rectangular-shaped projection insertion hole 36 from a front end edge thereof.
Is formed by depressing the inner surface of the other cylindrical pipe 11 into a band shape. The guide groove 3
The width of 5 is slightly larger than the width of the guide rib 34, so that the guide rib 34 can be smoothly guided to the projection insertion hole 36 in a stable state. An annular tapered surface 37 that slopes outward toward the distal end, including the distal end of the guide groove 35, is formed on the peripheral edge of the other cylindrical pipe 14.

According to this embodiment, the engagement projection 31 is
A male-side end of one cylindrical pipe 11 whose diameter is reduced is biased radially outward by an elastic member 30 and is mounted in advance in a projection insertion hole 32 of one cylindrical pipe 11 from the inside. By directly inserting 13 into the opening 17 at the end 16 of the other cylindrical pipe 14, the pair of cylindrical pipes 11 and 14 can be easily connected and integrated. That is, in such an insertion operation, the guide rib 3
4 is brought into contact with an annular tapered surface 37 at the peripheral edge of the other cylindrical pipe 14, and then one cylindrical pipe 11 is rotated relative to the other cylindrical pipe 14. For example, the tapered surface 35 of the guide rib 34 falls into the annular tapered surface 37 of the guide groove 35 and is easily positioned in the guide groove 35.

Thereafter, when the male end 13 of one cylindrical pipe 11 is further inserted into the opening 17 of the other cylindrical pipe 14, the guide rib 34 is
5, slides smoothly toward the projection insertion hole 36 and reaches the projection insertion hole 12, and falls outward from the male end 13 toward the projection insertion hole 12 by elastic biasing force. As a result, the engagement projection 31 is fitted and locked with the projection insertion holes 12 and 15 aligned with each other, and the pair of cylindrical pipes 11 and 14 are firmly connected and integrated. According to this embodiment, the same operation and effect as those of the above-described embodiment can be obtained.

The present invention can be variously modified without being limited to the above embodiments. For example, it is not always necessary to provide a tapered surface on the distal end side of the guide rib, and only the peripheral edge of the cylindrical pipe is tapered. It is also possible not to form them. Also, only the tip side of the guide rib may be a tapered surface. Further, the present invention is not limited to the handle of the cleaning tool, and is adopted as a connecting structure of cylindrical pipes in various long rod-shaped members formed by connecting and integrating a plurality of cylindrical pipes in the axial direction. You can also. Furthermore, the engagement projection is not necessarily required to be a separate member from the pair of cylindrical pipes, and is provided integrally with the male end or the female end while being able to advance and retreat in the radial direction from the peripheral surface of the end. You can also.

[0026]

According to the pipe connecting structure and the cleaning tool of the present invention, a pair of cylindrical pipes can be easily connected and integrated in the axial direction by a simple operation, and can be connected smoothly even in a dark place. Work can be done.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view illustrating a pipe connection structure according to an embodiment of the present invention.

FIGS. 2A and 2B are partially cutaway cross-sectional views illustrating a pipe connection structure according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a main part illustrating a positioning situation in a pipe connection structure according to an embodiment of the present invention.

4 (a) is a sectional view and FIG. 4 (b) is an enlarged perspective view of a main part, illustrating a pipe connecting structure according to another embodiment of the present invention.

FIG. 5 is a perspective view showing a cleaning tool provided with a conventional pipe connection structure.

[Explanation of symbols]

 Reference Signs List 10 Pipe connection structure 11 One cylindrical pipe 12 Projection insertion hole (projection insertion hole of one cylindrical pipe) 13 Male end 14 Other cylindrical pipe 15 Projection insertion hole (projection insertion of other cylindrical pipe Hole) 16 Female end 17 Opening 18 Engagement projection 19 Guide rib 20 Guide groove 21 Connecting portion 22 Sleeve member 23 Tapered surface (taper surface of guide rib) 26 Cut 24 Second cut 27 Annular taper surface 30 Elastic member 31 Engagement Projection 32 Projection insertion hole 34 Guide rib 35 Tapered surface 36 Projection insertion hole 37 Annular taper surface

Claims (5)

[Claims] 1. A male-side end of one cylindrical pipe is inserted into an opening of a female-side end of the other cylindrical pipe, and a radial direction is inserted into a projection insertion hole formed on a peripheral surface of the male-side end. A coupling structure in which a pair of the cylindrical pipes are axially connected and integrated by fitting and locking an engagement projection urged inward from the female side end side, wherein the engagement projection is A guide rib is formed on an outer peripheral surface of the male side end, and a guide groove extending from a leading edge to the protrusion insertion hole is formed. The guide rib is locked in the guide groove, and the guide rib is formed. A pipe connecting structure for guiding the engaging projections and slidingly engaging the projection insertion holes by sliding along the grooves. 2. A male-side end of one cylindrical pipe is inserted into an opening of a female-side end of the other cylindrical pipe, and a radial direction is inserted into a protrusion insertion hole formed on a peripheral surface of the female-side end. A coupling structure in which a pair of the cylindrical pipes is axially connected and integrated by fitting and locking an outwardly urged engagement projection from the male end side, wherein the engagement projection is A guide rib is formed on the inner peripheral surface of the scalpel-side end, and a guide groove extending from a leading edge to the protrusion insertion hole is formed.The guide rib is locked in the guide groove. A pipe connecting structure for guiding the engaging projections and slidingly engaging the projection insertion holes by sliding along the guide grooves. 3. A projection insertion hole formed at a male end of said one cylindrical pipe and a projection insertion hole formed at a female end of said other cylindrical pipe are matched with each other. The pipe connection structure according to claim 1, wherein the engagement projection urged radially inward or outward from the outside or inside of the matched projection insertion hole is fitted and locked. 4. A leading edge of the male rib or a distal edge of the female end is formed at a leading end of the guide rib in a sliding direction with a height decreasing in a sliding direction. The pipe connecting structure according to any one of claims 1 to 3, wherein an annular tapered surface facing the tapered surface is formed on the pipe. 5. A cleaning tool having a handle formed by connecting and integrating cylindrical pipes in the axial direction by the pipe connection structure according to claim 1. Description: