JP2013085604A - Pipe connection structure and cleaning tool using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow easy pipe connection, and to improve pulling-out strength, in regard to a pipe connection structure and a cleaning tool using the same.SOLUTION: In this pipe connection structure, a male pipe 100 and a female pipe (e.g., a grip 70) are connected in the axial direction by inserting the tubular male pipe 100 into the tubular female pipe (e.g., the grip 70). One of the male pipe 100 and the female pipe (e.g., the grip 70) has a projection part 101, the other has a fitting hole 72, and the male pipe 100 and the female pipe (e.g., the grip 70) are connected by fitting the projection part 101 into the fitting hole 72. The peripheral face of one of the male pipe 100 and the female pipe (e.g., the grip 70) has projecting parts 102 deforming the male pipe 100 inward when inserting the male pipe 100 into the female pipe (e.g., the grip 70).

Description

  The present invention relates to a pipe connection structure and a cleaning tool using the pipe connection structure, and enables the pipes to be easily connected to each other and to improve the pull-out strength.

2. Description of the Related Art Conventionally, there has been known a cleaning tool handle that can connect cylindrical pipes by inserting an insertion end of one cylindrical pipe into an external insertion end of the other cylindrical pipe (Patent Document 1). Paragraph number “0012” of FIGS. 1 to 3).
Protrusion engagement holes are respectively formed on the peripheral surfaces of the inner insertion end portion and the outer insertion end portion (see paragraph number “0012” in FIGS. 1 to 3 of Patent Document 1).

A substantially U-shaped spring piece having an engagement protrusion is provided inside the insertion end portion with the engagement protrusion protruding from the protrusion engagement hole (paragraph number in Patent Document 1). “0013”, see FIG.
When the inner insertion end is inserted into the outer insertion end, the engagement protrusion is pushed against the spring force of the spring piece, and when the insertion protrusion is pushed to the position of the protrusion engagement hole of the outer insertion end, the spring of the spring piece Due to the force, the engaging protrusion fits into the protrusion engaging hole of the extrapolated end (see paragraph number “0013” of FIGS. 3 (b) and 3 (c)).

JP 2006-314363 A

However, in the conventional cleaning tool handle described above, the engaging protrusion is elastically protruded by the spring piece, so that the insertion force can be reduced, but there is a problem that the pulling strength is reduced.
That is, in the conventional cleaning tool handle, it is necessary to increase the spring force of the spring piece in order to improve the pull-out strength. However, if the spring force is increased, the insertion force increases.

In addition, with a conventional cleaning tool handle, if the spring force is increased, the engagement protrusion hits the opening edge of the external insertion end or the protrusion engagement hole during insertion, and the damage is caused by scraping. There is a drawback in that pulling strength is reduced when the engaging protrusion is broken.
In addition to this, the conventional cleaning tool handle has a structure in which the engaging protrusion is elastically protruded by the spring piece, so that the connection structure of the pipe is complicated, the number of parts is large, and the manufacturing is difficult. There was also.

Accordingly, each invention described in each claim has been made in view of the problems of the conventional techniques described above, and the object thereof is as follows.
(Claim 1)
The object of the present invention is as follows.
In other words, the invention described in claim 1 makes it possible to easily connect the pipes and to improve the pull-out strength.

That is, according to the first aspect of the present invention, when the male pipe is inserted into the female pipe, the male pipe is deformed inward by the convex portion, so that the protrusion is fitted in the fitting hole. It can be made to project and it can be made difficult to remove a projection part from a fitting hole.
(Claim 2)
The second aspect of the invention has the following object in addition to the object of the first aspect of the invention.

That is, the invention according to claim 2 has a slit along the longitudinal direction on both sides of the peripheral surface of the male pipe sandwiching the protrusion, so that the protrusion of the male pipe can be easily bent, resulting in an insertion force. It can be reduced.
In addition, according to the invention described in claim 2, by making the protrusion of the male pipe easy to bend, it is possible to prevent the protrusion from being damaged due to shaving or the like.
(Claim 3)
The invention described in claim 3 has the following object in addition to the object of the invention described in claim 1 or claim 2.

That is, in the invention according to claim 3, by making the cross section of at least a part of the outer peripheral portion of the male pipe corrugated, the protrusion of the male pipe can be easily bent, and as a result, the insertion force can be reduced. It is what I did.
In addition, according to the invention described in claim 2, by making the protrusion of the male pipe easy to bend, it is possible to prevent the protrusion from being damaged due to shaving or the like.
(Claim 4)
The invention according to claim 4 has the following object in addition to the object of the invention according to any one of claims 1 to 3.

That is, the invention according to claim 4 has a protrusion on the inner peripheral surface of the female pipe that can be fitted into the corrugated shape of the outer peripheral portion of the male pipe. This prevents rotation of the male pipe and prevents rotation of the male pipe.
In addition, according to the invention described in claim 4, since the wave shape of the male pipe is inserted in a state of fitting to the ridge portion of the female pipe, the ridge portion has a function as a guide at the time of insertion. Can be made.
(Claim 5)
The invention described in claim 5 has the following object in addition to the object of the invention described in any one of claims 1 to 4.

  That is, the invention according to claim 5 can provide a pipe connection structure suitable for a handle of a cleaning tool.

Each invention described in each claim has been made to achieve each of the above-mentioned objects, and features of each invention will be described below using embodiments of the invention shown in the drawings. .
In addition, the code | symbol in parenthesis shows the code | symbol used in embodiment of invention, and does not limit the technical scope of this invention.
Also, the drawing numbers indicate the drawing numbers used in the embodiments of the invention and do not limit the technical scope of the present invention.
(Claim 1)
The invention described in claim 1 is characterized by the following points.

First, as shown in FIGS. 1 to 5, for example, a male pipe (100) and a female pipe (for example, a grip) are inserted by inserting a cylindrical male pipe (100) into a cylindrical female pipe (for example, a grip 70). 70) is a connecting structure of pipes that connects in the axial direction.
Second, as shown in FIGS. 1, 3 and 5, for example, one of the male pipe (100) and the female pipe (eg grip 70) has a protrusion (101), and the other has a fitting hole. The male pipe (100) and the female pipe (for example, the grip 70) are connected by fitting the protrusion (101) into the fitting hole (72).

In the present embodiment, the protrusion (101) is provided on the outer periphery of the male pipe (100), and the fitting hole (72) is provided on the female pipe (for example, the grip 70). Although not shown, a protrusion may be provided on the inner periphery of the female pipe (eg, grip 70), and a fitting hole into which the protrusion is fitted may be provided in the male pipe (100).
Thirdly, as shown in FIGS. 1 and 3, for example, the male pipe (100) is connected to the female pipe (eg, grip 70) on the peripheral surface of either the male pipe (100) or the female pipe (eg, grip 70). And a convex portion (102) for deforming the male pipe (100) inward when inserted into the pipe.

In the present embodiment, the convex portion (102) is provided on the outer periphery of the male pipe (100). However, the present invention is not limited thereto, and although not illustrated, the convex portion is provided on the inner periphery of the female pipe (for example, the grip 70). May be provided.
(Claim 2)
The invention described in claim 2 is characterized by the following points in addition to the characteristics of the invention described in claim 1 described above.

That is, on both sides of the peripheral surface of the male pipe (100) with the protrusion (101) sandwiched, for example, as shown in FIGS. 1 and 3, there are slits (103) along the longitudinal direction.
(Claim 3)
The invention described in claim 3 is characterized by the following points in addition to the characteristics of the invention described in claim 1 or claim 2 described above.

That is, for example, as shown in FIG. 1, at least a part of the outer peripheral portion of the male pipe (100) has a corrugated shape (104).
(Claim 4)
The invention described in claim 4 is characterized by the following points in addition to the features of the invention described in any one of claims 1-3.

That is, it is possible to fit on the inner peripheral surface of the female pipe (for example, grip 70) to the corrugated shape (104) of the outer peripheral portion of the male pipe (100) as shown in FIGS. Has a ridge (73).
(Claim 5)
Invention of Claim 5 is a cleaning tool, Comprising: In addition to the characteristic point of invention of any one of above-mentioned Claims 1-4, it is characterized by the following point.

  That is, for example, as shown in FIG. 2, the cleaning tool (10) has a handle (50) formed by connecting pipes by a pipe structure.

Since this invention is comprised as mentioned above, there exists an effect as described below. (Claim 1)
According to invention of Claim 1, there exist the following effects.
That is, according to the first aspect of the present invention, the pipes can be easily connected to each other, and the pull-out strength can be improved.

That is, according to the first aspect of the present invention, when the male pipe is inserted into the female pipe, the male pipe is deformed inward by the convex portion, so that the protrusion is fitted in the fitting hole. It can be made to project and it can be made difficult to remove a projection part from a fitting hole.
(Claim 2)
According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the following effect is obtained.

That is, according to the second aspect of the present invention, the protrusions of the male pipe can be easily bent by inserting slits along the longitudinal direction on both sides of the peripheral surface of the male pipe with the protrusions interposed therebetween. The force can be reduced.
In addition, according to the invention described in claim 2, by making the protrusion of the male pipe easy to bend, it is possible to prevent the protrusion from being damaged due to shaving or the like.
(Claim 3)
According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the following effect is obtained.

That is, according to the invention described in claim 3, by making the cross section of at least a part of the outer peripheral portion of the male pipe into a corrugated shape, the protruding portion of the male pipe can be easily bent, and as a result, the insertion force is reduced. Can do.
In addition, according to the invention described in claim 2, by making the protrusion of the male pipe easy to bend, it is possible to prevent the protrusion from being damaged due to shaving or the like.
(Claim 4)
According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1-3, the following effect is provided.

That is, according to the invention described in claim 4, the male pipe in the female pipe is provided on the inner peripheral surface of the female pipe by having the protruding portion that can fit into the wave shape of the outer peripheral part of the male pipe. The pipe is prevented from rotating, and the male pipe can be prevented from rotating.
In addition, according to the invention described in claim 4, since the wave shape of the male pipe is inserted in a state of fitting to the ridge portion of the female pipe, the ridge portion has a function as a guide at the time of insertion. Can be made.
(Claim 5)
According to the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1-4, the following effect is provided.

  That is, according to the invention described in claim 5, it is possible to provide a pipe connection structure suitable for the handle of the cleaning tool.

It is a partially exploded perspective view of a grip and a cap. It is a perspective view of a cleaning tool. It is another partial exploded perspective view of a grip and a cap. It is a disassembled perspective view with the cap which made a part of grip a cross section. It is a partial perspective view of the state which connected the grip and the cap. It is a front view of a grip. It is a top view of a grip. It is a bottom view of a grip. It is a left view of a grip. It is a right view of a grip. It is sectional drawing which follows the AA line of FIG. It is an enlarged view of the B section of FIG. It is sectional drawing which follows the CC line of FIG. It is sectional drawing which follows the DD line | wire of FIG. It is sectional drawing which follows the EE line | wire of FIG. It is a perspective view of a cap. It is a front view of a cap. It is a top view of a cap. It is a bottom view of a cap. It is a left view of a cap. It is a right view of a cap. It is sectional drawing which follows the FF line | wire of FIG. It is sectional drawing which follows the GG line of FIG. It is a front view of an assembly state. It is a left view of an assembly state. It is sectional drawing which follows the HH line of FIG. It is sectional drawing which follows the II line | wire of FIG. It is sectional drawing which follows the JJ line of FIG. It is an enlarged view of the K section in FIG.

(Cleaning tool 10)
In FIG. 2, reference numeral 10 denotes a cleaning tool, and the pipe connection structure according to the present invention is used to connect pipes constituting a handle 50 described later of the cleaning tool 10.
As shown in FIG. 2, the cleaning tool 10 is roughly composed of the following parts.
The parts of the cleaning tool 10 are not limited to the following (1) to (4).

(1) Cleaning sheet 20
As shown in FIG. 2, the cleaning sheet 20 is attached to a head unit 30 described later and can be replaced.
(2) Head part 30
As shown in FIG. 2, the head unit 30 can be mounted with a cleaning sheet 20.

(3) Free joint 40
As shown in FIG. 2, the free joint 40 is located between the head portion 30 and a handle 50 described later, and allows the handle 50 to freely move in the front-rear direction and the left-right direction.
(4) Pattern 50
As shown in FIG. 2, the handle 50 is connected to the head portion 30 via a free joint 40. (Pattern 50)
As shown in FIG. 2, the handle 50 includes the following parts when roughly classified.

(1) Shaft 60
As shown in FIG. 2, the shaft 60 is formed in a rod shape, and a lower end portion is connected to the head portion 30 via a free joint 40. Although not shown, the shaft 60 is constituted by connecting a plurality of pipes so as to be expandable and contractible, and includes a length adjusting mechanism.
(2) Grip 70 (female pipe)
As shown in FIGS. 1 to 5, the grip 70 is connected to the upper end of the shaft 60 and is formed in a cylindrical shape to constitute a female pipe.

Further, the grip 70 is formed so as to become gradually thinner toward the shaft 60.
(3) Cap 80 (male pipe 100))
As shown in FIGS. 1 to 5, the cap 80 is inserted into an opening 71 described later of the grip 70 and closes the opening 71. As will be described later, the cap 80 has a male pipe 100 that can be inserted into the opening 71 of the grip 70 constituting the female pipe.
(Grip 70 (female pipe))
In the grip 70, the female pipe portion is integrally formed of a thermoplastic resin having an appropriate rigidity, for example, polypropylene (PP).

The resin of the grip 70 is not limited to polypropylene (PP).
As shown in FIGS. 6 to 15, the grip 70 is roughly divided into the following parts.
The following (1) to (3) will be described later.
(1) Opening 71
(2) Fitting hole 72
(3) ridge 73
In addition, each part of the grip 70 is not limited to the above (1) to (3).
(Opening 71)
As shown in FIGS. 1, 3, and 4, the opening 71 is positioned at one end of the grip 70 and is used to insert a male pipe 100, which will be described later, of the cap 80. The opening 71 is inclined obliquely so as to incline downward toward the tip.
(Mating hole 72)
As shown in FIGS. 1, 3 to 5, 12, and 29, the fitting hole 72 is a protrusion of the male pipe 100 that is also described later when the male pipe 100 described later of the cap 80 is inserted into the opening 71. The portion 101 is for fitting. As shown in FIG. 12, the fitting hole 72 penetrates into and out of the grip 70 and is formed in a substantially rectangular shape extending long in the insertion direction of the male pipe 100 as shown in FIG. Further, the distal end portion of the male pipe 100 in the insertion direction, that is, the distal end portion of the fitting hole 72 is formed in a semicircular shape so as to be adapted to the outer shape of a projection 101 described later of the male pipe 100.

In addition, although the fitting hole 72 was formed in the substantially rectangular shape, it is not limited to this.
Further, as shown in FIGS. 1, 3, 8, and 12, a recess 72 a that is recessed from the outer peripheral surface of the grip 70 is provided around the fitting hole 72.
(Projection 73)
As shown in FIGS. 1, 3, and 4, the protrusion 73 can be fitted into a wave shape 104 described later on the outer peripheral portion of the male pipe 100. As shown in FIG. 10, a plurality of protrusions 73 project from the inner periphery of the grip 70 toward the center, and are formed in a rib shape extending long in the insertion direction of the male pipe 100 as shown in FIG. .

The protrusion 73 is configured to be fitted in the recessed valley portion of the corrugated shape 104 of the male pipe 100 and to be relatively slidable in the insertion direction of the male pipe 100 while being fitted in the valley portion.
(Cap 80 (100 male pipe))
The cap 80 is two-color molded, and after a male pipe 100 to be described later is primarily molded, the male pipe 100 is inserted and a cap body 90 to be described later is secondarily molded. The male pipe 100 is integrally formed of polypropylene (PP) in the same manner as a thermoplastic resin having appropriate elasticity and rigidity, for example, the grip 70. The cap body 90 is integrally formed of a thermoplastic resin rich in elasticity, for example, a thermoplastic elastomer (TPE).

The resin of the male pipe 100 is not limited to polypropylene (PP), and the resin of the cap 80 is not limited to thermoplastic elastomer (TPE).
As shown in FIGS. 16 to 23, the cap 80 is roughly divided into the following parts.
The following (1) and (2) will be described later.
(1) Cap body 90
(2) Male pipe 100
In addition, each part of the cap 80 is not limited to the above (1) and (2).
(Cap body 90)
As shown in FIGS. 1, 3, and 4, the cap body 90 is located at one end of the cap 80 and has an outer diameter larger than the inner diameter of the opening 71 of the grip 70. For this reason, in a state where a male pipe 100 described later is inserted into and attached to the opening 71 of the grip 70, the opening 71 can be closed by the cap body 90 as shown in FIG.

Further, as shown in FIGS. 1, 3, and 4, the tip of the cap 80 is inclined obliquely so as to incline downward toward the tip.
As shown in FIGS. 16 to 23, the cap body 90 includes the following parts.
In addition, each part of the cap main body 90 is not limited to following (1).
(1) Mounting hole 91
Although not shown, the mounting hole 91 is for hooking on a hook or attaching through a string. As shown in FIGS. 1, 3, 4 and 22, the mounting hole 91 is formed at an obliquely inclined end portion of the cap 80. It is located and penetrates in a substantially elliptical shape in the thickness direction.

In addition, although the attachment hole 91 was formed in the substantially elliptical shape, it is not limited to this, You may form in circular shape or a polygonal shape.
(Male pipe 100)
As shown in FIGS. 1, 3, and 4, the male pipe 100 is located at one end of the cap 80, and its outer diameter is equal to or smaller than the inner diameter of the opening 71 of the grip 70, which is substantially equal to the inner diameter in this embodiment. Forming.

Further, the male pipe 100 is formed in a tapered shape toward the distal end portion in the insertion direction, thereby improving the insertability.
The male pipe 100 includes the following parts as shown in FIGS.
The following (1) to (4) will be described later.
(1) Projection 101
(2) Convex part 102
(3) Slit 103
(4) Wave shape 104
In addition, each part of the male pipe 100 is not limited to the above (1) to (4).
(Protrusion 101)
As shown in FIGS. 1, 3, and 29, the protruding portion 101 protrudes from the outer periphery of the male pipe 100 and can be fitted into the fitting hole 72 of the grip 70.

The protrusion 101 is formed in a rib shape extending long in the insertion direction, and its flat surface is formed in a substantially rectangular shape adapted to the fitting hole 72. Further, the tip of the protrusion 101, which is located on the front side in the insertion direction of the male pipe 100, is formed in a semicircular plane so that it can easily fit into the fitting hole 72.
In addition, although the projection part 101 was formed in the substantially rectangular shape, it is not limited to this, What is necessary is just to stand up the rear-end part of the insertion direction.
(Convex part 102)
As shown in FIGS. 1, 3, and 4, the convex portion 102 protrudes from the outer periphery of the male pipe 100, and deforms the male pipe 100 inward when the male pipe 100 is inserted into the opening 71 of the grip 70. Is.

As shown in FIG. 20, a pair of convex portions 102 are located at both ends in the diametrical direction including the protruding portion 101 and the diametrical direction orthogonal to the center of the circle of the male pipe 100, and Projects to a large diameter. The convex portion 102 extends in the insertion direction from the end surface of the male pipe 100 and has a length substantially equal to that of the protruding portion 101.
(Slit 103)
As shown in FIGS. 1, 3, 4 and 19, the slits 103 are located on both sides of the peripheral surface of the male pipe 100 with the protrusion 101 interposed therebetween, and extend along the longitudinal direction.

The slit 103 is located adjacent to both sides of the protrusion 101, and is positioned behind the male pipe 100 in the insertion direction, from the rear end of the protrusion 101 toward the rear in the insertion direction, along the insertion direction. It extends for a long time.
Although a pair of slits 103 is formed, the present invention is not limited to this, and three or more slits 103 may be formed.
(Wave shape 104)
As shown in FIGS. 1, 16, and 20, the wave shape 104 is a cross-sectional shape of at least a part of the outer peripheral portion of the male pipe 100.

The wave shape 104 is formed over substantially the entire length of the male pipe 100.
The ridge 73 protruding from the inner peripheral surface of the opening 71 of the grip 70 is fitted into the recessed valley portion of the wave shape 104, and the male pipe 100 is opened in the state where the ridge 73 is fitted. Proceed toward the back.
The insertion position of the male pipe 100 with respect to the opening 71 of the grip 70 is regulated by the concave valley portion of the wave shape 104 and the protrusion 73.
(How to connect grip 70 and cap 80)
A method for connecting the grip 70 and the cap 80 having the above-described configuration will be described.

The male pipe 100 of the cap 80 is inserted in alignment with the opening 71 of the grip 70.
At this time, the protruding portion 73 protruding from the inner peripheral surface of the opening 71 is inserted into the valley portion of the wave shape 104 of the male pipe 100 so as to fit.
When the male pipe 100 is inserted, the protrusion 101 having the largest protrusion amount from the outer periphery thereof is pushed by the inner peripheral surface of the opening 71, and the entire male pipe 100 is bent flat.

Referring to FIG. 20 as an example, since the protrusion 101 is positioned on the lower side in the drawing, the entire male pipe 100 is bent flat so as to be crushed in the vertical direction.
At this time, since the pair of slits 103 are positioned on both sides of the protrusion 101, the periphery of the protrusion 101 is greatly bent toward the hollow inner side.
Thereafter, the male pipe 100 as a whole is bent flat and proceeds toward the back of the opening 71.When the protrusion 101 of the male pipe 100 advances to the position of the fitting hole 72 of the grip 70, the resin Due to the elastic restoring force, the protrusion 101 fits into the fitting hole 72 as shown in FIG.

Therefore, the male pipe 100 cannot be removed from the opening 71 of the grip 70, and the opening 71 is blocked by the cap body 90.
On the other hand, at the position where the protruding portion 101 is fitted in the fitting hole 72, the pair of convex portions 102 protruding from the outer periphery of the male pipe 100 is pushed by the inner peripheral surface of the opening 71 of the grip 70, so that the male pipe 100 The whole bends flat.

Referring to FIG. 20 as an example, since the pair of convex portions 102 are located on the left and right sides in the drawing, the entire male pipe 100 is bent flat so as to be crushed in the left-right direction.
For this reason, the protrusion 101 is urged outward in the radial direction, and tries to fit deeply into the fitting hole 72.
Therefore, the pulling strength of the male pipe 100 can be improved by urging the protrusion 101 in a direction in which the fitting hole 72 is to be deeply inserted.

10 Cleaning tool 20 Cleaning sheet
30 Head 40 Free joint
50 handle 60 shaft
70 Grip (female pipe) 71 Opening
72 Mating hole 72a Recess
73 ridge 80 cap
90 Cap body 91 Mounting hole
100 male pipe
101 Projection 102 Projection
103 Slit 104 Wave shape

Claims (5)

A pipe connection structure that connects the male pipe and the female pipe in the axial direction by inserting a cylindrical male pipe into the cylindrical female pipe,
Either the male pipe or the female pipe has a protrusion, the other has a fitting hole, and by fitting the protrusion into the fitting hole, the male pipe and the female pipe are connected,
A pipe connection structure, characterized in that, on one peripheral surface of either the male pipe or the female pipe, there is a convex portion that deforms the male pipe inward when the male pipe is inserted into the female pipe.   The pipe connection structure according to claim 1, further comprising slits along a longitudinal direction on both sides of the peripheral surface of the male pipe sandwiching the protrusion.   The pipe connection structure according to claim 1 or 2, wherein a cross section of at least a part of an outer peripheral portion of the male pipe has a wave shape.   The pipe according to any one of claims 1 to 3, wherein the female pipe has a protruding portion capable of fitting into a wave shape of the outer peripheral portion of the male pipe on an inner peripheral surface of the female pipe. Connection structure.   A cleaning tool having a handle formed by connecting pipes by the pipe structure according to claim 1.

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