JP5295282B2 - Pipe connection structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe connection structure, wherein respective pairs of cylindrical pipes constituting a handle can be further smoothly connected. <P>SOLUTION: In the connection structure 10 of respective pairs of cylindrical pipes, a male side end 17a is inserted into a female side end 17b, a male side protrusion insertion hole 18a and a female side protrusion insertion hole 18b are matched to lock an engagement protrusion 19, and a sleeve-shaped member 21 covering a joint 20 is attached thereto, the sleeve-shaped member 21 is provided with a contact rib 22 circumferentially, continuously or intermittently which is protruded inside from the inner circumferential surface of a part covering a joint 20, and the contact rib 22 is provided with an insertion guide slope 23 circumferentially and continuously or intermittently which is extended and sloped to the radial outside toward the head side of the sleeve-shaped member 21. To the female side end 17b of the other cylindrical pipe 11b, the male side end 17a of the one cylindrical pipe 11a is inserted with the sleeve-shaped member 21 mounted thereon. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a pipe connection structure and a cleaning tool for connecting and integrating a pair of cylindrical pipes in the axial direction.

  For example, as a cleaning tool for cleaning a floor surface, a cleaning tool is known that includes a cleaning head to which a mop, a cleaning sheet, and the like are attached, and a handle that is rotatably connected to the cleaning head via a joint portion. In general, these cleaning tools not only rotate the handle vertically with respect to the cleaning head, but also allow the handle to rotate 360 degrees in the circumferential direction around the joint. Thus, the floor surface or the like can be efficiently cleaned while the cleaning surface of the cleaning head is directed in an arbitrary direction (see, for example, Patent Document 1).

  Also, as a handle for such a cleaning tool, insert the male end of one cylindrical pipe into the female end of the other cylindrical pipe and match the male protrusion insertion hole with the female protrusion insertion hole. A plurality of cylindrical shapes are formed by a pipe connection structure configured to lock the engagement protrusion from the outside and cover the joint portion between the male end and the female end from the outside and attach a sleeve-like member. A pipe that is connected and integrated in the axial direction has been developed (for example, see Patent Document 2).

Japanese Utility Model Publication No. 6-21421 JP 2001-173618 A

  According to the pipe connection structure of Patent Document 2, even when bending stress is applied to the connection part during cleaning with the cleaning tool, it is possible to effectively prevent the connection part from being loosened or broken, and each of the simple structures can be used. A pair of cylindrical pipes can be easily connected and integrated so as to be detachable in the axial direction, but development of a new technology is desired to make the connecting operation of these cylindrical pipes smoother. ing.

  An object of this invention is to provide the connection structure of the pipe which can connect each pair of cylindrical pipe which comprises a handle | strain more smoothly.

  The present invention inserts the male side end of one cylindrical pipe into the female side end of the other cylindrical pipe, and matches the male side projection insertion hole and the female side projection insertion hole to engage the projection from the outside. A pipe connecting structure in which a sleeve-like member is attached so as to cover a joint portion between the male-side end portion and the female-side end portion from the outside, and the sleeve-like member includes the seam portion. A contact rib that protrudes inward from the inner peripheral surface of the portion covering the portion and the end surface of the female side end portion contacts from the rear is provided continuously or intermittently in the circumferential direction. An insertion guide inclined portion extending obliquely outward in the radial direction toward the distal end side of the sleeve-like member is provided continuously or intermittently in the circumferential direction, and the end surface is in contact with the contact rib Abut the surface of the other cylindrical pipe on the female side end. By providing a pipe connection structure in which the male side end of the one cylindrical pipe is inserted into the female side end while being guided by the insertion guide inclined part in a state where a tube-shaped member is mounted. The above-mentioned purpose has been achieved.

  According to the pipe connection structure of the present invention, each pair of cylindrical pipes constituting the handle can be connected more smoothly, and when the cylindrical pipe is dropped on the floor, the engagement protrusion of the sleeve-like member It is possible to effectively avoid breakage or breakage of the like.

1 is a perspective view of a cleaning tool having a handle to which cylindrical pipes are connected by a pipe connection structure according to a preferred embodiment of the present invention. (A)-(c) The perspective view shown notched in the longitudinal direction center part explaining the structure of the connection structure of the pipe which concerns on preferable one Embodiment of this invention, and the condition which connects a pair of cylindrical pipe member. FIG. A state in which a sleeve-like member is attached to the female side end portion is shown, (a) is a longitudinal sectional view in the vertical direction, (b) is a longitudinal sectional view in the lateral direction along A-A in (a) as viewed from below. FIG. It is a disassembled perspective view explaining the structure of the connection structure of the pipe which concerns on preferable one Embodiment of this invention. It is a perspective view cut out and shown in the longitudinal direction center part explaining the situation which cancels | releases connection of a pair of cylindrical pipe. It is the perspective view which looked at the inner side of a sleeve-shaped member from the front end side explaining the other form of an insertion guide inclination part.

  As shown in FIG. 1, a pipe connection structure 10 according to a preferred embodiment of the present invention has a handle 12 formed by connecting and integrating a plurality of cylindrical pipes 11 in the axial direction, for example, a floor surface or the like. Assembling the handle 12 of the cleaning tool 16 comprising a cleaning head 14 to which a cleaning sheet 13 for wiping and cleaning is attached, and a handle 12 rotatably connected to the upper surface of the cleaning head 14 via a joint portion 15. It was adopted at the time. That is, the cleaning tool 16 is disassembled into parts such as the cleaning head 14 and the cylindrical pipe 11 for the convenience of transportation and sales, and these parts are put into a product in a state of being put together. Assemble and use. In the pipe connection structure 10 of this embodiment, when a plurality of cylindrical pipes 11 are connected and integrated in the axial direction to form the handle body 12a of the handle 12, the connecting operation of each pair of cylindrical pipes 11 is smooth. Make it possible.

  Moreover, as shown in FIGS. 2A to 2C, the pipe connection structure 10 of this embodiment is a male pipe of one cylindrical pipe 11a of each pair of cylindrical pipes 11 (11a, 11b). When inserting the side end portion 17a into the female end portion 17b of the other cylindrical pipe 11b, even when the male end portion 17a is inserted into the female end portion 17b with these center axes being displaced, By correcting such a misalignment of the central axis, it is possible to effectively prevent the end surface of the male end portion 17a from interfering with the end surface of the female end portion 17b and becoming difficult to connect.

  And the pipe connection structure 10 of this embodiment inserts the male side end part 17a of one cylindrical pipe 11a in the female side end part 17b of the other cylindrical pipe 11b, as shown in FIGS. Then, the male side projection insertion hole 18a and the female side projection insertion hole 18b are matched to lock the engagement projection 19 from the outside, and the joint portion 20 between the male side end portion 17a and the female side end portion 17b is formed. It is the structure of the connection part 24 which covers from the outer side, and the sleeve-like member 21 is attached, Comprising: The sleeve-like member 21 protrudes inward from the inner peripheral surface of the part which covers the seam part 20, and is the end surface of the female side edge part 17b Is provided continuously or intermittently in the circumferential direction (in FIG. 2 or the like, a circumferentially continuous portion and a part of the circumferential direction are notched). The case where it is provided in an annular shape The contact rib 22 has a diameter toward the distal end side of the sleeve-like member 21 on the opposite side of the sleeve-like member 21 in the axial direction from the contact surface 22a (see FIG. 3) with the female-side end portion 17b. The insertion guide inclined portion 23 that is inclined and extended outward in the direction is provided continuously or intermittently in the circumferential direction (FIG. 2 and the like show a case where it is continuously provided in the circumferential direction. ). As shown in FIGS. 3 (a) and 3 (b), the end surface of the female side end portion 17b is brought into contact with the contact surface 22a of the contact rib 22, and the sleeve on the female side end portion 17b of the other cylindrical pipe 11b. With the cylindrical member 21 mounted, the male side end 17a of one cylindrical pipe 11a is guided by the insertion guide inclined part 23 as shown in FIGS. 17b.

  Moreover, in this embodiment, the male side edge part 17a is an edge part by which the diameter reduction of one cylindrical pipe 11a was carried out.

  In the present embodiment, the cleaning tool 16 includes a cleaning head 14 and a handle 12 connected to a central portion of the upper surface of the cleaning head 14 via a joint portion 15 as shown in FIG.

  The cleaning head 14 has a rectangular planar shape with a long side of about 200 to 300 mm and a short side of about 50 to 150 mm. For example, the cleaning head 14 covers the lower surface of the head body 14a, which is a flat plate member made of plastic. A base body 14b that can be elastically deformed is attached. With the lower surface of the elastically deformable base body 14b as a cleaning surface, the cleaning sheet 13 is mounted covering the cleaning surface. Further, on the upper surface of the cleaning head 14 by the head main body 14a, a known sheet holding portion 14c made of a flexible elastic material having engagement slits formed at four corners is provided. After covering the lower surface (cleaning surface) of the base body 14b attached integrally to the lower surface side of the head main body 14a from below and winding the cleaning sheet 13 around the cleaning head 14, the end of the cleaning sheet 13 is held by the sheet. The cleaning sheet 13 can be easily attached to the cleaning head 14 so as to be attachable / detachable by being engaged with the engaging slit of the portion 14c.

  On the upper surface of the head main body 14 a of the cleaning head 14, a joint portion 15 is provided at the center portion thereof. The joint portion 15 includes various known mechanisms that connect the handle 12 so that it can rotate 360 degrees not only in the vertical direction but also in the circumferential direction. The handle 12 is rotatably connected to the cleaning head 14 via the joint portion 15.

  In the present embodiment, as the cleaning sheet 13 that covers the cleaning surface and is attached to the cleaning head 14 and attaches dust, dirt, and the like, various known cleaning sheets such as olefin-based ultrafine fiber nonwoven fabrics are used. it can.

  The handle 12 that constitutes the cleaning tool 16 together with the cleaning head 14 includes an elongated rod-like handle body 12a and a grip portion 12b that is integrally connected and fixed to the upper portion of the handle body 12a.

  The handle body 12a connects a plurality of cylindrical pipe members 11 made of, for example, an aluminum alloy or ABS (acrylonitrile butadiene styrene) resin in the axial direction via the connecting portion 24 by the pipe connecting structure 10 of the present embodiment. Thus, the entire handle 12 including the gripping portion 12b is assembled so as to have a length of, for example, about 100 to 150 cm suitable for performing the cleaning work. The lower end portion of the handle body 12 a is rotatably connected to the cleaning head 14 via the joint portion 15. A gripping portion 12b is detachably attached to the upper end portion of the handle body 12a via a connecting portion 25 having a structure substantially similar to a connecting portion 24 between cylindrical pipe members 11 described later.

  The grip portion 12b is a molded product made of, for example, ABS resin, and has a substantially cylindrical shape with a thickness and an outer shape that can be easily gripped by hand. As the relatively soft elastic material having rubber hardness (the hardness measured by durometer type A (Shore A) as defined in JIS K 6253) of 30 to 60, an ethylene vinyl acetate ( An end cap 26 which is a transparent or translucent elastic member made of EVA) resin is attached. By attaching the end cap 26 to the upper end portion of the grip portion 24, for example, it becomes possible to improve the stability when the handle 12 is leaned against the wall, and a cleaning tool that grips the grip portion 12b. 16 operability can be improved.

  And in this embodiment, each pair of cylindrical pipe members 11a and 11b of the plurality of cylindrical pipe members 11 constituting the handle body 12a is connected via the connecting portion 24 by the pipe connecting structure 10 of this embodiment. Each is connected and integrated in the axial direction. That is, in this embodiment, as shown in FIG. 2 to FIG. 4, the connecting portion 24 has a reduced diameter male side end portion 17 a of one cylindrical pipe 11 a and a female side end portion of the other cylindrical pipe 11 b. 17 b is inserted into the pipe insertion opening 27, the male side protrusion insertion hole 18 a and the female side protrusion insertion hole 18 b are matched, and the engaging protrusion 19 is inserted and locked from the outside. It is configured by attaching a sleeve-like member 21 so as to cover the joint portion 20 with the end portion 17b from the outside.

  In the present embodiment, the sleeve-like member 21 includes a sleeve main body 21a, a notch ring member 28, and a button member 29, as shown in FIG. 2 and 3, the sleeve-like member 21 is a hollow cylindrical member having an inner diameter substantially the same as the outer diameter of the cylindrical pipe member 11, and is axially intermediate between the openings at both ends. Since the portion is formed to be thicker than the vicinity of the opening, the axially intermediate portion has an outer peripheral surface shape that rises smoothly. An annular belt groove 21b extending in the circumferential direction is formed in the raised axial intermediate portion of the sleeve-like member 21 by cutting the outer peripheral surface into a belt groove shape. As described later, a notch ring member 28 and a button member 29 are attached to the annular belt groove 21b.

  A sleeve projection insertion hole 21c is formed in the annular belt groove 21b of the sleeve body 21a. The engagement protrusion 19 provided on the notch ring member 28 is inserted and mounted in the sleeve protrusion insertion hole 21c. The sleeve body 21a is formed with a cut 30 extending in the axial direction of the sleeve-like member 21 so as to cross the central portion of the sleeve projection insertion hole 21c. By forming the cuts 30, the sleeve body 21a can be elastically deformed so that the diameter can be increased.

  Furthermore, in this embodiment, in the inner peripheral surface of the sleeve main body 21a, as a part covering the joint part 20 of the male side end part 17a and the female side end part 17b, in the axially intermediate part between the opening parts at both ends. An abutment rib 22 projects inward and is provided in an annular shape at a position offset toward the tip side. The contact rib 22 preferably protrudes inward from the inner peripheral surface of the sleeve main body 21a at a height approximately equal to the thickness of the end surface of the female end portion 17b of the other cylindrical pipe 11b. The end surface of the female side end portion 17b is brought into contact with a flat contact surface 22a (see FIG. 3) formed on the rear end side of the sleeve main body 21 of the contact rib 22. The abutment rib 22 is not necessarily provided continuously in the circumferential direction over the entire inner circumferential surface of the sleeve main body 21a. It may be provided intermittently. In the present embodiment, the abutment rib 22 is provided in an annular shape in which a part in the circumferential direction is cut in consideration of ease of molding of the sleeve body 21a with synthetic resin (FIG. 2A). (See FIG. 4).

  In the present embodiment, the abutment rib 22 is provided with an insertion guide inclined portion 23 that is inclined and extended radially outward toward the distal end side of the sleeve-like member 21. In the present embodiment, the insertion guide inclined portion 23 has its inclined surface 23a radially outward with an inclination angle θ (see FIG. 3A) of preferably 10 to 30 degrees with respect to the axial direction of the sleeve-like member 21. The contact rib 22 is provided so as to extend over the entire length in the circumferential direction.

  The insertion guide inclined portion 23 is not necessarily provided continuously over the entire length of the abutment rib 22 and can be provided intermittently in the circumferential direction. For example, as shown in FIG. 6, the insertion guide inclined portion 23 can also be configured by a plurality of tapered ribs 31 having tapered surfaces provided at predetermined intervals in the circumferential direction. The insertion guide inclined portion 23 is preferably provided so as to cover at least three places in the radial direction centered on the central axis of the sleeve-like member 21. In addition, the radially outwardly inclined surface 23a of the insertion guide inclined portion 23 is not necessarily inclined linearly, and may be an inclined surface that is curved and inclined, for example.

  Further, in the present embodiment, a positioning guide rib 32 is integrally provided on the inner peripheral surface of the sleeve body 21a so as to protrude inward from a position opposite to the sleeve protrusion insertion hole 21c in the radial direction (FIG. 2). And FIG. 3 (a)). The positioning guide rib 32 is inserted and locked in the positioning locking hole 33 formed in the female side end portion 17b when the sleeve main body 21a is attached to the female side end portion 17b of the other cylindrical pipe 11b. It protrudes inward from the inner peripheral surface of the side end 17b.

  In this embodiment, after attaching the sleeve main body 21a to the female side end 17b of the other cylindrical pipe 11b, the notch ring member 28 and the button member 29 are attached to the annular belt groove 21b of the sleeve main body 21a. A sleeve-like member 21 is formed. The sleeve main body 21a is elastically deformed so as to expand the notch 30 and expand the diameter, thereby inserting and locking the positioning guide rib 32 into the positioning locking hole 33 formed in the female side end portion 17b. It is attached to the part 17b. Further, by this, the sleeve projection insertion hole 21c is arranged so as to match the female side projection insertion hole 18b of the female side end portion 17b.

  The notch ring member 28 is a band plate substantially ring-shaped member having a width similar to that of the annular band groove 21b of the sleeve body 21a, which is curved so as to have an arc shape exceeding a semicircle. An engagement protrusion 19 is provided so as to protrude inward from the inner peripheral surface of the central portion facing the portion 28a (see FIG. 4). Further, a leg locking groove 28b is formed in the inner surface of a portion of the notch ring member 28 that is continuous with the notch 28a so as to extend from the notch 28a in the circumferential direction. The notch ring member 28 pushes the notch part 28a and elastically deforms the notch part 28a. In a state of being inserted and engaged from the outside, the sleeve body 21a is mounted so as to be fitted into the annular band groove 21b from the outside. As a result, the distal end portion of the engagement projection 19 is formed so that the tapered surface 19a provided at the distal end portion faces the pipe insertion opening 27 side of the female side end portion 17b and the female side end of the other cylindrical pipe 11b. It protrudes inward from the inner peripheral surface of the part 17b.

  Further, the notch ring member 28 functions as an elastic portion that is deformed radially outward by a pressing operation from the button member 28 and generates a biasing force radially inward, and is integrated therewith. With the engagement protrusion 19 pressed from the outside, the engagement protrusion 19 is protruded inward from the inner peripheral surface of the sleeve-like member 21.

  The button member 29 is, for example, a plastic molded product having an elliptical flat shape whose outer peripheral surface is a gently convex curved surface, and a pair of extruded leg portions extending integrally from the side edge portions on both sides. 29a (see FIG. 4). The button member 29 engages the pushing leg portions 29a with the leg engaging grooves 28b on both sides of the notched portion 28a of the notched ring member 28, and covers the annular belt groove 21b in the region of the notched portion 28a. Thus, it mounts | wears in the state which hold | maintained the clearance gap 38 between the annular belt grooves 21b (refer FIG. 2, FIG. 3 (a)).

  Thus, with the end surface of the female side end portion 17b in contact with the contact surface 22a of the contact rib 22 from the rear, the sleeve main body 21a and the notch are notched on the female side end portion 17b of the other cylindrical pipe 11b. A sleeve-like member 21 composed of a ring member 28 and a button member 29 is attached.

  The male side end 17a of one pipe member 11a connected to the female side end 17b of the other cylindrical pipe 11b is, as shown in FIGS. 2 and 4, a pipe insertion opening 27 of the female side end 17b. It is formed in a state of being reduced in diameter so that it can be inserted into the. The male side end portion 17a is formed with a male side projection insertion hole 18a that can match the female side projection insertion hole 18b of the female side end portion 17b and the sleeve projection insertion hole 21c of the sleeve main body 21a. In addition, a taper surface 19a of the engagement protrusion 19 is directed to the male side protrusion insertion hole 18a at the distal end edge portion of the male side end part 17a adjacent to the male side protrusion insertion hole 18a in the axial direction. A guide recess 35 serving as a starting portion when riding on the outer peripheral surface of 17a is provided without the leading edge being recessed to reach the male projection insertion hole 18a. Further, the male side end portion 17a is arranged on the opposite side in the radial direction from the male side projection insertion hole 18a, and is cut in the axial direction from the tip edge portion of the male side end portion 17a or the outer peripheral surface is grooved. A guide groove 34 is provided which extends in a recess.

  And in this embodiment, in order to connect a pair of cylindrical pipes 11a and 11b, as shown to Fig.2 (a), the female side edge part of the other cylindrical pipe 11b with which the sleeve-shaped member 21 was mounted | worn. The male side end 17a of one cylindrical pipe 11a is inserted toward the pipe insertion opening 27 of 17b. As shown in FIG. 2 (b), the insertion operation is performed by a guide groove provided in the positioning guide rib 32 protruding from the inner surface of the female side end portion 17b and extending in the male side end portion 17a in the axial direction. By locking and guiding 34, it becomes possible to perform smoothly in a stable state while positioning. Preferably, a guide 36 is provided on the outer peripheral surface of the sleeve-like member 21 by providing a marking portion 36 for displaying a position where the positioning guide rib 32 protrudes at a position corresponding to the positioning guide rib 32 and the circumferential direction. While aligning the groove 34 with the marking portion 36, the male end portion 17a can be more smoothly inserted into the female end portion 17b.

  When the male end portion 17a is inserted until the distal end edge of the male end portion 17a contacts the tapered surface 19a of the engaging projection 19 protruding from the inner surface of the female end portion 17b (see FIG. 2B). ), And further insert the male end 17a. As a result, the tapered surface 19a of the engaging protrusion 19 rides on the outer peripheral surface of the male end portion 17a via the guide recess 35 at the distal end edge of the male end portion 17a, so that the notch ring member 28 is expanded in diameter. At the same time, the engagement protrusion 19 is pushed up.

  As shown in FIG. 2C, until the male projection insertion hole 18a of the male end 17a matches the female projection insertion hole 18b of the female end 17b and the sleeve projection insertion hole 21c of the sleeve body 21a. When the male side end portion 17a is inserted, the engagement protrusion 19 is pushed down by the biasing force toward the inside of the notched ring member 28 in the expanded state. When the engagement protrusion 19 is pushed down, the male protrusion insertion hole 18a of the matched male end 17a, the female protrusion insertion hole 18b of the female end 17b, and the sleeve protrusion insertion hole 21c of the sleeve main body 21a The engaging protrusion 19 is simultaneously engaged with each of the protrusion insertion holes 18a, 18b, and 21c. Thereby, the connection part 24 of a pair of cylindrical pipe 11a, 11b by the superimposed male side edge part 17a and female side edge part 17b is formed.

  In the present embodiment, in the state where the engagement protrusions 19 shown in FIG. 2C are simultaneously engaged with the protrusion insertion holes 18a, 18b, and 21c, at the joint portion 20, the pipe insertion opening 27 of the female side end portion 17b is formed. Since the base end portion 37 of the male end portion 17a having a reduced diameter is in contact with the opening peripheral portion, the opening peripheral portion of the pipe insertion opening 27 of the female end portion 17b is supported by the base end portion 37, Further, it becomes possible to connect the pair of cylindrical pipes 11a and 11b in a stable state.

  Moreover, in this embodiment, in order to cancel | release the connection state of a pair of cylindrical pipe 11a, 11b connected by the connection part 24, as shown in FIG. 5, the clearance gap 38 ( The button member 29 is pressed so as to fill in (see FIG. 2). By pressing the button member 29, the notch ring member 28 expands the notch 28a by the pushing force through the pushing leg 29a locked in the leg locking groove 28b (see FIG. 4). However, it is pushed out along the outer peripheral surface of the annular belt groove 21b. When the notch ring member 28 is pushed outward, the engagement protrusion 19 is disengaged from at least the male protrusion insertion hole 18a of the male end 17a. In this state, the male end 17a is extracted from the female end 17b, and the connection state of the pair of cylindrical pipes 11a and 11b can be easily released.

  According to the present embodiment, the positioning guide rib 32 and the guide groove 34 for guiding the insertion of the male side end portion 17a into the female side end portion 17b are separated from the respective protrusion insertion holes 18a, 18b, 21c in the circumferential direction. Moreover, since it is provided in the part on the opposite side in the radial direction, it is possible to insert the male side end portion 17a in a more stable state. The positioning guide rib 32 and the guide groove 34 do not have to be provided in a portion on the opposite side in the radial direction as long as they are spaced apart from the protrusion insertion holes 18a, 18b, 21c in the circumferential direction. This also eliminates the need to provide a projection guiding groove or the like continuous with the peripheral edge of the male side projection insertion hole 18a of the male side end portion 17a or the female side projection insertion hole 18b of the female side end portion 17b. Therefore, it is effectively avoided that there is no stepped portion due to the projection guide groove or the like at the peripheral edge of the opening of the projection insertion holes 18a, 18b, and the engagement projection 19 is easily disengaged through such a stepped portion. It becomes possible to do. Further, it is possible to prevent a trouble that the positioning guide rib 32 is erroneously guided to the projection guide groove.

  Further, since the positioning guide rib 32 is integrally provided on the sleeve body 21a, the positioning guide rib 32 can be used even when the pair of cylindrical pipes 11a and 11b are connected while pressing the button member 29. Since it still protrudes inward from the inner peripheral surface of the side end portion 17b, the positioning guide rib 32 cannot be erroneously engaged and locked with a portion other than the guide groove 34 of the male side end portion 17a. . Therefore, while the positioning guide rib 32 of the female side end portion 17b is locked and guided in the guide groove 34 of the male side end portion 17a, the male side projection hole 18a is aligned with the female side projection insertion hole 18b. The end portion 17a can be inserted into the female side end portion 17b, and the engaging protrusion 19 can be reliably engaged and locked in the protrusion insertion holes 18a, 18b, and 21c. Therefore, when the user uses the cleaning tool with the incomplete connection structure in which the engagement protrusion 19 is not engaged or locked with the male-side protrusion insertion hole 18a or the like, each pipe is disconnected. Can be prevented.

  And according to the pipe connection structure 10 of this embodiment provided with the above-mentioned structure, it becomes possible to connect each pair of cylindrical pipe 11a, 11b which comprises the handle | pattern 12 still more smoothly.

  That is, according to this embodiment, the sleeve-like member 21 protrudes inward from the inner peripheral surface of the portion covering the joint portion 20 of the male end portion 17a and the female end portion 17b, and the contact rib 22 is formed. Since the contact rib 22 is provided with an insertion guide inclined portion 23 which is inclined and extended radially outward toward the distal end side of the sleeve-like member 21, the sleeve-like member 21 is When the male side end 17a of one cylindrical pipe 11a is inserted into the female side end 17b of the other cylindrical pipe 11b that is mounted, the male side end 17a with these center axes being displaced. Is inserted into the female side end portion 17b, the end surface of the male side end portion 17a interferes with the end surface of the female side end portion 17b by correcting the displacement of the central axis by the insertion guide inclined portion 23. And making it difficult to connect To be allows to avoid, whereby each pair of cylindrical pipe 11a, it is possible to slide into coupled to 11b further smoothly.

  In addition, according to the present embodiment, the sleeve-like member 21 has the other cylindrical pipe 11b in a state where the end face is in contact with the contact surface 22a of the contact rib 22 protruding inward from the inner peripheral surface thereof. Since it is attached to the female end 17b, before the male end 17a of one cylindrical pipe 11a is inserted and connected, for example, when the other cylindrical pipe 11b is dropped on the floor, the cylinder Even when any end surface of the pipe 11b collides with the floor, even when an impact force is applied to the sleeve-like member 21, such an impact force is supported by the contact surface 22a, and the female end portion 17b is supported. The engaging protrusion 19 of the sleeve-like member 21 inserted and mounted in the female side protrusion insertion hole 18b and the positioning guide rib 32 protruding inward from the inner peripheral surface of the female side end portion 17b are broken or damaged. Effectively avoid Door is possible.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the male side end portion does not necessarily need to be a diameter-reduced end portion of a cylindrical pipe, and the sleeve-like member does not necessarily need to be composed of a sleeve body, a notch ring member, and a button member. . Moreover, the guide recessed part 35 of the front-end | tip edge part of the male side edge part 17a is not necessarily required. In addition, the present invention is not limited to the handle of the cleaning tool, and is adopted as a pipe connection structure in various long rod-shaped members formed by connecting and integrating a plurality of cylindrical pipes in the axial direction. Can do.

DESCRIPTION OF SYMBOLS 10 Pipe connection structure 11 Cylindrical pipe 11a One cylindrical pipe 11b The other cylindrical pipe 12 Handle 12a Handle main body 13 Cleaning sheet 14 Cleaning head 15 Jon part 16 Cleaning tool 17a Male side edge part 17b Female side edge part 18a Male Side projection insertion hole 18b Female side projection insertion hole 19 Engagement projection 20 Joint portion 21 Sleeve-like member 21a Sleeve body 21b Annular groove 21c Sleeve projection insertion hole 22 Contact rib 22a Contact surface 23 Insert guide inclined portion 23a Inclined surface 24 connecting portion 28 notch ring member 29 button member 31 taper rib 32 positioning guide rib 33 positioning locking hole 34 guide groove

Claims (5)

Insert the male end of one cylindrical pipe into the female end of the other cylindrical pipe, align the male projection insertion hole with the female projection insertion hole, and lock the engagement projection from the outside. And a pipe connection structure in which a sleeve-like member is attached so as to cover a joint portion between the male side end portion and the female side end portion from the outside,
The sleeve-like member is provided with a contact rib that protrudes inward from the inner peripheral surface of the portion covering the joint portion and that the end surface of the female side end portion contacts from the rear side continuously or intermittently in the circumferential direction. In the corresponding contact rib, an insertion guide inclined portion extending obliquely outward in the radial direction toward the distal end side of the sleeve-like member is provided continuously or intermittently in the circumferential direction.
The male end of the one cylindrical pipe with the end face abutted against the abutment surface of the abutment rib and a sleeve-like member attached to the female end of the other cylindrical pipe Is a pipe connection structure that is guided by the insertion guide inclined portion and inserted into the female end.   2. The pipe connection structure according to claim 1, wherein the insertion guide inclined portion includes a plurality of tapered ribs each having a tapered surface provided at predetermined intervals in the circumferential direction.   The pipe connection structure according to claim 1, wherein the male side end portion is an end portion of the one cylindrical pipe having a reduced diameter.   The engagement protrusion is pressed from the outside by an elastic portion provided on the sleeve-shaped member and deformed radially outward to generate a biasing force radially inward. The pipe connection structure according to claim 1, wherein the pipe connection structure projects inward from an inner peripheral surface.   A cleaning tool having a handle formed by connecting and integrating cylindrical pipes in the axial direction by the pipe connection structure according to any one of claims 1 to 4.

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