JP4412816B2 - Pipe connection structure - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a pipe connection structure for connecting and integrating a pair of cylindrical pipes in the axial direction, a sleeve member used in the connection structure, and a cleaning tool using the connection structure.
[0002]
[Prior art and problems to be solved by the invention]
For example, the long rod-like member 51 such as the handle of the cleaning tool 50 or the handle of the cane shown in FIG. 5 may be formed by connecting and integrating a plurality of cylindrical pipes 52 in the axial direction. As the structure of the connecting portion 53 for connecting and integrating the cylindrical pipe 52, for example, a female screw body having a female screw on the inner peripheral surface is provided at each end opening of a pair of cylindrical pipes 52, 52 to be connected. A pair of cylindrical pipes 52, 52 are joined and integrated by mounting these pair of female screw bodies facing each other and screwing the male screw bodies provided with male threads on the outer peripheral surface to both female screw bodies arranged opposite to each other. The structure to be known is known.
[0003]
According to the structure of the conventional connecting portion, since the male screw body is screwed to the female screw body to connect the pair of cylindrical pipes 52, 52, it takes time and effort to connect and integrate, and the joint portion is the pipe portion. Appears on the surface and is inferior in cosmetics.
[0004]
The present invention is capable of easily connecting and integrating a pair of cylindrical pipes in the axial direction by a simple operation, and is used for the connecting structure of a pipe with a seam portion covered and excellent in cosmetics, and the connecting structure. An object of the present invention is to provide a sleeve member and a cleaning tool using the connection structure.
[0005]
[Means for Solving the Problems]
The present invention inserts the reduced diameter male end of one cylindrical pipe into the female end of the other cylindrical pipe, aligns the male projection insertion hole with the female projection insertion hole, A pipe connecting structure that locks the engaging protrusion and covers a sleeve member covering the engaging protrusion and the joint portion of the pair of cylindrical pipes, and the sleeve member can be expanded in diameter. After inserting the male side end portion from the state of slidably mounted on the outer peripheral surface of the female side end portion so as to cover the engaging projection inserted and arranged in the female side projection insertion hole The above object is achieved by providing a pipe connection structure in which the latching engagement protrusion and the joint portion are covered with the sleeve member by sliding to one cylindrical pipe side.
[0006]
In addition, the present invention inserts the reduced diameter male end of one cylindrical pipe into the female end of the other cylindrical pipe, aligns the male protrusion insertion hole with the female protrusion insertion hole, A sleeve member used for a pipe connection structure in which an engagement protrusion is locked from a surface and a sleeve member is disposed so as to cover the engagement protrusion and the joint portion of the pair of cylindrical pipes. Is provided with a structure capable of expanding the diameter by forming a notch over the entire axial length of the sleeve member, and on both side edges sandwiching the notch, finger-hanging protrusions projecting outward are the edges. The above-mentioned object is achieved by providing a sleeve member formed along the line.
[0007]
Moreover, this invention achieves the said objective by providing the cleaning tool which has a handle | steering_piece which connects and integrates a cylindrical pipe to an axial direction by the connection structure of the said pipe.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The pipe connection structure according to a preferred embodiment of the present invention includes, for example, a cleaning plate to which a cleaning sheet member for cleaning a floor surface or the like is attached, and a handle provided upright from the cleaning plate. This pattern of the cleaning tool is employed when a plurality of cylindrical pipes are connected and integrated in the axial direction (see FIG. 5). In other words, the cleaning tools are disassembled into parts such as cleaning plates and cylindrical pipes for convenience of transportation and sales, and these parts are put together to produce a product. To do.
[0009]
A pipe connection structure 10 according to the first embodiment of the present invention is employed at a connection location of each pair of cylindrical pipes 11 and 12 constituting a handle made of a plurality of cylindrical pipes. 2 (a) to 2 (c), the male side end 13 having a reduced diameter of one cylindrical pipe 11 is inserted into the female side end 14 of the other cylindrical pipe 12, and the male side end is inserted. The male side projection insertion hole 15 formed in the portion 13 and the female side projection insertion hole 16 formed in the female side end portion 14 are matched to lock the engagement projection 17 from the outer peripheral surface of the female side end portion 14. The sleeve member 19 is arranged so as to cover the engaging protrusion 17 and the joint portion 18 (see FIG. 2B) of the pair of cylindrical pipes 11 and 12.
[0010]
The sleeve member 19 has a configuration that can be elastically deformed to expand the diameter, covers the engagement protrusion 17 inserted and disposed in the female-side protrusion insertion hole 16, and is slidably mounted on the outer peripheral surface of the female-side end portion 14. In this state (see FIG. 2 (a)), by inserting the male side end portion 13 and then sliding it to the one cylindrical pipe 11 side (see FIG. 2 (b)), the locked engagement protrusion 17 and the seam portion 18 (see FIG. 2C).
[0011]
According to the first embodiment, the engaging protrusion 17 protrudes inward from the inner peripheral surface of the sleeve member 19 together with the sleeve member 19. The female-side protrusion insertion hole 16 has an elongated shape in the axial direction X of the other cylindrical pipe 12. The sleeve member 19 is slid in the axial direction X while moving the engagement protrusion 17 along the female side protrusion insertion hole 16, and the male side protrusion insertion hole 13 (see FIG. 2 (b)), the engaging protrusion 17 is locked. In a state where the sleeve member 19 is mounted on the outer peripheral surface of the female side end portion 14 before sliding, the engagement protrusion 17 is positioned at the rear end portion of the female side protrusion insertion hole 16 and the tip thereof is It attaches so that it may not protrude outside from the front-end | tip edge part of the other cylindrical pipe 12 (refer FIG. 2 (a), (b)).
[0012]
The cylindrical pipes 11 and 12 are metal (aluminum) pipe members each having a circular hollow cross section. The male end 13 of one cylindrical pipe 11 is reduced in diameter, and the reduced male end 13 is inserted into the distal end opening 20 of the female end 14 of the other cylindrical pipe 12. A double-structured connecting portion 21 is formed in which the male side end 13 of one cylindrical pipe 11 and the female side end 14 of the other cylindrical pipe 12 overlap each other in close contact.
[0013]
The male side end portion 13 of one cylindrical pipe 11 has its outer peripheral surface once reduced in diameter as a steep slope portion 22 and then gradually reduced in diameter toward the tip with a gentle gradient. The female peripheral end 14 of the other cylindrical pipe 12 has an inner peripheral surface that expands toward the tip with a gradient that matches the gentle gradient of the male end 13. By inserting the male end 13 of one cylindrical pipe 11 into the female end 14 through the tip opening 20 until the steep slope 22 abuts the edge of the tip opening 20 , the connecting portion 21. The male side end 13 and the female side end 14 can be easily brought into close contact with each other.
[0014]
Further, in the state where the male end 13 is inserted into the female end 14 until the steep slope portion 22 contacts the edge of the tip opening 20, the circular male protrusion insertion hole 15 is inserted into the oval female protrusion. A male-side protrusion insertion hole 15 is formed at a position that matches the tip of the hole 16. In addition, on the outer peripheral surface of the male side end portion 13, a linear protrusion guide groove 23 is formed along the axial direction X from the leading edge of the male side end portion 13 to the male side protrusion insertion hole 15. When inserting the male end 13 and sliding the sleeve member 19, the engaging protrusion 17 that is inserted into the female protrusion 14 and protrudes inside the female end 14 is inserted into the male protrusion insertion hole. Guide to 15. Further, on the outer peripheral surface of the sleeve member 19, a linear guide band 24 along the axial direction X extends from the edge of the leave member 19 to the engagement protrusion 17 so that the position of the engagement protrusion 17 in the circumferential direction can be seen. By inserting the male side end 13 while aligning the positions of the projection guide groove 23 and the male side projection insertion hole 15 with the guide band 24, the tip of the oval female side projection insertion hole 16 is provided. The circular male protrusion insertion hole 15 can be smoothly matched with the portion.
[0015]
The sleeve member 19 is a cylindrical member made of, for example, synthetic resin (plastic). On the inner surface of the sleeve member 19, a circular engagement protrusion 17 having a size to be fitted in the male-side protrusion insertion hole 15 is integrally formed so as to protrude inward. Is covered by the sleeve member 19. The sleeve member 19 is formed with cuts 25 extending over the entire length in the axial direction thereof, so that the interval between the cuts 25 is expanded in the circumferential direction, and the sleeve 19 is elastically deformed radially outward while being expanded in diameter. This can generate a biasing force that pushes the engagement protrusion 17 inward in the radial direction.
[0016]
According to the first embodiment, the sleeve member 19 is provided with finger hooking convex portions 26 protruding outward on both side edge portions with the cuts 25 sandwiched therebetween. By hooking the finger on the finger-hanging convex portion 26, the operation of widening the interval of the notches 25 in the circumferential direction is facilitated, and the operation of mounting the sleeve member 19 on the female side end portion 14 and the locking state of the engaging protrusion 17 It becomes possible to perform the operation of releasing and disassembling the pair of cylindrical pipes 11 and 12 smoothly.
[0017]
According to the connection structure 10 of the first embodiment, the pair of cylindrical pipes 11 and 12 can be easily connected and integrated in the axial direction X by the following simple operation, and the joint portion 18 can be easily formed. The cosmetics can be improved by covering the skin with. That is, the protrusion guide groove 23 and the guide band 24 are formed with respect to the distal end opening 20 of the female side end portion 14 to which the sleeve member 19 is mounted with the engagement protrusion 17 positioned at the rear end portion of the female side protrusion insertion hole 16. After alignment as a mark, the male side end 13 of one cylindrical pipe 11 is inserted into the female side end 14 of the other cylindrical pipe 12 (see FIG. 2A). By this insertion, the engagement protrusion 17 rides on the protrusion guide groove 23 while expanding the diameter of the sleeve member 19, and is inserted until the steeply inclined portion 22 contacts the edge of the tip opening 20, so that the male-side protrusion insertion hole 15 is a female. In a state where it is aligned with the tip of the side protrusion insertion hole 16, the engaging protrusion 17 is positioned at the approximate center of the protrusion guide groove 23 (see FIG. 2B). When the male-side protrusion insertion hole 15 is aligned with the tip of the female-side protrusion insertion hole 16, the engagement protrusion reaching the male-side protrusion insertion hole 15 is achieved by sliding the sleeve member 19 toward one cylindrical pipe 11. 17 is pushed into the male-side protrusion insertion hole 15 by the elastic biasing force directed inward in the radial direction by the sleeve member 19 and is fitted and locked. Accordingly, the pair of cylindrical pipes 11 and 12 are firmly connected and integrated in the axial direction X, and the sleeve member 19 is disposed so as to cover the engagement protrusion 17 and the joint portion 18 (see FIG. 2C). ).
[0018]
Further, according to the present embodiment, the sleeve member 19 is slidably attached to the female side end portion 14, and the distal end of the sleeve member 19 is the other cylindrical pipe 12 until the male side end portion 13 is inserted. Since it can be attached so as not to protrude outward from the tip edge of the tube, it is avoided that the cylindrical pipe 12 is lengthened by mounting the sleeve member 19 so that the parts of the cleaning tool before assembly are not bulky. Can be.
[0019]
Furthermore, according to the connection structure 10 of the first embodiment, the connection portion 21 has a considerable length between the male end portion 13 of one cylindrical pipe 11 and the female end portion 14 of the other cylindrical pipe 12. Since the double structure is closely arranged, even when a large bending stress is applied to the connecting portion 21 when the cleaning tool is used, the bending stress is sufficiently supported by the double structure lap portion. It is possible to effectively avoid loosening and breakage of the connecting portion 21. In particular, since the cylindrical pipes 11 and 12 are metal pipe members, they can exhibit a stronger support force against bending stress.
[0020]
3 and 4 (a) to 4 (c) show a pipe connection structure 30 according to a second embodiment of the present invention. Also in the connection structure 30 of the second embodiment, the sleeve member 31 has a configuration that can be elastically deformed and expanded in diameter, and covers the engagement protrusion 33 inserted and disposed in the female side protrusion insertion hole 32 so as to cover the female side end. From the state of being slidably mounted on the outer peripheral surface of the portion 14 (see FIG. 4A), by inserting the male side end portion 13 and then sliding it to the one cylindrical pipe 11 side (FIG. 2B) The sleeve member 31 is disposed so as to cover the engaging protrusion 33 and the joint portion 18 that are locked (see FIG. 2C).
[0021]
According to the second embodiment, the engaging protrusion 33 is a member different from the sleeve member 31 and is inserted and disposed in the female side protrusion insertion hole 32 in a state where the substrate portion 34 is disposed on the outer peripheral surface of the female side end portion 14. Has been. Further, at the position facing the notch 35 of the sleeve member 31, a belt-like convex portion extending in the axial direction X from the edge on the other cylindrical pipe 11 side of the sleeve member 31 and becoming one step higher from the outer peripheral surface. 36 is provided, and a slide groove 37 extending in the axial direction X with the inner peripheral surface of the sleeve member 31 recessed outward is formed inside the belt-like convex portion 36. The sleeve member 31 is slid to the other cylindrical pipe 11 side while the base plate portion 34 is loosely fitted in the slide groove 37, and the sleeve member 31 is disposed so as to cover the engaged engaging projection 33 and the joint portion 18. . When the sleeve member 31 is mounted on the outer peripheral surface of the female end 14 before sliding, the front engagement member 38 is provided with an engagement pin 38 provided on the upper surface of the substrate portion 34 on the belt-like convex portion 36. The base plate 34 is positioned on the front side of the slide groove 37 by being engaged with the joint hole 39, and the tip of the sleeve member 31 is attached so as not to protrude outward from the tip edge of the other cylindrical pipe 12. (See FIGS. 4A and 4B).
[0022]
According to the second embodiment, in the state where the male side end portion 13 is inserted into the female side end portion 14 until the steep slope portion 22 contacts the edge of the tip opening 20, the circular male side protrusion insertion hole 15 is formed. A male-side projection insertion hole 15 and a female-side projection insertion hole 32 are formed at positions that match the female-side projection insertion hole 32 of the same shape. In addition, the sleeve member 31 is not provided with the engaging protrusion which protrudes inward integrally, and the notch 35 is formed over the axial direction full length. In addition, finger-hanging convex portions 26 are provided along the edge portions on both side edges sandwiching the notch 35. Further, the belt-like convex portion 36 is provided with a rear engagement hole 40 for locking the base plate portion 34 so as to be positioned on the rear side of the slide groove 37 after the sleeve member 31 is slid, in addition to the front engagement hole 39. It has been.
[0023]
And according to the connection structure 30 of the second embodiment, like the connection structure 10 of the first embodiment, the pair of cylindrical pipes 11 and 12 can be easily connected and integrated in the axial direction X by the following simple operation. In addition, the joint portion 18 can be easily covered to improve the cosmetics. That is, the engagement protrusion 33 is inserted into the female-side protrusion insertion hole 32 and the engagement protrusion 33 protrudes inward, and the one end opening 20 of the female-side end portion 14 to which the sleeve member 31 is attached is The male side end portion 13 of the cylindrical pipe 11 is inserted (see FIG. 2A). By this insertion, the engagement protrusion 33 rides on the protrusion guide groove 41 while expanding the diameter of the sleeve member 31, and is inserted until the steep slope portion 22 contacts the edge of the tip opening 20. When matched with the side protrusion insertion hole 32, the engagement protrusion 33 is pushed into the male side protrusion insertion hole 15 by the elastic biasing force directed radially inward by the sleeve member 31, and engages with these protrusion insertion holes 15 and 32. It is locked (see FIG. 2B). When the engagement protrusion 33 is fitted and locked, if the sleeve member 31 is slid to the one cylindrical pipe 11 side, the substrate portion 34 is positioned on the rear side of the slide groove 37, and the engagement pin 38 is rearward. Locked in the engagement hole 40. As a result, the pair of cylindrical pipes 11 and 12 are firmly connected and integrated in the axial direction X, and the sleeve member 31 is disposed so as to cover the engagement protrusion 33 and the joint portion 18 (see FIG. 2C). ).
[0024]
Similarly to the connection structure 10 of the first embodiment, the connection structure 30 of the second embodiment can prevent the parts of the cleaning tool before assembly from being bulky, and the connection portion 21 can be bent greatly. Even if stress is applied, it is possible to effectively avoid loosening and breakage of the connecting portion 21.
[0025]
The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the sleeve member does not necessarily have a configuration in which a notch is formed over the entire length in the axial direction so that the entire diameter can be expanded, and the diameter can be partially expanded by other notches. Further, the present invention is not limited to the handle of the cleaning tool, but is a cylindrical shape in various long rod-shaped members formed by connecting and integrating a plurality of cylindrical pipes in the axial direction, such as indicator rods and nails. It can also be employed as a pipe connection structure.
[0026]
【The invention's effect】
According to the pipe connection structure of the present invention, the sleeve member used in the connection structure, and the cleaning tool using the connection structure, a pair of cylindrical pipes can be easily connected and integrated in the axial direction by a simple operation. As well as being able to cover the seam, it is excellent in cosmetics.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view illustrating a pipe connection structure according to a first embodiment of the present invention.
FIGS. 2A to 2C are longitudinal sectional views for explaining a state in which a pair of pipes are connected by the pipe connection structure according to the first embodiment of the present invention.
FIG. 3 is an exploded perspective view illustrating a pipe connection structure according to a second embodiment of the present invention.
FIGS. 4A to 4C are longitudinal sectional views illustrating a state in which a pair of pipes are connected by a pipe connection structure according to a second embodiment of the present invention.
FIG. 5 is a perspective view showing a cleaning tool having a conventional pipe connection structure.
[Explanation of symbols]
10, 30 Pipe connection structure 11 One cylindrical pipe 12 The other cylindrical pipe 13 Male side end 14 Female side end 15 Male side projection insertion holes 16, 32 Female side projection insertion holes 17, 33 Engagement projection 18 Joint portion 19, 31 Sleeve member 20 Tip opening 21 Connecting portion 22 Steep slope portion 23, 41 Protrusion guide groove 24 Guide band 25, 35 Notch 26 Finger hook convex portion 34 Substrate portion 36 Band-shaped convex portion 37 Slide groove 38 Engagement pin 39 Front Engagement hole 40 Rear engagement hole X Pipe axial direction

Claims (3)

Insert the reduced diameter male end of one cylindrical pipe into the female end of the other cylindrical pipe, align the male protrusion insertion hole with the female protrusion insertion hole, and insert the engagement protrusion from the outer peripheral surface. And a pipe connection structure in which a sleeve member is disposed so as to cover the joint between the engaging projection and the pair of cylindrical pipes.
The sleeve member has a configuration capable of expanding the diameter, covers the engagement protrusion inserted and arranged in the female side protrusion insertion hole, and is slidably mounted on the outer peripheral surface of the female side end. By sliding the male side end portion to the one cylindrical pipe side, the latching engagement protrusion and the seam portion are covered with the sleeve member ,
The engagement protrusion is a member different from the sleeve member, and is inserted and disposed in the female side protrusion insertion hole in a state where the base plate portion is disposed on the outer peripheral surface of the female side end portion, and the sleeve member is the other member A slide groove extending in the axial direction of the cylindrical pipe is provided on the inner peripheral surface thereof, and the sleeve member is slid while the base plate portion is loosely fitted in the slide groove, and the engagement is locked. A pipe connection structure covering the joint protrusion and the joint portion . A sleeve member used for the pipe connection structure according to claim 1, wherein the sleeve member has a configuration capable of expanding a diameter by forming a notch over the entire axial length of the sleeve member, A sleeve member in which finger-hanging projections projecting outward are formed along the edges on both side edges sandwiching the cut. 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 .

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