JP2007247907A - Connecting structure of pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting structure of a pipe, capable of smoothly disassembling a pair of connected cylindrical pipes by easily releasing a locking state of an engagement projection locked in aligned engagement holes. <P>SOLUTION: In this connecting structure 10 of the pipe where a sleeve member 19 having the engagement projection 17 projecting from its inner peripheral surface is attached from an outer side, and the engagement projection 17 are locked in the aligned engagement holes 15, 16 to axially connect and integrate the pair of cylindrical pipes 11, 12, the sleeve member 19 is composed of a sleeve body 21 extending at both sides of the engagement projection 17 along an outer peripheral face of a female-side end 14, and closely kept into contact with an outer peripheral face while remaining a clearance 18 between both circumferential ends 20, and a pressing body 26 composed of a pair of supporting leg portions 22 and a pressing portion 23, and disposed in a state of keeping a space 25 between the pressing portion 23 and an outer peripheral face of the female-side end 14 by joining tip portions of the pair of supporting leg portions 23 to both end portions 24 of the sleeve main body at a position opposed to the engagement projection 17. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

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

  For example, the long rod-like member 51 such as the handle of the cleaning tool 50 and the handle of the cane shown in FIG. 8 may be formed by connecting and integrating a plurality of cylindrical pipes 52 in the axial direction. As a structure of the connecting portion 53 for connecting and integrating the cylindrical pipe 52, a structure by screw connection is generally known. The connection structure by screw connection disassembles the cleaning tool 50 when assembling the cleaning tool 50, when storing the cleaning tool 50 in a compact size, changing the length of the handle 51, or disposing it. In doing so, it takes time and effort to rotate and fasten the cylindrical pipe 52 and to release it.

  On the other hand, the male side end of one cylindrical pipe is inserted into the female side end of the other cylindrical pipe to form a double pipe structure, and the engagement holes respectively formed on the peripheral surface of each end A pair of cylindrical pipes are pivoted by attaching a sleeve member with an engagement protrusion protruding from the inner peripheral surface from the outside and fitting and locking the engagement protrusion into the matched engagement hole. A connection structure that integrates and integrates in the direction has been proposed. According to this connection structure, it is easy to lock the engagement protrusion in the engagement hole. However, since the urging force acts inward on the mounted sleeve member, the engagement protrusion is locked. It is difficult to perform the release operation smoothly. In some cases, the inner (male side) tubular pipe may be accidentally pulled out with the engagement protrusion protruding inward from the engagement hole of the outer (female side) tubular pipe. There was a risk of damage to the protrusion.

  The present invention can easily release the locked state of the engaging protrusions locked in the matched engaging holes, and can smoothly disassemble the pair of connected cylindrical pipes. It is an object of the present invention to provide a pipe connection structure capable of effectively avoiding damage and a cleaning tool using the connection structure.

  The present invention inserts the male side end of one cylindrical pipe into the female side end of the other cylindrical pipe, matches the male side protrusion engaging hole and the female side protrusion engaging hole, and A pipe that connects and integrates the pair of cylindrical pipes in the axial direction by mounting a sleeve member with protruding protrusions from the outside and engaging the engaging holes with the engaging protrusions. The sleeve member is extended on both sides of the engagement protrusion along the outer peripheral surface of the female side end, and in a region exceeding the semicircle while leaving a gap between both ends in the circumferential direction. The sleeve body is arranged in close contact with the outer peripheral surface, and the pressing portions are supported on both sides by a support portion, and the tip ends of the support portions are respectively connected to both end portions of the sleeve body at positions facing the engagement protrusions. By doing so, the pressing portion and the female side end portion A pressing body provided to hold a space between the peripheral surface and the male side of the engaging protrusion by pressing the pressing portion and pushing the sleeve body toward the engaging protrusion. The above object is achieved by providing a pipe connection structure that releases the locked state of the protrusion engaging hole.

  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.

  According to the pipe connection structure of the present invention and the cleaning tool using the connection structure, the engagement state of the engagement protrusion locked in the matched engagement hole is easily released, and the connection is integrated. The pair of cylindrical pipes can be smoothly disassembled, and breakage of the engaging protrusions can be effectively avoided.

  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 cleaning tool is employed when a plurality of cylindrical pipes are connected and integrated in the axial direction (see FIG. 8). The cleaning tools are disassembled into parts such as cleaning plates and cylindrical pipes for the convenience of transportation and sales, and these parts are assembled into a product, and they are assembled and used at the time of use. These parts are appropriately disassembled when stored or discarded.

  And the pipe connection structure 10 of this embodiment is employ | adopted in the connection location of each pair of cylindrical pipes 11 and 12 which comprise the handle | pattern which consists of a some cylindrical pipe, FIG.1, FIG.3, and As shown in FIG. 4, the male side end 13 of one cylindrical pipe 11 is inserted into the female side end 14 of the other cylindrical pipe 12, and the male side protrusion engaging hole 15 and the female side protrusion engaging hole are inserted. 16 is fitted, and a sleeve member 19 having a fitting pin 17 as an engaging projection protruding from the inner peripheral surface is attached from the outside, and the fitting member is fitted into the engaging holes 15 and 16 where the fitting pin 17 is matched. By stopping, the pair of cylindrical pipes 11 and 12 are connected and integrated in the axial direction X.

  According to the present embodiment, as shown in FIG. 2, the sleeve member 19 extends on both sides of the position where the fitting pin 14 protrudes along the outer peripheral surface of the female end 14. A sleeve body 21 that is disposed in close contact with the outer peripheral surface of the female end 14 in a region exceeding the semicircle while leaving a gap 18 between both ends 20, 20 in the circumferential direction, a pair of support legs 22, 22 and their support It consists of a pressing part 23 supported on both sides by the leg parts 22, 22, and the both ends of the pair of supporting leg parts 22, 22 at the position facing the fitting pin 17 with the gap 18 of the sleeve body 21 interposed therebetween. A pressing body 26 provided so as to hold a space 25 (see FIGS. 3 and 4) between the pressing portion 23 and the outer peripheral surface of the female side end portion 14 by connecting and integrating the portions 24 and 24 respectively. It is constituted by.

  Then, by pressing the pressing portion 23 toward the outer peripheral surface of the female side end portion 14 in the Y direction and pushing the sleeve body 21 toward the fitting pin 17 side, the fitting pin 17 is moved radially outward, The locking state of the fitting pin 17 to the male protrusion engaging hole 15 can be released (see FIG. 4B).

  Further, according to the present embodiment, the sleeve member 19 is connected to the axial direction X and covers the auxiliary sleeve 28 that covers the overlapping seam portion 27 (see FIG. 4) of the male end portion 13 and the female end portion 14. Are integrally joined.

  The cylindrical pipes 11 and 12 are metal (aluminum) pipe members each having a circular hollow cross section. The male side end 13 of one cylindrical pipe 11 is reduced in diameter, and the reduced male side end 13 is the tip opening 30 of the female side end 14 of the other cylindrical pipe 12 (see FIG. 4). ) To form a double-structured connecting portion 31 in which the male end 13 of one cylindrical pipe 11 and the female end 14 of the other cylindrical pipe 12 overlap each other in close contact.

  The male side end 13 of one cylindrical pipe 11 has its outer peripheral surface once reduced in diameter as a steep slope 32 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 30 until the steep slope 32 abuts the edge of the tip opening 30. In 31, the male side end 13 and the female side end 14 can be easily brought into close contact with each other.

  Further, in the state where the male end 13 is inserted into the female end 14 until the steep slope portion 32 abuts against the edge of the tip opening 30, the circular male protrusion engagement hole 15 has a circular shape with the same diameter. The male side protrusion engaging hole 15 is formed at a position that matches the female side protrusion engaging hole 16. Note that, on the outer peripheral surface of the male side end portion 13, a linear protrusion guide groove 33 is formed along the axial direction X from the edge of the male side end portion 13 to the male side protrusion engagement hole 15. (See FIG. 1). The protrusion guide groove 33 is inserted into the female-side protrusion engagement hole 16 when the male-side end 13 is inserted into the distal end opening 30 of the female-side end 14 to which the sleeve member 19 is attached, and the female-side end 14 is inserted. The fitting pin 17 projecting inwardly is slidably guided to the male-side protrusion engaging hole 15 while locking the guide rib 35 provided on the front end surface thereof.

  The sleeve member 19 is an annular member made of, for example, an elastically deformable synthetic resin (plastic), and includes a sleeve main body 21 that is an arc-shaped portion, and a pressing body 26 that is an arc-shaped portion having a smaller curvature than the sleeve main body 21. Has an integrated shape. The sleeve body 21 has an inner diameter of the arc-shaped cross section that matches the outer diameter of the female side end portion 14, and extends in the circumferential direction on both sides of the position where the fitting pin 17 protrudes. In other words, the sleeve main body 21 is closely disposed along the outer peripheral surface of the female side end portion 14 in a region exceeding the arc length obtained by adding at least the protruding length of the fitting pin 17 to the semicircle, Between 20 and 20, an angular region of less than 180 degrees, preferably 100 to 140 degrees in the circumferential direction is cut away, and a gap 18 is left.

  Thus, when the sleeve body 21 is pressed toward the fitting pin 17 by pressing the pressing body 26, the sleeve body 21 rides along the outer peripheral surface of the female end 14 while expanding the gap 18 by elastic deformation. The center portion from which the fitting pin 17 protrudes into the male-side protrusion engagement hole 15 of the fitting pin 17 without detaching both end portions 20 and 20 from the outer peripheral surface of the female-side end portion 14. It can be moved radially outward until the locked state is released. Further, when the pressing to the pressing body 26 is released, the sleeve body 21 is connected to the fitting pin 17 along the outer peripheral surface of the female side end portion 14 by the urging force that the expanded gap 18 tries to return to the original state. It slides and moves to the side which leaves | separates, and returns to the state which protruded the front-end | tip part of the fitting pin 17 from the internal peripheral surface of the female side edge part 14.

  In the pressing body 26, a pressing portion 23 located at the center portion of the arc-shaped cross section is supported by support legs 22, 22 on both sides, whereby the female side on which the sleeve member 19 is mounted is placed inside the pressing portion 23. A space 25 is formed between the outer peripheral surface of the end portion 14 and at least a space exceeding the protruding length of the fitting pin 17 from the inner peripheral surface of the female side end portion 14. By pressing the pressing body 26, this pressing force is transmitted to both end portions 20, 20 of the sleeve body 21 integrally connected via the support leg portions 22, 22, and the sleeve body 21 is fitted to the fitting pin 17. Can be pushed to the side. When the pressing portion 23 is pressed until it comes into close contact with the outer peripheral surface of the female side end portion 14, the distal end portion of the fitting pin 17 is extracted from the male side protrusion engaging hole 15, thereby the male side end portion 13 is moved to the female side. It can be pulled out from the side end 14 and disassembled.

The auxiliary sleeve 28 integrally joined to the sleeve member 21 has the same cross-sectional shape as the sleeve member 19 and is connected and integrated with the end surface of the sleeve main body 21 on one cylindrical pipe 11 side (the connecting portion is indicated by a broken line). Show). The auxiliary sleeve 28 is disposed so as to cover the overlapping seam portion 27 that becomes the step portion when the male side end portion 13 is inserted into the female side end portion 14 to form the connecting portion 31. The cosmetics of the connection part 31 can be improved. Further, a guide band 34 is provided on the outer peripheral surface of the auxiliary sleeve 28 at a position facing the slit 29 on the extension of the fitting pin 17 in the axial direction X, and the male end 13 is provided on the guide band 34 . The male side end portion 13 can be smoothly inserted into the female side end portion 14 while the protrusion guide groove 33 is aligned.

  And according to the connection structure 10 of this embodiment, a pair of cylindrical pipes 11 and 12 can be easily connected and integrated in the axial direction X by the following simple operations. That is, the sleeve member 21 and the auxiliary sleeve 28 integrated with the sleeve member 21 are mounted, and the distal end portion of the fitting pin 17 protrudes inward from the inner peripheral surface via the female projection engaging hole 16. 14, the male side end 13 is inserted through the tip opening 30 while being aligned by the projection guide groove 33 and the guide band 34. By this insertion, after the front end edge of the male side end portion 13 abuts on the fitting pin 17 protruding inward, the guide rib 35 of the fitting pin 17 expands the sleeve member 21 into the protrusion guide groove 33. As a result, the fitting pin 17 slides along the projection guide groove 33. When the steep slope portion 32 of the male side end portion 13 is inserted until it abuts against the edge portion of the tip opening 30, and the connecting portion 31 is formed in which the male side end portion 13 and the female side end portion 14 are in close contact with each other, the male side The projection engaging hole 15 and the female side projection engaging hole 16 are matched, and the fitting pin 17 is pushed down by the elastic biasing force of the expanded sleeve member 21 to be fitted and locked into the male side projection engaging hole 15. . As a result, the pair of cylindrical pipes 11 and 12 are firmly and easily connected and integrated in the axial direction X (see FIG. 4A).

  Moreover, according to the connection structure 10 of this embodiment, the cylindrical pipes 11 and 12 connected and integrated by the following simple operations can be easily disassembled. That is, if the pressing portion 23 of the sleeve member 21 attached so as to cover the connecting portion 31 is pressed toward the fitting pin 17 until it comes into close contact with the outer peripheral surface of the female side end portion 14, the central portion from which the fitting pin 17 protrudes. Since the engagement state of the fitting pin 17 to the male projection engaging hole 15 is released by moving radially outward, the male end 13 is smoothly pulled out from the female end 14, The pair of cylindrical pipes 11 and 12 can be easily disassembled. Further, by pressing the pressing portion 23 until it comes into close contact with the outer peripheral surface of the female side end portion 14, the distal end portion of the fitting pin 17 can be reliably extracted from the male side protrusion engaging hole 15. It is possible to effectively prevent the male side end 13 from being accidentally pulled out without pulling out 17 from the male side protrusion engaging hole 15.

  Therefore, according to this embodiment, the engagement state of the fitting pin 17 locked to the matched engagement holes 15, 16 is easily released, and the pair of cylindrical pipes 11, which are connected and integrated, 12 can be disassembled smoothly, and breakage of the fitting pin 17 can be effectively avoided.

  Moreover, according to this embodiment, the connection part 31 has the male side end part 13 of one cylindrical pipe 11 and the female side end part 14 of the other cylindrical pipe 12 closely arranged with a considerable length. Since it is equipped with a double structure, even when a large bending stress is applied to the connecting part 31 when using a cleaning tool, the bending stress can be sufficiently supported by the double structure lap part. It is possible to effectively avoid loosening and breakage of the portion 31. In particular, since the cylindrical pipes 11 and 12 are metal pipe members, they can exhibit a stronger support force against bending stress.

  FIG. 5 shows a pipe connection structure 40 according to another embodiment of the present invention. While the connection structure 40 shown in FIG. 5 has substantially the same configuration as the pipe connection structure 10, the sleeve main body 42 and the pressing body 43 constituting the sleeve member 41 are separate members. And the front-end | tip part of the support leg parts 44 and 44 of the press body 43 was latched by the both-ends parts 45 and 45 of the sleeve main body 42 so that the clearance gap 47 between the edge parts 46 and 46 of the sleeve main body 42 could be expanded. Contact connection in the state.

  That is, the distal end portions of the support leg portions 44, 44 of the pressing body 43 are bent outward in an L shape, and the bent portions 48, 48 are the inner peripheral surface and the female side end of the both end portions 45, 45 of the sleeve body 42. The tip 14 'is inserted into and locked in the gap with the outer peripheral surface of the portion 14', and its tip abuts against the pressing protrusions 49, 49 projecting inward from the inner peripheral surface of the both end portions 45, 45, respectively. The pressing protrusions 49, 49 can be pushed outward along the outer peripheral surface of the female side end portion 14 ′ by the pressing force, so that the gap 47 between the end portions 46, 46 of the sleeve main body 42 can be expanded. Yes. A notch groove 38 is formed in an arc shape on the outer peripheral surface of the portion on the opposite side of the knife-side projection engaging hole 16 of the knife-side end portion 14 ′, and along the notch groove 38. The pressing protrusions 49 are arranged to be slidable. Further, the connection of the support leg portions 44, 44 of the pressing body 43 to the both end portions 45, 45 of the sleeve main body 42 includes not only the connection integration but also the connection in the contact state as described above. It is.

  Then, even with the pipe connection structure 40 of this embodiment, if the pressing portion 39 holding the space 25 on the inner side is pressed toward the fitting pin 17 until it is in close contact with the outer peripheral surface of the female side end portion 14 ′, the fitting is achieved. The locking state of the joint pin 17 to the male side protrusion engaging hole 15 is released, and the effects similar to those of the above-described embodiment are achieved.

  6 (a) and 6 (b) show another form of the sleeve member used in the pipe connection structure of the present invention. According to the sleeve member 60 of FIGS. 6A and 6B, the pressing body 62 has both edge portions 64, 64 of the sleeve main body 61 via the pin joint portion 69 at the center of the tip of each support portion 63, 63. And the convex curved surfaces 70, 70 at the front end sides of the support portions 63, 63 are brought into contact with the concave curved surfaces 65, 65 at both end edges 64, 64 of the sleeve body 61, respectively. Each is connected to the sleeve body 61 in a state. The pressing body 62 has an arc-shaped cross section having a smaller curvature than the outer peripheral surface of the female side end portion 14 ″, and is supported by support portions 63 and 63 on both sides connected to both end edges 64 and 64 of the sleeve body 61. The space 66 is held between the central pressing portion 71 and the outer peripheral surface of the female side end portion 14 ″. In addition, a guide protrusion 67 is provided at the inner center of the pressing portion 71 so as to protrude inwardly and extend in the axial direction of the sleeve member 60, and on the outer peripheral surface of the knife-side end portion 14 ″ A guide concave groove 68 is formed on the side opposite to the side protrusion engaging hole, into which the guide protrusion 67 is inserted and locked when the pressing portion 71 is pressed.

  Even when such a sleeve member 60 is used, if the pressing portion 71 holding the space 66 on the inner side is pressed toward the fitting pin 17 'side until it comes into close contact with the outer peripheral surface of the female side end portion 14 ", the fitting is achieved. The locking state of the pin 17 ′ in the male protrusion engagement hole is easily released, and the guide protrusion 67 is inserted and locked into the guide groove 68 when the pressing portion 71 is pressed. Therefore, the disassembly work can be performed in a more stable state.

  FIG. 7 shows still another embodiment of the sleeve member used in the pipe connection structure of the present invention. According to the sleeve member 80 of FIG. 7, a substantially half portion of the sleeve member 80 on the side from which the fitting pin 17 ″ protrudes from the inner peripheral surface constitutes the sleeve body 81, and both ends of the sleeve body 81 in the circumferential direction A gap 83 is formed between 82 and 82. Further, at a position facing the fitting pin 17 ", a pressing body 84 is provided so as to protrude to the outside of the sleeve member 80, and a supporting leg of the pressing body 84 is provided. Portions 85 and 85 are connected and integrated with both ends 82 and 82 of the sleeve body 81. Further, a slit 86 is formed over the entire length of the sleeve member 80 at a position crossing the center of the pressing body 84, and the sleeve member 80 can be expanded in diameter by increasing the width of the slit 86. It has become. Also by the sleeve member 80, a space is maintained between the pressing portion 87 of the pressing body 84 and the outer peripheral surface of the female side end portion. By pressing the pressing portion 87, substantially the same as in the above-described embodiment. It becomes possible to produce an effect.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the sleeve member does not necessarily have to be an integrally joined auxiliary sleeve. Further, the present invention is not limited to the handle of the cleaning tool, but is a cylinder in various other long rod-like members formed by connecting and integrating a plurality of cylindrical pipes in the axial direction, such as a handle handle. It can be employed as a connecting structure for pipes.

It is a disassembled perspective view explaining the connection structure of the pipe which concerns on one Embodiment of this invention. It is the perspective view which looked at the sleeve member shown in FIG. 1 from diagonally downward. It is a cross-sectional view along AA of FIG. 4A for explaining a pipe connection structure according to an embodiment of the present invention. (A) is a longitudinal cross-sectional view taken along the line BB in FIG. 3 for explaining a state in which a pair of cylindrical pipes are connected and integrated, and (b) is a view for explaining a state in which the pair of cylindrical pipes are disassembled. 3 is a longitudinal sectional view taken along line BB in FIG. It is a cross-sectional view explaining the connection structure of the pipe which concerns on other embodiment of this invention. (A) The perspective view which shows the other form of the sleeve member used for the connection structure of the pipe of this invention, (b) is sectional drawing along CC of (a). It is a perspective view which shows the further another form of the sleeve member used for the connection structure of the pipe of this invention. It is a perspective view which shows the cleaning tool provided with the connection structure of the conventional pipe.

Explanation of symbols

10, 40 Pipe connection structure 11 One cylindrical pipe 12 The other cylindrical pipe 13 Male side end 14, 14 ', 14 "Female side end 15 Male side projection engagement hole 16 Female side projection engagement hole 17 Mating pin (engagement protrusion)
18, 47 Clearance 19, 41, 60, 80 Sleeve member 20, 46 Both ends 21, 42, 61, 81 Sleeve body 22, 44 Support leg (support)
23, 39, 71 Pressing portions 24, 45 Both end portions 25 Spaces 26, 43, 62, 84 Pressing bodies 27 Overlapping seam portion 28 Auxiliary sleeve 30 Tip opening 31 Connection portion 48 Bending portion 49 Pressing protrusion 63 Supporting portion 69 Pin joint portion

Claims (4)

Insert the male end of one cylindrical pipe into the female end of the other cylindrical pipe, match the male projection engagement hole with the female projection engagement hole, and insert the engagement projection from the inner peripheral surface. A pipe connection structure in which the protruding sleeve member is attached from the outside, and the pair of cylindrical pipes are connected and integrated in the axial direction by engaging the engagement protrusions with the engagement holes. There,
The sleeve member extends on both sides of the engagement protrusion along the outer peripheral surface of the female side end, and is closely attached to the outer peripheral surface in a region exceeding a semicircle while leaving a gap between both ends in the circumferential direction. A sleeve body and a pressing part supported on both sides by a support part, and connecting the tip end part of the support part to both end portions of the sleeve body at a position facing the engaging projection, And a pressing body provided to hold a space between the outer peripheral surface of the female side end,
A pipe connection structure that releases the locking state of the engagement protrusion to the male protrusion engagement hole by pressing the pressing portion and pushing the sleeve body toward the engagement protrusion.   The pipe connection structure according to claim 1, wherein an auxiliary sleeve that covers the overlapping seam portion of the male end and the female end is connected to the sleeve member in an axial direction and integrally joined thereto.   The sleeve main body and the pressing body constituting the sleeve member are made of different members, and the distal end portion of the support portion of the pressing body is engaged with both end portions of the sleeve main body so that a gap between the end portions can be expanded. The pipe connection structure according to claim 1 or 2, wherein   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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