JP5171264B2 - Pipe material connecting structure and pipe furniture connecting structure - Google Patents

Description

  The present invention relates to a pipe material connection structure, and relates to an assembly furniture such as a clothesliner provided with the connection structure.

  Generally, there is a clothes drying tool as assembly furniture formed by connecting a pipe material and a connected member. In this clothes drying tool, in order to attach the pipe material to a joint as a connected member, the pipe material is inserted into an insertion hole having an inner diameter substantially the same as the outer diameter of the pipe material formed in the joint, There are a method of screwing a screw inward from a screw hole formed on the outer side surface and pressing the side surface of the pipe material with the tip of the screw, a method of penetrating the screw into the pipe material after performing the same work, etc. It has been implemented. In these operations, the pipe material cannot be fixed unless a suitable force is applied. In any of the above methods, the pipe material is not formed with screws for screws or the like, so that the pipe material may be loosened depending on the screw mounting method. Therefore, in order to solve this problem, a connection structure using bolts and nuts has been proposed (for example, see Patent Document 1).

This connection structure is a connection structure comprising a first pipe, a second pipe inserted therein, and a bolt / nut connection, and a hole in the direction perpendicular to the axial center is provided through the second pipe. The first pipe member has a large hole larger in diameter than the bolt head and a small hole through which the bolt screw portion is inserted, respectively, penetrating in the direction perpendicular to the axial center. Two pipe members are pressed and the second pipe member is configured to be tightened to the inner surface side of the first pipe member having the small holes. The first pipe material and the second pipe material can be connected relatively easily only by being fastened, and slack is hardly generated.
Japanese National Utility Model Publication No. 5-13390

  However, the connection structure has the following problems. That is, in this mounting structure, when two pipe members are connected, the bolts must be passed through the holes while maintaining the positions of the holes formed in the two pipe members. The problem was that the work was complicated when there was one person. Also, if the bolts and nuts are removed, the two pipe materials can be easily disassembled, but the bolts and nuts may be lost during the next assembly. Due to the limitations, it took time to obtain alternative bolts and nuts.

In addition, when assembling by connecting pipe materials such as those described above, the problem is that if the assembly work is performed alone, the work becomes complicated and it takes time to obtain a replacement when the component is lost. This is a problem common not only to clothes-drying equipment, but also to all assembly furniture that connects and assembles pipe members and connected members.

  Accordingly, the present invention has been made in view of the above-described conventional problems, and when assembling the assembly furniture, the connection operation of the pipe materials constituting the assembly furniture is easy, and the connection structure of the pipe materials that can shorten the assembly time. It is another object of the present invention to provide an assembly furniture including the connection structure.

The present invention has been made to solve the above problems, and a pipe material connection structure according to the present invention is a pipe material connection structure for connecting a pipe material to a connected member. The engaging member is provided with an insertion hole into which the engaging member attached to the pipe member is detachably inserted. The outer surface of the engaging member is movable inward and outward, and outward. An engagement protrusion biased toward the engagement protrusion is provided, a locking hole engageable with the engagement protrusion is formed in the wall surface of the insertion hole, and the engagement protrusion is provided on the outer surface of the engagement member. A guide rib or a guide groove is formed along the insertion direction at a position different from the engagement protrusion in the outer circumferential direction, and the guide groove or the guide rib engaging with the guide rib or the guide groove is the position of the insertion hole. Along the wall along the depth direction It made that the guide rib or guide groove of the engagement member, in a state in which the guide groove or guide rib is engaged in the wall surface of the insertion hole, the engaging projection is engaged with the engaging hole, characterized in Rukoto.

  In the pipe material connecting structure having the above structure, when the pipe material and the connected member are connected, the engaging member attached to the tip of the pipe material is inserted into the insertion hole of the connected member. At that time, since the engaging protrusion engages with the locking hole, the pipe material can be easily connected to the connected member, and since the engaging protrusion engages with the locking hole, the pipe material is connected. The state connected to the member can be maintained. Therefore, there is no need for fastening members such as bolts and nuts, so the number of parts can be reduced, and there is less risk of parts being lost during parts movement or storage even after the pipe material is disassembled from the connected parts. Become.

Further, when inserting the engaging member into the insertion hole, so automatically engaging projection that is engaged with the guide grooves or guide ribs of the insertion hole of the guide rib or guide groove of the engaging member engages the engaging hole Alignment in the rotation direction between the engaging protrusion and the locking hole is unnecessary, and the attaching operation of the engaging member to the insertion hole can be performed reliably. Further, after the mounting, the rotation of the engaging member is regulated by the guide rib and the guide groove, so that the engaging member is not rotated unnecessarily, and the engaging member is displaced in the rotation direction and is engaged with the locking hole of the insertion hole. The engagement of the member with the engagement protrusion is not released. Therefore, the pipe material can be more reliably connected by the connected member.

  Moreover, it is preferable that the inclined surface is formed in the front-end | tip part of each of a guide rib and a guide groove. An inclined surface is formed at the tip of each of the guide rib and the guide groove. Therefore, when the engaging member is inserted into the insertion hole, the inclined surface is not aligned even when the engaging position is slightly shifted. It becomes a guide and can be inserted smoothly.

  Furthermore, it is preferable that the locking hole penetrates the wall surface of the insertion hole of the connected member. Since the locking hole penetrates the wall surface of the insertion hole of the connected member, when the pipe member is removed from the connected member, it engages from the outside of the locking hole that penetrates the insertion hole of the connected member. When the protrusion is pressed inward, the engagement between the engaging protrusion and the locking hole is released. Furthermore, if the pipe material is pulled out of the connected member in a disengaged state, the connection between the pipe material and the connected member can be easily released.

  Furthermore, the engagement member is formed with an engagement piece extending in the insertion direction through a gap between the engagement portion, an engagement protrusion is formed on the outer surface on the distal end side of the engagement piece, and the engagement piece It is preferable that the engaging protrusion can be moved inward and outward by bending with the base end of the base end as a fulcrum. When the pipe member is connected to the connected member, the engaging protrusion comes into contact with the wall surface of the insertion hole of the connected member, and the engaging protrusion is bent inward with the base end of the engaging piece as a fulcrum. When the engaging protrusion moves to the position of the locking hole on the side wall of the insertion hole in this state, the pressing force due to the contact of the wall surface is released, and the engaging protrusion engages with the locking hole. Further, when the engagement protrusion is pressed inward when the pipe material is removed from the connected member, the engagement piece bends inward with the base end as a fulcrum, and the engagement protrusion and the locking hole The engagement is released, and the pipe material can be easily detached from the connected member.

  Furthermore, the assembly furniture according to the present invention is characterized by including the above-described pipe material connection structure. Since the assembly furniture has the above-mentioned pipe material connection structure, even one person does not become complicated when assembling and disassembling the assembly furniture. In addition, since assembly parts such as bolts and nuts are not used, parts management when disassembled is facilitated, and problems such as loss of parts are reduced.

  Thus, in the assembly furniture provided with the pipe connection structure according to the present invention, the engagement member attached to the distal end portion of the pipe material is provided, and the engagement member attached to the pipe material is provided in the connected member. An insertion hole that is detachably inserted is provided, and an engagement protrusion that is movable inward and outward and biased outward is provided on the outer surface of the engagement member, and can be engaged with the engagement protrusion. Since a simple locking hole is formed in the wall surface of the insertion hole, when assembling the assembly furniture, it is easy to connect the pipe materials constituting the assembly furniture, and the pipe materials can be connected to shorten the assembly time. There exists an effect of providing the assembly furniture provided with the structure and its connection structure.

It is sectional drawing which shows one Embodiment in the connection structure of the pipe material which concerns on this invention. It is a side view of the engaging member of FIG. It is a top view of the engaging member of FIG. It is sectional drawing of the coupling of FIG. It is a reverse view of the coupling of FIG. It is a front view which shows the other form of implementation in the connection structure of the pipe material which concerns on this invention. It is a front view which shows another form of implementation in the connection structure of the pipe material which concerns on this invention. It is a perspective view which shows one Embodiment of the clothes drying tool which concerns on this invention. It is a perspective view which shows another form in implementation of the clothes drying tool which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st pipe material 2 2nd pipe material 3 Engagement member 4 Joint 6 Leg 7 Dry member 8 Leg member 9 Dry member 11 Leg pipe material 12 Support pipe material 13 Connection pipe material 14 Support pipe material DESCRIPTION OF SYMBOLS 15 Connection pipe material 16 Drying pipe material 17 Connection pipe material 1a Tip 21 Drying pipe material 31 Engagement protrusion 32 Base 33 Engagement piece 34 Notch surface 35 Fixing part 36 Connection part 37 Notch part 38 Arc surface 39 Clearance 3a outer surface 40 arc surface 41 insertion hole 42 insertion hole 43 locking hole 44 wall surface 45 support piece 46 inclined surface 47 joint 48 joint 51 inclined surface 61 leg 62 leg 81 cylindrical body 82 cylindrical body 91 base body 92 cylindrical body 93 cylindrical body 32a Lower surface 34a Tip 45a Tip 47a Connecting part

  Next, the best mode for carrying out the present invention will be specifically described with reference to the drawings.

  1 is a cross-sectional view showing an embodiment of the pipe material connection structure according to the present invention, FIG. 2 is a side view of the engaging member 3 in FIG. 1, and FIG. 3 is an upper surface of the engaging member 3 in FIG. 4 is a cross-sectional view of the joint 4 as a connected member in FIG. 1, FIG. 5 is a rear view of the joint 4 in FIG. 1, and FIG. 6 is another embodiment implemented in the pipe material connection structure according to the present invention. FIG. 7 is a front view showing another embodiment of the pipe material connection structure according to the present invention, FIG. 8 is a perspective view showing one embodiment of the clothesliner according to the present invention, and FIG. It is a perspective view which shows another form in implementation of the clothes drying tool which concerns on invention.

  In the drawings, 1 and 2 are a first pipe member 1 and a second pipe member 2 to be connected, 3 is an engaging member attached to the tip of the first pipe member 1, and 4 is a second member. It is a joint in which the engaging member 3 is detachably inserted. The pipe material connection structure according to this embodiment is such that the first pipe material 1 is connected to a joint 4 as a connected member by a specific connection structure.

  First, in the pipe material connection structure shown in FIG. 1, the engagement member 3 is attached to the tip 1 a of the first pipe material 1, and the engagement member 3 is inserted into the T-shaped joint 4. And an insertion hole 42 through which the second pipe member 2 is inserted in a penetrating state perpendicular to the insertion hole 41, and the engagement member 3 is inserted into the insertion hole 41 of the joint 4. In addition to the insertion, the engagement protrusion 31 formed on the engagement member 3 is engaged with the engagement hole 43 penetrating the side wall 44 of the insertion hole 41, and the second pipe member 2 is inserted into the insertion hole 42 of the joint 4. The first pipe member 1 and the second pipe member 2 are connected in an orthogonal state.

  In order to connect the first pipe member 1 and the second pipe member 2 in series, the second pipe member 2 is inserted in series with the insertion hole 41 as shown in FIG. A joint 4 in which the insertion hole 42 is formed may be used. When three pipe members are connected in a Y shape, a joint having two insertion holes 42 corresponding to the connecting direction may be used, and in the same manner, four or more pipe members are connected. It can also be done.

  Moreover, in the said form, although the insertion hole 41 in which the engaging member 3 formed in the coupling 4 is inserted, and the insertion hole 42 in which the 2nd pipe material 2 is penetrated are provided, it is shown by FIG. Like the joint 48, the engagement member 3 may be attached to the tip of the second pipe member 2, and an insertion hole 41 into which the engagement member 3 is inserted may be provided instead of the insertion hole 42. . That is, a structure including the engaging protrusion 31 and the locking hole 43 may be provided at both ends of the joint 48, and the two pipe members may be connected to the joint 48 as a connected member.

  In this embodiment, the pipe materials 1 and 2 to be connected are generally made of a metal such as stainless steel, steel, or aluminum in the shape of a pipe. A material coated with a synthetic resin or the like can be appropriately used depending on the required length and strength.

  The engaging member 3 and the joint 4 according to this embodiment will be described in more detail.

  That is, as shown in FIGS. 1 to 3, the engaging member 3 includes a disk-shaped base portion 32 having substantially the same shape as the outer diameter of the first pipe member 1, and an engaging piece 33 having an engaging protrusion 31. And an outer diameter that is substantially the same as the inner diameter of the first pipe member 1 from the lower surface 32a of the base portion 32, and is fitted into the first pipe member 1. A cylindrical connecting portion 36 is formed. And the terminal angle of this connection part 36 is notched diagonally, and the notch part 37 is formed. For this reason, it is made easy to insert into the first pipe material 1. Further, the engagement piece 33 and the fixing portion 35 extend from the base portion 32 in the length direction of the first pipe material 1.

Then, the form of the engagement piece 33 and the fixing | fixed part 35 is demonstrated. That is, the cylindrical outer surface 3a that protrudes from the base 32 of the engaging member 3 and is formed to have approximately the same diameter as the inner diameter of the insertion hole 41 of the joint 4 has two side surfaces cut out as guide grooves facing each other. A notch surface 34 is formed, and the remaining side surfaces are formed as two arc surfaces 38 and 40 that come into contact with the wall surface 44 of the insertion hole 41 of the joint 4, and the engagement protrusion 31 is formed on one arc surface 38. At the same time, the gap 39 formed between the two arcuate surfaces 38, 40 makes the arcuate surface side having the engaging projection 31 become the engaging piece 33, and the other arcuate surface 40 is provided on the side surface. The side having the two notch surfaces 34 is a fixed portion 35.

In this embodiment, the engaging protrusion 31 is formed only on one of the two arcuate surfaces 38 and 40, but the engaging protrusion 31 is formed on both of the two arcuate surfaces 38 and 40, and Accordingly, two gaps 39 may be formed. In this case, the number of the locking holes 43 penetrating through the side wall 44 of the insertion hole 41 of the joint 4 may be one, but the two are more firmly attached to the engaging member 3 and the joint 4.

Next, the engaging piece 33 is provided with a cylindrical engaging protrusion 31 projecting from the distal end side of the arcuate surface 38 which is the outer surface of the engaging piece 33, and the arcuate surface 38 is an insertion hole of the joint 4. It is made to contact | abut to the wall surface 44 of 41. FIG. Further, a fixed portion 35 is provided side by side with a gap 39 on the back side of the arc surface 38. When the engagement member 3 is inserted into the insertion hole 41 of the joint 4, the engagement member 3 is inserted while the top of the engagement protrusion 31 is in contact with the wall surface 44 of the insertion hole 41. However, a gap 39 having a width sufficient to allow the engagement piece 33 to be bent inward is formed. With this, the engagement member 3 is bent while the engagement piece 33 is bent. When inserted into the insertion hole 41 and the engagement protrusion 31 engages with the locking hole 43 of the insertion hole 41, the bending of the engagement piece 33 is eliminated and the engagement piece 33 contacts the wall surface 44 of the insertion hole 41. The engaging member 3 is attached to the joint 4 in contact.

The fixing portion 35 has a gap 39 formed on the engaging piece 33 side, and an arc surface 40 is formed on the opposite surface of the fixing portion 35 in the same manner as the engaging piece 33, and is in contact with the wall surface 44 of the insertion hole 41. On both side surfaces of the two surfaces, a notch surface 34 as a guide groove is formed substantially perpendicular to the base portion 32, and the two notch surfaces 34 are two guide ribs formed on the wall surface 44 of the insertion hole 41. The support pieces 45 are in contact with each other. As a result, when the engaging member 3 is inserted into the insertion hole 41 of the joint 4, the positions of the fixing portion 35 and the support piece 45 are aligned, and if the engaging member 3 is inserted, the notch surface 34 and the support piece 45 are aligned. A guide groove and a guide rib for engagement are formed, and the engagement protrusion 31 of the engagement piece 33 is reliably engaged with the engagement hole 43 of the side wall 44 of the insertion hole 41. Incomplete mounting is less likely to occur.

In addition, an inclined surface 51 is formed at the distal end portion 34 a of the notch surface 34, and a similar inclined surface 46 is formed at the distal end portion 45 a on the opening side of the support piece 45. As a result, when the engaging member 3 is inserted into the joint 4, even if there is a slight shift in the direction between the notch surface 34 of the fixing portion 35 and the support piece 45, the direction shift is corrected by the inclined surfaces 46 and 51. Then, the notch surface 34 comes into contact with the support piece 45, and the operator can attach the engaging member 3 to the joint 4 without fine adjustment of the position. Further, since the rotation of the attached engagement member 3 is restricted by the support piece 45, it does not rotate unnecessarily, and the engagement state between the engagement protrusion 31 and the engagement hole 43 is not easily canceled. Has been made.

In general, the engaging member 3 is formed by molding a synthetic resin such as polypropylene, polyamide, polyacetal, or ABS resin so that the base 32, the engaging piece 33 having the engaging protrusion 31, the fixing portion 35, and the connecting portion 36 are provided. Although it is formed integrally, other resins can be used as appropriate as long as they have elasticity, slipperiness, strength, and the like that are required when engaging with the joint 4.

1, 4, and 5, the joint 4 has an insertion hole 41 into which the engagement member 3 is inserted, and a circular locking hole 43 is formed on the side wall 44 of the insertion hole 41. It is formed so as to penetrate and engage with an engagement protrusion 31 formed on the engagement piece 33 of the engagement member 3. Further, a support piece 45 is formed on the wall surface 44 of the insertion hole 41 so as to face the locking hole 43 in a direction perpendicular to the locking hole 43 so as to come into contact with the notch surface 34 of the fixing portion 35 of the engagement member 3. ing. In this embodiment, three support pieces 45 are arranged in parallel in the depth direction of the insertion hole 41. As a result, even if the engagement member 3 or the joint 4 expands or contracts due to a change in temperature or the like, and an excessive pressing force is generated between the notch surface 34 and the support piece 45, the support piece 45 Can bend perpendicularly to the length direction to prevent problems such as deformation and breakage. Note that the number of the support pieces 45 is not limited to this embodiment, and may be one or more.

The joint 4 is generally formed integrally by molding a synthetic resin such as polypropylene, polyamide, polyacetal, ABS resin, etc., but the elasticity required to engage with the support member, Other resins can be used as appropriate as long as they have slipperiness and strength.

In this embodiment, the engaging protrusion 31 of the engaging member 3 is formed on the engaging piece 33. However, if the engaging protrusion 31 is engaged with the locking hole 43 of the connected member 4, other forms are also possible. Good. For example, even if the engagement member 3 is formed with a spring insertion hole in the diameter direction of the pipe member 1 and an engagement projection 31 having a coil spring attached to the spring insertion hole is used, The same effect can be obtained.

The pipe material connection structure according to the above-described embodiment is as described above. Next, FIG. 8 shows a clothes drying tool provided with the connection structure. The clothesliner shown in FIG. 8 is provided with a pair of left and right legs 6 including legs 61 and legs 62 connected in an X shape when viewed from the left-right direction. A pipe member 13 for connecting the legs 62 is connected to the inner legs 62 of the two legs constituting the pair of left and right legs 6 in a horizontal state at the center in the longitudinal direction of the legs 62. A drying member 7 for drying towels and the like is attached. Furthermore, the clothes-drying pipe material 21 is connected to the front sides of the pair of left and right legs 6 in a horizontal state, and the clothes-drying pipe material 21 is connected to the rear sides in a horizontal state.

  Further, the leg body 6 including the leg 61 and the leg 62 connected in an X shape has the leg 62 connected to the inside of the leg 61. The leg 61 is continuously integrated by connecting the upper end of the leg pipe member 11 and the lower end of the support pipe member 12 to both ends of a joint 48 as a connected member shown in FIG. It is straight. The leg 62 is continuously integrated by connecting the upper end portion of the leg pipe member 11 and the lower end portion of the support pipe member 12 to the longitudinal direction side of a T-shaped joint 47 as a connected member. Has been in a straight line. In the leg 61 and the leg 62, a joint 48 of the leg 61 and a joint 47 of the leg 62 are rotatably connected with a longitudinal center portion as a fulcrum. In addition, the connecting pipe material 13 that connects the joints 47 is connected in a horizontal state to the joint 47, and a drying member 7 that is used to dry a bath towel or the like is attached. Further, a T-shaped joint 4 as a connected member shown in FIG. 1 is connected to the upper end portion of the leg body 6, and a pipe material for clothes drying made of a single pipe material in the insertion hole 42 of the joint 4. 21 is inserted in a penetrating state.

  Furthermore, the joint 48 in the center of the leg 61 connects two pipe members using the form shown in FIG. 7 in series. The joint 48 includes insertion holes 41 at both ends of the joint 48 for insertion of engagement members attached to the upper end of the leg pipe member 11 and the lower end of the support pipe member 12. The engaging projection provided on the engaging member is engaged with the engaging hole penetrating the wall surface 44 to connect the upper end portion of the leg pipe member 11 and the support pipe member 12 to both ends of the joint 48. The above connection structure is used. Further, the T-shaped joint 47 at the center of the leg 62 is provided with insertion holes 41 at both ends for inserting engaging members instead of the insertion holes 42 of the T-shaped joint 4 shown in FIG. It is. The T-shaped joint 47 also has a structure in which the pipe material is connected in both the longitudinal direction and the orthogonal direction by using the connection structure. Furthermore, the joint 4 that is inserted through the clothesline pipe material 21 in a penetrating state and is connected to the upper end portion of the leg body 6 uses the form shown in FIG. 1, and the connection uses the above-described connection structure. Therefore, the support pipe material 12 is connected to the joint 4 and the clothes-drying pipe material 21 is inserted perpendicularly thereto.

  Next, the clothes drying tool provided with the above-mentioned connection structure is shown in FIG. The clothesliner shown in FIG. 9 is provided with a pair of left and right leg members 8 that are long in the front-rear direction and a support pipe member 14 that is vertically connected to the leg members 8. In this state, both ends of the connecting pipe material 15 are connected. Moreover, the upper end part of the pipe material 14 for support | pillars is connected with the base body 91 with which the drying member 9 for drying a bath towel etc. is equipped.

  The leg member 8 is a member to be connected, and a cylindrical body 81 having an insertion hole 41 for vertically connecting the lower end portion of the support pipe member 14 is provided at the center of the upper surface thereof. A cylinder 82 provided with an insertion hole 41 for connecting both ends of the connecting pipe member 15 in a horizontal state perpendicular to the cylinder 81 is provided.

  Further, the drying member 9 that connects the upper ends of the support pipe members 14 includes a base body 91 that is a pair of left and right longitudinally connected members, and is provided on the side surface of the base body 91 with a space therebetween. Both ends of the dried pipe member 16 are connected to the four insertion holes 41 respectively. In addition, a cylindrical body 92 having an insertion hole 41 to which the upper end portion of the support pipe material 14 is connected is provided at the center of the lower surface of the base body 91, and at the center in the axial direction is orthogonal to the cylindrical body 92 and is used for connection. A cylinder 93 having an insertion hole 41 connected to the pipe material 17 is provided.

  The connection structure for connecting the lower end portion of the support pipe member 14 to the leg member 8 uses the connection structure. The cylindrical body 81 of the leg member 8 includes an insertion hole 41 into which an engagement member attached to the lower end portion of the support pipe member is inserted, and the engagement hole is inserted into the locking hole penetrating the wall surface 44 of the insertion hole 41. The lower end of the support pipe member 14 is connected to the cylindrical body 81 of the leg member 8 by engaging the provided engaging projections. This is because a connecting structure for connecting both ends of the connecting pipe member 15 to the cylinder 82 of the leg member 8 and a connection for connecting the upper end portion of the supporting pipe member 14 to the cylinder 92 of the base body 91 of the drying member 9. A structure for connecting the connecting pipe member 15 to the cylindrical body 93 of the base member 91 of the drying member 9, and a connecting structure for connecting both ends of the pipe member 16 for the drying member to the base member 91 of the drying member 9. The same applies to.

  In addition, although the clothes drying tool was demonstrated in the said embodiment, assembly furniture other than a clothes drying tool may be sufficient. For example, the present invention can be applied to laundry racks, closet storage furniture, kitchen storage furniture, and the like. In any case, the assembly furniture inserts the pipe material in which the engagement member having the engagement protrusion is press-fitted into the tip portion into the insertion hole of the connected member, and at this time, the engagement protrusion of the engagement member is the insertion hole. What is necessary is just to use the said connection structure engaged with the latching hole of the side wall.

  Further, the locking hole 43 may not be penetrated through the insertion hole 41 of the connected members 4, 8, 47, 48, 91. That is, the locking hole 43 may be formed with a recess in which the engagement protrusion 31 engages with the wall surface 44 of the insertion hole 41. In any case, when the engaging member is inserted into the insertion hole, the engaging protrusion that is brought into contact with the wall surface of the insertion hole and bent inward is restored to the outside when it reaches the position of the locking hole. What is necessary is just to be engaged with a stop hole.

  Furthermore, the inclined surfaces 46 and 51 may not be provided at the tip portions 45a and 34a of the support piece 45 of the insertion hole 41 and the cutout surface 34 of the engagement member 3, respectively. In any case, when the engagement member and the insertion hole are inserted, the support protrusion as the guide rib and the notch surface as the guide groove are engaged with each other so that the engagement protrusion and the engagement hole are engaged with each other. By providing an inclined surface, even if the engagement position between the support piece and the notch surface is slightly shifted, the inclined surface can be a guide for alignment of the engagement and can be smoothly inserted.

  Furthermore, the notch surface 34 is provided in the engagement member 3 and the support piece 33 is provided in the insertion hole 41 of the coupled member 4. However, the support piece 33 is provided in the engagement member 3 and the insertion hole 41 of the coupled member 4 is notched. A surface 34 may be provided. Further, not only the engagement between the support piece 33 and the notch surface 34, a guide rib or a guide groove is provided on the outer surface 3 a of the engagement member 3, and the guide groove or the guide rib engaged with the guide rib or the guide groove is inserted into the insertion hole 41. It may be provided on the wall surface 44. In any case, when the engaging member is inserted into the insertion hole, the guide rib and the guide groove are engaged with each other so that the engagement protrusion and the locking hole are aligned in the rotational direction. It is only necessary that unnecessary rotation can be prevented after connecting to the connected member.

  Moreover, although the said embodiment demonstrated the form which press-fits the engagement member 3 inside a pipe material, the engagement member 3 is not restricted to the form which press-fits inside a pipe material, The engagement member 3 is outside the pipe material. It is also possible to press-fit into. In any case, in the pipe material connection, the pipe material may have a structure in which an engagement member having an engagement protrusion is press-fitted into the tip of the pipe material. It is not necessary to form at the front-end | tip part of a pipe material. Furthermore, since the engaging member is only press-fitted into the tip end portion of the pipe material, it is not necessary to provide a specific structure for attaching the engaging member to the pipe material. Therefore, the pipe material can be connected to the connected member simply by being cut into a size suitable for the application and press-fitting an engaging member having an engaging protrusion at the tip.

Claims (5)

In the pipe material connection structure for connecting the pipe material (1, 11, 12, 13, 14, 15, 16, 17) to the connected member (4, 8, 47, 48, 91), the pipe material (1 11, 11, 12, 13, 14, 15, 16, 17) are provided with an engaging member (3) attached to the tip (1 a), and the connected members (4, 8, 47, 48, 91) are pipes An insertion hole (41) into which an engaging member (3) attached to the material (1, 11, 12, 13, 14, 15, 16, 17) is detachably inserted is provided, and the engaging member (3) The outer side surface (3a) is provided with an engaging projection (31) that is movable inward and outward and biased outward, and a locking hole (43) that can be engaged with the engaging projection (31). Is formed on the wall surface (44) of the insertion hole (41) ,
The position of the side surface of the outer surface (3a) of the engagement member (3) with respect to the surface on which the engagement protrusion (31) is provided, in a position different from the engagement protrusion (31) in the outer circumferential direction, in the insertion direction. A guide rib (45) or a guide groove (34) is formed along the guide rib (45) or the guide groove (34). 44) along the depth direction, the guide rib (45) or guide groove (34) of the engaging member (3), and the guide groove (34) or guide rib (34) of the wall surface (44) of the insertion hole (41). in a state where 45) and are engaged, the coupling structure of the pipe the engaging projection (31) is characterized by Rukoto engaged with the locking hole (43). Coupling structure according to claim 1, wherein the pipe member to each of the tip portions (34a, 45a), characterized in that the inclined surfaces (46 and 51) is formed of the guide rib (45) and guide grooves (34). Locking hole (43), any claim 1-2, characterized in that extending through the wall (44) of the insertion hole of the connecting member (4,8,47,48,91) (41) The connection structure of the pipe material of crab. The engaging member (3) is formed with an engaging piece (33) extending in the insertion direction through a gap (39) between the engaging piece (33) and the fixed portion (35), and an outer surface on the distal end side of the engaging piece (33). An engagement protrusion (31) is formed on (38), and the engagement protrusion (31) is movable inward and outward by bending with the base end of the engagement piece (33) as a fulcrum. The pipe material connection structure according to any one of 1 to 3 . The assembly furniture provided with the connection structure of the pipe material in any one of Claims 1-4 .

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