JP3139709U - Connecting member - Google Patents

Abstract

A contact area between an attached member and an end portion of a connecting member to the attached member can be increased, and further, no end portion of the connecting member has burrs.
A first contact receiving surface is formed by a part of a circumferential surface that is recessed toward a second axis. The third axis 11 of the circumferential surface 6 is formed with the included angle A ′ between the third axis 11 and the second axis 5. Since the first contact receiving surface 10 that contacts the first outer peripheral surface 7 of the pipe 1 is formed by the circumferential surface 6, it is possible to make surface contact and increase the contact area between the two. The end of the pipe body 8 is not sharp, and can be handled with peace of mind even when handled by hand.
[Selection] Figure 1

Description

  The present invention relates to a connecting member that abuts and connects a pipe, a round bar, and the like.

  Conventionally, when connecting a reinforcing pipe obliquely to a long pipe of this type, the end of the reinforcing pipe is cut obliquely to form a cut having an elliptical cross section, and this cut is used as a contact surface. The pipe and the reinforcing pipe are fixed to each other by means of removable screw means such as bolts and nuts, or fixing means such as welding.

  In such a case where the tip of the pipe is cut obliquely to form the contact surface, a burr at the time of forming the cut remains, and the tip of the reinforcing pipe is brought into close contact with the pipe by the burr. In addition to being unable to do so, there is also the risk of injury from burrs when handling the reinforcing pipes by hand.

In order to solve such a problem, for example, a fitting member that fits into a pipe is provided at the tip of a support member, and this fitting member is formed by pressing an iron plate into a substantially V-shaped planar shape. The flat groove-shaped reinforcing rib continuous between the ends of the pair of left and right arm portions is integrally formed so as to protrude outward, and the bottom plate portion of the reinforcing rib constitutes the mounting plate portion on the support member side It is what has been done. Therefore, in this prior art, a pipe is fitted between arm parts (for example, patent document 1).
Japanese Patent Laid-Open No. 2006-70486

  In the prior art, a straight flat surface is formed on the arm side, and a circular surface is formed on the pipe side, so that the contact between the two becomes like a line contact, and the contact area between the two becomes narrow. As a result, there is a concern about a decrease in the connection strength.

  The problem to be solved is to provide a connecting member that can increase the contact area between the member to be attached and the end of the connecting member to the attached member, and that does not cause burrs at the end of the connecting member. .

According to the first aspect of the present invention, the end of the second outer peripheral surface of the connecting main body member is brought into contact with the first outer peripheral surface of the member to be attached, and the first abutment receiving member of the connecting main body member that comes into contact therewith. The surface is a connecting member provided obliquely with a second axis direction of the connecting main body member having an included angle with respect to the first axis direction of the attached member,
The first contact receiving surface is a connecting member formed by a part of a circumferential surface that is recessed toward the second axial direction.

  According to a second aspect of the present invention, a third shaft core disposed in the longitudinal direction along the circumferential surface is formed with the included angle between the third shaft core and the second member. The first radius of the first outer peripheral surface and the second radius of the circumferential surface are formed to be the same, and the center of the second radius is a planar shape including the third axis. The connecting member according to claim 1, wherein the connecting member is provided in a first virtual plane.

  The invention according to claim 3 is the connecting member according to claim 1 or 2, characterized in that the attached member has a circular cross section, and the connecting main body member has a cylindrical shape.

  The invention according to claim 4 is the connecting member according to any one of claims 1 to 3, wherein the connecting body member is formed by a cylindrical pipe having the same outer diameter.

  According to the invention of claim 5, the first abutment receiving surface has a width on the end side in a direction orthogonal to the third axis, and the width is the maximum width along the side opposite to the end side. The connecting member according to claim 1, wherein the width gradually decreases.

  The invention according to claim 6 is the connecting member according to claim 5, wherein the maximum width is formed to be a diameter of the connecting main body member.

  According to a seventh aspect of the present invention, the second virtual surface in which the first contact receiving surface extends on the inner peripheral surface of the connecting body member facing the first contact receiving surface on the end side. The connecting member according to any one of claims 1 to 6, wherein a second contact receiving surface is formed along the surface.

  According to the first aspect of the present invention, the end of the connecting member can come into surface contact with the attached member, the contact area between the two can be increased, and the end of the connecting member does not become sharp. Can be done.

  According to the second aspect of the present invention, the attached member and the first contact receiving surface are curved surfaces having the same curvature and can be in close contact with each other.

  According to the invention of claim 3, it can be used for assembling using a pipe.

  According to the invention of claim 4, weight reduction and handling property can be improved.

  According to the fifth aspect of the present invention, it is possible to withstand a large torque by setting the outer side to the maximum width at the contact point with the attached member.

  According to the invention of claim 6, the width can be increased as much as possible.

  According to the seventh aspect of the present invention, the attached member and the connecting main body member can contact not only the first contact receiving surface but also the second contact receiving surface.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. Note that the embodiments described below do not limit the contents of the present invention described in the claims of utility model registration. In addition, all of the configurations described below are not necessarily essential requirements of the present invention.

  The figure shows Example 1, and in this Example, it is a frame structure by pipe 1 in the assembly of a house, a scaffold or parts, etc., and has the same inner diameter and outer diameter as a pair of orthogonally attached members. A pipe 1 having a circular cross section is fixed by a connecting fitting 2 at the intersection, and the inner diameter side between the pipes 1 is separated from the connecting fitting 2 and has the same inner diameter and outer diameter as connecting members between the pipes 1. A connecting pipe 3 having a circular cross section is installed. Therefore, the second shaft core 5 indicating the longitudinal direction of the connecting pipe 3 is arranged obliquely with an included angle (inner angle) A with respect to the first shaft core 4 indicating the longitudinal direction of the pipe 1. Yes.

  Then, on both sides of the connecting pipe 3, the end portion 9 </ b> A side of the second outer peripheral surface 9 of the pipe main body 8 that is a connecting main body member is brought into contact with the first outer peripheral surface 7 of the pipe 1. The abutting first abutment receiving surface 10 is formed by a part of a circumferential surface 6 that is recessed inward toward the second axis 5 direction. Since the surface 10 is provided in parallel along the direction of the first axis 4 of the pipe 1, a third direction indicating the longitudinal direction of the first contact receiving surface 10 along the first contact receiving surface 10. The direction of the axis 11 is inclined with respect to the second axis 5 with the included angle A ′ (= the included angle A).

  Further, the second radius C that forms the circumferential surface 6 is the same as the first radius B that forms the first outer circumferential surface 7 of the pipe 1, and the center of the second radius C is the same. O is provided in the planar first virtual surface 12 including the third axis 11. The first imaginary plane 12 is shown in FIG. 4 by a vertical plane including the third axis 11. In the figure, L indicates the first center of the first radius B.

  In the first contact receiving surface 10, the width W on the end 9A side in the direction orthogonal to the third shaft core 11 is the maximum width, and this maximum width W is the pipe body having the same outer diameter. The first contact receiving surface 10 is formed so that the width W is gradually reduced along the side opposite to the end 9A side.

  Further, the first contact receiving surface 10 is extended to the outside of the third shaft core 11 on the inner peripheral surface on the end 9A side of the pipe body 8 facing the first contact receiving surface 10. A second contact receiving surface 14 is formed along the two virtual surfaces 13.

  Next, with reference to FIGS. 5 to 7, a method of manufacturing the connecting pipe 1 by using the mold 15 with the pipe material 8A having both ends opened will be described. The mold 15 includes a lower mold 17 and an upper mold 18 that are horizontally formed with a dividing surface 16 and can be opened and closed with each other, and a pair of left and right punch-shaped pressing molds 19 penetrating from one of the lower mold 17 and the upper mold 18. An integrated pressing plate 20 is connected to the base end 19A of the pressing die 19 so as to be able to reciprocate. In the embodiment, the pressing die 19 penetrates the lower die 17 perpendicular to the dividing surface 16. The lower die 17 is formed with a lower concave portion 21 recessed downward in a semi-cylindrical shape on the horizontal upper surface, and the upper concave portion 22 is formed with an upper concave portion 22 recessed upward in a semi-cylindrical shape on the lower lower surface 18. Thus, the upper concave portion 22 and the lower concave portion 21 are overlapped to form a hollow portion 23 in which the pipe material 8A is fitted and accommodated. The hollow portion 23 is formed in a shape such that the second axis 5 of the pipe material 8A coincides with the dividing surface 16. And the penetration part 24 penetrated to an up-down direction is provided in the both end part 9A side of the length direction of the lower recessed part 21. As shown in FIG. A central axis (not shown) of the penetrating portion 24 is arranged so as to be orthogonal to the second axis 5 of the pipe material 8A in the accommodated state. In the pressing die 19 whose front end faces the bottom surface of the first contact receiving surface 10, the second contact receiving surface 10 and the second contact receiving surface 14 so that the front end surface forms the first contact receiving surface 10 and the second contact receiving surface 14. A molding surface 25 corresponding to the contact receiving surface 14 is formed. The molding surface 25 is formed to face each other in the pair of left and right pressing dies 19.

  Therefore, as shown in FIG. 5, the lower half 21 of the pipe material 8A is accommodated in the lower recess 21 in advance in a state where the pressing die 19 is below the lower recess 21. Next, the upper mold 15 is moved closer to the lower mold 15 via a mold closing means (not shown), and the mold is clamped. At this time, the lower surface of the end portion in the longitudinal direction of the pipe material 8 </ b> A faces the penetrating portion 24. Next, as shown in FIGS. 6 to 7, when the pressing plate 20 is advanced relatively upward, the tip of the pressing die 19 pressed by the pressing plate 20 projects upward from the bottom surface of the lower recess 21. The lower surface of the end portion in the longitudinal direction of the material 8A is pressed by the molding surface 25, and plastic molding is started by the first contact receiving surface 10. Then, when the molding surface 25 reaches the upper surface side of the longitudinal end portion 9A of the pipe material 8A, the molding of the plastic working by the first contact receiving surface 10 and the second contact receiving surface 14 is completed. The molding surface 25 has the included angle A and the outer diameter cross-section arranged as described above is congruent with the circular pipe 1 and is in the same arrangement state.

  When the molding is completed in this way, first, the pressing plate 20 is retracted downward, so that the pressing die 19 is retracted from the bottom surface of the lower concave portion 21, and the upper die 18 is relatively separated from the lower die 17 to open the die. To do. Then, the processed pipe material 8A is taken out from the lower mold 15, and thereafter the through portion 2419 and the like are processed.

  Next, the operation of the above configuration will be described. A connecting pipe 3 formed at the end of the concave first abutment receiving surface 10 in the longitudinal direction is formed by a part of the circumferential surface that fits to the first outer peripheral surface 7 of the pipe 1. In the embodiment, the screw rod 18 having one end connected to the connecting metal fitting 2 is orthogonal to the second shaft core 5 in a state where the first contact surface is in contact with the pipe 1. Then, a female screw member 20 such as a nut is screwed into a portion of the screw rod 18 that penetrates the through-hole 2419 of the connecting pipe 3 and protrudes the connecting pipe 3, and the connecting pipe 3 is connected to the pipe 1. In addition to such a threaded rod 18 which shows a fixed one, as a fixing means, in addition to a detachable fixing means such as a clamp type for fixing the first contact receiving surface 10 to the pipe 1, welding is also possible. It may be a fixing means such as brazing. The first abutment receiving surface 10 is fitted to the first outer peripheral surface 7 of the pipe 1 and the second abutment receiving surface 14 is brought into contact with the first outer peripheral surface 7, thereby connecting to the pipe 1. The pipe 3 can be positioned with the included angle A accurately. Further, when the pipe 1 is fitted, the second contact receiving surface 14 is also brought into contact with the first outer peripheral surface 7 of the pipe 1, thereby increasing the positioning range in the direction of the first shaft core 4. Can do.

  Next, the operation of the above configuration will be described. A connecting pipe 3 formed at the end of the concave first abutment receiving surface 10 in the longitudinal direction is formed by a part of the circumferential surface that fits to the first outer peripheral surface 7 of the pipe 1. In the embodiment, the screw rod 18 having one end connected to the connecting metal fitting 2 is orthogonal to the second shaft core 5 in a state where the first contact surface is in contact with the pipe 1. Then, a female screw member 20 such as a nut is screwed into a portion of the screw rod 18 that passes through the through hole 19 of the connecting pipe 3 and protrudes from the connecting pipe 3, and the connecting pipe 3 is connected to the pipe 1. In addition to such a threaded rod 18 which shows a fixed one, as a fixing means, in addition to a detachable fixing means such as a clamp type for fixing the first contact receiving surface 10 to the pipe 1, welding is also possible. It may be a fixing means such as brazing. The first abutment receiving surface 10 is fitted to the first outer peripheral surface 7 of the pipe 1 and the second abutment receiving surface 14 is brought into contact with the first outer peripheral surface 7, thereby connecting to the pipe 1. The pipe 3 can be positioned with the included angle A accurately. Further, when the pipe 1 is fitted, the second contact receiving surface 14 is also brought into contact with the first outer peripheral surface 7 of the pipe 1, thereby increasing the positioning range in the direction of the first shaft core 4. Can do.

  As described above, in the embodiment, corresponding to claim 1, the first outer peripheral surface 7 of the pipe 1 is brought into contact with the end portion side of the second outer peripheral surface 9 of the pipe body 8, and the corresponding first contact is made. The abutment receiving surface 10 of the pipe 1 is provided obliquely with the included angle A in the second axis 5 direction of the pipe body 8 with respect to the first axis 4 direction of the pipe 1. The receiving surface 10 is formed by a part of the circumferential surface 6 that is recessed in the direction of the second axis 5 so that no burr after processing is formed on the end portion 9A. In addition, the first contact receiving surface 10 can come into surface contact with the first outer peripheral surface 7 of the pipe 1.

  Further, in the embodiment, corresponding to claim 2, the first radius B of the first outer circumferential surface 7 of the pipe 1 and the second radius C of the circumferential surface 6 are formed to be the same. The center O of the second radius C is provided in the planar first imaginary surface 12 including the third axis 11 so that the first outer peripheral surface 7 of the pipe 1 and the first abutment are brought into contact with each other. Since the curved surface having the same curvature as the receiving surface 10 can be brought into close contact with each other, the contact area between the two can be made as large as possible. In addition, the third axis 11 that is the longitudinal direction arranged so as to be inclined with respect to the longitudinal direction along the circumferential surface 6, that is, the longitudinal direction of the pipe 1 (the direction of the second axis 5) is the second. The first abutment receiving surface 10 that abuts on the first outer peripheral surface 7 of the pipe 1 is formed by the circumferential surface 6. It can be formed, both can be in surface contact, the contact area between them can be increased, and the end 9A side of the pipe body 8 is not sharp, and can be handled with confidence even if handled by hand. it can.

  Moreover, in the said Example, since the pipe 1 is circular in cross section and the pipe main body 8 is also a column shape corresponding to Claim 3, what is assembled with the pipe 1 is connected via the pipe main body 8. can do.

  Moreover, in the said Example, according to Claim 4, the pipe main body 8 is formed with the cylindrical pipe 1 of the same outer diameter, and it improves weight reduction and a handleability compared with a solid thing. Can do.

  Further, in the embodiment, corresponding to claim 5, the first contact receiving surface 10 has an end portion whose width W on the end portion side in the direction orthogonal to the third axis 11 is the maximum width. When the width W gradually decreases along the opposite side to the side, the end side is increased in the contact width with the pipe 1, and the outer side is maximized at the contact point with the pipe 1, thereby increasing the torque. Will be able to withstand.

  Further, in the embodiment, in correspondence with claim 6, the maximum width is formed to the diameter Z of the pipe body 8, so that the width W on the end side becomes the maximum width as much as possible, and even a large torque can be obtained. It will be able to withstand.

  Further, in the embodiment, corresponding to claim 7, the first contact receiving surface 10 extends on the inner peripheral surface of the pipe body 8 facing the first contact receiving surface 10. Since the second contact receiving surface 14 along the second virtual surface 13 is formed by a part of the circumferential surface, the pipe 1 and the connecting pipe 1 are not only the first contact receiving surface 10. By contacting the second contact receiving surface 14 as well, the contact area between the pipe 1 and the connecting pipe 1 can be further increased.

  As described above, the connecting member according to the present invention can be applied to various uses.

It is sectional drawing which shows Example 1 of this invention. It is the same top view. It is the same side view. It is a perspective view of the principal part. It is sectional drawing of the mold open state of the manufacturing process. It is sectional drawing of the mold closing state of the manufacturing process. It is a sectional side view of the manufacturing process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe 4 1st axial center 5 2nd axial center 7 1st outer peripheral surface 8 Pipe main body 9 2nd outer peripheral surface 9A End part
10 First contact receiving surface
11 Third axis
12 First virtual plane
13 Second virtual plane
14 Second contact receiving surface A A ′ Angle B First radius C Second radius O Center W Width Z Diameter

Claims (7)

An end of the second outer peripheral surface of the connecting main body member is brought into contact with the first outer peripheral surface of the attached member, and the first contact receiving surface of the connecting main body member that comes into contact with the first outer peripheral surface of the attached main member is the surface of the attached member. A connecting member provided in an oblique direction with a second axis direction of the main body member for connection having an included angle with respect to the first axis direction,
The connecting member according to claim 1, wherein the first contact receiving surface is formed by a part of a circumferential surface that is recessed toward the second axial direction.   A third axis disposed in the longitudinal direction along the circumferential surface is formed with the included angle between the second axis and the first outer circumferential surface of the attached member. A first radius and a second radius of the circumferential surface are formed to be the same, and a center of the second radius is in a planar first virtual plane including the third axis. The connecting member according to claim 1, wherein the connecting member is provided.   The connecting member according to claim 1, wherein the attached member has a circular cross section, and the connecting main body member has a cylindrical shape.   The connecting member according to claim 1, wherein the connecting main body member is formed by a cylindrical pipe having the same outer diameter.   The first contact receiving surface has a maximum width on the end side in a direction orthogonal to the third axis, and the width gradually decreases along the side opposite to the end side. The connecting member according to any one of claims 1 to 4, wherein the connecting member is provided.   6. The connecting member according to claim 5, wherein the maximum width is formed to a diameter of the connecting main body member.   On the inner peripheral surface on the end side of the connecting main body member facing the first contact receiving surface, a second virtual surface extending along the second virtual surface extending from the first contact receiving surface is provided. The contact member according to any one of claims 1 to 6, wherein a contact receiving surface is formed.

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