JP2006175469A - Pipe connecting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To firmly connect and fix a first pipe to a second pipe without carrying out a special processing on the pipes, and further to select a connecting means according to required strength. <P>SOLUTION: In a pipe connecting structure for connecting the end portion of the second pipe 3 to the peripheral surface of the first pipe 2 so as to be almost perpendicular to each other, one or more auxiliary connecting devices 1 are provided. The devices 1 connects, by welding, a part or the whole surface of the peripheral surface 3b of the second pipe to a part or the whole surface of the peripheral surface 2a of the first pipe 2 at the positions outside from the connecting surface of the end portion 3a of the second pipe 3 to the peripheral surface 2a of the first pipe 2, and has a nearly trapezoidal shape in a side view. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

    The present invention relates to a pipe connection structure for connecting an end portion of a second pipe to a peripheral surface of a first pipe at a substantially right angle, and a pipe frame structure for furniture or a panel configured using the pipe connection structure.

    Conventionally, as a connection structure by welding that connects the end of the other pipe to the peripheral surface of one pipe, a structure in which the end of the other pipe is expanded and welded to the peripheral surface of one pipe (for example, Patent Document 1). )

The connection structure described in Patent Document 1 is complicated in processing and further increases in processing cost. In addition, because the other pipe end is expanded, it can be welded to a wide area on the peripheral surface of one pipe, but the shape of the expanded portion becomes unstable and the plate thickness is reduced, making it vulnerable to shearing force and torsional moment. Is.
JP 2003-285162 A

  Therefore, in view of the above-described situation, the present invention intends to solve the problem that, in order to firmly connect the first pipe and the second pipe, the pipe can be firmly connected and fixed without special processing. The connection means according to the required strength can be selected.

  In order to solve the above-described problems, the present invention provides a pipe connection structure for connecting an end of a second pipe to a peripheral surface of a first pipe at a substantially right angle, and a part of the peripheral surface of the second pipe. It is set as the structure provided with the 1 or several auxiliary | assistant connector which weld-joins a part or all the surrounding surface and a part or all the surrounding surface of the said 1st pipe by welding (Claim 1).

  Here, a part or the entire circumference of the peripheral surface of the second pipe at a position spaced from the end of the second pipe, and an end of the second pipe on the peripheral surface of the first pipe It is preferable to include one or a plurality of auxiliary connectors having a substantially trapezoidal shape in a side view that welds and joins a part of the outer periphery or the entire periphery from the joint surface.

  In addition, it is possible to configure a furniture or panel pipe connection frame by connecting at least one second pipe between at least two opposing first pipes using the pipe connection structure. Preferred (claim 3).

  The pipe connection structure according to the first aspect of the present invention is the pipe connection structure for connecting the end portion of the second pipe to the peripheral surface of the first pipe at a substantially right angle. Since one or a plurality of auxiliary connectors for welding and joining a part or all of the peripheral surface and a part or all of the peripheral surface of the first pipe are provided, special processing is applied to the pipe. Without changing the diameter of the second pipe, the number of auxiliary connectors to be mounted can be adjusted according to the bending strength and shear strength applied to the first and second pipe connecting portions. The required strength can be maintained by changing.

  According to claim 2, a part or the entire circumference of the peripheral surface of the second pipe at a position spaced from the end of the second pipe, and the second pipe on the peripheral surface of the first pipe Since one or a plurality of auxiliary connection tools having a substantially trapezoidal shape in side view, which welds and joins a part of the outer periphery or the entire circumference from the joint surface with the end of the first connection part, the auxiliary connection tool and the first pipe welding connection surface are provided. In addition to having a wider range of the outer peripheral surface than the first and second pipe connection surfaces, the auxiliary connector and the second pipe welded connection surface are positioned away from the first and second pipe connection surfaces. The attachment strength of the first pipe and the second pipe can be improved.

  According to claim 3, using the pipe connection structure according to claim 1 or 2, furniture or at least one second pipe connected between at least two opposing first pipes Since it is a pipe connection frame of a panel, for example, if it is used as a pipe frame of a back or seat used for a chair or a pipe frame of a partition panel, it is much stronger than a connection pipe simply connected between multiple pipes It is possible to provide a pipe frame that is excellent in the cost and cost.

  Next, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings. 1 to 4 show a first embodiment of a connection structure of a first pipe and a second pipe using the present invention, FIG. 5 shows an auxiliary connector in the present invention, and FIG. 2nd Embodiment of the connection structure of the 1st pipe and 2nd pipe using invention is shown, FIG. 7 shows 3rd Embodiment of the connection structure of the 1st pipe and 2nd pipe using this invention. FIG. 8 shows an embodiment of furniture using the connecting structure according to the present invention, and FIGS. 9 to 11 show embodiments of partition panels using the connecting structure according to the present invention.

  As shown in FIGS. 1 and 2, the pipe connection structure according to the present invention performs fillet welding after abutting the end 3 a of the second pipe 3 so as to be substantially orthogonal to the peripheral surface 2 a of the first pipe 2. Then, the auxiliary connector 1 is disposed so as to cover the connecting portion of the first pipe 2 and the second pipe 3 that are connected and joined in a substantially orthogonal state so as to cover from the outside. Is formed by performing fillet welding on the peripheral surface 2a of the first pipe 2 and the peripheral surface 3b of the second pipe 3 and connecting and joining them. The shaded portion indicates the weld location.

  As shown in FIG. 3 and FIG. 4, the first pipe 2 and the second pipe 3 shown in FIG. The shape of the end portion 3a that is the abutting surface of the second pipe 3 with respect to the peripheral surface 2a is optimally the same as the shape of the peripheral surface 2a of the first pipe. The abutting surface of the pipe 2 can be welded and joined in a state of tapering as shown in FIG. 7 as viewed in the direction of the arrow I-I, and the abutting surface shape of one pipe is particularly limited. Various shapes can be adopted instead of those.

  Then, as shown in FIGS. 3, 4, and 5, the attachment state of the first pipe 2 and the second pipe 3 connected to the auxiliary connector 1 will be described in detail. The auxiliary connector 1 has a substantially trapezoidal shape in a side view made up of a top surface 1a, a ground surface 1b, left and right side surfaces 1d and 1d, and left and right corner surfaces 1c and 1c. The surfaces 1c and 1c are in contact with the peripheral surface 2a of the first pipe 2, and the top surface of the substantially semicircular shape in plan view is in contact with the peripheral surface 3a of the second pipe, and a part of these contact surfaces or The fillet welding is performed on the whole to perform connection joining. The shape of each contact surface may correspond to the cross-sectional shape of the pipes to be connected and connected, and fillet welding may be performed on all the contact surfaces (1a, 1b, 1c) according to the required connection strength. It is possible to select between the contact surfaces (1a and 1b), (1a and one of the 1c), or (1a and the left and right 1c). In the present embodiment, since the auxiliary connector 1 having a substantially semicircular shape in plan view is used, when there is only one auxiliary connector, it is connected to the half circumference of the peripheral surface 3b of the second pipe 3 and there are two. Can be connected to the entire circumference of the peripheral surface 3b of the second pipe 3, but it is also possible to use an auxiliary connector that is divided into a plurality of equal parts (for example, a quadrant) in plan view.

  FIG. 6 shows another embodiment of the present invention, in which two auxiliary members having the same shape are sandwiched so as to sandwich a connecting portion obtained by connecting and connecting the first pipe 2 and the second pipe 3 in a substantially orthogonal state. It is an exploded view of the connected state welded to each pipe using a connector, and the details of the attached state are the same as when one auxiliary connector is used, but it is omitted, but in the attached state each auxiliary The left and right side surfaces 1d and 1d of the connector 1 are attached by being substantially in contact with each other. And since two auxiliary | assistant coupling tools are pinched | interposed and couple | bonded from the both sides of a pipe, compared with the case where it couple | bonds and couple | bonds by one auxiliary | assistant coupling tool, still higher strength can be hold | maintained.

  FIG. 8 is an embodiment in which the present invention is applied to furniture A (in this embodiment, the back frame of a chair), and two back strut pipes 4 (first pipes) are arranged in a substantially parallel state and connected to the back struts. After one pipe 5 (second pipe) is welded in a substantially orthogonal state, one auxiliary connector 1 is used for each of the left and right joints (two or more may be used), and the detailed description has been given above. It is a pipe connection frame assembled by using the attachment method of the auxiliary connector 1. Although a drawing is omitted in this embodiment, a backrest or the like can be attached using the pipe connection frame. According to the present invention, the back strut connecting pipe 5 can be held with high strength (with respect to the shearing force and torsional moment) with respect to the back strut pipe 4, and the back strut connecting pipe 5 is more external than the back strut pipe 4. Even if a thin pipe is used, the presence of the auxiliary connector 1 maintains the same high strength (for shear force and torsional moment) as a thick pipe (for example, approximately the same diameter as the back strut pipe). it can.

  9, 10, and 11 are embodiments in which the present invention is applied to a panel B (a frame of a partition panel in the present embodiment), and two vertical frames 6 (first pipes) having a substantially rectangular or rectangular cross section are provided. An upper frame 7 (cross-sectionally U-shaped or cylindrical) having the same width as the thickness of the vertical frame 6 is fixed between the upper portions of the vertical frame 6 in a state substantially orthogonal to the vertical frame 6. The vertical frame 6 has an appropriate space below the upper frame 7, has a thickness width smaller than the thickness of the vertical frame 6 in a state substantially parallel to the upper frame 7, and has a circular, oval, rectangular or rectangular cross section. After fixing one or a plurality of polygonal intermediate frames 8 (second pipes) (in this embodiment, fillet welding), one auxiliary connector 7 is used for each of the left and right joints (two or more may be used). The auxiliary connector 1 described in detail above is removed. Only a pipe connection frame assembled by a method substantially the same way. In the present embodiment, one or a plurality of surfaces indicated by a one-dot chain line by using a plurality of engagement holes 6a provided at fixed positions on one or both sides of the vertical frame and using a fixture (not shown). The panel is detachably attached to one side or both sides of the vertical frame 6.

  In the present embodiment, a pipe having a substantially rectangular or rectangular cross section is used as the vertical frame 6, and a pipe having a substantially rectangular or rectangular cross section is used as the intermediate frame 8. The form is different from the form of the auxiliary connector 1, but the effect provided by the auxiliary connector 7 is the same as the effect provided by the auxiliary connector 1. The difference is that the left and right corner surfaces 1c and 1c shown in the side view are parallel to the top surface 1a and on the extended line of the ground surface 1b, and are substantially trapezoidal from the top surface 1a, the left and right side surfaces 1d and 1d, and the ground surface 1b. The formed planar view or bottom view shape is substantially U-shaped.

  When the vertical frame 6 is a pipe having a substantially circular or oval cross section and the intermediate frame 8 is a pipe having a substantially rectangular or substantially rectangular cross section, or the vertical frame 6 is a pipe having a substantially rectangular or substantially rectangular cross section. When a pipe having a substantially circular or oval cross section is used as the intermediate frame 8, the shape of the auxiliary connector can be formed by corresponding to the shape of each pipe on the contact surface with each pipe. Of course, the shape of each pipe can correspond to other shapes (for example, a polygon, an ellipse, etc.).

It is a perspective view which shows 1st Embodiment of the connection structure of the 1st pipe and 2nd pipe using this invention. It is an exploded perspective view similarly. It is a II arrow view similarly. It is an II arrow exploded view similarly. The front view, side view, and bottom view of an auxiliary | assistant coupling tool are shown. It is a perspective view which shows 2nd Embodiment of the connection structure of the 1st pipe and 2nd pipe using this invention. It is a perspective view which shows 3rd Embodiment of the connection structure of the 1st pipe and 2nd pipe using this invention. The embodiment of the furniture using the connection structure concerning the present invention is shown. Embodiment of the partition panel using the connection structure which concerns on this invention is shown. It is a II-II arrow line view similarly. It is also a III-III arrow line view.

Explanation of symbols

A Furniture B Panel 1 Auxiliary connector 1a Auxiliary connector top surface 1b Auxiliary connector ground surface 1c Auxiliary connector corner surface 1d Auxiliary connector side surface 2 First pipe 2a First pipe peripheral surface 3 Second Pipe 3a Second pipe end face 3b Second pipe peripheral face 3 'Second pipe 4 Back strut pipe 5 Back strut connecting pipe 6 Vertical frame 6a Engaging hole 7 Upper frame 8 Intermediate frame 9 Auxiliary connector

Claims (3)

  In the pipe connection structure for connecting the end of the second pipe to the peripheral surface of the first pipe at a substantially right angle, a part or the entire peripheral surface of the peripheral surface of the second pipe, and the first pipe A pipe connection structure comprising one or a plurality of auxiliary connectors for welding and joining a part or all of the peripheral surfaces of the pipe.   The end of the second pipe according to claim 1, wherein a part or the entire circumference of the peripheral surface of the second pipe at a position separated from an end of the second pipe, and an end of the second pipe on the peripheral surface of the first pipe. A pipe connection structure comprising one or a plurality of auxiliary connection tools having a substantially trapezoidal shape in side view, which welds and joins a part of the outer periphery or the entire periphery from a joint surface with a portion.   A pipe for furniture or a panel, wherein at least one second pipe is connected between at least two opposite first pipes using the pipe connection structure according to claim 1 or 2. Linked frame structure.

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