JP5107834B2 - Pipe structure - Google Patents

Description

  The present invention relates to a pipe structure such as a handrail or a fence obtained by assembling a plurality of hollow metal pipes.

  For example, a handrail or a fence (pipe structure) is widely obtained by assembling a hollow metal pipe. Conventionally, such a pipe structure has been assembled by joining a plurality of metal pipes by using fastening means such as bolts and rivets or by welding or the like. For example, in order to assemble a handrail, it was necessary to join a plurality of metal pipes constituting the support column by fastening means, welding, or the like on the side surfaces of the metal pipe constituting the beam pipe (handrail portion). In addition, since this prior art does not relate to the literature known invention, there is no prior art document information to be described.

However, the conventional pipe structure has the following problems because a plurality of pipes are joined by fastening means, welding, or the like.
That is, in the pipe structure to be joined using the fastening means, since a plurality of fastening means are required in addition to the pipe, the number of parts increases, the transportation cost to the installation site and the assembly workability. There is a problem that it gets worse. In addition, the pipe structure to be joined by welding has a problem that it takes time to work and the working place is limited, and if it is attempted to finish the joined part more smoothly, skill is required. It was.

  However, the present applicant has earnestly studied to obtain a pipe structure by assembling a metallic pipe while eliminating the need for welding or separate fastening means. For example, a claw portion that can be elastically deformed is provided on the assembly-side pipe. Then, when assembling the tip of the assembly side pipe into the opening formed on the side surface of the assembly side pipe, it was considered to use the elastic deformation of the claw portion to prevent it from coming off. However, in that case, since it is necessary to elastically deform the claw part formed in the assembly side pipe, there is a problem that it is difficult to form the claw part.

  The present invention has been made in view of such circumstances, and a plurality of metal pipes can be assembled easily and inexpensively without using elastic deformation or the like of the assembly side pipe or the assembly side pipe. It is to provide a pipe structure.

  The invention according to claim 1 is a pipe structure obtained by assembling a plurality of hollow metal pipes, and a to-be-assembled side pipe having an arc-shaped cut portion on a side surface, and a tip portion thereof being inserted into the cut portion. The assembly-side pipe having a circular cross section that is made possible, and a notch extending in the longitudinal direction and the circumferential direction at the tip of the assembly-side pipe, and the cut portion of the assembly-side pipe A guide portion that guides the insertion while permitting the insertion operation of the tip portion and the rotation operation of the tip portion in the circumferential direction, and the tip portion of the assembly-side pipe is a notch portion of the assembly-side pipe The tip of the assembly side pipe comes into contact with the inner peripheral surface of the assembly-side pipe by being assembled while being rotated through the insertion.

According to a second aspect of the present invention, in the pipe structure according to the first aspect, the guide portion extends in a longitudinal direction of the assembled side pipe, and the tip end portion of the assembled side pipe with respect to the cut portion. A first guide portion that guides the insertion while allowing the insertion operation of the first guide portion, and further extends from a proximal end side of the first guide portion, and extends in a circumferential direction of the assembly-side pipe and extends to the assembled side. A second guide portion that guides the insertion while allowing an insertion operation and a rotation operation of the tip portion with respect to the cut portion of the pipe;
It is characterized by having.

  According to a third aspect of the present invention, in the pipe structure according to the first or second aspect, a convex shape is provided on a proximal end side of the guide portion in the assembled side pipe, and a side surface of the assembled side pipe. Is characterized in that, in addition to the arc-shaped cut portion, a fitting hole capable of fitting the convex shape is formed.

  According to a fourth aspect of the present invention, in the pipe structure according to any one of the first to third aspects, the tip of the assembled side pipe has a shape that follows the inner peripheral surface of the assembled side pipe. And substantially matches when abutting.

  According to a fifth aspect of the present invention, in the pipe structure according to any one of the first to fourth aspects, the cut portion and the guide portion are formed by laser light irradiation.

  According to the first aspect of the present invention, the tip of the assembly-side pipe is rotated and assembled while being inserted into the cut-out portion of the assembly-side pipe, so that the tip of the assembly-side pipe is connected to the assembly-side pipe. Since it is in contact with the inner peripheral surface, a plurality of metal pipes can be assembled easily and inexpensively without using the elastic deformation of the assembled side pipe or the assembled side pipe.

  According to the invention of claim 2, the guide portion extends in the longitudinal direction of the assembly side pipe and guides the insertion while allowing the insertion operation of the tip portion to the cut portion of the assembly side pipe. Further extending from the proximal end side of the guide portion and the first guide portion, extending in the circumferential direction of the assembly side pipe, and inserting and rotating the tip portion with respect to the cut portion of the assembly side pipe Since it has the 2nd guide part which guides insertion while allowing, a plurality of metal pipes can be assembled more reliably and smoothly.

  According to the invention of claim 3, a convex shape is provided on the proximal end side of the guide portion in the assembly side pipe, and the convex shape is fitted on the side surface of the assembly side pipe in addition to the arc-shaped cut portion. Since the fitting hole that can be combined is formed, when assembling the assembly side pipe to the assembly side pipe, by fitting the convex shape into the engagement hole, the assembly side of the assembly side pipe It is possible to prevent rotation with respect to the pipe, and the joint strength between both pipes can be further improved.

  According to the invention of claim 4, the tip of the assembly side pipe has a shape imitating the inner peripheral surface of the assembly side pipe and substantially coincides with the abutment side pipe. Assembling of the pipe can be performed more firmly and stably.

  According to the invention of claim 5, since the notch and the guide are formed by laser light irradiation, the notch and the guide can be formed easily and accurately.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The pipe structure according to the present embodiment includes a handrail obtained by assembling a plurality of hollow metal pipes, and as shown in FIG. 1, a to-be-assembled side pipe 1 serving as a beam pipe and a beam pipe are supported. It is mainly comprised from the assembly side pipe 2 used as the support | pillar to perform. The assembled side pipe 1 and the assembled side pipe 2 are formed of a hollow metal pipe (for example, a stainless steel pipe), and a plurality of assembled side pipes with respect to the single assembled side pipe 1. 2 is configured to be assembled.

  As shown in FIG. 2, the assembled-side pipe 1 is made of a metal pipe having a circular cross section with an arc-shaped cut portion 3 on the side surface, and the cut portion 3 is vertically (or left and right) in front view. ) A pair is formed. These notches 3 have the same curvature as the cross-sectional shape of the assembly-side pipe 2, and a pair of fitting holes 4 are formed between them. Thus, the pair of cut portions 3 and the fitting hole 4 are formed along the cross-sectional shape of the assembly-side pipe 2 as a whole.

  Further, a plurality of the cut portions 3 and the fitting holes 4 are formed at positions where the assembly side pipe 2 in the assembly side pipe 1 is to be assembled, and the assembly side pipe 2 with respect to each cut portion 3. The width dimension of the notch 3 is set slightly larger than the wall thickness of the assembled pipe 2 so that the distal end (the vicinity of the distal end 2a on the side assembled to the assembled pipe 1) can be inserted. Has been. In addition, the center part of the notch part 3 is formed so that a width dimension is a little larger than another site | part, and it is comprised so that the front-end | tip 2a of the assembly side pipe 2 can be easily inserted from the center part.

  The assembly side pipe 2 is made of a metal pipe having a circular cross section in which the tip end portion (site near the tip end 2a) can be inserted into the cut portion 3 of the above-described assembly side pipe 1 is shown in FIGS. As shown, a guide portion including a first guide portion 5 and a second guide portion 6 is formed at the tip portion. Two of these guide portions (the first guide portion 5 and the second guide portion 6) are formed in the radial direction of the assembly-side pipe 2. The first guide portion 5 is formed of a notch extending linearly from the distal end 2 a of the assembly-side pipe 2 toward the proximal end 2 b side, and the second guide portion 6 is a proximal end side of the first guide portion 5. It consists of a notch extending continuously from the circumferential direction.

  However, the first guide portion 5 extends in the longitudinal direction of the assembly-side pipe 2 and inserts the tip end portion of the assembly-side pipe 2 into the notch portion 3 of the assembly-side pipe 1 (the arrow in FIG. 5). This is for guiding the insertion while allowing the movement of the direction). The second guide portion 6 is further extended from the proximal end side of the first guide portion 5, extends in the circumferential direction of the assembly-side pipe 2, and is assembled to the cut portion 3 of the assembly-side pipe 1. This is for guiding the insertion while allowing the insertion operation and the rotation operation (operations in the directions of two arrows in FIG. 6) of the distal end portion of the attached pipe 2.

  Furthermore, the convex shape 7 is provided in the base end 6a side of the guide part (this embodiment 2nd guide part 6) in the assembly side pipe 2, respectively. The convex shape 7 is dimensioned to fit into the fitting hole 4 formed on the side surface of the assembled pipe 1, and the leading end of the assembled pipe 2 is connected to the first guide portion 5 and the second guide portion 5. After being inserted into the cut portion 3 while being guided by the guide portion 6 (see FIG. 7), by further inserting, the convex shape 7 is fitted into the fitting hole 4 (see FIGS. 8 and 9). The assembly side pipe 2 is prevented from rotating with respect to the attachment side pipe 1.

  On the other hand, as shown in FIG. 9, the tip 2a of the assembly side pipe 2 has a shape (an arc shape having substantially the same curvature) that follows the inner peripheral surface 1a of the assembly side pipe 1. As shown, the tip 2a and the inner peripheral surface 1a are configured to substantially match when abutting. As shown in the figure, the base end 6a of the second guide portion 6 has a shape (an arc shape having substantially the same curvature) that follows the outer peripheral surface 1b of the assembled pipe 1. As shown, the base end 6a and the outer peripheral surface 1b are configured to substantially coincide with each other at the time of contact.

Next, a method for assembling the assembly side pipe 2 to the assembly side pipe 1 will be described.
First, as shown in FIG. 5, the front end 2a of the assembly-side pipe 2 is made to face the notch 3 of the assembly-side pipe 1, and the assembly-side pipe 2 is inserted in the insertion direction (the arrow direction in the figure). Move to. At this time, the first guide portion 5 allows a linear insertion operation of the tip end portion (a range where the first guide portion 5 is formed in the vicinity of the tip end 2a) with respect to the cut portion 3 of the assembled pipe 1. It is possible to guide the insertion while.

  After being inserted to the base end of the first guide portion 5, as shown in FIG. 6, the insertion side pipe 1 is continuously inserted while rotating in the arrow direction. At this time, the second guide portion 6 allows the insertion operation and the rotation operation of the distal end portion (a range where the second guide portion 6 is formed in the vicinity of the distal end 2a) with respect to the cut portion 3 of the assembled pipe 1. However, the insertion can be guided. In such a state, the assembly-side pipe 2 is prevented from coming off from the assembly-side pipe 1.

  Further, by continuing the insertion operation, as shown in FIG. 8, the convex shape 7 enters the fitting hole 4 and is fitted therein, and the rotation of the assembled side pipe 2 with respect to the assembled side pipe 1 is prevented. Will be achieved. At this time, as shown in FIG. 9, the front end 2 a of the assembly-side pipe 2 is in contact with the inner peripheral surface 1 a of the assembly-side pipe 1 while being in contact with the second guide portion 6 of the assembly-side pipe 2. The base end 6a contacts with the outer peripheral surface 1b of the assembled pipe 1 while being in contact therewith.

  Here, at least the notch 3 and the guide (the first guide 5 and the second guide 6) are formed by laser light irradiation. That is, the laser beam is radiated toward a position where the cut portion 3 and the guide portion (the first guide portion 5 and the second guide portion 6) are to be formed into a desired shape. Note that the convex shape 7, the base end 6a, or the front end 2a is also preferably formed by laser light irradiation.

  According to the above-described embodiment, the distal end 2a of the assembly-side pipe 2 is assembled by rotating and assembling the distal end portion of the assembly-side pipe 1 through the notch 3 of the assembly-side pipe 2. Since it is in contact with the inner peripheral surface 1a of the side pipe 1, a plurality of metal pipes can be assembled simply and inexpensively without using elastic deformation or the like of the assembled side pipe 1 or the assembled side pipe 2. it can.

  In addition, a guide portion composed of a notch extending in the longitudinal direction and the circumferential direction at the distal end portion of the assembly side pipe 2 extends in the longitudinal direction of the assembly side pipe 2 and A first guide portion 5 that guides the insertion while allowing the insertion operation of the tip portion with respect to the notch portion 3, and further extends from the proximal end side of the first guide portion 5, and extends in the circumferential direction of the assembly-side pipe 2. The second guide portion 6 that extends and guides the insertion while allowing the insertion operation and the rotation operation of the tip portion with respect to the cut portion 3 of the assembled pipe 1 is provided. Pipes can be assembled.

  Furthermore, while providing the convex shape 7 in the base end 6a side of the guide part (2nd guide part 6) in the assembly side pipe 2, in addition to the circular-arc-shaped notch 3 on the side surface of the assembly side pipe 1, Since the fitting hole 4 capable of fitting the convex shape 7 is formed, by fitting the convex shape 7 to the fitting hole 4 when assembling the assembled side pipe 2 to the assembled side pipe 1 The rotation of the assembly-side pipe 2 with respect to the assembly-side pipe 1 can be stopped, and the joint strength between both pipes can be further improved.

  Furthermore, the tip 2a of the assembly-side pipe 2 has a shape that follows the inner peripheral surface 1a of the assembly-side pipe 1 and is substantially matched when abutted. Assembling of 2 can be performed more firmly and stably. At least the notch 3 and the guide (the first guide 5 and the second guide 6) are formed by laser light irradiation, so that the notch 3 and the guide can be formed easily and accurately. it can.

  Although the present embodiment has been described above, the present invention is not limited to this. For example, as shown in FIG. 10, the second guide portion 6 ′ is the circumferential direction of the assembly side pipe 2 ′ and The first guide portion 5 and the second guide portion 6 ′ may be formed in an L shape so as to extend in a direction substantially orthogonal to the one guide portion 5. That is, the “circumferential direction” in the present invention is a direction inclined at a predetermined angle from the longitudinal direction of the assembly-side pipe (see the above embodiment), and a direction orthogonal to the longitudinal direction as shown in FIG. Is also included. However, as shown in FIG. 11, an assembly having a second guide portion 6 ″ in which one edge extends in the circumferential direction of the assembly-side pipe 2 ″ and the other edge extends the first guide portion 5. It may be a side pipe 2 ″.

  Moreover, in the said embodiment, although the some assembly | attachment side pipe 2 is assembled | attached with respect to the side surface of the one to-be-assembled side pipe 1, those end faces of two or more assembly side pipes are faced | matched. A plurality of assembly side pipes 2 may be assembled to the side surface. For example, as shown in FIGS. 12 and 13, the assembling side pipe 2 may be assembled to the abutting portion while the end surfaces of the assembling side pipes 8 and 9 are brought into contact with each other.

  In this case, as shown in FIG. 13, the notch 3 is formed over the assembled side pipes 8 and 9, and one fitting hole 4 is formed in each of the assembled side pipes 8 and 9. It is preferable that the assembly side pipe 2 is assembled. According to this, the assembly side pipe 2 can be assembled to the assembly side pipes (8, 9) simultaneously with the connection of the assembly side pipes 8, 9.

  In particular, the assembled side pipe is not limited to a circular cross section as in the present embodiment, and may be a square pipe or a semi-cylindrical pipe having a rectangular cross section, for example. The pipe structure is not limited to a handrail, but can be obtained by assembling the assembled side pipe and the assembled side pipe (pipe structure for placing and fixing a luggage or a cargo such as a ship or an aircraft) Body etc.).

  The assembled side pipe with a circular cross section having an arc-shaped cut portion on the side surface, the assembled side pipe with a circular cross section whose tip portion can be inserted into the cut portion, and the tip of the assembled pipe Part is formed of notches extending in the longitudinal direction and the circumferential direction, and is inserted while allowing the insertion operation of the tip part to the notch part of the assembled pipe and the rotation operation of the tip part in the circumferential direction. A guide portion for guiding, and by rotating and assembling the front end portion of the assembly side pipe through the notch portion of the assembly side pipe, the front end of the assembly side pipe is connected to the assembly side pipe. As long as the pipe structure is formed in contact with the inner peripheral surface, the pipe structure can be applied to one having a different external shape or one to which another function is added.

Overall schematic view showing a pipe structure (handrail) according to an embodiment of the present invention The enlarged view which shows the state before attaching an assembly side pipe to the assembly side pipe in the same pipe structure. The enlarged perspective view which shows the assembly side pipe in the same pipe structure Front view and side view showing assembly side pipe in the pipe structure Schematic diagram for explaining the process (before assembly) of assembling the assembly side pipe to the assembly side pipe in the pipe structure Schematic diagram for explaining the process of assembling the assembly side pipe to the assembly side pipe in the pipe structure (in the middle of assembly) Schematic diagram for explaining the process of assembling the assembly side pipe to the assembly side pipe in the pipe structure (in the middle of assembly) Schematic diagram for explaining the process (after assembly) of assembling the assembly side pipe to the assembly side pipe in the pipe structure The schematic diagram which shows the state by which the assembly side pipe was assembled | attached to the to-be-assembled side pipe in the same pipe structure. The enlarged schematic diagram which shows the assembly side pipe in the pipe structure which concerns on other embodiment of this invention. The front view and side view which show the assembly side pipe in the pipe structure which concerns on other embodiment of this invention. Overall schematic view showing a pipe structure (handrail) according to still another embodiment of the present invention. The perspective view which shows the state before attaching an assembly side pipe to the to-be-assembled side pipe in the same pipe structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Assembling side pipe 1a Inner peripheral surface 1b Outer peripheral surface 2 Assembling side pipe 2a Tip 2b Base end 3 Notch part 4 Fitting hole 5 1st guide part (guide part)
6 Second guide (guide)
7 Convex shape 8, 9 Assembly side pipe

Claims (5)

In a pipe structure obtained by assembling a plurality of hollow metal pipes,
A to-be-assembled pipe having an arc-shaped cut portion on the side surface;
An assembly side pipe having a circular cross section in which a tip portion can be inserted into the cut portion;
The front end portion of the assembly side pipe includes notches extending in the longitudinal direction and the circumferential direction, and the insertion operation of the front end portion with respect to the cut portion of the assembled side pipe and the circumferential direction of the front end portion. A guide unit that guides the insertion while allowing the rotational movement of
The tip of the assembly-side pipe is rotated while being inserted into the cut-out portion of the assembly-side pipe so that the tip of the assembly-side pipe is the inner peripheral surface of the assembly-side pipe. A pipe structure characterized by being in contact with the pipe. The guide part is
A first guide portion that extends in a longitudinal direction of the assembly-side pipe and guides the insertion while allowing an insertion operation of the tip portion with respect to the cut portion of the assembly-side pipe;
Further extending from the base end side of the first guide portion, extending in the circumferential direction of the assembly side pipe, and allowing the insertion operation and rotation operation of the tip portion with respect to the cut portion of the assembly side pipe A second guide for guiding the insertion while
The pipe structure according to claim 1, comprising:   A convex shape is provided on the proximal end side of the guide portion in the assembly-side pipe, and the side surface of the assembled-side pipe can be fitted with the convex shape in addition to the arc-shaped cut portion. The pipe structure according to claim 1 or 2, wherein a hole is formed.   The tip of the assembly side pipe has a shape imitating the inner peripheral surface of the assembly side pipe and is substantially matched when abutting. Pipe structure.   The pipe structure according to any one of claims 1 to 4, wherein the cut portion and the guide portion are formed by laser light irradiation.

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