JP2010029885A - Pipe part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a pipe part which is lightweight and easily manufactured. <P>SOLUTION: After pressing recessed parts 8 on one side of both ends 4, 6 when both ends 4, 6 of a metal plate 2 are butted and formed into a pipe-shape and projecting parts 10 to be fitted into the recessed parts 8 on the other side on the metal plate 2 and after applying press working for attaching a member to the metal plate 2, the metal plate 2 is formed into the pipe shape by fitting the recessed parts 8 to the projecting parts 10. The recessed part 8 and the projecting part 10 are formed into a square shape. A gear 18 is mounted on the pipe part 1 and also the gear 18 is fixed via a screw screwed into a hole 12 which is press-worked for mounting the member. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pipe component formed into a pipe shape from a plate material, and more particularly to a pipe component used for a shaft or the like attached to an office machine and rotatably supported.

Conventionally, a round bar or the like has been used for the shaft. However, as disclosed in Patent Document 1, in order to reduce the weight of the office machine, a pipe is used for the shaft, and a retaining ring groove is formed on the outer periphery of the pipe. Or a notch or the like is formed at the end of the pipe.
Japanese Utility Model Publication No. 06-42192

  However, although these conventional devices can be reduced in weight, they have to be manufactured by advanced processing such as drawing and the manufacturing equipment is complicated. In addition, since a groove or a notch for attaching a member is formed in the pipe, there is a problem that processing of the groove or the notch is complicated.

  An object of the present invention is to provide a pipe component that is lightweight and can be easily manufactured.

In order to achieve this problem, the present invention has taken the following measures in order to solve the problem. That is,
When the both ends of the plate material are abutted and formed into a pipe shape, a recess is formed on one of the both ends, and a convex portion that can be fitted to the concave portion is processed on the plate material, and the concave portion and the convex portion are fitted. This is a pipe component characterized in that the plate material is formed into a pipe shape.

  At that time, the concave portion and the convex portion are processed into the plate material, the member is attached to the plate material, and then the concave portion and the convex portion are fitted to form the plate material into a pipe shape. May be. The concave portion and the convex portion may be formed in a square shape. Moreover, it may be attached to an office machine and supported rotatably. Further, a gear may be mounted, and the gear may be fixed via a screw screwed into a hole processed for attaching the member.

  The pipe part of the present invention is light in weight because it is molded into a pipe shape, and is formed into a pipe shape by fitting a concave portion and a convex portion. Has the effect of suppressing the shift in the axial direction. In addition, if the holes for attaching the members are simultaneously processed together with the concave portions and the convex portions, the processing for attaching the members can be easily performed.

The best mode for carrying out the present invention will be described below in detail with reference to the drawings.
As shown in FIG. 1, reference numeral 1 denotes a pipe part, which is formed in a hollow pipe shape, and the pipe part 1 is formed by winding a plate material 2 described later in a pipe shape. The pipe component 1 is formed into a pipe shape by abutting both ends 4 and 6 of the plate member 2.

  When the pipe component 1 is formed into a pipe shape, as shown in FIG. 2 (a), a plate material 2 is used as the material, and the material of the plate material 2 may be stainless steel or a surface-treated steel plate plated. Then, as shown in FIG. 2B, a concave portion 8 is formed at one end 4 of both ends 4 and 6 to be abutted, and a convex portion 10 is formed at the other end 6.

  In the present embodiment, both ends 4 and 6 of the plate member 2 are linear and formed in parallel to each other, and a concave portion 8 is formed in a square shape at one end 4. The quadrangular recess 8 is formed by pressing so that the sides of the quadrangular recess 8 are orthogonal to one end 4. The recesses 8 are formed at a predetermined interval at a plurality of locations, and at two locations in the present embodiment. The recesses 8 may be formed at three or more locations, and in that case, the recesses 8 may be formed at regular intervals.

  The convex portion 10 is formed so as to protrude from the other end 6. The convex portion 10 is formed in a quadrangular shape and is pressed so that the sides of the quadrangular convex portion 10 are orthogonal to the other end 6. It is formed by processing. Further, the convex portion 10 is formed in a size that can be fitted into the concave portion 8 with almost no gap, and the concave portion 8 and the convex portion 10 are formed at positions where the both ends 4 and 6 are mated with each other. ing.

  In addition to the concave portion 8 and the convex portion 10, the plate member 2 is formed with member mounting holes 12, 14, and 16 by pressing. The member mounting holes 12, 14, and 16 are for mounting members such as a gear 18, a roller 20, and an E-type retaining ring 22 described later.

  Lower holes 12 and 14 for screwing tapping screws 22 and 24 (not shown) for fixing the gear 18 and the roller 20 as members to the pipe part 1 are formed according to the positions where the gear 18 and the roller 20 are attached. ing. In addition, a plurality of rectangular holes 16 for attaching the E-type retaining ring 22 are formed according to the position where the E-type retaining ring 22 is attached.

  The concave portion 8, the convex portion 10, and the member mounting holes 12, 14, and 16 can be formed in the plate material 2 at a time by pressing. Alternatively, the plate material 2 may be formed from a material wound around a roll by stamping and simultaneously punching out the concave portion 8 and the convex portion 10 and the member mounting holes 12, 14 and 16. In the present embodiment, the concave portion 8, the convex portion 10, and the member mounting holes 12, 14, and 16 are formed by pressing. However, the present invention is not limited thereto, and may be processed by a beam cutter, a cutting machine, or the like. Good.

  After the plate 2 shown in FIG. 2 (b) is formed by press working, the plate 2 is pressed into a pipe shape as shown in FIG. The pipe part 1 is formed by molding. At that time, both ends 4 and 6 are abutted, and the concave portion 8 and the convex portion 10 are press-fitted. In the present embodiment, the concave portion 8 and the convex portion 10 are formed in a quadrangular shape. However, the present invention is not limited to this, and it is only necessary that both ends 4 and 6 can be fitted at the same time. A groove shape or the like may be used.

  As shown in FIG. 2 (d), a gear 18 is attached to the press-formed pipe part 1, and a tapping screw 22 is screwed into the hole 12 and fixed. Further, the roller 20 is mounted on the pipe part 1 and the tapping screw 24 is screwed into the hole 14 and fixed. Further, the E-type retaining ring 22 is fitted into the hole 16. Not only the tapping screw 22 but also a pin may be inserted into the hole 12 and fixed.

  In the present embodiment, the pipe part 1 is used as a shaft that is rotatably attached to a paper feed mechanism or the like of an office machine such as a copying machine, a facsimile machine, or a printer. The pipe component 1 is not limited to this, and may be used as a structural member, or may be used as a piping component through which a fluid is circulated, and a hole for mounting a component may not be processed.

  As shown in FIG. 3, the member mounting process is not limited to the hole, and the member mounting notch 26 may be press-molded. By forming this notch 26, when the pipe part 1 is formed by pressing the plate member 2 into a pipe shape so that both ends 4 and 6 abut each other, the cross-sectional shape of the notch 26 is formed in a substantially D shape. . Then, a rotation can be transmitted by forming a D-shaped through hole 30 in the gear 28 and inserting the pipe component 1 into the through hole 30.

  Further, as shown in FIG. 4, the tapered portion 32 and the contracted tube portion 34 may be press-molded on the axial end side of the pipe part 1. This can be formed in the same manner as described above by press-working the width of the plate material 2 in advance and press-molding the plate material 2 into a pipe shape so that both ends 4 and 6 are abutted.

Next, the operation of the above-described pipe component 1 of the present embodiment will be described.
For example, when the rotation is transmitted to the pipe part 1 via the gear 18, the pipe part 1 is rotated, and a recording sheet (not shown) is sent out by the roller 20. At that time, torque acts on the pipe part 1 and the pipe part 1 is twisted. The pipe part 1 is formed by abutting both ends 4 and 6, but even if the pipe part 1 is twisted, the concave part 8 and the convex part 10 are fitted, so the concave part 8 and the convex part 10 are The both ends 4 and 6 are prevented from slipping along the axial direction of the pipe part 1.

  Therefore, even if the pipe part 1 is formed by abutting the both ends 4 and 6 of the plate 2 without joining the both ends 4 and 6 of the plate 2 by welding, deformation due to twisting can be suppressed, and it is formed in a pipe shape. So it is lightweight. Further, since the member mounting holes 12, 14, 16 and the notches 26 are formed by pressing, the processing is easy, and the pressing can be performed together with the concave portion 8 and the convex portion 10. In addition, you may weld the both ends 4 and 6 of the board | plate material 2 as needed.

  The present invention is not limited to such embodiments as described above, and can be implemented in various modes without departing from the gist of the present invention.

It is a perspective view of a pipe component as one embodiment of the present invention. It is explanatory drawing which shows the manufacturing process of the pipe components of this embodiment. It is a perspective view of a pipe component as another embodiment. It is a perspective view of a pipe component as other embodiments.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Pipe component 2 ... Plate material 4, 6 ... End 8 ... Concave part 10 ... Convex part 12, 14, 16 ... Hole 18, 28 ... Gear 20 ... Roller 22 ... E type retaining ring 26 ... Notch 30 ... Through-hole 32 ... Taper Part 34 ... Reduced tube part

Claims (5)

When both ends of a plate material are butted into a pipe shape, a recess is formed on one of the ends, and a convex portion that can be fitted into the concave portion is processed on the plate material, and the concave portion and the convex portion are fitted. A pipe component, wherein the plate material is molded into a pipe shape. The concave portion and the convex portion are processed into the plate material, and the plate material is processed into a member attachment, and then the concave portion and the convex portion are fitted to form the plate material into a pipe shape. The pipe part according to claim 1, wherein The pipe component according to claim 1 or 2, wherein the concave portion and the convex portion are formed in a square shape. The pipe part according to any one of claims 1 to 3, wherein the pipe part is attached to an office machine and rotatably supported. The pipe component according to any one of claims 2 to 4, wherein a gear is mounted and the gear is fixed through a screw screwed into a hole processed for mounting the member. .

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