JP2009115306A - Fitting member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the fitting member with large locking power and little loosening in use by the easy structure which inserts a rod-like member into a tubular member. <P>SOLUTION: In the condition where a bolt 4 is pierced into the piece 1a, 1b, 1c which splits the second tubular member into three and the male screw of the bolt 4 is screwed to the female screw 2 which is set to the piece 1a, the bolt 4 is tightened by inserting into the first tubular member 5. Since the split face of the piece 1a, 1b, 1c forms a slope, the component force of a vertical direction to the tubular member and the axis of the bolt 4 is produced and the fitting power between the first tubular member 5 and the second tubular member increases, which acquires a reliable fitting condition. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fitting member that inserts and fixes another tubular member inside a tubular member, and more particularly to a fitting member that improves the locking force of fitting.

  A method for assembling a part in which a rod-like member is inserted into and fixed to a tubular member is used in various fields. For example, in the field of household goods, shelves with a structure that joins and assembles metal pipes are commercially available, and there is an advantage that the size can be arbitrarily set according to the user's needs, and it is widely used Yes.

  Also, in the field of wheelchairs and the like, fitting members having the above-described configuration are frequently used to attach members such as pedals and casters to the frame of the main body.

  As an example of such a fitting member, Patent Document 1 discloses a structure for fitting pipes having different diameters. This method provides a large locking force that does not easily disengage, but the number of parts is large and the structure is complicated, and the fitting method is complicated accordingly. Yes.

  Further, Patent Document 2 discloses a fixing tool for a rod-like body that can fasten a rod-like body such as a pipe lattice, a shelf, or a handrail in a horizontal and vertical direction easily and reliably. However, the technique disclosed here also has the same problem as in Patent Document 1.

  FIG. 4 is a cross-sectional view schematically showing an example of a fitting member having a simple structure other than the method disclosed in the patent document. In FIG. 4, 9a and 9b are circular tubular members that are obliquely divided into two, 10 is a female screw, 11 is a bolt, and 12 is a circular tubular member. In this example, one of the two divided tubular members 9a is provided with a female screw, and the two divided tubular members 9a and 9b are divided by a tightening force when the bolt 11 is screwed into the female screw. On the surface, a component force in a direction perpendicular to the axis of the bolt is generated, so that a locking force between the two divided tubular members 9a, 9b and the tubular member 12 can be secured.

  However, in this structure, since there are few contacts between the tubular member 12 and the two divided tubular members 9a and 9b, the axis of the bolt 11 and the axis of the tubular member 12 become non-parallel, and as a result. The two tubular members are in point contact and have a drawback that a sufficient locking force cannot be obtained.

  Japanese Patent Laid-Open No. 7-019211   JP 2002-276630 A

  Accordingly, an object of the present invention is to provide a fitting member having a simple structure in which a rod-like member is inserted into a tubular member, having a large locking force and little loosening during use.

  The inventor has reviewed the structure in which the screw tightening force in the axial direction is loaded as a force in the direction perpendicular to the axis using the inclined surface, and as a result, the circular tubular member on the insertion side is divided into three parts. Thus, the inventors have conceived that the above problems can be solved, and have made the present invention.

  That is, according to the present invention, the first tubular member and the tubular member having an outer diameter smaller than the inner diameter of the first tubular member are divided into three parts by two dividing surfaces that are not parallel to each other and are not orthogonal to the axis. A fitting member having a second tubular member and a bolt inserted through the second tubular member, and one end of the second tubular member divided into three parts A bottom surface provided with a female screw corresponding to the bolt is formed at an end portion of the member facing the split surface, and the bolt is inserted into an end portion of the other end member facing the split surface. The fitting member is characterized in that a bottom surface provided with a hole having a possible inner diameter is formed.

  In the fitting member according to the present invention, the second circular tubular member is non-parallel to each other and is divided into three parts by two dividing surfaces that are not orthogonal to the shaft, so that the tightening force by the bolt becomes a three-way component force. Thus, it becomes a force for pushing the inner circumference of the first tubular member separately. For this reason, even if the bolt is tightened, the axis of the bolt and the axis of the tubular member are kept parallel, and the inner periphery of the first tubular member and the outer periphery of the second tubular member are in contact with each other by a line or surface. It becomes like this.

  Therefore, the fitting member of the present invention has a large area where the two tubular members come into contact with each other, and a sufficient frictional force for securing the fitting portion is obtained and securely locked.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an example of a second circular tubular member in the fitting member of the present invention. In FIG. 1, 1 is a second tubular member, 1a, 1b and 1c are divided pieces, 2 is a female screw, 3 is an insertion hole, and 4 is a bolt.

  In this example, the insertion hole 3 is set to be larger than the outer diameter of the bolt 4, and the female screw 2 is processed so that the diameter and pitch correspond to the male screw of the bolt 4. Further, the divided surfaces of the divided pieces 1a, 1b, and 1c include the midpoint of the axis of the piece 1b and are set to be plane-symmetric with respect to a plane perpendicular to the axis.

  FIG. 2 is a cross-sectional view schematically showing a fitting state of the fitting member of the present invention. In FIG. 2, 5 is a first tubular member. When fitting, as shown in this figure, the bolt 4 is inserted into the divided pieces 1a, 1b, 1c, and the male screw of the bolt 4 and the female screw 2 of the piece 1a are screwed together. Insert into one tubular member 5 and tighten bolt 4.

  When the bolts 4 are tightened, the pieces 1a and 1c are moved by the force in the direction of the vertical arrow shown in FIG. 2, respectively, but the dividing surface is inclined, so that the horizontal direction shown in FIG. A force is generated in the direction of the arrow. Accordingly, the pieces 1a and 1c are pressed against the inner periphery of the left first tubular member 5 in FIG. 2, and the pieces 1b are pressed against the inner periphery of the right first tubular member 5 in FIG.

  In addition, since each piece contacts the first tubular member 5 with a line or surface, the axis of the bolt 4 does not tilt with respect to the axis of the first tubular member 5. Accordingly, the first tubular member 5 and the second tubular member 1 are firmly locked, and the occurrence of loosening during use is extremely reduced.

  FIG. 3 is a view showing an example in which the fitting member of the present invention is applied to attachment of a wheelchair part. In FIG. 3, 6 is a metal pipe constituting the frame of the wheelchair and corresponds to the first tubular member in FIG. In addition, 7 is a pedal, 8 is a joining member for integrating the pedal 7 and the second tubular member 1, and this joining member 8 joins the piece 1c and the pedal 7 in FIG. .

  In general, parts such as this kind of pedal are loaded with a user's weight and accidental disengagement may lead to an accident, so it is necessary to be surely locked. The present invention is useful for ensuring the fitting and locking of the members as in this example.

  As described above, according to the present invention, it is possible to obtain a fitting member that can improve the locking reliability of the tubular member with a simple structure. The present invention can be expected to be applied to various products other than the above examples, and is very useful industrially. It should be noted that the present invention is not limited to the specific examples described above, and any design changes that do not depart from the gist of the present invention are included in the present invention. That is, it includes various modifications and corrections that can be conceived by those who have ordinary knowledge in this technical field.

  The perspective view which shows an example of the fitting member of this invention   Sectional drawing which showed the fitting state of the member for fitting of this invention typically   The figure which shows the example which applied the member for fitting of this invention to the attachment of the components of a wheelchair   Sectional drawing which shows the example of a fitting member typically

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 2nd circular tubular member 1a, 1b, 1c Divided piece 2,10 Female screw 3 Insertion hole 4,11 Bolt 5 First tubular member 6 Metal pipe 7 Pedal 8 Joint member 9a, 9b Divided circle Tubular member 12 Circular tubular member

Claims (1)

  A first tubular member and a tubular member having an outer diameter smaller than the inner diameter of the first tubular member, divided into three by two dividing surfaces which are not parallel to each other and are not orthogonal to the axis; And a fitting member having a bolt formed by being inserted through the second tubular member, and a divided surface of the second tubular member at one end of the third divided member. A bottom surface provided with a female screw corresponding to the bolt is formed at the end facing the bolt, and a hole having an inner diameter through which the bolt can be inserted is formed at the end facing the split surface in the other end member. A fitting member, wherein a provided bottom surface is formed.

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