JP2017096462A - Fixation mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress play of a handrail member which is attached to a base material, and to easily remove the handrail from the base material.SOLUTION: When a round pipe 14a of a handrail member is inserted into a round pipe 12a of a base material, and a handle 16a is rotated in a fastening direction, a bolt 16b is screwed to a nut 123b. When the handle 16a is continued to be rotated in the state, a tip of the bolt 16b arrives at the round pipe 14a via a through- hole HL1a, and an outer peripheral face of the round pipe 14a is brought into pressure-contact with an inner peripheral face of the round pipe 12a. When the handle 16a is further rotated, a surface of a tip part of a tong piece 122b comes into contact with a rear surface of a tip part of a skirt 14c by a reaction force of the pressurized contact.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a fixing mechanism, and in particular, a base material having a pipe and a first positioning member, a fixed member having an insertion member and a second positioning member inserted into the pipe, and fixing the fixed member to the base material The present invention relates to a fixing mechanism including a fixing member.

  An example of this type of mechanism is disclosed in Patent Document 1. According to this document, in order to attach the pipe-shaped handrail (fixed member) to the vehicle body, the handrail attachment portion (base material) is provided on the side portion of the vehicle body. A spacer including a base portion and a guide portion is installed on the handrail attachment portion. The spacer has flexibility, and the outer diameter of the base portion is slightly larger than the inner diameter of the handrail, and the outer diameter on the distal end side of the guide portion is smaller than the inner diameter of the handrail. When the handrail is pushed in from the guide part side of the spacer, the base is bent so that the diameter of the hand is elastically reduced, and the handrail is fitted to the spacer, and the handrail is attached to the vehicle body in a state where the inner periphery and the outer periphery of the base are pressed against each other. . Thereby, shakiness of the handrail can be suppressed.

Japanese Patent Laying-Open No. 2015-80568

  However, in the structure of Patent Document 1, since a frictional force acts between the inner periphery of the handrail and the outer periphery of the base portion, removal of the handrail is prevented by the base portion.

  Therefore, a main object of the present invention is to provide a fixing mechanism that can easily remove a member to be fixed from a base material while suppressing rattling of the member to be fixed.

  The fixing mechanism according to the present invention includes a pipe extending along the first axis, and a first positioning member provided at a position overlapping at least a part of the outer peripheral surface of the pipe when viewed from the radial direction of the first axis. A base material having an insertion member that extends along the second axis and is inserted into the pipe, and is provided at a position overlapping with at least a part of the outer peripheral surface of the insertion member when viewed from the radial direction of the second axis A fixed member having a second positioning member that covers at least a part of the first positioning member when the member is inserted into the pipe, a columnar member, and the columnar member extending outside the columnar member as viewed from the length direction; A fixing mechanism including a fixing member having a supporting member that supports a base end of the columnar member, wherein the length of the columnar member exceeds the distance from the surface of the second positioning member to the inner peripheral surface of the pipe, The tip is the inner circumference of the pipe Missing part of the order to reach a pipe, it is formed in each of the first positioning member and the second positioning member.

  When the insertion member provided on the fixed member is inserted into the pipe provided on the base material, and the tip of the columnar member provided on the fixing member reaches the inner peripheral surface of the pipe, that is, the outer peripheral surface of the insertion member through the missing portion External force is applied to the insertion member, and the outer peripheral surface of the insertion member is pressed against the inner peripheral surface of the pipe. The rattling of the fixed member is suppressed by surface contact between the insertion member and the pipe.

  Accordingly, it is not necessary to provide another member for suppressing rattling, and the removal of the fixed member is not prevented by such a member. As a result, the member to be fixed can be easily detached from the base material.

  The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

(A) is an external view which shows a certain external appearance of the assist grip by which the fixing mechanism of this invention was employ | adopted, (B) is an external view which shows the other external appearance of the said assist grip. (A) is an external view which shows a certain external appearance of the base material which comprises an assist grip, (B) is an external view which shows the other external appearance of the said base material. (A) is an external view which shows a certain external appearance of the handrail member which comprises an assist grip, (B) is an external view which shows the other external appearance of the said handrail member. (A) is an external view which shows a certain external appearance of the fixing member which comprises an assist grip, (B) is an external view which shows the other external appearance of the said fixing member. It is an illustration figure which shows a part of process of fixing a handrail member to a base material. It is an illustration figure which shows a part of other process of fixing a handrail member to a base material. It is an illustration figure which shows the other part of the process of fixing a handrail member to a base material.

  Referring to FIGS. 1A to 1B, an assist grip 10 according to this embodiment includes an iron base 12 fixed to a vehicle and an iron handrail member (fixed) attached to the base 12. Member) 14 and a fixing member 16 for fixing the handrail member 14 to the substrate 12.

  Referring to FIGS. 2A to 2B, the base 12 is formed integrally with the round pipe 12a having the axis AX1 as a central axis and the round pipe 12a at one end of the round pipe 12a. And a positioning member 12b that defines the rotational position of the handrail member 14. The positioning member 12b is formed by a flange 121b, a tongue piece 122b, and a nut 123b.

  The flange 121b has an outer diameter that exceeds the outer diameter of the round pipe 12a, and is provided at one end of the round pipe 12a. Further, the tongue piece 122b protrudes from the flange 121b to the outside in the radial direction of the round pipe 12a, and is curved to the other end side of the round pipe 12a. When viewed from the radially outer side of the round pipe 12a, the outer peripheral surface of the round pipe 12a partially overlaps the tongue piece 122b.

  The front surface of the tongue piece 122b faces the radially outer side of the round pipe 12a, and the rear surface of the tongue piece 122b faces the radially inner side of the round pipe 12a. Both the front surface and the back surface of the tip are flat surfaces, and the dimensions of the flat surface are the same between the front surface and the back surface. The nut 123b is disposed on the back surface of the front end portion of the tongue piece 122b with the axis AX2 orthogonal to the axis AX1 as a central axis so as to be screwed with a bolt 16b described later.

  Considering the presence of such a nut 123b, the round pipe 12a is formed with a through hole (missing portion) HL1a having the axis AX2 as a central axis. Similarly, a through hole (missing portion) HL1b that communicates with the nut 123b about the axis AX2 as a central axis is also formed at the tip of the tongue piece 122b. The inner diameter of each of the through holes HL1a and HL1b is slightly larger than the outer diameter of the bolt 16b.

  3A to 3B, the handrail member 14 includes a round pipe (insertion member) 14a having an axis AX1 'as a central axis, and a round pipe in a predetermined direction from one end of the round pipe 14a. A handrail grip 14b that covers 14a, and a positioning member 14c that is provided below the handrail grip 14b on the round pipe 14a and defines the rotational position of the handrail member 14.

  Here, the outer diameter of the round pipe 14a is slightly lower than the inner diameter of the round pipe 12a described above, and the outer diameter of the flange 121b is larger than the outer diameter of the round pipe 12a (see FIG. 5). Further, the positioning member 14c is formed in a skirt shape so as to overlap the outer peripheral surface of one end of the round pipe 14a when viewed from the outside in the radial direction of the round pipe 14a. Furthermore, the round pipe 14a and the positioning member 14c are integrally formed. Hereinafter, the positioning member 14c is appropriately referred to as a “skirt 14c”.

  The front surface and the back surface of the tip portion of the skirt 14c face the outer side and the inner side in the radial direction of the round pipe 14a, respectively. Of these, if a part of the front surface and a part of the back surface intersecting the axis AX2 ′ are defined as “specific surface” and “specific back surface”, respectively, the specific surface and the specific back surface are both flat surfaces, and the dimensions of the flat surface Match between a specific surface and a specific back surface.

  Moreover, the dimension of the flat surface which a specific surface or a specific back surface makes is a little larger than the dimension of the flat surface which the surface or back surface of the front-end | tip part of the tongue piece 122b makes. Furthermore, the distance from the specific back surface to the outer peripheral surface of the round pipe 14a slightly exceeds the distance from the surface of the tip of the tongue piece 122b to the inner peripheral surface of the round pipe 12a (see FIG. 5).

  Cutouts (missing portions) CT1 and CT2 are formed in the skirt 14c. The notches CT1 and CT2 are formed by cutting the skirt 14c broadly along the axis AX1 'from the edge of the tip of the skirt 14c. The positions where the notches CT1 and CT2 are formed overlap with the axis AX2 ', and the widths of the notches CT1 and CT2 are slightly larger than the outer diameter of the bolt 16b. Further, the notches CT1 and CT2 both reach the specific back surface from the specific surface.

  Therefore, when the round pipe 14a is inserted into the round pipe 12a, the axis AX1 ′ substantially overlaps the axis AX1, and the outer peripheral surface of the round pipe 14a faces the inner peripheral surface of the round pipe 12a. When the rotation angle of the handrail member 14 is adjusted so that the axis AX2 ′ overlaps the axis AX2, the positioning member 12b is covered by the positioning member 14c, that is, the skirt 14c. The flat surface formed by the specific back surface of the tip portion of the skirt 14c is opposed to the flat surface formed by the surface of the tip portion of the tongue piece 122b, leaving a slight gap.

  4A to 4B, the fixing member 16 includes a handle (support member) 16a and a columnar bolt (columnar member) 16b having a base end supported by the handle 16a. Composed. Both the handle 16a and the bolt 16b are centered on the axis AX2 ″. When viewed from the length direction of the axis AX2 ″, the handle 16a spreads outside the bolt 16b.

  Further, the length of the bolt 16b (= the distance from the tip surface of the cylindrical portion formed on the back surface of the handle 16a to the tip surface of the bolt 16b) is the inner peripheral surface of the round pipe 12a from the specific surface of the tip portion of the skirt 14c. (See FIG. 5).

  Therefore, the round pipe 14a of the handrail member 14 is inserted into the round pipe 12a of the base member 12 so that the axis AX2 'overlaps the axis AX2, and the bolt 16b is cut out in such a posture that the axis AX2 "overlaps the axes AX2 and AX2'. Or if it arrange | positions to CT2 and rotates the handle | steering-wheel 16a to the surroundings direction (tightening direction) of the axis | shaft AX2 ", the volt | bolt 16b will screw together with the nut 123b.

  When the handle 16a is continuously rotated in this state, the tip of the bolt 16b reaches the round pipe 14a through the through hole HL1a, and the outer peripheral surface of the round pipe 14a is pressed against the inner peripheral surface of the round pipe 12a (see FIG. 6). ). Shaking of the handrail member 14 is suppressed by surface contact between the round pipe 12a and the round pipe 14a.

  As described above, the distance from the specific back surface of the tip portion of the skirt 14c to the outer peripheral surface of the round pipe 14a slightly exceeds the distance from the surface of the tip portion of the tongue piece 122b to the inner peripheral surface of the round pipe 12a. Therefore, in the tightened state shown in FIG. 6, a very slight gap remains between the specific back surface of the tip portion of the skirt 14c and the surface of the tip portion of the tongue piece 122b.

  When the handle 16a is further rotated, the surface (flat surface) of the tip of the tongue piece 122b and the specific back (flat surface) of the tip of the skirt 14c come into contact with each other due to the reaction force of the pressure contact (see FIG. 7). The rotation of 14 is suppressed. Further, since the pressure contact force further increases, a user feels moderation by rotating the handle 16a, thereby preventing damage to the member due to excessive tightening.

  Further, in this embodiment, since the rattling of the handrail member 14 is suppressed by surface contact, it is not necessary to provide a special member for suppressing the rattling, and the handrail member 14 can be removed by such a member. There is no hindrance. That is, by releasing the tightening by the handle 16a, the frictional force between the round pipe 12a and the round pipe 14a is reduced, and the handrail member 14 can be easily detached from the base material 12.

DESCRIPTION OF SYMBOLS 10 ... Assist grip 12 ... Base material 14 ... Handrail member (fixed member)
16: Fixing member 12a: Round pipe (pipe)
12b ... positioning member (first positioning member)
14a ... Round pipe (insertion member)
14b ... handrail grip 14c ... positioning member (second positioning member)
16a ... handle (support member)
16b ... bolt (columnar member)
HL1a, HL1b ... through hole (missing part)
CT1, CT2 ... Notch (missing part)

Claims (1)

A base material having a pipe extending along the first axis, and a first positioning member provided at a position overlapping with at least a part of the outer peripheral surface of the pipe when viewed from the radial direction of the first axis;
An insertion member extending along the second axis and inserted into the pipe; and provided at a position overlapping at least a part of the outer peripheral surface of the insertion member when viewed from the radial direction of the second axis, and the insertion A fixed member having a second positioning member that covers at least a part of the first positioning member when the member is inserted into the pipe, a columnar member, and the columnar member as viewed from the length direction of the columnar member; A fixing mechanism including a fixing member that extends outward and has a support member that supports a base end of the columnar member,
The length of the columnar member exceeds the distance from the surface of the second positioning member to the inner peripheral surface of the pipe,
A fixing mechanism in which a missing portion for allowing the end of the columnar member to reach the inner peripheral surface of the pipe is formed in each of the pipe, the first positioning member, and the second positioning member.

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