JP6563670B2 - Mounting member - Google Patents

Description

  The present invention relates to an attachment member attached to a body to be attached.

  There is a case where the attachment member is attached to a place such as a leg end of the furniture that comes into contact with the installation surface of the furniture. For example, by attaching a synthetic resin mounting member to a leg portion of a metal chair, it is possible to suppress scratches on the installation surface.

  As such an attachment member, Patent Literature 1 proposes a cap attached to an end portion of a pipe constituting a leg of furniture. In this cap, a plurality of longitudinal elastic convex portions 7 are provided in the fitting portion to be inserted into the pipe, thereby preventing the cap from easily coming off the pipe.

JP 2002-136369 A

  In the conventional attachment member, the positional accuracy of the attachment to the leg portion is not sufficient, and the attachment member may be attached in a tilted state with respect to the leg portion. In that case, there is a risk that loosening is likely to occur and the mounting member is likely to fall off the leg portion. Further, when the vertical length of the contact portion (cap base portion 11 in Patent Document 1) that comes into contact with the floor surface becomes long, when attached in a tilted state, the leg portion extends to the tip of the contact portion. There was a risk that the displacement would increase and the load capacity in the vertical direction would not be sufficient or the aesthetics could be impaired.

  An object of the present invention is to propose an attachment member that can be attached with high positional accuracy.

  The invention made in order to solve the above-mentioned problem is an attachment member attached to a to-be-attached body. This attachment member is a columnar member having a length in a predetermined direction, and includes an insertion portion that is inserted into an insertion hole formed in the attached body.

  The insertion portion is provided in a first region, which is a region within a predetermined range with respect to the predetermined direction, and a plurality of first protrusions protruding outward from the outer surface of the insertion portion, and the first portion with respect to the predetermined direction. A plurality of second protrusions that are provided in a second region that is a region that does not overlap with one region and project outward are provided.

Then, in a state where the insertion portion is inserted into the insertion hole, the first protrusion and the second protrusion come into contact with the wall surface constituting the insertion hole.
The mounting member configured in this way has protrusions provided in two regions having different positions with respect to a predetermined direction that is the length direction of the insertion portion. Compared with a configuration in which only the protrusions extending in two regions and having the same protrusion amount are provided, the positional accuracy when the insertion portion is inserted into the insertion hole is increased. Thereby, it is suppressed that the attachment member is attached in the state which inclined.

  The insertion portion is formed with a plurality of protrusions having a length in the predetermined direction and protruding outward, and the protrusions are provided with the first protrusion and the second protrusion. It is good also as composition which has.

If it is such a structure, inclination suppression at the time of insertion operation | movement and reinforcement | strengthening of a protrusion are implement | achieved by a protrusion, and the positional accuracy of an attachment member can be improved.
In addition, the first region projected onto the plane having the normal direction as the predetermined direction and the second region projected onto the plane have a portion that does not fit within the cross section of the opening of the insertion hole. The portion projected on the plane where the protrusions are formed in the insertion portion, excluding the first region and the second region, has a shape that fits within the cross section of the opening. It is good.

  With such a configuration, the first protrusion and the second protrusion are in good contact with the wall surface constituting the insertion hole, while the portions other than the first protrusion and the second protrusion in the ridge do not make strong contact with the wall surface, The improvement of the positional accuracy by the protrusion can be preferably realized.

  In addition, the first protrusion is formed with an inclined portion that is inclined in the direction opposite to the insertion direction toward the outer direction on the surface on the insertion direction side when the insertion portion is inserted into the insertion hole. It may be a configuration.

Still further, the second protrusion may be configured such that an inclined portion that is inclined in the direction opposite to the insertion direction toward the outer direction is formed on the surface on the insertion direction side.
By forming the inclined portion in this way, the insertion portion can be smoothly inserted into the insertion hole. Moreover, when inserting an insertion part, it can suppress that the 1st protrusion and the 2nd protrusion generate | occur | produce the unintended damage, As a result, it can suppress that an attachment member will be attached in the state inclined.

It is a figure explaining the attachment member of this embodiment, Comprising: FIG. 1 (A) is a top view, FIG.1 (B) is a front view. 2A is a cross-sectional view taken along the line AA in FIG. 1A, FIG. 2B is a cross-sectional view taken along the line BB in FIG. 1B, and FIG. ) Is a cross-sectional view taken along the line CC of FIG. 2, and FIG. 2D is a cross-sectional view taken along the line DD of FIG. 3A is a bottom view of the leg portion 3, and FIGS. 3B and 3C are side views illustrating attachment of the attachment member to the leg portion. 4A is a diagram in which a portion indicated by an arrow F in FIG. 3C is projected onto a plane whose normal direction is the protruding direction, and FIG. 4B is a diagram in FIG. It is the figure which the part shown with the arrow G in in projected. It is a figure which shows the modification of a 1st protrusion and a 2nd protrusion. It is a figure explaining the shape of the 1st projection and the 2nd projection.

Embodiments of the present invention will be described below with reference to the drawings.
[Embodiment]
(1) Structure of attachment member The attachment member 1 of this embodiment is demonstrated using FIGS. 1-2. The attachment member 1 is formed of a synthetic resin, and is used by being attached to a leg portion of an attached body. The attachment member 1 includes a contact portion 11 that comes into contact with an installation surface such as a floor surface on which the body to be attached is installed, a predetermined projecting direction from the contact portion 11 (an arrow E direction in FIG. 1B, a predetermined direction in the present invention). And an insertion portion 13 which is a columnar member having a length in that direction. Examples of the attached body include furniture such as a desk and a chair.

  The contact portion 11 has a cylindrical shape, and the insertion portion 13 protrudes along the length direction from one end in the length direction. That is, the protruding direction of the insertion portion 13 is the same direction as the length direction of the contact portion 11. Moreover, the other end different from the one end mentioned above of the contact part 11 becomes the contact surface 11a which contacts an installation surface.

  The insertion portion 13 has a substantially cylindrical shape in appearance, but has a space inside. The insertion portion 13 connects the outer cylindrical portion 13a, the middle shaft portion 13b having a length along the central axis of the cylindrical portion 13a, and the tubular portion 13a and the middle shaft portion 13b, and extends in the protruding direction. Plate-like connecting portion 13c.

  The insertion portion 13 is arranged on the outer peripheral surface of the cylindrical portion 13a with a certain interval in the circumferential direction, has a length in the protruding direction, and protrudes outward from the outer surface of the insertion portion 13 (this Eight (8) protrusions 15 are formed in the embodiment. Hereinafter, the outward direction means the above-described direction. The outward direction is the same direction as the direction away from the central axis of the insertion portion 13.

  The ridges 15 extend from the first region 21 to the second region 23 having an interval in the protruding direction. The first area 21 is an area in a predetermined range with respect to the protruding direction (area where the distance from the contact portion 11 regarding the protruding direction is within a predetermined range), and the second area 23 is the first area with respect to the protruding direction. The first region 21 is a region that does not overlap and is closer to the contact portion 11 than the first region 21.

  The insertion portion 13 is provided with a plurality of first protrusions 31 provided in the first region 21 and protruding outward, and a plurality of second protrusions 33 provided in the second region 23 and protruding outward. ing. The first protrusion 31 and the second protrusion 33 are provided on the protrusion 15, and the protrusion amount from the insertion portion 13 is larger than the area between the first area 21 and the second area 23 of the protrusion 15. Yes.

  The first protrusion 31 is formed with an inclined portion 31a, which is a surface inclined in the opposite direction of the protruding direction toward the outer side, on the surface on the tip side in the protruding direction. Further, the second protrusion 33 is formed with an inclined portion 33a, which is a surface inclined in the opposite direction of the protruding direction toward the outer side, on the surface on the tip side in the protruding direction. In the present embodiment, the inclined portion 31a and the inclined portion 33a are illustrated as having a planar shape, but may be curved surfaces, that is, so-called R shapes. By the way, the surface on the distal end side in the protruding direction described above can be restated as the surface on the insertion direction side when the insertion portion 13 is inserted into the insertion hole 3a.

2A and 2C, the sections of the first protrusion 31 and the second protrusion 33 where the inclined portions 31a and 31b are not formed have the same shape.
(2) Usage Mode of Mounting Member A usage mode of the mounting member 1 will be described with reference to FIGS. FIG. 3A is a bottom view of the leg portion 3, and FIGS. 3B and 3C are side views of the attachment member 1 and the leg portion 3.

  The attachment member 1 is attached to the leg portion 3. The end portion of the leg portion 3 has a pipe shape with a constant inner diameter and outer diameter, and is formed with a cylindrical insertion hole 3a. The insertion portion 13 can be inserted into the insertion hole 3a, and the attachment member 1 is attached to the leg portion 3 by inserting the insertion portion 13 into the insertion hole 3a from the opening 3c.

In a state where the insertion portion 13 is inserted into the insertion hole 3a, the first protrusion 31 and the second protrusion 33 are in contact with the wall surface 3b constituting the insertion hole 3a.
The relationship between the size of the insertion portion 13 and the insertion hole 3a will be described with reference to FIGS. 4A and 4B show the respective portions of the insertion portion 13 and the leg portion 3 projected on a plane whose normal direction is the protruding direction. The insertion portion 13 has a wall surface 3b of the leg portion 3. The state which has not received the compression deformation by contacting is shown.

  FIG. 4A is a projection of the portion indicated by the arrow F in FIG. An arrow F points to a portion of the first region 21 or the second region 23 of the insertion portion 13. As shown in FIG. 4A, in the first region 21, the portion of the first protrusion 31 does not fit in the insertion hole 3a and protrudes outside the insertion hole 3a. In addition, since the projection drawing of the 1st area | region 21 and the 2nd area | region 23 is the same shape, description of the 2nd area | region 23 is omitted.

  FIG. 4B is a diagram in which a portion indicated by an arrow G in FIG. As shown in FIG. 4B, the portion of the insertion portion 13 where the protrusions 15 are formed, except for the first region 21 and the second region 23, is accommodated in the insertion hole 3a.

As can be seen from FIGS. 4A and 4B, the outer diameter of the portion excluding the protrusion 15 of the cylindrical portion 13a is sufficiently smaller than the width of the insertion hole 3a, that is, the inner diameter of the pipe. .
As described above, since the first protrusion 31 and the second protrusion 33 protrude wider than the inner diameter of the pipe, the first protrusion 31 and the second protrusion 33 are wall surfaces when the insertion portion 13 is inserted into the insertion hole 3a. Contact 3b. Since the insertion portion 13 is compressed in the direction of the central axis, these protrusions come into strong contact with the wall surface 3b due to elastic repulsion.

  Further, even in the portion of the protrusion 15, the portion where the first protrusion 31 and the second protrusion 33 are not formed is slightly smaller than the inner diameter of the pipe and does not come into strong contact with the wall surface 3b. .

(3) Effect The attachment member 1 can suppress the axis of the insertion part 13 from being inclined with respect to the axis of the insertion hole 3a (the axis of the leg part 3) when attached to the leg part 3. 3 can be attached with high positional accuracy by suppressing the contact portion 11 from being inclined.

  This is because the insertion portion 13 has protrusions formed in the first region 21 and the second region 23 spaced apart in the protruding direction, so that the first protrusion 31 in the first region 21 is inserted into the insertion hole 3a. This is because even if the attachment member 1 is inclined during insertion in the state, the inclination is corrected when the second protrusion 33 in the second region 23 is inserted, and the attachment member 1 returns to the correct position.

  Further, the insertion portion 13 is strongly subjected to the load from the wall surface 3 b at the first protrusion 31 and the second protrusion 33. On the other hand, if it is assumed that only a flat ridge having a length in the protruding direction is formed, it is impossible to adjust which position of the ridge is strongly loaded with that configuration. When a load is strongly applied to the central portion in the protruding direction, inclination is more likely to occur than when applied to the two points of the front end and the rear end.

  In addition, in the configuration in which only the flat ridge is formed, the ridge is easily affected by the shaving of the ridge and the processing error that occurs when the insertion portion is inserted into the insertion hole of the mounted body. The point at which the load is strongly applied is likely to change, and it is difficult to suppress the occurrence of looseness and inclination of the insertion portion. The mounting member 1 according to the present embodiment hardly causes such a problem, and can suppress the occurrence of inclination.

  Moreover, since only the 1st protrusion 31 and the 2nd protrusion 33 are located outside the diameter of the insertion hole 3a and the attachment member 1 contacts the wall surface 3b preferentially, the improvement of the positional accuracy mentioned above is suitable. Can be realized.

  Moreover, since the protrusion 15 is formed in the attachment member 1, the positional accuracy of attachment can be improved also by it. This is because, when the insertion portion 13 is tilted in the process from the state in which the first protrusion 31 is inserted into the insertion hole 3a until the second protrusion 33 is inserted into the insertion hole 3a, the protrusion 15 contacts the wall surface 3b. Therefore, the inclination of the contact part 11 with respect to the leg part 3 will be suppressed, and it is suppressed that an insertion operation is advanced in the inclined state.

  If the insertion portion 13 is inserted in a tilted state, a part of the plurality of first protrusions 31 may be locally scraped or the insertion portion 13 may be biased and compressed, leading to a decrease in position accuracy. . On the other hand, since the attachment member 1 of this embodiment suppresses the inclination at the time of insertion by the protrusion 15, it can suppress the fall of position accuracy.

  Moreover, since the inclined part 31a and the inclined part 33a are formed in the 1st protrusion 31 and the 2nd protrusion 33, the insertion part 13 can be smoothly inserted in the insertion hole 3a. Moreover, when the insertion part 13 is inserted, it can suppress that the 1st protrusion 31 and the 2nd protrusion 33 produce unintentional damage, and can suppress that the contact part 11 inclines.

[Other Embodiments]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various forms can be taken as long as they belong to the technical scope of the present invention.

  (A) The present invention may have a configuration in which some elements of the above embodiment are omitted. Specifically, a configuration in which some of the elements such as the ridge 15, the inclined portion 31a, and the inclined portion 33a are omitted may be employed.

  (B) The arrangement of the protrusions is not limited to the above embodiment. For example, as shown in FIG. 5A, the first protrusion 51 and the second protrusion 53 may be provided so as not to be bent side by side in the protruding direction but shifted in the circumferential direction.

  Further, as shown in FIG. 5B, a plurality of first protrusions 71 and second protrusions 73 are provided in each of two regions (first region 61 and second region 63) spaced in the protruding direction. In this case, the protrusions may be arranged so as to be shifted with respect to the protruding direction inside each region.

  Also, in the intermediate region 65 between the first region 61 and the second region 63, although not shown, a protrusion may be provided. Here, the protrusion is a protrusion protruding in the same direction as the first protrusion and the second protrusion. However, if the intermediate region 65 is not provided with a protrusion, the effect of improving the positional accuracy during insertion by the first protrusion and the second protrusion can be more satisfactorily achieved.

  (C) The insertion portion 13 and the insertion hole 3a corresponding to the insertion portion 13 may be columnar and are not limited to a columnar shape. The column shape here is a shape having a length in a predetermined direction, and its extending length and cross-sectional shape are not particularly limited, and attachment is possible by inserting the insertion portion 13 into the insertion hole 3a. Any shape is acceptable. For example, the insertion portion 13 may have a substantially prismatic shape, a columnar shape having an elliptical cross section, or a truncated cone shape or a truncated pyramid shape that becomes narrower in the protruding direction.

  (D) The first protrusion and the second protrusion may have a shape having a length in the circumferential direction in the first region 21 and the second region 23. Further, the cross-sectional shape is not limited to a rectangular shape, and may be a circle or an ellipse.

  However, as the circumferential length of each protrusion increases, the circumferential length of the protrusion that contacts the wall surface 3b increases, so that the circumferential position that receives the load most strongly from the wall surface 3b is controlled. It may be difficult. Therefore, as in the above-described embodiment, it is more convenient to control the position where the load is applied more strongly if the protrusions are provided separately in a plurality in the circumferential direction.

  For example, the shape of the cross-sections 81a and 83a perpendicular to the protruding direction of the truncated pyramid shaped protrusion 81 shown in FIG. 6A and the truncated cone shaped protrusion 83 shown in FIG. The length of I (the length direction of the insertion portion 13) and the length of the orthogonal direction H (the tangential direction of the circumference around the central axis of the insertion portion 13) are the same or the length of the orthogonal direction H It can be considered that the length is shorter. FIG. 6 is a perspective view schematically showing protrusions, and cross sections 81a and 83a are also schematic perspective views.

  (E) In the said embodiment, although the attachment member 1 which has the contact part 11 formed coaxially with the insertion part 13 was illustrated, the shape of the contact part 11 is not limited to what was mentioned above, The structure which does not have a corresponding part may be sufficient. For example, the present invention may be applied to a member provided with a caster instead of a contact portion, or a member provided with fixing means such as an insertion hole or a screw hole to which a caster or the like can be attached (so-called caster attachment sleeve or the like). .

  (F) In the above-described embodiment, the configuration in which the first protrusion 31 and the second protrusion 33 are press-fitted into the insertion hole 3a is illustrated. However, when the first protrusion 31 is inserted into the insertion hole 3a, the first protrusion 31 is formed by the end of the opening 3c. A configuration in which the protruding end of the second protrusion 33 is cut off may be employed. In other words, the protrusion height of the first protrusion 31 and the second protrusion 33 may be set on the assumption that the attachment member is scraped off by the end of the insertion hole 3a.

  In the mounting member in which the insertion portion is configured in this way, it is possible to suppress the looseness of fitting and the occurrence of breakage during the mounting process, and to increase the mounting accuracy. In the present invention, the first protrusion and the second protrusion are not provided, and only a plurality of flat protrusions having a length in the protrusion direction are formed, and the protrusions are inserted while being cut at the opening end. Assuming that, unevenness of the shaving of the ridge during insertion into the insertion hole is likely to occur, causing loosening. In addition, since a long time is required to apply a large pressure to cut the ridge, breakage tends to occur during insertion. However, the occurrence of such a problem can be suppressed by applying the present invention.

DESCRIPTION OF SYMBOLS 1 ... Mounting member, 3 ... Leg part, 3a ... Insertion hole, 3b ... Wall surface, 11 ... Contact part, 13 ... Insertion part, 15 ... Projection, 21 ... 1st area | region, 23 ... 2nd area | region, 31 ... 1st Projection, 31a ... inclined portion, 33 ... second projection, 33a ... inclined portion, 51, 71 ... first projection, 53, 73 ... second projection, 61 ... first region, 63 ... second region, 65 ... intermediate region , 81, 83 ... projections

Claims (4)

A mounting member attached to the mounted body,
A columnar member having a length in a predetermined direction, comprising an insertion portion to be inserted into an insertion hole formed in the attached body,
In the insertion part,
A plurality of first protrusions provided in a first region that is a region in a predetermined range with respect to the predetermined direction and projecting outward from the outer surface of the insertion portion;
A plurality of second protrusions that are provided in a second region that is a region that does not overlap the first region with respect to the predetermined direction, and that protrude in the outward direction;
Further, the insertion portion is formed with a plurality of ridges having a length in the predetermined direction and protruding in the outward direction, and the first protrusion and the second protrusion are provided on the protrusion. And
The mounting member, wherein the first protrusion and the second protrusion are in contact with a wall surface constituting the insertion hole in a state where the insertion portion is inserted into the insertion hole. The first region projected onto the plane having the normal direction as the predetermined direction and the second region projected onto the plane have a portion that does not fit within the cross section of the opening of the insertion hole. ,
The portion projected on the plane where the protrusions are formed in the insertion portion, excluding the first region and the second region, has a shape that fits within the cross section of the opening. The mounting member according to claim 1 . The first protrusion is formed with an inclined portion that is inclined in a direction opposite to the insertion direction toward the outer direction on a surface on an insertion direction side when the insertion portion is inserted into the insertion hole. The mounting member according to claim 1 or 2 , wherein Wherein the second protrusion, the surface of the insertion direction side, according to claim 3, characterized in that the inclined portion and the insertion direction toward the outer direction inclined in the opposite direction is formed Mounting member.

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