JP2006183781A - Coupling structure for member, and coupling pin used therein - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coupling structure for two members, and a coupling pin used therein providing easy carrying out of coupling work and uncoupling work. <P>SOLUTION: A fitting protruding part 14b formed on an upper end of an auxiliary leg 14 is inserted in a fitting recessed part 13b formed on a lower end of a leg body 13. First to third shaft parts 15a-15c of the coupling pin 15 are inserted in a first insertion hole 13c, a second insertion hole 14c, and a third insertion hole 13d formed on the lower end of the leg body 13 and the fitting protruding part 14b. An outer circumferential face of the second shaft part decentered from the first shaft part 15a is turned by turning an operation knob 15e to press the outer circumferential face against an inner circumferential face of the second insertion hole 14c and move the inner circumferential face upwards. By this, an upper end face 14a of the auxiliary leg 14 is pressed against a lower end face 13a of the leg body 13, and the leg body 13 and the auxiliary leg 14 are serially coupled. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a connecting structure for connecting two members to each other and a connecting pin used therefor.

  For example, when adjusting the length of the leg part of a chair or a table, the structure which connects an auxiliary leg part to a leg part main body is employ | adopted. As a connecting structure for connecting the leg main body and the auxiliary leg, a fitting convex formed on the upper end of the auxiliary leg is inserted into the fitting concave formed on the lower end of the leg main body, and the leg The wedge main body and the auxiliary leg are connected in series by driving the wedge into a wedge insertion hole formed laterally penetrating the lower end portion and the fitting convex portion of the main body.

  However, since the conventional structure of connecting the leg body and the auxiliary legs employs a structure for driving a wedge, there is a problem that not only the connection work is troublesome but also the connection release work is troublesome. .

  An object of the present invention is to provide a member connecting structure and a connecting pin used therefor, which can solve the problems in the prior art and can easily perform a connecting operation and a releasing operation.

  In order to solve the above problems, the invention according to claim 1 is characterized in that a fitting concave portion is formed in the first member, a fitting convex portion fitted in the fitting concave portion is provided in the second member, A first insertion hole is formed through the first member so as to communicate with the fitting recess from an outer surface thereof, and a second insertion hole is formed so as to correspond to the first insertion hole with respect to the fitting protrusion. And a first shaft portion inserted into the first insertion hole, a second shaft portion eccentrically connected to one end of the first shaft portion, and inserted into the second insertion hole, and the first shaft. A connecting pin is formed by a rotation operation unit that is provided at the other end of the unit and that rotates the first and second shafts, and the connection pin is inserted into the first insertion hole and the second insertion hole. In this state, the rotation operation portion of the connecting pin is operated to press the inner peripheral surface of the second insertion hole while turning the eccentric outer peripheral surface of the second shaft portion. And summarized in that which is adapted to connect the first member and the second member.

  According to a second aspect of the present invention, in the first aspect of the present invention, the third insertion formed in the tip of the second shaft portion on the same axis line so as to correspond to the first insertion hole in the first member. The gist is that a third shaft portion to be inserted into the hole is formed.

The gist of a third aspect of the present invention is that, in the first or second aspect, the rotation operation unit is an operation knob.
The gist of a fourth aspect of the present invention is that, in the first or second aspect, the rotating operation portion is a tool or a coin engaging groove formed on an end surface of the first shaft portion.

  According to a fifth aspect of the present invention, in the first or second aspect, the rotation operation portion is a plurality of engagement concave portions formed on the end surface of the first shaft portion, and is locked to the engagement concave portions. The gist of the present invention is to be rotated by a rotating operation tool having a plurality of engaging protrusions.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the outer peripheral surface of the second shaft portion of the connecting pin has an inclined portion whose amount of eccentricity increases as the distance from the first shaft portion increases. The gist is that is formed.

  The gist of the invention according to claim 7 is the connecting pin used for the connecting structure of members according to any one of claims 1 to 6.

  According to the present invention, the fitting convex part formed in the second member is inserted into the fitting concave part formed in the first member, and the first connecting pin is inserted into the first insertion hole and the second insertion hole. By inserting the shaft portion and the second shaft portion and rotating the rotation operation portion, the eccentric outer peripheral surface of the second shaft portion is pressed against the inner peripheral surface of the second insertion hole, and the first operation is performed. The member and the second member can be connected. Further, the connected state can be easily released by rotating the rotating operation unit in the opposite direction.

Hereinafter, an embodiment in which the present invention is embodied in a connecting structure of leg portions of a chair will be described with reference to FIGS.
As shown in FIG. 4, the chair 11 includes a butt rest portion 12, four leg main bodies 13 connected downward to the four corners of the butt rest section 12, and a connecting pin at the lower end of each leg main body 13. 15 and auxiliary legs 14 connected in series by 15. A reinforcing frame 16 is horizontally connected between the leg main bodies 13 of the chair 11. A backrest 17 is formed at the upper end of the two leg bodies 13 on the rear side (right side in FIG. 5) of the four leg bodies 13.

Next, based on FIG. 3, the said leg part main body 13 as a 1st member, the auxiliary leg part 14 as a 2nd member, and the connection pin 15 which connects both members in series are demonstrated.
A cylindrical fitting recess 13 b is formed on the lower end surface 13 a of the leg main body 13 so as to have a predetermined depth upward along the central axis of the leg main body 13. The lower end of the leg main body 13 is formed with a horizontal cylindrical first insertion hole 13c that communicates with the fitting recess 13b and opens in one outer plane. Further, a third cylindrical insertion hole 13d that communicates with the fitting recess 13b and opens to the other outer plane is formed at the lower end of the leg body 13 at the center of the first insertion hole 13c. It is formed so as to be located on the same axis as the axis.

  On the other hand, on the upper end surface 14a of the auxiliary leg portion 14, a cylindrical fitting convex portion 14b inserted into the fitting concave portion 13b of the leg main body 13 is integrally formed. A second insertion hole 14c having a horizontal cylindrical shape is formed in the middle height position of the fitting convex portion 14b. As shown in FIG. 1, the height H dimension of the fitting convex portion 14 b is set to be shorter than the depth D dimension of the fitting concave portion 13 b of the leg main body 13. Further, in the state where the fitting convex portion 14b of the auxiliary leg portion 14 is fitted into the fitting concave portion 13b of the leg portion main body 13, the positions of the central axes of the first and third insertion holes 13c, 13d and the second insertion The position of the central axis of the hole 14c is the same height, or the position of the central axis of the second insertion hole 14c is slightly lower than the positions of the central axes of the first and third insertion holes 13c, 13d. The position of each insertion hole is set so as to be the position.

  Next, the connecting pin 15 will be described. The connecting pin 15 includes a horizontal columnar first shaft portion 15a inserted into the first insertion hole 13c of the leg main body 13, and one of the first shaft portions 15a. A horizontal axis-shaped second shaft portion 15b that has a center axis O2 that is eccentric from the center axis O1 of the first shaft portion 15a with respect to the end surface and that is inserted into the second insertion hole 14c is provided. A horizontal cylindrical third shaft portion 15c that is inserted into the third insertion hole 13d is integrally formed on the distal end surface of the second shaft portion 15b. The central axis O3 of the third shaft portion 15c is set so as to be located on the same straight line as the central axis O1 of the first shaft portion 15a. Further, as shown in FIG. 3, the outer diameter D1 of the first shaft portion 15a is, for example, 20 mm, the outer diameter D2 of the second shaft portion 15b is, for example, 15.5 mm, and the outer diameter of the third shaft portion 15c. The D3 dimension is set to 10 mm, for example. Further, the diameter R1 dimension of the first insertion hole 13c is slightly larger than the outer diameter D1 of the first shaft portion 15a, for example, 20.5 mm, and the diameter R2 dimension of the second insertion hole 14c is equal to the second axis. The diameter R3 of the third insertion hole 13d is set to, for example, 10.5 mm, which is slightly larger than the outer diameter D3 of the third shaft portion 15c, for example, 16.5 mm, which is larger than the outer diameter D1 of the portion 15b. ing.

  A flange portion 15d having a diameter larger than the diameter R1 of the first insertion hole 13c is integrally formed on the base end surface of the first shaft portion 15a, and a rotation operation portion is provided on the outer surface of the flange portion 15d. The operation knob 15e is integrally formed.

Next, a method of connecting the leg main body 13 and the auxiliary leg 14 with the connecting pin 15 will be described.
As shown in FIG. 3, in the state where the auxiliary leg 14 is separated from the leg main body 13 and the connecting pin 15 is also separated, the fitting convex 14b of the auxiliary leg 14 is fitted into the fitting concave 13b of the leg main body 13. As shown in FIG. 1, the second insertion hole 14c of the fitting convex part 14b is made to correspond to the first and third insertion holes 13c, 13d of the leg body 13 as shown in FIG. Then, the first to third shaft portions 15a to 15c of the connecting pin 15 are inserted into the first insertion hole 13c, the second insertion hole 14c, and the third insertion hole 13d. At this time, the insertion is performed so that the center axis O2 of the second shaft portion 15b of the connecting pin 15 is positioned below the center axes O1 and O3 of the first shaft portion 15a and the third shaft portion 15c. In this state, when the operation knob 15e is turned, the outer peripheral surface S1 of the second shaft portion 15b is turned at the turning radius r (the eccentric distance of the center axes O1 and O2) about the center axes O1 and O3 in FIG. Therefore, the outer peripheral surface S1 is pivoted upward while being in sliding contact so as to push up the inner peripheral surface S2 of the second insertion hole 14c. As a result, the fitting convex portion 14b is lifted upward by the outer peripheral surface S1 of the second shaft portion 15b, the upper end surface 14a of the auxiliary leg portion 14 is pressed against the lower end surface 13a of the leg main body 13, and the leg main body 13 and The auxiliary legs 14 are connected in series. 1 and 2 show a state before the second shaft portion 15b is turned.

According to the connection structure of the above embodiment, the following effects can be obtained.
(1) In the above embodiment, the first to third shaft portions 15a to 15c formed on the connecting pin 15 are inserted into the first to third insertion holes 13c, 14c, and 13d of the leg main body 13 and the auxiliary leg portion 14, respectively. Then, by rotating the operation knob 15e, the inner peripheral surface S2 of the second insertion hole 14c is lifted upward by the outer peripheral surface S1 of the second shaft portion 15b, and the lower end surface 13a of the leg main body 13 is assisted. The upper end surface 14 a of the leg portion 14 is pressed to connect the leg main body 13 and the auxiliary leg portion 14. For this reason, compared with the conventional connection structure using a wedge, the connection operation | work of the leg part main body 13 and the auxiliary leg part 14 can be performed easily. Further, the connection release operation for releasing the connection state can be easily performed by rotating the operation knob 15e of the connection pin 15 in the opposite direction.

(2) In the above embodiment, since the first to third shaft portions 15a to 15c of the connecting pin 15 are formed in a columnar shape, each shaft portion can be easily manufactured using a lathe or the like.
(3) In the above embodiment, since the operation knob 15e to be gripped with a finger is provided on the connection pin 15, the rotation operation of the connection pin 15 can be easily performed without using a tool.

Next, another embodiment of the present invention will be described with reference to FIGS.
In this embodiment, as shown in FIGS. 9 and 10, the leg main body 13 is orthogonal to the square bar-shaped mounting frame 23 attached to the lower surface of the top plate 22 constituting the table 21 in a T shape. It is linked to. As shown in FIGS. 6 and 7, an ant portion 23 a that is engaged with an ant groove 22 a formed on the lower surface of the top plate 22 is formed on the upper surface of the mounting frame 23. Further, the fitting recess 23c, the first and third insertion holes formed in the lower surface 23b of the mounting frame 23 in the same manner as the fitting recess 13b and the first and third insertion holes 13c, 13d of the leg main body 13. 23d and 23e are formed. On the upper end surface 13e of the leg main body 13, a fitting convex portion 13f and a second insertion hole 13g similar to the fitting convex portion 14b and the second insertion hole 14c of the auxiliary leg portion 14 are formed.

  The mounting frame 23 and the upper end portion of the leg main body 13 are connected in a T shape by a connecting pin 15 as shown in FIG. The connecting structure between the leg main body 13 and the mounting frame 23 is the same principle as the connecting structure between the leg main body 13 and the auxiliary leg 14 shown in FIGS.

  As shown in FIG. 9, the intermediate portion of the leg main body 13 and the end of the reinforcing frame 16 are connected in a horizontal T shape when viewed in the horizontal direction by the connecting pin 15 and a connecting jig 28. The one end surface 16a of the reinforcing frame 16 has a fitting recess 16b similar to the fitting recess 13b, the first and third insertion holes 13c, 13d of the leg body 13, and the first and third insertion holes 16c, 16d. Is formed. An attachment hole 13h is formed in the leg main body 13 so as to correspond to the fitting recess 16b. The mounting hole 13h is formed in a taper shape having a smaller diameter as viewed from the side and closer to the reinforcing frame 16, and is formed in a substantially elliptical shape when viewed from the central axis direction of the mounting hole 13h. The connecting jig 28 is integrally formed at one end of the main body 28a and a horizontal cylindrical body 28a inserted into the fitting concave portion 16b and having the same function as the fitting convex portion 14b of the auxiliary leg portion 14. And it is comprised by the engaging part 28b inserted in the said attachment hole 13h, and the 2nd insertion hole 28c which has the same function as the 2nd insertion hole 14c of the said auxiliary | assistant leg part 14 formed in the said main body 28a. Yes.

Next, the operation | work which connects the leg part main body 13 and the reinforcement frame 16 shown in FIG. 8 using the connection pin 15 and the connection jig | tool 28 is demonstrated.
The engaging portion 28b of the connecting jig 28 is fitted into the mounting hole 13h of the leg main body 13, and the main body 28a is inserted into the fitting recess 16b of the reinforcing frame 16, and the first and third insertion holes 16c, 16d, The second insertion hole 28c is arranged at the same position. Then, the first to third shaft portions 15a to 15c of the connection pin 15 are inserted into the first insertion hole 16c, the third insertion hole 16d of the reinforcing frame 16, and the second insertion hole 28c of the connection jig 28, By rotating the operation knob 15e, the end surface 16a of the reinforcing frame 16 is pressed against the side surface of the leg main body 13 to connect the leg main body 13 and the reinforcing frame 16 in a horizontal T shape.

In addition, you may change the said embodiment as follows.
As shown in FIG. 11, a groove 15f is formed as a rotation operation part capable of engaging with a tool or a coin with respect to the flange part 15d, and a coin or a driver is engaged with the groove 15f to connect a connecting pin. 15 may be rotated. In this case, the operation knob 15e can be omitted.

  As shown in FIG. 12, engagement concave portions 15 g as rotation operation portions are formed at two locations on the outer surface of the flange portion 15 d of the connecting pin 15. On the other hand, a hole 31b into which the flange portion 15d can be inserted is formed in the disk portion 31a of the tool 31 for turning operation, and an engagement protrusion 32 to be inserted into the engagement recess 15g is formed on the bottom surface of the hole 31b. To do. Then, the connecting pin 15 may be rotated by rotating the tool 31 with the engaging protrusion 32 engaged with the engaging recess 15g.

  As shown in FIG. 13, the inner peripheral surface S2 of the second insertion hole 14c of the auxiliary leg portion 14 and the outer peripheral surface S1 of the second shaft portion 15b of the connecting pin 15 are changed from the first shaft portion 15a to the third shaft portion. You may form the inclination part 15h which becomes a large diameter dimension as it goes to the 15c side. In this case, when the leg main body 13 and the auxiliary leg 14 are connected by the connecting pin 15, the second shaft portion 15b of the connecting pin 15 is axially connected to the second insertion hole 14c of the auxiliary leg 14 by the inclined portion 15h. Since it becomes difficult to move in the direction, the connected state of the leg main body 13 and the auxiliary leg 14 by the connecting pin 15 can be stably maintained.

  As shown in FIG. 14, notches 15i and 15j may be provided on the outer peripheral surfaces of the first shaft portion 15a and the third shaft portion 15c of the connecting pin 15. Further, the shape of the outer peripheral surface S1 of the second shaft portion 15b may be an elliptical cross section, a fan shape, or an arm shape.

  As shown in FIG. 15, the third shaft portion 15c may be omitted. In this case, it is desirable to stabilize the connection state by increasing the dimension of the first shaft portion 15a in the central axis direction.

  As shown in FIG. 16, in place of the mounting holes 13h (see FIG. 8) of the leg main body 13, step-shaped mounting holes 13i and 13j are formed and replaced with the engaging portions 28b of the connecting jig 28. A stepped engagement portion 28d may be formed.

Although not shown, the fitting concave portion 13b of the leg main body 13 may be formed in a square tube shape, or the fitting convex portion 14b of the auxiliary leg portion 14 may be formed in a prismatic shape or a rectangular tube shape.
Although not shown, the operation knob 15e is omitted, and a square hole-like engagement hole is formed on the surface of the flange portion 15d as a rotation operation portion that engages a triangular wrench, square wrench, pentagon wrench, hexagon wrench, or the like. May be.

O You may materialize in the connection structure of two members of various products other than furniture, such as a chair and a table mentioned above, and the connection pin used for it.
Hereinafter, the technical idea grasped from the embodiment will be described.

(Technical Thought 1) A first member used in the member connecting structure according to any one of claims 1 to 6.
(Technical Thought 2) A second member used in the connecting structure of members according to any one of claims 1 to 6.

  (Definition) In this specification, the first shaft portion and the second shaft portion of the connecting pin include not only a cylindrical shaft portion but also an elliptical columnar, prismatic, or arm-shaped shaft portion. The fitting recess of the first member includes a U-shaped recess in addition to the fitting hole. Furthermore, the first insertion hole and the third insertion hole on the first member side and the second insertion hole on the second member side include a concave portion opened only on one side in addition to the penetrating hole.

The principal part expanded sectional view which shows one Embodiment which actualized this invention. FIG. 1 is a sectional view taken along line 1-1 of FIG. The perspective view which isolate | separated the leg part main body, the auxiliary leg part, and the connection pin. The front view which shows a chair. The right view which shows a chair. The principal part expanded sectional view which shows another embodiment of this invention. The perspective view which isolate | separates and shows a mounting frame, a leg part, and a connection jig | tool. The perspective view which isolate | separates and shows a leg part, a reinforcement frame, a connection pin, and a connection jig. The front view of a table. The right view of a table. The perspective view which shows another example of a connection pin. The perspective view which shows another example of a connection pin, and a tool. Sectional drawing of the use condition which shows another example of a connection pin. The perspective view which shows another example of a connection pin. Sectional drawing of the use condition which shows another example of a connection pin. Sectional drawing which shows another example of a leg part main body and a connection jig.

Explanation of symbols

  S1 ... outer peripheral surface, S2 ... inner peripheral surface, 13b, 16b, 23c ... fitting recess, 13c, 16c, 23d ... first insertion hole, 13d, 16d, 23e ... third insertion hole, 13f, 14b ... fitting protrusion Part, 13g, 14c, 28c ... second insertion hole, 15 ... connecting pin, 15e ... operation knob, 15a ... first shaft part, 15b ... second shaft part, 15c ... third shaft part, 15f ... groove, 15g ... Engaging recess, 15h ... inclined portion, 16a ... end face, 31 ... tool, 32 ... engaging projection.

Claims (7)

A fitting concave portion is formed in the first member, a fitting convex portion to be fitted into the fitting concave portion is provided in the second member, and the first member communicates with the fitting concave portion from an outer surface thereof. A first insertion hole formed through the first insertion hole, a second insertion hole formed so as to correspond to the first insertion hole with respect to the fitting convex portion, and a first shaft portion inserted into the first insertion hole; A second shaft portion that is eccentrically connected to one end of the first shaft portion and inserted into the second insertion hole; and provided at the other end of the first shaft portion, and the first and second shaft portions are A pivot pin is formed by a pivot operation unit that pivots, and the pivot pin is inserted into the first insertion hole and the second insertion hole, and the pivot manipulation part of the coupling pin is operated, The first member and the second member are connected by pressing against the inner peripheral surface of the second insertion hole while turning the eccentric outer peripheral surface of the second shaft portion. Coupling structure of that member. 3. The third shaft portion inserted into a third insertion hole formed on the same axis line as the first member at the tip of the second shaft portion so as to correspond to the first insertion hole. The connection structure of the member characterized by the above-mentioned. The member connection structure according to claim 1, wherein the rotation operation unit is an operation knob. The member connection structure according to claim 1, wherein the rotation operation portion is a tool or coin engaging groove formed on an end surface of the first shaft portion. 3. The rotating operation unit according to claim 1, wherein the rotation operation unit includes a plurality of engagement recesses formed on an end surface of the first shaft portion, and a plurality of engagement protrusions that are locked to the engagement recesses. A member connecting structure characterized by being rotated by a moving operation tool. In any one of Claims 1-5, the inclination part which becomes large in eccentricity is formed in the outer peripheral surface of the 2nd axial part of the said connection pin, as it leaves | separates from a 1st axial part, It is characterized by the above-mentioned. Connecting structure of members to be performed. The connection pin used for the connection structure of the member as described in any one of Claims 1-6.

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