WO2016199191A1 - Joining structure, joining method, and assembled furniture - Google Patents

Abstract

A joining method is equipped with: a step ST1 wherein one end of a bolt (30) is screwed into a hole (11) in a first component (10) and the other end is made to protrude from a hole (11); a step ST2 wherein the other end of the bolt (30) protruding from the hole (11) is screwed into a first inner diameter (41a) provided in one end of a connector (40); steps ST3, ST4 wherein three plate-spring-shaped engaging claw parts (43) provided separated from each other in the circumferential direction of a cylinder on the other end of the connector (40) are forcefully fitted from one end into an engagement hole (21) penetrating a second component (20), until the engaging claw parts reach the other end of the engagement hole (21); and a step ST6 wherein a tool T is used to forcefully screw the other end of the bolt (30) (screwed into the first inner diameter (41a)) into a second diameter (41b) continuous with the first inner diameter (41a) and formed toward the other end of the connector (40), thereby pushing out the outside of the second inner diameter (41b) in the diameter direction, and causing the other end of the engagement hole (21) and the engaging claw parts (43) to engage each other.

Description

Bonding structure, bonding method and assembling furniture

The present invention relates to a joining structure and joining method for joining two parts simply and firmly. Further, the present invention relates to an assembled furniture in which a plurality of parts are joined and assembled.

FIG. 7 is a cross-sectional view showing the structure of a conventional bonding structure. This conventional joint structure is disclosed in Patent Document 1.
In FIG. 7, 110 is a first part, 120 is a second part in which an engagement hole 121 is formed, 130 is a screw having a head 130a, and 140 is a connector.

In the connector 140, 141 is a substantially cylindrical mounting cylinder, 142 is a gap, 143 is a plurality of engaging claws formed on the outside of the mounting cylinder 141 across the gap 142, and 143a and 143b are engaging members. They are a taper part and an engagement step formed in the joint claw part 143.

[Correction based on rule 91 24.06.2015]
Next, a conventional bonding method will be described.
First, as shown in FIG. 7A, the screw 130 inserted into the mounting cylinder portion 141 is rotated about the central axis z2 as shown by the arrow m12, and the head 130a is fitted between the engagement claws 143. The screw 130 is screwed into the first part 110 to such a depth that it can not be inserted to temporarily fix the connector 140.

[Correction based on rule 91 24.06.2015]
Subsequently, as shown in FIG. 7B, the second part 120 is made to approach the first part 110 as shown by the arrow m13, and the joint tool 140 is forcibly fitted in the engagement hole 121. Then, the engagement hole 121 pushes the tapered portion 143a as shown by the arrow m14, and the engagement claw portion 143 elastically deforms toward the gap 142 side.

[Correction based on rule 91 24.06.2015]
Further, as shown in FIG. 7C, when the engagement hole 121 is fitted into the outer surface of the proximal end portion of the joint member 140, the engagement claw portion 143 elastically restores as shown by the arrow m15, and the engagement step portion 143 b engages with the engagement hole 121. Finally, screw 130 is again rotated around central axis z2 as shown by arrow m12 and screwed into first component 110, and the lower surface of head 130a contacts mounting cylinder 141 and head 130a engages When fitted between the joint claws 143, the joining of the first part 110 and the second part 120 is completed.

As described above, in the conventional bonding structure, desired bonding is realized by forcibly fitting the bonding tool 140 temporarily fixed to the first component 110 into the engagement hole 121 of the second component 120. There is. In particular, since the head 130a of the screw 130 is fitted between the engagement claws 143, the engagement claws 143 are prevented from being elastically deformed to the gap 142 side and the bonding being detached.

Utility model registration number 1749899 (Japanese Utility Model Application No. 63-013724)

Since the conventional joining structure is configured as described above, there is a problem that the joining force is weak because only the head of the screw fits in between the engaging claws.

The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a bonding structure and a bonding method capable of strengthening the bonding force.

Another object of the present invention is to provide an assembled furniture with an increased bonding strength.

A joint structure according to the present invention is a joint structure in which a first part and a second part having an engagement hole formed therein are joined using a substantially rod-like fastening body and a substantially cylindrical joining tool. The body is pierced at one end into the first part and the other end protrudes from the first part, and the connector is at one end with a first inner diameter into which the other end of the fastening body protruding from the first part is screwed A second inner diameter connected to the first inner diameter and formed on the other end side of the connector, wherein the other end of the fastening body screwed into the first inner diameter is forced to enter; Are a plurality of engaging claws each having a second inner diameter that can be radially expanded and provided at the other end separately in the circumferential direction of the cylinder, and forced from one end of the engaging hole Of the engagement hole when the other end of the fastening body is forced into the second inner diameter. It is obtained so as to comprise an engaging claw portion for engaging an end.

By doing so, the effect of strengthening the bonding strength can be obtained.

It is a perspective view which shows the external appearance of the volt | bolt used for the junction structure by Embodiment 1 of this invention, and a junction. It is a figure which shows the structure of the junction tool shown in FIG. 1 (the 1). It is a figure which shows the structure of the junction tool shown in FIG. 1 (the 2). It is a figure which shows the structure of the junction tool shown in FIG. 1 (the 3). It is a flowchart which shows the procedure of the joining method by Embodiment 1 of this invention. It is sectional drawing which deform | transforms and shows the mode of the operation | work by the joining method of FIG. It is sectional drawing which deform | transforms and shows the mode of the operation | work by the joining method of FIG. 3 (the 1). It is sectional drawing which deform | transforms and shows the mode of the operation | work by the joining method of FIG. 3 (the 2). FIG. 7 is a cross-sectional view showing a state of work according to the bonding method of FIG. 3 (part 3). It is sectional drawing which deform | transforms and shows the mode of the operation | work by the joining method of FIG. 3 (the 4). It is sectional drawing which deform | transforms and shows a part of the mode of the operation | work by the joining method partially different from FIG. 3 (the 1). It is sectional drawing which deform | transforms and shows a part of the mode of the operation | work by the joining method partially different from FIG. 3 (the 2). It is sectional drawing which shows the structure of the conventional joining structure.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding components are denoted by the same or corresponding reference numerals.

Embodiment 1
<Configuration>
FIG. 1 is a perspective view showing the appearance of a bolt and a joint used in a joint structure according to Embodiment 1 of the present invention. 2 is a view showing the structure of the joint shown in FIG. 1, and FIG. 2 (a) is a left side view, FIG. 2 (b) is a front view, FIG. 2 (c) is a right side view, 2 (d) is a rear view, FIG. 2 (e) is a plan view, FIG. 2 (f) is a bottom view, FIG. 2 (g) is a sectional view taken along the line AA, and FIGS. (J) is each sectional drawing of a BB line, a CC line, and a DD line. When the BB line is rotated by 120 ° around the central axis of the connector, it becomes a CC line, and when it rotates by 240 °, it becomes a DD line.

In FIGS. 1 and 2, 30 is a metal rod-like bolt (fastening body), and 40 is a resin-made cylindrical connector. The bonding tool 40 is an article for simply and firmly bonding a plurality of parts constituting an assembled furniture or the like together with the bolt 30.

Further, in the bonding tool 40 of FIGS. 1 and 2, 41 is a substantially cylindrical attachment cylinder provided on one end side of the bonding tool 40, 41a and 41b are the first inner diameter and the second inner diameter, respectively, and 43 is the bonding tool Three leaf spring-like engaging claws provided separately on the other end side of the cylinder 40 in the circumferential direction of the cylinder; taper portions 43a and 43b respectively formed on the other end side of the respective engaging claws 43; The engagement step portion 43 v is a V groove formed on the inner peripheral side of the engagement claw portion 43.

Here, the first inner diameter 41 a is formed by forming a screw thread for screwing in the other end side of the bolt 30 by the length α from one end of the joint tool 40 on the inner periphery. As can be seen by comparing FIGS. 2 (h) to 2 (j), the other part of the connector 40 has the same shape except that the helical thread portion of the first inner diameter 41a looks different.

On the other hand, the second inner diameter 41b is continuous with the first inner diameter 41a and is only the length β to the other end side of the joining tool 40, that is, the first inner diameter as can be seen from FIGS. 2 (g) to 2 (j). It is provided from the boundary with 41 a to one end side of the engagement claw portion 43 (a base portion connected to the mounting cylinder portion 41 of the engagement claw portion 43). The second inner diameter 41b is substantially the same as the first inner diameter 41a in terms of the size of the diameter, but no thread is formed on the inner periphery.

<Joining>
Next, the bonding method will be described.
FIG. 3 is a flow chart showing the procedure of the bonding method according to the first embodiment of the present invention, and FIGS. 4 and 5 are cross-sectional views showing the operation of the bonding method of FIG.

[Correction based on rule 91 24.06.2015]
First, as shown in FIG. 4A, the bolt 30 is moved as indicated by the arrow m2 while being rotated around the central axis z1 as indicated by the arrow m1, and the hole 11 formed in the rectangular solid first part 10 is formed. Pierce one end of the bolt 30 (step ST1). Since the hole 11 is formed shorter than the length of the bolt 30, as shown in FIG. 4 (b), when the bolt 30 pierces the hole 11, the other end of the bolt 30 protrudes from the hole 11 of the first component 10. It will be in a state of

[Correction based on rule 91 24.06.2015]
Subsequently, while rotating the bonding tool 40 of FIG. 4B around the central axis z1 as shown by the arrow m3, it is moved as shown by the arrow m4, and a bolt is formed on the first inner diameter 41a formed at one end of the bonding tool 40. The other end side of 30 is screwed in, and the joining tool 40 is temporarily fixed (step ST2). As described above, unlike the first inner diameter 41a, no thread is formed on the second inner diameter 41b. Therefore, as shown in FIG. 4C, the other end of the bolt 30 has a length α When it is screwed into the first inner diameter 41a of the first one, it once stays at the boundary between the first inner diameter 41a and the second inner diameter 41b.

[Correction based on rule 91 24.06.2015]
Subsequently, as shown in FIG. 5A, the rectangular second part 20 is moved as shown by the arrow m5 to approach the first part 10, and the bolt 30 of the first part 10 is temporarily attached. The connector 40 thus stopped is forcibly fitted into the engagement hole 21 formed in the second part 20 from the tapered portion 21a on one end side (step ST3). The diameter x2 of the engagement step 43b is larger than the diameter x1 of the engagement cylindrical portion 41 and the engagement hole 21. Therefore, as shown in FIG. The engagement claws 43 are pushed as shown by the arrow m6, and elastically deform inward.

[Correction based on rule 91 24.06.2015]
Then, when the second step 20 is further moved as shown by the arrow m5 and the engagement step 43b reaches the counterbore 21b of the engagement hole 21, the counterbore 21b has a diameter x2, so this time, as shown in FIG. As shown in c), the engagement claw 43 elastically restores outward as shown by the arrow m7 (step ST4).

[Correction based on rule 91 24.06.2015]
The second part 20 is further advanced by its own weight as shown by the arrow m5 and stops in contact with the first part 10 as shown in FIG. 5D, from the counterbore 21b of the engagement hole 21. The other end side of the engagement claw portion 43 protrudes (step ST5).

[Correction based on rule 91 24.06.2015]
Here, as shown in FIG. 5 (e), insert a tool T to be engaged with the V groove 43v (not shown in FIG. 5 (e), see FIG. 2) of the engagement claw 43 as shown by arrow m8. As shown in FIG. 5 (f), the connector 40 is pushed toward the first part 10 while being rotated about the central axis z1 as indicated by the arrow m9. Then, the other end of the metal bolt 30 screwed into the first inner diameter 41a is forcibly screwed in while the second inner diameter 41b made of resin softer than metal is screwed. The connector 40 is fitted into the engagement hole 21 as indicated by the arrow m11 while pushing out the outside of the second inner diameter 41b in the radial direction as indicated by the arrow m10 (step ST6).

[Correction based on rule 91 24.06.2015]
Thus, when the joining tool 40 is sufficiently fitted into the engagement hole 21 and the engagement step 43b of the engagement claw 43 engages with the counterbore 21b, the tool T is pulled out from the V groove 43v, as shown in FIG. As shown in, the joining operation is completed (step ST7). As can be seen from FIG. 5 (g), the other end of the bolt 30 pushes the outer side of the second inner diameter 41b radially as shown by the arrow m10.

As described above, since the first inner diameter 41a and the second inner diameter 41b having substantially the same diameter are provided from the boundary with the first inner diameter 41a to one end side of the engagement claw portion 43, the other of the bolt 30 When the outer side of the second inner diameter 41b is expanded in the radial direction due to the intrusion on the end side, the frictional force between the engagement hole 21 and the joining tool 40 becomes large, and the engagement claw portion 43 and the counterbore portion 21b Engagement will be strengthened. Therefore, unlike the joint structure of FIG. 7 in which only the head 130 a of the screw 130 is fitted between the engagement claws 143, the joint force can be strengthened.

In addition, by using the joint structure according to the first embodiment for the assembled furniture, it is possible to provide an assembled furniture having a strengthened joining force.

<Summary>
As described above, according to the first embodiment, the step ST1 of sticking one end of the bolt 30 into the hole 11 of the first component 10 and making the other end protrude from the hole 11; Step ST2 of screwing the other end of the bolt 30 projected from the hole 11 into the inner diameter 41a of 1, and plate spring-like three separately provided on the other end side of the joining device 40 in the circumferential direction of the cylinder. The engaging claw portion 43 is forcibly fitted and elastically deformed from one end of the engaging hole 21 formed in the second part 20, and is allowed to reach the other end of the engaging hole 21 for elastic restoration, The other end of the bolt 30 screwed into the first inner diameter 41a is forcibly twisted by a tool T into the ST4 and the second inner diameter 41b formed on the other end side of the joint 40 connected to the first inner diameter 41a. Insert the outer diameter of the second inner diameter 41b Since the step ST6 of expanding is provided, the frictional force between the engagement hole 21 and the joining tool 40 is increased, and the engagement between the engagement claw portion 43 and the counterbore portion 21b is also strengthened, and the joining is performed. The effect of strengthening the power is obtained.

Further, according to the first embodiment, for the second component 20, since the tapered portion 21a that tapers from one end of the engagement hole 21 to the other end is provided at one end of the engagement hole 21, step ST3 , And ST4, an effect is obtained that the work of fitting the bonding tool 40 into the engagement hole 21 is facilitated by the tapered portion 21a.

Furthermore, according to the first embodiment, for the second part 20, the counterbore 21b for embedding the engagement claw 43 in the second part 20 is provided at the other end of the engagement hole 21, and the step is performed. In ST6, the engagement claw 43 is engaged with the counterbore 21b at the other end of the engagement hole 21. Therefore, the engagement claw 43 is embedded in the second component 20 and does not protrude, and the joint portion As a result, the effect of improving safety can be obtained.

Furthermore, according to the first embodiment, at least a part of the structure of the assembled furniture is provided with the joint structure for joining the first part 10 and the second part 20 by the bolt 30 and the joint 40. Therefore, the effect of being able to provide the assembly furniture which reinforced joint power is acquired.

<Modification>
In the description of FIGS. 3 to 5, the second part 20 is brought close to the upper part and joined to the first part 10 disposed in the lower part, but the first embodiment is limited to this. It is also possible to arrange the first component 10 and the second component 20 left and right and join them together. However, in this case, although it is not an essential difference, the procedure of the bonding method of FIG. 3 is slightly different.

That is, as shown in FIG. 6A, when the first part 10 with the joining tool 40 temporarily attached is placed on the left side and the second part 20 is placed on the right side, the steps in FIG. When the operation of ST1 to ST4 is performed in the same manner as in the case of FIG. 5 and the engagement claw portion 43 is in an elastically restored state, the second part 20 falls to the position of the first part 10 by its own weight and contacts this. Since it does not happen, the process of step ST5 is not performed, and the process proceeds to step ST6 (FIG. 6 (b)).

Then, as shown in FIG. 6C, when the other end side of the bolt 30 is screwed into the second inner diameter 41b using the tool T, the second part 20 and the connector 40 Approach the part 10. Even in this case, it is possible to perform the same bonding as in the case of FIG.

Further, although the number of engaging claws 43 formed on the other end side of the bonding tool 40 is three in the description of FIGS. 3 to 5, the first embodiment is not limited to this. As long as at least two joint claws 43 are provided, it can be implemented.

Furthermore, although a resin is appropriate as a material of the bonding tool 40, the first embodiment is not limited to this, and a metal can also be used. The material of the first and second parts 10 and 20 may be made of metal such as iron or aluminum in addition to wood or resin.

Furthermore, the operation at the time of forcibly entering the other end side of the bolt 30 into the second inner diameter 41 b is the operation other than the operation of forcibly screwing the other end side of the bolt 30 into the second inner diameter 41 b It may be the operation of The point is that the other end of the bolt 30 can be forcibly made to approach the second inner diameter 41b, and the state in which the outside of the second inner diameter 41b can be pushed out in the radial direction can be maintained. The tool T is not an essential component, and may be another means other than the tool T as long as the other end of the bolt 30 can be forcibly entered into the second inner diameter 41 b.

Furthermore, the length α of the first inner diameter 41 a and the length β of the second inner diameter 41 b can be changed as appropriate. For example, in FIG. 2 (g), the bonding force can be further strengthened by extending the length β of the second inner diameter 41b to the other end side longer.

Furthermore, when the first embodiment is applied to assembly furniture, the user may be allowed to perform the operations (steps ST1 and ST2) shown in FIGS. 4 (a) to 4 (c). It may be performed on the production line before factory shipment.

[Correction based on rule 91 24.06.2015]
DESCRIPTION OF SYMBOLS 10 1st part, 11 holes, 20 2nd parts, 21 engagement hole, 21a taper part, 21b counterbore part, 30 bolt (fastening body), 40 joining tool, 41a 1st inside diameter, 41b 2nd Inner diameter, 43 engagement claws, 43a tapered portions, 43b engagement steps, 43v V grooves, m1 to m11 arrows, T tools, x1, x2 diameter, z1 central axis.

Claims (7)

In a joining structure in which a first part and a second part having an engagement hole formed therein are joined using a substantially rod-like fastening body and a substantially cylindrical joining tool,
The above-mentioned fastening body is
One end pierces the first part and the other end protrudes from the first part,
The above connector is
At one end,
A first inner diameter into which the other end of the fastening body protruding from the first component is screwed, and a second inner diameter formed on the other end side of the connector in series with the first inner diameter An outer diameter of the second inner diameter that is radially expanded when the other end of the fastening body screwed into the first inner diameter forcibly enters;
At the other end
A plurality of engaging claws respectively provided separately in the circumferential direction of the cylinder, and are forcibly fitted from one end of the engaging hole to reach the other end of the engaging hole, and the fastening is performed. A joint structure comprising: the engagement claw portion engaged with the other end of the engagement hole when the other end of the body forcibly enters the second inner diameter. The joint structure according to claim 1, wherein the second part includes a tapered portion at one end of the engagement hole, which tapers from one end of the engagement hole toward the other end. The second part has a counterbore at the other end of the engagement hole for embedding the engagement claw into the second part,
The joint structure according to claim 1, wherein the engagement claw portion engages with the counterbore at the other end of the engagement hole. In a joining method for joining a first part and a second part having an engagement hole, using a substantially rod-like fastening body and a substantially cylindrical joining tool,
A first step of sticking one end of the fastening body into the first part and projecting the other end from the first part;
A second step of screwing the other end of the fastening body protruded from the first part into the first inner diameter provided at one end of the connector;
A plurality of engaging claws separately provided in the circumferential direction of the cylinder at the other end of the connector are forcibly fitted from one end of the engaging hole to reach the other end of the engaging hole Step and
The other end of the fastening body screwed into the first inner diameter is forcibly made to approach the second inner diameter formed in a line with the first inner diameter and formed on the other end side of the connector, and the second And a fourth step of causing the other end of the engagement hole to be engaged with the engagement claw portion while radially expanding the outside of the inner diameter of the second joint. 5. The bonding method according to claim 4, wherein the second part is provided with a tapered portion which is tapered from one end of the engagement hole toward the other end of the engagement hole. For the second part, a counterbore for embedding the engagement claws in the second part is provided at the other end of the engagement hole,
The joining method according to claim 4, wherein in the fourth step, the engagement claw portion is engaged with the counterbore at the other end of the engagement hole. An assembly furniture comprising at least a part of the joint structure according to any one of claims 1 to 3.

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