JP6013617B1 - Joining structure, joining method and assembly furniture - Google Patents

Abstract

A step ST1 in which one end of the bolt (30) is screwed into the hole (11) of the first component (10) and the other end protrudes from the hole (11), and a first provided at one end of the connector (40). Step ST2 for screwing the other end of the bolt (30) protruding from the hole (11) into the inner diameter (41a), and a plate provided separately at the other end of the connector (40) in the circumferential direction of the cylinder The spring-like three engagement claws (43) are forcibly fitted from one end of the engagement hole (21) formed in the second component (20) to the other end of the engagement hole (21). The first inner diameter (41a) was screwed into the steps ST3 and ST4 to be reached and the second inner diameter (41b) formed on the other end side of the connector (40) connected to the first inner diameter (41a). The other end of the bolt (30) is forcibly screwed with the tool T, and the outer side of the second inner diameter (41b) is pushed in the radial direction. It widens, and a step ST6 engaging the other end engaging claw portion of the engagement hole (21) and (43).

Description

  The present invention relates to a bonding structure and a bonding method for simply and firmly bonding two components. Moreover, this invention relates to the assembly furniture which joins and assembles several components, respectively.

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

  In the connector 140, 141 is a substantially cylindrical mounting tube portion, 142 is a gap, 143 is a plurality of engaging claw portions formed outside the mounting tube portion 141 with the gap 142 interposed therebetween, and 143a and 143b are engagement members. They are a taper part and an engagement step part formed in the joint claw part 143.

Next, a conventional joining method will be described.
First, as shown in FIG. 7A, the screw 130 inserted into the mounting cylinder 141 is rotated around the central axis z2 as indicated by an arrow m12, and the head 130a is fitted between the engaging claws 143. The screw 130 is screwed into the first component 110 to a depth not to be inserted, and the connector 140 is temporarily fixed.

  Subsequently, as illustrated in FIG. 7B, the second component 120 is brought close to the first component 110 as indicated by an arrow m <b> 13, and the connector 140 is forcibly fitted into the engagement hole 121. Then, the engagement hole 121 pushes the taper portion 143a as indicated by an arrow m14, and the engagement claw portion 143 is elastically deformed toward the gap 142 side.

  Further, as shown in FIG. 7C, when the engagement hole 121 is fitted into the outer surface of the proximal end portion of the connector 140, the engagement claw portion 143 is elastically restored as indicated by an arrow m15, and the engagement step portion 143 b engages with the engagement hole 121. Finally, the screw 130 is rotated again around the central axis z2 as indicated by the arrow m12 and screwed into the first component 110. The lower surface of the head portion 130a contacts the mounting tube portion 141, and the head portion 130a is engaged with each member. When fitted between the mating claws 143, the joining of the first component 110 and the second component 120 is completed.

  As described above, in the conventional joining structure, a desired joining is realized by forcibly fitting the joining tool 140 temporarily fixed to the first part 110 into the engaging hole 121 of the second part 120. Yes. Particularly, since the head portion 130a of the screw 130 is fitted between the engaging claw portions 143, the engagement claw portion 143 is prevented from being elastically deformed toward the gap 142 and being disconnected.

Utility model registration No. 1749899 (Act No. 63-013724)

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

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

  Moreover, this invention aims at providing the assembly furniture which strengthened joining power.

  A joining structure according to the present invention is a joining structure in which a first part and a second part having an engagement hole are joined using a substantially rod-like fastening body and a substantially cylindrical joining tool. One end of the body pierces the first part and the other end protrudes from the first part. The joint has a first inner diameter into which the other end of the fastening body protruding from the first part is screwed. When the other end of the fastening body screwed into the first inner diameter is forcibly entered, the second inner diameter is formed on the other end side of the connector, and is connected to the first inner diameter. A plurality of engaging claws provided separately at the other end in the circumferential direction of the cylinder, and forced from one end of the engaging hole. When the other end of the fastening body forcibly enters the second inner diameter, the other end of the engagement hole is inserted. It is obtained so as to comprise an engaging claw portion for engaging with.

  By doing in this way, the effect that a joining force can be strengthened is acquired.

It is a perspective view which shows the external appearance of the volt | bolt used for the joining structure by Embodiment 1 of this invention, and a fixture. It is a figure which shows the structure of the connector shown in FIG. 1 (the 1). It is a figure which shows the structure of the connector shown in FIG. 1 (the 2). It is a figure which shows the structure of the coupling 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. FIG. 4 is a cross-sectional view (No. 1) showing a deformed state of work by the joining method of FIG. 3. FIG. 4 is a cross-sectional view showing a deformed state of the operation by the joining method of FIG. 3 (part 2). FIG. 4 is a cross-sectional view showing a deformed state of work by the joining method of FIG. 3 (No. 3). FIG. 4 is a sectional view (No. 4) showing a deformed state of work by the joining method of FIG. 3; FIG. 4 is a cross-sectional view showing a part of the work by a joining method partially different from FIG. 3 (No. 1). FIG. 4 is a cross-sectional view showing a part of the working state by a joining method partially different from FIG. 3 (No. 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 constituent elements are denoted by the same or corresponding reference numerals.

Embodiment 1 FIG.
<Configuration>
FIG. 1 is a perspective view showing the external appearance of a bolt and a joint used in a joint structure according to Embodiment 1 of the present invention. 2 is a diagram showing the configuration of the connector shown in FIG. 1. FIG. 2 (a) is a left side view, FIG. 2 (b) is a front view, and 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 cross-sectional view taken along line AA, and FIGS. 2 (h), (i), (J) is each sectional drawing of a BB line, CC line, and DD line. When the B-B line is rotated 120 ° around the central axis of the connector, it becomes a CC line, and when it is rotated 240 °, it becomes a DD line.

  In FIGS. 1 and 2, 30 is a metal substantially rod-like bolt (fastened body), and 40 is a resin-made substantially cylindrical joint. The joint tool 40 is an article for joining a plurality of parts constituting assembly furniture and the like together with the bolts 30 easily and firmly.

  In addition, in the connector 40 shown in FIGS. 1 and 2, reference numeral 41 denotes a substantially cylindrical mounting tube provided on one end of the connector 40, 41a and 41b denote a first inner diameter and a second inner diameter, respectively, and 43 denotes a connector. Three leaf spring-like engagement claws, 43a and 43b, which are separately provided in the circumferential direction of the cylinder on the other end side of the cylinder 40, are tapered portions formed on the other end side of the respective engagement claws 43, respectively. Engagement step portions 43 v are V grooves formed on the inner peripheral side of the engagement claw portion 43.

  Here, the first inner diameter 41a is formed by forming a screw thread on the inner circumference for screwing the other end of the bolt 30 by a length α from one end of the connector 40. As can be seen by comparing FIGS. 2 (h) to (j), the other parts of the connector 40 have the same shape except that the spiral thread portion of the first inner diameter 41a appears different.

  On the other hand, as can be seen from FIGS. 2 (g) to 2 (j), the second inner diameter 41b is connected to the first inner diameter 41a by the length β, that is, the first inner diameter. It is provided from the boundary with 41a to one end side of the engaging claw part 43 (the fundamental part connected to the mounting cylinder part 41 of the engaging claw part 43). The second inner diameter 41b is substantially the same in diameter as the first inner diameter 41a, but does not have a thread on the inner periphery.

<Joint>
Next, the joining method will be described.
FIG. 3 is a flowchart showing the procedure of the joining method according to Embodiment 1 of the present invention, and FIGS. 4 and 5 are sectional views showing the state of work by the joining method of FIG. 3 in a deformed manner.

  First, as shown in FIG. 4A, the bolt 30 is moved around the central axis z1 as indicated by the arrow m1 and moved as indicated by the arrow m2, and the hole 11 formed in the first rectangular parallelepiped part 10 is formed. The one end side of the bolt 30 is pierced in (step ST1). Since the hole 11 is formed shorter than the length of the bolt 30, as shown in FIG. 4B, when the bolt 30 is inserted into the hole 11, the other end side of the bolt 30 protrudes from the hole 11 of the first component 10. It will be in the state.

  Subsequently, the connector 40 of FIG. 4B is moved as indicated by an arrow m4 while rotating around the central axis z1 as indicated by an arrow m3, and a bolt is attached to a first inner diameter 41a formed on one end side of the connector 40. The other end side of 30 is screwed in, and the connector 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, it temporarily stops at the boundary between the first inner diameter 41a and the second inner diameter 41b.

  Subsequently, as shown in FIG. 5A, the rectangular parallelepiped second part 20 is moved as indicated by an arrow m5 to approach the first part 10, and the bolt 30 of the first part 10 is temporarily attached. The stopped connector 40 is forcibly fitted into the engagement hole 21 formed in the second component 20 from the tapered portion 21a on one end side (step ST3). Since the diameter x2 of the engagement step portion 43b is larger than the diameter x1 of the engagement cylinder portion 41 and the engagement hole 21, the leaf spring shape is formed by the inner periphery of the engagement hole 21 as shown in FIG. The engaging claw portion 43 is pushed as indicated by an arrow m6 and elastically deformed inward.

  Then, when the second component 20 is further moved as indicated by an arrow m5 and the engagement step portion 43b reaches the counterbore portion 21b of the engagement hole 21, the counterbore portion 21b has a diameter x2, so this time FIG. As shown in c), the engaging claw 43 is elastically restored outward as indicated by an arrow m7 (step ST4).

  The second component 20 further advances as shown by the arrow m5 due to its own weight, and stops in contact with the first component 10 as shown in FIG. 5 (d), from the counterbore portion 21b of the engagement hole 21. The other end side of the engaging claw portion 43 protrudes (step ST5).

  Here, as shown in FIG. 5 (e), the tool T to be fitted with the V groove 43v (not shown in FIG. 5 (e); see FIG. 2) of the engaging claw portion 43 is inserted as indicated by an arrow m8. As shown in FIG. 5 (f), the connector 40 is pushed toward the first component 10 while rotating around the central axis z1 as indicated by an arrow m9. Then, the other end of the metal bolt 30 screwed into the first inner diameter 41a is forcibly screwed into the second inner diameter 41b made of resin softer than the metal while cutting the screw. Then, the outer side of the second inner diameter 41b is expanded in the radial direction as indicated by the arrow m10, and the connector 40 is fitted into the engagement hole 21 as indicated by the arrow m11 (step ST6).

  Thus, when the connector 40 is fully fitted into the engagement hole 21 and the engagement step portion 43b of the engagement claw portion 43 is engaged with the counterbore portion 21b, the tool T is extracted from the V groove 43v, and FIG. As shown in (3), the joining operation is completed (step ST7). As can be seen from FIG. 5G, the other end side of the bolt 30 is in a state of pushing the outside of the second inner diameter 41b in the radial direction as indicated by an arrow m10.

  As described above, the second inner diameter 41b, which is substantially the same diameter as the first inner diameter 41a, is provided from the boundary with the first inner diameter 41a to one end side of the engaging claw portion 43. When the outer side of the second inner diameter 41b is pushed and expanded in the radial direction due to the end side intrusion, the frictional force between the engagement hole 21 and the connector 40 increases, and the engagement claw portion 43 and the counterbore portion 21b The engagement is also strengthened. Therefore, unlike the joining structure of FIG. 7 in which the head portion 130a of the screw 130 is merely fitted between the engaging claws 143, the joining force can be strengthened.

  Further, by using the joint structure according to the first embodiment for the assembly furniture, it is possible to provide the assembly furniture with enhanced bonding force.

<Summary>
As described above, according to the first embodiment, step ST1 in which one end of the bolt 30 is pierced into the hole 11 of the first component 10 and the other end is protruded from the hole 11, and the first provided at one end of the connector 40 is provided. Step ST2 for screwing the other end of the bolt 30 projecting from the hole 11 into the inner diameter 41a of the first plate, and three leaf springs provided separately on the other end side of the connector 40 in the circumferential direction of the cylinder. Step ST3 in which the engaging claw 43 is forcibly fitted from one end of the engaging hole 21 formed in the second component 20 to be elastically deformed, and is also elastically restored by reaching the other end of the engaging hole 21. The tool T is used to forcibly screw the other end of the bolt 30 screwed into the first inner diameter 41a into the second inner diameter 41b formed on the other end side of the connector 40 and connected to the first inner diameter 41a. So that the outside of the second inner diameter 41b extends in the radial direction. Since the step ST6 is further provided, the frictional force between the engagement hole 21 and the connector 40 is increased, and the engagement between the engagement claw portion 43 and the counterbore portion 21b is also strengthened. The effect that power can be strengthened is obtained.

  Further, according to the first embodiment, the second component 20 is provided with the tapered portion 21a tapering from one end of the engagement hole 21 to the other end at one end of the engagement hole 21, so that step ST3 In ST4, the effect that the fitting operation of the connector 40 into the engagement hole 21 is facilitated by the tapered portion 21a is obtained.

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

  Furthermore, according to the first embodiment, at least a part of the structure of the assembled furniture is provided with a joining structure for joining the first part 10 and the second part 20 by the bolt 30 and the joining tool 40. Therefore, the effect that the assembly furniture which strengthened joining power can be provided is acquired.

<Modification>
In the description of FIGS. 3 to 5, the second component 20 is joined to the first component 10 arranged in the lower portion from the upper portion, but the first embodiment is limited to this. Alternatively, the first component 10 and the second component 20 can be arranged on the left and right sides and joined. However, in this case, although not an essential difference, the procedure of the joining method in FIG. 3 is slightly different.

  That is, as shown in FIG. 6 (a), when the first component 10 temporarily fixed with the connector 40 is arranged on the left side and the second component 20 is arranged on the right side and both are joined, the steps shown in FIG. When the operations of ST1 to ST4 are performed in the same manner as in FIG. 5 and the engagement claw portion 43 is elastically restored, the second component 20 is lowered to the position of the first component 10 by its own weight and comes into contact therewith. Since nothing happens, the process moves to step ST6 without performing the work of step ST5 (FIG. 6B).

  Then, as shown in FIG. 6C, when the other end side of the bolt 30 is screwed into the second inner diameter 41 b using the tool T, the second component 20 together with the connector 40 is the first. The part 10 is approached. Even in this way, it is possible to perform the same joining as in FIG.

  In the description of FIGS. 3 to 5, the number of the engagement claw portions 43 formed on the other end side of the connector 40 is three. However, the first embodiment is not limited to this, and If the number of the claw portions 43 is at least two, it can be implemented.

  Further, a resin is suitable as the material of the connector 40, but the first embodiment is not limited to this, and can be implemented with metal. The first and second parts 10 and 20 may be made of metal such as iron or aluminum in addition to wooden or resin.

  Further, the operation when the other end side of the bolt 30 is forcibly entered into the second inner diameter 41b is other than the operation of forcing the other end side of the bolt 30 into the second inner diameter 41b while cutting the screw forcibly. It does not matter even if it is the operation. In short, it is only necessary to force the other end of the bolt 30 to enter the second inner diameter 41b and maintain the state in which the outer side of the second inner diameter 41b is expanded in the radial direction. 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 41b.

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

  Furthermore, when this Embodiment 1 is applied to an assembly furniture, you may make it make a user perform about the operation | work (step ST1, ST2) shown to Fig.4 (a)-(c), It may be performed on the production line before shipment from the factory.

  DESCRIPTION OF SYMBOLS 10 1st part, 11 hole, 20 2nd part, 21 engagement hole, 21a taper part, 21b counterbore part, 30 bolt (fastening body), 40 connector, 41a 1st internal diameter, 41b 2nd Inner diameter, 43 engagement claw part, 43a taper part, 43b engagement step part, 43v V groove, m1-m11 arrow, T tool, x1, x2 diameter, z1 central axis.

Claims (7)

In a joining structure in which the first part and the second part having the engagement hole are joined using a substantially rod-shaped fastening body and a substantially cylindrical joining tool,
The fastening body is
One end sticks into the first part and the other end protrudes from the first part,
The connector is
On one end side
A first inner diameter into which the other end of the fastening body projecting from the first component is screwed, and a thread formed on the inner circumference connected to the first inner diameter and formed on the other end side of the connector. A second inner diameter that is not formed, and when the other end of the fastening body screwed into the first inner diameter is forcibly entered, the second inner diameter is pushed outward in the radial direction. With a substantially cylindrical mounting cylinder with
On the other side ,
A plurality of engaging claws provided separately in the circumferential direction of the cylinder, forcibly fitted from one end of the engaging hole to reach the other end of the engaging hole, and the fastening When the other end of the body forcibly enters the second inner diameter, the engagement claw portion engages with the other end of the engagement hole,
When the engagement claw reaches the other end of the engagement hole, the connector is rotated around its central axis, and the other end of the fastening body screwed into the first inner diameter is connected to the second end. A joining structure, wherein the fastening body is forcibly entered into an inner diameter while cutting a screw .   2. The joining structure according to claim 1, wherein the second component includes a tapered portion at one end of the engagement hole that tapers toward the other end from the one end of the engagement hole. The second part has a counterbore part for embedding the engaging claw part in the second part at the other end of the engaging hole,
The joining structure according to claim 1, wherein the engaging claw is engaged with the counterbore at the other end of the engaging hole. In the joining method of joining the first part and the second part having an engagement hole by using a substantially rod-like fastening body and a substantially cylindrical joining tool,
A first step of piercing one end of the fastening body into the first component and projecting the other end from the first component;
A second step of screwing the other end of the fastening body protruding from the first component into a first inner diameter provided in a substantially cylindrical mounting tube portion on one end side of the connector;
A plurality of engaging claws provided separately in the circumferential direction of the cylinder on the other end side of the connector are forcibly fitted from one end of the engaging hole to reach the other end of the engaging hole. 3 steps,
The connector is rotated about its central axis, and a second inner diameter formed on the other end side of the connector is connected to the first inner diameter in the substantially cylindrical mounting tube portion, and the thread is inside. The other end of the fastening body screwed into the first inner diameter is forced to enter the second inner diameter not formed on the circumference while the fastening body cuts the screw into the second inner diameter. A joining method comprising: a fourth step of expanding the outside of the second inner diameter in the radial direction and engaging the other end of the engagement hole with the engagement claw portion.   5. The joining method according to claim 4, wherein the second part is provided with a tapered portion that tapers toward one end of the engagement hole toward the other end. For the second part, a counterbore part for embedding the engaging claw part in the second part is provided at the other end of the engaging hole,
5. The joining method according to claim 4, wherein in the fourth step, the engaging claw is engaged with the counterbore at the other end of the engaging hole.   An assembled furniture comprising at least a part of the joint structure according to any one of claims 1 to 3.

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