Laminated resin component fitting joint and method for manufacturing the same

Abstract

To provide a conjugate of laminate molded resin part that is resistant to bending loads and can be made large.SOLUTION: A conjugate of laminate molded resin part 10 is a rectangular prism with square end faces and is composed of a laminate molded resin part 11 having an inverted cone-shaped joint surface 11a, a laminate molded resin part 12 having a cone-shaped joint surface 12a, and an adhesive layer 13 that fits and joins the inverted cone-shaped joint surface 11a of the laminate molded resin part 11 and the cone-shaped joint surface 12a of the laminate molded resin part 12. A longitudinal direction X perpendicular to a laminate direction Y of the laminate molded resin part 11 and the longitudinal direction X perpendicular to the laminate direction Y of the laminate molded resin part 12 are made continuous with each other.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a laminated molded resin component fitting joint and the manufacturing method thereof .

Background Art

[0002] As a camera driving device for observing molten nuclear fuel in a nuclear power plant after a severe accident, an articulated manipulator (robot arm) is required.

[0003] For example, in the first conventional articulated manipulator shown in FIG. 9, a large number of links 101-1, 101-2,... (only three are shown) are led from a base 103 and serially connected by horizontal joints 102-1, 102-2,... Pulleys 104-1, 104-2,... are fixedly axially attached to each of the joints 102-1, 102-2,.... Each of the links 101-1, 101-2,... is driven by driving actuators (motors) (not shown) provided in the base 103 and each of the joints 102-1, 102-2,... by wires 105-1, 105-2,... wound around the pulleys 104-1, 104-2,... (see Fig. 1(a) of Non-Patent Document 1).

[0004] Furthermore, in the articulated manipulator shown in Figure 10, numerous links 201-1, 201-2, ... (only three are shown) are led from the base 203 and connected in series by horizontal joints 202-1, 202-2, .... A pulley (not shown) is fixedly pivoted to each joint 202-1, 202-2, .... Each link 201-1, 201-2, ... is driven by an actuator (motor) (not shown) provided within the joints 202-1, 202-2, ... via a wire (not shown) wound around these pulleys. To compensate for the weight of the numerous links 201-1, 201-2, ..., weight-compensating pulleys 204-1, 204-2, ... are slidably pivoted to each joint 202-1, 202-2, ..., a single weight-compensating wire 205 is fixed to the end link and wrapped around each weight-compensating pulley 204-1, 204-2, ... in one rotation, and the weight-compensating torque is offset by pulling the end of the weight-compensating wire 205 with a counterweight 206 (see Non-Patent Literature 2).

[0005] To reduce the weight and improve the performance of the links in the articulated manipulator (robot arm) shown in Figures 9 and 10, resin parts manufactured using fused deposition modeling (FDM) 3D printers with filament melting (FFF) are attracting attention. In particular, carbon fiber reinforced polymer (CFRP) is superior to metal in terms of specific stiffness, specific strength, and size. However, resin parts manufactured using 3D printers cannot be made larger than the size limit set by the print head (build stage) of the FDM 3D printer, and if the print head (build stage) becomes larger, the resulting resin parts will suffer from instability due to thermal shrinkage. On the other hand, the links of articulated manipulators (robot arms) are often larger than the print head (build stage). In this case, it is proposed to join two or more resin parts in the longitudinal direction perpendicular to the layering direction.

[0006] Figure 11 shows a commonly proposed first additively manufactured resin component mating joint, where (A) is a partially perspective overall view and (B) is an overall cross-sectional view.

[0007] In Figure 11, the laminated resin component fitting joint 300 joins laminated resin components 301 and 302, which have vertical joining surfaces 301a and 302a parallel to the lamination direction Y and have longitudinal lengths L1 and L2, with an adhesive layer 303 parallel to the lamination direction Y. As a result, the longitudinal length L of the laminated resin component fitting joint 300 is L = L1 + L2 It can be made larger.

[0008] However, in the laminated resin component fitting joint 300 shown in Figure 11, the area of ​​the vertical bonding surfaces 301a and 302a of the adhesive layer 303 is small, making it weak against bending loads. Furthermore, cracks easily form in the vertical adhesive layer 303, and once cracks form, they tend to extend vertically under bending loads, making them prone to delamination and failure.

[0009] Figure 12 shows a commonly proposed second additively manufactured resin component mating joint, where (A) is a partially perspective overall view and (B) is an overall cross-sectional view.

[0010] In Figure 12, the laminated resin part fitting joint 400 joins laminated resin parts 401 and 402, which have oblique joining surfaces 401a and 402a oblique to the lamination direction Y and lengths L1 and L2 in the longitudinal direction X, with an adhesive layer 403 oblique to the lamination direction Y.

[0011] In the laminated resin component interlocking joint 400 shown in Figure 12, the area of ​​the oblique joint surfaces 401a and 402a of the oblique adhesive layer 403 is large, making it resistant to bending loads. Furthermore, cracks are less likely to form in the oblique adhesive layer 403, and since the cracks are not directly subjected to bending loads, they are less likely to stretch and less likely to delaminate or break. [Prior art documents] [Non-patent literature]

[0012] [Non-Patent Document 1] Shigeo Hirose, Shugen Ma: Development of a Wire Interference Driven Multi-Joint Manipulator, Transactions of the Society of Instrument and Control Engineers, 26-11, 1291 / 1298 (1990) [Non-Patent Document 2] Tomoyuki Ishii, Atsuo Haishi, Shigeo Hirose: Explanation of a self-weight compensation mechanism using wires and double pulleys and performance evaluation of Float Arm V, 20th Anniversary Academic Conference of the Robotics Society of Japan, 2002. [Overview of the project] [Problems that the invention aims to solve]

[0013] However, in the additively manufactured resin component fitting joint 400 shown in Figure 12, the length L of the longitudinal direction X perpendicular to the stacking direction Y of the additively manufactured resin component fitting joint 400 is, L = L1 + L2 - ΔL However, ΔL is the length of the adhesive layer 403 in the longitudinal direction X (the overlapping length in the longitudinal direction X of the laminated resin parts 11 and 12). As a result, the size becomes smaller, and this presents the challenge of not being able to obtain a large additively manufactured resin part fitting joint 400. [Means for solving the problem]

[0014] To solve the above-mentioned problems, the additively manufactured resin part fitting joint according to the present invention has a first conical joint surface Short carbon fiber reinforced thermoplastic A resin part and a second having an inverted conical joint surface Short carbon fiber reinforced thermoplastic Resin parts and the first Short carbon fiber reinforced thermoplastic The conical joint surface of the resin part and the second Short carbon fiber reinforced thermoplastic It comprises a fitting and joining means for fitting and joining the inverted conical joint surface of a resin part. The fitting and joining means is a fused joint between the conical joining surface of the first short carbon fiber reinforced thermoplastic resin part and the inverted conical joining surface of the second short carbon fiber reinforced thermoplastic resin part. [Effects of the Invention]

[0015] According to the present invention, the size of the laminated resin part fitting joint can be increased by the conical joint surface of the first laminated resin part and the inverted conical joint surface of the second laminated resin part. Furthermore, because the joint surface of the fitting joint means is oblique, cracks are less likely to form, and even if there is a crack in the fitting joint means, the crack is less likely to spread due to bending load. [Brief explanation of the drawing]

[0016] [Figure 1]Fig. 1 shows a first embodiment of a laminated molded resin component fitting and joining body according to the present invention, where (A) is a partially transparent overall perspective view and (B) is an overall cross-sectional view. [Figure 2] It is a cross-sectional view for explaining the fitting and joining process of the laminated molded resin component in Fig. 1. [Figure 3] It is a graph showing the results of a bending load experiment, where (A) shows the case of the laminated molded resin component fitting and joining body in Fig. 1, and (B) shows the case of the laminated molded resin component without fitting. [Figure 4] Fig. 2 shows a modified example of the laminated molded resin component fitting and joining body in Fig. 1, where (A) and (B) are perspective views of the laminated molded resin component, (C) is a partially transparent overall perspective view, and (D) is an overall cross-sectional view. [Figure 5] Fig. 3 shows a second embodiment of a laminated molded resin component fitting and joining body according to the present invention, where (A) is a partially transparent overall perspective view and (B) is an overall cross-sectional view. [Figure 6] Fig. 4 shows a third embodiment of a laminated molded resin component fitting and joining body according to the present invention, where (A) and (B) are perspective views of the laminated molded resin component, (C) is a partially transparent overall perspective view, and (D) is an overall cross-sectional view. [Figure 7] Fig. 5 shows a fourth embodiment of a laminated molded resin component fitting and joining body according to the present invention, where (A) is a partially transparent front view of the laminated molded resin component, (B) is a front view of the laminated molded resin component, and (C) is an overall perspective view. [Figure 8] Fig. 6 is an overall cross-sectional view showing a fifth embodiment of a laminated molded resin component fitting and joining body according to the present invention. [Figure 9] Fig. X is a front view showing a first conventional articulated manipulator. [Figure 10] Fig. Y is a front view showing a second conventional articulated manipulator. [Figure 11] Fig. Z shows a first laminated molded resin component fitting and joining body proposed conventionally, where (A) is a partially transparent overall perspective view and (B) is an overall cross-sectional view. [Figure 12] Fig. W shows a second laminated molded resin component fitting and joining body proposed conventionally, where (A) is a partially transparent overall perspective view and (B) is an overall cross-sectional view.

Embodiments for Carrying out the Invention

[0017] Figure 1 shows a first embodiment of the additively manufactured resin component fitting joint according to the present invention, where (A) is a partially perspective view of the entire body and (B) is a cross-sectional view of the entire body.

[0018] In Figure 1, the laminated resin part fitting joint 10 is composed of a laminated resin part 11 which is a rectangular parallelepiped with a square end face and has an inverted conical joint surface 11a, a laminated resin part 12 which has a conical joint surface 12a, and an adhesive layer 13 which fits and joins the inverted conical joint surface 11a of the laminated resin part 11 and the conical joint surface 12a of the laminated resin part 12. In this case, the longitudinal direction X perpendicular to the lamination direction Y of the laminated resin part 11 and the longitudinal direction X perpendicular to the lamination direction Y of the laminated resin part 12 are made continuous.

[0019] The length L in the longitudinal direction X of the laminated resin component fitting joint 10 in Figure 1 is L = L1 + L2 - ΔL However, L1 is the length of the longitudinal direction X of the additively manufactured resin part 11. L2 is the length X in the longitudinal direction of the additively manufactured resin part 12. ΔL is the overlapping length in the longitudinal direction X of the additively manufactured resin parts 11 and 12. This is represented as follows. In this case, the length ΔL in the longitudinal direction X of the laminated resin parts 11 and 12 can be made smaller than the length ΔL in the longitudinal direction X of the laminated resin parts 401 and 402 in Figure 12 by the amount by which the adhesive layer 13 is bent, so the length L in the longitudinal direction X of the laminated resin part fitting joint 10 can be made larger.

[0020] Figure 2 is a cross-sectional view illustrating the fitting and joining process of the additively manufactured resin parts 11 and 12 shown in Figure 1.

[0021] First, referring to Figure 2(A), adhesive 13a is inserted into the bottom of the inverted cone-shaped joint surface 11a of the additively manufactured resin part 11.

[0022] Next, referring to Figure 2(B), the additively manufactured resin part 12 is press-fitted toward the inverted conical joint surface 11a of the additively manufactured resin part 11.

[0023] Finally, referring to Figure 2(C), as the conical joint surface 12a of the additively manufactured resin part 12 approaches the inverted conical joint surface 11a of the additively manufactured resin part 11, the adhesive 13a is extruded and spreads uniformly on the conical joint surface 12a. As a result, the adhesive layer 13 is uniformly formed between the inverted conical joint surface 11a and the conical joint surface 12a. This increases the adhesive strength between the additively manufactured resin parts 11 and 12.

[0024] Figure 3(A) is a graph showing the results of a bending load experiment on the laminated resin part interlocking joint 10 shown in Figure 1. The experimental specimen size was 20 mm × 20 mm × 80 mm, and an epoxy adhesive was used as the adhesive for the adhesive layer 13, with potassium titanate fiber-reinforced polyamide resin used as the resin. As a result, an average bending load value of 3.89 kN was obtained for the three samples. When a similar bending load experiment was performed on a laminated resin part without interlocking, an average bending load value of 3.24 kN was obtained for the three samples shown in Figure 3(B). In other words, results equivalent to or better than those obtained for the case without interlocking were obtained, confirming the adhesive strength of the adhesive layer 13.

[0025] Figure 4 shows a modified example of the additively manufactured resin component fitting joint 10 of Figure 1, where (A) and (B) are perspective views of the additively manufactured resin components 11 and 12, (C) is a partial perspective overall perspective view, and (D) is an overall cross-sectional view.

[0026] As shown in Figure 4(A), a female thread structure 11b is provided at the tip of the inverted conical joint surface 11a of the laminated resin part 11, and as shown in Figure 4(B), a male thread structure 12b is provided at the tip of the conical joint surface 12a of the laminated resin part 12. As shown in Figures 4(C) and (D), when the laminated resin part 12 is rotated and the male thread structure 12b of the laminated resin part 12 is screwed into the female thread structure 11b of the laminated resin part 11, the surface pressure between the inverted conical joint surface 11a of the laminated resin part 11 and the conical joint surface 12a of the laminated resin part 12 is expected to increase, thereby increasing the bonding strength of the adhesive layer 13.

[0027] Figure 5 shows a second embodiment of the additively manufactured resin component fitting joint according to the present invention, where (A) is a partially perspective view of the entire body and (B) is a cross-sectional view of the entire body.

[0028] In Figure 5, the laminated resin part fitting joint 20 is composed of a laminated resin part 21 having a rectangular end face and an inverted elliptic cone-shaped joining surface 21a, a laminated resin part 22 having an elliptic cone-shaped joining surface 22a, and an adhesive layer 23 that fits and joins the inverted elliptic cone-shaped joining surface 21a of the laminated resin part 21 and the elliptic cone-shaped joining surface 22a of the laminated resin part 22. In this case as well, the longitudinal direction X perpendicular to the lamination direction Y of the laminated resin part 21 and the longitudinal direction X perpendicular to the lamination direction Y of the laminated resin part 22 are made continuous.

[0029] In the laminated resin component fitting joint 20 shown in Figure 5, the laminated resin component 22 cannot rotate relative to the laminated resin component 21, so it is more resistant to torsional loads in the longitudinal direction compared to the laminated resin component fitting joint 10 shown in Figure 1.

[0030] Figure 6 shows a third embodiment of the additively manufactured resin part fitting joint according to the present invention, where (A) and (B) are perspective views of the additively manufactured resin part, (C) is a partially perspective overall perspective view, and (D) is an overall cross-sectional view.

[0031] As shown in Figure 6(A), the laminated resin part 31 has an inverted square pyramidal joint surface 31a, and as shown in Figure 6(B), the laminated resin part 32 has a square pyramidal joint surface 32a. As shown in Figures 6(C) and (D), when the square pyramidal joint surface 32a of the laminated resin part 31 is inserted into the inverted square pyramidal joint surface 31a of the laminated resin part 31, the surface pressure between the inverted square pyramidal joint surface 31a of the laminated resin part 31 and the square pyramidal joint surface 32a of the laminated resin part 32 increases, and the bonding force of the adhesive layer 33 increases.

[0032] In the laminated resin component fitting joint 30 shown in Figure 6, the laminated resin component 32 cannot rotate relative to the laminated resin component 31, so it is more resistant to torsional loads in the longitudinal direction compared to the laminated resin component fitting joint 10 shown in Figure 1.

[0033] Furthermore, the inverted square pyramidal joint surface 31a and the square pyramidal joint surface 32a in Figure 6 may be other inverted polygonal pyramidal joint surfaces and polygonal pyramidal joint surfaces, and the end faces of the additively manufactured resin parts 31 and 32 may be square or rectangular.

[0034] Figure 7 shows a fourth embodiment of the additively manufactured resin part fitting joint according to the present invention, where (A) is a partially perspective front view of the additively manufactured resin part, (B) is a front view of the additively manufactured resin part, and (C) is an overall perspective view.

[0035] As shown in Figure 7(A), a sensor 41 is placed between the inverted conical joint surface 11a of the additively manufactured resin part 11 shown in Figures 1 and 4 (the inverted elliptical conical joint surface 21a of the additively manufactured resin part 21 shown in Figure 5 or the inverted square pyramidal joint surface 31a of the additively manufactured resin part 31 shown in Figure 6) and the conical joint surface 12a of the additively manufactured resin part 12 shown in Figures 1 and 4 (the elliptical conical joint surface 22a of the additively manufactured resin part 22 shown in Figure 5 or the square pyramidal joint surface 32a of the additively manufactured resin part 32 shown in Figure 6), and as shown in Figure 7(C), the sensor 41 is built into the additively manufactured resin part fitting joint body 40. At that time, wiring 42a and 42b from the sensor 41 are provided. As a result, when used as a link in a multi-joint manipulator (robot arm), the joint can be monitored in particular by the sensor 41. The sensors 41 include strain sensors, temperature sensors, acceleration sensors (vibration sensors), angular velocity sensors, force sensors, etc.

[0036] Furthermore, the strain sensor 41 can also be provided on the joint surfaces 11a (21a, 31a) and 12a (22a, 32a) of the laminated resin parts 11 (21, 31) and 12 (22, 32). For example, the laminated resin parts 11 (21, 31) and 12 (22, 32) are made of short carbon fiber reinforced thermoplastic resin, and laser light is locally irradiated onto one or both of the joint surfaces 11a (21a, 31a) and 12a (22a, 32a) of the laminated resin parts 11 (21, 31) and 12 (22, 32) to heat and evaporate the thermoplastic resin. As a result, a low-resistance region pattern with a high carbon fiber content that acts as a strain sensor can be formed on one or both of the joint surfaces 11a (21a, 31a) and 12a (22a, 32a). By connecting wirings 41a and 41b to this low-resistance region pattern, a strain sensor can be realized.

[0037] Figure 8 is an overall cross-sectional view showing a fifth embodiment of the laminated resin component fitting joint according to the present invention.

[0038] In Figure 8, the laminated resin component fitting joint 50 consists of multiple laminated resin components 51' and multiple laminated resin components 52' arranged alternately, and these are fitted together by an adhesive layer 53'. In this case, the inverted conical joining surface 51'a of the laminated resin component 51' faces the laminated resin component 52', and the conical joining surface 52'a of the laminated resin component 52' faces the laminated resin component 51', and the inverted conical joining surface 51'a and the conical joining surface 52'a are joined by the adhesive layer 53'. In this way, by arranging three or more laminated resin components 51', 52' continuously in the longitudinal direction X and joining them with an adhesive layer 53', a laminated resin component fitting joint 50 that is long in the longitudinal direction X can be realized.

[0039] In the above-described embodiment, adhesive layers 13, 23, 33, and 53' are used as the fitting and joining means, but a fused joint between the conical joint of the first laminated resin part and the inverted conical joint of the second laminated resin part may also be used.

[0040] The fused joint is formed by the following method. In this case, the first and second laminated resin parts are constructed using, for example, first and second short carbon fiber reinforced thermoplastic resin parts. 1) A portion of the thermoplastic resin is moved or evaporated using laser light, xenon light, a thermoplastic resin solvent, etc., on the conical joint surface of the first short carbon fiber reinforced thermoplastic resin part and / or the inverted conical joint surface of the second short carbon fiber reinforced thermoplastic resin part. This increases the carbon content of all or part of the conical joint surface and / or the inverted conical joint surface, thereby forming a low-resistance region. 2) Two electrodes are provided on the conical junction surface and / or the inverted conical junction surface in the low-resistance region. 3) The conical joint surface and the inverted conical joint surface are fitted together, and an electric current is passed between the two electrodes, melting and joining them by Joule heating. The bonding strength of the fused joint was found to be equal to or greater than that of the adhesive layer.

[0041] Furthermore, the additively manufactured resin parts in the above-described embodiment may be molded by methods other than 3D printing, such as injection molding or compression molding.

[0042] Furthermore, the present invention can be applied to any modification of the above-described embodiments within the scope of what is obvious. [Industrial applicability]

[0043] The additively manufactured resin component fitting and joining body according to the present invention can be used not only for multi-joint manipulators (robot arms) but also for general construction structural members. [Explanation of Symbols]

[0044] 10: Additive-formed resin component mating joint 11, 12: Additive-formed resin parts 11a: Inverted conical joint surface 12a: Conical joint surface 11b: Female thread structure 12b: Male thread structure 13: Adhesive layer 13a: Adhesive 20: Additive-formed resin component mating joint 21, 22: Additive-formed resin parts 21a: Inverted elliptical conical joint surface 22a: Conical joint surface 23: Adhesive layer 30: Additive-formed resin component mating joint 31, 32: Additive-formed resin parts 31a: Inverted quadrangular pyramid joint surface 32a: Quadrilateral pyramidal joint surface 33: Adhesive layer 40: Additive-formed resin component mating joint 41: Sensor 41a, 41b: Wiring 50: Additive-formed resin component mating joint 51', 52': Additive-formed resin parts 53': Adhesive layer 300: Additive-formed resin component mating joint 301, 302: Additive-formed resin parts 301a, 302a: Vertical joint surface 303: Adhesive layer 400: Additive-formed resin component mating joint 401, 402: Additive-formed resin parts 401a, 402a: Oblique joint surface 403: Adhesive layer

Claims

1. A first short carbon fiber reinforced thermoplastic resin part having a conical bonding surface, A second short carbon fiber reinforced thermoplastic resin part having an inverted conical joint surface, A fitting and joining means for fitting and joining the conical joint surface of the first short carbon fiber reinforced thermoplastic resin part and the inverted conical joint surface of the second short carbon fiber reinforced thermoplastic resin part. It is equipped with, The fitting and joining means is a laminated resin part fitting and joining body which is a fused joint between the conical joining surface of the first short carbon fiber reinforced thermoplastic resin part and the inverted conical joining surface of the second short carbon fiber reinforced thermoplastic resin part.

2. The laminated resin component fitting joint according to claim 1, wherein the longitudinal direction perpendicular to the lamination direction of the first short carbon fiber reinforced thermoplastic resin component and the longitudinal direction perpendicular to the lamination direction of the second short carbon fiber reinforced thermoplastic resin component are made continuous.

3. The aforementioned conical joint surface is a conical joint surface, The laminated resin component fitting joint according to claim 1, wherein the aforementioned inverted conical joint surface is an inverted conical joint surface.

4. The tip of the conical joint surface has a female thread structure or a male thread structure. The laminated resin component fitting joint according to claim 3, wherein the tip of the inverted conical joint surface has a male thread structure or female thread structure that fits into the female thread structure or the male thread structure.

5. The aforementioned conical joint surface is an elliptical conical joint surface. The laminated resin component fitting joint according to claim 1, wherein the inverted conical joint surface is an inverted elliptical conical joint surface.

6. The aforementioned conical joint surface is a polygonal pyramidal joint surface, The laminated resin component fitting joint according to claim 1, wherein the aforementioned inverted pyramidal joint surface is an inverted polygonal pyramidal joint surface.

7. The aforementioned polygonal pyramidal joint surface is a square pyramidal joint surface. The laminated resin component fitting joint according to claim 6, wherein the aforementioned inverted polygonal pyramidal joint surface is an inverted square pyramidal joint surface.

8. The laminated resin component fitting joint according to claim 1, wherein a sensor is provided between the conical joint surface and the inverted conical joint surface, or on the conical joint surface and / or the inverted conical joint surface.

9. The additively manufactured resin component fitting and joining body according to claim 8, wherein the sensor is a strain sensor, a temperature sensor, an acceleration sensor, an angular velocity sensor, or a force sensor.

10. The laminated resin component fitting joint according to claim 1, wherein each of the first and second short carbon fiber reinforced thermoplastic resin components is a short carbon fiber reinforced thermoplastic resin component formed by a fused deposition modeling (FDM) 3D printer.

11. A laminated resin component fitting and joining body that fits and joins three or more short carbon fiber reinforced thermoplastic resin components, The first of the three or more short carbon fiber reinforced thermoplastic resin parts has a conical joint surface or an inverted conical joint surface. A second short carbon fiber reinforced thermoplastic resin component adjacent to the first short carbon fiber reinforced thermoplastic resin component of the three or more short carbon fiber reinforced thermoplastic resin components has an inverted conical joint surface or a conical joint surface for fitting and joining with the conical joint surface or inverted conical joint surface of the first short carbon fiber reinforced thermoplastic resin component. A fitting joint means for fitting and joining the conical joint surface or the inverted conical joint surface of the first short carbon fiber reinforced thermoplastic resin part and the inverted conical joint surface or the conical joint surface of the second short carbon fiber reinforced thermoplastic resin part. It is equipped with, The fitting and joining means is a laminated resin part fitting and joining body which is a fused joint between the conical or inverted conical joining surface of the first short carbon fiber reinforced thermoplastic resin part and the inverted conical or conical joining surface of the second short carbon fiber reinforced thermoplastic resin part.

12. The laminated resin component fitting joint according to claim 11, wherein the longitudinal direction perpendicular to the lamination direction of the plurality of short carbon fiber reinforced thermoplastic resin components is made continuous.

13. The aforementioned conical joint surface is a conical joint surface, The laminated resin component fitting joint according to claim 11, wherein the inverted conical joint surface is an inverted conical joint surface.

14. The tip of the conical joint surface has a female thread structure or a male thread structure. The laminated resin component fitting joint according to claim 13, wherein the tip of the inverted conical joint surface has a male thread structure or female thread structure that fits into the female thread structure or the male thread structure.

15. The aforementioned conical joint surface is an elliptical conical joint surface. The laminated resin component fitting joint according to claim 11, wherein the inverted conical joint surface is an inverted elliptical conical joint surface.

16. The aforementioned conical joint surface is a polygonal pyramidal joint surface, The laminated resin component fitting joint according to claim 11, wherein the inverted pyramidal joint surface is an inverted polygonal pyramidal joint surface.

17. The aforementioned polygonal pyramidal joint surface is a square pyramidal joint surface. The laminated resin component fitting joint according to claim 16, wherein the inverted polygonal pyramidal joint surface is an inverted square pyramidal joint surface.

18. The laminated resin component fitting joint according to claim 11, wherein a sensor is provided between the conical joint surface and the inverted conical joint surface, or on the conical joint surface and / or the inverted conical joint surface.

19. The additively manufactured resin component fitting and joining body according to claim 18, wherein the sensor is a strain sensor, a temperature sensor, an acceleration sensor, an angular velocity sensor, or a force sensor.

20. The laminated resin component fitting and joining body according to claim 11, wherein each of the aforementioned short carbon fiber reinforced thermoplastic resin components is a short carbon fiber reinforced thermoplastic resin component formed by a fused deposition modeling (FDM) 3D printer.

21. A method for manufacturing a laminated resin component fitting joint according to Claim 1 or Claim 11, A step to increase the carbon content of all or part of the conical joint surface and / or the inverted conical joint surface of the first short carbon fiber reinforced thermoplastic resin part and / or the second short carbon fiber reinforced thermoplastic resin part by moving or evaporating a portion of the thermoplastic resin using laser light, xenon light, or a thermoplastic resin solvent, thereby forming a low-resistance region; A step of providing two electrodes on the conical junction surface and / or the inverted conical junction surface in the low-resistance region, A process for fitting the conical joint surface and the inverted conical joint surface together, passing an electric current between the two electrodes, and melting them together by Joule heat to form the fused joint; A method for manufacturing a laminated resin component fitting and joining body comprising the above.

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