Mounting structure for linear motor stator, mounting method for it and component assembly machine

Abstract

A linear motor stator is attached to a frame made of fiber-reinforced plastic. The mounting structure for the linear motor stator comprises a through-hole formed in a mounting surface of the frame for the linear motor stator, a coupling element inserted into and connected to the through-hole, and the linear motor stator itself, which is fastened to the coupling element with a screw.

Description

Technical field

[0001] The present description discloses a fastening structure for a linear motor stator, a fastening method for it and a component assembly machine. State of the art

[0002] Previous technology has proposed a component assembler comprising an X-beam in which two rails for sliding a head in the X-axis direction are attached by bolts arranged in the Z-axis direction, a movable drive section attached to one X-beam side of the head, and a fixed drive section attached to one head side of the X-beam (see, for example, patent literature 1). The drive section on the fixed side comprises an electromagnet and a metal plate-shaped element connecting the electromagnet to the X-beam. The X-beam comprises a main body section made of carbon fiber reinforced plastic, a metal connecting section linking the rail to the main body section, and a metal connecting section linking the drive section on the fixed side to the main body section.Each connecting section is positioned so that it extends in the X-axis direction from an end section on the head side of the X-beam in the Y-axis direction and is attached to the main body section with an adhesive. Additionally, each connecting section has mounting holes. A mounting surface of each connecting section for the fixed drive section is pre-machined to improve mounting accuracy. The fixed drive section is attached to the connecting section by screwing a fastener (hexagonal screw) into a screw hole located in the connecting section, for example, by inserting a spiral insert. Citation list for patent literature

[0003] Patent Literature 1: JP-A-2012-138527 Summary of the invention; Technical task

[0004] When fiber-reinforced plastic, such as carbon fiber-reinforced plastic, is used for a frame, such as an X-beam, to which a linear motor stator is attached, it is desirable to achieve the mounting accuracy of the linear motor stator to the frame by a simple procedure, as it is generally difficult to machine the fiber-reinforced plastic.

[0005] A main objective of the present disclosure is to attach a linear motor stator with good accuracy and a simple configuration to a frame made of fiber-reinforced plastic. Solution to the problem

[0006] The present disclosure uses the following means to achieve the main objective described above.

[0007] A mounting structure for a linear motor according to the present disclosure is a mounting structure for a linear motor which attaches the linear motor to a frame made of fiber-reinforced plastic, wherein the mounting structure comprises: a through hole formed in a mounting surface of the frame for the linear motor stator; a coupling element inserted into and connected to the through hole; and the linear motor stator attached to the coupling element by a screw.

[0008] With the mounting structure of a linear motor according to the present disclosure, the linear motor is attached to the frame via the coupling element. By ensuring the accuracy of the coupling element, the linear motor can be attached to the fiber-reinforced plastic frame with good accuracy using a simple configuration.

[0009] The present disclosure can be in the form of a fastening method for a linear motor stator instead of the fastening structure of a linear motor. Accordingly, the fastening method according to the present disclosure can have the same effect as the fastening structure according to the present disclosure.

[0010] Furthermore, a component assembly machine according to the present disclosure comprises: a sliding element comprising a frame made of fiber-reinforced plastic with a through-hole, a coupling element inserted into and connected to the through-hole of the frame, and a linear motor stator attached to the coupling element by a bolt, wherein the sliding element is configured to slide in a predetermined direction; and a movable element mounted in such a way as to be movable in the frame, wherein the movable element comprises a linear motor motion device facing the linear motor stator.

[0011] In the component assembly machine according to the present disclosure, the linear motor stator is attached to the frame via the coupling element. By ensuring the accuracy of the coupling element, the linear motor stator can be attached to the fiber-reinforced plastic frame with good accuracy using a simple configuration. Therefore, a linear motor comprising the linear motor stator and the linear motor drive can be driven with high accuracy, and the assembly accuracy can be further improved. Brief description of the characters Fig. Figure 1 is a perspective view of a machine for assembling components of the present embodiment. Fig. Figure 2 is a top view of the assembly system for components of the present embodiment. Fig. Figure 3 is a perspective view of a head and a sliding element. Fig. Figure 4 is a perspective view of a Y-axis motion device. Fig. Figure 5 is a perspective view of the sliding element and a block element. Fig. Figure 6 is a front view of the sliding element. Fig. Figure 7 is a sectional view along line AA in Fig. 6. Fig. Figure 8 is a process diagram illustrating an example of a fastening process for a linear motor stator. Fig. Figure 9 is a diagram showing how a fastening hole is formed. Fig. Figure 10 is a diagram showing how a coupling element is used. Fig. Figure 11 is a diagram showing how the coupling element is used. Fig. Figure 12 is a diagram showing how thread cutting is performed. Fig. Figure 13 is a diagram showing how a stator mounting surface is machined. Fig. Figure 14 is a diagram showing how a linear motor stator is attached. Description of the embodiments

[0012] Next, embodiments of the present disclosure will be described with reference to the figures.

[0013] Fig. Figure 1 is a perspective view of the component assembly device 10 of the present embodiment. Fig. Figure 2 is a top view of the component assembly device 10 of the present embodiment. Fig. Figure 3 is a perspective view of the head 15 and the sliding element 20. Fig. Figure 4 is a perspective view of the Y-axis motion device 50. Fig. Figure 5 is a perspective view of the sliding element 20 and the block element 40. Fig. Figure 6 is a front view of the sliding element 20. Fig. Figure 7 is a sectional view along line AA in Fig. 6. In the Fig. 1 and Fig. 2. The left-right direction is the X-axis direction, the front-back direction is the Y-axis direction, and the up-down direction is the Z-axis direction.

[0014] The component assembly machine 10 of the present embodiment receives components fed by the feeder F and assembles the components onto the plate S. As in the Fig. 1 and Fig. As shown in Figure 2, the component assembly machine 10 comprises a base 12, a plate conveyor (not shown), a first and a second feed section F1 and F2, a first and a second head 15a and 15b, a first and a second sliding element 20a and 20b, a first and a second X-axis motion device 30a and 30b, and a first and a second Y-axis motion device 50a and 50b. These are housed in a casing 11. A strip-shaped support table 13, extending longitudinally, is arranged on both the left and right sides of an upper stage of the base 12. The first head 15a and the second head 15b can simply be referred to as head 15. The first sliding element 20a and the second sliding element 20b can simply be referred to as sliding element 20.The first X-axis motion device 30a and the second X-axis motion device 30b can simply be referred to as X-axis motion device 30. The first Y-axis motion device 50a and the second Y-axis motion device 50b can simply be referred to as Y-axis motion device 50.

[0015] A feeder that supplies components is attached to and detached from a first and a second feed section F1 and F2. In the present embodiment, a first and a second feed section F1 and F2 are arranged on both the front and the rear of the base 12. The first feed section F1 supplies components to the first head 15a, and the second feed section F2 supplies components to the second head 15b. A feeder can only be arranged on one of the front and rear sides.

[0016] The plate conveyor device is a belt conveyor device that transports the plate S on a conveyor belt from left to right by driving the conveyor belt with a motor.

[0017] The first and second heads 15a and 15b (head 15) include suction nozzles for picking up components. As shown in the Fig. 1 and Fig. As shown in Figure 2, the first head 15a is supported by a first sliding element 20a to allow movement in the left-right direction (X-axis). The second head 15b is supported by a second sliding element 20b, so that it is also movable in the left-right direction (X-axis).

[0018] The first and second sliding elements 20a and 20b (sliding elements 20) are long elements extending in a left-right (X-axis) direction, arranged parallel to each other, and bridged by a pair of left and right Y-axis linear guides 51 (guide rails) made of iron, which are shared by the first and second sliding elements 20a and 20b, and are moved in a front-back direction (Y-axis) along a pair of Y-axis linear guides 51. As shown in Fig. As shown in Figure 3, each of the first and second sliding elements 20a and 20b has a frame 21 formed from carbon fiber reinforced plastic (CFRP) in a rectangular tube shape. The frame 21 can also be made of aramid fiber reinforced plastic (AFRP). By constructing the frame 21 from CFRP or AFRP, the weight of the sliding element 20 can be reduced, and the sliding element 20 can be moved at high speed. Furthermore, the simple rectangular tube shape of the frame 21 facilitates processing with CFRP or AFRP and reduces manufacturing costs.

[0019] A pair of upper and lower X-axis linear guides 31 (guide rails) made of iron, extending parallel to each other in a left-right direction, are connected with opposing side surfaces (side walls) and arranged in each frame 21 of the first and second sliding elements 20a and 20b. The first and second heads 15a and 15b are held by the first and second sliding elements 20a and 20b such that they are movable in the longitudinal direction along the linear X-axis guide 31.

[0020] Although not shown, the X-axis linear guide 31 is connected to the frame 21 by arranging (attaching) a support plate and a back plate having a ribbon-like shape and substantially the same length as the X-axis linear guide 31 to clamp the side walls of the frame 21 from the inner and outer surfaces, and by fastening the X-axis linear guide 31 to a surface of the support plate with bolts.

[0021] The first X-axis motion device 30a moves the first head 15a in the left-right direction (X-axis). The second X-axis motion device 30b moves the second head 15b in the left-right direction (X-axis). As shown in Fig. Figure 3 shows the first and second X-axis motion devices 30a and 30b (X-axis motion device 30) comprising a pair of upper and lower X-axis linear guides 31, an X-axis linear motor 32, several (four) X-axis guide nuts 36 and an X-axis linear encoder (not shown).

[0022] In the present embodiment, the X-axis linear motor 32 is configured as a flat linear motor comprising an X-axis stator 33 attached to a side surface (side wall) of the sliding element 20, and an X-axis motion device 34 arranged such that it is opposite the X-axis stator 33 at a predetermined distance in the front-back direction.

[0023] As in Fig. As shown in Figure 5, the X-axis stator 33 is arranged between a pair of upper and lower X-axis linear guides 31 on the side faces of the frame 21. As shown in Fig. As shown in Figure 6, the X-axis stator 33 comprises a plate-shaped yoke plate 331 extending in the X-axis direction and several permanent magnets 332 arranged and attached to the yoke plate 331 such that the polarities of the N poles and S poles alternate along the X-axis direction. In the present embodiment, the yoke plate 331 is divided into several parts (for example, three parts) and attached to the frame 21 to be arranged in the X-axis direction. In the present embodiment, as shown in Fig. Figure 7 shows the X-axis stator 33 (yoke plate 331) attached to the frame 21 by bolting it to a coupling element 334 (for example, a projection element) connected to the frame 21. Details of an attachment procedure for mounting the X-axis stator 33 to the frame 21 are described later.

[0024] The X-axis motion device 34 comprises several cores, each formed by stacking electromagnetic steel plates, and phase coils, each wound around a corresponding core. The X-axis motion device 34 is supported by X-axis guide nuts 36, each attached to a pair of upper and lower X-axis linear guides 31, and moves in the left-right direction (X-axis) by means of an X-axis motion device 34 to which a three-phase AC voltage is applied to the phase coils. In the present embodiment, two X-axis guide nuts 36 are arranged on each pair of upper and lower X-axis linear guides 31, and the X-axis motion device 34 is supported by a total of four X-axis guide nuts 36.The head 15 is supported by the X-axis motion device 34 and moves together with the X-axis motion device 34 in the left-right direction (X-axis) when the X-axis motion device 34 moves in the left-right direction (X-axis).

[0025] As in the Fig. 4 and Fig. As shown in Figure 5, block elements 40 made of aluminum or an aluminum alloy are connected to both end sections of an opening in the frame 21. Each block element 40 is moved at both end sections by a Y-axis motion device 50 (first Y-axis motion device 50a and second Y-axis motion device 50b) on a corresponding Y-axis linear guide 51, so that the sliding element 20 moves in the front-back direction (Y-axis).

[0026] The first Y-axis motion device 50a moves the first sliding element 20a in the forward-backward direction (Y-axis). The second Y-axis motion device 50b moves the second sliding element 20b in the forward-backward direction (Y-axis). As shown in the Fig. 2 and Fig. As shown in Figure 4, the first and second Y-axis motion devices 50a and 50b (Y-axis motion device 50) comprise a pair of left and right Y-axis linear guides 51, Y-axis linear motors 52 arranged on the left and right sides respectively, and several Y-axis guide nuts 56 slidably mounted on each pair of left and right Y-axis linear guides 51 and the support block element 40. As shown in Fig. As shown in Figure 2, the pair of left and right Y-axis linear guides 51 are arranged on the tops of the support tables 13 on the left and right sides to extend in the front-back direction.

[0027] The Y-axis linear motor 52 is a flat linear motor comprising a Y-axis stator 53, which is attached to the support table 13 to extend in the front-back direction, and a Y-axis motion device 54, which is attached to the block element 40 to be positioned opposite the Y-axis stator 53 at a predetermined distance in the up-down direction. The Y-axis stator 53 has several permanent magnets arranged flat on the same plane as the Y-axis linear guide 51, such that the polarities of the N-poles and S-poles alternate along the Y-axis linear guide 51. In the present embodiment, the permanent magnets of the Y-axis stator 53 are the same as the permanent magnets of the X-axis stator 33. Sharing the components reduces costs.The Y-axis motion device 54 comprises several cores, each formed by stacking electromagnetic steel plates, and phase coils, each wound around a corresponding core. The Y-axis motion device 54 moves in the front-to-back direction (Y-axis) by applying three-phase alternating currents to the phase coils.

[0028] Three Y-axis guide nuts 56 are attached to each pair of left and right Y-axis linear guides 51. Each of the block elements 40, attached to both end sections of the sliding element 20, is fastened to the tops of the three Y-axis guide nuts 56. Accordingly, a load exerted on the block element 40 by the attractive force of the Y-axis linear motor 52 can be distributed almost uniformly across the three Y-axis guide nuts 56, and the movement of the sliding element 20 can be stabilized by reducing the gap change between the Y-axis stator 53 and the Y-axis motion device 54 caused by the attractive force, thus improving the durability of the Y-axis linear guide 51 and the Y-axis guide nut 56.

[0029] As described above, the head 15 can be moved in the forward-backward and left-right directions (XY-axis directions) by moving the sliding element 20 in the forward-backward direction (Y-axis) using the Y-axis movement device 50, and the X-axis movement device 34 in the left-right direction (X-axis) relative to the sliding element 20 using the X-axis movement device 30. As described above, the weight of the sliding element 20 can be reduced by combining the frame 21 with a block element 40 made of aluminum or an aluminum alloy, since the frame 21 of the sliding element 20 is made of CFRP or AFRP, and the head 15 can be moved at a higher speed. Since the frame 21 has a rectangular tube shape, the manufacturing costs can be reduced due to its simple form.

[0030] Next, a method for attaching the X-axis stator 33 of the X-axis linear motor 32 to the frame 21 is described. Fig. Figure 8 is a process diagram illustrating an example of a procedure for attaching a linear motor stator. The following describes the process for attaching the linear motor with reference to the... Fig. 9, Fig. 10, Fig. 11, Fig. 12, Fig. 13 to Fig. 14 described. Although the installation of the X-axis linear guide 31 is carried out in parallel with the process of installing the linear motor, the description of the installation process of the X-axis linear guide 31 is omitted because it is not the core of the present disclosure.

[0031] In the fastening process for the linear motor stator, several through holes 211o and 212o are first formed for fastening the X-axis stator 33 (yoke plate 331) in the frame 21 (step S100). In the present embodiment, as in Fig. Figure 9 shows several through holes 211o and 212o formed, which penetrate in a straight line the mounting surface 211, to which the X-axis stator 33 is attached, and the surface 212 facing the mounting surface 211 under the four surfaces of the frame 21, which has a rectangular tube shape. The through holes 211o and 212o can be formed, for example, during the manufacture of the frame 21. Subsequently, an adhesive is applied to an outer circumferential surface of the coupling element 334 for coupling the frame 21 and the X-axis stator 33 (step S110). The coupling element 334 is, for example, a projecting element and comprises a head section 334h and a shaft section 334s. In the present embodiment, a left-hand thread screw is formed on a circumferential surface of the shaft section 334s.Then, the coupling element 334 is inserted from an inner surface of the frame 21 into the through-hole 211o formed on the mounting surface 211 of the frame 21 (step S120). In the present embodiment, the coupling element 334 is inserted using a tool T after several coupling elements 334 have been roughly positioned with respect to several through-holes 211o formed on the mounting surface 211 of the frame 21. Specifically, the process is carried out as follows. The . Fig. 10 and Fig. Figure 11 shows diagrams illustrating how a coupling element is used. First, the coupling elements 334 are arranged on the respective adjustment sections of a pair of upper and lower retaining devices L, in which the multiple adjustment sections are formed at the same distance as the multiple through holes 211o, and the multiple coupling elements 334 are held by the retaining devices L to be arranged in a row. Then, the retaining device L is inserted into the frame 21 from a cylindrical end face of the frame 21 and is positioned such that multiple through holes 221o of the mounting surface 211 and multiple coupling elements 334 are opposite each other.Then, a tip of the tool T is inserted from an outer surface into the through-hole 212o of the opposite surface 212 and brought into contact with the head section 334h of the coupling element 334, and the shaft section 334s of the coupling element 334 is pressed from an inner surface by the tool T into the corresponding through-hole 211o of the mounting surface 211. This connects and secures the shaft section 334s of the coupling element 334 to the through-hole 211o of the mounting surface 211. Efficiency can be further improved by using a holding device L or a tool T to insert the coupling element 334. The coupling element 334 is secured to the mounting surface 211 in such a way that a distal end section of the shaft section 334s protrudes outwards with respect to the mounting surface 211.

[0032] After several coupling elements 334 were connected to and attached to the frame 21, as shown in Fig. As shown in Figure 12, a thread is cut to form an internally threaded screw at the axial center of the shaft section 334s of the coupling element 334 (step S130). In the present embodiment, a right-hand internally threaded screw is formed at the axial center of the shaft section 334s so that a right-hand bolt 333 can be screwed into it. Subsequently, as shown in Fig. Figure 13 shows that a flattening (cutting) operation is performed to flatten a distal end face of the shaft section 334s of the coupling element 334, to which the X-axis stator 33 (yoke plate 331) is attached (step S140). The flattening is performed such that the distal end face of the shaft section 334s protrudes slightly from the mounting surface 211 of the frame 21. Furthermore, the flattening is carried out after the coupling element 334 has been connected to the frame 21 and the support plate has been attached, so that the mounting surface to which the X-axis stator 33 is attached (the distal end surface of the shaft section 334s of the coupling element 334, which is connected to and attached to the frame 21) and the mounting surface to which the X-axis linear guide 31 is attached (a surface of the belt-like support plate that is attached to the frame 21) are essentially parallel to each other. Then, as in Fig.Figure 14 shows the X-axis stator 33 attached to the coupling element 334 with bolts, while the X-axis stator 33 (yoke plate 331) is brought into contact with the distal end face of the shaft section 334s of the coupling element 334 (step S150), and the attachment of the X-axis stator 33 is complete. The bolting is achieved by inserting the bolt 333 into the through-hole 331o formed in the yoke plate 331 and screwing the bolt 333 into the internal thread formed at the axial center of the shaft section 334s of the coupling element 334. In the present embodiment, the bolt 333 is a right-hand threaded screw, and the external thread is formed on the circumferential surface of the shaft section 334s of the coupling element 334.Since the rotational force acting on the coupling element 334 when the bolt 333 is screwed into the coupling element 334 is directed in the direction of the tightening force of the externally threaded screw of the shaft section 334s of the coupling element 334, loosening of the externally threaded screw can be prevented. It should be noted that the bolt 333 may be designed as a left-hand thread and that the outer circumferential surface of the shaft section 334s of the coupling element 334 may have a right-hand thread.

[0033] Here, the relationship between the elements of the embodiment and the elements of the present disclosure, which are described in the scope of the claims, is clarified. The X-axis stator 33 of the X-axis linear motor 32 of the embodiment corresponds to a linear motor stator of the present disclosure, the frame 21 corresponds to a frame, the through-hole 2110 corresponds to a through-hole, and the coupling element 334 corresponds to a coupling element. The sliding element 20 corresponds to a sliding element, and the X-axis motion device 34 corresponds to a movable element.

[0034] It goes without saying that the present disclosure is in no way limited to the embodiment described above and that the present disclosure can be implemented in various aspects, as long as these aspects fall within the technical scope of the present disclosure.

[0035] For example, in the embodiment described above, the component assembly machine 10 comprises two heads 15 (first and second heads 15a and 15b), but it can also comprise a single head. In this case, the component assembly machine 10 can include a feeder, a sliding element 20, an X-axis motion device 30, and a Y-axis motion device 50, or a set thereof.

[0036] As described above, in a mounting structure for a linear motor according to the present disclosure, a linear motor is attached to a frame via a coupling element. By ensuring the accuracy of the coupling element, the linear motor can be attached to the frame made of fiber-reinforced plastic with good accuracy using a simple configuration.

[0037] In the mounting structure of a linear motor stator according to the present disclosure, a screw groove with an orientation that differs from the orientation of a screw groove of a bolt used for fastening with screws can be formed on an outer circumferential surface of the coupling element. With this configuration, when the linear motor stator is fastened to the coupling element with bolts, a rotational force acting on the coupling element can act in the same direction as a screw of the coupling element is tightened, and loosening of the screw can be prevented.

[0038] The present disclosure may be in the form of a fastening method for a linear motor stator instead of the fastening structure of a linear motor stator.

[0039] In the fastening method for a linear motor stator according to the present disclosure, the coupling element can be inserted into the through-hole from the inside of the frame and connected to it. With this configuration, the coupling element can be more reliably fastened to the fiber-reinforced plastic frame. In this case, the frame can comprise the mounting surface for the linear motor stator and a surface opposite the mounting surface. Through-holes can be formed in both the mounting surface and the opposite surface of the frame. A tool can be inserted through the through-hole of the opposite surface, and the coupling element can be inserted into the through-hole of the mounting surface from the inside of the frame using the tool. This configuration further improves the efficiency of fastening the coupling element to the frame.In these cases, after the coupling element has been inserted into the through-hole and connected to it, a mounting surface of the coupling element for the linear motor can be flattened, and the linear motor can be brought into contact with the flattened surface of the coupling element and attached to the coupling element with a bolt. With this configuration, the linear motor can be attached to the fiber-reinforced plastic frame with good accuracy through simple machining.

[0040] Furthermore, the present disclosure can be in the form of a component assembly machine comprising such a linear motor stator. In the component assembly machine according to the present disclosure, the linear motor stator is attached to the frame via the coupling element. By ensuring the accuracy of the coupling element, the linear motor stator can be attached to the fiber-reinforced plastic frame with good accuracy using a simple configuration. Therefore, a linear motor comprising the linear motor stator and the linear motor drive can be driven with high accuracy, and the assembly precision can be further improved.

[0041] If the linear motor stator is directly connected to and attached to the frame, any damage or similar occurrence to the linear motor stator necessitates the replacement of the entire frame. In contrast, in the present disclosure, the linear motor stator is bolted to the coupling element, which is glued and attached to the frame, allowing the linear motor stator to be removed from the frame and easily replaced. This reduces repair costs and the time required for repairs in the event of a linear motor failure. Industrial applicability

[0042] The present disclosure is applicable to the manufacturing industry for sliding elements, component assembly machines and the like. List of reference symbols

[0043] 10: Component assembly machine, 11: Housing, 12: Base, 13: Support table, 15: Head, 15a: First head, 15b: Second head, 20: Sliding element, 20a: First sliding element, 20b: Second sliding element, 21: Frame, 30: X-axis motion device, 30a: First X-axis motion device, 30b: Second X-axis motion device, 31: X-axis linear guide, 32: X-axis linear motor, 33: X-axis stator, 34: X-axis motion device, 36: X-axis guide nut, 40: Block element, 50: Y-axis motion device, 50a: First Y-axis motion device, 50b: Second Y-axis motion device, 51: Y-axis linear guide, 52: Y-axis linear motor, 53: Y-axis stator, 54: Y-axis motion device, 56: Y-axis guide nut, 211: Mounting surface, 211o: Through hole, 212: End face, 212o: Through hole, 331: Yoke plate, 331o: Through hole, 332: Permanent magnet, 333: Bolt, 334: Coupling element, 334h: Head section, 334s: Shaft section, F1: First feed section,F2: second feed section, S: plate. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP-A-2012-138527

[0003]

Claims

[1] A mounting structure for a linear motor stator, which secures the linear motor stator to a frame made of fiber-reinforced plastic, the mounting structure comprising: a through hole formed in a mounting surface of the frame for the linear motor stator; a coupling element that is inserted into and connected to the through-hole; and the linear motor stator, which is attached to the coupling element with a bolt. [2] The fastening structure of a linear motor according to claim 1, wherein a screw groove with an orientation that differs from the orientation of a screw groove of the bolt used for fastening is formed on a circumferential surface of the coupling element. [3] A fastening method for a linear motor stator, which fastens the linear motor stator to a frame made of fiber-reinforced plastic, the fastening method comprising: Forming a through-hole in a mounting surface of the frame for the linear motor stator; Inserting a coupling element into the through-hole and connecting the coupling element to the through-hole; and Attach the linear motor stator to the coupling element with a bolt. [4] The fastening method for a linear motor stator according to claim 3, wherein the coupling element is inserted from an inside of the frame into the through hole and connected to it. [5] The fastening method for a linear motor stator according to claim 4, wherein the frame comprises the mounting surface for the linear motor stator and a surface opposite the mounting surface, Through holes are formed in the mounting surface and the opposite surface in the frame and a tool is inserted through the through hole of the opposite surface and the coupling element is inserted into the through hole of the mounting surface from the inside of the frame using the tool. [6] The fastening method for a linear motor stator according to one of claims 3 to 5, wherein after the insertion and connection of the coupling element with the through hole, a fastening surface of the coupling element for the linear motor is flattened and the linear motor stator is brought into contact with the flattened surface of the coupling element and is fastened to the coupling element with the bolt. [7] A component assembly machine comprising: a sliding element with a frame made of fiber-reinforced plastic having a through-hole, a coupling element inserted into and connected to the through-hole of the frame, and a linear motor attached to the coupling element by a screw, wherein the sliding element is configured to slide in a predetermined direction; and a movable element which is mounted in such a way that it can move in a direction orthogonal to the specified direction with respect to the frame, wherein the movable element comprises a linear motor which is opposite the linear motor stator.

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